contrib/llvm/tools/lldb/source/Symbol/ObjectFile.cpp

   1 //===-- ObjectFile.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 #include "lldb/Symbol/ObjectFile.h"
  11 #include "Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h"
  12 #include "lldb/Core/Module.h"
  13 #include "lldb/Core/ModuleSpec.h"
  14 #include "lldb/Core/PluginManager.h"
  15 #include "lldb/Core/Section.h"
  16 #include "lldb/Core/Timer.h"
  17 #include "lldb/Symbol/ObjectContainer.h"
  18 #include "lldb/Symbol/SymbolFile.h"
  19 #include "lldb/Target/Process.h"
  20 #include "lldb/Target/RegisterContext.h"
  21 #include "lldb/Target/SectionLoadList.h"
  22 #include "lldb/Target/Target.h"
  23 #include "lldb/Utility/DataBuffer.h"
  24 #include "lldb/Utility/DataBufferHeap.h"
  25 #include "lldb/Utility/DataBufferLLVM.h"
  26 #include "lldb/Utility/Log.h"
  27 #include "lldb/Utility/RegularExpression.h"
  28 #include "lldb/lldb-private.h"
  29
  30 using namespace lldb;
  31 using namespace lldb_private;
  32
  33 ObjectFileSP
  34 ObjectFile::FindPlugin(const lldb::ModuleSP &module_sp, const FileSpec *file,
  35                        lldb::offset_t file_offset, lldb::offset_t file_size,
  36                        DataBufferSP &data_sp, lldb::offset_t &data_offset) {
  37   ObjectFileSP object_file_sp;
  38
  39   if (module_sp) {
  40     Timer scoped_timer(
  41         LLVM_PRETTY_FUNCTION,
  42         "ObjectFile::FindPlugin (module = %s, file = %p, file_offset = "
  43         "0x%8.8" PRIx64 ", file_size = 0x%8.8" PRIx64 ")",
  44         module_sp->GetFileSpec().GetPath().c_str(),
  45         static_cast<const void *>(file), static_cast<uint64_t>(file_offset),
  46         static_cast<uint64_t>(file_size));
  47     if (file) {
  48       FileSpec archive_file;
  49       ObjectContainerCreateInstance create_object_container_callback;
  50
  51       const bool file_exists = file->Exists();
  52       if (!data_sp) {
  53         // We have an object name which most likely means we have
  54         // a .o file in a static archive (.a file). Try and see if
  55         // we have a cached archive first without reading any data
  56         // first
  57         if (file_exists && module_sp->GetObjectName()) {
  58           for (uint32_t idx = 0;
  59                (create_object_container_callback =
  60                     PluginManager::GetObjectContainerCreateCallbackAtIndex(
  61                         idx)) != nullptr;
  62                ++idx) {
  63             std::unique_ptr<ObjectContainer> object_container_ap(
  64                 create_object_container_callback(module_sp, data_sp,
  65                                                  data_offset, file, file_offset,
  66                                                  file_size));
  67
  68             if (object_container_ap.get())
  69               object_file_sp = object_container_ap->GetObjectFile(file);
  70
  71             if (object_file_sp.get())
  72               return object_file_sp;
  73           }
  74         }
  75         // Ok, we didn't find any containers that have a named object, now
  76         // lets read the first 512 bytes from the file so the object file
  77         // and object container plug-ins can use these bytes to see if they
  78         // can parse this file.
  79         if (file_size > 0) {
  80           data_sp =
  81               DataBufferLLVM::CreateSliceFromPath(file->GetPath(), 512, file_offset);
  82           data_offset = 0;
  83         }
  84       }
  85
  86       if (!data_sp || data_sp->GetByteSize() == 0) {
  87         // Check for archive file with format "/path/to/archive.a(object.o)"
  88         char path_with_object[PATH_MAX * 2];
  89         module_sp->GetFileSpec().GetPath(path_with_object,
  90                                          sizeof(path_with_object));
  91
  92         ConstString archive_object;
  93         const bool must_exist = true;
  94         if (ObjectFile::SplitArchivePathWithObject(
  95                 path_with_object, archive_file, archive_object, must_exist)) {
  96           file_size = archive_file.GetByteSize();
  97           if (file_size > 0) {
  98             file = &archive_file;
  99             module_sp->SetFileSpecAndObjectName(archive_file, archive_object);
 100             // Check if this is a object container by iterating through all
 101             // object
 102             // container plugin instances and then trying to get an object file
 103             // from the container plugins since we had a name. Also, don't read
 104             // ANY data in case there is data cached in the container plug-ins
 105             // (like BSD archives caching the contained objects within an file).
 106             for (uint32_t idx = 0;
 107                  (create_object_container_callback =
 108                       PluginManager::GetObjectContainerCreateCallbackAtIndex(
 109                           idx)) != nullptr;
 110                  ++idx) {
 111               std::unique_ptr<ObjectContainer> object_container_ap(
 112                   create_object_container_callback(module_sp, data_sp,
 113                                                    data_offset, file,
 114                                                    file_offset, file_size));
 115
 116               if (object_container_ap.get())
 117                 object_file_sp = object_container_ap->GetObjectFile(file);
 118
 119               if (object_file_sp.get())
 120                 return object_file_sp;
 121             }
 122             // We failed to find any cached object files in the container
 123             // plug-ins, so lets read the first 512 bytes and try again below...
 124             data_sp = DataBufferLLVM::CreateSliceFromPath(archive_file.GetPath(),
 125                                                      512, file_offset);
 126           }
 127         }
 128       }
 129
 130       if (data_sp && data_sp->GetByteSize() > 0) {
 131         // Check if this is a normal object file by iterating through
 132         // all object file plugin instances.
 133         ObjectFileCreateInstance create_object_file_callback;
 134         for (uint32_t idx = 0;
 135              (create_object_file_callback =
 136                   PluginManager::GetObjectFileCreateCallbackAtIndex(idx)) !=
 137              nullptr;
 138              ++idx) {
 139           object_file_sp.reset(create_object_file_callback(
 140               module_sp, data_sp, data_offset, file, file_offset, file_size));
 141           if (object_file_sp.get())
 142             return object_file_sp;
 143         }
 144
 145         // Check if this is a object container by iterating through
 146         // all object container plugin instances and then trying to get
 147         // an object file from the container.
 148         for (uint32_t idx = 0;
 149              (create_object_container_callback =
 150                   PluginManager::GetObjectContainerCreateCallbackAtIndex(
 151                       idx)) != nullptr;
 152              ++idx) {
 153           std::unique_ptr<ObjectContainer> object_container_ap(
 154               create_object_container_callback(module_sp, data_sp, data_offset,
 155                                                file, file_offset, file_size));
 156
 157           if (object_container_ap.get())
 158             object_file_sp = object_container_ap->GetObjectFile(file);
 159
 160           if (object_file_sp.get())
 161             return object_file_sp;
 162         }
 163       }
 164     }
 165   }
 166   // We didn't find it, so clear our shared pointer in case it
 167   // contains anything and return an empty shared pointer
 168   object_file_sp.reset();
 169   return object_file_sp;
 170 }
 171
 172 ObjectFileSP ObjectFile::FindPlugin(const lldb::ModuleSP &module_sp,
 173                                     const ProcessSP &process_sp,
 174                                     lldb::addr_t header_addr,
 175                                     DataBufferSP &data_sp) {
 176   ObjectFileSP object_file_sp;
 177
 178   if (module_sp) {
 179     Timer scoped_timer(LLVM_PRETTY_FUNCTION, "ObjectFile::FindPlugin (module = "
 180                                              "%s, process = %p, header_addr = "
 181                                              "0x%" PRIx64 ")",
 182                        module_sp->GetFileSpec().GetPath().c_str(),
 183                        static_cast<void *>(process_sp.get()), header_addr);
 184     uint32_t idx;
 185
 186     // Check if this is a normal object file by iterating through
 187     // all object file plugin instances.
 188     ObjectFileCreateMemoryInstance create_callback;
 189     for (idx = 0;
 190          (create_callback =
 191               PluginManager::GetObjectFileCreateMemoryCallbackAtIndex(idx)) !=
 192          nullptr;
 193          ++idx) {
 194       object_file_sp.reset(
 195           create_callback(module_sp, data_sp, process_sp, header_addr));
 196       if (object_file_sp.get())
 197         return object_file_sp;
 198     }
 199   }
 200
 201   // We didn't find it, so clear our shared pointer in case it
 202   // contains anything and return an empty shared pointer
 203   object_file_sp.reset();
 204   return object_file_sp;
 205 }
 206
 207 size_t ObjectFile::GetModuleSpecifications(const FileSpec &file,
 208                                            lldb::offset_t file_offset,
 209                                            lldb::offset_t file_size,
 210                                            ModuleSpecList &specs) {
 211   DataBufferSP data_sp = DataBufferLLVM::CreateSliceFromPath(file.GetPath(), 512, file_offset);
 212   if (data_sp) {
 213     if (file_size == 0) {
 214       const lldb::offset_t actual_file_size = file.GetByteSize();
 215       if (actual_file_size > file_offset)
 216         file_size = actual_file_size - file_offset;
 217     }
 218     return ObjectFile::GetModuleSpecifications(file,        // file spec
 219                                                data_sp,     // data bytes
 220                                                0,           // data offset
 221                                                file_offset, // file offset
 222                                                file_size,   // file length
 223                                                specs);
 224   }
 225   return 0;
 226 }
 227
 228 size_t ObjectFile::GetModuleSpecifications(
 229     const lldb_private::FileSpec &file, lldb::DataBufferSP &data_sp,
 230     lldb::offset_t data_offset, lldb::offset_t file_offset,
 231     lldb::offset_t file_size, lldb_private::ModuleSpecList &specs) {
 232   const size_t initial_count = specs.GetSize();
 233   ObjectFileGetModuleSpecifications callback;
 234   uint32_t i;
 235   // Try the ObjectFile plug-ins
 236   for (i = 0;
 237        (callback =
 238             PluginManager::GetObjectFileGetModuleSpecificationsCallbackAtIndex(
 239                 i)) != nullptr;
 240        ++i) {
 241     if (callback(file, data_sp, data_offset, file_offset, file_size, specs) > 0)
 242       return specs.GetSize() - initial_count;
 243   }
 244
 245   // Try the ObjectContainer plug-ins
 246   for (i = 0;
 247        (callback = PluginManager::
 248             GetObjectContainerGetModuleSpecificationsCallbackAtIndex(i)) !=
 249        nullptr;
 250        ++i) {
 251     if (callback(file, data_sp, data_offset, file_offset, file_size, specs) > 0)
 252       return specs.GetSize() - initial_count;
 253   }
 254   return 0;
 255 }
 256
 257 ObjectFile::ObjectFile(const lldb::ModuleSP &module_sp,
 258                        const FileSpec *file_spec_ptr,
 259                        lldb::offset_t file_offset, lldb::offset_t length,
 260                        const lldb::DataBufferSP &data_sp,
 261                        lldb::offset_t data_offset)
 262     : ModuleChild(module_sp),
 263       m_file(), // This file could be different from the original module's file
 264       m_type(eTypeInvalid), m_strata(eStrataInvalid),
 265       m_file_offset(file_offset), m_length(length), m_data(),
 266       m_unwind_table(*this), m_process_wp(),
 267       m_memory_addr(LLDB_INVALID_ADDRESS), m_sections_ap(), m_symtab_ap(),
 268       m_synthetic_symbol_idx(0) {
 269   if (file_spec_ptr)
 270     m_file = *file_spec_ptr;
 271   if (data_sp)
 272     m_data.SetData(data_sp, data_offset, length);
 273   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
 274   if (log)
 275     log->Printf("%p ObjectFile::ObjectFile() module = %p (%s), file = %s, "
 276                 "file_offset = 0x%8.8" PRIx64 ", size = %" PRIu64,
 277                 static_cast<void *>(this), static_cast<void *>(module_sp.get()),
 278                 module_sp->GetSpecificationDescription().c_str(),
 279                 m_file ? m_file.GetPath().c_str() : "<NULL>", m_file_offset,
 280                 m_length);
 281 }
 282
 283 ObjectFile::ObjectFile(const lldb::ModuleSP &module_sp,
 284                        const ProcessSP &process_sp, lldb::addr_t header_addr,
 285                        DataBufferSP &header_data_sp)
 286     : ModuleChild(module_sp), m_file(), m_type(eTypeInvalid),
 287       m_strata(eStrataInvalid), m_file_offset(0), m_length(0), m_data(),
 288       m_unwind_table(*this), m_process_wp(process_sp),
 289       m_memory_addr(header_addr), m_sections_ap(), m_symtab_ap(),
 290       m_synthetic_symbol_idx(0) {
 291   if (header_data_sp)
 292     m_data.SetData(header_data_sp, 0, header_data_sp->GetByteSize());
 293   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
 294   if (log)
 295     log->Printf("%p ObjectFile::ObjectFile() module = %p (%s), process = %p, "
 296                 "header_addr = 0x%" PRIx64,
 297                 static_cast<void *>(this), static_cast<void *>(module_sp.get()),
 298                 module_sp->GetSpecificationDescription().c_str(),
 299                 static_cast<void *>(process_sp.get()), m_memory_addr);
 300 }
 301
 302 ObjectFile::~ObjectFile() {
 303   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
 304   if (log)
 305     log->Printf("%p ObjectFile::~ObjectFile ()\n", static_cast<void *>(this));
 306 }
 307
 308 bool ObjectFile::SetModulesArchitecture(const ArchSpec &new_arch) {
 309   ModuleSP module_sp(GetModule());
 310   if (module_sp)
 311     return module_sp->SetArchitecture(new_arch);
 312   return false;
 313 }
 314
 315 AddressClass ObjectFile::GetAddressClass(addr_t file_addr) {
 316   Symtab *symtab = GetSymtab();
 317   if (symtab) {
 318     Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr);
 319     if (symbol) {
 320       if (symbol->ValueIsAddress()) {
 321         const SectionSP section_sp(symbol->GetAddressRef().GetSection());
 322         if (section_sp) {
 323           const SectionType section_type = section_sp->GetType();
 324           switch (section_type) {
 325           case eSectionTypeInvalid:
 326             return eAddressClassUnknown;
 327           case eSectionTypeCode:
 328             return eAddressClassCode;
 329           case eSectionTypeContainer:
 330             return eAddressClassUnknown;
 331           case eSectionTypeData:
 332           case eSectionTypeDataCString:
 333           case eSectionTypeDataCStringPointers:
 334           case eSectionTypeDataSymbolAddress:
 335           case eSectionTypeData4:
 336           case eSectionTypeData8:
 337           case eSectionTypeData16:
 338           case eSectionTypeDataPointers:
 339           case eSectionTypeZeroFill:
 340           case eSectionTypeDataObjCMessageRefs:
 341           case eSectionTypeDataObjCCFStrings:
 342           case eSectionTypeGoSymtab:
 343             return eAddressClassData;
 344           case eSectionTypeDebug:
 345           case eSectionTypeDWARFDebugAbbrev:
 346           case eSectionTypeDWARFDebugAddr:
 347           case eSectionTypeDWARFDebugAranges:
 348           case eSectionTypeDWARFDebugFrame:
 349           case eSectionTypeDWARFDebugInfo:
 350           case eSectionTypeDWARFDebugLine:
 351           case eSectionTypeDWARFDebugLoc:
 352           case eSectionTypeDWARFDebugMacInfo:
 353           case eSectionTypeDWARFDebugMacro:
 354           case eSectionTypeDWARFDebugPubNames:
 355           case eSectionTypeDWARFDebugPubTypes:
 356           case eSectionTypeDWARFDebugRanges:
 357           case eSectionTypeDWARFDebugStr:
 358           case eSectionTypeDWARFDebugStrOffsets:
 359           case eSectionTypeDWARFAppleNames:
 360           case eSectionTypeDWARFAppleTypes:
 361           case eSectionTypeDWARFAppleNamespaces:
 362           case eSectionTypeDWARFAppleObjC:
 363             return eAddressClassDebug;
 364           case eSectionTypeEHFrame:
 365           case eSectionTypeARMexidx:
 366           case eSectionTypeARMextab:
 367           case eSectionTypeCompactUnwind:
 368             return eAddressClassRuntime;
 369           case eSectionTypeELFSymbolTable:
 370           case eSectionTypeELFDynamicSymbols:
 371           case eSectionTypeELFRelocationEntries:
 372           case eSectionTypeELFDynamicLinkInfo:
 373           case eSectionTypeOther:
 374             return eAddressClassUnknown;
 375           case eSectionTypeAbsoluteAddress:
 376             // In case of absolute sections decide the address class based on
 377             // the symbol
 378             // type because the section type isn't specify if it is a code or a
 379             // data
 380             // section.
 381             break;
 382           }
 383         }
 384       }
 385
 386       const SymbolType symbol_type = symbol->GetType();
 387       switch (symbol_type) {
 388       case eSymbolTypeAny:
 389         return eAddressClassUnknown;
 390       case eSymbolTypeAbsolute:
 391         return eAddressClassUnknown;
 392       case eSymbolTypeCode:
 393         return eAddressClassCode;
 394       case eSymbolTypeTrampoline:
 395         return eAddressClassCode;
 396       case eSymbolTypeResolver:
 397         return eAddressClassCode;
 398       case eSymbolTypeData:
 399         return eAddressClassData;
 400       case eSymbolTypeRuntime:
 401         return eAddressClassRuntime;
 402       case eSymbolTypeException:
 403         return eAddressClassRuntime;
 404       case eSymbolTypeSourceFile:
 405         return eAddressClassDebug;
 406       case eSymbolTypeHeaderFile:
 407         return eAddressClassDebug;
 408       case eSymbolTypeObjectFile:
 409         return eAddressClassDebug;
 410       case eSymbolTypeCommonBlock:
 411         return eAddressClassDebug;
 412       case eSymbolTypeBlock:
 413         return eAddressClassDebug;
 414       case eSymbolTypeLocal:
 415         return eAddressClassData;
 416       case eSymbolTypeParam:
 417         return eAddressClassData;
 418       case eSymbolTypeVariable:
 419         return eAddressClassData;
 420       case eSymbolTypeVariableType:
 421         return eAddressClassDebug;
 422       case eSymbolTypeLineEntry:
 423         return eAddressClassDebug;
 424       case eSymbolTypeLineHeader:
 425         return eAddressClassDebug;
 426       case eSymbolTypeScopeBegin:
 427         return eAddressClassDebug;
 428       case eSymbolTypeScopeEnd:
 429         return eAddressClassDebug;
 430       case eSymbolTypeAdditional:
 431         return eAddressClassUnknown;
 432       case eSymbolTypeCompiler:
 433         return eAddressClassDebug;
 434       case eSymbolTypeInstrumentation:
 435         return eAddressClassDebug;
 436       case eSymbolTypeUndefined:
 437         return eAddressClassUnknown;
 438       case eSymbolTypeObjCClass:
 439         return eAddressClassRuntime;
 440       case eSymbolTypeObjCMetaClass:
 441         return eAddressClassRuntime;
 442       case eSymbolTypeObjCIVar:
 443         return eAddressClassRuntime;
 444       case eSymbolTypeReExported:
 445         return eAddressClassRuntime;
 446       }
 447     }
 448   }
 449   return eAddressClassUnknown;
 450 }
 451
 452 DataBufferSP ObjectFile::ReadMemory(const ProcessSP &process_sp,
 453                                     lldb::addr_t addr, size_t byte_size) {
 454   DataBufferSP data_sp;
 455   if (process_sp) {
 456     std::unique_ptr<DataBufferHeap> data_ap(new DataBufferHeap(byte_size, 0));
 457     Error error;
 458     const size_t bytes_read = process_sp->ReadMemory(
 459         addr, data_ap->GetBytes(), data_ap->GetByteSize(), error);
 460     if (bytes_read == byte_size)
 461       data_sp.reset(data_ap.release());
 462   }
 463   return data_sp;
 464 }
 465
 466 size_t ObjectFile::GetData(lldb::offset_t offset, size_t length,
 467                            DataExtractor &data) const {
 468   // The entire file has already been mmap'ed into m_data, so just copy from
 469   // there
 470   // as the back mmap buffer will be shared with shared pointers.
 471   return data.SetData(m_data, offset, length);
 472 }
 473
 474 size_t ObjectFile::CopyData(lldb::offset_t offset, size_t length,
 475                             void *dst) const {
 476   // The entire file has already been mmap'ed into m_data, so just copy from
 477   // there
 478   // Note that the data remains in target byte order.
 479   return m_data.CopyData(offset, length, dst);
 480 }
 481
 482 size_t ObjectFile::ReadSectionData(const Section *section,
 483                                    lldb::offset_t section_offset, void *dst,
 484                                    size_t dst_len) const {
 485   assert(section);
 486   section_offset *= section->GetTargetByteSize();
 487
 488   // If some other objectfile owns this data, pass this to them.
 489   if (section->GetObjectFile() != this)
 490     return section->GetObjectFile()->ReadSectionData(section, section_offset,
 491                                                      dst, dst_len);
 492
 493   if (IsInMemory()) {
 494     ProcessSP process_sp(m_process_wp.lock());
 495     if (process_sp) {
 496       Error error;
 497       const addr_t base_load_addr =
 498           section->GetLoadBaseAddress(&process_sp->GetTarget());
 499       if (base_load_addr != LLDB_INVALID_ADDRESS)
 500         return process_sp->ReadMemory(base_load_addr + section_offset, dst,
 501                                       dst_len, error);
 502     }
 503   } else {
 504     const lldb::offset_t section_file_size = section->GetFileSize();
 505     if (section_offset < section_file_size) {
 506       const size_t section_bytes_left = section_file_size - section_offset;
 507       size_t section_dst_len = dst_len;
 508       if (section_dst_len > section_bytes_left)
 509         section_dst_len = section_bytes_left;
 510       return CopyData(section->GetFileOffset() + section_offset,
 511                       section_dst_len, dst);
 512     } else {
 513       if (section->GetType() == eSectionTypeZeroFill) {
 514         const uint64_t section_size = section->GetByteSize();
 515         const uint64_t section_bytes_left = section_size - section_offset;
 516         uint64_t section_dst_len = dst_len;
 517         if (section_dst_len > section_bytes_left)
 518           section_dst_len = section_bytes_left;
 519         memset(dst, 0, section_dst_len);
 520         return section_dst_len;
 521       }
 522     }
 523   }
 524   return 0;
 525 }
 526
 527 //----------------------------------------------------------------------
 528 // Get the section data the file on disk
 529 //----------------------------------------------------------------------
 530 size_t ObjectFile::ReadSectionData(const Section *section,
 531                                    DataExtractor &section_data) const {
 532   // If some other objectfile owns this data, pass this to them.
 533   if (section->GetObjectFile() != this)
 534     return section->GetObjectFile()->ReadSectionData(section, section_data);
 535
 536   if (IsInMemory()) {
 537     ProcessSP process_sp(m_process_wp.lock());
 538     if (process_sp) {
 539       const addr_t base_load_addr =
 540           section->GetLoadBaseAddress(&process_sp->GetTarget());
 541       if (base_load_addr != LLDB_INVALID_ADDRESS) {
 542         DataBufferSP data_sp(
 543             ReadMemory(process_sp, base_load_addr, section->GetByteSize()));
 544         if (data_sp) {
 545           section_data.SetData(data_sp, 0, data_sp->GetByteSize());
 546           section_data.SetByteOrder(process_sp->GetByteOrder());
 547           section_data.SetAddressByteSize(process_sp->GetAddressByteSize());
 548           return section_data.GetByteSize();
 549         }
 550       }
 551     }
 552     return GetData(section->GetFileOffset(), section->GetFileSize(),
 553                    section_data);
 554   } else {
 555     // The object file now contains a full mmap'ed copy of the object file data,
 556     // so just use this
 557     return MemoryMapSectionData(section, section_data);
 558   }
 559 }
 560
 561 size_t ObjectFile::MemoryMapSectionData(const Section *section,
 562                                         DataExtractor &section_data) const {
 563   // If some other objectfile owns this data, pass this to them.
 564   if (section->GetObjectFile() != this)
 565     return section->GetObjectFile()->MemoryMapSectionData(section,
 566                                                           section_data);
 567
 568   if (IsInMemory()) {
 569     return ReadSectionData(section, section_data);
 570   } else {
 571     // The object file now contains a full mmap'ed copy of the object file data,
 572     // so just use this
 573     return GetData(section->GetFileOffset(), section->GetFileSize(),
 574                    section_data);
 575   }
 576 }
 577
 578 bool ObjectFile::SplitArchivePathWithObject(const char *path_with_object,
 579                                             FileSpec &archive_file,
 580                                             ConstString &archive_object,
 581                                             bool must_exist) {
 582   RegularExpression g_object_regex(llvm::StringRef("(.*)\\(([^\\)]+)\\)$"));
 583   RegularExpression::Match regex_match(2);
 584   if (g_object_regex.Execute(llvm::StringRef::withNullAsEmpty(path_with_object),
 585                              &regex_match)) {
 586     std::string path;
 587     std::string obj;
 588     if (regex_match.GetMatchAtIndex(path_with_object, 1, path) &&
 589         regex_match.GetMatchAtIndex(path_with_object, 2, obj)) {
 590       archive_file.SetFile(path, false);
 591       archive_object.SetCString(obj.c_str());
 592       if (must_exist && !archive_file.Exists())
 593         return false;
 594       return true;
 595     }
 596   }
 597   return false;
 598 }
 599
 600 void ObjectFile::ClearSymtab() {
 601   ModuleSP module_sp(GetModule());
 602   if (module_sp) {
 603     std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
 604     Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
 605     if (log)
 606       log->Printf("%p ObjectFile::ClearSymtab () symtab = %p",
 607                   static_cast<void *>(this),
 608                   static_cast<void *>(m_symtab_ap.get()));
 609     m_symtab_ap.reset();
 610   }
 611 }
 612
 613 SectionList *ObjectFile::GetSectionList(bool update_module_section_list) {
 614   if (m_sections_ap.get() == nullptr) {
 615     if (update_module_section_list) {
 616       ModuleSP module_sp(GetModule());
 617       if (module_sp) {
 618         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
 619         CreateSections(*module_sp->GetUnifiedSectionList());
 620       }
 621     } else {
 622       SectionList unified_section_list;
 623       CreateSections(unified_section_list);
 624     }
 625   }
 626   return m_sections_ap.get();
 627 }
 628
 629 lldb::SymbolType
 630 ObjectFile::GetSymbolTypeFromName(llvm::StringRef name,
 631                                   lldb::SymbolType symbol_type_hint) {
 632   if (!name.empty()) {
 633     if (name.startswith("_OBJC_")) {
 634       // ObjC
 635       if (name.startswith("_OBJC_CLASS_$_"))
 636         return lldb::eSymbolTypeObjCClass;
 637       if (name.startswith("_OBJC_METACLASS_$_"))
 638         return lldb::eSymbolTypeObjCMetaClass;
 639       if (name.startswith("_OBJC_IVAR_$_"))
 640         return lldb::eSymbolTypeObjCIVar;
 641     } else if (name.startswith(".objc_class_name_")) {
 642       // ObjC v1
 643       return lldb::eSymbolTypeObjCClass;
 644     }
 645   }
 646   return symbol_type_hint;
 647 }
 648
 649 ConstString ObjectFile::GetNextSyntheticSymbolName() {
 650   StreamString ss;
 651   ConstString file_name = GetModule()->GetFileSpec().GetFilename();
 652   ss.Printf("___lldb_unnamed_symbol%u$$%s", ++m_synthetic_symbol_idx,
 653             file_name.GetCString());
 654   return ConstString(ss.GetString());
 655 }
 656
 657 Error ObjectFile::LoadInMemory(Target &target, bool set_pc) {
 658   Error error;
 659   ProcessSP process = target.CalculateProcess();
 660   if (!process)
 661     return Error("No Process");
 662   if (set_pc && !GetEntryPointAddress().IsValid())
 663     return Error("No entry address in object file");
 664
 665   SectionList *section_list = GetSectionList();
 666   if (!section_list)
 667       return Error("No section in object file");
 668   size_t section_count = section_list->GetNumSections(0);
 669   for (size_t i = 0; i < section_count; ++i) {
 670     SectionSP section_sp = section_list->GetSectionAtIndex(i);
 671     addr_t addr = target.GetSectionLoadList().GetSectionLoadAddress(section_sp);
 672     if (addr != LLDB_INVALID_ADDRESS) {
 673       DataExtractor section_data;
 674       // We can skip sections like bss
 675       if (section_sp->GetFileSize() == 0)
 676         continue;
 677       section_sp->GetSectionData(section_data);
 678       lldb::offset_t written = process->WriteMemory(
 679           addr, section_data.GetDataStart(), section_data.GetByteSize(), error);
 680       if (written != section_data.GetByteSize())
 681         return error;
 682     }
 683   }
 684   if (set_pc) {
 685     ThreadList &thread_list = process->GetThreadList();
 686     ThreadSP curr_thread(thread_list.GetSelectedThread());
 687     RegisterContextSP reg_context(curr_thread->GetRegisterContext());
 688     Address file_entry = GetEntryPointAddress();
 689     reg_context->SetPC(file_entry.GetLoadAddress(&target));
 690   }
 691   return error;
 692 }