contrib/llvm/tools/lldb/source/Expression/IRExecutionUnit.cpp

   1 //===-- IRExecutionUnit.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 "llvm/ExecutionEngine/ExecutionEngine.h"
  11 #include "llvm/ExecutionEngine/ObjectCache.h"
  12 #include "llvm/IR/Constants.h"
  13 #include "llvm/IR/LLVMContext.h"
  14 #include "llvm/IR/Module.h"
  15 #include "llvm/Support/SourceMgr.h"
  16 #include "llvm/Support/raw_ostream.h"
  17
  18 #include "lldb/Core/Debugger.h"
  19 #include "lldb/Core/Disassembler.h"
  20 #include "lldb/Core/Module.h"
  21 #include "lldb/Core/Section.h"
  22 #include "lldb/Expression/IRExecutionUnit.h"
  23 #include "lldb/Symbol/CompileUnit.h"
  24 #include "lldb/Symbol/SymbolContext.h"
  25 #include "lldb/Symbol/SymbolFile.h"
  26 #include "lldb/Symbol/SymbolVendor.h"
  27 #include "lldb/Target/ExecutionContext.h"
  28 #include "lldb/Target/ObjCLanguageRuntime.h"
  29 #include "lldb/Target/Target.h"
  30 #include "lldb/Utility/DataBufferHeap.h"
  31 #include "lldb/Utility/DataExtractor.h"
  32 #include "lldb/Utility/LLDBAssert.h"
  33 #include "lldb/Utility/Log.h"
  34
  35 #include "lldb/../../source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h"
  36 #include "lldb/../../source/Plugins/ObjectFile/JIT/ObjectFileJIT.h"
  37
  38 using namespace lldb_private;
  39
  40 IRExecutionUnit::IRExecutionUnit(std::unique_ptr<llvm::LLVMContext> &context_ap,
  41                                  std::unique_ptr<llvm::Module> &module_ap,
  42                                  ConstString &name,
  43                                  const lldb::TargetSP &target_sp,
  44                                  const SymbolContext &sym_ctx,
  45                                  std::vector<std::string> &cpu_features)
  46     : IRMemoryMap(target_sp), m_context_ap(context_ap.release()),
  47       m_module_ap(module_ap.release()), m_module(m_module_ap.get()),
  48       m_cpu_features(cpu_features), m_name(name), m_sym_ctx(sym_ctx),
  49       m_did_jit(false), m_function_load_addr(LLDB_INVALID_ADDRESS),
  50       m_function_end_load_addr(LLDB_INVALID_ADDRESS),
  51       m_reported_allocations(false) {}
  52
  53 lldb::addr_t IRExecutionUnit::WriteNow(const uint8_t *bytes, size_t size,
  54                                        Status &error) {
  55   const bool zero_memory = false;
  56   lldb::addr_t allocation_process_addr =
  57       Malloc(size, 8, lldb::ePermissionsWritable | lldb::ePermissionsReadable,
  58              eAllocationPolicyMirror, zero_memory, error);
  59
  60   if (!error.Success())
  61     return LLDB_INVALID_ADDRESS;
  62
  63   WriteMemory(allocation_process_addr, bytes, size, error);
  64
  65   if (!error.Success()) {
  66     Status err;
  67     Free(allocation_process_addr, err);
  68
  69     return LLDB_INVALID_ADDRESS;
  70   }
  71
  72   if (Log *log =
  73           lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)) {
  74     DataBufferHeap my_buffer(size, 0);
  75     Status err;
  76     ReadMemory(my_buffer.GetBytes(), allocation_process_addr, size, err);
  77
  78     if (err.Success()) {
  79       DataExtractor my_extractor(my_buffer.GetBytes(), my_buffer.GetByteSize(),
  80                                  lldb::eByteOrderBig, 8);
  81       my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(),
  82                             allocation_process_addr, 16,
  83                             DataExtractor::TypeUInt8);
  84     }
  85   }
  86
  87   return allocation_process_addr;
  88 }
  89
  90 void IRExecutionUnit::FreeNow(lldb::addr_t allocation) {
  91   if (allocation == LLDB_INVALID_ADDRESS)
  92     return;
  93
  94   Status err;
  95
  96   Free(allocation, err);
  97 }
  98
  99 Status IRExecutionUnit::DisassembleFunction(Stream &stream,
 100                                             lldb::ProcessSP &process_wp) {
 101   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
 102
 103   ExecutionContext exe_ctx(process_wp);
 104
 105   Status ret;
 106
 107   ret.Clear();
 108
 109   lldb::addr_t func_local_addr = LLDB_INVALID_ADDRESS;
 110   lldb::addr_t func_remote_addr = LLDB_INVALID_ADDRESS;
 111
 112   for (JittedFunction &function : m_jitted_functions) {
 113     if (function.m_name == m_name) {
 114       func_local_addr = function.m_local_addr;
 115       func_remote_addr = function.m_remote_addr;
 116     }
 117   }
 118
 119   if (func_local_addr == LLDB_INVALID_ADDRESS) {
 120     ret.SetErrorToGenericError();
 121     ret.SetErrorStringWithFormat("Couldn't find function %s for disassembly",
 122                                  m_name.AsCString());
 123     return ret;
 124   }
 125
 126   if (log)
 127     log->Printf("Found function, has local address 0x%" PRIx64
 128                 " and remote address 0x%" PRIx64,
 129                 (uint64_t)func_local_addr, (uint64_t)func_remote_addr);
 130
 131   std::pair<lldb::addr_t, lldb::addr_t> func_range;
 132
 133   func_range = GetRemoteRangeForLocal(func_local_addr);
 134
 135   if (func_range.first == 0 && func_range.second == 0) {
 136     ret.SetErrorToGenericError();
 137     ret.SetErrorStringWithFormat("Couldn't find code range for function %s",
 138                                  m_name.AsCString());
 139     return ret;
 140   }
 141
 142   if (log)
 143     log->Printf("Function's code range is [0x%" PRIx64 "+0x%" PRIx64 "]",
 144                 func_range.first, func_range.second);
 145
 146   Target *target = exe_ctx.GetTargetPtr();
 147   if (!target) {
 148     ret.SetErrorToGenericError();
 149     ret.SetErrorString("Couldn't find the target");
 150     return ret;
 151   }
 152
 153   lldb::DataBufferSP buffer_sp(new DataBufferHeap(func_range.second, 0));
 154
 155   Process *process = exe_ctx.GetProcessPtr();
 156   Status err;
 157   process->ReadMemory(func_remote_addr, buffer_sp->GetBytes(),
 158                       buffer_sp->GetByteSize(), err);
 159
 160   if (!err.Success()) {
 161     ret.SetErrorToGenericError();
 162     ret.SetErrorStringWithFormat("Couldn't read from process: %s",
 163                                  err.AsCString("unknown error"));
 164     return ret;
 165   }
 166
 167   ArchSpec arch(target->GetArchitecture());
 168
 169   const char *plugin_name = NULL;
 170   const char *flavor_string = NULL;
 171   lldb::DisassemblerSP disassembler_sp =
 172       Disassembler::FindPlugin(arch, flavor_string, plugin_name);
 173
 174   if (!disassembler_sp) {
 175     ret.SetErrorToGenericError();
 176     ret.SetErrorStringWithFormat(
 177         "Unable to find disassembler plug-in for %s architecture.",
 178         arch.GetArchitectureName());
 179     return ret;
 180   }
 181
 182   if (!process) {
 183     ret.SetErrorToGenericError();
 184     ret.SetErrorString("Couldn't find the process");
 185     return ret;
 186   }
 187
 188   DataExtractor extractor(buffer_sp, process->GetByteOrder(),
 189                           target->GetArchitecture().GetAddressByteSize());
 190
 191   if (log) {
 192     log->Printf("Function data has contents:");
 193     extractor.PutToLog(log, 0, extractor.GetByteSize(), func_remote_addr, 16,
 194                        DataExtractor::TypeUInt8);
 195   }
 196
 197   disassembler_sp->DecodeInstructions(Address(func_remote_addr), extractor, 0,
 198                                       UINT32_MAX, false, false);
 199
 200   InstructionList &instruction_list = disassembler_sp->GetInstructionList();
 201   instruction_list.Dump(&stream, true, true, &exe_ctx);
 202   return ret;
 203 }
 204
 205 static void ReportInlineAsmError(const llvm::SMDiagnostic &diagnostic,
 206                                  void *Context, unsigned LocCookie) {
 207   Status *err = static_cast<Status *>(Context);
 208
 209   if (err && err->Success()) {
 210     err->SetErrorToGenericError();
 211     err->SetErrorStringWithFormat("Inline assembly error: %s",
 212                                   diagnostic.getMessage().str().c_str());
 213   }
 214 }
 215
 216 void IRExecutionUnit::ReportSymbolLookupError(const ConstString &name) {
 217   m_failed_lookups.push_back(name);
 218 }
 219
 220 void IRExecutionUnit::GetRunnableInfo(Status &error, lldb::addr_t &func_addr,
 221                                       lldb::addr_t &func_end) {
 222   lldb::ProcessSP process_sp(GetProcessWP().lock());
 223
 224   static std::recursive_mutex s_runnable_info_mutex;
 225
 226   func_addr = LLDB_INVALID_ADDRESS;
 227   func_end = LLDB_INVALID_ADDRESS;
 228
 229   if (!process_sp) {
 230     error.SetErrorToGenericError();
 231     error.SetErrorString("Couldn't write the JIT compiled code into the "
 232                          "process because the process is invalid");
 233     return;
 234   }
 235
 236   if (m_did_jit) {
 237     func_addr = m_function_load_addr;
 238     func_end = m_function_end_load_addr;
 239
 240     return;
 241   };
 242
 243   std::lock_guard<std::recursive_mutex> guard(s_runnable_info_mutex);
 244
 245   m_did_jit = true;
 246
 247   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
 248
 249   std::string error_string;
 250
 251   if (log) {
 252     std::string s;
 253     llvm::raw_string_ostream oss(s);
 254
 255     m_module->print(oss, NULL);
 256
 257     oss.flush();
 258
 259     log->Printf("Module being sent to JIT: \n%s", s.c_str());
 260   }
 261
 262   llvm::Triple triple(m_module->getTargetTriple());
 263   llvm::Reloc::Model relocModel;
 264
 265   if (triple.isOSBinFormatELF()) {
 266     relocModel = llvm::Reloc::Static;
 267   } else {
 268     relocModel = llvm::Reloc::PIC_;
 269   }
 270
 271   m_module_ap->getContext().setInlineAsmDiagnosticHandler(ReportInlineAsmError,
 272                                                           &error);
 273
 274   llvm::EngineBuilder builder(std::move(m_module_ap));
 275
 276   builder.setEngineKind(llvm::EngineKind::JIT)
 277       .setErrorStr(&error_string)
 278       .setRelocationModel(relocModel)
 279       .setMCJITMemoryManager(
 280           std::unique_ptr<MemoryManager>(new MemoryManager(*this)))
 281       .setOptLevel(llvm::CodeGenOpt::Less);
 282
 283   llvm::StringRef mArch;
 284   llvm::StringRef mCPU;
 285   llvm::SmallVector<std::string, 0> mAttrs;
 286
 287   for (std::string &feature : m_cpu_features)
 288     mAttrs.push_back(feature);
 289
 290   llvm::TargetMachine *target_machine =
 291       builder.selectTarget(triple, mArch, mCPU, mAttrs);
 292
 293   m_execution_engine_ap.reset(builder.create(target_machine));
 294
 295   m_strip_underscore =
 296       (m_execution_engine_ap->getDataLayout().getGlobalPrefix() == '_');
 297
 298   if (!m_execution_engine_ap.get()) {
 299     error.SetErrorToGenericError();
 300     error.SetErrorStringWithFormat("Couldn't JIT the function: %s",
 301                                    error_string.c_str());
 302     return;
 303   }
 304
 305   class ObjectDumper : public llvm::ObjectCache {
 306   public:
 307     void notifyObjectCompiled(const llvm::Module *module,
 308                               llvm::MemoryBufferRef object) override {
 309       int fd = 0;
 310       llvm::SmallVector<char, 256> result_path;
 311       std::string object_name_model =
 312           "jit-object-" + module->getModuleIdentifier() + "-%%%.o";
 313       (void)llvm::sys::fs::createUniqueFile(object_name_model, fd, result_path);
 314       llvm::raw_fd_ostream fds(fd, true);
 315       fds.write(object.getBufferStart(), object.getBufferSize());
 316     }
 317
 318     std::unique_ptr<llvm::MemoryBuffer>
 319     getObject(const llvm::Module *module) override {
 320       // Return nothing - we're just abusing the object-cache mechanism to dump
 321       // objects.
 322       return nullptr;
 323     }
 324   };
 325
 326   if (process_sp->GetTarget().GetEnableSaveObjects()) {
 327     m_object_cache_ap = llvm::make_unique<ObjectDumper>();
 328     m_execution_engine_ap->setObjectCache(m_object_cache_ap.get());
 329   }
 330
 331   // Make sure we see all sections, including ones that don't have
 332   // relocations...
 333   m_execution_engine_ap->setProcessAllSections(true);
 334
 335   m_execution_engine_ap->DisableLazyCompilation();
 336
 337   for (llvm::Function &function : *m_module) {
 338     if (function.isDeclaration() || function.hasPrivateLinkage())
 339       continue;
 340
 341     const bool external =
 342         function.hasExternalLinkage() || function.hasLinkOnceODRLinkage();
 343
 344     void *fun_ptr = m_execution_engine_ap->getPointerToFunction(&function);
 345
 346     if (!error.Success()) {
 347       // We got an error through our callback!
 348       return;
 349     }
 350
 351     if (!fun_ptr) {
 352       error.SetErrorToGenericError();
 353       error.SetErrorStringWithFormat(
 354           "'%s' was in the JITted module but wasn't lowered",
 355           function.getName().str().c_str());
 356       return;
 357     }
 358     m_jitted_functions.push_back(JittedFunction(
 359         function.getName().str().c_str(), external, (lldb::addr_t)fun_ptr));
 360   }
 361
 362   CommitAllocations(process_sp);
 363   ReportAllocations(*m_execution_engine_ap);
 364
 365   // We have to do this after calling ReportAllocations because for the MCJIT,
 366   // getGlobalValueAddress will cause the JIT to perform all relocations.  That
 367   // can only be done once, and has to happen after we do the remapping from
 368   // local -> remote. That means we don't know the local address of the
 369   // Variables, but we don't need that for anything, so that's okay.
 370
 371   std::function<void(llvm::GlobalValue &)> RegisterOneValue = [this](
 372       llvm::GlobalValue &val) {
 373     if (val.hasExternalLinkage() && !val.isDeclaration()) {
 374       uint64_t var_ptr_addr =
 375           m_execution_engine_ap->getGlobalValueAddress(val.getName().str());
 376
 377       lldb::addr_t remote_addr = GetRemoteAddressForLocal(var_ptr_addr);
 378
 379       // This is a really unfortunae API that sometimes returns local addresses
 380       // and sometimes returns remote addresses, based on whether the variable
 381       // was relocated during ReportAllocations or not.
 382
 383       if (remote_addr == LLDB_INVALID_ADDRESS) {
 384         remote_addr = var_ptr_addr;
 385       }
 386
 387       if (var_ptr_addr != 0)
 388         m_jitted_global_variables.push_back(JittedGlobalVariable(
 389             val.getName().str().c_str(), LLDB_INVALID_ADDRESS, remote_addr));
 390     }
 391   };
 392
 393   for (llvm::GlobalVariable &global_var : m_module->getGlobalList()) {
 394     RegisterOneValue(global_var);
 395   }
 396
 397   for (llvm::GlobalAlias &global_alias : m_module->getAliasList()) {
 398     RegisterOneValue(global_alias);
 399   }
 400
 401   WriteData(process_sp);
 402
 403   if (m_failed_lookups.size()) {
 404     StreamString ss;
 405
 406     ss.PutCString("Couldn't lookup symbols:\n");
 407
 408     bool emitNewLine = false;
 409
 410     for (const ConstString &failed_lookup : m_failed_lookups) {
 411       if (emitNewLine)
 412         ss.PutCString("\n");
 413       emitNewLine = true;
 414       ss.PutCString("  ");
 415       ss.PutCString(Mangled(failed_lookup)
 416                         .GetDemangledName(lldb::eLanguageTypeObjC_plus_plus)
 417                         .AsCString());
 418     }
 419
 420     m_failed_lookups.clear();
 421
 422     error.SetErrorString(ss.GetString());
 423
 424     return;
 425   }
 426
 427   m_function_load_addr = LLDB_INVALID_ADDRESS;
 428   m_function_end_load_addr = LLDB_INVALID_ADDRESS;
 429
 430   for (JittedFunction &jitted_function : m_jitted_functions) {
 431     jitted_function.m_remote_addr =
 432         GetRemoteAddressForLocal(jitted_function.m_local_addr);
 433
 434     if (!m_name.IsEmpty() && jitted_function.m_name == m_name) {
 435       AddrRange func_range =
 436           GetRemoteRangeForLocal(jitted_function.m_local_addr);
 437       m_function_end_load_addr = func_range.first + func_range.second;
 438       m_function_load_addr = jitted_function.m_remote_addr;
 439     }
 440   }
 441
 442   if (log) {
 443     log->Printf("Code can be run in the target.");
 444
 445     StreamString disassembly_stream;
 446
 447     Status err = DisassembleFunction(disassembly_stream, process_sp);
 448
 449     if (!err.Success()) {
 450       log->Printf("Couldn't disassemble function : %s",
 451                   err.AsCString("unknown error"));
 452     } else {
 453       log->Printf("Function disassembly:\n%s", disassembly_stream.GetData());
 454     }
 455
 456     log->Printf("Sections: ");
 457     for (AllocationRecord &record : m_records) {
 458       if (record.m_process_address != LLDB_INVALID_ADDRESS) {
 459         record.dump(log);
 460
 461         DataBufferHeap my_buffer(record.m_size, 0);
 462         Status err;
 463         ReadMemory(my_buffer.GetBytes(), record.m_process_address,
 464                    record.m_size, err);
 465
 466         if (err.Success()) {
 467           DataExtractor my_extractor(my_buffer.GetBytes(),
 468                                      my_buffer.GetByteSize(),
 469                                      lldb::eByteOrderBig, 8);
 470           my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(),
 471                                 record.m_process_address, 16,
 472                                 DataExtractor::TypeUInt8);
 473         }
 474       } else {
 475         record.dump(log);
 476
 477         DataExtractor my_extractor((const void *)record.m_host_address,
 478                                    record.m_size, lldb::eByteOrderBig, 8);
 479         my_extractor.PutToLog(log, 0, record.m_size, record.m_host_address, 16,
 480                               DataExtractor::TypeUInt8);
 481       }
 482     }
 483   }
 484
 485   func_addr = m_function_load_addr;
 486   func_end = m_function_end_load_addr;
 487
 488   return;
 489 }
 490
 491 IRExecutionUnit::~IRExecutionUnit() {
 492   m_module_ap.reset();
 493   m_execution_engine_ap.reset();
 494   m_context_ap.reset();
 495 }
 496
 497 IRExecutionUnit::MemoryManager::MemoryManager(IRExecutionUnit &parent)
 498     : m_default_mm_ap(new llvm::SectionMemoryManager()), m_parent(parent) {}
 499
 500 IRExecutionUnit::MemoryManager::~MemoryManager() {}
 501
 502 lldb::SectionType IRExecutionUnit::GetSectionTypeFromSectionName(
 503     const llvm::StringRef &name, IRExecutionUnit::AllocationKind alloc_kind) {
 504   lldb::SectionType sect_type = lldb::eSectionTypeCode;
 505   switch (alloc_kind) {
 506   case AllocationKind::Stub:
 507     sect_type = lldb::eSectionTypeCode;
 508     break;
 509   case AllocationKind::Code:
 510     sect_type = lldb::eSectionTypeCode;
 511     break;
 512   case AllocationKind::Data:
 513     sect_type = lldb::eSectionTypeData;
 514     break;
 515   case AllocationKind::Global:
 516     sect_type = lldb::eSectionTypeData;
 517     break;
 518   case AllocationKind::Bytes:
 519     sect_type = lldb::eSectionTypeOther;
 520     break;
 521   }
 522
 523   if (!name.empty()) {
 524     if (name.equals("__text") || name.equals(".text"))
 525       sect_type = lldb::eSectionTypeCode;
 526     else if (name.equals("__data") || name.equals(".data"))
 527       sect_type = lldb::eSectionTypeCode;
 528     else if (name.startswith("__debug_") || name.startswith(".debug_")) {
 529       const uint32_t name_idx = name[0] == '_' ? 8 : 7;
 530       llvm::StringRef dwarf_name(name.substr(name_idx));
 531       switch (dwarf_name[0]) {
 532       case 'a':
 533         if (dwarf_name.equals("abbrev"))
 534           sect_type = lldb::eSectionTypeDWARFDebugAbbrev;
 535         else if (dwarf_name.equals("aranges"))
 536           sect_type = lldb::eSectionTypeDWARFDebugAranges;
 537         else if (dwarf_name.equals("addr"))
 538           sect_type = lldb::eSectionTypeDWARFDebugAddr;
 539         break;
 540
 541       case 'f':
 542         if (dwarf_name.equals("frame"))
 543           sect_type = lldb::eSectionTypeDWARFDebugFrame;
 544         break;
 545
 546       case 'i':
 547         if (dwarf_name.equals("info"))
 548           sect_type = lldb::eSectionTypeDWARFDebugInfo;
 549         break;
 550
 551       case 'l':
 552         if (dwarf_name.equals("line"))
 553           sect_type = lldb::eSectionTypeDWARFDebugLine;
 554         else if (dwarf_name.equals("loc"))
 555           sect_type = lldb::eSectionTypeDWARFDebugLoc;
 556         else if (dwarf_name.equals("loclists"))
 557           sect_type = lldb::eSectionTypeDWARFDebugLocLists;
 558         break;
 559
 560       case 'm':
 561         if (dwarf_name.equals("macinfo"))
 562           sect_type = lldb::eSectionTypeDWARFDebugMacInfo;
 563         break;
 564
 565       case 'p':
 566         if (dwarf_name.equals("pubnames"))
 567           sect_type = lldb::eSectionTypeDWARFDebugPubNames;
 568         else if (dwarf_name.equals("pubtypes"))
 569           sect_type = lldb::eSectionTypeDWARFDebugPubTypes;
 570         break;
 571
 572       case 's':
 573         if (dwarf_name.equals("str"))
 574           sect_type = lldb::eSectionTypeDWARFDebugStr;
 575         else if (dwarf_name.equals("str_offsets"))
 576           sect_type = lldb::eSectionTypeDWARFDebugStrOffsets;
 577         break;
 578
 579       case 'r':
 580         if (dwarf_name.equals("ranges"))
 581           sect_type = lldb::eSectionTypeDWARFDebugRanges;
 582         break;
 583
 584       default:
 585         break;
 586       }
 587     } else if (name.startswith("__apple_") || name.startswith(".apple_"))
 588       sect_type = lldb::eSectionTypeInvalid;
 589     else if (name.equals("__objc_imageinfo"))
 590       sect_type = lldb::eSectionTypeOther;
 591   }
 592   return sect_type;
 593 }
 594
 595 uint8_t *IRExecutionUnit::MemoryManager::allocateCodeSection(
 596     uintptr_t Size, unsigned Alignment, unsigned SectionID,
 597     llvm::StringRef SectionName) {
 598   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
 599
 600   uint8_t *return_value = m_default_mm_ap->allocateCodeSection(
 601       Size, Alignment, SectionID, SectionName);
 602
 603   m_parent.m_records.push_back(AllocationRecord(
 604       (uintptr_t)return_value,
 605       lldb::ePermissionsReadable | lldb::ePermissionsExecutable,
 606       GetSectionTypeFromSectionName(SectionName, AllocationKind::Code), Size,
 607       Alignment, SectionID, SectionName.str().c_str()));
 608
 609   if (log) {
 610     log->Printf("IRExecutionUnit::allocateCodeSection(Size=0x%" PRIx64
 611                 ", Alignment=%u, SectionID=%u) = %p",
 612                 (uint64_t)Size, Alignment, SectionID, (void *)return_value);
 613   }
 614
 615   if (m_parent.m_reported_allocations) {
 616     Status err;
 617     lldb::ProcessSP process_sp =
 618         m_parent.GetBestExecutionContextScope()->CalculateProcess();
 619
 620     m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back());
 621   }
 622
 623   return return_value;
 624 }
 625
 626 uint8_t *IRExecutionUnit::MemoryManager::allocateDataSection(
 627     uintptr_t Size, unsigned Alignment, unsigned SectionID,
 628     llvm::StringRef SectionName, bool IsReadOnly) {
 629   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
 630
 631   uint8_t *return_value = m_default_mm_ap->allocateDataSection(
 632       Size, Alignment, SectionID, SectionName, IsReadOnly);
 633
 634   uint32_t permissions = lldb::ePermissionsReadable;
 635   if (!IsReadOnly)
 636     permissions |= lldb::ePermissionsWritable;
 637   m_parent.m_records.push_back(AllocationRecord(
 638       (uintptr_t)return_value, permissions,
 639       GetSectionTypeFromSectionName(SectionName, AllocationKind::Data), Size,
 640       Alignment, SectionID, SectionName.str().c_str()));
 641   if (log) {
 642     log->Printf("IRExecutionUnit::allocateDataSection(Size=0x%" PRIx64
 643                 ", Alignment=%u, SectionID=%u) = %p",
 644                 (uint64_t)Size, Alignment, SectionID, (void *)return_value);
 645   }
 646
 647   if (m_parent.m_reported_allocations) {
 648     Status err;
 649     lldb::ProcessSP process_sp =
 650         m_parent.GetBestExecutionContextScope()->CalculateProcess();
 651
 652     m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back());
 653   }
 654
 655   return return_value;
 656 }
 657
 658 static ConstString
 659 FindBestAlternateMangledName(const ConstString &demangled,
 660                              const lldb::LanguageType &lang_type,
 661                              const SymbolContext &sym_ctx) {
 662   CPlusPlusLanguage::MethodName cpp_name(demangled);
 663   std::string scope_qualified_name = cpp_name.GetScopeQualifiedName();
 664
 665   if (!scope_qualified_name.size())
 666     return ConstString();
 667
 668   if (!sym_ctx.module_sp)
 669     return ConstString();
 670
 671   SymbolVendor *sym_vendor = sym_ctx.module_sp->GetSymbolVendor();
 672   if (!sym_vendor)
 673     return ConstString();
 674
 675   lldb_private::SymbolFile *sym_file = sym_vendor->GetSymbolFile();
 676   if (!sym_file)
 677     return ConstString();
 678
 679   std::vector<ConstString> alternates;
 680   sym_file->GetMangledNamesForFunction(scope_qualified_name, alternates);
 681
 682   std::vector<ConstString> param_and_qual_matches;
 683   std::vector<ConstString> param_matches;
 684   for (size_t i = 0; i < alternates.size(); i++) {
 685     ConstString alternate_mangled_name = alternates[i];
 686     Mangled mangled(alternate_mangled_name, true);
 687     ConstString demangled = mangled.GetDemangledName(lang_type);
 688
 689     CPlusPlusLanguage::MethodName alternate_cpp_name(demangled);
 690     if (!cpp_name.IsValid())
 691       continue;
 692
 693     if (alternate_cpp_name.GetArguments() == cpp_name.GetArguments()) {
 694       if (alternate_cpp_name.GetQualifiers() == cpp_name.GetQualifiers())
 695         param_and_qual_matches.push_back(alternate_mangled_name);
 696       else
 697         param_matches.push_back(alternate_mangled_name);
 698     }
 699   }
 700
 701   if (param_and_qual_matches.size())
 702     return param_and_qual_matches[0]; // It is assumed that there will be only
 703                                       // one!
 704   else if (param_matches.size())
 705     return param_matches[0]; // Return one of them as a best match
 706   else
 707     return ConstString();
 708 }
 709
 710 struct IRExecutionUnit::SearchSpec {
 711   ConstString name;
 712   lldb::FunctionNameType mask;
 713
 714   SearchSpec(ConstString n,
 715              lldb::FunctionNameType m = lldb::eFunctionNameTypeFull)
 716       : name(n), mask(m) {}
 717 };
 718
 719 void IRExecutionUnit::CollectCandidateCNames(
 720     std::vector<IRExecutionUnit::SearchSpec> &C_specs,
 721     const ConstString &name) {
 722   if (m_strip_underscore && name.AsCString()[0] == '_')
 723     C_specs.insert(C_specs.begin(), ConstString(&name.AsCString()[1]));
 724   C_specs.push_back(SearchSpec(name));
 725 }
 726
 727 void IRExecutionUnit::CollectCandidateCPlusPlusNames(
 728     std::vector<IRExecutionUnit::SearchSpec> &CPP_specs,
 729     const std::vector<SearchSpec> &C_specs, const SymbolContext &sc) {
 730   for (const SearchSpec &C_spec : C_specs) {
 731     const ConstString &name = C_spec.name;
 732
 733     if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) {
 734       Mangled mangled(name, true);
 735       ConstString demangled =
 736           mangled.GetDemangledName(lldb::eLanguageTypeC_plus_plus);
 737
 738       if (demangled) {
 739         ConstString best_alternate_mangled_name = FindBestAlternateMangledName(
 740             demangled, lldb::eLanguageTypeC_plus_plus, sc);
 741
 742         if (best_alternate_mangled_name) {
 743           CPP_specs.push_back(best_alternate_mangled_name);
 744         }
 745
 746         CPP_specs.push_back(SearchSpec(demangled, lldb::eFunctionNameTypeFull));
 747       }
 748     }
 749
 750     std::set<ConstString> alternates;
 751     CPlusPlusLanguage::FindAlternateFunctionManglings(name, alternates);
 752     CPP_specs.insert(CPP_specs.end(), alternates.begin(), alternates.end());
 753   }
 754 }
 755
 756 void IRExecutionUnit::CollectFallbackNames(
 757     std::vector<SearchSpec> &fallback_specs,
 758     const std::vector<SearchSpec> &C_specs) {
 759   // As a last-ditch fallback, try the base name for C++ names.  It's terrible,
 760   // but the DWARF doesn't always encode "extern C" correctly.
 761
 762   for (const SearchSpec &C_spec : C_specs) {
 763     const ConstString &name = C_spec.name;
 764
 765     if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) {
 766       Mangled mangled_name(name);
 767       ConstString demangled_name =
 768           mangled_name.GetDemangledName(lldb::eLanguageTypeC_plus_plus);
 769       if (!demangled_name.IsEmpty()) {
 770         const char *demangled_cstr = demangled_name.AsCString();
 771         const char *lparen_loc = strchr(demangled_cstr, '(');
 772         if (lparen_loc) {
 773           llvm::StringRef base_name(demangled_cstr,
 774                                     lparen_loc - demangled_cstr);
 775           fallback_specs.push_back(ConstString(base_name));
 776         }
 777       }
 778     }
 779   }
 780 }
 781
 782 lldb::addr_t IRExecutionUnit::FindInSymbols(
 783     const std::vector<IRExecutionUnit::SearchSpec> &specs,
 784     const lldb_private::SymbolContext &sc) {
 785   Target *target = sc.target_sp.get();
 786
 787   if (!target) {
 788     // we shouldn't be doing any symbol lookup at all without a target
 789     return LLDB_INVALID_ADDRESS;
 790   }
 791
 792   for (const SearchSpec &spec : specs) {
 793     SymbolContextList sc_list;
 794
 795     lldb::addr_t best_internal_load_address = LLDB_INVALID_ADDRESS;
 796
 797     std::function<bool(lldb::addr_t &, SymbolContextList &,
 798                        const lldb_private::SymbolContext &)>
 799         get_external_load_address = [&best_internal_load_address, target](
 800             lldb::addr_t &load_address, SymbolContextList &sc_list,
 801             const lldb_private::SymbolContext &sc) -> lldb::addr_t {
 802       load_address = LLDB_INVALID_ADDRESS;
 803
 804       for (size_t si = 0, se = sc_list.GetSize(); si < se; ++si) {
 805         SymbolContext candidate_sc;
 806
 807         sc_list.GetContextAtIndex(si, candidate_sc);
 808
 809         const bool is_external =
 810             (candidate_sc.function) ||
 811             (candidate_sc.symbol && candidate_sc.symbol->IsExternal());
 812         if (candidate_sc.symbol) {
 813           load_address = candidate_sc.symbol->ResolveCallableAddress(*target);
 814
 815           if (load_address == LLDB_INVALID_ADDRESS) {
 816             if (target->GetProcessSP())
 817               load_address =
 818                   candidate_sc.symbol->GetAddress().GetLoadAddress(target);
 819             else
 820               load_address = candidate_sc.symbol->GetAddress().GetFileAddress();
 821           }
 822         }
 823
 824         if (load_address == LLDB_INVALID_ADDRESS && candidate_sc.function) {
 825           if (target->GetProcessSP())
 826             load_address = candidate_sc.function->GetAddressRange()
 827                                .GetBaseAddress()
 828                                .GetLoadAddress(target);
 829           else
 830             load_address = candidate_sc.function->GetAddressRange()
 831                                .GetBaseAddress()
 832                                .GetFileAddress();
 833         }
 834
 835         if (load_address != LLDB_INVALID_ADDRESS) {
 836           if (is_external) {
 837             return true;
 838           } else if (best_internal_load_address == LLDB_INVALID_ADDRESS) {
 839             best_internal_load_address = load_address;
 840             load_address = LLDB_INVALID_ADDRESS;
 841           }
 842         }
 843       }
 844
 845       return false;
 846     };
 847
 848     if (sc.module_sp) {
 849       sc.module_sp->FindFunctions(spec.name, NULL, spec.mask,
 850                                   true,  // include_symbols
 851                                   false, // include_inlines
 852                                   true,  // append
 853                                   sc_list);
 854     }
 855
 856     lldb::addr_t load_address = LLDB_INVALID_ADDRESS;
 857
 858     if (get_external_load_address(load_address, sc_list, sc)) {
 859       return load_address;
 860     } else {
 861       sc_list.Clear();
 862     }
 863
 864     if (sc_list.GetSize() == 0 && sc.target_sp) {
 865       sc.target_sp->GetImages().FindFunctions(spec.name, spec.mask,
 866                                               true,  // include_symbols
 867                                               false, // include_inlines
 868                                               true,  // append
 869                                               sc_list);
 870     }
 871
 872     if (get_external_load_address(load_address, sc_list, sc)) {
 873       return load_address;
 874     } else {
 875       sc_list.Clear();
 876     }
 877
 878     if (sc_list.GetSize() == 0 && sc.target_sp) {
 879       sc.target_sp->GetImages().FindSymbolsWithNameAndType(
 880           spec.name, lldb::eSymbolTypeAny, sc_list);
 881     }
 882
 883     if (get_external_load_address(load_address, sc_list, sc)) {
 884       return load_address;
 885     }
 886     // if there are any searches we try after this, add an sc_list.Clear() in
 887     // an "else" clause here
 888
 889     if (best_internal_load_address != LLDB_INVALID_ADDRESS) {
 890       return best_internal_load_address;
 891     }
 892   }
 893
 894   return LLDB_INVALID_ADDRESS;
 895 }
 896
 897 lldb::addr_t
 898 IRExecutionUnit::FindInRuntimes(const std::vector<SearchSpec> &specs,
 899                                 const lldb_private::SymbolContext &sc) {
 900   lldb::TargetSP target_sp = sc.target_sp;
 901
 902   if (!target_sp) {
 903     return LLDB_INVALID_ADDRESS;
 904   }
 905
 906   lldb::ProcessSP process_sp = sc.target_sp->GetProcessSP();
 907
 908   if (!process_sp) {
 909     return LLDB_INVALID_ADDRESS;
 910   }
 911
 912   ObjCLanguageRuntime *runtime = process_sp->GetObjCLanguageRuntime();
 913
 914   if (runtime) {
 915     for (const SearchSpec &spec : specs) {
 916       lldb::addr_t symbol_load_addr = runtime->LookupRuntimeSymbol(spec.name);
 917
 918       if (symbol_load_addr != LLDB_INVALID_ADDRESS)
 919         return symbol_load_addr;
 920     }
 921   }
 922
 923   return LLDB_INVALID_ADDRESS;
 924 }
 925
 926 lldb::addr_t IRExecutionUnit::FindInUserDefinedSymbols(
 927     const std::vector<SearchSpec> &specs,
 928     const lldb_private::SymbolContext &sc) {
 929   lldb::TargetSP target_sp = sc.target_sp;
 930
 931   for (const SearchSpec &spec : specs) {
 932     lldb::addr_t symbol_load_addr = target_sp->GetPersistentSymbol(spec.name);
 933
 934     if (symbol_load_addr != LLDB_INVALID_ADDRESS)
 935       return symbol_load_addr;
 936   }
 937
 938   return LLDB_INVALID_ADDRESS;
 939 }
 940
 941 lldb::addr_t
 942 IRExecutionUnit::FindSymbol(const lldb_private::ConstString &name) {
 943   std::vector<SearchSpec> candidate_C_names;
 944   std::vector<SearchSpec> candidate_CPlusPlus_names;
 945
 946   CollectCandidateCNames(candidate_C_names, name);
 947
 948   lldb::addr_t ret = FindInSymbols(candidate_C_names, m_sym_ctx);
 949   if (ret == LLDB_INVALID_ADDRESS)
 950     ret = FindInRuntimes(candidate_C_names, m_sym_ctx);
 951
 952   if (ret == LLDB_INVALID_ADDRESS)
 953     ret = FindInUserDefinedSymbols(candidate_C_names, m_sym_ctx);
 954
 955   if (ret == LLDB_INVALID_ADDRESS) {
 956     CollectCandidateCPlusPlusNames(candidate_CPlusPlus_names, candidate_C_names,
 957                                    m_sym_ctx);
 958     ret = FindInSymbols(candidate_CPlusPlus_names, m_sym_ctx);
 959   }
 960
 961   if (ret == LLDB_INVALID_ADDRESS) {
 962     std::vector<SearchSpec> candidate_fallback_names;
 963
 964     CollectFallbackNames(candidate_fallback_names, candidate_C_names);
 965     ret = FindInSymbols(candidate_fallback_names, m_sym_ctx);
 966   }
 967
 968   return ret;
 969 }
 970
 971 void IRExecutionUnit::GetStaticInitializers(
 972     std::vector<lldb::addr_t> &static_initializers) {
 973   if (llvm::GlobalVariable *global_ctors =
 974           m_module->getNamedGlobal("llvm.global_ctors")) {
 975     if (llvm::ConstantArray *ctor_array = llvm::dyn_cast<llvm::ConstantArray>(
 976             global_ctors->getInitializer())) {
 977       for (llvm::Use &ctor_use : ctor_array->operands()) {
 978         if (llvm::ConstantStruct *ctor_struct =
 979                 llvm::dyn_cast<llvm::ConstantStruct>(ctor_use)) {
 980           lldbassert(ctor_struct->getNumOperands() ==
 981                      3); // this is standardized
 982           if (llvm::Function *ctor_function =
 983                   llvm::dyn_cast<llvm::Function>(ctor_struct->getOperand(1))) {
 984             ConstString ctor_function_name_cs(ctor_function->getName().str());
 985
 986             for (JittedFunction &jitted_function : m_jitted_functions) {
 987               if (ctor_function_name_cs == jitted_function.m_name) {
 988                 if (jitted_function.m_remote_addr != LLDB_INVALID_ADDRESS) {
 989                   static_initializers.push_back(jitted_function.m_remote_addr);
 990                 }
 991                 break;
 992               }
 993             }
 994           }
 995         }
 996       }
 997     }
 998   }
 999 }
1000
1001 uint64_t
1002 IRExecutionUnit::MemoryManager::getSymbolAddress(const std::string &Name) {
1003   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
1004
1005   ConstString name_cs(Name.c_str());
1006
1007   lldb::addr_t ret = m_parent.FindSymbol(name_cs);
1008
1009   if (ret == LLDB_INVALID_ADDRESS) {
1010     if (log)
1011       log->Printf(
1012           "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = <not found>",
1013           Name.c_str());
1014
1015     m_parent.ReportSymbolLookupError(name_cs);
1016     return 0;
1017   } else {
1018     if (log)
1019       log->Printf("IRExecutionUnit::getSymbolAddress(Name=\"%s\") = %" PRIx64,
1020                   Name.c_str(), ret);
1021     return ret;
1022   }
1023 }
1024
1025 void *IRExecutionUnit::MemoryManager::getPointerToNamedFunction(
1026     const std::string &Name, bool AbortOnFailure) {
1027   assert(sizeof(void *) == 8);
1028
1029   return (void *)getSymbolAddress(Name);
1030 }
1031
1032 lldb::addr_t
1033 IRExecutionUnit::GetRemoteAddressForLocal(lldb::addr_t local_address) {
1034   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
1035
1036   for (AllocationRecord &record : m_records) {
1037     if (local_address >= record.m_host_address &&
1038         local_address < record.m_host_address + record.m_size) {
1039       if (record.m_process_address == LLDB_INVALID_ADDRESS)
1040         return LLDB_INVALID_ADDRESS;
1041
1042       lldb::addr_t ret =
1043           record.m_process_address + (local_address - record.m_host_address);
1044
1045       if (log) {
1046         log->Printf(
1047             "IRExecutionUnit::GetRemoteAddressForLocal() found 0x%" PRIx64
1048             " in [0x%" PRIx64 "..0x%" PRIx64 "], and returned 0x%" PRIx64
1049             " from [0x%" PRIx64 "..0x%" PRIx64 "].",
1050             local_address, (uint64_t)record.m_host_address,
1051             (uint64_t)record.m_host_address + (uint64_t)record.m_size, ret,
1052             record.m_process_address, record.m_process_address + record.m_size);
1053       }
1054
1055       return ret;
1056     }
1057   }
1058
1059   return LLDB_INVALID_ADDRESS;
1060 }
1061
1062 IRExecutionUnit::AddrRange
1063 IRExecutionUnit::GetRemoteRangeForLocal(lldb::addr_t local_address) {
1064   for (AllocationRecord &record : m_records) {
1065     if (local_address >= record.m_host_address &&
1066         local_address < record.m_host_address + record.m_size) {
1067       if (record.m_process_address == LLDB_INVALID_ADDRESS)
1068         return AddrRange(0, 0);
1069
1070       return AddrRange(record.m_process_address, record.m_size);
1071     }
1072   }
1073
1074   return AddrRange(0, 0);
1075 }
1076
1077 bool IRExecutionUnit::CommitOneAllocation(lldb::ProcessSP &process_sp,
1078                                           Status &error,
1079                                           AllocationRecord &record) {
1080   if (record.m_process_address != LLDB_INVALID_ADDRESS) {
1081     return true;
1082   }
1083
1084   switch (record.m_sect_type) {
1085   case lldb::eSectionTypeInvalid:
1086   case lldb::eSectionTypeDWARFDebugAbbrev:
1087   case lldb::eSectionTypeDWARFDebugAddr:
1088   case lldb::eSectionTypeDWARFDebugAranges:
1089   case lldb::eSectionTypeDWARFDebugCuIndex:
1090   case lldb::eSectionTypeDWARFDebugFrame:
1091   case lldb::eSectionTypeDWARFDebugInfo:
1092   case lldb::eSectionTypeDWARFDebugLine:
1093   case lldb::eSectionTypeDWARFDebugLoc:
1094   case lldb::eSectionTypeDWARFDebugLocLists:
1095   case lldb::eSectionTypeDWARFDebugMacInfo:
1096   case lldb::eSectionTypeDWARFDebugPubNames:
1097   case lldb::eSectionTypeDWARFDebugPubTypes:
1098   case lldb::eSectionTypeDWARFDebugRanges:
1099   case lldb::eSectionTypeDWARFDebugStr:
1100   case lldb::eSectionTypeDWARFDebugStrOffsets:
1101   case lldb::eSectionTypeDWARFAppleNames:
1102   case lldb::eSectionTypeDWARFAppleTypes:
1103   case lldb::eSectionTypeDWARFAppleNamespaces:
1104   case lldb::eSectionTypeDWARFAppleObjC:
1105   case lldb::eSectionTypeDWARFGNUDebugAltLink:
1106     error.Clear();
1107     break;
1108   default:
1109     const bool zero_memory = false;
1110     record.m_process_address =
1111         Malloc(record.m_size, record.m_alignment, record.m_permissions,
1112                eAllocationPolicyProcessOnly, zero_memory, error);
1113     break;
1114   }
1115
1116   return error.Success();
1117 }
1118
1119 bool IRExecutionUnit::CommitAllocations(lldb::ProcessSP &process_sp) {
1120   bool ret = true;
1121
1122   lldb_private::Status err;
1123
1124   for (AllocationRecord &record : m_records) {
1125     ret = CommitOneAllocation(process_sp, err, record);
1126
1127     if (!ret) {
1128       break;
1129     }
1130   }
1131
1132   if (!ret) {
1133     for (AllocationRecord &record : m_records) {
1134       if (record.m_process_address != LLDB_INVALID_ADDRESS) {
1135         Free(record.m_process_address, err);
1136         record.m_process_address = LLDB_INVALID_ADDRESS;
1137       }
1138     }
1139   }
1140
1141   return ret;
1142 }
1143
1144 void IRExecutionUnit::ReportAllocations(llvm::ExecutionEngine &engine) {
1145   m_reported_allocations = true;
1146
1147   for (AllocationRecord &record : m_records) {
1148     if (record.m_process_address == LLDB_INVALID_ADDRESS)
1149       continue;
1150
1151     if (record.m_section_id == eSectionIDInvalid)
1152       continue;
1153
1154     engine.mapSectionAddress((void *)record.m_host_address,
1155                              record.m_process_address);
1156   }
1157
1158   // Trigger re-application of relocations.
1159   engine.finalizeObject();
1160 }
1161
1162 bool IRExecutionUnit::WriteData(lldb::ProcessSP &process_sp) {
1163   bool wrote_something = false;
1164   for (AllocationRecord &record : m_records) {
1165     if (record.m_process_address != LLDB_INVALID_ADDRESS) {
1166       lldb_private::Status err;
1167       WriteMemory(record.m_process_address, (uint8_t *)record.m_host_address,
1168                   record.m_size, err);
1169       if (err.Success())
1170         wrote_something = true;
1171     }
1172   }
1173   return wrote_something;
1174 }
1175
1176 void IRExecutionUnit::AllocationRecord::dump(Log *log) {
1177   if (!log)
1178     return;
1179
1180   log->Printf("[0x%llx+0x%llx]->0x%llx (alignment %d, section ID %d, name %s)",
1181               (unsigned long long)m_host_address, (unsigned long long)m_size,
1182               (unsigned long long)m_process_address, (unsigned)m_alignment,
1183               (unsigned)m_section_id, m_name.c_str());
1184 }
1185
1186 lldb::ByteOrder IRExecutionUnit::GetByteOrder() const {
1187   ExecutionContext exe_ctx(GetBestExecutionContextScope());
1188   return exe_ctx.GetByteOrder();
1189 }
1190
1191 uint32_t IRExecutionUnit::GetAddressByteSize() const {
1192   ExecutionContext exe_ctx(GetBestExecutionContextScope());
1193   return exe_ctx.GetAddressByteSize();
1194 }
1195
1196 void IRExecutionUnit::PopulateSymtab(lldb_private::ObjectFile *obj_file,
1197                                      lldb_private::Symtab &symtab) {
1198   // No symbols yet...
1199 }
1200
1201 void IRExecutionUnit::PopulateSectionList(
1202     lldb_private::ObjectFile *obj_file,
1203     lldb_private::SectionList &section_list) {
1204   for (AllocationRecord &record : m_records) {
1205     if (record.m_size > 0) {
1206       lldb::SectionSP section_sp(new lldb_private::Section(
1207           obj_file->GetModule(), obj_file, record.m_section_id,
1208           ConstString(record.m_name), record.m_sect_type,
1209           record.m_process_address, record.m_size,
1210           record.m_host_address, // file_offset (which is the host address for
1211                                  // the data)
1212           record.m_size,         // file_size
1213           0,
1214           record.m_permissions)); // flags
1215       section_list.AddSection(section_sp);
1216     }
1217   }
1218 }
1219
1220 ArchSpec IRExecutionUnit::GetArchitecture() {
1221   ExecutionContext exe_ctx(GetBestExecutionContextScope());
1222   if(Target *target = exe_ctx.GetTargetPtr())
1223     return target->GetArchitecture();
1224   return ArchSpec();
1225 }
1226
1227 lldb::ModuleSP IRExecutionUnit::GetJITModule() {
1228   ExecutionContext exe_ctx(GetBestExecutionContextScope());
1229   Target *target = exe_ctx.GetTargetPtr();
1230   if (!target)
1231     return nullptr;
1232
1233   auto Delegate = std::static_pointer_cast<lldb_private::ObjectFileJITDelegate>(
1234       shared_from_this());
1235
1236   lldb::ModuleSP jit_module_sp =
1237       lldb_private::Module::CreateModuleFromObjectFile<ObjectFileJIT>(Delegate);
1238   if (!jit_module_sp)
1239     return nullptr;
1240
1241   bool changed = false;
1242   jit_module_sp->SetLoadAddress(*target, 0, true, changed);
1243   return jit_module_sp;
1244 }