source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp

   1 //===-- ObjectFileMachO.cpp -------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 // C Includes
  11 // C++ Includes
  12 // Other libraries and framework includes
  13 #include "llvm/ADT/StringRef.h"
  14
  15 // Project includes
  16 #include "lldb/Core/ArchSpec.h"
  17 #include "lldb/Core/DataBuffer.h"
  18 #include "lldb/Core/Debugger.h"
  19 #include "lldb/Core/Error.h"
  20 #include "lldb/Core/FileSpecList.h"
  21 #include "lldb/Core/Log.h"
  22 #include "lldb/Core/Module.h"
  23 #include "lldb/Core/ModuleSpec.h"
  24 #include "lldb/Core/PluginManager.h"
  25 #include "lldb/Core/RangeMap.h"
  26 #include "lldb/Core/Section.h"
  27 #include "lldb/Core/StreamFile.h"
  28 #include "lldb/Core/StreamString.h"
  29 #include "lldb/Core/Timer.h"
  30 #include "lldb/Core/UUID.h"
  31 #include "lldb/Host/Host.h"
  32 #include "lldb/Host/FileSpec.h"
  33 #include "lldb/Symbol/DWARFCallFrameInfo.h"
  34 #include "lldb/Symbol/ObjectFile.h"
  35 #include "lldb/Target/MemoryRegionInfo.h"
  36 #include "lldb/Target/Platform.h"
  37 #include "lldb/Target/Process.h"
  38 #include "lldb/Target/SectionLoadList.h"
  39 #include "lldb/Target/Target.h"
  40 #include "lldb/Target/Thread.h"
  41 #include "lldb/Target/ThreadList.h"
  42 #include "Plugins/Process/Utility/RegisterContextDarwin_arm.h"
  43 #include "Plugins/Process/Utility/RegisterContextDarwin_arm64.h"
  44 #include "Plugins/Process/Utility/RegisterContextDarwin_i386.h"
  45 #include "Plugins/Process/Utility/RegisterContextDarwin_x86_64.h"
  46
  47 #include "lldb/Utility/SafeMachO.h"
  48
  49 #include "ObjectFileMachO.h"
  50
  51 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__))
  52 // GetLLDBSharedCacheUUID() needs to call dlsym()
  53 #include <dlfcn.h>
  54 #endif
  55
  56 #ifndef __APPLE__
  57 #include "Utility/UuidCompatibility.h"
  58 #endif
  59
  60 #define THUMB_ADDRESS_BIT_MASK 0xfffffffffffffffeull
  61 using namespace lldb;
  62 using namespace lldb_private;
  63 using namespace llvm::MachO;
  64
  65 // Some structure definitions needed for parsing the dyld shared cache files
  66 // found on iOS devices.
  67
  68 struct lldb_copy_dyld_cache_header_v1
  69 {
  70     char        magic[16];            // e.g. "dyld_v0    i386", "dyld_v1   armv7", etc.
  71     uint32_t    mappingOffset;        // file offset to first dyld_cache_mapping_info
  72     uint32_t    mappingCount;         // number of dyld_cache_mapping_info entries
  73     uint32_t    imagesOffset;
  74     uint32_t    imagesCount;
  75     uint64_t    dyldBaseAddress;
  76     uint64_t    codeSignatureOffset;
  77     uint64_t    codeSignatureSize;
  78     uint64_t    slideInfoOffset;
  79     uint64_t    slideInfoSize;
  80     uint64_t    localSymbolsOffset;
  81     uint64_t    localSymbolsSize;
  82     uint8_t     uuid[16];             // v1 and above, also recorded in dyld_all_image_infos v13 and later
  83 };
  84
  85 struct lldb_copy_dyld_cache_mapping_info
  86 {
  87     uint64_t        address;
  88     uint64_t        size;
  89     uint64_t        fileOffset;
  90     uint32_t        maxProt;
  91     uint32_t        initProt;
  92 };
  93
  94 struct lldb_copy_dyld_cache_local_symbols_info
  95 {
  96     uint32_t        nlistOffset;
  97     uint32_t        nlistCount;
  98     uint32_t        stringsOffset;
  99     uint32_t        stringsSize;
 100     uint32_t        entriesOffset;
 101     uint32_t        entriesCount;
 102 };
 103 struct lldb_copy_dyld_cache_local_symbols_entry
 104 {
 105     uint32_t        dylibOffset;
 106     uint32_t        nlistStartIndex;
 107     uint32_t        nlistCount;
 108 };
 109
 110
 111 class RegisterContextDarwin_x86_64_Mach : public RegisterContextDarwin_x86_64
 112 {
 113 public:
 114     RegisterContextDarwin_x86_64_Mach (lldb_private::Thread &thread, const DataExtractor &data) :
 115         RegisterContextDarwin_x86_64 (thread, 0)
 116     {
 117         SetRegisterDataFrom_LC_THREAD (data);
 118     }
 119
 120     void
 121     InvalidateAllRegisters() override
 122     {
 123         // Do nothing... registers are always valid...
 124     }
 125
 126     void
 127     SetRegisterDataFrom_LC_THREAD (const DataExtractor &data)
 128     {
 129         lldb::offset_t offset = 0;
 130         SetError (GPRRegSet, Read, -1);
 131         SetError (FPURegSet, Read, -1);
 132         SetError (EXCRegSet, Read, -1);
 133         bool done = false;
 134
 135         while (!done)
 136         {
 137             int flavor = data.GetU32 (&offset);
 138             if (flavor == 0)
 139                 done = true;
 140             else
 141             {
 142                 uint32_t i;
 143                 uint32_t count = data.GetU32 (&offset);
 144                 switch (flavor)
 145                 {
 146                     case GPRRegSet:
 147                         for (i=0; i<count; ++i)
 148                             (&gpr.rax)[i] = data.GetU64(&offset);
 149                         SetError (GPRRegSet, Read, 0);
 150                         done = true;
 151
 152                         break;
 153                     case FPURegSet:
 154                         // TODO: fill in FPU regs....
 155                         //SetError (FPURegSet, Read, -1);
 156                         done = true;
 157
 158                         break;
 159                     case EXCRegSet:
 160                         exc.trapno = data.GetU32(&offset);
 161                         exc.err = data.GetU32(&offset);
 162                         exc.faultvaddr = data.GetU64(&offset);
 163                         SetError (EXCRegSet, Read, 0);
 164                         done = true;
 165                         break;
 166                     case 7:
 167                     case 8:
 168                     case 9:
 169                         // fancy flavors that encapsulate of the above
 170                         // flavors...
 171                         break;
 172
 173                     default:
 174                         done = true;
 175                         break;
 176                 }
 177             }
 178         }
 179     }
 180
 181     static size_t
 182     WriteRegister (RegisterContext *reg_ctx, const char *name, const char *alt_name, size_t reg_byte_size, Stream &data)
 183     {
 184         const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName(name);
 185         if (reg_info == NULL)
 186             reg_info = reg_ctx->GetRegisterInfoByName(alt_name);
 187         if (reg_info)
 188         {
 189             lldb_private::RegisterValue reg_value;
 190             if (reg_ctx->ReadRegister(reg_info, reg_value))
 191             {
 192                 if (reg_info->byte_size >= reg_byte_size)
 193                     data.Write(reg_value.GetBytes(), reg_byte_size);
 194                 else
 195                 {
 196                     data.Write(reg_value.GetBytes(), reg_info->byte_size);
 197                     for (size_t i=0, n = reg_byte_size - reg_info->byte_size; i<n; ++ i)
 198                         data.PutChar(0);
 199                 }
 200                 return reg_byte_size;
 201             }
 202         }
 203         // Just write zeros if all else fails
 204         for (size_t i=0; i<reg_byte_size; ++ i)
 205             data.PutChar(0);
 206         return reg_byte_size;
 207     }
 208
 209     static bool
 210     Create_LC_THREAD (Thread *thread, Stream &data)
 211     {
 212         RegisterContextSP reg_ctx_sp (thread->GetRegisterContext());
 213         if (reg_ctx_sp)
 214         {
 215             RegisterContext *reg_ctx = reg_ctx_sp.get();
 216
 217             data.PutHex32 (GPRRegSet);  // Flavor
 218             data.PutHex32 (GPRWordCount);
 219             WriteRegister (reg_ctx, "rax", NULL, 8, data);
 220             WriteRegister (reg_ctx, "rbx", NULL, 8, data);
 221             WriteRegister (reg_ctx, "rcx", NULL, 8, data);
 222             WriteRegister (reg_ctx, "rdx", NULL, 8, data);
 223             WriteRegister (reg_ctx, "rdi", NULL, 8, data);
 224             WriteRegister (reg_ctx, "rsi", NULL, 8, data);
 225             WriteRegister (reg_ctx, "rbp", NULL, 8, data);
 226             WriteRegister (reg_ctx, "rsp", NULL, 8, data);
 227             WriteRegister (reg_ctx, "r8", NULL, 8, data);
 228             WriteRegister (reg_ctx, "r9", NULL, 8, data);
 229             WriteRegister (reg_ctx, "r10", NULL, 8, data);
 230             WriteRegister (reg_ctx, "r11", NULL, 8, data);
 231             WriteRegister (reg_ctx, "r12", NULL, 8, data);
 232             WriteRegister (reg_ctx, "r13", NULL, 8, data);
 233             WriteRegister (reg_ctx, "r14", NULL, 8, data);
 234             WriteRegister (reg_ctx, "r15", NULL, 8, data);
 235             WriteRegister (reg_ctx, "rip", NULL, 8, data);
 236             WriteRegister (reg_ctx, "rflags", NULL, 8, data);
 237             WriteRegister (reg_ctx, "cs", NULL, 8, data);
 238             WriteRegister (reg_ctx, "fs", NULL, 8, data);
 239             WriteRegister (reg_ctx, "gs", NULL, 8, data);
 240
 241 //            // Write out the FPU registers
 242 //            const size_t fpu_byte_size = sizeof(FPU);
 243 //            size_t bytes_written = 0;
 244 //            data.PutHex32 (FPURegSet);
 245 //            data.PutHex32 (fpu_byte_size/sizeof(uint64_t));
 246 //            bytes_written += data.PutHex32(0);                                   // uint32_t pad[0]
 247 //            bytes_written += data.PutHex32(0);                                   // uint32_t pad[1]
 248 //            bytes_written += WriteRegister (reg_ctx, "fcw", "fctrl", 2, data);   // uint16_t    fcw;    // "fctrl"
 249 //            bytes_written += WriteRegister (reg_ctx, "fsw" , "fstat", 2, data);  // uint16_t    fsw;    // "fstat"
 250 //            bytes_written += WriteRegister (reg_ctx, "ftw" , "ftag", 1, data);   // uint8_t     ftw;    // "ftag"
 251 //            bytes_written += data.PutHex8  (0);                                  // uint8_t pad1;
 252 //            bytes_written += WriteRegister (reg_ctx, "fop" , NULL, 2, data);     // uint16_t    fop;    // "fop"
 253 //            bytes_written += WriteRegister (reg_ctx, "fioff", "ip", 4, data);    // uint32_t    ip;     // "fioff"
 254 //            bytes_written += WriteRegister (reg_ctx, "fiseg", NULL, 2, data);    // uint16_t    cs;     // "fiseg"
 255 //            bytes_written += data.PutHex16 (0);                                  // uint16_t    pad2;
 256 //            bytes_written += WriteRegister (reg_ctx, "dp", "fooff" , 4, data);   // uint32_t    dp;     // "fooff"
 257 //            bytes_written += WriteRegister (reg_ctx, "foseg", NULL, 2, data);    // uint16_t    ds;     // "foseg"
 258 //            bytes_written += data.PutHex16 (0);                                  // uint16_t    pad3;
 259 //            bytes_written += WriteRegister (reg_ctx, "mxcsr", NULL, 4, data);    // uint32_t    mxcsr;
 260 //            bytes_written += WriteRegister (reg_ctx, "mxcsrmask", NULL, 4, data);// uint32_t    mxcsrmask;
 261 //            bytes_written += WriteRegister (reg_ctx, "stmm0", NULL, sizeof(MMSReg), data);
 262 //            bytes_written += WriteRegister (reg_ctx, "stmm1", NULL, sizeof(MMSReg), data);
 263 //            bytes_written += WriteRegister (reg_ctx, "stmm2", NULL, sizeof(MMSReg), data);
 264 //            bytes_written += WriteRegister (reg_ctx, "stmm3", NULL, sizeof(MMSReg), data);
 265 //            bytes_written += WriteRegister (reg_ctx, "stmm4", NULL, sizeof(MMSReg), data);
 266 //            bytes_written += WriteRegister (reg_ctx, "stmm5", NULL, sizeof(MMSReg), data);
 267 //            bytes_written += WriteRegister (reg_ctx, "stmm6", NULL, sizeof(MMSReg), data);
 268 //            bytes_written += WriteRegister (reg_ctx, "stmm7", NULL, sizeof(MMSReg), data);
 269 //            bytes_written += WriteRegister (reg_ctx, "xmm0" , NULL, sizeof(XMMReg), data);
 270 //            bytes_written += WriteRegister (reg_ctx, "xmm1" , NULL, sizeof(XMMReg), data);
 271 //            bytes_written += WriteRegister (reg_ctx, "xmm2" , NULL, sizeof(XMMReg), data);
 272 //            bytes_written += WriteRegister (reg_ctx, "xmm3" , NULL, sizeof(XMMReg), data);
 273 //            bytes_written += WriteRegister (reg_ctx, "xmm4" , NULL, sizeof(XMMReg), data);
 274 //            bytes_written += WriteRegister (reg_ctx, "xmm5" , NULL, sizeof(XMMReg), data);
 275 //            bytes_written += WriteRegister (reg_ctx, "xmm6" , NULL, sizeof(XMMReg), data);
 276 //            bytes_written += WriteRegister (reg_ctx, "xmm7" , NULL, sizeof(XMMReg), data);
 277 //            bytes_written += WriteRegister (reg_ctx, "xmm8" , NULL, sizeof(XMMReg), data);
 278 //            bytes_written += WriteRegister (reg_ctx, "xmm9" , NULL, sizeof(XMMReg), data);
 279 //            bytes_written += WriteRegister (reg_ctx, "xmm10", NULL, sizeof(XMMReg), data);
 280 //            bytes_written += WriteRegister (reg_ctx, "xmm11", NULL, sizeof(XMMReg), data);
 281 //            bytes_written += WriteRegister (reg_ctx, "xmm12", NULL, sizeof(XMMReg), data);
 282 //            bytes_written += WriteRegister (reg_ctx, "xmm13", NULL, sizeof(XMMReg), data);
 283 //            bytes_written += WriteRegister (reg_ctx, "xmm14", NULL, sizeof(XMMReg), data);
 284 //            bytes_written += WriteRegister (reg_ctx, "xmm15", NULL, sizeof(XMMReg), data);
 285 //
 286 //            // Fill rest with zeros
 287 //            for (size_t i=0, n = fpu_byte_size - bytes_written; i<n; ++ i)
 288 //                data.PutChar(0);
 289
 290             // Write out the EXC registers
 291             data.PutHex32 (EXCRegSet);
 292             data.PutHex32 (EXCWordCount);
 293             WriteRegister (reg_ctx, "trapno", NULL, 4, data);
 294             WriteRegister (reg_ctx, "err", NULL, 4, data);
 295             WriteRegister (reg_ctx, "faultvaddr", NULL, 8, data);
 296             return true;
 297         }
 298         return false;
 299     }
 300
 301 protected:
 302     int
 303     DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override
 304     {
 305         return 0;
 306     }
 307
 308     int
 309     DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override
 310     {
 311         return 0;
 312     }
 313
 314     int
 315     DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override
 316     {
 317         return 0;
 318     }
 319
 320     int
 321     DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override
 322     {
 323         return 0;
 324     }
 325
 326     int
 327     DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override
 328     {
 329         return 0;
 330     }
 331
 332     int
 333     DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override
 334     {
 335         return 0;
 336     }
 337 };
 338
 339 class RegisterContextDarwin_i386_Mach : public RegisterContextDarwin_i386
 340 {
 341 public:
 342     RegisterContextDarwin_i386_Mach (lldb_private::Thread &thread, const DataExtractor &data) :
 343     RegisterContextDarwin_i386 (thread, 0)
 344     {
 345         SetRegisterDataFrom_LC_THREAD (data);
 346     }
 347
 348     void
 349     InvalidateAllRegisters() override
 350     {
 351         // Do nothing... registers are always valid...
 352     }
 353
 354     void
 355     SetRegisterDataFrom_LC_THREAD (const DataExtractor &data)
 356     {
 357         lldb::offset_t offset = 0;
 358         SetError (GPRRegSet, Read, -1);
 359         SetError (FPURegSet, Read, -1);
 360         SetError (EXCRegSet, Read, -1);
 361         bool done = false;
 362
 363         while (!done)
 364         {
 365             int flavor = data.GetU32 (&offset);
 366             if (flavor == 0)
 367                 done = true;
 368             else
 369             {
 370                 uint32_t i;
 371                 uint32_t count = data.GetU32 (&offset);
 372                 switch (flavor)
 373                 {
 374                     case GPRRegSet:
 375                         for (i=0; i<count; ++i)
 376                             (&gpr.eax)[i] = data.GetU32(&offset);
 377                         SetError (GPRRegSet, Read, 0);
 378                         done = true;
 379
 380                         break;
 381                     case FPURegSet:
 382                         // TODO: fill in FPU regs....
 383                         //SetError (FPURegSet, Read, -1);
 384                         done = true;
 385
 386                         break;
 387                     case EXCRegSet:
 388                         exc.trapno = data.GetU32(&offset);
 389                         exc.err = data.GetU32(&offset);
 390                         exc.faultvaddr = data.GetU32(&offset);
 391                         SetError (EXCRegSet, Read, 0);
 392                         done = true;
 393                         break;
 394                     case 7:
 395                     case 8:
 396                     case 9:
 397                         // fancy flavors that encapsulate of the above
 398                         // flavors...
 399                         break;
 400
 401                     default:
 402                         done = true;
 403                         break;
 404                 }
 405             }
 406         }
 407     }
 408
 409     static size_t
 410     WriteRegister (RegisterContext *reg_ctx, const char *name, const char *alt_name, size_t reg_byte_size, Stream &data)
 411     {
 412         const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName(name);
 413         if (reg_info == NULL)
 414             reg_info = reg_ctx->GetRegisterInfoByName(alt_name);
 415         if (reg_info)
 416         {
 417             lldb_private::RegisterValue reg_value;
 418             if (reg_ctx->ReadRegister(reg_info, reg_value))
 419             {
 420                 if (reg_info->byte_size >= reg_byte_size)
 421                     data.Write(reg_value.GetBytes(), reg_byte_size);
 422                 else
 423                 {
 424                     data.Write(reg_value.GetBytes(), reg_info->byte_size);
 425                     for (size_t i=0, n = reg_byte_size - reg_info->byte_size; i<n; ++ i)
 426                         data.PutChar(0);
 427                 }
 428                 return reg_byte_size;
 429             }
 430         }
 431         // Just write zeros if all else fails
 432         for (size_t i=0; i<reg_byte_size; ++ i)
 433             data.PutChar(0);
 434         return reg_byte_size;
 435     }
 436
 437     static bool
 438     Create_LC_THREAD (Thread *thread, Stream &data)
 439     {
 440         RegisterContextSP reg_ctx_sp (thread->GetRegisterContext());
 441         if (reg_ctx_sp)
 442         {
 443             RegisterContext *reg_ctx = reg_ctx_sp.get();
 444
 445             data.PutHex32 (GPRRegSet);  // Flavor
 446             data.PutHex32 (GPRWordCount);
 447             WriteRegister (reg_ctx, "eax", NULL, 4, data);
 448             WriteRegister (reg_ctx, "ebx", NULL, 4, data);
 449             WriteRegister (reg_ctx, "ecx", NULL, 4, data);
 450             WriteRegister (reg_ctx, "edx", NULL, 4, data);
 451             WriteRegister (reg_ctx, "edi", NULL, 4, data);
 452             WriteRegister (reg_ctx, "esi", NULL, 4, data);
 453             WriteRegister (reg_ctx, "ebp", NULL, 4, data);
 454             WriteRegister (reg_ctx, "esp", NULL, 4, data);
 455             WriteRegister (reg_ctx, "ss", NULL, 4, data);
 456             WriteRegister (reg_ctx, "eflags", NULL, 4, data);
 457             WriteRegister (reg_ctx, "eip", NULL, 4, data);
 458             WriteRegister (reg_ctx, "cs", NULL, 4, data);
 459             WriteRegister (reg_ctx, "ds", NULL, 4, data);
 460             WriteRegister (reg_ctx, "es", NULL, 4, data);
 461             WriteRegister (reg_ctx, "fs", NULL, 4, data);
 462             WriteRegister (reg_ctx, "gs", NULL, 4, data);
 463
 464             // Write out the EXC registers
 465             data.PutHex32 (EXCRegSet);
 466             data.PutHex32 (EXCWordCount);
 467             WriteRegister (reg_ctx, "trapno", NULL, 4, data);
 468             WriteRegister (reg_ctx, "err", NULL, 4, data);
 469             WriteRegister (reg_ctx, "faultvaddr", NULL, 4, data);
 470             return true;
 471         }
 472         return false;
 473     }
 474
 475 protected:
 476     int
 477     DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override
 478     {
 479         return 0;
 480     }
 481
 482     int
 483     DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override
 484     {
 485         return 0;
 486     }
 487
 488     int
 489     DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override
 490     {
 491         return 0;
 492     }
 493
 494     int
 495     DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override
 496     {
 497         return 0;
 498     }
 499
 500     int
 501     DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override
 502     {
 503         return 0;
 504     }
 505
 506     int
 507     DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override
 508     {
 509         return 0;
 510     }
 511 };
 512
 513 class RegisterContextDarwin_arm_Mach : public RegisterContextDarwin_arm
 514 {
 515 public:
 516     RegisterContextDarwin_arm_Mach (lldb_private::Thread &thread, const DataExtractor &data) :
 517         RegisterContextDarwin_arm (thread, 0)
 518     {
 519         SetRegisterDataFrom_LC_THREAD (data);
 520     }
 521
 522     void
 523     InvalidateAllRegisters() override
 524     {
 525         // Do nothing... registers are always valid...
 526     }
 527
 528     void
 529     SetRegisterDataFrom_LC_THREAD (const DataExtractor &data)
 530     {
 531         lldb::offset_t offset = 0;
 532         SetError (GPRRegSet, Read, -1);
 533         SetError (FPURegSet, Read, -1);
 534         SetError (EXCRegSet, Read, -1);
 535         bool done = false;
 536
 537         while (!done)
 538         {
 539             int flavor = data.GetU32 (&offset);
 540             uint32_t count = data.GetU32 (&offset);
 541             lldb::offset_t next_thread_state = offset + (count * 4);
 542             switch (flavor)
 543             {
 544                 case GPRAltRegSet:
 545                 case GPRRegSet:
 546                     for (uint32_t i=0; i<count; ++i)
 547                     {
 548                         gpr.r[i] = data.GetU32(&offset);
 549                     }
 550
 551                     // Note that gpr.cpsr is also copied by the above loop; this loop technically extends
 552                     // one element past the end of the gpr.r[] array.
 553
 554                     SetError (GPRRegSet, Read, 0);
 555                     offset = next_thread_state;
 556                     break;
 557
 558                 case FPURegSet:
 559                     {
 560                         uint8_t  *fpu_reg_buf = (uint8_t*) &fpu.floats.s[0];
 561                         const int fpu_reg_buf_size = sizeof (fpu.floats);
 562                         if (data.ExtractBytes (offset, fpu_reg_buf_size, eByteOrderLittle, fpu_reg_buf) == fpu_reg_buf_size)
 563                         {
 564                             offset += fpu_reg_buf_size;
 565                             fpu.fpscr = data.GetU32(&offset);
 566                             SetError (FPURegSet, Read, 0);
 567                         }
 568                         else
 569                         {
 570                             done = true;
 571                         }
 572                     }
 573                     offset = next_thread_state;
 574                     break;
 575
 576                 case EXCRegSet:
 577                     if (count == 3)
 578                     {
 579                         exc.exception = data.GetU32(&offset);
 580                         exc.fsr = data.GetU32(&offset);
 581                         exc.far = data.GetU32(&offset);
 582                         SetError (EXCRegSet, Read, 0);
 583                     }
 584                     done = true;
 585                     offset = next_thread_state;
 586                     break;
 587
 588                 // Unknown register set flavor, stop trying to parse.
 589                 default:
 590                     done = true;
 591             }
 592         }
 593     }
 594
 595     static size_t
 596     WriteRegister (RegisterContext *reg_ctx, const char *name, const char *alt_name, size_t reg_byte_size, Stream &data)
 597     {
 598         const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName(name);
 599         if (reg_info == NULL)
 600             reg_info = reg_ctx->GetRegisterInfoByName(alt_name);
 601         if (reg_info)
 602         {
 603             lldb_private::RegisterValue reg_value;
 604             if (reg_ctx->ReadRegister(reg_info, reg_value))
 605             {
 606                 if (reg_info->byte_size >= reg_byte_size)
 607                     data.Write(reg_value.GetBytes(), reg_byte_size);
 608                 else
 609                 {
 610                     data.Write(reg_value.GetBytes(), reg_info->byte_size);
 611                     for (size_t i=0, n = reg_byte_size - reg_info->byte_size; i<n; ++ i)
 612                         data.PutChar(0);
 613                 }
 614                 return reg_byte_size;
 615             }
 616         }
 617         // Just write zeros if all else fails
 618         for (size_t i=0; i<reg_byte_size; ++ i)
 619             data.PutChar(0);
 620         return reg_byte_size;
 621     }
 622
 623     static bool
 624     Create_LC_THREAD (Thread *thread, Stream &data)
 625     {
 626         RegisterContextSP reg_ctx_sp (thread->GetRegisterContext());
 627         if (reg_ctx_sp)
 628         {
 629             RegisterContext *reg_ctx = reg_ctx_sp.get();
 630
 631             data.PutHex32 (GPRRegSet);  // Flavor
 632             data.PutHex32 (GPRWordCount);
 633             WriteRegister (reg_ctx, "r0", NULL, 4, data);
 634             WriteRegister (reg_ctx, "r1", NULL, 4, data);
 635             WriteRegister (reg_ctx, "r2", NULL, 4, data);
 636             WriteRegister (reg_ctx, "r3", NULL, 4, data);
 637             WriteRegister (reg_ctx, "r4", NULL, 4, data);
 638             WriteRegister (reg_ctx, "r5", NULL, 4, data);
 639             WriteRegister (reg_ctx, "r6", NULL, 4, data);
 640             WriteRegister (reg_ctx, "r7", NULL, 4, data);
 641             WriteRegister (reg_ctx, "r8", NULL, 4, data);
 642             WriteRegister (reg_ctx, "r9", NULL, 4, data);
 643             WriteRegister (reg_ctx, "r10", NULL, 4, data);
 644             WriteRegister (reg_ctx, "r11", NULL, 4, data);
 645             WriteRegister (reg_ctx, "r12", NULL, 4, data);
 646             WriteRegister (reg_ctx, "sp", NULL, 4, data);
 647             WriteRegister (reg_ctx, "lr", NULL, 4, data);
 648             WriteRegister (reg_ctx, "pc", NULL, 4, data);
 649             WriteRegister (reg_ctx, "cpsr", NULL, 4, data);
 650
 651             // Write out the EXC registers
 652 //            data.PutHex32 (EXCRegSet);
 653 //            data.PutHex32 (EXCWordCount);
 654 //            WriteRegister (reg_ctx, "exception", NULL, 4, data);
 655 //            WriteRegister (reg_ctx, "fsr", NULL, 4, data);
 656 //            WriteRegister (reg_ctx, "far", NULL, 4, data);
 657             return true;
 658         }
 659         return false;
 660     }
 661
 662 protected:
 663     int
 664     DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override
 665     {
 666         return -1;
 667     }
 668
 669     int
 670     DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override
 671     {
 672         return -1;
 673     }
 674
 675     int
 676     DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override
 677     {
 678         return -1;
 679     }
 680
 681     int
 682     DoReadDBG(lldb::tid_t tid, int flavor, DBG &dbg) override
 683     {
 684         return -1;
 685     }
 686
 687     int
 688     DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override
 689     {
 690         return 0;
 691     }
 692
 693     int
 694     DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override
 695     {
 696         return 0;
 697     }
 698
 699     int
 700     DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override
 701     {
 702         return 0;
 703     }
 704
 705     int
 706     DoWriteDBG(lldb::tid_t tid, int flavor, const DBG &dbg) override
 707     {
 708         return -1;
 709     }
 710 };
 711
 712 class RegisterContextDarwin_arm64_Mach : public RegisterContextDarwin_arm64
 713 {
 714 public:
 715     RegisterContextDarwin_arm64_Mach (lldb_private::Thread &thread, const DataExtractor &data) :
 716         RegisterContextDarwin_arm64 (thread, 0)
 717     {
 718         SetRegisterDataFrom_LC_THREAD (data);
 719     }
 720
 721     void
 722     InvalidateAllRegisters() override
 723     {
 724         // Do nothing... registers are always valid...
 725     }
 726
 727     void
 728     SetRegisterDataFrom_LC_THREAD (const DataExtractor &data)
 729     {
 730         lldb::offset_t offset = 0;
 731         SetError (GPRRegSet, Read, -1);
 732         SetError (FPURegSet, Read, -1);
 733         SetError (EXCRegSet, Read, -1);
 734         bool done = false;
 735         while (!done)
 736         {
 737             int flavor = data.GetU32 (&offset);
 738             uint32_t count = data.GetU32 (&offset);
 739             lldb::offset_t next_thread_state = offset + (count * 4);
 740             switch (flavor)
 741             {
 742                 case GPRRegSet:
 743                     // x0-x29 + fp + lr + sp + pc (== 33 64-bit registers) plus cpsr (1 32-bit register)
 744                     if (count >= (33 * 2) + 1)
 745                     {
 746                         for (uint32_t i=0; i<33; ++i)
 747                             gpr.x[i] = data.GetU64(&offset);
 748                         gpr.cpsr = data.GetU32(&offset);
 749                         SetError (GPRRegSet, Read, 0);
 750                     }
 751                     offset = next_thread_state;
 752                     break;
 753                 case FPURegSet:
 754                     {
 755                         uint8_t *fpu_reg_buf = (uint8_t*) &fpu.v[0];
 756                         const int fpu_reg_buf_size = sizeof (fpu);
 757                         if (fpu_reg_buf_size == count
 758                             && data.ExtractBytes (offset, fpu_reg_buf_size, eByteOrderLittle, fpu_reg_buf) == fpu_reg_buf_size)
 759                         {
 760                             SetError (FPURegSet, Read, 0);
 761                         }
 762                         else
 763                         {
 764                             done = true;
 765                         }
 766                     }
 767                     offset = next_thread_state;
 768                     break;
 769                 case EXCRegSet:
 770                     if (count == 4)
 771                     {
 772                         exc.far = data.GetU64(&offset);
 773                         exc.esr = data.GetU32(&offset);
 774                         exc.exception = data.GetU32(&offset);
 775                         SetError (EXCRegSet, Read, 0);
 776                     }
 777                     offset = next_thread_state;
 778                     break;
 779                 default:
 780                     done = true;
 781                     break;
 782             }
 783         }
 784     }
 785
 786     static size_t
 787     WriteRegister (RegisterContext *reg_ctx, const char *name, const char *alt_name, size_t reg_byte_size, Stream &data)
 788     {
 789         const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName(name);
 790         if (reg_info == NULL)
 791             reg_info = reg_ctx->GetRegisterInfoByName(alt_name);
 792         if (reg_info)
 793         {
 794             lldb_private::RegisterValue reg_value;
 795             if (reg_ctx->ReadRegister(reg_info, reg_value))
 796             {
 797                 if (reg_info->byte_size >= reg_byte_size)
 798                     data.Write(reg_value.GetBytes(), reg_byte_size);
 799                 else
 800                 {
 801                     data.Write(reg_value.GetBytes(), reg_info->byte_size);
 802                     for (size_t i=0, n = reg_byte_size - reg_info->byte_size; i<n; ++ i)
 803                         data.PutChar(0);
 804                 }
 805                 return reg_byte_size;
 806             }
 807         }
 808         // Just write zeros if all else fails
 809         for (size_t i=0; i<reg_byte_size; ++ i)
 810             data.PutChar(0);
 811         return reg_byte_size;
 812     }
 813
 814     static bool
 815     Create_LC_THREAD (Thread *thread, Stream &data)
 816     {
 817         RegisterContextSP reg_ctx_sp (thread->GetRegisterContext());
 818         if (reg_ctx_sp)
 819         {
 820             RegisterContext *reg_ctx = reg_ctx_sp.get();
 821
 822             data.PutHex32 (GPRRegSet);  // Flavor
 823             data.PutHex32 (GPRWordCount);
 824             WriteRegister (reg_ctx, "x0", NULL, 8, data);
 825             WriteRegister (reg_ctx, "x1", NULL, 8, data);
 826             WriteRegister (reg_ctx, "x2", NULL, 8, data);
 827             WriteRegister (reg_ctx, "x3", NULL, 8, data);
 828             WriteRegister (reg_ctx, "x4", NULL, 8, data);
 829             WriteRegister (reg_ctx, "x5", NULL, 8, data);
 830             WriteRegister (reg_ctx, "x6", NULL, 8, data);
 831             WriteRegister (reg_ctx, "x7", NULL, 8, data);
 832             WriteRegister (reg_ctx, "x8", NULL, 8, data);
 833             WriteRegister (reg_ctx, "x9", NULL, 8, data);
 834             WriteRegister (reg_ctx, "x10", NULL, 8, data);
 835             WriteRegister (reg_ctx, "x11", NULL, 8, data);
 836             WriteRegister (reg_ctx, "x12", NULL, 8, data);
 837             WriteRegister (reg_ctx, "x13", NULL, 8, data);
 838             WriteRegister (reg_ctx, "x14", NULL, 8, data);
 839             WriteRegister (reg_ctx, "x15", NULL, 8, data);
 840             WriteRegister (reg_ctx, "x16", NULL, 8, data);
 841             WriteRegister (reg_ctx, "x17", NULL, 8, data);
 842             WriteRegister (reg_ctx, "x18", NULL, 8, data);
 843             WriteRegister (reg_ctx, "x19", NULL, 8, data);
 844             WriteRegister (reg_ctx, "x20", NULL, 8, data);
 845             WriteRegister (reg_ctx, "x21", NULL, 8, data);
 846             WriteRegister (reg_ctx, "x22", NULL, 8, data);
 847             WriteRegister (reg_ctx, "x23", NULL, 8, data);
 848             WriteRegister (reg_ctx, "x24", NULL, 8, data);
 849             WriteRegister (reg_ctx, "x25", NULL, 8, data);
 850             WriteRegister (reg_ctx, "x26", NULL, 8, data);
 851             WriteRegister (reg_ctx, "x27", NULL, 8, data);
 852             WriteRegister (reg_ctx, "x28", NULL, 8, data);
 853             WriteRegister (reg_ctx, "fp", NULL, 8, data);
 854             WriteRegister (reg_ctx, "lr", NULL, 8, data);
 855             WriteRegister (reg_ctx, "sp", NULL, 8, data);
 856             WriteRegister (reg_ctx, "pc", NULL, 8, data);
 857             WriteRegister (reg_ctx, "cpsr", NULL, 4, data);
 858
 859             // Write out the EXC registers
 860 //            data.PutHex32 (EXCRegSet);
 861 //            data.PutHex32 (EXCWordCount);
 862 //            WriteRegister (reg_ctx, "far", NULL, 8, data);
 863 //            WriteRegister (reg_ctx, "esr", NULL, 4, data);
 864 //            WriteRegister (reg_ctx, "exception", NULL, 4, data);
 865             return true;
 866         }
 867         return false;
 868     }
 869
 870 protected:
 871     int
 872     DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override
 873     {
 874         return -1;
 875     }
 876
 877     int
 878     DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override
 879     {
 880         return -1;
 881     }
 882
 883     int
 884     DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override
 885     {
 886         return -1;
 887     }
 888
 889     int
 890     DoReadDBG(lldb::tid_t tid, int flavor, DBG &dbg) override
 891     {
 892         return -1;
 893     }
 894
 895     int
 896     DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override
 897     {
 898         return 0;
 899     }
 900
 901     int
 902     DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override
 903     {
 904         return 0;
 905     }
 906
 907     int
 908     DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override
 909     {
 910         return 0;
 911     }
 912
 913     int
 914     DoWriteDBG(lldb::tid_t tid, int flavor, const DBG &dbg) override
 915     {
 916         return -1;
 917     }
 918 };
 919
 920 static uint32_t
 921 MachHeaderSizeFromMagic(uint32_t magic)
 922 {
 923     switch (magic)
 924     {
 925         case MH_MAGIC:
 926         case MH_CIGAM:
 927             return sizeof(struct mach_header);
 928
 929         case MH_MAGIC_64:
 930         case MH_CIGAM_64:
 931             return sizeof(struct mach_header_64);
 932             break;
 933
 934         default:
 935             break;
 936     }
 937     return 0;
 938 }
 939
 940 #define MACHO_NLIST_ARM_SYMBOL_IS_THUMB 0x0008
 941
 942 void
 943 ObjectFileMachO::Initialize()
 944 {
 945     PluginManager::RegisterPlugin (GetPluginNameStatic(),
 946                                    GetPluginDescriptionStatic(),
 947                                    CreateInstance,
 948                                    CreateMemoryInstance,
 949                                    GetModuleSpecifications,
 950                                    SaveCore);
 951 }
 952
 953 void
 954 ObjectFileMachO::Terminate()
 955 {
 956     PluginManager::UnregisterPlugin (CreateInstance);
 957 }
 958
 959 lldb_private::ConstString
 960 ObjectFileMachO::GetPluginNameStatic()
 961 {
 962     static ConstString g_name("mach-o");
 963     return g_name;
 964 }
 965
 966 const char *
 967 ObjectFileMachO::GetPluginDescriptionStatic()
 968 {
 969     return "Mach-o object file reader (32 and 64 bit)";
 970 }
 971
 972 ObjectFile *
 973 ObjectFileMachO::CreateInstance (const lldb::ModuleSP &module_sp,
 974                                  DataBufferSP& data_sp,
 975                                  lldb::offset_t data_offset,
 976                                  const FileSpec* file,
 977                                  lldb::offset_t file_offset,
 978                                  lldb::offset_t length)
 979 {
 980     if (!data_sp)
 981     {
 982         data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length);
 983         data_offset = 0;
 984     }
 985
 986     if (ObjectFileMachO::MagicBytesMatch(data_sp, data_offset, length))
 987     {
 988         // Update the data to contain the entire file if it doesn't already
 989         if (data_sp->GetByteSize() < length)
 990         {
 991             data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length);
 992             data_offset = 0;
 993         }
 994         std::unique_ptr<ObjectFile> objfile_ap(new ObjectFileMachO (module_sp, data_sp, data_offset, file, file_offset, length));
 995         if (objfile_ap.get() && objfile_ap->ParseHeader())
 996             return objfile_ap.release();
 997     }
 998     return NULL;
 999 }
1000
1001 ObjectFile *
1002 ObjectFileMachO::CreateMemoryInstance (const lldb::ModuleSP &module_sp,
1003                                        DataBufferSP& data_sp,
1004                                        const ProcessSP &process_sp,
1005                                        lldb::addr_t header_addr)
1006 {
1007     if (ObjectFileMachO::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize()))
1008     {
1009         std::unique_ptr<ObjectFile> objfile_ap(new ObjectFileMachO (module_sp, data_sp, process_sp, header_addr));
1010         if (objfile_ap.get() && objfile_ap->ParseHeader())
1011             return objfile_ap.release();
1012     }
1013     return NULL;
1014 }
1015
1016 size_t
1017 ObjectFileMachO::GetModuleSpecifications (const lldb_private::FileSpec& file,
1018                                           lldb::DataBufferSP& data_sp,
1019                                           lldb::offset_t data_offset,
1020                                           lldb::offset_t file_offset,
1021                                           lldb::offset_t length,
1022                                           lldb_private::ModuleSpecList &specs)
1023 {
1024     const size_t initial_count = specs.GetSize();
1025
1026     if (ObjectFileMachO::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize()))
1027     {
1028         DataExtractor data;
1029         data.SetData(data_sp);
1030         llvm::MachO::mach_header header;
1031         if (ParseHeader (data, &data_offset, header))
1032         {
1033             size_t header_and_load_cmds = header.sizeofcmds + MachHeaderSizeFromMagic(header.magic);
1034             if (header_and_load_cmds >= data_sp->GetByteSize())
1035             {
1036                 data_sp = file.ReadFileContents(file_offset, header_and_load_cmds);
1037                 data.SetData(data_sp);
1038                 data_offset = MachHeaderSizeFromMagic(header.magic);
1039             }
1040             if (data_sp)
1041             {
1042                 ModuleSpec spec;
1043                 spec.GetFileSpec() = file;
1044                 spec.SetObjectOffset(file_offset);
1045                 spec.SetObjectSize(length);
1046
1047                 if (GetArchitecture (header, data, data_offset, spec.GetArchitecture()))
1048                 {
1049                     if (spec.GetArchitecture().IsValid())
1050                     {
1051                         GetUUID (header, data, data_offset, spec.GetUUID());
1052                         specs.Append(spec);
1053                     }
1054                 }
1055             }
1056         }
1057     }
1058     return specs.GetSize() - initial_count;
1059 }
1060
1061 const ConstString &
1062 ObjectFileMachO::GetSegmentNameTEXT()
1063 {
1064     static ConstString g_segment_name_TEXT ("__TEXT");
1065     return g_segment_name_TEXT;
1066 }
1067
1068 const ConstString &
1069 ObjectFileMachO::GetSegmentNameDATA()
1070 {
1071     static ConstString g_segment_name_DATA ("__DATA");
1072     return g_segment_name_DATA;
1073 }
1074
1075 const ConstString &
1076 ObjectFileMachO::GetSegmentNameDATA_DIRTY()
1077 {
1078     static ConstString g_segment_name ("__DATA_DIRTY");
1079     return g_segment_name;
1080 }
1081
1082 const ConstString &
1083 ObjectFileMachO::GetSegmentNameDATA_CONST()
1084 {
1085     static ConstString g_segment_name ("__DATA_CONST");
1086     return g_segment_name;
1087 }
1088
1089 const ConstString &
1090 ObjectFileMachO::GetSegmentNameOBJC()
1091 {
1092     static ConstString g_segment_name_OBJC ("__OBJC");
1093     return g_segment_name_OBJC;
1094 }
1095
1096 const ConstString &
1097 ObjectFileMachO::GetSegmentNameLINKEDIT()
1098 {
1099     static ConstString g_section_name_LINKEDIT ("__LINKEDIT");
1100     return g_section_name_LINKEDIT;
1101 }
1102
1103 const ConstString &
1104 ObjectFileMachO::GetSectionNameEHFrame()
1105 {
1106     static ConstString g_section_name_eh_frame ("__eh_frame");
1107     return g_section_name_eh_frame;
1108 }
1109
1110 bool
1111 ObjectFileMachO::MagicBytesMatch (DataBufferSP& data_sp,
1112                                   lldb::addr_t data_offset,
1113                                   lldb::addr_t data_length)
1114 {
1115     DataExtractor data;
1116     data.SetData (data_sp, data_offset, data_length);
1117     lldb::offset_t offset = 0;
1118     uint32_t magic = data.GetU32(&offset);
1119     return MachHeaderSizeFromMagic(magic) != 0;
1120 }
1121
1122 ObjectFileMachO::ObjectFileMachO(const lldb::ModuleSP &module_sp,
1123                                  DataBufferSP& data_sp,
1124                                  lldb::offset_t data_offset,
1125                                  const FileSpec* file,
1126                                  lldb::offset_t file_offset,
1127                                  lldb::offset_t length) :
1128     ObjectFile(module_sp, file, file_offset, length, data_sp, data_offset),
1129     m_mach_segments(),
1130     m_mach_sections(),
1131     m_entry_point_address(),
1132     m_thread_context_offsets(),
1133     m_thread_context_offsets_valid(false),
1134     m_reexported_dylibs (),
1135     m_allow_assembly_emulation_unwind_plans (true)
1136 {
1137     ::memset (&m_header, 0, sizeof(m_header));
1138     ::memset (&m_dysymtab, 0, sizeof(m_dysymtab));
1139 }
1140
1141 ObjectFileMachO::ObjectFileMachO (const lldb::ModuleSP &module_sp,
1142                                   lldb::DataBufferSP& header_data_sp,
1143                                   const lldb::ProcessSP &process_sp,
1144                                   lldb::addr_t header_addr) :
1145     ObjectFile(module_sp, process_sp, header_addr, header_data_sp),
1146     m_mach_segments(),
1147     m_mach_sections(),
1148     m_entry_point_address(),
1149     m_thread_context_offsets(),
1150     m_thread_context_offsets_valid(false),
1151     m_reexported_dylibs (),
1152     m_allow_assembly_emulation_unwind_plans (true)
1153 {
1154     ::memset (&m_header, 0, sizeof(m_header));
1155     ::memset (&m_dysymtab, 0, sizeof(m_dysymtab));
1156 }
1157
1158 bool
1159 ObjectFileMachO::ParseHeader (DataExtractor &data,
1160                               lldb::offset_t *data_offset_ptr,
1161                               llvm::MachO::mach_header &header)
1162 {
1163     data.SetByteOrder (endian::InlHostByteOrder());
1164     // Leave magic in the original byte order
1165     header.magic = data.GetU32(data_offset_ptr);
1166     bool can_parse = false;
1167     bool is_64_bit = false;
1168     switch (header.magic)
1169     {
1170         case MH_MAGIC:
1171             data.SetByteOrder (endian::InlHostByteOrder());
1172             data.SetAddressByteSize(4);
1173             can_parse = true;
1174             break;
1175
1176         case MH_MAGIC_64:
1177             data.SetByteOrder (endian::InlHostByteOrder());
1178             data.SetAddressByteSize(8);
1179             can_parse = true;
1180             is_64_bit = true;
1181             break;
1182
1183         case MH_CIGAM:
1184             data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig);
1185             data.SetAddressByteSize(4);
1186             can_parse = true;
1187             break;
1188
1189         case MH_CIGAM_64:
1190             data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig);
1191             data.SetAddressByteSize(8);
1192             is_64_bit = true;
1193             can_parse = true;
1194             break;
1195
1196         default:
1197             break;
1198     }
1199
1200     if (can_parse)
1201     {
1202         data.GetU32(data_offset_ptr, &header.cputype, 6);
1203         if (is_64_bit)
1204             *data_offset_ptr += 4;
1205         return true;
1206     }
1207     else
1208     {
1209         memset(&header, 0, sizeof(header));
1210     }
1211     return false;
1212 }
1213
1214 bool
1215 ObjectFileMachO::ParseHeader ()
1216 {
1217     ModuleSP module_sp(GetModule());
1218     if (module_sp)
1219     {
1220         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
1221         bool can_parse = false;
1222         lldb::offset_t offset = 0;
1223         m_data.SetByteOrder (endian::InlHostByteOrder());
1224         // Leave magic in the original byte order
1225         m_header.magic = m_data.GetU32(&offset);
1226         switch (m_header.magic)
1227         {
1228         case MH_MAGIC:
1229             m_data.SetByteOrder (endian::InlHostByteOrder());
1230             m_data.SetAddressByteSize(4);
1231             can_parse = true;
1232             break;
1233
1234         case MH_MAGIC_64:
1235             m_data.SetByteOrder (endian::InlHostByteOrder());
1236             m_data.SetAddressByteSize(8);
1237             can_parse = true;
1238             break;
1239
1240         case MH_CIGAM:
1241             m_data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig);
1242             m_data.SetAddressByteSize(4);
1243             can_parse = true;
1244             break;
1245
1246         case MH_CIGAM_64:
1247             m_data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig);
1248             m_data.SetAddressByteSize(8);
1249             can_parse = true;
1250             break;
1251
1252         default:
1253             break;
1254         }
1255
1256         if (can_parse)
1257         {
1258             m_data.GetU32(&offset, &m_header.cputype, 6);
1259
1260
1261             ArchSpec mach_arch;
1262
1263             if (GetArchitecture (mach_arch))
1264             {
1265                 // Check if the module has a required architecture
1266                 const ArchSpec &module_arch = module_sp->GetArchitecture();
1267                 if (module_arch.IsValid() && !module_arch.IsCompatibleMatch(mach_arch))
1268                     return false;
1269
1270                 if (SetModulesArchitecture (mach_arch))
1271                 {
1272                     const size_t header_and_lc_size = m_header.sizeofcmds + MachHeaderSizeFromMagic(m_header.magic);
1273                     if (m_data.GetByteSize() < header_and_lc_size)
1274                     {
1275                         DataBufferSP data_sp;
1276                         ProcessSP process_sp (m_process_wp.lock());
1277                         if (process_sp)
1278                         {
1279                             data_sp = ReadMemory (process_sp, m_memory_addr, header_and_lc_size);
1280                         }
1281                         else
1282                         {
1283                             // Read in all only the load command data from the file on disk
1284                             data_sp = m_file.ReadFileContents(m_file_offset, header_and_lc_size);
1285                             if (data_sp->GetByteSize() != header_and_lc_size)
1286                                 return false;
1287                         }
1288                         if (data_sp)
1289                             m_data.SetData (data_sp);
1290                     }
1291                 }
1292                 return true;
1293             }
1294         }
1295         else
1296         {
1297             memset(&m_header, 0, sizeof(struct mach_header));
1298         }
1299     }
1300     return false;
1301 }
1302
1303 ByteOrder
1304 ObjectFileMachO::GetByteOrder () const
1305 {
1306     return m_data.GetByteOrder ();
1307 }
1308
1309 bool
1310 ObjectFileMachO::IsExecutable() const
1311 {
1312     return m_header.filetype == MH_EXECUTE;
1313 }
1314
1315 uint32_t
1316 ObjectFileMachO::GetAddressByteSize () const
1317 {
1318     return m_data.GetAddressByteSize ();
1319 }
1320
1321 AddressClass
1322 ObjectFileMachO::GetAddressClass (lldb::addr_t file_addr)
1323 {
1324     Symtab *symtab = GetSymtab();
1325     if (symtab)
1326     {
1327         Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr);
1328         if (symbol)
1329         {
1330             if (symbol->ValueIsAddress())
1331             {
1332                 SectionSP section_sp (symbol->GetAddressRef().GetSection());
1333                 if (section_sp)
1334                 {
1335                     const lldb::SectionType section_type = section_sp->GetType();
1336                     switch (section_type)
1337                     {
1338                     case eSectionTypeInvalid:
1339                         return eAddressClassUnknown;
1340
1341                     case eSectionTypeCode:
1342                         if (m_header.cputype == llvm::MachO::CPU_TYPE_ARM)
1343                         {
1344                             // For ARM we have a bit in the n_desc field of the symbol
1345                             // that tells us ARM/Thumb which is bit 0x0008.
1346                             if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB)
1347                                 return eAddressClassCodeAlternateISA;
1348                         }
1349                         return eAddressClassCode;
1350
1351                     case eSectionTypeContainer:
1352                         return eAddressClassUnknown;
1353
1354                     case eSectionTypeData:
1355                     case eSectionTypeDataCString:
1356                     case eSectionTypeDataCStringPointers:
1357                     case eSectionTypeDataSymbolAddress:
1358                     case eSectionTypeData4:
1359                     case eSectionTypeData8:
1360                     case eSectionTypeData16:
1361                     case eSectionTypeDataPointers:
1362                     case eSectionTypeZeroFill:
1363                     case eSectionTypeDataObjCMessageRefs:
1364                     case eSectionTypeDataObjCCFStrings:
1365                     case eSectionTypeGoSymtab:
1366                         return eAddressClassData;
1367
1368                     case eSectionTypeDebug:
1369                     case eSectionTypeDWARFDebugAbbrev:
1370                     case eSectionTypeDWARFDebugAddr:
1371                     case eSectionTypeDWARFDebugAranges:
1372                     case eSectionTypeDWARFDebugFrame:
1373                     case eSectionTypeDWARFDebugInfo:
1374                     case eSectionTypeDWARFDebugLine:
1375                     case eSectionTypeDWARFDebugLoc:
1376                     case eSectionTypeDWARFDebugMacInfo:
1377                     case eSectionTypeDWARFDebugMacro:
1378                     case eSectionTypeDWARFDebugPubNames:
1379                     case eSectionTypeDWARFDebugPubTypes:
1380                     case eSectionTypeDWARFDebugRanges:
1381                     case eSectionTypeDWARFDebugStr:
1382                     case eSectionTypeDWARFDebugStrOffsets:
1383                     case eSectionTypeDWARFAppleNames:
1384                     case eSectionTypeDWARFAppleTypes:
1385                     case eSectionTypeDWARFAppleNamespaces:
1386                     case eSectionTypeDWARFAppleObjC:
1387                         return eAddressClassDebug;
1388
1389                     case eSectionTypeEHFrame:
1390                     case eSectionTypeARMexidx:
1391                     case eSectionTypeARMextab:
1392                     case eSectionTypeCompactUnwind:
1393                         return eAddressClassRuntime;
1394
1395                     case eSectionTypeAbsoluteAddress:
1396                     case eSectionTypeELFSymbolTable:
1397                     case eSectionTypeELFDynamicSymbols:
1398                     case eSectionTypeELFRelocationEntries:
1399                     case eSectionTypeELFDynamicLinkInfo:
1400                     case eSectionTypeOther:
1401                         return eAddressClassUnknown;
1402                     }
1403                 }
1404             }
1405
1406             const SymbolType symbol_type = symbol->GetType();
1407             switch (symbol_type)
1408             {
1409             case eSymbolTypeAny:            return eAddressClassUnknown;
1410             case eSymbolTypeAbsolute:       return eAddressClassUnknown;
1411
1412             case eSymbolTypeCode:
1413             case eSymbolTypeTrampoline:
1414             case eSymbolTypeResolver:
1415                 if (m_header.cputype == llvm::MachO::CPU_TYPE_ARM)
1416                 {
1417                     // For ARM we have a bit in the n_desc field of the symbol
1418                     // that tells us ARM/Thumb which is bit 0x0008.
1419                     if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB)
1420                         return eAddressClassCodeAlternateISA;
1421                 }
1422                 return eAddressClassCode;
1423
1424             case eSymbolTypeData:           return eAddressClassData;
1425             case eSymbolTypeRuntime:        return eAddressClassRuntime;
1426             case eSymbolTypeException:      return eAddressClassRuntime;
1427             case eSymbolTypeSourceFile:     return eAddressClassDebug;
1428             case eSymbolTypeHeaderFile:     return eAddressClassDebug;
1429             case eSymbolTypeObjectFile:     return eAddressClassDebug;
1430             case eSymbolTypeCommonBlock:    return eAddressClassDebug;
1431             case eSymbolTypeBlock:          return eAddressClassDebug;
1432             case eSymbolTypeLocal:          return eAddressClassData;
1433             case eSymbolTypeParam:          return eAddressClassData;
1434             case eSymbolTypeVariable:       return eAddressClassData;
1435             case eSymbolTypeVariableType:   return eAddressClassDebug;
1436             case eSymbolTypeLineEntry:      return eAddressClassDebug;
1437             case eSymbolTypeLineHeader:     return eAddressClassDebug;
1438             case eSymbolTypeScopeBegin:     return eAddressClassDebug;
1439             case eSymbolTypeScopeEnd:       return eAddressClassDebug;
1440             case eSymbolTypeAdditional:     return eAddressClassUnknown;
1441             case eSymbolTypeCompiler:       return eAddressClassDebug;
1442             case eSymbolTypeInstrumentation:return eAddressClassDebug;
1443             case eSymbolTypeUndefined:      return eAddressClassUnknown;
1444             case eSymbolTypeObjCClass:      return eAddressClassRuntime;
1445             case eSymbolTypeObjCMetaClass:  return eAddressClassRuntime;
1446             case eSymbolTypeObjCIVar:       return eAddressClassRuntime;
1447             case eSymbolTypeReExported:     return eAddressClassRuntime;
1448             }
1449         }
1450     }
1451     return eAddressClassUnknown;
1452 }
1453
1454 Symtab *
1455 ObjectFileMachO::GetSymtab()
1456 {
1457     ModuleSP module_sp(GetModule());
1458     if (module_sp)
1459     {
1460         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
1461         if (m_symtab_ap.get() == NULL)
1462         {
1463             m_symtab_ap.reset(new Symtab(this));
1464             std::lock_guard<std::recursive_mutex> symtab_guard(m_symtab_ap->GetMutex());
1465             ParseSymtab ();
1466             m_symtab_ap->Finalize ();
1467         }
1468     }
1469     return m_symtab_ap.get();
1470 }
1471
1472 bool
1473 ObjectFileMachO::IsStripped ()
1474 {
1475     if (m_dysymtab.cmd == 0)
1476     {
1477         ModuleSP module_sp(GetModule());
1478         if (module_sp)
1479         {
1480             lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
1481             for (uint32_t i=0; i<m_header.ncmds; ++i)
1482             {
1483                 const lldb::offset_t load_cmd_offset = offset;
1484
1485                 load_command lc;
1486                 if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL)
1487                     break;
1488                 if (lc.cmd == LC_DYSYMTAB)
1489                 {
1490                     m_dysymtab.cmd = lc.cmd;
1491                     m_dysymtab.cmdsize = lc.cmdsize;
1492                     if (m_data.GetU32 (&offset, &m_dysymtab.ilocalsym, (sizeof(m_dysymtab) / sizeof(uint32_t)) - 2) == NULL)
1493                     {
1494                         // Clear m_dysymtab if we were unable to read all items from the load command
1495                         ::memset (&m_dysymtab, 0, sizeof(m_dysymtab));
1496                     }
1497                 }
1498                 offset = load_cmd_offset + lc.cmdsize;
1499             }
1500         }
1501     }
1502     if (m_dysymtab.cmd)
1503         return m_dysymtab.nlocalsym <= 1;
1504     return false;
1505 }
1506
1507 void
1508 ObjectFileMachO::CreateSections (SectionList &unified_section_list)
1509 {
1510     if (!m_sections_ap.get())
1511     {
1512         m_sections_ap.reset(new SectionList());
1513
1514         const bool is_dsym = (m_header.filetype == MH_DSYM);
1515         lldb::user_id_t segID = 0;
1516         lldb::user_id_t sectID = 0;
1517         lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
1518         uint32_t i;
1519         const bool is_core = GetType() == eTypeCoreFile;
1520         //bool dump_sections = false;
1521         ModuleSP module_sp (GetModule());
1522         // First look up any LC_ENCRYPTION_INFO load commands
1523         typedef RangeArray<uint32_t, uint32_t, 8> EncryptedFileRanges;
1524         EncryptedFileRanges encrypted_file_ranges;
1525         encryption_info_command encryption_cmd;
1526         for (i=0; i<m_header.ncmds; ++i)
1527         {
1528             const lldb::offset_t load_cmd_offset = offset;
1529             if (m_data.GetU32(&offset, &encryption_cmd, 2) == NULL)
1530                 break;
1531
1532             // LC_ENCRYPTION_INFO and LC_ENCRYPTION_INFO_64 have the same sizes for
1533             // the 3 fields we care about, so treat them the same.
1534             if (encryption_cmd.cmd == LC_ENCRYPTION_INFO || encryption_cmd.cmd == LC_ENCRYPTION_INFO_64)
1535             {
1536                 if (m_data.GetU32(&offset, &encryption_cmd.cryptoff, 3))
1537                 {
1538                     if (encryption_cmd.cryptid != 0)
1539                     {
1540                         EncryptedFileRanges::Entry entry;
1541                         entry.SetRangeBase(encryption_cmd.cryptoff);
1542                         entry.SetByteSize(encryption_cmd.cryptsize);
1543                         encrypted_file_ranges.Append(entry);
1544                     }
1545                 }
1546             }
1547             offset = load_cmd_offset + encryption_cmd.cmdsize;
1548         }
1549
1550         bool section_file_addresses_changed = false;
1551
1552         offset = MachHeaderSizeFromMagic(m_header.magic);
1553
1554         struct segment_command_64 load_cmd;
1555         for (i=0; i<m_header.ncmds; ++i)
1556         {
1557             const lldb::offset_t load_cmd_offset = offset;
1558             if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
1559                 break;
1560
1561             if (load_cmd.cmd == LC_SEGMENT || load_cmd.cmd == LC_SEGMENT_64)
1562             {
1563                 if (m_data.GetU8(&offset, (uint8_t*)load_cmd.segname, 16))
1564                 {
1565                     bool add_section = true;
1566                     bool add_to_unified = true;
1567                     ConstString const_segname (load_cmd.segname, std::min<size_t>(strlen(load_cmd.segname), sizeof(load_cmd.segname)));
1568
1569                     SectionSP unified_section_sp(unified_section_list.FindSectionByName(const_segname));
1570                     if (is_dsym && unified_section_sp)
1571                     {
1572                         if (const_segname == GetSegmentNameLINKEDIT())
1573                         {
1574                             // We need to keep the __LINKEDIT segment private to this object file only
1575                             add_to_unified = false;
1576                         }
1577                         else
1578                         {
1579                             // This is the dSYM file and this section has already been created by
1580                             // the object file, no need to create it.
1581                             add_section = false;
1582                         }
1583                     }
1584                     load_cmd.vmaddr = m_data.GetAddress(&offset);
1585                     load_cmd.vmsize = m_data.GetAddress(&offset);
1586                     load_cmd.fileoff = m_data.GetAddress(&offset);
1587                     load_cmd.filesize = m_data.GetAddress(&offset);
1588                     if (m_length != 0 && load_cmd.filesize != 0)
1589                     {
1590                         if (load_cmd.fileoff > m_length)
1591                         {
1592                             // We have a load command that says it extends past the end of the file.  This is likely
1593                             // a corrupt file.  We don't have any way to return an error condition here (this method
1594                             // was likely invoked from something like ObjectFile::GetSectionList()) -- all we can do
1595                             // is null out the SectionList vector and if a process has been set up, dump a message
1596                             // to stdout.  The most common case here is core file debugging with a truncated file.
1597                             const char *lc_segment_name = load_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT";
1598                             module_sp->ReportWarning("load command %u %s has a fileoff (0x%" PRIx64 ") that extends beyond the end of the file (0x%" PRIx64 "), ignoring this section",
1599                                                    i,
1600                                                    lc_segment_name,
1601                                                    load_cmd.fileoff,
1602                                                    m_length);
1603
1604                             load_cmd.fileoff = 0;
1605                             load_cmd.filesize = 0;
1606                         }
1607
1608                         if (load_cmd.fileoff + load_cmd.filesize > m_length)
1609                         {
1610                             // We have a load command that says it extends past the end of the file.  This is likely
1611                             // a corrupt file.  We don't have any way to return an error condition here (this method
1612                             // was likely invoked from something like ObjectFile::GetSectionList()) -- all we can do
1613                             // is null out the SectionList vector and if a process has been set up, dump a message
1614                             // to stdout.  The most common case here is core file debugging with a truncated file.
1615                             const char *lc_segment_name = load_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT";
1616                             GetModule()->ReportWarning("load command %u %s has a fileoff + filesize (0x%" PRIx64 ") that extends beyond the end of the file (0x%" PRIx64 "), the segment will be truncated to match",
1617                                                      i,
1618                                                      lc_segment_name,
1619                                                      load_cmd.fileoff + load_cmd.filesize,
1620                                                      m_length);
1621
1622                             // Tuncase the length
1623                             load_cmd.filesize = m_length - load_cmd.fileoff;
1624                         }
1625                     }
1626                     if (m_data.GetU32(&offset, &load_cmd.maxprot, 4))
1627                     {
1628                         const uint32_t segment_permissions =
1629                             ((load_cmd.initprot & VM_PROT_READ) ? ePermissionsReadable : 0) |
1630                             ((load_cmd.initprot & VM_PROT_WRITE) ? ePermissionsWritable : 0) |
1631                             ((load_cmd.initprot & VM_PROT_EXECUTE) ? ePermissionsExecutable : 0);
1632
1633                         const bool segment_is_encrypted = (load_cmd.flags & SG_PROTECTED_VERSION_1) != 0;
1634
1635                         // Keep a list of mach segments around in case we need to
1636                         // get at data that isn't stored in the abstracted Sections.
1637                         m_mach_segments.push_back (load_cmd);
1638
1639                         // Use a segment ID of the segment index shifted left by 8 so they
1640                         // never conflict with any of the sections.
1641                         SectionSP segment_sp;
1642                         if (add_section && (const_segname || is_core))
1643                         {
1644                             segment_sp.reset(new Section (module_sp,              // Module to which this section belongs
1645                                                           this,                   // Object file to which this sections belongs
1646                                                           ++segID << 8,           // Section ID is the 1 based segment index shifted right by 8 bits as not to collide with any of the 256 section IDs that are possible
1647                                                           const_segname,          // Name of this section
1648                                                           eSectionTypeContainer,  // This section is a container of other sections.
1649                                                           load_cmd.vmaddr,        // File VM address == addresses as they are found in the object file
1650                                                           load_cmd.vmsize,        // VM size in bytes of this section
1651                                                           load_cmd.fileoff,       // Offset to the data for this section in the file
1652                                                           load_cmd.filesize,      // Size in bytes of this section as found in the file
1653                                                           0,                      // Segments have no alignment information
1654                                                           load_cmd.flags));       // Flags for this section
1655
1656                             segment_sp->SetIsEncrypted (segment_is_encrypted);
1657                             m_sections_ap->AddSection(segment_sp);
1658                             segment_sp->SetPermissions(segment_permissions);
1659                             if (add_to_unified)
1660                                 unified_section_list.AddSection(segment_sp);
1661                         }
1662                         else if (unified_section_sp)
1663                         {
1664                             if (is_dsym && unified_section_sp->GetFileAddress() != load_cmd.vmaddr)
1665                             {
1666                                 // Check to see if the module was read from memory?
1667                                 if (module_sp->GetObjectFile()->GetHeaderAddress().IsValid())
1668                                 {
1669                                     // We have a module that is in memory and needs to have its
1670                                     // file address adjusted. We need to do this because when we
1671                                     // load a file from memory, its addresses will be slid already,
1672                                     // yet the addresses in the new symbol file will still be unslid.
1673                                     // Since everything is stored as section offset, this shouldn't
1674                                     // cause any problems.
1675
1676                                     // Make sure we've parsed the symbol table from the
1677                                     // ObjectFile before we go around changing its Sections.
1678                                     module_sp->GetObjectFile()->GetSymtab();
1679                                     // eh_frame would present the same problems but we parse that on
1680                                     // a per-function basis as-needed so it's more difficult to
1681                                     // remove its use of the Sections.  Realistically, the environments
1682                                     // where this code path will be taken will not have eh_frame sections.
1683
1684                                     unified_section_sp->SetFileAddress(load_cmd.vmaddr);
1685
1686                                     // Notify the module that the section addresses have been changed once
1687                                     // we're done so any file-address caches can be updated.
1688                                     section_file_addresses_changed = true;
1689                                 }
1690                             }
1691                             m_sections_ap->AddSection(unified_section_sp);
1692                         }
1693
1694                         struct section_64 sect64;
1695                         ::memset (&sect64, 0, sizeof(sect64));
1696                         // Push a section into our mach sections for the section at
1697                         // index zero (NO_SECT) if we don't have any mach sections yet...
1698                         if (m_mach_sections.empty())
1699                             m_mach_sections.push_back(sect64);
1700                         uint32_t segment_sect_idx;
1701                         const lldb::user_id_t first_segment_sectID = sectID + 1;
1702
1703
1704                         const uint32_t num_u32s = load_cmd.cmd == LC_SEGMENT ? 7 : 8;
1705                         for (segment_sect_idx=0; segment_sect_idx<load_cmd.nsects; ++segment_sect_idx)
1706                         {
1707                             if (m_data.GetU8(&offset, (uint8_t*)sect64.sectname, sizeof(sect64.sectname)) == NULL)
1708                                 break;
1709                             if (m_data.GetU8(&offset, (uint8_t*)sect64.segname, sizeof(sect64.segname)) == NULL)
1710                                 break;
1711                             sect64.addr = m_data.GetAddress(&offset);
1712                             sect64.size = m_data.GetAddress(&offset);
1713
1714                             if (m_data.GetU32(&offset, &sect64.offset, num_u32s) == NULL)
1715                                 break;
1716
1717                             // Keep a list of mach sections around in case we need to
1718                             // get at data that isn't stored in the abstracted Sections.
1719                             m_mach_sections.push_back (sect64);
1720
1721                             if (add_section)
1722                             {
1723                                 ConstString section_name (sect64.sectname, std::min<size_t>(strlen(sect64.sectname), sizeof(sect64.sectname)));
1724                                 if (!const_segname)
1725                                 {
1726                                     // We have a segment with no name so we need to conjure up
1727                                     // segments that correspond to the section's segname if there
1728                                     // isn't already such a section. If there is such a section,
1729                                     // we resize the section so that it spans all sections.
1730                                     // We also mark these sections as fake so address matches don't
1731                                     // hit if they land in the gaps between the child sections.
1732                                     const_segname.SetTrimmedCStringWithLength(sect64.segname, sizeof(sect64.segname));
1733                                     segment_sp = unified_section_list.FindSectionByName (const_segname);
1734                                     if (segment_sp.get())
1735                                     {
1736                                         Section *segment = segment_sp.get();
1737                                         // Grow the section size as needed.
1738                                         const lldb::addr_t sect64_min_addr = sect64.addr;
1739                                         const lldb::addr_t sect64_max_addr = sect64_min_addr + sect64.size;
1740                                         const lldb::addr_t curr_seg_byte_size = segment->GetByteSize();
1741                                         const lldb::addr_t curr_seg_min_addr = segment->GetFileAddress();
1742                                         const lldb::addr_t curr_seg_max_addr = curr_seg_min_addr + curr_seg_byte_size;
1743                                         if (sect64_min_addr >= curr_seg_min_addr)
1744                                         {
1745                                             const lldb::addr_t new_seg_byte_size = sect64_max_addr - curr_seg_min_addr;
1746                                             // Only grow the section size if needed
1747                                             if (new_seg_byte_size > curr_seg_byte_size)
1748                                                 segment->SetByteSize (new_seg_byte_size);
1749                                         }
1750                                         else
1751                                         {
1752                                             // We need to change the base address of the segment and
1753                                             // adjust the child section offsets for all existing children.
1754                                             const lldb::addr_t slide_amount = sect64_min_addr - curr_seg_min_addr;
1755                                             segment->Slide(slide_amount, false);
1756                                             segment->GetChildren().Slide(-slide_amount, false);
1757                                             segment->SetByteSize (curr_seg_max_addr - sect64_min_addr);
1758                                         }
1759
1760                                         // Grow the section size as needed.
1761                                         if (sect64.offset)
1762                                         {
1763                                             const lldb::addr_t segment_min_file_offset = segment->GetFileOffset();
1764                                             const lldb::addr_t segment_max_file_offset = segment_min_file_offset + segment->GetFileSize();
1765
1766                                             const lldb::addr_t section_min_file_offset = sect64.offset;
1767                                             const lldb::addr_t section_max_file_offset = section_min_file_offset + sect64.size;
1768                                             const lldb::addr_t new_file_offset = std::min (section_min_file_offset, segment_min_file_offset);
1769                                             const lldb::addr_t new_file_size = std::max (section_max_file_offset, segment_max_file_offset) - new_file_offset;
1770                                             segment->SetFileOffset (new_file_offset);
1771                                             segment->SetFileSize (new_file_size);
1772                                         }
1773                                     }
1774                                     else
1775                                     {
1776                                         // Create a fake section for the section's named segment
1777                                         segment_sp.reset(new Section (segment_sp,            // Parent section
1778                                                                       module_sp,             // Module to which this section belongs
1779                                                                       this,                  // Object file to which this section belongs
1780                                                                       ++segID << 8,          // Section ID is the 1 based segment index shifted right by 8 bits as not to collide with any of the 256 section IDs that are possible
1781                                                                       const_segname,         // Name of this section
1782                                                                       eSectionTypeContainer, // This section is a container of other sections.
1783                                                                       sect64.addr,           // File VM address == addresses as they are found in the object file
1784                                                                       sect64.size,           // VM size in bytes of this section
1785                                                                       sect64.offset,         // Offset to the data for this section in the file
1786                                                                       sect64.offset ? sect64.size : 0,        // Size in bytes of this section as found in the file
1787                                                                       sect64.align,
1788                                                                       load_cmd.flags));      // Flags for this section
1789                                         segment_sp->SetIsFake(true);
1790                                         segment_sp->SetPermissions(segment_permissions);
1791                                         m_sections_ap->AddSection(segment_sp);
1792                                         if (add_to_unified)
1793                                             unified_section_list.AddSection(segment_sp);
1794                                         segment_sp->SetIsEncrypted (segment_is_encrypted);
1795                                     }
1796                                 }
1797                                 assert (segment_sp.get());
1798
1799                                 lldb::SectionType sect_type = eSectionTypeOther;
1800
1801                                 if (sect64.flags & (S_ATTR_PURE_INSTRUCTIONS | S_ATTR_SOME_INSTRUCTIONS))
1802                                     sect_type = eSectionTypeCode;
1803                                 else
1804                                 {
1805                                     uint32_t mach_sect_type = sect64.flags & SECTION_TYPE;
1806                                     static ConstString g_sect_name_objc_data ("__objc_data");
1807                                     static ConstString g_sect_name_objc_msgrefs ("__objc_msgrefs");
1808                                     static ConstString g_sect_name_objc_selrefs ("__objc_selrefs");
1809                                     static ConstString g_sect_name_objc_classrefs ("__objc_classrefs");
1810                                     static ConstString g_sect_name_objc_superrefs ("__objc_superrefs");
1811                                     static ConstString g_sect_name_objc_const ("__objc_const");
1812                                     static ConstString g_sect_name_objc_classlist ("__objc_classlist");
1813                                     static ConstString g_sect_name_cfstring ("__cfstring");
1814
1815                                     static ConstString g_sect_name_dwarf_debug_abbrev ("__debug_abbrev");
1816                                     static ConstString g_sect_name_dwarf_debug_aranges ("__debug_aranges");
1817                                     static ConstString g_sect_name_dwarf_debug_frame ("__debug_frame");
1818                                     static ConstString g_sect_name_dwarf_debug_info ("__debug_info");
1819                                     static ConstString g_sect_name_dwarf_debug_line ("__debug_line");
1820                                     static ConstString g_sect_name_dwarf_debug_loc ("__debug_loc");
1821                                     static ConstString g_sect_name_dwarf_debug_macinfo ("__debug_macinfo");
1822                                     static ConstString g_sect_name_dwarf_debug_pubnames ("__debug_pubnames");
1823                                     static ConstString g_sect_name_dwarf_debug_pubtypes ("__debug_pubtypes");
1824                                     static ConstString g_sect_name_dwarf_debug_ranges ("__debug_ranges");
1825                                     static ConstString g_sect_name_dwarf_debug_str ("__debug_str");
1826                                     static ConstString g_sect_name_dwarf_apple_names ("__apple_names");
1827                                     static ConstString g_sect_name_dwarf_apple_types ("__apple_types");
1828                                     static ConstString g_sect_name_dwarf_apple_namespaces ("__apple_namespac");
1829                                     static ConstString g_sect_name_dwarf_apple_objc ("__apple_objc");
1830                                     static ConstString g_sect_name_eh_frame ("__eh_frame");
1831                                     static ConstString g_sect_name_compact_unwind ("__unwind_info");
1832                                     static ConstString g_sect_name_text ("__text");
1833                                     static ConstString g_sect_name_data ("__data");
1834                                     static ConstString g_sect_name_go_symtab ("__gosymtab");
1835
1836                                     if (section_name == g_sect_name_dwarf_debug_abbrev)
1837                                         sect_type = eSectionTypeDWARFDebugAbbrev;
1838                                     else if (section_name == g_sect_name_dwarf_debug_aranges)
1839                                         sect_type = eSectionTypeDWARFDebugAranges;
1840                                     else if (section_name == g_sect_name_dwarf_debug_frame)
1841                                         sect_type = eSectionTypeDWARFDebugFrame;
1842                                     else if (section_name == g_sect_name_dwarf_debug_info)
1843                                         sect_type = eSectionTypeDWARFDebugInfo;
1844                                     else if (section_name == g_sect_name_dwarf_debug_line)
1845                                         sect_type = eSectionTypeDWARFDebugLine;
1846                                     else if (section_name == g_sect_name_dwarf_debug_loc)
1847                                         sect_type = eSectionTypeDWARFDebugLoc;
1848                                     else if (section_name == g_sect_name_dwarf_debug_macinfo)
1849                                         sect_type = eSectionTypeDWARFDebugMacInfo;
1850                                     else if (section_name == g_sect_name_dwarf_debug_pubnames)
1851                                         sect_type = eSectionTypeDWARFDebugPubNames;
1852                                     else if (section_name == g_sect_name_dwarf_debug_pubtypes)
1853                                         sect_type = eSectionTypeDWARFDebugPubTypes;
1854                                     else if (section_name == g_sect_name_dwarf_debug_ranges)
1855                                         sect_type = eSectionTypeDWARFDebugRanges;
1856                                     else if (section_name == g_sect_name_dwarf_debug_str)
1857                                         sect_type = eSectionTypeDWARFDebugStr;
1858                                     else if (section_name == g_sect_name_dwarf_apple_names)
1859                                         sect_type = eSectionTypeDWARFAppleNames;
1860                                     else if (section_name == g_sect_name_dwarf_apple_types)
1861                                         sect_type = eSectionTypeDWARFAppleTypes;
1862                                     else if (section_name == g_sect_name_dwarf_apple_namespaces)
1863                                         sect_type = eSectionTypeDWARFAppleNamespaces;
1864                                     else if (section_name == g_sect_name_dwarf_apple_objc)
1865                                         sect_type = eSectionTypeDWARFAppleObjC;
1866                                     else if (section_name == g_sect_name_objc_selrefs)
1867                                         sect_type = eSectionTypeDataCStringPointers;
1868                                     else if (section_name == g_sect_name_objc_msgrefs)
1869                                         sect_type = eSectionTypeDataObjCMessageRefs;
1870                                     else if (section_name == g_sect_name_eh_frame)
1871                                         sect_type = eSectionTypeEHFrame;
1872                                     else if (section_name == g_sect_name_compact_unwind)
1873                                         sect_type = eSectionTypeCompactUnwind;
1874                                     else if (section_name == g_sect_name_cfstring)
1875                                         sect_type = eSectionTypeDataObjCCFStrings;
1876                                     else if (section_name == g_sect_name_go_symtab)
1877                                         sect_type = eSectionTypeGoSymtab;
1878                                     else if (section_name == g_sect_name_objc_data ||
1879                                              section_name == g_sect_name_objc_classrefs ||
1880                                              section_name == g_sect_name_objc_superrefs ||
1881                                              section_name == g_sect_name_objc_const ||
1882                                              section_name == g_sect_name_objc_classlist)
1883                                     {
1884                                         sect_type = eSectionTypeDataPointers;
1885                                     }
1886
1887                                     if (sect_type == eSectionTypeOther)
1888                                     {
1889                                         switch (mach_sect_type)
1890                                         {
1891                                         // TODO: categorize sections by other flags for regular sections
1892                                         case S_REGULAR:
1893                                             if (section_name == g_sect_name_text)
1894                                                 sect_type = eSectionTypeCode;
1895                                             else if (section_name == g_sect_name_data)
1896                                                 sect_type = eSectionTypeData;
1897                                             else
1898                                                 sect_type = eSectionTypeOther;
1899                                             break;
1900                                         case S_ZEROFILL:                   sect_type = eSectionTypeZeroFill; break;
1901                                         case S_CSTRING_LITERALS:           sect_type = eSectionTypeDataCString;    break; // section with only literal C strings
1902                                         case S_4BYTE_LITERALS:             sect_type = eSectionTypeData4;    break; // section with only 4 byte literals
1903                                         case S_8BYTE_LITERALS:             sect_type = eSectionTypeData8;    break; // section with only 8 byte literals
1904                                         case S_LITERAL_POINTERS:           sect_type = eSectionTypeDataPointers;  break; // section with only pointers to literals
1905                                         case S_NON_LAZY_SYMBOL_POINTERS:   sect_type = eSectionTypeDataPointers;  break; // section with only non-lazy symbol pointers
1906                                         case S_LAZY_SYMBOL_POINTERS:       sect_type = eSectionTypeDataPointers;  break; // section with only lazy symbol pointers
1907                                         case S_SYMBOL_STUBS:               sect_type = eSectionTypeCode;  break; // section with only symbol stubs, byte size of stub in the reserved2 field
1908                                         case S_MOD_INIT_FUNC_POINTERS:     sect_type = eSectionTypeDataPointers;    break; // section with only function pointers for initialization
1909                                         case S_MOD_TERM_FUNC_POINTERS:     sect_type = eSectionTypeDataPointers; break; // section with only function pointers for termination
1910                                         case S_COALESCED:                  sect_type = eSectionTypeOther; break;
1911                                         case S_GB_ZEROFILL:                sect_type = eSectionTypeZeroFill; break;
1912                                         case S_INTERPOSING:                sect_type = eSectionTypeCode;  break; // section with only pairs of function pointers for interposing
1913                                         case S_16BYTE_LITERALS:            sect_type = eSectionTypeData16; break; // section with only 16 byte literals
1914                                         case S_DTRACE_DOF:                 sect_type = eSectionTypeDebug; break;
1915                                         case S_LAZY_DYLIB_SYMBOL_POINTERS: sect_type = eSectionTypeDataPointers;  break;
1916                                         default: break;
1917                                         }
1918                                     }
1919                                 }
1920
1921                                 SectionSP section_sp(new Section (segment_sp,
1922                                                                   module_sp,
1923                                                                   this,
1924                                                                   ++sectID,
1925                                                                   section_name,
1926                                                                   sect_type,
1927                                                                   sect64.addr - segment_sp->GetFileAddress(),
1928                                                                   sect64.size,
1929                                                                   sect64.offset,
1930                                                                   sect64.offset == 0 ? 0 : sect64.size,
1931                                                                   sect64.align,
1932                                                                   sect64.flags));
1933                                 // Set the section to be encrypted to match the segment
1934
1935                                 bool section_is_encrypted = false;
1936                                 if (!segment_is_encrypted && load_cmd.filesize != 0)
1937                                     section_is_encrypted = encrypted_file_ranges.FindEntryThatContains(sect64.offset) != NULL;
1938
1939                                 section_sp->SetIsEncrypted (segment_is_encrypted || section_is_encrypted);
1940                                 section_sp->SetPermissions(segment_permissions);
1941                                 segment_sp->GetChildren().AddSection(section_sp);
1942
1943                                 if (segment_sp->IsFake())
1944                                 {
1945                                     segment_sp.reset();
1946                                     const_segname.Clear();
1947                                 }
1948                             }
1949                         }
1950                         if (segment_sp && is_dsym)
1951                         {
1952                             if (first_segment_sectID <= sectID)
1953                             {
1954                                 lldb::user_id_t sect_uid;
1955                                 for (sect_uid = first_segment_sectID; sect_uid <= sectID; ++sect_uid)
1956                                 {
1957                                     SectionSP curr_section_sp(segment_sp->GetChildren().FindSectionByID (sect_uid));
1958                                     SectionSP next_section_sp;
1959                                     if (sect_uid + 1 <= sectID)
1960                                         next_section_sp = segment_sp->GetChildren().FindSectionByID (sect_uid+1);
1961
1962                                     if (curr_section_sp.get())
1963                                     {
1964                                         if (curr_section_sp->GetByteSize() == 0)
1965                                         {
1966                                             if (next_section_sp.get() != NULL)
1967                                                 curr_section_sp->SetByteSize ( next_section_sp->GetFileAddress() - curr_section_sp->GetFileAddress() );
1968                                             else
1969                                                 curr_section_sp->SetByteSize ( load_cmd.vmsize );
1970                                         }
1971                                     }
1972                                 }
1973                             }
1974                         }
1975                     }
1976                 }
1977             }
1978             else if (load_cmd.cmd == LC_DYSYMTAB)
1979             {
1980                 m_dysymtab.cmd = load_cmd.cmd;
1981                 m_dysymtab.cmdsize = load_cmd.cmdsize;
1982                 m_data.GetU32 (&offset, &m_dysymtab.ilocalsym, (sizeof(m_dysymtab) / sizeof(uint32_t)) - 2);
1983             }
1984
1985             offset = load_cmd_offset + load_cmd.cmdsize;
1986         }
1987
1988
1989         if (section_file_addresses_changed && module_sp.get())
1990         {
1991             module_sp->SectionFileAddressesChanged();
1992         }
1993     }
1994 }
1995
1996 class MachSymtabSectionInfo
1997 {
1998 public:
1999     MachSymtabSectionInfo (SectionList *section_list) :
2000         m_section_list (section_list),
2001         m_section_infos()
2002     {
2003         // Get the number of sections down to a depth of 1 to include
2004         // all segments and their sections, but no other sections that
2005         // may be added for debug map or
2006         m_section_infos.resize(section_list->GetNumSections(1));
2007     }
2008
2009     SectionSP
2010     GetSection (uint8_t n_sect, addr_t file_addr)
2011     {
2012         if (n_sect == 0)
2013             return SectionSP();
2014         if (n_sect < m_section_infos.size())
2015         {
2016             if (!m_section_infos[n_sect].section_sp)
2017             {
2018                 SectionSP section_sp (m_section_list->FindSectionByID (n_sect));
2019                 m_section_infos[n_sect].section_sp = section_sp;
2020                 if (section_sp)
2021                 {
2022                     m_section_infos[n_sect].vm_range.SetBaseAddress (section_sp->GetFileAddress());
2023                     m_section_infos[n_sect].vm_range.SetByteSize (section_sp->GetByteSize());
2024                 }
2025                 else
2026                 {
2027                     Host::SystemLog (Host::eSystemLogError, "error: unable to find section for section %u\n", n_sect);
2028                 }
2029             }
2030             if (m_section_infos[n_sect].vm_range.Contains(file_addr))
2031             {
2032                 // Symbol is in section.
2033                 return m_section_infos[n_sect].section_sp;
2034             }
2035             else if (m_section_infos[n_sect].vm_range.GetByteSize () == 0 &&
2036                      m_section_infos[n_sect].vm_range.GetBaseAddress() == file_addr)
2037             {
2038                 // Symbol is in section with zero size, but has the same start
2039                 // address as the section. This can happen with linker symbols
2040                 // (symbols that start with the letter 'l' or 'L'.
2041                 return m_section_infos[n_sect].section_sp;
2042             }
2043         }
2044         return m_section_list->FindSectionContainingFileAddress(file_addr);
2045     }
2046
2047 protected:
2048     struct SectionInfo
2049     {
2050         SectionInfo () :
2051             vm_range(),
2052             section_sp ()
2053         {
2054         }
2055
2056         VMRange vm_range;
2057         SectionSP section_sp;
2058     };
2059     SectionList *m_section_list;
2060     std::vector<SectionInfo> m_section_infos;
2061 };
2062
2063 struct TrieEntry
2064 {
2065     TrieEntry () :
2066         name(),
2067         address(LLDB_INVALID_ADDRESS),
2068         flags (0),
2069         other(0),
2070         import_name()
2071     {
2072     }
2073
2074     void
2075     Clear ()
2076     {
2077         name.Clear();
2078         address = LLDB_INVALID_ADDRESS;
2079         flags = 0;
2080         other = 0;
2081         import_name.Clear();
2082     }
2083
2084     void
2085     Dump () const
2086     {
2087         printf ("0x%16.16llx 0x%16.16llx 0x%16.16llx \"%s\"",
2088                 static_cast<unsigned long long>(address),
2089                 static_cast<unsigned long long>(flags),
2090                 static_cast<unsigned long long>(other), name.GetCString());
2091         if (import_name)
2092             printf (" -> \"%s\"\n", import_name.GetCString());
2093         else
2094             printf ("\n");
2095     }
2096     ConstString         name;
2097     uint64_t            address;
2098     uint64_t            flags;
2099     uint64_t            other;
2100     ConstString         import_name;
2101 };
2102
2103 struct TrieEntryWithOffset
2104 {
2105         lldb::offset_t nodeOffset;
2106         TrieEntry entry;
2107
2108     TrieEntryWithOffset (lldb::offset_t offset) :
2109         nodeOffset (offset),
2110         entry()
2111     {
2112     }
2113
2114     void
2115     Dump (uint32_t idx) const
2116     {
2117         printf ("[%3u] 0x%16.16llx: ", idx,
2118                 static_cast<unsigned long long>(nodeOffset));
2119         entry.Dump();
2120     }
2121
2122         bool
2123     operator<(const TrieEntryWithOffset& other) const
2124     {
2125         return ( nodeOffset < other.nodeOffset );
2126     }
2127 };
2128
2129 static bool
2130 ParseTrieEntries (DataExtractor &data,
2131                   lldb::offset_t offset,
2132                   const bool is_arm,
2133                   std::vector<llvm::StringRef> &nameSlices,
2134                   std::set<lldb::addr_t> &resolver_addresses,
2135                   std::vector<TrieEntryWithOffset>& output)
2136 {
2137         if (!data.ValidOffset(offset))
2138         return true;
2139
2140         const uint64_t terminalSize = data.GetULEB128(&offset);
2141         lldb::offset_t children_offset = offset + terminalSize;
2142         if ( terminalSize != 0 ) {
2143                 TrieEntryWithOffset e (offset);
2144                 e.entry.flags = data.GetULEB128(&offset);
2145         const char *import_name = NULL;
2146                 if ( e.entry.flags & EXPORT_SYMBOL_FLAGS_REEXPORT ) {
2147                         e.entry.address = 0;
2148                         e.entry.other = data.GetULEB128(&offset); // dylib ordinal
2149             import_name = data.GetCStr(&offset);
2150                 }
2151                 else {
2152                         e.entry.address = data.GetULEB128(&offset);
2153                         if ( e.entry.flags & EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER )
2154             {
2155                                 e.entry.other = data.GetULEB128(&offset);
2156                 uint64_t resolver_addr = e.entry.other;
2157                 if (is_arm)
2158                     resolver_addr &= THUMB_ADDRESS_BIT_MASK;
2159                 resolver_addresses.insert(resolver_addr);
2160             }
2161                         else
2162                                 e.entry.other = 0;
2163                 }
2164         // Only add symbols that are reexport symbols with a valid import name
2165         if (EXPORT_SYMBOL_FLAGS_REEXPORT & e.entry.flags && import_name && import_name[0])
2166         {
2167             std::string name;
2168             if (!nameSlices.empty())
2169             {
2170                 for (auto name_slice: nameSlices)
2171                     name.append(name_slice.data(), name_slice.size());
2172             }
2173             if (name.size() > 1)
2174             {
2175                 // Skip the leading '_'
2176                 e.entry.name.SetCStringWithLength(name.c_str() + 1,name.size() - 1);
2177             }
2178             if (import_name)
2179             {
2180                 // Skip the leading '_'
2181                 e.entry.import_name.SetCString(import_name+1);
2182             }
2183             output.push_back(e);
2184         }
2185         }
2186
2187         const uint8_t childrenCount = data.GetU8(&children_offset);
2188         for (uint8_t i=0; i < childrenCount; ++i) {
2189         const char *cstr = data.GetCStr(&children_offset);
2190         if (cstr)
2191             nameSlices.push_back(llvm::StringRef(cstr));
2192         else
2193             return false; // Corrupt data
2194         lldb::offset_t childNodeOffset = data.GetULEB128(&children_offset);
2195                 if (childNodeOffset)
2196         {
2197             if (!ParseTrieEntries(data,
2198                                  childNodeOffset,
2199                                  is_arm,
2200                                  nameSlices,
2201                                  resolver_addresses,
2202                                  output))
2203             {
2204                 return false;
2205             }
2206         }
2207         nameSlices.pop_back();
2208         }
2209     return true;
2210 }
2211
2212 // Read the UUID out of a dyld_shared_cache file on-disk.
2213 UUID
2214 ObjectFileMachO::GetSharedCacheUUID (FileSpec dyld_shared_cache, const ByteOrder byte_order, const uint32_t addr_byte_size)
2215 {
2216     UUID dsc_uuid;
2217     DataBufferSP dsc_data_sp = dyld_shared_cache.MemoryMapFileContentsIfLocal(0, sizeof(struct lldb_copy_dyld_cache_header_v1));
2218     if (dsc_data_sp)
2219     {
2220         DataExtractor dsc_header_data (dsc_data_sp, byte_order, addr_byte_size);
2221
2222         char version_str[7];
2223         lldb::offset_t offset = 0;
2224         memcpy (version_str, dsc_header_data.GetData (&offset, 6), 6);
2225         version_str[6] = '\0';
2226         if (strcmp (version_str, "dyld_v") == 0)
2227         {
2228             offset = offsetof (struct lldb_copy_dyld_cache_header_v1, uuid);
2229             uint8_t uuid_bytes[sizeof (uuid_t)];
2230             memcpy (uuid_bytes, dsc_header_data.GetData (&offset, sizeof (uuid_t)), sizeof (uuid_t));
2231             dsc_uuid.SetBytes (uuid_bytes);
2232         }
2233     }
2234     return dsc_uuid;
2235 }
2236
2237 size_t
2238 ObjectFileMachO::ParseSymtab ()
2239 {
2240     Timer scoped_timer(__PRETTY_FUNCTION__,
2241                        "ObjectFileMachO::ParseSymtab () module = %s",
2242                        m_file.GetFilename().AsCString(""));
2243     ModuleSP module_sp (GetModule());
2244     if (!module_sp)
2245         return 0;
2246
2247     struct symtab_command symtab_load_command = { 0, 0, 0, 0, 0, 0 };
2248     struct linkedit_data_command function_starts_load_command = { 0, 0, 0, 0 };
2249     struct dyld_info_command dyld_info = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
2250     typedef AddressDataArray<lldb::addr_t, bool, 100> FunctionStarts;
2251     FunctionStarts function_starts;
2252     lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
2253     uint32_t i;
2254     FileSpecList dylib_files;
2255     Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SYMBOLS));
2256     static const llvm::StringRef g_objc_v2_prefix_class ("_OBJC_CLASS_$_");
2257     static const llvm::StringRef g_objc_v2_prefix_metaclass ("_OBJC_METACLASS_$_");
2258     static const llvm::StringRef g_objc_v2_prefix_ivar ("_OBJC_IVAR_$_");
2259
2260     for (i=0; i<m_header.ncmds; ++i)
2261     {
2262         const lldb::offset_t cmd_offset = offset;
2263         // Read in the load command and load command size
2264         struct load_command lc;
2265         if (m_data.GetU32(&offset, &lc, 2) == NULL)
2266             break;
2267         // Watch for the symbol table load command
2268         switch (lc.cmd)
2269         {
2270         case LC_SYMTAB:
2271             symtab_load_command.cmd = lc.cmd;
2272             symtab_load_command.cmdsize = lc.cmdsize;
2273             // Read in the rest of the symtab load command
2274             if (m_data.GetU32(&offset, &symtab_load_command.symoff, 4) == 0) // fill in symoff, nsyms, stroff, strsize fields
2275                 return 0;
2276             if (symtab_load_command.symoff == 0)
2277             {
2278                 if (log)
2279                     module_sp->LogMessage(log, "LC_SYMTAB.symoff == 0");
2280                 return 0;
2281             }
2282
2283             if (symtab_load_command.stroff == 0)
2284             {
2285                 if (log)
2286                     module_sp->LogMessage(log, "LC_SYMTAB.stroff == 0");
2287                 return 0;
2288             }
2289
2290             if (symtab_load_command.nsyms == 0)
2291             {
2292                 if (log)
2293                     module_sp->LogMessage(log, "LC_SYMTAB.nsyms == 0");
2294                 return 0;
2295             }
2296
2297             if (symtab_load_command.strsize == 0)
2298             {
2299                 if (log)
2300                     module_sp->LogMessage(log, "LC_SYMTAB.strsize == 0");
2301                 return 0;
2302             }
2303             break;
2304
2305         case LC_DYLD_INFO:
2306         case LC_DYLD_INFO_ONLY:
2307             if (m_data.GetU32(&offset, &dyld_info.rebase_off, 10))
2308             {
2309                 dyld_info.cmd = lc.cmd;
2310                 dyld_info.cmdsize = lc.cmdsize;
2311             }
2312             else
2313             {
2314                 memset (&dyld_info, 0, sizeof(dyld_info));
2315             }
2316             break;
2317
2318         case LC_LOAD_DYLIB:
2319         case LC_LOAD_WEAK_DYLIB:
2320         case LC_REEXPORT_DYLIB:
2321         case LC_LOADFVMLIB:
2322         case LC_LOAD_UPWARD_DYLIB:
2323             {
2324                 uint32_t name_offset = cmd_offset + m_data.GetU32(&offset);
2325                 const char *path = m_data.PeekCStr(name_offset);
2326                 if (path)
2327                 {
2328                     FileSpec file_spec(path, false);
2329                     // Strip the path if there is @rpath, @executable, etc so we just use the basename
2330                     if (path[0] == '@')
2331                         file_spec.GetDirectory().Clear();
2332
2333                     if (lc.cmd == LC_REEXPORT_DYLIB)
2334                     {
2335                         m_reexported_dylibs.AppendIfUnique(file_spec);
2336                     }
2337
2338                     dylib_files.Append(file_spec);
2339                 }
2340             }
2341             break;
2342
2343         case LC_FUNCTION_STARTS:
2344             function_starts_load_command.cmd = lc.cmd;
2345             function_starts_load_command.cmdsize = lc.cmdsize;
2346             if (m_data.GetU32(&offset, &function_starts_load_command.dataoff, 2) == NULL) // fill in symoff, nsyms, stroff, strsize fields
2347                 memset (&function_starts_load_command, 0, sizeof(function_starts_load_command));
2348             break;
2349
2350         default:
2351             break;
2352         }
2353         offset = cmd_offset + lc.cmdsize;
2354     }
2355
2356     if (symtab_load_command.cmd)
2357     {
2358         Symtab *symtab = m_symtab_ap.get();
2359         SectionList *section_list = GetSectionList();
2360         if (section_list == NULL)
2361             return 0;
2362
2363         const uint32_t addr_byte_size = m_data.GetAddressByteSize();
2364         const ByteOrder byte_order = m_data.GetByteOrder();
2365         bool bit_width_32 = addr_byte_size == 4;
2366         const size_t nlist_byte_size = bit_width_32 ? sizeof(struct nlist) : sizeof(struct nlist_64);
2367
2368         DataExtractor nlist_data (NULL, 0, byte_order, addr_byte_size);
2369         DataExtractor strtab_data (NULL, 0, byte_order, addr_byte_size);
2370         DataExtractor function_starts_data (NULL, 0, byte_order, addr_byte_size);
2371         DataExtractor indirect_symbol_index_data (NULL, 0, byte_order, addr_byte_size);
2372         DataExtractor dyld_trie_data (NULL, 0, byte_order, addr_byte_size);
2373
2374         const addr_t nlist_data_byte_size = symtab_load_command.nsyms * nlist_byte_size;
2375         const addr_t strtab_data_byte_size = symtab_load_command.strsize;
2376         addr_t strtab_addr = LLDB_INVALID_ADDRESS;
2377
2378         ProcessSP process_sp (m_process_wp.lock());
2379         Process *process = process_sp.get();
2380
2381         uint32_t memory_module_load_level = eMemoryModuleLoadLevelComplete;
2382
2383         if (process && m_header.filetype != llvm::MachO::MH_OBJECT)
2384         {
2385             Target &target = process->GetTarget();
2386
2387             memory_module_load_level = target.GetMemoryModuleLoadLevel();
2388
2389             SectionSP linkedit_section_sp(section_list->FindSectionByName(GetSegmentNameLINKEDIT()));
2390             // Reading mach file from memory in a process or core file...
2391
2392             if (linkedit_section_sp)
2393             {
2394                 addr_t linkedit_load_addr = linkedit_section_sp->GetLoadBaseAddress(&target);
2395                 if (linkedit_load_addr == LLDB_INVALID_ADDRESS)
2396                 {
2397                     // We might be trying to access the symbol table before the __LINKEDIT's load
2398                     // address has been set in the target. We can't fail to read the symbol table,
2399                     // so calculate the right address manually
2400                     linkedit_load_addr = CalculateSectionLoadAddressForMemoryImage(m_memory_addr, GetMachHeaderSection(), linkedit_section_sp.get());
2401                 }
2402
2403                 const addr_t linkedit_file_offset = linkedit_section_sp->GetFileOffset();
2404                 const addr_t symoff_addr = linkedit_load_addr + symtab_load_command.symoff - linkedit_file_offset;
2405                 strtab_addr = linkedit_load_addr + symtab_load_command.stroff - linkedit_file_offset;
2406
2407                 bool data_was_read = false;
2408
2409 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__))
2410                 if (m_header.flags & 0x80000000u && process->GetAddressByteSize() == sizeof (void*))
2411                 {
2412                     // This mach-o memory file is in the dyld shared cache. If this
2413                     // program is not remote and this is iOS, then this process will
2414                     // share the same shared cache as the process we are debugging and
2415                     // we can read the entire __LINKEDIT from the address space in this
2416                     // process. This is a needed optimization that is used for local iOS
2417                     // debugging only since all shared libraries in the shared cache do
2418                     // not have corresponding files that exist in the file system of the
2419                     // device. They have been combined into a single file. This means we
2420                     // always have to load these files from memory. All of the symbol and
2421                     // string tables from all of the __LINKEDIT sections from the shared
2422                     // libraries in the shared cache have been merged into a single large
2423                     // symbol and string table. Reading all of this symbol and string table
2424                     // data across can slow down debug launch times, so we optimize this by
2425                     // reading the memory for the __LINKEDIT section from this process.
2426
2427                     UUID lldb_shared_cache(GetLLDBSharedCacheUUID());
2428                     UUID process_shared_cache(GetProcessSharedCacheUUID(process));
2429                     bool use_lldb_cache = true;
2430                     if (lldb_shared_cache.IsValid() && process_shared_cache.IsValid() && lldb_shared_cache != process_shared_cache)
2431                     {
2432                             use_lldb_cache = false;
2433                             ModuleSP module_sp (GetModule());
2434                             if (module_sp)
2435                                 module_sp->ReportWarning ("shared cache in process does not match lldb's own shared cache, startup will be slow.");
2436
2437                     }
2438
2439                     PlatformSP platform_sp (target.GetPlatform());
2440                     if (platform_sp && platform_sp->IsHost() && use_lldb_cache)
2441                     {
2442                         data_was_read = true;
2443                         nlist_data.SetData((void *)symoff_addr, nlist_data_byte_size, eByteOrderLittle);
2444                         strtab_data.SetData((void *)strtab_addr, strtab_data_byte_size, eByteOrderLittle);
2445                         if (function_starts_load_command.cmd)
2446                         {
2447                             const addr_t func_start_addr = linkedit_load_addr + function_starts_load_command.dataoff - linkedit_file_offset;
2448                             function_starts_data.SetData ((void *)func_start_addr, function_starts_load_command.datasize, eByteOrderLittle);
2449                         }
2450                     }
2451                 }
2452 #endif
2453
2454                 if (!data_was_read)
2455                 {
2456                     if (memory_module_load_level == eMemoryModuleLoadLevelComplete)
2457                     {
2458                         DataBufferSP nlist_data_sp (ReadMemory (process_sp, symoff_addr, nlist_data_byte_size));
2459                         if (nlist_data_sp)
2460                             nlist_data.SetData (nlist_data_sp, 0, nlist_data_sp->GetByteSize());
2461                         // Load strings individually from memory when loading from memory since shared cache
2462                         // string tables contain strings for all symbols from all shared cached libraries
2463                         //DataBufferSP strtab_data_sp (ReadMemory (process_sp, strtab_addr, strtab_data_byte_size));
2464                         //if (strtab_data_sp)
2465                         //    strtab_data.SetData (strtab_data_sp, 0, strtab_data_sp->GetByteSize());
2466                         if (m_dysymtab.nindirectsyms != 0)
2467                         {
2468                             const addr_t indirect_syms_addr = linkedit_load_addr + m_dysymtab.indirectsymoff - linkedit_file_offset;
2469                             DataBufferSP indirect_syms_data_sp (ReadMemory (process_sp, indirect_syms_addr, m_dysymtab.nindirectsyms * 4));
2470                             if (indirect_syms_data_sp)
2471                                 indirect_symbol_index_data.SetData (indirect_syms_data_sp, 0, indirect_syms_data_sp->GetByteSize());
2472                         }
2473                     }
2474
2475                     if (memory_module_load_level >= eMemoryModuleLoadLevelPartial)
2476                     {
2477                         if (function_starts_load_command.cmd)
2478                         {
2479                             const addr_t func_start_addr = linkedit_load_addr + function_starts_load_command.dataoff - linkedit_file_offset;
2480                             DataBufferSP func_start_data_sp (ReadMemory (process_sp, func_start_addr, function_starts_load_command.datasize));
2481                             if (func_start_data_sp)
2482                                 function_starts_data.SetData (func_start_data_sp, 0, func_start_data_sp->GetByteSize());
2483                         }
2484                     }
2485                 }
2486             }
2487         }
2488         else
2489         {
2490             nlist_data.SetData (m_data,
2491                                 symtab_load_command.symoff,
2492                                 nlist_data_byte_size);
2493             strtab_data.SetData (m_data,
2494                                  symtab_load_command.stroff,
2495                                  strtab_data_byte_size);
2496
2497             if (dyld_info.export_size > 0)
2498             {
2499                 dyld_trie_data.SetData (m_data,
2500                                         dyld_info.export_off,
2501                                         dyld_info.export_size);
2502             }
2503
2504             if (m_dysymtab.nindirectsyms != 0)
2505             {
2506                 indirect_symbol_index_data.SetData (m_data,
2507                                                     m_dysymtab.indirectsymoff,
2508                                                     m_dysymtab.nindirectsyms * 4);
2509             }
2510             if (function_starts_load_command.cmd)
2511             {
2512                 function_starts_data.SetData (m_data,
2513                                               function_starts_load_command.dataoff,
2514                                               function_starts_load_command.datasize);
2515             }
2516         }
2517
2518         if (nlist_data.GetByteSize() == 0 && memory_module_load_level == eMemoryModuleLoadLevelComplete)
2519         {
2520             if (log)
2521                 module_sp->LogMessage(log, "failed to read nlist data");
2522             return 0;
2523         }
2524
2525         const bool have_strtab_data = strtab_data.GetByteSize() > 0;
2526         if (!have_strtab_data)
2527         {
2528             if (process)
2529             {
2530                 if (strtab_addr == LLDB_INVALID_ADDRESS)
2531                 {
2532                     if (log)
2533                         module_sp->LogMessage(log, "failed to locate the strtab in memory");
2534                     return 0;
2535                 }
2536             }
2537             else
2538             {
2539                 if (log)
2540                     module_sp->LogMessage(log, "failed to read strtab data");
2541                 return 0;
2542             }
2543         }
2544
2545         const ConstString &g_segment_name_TEXT = GetSegmentNameTEXT();
2546         const ConstString &g_segment_name_DATA = GetSegmentNameDATA();
2547         const ConstString &g_segment_name_DATA_DIRTY = GetSegmentNameDATA_DIRTY();
2548         const ConstString &g_segment_name_DATA_CONST = GetSegmentNameDATA_CONST();
2549         const ConstString &g_segment_name_OBJC = GetSegmentNameOBJC();
2550         const ConstString &g_section_name_eh_frame = GetSectionNameEHFrame();
2551         SectionSP text_section_sp(section_list->FindSectionByName(g_segment_name_TEXT));
2552         SectionSP data_section_sp(section_list->FindSectionByName(g_segment_name_DATA));
2553         SectionSP data_dirty_section_sp(section_list->FindSectionByName(g_segment_name_DATA_DIRTY));
2554         SectionSP data_const_section_sp(section_list->FindSectionByName(g_segment_name_DATA_CONST));
2555         SectionSP objc_section_sp(section_list->FindSectionByName(g_segment_name_OBJC));
2556         SectionSP eh_frame_section_sp;
2557         if (text_section_sp.get())
2558             eh_frame_section_sp = text_section_sp->GetChildren().FindSectionByName (g_section_name_eh_frame);
2559         else
2560             eh_frame_section_sp = section_list->FindSectionByName (g_section_name_eh_frame);
2561
2562         const bool is_arm = (m_header.cputype == llvm::MachO::CPU_TYPE_ARM);
2563
2564         // lldb works best if it knows the start address of all functions in a module.
2565         // Linker symbols or debug info are normally the best source of information for start addr / size but
2566         // they may be stripped in a released binary.
2567         // Two additional sources of information exist in Mach-O binaries:
2568         //    LC_FUNCTION_STARTS - a list of ULEB128 encoded offsets of each function's start address in the
2569         //                         binary, relative to the text section.
2570         //    eh_frame           - the eh_frame FDEs have the start addr & size of each function
2571         //  LC_FUNCTION_STARTS is the fastest source to read in, and is present on all modern binaries.
2572         //  Binaries built to run on older releases may need to use eh_frame information.
2573
2574         if (text_section_sp && function_starts_data.GetByteSize())
2575         {
2576             FunctionStarts::Entry function_start_entry;
2577             function_start_entry.data = false;
2578             lldb::offset_t function_start_offset = 0;
2579             function_start_entry.addr = text_section_sp->GetFileAddress();
2580             uint64_t delta;
2581             while ((delta = function_starts_data.GetULEB128(&function_start_offset)) > 0)
2582             {
2583                 // Now append the current entry
2584                 function_start_entry.addr += delta;
2585                 function_starts.Append(function_start_entry);
2586             }
2587         }
2588         else
2589         {
2590             // If m_type is eTypeDebugInfo, then this is a dSYM - it will have the load command claiming an eh_frame
2591             // but it doesn't actually have the eh_frame content.  And if we have a dSYM, we don't need to do any
2592             // of this fill-in-the-missing-symbols works anyway - the debug info should give us all the functions in
2593             // the module.
2594             if (text_section_sp.get() && eh_frame_section_sp.get() && m_type != eTypeDebugInfo)
2595             {
2596                 DWARFCallFrameInfo eh_frame(*this, eh_frame_section_sp, eRegisterKindEHFrame, true);
2597                 DWARFCallFrameInfo::FunctionAddressAndSizeVector functions;
2598                 eh_frame.GetFunctionAddressAndSizeVector (functions);
2599                 addr_t text_base_addr = text_section_sp->GetFileAddress();
2600                 size_t count = functions.GetSize();
2601                 for (size_t i = 0; i < count; ++i)
2602                 {
2603                     const DWARFCallFrameInfo::FunctionAddressAndSizeVector::Entry *func = functions.GetEntryAtIndex (i);
2604                     if (func)
2605                     {
2606                         FunctionStarts::Entry function_start_entry;
2607                         function_start_entry.addr = func->base - text_base_addr;
2608                         function_starts.Append(function_start_entry);
2609                     }
2610                 }
2611             }
2612         }
2613
2614         const size_t function_starts_count = function_starts.GetSize();
2615
2616         // For user process binaries (executables, dylibs, frameworks, bundles), if we don't have
2617         // LC_FUNCTION_STARTS/eh_frame section in this binary, we're going to assume the binary
2618         // has been stripped.  Don't allow assembly language instruction emulation because we don't
2619         // know proper function start boundaries.
2620         //
2621         // For all other types of binaries (kernels, stand-alone bare board binaries, kexts), they
2622         // may not have LC_FUNCTION_STARTS / eh_frame sections - we should not make any assumptions
2623         // about them based on that.
2624         if (function_starts_count == 0 && CalculateStrata() == eStrataUser)
2625         {
2626             m_allow_assembly_emulation_unwind_plans = false;
2627             Log *unwind_or_symbol_log (lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_SYMBOLS | LIBLLDB_LOG_UNWIND));
2628
2629             if (unwind_or_symbol_log)
2630                 module_sp->LogMessage(unwind_or_symbol_log, "no LC_FUNCTION_STARTS, will not allow assembly profiled unwinds");
2631         }
2632
2633         const user_id_t TEXT_eh_frame_sectID =
2634             eh_frame_section_sp.get() ? eh_frame_section_sp->GetID()
2635                                       : static_cast<user_id_t>(NO_SECT);
2636
2637         lldb::offset_t nlist_data_offset = 0;
2638
2639         uint32_t N_SO_index = UINT32_MAX;
2640
2641         MachSymtabSectionInfo section_info (section_list);
2642         std::vector<uint32_t> N_FUN_indexes;
2643         std::vector<uint32_t> N_NSYM_indexes;
2644         std::vector<uint32_t> N_INCL_indexes;
2645         std::vector<uint32_t> N_BRAC_indexes;
2646         std::vector<uint32_t> N_COMM_indexes;
2647         typedef std::multimap <uint64_t, uint32_t> ValueToSymbolIndexMap;
2648         typedef std::map <uint32_t, uint32_t> NListIndexToSymbolIndexMap;
2649         typedef std::map <const char *, uint32_t> ConstNameToSymbolIndexMap;
2650         ValueToSymbolIndexMap N_FUN_addr_to_sym_idx;
2651         ValueToSymbolIndexMap N_STSYM_addr_to_sym_idx;
2652         ConstNameToSymbolIndexMap N_GSYM_name_to_sym_idx;
2653         // Any symbols that get merged into another will get an entry
2654         // in this map so we know
2655         NListIndexToSymbolIndexMap m_nlist_idx_to_sym_idx;
2656         uint32_t nlist_idx = 0;
2657         Symbol *symbol_ptr = NULL;
2658
2659         uint32_t sym_idx = 0;
2660         Symbol *sym = NULL;
2661         size_t num_syms = 0;
2662         std::string memory_symbol_name;
2663         uint32_t unmapped_local_symbols_found = 0;
2664
2665         std::vector<TrieEntryWithOffset> trie_entries;
2666         std::set<lldb::addr_t> resolver_addresses;
2667
2668         if (dyld_trie_data.GetByteSize() > 0)
2669         {
2670             std::vector<llvm::StringRef> nameSlices;
2671             ParseTrieEntries (dyld_trie_data,
2672                               0,
2673                               is_arm,
2674                               nameSlices,
2675                               resolver_addresses,
2676                               trie_entries);
2677
2678             ConstString text_segment_name ("__TEXT");
2679             SectionSP text_segment_sp = GetSectionList()->FindSectionByName(text_segment_name);
2680             if (text_segment_sp)
2681             {
2682                 const lldb::addr_t text_segment_file_addr = text_segment_sp->GetFileAddress();
2683                 if (text_segment_file_addr != LLDB_INVALID_ADDRESS)
2684                 {
2685                     for (auto &e : trie_entries)
2686                         e.entry.address += text_segment_file_addr;
2687                 }
2688             }
2689         }
2690
2691         typedef std::set<ConstString> IndirectSymbols;
2692         IndirectSymbols indirect_symbol_names;
2693
2694 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__))
2695
2696         // Some recent builds of the dyld_shared_cache (hereafter: DSC) have been optimized by moving LOCAL
2697         // symbols out of the memory mapped portion of the DSC. The symbol information has all been retained,
2698         // but it isn't available in the normal nlist data. However, there *are* duplicate entries of *some*
2699         // LOCAL symbols in the normal nlist data. To handle this situation correctly, we must first attempt
2700         // to parse any DSC unmapped symbol information. If we find any, we set a flag that tells the normal
2701         // nlist parser to ignore all LOCAL symbols.
2702
2703         if (m_header.flags & 0x80000000u)
2704         {
2705             // Before we can start mapping the DSC, we need to make certain the target process is actually
2706             // using the cache we can find.
2707
2708             // Next we need to determine the correct path for the dyld shared cache.
2709
2710             ArchSpec header_arch;
2711             GetArchitecture(header_arch);
2712             char dsc_path[PATH_MAX];
2713             char dsc_path_development[PATH_MAX];
2714
2715             snprintf(dsc_path, sizeof(dsc_path), "%s%s%s",
2716                      "/System/Library/Caches/com.apple.dyld/",  /* IPHONE_DYLD_SHARED_CACHE_DIR */
2717                      "dyld_shared_cache_",          /* DYLD_SHARED_CACHE_BASE_NAME */
2718                      header_arch.GetArchitectureName());
2719
2720             snprintf(dsc_path_development, sizeof(dsc_path), "%s%s%s%s",
2721                      "/System/Library/Caches/com.apple.dyld/",  /* IPHONE_DYLD_SHARED_CACHE_DIR */
2722                      "dyld_shared_cache_",          /* DYLD_SHARED_CACHE_BASE_NAME */
2723                      header_arch.GetArchitectureName(),
2724                      ".development");
2725
2726             FileSpec dsc_nondevelopment_filespec(dsc_path, false);
2727             FileSpec dsc_development_filespec(dsc_path_development, false);
2728             FileSpec dsc_filespec;
2729
2730             UUID dsc_uuid;
2731             UUID process_shared_cache_uuid;
2732
2733             if (process)
2734             {
2735                 process_shared_cache_uuid = GetProcessSharedCacheUUID(process);
2736             }
2737
2738             // First see if we can find an exact match for the inferior process shared cache UUID in
2739             // the development or non-development shared caches on disk.
2740             if (process_shared_cache_uuid.IsValid())
2741             {
2742                 if (dsc_development_filespec.Exists())
2743                 {
2744                     UUID dsc_development_uuid = GetSharedCacheUUID (dsc_development_filespec, byte_order, addr_byte_size);
2745                     if (dsc_development_uuid.IsValid() && dsc_development_uuid == process_shared_cache_uuid)
2746                     {
2747                         dsc_filespec = dsc_development_filespec;
2748                         dsc_uuid = dsc_development_uuid;
2749                     }
2750                 }
2751                 if (!dsc_uuid.IsValid() && dsc_nondevelopment_filespec.Exists())
2752                 {
2753                     UUID dsc_nondevelopment_uuid = GetSharedCacheUUID (dsc_nondevelopment_filespec, byte_order, addr_byte_size);
2754                     if (dsc_nondevelopment_uuid.IsValid() && dsc_nondevelopment_uuid == process_shared_cache_uuid)
2755                     {
2756                         dsc_filespec = dsc_nondevelopment_filespec;
2757                         dsc_uuid = dsc_nondevelopment_uuid;
2758                     }
2759                 }
2760             }
2761
2762             // Failing a UUID match, prefer the development dyld_shared cache if both are present.
2763             if (!dsc_filespec.Exists())
2764             {
2765                 if (dsc_development_filespec.Exists())
2766                 {
2767                     dsc_filespec = dsc_development_filespec;
2768                 }
2769                 else
2770                 {
2771                     dsc_filespec = dsc_nondevelopment_filespec;
2772                 }
2773             }
2774
2775             /* The dyld_cache_header has a pointer to the dyld_cache_local_symbols_info structure (localSymbolsOffset).
2776                The dyld_cache_local_symbols_info structure gives us three things:
2777                  1. The start and count of the nlist records in the dyld_shared_cache file
2778                  2. The start and size of the strings for these nlist records
2779                  3. The start and count of dyld_cache_local_symbols_entry entries
2780
2781                There is one dyld_cache_local_symbols_entry per dylib/framework in the dyld shared cache.
2782                The "dylibOffset" field is the Mach-O header of this dylib/framework in the dyld shared cache.
2783                The dyld_cache_local_symbols_entry also lists the start of this dylib/framework's nlist records
2784                and the count of how many nlist records there are for this dylib/framework.
2785             */
2786
2787             // Process the dyld shared cache header to find the unmapped symbols
2788
2789             DataBufferSP dsc_data_sp = dsc_filespec.MemoryMapFileContentsIfLocal(0, sizeof(struct lldb_copy_dyld_cache_header_v1));
2790             if (!dsc_uuid.IsValid())
2791             {
2792                 dsc_uuid = GetSharedCacheUUID (dsc_filespec, byte_order, addr_byte_size);
2793             }
2794             if (dsc_data_sp)
2795             {
2796                 DataExtractor dsc_header_data (dsc_data_sp, byte_order, addr_byte_size);
2797
2798                 bool uuid_match = true;
2799                 if (dsc_uuid.IsValid() && process)
2800                 {
2801                     if (process_shared_cache_uuid.IsValid() && dsc_uuid != process_shared_cache_uuid)
2802                     {
2803                         // The on-disk dyld_shared_cache file is not the same as the one in this
2804                         // process' memory, don't use it.
2805                         uuid_match = false;
2806                         ModuleSP module_sp (GetModule());
2807                         if (module_sp)
2808                             module_sp->ReportWarning ("process shared cache does not match on-disk dyld_shared_cache file, some symbol names will be missing.");
2809                     }
2810                 }
2811
2812                 offset = offsetof (struct lldb_copy_dyld_cache_header_v1, mappingOffset);
2813
2814                 uint32_t mappingOffset = dsc_header_data.GetU32(&offset);
2815
2816                 // If the mappingOffset points to a location inside the header, we've
2817                 // opened an old dyld shared cache, and should not proceed further.
2818                 if (uuid_match && mappingOffset >= sizeof(struct lldb_copy_dyld_cache_header_v1))
2819                 {
2820
2821                     DataBufferSP dsc_mapping_info_data_sp = dsc_filespec.MemoryMapFileContentsIfLocal(mappingOffset, sizeof (struct lldb_copy_dyld_cache_mapping_info));
2822                     DataExtractor dsc_mapping_info_data(dsc_mapping_info_data_sp, byte_order, addr_byte_size);
2823                     offset = 0;
2824
2825                     // The File addresses (from the in-memory Mach-O load commands) for the shared libraries
2826                     // in the shared library cache need to be adjusted by an offset to match up with the
2827                     // dylibOffset identifying field in the dyld_cache_local_symbol_entry's.  This offset is
2828                     // recorded in mapping_offset_value.
2829                     const uint64_t mapping_offset_value = dsc_mapping_info_data.GetU64(&offset);
2830
2831                     offset = offsetof (struct lldb_copy_dyld_cache_header_v1, localSymbolsOffset);
2832                     uint64_t localSymbolsOffset = dsc_header_data.GetU64(&offset);
2833                     uint64_t localSymbolsSize = dsc_header_data.GetU64(&offset);
2834
2835                     if (localSymbolsOffset && localSymbolsSize)
2836                     {
2837                         // Map the local symbols
2838                         if (DataBufferSP dsc_local_symbols_data_sp = dsc_filespec.MemoryMapFileContentsIfLocal(localSymbolsOffset, localSymbolsSize))
2839                         {
2840                             DataExtractor dsc_local_symbols_data(dsc_local_symbols_data_sp, byte_order, addr_byte_size);
2841
2842                             offset = 0;
2843
2844                             typedef std::map<ConstString, uint16_t> UndefinedNameToDescMap;
2845                             typedef std::map<uint32_t, ConstString> SymbolIndexToName;
2846                             UndefinedNameToDescMap undefined_name_to_desc;
2847                             SymbolIndexToName reexport_shlib_needs_fixup;
2848
2849
2850                             // Read the local_symbols_infos struct in one shot
2851                             struct lldb_copy_dyld_cache_local_symbols_info local_symbols_info;
2852                             dsc_local_symbols_data.GetU32(&offset, &local_symbols_info.nlistOffset, 6);
2853
2854                             SectionSP text_section_sp(section_list->FindSectionByName(GetSegmentNameTEXT()));
2855
2856                             uint32_t header_file_offset = (text_section_sp->GetFileAddress() - mapping_offset_value);
2857
2858                             offset = local_symbols_info.entriesOffset;
2859                             for (uint32_t entry_index = 0; entry_index < local_symbols_info.entriesCount; entry_index++)
2860                             {
2861                                 struct lldb_copy_dyld_cache_local_symbols_entry local_symbols_entry;
2862                                 local_symbols_entry.dylibOffset = dsc_local_symbols_data.GetU32(&offset);
2863                                 local_symbols_entry.nlistStartIndex = dsc_local_symbols_data.GetU32(&offset);
2864                                 local_symbols_entry.nlistCount = dsc_local_symbols_data.GetU32(&offset);
2865
2866                                 if (header_file_offset == local_symbols_entry.dylibOffset)
2867                                 {
2868                                     unmapped_local_symbols_found = local_symbols_entry.nlistCount;
2869
2870                                     // The normal nlist code cannot correctly size the Symbols array, we need to allocate it here.
2871                                     sym = symtab->Resize (symtab_load_command.nsyms + m_dysymtab.nindirectsyms + unmapped_local_symbols_found - m_dysymtab.nlocalsym);
2872                                     num_syms = symtab->GetNumSymbols();
2873
2874                                     nlist_data_offset = local_symbols_info.nlistOffset + (nlist_byte_size * local_symbols_entry.nlistStartIndex);
2875                                     uint32_t string_table_offset = local_symbols_info.stringsOffset;
2876
2877                                     for (uint32_t nlist_index = 0; nlist_index < local_symbols_entry.nlistCount; nlist_index++)
2878                                     {
2879                                         /////////////////////////////
2880                                         {
2881                                             struct nlist_64 nlist;
2882                                             if (!dsc_local_symbols_data.ValidOffsetForDataOfSize(nlist_data_offset, nlist_byte_size))
2883                                                 break;
2884
2885                                             nlist.n_strx  = dsc_local_symbols_data.GetU32_unchecked(&nlist_data_offset);
2886                                             nlist.n_type  = dsc_local_symbols_data.GetU8_unchecked (&nlist_data_offset);
2887                                             nlist.n_sect  = dsc_local_symbols_data.GetU8_unchecked (&nlist_data_offset);
2888                                             nlist.n_desc  = dsc_local_symbols_data.GetU16_unchecked (&nlist_data_offset);
2889                                             nlist.n_value = dsc_local_symbols_data.GetAddress_unchecked (&nlist_data_offset);
2890
2891                                             SymbolType type = eSymbolTypeInvalid;
2892                                             const char *symbol_name = dsc_local_symbols_data.PeekCStr(string_table_offset + nlist.n_strx);
2893
2894                                             if (symbol_name == NULL)
2895                                             {
2896                                                 // No symbol should be NULL, even the symbols with no
2897                                                 // string values should have an offset zero which points
2898                                                 // to an empty C-string
2899                                                 Host::SystemLog (Host::eSystemLogError,
2900                                                                  "error: DSC unmapped local symbol[%u] has invalid string table offset 0x%x in %s, ignoring symbol\n",
2901                                                                  entry_index,
2902                                                                  nlist.n_strx,
2903                                                                  module_sp->GetFileSpec().GetPath().c_str());
2904                                                 continue;
2905                                             }
2906                                             if (symbol_name[0] == '\0')
2907                                                 symbol_name = NULL;
2908
2909                                             const char *symbol_name_non_abi_mangled = NULL;
2910
2911                                             SectionSP symbol_section;
2912                                             uint32_t symbol_byte_size = 0;
2913                                             bool add_nlist = true;
2914                                             bool is_debug = ((nlist.n_type & N_STAB) != 0);
2915                                             bool demangled_is_synthesized = false;
2916                                             bool is_gsym = false;
2917                                             bool set_value = true;
2918
2919                                             assert (sym_idx < num_syms);
2920
2921                                             sym[sym_idx].SetDebug (is_debug);
2922
2923                                             if (is_debug)
2924                                             {
2925                                                 switch (nlist.n_type)
2926                                                 {
2927                                                     case N_GSYM:
2928                                                         // global symbol: name,,NO_SECT,type,0
2929                                                         // Sometimes the N_GSYM value contains the address.
2930
2931                                                         // FIXME: In the .o files, we have a GSYM and a debug symbol for all the ObjC data.  They
2932                                                         // have the same address, but we want to ensure that we always find only the real symbol,
2933                                                         // 'cause we don't currently correctly attribute the GSYM one to the ObjCClass/Ivar/MetaClass
2934                                                         // symbol type.  This is a temporary hack to make sure the ObjectiveC symbols get treated
2935                                                         // correctly.  To do this right, we should coalesce all the GSYM & global symbols that have the
2936                                                         // same address.
2937
2938                                                         is_gsym = true;
2939                                                         sym[sym_idx].SetExternal(true);
2940
2941                                                         if (symbol_name && symbol_name[0] == '_' && symbol_name[1] ==  'O')
2942                                                         {
2943                                                             llvm::StringRef symbol_name_ref(symbol_name);
2944                                                             if (symbol_name_ref.startswith(g_objc_v2_prefix_class))
2945                                                             {
2946                                                                 symbol_name_non_abi_mangled = symbol_name + 1;
2947                                                                 symbol_name = symbol_name + g_objc_v2_prefix_class.size();
2948                                                                 type = eSymbolTypeObjCClass;
2949                                                                 demangled_is_synthesized = true;
2950
2951                                                             }
2952                                                             else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass))
2953                                                             {
2954                                                                 symbol_name_non_abi_mangled = symbol_name + 1;
2955                                                                 symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size();
2956                                                                 type = eSymbolTypeObjCMetaClass;
2957                                                                 demangled_is_synthesized = true;
2958                                                             }
2959                                                             else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar))
2960                                                             {
2961                                                                 symbol_name_non_abi_mangled = symbol_name + 1;
2962                                                                 symbol_name = symbol_name + g_objc_v2_prefix_ivar.size();
2963                                                                 type = eSymbolTypeObjCIVar;
2964                                                                 demangled_is_synthesized = true;
2965                                                             }
2966                                                         }
2967                                                         else
2968                                                         {
2969                                                             if (nlist.n_value != 0)
2970                                                                 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
2971                                                             type = eSymbolTypeData;
2972                                                         }
2973                                                         break;
2974
2975                                                     case N_FNAME:
2976                                                         // procedure name (f77 kludge): name,,NO_SECT,0,0
2977                                                         type = eSymbolTypeCompiler;
2978                                                         break;
2979
2980                                                     case N_FUN:
2981                                                         // procedure: name,,n_sect,linenumber,address
2982                                                         if (symbol_name)
2983                                                         {
2984                                                             type = eSymbolTypeCode;
2985                                                             symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
2986
2987                                                             N_FUN_addr_to_sym_idx.insert(std::make_pair(nlist.n_value, sym_idx));
2988                                                             // We use the current number of symbols in the symbol table in lieu of
2989                                                             // using nlist_idx in case we ever start trimming entries out
2990                                                             N_FUN_indexes.push_back(sym_idx);
2991                                                         }
2992                                                         else
2993                                                         {
2994                                                             type = eSymbolTypeCompiler;
2995
2996                                                             if ( !N_FUN_indexes.empty() )
2997                                                             {
2998                                                                 // Copy the size of the function into the original STAB entry so we don't have
2999                                                                 // to hunt for it later
3000                                                                 symtab->SymbolAtIndex(N_FUN_indexes.back())->SetByteSize(nlist.n_value);
3001                                                                 N_FUN_indexes.pop_back();
3002                                                                 // We don't really need the end function STAB as it contains the size which
3003                                                                 // we already placed with the original symbol, so don't add it if we want a
3004                                                                 // minimal symbol table
3005                                                                 add_nlist = false;
3006                                                             }
3007                                                         }
3008                                                         break;
3009
3010                                                     case N_STSYM:
3011                                                         // static symbol: name,,n_sect,type,address
3012                                                         N_STSYM_addr_to_sym_idx.insert(std::make_pair(nlist.n_value, sym_idx));
3013                                                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3014                                                         if (symbol_name && symbol_name[0])
3015                                                         {
3016                                                             type = ObjectFile::GetSymbolTypeFromName(symbol_name+1, eSymbolTypeData);
3017                                                         }
3018                                                         break;
3019
3020                                                     case N_LCSYM:
3021                                                         // .lcomm symbol: name,,n_sect,type,address
3022                                                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3023                                                         type = eSymbolTypeCommonBlock;
3024                                                         break;
3025
3026                                                     case N_BNSYM:
3027                                                         // We use the current number of symbols in the symbol table in lieu of
3028                                                         // using nlist_idx in case we ever start trimming entries out
3029                                                         // Skip these if we want minimal symbol tables
3030                                                         add_nlist = false;
3031                                                         break;
3032
3033                                                     case N_ENSYM:
3034                                                         // Set the size of the N_BNSYM to the terminating index of this N_ENSYM
3035                                                         // so that we can always skip the entire symbol if we need to navigate
3036                                                         // more quickly at the source level when parsing STABS
3037                                                         // Skip these if we want minimal symbol tables
3038                                                         add_nlist = false;
3039                                                         break;
3040
3041                                                     case N_OPT:
3042                                                         // emitted with gcc2_compiled and in gcc source
3043                                                         type = eSymbolTypeCompiler;
3044                                                         break;
3045
3046                                                     case N_RSYM:
3047                                                         // register sym: name,,NO_SECT,type,register
3048                                                         type = eSymbolTypeVariable;
3049                                                         break;
3050
3051                                                     case N_SLINE:
3052                                                         // src line: 0,,n_sect,linenumber,address
3053                                                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3054                                                         type = eSymbolTypeLineEntry;
3055                                                         break;
3056
3057                                                     case N_SSYM:
3058                                                         // structure elt: name,,NO_SECT,type,struct_offset
3059                                                         type = eSymbolTypeVariableType;
3060                                                         break;
3061
3062                                                     case N_SO:
3063                                                         // source file name
3064                                                         type = eSymbolTypeSourceFile;
3065                                                         if (symbol_name == NULL)
3066                                                         {
3067                                                             add_nlist = false;
3068                                                             if (N_SO_index != UINT32_MAX)
3069                                                             {
3070                                                                 // Set the size of the N_SO to the terminating index of this N_SO
3071                                                                 // so that we can always skip the entire N_SO if we need to navigate
3072                                                                 // more quickly at the source level when parsing STABS
3073                                                                 symbol_ptr = symtab->SymbolAtIndex(N_SO_index);
3074                                                                 symbol_ptr->SetByteSize(sym_idx);
3075                                                                 symbol_ptr->SetSizeIsSibling(true);
3076                                                             }
3077                                                             N_NSYM_indexes.clear();
3078                                                             N_INCL_indexes.clear();
3079                                                             N_BRAC_indexes.clear();
3080                                                             N_COMM_indexes.clear();
3081                                                             N_FUN_indexes.clear();
3082                                                             N_SO_index = UINT32_MAX;
3083                                                         }
3084                                                         else
3085                                                         {
3086                                                             // We use the current number of symbols in the symbol table in lieu of
3087                                                             // using nlist_idx in case we ever start trimming entries out
3088                                                             const bool N_SO_has_full_path = symbol_name[0] == '/';
3089                                                             if (N_SO_has_full_path)
3090                                                             {
3091                                                                 if ((N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms))
3092                                                                 {
3093                                                                     // We have two consecutive N_SO entries where the first contains a directory
3094                                                                     // and the second contains a full path.
3095                                                                     sym[sym_idx - 1].GetMangled().SetValue(ConstString(symbol_name), false);
3096                                                                     m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1;
3097                                                                     add_nlist = false;
3098                                                                 }
3099                                                                 else
3100                                                                 {
3101                                                                     // This is the first entry in a N_SO that contains a directory or
3102                                                                     // a full path to the source file
3103                                                                     N_SO_index = sym_idx;
3104                                                                 }
3105                                                             }
3106                                                             else if ((N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms))
3107                                                             {
3108                                                                 // This is usually the second N_SO entry that contains just the filename,
3109                                                                 // so here we combine it with the first one if we are minimizing the symbol table
3110                                                                 const char *so_path = sym[sym_idx - 1].GetMangled().GetDemangledName(lldb::eLanguageTypeUnknown).AsCString();
3111                                                                 if (so_path && so_path[0])
3112                                                                 {
3113                                                                     std::string full_so_path (so_path);
3114                                                                     const size_t double_slash_pos = full_so_path.find("//");
3115                                                                     if (double_slash_pos != std::string::npos)
3116                                                                     {
3117                                                                         // The linker has been generating bad N_SO entries with doubled up paths
3118                                                                         // in the format "%s%s" where the first string in the DW_AT_comp_dir,
3119                                                                         // and the second is the directory for the source file so you end up with
3120                                                                         // a path that looks like "/tmp/src//tmp/src/"
3121                                                                         FileSpec so_dir(so_path, false);
3122                                                                         if (!so_dir.Exists())
3123                                                                         {
3124                                                                             so_dir.SetFile(&full_so_path[double_slash_pos + 1], false);
3125                                                                             if (so_dir.Exists())
3126                                                                             {
3127                                                                                 // Trim off the incorrect path
3128                                                                                 full_so_path.erase(0, double_slash_pos + 1);
3129                                                                             }
3130                                                                         }
3131                                                                     }
3132                                                                     if (*full_so_path.rbegin() != '/')
3133                                                                         full_so_path += '/';
3134                                                                     full_so_path += symbol_name;
3135                                                                     sym[sym_idx - 1].GetMangled().SetValue(ConstString(full_so_path.c_str()), false);
3136                                                                     add_nlist = false;
3137                                                                     m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1;
3138                                                                 }
3139                                                             }
3140                                                             else
3141                                                             {
3142                                                                 // This could be a relative path to a N_SO
3143                                                                 N_SO_index = sym_idx;
3144                                                             }
3145                                                         }
3146                                                         break;
3147
3148                                                     case N_OSO:
3149                                                         // object file name: name,,0,0,st_mtime
3150                                                         type = eSymbolTypeObjectFile;
3151                                                         break;
3152
3153                                                     case N_LSYM:
3154                                                         // local sym: name,,NO_SECT,type,offset
3155                                                         type = eSymbolTypeLocal;
3156                                                         break;
3157
3158                                                         //----------------------------------------------------------------------
3159                                                         // INCL scopes
3160                                                         //----------------------------------------------------------------------
3161                                                     case N_BINCL:
3162                                                         // include file beginning: name,,NO_SECT,0,sum
3163                                                         // We use the current number of symbols in the symbol table in lieu of
3164                                                         // using nlist_idx in case we ever start trimming entries out
3165                                                         N_INCL_indexes.push_back(sym_idx);
3166                                                         type = eSymbolTypeScopeBegin;
3167                                                         break;
3168
3169                                                     case N_EINCL:
3170                                                         // include file end: name,,NO_SECT,0,0
3171                                                         // Set the size of the N_BINCL to the terminating index of this N_EINCL
3172                                                         // so that we can always skip the entire symbol if we need to navigate
3173                                                         // more quickly at the source level when parsing STABS
3174                                                         if ( !N_INCL_indexes.empty() )
3175                                                         {
3176                                                             symbol_ptr = symtab->SymbolAtIndex(N_INCL_indexes.back());
3177                                                             symbol_ptr->SetByteSize(sym_idx + 1);
3178                                                             symbol_ptr->SetSizeIsSibling(true);
3179                                                             N_INCL_indexes.pop_back();
3180                                                         }
3181                                                         type = eSymbolTypeScopeEnd;
3182                                                         break;
3183
3184                                                     case N_SOL:
3185                                                         // #included file name: name,,n_sect,0,address
3186                                                         type = eSymbolTypeHeaderFile;
3187
3188                                                         // We currently don't use the header files on darwin
3189                                                         add_nlist = false;
3190                                                         break;
3191
3192                                                     case N_PARAMS:
3193                                                         // compiler parameters: name,,NO_SECT,0,0
3194                                                         type = eSymbolTypeCompiler;
3195                                                         break;
3196
3197                                                     case N_VERSION:
3198                                                         // compiler version: name,,NO_SECT,0,0
3199                                                         type = eSymbolTypeCompiler;
3200                                                         break;
3201
3202                                                     case N_OLEVEL:
3203                                                         // compiler -O level: name,,NO_SECT,0,0
3204                                                         type = eSymbolTypeCompiler;
3205                                                         break;
3206
3207                                                     case N_PSYM:
3208                                                         // parameter: name,,NO_SECT,type,offset
3209                                                         type = eSymbolTypeVariable;
3210                                                         break;
3211
3212                                                     case N_ENTRY:
3213                                                         // alternate entry: name,,n_sect,linenumber,address
3214                                                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3215                                                         type = eSymbolTypeLineEntry;
3216                                                         break;
3217
3218                                                         //----------------------------------------------------------------------
3219                                                         // Left and Right Braces
3220                                                         //----------------------------------------------------------------------
3221                                                     case N_LBRAC:
3222                                                         // left bracket: 0,,NO_SECT,nesting level,address
3223                                                         // We use the current number of symbols in the symbol table in lieu of
3224                                                         // using nlist_idx in case we ever start trimming entries out
3225                                                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3226                                                         N_BRAC_indexes.push_back(sym_idx);
3227                                                         type = eSymbolTypeScopeBegin;
3228                                                         break;
3229
3230                                                     case N_RBRAC:
3231                                                         // right bracket: 0,,NO_SECT,nesting level,address
3232                                                         // Set the size of the N_LBRAC to the terminating index of this N_RBRAC
3233                                                         // so that we can always skip the entire symbol if we need to navigate
3234                                                         // more quickly at the source level when parsing STABS
3235                                                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3236                                                         if ( !N_BRAC_indexes.empty() )
3237                                                         {
3238                                                             symbol_ptr = symtab->SymbolAtIndex(N_BRAC_indexes.back());
3239                                                             symbol_ptr->SetByteSize(sym_idx + 1);
3240                                                             symbol_ptr->SetSizeIsSibling(true);
3241                                                             N_BRAC_indexes.pop_back();
3242                                                         }
3243                                                         type = eSymbolTypeScopeEnd;
3244                                                         break;
3245
3246                                                     case N_EXCL:
3247                                                         // deleted include file: name,,NO_SECT,0,sum
3248                                                         type = eSymbolTypeHeaderFile;
3249                                                         break;
3250
3251                                                         //----------------------------------------------------------------------
3252                                                         // COMM scopes
3253                                                         //----------------------------------------------------------------------
3254                                                     case N_BCOMM:
3255                                                         // begin common: name,,NO_SECT,0,0
3256                                                         // We use the current number of symbols in the symbol table in lieu of
3257                                                         // using nlist_idx in case we ever start trimming entries out
3258                                                         type = eSymbolTypeScopeBegin;
3259                                                         N_COMM_indexes.push_back(sym_idx);
3260                                                         break;
3261
3262                                                     case N_ECOML:
3263                                                         // end common (local name): 0,,n_sect,0,address
3264                                                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3265                                                         // Fall through
3266
3267                                                     case N_ECOMM:
3268                                                         // end common: name,,n_sect,0,0
3269                                                         // Set the size of the N_BCOMM to the terminating index of this N_ECOMM/N_ECOML
3270                                                         // so that we can always skip the entire symbol if we need to navigate
3271                                                         // more quickly at the source level when parsing STABS
3272                                                         if ( !N_COMM_indexes.empty() )
3273                                                         {
3274                                                             symbol_ptr = symtab->SymbolAtIndex(N_COMM_indexes.back());
3275                                                             symbol_ptr->SetByteSize(sym_idx + 1);
3276                                                             symbol_ptr->SetSizeIsSibling(true);
3277                                                             N_COMM_indexes.pop_back();
3278                                                         }
3279                                                         type = eSymbolTypeScopeEnd;
3280                                                         break;
3281
3282                                                     case N_LENG:
3283                                                         // second stab entry with length information
3284                                                         type = eSymbolTypeAdditional;
3285                                                         break;
3286
3287                                                     default: break;
3288                                                 }
3289                                             }
3290                                             else
3291                                             {
3292                                                 //uint8_t n_pext    = N_PEXT & nlist.n_type;
3293                                                 uint8_t n_type  = N_TYPE & nlist.n_type;
3294                                                 sym[sym_idx].SetExternal((N_EXT & nlist.n_type) != 0);
3295
3296                                                 switch (n_type)
3297                                                 {
3298                                                     case N_INDR:
3299                                                         {
3300                                                             const char *reexport_name_cstr = strtab_data.PeekCStr(nlist.n_value);
3301                                                             if (reexport_name_cstr && reexport_name_cstr[0])
3302                                                             {
3303                                                                 type = eSymbolTypeReExported;
3304                                                                 ConstString reexport_name(reexport_name_cstr + ((reexport_name_cstr[0] == '_') ? 1 : 0));
3305                                                                 sym[sym_idx].SetReExportedSymbolName(reexport_name);
3306                                                                 set_value = false;
3307                                                                 reexport_shlib_needs_fixup[sym_idx] = reexport_name;
3308                                                                 indirect_symbol_names.insert(ConstString(symbol_name + ((symbol_name[0] == '_') ? 1 : 0)));
3309                                                             }
3310                                                             else
3311                                                                 type = eSymbolTypeUndefined;
3312                                                         }
3313                                                         break;
3314
3315                                                     case N_UNDF:
3316                                                         if (symbol_name && symbol_name[0])
3317                                                         {
3318                                                             ConstString undefined_name(symbol_name + ((symbol_name[0] == '_') ? 1 : 0));
3319                                                             undefined_name_to_desc[undefined_name] = nlist.n_desc;
3320                                                         }
3321                                                         // Fall through
3322                                                     case N_PBUD:
3323                                                         type = eSymbolTypeUndefined;
3324                                                         break;
3325
3326                                                     case N_ABS:
3327                                                         type = eSymbolTypeAbsolute;
3328                                                         break;
3329
3330                                                     case N_SECT:
3331                                                         {
3332                                                             symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3333
3334                                                             if (symbol_section == NULL)
3335                                                             {
3336                                                                 // TODO: warn about this?
3337                                                                 add_nlist = false;
3338                                                                 break;
3339                                                             }
3340
3341                                                             if (TEXT_eh_frame_sectID == nlist.n_sect)
3342                                                             {
3343                                                                 type = eSymbolTypeException;
3344                                                             }
3345                                                             else
3346                                                             {
3347                                                                 uint32_t section_type = symbol_section->Get() & SECTION_TYPE;
3348
3349                                                                 switch (section_type)
3350                                                                 {
3351                                                                     case S_CSTRING_LITERALS:           type = eSymbolTypeData;    break; // section with only literal C strings
3352                                                                     case S_4BYTE_LITERALS:             type = eSymbolTypeData;    break; // section with only 4 byte literals
3353                                                                     case S_8BYTE_LITERALS:             type = eSymbolTypeData;    break; // section with only 8 byte literals
3354                                                                     case S_LITERAL_POINTERS:           type = eSymbolTypeTrampoline; break; // section with only pointers to literals
3355                                                                     case S_NON_LAZY_SYMBOL_POINTERS:   type = eSymbolTypeTrampoline; break; // section with only non-lazy symbol pointers
3356                                                                     case S_LAZY_SYMBOL_POINTERS:       type = eSymbolTypeTrampoline; break; // section with only lazy symbol pointers
3357                                                                     case S_SYMBOL_STUBS:               type = eSymbolTypeTrampoline; break; // section with only symbol stubs, byte size of stub in the reserved2 field
3358                                                                     case S_MOD_INIT_FUNC_POINTERS:     type = eSymbolTypeCode;    break; // section with only function pointers for initialization
3359                                                                     case S_MOD_TERM_FUNC_POINTERS:     type = eSymbolTypeCode;    break; // section with only function pointers for termination
3360                                                                     case S_INTERPOSING:                type = eSymbolTypeTrampoline;  break; // section with only pairs of function pointers for interposing
3361                                                                     case S_16BYTE_LITERALS:            type = eSymbolTypeData;    break; // section with only 16 byte literals
3362                                                                     case S_DTRACE_DOF:                 type = eSymbolTypeInstrumentation; break;
3363                                                                     case S_LAZY_DYLIB_SYMBOL_POINTERS: type = eSymbolTypeTrampoline; break;
3364                                                                     default:
3365                                                                         switch (symbol_section->GetType())
3366                                                                         {
3367                                                                             case lldb::eSectionTypeCode:
3368                                                                                 type = eSymbolTypeCode;
3369                                                                                 break;
3370                                                                             case eSectionTypeData:
3371                                                                             case eSectionTypeDataCString:            // Inlined C string data
3372                                                                             case eSectionTypeDataCStringPointers:    // Pointers to C string data
3373                                                                             case eSectionTypeDataSymbolAddress:      // Address of a symbol in the symbol table
3374                                                                             case eSectionTypeData4:
3375                                                                             case eSectionTypeData8:
3376                                                                             case eSectionTypeData16:
3377                                                                                 type = eSymbolTypeData;
3378                                                                                 break;
3379                                                                             default:
3380                                                                                 break;
3381                                                                         }
3382                                                                         break;
3383                                                                 }
3384
3385                                                                 if (type == eSymbolTypeInvalid)
3386                                                                 {
3387                                                                     const char *symbol_sect_name = symbol_section->GetName().AsCString();
3388                                                                     if (symbol_section->IsDescendant (text_section_sp.get()))
3389                                                                     {
3390                                                                         if (symbol_section->IsClear(S_ATTR_PURE_INSTRUCTIONS |
3391                                                                                                     S_ATTR_SELF_MODIFYING_CODE |
3392                                                                                                     S_ATTR_SOME_INSTRUCTIONS))
3393                                                                             type = eSymbolTypeData;
3394                                                                         else
3395                                                                             type = eSymbolTypeCode;
3396                                                                     }
3397                                                                     else if (symbol_section->IsDescendant(data_section_sp.get()) ||
3398                                                                              symbol_section->IsDescendant(data_dirty_section_sp.get()) ||
3399                                                                              symbol_section->IsDescendant(data_const_section_sp.get()))
3400                                                                     {
3401                                                                         if (symbol_sect_name && ::strstr (symbol_sect_name, "__objc") == symbol_sect_name)
3402                                                                         {
3403                                                                             type = eSymbolTypeRuntime;
3404
3405                                                                             if (symbol_name)
3406                                                                             {
3407                                                                                 llvm::StringRef symbol_name_ref(symbol_name);
3408                                                                                 if (symbol_name_ref.startswith("_OBJC_"))
3409                                                                                 {
3410                                                                                     static const llvm::StringRef g_objc_v2_prefix_class ("_OBJC_CLASS_$_");
3411                                                                                     static const llvm::StringRef g_objc_v2_prefix_metaclass ("_OBJC_METACLASS_$_");
3412                                                                                     static const llvm::StringRef g_objc_v2_prefix_ivar ("_OBJC_IVAR_$_");
3413                                                                                     if (symbol_name_ref.startswith(g_objc_v2_prefix_class))
3414                                                                                     {
3415                                                                                         symbol_name_non_abi_mangled = symbol_name + 1;
3416                                                                                         symbol_name = symbol_name + g_objc_v2_prefix_class.size();
3417                                                                                         type = eSymbolTypeObjCClass;
3418                                                                                         demangled_is_synthesized = true;
3419                                                                                     }
3420                                                                                     else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass))
3421                                                                                     {
3422                                                                                         symbol_name_non_abi_mangled = symbol_name + 1;
3423                                                                                         symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size();
3424                                                                                         type = eSymbolTypeObjCMetaClass;
3425                                                                                         demangled_is_synthesized = true;
3426                                                                                     }
3427                                                                                     else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar))
3428                                                                                     {
3429                                                                                         symbol_name_non_abi_mangled = symbol_name + 1;
3430                                                                                         symbol_name = symbol_name + g_objc_v2_prefix_ivar.size();
3431                                                                                         type = eSymbolTypeObjCIVar;
3432                                                                                         demangled_is_synthesized = true;
3433                                                                                     }
3434                                                                                 }
3435                                                                             }
3436                                                                         }
3437                                                                         else if (symbol_sect_name && ::strstr (symbol_sect_name, "__gcc_except_tab") == symbol_sect_name)
3438                                                                         {
3439                                                                             type = eSymbolTypeException;
3440                                                                         }
3441                                                                         else
3442                                                                         {
3443                                                                             type = eSymbolTypeData;
3444                                                                         }
3445                                                                     }
3446                                                                     else if (symbol_sect_name && ::strstr (symbol_sect_name, "__IMPORT") == symbol_sect_name)
3447                                                                     {
3448                                                                         type = eSymbolTypeTrampoline;
3449                                                                     }
3450                                                                     else if (symbol_section->IsDescendant(objc_section_sp.get()))
3451                                                                     {
3452                                                                         type = eSymbolTypeRuntime;
3453                                                                         if (symbol_name && symbol_name[0] == '.')
3454                                                                         {
3455                                                                             llvm::StringRef symbol_name_ref(symbol_name);
3456                                                                             static const llvm::StringRef g_objc_v1_prefix_class (".objc_class_name_");
3457                                                                             if (symbol_name_ref.startswith(g_objc_v1_prefix_class))
3458                                                                             {
3459                                                                                 symbol_name_non_abi_mangled = symbol_name;
3460                                                                                 symbol_name = symbol_name + g_objc_v1_prefix_class.size();
3461                                                                                 type = eSymbolTypeObjCClass;
3462                                                                                 demangled_is_synthesized = true;
3463                                                                             }
3464                                                                         }
3465                                                                     }
3466                                                                 }
3467                                                             }
3468                                                         }
3469                                                         break;
3470                                                 }
3471                                             }
3472
3473                                             if (add_nlist)
3474                                             {
3475                                                 uint64_t symbol_value = nlist.n_value;
3476                                                 if (symbol_name_non_abi_mangled)
3477                                                 {
3478                                                     sym[sym_idx].GetMangled().SetMangledName (ConstString(symbol_name_non_abi_mangled));
3479                                                     sym[sym_idx].GetMangled().SetDemangledName (ConstString(symbol_name));
3480                                                 }
3481                                                 else
3482                                                 {
3483                                                     bool symbol_name_is_mangled = false;
3484
3485                                                     if (symbol_name && symbol_name[0] == '_')
3486                                                     {
3487                                                         symbol_name_is_mangled = symbol_name[1] == '_';
3488                                                         symbol_name++;  // Skip the leading underscore
3489                                                     }
3490
3491                                                     if (symbol_name)
3492                                                     {
3493                                                         ConstString const_symbol_name(symbol_name);
3494                                                         sym[sym_idx].GetMangled().SetValue(const_symbol_name, symbol_name_is_mangled);
3495                                                         if (is_gsym && is_debug)
3496                                                         {
3497                                                             const char *gsym_name = sym[sym_idx].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled).GetCString();
3498                                                             if (gsym_name)
3499                                                                 N_GSYM_name_to_sym_idx[gsym_name] = sym_idx;
3500                                                         }
3501                                                     }
3502                                                 }
3503                                                 if (symbol_section)
3504                                                 {
3505                                                     const addr_t section_file_addr = symbol_section->GetFileAddress();
3506                                                     if (symbol_byte_size == 0 && function_starts_count > 0)
3507                                                     {
3508                                                         addr_t symbol_lookup_file_addr = nlist.n_value;
3509                                                         // Do an exact address match for non-ARM addresses, else get the closest since
3510                                                         // the symbol might be a thumb symbol which has an address with bit zero set
3511                                                         FunctionStarts::Entry *func_start_entry = function_starts.FindEntry (symbol_lookup_file_addr, !is_arm);
3512                                                         if (is_arm && func_start_entry)
3513                                                         {
3514                                                             // Verify that the function start address is the symbol address (ARM)
3515                                                             // or the symbol address + 1 (thumb)
3516                                                             if (func_start_entry->addr != symbol_lookup_file_addr &&
3517                                                                 func_start_entry->addr != (symbol_lookup_file_addr + 1))
3518                                                             {
3519                                                                 // Not the right entry, NULL it out...
3520                                                                 func_start_entry = NULL;
3521                                                             }
3522                                                         }
3523                                                         if (func_start_entry)
3524                                                         {
3525                                                             func_start_entry->data = true;
3526
3527                                                             addr_t symbol_file_addr = func_start_entry->addr;
3528                                                             uint32_t symbol_flags = 0;
3529                                                             if (is_arm)
3530                                                             {
3531                                                                 if (symbol_file_addr & 1)
3532                                                                     symbol_flags = MACHO_NLIST_ARM_SYMBOL_IS_THUMB;
3533                                                                 symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
3534                                                             }
3535
3536                                                             const FunctionStarts::Entry *next_func_start_entry = function_starts.FindNextEntry (func_start_entry);
3537                                                             const addr_t section_end_file_addr = section_file_addr + symbol_section->GetByteSize();
3538                                                             if (next_func_start_entry)
3539                                                             {
3540                                                                 addr_t next_symbol_file_addr = next_func_start_entry->addr;
3541                                                                 // Be sure the clear the Thumb address bit when we calculate the size
3542                                                                 // from the current and next address
3543                                                                 if (is_arm)
3544                                                                     next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
3545                                                                 symbol_byte_size = std::min<lldb::addr_t>(next_symbol_file_addr - symbol_file_addr, section_end_file_addr - symbol_file_addr);
3546                                                             }
3547                                                             else
3548                                                             {
3549                                                                 symbol_byte_size = section_end_file_addr - symbol_file_addr;
3550                                                             }
3551                                                         }
3552                                                     }
3553                                                     symbol_value -= section_file_addr;
3554                                                 }
3555
3556                                                 if (is_debug == false)
3557                                                 {
3558                                                     if (type == eSymbolTypeCode)
3559                                                     {
3560                                                         // See if we can find a N_FUN entry for any code symbols.
3561                                                         // If we do find a match, and the name matches, then we
3562                                                         // can merge the two into just the function symbol to avoid
3563                                                         // duplicate entries in the symbol table
3564                                                         std::pair<ValueToSymbolIndexMap::const_iterator, ValueToSymbolIndexMap::const_iterator> range;
3565                                                         range = N_FUN_addr_to_sym_idx.equal_range(nlist.n_value);
3566                                                         if (range.first != range.second)
3567                                                         {
3568                                                             bool found_it = false;
3569                                                             for (ValueToSymbolIndexMap::const_iterator pos = range.first; pos != range.second; ++pos)
3570                                                             {
3571                                                                 if (sym[sym_idx].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled) == sym[pos->second].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled))
3572                                                                 {
3573                                                                     m_nlist_idx_to_sym_idx[nlist_idx] = pos->second;
3574                                                                     // We just need the flags from the linker symbol, so put these flags
3575                                                                     // into the N_FUN flags to avoid duplicate symbols in the symbol table
3576                                                                     sym[pos->second].SetExternal(sym[sym_idx].IsExternal());
3577                                                                     sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc);
3578                                                                     if (resolver_addresses.find(nlist.n_value) != resolver_addresses.end())
3579                                                                         sym[pos->second].SetType (eSymbolTypeResolver);
3580                                                                     sym[sym_idx].Clear();
3581                                                                     found_it = true;
3582                                                                     break;
3583                                                                 }
3584                                                             }
3585                                                             if (found_it)
3586                                                                 continue;
3587                                                         }
3588                                                         else
3589                                                         {
3590                                                             if (resolver_addresses.find(nlist.n_value) != resolver_addresses.end())
3591                                                                 type = eSymbolTypeResolver;
3592                                                         }
3593                                                     }
3594                                                     else if (type == eSymbolTypeData          ||
3595                                                              type == eSymbolTypeObjCClass     ||
3596                                                              type == eSymbolTypeObjCMetaClass ||
3597                                                              type == eSymbolTypeObjCIVar      )
3598                                                     {
3599                                                         // See if we can find a N_STSYM entry for any data symbols.
3600                                                         // If we do find a match, and the name matches, then we
3601                                                         // can merge the two into just the Static symbol to avoid
3602                                                         // duplicate entries in the symbol table
3603                                                         std::pair<ValueToSymbolIndexMap::const_iterator, ValueToSymbolIndexMap::const_iterator> range;
3604                                                         range = N_STSYM_addr_to_sym_idx.equal_range(nlist.n_value);
3605                                                         if (range.first != range.second)
3606                                                         {
3607                                                             bool found_it = false;
3608                                                             for (ValueToSymbolIndexMap::const_iterator pos = range.first; pos != range.second; ++pos)
3609                                                             {
3610                                                                 if (sym[sym_idx].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled) == sym[pos->second].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled))
3611                                                                 {
3612                                                                     m_nlist_idx_to_sym_idx[nlist_idx] = pos->second;
3613                                                                     // We just need the flags from the linker symbol, so put these flags
3614                                                                     // into the N_STSYM flags to avoid duplicate symbols in the symbol table
3615                                                                     sym[pos->second].SetExternal(sym[sym_idx].IsExternal());
3616                                                                     sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc);
3617                                                                     sym[sym_idx].Clear();
3618                                                                     found_it = true;
3619                                                                     break;
3620                                                                 }
3621                                                             }
3622                                                             if (found_it)
3623                                                                 continue;
3624                                                         }
3625                                                         else
3626                                                         {
3627                                                             const char *gsym_name = sym[sym_idx].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled).GetCString();
3628                                                             if (gsym_name)
3629                                                             {
3630                                                                 // Combine N_GSYM stab entries with the non stab symbol
3631                                                                 ConstNameToSymbolIndexMap::const_iterator pos = N_GSYM_name_to_sym_idx.find(gsym_name);
3632                                                                 if (pos != N_GSYM_name_to_sym_idx.end())
3633                                                                 {
3634                                                                     const uint32_t GSYM_sym_idx = pos->second;
3635                                                                     m_nlist_idx_to_sym_idx[nlist_idx] = GSYM_sym_idx;
3636                                                                     // Copy the address, because often the N_GSYM address has an invalid address of zero
3637                                                                     // when the global is a common symbol
3638                                                                     sym[GSYM_sym_idx].GetAddressRef().SetSection (symbol_section);
3639                                                                     sym[GSYM_sym_idx].GetAddressRef().SetOffset (symbol_value);
3640                                                                     // We just need the flags from the linker symbol, so put these flags
3641                                                                     // into the N_GSYM flags to avoid duplicate symbols in the symbol table
3642                                                                     sym[GSYM_sym_idx].SetFlags (nlist.n_type << 16 | nlist.n_desc);
3643                                                                     sym[sym_idx].Clear();
3644                                                                     continue;
3645                                                                 }
3646                                                             }
3647                                                         }
3648                                                     }
3649                                                 }
3650
3651                                                 sym[sym_idx].SetID (nlist_idx);
3652                                                 sym[sym_idx].SetType (type);
3653                                                 if (set_value)
3654                                                 {
3655                                                     sym[sym_idx].GetAddressRef().SetSection (symbol_section);
3656                                                     sym[sym_idx].GetAddressRef().SetOffset (symbol_value);
3657                                                 }
3658                                                 sym[sym_idx].SetFlags (nlist.n_type << 16 | nlist.n_desc);
3659
3660                                                 if (symbol_byte_size > 0)
3661                                                     sym[sym_idx].SetByteSize(symbol_byte_size);
3662
3663                                                 if (demangled_is_synthesized)
3664                                                     sym[sym_idx].SetDemangledNameIsSynthesized(true);
3665                                                 ++sym_idx;
3666                                             }
3667                                             else
3668                                             {
3669                                                 sym[sym_idx].Clear();
3670                                             }
3671
3672                                         }
3673                                         /////////////////////////////
3674                                     }
3675                                     break; // No more entries to consider
3676                                 }
3677                             }
3678
3679                             for (const auto &pos :reexport_shlib_needs_fixup)
3680                             {
3681                                 const auto undef_pos = undefined_name_to_desc.find(pos.second);
3682                                 if (undef_pos != undefined_name_to_desc.end())
3683                                 {
3684                                     const uint8_t dylib_ordinal = llvm::MachO::GET_LIBRARY_ORDINAL(undef_pos->second);
3685                                     if (dylib_ordinal > 0 && dylib_ordinal < dylib_files.GetSize())
3686                                         sym[pos.first].SetReExportedSymbolSharedLibrary(dylib_files.GetFileSpecAtIndex(dylib_ordinal-1));
3687                                 }
3688                             }
3689                         }
3690                     }
3691                 }
3692             }
3693         }
3694
3695         // Must reset this in case it was mutated above!
3696         nlist_data_offset = 0;
3697 #endif
3698
3699         if (nlist_data.GetByteSize() > 0)
3700         {
3701
3702             // If the sym array was not created while parsing the DSC unmapped
3703             // symbols, create it now.
3704             if (sym == NULL)
3705             {
3706                 sym = symtab->Resize (symtab_load_command.nsyms + m_dysymtab.nindirectsyms);
3707                 num_syms = symtab->GetNumSymbols();
3708             }
3709
3710             if (unmapped_local_symbols_found)
3711             {
3712                 assert(m_dysymtab.ilocalsym == 0);
3713                 nlist_data_offset += (m_dysymtab.nlocalsym * nlist_byte_size);
3714                 nlist_idx = m_dysymtab.nlocalsym;
3715             }
3716             else
3717             {
3718                 nlist_idx = 0;
3719             }
3720
3721             typedef std::map<ConstString, uint16_t> UndefinedNameToDescMap;
3722             typedef std::map<uint32_t, ConstString> SymbolIndexToName;
3723             UndefinedNameToDescMap undefined_name_to_desc;
3724             SymbolIndexToName reexport_shlib_needs_fixup;
3725             for (; nlist_idx < symtab_load_command.nsyms; ++nlist_idx)
3726             {
3727                 struct nlist_64 nlist;
3728                 if (!nlist_data.ValidOffsetForDataOfSize(nlist_data_offset, nlist_byte_size))
3729                     break;
3730
3731                 nlist.n_strx  = nlist_data.GetU32_unchecked(&nlist_data_offset);
3732                 nlist.n_type  = nlist_data.GetU8_unchecked (&nlist_data_offset);
3733                 nlist.n_sect  = nlist_data.GetU8_unchecked (&nlist_data_offset);
3734                 nlist.n_desc  = nlist_data.GetU16_unchecked (&nlist_data_offset);
3735                 nlist.n_value = nlist_data.GetAddress_unchecked (&nlist_data_offset);
3736
3737                 SymbolType type = eSymbolTypeInvalid;
3738                 const char *symbol_name = NULL;
3739
3740                 if (have_strtab_data)
3741                 {
3742                     symbol_name = strtab_data.PeekCStr(nlist.n_strx);
3743
3744                     if (symbol_name == NULL)
3745                     {
3746                         // No symbol should be NULL, even the symbols with no
3747                         // string values should have an offset zero which points
3748                         // to an empty C-string
3749                         Host::SystemLog (Host::eSystemLogError,
3750                                          "error: symbol[%u] has invalid string table offset 0x%x in %s, ignoring symbol\n",
3751                                          nlist_idx,
3752                                          nlist.n_strx,
3753                                          module_sp->GetFileSpec().GetPath().c_str());
3754                         continue;
3755                     }
3756                     if (symbol_name[0] == '\0')
3757                         symbol_name = NULL;
3758                 }
3759                 else
3760                 {
3761                     const addr_t str_addr = strtab_addr + nlist.n_strx;
3762                     Error str_error;
3763                     if (process->ReadCStringFromMemory(str_addr, memory_symbol_name, str_error))
3764                         symbol_name = memory_symbol_name.c_str();
3765                 }
3766                 const char *symbol_name_non_abi_mangled = NULL;
3767
3768                 SectionSP symbol_section;
3769                 lldb::addr_t symbol_byte_size = 0;
3770                 bool add_nlist = true;
3771                 bool is_gsym = false;
3772                 bool is_debug = ((nlist.n_type & N_STAB) != 0);
3773                 bool demangled_is_synthesized = false;
3774                 bool set_value = true;
3775                 assert (sym_idx < num_syms);
3776
3777                 sym[sym_idx].SetDebug (is_debug);
3778
3779                 if (is_debug)
3780                 {
3781                     switch (nlist.n_type)
3782                     {
3783                     case N_GSYM:
3784                         // global symbol: name,,NO_SECT,type,0
3785                         // Sometimes the N_GSYM value contains the address.
3786
3787                         // FIXME: In the .o files, we have a GSYM and a debug symbol for all the ObjC data.  They
3788                         // have the same address, but we want to ensure that we always find only the real symbol,
3789                         // 'cause we don't currently correctly attribute the GSYM one to the ObjCClass/Ivar/MetaClass
3790                         // symbol type.  This is a temporary hack to make sure the ObjectiveC symbols get treated
3791                         // correctly.  To do this right, we should coalesce all the GSYM & global symbols that have the
3792                         // same address.
3793                         is_gsym = true;
3794                         sym[sym_idx].SetExternal(true);
3795
3796                         if (symbol_name && symbol_name[0] == '_' && symbol_name[1] ==  'O')
3797                         {
3798                             llvm::StringRef symbol_name_ref(symbol_name);
3799                             if (symbol_name_ref.startswith(g_objc_v2_prefix_class))
3800                             {
3801                                 symbol_name_non_abi_mangled = symbol_name + 1;
3802                                 symbol_name = symbol_name + g_objc_v2_prefix_class.size();
3803                                 type = eSymbolTypeObjCClass;
3804                                 demangled_is_synthesized = true;
3805
3806                             }
3807                             else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass))
3808                             {
3809                                 symbol_name_non_abi_mangled = symbol_name + 1;
3810                                 symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size();
3811                                 type = eSymbolTypeObjCMetaClass;
3812                                 demangled_is_synthesized = true;
3813                             }
3814                             else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar))
3815                             {
3816                                 symbol_name_non_abi_mangled = symbol_name + 1;
3817                                 symbol_name = symbol_name + g_objc_v2_prefix_ivar.size();
3818                                 type = eSymbolTypeObjCIVar;
3819                                 demangled_is_synthesized = true;
3820                             }
3821                         }
3822                         else
3823                         {
3824                             if (nlist.n_value != 0)
3825                                 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3826                             type = eSymbolTypeData;
3827                         }
3828                         break;
3829
3830                     case N_FNAME:
3831                         // procedure name (f77 kludge): name,,NO_SECT,0,0
3832                         type = eSymbolTypeCompiler;
3833                         break;
3834
3835                     case N_FUN:
3836                         // procedure: name,,n_sect,linenumber,address
3837                         if (symbol_name)
3838                         {
3839                             type = eSymbolTypeCode;
3840                             symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3841
3842                             N_FUN_addr_to_sym_idx.insert(std::make_pair(nlist.n_value, sym_idx));
3843                             // We use the current number of symbols in the symbol table in lieu of
3844                             // using nlist_idx in case we ever start trimming entries out
3845                             N_FUN_indexes.push_back(sym_idx);
3846                         }
3847                         else
3848                         {
3849                             type = eSymbolTypeCompiler;
3850
3851                             if ( !N_FUN_indexes.empty() )
3852                             {
3853                                 // Copy the size of the function into the original STAB entry so we don't have
3854                                 // to hunt for it later
3855                                 symtab->SymbolAtIndex(N_FUN_indexes.back())->SetByteSize(nlist.n_value);
3856                                 N_FUN_indexes.pop_back();
3857                                 // We don't really need the end function STAB as it contains the size which
3858                                 // we already placed with the original symbol, so don't add it if we want a
3859                                 // minimal symbol table
3860                                 add_nlist = false;
3861                             }
3862                         }
3863                         break;
3864
3865                     case N_STSYM:
3866                         // static symbol: name,,n_sect,type,address
3867                         N_STSYM_addr_to_sym_idx.insert(std::make_pair(nlist.n_value, sym_idx));
3868                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3869                         if (symbol_name && symbol_name[0])
3870                         {
3871                             type = ObjectFile::GetSymbolTypeFromName(symbol_name+1, eSymbolTypeData);
3872                         }
3873                         break;
3874
3875                     case N_LCSYM:
3876                         // .lcomm symbol: name,,n_sect,type,address
3877                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3878                         type = eSymbolTypeCommonBlock;
3879                         break;
3880
3881                     case N_BNSYM:
3882                         // We use the current number of symbols in the symbol table in lieu of
3883                         // using nlist_idx in case we ever start trimming entries out
3884                         // Skip these if we want minimal symbol tables
3885                         add_nlist = false;
3886                         break;
3887
3888                     case N_ENSYM:
3889                         // Set the size of the N_BNSYM to the terminating index of this N_ENSYM
3890                         // so that we can always skip the entire symbol if we need to navigate
3891                         // more quickly at the source level when parsing STABS
3892                         // Skip these if we want minimal symbol tables
3893                         add_nlist = false;
3894                         break;
3895
3896
3897                     case N_OPT:
3898                         // emitted with gcc2_compiled and in gcc source
3899                         type = eSymbolTypeCompiler;
3900                         break;
3901
3902                     case N_RSYM:
3903                         // register sym: name,,NO_SECT,type,register
3904                         type = eSymbolTypeVariable;
3905                         break;
3906
3907                     case N_SLINE:
3908                         // src line: 0,,n_sect,linenumber,address
3909                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
3910                         type = eSymbolTypeLineEntry;
3911                         break;
3912
3913                     case N_SSYM:
3914                         // structure elt: name,,NO_SECT,type,struct_offset
3915                         type = eSymbolTypeVariableType;
3916                         break;
3917
3918                     case N_SO:
3919                         // source file name
3920                         type = eSymbolTypeSourceFile;
3921                         if (symbol_name == NULL)
3922                         {
3923                             add_nlist = false;
3924                             if (N_SO_index != UINT32_MAX)
3925                             {
3926                                 // Set the size of the N_SO to the terminating index of this N_SO
3927                                 // so that we can always skip the entire N_SO if we need to navigate
3928                                 // more quickly at the source level when parsing STABS
3929                                 symbol_ptr = symtab->SymbolAtIndex(N_SO_index);
3930                                 symbol_ptr->SetByteSize(sym_idx);
3931                                 symbol_ptr->SetSizeIsSibling(true);
3932                             }
3933                             N_NSYM_indexes.clear();
3934                             N_INCL_indexes.clear();
3935                             N_BRAC_indexes.clear();
3936                             N_COMM_indexes.clear();
3937                             N_FUN_indexes.clear();
3938                             N_SO_index = UINT32_MAX;
3939                         }
3940                         else
3941                         {
3942                             // We use the current number of symbols in the symbol table in lieu of
3943                             // using nlist_idx in case we ever start trimming entries out
3944                             const bool N_SO_has_full_path = symbol_name[0] == '/';
3945                             if (N_SO_has_full_path)
3946                             {
3947                                 if ((N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms))
3948                                 {
3949                                     // We have two consecutive N_SO entries where the first contains a directory
3950                                     // and the second contains a full path.
3951                                     sym[sym_idx - 1].GetMangled().SetValue(ConstString(symbol_name), false);
3952                                     m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1;
3953                                     add_nlist = false;
3954                                 }
3955                                 else
3956                                 {
3957                                     // This is the first entry in a N_SO that contains a directory or
3958                                     // a full path to the source file
3959                                     N_SO_index = sym_idx;
3960                                 }
3961                             }
3962                             else if ((N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms))
3963                             {
3964                                 // This is usually the second N_SO entry that contains just the filename,
3965                                 // so here we combine it with the first one if we are minimizing the symbol table
3966                                 const char *so_path = sym[sym_idx - 1].GetMangled().GetDemangledName(lldb::eLanguageTypeUnknown).AsCString();
3967                                 if (so_path && so_path[0])
3968                                 {
3969                                     std::string full_so_path (so_path);
3970                                     const size_t double_slash_pos = full_so_path.find("//");
3971                                     if (double_slash_pos != std::string::npos)
3972                                     {
3973                                         // The linker has been generating bad N_SO entries with doubled up paths
3974                                         // in the format "%s%s" where the first string in the DW_AT_comp_dir,
3975                                         // and the second is the directory for the source file so you end up with
3976                                         // a path that looks like "/tmp/src//tmp/src/"
3977                                         FileSpec so_dir(so_path, false);
3978                                         if (!so_dir.Exists())
3979                                         {
3980                                             so_dir.SetFile(&full_so_path[double_slash_pos + 1], false);
3981                                             if (so_dir.Exists())
3982                                             {
3983                                                 // Trim off the incorrect path
3984                                                 full_so_path.erase(0, double_slash_pos + 1);
3985                                             }
3986                                         }
3987                                     }
3988                                     if (*full_so_path.rbegin() != '/')
3989                                         full_so_path += '/';
3990                                     full_so_path += symbol_name;
3991                                     sym[sym_idx - 1].GetMangled().SetValue(ConstString(full_so_path.c_str()), false);
3992                                     add_nlist = false;
3993                                     m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1;
3994                                 }
3995                             }
3996                             else
3997                             {
3998                                 // This could be a relative path to a N_SO
3999                                 N_SO_index = sym_idx;
4000                             }
4001                         }
4002                         break;
4003
4004                     case N_OSO:
4005                         // object file name: name,,0,0,st_mtime
4006                         type = eSymbolTypeObjectFile;
4007                         break;
4008
4009                     case N_LSYM:
4010                         // local sym: name,,NO_SECT,type,offset
4011                         type = eSymbolTypeLocal;
4012                         break;
4013
4014                     //----------------------------------------------------------------------
4015                     // INCL scopes
4016                     //----------------------------------------------------------------------
4017                     case N_BINCL:
4018                         // include file beginning: name,,NO_SECT,0,sum
4019                         // We use the current number of symbols in the symbol table in lieu of
4020                         // using nlist_idx in case we ever start trimming entries out
4021                         N_INCL_indexes.push_back(sym_idx);
4022                         type = eSymbolTypeScopeBegin;
4023                         break;
4024
4025                     case N_EINCL:
4026                         // include file end: name,,NO_SECT,0,0
4027                         // Set the size of the N_BINCL to the terminating index of this N_EINCL
4028                         // so that we can always skip the entire symbol if we need to navigate
4029                         // more quickly at the source level when parsing STABS
4030                         if ( !N_INCL_indexes.empty() )
4031                         {
4032                             symbol_ptr = symtab->SymbolAtIndex(N_INCL_indexes.back());
4033                             symbol_ptr->SetByteSize(sym_idx + 1);
4034                             symbol_ptr->SetSizeIsSibling(true);
4035                             N_INCL_indexes.pop_back();
4036                         }
4037                         type = eSymbolTypeScopeEnd;
4038                         break;
4039
4040                     case N_SOL:
4041                         // #included file name: name,,n_sect,0,address
4042                         type = eSymbolTypeHeaderFile;
4043
4044                         // We currently don't use the header files on darwin
4045                         add_nlist = false;
4046                         break;
4047
4048                     case N_PARAMS:
4049                         // compiler parameters: name,,NO_SECT,0,0
4050                         type = eSymbolTypeCompiler;
4051                         break;
4052
4053                     case N_VERSION:
4054                         // compiler version: name,,NO_SECT,0,0
4055                         type = eSymbolTypeCompiler;
4056                         break;
4057
4058                     case N_OLEVEL:
4059                         // compiler -O level: name,,NO_SECT,0,0
4060                         type = eSymbolTypeCompiler;
4061                         break;
4062
4063                     case N_PSYM:
4064                         // parameter: name,,NO_SECT,type,offset
4065                         type = eSymbolTypeVariable;
4066                         break;
4067
4068                     case N_ENTRY:
4069                         // alternate entry: name,,n_sect,linenumber,address
4070                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
4071                         type = eSymbolTypeLineEntry;
4072                         break;
4073
4074                     //----------------------------------------------------------------------
4075                     // Left and Right Braces
4076                     //----------------------------------------------------------------------
4077                     case N_LBRAC:
4078                         // left bracket: 0,,NO_SECT,nesting level,address
4079                         // We use the current number of symbols in the symbol table in lieu of
4080                         // using nlist_idx in case we ever start trimming entries out
4081                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
4082                         N_BRAC_indexes.push_back(sym_idx);
4083                         type = eSymbolTypeScopeBegin;
4084                         break;
4085
4086                     case N_RBRAC:
4087                         // right bracket: 0,,NO_SECT,nesting level,address
4088                         // Set the size of the N_LBRAC to the terminating index of this N_RBRAC
4089                         // so that we can always skip the entire symbol if we need to navigate
4090                         // more quickly at the source level when parsing STABS
4091                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
4092                         if ( !N_BRAC_indexes.empty() )
4093                         {
4094                             symbol_ptr = symtab->SymbolAtIndex(N_BRAC_indexes.back());
4095                             symbol_ptr->SetByteSize(sym_idx + 1);
4096                             symbol_ptr->SetSizeIsSibling(true);
4097                             N_BRAC_indexes.pop_back();
4098                         }
4099                         type = eSymbolTypeScopeEnd;
4100                         break;
4101
4102                     case N_EXCL:
4103                         // deleted include file: name,,NO_SECT,0,sum
4104                         type = eSymbolTypeHeaderFile;
4105                         break;
4106
4107                     //----------------------------------------------------------------------
4108                     // COMM scopes
4109                     //----------------------------------------------------------------------
4110                     case N_BCOMM:
4111                         // begin common: name,,NO_SECT,0,0
4112                         // We use the current number of symbols in the symbol table in lieu of
4113                         // using nlist_idx in case we ever start trimming entries out
4114                         type = eSymbolTypeScopeBegin;
4115                         N_COMM_indexes.push_back(sym_idx);
4116                         break;
4117
4118                     case N_ECOML:
4119                         // end common (local name): 0,,n_sect,0,address
4120                         symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
4121                         LLVM_FALLTHROUGH;
4122
4123                     case N_ECOMM:
4124                         // end common: name,,n_sect,0,0
4125                         // Set the size of the N_BCOMM to the terminating index of this N_ECOMM/N_ECOML
4126                         // so that we can always skip the entire symbol if we need to navigate
4127                         // more quickly at the source level when parsing STABS
4128                         if ( !N_COMM_indexes.empty() )
4129                         {
4130                             symbol_ptr = symtab->SymbolAtIndex(N_COMM_indexes.back());
4131                             symbol_ptr->SetByteSize(sym_idx + 1);
4132                             symbol_ptr->SetSizeIsSibling(true);
4133                             N_COMM_indexes.pop_back();
4134                         }
4135                         type = eSymbolTypeScopeEnd;
4136                         break;
4137
4138                     case N_LENG:
4139                         // second stab entry with length information
4140                         type = eSymbolTypeAdditional;
4141                         break;
4142
4143                     default: break;
4144                     }
4145                 }
4146                 else
4147                 {
4148                     //uint8_t n_pext    = N_PEXT & nlist.n_type;
4149                     uint8_t n_type  = N_TYPE & nlist.n_type;
4150                     sym[sym_idx].SetExternal((N_EXT & nlist.n_type) != 0);
4151
4152                     switch (n_type)
4153                     {
4154                     case N_INDR:
4155                         {
4156                             const char *reexport_name_cstr = strtab_data.PeekCStr(nlist.n_value);
4157                             if (reexport_name_cstr && reexport_name_cstr[0])
4158                             {
4159                                 type = eSymbolTypeReExported;
4160                                 ConstString reexport_name(reexport_name_cstr + ((reexport_name_cstr[0] == '_') ? 1 : 0));
4161                                 sym[sym_idx].SetReExportedSymbolName(reexport_name);
4162                                 set_value = false;
4163                                 reexport_shlib_needs_fixup[sym_idx] = reexport_name;
4164                                 indirect_symbol_names.insert(ConstString(symbol_name + ((symbol_name[0] == '_') ? 1 : 0)));
4165                             }
4166                             else
4167                                 type = eSymbolTypeUndefined;
4168                         }
4169                         break;
4170
4171                     case N_UNDF:
4172                         if (symbol_name && symbol_name[0])
4173                         {
4174                             ConstString undefined_name(symbol_name + ((symbol_name[0] == '_') ? 1 : 0));
4175                             undefined_name_to_desc[undefined_name] = nlist.n_desc;
4176                         }
4177                         LLVM_FALLTHROUGH;
4178
4179                     case N_PBUD:
4180                         type = eSymbolTypeUndefined;
4181                         break;
4182
4183                     case N_ABS:
4184                         type = eSymbolTypeAbsolute;
4185                         break;
4186
4187                     case N_SECT:
4188                         {
4189                             symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
4190
4191                             if (!symbol_section)
4192                             {
4193                                 // TODO: warn about this?
4194                                 add_nlist = false;
4195                                 break;
4196                             }
4197
4198                             if (TEXT_eh_frame_sectID == nlist.n_sect)
4199                             {
4200                                 type = eSymbolTypeException;
4201                             }
4202                             else
4203                             {
4204                                 uint32_t section_type = symbol_section->Get() & SECTION_TYPE;
4205
4206                                 switch (section_type)
4207                                 {
4208                                 case S_CSTRING_LITERALS:           type = eSymbolTypeData;    break; // section with only literal C strings
4209                                 case S_4BYTE_LITERALS:             type = eSymbolTypeData;    break; // section with only 4 byte literals
4210                                 case S_8BYTE_LITERALS:             type = eSymbolTypeData;    break; // section with only 8 byte literals
4211                                 case S_LITERAL_POINTERS:           type = eSymbolTypeTrampoline; break; // section with only pointers to literals
4212                                 case S_NON_LAZY_SYMBOL_POINTERS:   type = eSymbolTypeTrampoline; break; // section with only non-lazy symbol pointers
4213                                 case S_LAZY_SYMBOL_POINTERS:       type = eSymbolTypeTrampoline; break; // section with only lazy symbol pointers
4214                                 case S_SYMBOL_STUBS:               type = eSymbolTypeTrampoline; break; // section with only symbol stubs, byte size of stub in the reserved2 field
4215                                 case S_MOD_INIT_FUNC_POINTERS:     type = eSymbolTypeCode;    break; // section with only function pointers for initialization
4216                                 case S_MOD_TERM_FUNC_POINTERS:     type = eSymbolTypeCode;    break; // section with only function pointers for termination
4217                                 case S_INTERPOSING:                type = eSymbolTypeTrampoline;  break; // section with only pairs of function pointers for interposing
4218                                 case S_16BYTE_LITERALS:            type = eSymbolTypeData;    break; // section with only 16 byte literals
4219                                 case S_DTRACE_DOF:                 type = eSymbolTypeInstrumentation; break;
4220                                 case S_LAZY_DYLIB_SYMBOL_POINTERS: type = eSymbolTypeTrampoline; break;
4221                                 default:
4222                                     switch (symbol_section->GetType())
4223                                     {
4224                                         case lldb::eSectionTypeCode:
4225                                             type = eSymbolTypeCode;
4226                                             break;
4227                                         case eSectionTypeData:
4228                                         case eSectionTypeDataCString:            // Inlined C string data
4229                                         case eSectionTypeDataCStringPointers:    // Pointers to C string data
4230                                         case eSectionTypeDataSymbolAddress:      // Address of a symbol in the symbol table
4231                                         case eSectionTypeData4:
4232                                         case eSectionTypeData8:
4233                                         case eSectionTypeData16:
4234                                             type = eSymbolTypeData;
4235                                             break;
4236                                         default:
4237                                             break;
4238                                     }
4239                                     break;
4240                                 }
4241
4242                                 if (type == eSymbolTypeInvalid)
4243                                 {
4244                                     const char *symbol_sect_name = symbol_section->GetName().AsCString();
4245                                     if (symbol_section->IsDescendant (text_section_sp.get()))
4246                                     {
4247                                         if (symbol_section->IsClear(S_ATTR_PURE_INSTRUCTIONS |
4248                                                                     S_ATTR_SELF_MODIFYING_CODE |
4249                                                                     S_ATTR_SOME_INSTRUCTIONS))
4250                                             type = eSymbolTypeData;
4251                                         else
4252                                             type = eSymbolTypeCode;
4253                                     }
4254                                     else
4255                                     if (symbol_section->IsDescendant(data_section_sp.get()) ||
4256                                         symbol_section->IsDescendant(data_dirty_section_sp.get()) ||
4257                                         symbol_section->IsDescendant(data_const_section_sp.get()))
4258                                     {
4259                                         if (symbol_sect_name && ::strstr (symbol_sect_name, "__objc") == symbol_sect_name)
4260                                         {
4261                                             type = eSymbolTypeRuntime;
4262
4263                                             if (symbol_name)
4264                                             {
4265                                                 llvm::StringRef symbol_name_ref(symbol_name);
4266                                                 if (symbol_name_ref.startswith("_OBJC_"))
4267                                                 {
4268                                                     static const llvm::StringRef g_objc_v2_prefix_class ("_OBJC_CLASS_$_");
4269                                                     static const llvm::StringRef g_objc_v2_prefix_metaclass ("_OBJC_METACLASS_$_");
4270                                                     static const llvm::StringRef g_objc_v2_prefix_ivar ("_OBJC_IVAR_$_");
4271                                                     if (symbol_name_ref.startswith(g_objc_v2_prefix_class))
4272                                                     {
4273                                                         symbol_name_non_abi_mangled = symbol_name + 1;
4274                                                         symbol_name = symbol_name + g_objc_v2_prefix_class.size();
4275                                                         type = eSymbolTypeObjCClass;
4276                                                         demangled_is_synthesized = true;
4277                                                     }
4278                                                     else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass))
4279                                                     {
4280                                                         symbol_name_non_abi_mangled = symbol_name + 1;
4281                                                         symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size();
4282                                                         type = eSymbolTypeObjCMetaClass;
4283                                                         demangled_is_synthesized = true;
4284                                                     }
4285                                                     else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar))
4286                                                     {
4287                                                         symbol_name_non_abi_mangled = symbol_name + 1;
4288                                                         symbol_name = symbol_name + g_objc_v2_prefix_ivar.size();
4289                                                         type = eSymbolTypeObjCIVar;
4290                                                         demangled_is_synthesized = true;
4291                                                     }
4292                                                 }
4293                                             }
4294                                         }
4295                                         else
4296                                         if (symbol_sect_name && ::strstr (symbol_sect_name, "__gcc_except_tab") == symbol_sect_name)
4297                                         {
4298                                             type = eSymbolTypeException;
4299                                         }
4300                                         else
4301                                         {
4302                                             type = eSymbolTypeData;
4303                                         }
4304                                     }
4305                                     else
4306                                     if (symbol_sect_name && ::strstr (symbol_sect_name, "__IMPORT") == symbol_sect_name)
4307                                     {
4308                                         type = eSymbolTypeTrampoline;
4309                                     }
4310                                     else
4311                                     if (symbol_section->IsDescendant(objc_section_sp.get()))
4312                                     {
4313                                         type = eSymbolTypeRuntime;
4314                                         if (symbol_name && symbol_name[0] == '.')
4315                                         {
4316                                             llvm::StringRef symbol_name_ref(symbol_name);
4317                                             static const llvm::StringRef g_objc_v1_prefix_class (".objc_class_name_");
4318                                             if (symbol_name_ref.startswith(g_objc_v1_prefix_class))
4319                                             {
4320                                                 symbol_name_non_abi_mangled = symbol_name;
4321                                                 symbol_name = symbol_name + g_objc_v1_prefix_class.size();
4322                                                 type = eSymbolTypeObjCClass;
4323                                                 demangled_is_synthesized = true;
4324                                             }
4325                                         }
4326                                     }
4327                                 }
4328                             }
4329                         }
4330                         break;
4331                     }
4332                 }
4333
4334                 if (add_nlist)
4335                 {
4336                     uint64_t symbol_value = nlist.n_value;
4337
4338                     if (symbol_name_non_abi_mangled)
4339                     {
4340                         sym[sym_idx].GetMangled().SetMangledName (ConstString(symbol_name_non_abi_mangled));
4341                         sym[sym_idx].GetMangled().SetDemangledName (ConstString(symbol_name));
4342                     }
4343                     else
4344                     {
4345                         bool symbol_name_is_mangled = false;
4346
4347                         if (symbol_name && symbol_name[0] == '_')
4348                         {
4349                             symbol_name_is_mangled = symbol_name[1] == '_';
4350                             symbol_name++;  // Skip the leading underscore
4351                         }
4352
4353                         if (symbol_name)
4354                         {
4355                             ConstString const_symbol_name(symbol_name);
4356                             sym[sym_idx].GetMangled().SetValue(const_symbol_name, symbol_name_is_mangled);
4357                         }
4358                     }
4359
4360                     if (is_gsym)
4361                     {
4362                         const char *gsym_name = sym[sym_idx].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled).GetCString();
4363                         if (gsym_name)
4364                             N_GSYM_name_to_sym_idx[gsym_name] = sym_idx;
4365                     }
4366
4367                     if (symbol_section)
4368                     {
4369                         const addr_t section_file_addr = symbol_section->GetFileAddress();
4370                         if (symbol_byte_size == 0 && function_starts_count > 0)
4371                         {
4372                             addr_t symbol_lookup_file_addr = nlist.n_value;
4373                             // Do an exact address match for non-ARM addresses, else get the closest since
4374                             // the symbol might be a thumb symbol which has an address with bit zero set
4375                             FunctionStarts::Entry *func_start_entry = function_starts.FindEntry (symbol_lookup_file_addr, !is_arm);
4376                             if (is_arm && func_start_entry)
4377                             {
4378                                 // Verify that the function start address is the symbol address (ARM)
4379                                 // or the symbol address + 1 (thumb)
4380                                 if (func_start_entry->addr != symbol_lookup_file_addr &&
4381                                     func_start_entry->addr != (symbol_lookup_file_addr + 1))
4382                                 {
4383                                     // Not the right entry, NULL it out...
4384                                     func_start_entry = NULL;
4385                                 }
4386                             }
4387                             if (func_start_entry)
4388                             {
4389                                 func_start_entry->data = true;
4390
4391                                 addr_t symbol_file_addr = func_start_entry->addr;
4392                                 if (is_arm)
4393                                     symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
4394
4395                                 const FunctionStarts::Entry *next_func_start_entry = function_starts.FindNextEntry (func_start_entry);
4396                                 const addr_t section_end_file_addr = section_file_addr + symbol_section->GetByteSize();
4397                                 if (next_func_start_entry)
4398                                 {
4399                                     addr_t next_symbol_file_addr = next_func_start_entry->addr;
4400                                     // Be sure the clear the Thumb address bit when we calculate the size
4401                                     // from the current and next address
4402                                     if (is_arm)
4403                                         next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
4404                                     symbol_byte_size = std::min<lldb::addr_t>(next_symbol_file_addr - symbol_file_addr, section_end_file_addr - symbol_file_addr);
4405                                 }
4406                                 else
4407                                 {
4408                                     symbol_byte_size = section_end_file_addr - symbol_file_addr;
4409                                 }
4410                             }
4411                         }
4412                         symbol_value -= section_file_addr;
4413                     }
4414
4415                     if (is_debug == false)
4416                     {
4417                         if (type == eSymbolTypeCode)
4418                         {
4419                             // See if we can find a N_FUN entry for any code symbols.
4420                             // If we do find a match, and the name matches, then we
4421                             // can merge the two into just the function symbol to avoid
4422                             // duplicate entries in the symbol table
4423                             std::pair<ValueToSymbolIndexMap::const_iterator, ValueToSymbolIndexMap::const_iterator> range;
4424                             range = N_FUN_addr_to_sym_idx.equal_range(nlist.n_value);
4425                             if (range.first != range.second)
4426                             {
4427                                 bool found_it = false;
4428                                 for (ValueToSymbolIndexMap::const_iterator pos = range.first; pos != range.second; ++pos)
4429                                 {
4430                                     if (sym[sym_idx].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled) == sym[pos->second].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled))
4431                                     {
4432                                         m_nlist_idx_to_sym_idx[nlist_idx] = pos->second;
4433                                         // We just need the flags from the linker symbol, so put these flags
4434                                         // into the N_FUN flags to avoid duplicate symbols in the symbol table
4435                                         sym[pos->second].SetExternal(sym[sym_idx].IsExternal());
4436                                         sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc);
4437                                         if (resolver_addresses.find(nlist.n_value) != resolver_addresses.end())
4438                                             sym[pos->second].SetType (eSymbolTypeResolver);
4439                                         sym[sym_idx].Clear();
4440                                         found_it = true;
4441                                         break;
4442                                     }
4443                                 }
4444                                 if (found_it)
4445                                     continue;
4446                             }
4447                             else
4448                             {
4449                                 if (resolver_addresses.find(nlist.n_value) != resolver_addresses.end())
4450                                     type = eSymbolTypeResolver;
4451                             }
4452                         }
4453                         else if (type == eSymbolTypeData          ||
4454                                  type == eSymbolTypeObjCClass     ||
4455                                  type == eSymbolTypeObjCMetaClass ||
4456                                  type == eSymbolTypeObjCIVar      )
4457                         {
4458                             // See if we can find a N_STSYM entry for any data symbols.
4459                             // If we do find a match, and the name matches, then we
4460                             // can merge the two into just the Static symbol to avoid
4461                             // duplicate entries in the symbol table
4462                             std::pair<ValueToSymbolIndexMap::const_iterator, ValueToSymbolIndexMap::const_iterator> range;
4463                             range = N_STSYM_addr_to_sym_idx.equal_range(nlist.n_value);
4464                             if (range.first != range.second)
4465                             {
4466                                 bool found_it = false;
4467                                 for (ValueToSymbolIndexMap::const_iterator pos = range.first; pos != range.second; ++pos)
4468                                 {
4469                                     if (sym[sym_idx].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled) == sym[pos->second].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled))
4470                                     {
4471                                         m_nlist_idx_to_sym_idx[nlist_idx] = pos->second;
4472                                         // We just need the flags from the linker symbol, so put these flags
4473                                         // into the N_STSYM flags to avoid duplicate symbols in the symbol table
4474                                         sym[pos->second].SetExternal(sym[sym_idx].IsExternal());
4475                                         sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc);
4476                                         sym[sym_idx].Clear();
4477                                         found_it = true;
4478                                         break;
4479                                     }
4480                                 }
4481                                 if (found_it)
4482                                     continue;
4483                             }
4484                             else
4485                             {
4486                                 // Combine N_GSYM stab entries with the non stab symbol
4487                                 const char *gsym_name = sym[sym_idx].GetMangled().GetName(lldb::eLanguageTypeUnknown, Mangled::ePreferMangled).GetCString();
4488                                 if (gsym_name)
4489                                 {
4490                                     ConstNameToSymbolIndexMap::const_iterator pos = N_GSYM_name_to_sym_idx.find(gsym_name);
4491                                     if (pos != N_GSYM_name_to_sym_idx.end())
4492                                     {
4493                                         const uint32_t GSYM_sym_idx = pos->second;
4494                                         m_nlist_idx_to_sym_idx[nlist_idx] = GSYM_sym_idx;
4495                                         // Copy the address, because often the N_GSYM address has an invalid address of zero
4496                                         // when the global is a common symbol
4497                                         sym[GSYM_sym_idx].GetAddressRef().SetSection (symbol_section);
4498                                         sym[GSYM_sym_idx].GetAddressRef().SetOffset (symbol_value);
4499                                         // We just need the flags from the linker symbol, so put these flags
4500                                         // into the N_GSYM flags to avoid duplicate symbols in the symbol table
4501                                         sym[GSYM_sym_idx].SetFlags (nlist.n_type << 16 | nlist.n_desc);
4502                                         sym[sym_idx].Clear();
4503                                         continue;
4504                                     }
4505                                 }
4506                             }
4507                         }
4508                     }
4509
4510                     sym[sym_idx].SetID (nlist_idx);
4511                     sym[sym_idx].SetType (type);
4512                     if (set_value)
4513                     {
4514                         sym[sym_idx].GetAddressRef().SetSection (symbol_section);
4515                         sym[sym_idx].GetAddressRef().SetOffset (symbol_value);
4516                     }
4517                     sym[sym_idx].SetFlags (nlist.n_type << 16 | nlist.n_desc);
4518
4519                     if (symbol_byte_size > 0)
4520                         sym[sym_idx].SetByteSize(symbol_byte_size);
4521
4522                     if (demangled_is_synthesized)
4523                         sym[sym_idx].SetDemangledNameIsSynthesized(true);
4524
4525                     ++sym_idx;
4526                 }
4527                 else
4528                 {
4529                     sym[sym_idx].Clear();
4530                 }
4531             }
4532
4533             for (const auto &pos :reexport_shlib_needs_fixup)
4534             {
4535                 const auto undef_pos = undefined_name_to_desc.find(pos.second);
4536                 if (undef_pos != undefined_name_to_desc.end())
4537                 {
4538                     const uint8_t dylib_ordinal = llvm::MachO::GET_LIBRARY_ORDINAL(undef_pos->second);
4539                     if (dylib_ordinal > 0 && dylib_ordinal < dylib_files.GetSize())
4540                         sym[pos.first].SetReExportedSymbolSharedLibrary(dylib_files.GetFileSpecAtIndex(dylib_ordinal-1));
4541                 }
4542             }
4543         }
4544
4545         uint32_t synthetic_sym_id = symtab_load_command.nsyms;
4546
4547         if (function_starts_count > 0)
4548         {
4549             uint32_t num_synthetic_function_symbols = 0;
4550             for (i=0; i<function_starts_count; ++i)
4551             {
4552                 if (function_starts.GetEntryRef (i).data == false)
4553                     ++num_synthetic_function_symbols;
4554             }
4555
4556             if (num_synthetic_function_symbols > 0)
4557             {
4558                 if (num_syms < sym_idx + num_synthetic_function_symbols)
4559                 {
4560                     num_syms = sym_idx + num_synthetic_function_symbols;
4561                     sym = symtab->Resize (num_syms);
4562                 }
4563                 for (i=0; i<function_starts_count; ++i)
4564                 {
4565                     const FunctionStarts::Entry *func_start_entry = function_starts.GetEntryAtIndex (i);
4566                     if (func_start_entry->data == false)
4567                     {
4568                         addr_t symbol_file_addr = func_start_entry->addr;
4569                         uint32_t symbol_flags = 0;
4570                         if (is_arm)
4571                         {
4572                             if (symbol_file_addr & 1)
4573                                 symbol_flags = MACHO_NLIST_ARM_SYMBOL_IS_THUMB;
4574                             symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
4575                         }
4576                         Address symbol_addr;
4577                         if (module_sp->ResolveFileAddress (symbol_file_addr, symbol_addr))
4578                         {
4579                             SectionSP symbol_section (symbol_addr.GetSection());
4580                             uint32_t symbol_byte_size = 0;
4581                             if (symbol_section)
4582                             {
4583                                 const addr_t section_file_addr = symbol_section->GetFileAddress();
4584                                 const FunctionStarts::Entry *next_func_start_entry = function_starts.FindNextEntry (func_start_entry);
4585                                 const addr_t section_end_file_addr = section_file_addr + symbol_section->GetByteSize();
4586                                 if (next_func_start_entry)
4587                                 {
4588                                     addr_t next_symbol_file_addr = next_func_start_entry->addr;
4589                                     if (is_arm)
4590                                         next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
4591                                     symbol_byte_size = std::min<lldb::addr_t>(next_symbol_file_addr - symbol_file_addr, section_end_file_addr - symbol_file_addr);
4592                                 }
4593                                 else
4594                                 {
4595                                     symbol_byte_size = section_end_file_addr - symbol_file_addr;
4596                                 }
4597                                 sym[sym_idx].SetID (synthetic_sym_id++);
4598                                 sym[sym_idx].GetMangled().SetDemangledName(GetNextSyntheticSymbolName());
4599                                 sym[sym_idx].SetType (eSymbolTypeCode);
4600                                 sym[sym_idx].SetIsSynthetic (true);
4601                                 sym[sym_idx].GetAddressRef() = symbol_addr;
4602                                 if (symbol_flags)
4603                                     sym[sym_idx].SetFlags (symbol_flags);
4604                                 if (symbol_byte_size)
4605                                     sym[sym_idx].SetByteSize (symbol_byte_size);
4606                                 ++sym_idx;
4607                             }
4608                         }
4609                     }
4610                 }
4611             }
4612         }
4613
4614         // Trim our symbols down to just what we ended up with after
4615         // removing any symbols.
4616         if (sym_idx < num_syms)
4617         {
4618             num_syms = sym_idx;
4619             sym = symtab->Resize (num_syms);
4620         }
4621
4622         // Now synthesize indirect symbols
4623         if (m_dysymtab.nindirectsyms != 0)
4624         {
4625             if (indirect_symbol_index_data.GetByteSize())
4626             {
4627                 NListIndexToSymbolIndexMap::const_iterator end_index_pos = m_nlist_idx_to_sym_idx.end();
4628
4629                 for (uint32_t sect_idx = 1; sect_idx < m_mach_sections.size(); ++sect_idx)
4630                 {
4631                     if ((m_mach_sections[sect_idx].flags & SECTION_TYPE) == S_SYMBOL_STUBS)
4632                     {
4633                         uint32_t symbol_stub_byte_size = m_mach_sections[sect_idx].reserved2;
4634                         if (symbol_stub_byte_size == 0)
4635                             continue;
4636
4637                         const uint32_t num_symbol_stubs = m_mach_sections[sect_idx].size / symbol_stub_byte_size;
4638
4639                         if (num_symbol_stubs == 0)
4640                             continue;
4641
4642                         const uint32_t symbol_stub_index_offset = m_mach_sections[sect_idx].reserved1;
4643                         for (uint32_t stub_idx = 0; stub_idx < num_symbol_stubs; ++stub_idx)
4644                         {
4645                             const uint32_t symbol_stub_index = symbol_stub_index_offset + stub_idx;
4646                             const lldb::addr_t symbol_stub_addr = m_mach_sections[sect_idx].addr + (stub_idx * symbol_stub_byte_size);
4647                             lldb::offset_t symbol_stub_offset = symbol_stub_index * 4;
4648                             if (indirect_symbol_index_data.ValidOffsetForDataOfSize(symbol_stub_offset, 4))
4649                             {
4650                                 const uint32_t stub_sym_id = indirect_symbol_index_data.GetU32 (&symbol_stub_offset);
4651                                 if (stub_sym_id & (INDIRECT_SYMBOL_ABS | INDIRECT_SYMBOL_LOCAL))
4652                                     continue;
4653
4654                                 NListIndexToSymbolIndexMap::const_iterator index_pos = m_nlist_idx_to_sym_idx.find (stub_sym_id);
4655                                 Symbol *stub_symbol = NULL;
4656                                 if (index_pos != end_index_pos)
4657                                 {
4658                                     // We have a remapping from the original nlist index to
4659                                     // a current symbol index, so just look this up by index
4660                                     stub_symbol = symtab->SymbolAtIndex (index_pos->second);
4661                                 }
4662                                 else
4663                                 {
4664                                     // We need to lookup a symbol using the original nlist
4665                                     // symbol index since this index is coming from the
4666                                     // S_SYMBOL_STUBS
4667                                     stub_symbol = symtab->FindSymbolByID (stub_sym_id);
4668                                 }
4669
4670                                 if (stub_symbol)
4671                                 {
4672                                     Address so_addr(symbol_stub_addr, section_list);
4673
4674                                     if (stub_symbol->GetType() == eSymbolTypeUndefined)
4675                                     {
4676                                         // Change the external symbol into a trampoline that makes sense
4677                                         // These symbols were N_UNDF N_EXT, and are useless to us, so we
4678                                         // can re-use them so we don't have to make up a synthetic symbol
4679                                         // for no good reason.
4680                                         if (resolver_addresses.find(symbol_stub_addr) == resolver_addresses.end())
4681                                             stub_symbol->SetType (eSymbolTypeTrampoline);
4682                                         else
4683                                             stub_symbol->SetType (eSymbolTypeResolver);
4684                                         stub_symbol->SetExternal (false);
4685                                         stub_symbol->GetAddressRef() = so_addr;
4686                                         stub_symbol->SetByteSize (symbol_stub_byte_size);
4687                                     }
4688                                     else
4689                                     {
4690                                         // Make a synthetic symbol to describe the trampoline stub
4691                                         Mangled stub_symbol_mangled_name(stub_symbol->GetMangled());
4692                                         if (sym_idx >= num_syms)
4693                                         {
4694                                             sym = symtab->Resize (++num_syms);
4695                                             stub_symbol = NULL;  // this pointer no longer valid
4696                                         }
4697                                         sym[sym_idx].SetID (synthetic_sym_id++);
4698                                         sym[sym_idx].GetMangled() = stub_symbol_mangled_name;
4699                                         if (resolver_addresses.find(symbol_stub_addr) == resolver_addresses.end())
4700                                             sym[sym_idx].SetType (eSymbolTypeTrampoline);
4701                                         else
4702                                             sym[sym_idx].SetType (eSymbolTypeResolver);
4703                                         sym[sym_idx].SetIsSynthetic (true);
4704                                         sym[sym_idx].GetAddressRef() = so_addr;
4705                                         sym[sym_idx].SetByteSize (symbol_stub_byte_size);
4706                                         ++sym_idx;
4707                                     }
4708                                 }
4709                                 else
4710                                 {
4711                                     if (log)
4712                                         log->Warning ("symbol stub referencing symbol table symbol %u that isn't in our minimal symbol table, fix this!!!", stub_sym_id);
4713                                 }
4714                             }
4715                         }
4716                     }
4717                 }
4718             }
4719         }
4720
4721         if (!trie_entries.empty())
4722         {
4723             for (const auto &e : trie_entries)
4724             {
4725                 if (e.entry.import_name)
4726                 {
4727                     // Only add indirect symbols from the Trie entries if we
4728                     // didn't have a N_INDR nlist entry for this already
4729                     if (indirect_symbol_names.find(e.entry.name) == indirect_symbol_names.end())
4730                     {
4731                         // Make a synthetic symbol to describe re-exported symbol.
4732                         if (sym_idx >= num_syms)
4733                             sym = symtab->Resize (++num_syms);
4734                         sym[sym_idx].SetID (synthetic_sym_id++);
4735                         sym[sym_idx].GetMangled() = Mangled(e.entry.name);
4736                         sym[sym_idx].SetType (eSymbolTypeReExported);
4737                         sym[sym_idx].SetIsSynthetic (true);
4738                         sym[sym_idx].SetReExportedSymbolName(e.entry.import_name);
4739                         if (e.entry.other > 0 && e.entry.other <= dylib_files.GetSize())
4740                         {
4741                             sym[sym_idx].SetReExportedSymbolSharedLibrary(dylib_files.GetFileSpecAtIndex(e.entry.other-1));
4742                         }
4743                         ++sym_idx;
4744                     }
4745                 }
4746             }
4747         }
4748
4749 //        StreamFile s(stdout, false);
4750 //        s.Printf ("Symbol table before CalculateSymbolSizes():\n");
4751 //        symtab->Dump(&s, NULL, eSortOrderNone);
4752         // Set symbol byte sizes correctly since mach-o nlist entries don't have sizes
4753         symtab->CalculateSymbolSizes();
4754
4755 //        s.Printf ("Symbol table after CalculateSymbolSizes():\n");
4756 //        symtab->Dump(&s, NULL, eSortOrderNone);
4757
4758         return symtab->GetNumSymbols();
4759     }
4760     return 0;
4761 }
4762
4763 void
4764 ObjectFileMachO::Dump (Stream *s)
4765 {
4766     ModuleSP module_sp(GetModule());
4767     if (module_sp)
4768     {
4769         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
4770         s->Printf("%p: ", static_cast<void*>(this));
4771         s->Indent();
4772         if (m_header.magic == MH_MAGIC_64 || m_header.magic == MH_CIGAM_64)
4773             s->PutCString("ObjectFileMachO64");
4774         else
4775             s->PutCString("ObjectFileMachO32");
4776
4777         ArchSpec header_arch;
4778         GetArchitecture(header_arch);
4779
4780         *s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n";
4781
4782         SectionList *sections = GetSectionList();
4783         if (sections)
4784             sections->Dump(s, NULL, true, UINT32_MAX);
4785
4786         if (m_symtab_ap.get())
4787             m_symtab_ap->Dump(s, NULL, eSortOrderNone);
4788     }
4789 }
4790
4791 bool
4792 ObjectFileMachO::GetUUID (const llvm::MachO::mach_header &header,
4793                           const lldb_private::DataExtractor &data,
4794                           lldb::offset_t lc_offset,
4795                           lldb_private::UUID& uuid)
4796 {
4797     uint32_t i;
4798     struct uuid_command load_cmd;
4799
4800     lldb::offset_t offset = lc_offset;
4801     for (i=0; i<header.ncmds; ++i)
4802     {
4803         const lldb::offset_t cmd_offset = offset;
4804         if (data.GetU32(&offset, &load_cmd, 2) == NULL)
4805             break;
4806
4807         if (load_cmd.cmd == LC_UUID)
4808         {
4809             const uint8_t *uuid_bytes = data.PeekData(offset, 16);
4810
4811             if (uuid_bytes)
4812             {
4813                 // OpenCL on Mac OS X uses the same UUID for each of its object files.
4814                 // We pretend these object files have no UUID to prevent crashing.
4815
4816                 const uint8_t opencl_uuid[] = { 0x8c, 0x8e, 0xb3, 0x9b,
4817                     0x3b, 0xa8,
4818                     0x4b, 0x16,
4819                     0xb6, 0xa4,
4820                     0x27, 0x63, 0xbb, 0x14, 0xf0, 0x0d };
4821
4822                 if (!memcmp(uuid_bytes, opencl_uuid, 16))
4823                     return false;
4824
4825                 uuid.SetBytes (uuid_bytes);
4826                 return true;
4827             }
4828             return false;
4829         }
4830         offset = cmd_offset + load_cmd.cmdsize;
4831     }
4832     return false;
4833 }
4834
4835 bool
4836 ObjectFileMachO::GetArchitecture (const llvm::MachO::mach_header &header,
4837                                   const lldb_private::DataExtractor &data,
4838                                   lldb::offset_t lc_offset,
4839                                   ArchSpec &arch)
4840 {
4841     arch.SetArchitecture (eArchTypeMachO, header.cputype, header.cpusubtype);
4842
4843     if (arch.IsValid())
4844     {
4845         llvm::Triple &triple = arch.GetTriple();
4846
4847         // Set OS to an unspecified unknown or a "*" so it can match any OS
4848         triple.setOS(llvm::Triple::UnknownOS);
4849         triple.setOSName(llvm::StringRef());
4850
4851         if (header.filetype == MH_PRELOAD)
4852         {
4853             if (header.cputype == CPU_TYPE_ARM)
4854             {
4855                 // If this is a 32-bit arm binary, and it's a standalone binary,
4856                 // force the Vendor to Apple so we don't accidentally pick up
4857                 // the generic armv7 ABI at runtime.  Apple's armv7 ABI always uses
4858                 // r7 for the frame pointer register; most other armv7 ABIs use a
4859                 // combination of r7 and r11.
4860                 triple.setVendor(llvm::Triple::Apple);
4861             }
4862             else
4863             {
4864                 // Set vendor to an unspecified unknown or a "*" so it can match any vendor
4865                 // This is required for correct behavior of EFI debugging on x86_64
4866                 triple.setVendor(llvm::Triple::UnknownVendor);
4867                 triple.setVendorName(llvm::StringRef());
4868             }
4869             return true;
4870         }
4871         else
4872         {
4873             struct load_command load_cmd;
4874
4875             lldb::offset_t offset = lc_offset;
4876             for (uint32_t i=0; i<header.ncmds; ++i)
4877             {
4878                 const lldb::offset_t cmd_offset = offset;
4879                 if (data.GetU32(&offset, &load_cmd, 2) == NULL)
4880                     break;
4881
4882                 switch (load_cmd.cmd)
4883                 {
4884                     case llvm::MachO::LC_VERSION_MIN_IPHONEOS:
4885                         triple.setOS (llvm::Triple::IOS);
4886                         return true;
4887
4888                     case llvm::MachO::LC_VERSION_MIN_MACOSX:
4889                         triple.setOS (llvm::Triple::MacOSX);
4890                         return true;
4891
4892                     case llvm::MachO::LC_VERSION_MIN_TVOS:
4893                         triple.setOS (llvm::Triple::TvOS);
4894                         return true;
4895
4896                     case llvm::MachO::LC_VERSION_MIN_WATCHOS:
4897                         triple.setOS (llvm::Triple::WatchOS);
4898                         return true;
4899
4900                     default:
4901                         break;
4902                 }
4903
4904                 offset = cmd_offset + load_cmd.cmdsize;
4905             }
4906
4907             if (header.filetype != MH_KEXT_BUNDLE)
4908             {
4909                 // We didn't find a LC_VERSION_MIN load command and this isn't a KEXT
4910                 // so lets not say our Vendor is Apple, leave it as an unspecified unknown
4911                 triple.setVendor(llvm::Triple::UnknownVendor);
4912                 triple.setVendorName(llvm::StringRef());
4913             }
4914         }
4915     }
4916     return arch.IsValid();
4917 }
4918
4919 bool
4920 ObjectFileMachO::GetUUID (lldb_private::UUID* uuid)
4921 {
4922     ModuleSP module_sp(GetModule());
4923     if (module_sp)
4924     {
4925         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
4926         lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
4927         return GetUUID (m_header, m_data, offset, *uuid);
4928     }
4929     return false;
4930 }
4931
4932 uint32_t
4933 ObjectFileMachO::GetDependentModules (FileSpecList& files)
4934 {
4935     uint32_t count = 0;
4936     ModuleSP module_sp(GetModule());
4937     if (module_sp)
4938     {
4939         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
4940         struct load_command load_cmd;
4941         lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
4942         std::vector<std::string> rpath_paths;
4943         std::vector<std::string> rpath_relative_paths;
4944         const bool resolve_path = false; // Don't resolve the dependent file paths since they may not reside on this system
4945         uint32_t i;
4946         for (i=0; i<m_header.ncmds; ++i)
4947         {
4948             const uint32_t cmd_offset = offset;
4949             if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
4950                 break;
4951
4952             switch (load_cmd.cmd)
4953             {
4954             case LC_RPATH:
4955             case LC_LOAD_DYLIB:
4956             case LC_LOAD_WEAK_DYLIB:
4957             case LC_REEXPORT_DYLIB:
4958             case LC_LOAD_DYLINKER:
4959             case LC_LOADFVMLIB:
4960             case LC_LOAD_UPWARD_DYLIB:
4961                 {
4962                     uint32_t name_offset = cmd_offset + m_data.GetU32(&offset);
4963                     const char *path = m_data.PeekCStr(name_offset);
4964                     if (path)
4965                     {
4966                         if (load_cmd.cmd == LC_RPATH)
4967                             rpath_paths.push_back(path);
4968                         else
4969                         {
4970                             if (path[0] == '@')
4971                             {
4972                                 if (strncmp(path, "@rpath", strlen("@rpath")) == 0)
4973                                     rpath_relative_paths.push_back(path + strlen("@rpath"));
4974                             }
4975                             else
4976                             {
4977                                 FileSpec file_spec(path, resolve_path);
4978                                 if (files.AppendIfUnique(file_spec))
4979                                     count++;
4980                             }
4981                         }
4982                     }
4983                 }
4984                 break;
4985
4986             default:
4987                 break;
4988             }
4989             offset = cmd_offset + load_cmd.cmdsize;
4990         }
4991
4992         if (!rpath_paths.empty())
4993         {
4994             // Fixup all LC_RPATH values to be absolute paths
4995             FileSpec this_file_spec(m_file);
4996             this_file_spec.ResolvePath();
4997             std::string loader_path("@loader_path");
4998             std::string executable_path("@executable_path");
4999             for (auto &rpath : rpath_paths)
5000             {
5001                 if (rpath.find(loader_path) == 0)
5002                 {
5003                     rpath.erase(0, loader_path.size());
5004                     rpath.insert(0, this_file_spec.GetDirectory().GetCString());
5005                 }
5006                 else if (rpath.find(executable_path) == 0)
5007                 {
5008                     rpath.erase(0, executable_path.size());
5009                     rpath.insert(0, this_file_spec.GetDirectory().GetCString());
5010                 }
5011             }
5012
5013             for (const auto &rpath_relative_path : rpath_relative_paths)
5014             {
5015                 for (const auto &rpath : rpath_paths)
5016                 {
5017                     std::string path = rpath;
5018                     path += rpath_relative_path;
5019                     // It is OK to resolve this path because we must find a file on
5020                     // disk for us to accept it anyway if it is rpath relative.
5021                     FileSpec file_spec(path, true);
5022                     // Remove any redundant parts of the path (like "../foo") since
5023                     // LC_RPATH values often contain "..".
5024                     file_spec.NormalizePath ();
5025                     if (file_spec.Exists() && files.AppendIfUnique(file_spec))
5026                     {
5027                         count++;
5028                         break;
5029                     }
5030                 }
5031             }
5032         }
5033     }
5034     return count;
5035 }
5036
5037 lldb_private::Address
5038 ObjectFileMachO::GetEntryPointAddress ()
5039 {
5040     // If the object file is not an executable it can't hold the entry point.  m_entry_point_address
5041     // is initialized to an invalid address, so we can just return that.
5042     // If m_entry_point_address is valid it means we've found it already, so return the cached value.
5043
5044     if (!IsExecutable() || m_entry_point_address.IsValid())
5045         return m_entry_point_address;
5046
5047     // Otherwise, look for the UnixThread or Thread command.  The data for the Thread command is given in
5048     // /usr/include/mach-o.h, but it is basically:
5049     //
5050     //  uint32_t flavor  - this is the flavor argument you would pass to thread_get_state
5051     //  uint32_t count   - this is the count of longs in the thread state data
5052     //  struct XXX_thread_state state - this is the structure from <machine/thread_status.h> corresponding to the flavor.
5053     //  <repeat this trio>
5054     //
5055     // So we just keep reading the various register flavors till we find the GPR one, then read the PC out of there.
5056     // FIXME: We will need to have a "RegisterContext data provider" class at some point that can get all the registers
5057     // out of data in this form & attach them to a given thread.  That should underlie the MacOS X User process plugin,
5058     // and we'll also need it for the MacOS X Core File process plugin.  When we have that we can also use it here.
5059     //
5060     // For now we hard-code the offsets and flavors we need:
5061     //
5062     //
5063
5064     ModuleSP module_sp(GetModule());
5065     if (module_sp)
5066     {
5067         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
5068         struct load_command load_cmd;
5069         lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
5070         uint32_t i;
5071         lldb::addr_t start_address = LLDB_INVALID_ADDRESS;
5072         bool done = false;
5073
5074         for (i=0; i<m_header.ncmds; ++i)
5075         {
5076             const lldb::offset_t cmd_offset = offset;
5077             if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
5078                 break;
5079
5080             switch (load_cmd.cmd)
5081             {
5082             case LC_UNIXTHREAD:
5083             case LC_THREAD:
5084                 {
5085                     while (offset < cmd_offset + load_cmd.cmdsize)
5086                     {
5087                         uint32_t flavor = m_data.GetU32(&offset);
5088                         uint32_t count = m_data.GetU32(&offset);
5089                         if (count == 0)
5090                         {
5091                             // We've gotten off somehow, log and exit;
5092                             return m_entry_point_address;
5093                         }
5094
5095                         switch (m_header.cputype)
5096                         {
5097                         case llvm::MachO::CPU_TYPE_ARM:
5098                            if (flavor == 1 || flavor == 9) // ARM_THREAD_STATE/ARM_THREAD_STATE32 from mach/arm/thread_status.h
5099                            {
5100                                offset += 60;  // This is the offset of pc in the GPR thread state data structure.
5101                                start_address = m_data.GetU32(&offset);
5102                                done = true;
5103                             }
5104                         break;
5105                         case llvm::MachO::CPU_TYPE_ARM64:
5106                            if (flavor == 6) // ARM_THREAD_STATE64 from mach/arm/thread_status.h
5107                            {
5108                                offset += 256;  // This is the offset of pc in the GPR thread state data structure.
5109                                start_address = m_data.GetU64(&offset);
5110                                done = true;
5111                             }
5112                         break;
5113                         case llvm::MachO::CPU_TYPE_I386:
5114                            if (flavor == 1) // x86_THREAD_STATE32 from mach/i386/thread_status.h
5115                            {
5116                                offset += 40;  // This is the offset of eip in the GPR thread state data structure.
5117                                start_address = m_data.GetU32(&offset);
5118                                done = true;
5119                             }
5120                         break;
5121                         case llvm::MachO::CPU_TYPE_X86_64:
5122                            if (flavor == 4) // x86_THREAD_STATE64 from mach/i386/thread_status.h
5123                            {
5124                                offset += 16 * 8;  // This is the offset of rip in the GPR thread state data structure.
5125                                start_address = m_data.GetU64(&offset);
5126                                done = true;
5127                             }
5128                         break;
5129                         default:
5130                             return m_entry_point_address;
5131                         }
5132                         // Haven't found the GPR flavor yet, skip over the data for this flavor:
5133                         if (done)
5134                             break;
5135                         offset += count * 4;
5136                     }
5137                 }
5138                 break;
5139             case LC_MAIN:
5140                 {
5141                     ConstString text_segment_name ("__TEXT");
5142                     uint64_t entryoffset = m_data.GetU64(&offset);
5143                     SectionSP text_segment_sp = GetSectionList()->FindSectionByName(text_segment_name);
5144                     if (text_segment_sp)
5145                     {
5146                         done = true;
5147                         start_address = text_segment_sp->GetFileAddress() + entryoffset;
5148                     }
5149                 }
5150                 break;
5151
5152             default:
5153                 break;
5154             }
5155             if (done)
5156                 break;
5157
5158             // Go to the next load command:
5159             offset = cmd_offset + load_cmd.cmdsize;
5160         }
5161
5162         if (start_address != LLDB_INVALID_ADDRESS)
5163         {
5164             // We got the start address from the load commands, so now resolve that address in the sections
5165             // of this ObjectFile:
5166             if (!m_entry_point_address.ResolveAddressUsingFileSections (start_address, GetSectionList()))
5167             {
5168                 m_entry_point_address.Clear();
5169             }
5170         }
5171         else
5172         {
5173             // We couldn't read the UnixThread load command - maybe it wasn't there.  As a fallback look for the
5174             // "start" symbol in the main executable.
5175
5176             ModuleSP module_sp (GetModule());
5177
5178             if (module_sp)
5179             {
5180                 SymbolContextList contexts;
5181                 SymbolContext context;
5182                 if (module_sp->FindSymbolsWithNameAndType(ConstString ("start"), eSymbolTypeCode, contexts))
5183                 {
5184                     if (contexts.GetContextAtIndex(0, context))
5185                         m_entry_point_address = context.symbol->GetAddress();
5186                 }
5187             }
5188         }
5189     }
5190
5191     return m_entry_point_address;
5192 }
5193
5194 lldb_private::Address
5195 ObjectFileMachO::GetHeaderAddress ()
5196 {
5197     lldb_private::Address header_addr;
5198     SectionList *section_list = GetSectionList();
5199     if (section_list)
5200     {
5201         SectionSP text_segment_sp (section_list->FindSectionByName (GetSegmentNameTEXT()));
5202         if (text_segment_sp)
5203         {
5204             header_addr.SetSection (text_segment_sp);
5205             header_addr.SetOffset (0);
5206         }
5207     }
5208     return header_addr;
5209 }
5210
5211 uint32_t
5212 ObjectFileMachO::GetNumThreadContexts ()
5213 {
5214     ModuleSP module_sp(GetModule());
5215     if (module_sp)
5216     {
5217         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
5218         if (!m_thread_context_offsets_valid)
5219         {
5220             m_thread_context_offsets_valid = true;
5221             lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
5222             FileRangeArray::Entry file_range;
5223             thread_command thread_cmd;
5224             for (uint32_t i=0; i<m_header.ncmds; ++i)
5225             {
5226                 const uint32_t cmd_offset = offset;
5227                 if (m_data.GetU32(&offset, &thread_cmd, 2) == NULL)
5228                     break;
5229
5230                 if (thread_cmd.cmd == LC_THREAD)
5231                 {
5232                     file_range.SetRangeBase (offset);
5233                     file_range.SetByteSize (thread_cmd.cmdsize - 8);
5234                     m_thread_context_offsets.Append (file_range);
5235                 }
5236                 offset = cmd_offset + thread_cmd.cmdsize;
5237             }
5238         }
5239     }
5240     return m_thread_context_offsets.GetSize();
5241 }
5242
5243 lldb::RegisterContextSP
5244 ObjectFileMachO::GetThreadContextAtIndex (uint32_t idx, lldb_private::Thread &thread)
5245 {
5246     lldb::RegisterContextSP reg_ctx_sp;
5247
5248     ModuleSP module_sp(GetModule());
5249     if (module_sp)
5250     {
5251         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
5252         if (!m_thread_context_offsets_valid)
5253             GetNumThreadContexts ();
5254
5255         const FileRangeArray::Entry *thread_context_file_range = m_thread_context_offsets.GetEntryAtIndex (idx);
5256         if (thread_context_file_range)
5257         {
5258
5259             DataExtractor data (m_data,
5260                                 thread_context_file_range->GetRangeBase(),
5261                                 thread_context_file_range->GetByteSize());
5262
5263             switch (m_header.cputype)
5264             {
5265                 case llvm::MachO::CPU_TYPE_ARM64:
5266                     reg_ctx_sp.reset (new RegisterContextDarwin_arm64_Mach (thread, data));
5267                     break;
5268
5269                 case llvm::MachO::CPU_TYPE_ARM:
5270                     reg_ctx_sp.reset (new RegisterContextDarwin_arm_Mach (thread, data));
5271                     break;
5272
5273                 case llvm::MachO::CPU_TYPE_I386:
5274                     reg_ctx_sp.reset (new RegisterContextDarwin_i386_Mach (thread, data));
5275                     break;
5276
5277                 case llvm::MachO::CPU_TYPE_X86_64:
5278                     reg_ctx_sp.reset (new RegisterContextDarwin_x86_64_Mach (thread, data));
5279                     break;
5280             }
5281         }
5282     }
5283     return reg_ctx_sp;
5284 }
5285
5286 ObjectFile::Type
5287 ObjectFileMachO::CalculateType()
5288 {
5289     switch (m_header.filetype)
5290     {
5291         case MH_OBJECT:                                         // 0x1u
5292             if (GetAddressByteSize () == 4)
5293             {
5294                 // 32 bit kexts are just object files, but they do have a valid
5295                 // UUID load command.
5296                 UUID uuid;
5297                 if (GetUUID(&uuid))
5298                 {
5299                     // this checking for the UUID load command is not enough
5300                     // we could eventually look for the symbol named
5301                     // "OSKextGetCurrentIdentifier" as this is required of kexts
5302                     if (m_strata == eStrataInvalid)
5303                         m_strata = eStrataKernel;
5304                     return eTypeSharedLibrary;
5305                 }
5306             }
5307             return eTypeObjectFile;
5308
5309         case MH_EXECUTE:            return eTypeExecutable;     // 0x2u
5310         case MH_FVMLIB:             return eTypeSharedLibrary;  // 0x3u
5311         case MH_CORE:               return eTypeCoreFile;       // 0x4u
5312         case MH_PRELOAD:            return eTypeSharedLibrary;  // 0x5u
5313         case MH_DYLIB:              return eTypeSharedLibrary;  // 0x6u
5314         case MH_DYLINKER:           return eTypeDynamicLinker;  // 0x7u
5315         case MH_BUNDLE:             return eTypeSharedLibrary;  // 0x8u
5316         case MH_DYLIB_STUB:         return eTypeStubLibrary;    // 0x9u
5317         case MH_DSYM:               return eTypeDebugInfo;      // 0xAu
5318         case MH_KEXT_BUNDLE:        return eTypeSharedLibrary;  // 0xBu
5319         default:
5320             break;
5321     }
5322     return eTypeUnknown;
5323 }
5324
5325 ObjectFile::Strata
5326 ObjectFileMachO::CalculateStrata()
5327 {
5328     switch (m_header.filetype)
5329     {
5330         case MH_OBJECT:                                  // 0x1u
5331             {
5332                 // 32 bit kexts are just object files, but they do have a valid
5333                 // UUID load command.
5334                 UUID uuid;
5335                 if (GetUUID(&uuid))
5336                 {
5337                     // this checking for the UUID load command is not enough
5338                     // we could eventually look for the symbol named
5339                     // "OSKextGetCurrentIdentifier" as this is required of kexts
5340                     if (m_type == eTypeInvalid)
5341                         m_type = eTypeSharedLibrary;
5342
5343                     return eStrataKernel;
5344                 }
5345             }
5346             return eStrataUnknown;
5347
5348         case MH_EXECUTE:                                 // 0x2u
5349             // Check for the MH_DYLDLINK bit in the flags
5350             if (m_header.flags & MH_DYLDLINK)
5351             {
5352                 return eStrataUser;
5353             }
5354             else
5355             {
5356                 SectionList *section_list = GetSectionList();
5357                 if (section_list)
5358                 {
5359                     static ConstString g_kld_section_name ("__KLD");
5360                     if (section_list->FindSectionByName(g_kld_section_name))
5361                         return eStrataKernel;
5362                 }
5363             }
5364             return eStrataRawImage;
5365
5366         case MH_FVMLIB:      return eStrataUser;         // 0x3u
5367         case MH_CORE:        return eStrataUnknown;      // 0x4u
5368         case MH_PRELOAD:     return eStrataRawImage;     // 0x5u
5369         case MH_DYLIB:       return eStrataUser;         // 0x6u
5370         case MH_DYLINKER:    return eStrataUser;         // 0x7u
5371         case MH_BUNDLE:      return eStrataUser;         // 0x8u
5372         case MH_DYLIB_STUB:  return eStrataUser;         // 0x9u
5373         case MH_DSYM:        return eStrataUnknown;      // 0xAu
5374         case MH_KEXT_BUNDLE: return eStrataKernel;       // 0xBu
5375         default:
5376             break;
5377     }
5378     return eStrataUnknown;
5379 }
5380
5381 uint32_t
5382 ObjectFileMachO::GetVersion (uint32_t *versions, uint32_t num_versions)
5383 {
5384     ModuleSP module_sp(GetModule());
5385     if (module_sp)
5386     {
5387         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
5388         struct dylib_command load_cmd;
5389         lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
5390         uint32_t version_cmd = 0;
5391         uint64_t version = 0;
5392         uint32_t i;
5393         for (i=0; i<m_header.ncmds; ++i)
5394         {
5395             const lldb::offset_t cmd_offset = offset;
5396             if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
5397                 break;
5398
5399             if (load_cmd.cmd == LC_ID_DYLIB)
5400             {
5401                 if (version_cmd == 0)
5402                 {
5403                     version_cmd = load_cmd.cmd;
5404                     if (m_data.GetU32(&offset, &load_cmd.dylib, 4) == NULL)
5405                         break;
5406                     version = load_cmd.dylib.current_version;
5407                 }
5408                 break; // Break for now unless there is another more complete version
5409                        // number load command in the future.
5410             }
5411             offset = cmd_offset + load_cmd.cmdsize;
5412         }
5413
5414         if (version_cmd == LC_ID_DYLIB)
5415         {
5416             if (versions != NULL && num_versions > 0)
5417             {
5418                 if (num_versions > 0)
5419                     versions[0] = (version & 0xFFFF0000ull) >> 16;
5420                 if (num_versions > 1)
5421                     versions[1] = (version & 0x0000FF00ull) >> 8;
5422                 if (num_versions > 2)
5423                     versions[2] = (version & 0x000000FFull);
5424                 // Fill in an remaining version numbers with invalid values
5425                 for (i=3; i<num_versions; ++i)
5426                     versions[i] = UINT32_MAX;
5427             }
5428             // The LC_ID_DYLIB load command has a version with 3 version numbers
5429             // in it, so always return 3
5430             return 3;
5431         }
5432     }
5433     return false;
5434 }
5435
5436 bool
5437 ObjectFileMachO::GetArchitecture (ArchSpec &arch)
5438 {
5439     ModuleSP module_sp(GetModule());
5440     if (module_sp)
5441     {
5442         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
5443         return GetArchitecture (m_header, m_data, MachHeaderSizeFromMagic(m_header.magic), arch);
5444     }
5445     return false;
5446 }
5447
5448 UUID
5449 ObjectFileMachO::GetProcessSharedCacheUUID (Process *process)
5450 {
5451     UUID uuid;
5452     if (process)
5453     {
5454         addr_t all_image_infos = process->GetImageInfoAddress();
5455
5456         // The address returned by GetImageInfoAddress may be the address of dyld (don't want)
5457         // or it may be the address of the dyld_all_image_infos structure (want).  The first four
5458         // bytes will be either the version field (all_image_infos) or a Mach-O file magic constant.
5459         // Version 13 and higher of dyld_all_image_infos is required to get the sharedCacheUUID field.
5460
5461         Error err;
5462         uint32_t version_or_magic = process->ReadUnsignedIntegerFromMemory (all_image_infos, 4, -1, err);
5463         if (version_or_magic != static_cast<uint32_t>(-1)
5464             && version_or_magic != MH_MAGIC
5465             && version_or_magic != MH_CIGAM
5466             && version_or_magic != MH_MAGIC_64
5467             && version_or_magic != MH_CIGAM_64
5468             && version_or_magic >= 13)
5469         {
5470             addr_t sharedCacheUUID_address = LLDB_INVALID_ADDRESS;
5471             int wordsize = process->GetAddressByteSize();
5472             if (wordsize == 8)
5473             {
5474                 sharedCacheUUID_address = all_image_infos + 160;  // sharedCacheUUID <mach-o/dyld_images.h>
5475             }
5476             if (wordsize == 4)
5477             {
5478                 sharedCacheUUID_address = all_image_infos + 84;   // sharedCacheUUID <mach-o/dyld_images.h>
5479             }
5480             if (sharedCacheUUID_address != LLDB_INVALID_ADDRESS)
5481             {
5482                 uuid_t shared_cache_uuid;
5483                 if (process->ReadMemory (sharedCacheUUID_address, shared_cache_uuid, sizeof (uuid_t), err) == sizeof (uuid_t))
5484                 {
5485                     uuid.SetBytes (shared_cache_uuid);
5486                 }
5487             }
5488         }
5489     }
5490     return uuid;
5491 }
5492
5493 UUID
5494 ObjectFileMachO::GetLLDBSharedCacheUUID ()
5495 {
5496     UUID uuid;
5497 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__))
5498     uint8_t *(*dyld_get_all_image_infos)(void);
5499     dyld_get_all_image_infos = (uint8_t*(*)()) dlsym (RTLD_DEFAULT, "_dyld_get_all_image_infos");
5500     if (dyld_get_all_image_infos)
5501     {
5502         uint8_t *dyld_all_image_infos_address = dyld_get_all_image_infos();
5503         if (dyld_all_image_infos_address)
5504         {
5505             uint32_t *version = (uint32_t*) dyld_all_image_infos_address;              // version <mach-o/dyld_images.h>
5506             if (*version >= 13)
5507             {
5508                 uuid_t *sharedCacheUUID_address = 0;
5509                 int wordsize = sizeof (uint8_t *);
5510                 if (wordsize == 8)
5511                 {
5512                     sharedCacheUUID_address = (uuid_t*) ((uint8_t*) dyld_all_image_infos_address + 160); // sharedCacheUUID <mach-o/dyld_images.h>
5513                 }
5514                 else
5515                 {
5516                     sharedCacheUUID_address = (uuid_t*) ((uint8_t*) dyld_all_image_infos_address + 84);  // sharedCacheUUID <mach-o/dyld_images.h>
5517                 }
5518                 uuid.SetBytes (sharedCacheUUID_address);
5519             }
5520         }
5521     }
5522 #endif
5523     return uuid;
5524 }
5525
5526 uint32_t
5527 ObjectFileMachO::GetMinimumOSVersion (uint32_t *versions, uint32_t num_versions)
5528 {
5529     if (m_min_os_versions.empty())
5530     {
5531         lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
5532         bool success = false;
5533         for (uint32_t i=0; success == false && i < m_header.ncmds; ++i)
5534         {
5535             const lldb::offset_t load_cmd_offset = offset;
5536
5537             version_min_command lc;
5538             if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL)
5539                 break;
5540             if (lc.cmd == llvm::MachO::LC_VERSION_MIN_MACOSX
5541                  || lc.cmd == llvm::MachO::LC_VERSION_MIN_IPHONEOS
5542                  || lc.cmd == llvm::MachO::LC_VERSION_MIN_TVOS
5543                  || lc.cmd == llvm::MachO::LC_VERSION_MIN_WATCHOS)
5544             {
5545                 if (m_data.GetU32 (&offset, &lc.version, (sizeof(lc) / sizeof(uint32_t)) - 2))
5546                 {
5547                     const uint32_t xxxx = lc.version >> 16;
5548                     const uint32_t yy = (lc.version >> 8) & 0xffu;
5549                     const uint32_t zz = lc.version  & 0xffu;
5550                     if (xxxx)
5551                     {
5552                         m_min_os_versions.push_back(xxxx);
5553                         m_min_os_versions.push_back(yy);
5554                         m_min_os_versions.push_back(zz);
5555                     }
5556                     success = true;
5557                 }
5558             }
5559             offset = load_cmd_offset + lc.cmdsize;
5560         }
5561
5562         if (success == false)
5563         {
5564             // Push an invalid value so we don't keep trying to
5565             m_min_os_versions.push_back(UINT32_MAX);
5566         }
5567     }
5568
5569     if (m_min_os_versions.size() > 1 || m_min_os_versions[0] != UINT32_MAX)
5570     {
5571         if (versions != NULL && num_versions > 0)
5572         {
5573             for (size_t i=0; i<num_versions; ++i)
5574             {
5575                 if (i < m_min_os_versions.size())
5576                     versions[i] = m_min_os_versions[i];
5577                 else
5578                     versions[i] = 0;
5579             }
5580         }
5581         return m_min_os_versions.size();
5582     }
5583     // Call the superclasses version that will empty out the data
5584     return ObjectFile::GetMinimumOSVersion (versions, num_versions);
5585 }
5586
5587 uint32_t
5588 ObjectFileMachO::GetSDKVersion(uint32_t *versions, uint32_t num_versions)
5589 {
5590     if (m_sdk_versions.empty())
5591     {
5592         lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
5593         bool success = false;
5594         for (uint32_t i=0; success == false && i < m_header.ncmds; ++i)
5595         {
5596             const lldb::offset_t load_cmd_offset = offset;
5597
5598             version_min_command lc;
5599             if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL)
5600                 break;
5601             if (lc.cmd == llvm::MachO::LC_VERSION_MIN_MACOSX
5602                 || lc.cmd == llvm::MachO::LC_VERSION_MIN_IPHONEOS
5603                 || lc.cmd == llvm::MachO::LC_VERSION_MIN_TVOS
5604                 || lc.cmd == llvm::MachO::LC_VERSION_MIN_WATCHOS)
5605             {
5606                 if (m_data.GetU32 (&offset, &lc.version, (sizeof(lc) / sizeof(uint32_t)) - 2))
5607                 {
5608                     const uint32_t xxxx = lc.sdk >> 16;
5609                     const uint32_t yy = (lc.sdk >> 8) & 0xffu;
5610                     const uint32_t zz = lc.sdk & 0xffu;
5611                     if (xxxx)
5612                     {
5613                         m_sdk_versions.push_back(xxxx);
5614                         m_sdk_versions.push_back(yy);
5615                         m_sdk_versions.push_back(zz);
5616                     }
5617                     success = true;
5618                 }
5619             }
5620             offset = load_cmd_offset + lc.cmdsize;
5621         }
5622
5623         if (success == false)
5624         {
5625             // Push an invalid value so we don't keep trying to
5626             m_sdk_versions.push_back(UINT32_MAX);
5627         }
5628     }
5629
5630     if (m_sdk_versions.size() > 1 || m_sdk_versions[0] != UINT32_MAX)
5631     {
5632         if (versions != NULL && num_versions > 0)
5633         {
5634             for (size_t i=0; i<num_versions; ++i)
5635             {
5636                 if (i < m_sdk_versions.size())
5637                     versions[i] = m_sdk_versions[i];
5638                 else
5639                     versions[i] = 0;
5640             }
5641         }
5642         return m_sdk_versions.size();
5643     }
5644     // Call the superclasses version that will empty out the data
5645     return ObjectFile::GetSDKVersion (versions, num_versions);
5646 }
5647
5648 bool
5649 ObjectFileMachO::GetIsDynamicLinkEditor()
5650 {
5651     return m_header.filetype == llvm::MachO::MH_DYLINKER;
5652 }
5653
5654 bool
5655 ObjectFileMachO::AllowAssemblyEmulationUnwindPlans ()
5656 {
5657     return m_allow_assembly_emulation_unwind_plans;
5658 }
5659
5660 //------------------------------------------------------------------
5661 // PluginInterface protocol
5662 //------------------------------------------------------------------
5663 lldb_private::ConstString
5664 ObjectFileMachO::GetPluginName()
5665 {
5666     return GetPluginNameStatic();
5667 }
5668
5669 uint32_t
5670 ObjectFileMachO::GetPluginVersion()
5671 {
5672     return 1;
5673 }
5674
5675 Section *
5676 ObjectFileMachO::GetMachHeaderSection()
5677 {
5678     // Find the first address of the mach header which is the first non-zero
5679     // file sized section whose file offset is zero. This is the base file address
5680     // of the mach-o file which can be subtracted from the vmaddr of the other
5681     // segments found in memory and added to the load address
5682     ModuleSP module_sp = GetModule();
5683     if (module_sp)
5684     {
5685         SectionList *section_list = GetSectionList ();
5686         if (section_list)
5687         {
5688             lldb::addr_t mach_base_file_addr = LLDB_INVALID_ADDRESS;
5689             const size_t num_sections = section_list->GetSize();
5690
5691             for (size_t sect_idx = 0;
5692                  sect_idx < num_sections && mach_base_file_addr == LLDB_INVALID_ADDRESS;
5693                  ++sect_idx)
5694             {
5695                 Section *section = section_list->GetSectionAtIndex (sect_idx).get();
5696                 if (section &&
5697                     section->GetFileSize() > 0 &&
5698                     section->GetFileOffset() == 0 &&
5699                     section->IsThreadSpecific() == false &&
5700                     module_sp.get() == section->GetModule().get())
5701                 {
5702                     return section;
5703                 }
5704             }
5705         }
5706     }
5707     return nullptr;
5708 }
5709
5710 lldb::addr_t
5711 ObjectFileMachO::CalculateSectionLoadAddressForMemoryImage(lldb::addr_t mach_header_load_address, const Section *mach_header_section, const Section *section)
5712 {
5713     ModuleSP module_sp = GetModule();
5714     if (module_sp && mach_header_section && section && mach_header_load_address != LLDB_INVALID_ADDRESS)
5715     {
5716         lldb::addr_t mach_header_file_addr = mach_header_section->GetFileAddress();
5717         if (mach_header_file_addr != LLDB_INVALID_ADDRESS)
5718         {
5719             if (section &&
5720                 section->GetFileSize() > 0 &&
5721                 section->IsThreadSpecific() == false &&
5722                 module_sp.get() == section->GetModule().get())
5723             {
5724                 // Ignore __LINKEDIT and __DWARF segments
5725                 if (section->GetName() == GetSegmentNameLINKEDIT())
5726                 {
5727                     // Only map __LINKEDIT if we have an in memory image and this isn't
5728                     // a kernel binary like a kext or mach_kernel.
5729                     const bool is_memory_image = (bool)m_process_wp.lock();
5730                     const Strata strata = GetStrata();
5731                     if (is_memory_image == false || strata == eStrataKernel)
5732                         return LLDB_INVALID_ADDRESS;
5733                 }
5734                 return section->GetFileAddress() - mach_header_file_addr + mach_header_load_address;
5735             }
5736         }
5737     }
5738     return LLDB_INVALID_ADDRESS;
5739 }
5740
5741 bool
5742 ObjectFileMachO::SetLoadAddress (Target &target,
5743                                  lldb::addr_t value,
5744                                  bool value_is_offset)
5745 {
5746     ModuleSP module_sp = GetModule();
5747     if (module_sp)
5748     {
5749         size_t num_loaded_sections = 0;
5750         SectionList *section_list = GetSectionList ();
5751         if (section_list)
5752         {
5753             const size_t num_sections = section_list->GetSize();
5754
5755             if (value_is_offset)
5756             {
5757                 // "value" is an offset to apply to each top level segment
5758                 for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx)
5759                 {
5760                     // Iterate through the object file sections to find all
5761                     // of the sections that size on disk (to avoid __PAGEZERO)
5762                     // and load them
5763                     SectionSP section_sp (section_list->GetSectionAtIndex (sect_idx));
5764                     if (section_sp &&
5765                         section_sp->GetFileSize() > 0 &&
5766                         section_sp->IsThreadSpecific() == false &&
5767                         module_sp.get() == section_sp->GetModule().get())
5768                     {
5769                         // Ignore __LINKEDIT and __DWARF segments
5770                         if (section_sp->GetName() == GetSegmentNameLINKEDIT())
5771                         {
5772                             // Only map __LINKEDIT if we have an in memory image and this isn't
5773                             // a kernel binary like a kext or mach_kernel.
5774                             const bool is_memory_image = (bool)m_process_wp.lock();
5775                             const Strata strata = GetStrata();
5776                             if (is_memory_image == false || strata == eStrataKernel)
5777                                 continue;
5778                         }
5779                         if (target.GetSectionLoadList().SetSectionLoadAddress (section_sp, section_sp->GetFileAddress() + value))
5780                             ++num_loaded_sections;
5781                     }
5782                 }
5783             }
5784             else
5785             {
5786                 // "value" is the new base address of the mach_header, adjust each
5787                 // section accordingly
5788
5789                 Section *mach_header_section = GetMachHeaderSection();
5790                 if (mach_header_section)
5791                 {
5792                     for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx)
5793                     {
5794                         SectionSP section_sp (section_list->GetSectionAtIndex (sect_idx));
5795
5796                         lldb::addr_t section_load_addr = CalculateSectionLoadAddressForMemoryImage(value, mach_header_section, section_sp.get());
5797                         if (section_load_addr != LLDB_INVALID_ADDRESS)
5798                         {
5799                             if (target.GetSectionLoadList().SetSectionLoadAddress (section_sp, section_load_addr))
5800                                 ++num_loaded_sections;
5801                         }
5802                     }
5803                 }
5804             }
5805         }
5806         return num_loaded_sections > 0;
5807     }
5808     return false;
5809 }
5810
5811 bool
5812 ObjectFileMachO::SaveCore (const lldb::ProcessSP &process_sp,
5813                            const FileSpec &outfile,
5814                            Error &error)
5815 {
5816     if (process_sp)
5817     {
5818         Target &target = process_sp->GetTarget();
5819         const ArchSpec target_arch = target.GetArchitecture();
5820         const llvm::Triple &target_triple = target_arch.GetTriple();
5821         if (target_triple.getVendor() == llvm::Triple::Apple &&
5822             (target_triple.getOS() == llvm::Triple::MacOSX
5823              || target_triple.getOS() == llvm::Triple::IOS
5824              || target_triple.getOS() == llvm::Triple::WatchOS
5825              || target_triple.getOS() == llvm::Triple::TvOS))
5826         {
5827             bool make_core = false;
5828             switch (target_arch.GetMachine())
5829             {
5830                 case llvm::Triple::aarch64:
5831                 case llvm::Triple::arm:
5832                 case llvm::Triple::thumb:
5833                 case llvm::Triple::x86:
5834                 case llvm::Triple::x86_64:
5835                     make_core = true;
5836                     break;
5837                 default:
5838                     error.SetErrorStringWithFormat ("unsupported core architecture: %s", target_triple.str().c_str());
5839                     break;
5840             }
5841
5842             if (make_core)
5843             {
5844                 std::vector<segment_command_64> segment_load_commands;
5845 //                uint32_t range_info_idx = 0;
5846                 MemoryRegionInfo range_info;
5847                 Error range_error = process_sp->GetMemoryRegionInfo(0, range_info);
5848                 const uint32_t addr_byte_size = target_arch.GetAddressByteSize();
5849                 const ByteOrder byte_order = target_arch.GetByteOrder();
5850                 if (range_error.Success())
5851                 {
5852                     while (range_info.GetRange().GetRangeBase() != LLDB_INVALID_ADDRESS)
5853                     {
5854                         const addr_t addr = range_info.GetRange().GetRangeBase();
5855                         const addr_t size = range_info.GetRange().GetByteSize();
5856
5857                         if (size == 0)
5858                             break;
5859
5860                         // Calculate correct protections
5861                         uint32_t prot = 0;
5862                         if (range_info.GetReadable() == MemoryRegionInfo::eYes)
5863                             prot |= VM_PROT_READ;
5864                         if (range_info.GetWritable() == MemoryRegionInfo::eYes)
5865                             prot |= VM_PROT_WRITE;
5866                         if (range_info.GetExecutable() == MemoryRegionInfo::eYes)
5867                             prot |= VM_PROT_EXECUTE;
5868
5869 //                        printf ("[%3u] [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") %c%c%c\n",
5870 //                                range_info_idx,
5871 //                                addr,
5872 //                                size,
5873 //                                (prot & VM_PROT_READ   ) ? 'r' : '-',
5874 //                                (prot & VM_PROT_WRITE  ) ? 'w' : '-',
5875 //                                (prot & VM_PROT_EXECUTE) ? 'x' : '-');
5876
5877                         if (prot != 0)
5878                         {
5879                             uint32_t cmd_type = LC_SEGMENT_64;
5880                             uint32_t segment_size = sizeof (segment_command_64);
5881                             if (addr_byte_size == 4)
5882                             {
5883                                 cmd_type = LC_SEGMENT;
5884                                 segment_size = sizeof (segment_command);
5885                             }
5886                             segment_command_64 segment = {
5887                                 cmd_type,           // uint32_t cmd;
5888                                 segment_size,       // uint32_t cmdsize;
5889                                 {0},                // char segname[16];
5890                                 addr,               // uint64_t vmaddr;    // uint32_t for 32-bit Mach-O
5891                                 size,               // uint64_t vmsize;    // uint32_t for 32-bit Mach-O
5892                                 0,                  // uint64_t fileoff;   // uint32_t for 32-bit Mach-O
5893                                 size,               // uint64_t filesize;  // uint32_t for 32-bit Mach-O
5894                                 prot,               // uint32_t maxprot;
5895                                 prot,               // uint32_t initprot;
5896                                 0,                  // uint32_t nsects;
5897                                 0 };                // uint32_t flags;
5898                             segment_load_commands.push_back(segment);
5899                         }
5900                         else
5901                         {
5902                             // No protections and a size of 1 used to be returned from old
5903                             // debugservers when we asked about a region that was past the
5904                             // last memory region and it indicates the end...
5905                             if (size == 1)
5906                                 break;
5907                         }
5908
5909                         range_error = process_sp->GetMemoryRegionInfo(range_info.GetRange().GetRangeEnd(), range_info);
5910                         if (range_error.Fail())
5911                             break;
5912                     }
5913
5914                     StreamString buffer (Stream::eBinary,
5915                                          addr_byte_size,
5916                                          byte_order);
5917
5918                     mach_header_64 mach_header;
5919                     if (addr_byte_size == 8)
5920                     {
5921                         mach_header.magic = MH_MAGIC_64;
5922                     }
5923                     else
5924                     {
5925                         mach_header.magic = MH_MAGIC;
5926                     }
5927                     mach_header.cputype = target_arch.GetMachOCPUType();
5928                     mach_header.cpusubtype = target_arch.GetMachOCPUSubType();
5929                     mach_header.filetype = MH_CORE;
5930                     mach_header.ncmds = segment_load_commands.size();
5931                     mach_header.flags = 0;
5932                     mach_header.reserved = 0;
5933                     ThreadList &thread_list = process_sp->GetThreadList();
5934                     const uint32_t num_threads = thread_list.GetSize();
5935
5936                     // Make an array of LC_THREAD data items. Each one contains
5937                     // the contents of the LC_THREAD load command. The data doesn't
5938                     // contain the load command + load command size, we will
5939                     // add the load command and load command size as we emit the data.
5940                     std::vector<StreamString> LC_THREAD_datas(num_threads);
5941                     for (auto &LC_THREAD_data : LC_THREAD_datas)
5942                     {
5943                         LC_THREAD_data.GetFlags().Set(Stream::eBinary);
5944                         LC_THREAD_data.SetAddressByteSize(addr_byte_size);
5945                         LC_THREAD_data.SetByteOrder(byte_order);
5946                     }
5947                     for (uint32_t thread_idx = 0; thread_idx < num_threads; ++thread_idx)
5948                     {
5949                         ThreadSP thread_sp (thread_list.GetThreadAtIndex(thread_idx));
5950                         if (thread_sp)
5951                         {
5952                             switch (mach_header.cputype)
5953                             {
5954                                 case llvm::MachO::CPU_TYPE_ARM64:
5955                                     RegisterContextDarwin_arm64_Mach::Create_LC_THREAD (thread_sp.get(), LC_THREAD_datas[thread_idx]);
5956                                     break;
5957
5958                                 case llvm::MachO::CPU_TYPE_ARM:
5959                                     RegisterContextDarwin_arm_Mach::Create_LC_THREAD (thread_sp.get(), LC_THREAD_datas[thread_idx]);
5960                                     break;
5961
5962                                 case llvm::MachO::CPU_TYPE_I386:
5963                                     RegisterContextDarwin_i386_Mach::Create_LC_THREAD (thread_sp.get(), LC_THREAD_datas[thread_idx]);
5964                                     break;
5965
5966                                 case llvm::MachO::CPU_TYPE_X86_64:
5967                                     RegisterContextDarwin_x86_64_Mach::Create_LC_THREAD (thread_sp.get(), LC_THREAD_datas[thread_idx]);
5968                                     break;
5969                             }
5970
5971                         }
5972                     }
5973
5974                     // The size of the load command is the size of the segments...
5975                     if (addr_byte_size == 8)
5976                     {
5977                         mach_header.sizeofcmds = segment_load_commands.size() * sizeof (struct segment_command_64);
5978                     }
5979                     else
5980                     {
5981                         mach_header.sizeofcmds = segment_load_commands.size() * sizeof (struct segment_command);
5982                     }
5983
5984                     // and the size of all LC_THREAD load command
5985                     for (const auto &LC_THREAD_data : LC_THREAD_datas)
5986                     {
5987                         ++mach_header.ncmds;
5988                         mach_header.sizeofcmds += 8 + LC_THREAD_data.GetSize();
5989                     }
5990
5991                     printf ("mach_header: 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x\n",
5992                             mach_header.magic,
5993                             mach_header.cputype,
5994                             mach_header.cpusubtype,
5995                             mach_header.filetype,
5996                             mach_header.ncmds,
5997                             mach_header.sizeofcmds,
5998                             mach_header.flags,
5999                             mach_header.reserved);
6000
6001                     // Write the mach header
6002                     buffer.PutHex32(mach_header.magic);
6003                     buffer.PutHex32(mach_header.cputype);
6004                     buffer.PutHex32(mach_header.cpusubtype);
6005                     buffer.PutHex32(mach_header.filetype);
6006                     buffer.PutHex32(mach_header.ncmds);
6007                     buffer.PutHex32(mach_header.sizeofcmds);
6008                     buffer.PutHex32(mach_header.flags);
6009                     if (addr_byte_size == 8)
6010                     {
6011                         buffer.PutHex32(mach_header.reserved);
6012                     }
6013
6014                     // Skip the mach header and all load commands and align to the next
6015                     // 0x1000 byte boundary
6016                     addr_t file_offset = buffer.GetSize() + mach_header.sizeofcmds;
6017                     if (file_offset & 0x00000fff)
6018                     {
6019                         file_offset += 0x00001000ull;
6020                         file_offset &= (~0x00001000ull + 1);
6021                     }
6022
6023                     for (auto &segment : segment_load_commands)
6024                     {
6025                         segment.fileoff = file_offset;
6026                         file_offset += segment.filesize;
6027                     }
6028
6029                     // Write out all of the LC_THREAD load commands
6030                     for (const auto &LC_THREAD_data : LC_THREAD_datas)
6031                     {
6032                         const size_t LC_THREAD_data_size = LC_THREAD_data.GetSize();
6033                         buffer.PutHex32(LC_THREAD);
6034                         buffer.PutHex32(8 + LC_THREAD_data_size); // cmd + cmdsize + data
6035                         buffer.Write(LC_THREAD_data.GetData(), LC_THREAD_data_size);
6036                     }
6037
6038                     // Write out all of the segment load commands
6039                     for (const auto &segment : segment_load_commands)
6040                     {
6041                         printf ("0x%8.8x 0x%8.8x [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") [0x%16.16" PRIx64 " 0x%16.16" PRIx64 ") 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x]\n",
6042                                 segment.cmd,
6043                                 segment.cmdsize,
6044                                 segment.vmaddr,
6045                                 segment.vmaddr + segment.vmsize,
6046                                 segment.fileoff,
6047                                 segment.filesize,
6048                                 segment.maxprot,
6049                                 segment.initprot,
6050                                 segment.nsects,
6051                                 segment.flags);
6052
6053                         buffer.PutHex32(segment.cmd);
6054                         buffer.PutHex32(segment.cmdsize);
6055                         buffer.PutRawBytes(segment.segname, sizeof(segment.segname));
6056                         if (addr_byte_size == 8)
6057                         {
6058                             buffer.PutHex64(segment.vmaddr);
6059                             buffer.PutHex64(segment.vmsize);
6060                             buffer.PutHex64(segment.fileoff);
6061                             buffer.PutHex64(segment.filesize);
6062                         }
6063                         else
6064                         {
6065                             buffer.PutHex32(static_cast<uint32_t>(segment.vmaddr));
6066                             buffer.PutHex32(static_cast<uint32_t>(segment.vmsize));
6067                             buffer.PutHex32(static_cast<uint32_t>(segment.fileoff));
6068                             buffer.PutHex32(static_cast<uint32_t>(segment.filesize));
6069                         }
6070                         buffer.PutHex32(segment.maxprot);
6071                         buffer.PutHex32(segment.initprot);
6072                         buffer.PutHex32(segment.nsects);
6073                         buffer.PutHex32(segment.flags);
6074                     }
6075
6076                     File core_file;
6077                     std::string core_file_path(outfile.GetPath());
6078                     error = core_file.Open(core_file_path.c_str(),
6079                                            File::eOpenOptionWrite    |
6080                                            File::eOpenOptionTruncate |
6081                                            File::eOpenOptionCanCreate);
6082                     if (error.Success())
6083                     {
6084                         // Read 1 page at a time
6085                         uint8_t bytes[0x1000];
6086                         // Write the mach header and load commands out to the core file
6087                         size_t bytes_written = buffer.GetString().size();
6088                         error = core_file.Write(buffer.GetString().data(), bytes_written);
6089                         if (error.Success())
6090                         {
6091                             // Now write the file data for all memory segments in the process
6092                             for (const auto &segment : segment_load_commands)
6093                             {
6094                                 if (core_file.SeekFromStart(segment.fileoff) == -1)
6095                                 {
6096                                     error.SetErrorStringWithFormat("unable to seek to offset 0x%" PRIx64 " in '%s'", segment.fileoff, core_file_path.c_str());
6097                                     break;
6098                                 }
6099
6100                                 printf ("Saving %" PRId64 " bytes of data for memory region at 0x%" PRIx64 "\n", segment.vmsize, segment.vmaddr);
6101                                 addr_t bytes_left = segment.vmsize;
6102                                 addr_t addr = segment.vmaddr;
6103                                 Error memory_read_error;
6104                                 while (bytes_left > 0 && error.Success())
6105                                 {
6106                                     const size_t bytes_to_read = bytes_left > sizeof(bytes) ? sizeof(bytes) : bytes_left;
6107                                     const size_t bytes_read = process_sp->ReadMemory(addr, bytes, bytes_to_read, memory_read_error);
6108                                     if (bytes_read == bytes_to_read)
6109                                     {
6110                                         size_t bytes_written = bytes_read;
6111                                         error = core_file.Write(bytes, bytes_written);
6112                                         bytes_left -= bytes_read;
6113                                         addr += bytes_read;
6114                                     }
6115                                     else
6116                                     {
6117                                         // Some pages within regions are not readable, those
6118                                         // should be zero filled
6119                                         memset (bytes, 0, bytes_to_read);
6120                                         size_t bytes_written = bytes_to_read;
6121                                         error = core_file.Write(bytes, bytes_written);
6122                                         bytes_left -= bytes_to_read;
6123                                         addr += bytes_to_read;
6124                                     }
6125                                 }
6126                             }
6127                         }
6128                     }
6129                 }
6130                 else
6131                 {
6132                     error.SetErrorString("process doesn't support getting memory region info");
6133                 }
6134             }
6135             return true; // This is the right plug to handle saving core files for this process
6136         }
6137     }
6138     return false;
6139 }