1 //===-- IRExecutionUnit.cpp -----------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "llvm/ExecutionEngine/ExecutionEngine.h" 10 #include "llvm/ExecutionEngine/ObjectCache.h" 11 #include "llvm/IR/Constants.h" 12 #include "llvm/IR/LLVMContext.h" 13 #include "llvm/IR/Module.h" 14 #include "llvm/Support/SourceMgr.h" 15 #include "llvm/Support/raw_ostream.h" 16 17 #include "lldb/Core/Debugger.h" 18 #include "lldb/Core/Disassembler.h" 19 #include "lldb/Core/Module.h" 20 #include "lldb/Core/Section.h" 21 #include "lldb/Expression/IRExecutionUnit.h" 22 #include "lldb/Symbol/CompileUnit.h" 23 #include "lldb/Symbol/SymbolContext.h" 24 #include "lldb/Symbol/SymbolFile.h" 25 #include "lldb/Symbol/SymbolVendor.h" 26 #include "lldb/Target/ExecutionContext.h" 27 #include "lldb/Target/LanguageRuntime.h" 28 #include "lldb/Target/Target.h" 29 #include "lldb/Utility/DataBufferHeap.h" 30 #include "lldb/Utility/DataExtractor.h" 31 #include "lldb/Utility/LLDBAssert.h" 32 #include "lldb/Utility/Log.h" 33 34 #include "lldb/../../source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h" 35 #include "lldb/../../source/Plugins/ObjectFile/JIT/ObjectFileJIT.h" 36 37 using namespace lldb_private; 38 39 IRExecutionUnit::IRExecutionUnit(std::unique_ptr<llvm::LLVMContext> &context_up, 40 std::unique_ptr<llvm::Module> &module_up, 41 ConstString &name, 42 const lldb::TargetSP &target_sp, 43 const SymbolContext &sym_ctx, 44 std::vector<std::string> &cpu_features) 45 : IRMemoryMap(target_sp), m_context_up(context_up.release()), 46 m_module_up(module_up.release()), m_module(m_module_up.get()), 47 m_cpu_features(cpu_features), m_name(name), m_sym_ctx(sym_ctx), 48 m_did_jit(false), m_function_load_addr(LLDB_INVALID_ADDRESS), 49 m_function_end_load_addr(LLDB_INVALID_ADDRESS), 50 m_reported_allocations(false) {} 51 52 lldb::addr_t IRExecutionUnit::WriteNow(const uint8_t *bytes, size_t size, 53 Status &error) { 54 const bool zero_memory = false; 55 lldb::addr_t allocation_process_addr = 56 Malloc(size, 8, lldb::ePermissionsWritable | lldb::ePermissionsReadable, 57 eAllocationPolicyMirror, zero_memory, error); 58 59 if (!error.Success()) 60 return LLDB_INVALID_ADDRESS; 61 62 WriteMemory(allocation_process_addr, bytes, size, error); 63 64 if (!error.Success()) { 65 Status err; 66 Free(allocation_process_addr, err); 67 68 return LLDB_INVALID_ADDRESS; 69 } 70 71 if (Log *log = 72 lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)) { 73 DataBufferHeap my_buffer(size, 0); 74 Status err; 75 ReadMemory(my_buffer.GetBytes(), allocation_process_addr, size, err); 76 77 if (err.Success()) { 78 DataExtractor my_extractor(my_buffer.GetBytes(), my_buffer.GetByteSize(), 79 lldb::eByteOrderBig, 8); 80 my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(), 81 allocation_process_addr, 16, 82 DataExtractor::TypeUInt8); 83 } 84 } 85 86 return allocation_process_addr; 87 } 88 89 void IRExecutionUnit::FreeNow(lldb::addr_t allocation) { 90 if (allocation == LLDB_INVALID_ADDRESS) 91 return; 92 93 Status err; 94 95 Free(allocation, err); 96 } 97 98 Status IRExecutionUnit::DisassembleFunction(Stream &stream, 99 lldb::ProcessSP &process_wp) { 100 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 101 102 ExecutionContext exe_ctx(process_wp); 103 104 Status ret; 105 106 ret.Clear(); 107 108 lldb::addr_t func_local_addr = LLDB_INVALID_ADDRESS; 109 lldb::addr_t func_remote_addr = LLDB_INVALID_ADDRESS; 110 111 for (JittedFunction &function : m_jitted_functions) { 112 if (function.m_name == m_name) { 113 func_local_addr = function.m_local_addr; 114 func_remote_addr = function.m_remote_addr; 115 } 116 } 117 118 if (func_local_addr == LLDB_INVALID_ADDRESS) { 119 ret.SetErrorToGenericError(); 120 ret.SetErrorStringWithFormat("Couldn't find function %s for disassembly", 121 m_name.AsCString()); 122 return ret; 123 } 124 125 LLDB_LOGF(log, 126 "Found function, has local address 0x%" PRIx64 127 " and remote address 0x%" PRIx64, 128 (uint64_t)func_local_addr, (uint64_t)func_remote_addr); 129 130 std::pair<lldb::addr_t, lldb::addr_t> func_range; 131 132 func_range = GetRemoteRangeForLocal(func_local_addr); 133 134 if (func_range.first == 0 && func_range.second == 0) { 135 ret.SetErrorToGenericError(); 136 ret.SetErrorStringWithFormat("Couldn't find code range for function %s", 137 m_name.AsCString()); 138 return ret; 139 } 140 141 LLDB_LOGF(log, "Function's code range is [0x%" PRIx64 "+0x%" PRIx64 "]", 142 func_range.first, func_range.second); 143 144 Target *target = exe_ctx.GetTargetPtr(); 145 if (!target) { 146 ret.SetErrorToGenericError(); 147 ret.SetErrorString("Couldn't find the target"); 148 return ret; 149 } 150 151 lldb::DataBufferSP buffer_sp(new DataBufferHeap(func_range.second, 0)); 152 153 Process *process = exe_ctx.GetProcessPtr(); 154 Status err; 155 process->ReadMemory(func_remote_addr, buffer_sp->GetBytes(), 156 buffer_sp->GetByteSize(), err); 157 158 if (!err.Success()) { 159 ret.SetErrorToGenericError(); 160 ret.SetErrorStringWithFormat("Couldn't read from process: %s", 161 err.AsCString("unknown error")); 162 return ret; 163 } 164 165 ArchSpec arch(target->GetArchitecture()); 166 167 const char *plugin_name = nullptr; 168 const char *flavor_string = nullptr; 169 lldb::DisassemblerSP disassembler_sp = 170 Disassembler::FindPlugin(arch, flavor_string, plugin_name); 171 172 if (!disassembler_sp) { 173 ret.SetErrorToGenericError(); 174 ret.SetErrorStringWithFormat( 175 "Unable to find disassembler plug-in for %s architecture.", 176 arch.GetArchitectureName()); 177 return ret; 178 } 179 180 if (!process) { 181 ret.SetErrorToGenericError(); 182 ret.SetErrorString("Couldn't find the process"); 183 return ret; 184 } 185 186 DataExtractor extractor(buffer_sp, process->GetByteOrder(), 187 target->GetArchitecture().GetAddressByteSize()); 188 189 if (log) { 190 LLDB_LOGF(log, "Function data has contents:"); 191 extractor.PutToLog(log, 0, extractor.GetByteSize(), func_remote_addr, 16, 192 DataExtractor::TypeUInt8); 193 } 194 195 disassembler_sp->DecodeInstructions(Address(func_remote_addr), extractor, 0, 196 UINT32_MAX, false, false); 197 198 InstructionList &instruction_list = disassembler_sp->GetInstructionList(); 199 instruction_list.Dump(&stream, true, true, &exe_ctx); 200 return ret; 201 } 202 203 static void ReportInlineAsmError(const llvm::SMDiagnostic &diagnostic, 204 void *Context, unsigned LocCookie) { 205 Status *err = static_cast<Status *>(Context); 206 207 if (err && err->Success()) { 208 err->SetErrorToGenericError(); 209 err->SetErrorStringWithFormat("Inline assembly error: %s", 210 diagnostic.getMessage().str().c_str()); 211 } 212 } 213 214 void IRExecutionUnit::ReportSymbolLookupError(ConstString name) { 215 m_failed_lookups.push_back(name); 216 } 217 218 void IRExecutionUnit::GetRunnableInfo(Status &error, lldb::addr_t &func_addr, 219 lldb::addr_t &func_end) { 220 lldb::ProcessSP process_sp(GetProcessWP().lock()); 221 222 static std::recursive_mutex s_runnable_info_mutex; 223 224 func_addr = LLDB_INVALID_ADDRESS; 225 func_end = LLDB_INVALID_ADDRESS; 226 227 if (!process_sp) { 228 error.SetErrorToGenericError(); 229 error.SetErrorString("Couldn't write the JIT compiled code into the " 230 "process because the process is invalid"); 231 return; 232 } 233 234 if (m_did_jit) { 235 func_addr = m_function_load_addr; 236 func_end = m_function_end_load_addr; 237 238 return; 239 }; 240 241 std::lock_guard<std::recursive_mutex> guard(s_runnable_info_mutex); 242 243 m_did_jit = true; 244 245 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 246 247 std::string error_string; 248 249 if (log) { 250 std::string s; 251 llvm::raw_string_ostream oss(s); 252 253 m_module->print(oss, nullptr); 254 255 oss.flush(); 256 257 LLDB_LOGF(log, "Module being sent to JIT: \n%s", s.c_str()); 258 } 259 260 m_module_up->getContext().setInlineAsmDiagnosticHandler(ReportInlineAsmError, 261 &error); 262 263 llvm::EngineBuilder builder(std::move(m_module_up)); 264 llvm::Triple triple(m_module->getTargetTriple()); 265 266 builder.setEngineKind(llvm::EngineKind::JIT) 267 .setErrorStr(&error_string) 268 .setRelocationModel(triple.isOSBinFormatMachO() ? llvm::Reloc::PIC_ 269 : llvm::Reloc::Static) 270 .setMCJITMemoryManager(std::make_unique<MemoryManager>(*this)) 271 .setOptLevel(llvm::CodeGenOpt::Less); 272 273 llvm::StringRef mArch; 274 llvm::StringRef mCPU; 275 llvm::SmallVector<std::string, 0> mAttrs; 276 277 for (std::string &feature : m_cpu_features) 278 mAttrs.push_back(feature); 279 280 llvm::TargetMachine *target_machine = 281 builder.selectTarget(triple, mArch, mCPU, mAttrs); 282 283 m_execution_engine_up.reset(builder.create(target_machine)); 284 285 if (!m_execution_engine_up) { 286 error.SetErrorToGenericError(); 287 error.SetErrorStringWithFormat("Couldn't JIT the function: %s", 288 error_string.c_str()); 289 return; 290 } 291 292 m_strip_underscore = 293 (m_execution_engine_up->getDataLayout().getGlobalPrefix() == '_'); 294 295 class ObjectDumper : public llvm::ObjectCache { 296 public: 297 void notifyObjectCompiled(const llvm::Module *module, 298 llvm::MemoryBufferRef object) override { 299 int fd = 0; 300 llvm::SmallVector<char, 256> result_path; 301 std::string object_name_model = 302 "jit-object-" + module->getModuleIdentifier() + "-%%%.o"; 303 (void)llvm::sys::fs::createUniqueFile(object_name_model, fd, result_path); 304 llvm::raw_fd_ostream fds(fd, true); 305 fds.write(object.getBufferStart(), object.getBufferSize()); 306 } 307 308 std::unique_ptr<llvm::MemoryBuffer> 309 getObject(const llvm::Module *module) override { 310 // Return nothing - we're just abusing the object-cache mechanism to dump 311 // objects. 312 return nullptr; 313 } 314 }; 315 316 if (process_sp->GetTarget().GetEnableSaveObjects()) { 317 m_object_cache_up = std::make_unique<ObjectDumper>(); 318 m_execution_engine_up->setObjectCache(m_object_cache_up.get()); 319 } 320 321 // Make sure we see all sections, including ones that don't have 322 // relocations... 323 m_execution_engine_up->setProcessAllSections(true); 324 325 m_execution_engine_up->DisableLazyCompilation(); 326 327 for (llvm::Function &function : *m_module) { 328 if (function.isDeclaration() || function.hasPrivateLinkage()) 329 continue; 330 331 const bool external = 332 function.hasExternalLinkage() || function.hasLinkOnceODRLinkage(); 333 334 void *fun_ptr = m_execution_engine_up->getPointerToFunction(&function); 335 336 if (!error.Success()) { 337 // We got an error through our callback! 338 return; 339 } 340 341 if (!fun_ptr) { 342 error.SetErrorToGenericError(); 343 error.SetErrorStringWithFormat( 344 "'%s' was in the JITted module but wasn't lowered", 345 function.getName().str().c_str()); 346 return; 347 } 348 m_jitted_functions.push_back(JittedFunction( 349 function.getName().str().c_str(), external, reinterpret_cast<uintptr_t>(fun_ptr))); 350 } 351 352 CommitAllocations(process_sp); 353 ReportAllocations(*m_execution_engine_up); 354 355 // We have to do this after calling ReportAllocations because for the MCJIT, 356 // getGlobalValueAddress will cause the JIT to perform all relocations. That 357 // can only be done once, and has to happen after we do the remapping from 358 // local -> remote. That means we don't know the local address of the 359 // Variables, but we don't need that for anything, so that's okay. 360 361 std::function<void(llvm::GlobalValue &)> RegisterOneValue = [this]( 362 llvm::GlobalValue &val) { 363 if (val.hasExternalLinkage() && !val.isDeclaration()) { 364 uint64_t var_ptr_addr = 365 m_execution_engine_up->getGlobalValueAddress(val.getName().str()); 366 367 lldb::addr_t remote_addr = GetRemoteAddressForLocal(var_ptr_addr); 368 369 // This is a really unfortunae API that sometimes returns local addresses 370 // and sometimes returns remote addresses, based on whether the variable 371 // was relocated during ReportAllocations or not. 372 373 if (remote_addr == LLDB_INVALID_ADDRESS) { 374 remote_addr = var_ptr_addr; 375 } 376 377 if (var_ptr_addr != 0) 378 m_jitted_global_variables.push_back(JittedGlobalVariable( 379 val.getName().str().c_str(), LLDB_INVALID_ADDRESS, remote_addr)); 380 } 381 }; 382 383 for (llvm::GlobalVariable &global_var : m_module->getGlobalList()) { 384 RegisterOneValue(global_var); 385 } 386 387 for (llvm::GlobalAlias &global_alias : m_module->getAliasList()) { 388 RegisterOneValue(global_alias); 389 } 390 391 WriteData(process_sp); 392 393 if (m_failed_lookups.size()) { 394 StreamString ss; 395 396 ss.PutCString("Couldn't lookup symbols:\n"); 397 398 bool emitNewLine = false; 399 400 for (ConstString failed_lookup : m_failed_lookups) { 401 if (emitNewLine) 402 ss.PutCString("\n"); 403 emitNewLine = true; 404 ss.PutCString(" "); 405 ss.PutCString(Mangled(failed_lookup).GetDemangledName().GetStringRef()); 406 } 407 408 m_failed_lookups.clear(); 409 410 error.SetErrorString(ss.GetString()); 411 412 return; 413 } 414 415 m_function_load_addr = LLDB_INVALID_ADDRESS; 416 m_function_end_load_addr = LLDB_INVALID_ADDRESS; 417 418 for (JittedFunction &jitted_function : m_jitted_functions) { 419 jitted_function.m_remote_addr = 420 GetRemoteAddressForLocal(jitted_function.m_local_addr); 421 422 if (!m_name.IsEmpty() && jitted_function.m_name == m_name) { 423 AddrRange func_range = 424 GetRemoteRangeForLocal(jitted_function.m_local_addr); 425 m_function_end_load_addr = func_range.first + func_range.second; 426 m_function_load_addr = jitted_function.m_remote_addr; 427 } 428 } 429 430 if (log) { 431 LLDB_LOGF(log, "Code can be run in the target."); 432 433 StreamString disassembly_stream; 434 435 Status err = DisassembleFunction(disassembly_stream, process_sp); 436 437 if (!err.Success()) { 438 LLDB_LOGF(log, "Couldn't disassemble function : %s", 439 err.AsCString("unknown error")); 440 } else { 441 LLDB_LOGF(log, "Function disassembly:\n%s", disassembly_stream.GetData()); 442 } 443 444 LLDB_LOGF(log, "Sections: "); 445 for (AllocationRecord &record : m_records) { 446 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 447 record.dump(log); 448 449 DataBufferHeap my_buffer(record.m_size, 0); 450 Status err; 451 ReadMemory(my_buffer.GetBytes(), record.m_process_address, 452 record.m_size, err); 453 454 if (err.Success()) { 455 DataExtractor my_extractor(my_buffer.GetBytes(), 456 my_buffer.GetByteSize(), 457 lldb::eByteOrderBig, 8); 458 my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(), 459 record.m_process_address, 16, 460 DataExtractor::TypeUInt8); 461 } 462 } else { 463 record.dump(log); 464 465 DataExtractor my_extractor((const void *)record.m_host_address, 466 record.m_size, lldb::eByteOrderBig, 8); 467 my_extractor.PutToLog(log, 0, record.m_size, record.m_host_address, 16, 468 DataExtractor::TypeUInt8); 469 } 470 } 471 } 472 473 func_addr = m_function_load_addr; 474 func_end = m_function_end_load_addr; 475 476 return; 477 } 478 479 IRExecutionUnit::~IRExecutionUnit() { 480 m_module_up.reset(); 481 m_execution_engine_up.reset(); 482 m_context_up.reset(); 483 } 484 485 IRExecutionUnit::MemoryManager::MemoryManager(IRExecutionUnit &parent) 486 : m_default_mm_up(new llvm::SectionMemoryManager()), m_parent(parent) {} 487 488 IRExecutionUnit::MemoryManager::~MemoryManager() {} 489 490 lldb::SectionType IRExecutionUnit::GetSectionTypeFromSectionName( 491 const llvm::StringRef &name, IRExecutionUnit::AllocationKind alloc_kind) { 492 lldb::SectionType sect_type = lldb::eSectionTypeCode; 493 switch (alloc_kind) { 494 case AllocationKind::Stub: 495 sect_type = lldb::eSectionTypeCode; 496 break; 497 case AllocationKind::Code: 498 sect_type = lldb::eSectionTypeCode; 499 break; 500 case AllocationKind::Data: 501 sect_type = lldb::eSectionTypeData; 502 break; 503 case AllocationKind::Global: 504 sect_type = lldb::eSectionTypeData; 505 break; 506 case AllocationKind::Bytes: 507 sect_type = lldb::eSectionTypeOther; 508 break; 509 } 510 511 if (!name.empty()) { 512 if (name.equals("__text") || name.equals(".text")) 513 sect_type = lldb::eSectionTypeCode; 514 else if (name.equals("__data") || name.equals(".data")) 515 sect_type = lldb::eSectionTypeCode; 516 else if (name.startswith("__debug_") || name.startswith(".debug_")) { 517 const uint32_t name_idx = name[0] == '_' ? 8 : 7; 518 llvm::StringRef dwarf_name(name.substr(name_idx)); 519 switch (dwarf_name[0]) { 520 case 'a': 521 if (dwarf_name.equals("abbrev")) 522 sect_type = lldb::eSectionTypeDWARFDebugAbbrev; 523 else if (dwarf_name.equals("aranges")) 524 sect_type = lldb::eSectionTypeDWARFDebugAranges; 525 else if (dwarf_name.equals("addr")) 526 sect_type = lldb::eSectionTypeDWARFDebugAddr; 527 break; 528 529 case 'f': 530 if (dwarf_name.equals("frame")) 531 sect_type = lldb::eSectionTypeDWARFDebugFrame; 532 break; 533 534 case 'i': 535 if (dwarf_name.equals("info")) 536 sect_type = lldb::eSectionTypeDWARFDebugInfo; 537 break; 538 539 case 'l': 540 if (dwarf_name.equals("line")) 541 sect_type = lldb::eSectionTypeDWARFDebugLine; 542 else if (dwarf_name.equals("loc")) 543 sect_type = lldb::eSectionTypeDWARFDebugLoc; 544 else if (dwarf_name.equals("loclists")) 545 sect_type = lldb::eSectionTypeDWARFDebugLocLists; 546 break; 547 548 case 'm': 549 if (dwarf_name.equals("macinfo")) 550 sect_type = lldb::eSectionTypeDWARFDebugMacInfo; 551 break; 552 553 case 'p': 554 if (dwarf_name.equals("pubnames")) 555 sect_type = lldb::eSectionTypeDWARFDebugPubNames; 556 else if (dwarf_name.equals("pubtypes")) 557 sect_type = lldb::eSectionTypeDWARFDebugPubTypes; 558 break; 559 560 case 's': 561 if (dwarf_name.equals("str")) 562 sect_type = lldb::eSectionTypeDWARFDebugStr; 563 else if (dwarf_name.equals("str_offsets")) 564 sect_type = lldb::eSectionTypeDWARFDebugStrOffsets; 565 break; 566 567 case 'r': 568 if (dwarf_name.equals("ranges")) 569 sect_type = lldb::eSectionTypeDWARFDebugRanges; 570 break; 571 572 default: 573 break; 574 } 575 } else if (name.startswith("__apple_") || name.startswith(".apple_")) 576 sect_type = lldb::eSectionTypeInvalid; 577 else if (name.equals("__objc_imageinfo")) 578 sect_type = lldb::eSectionTypeOther; 579 } 580 return sect_type; 581 } 582 583 uint8_t *IRExecutionUnit::MemoryManager::allocateCodeSection( 584 uintptr_t Size, unsigned Alignment, unsigned SectionID, 585 llvm::StringRef SectionName) { 586 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 587 588 uint8_t *return_value = m_default_mm_up->allocateCodeSection( 589 Size, Alignment, SectionID, SectionName); 590 591 m_parent.m_records.push_back(AllocationRecord( 592 (uintptr_t)return_value, 593 lldb::ePermissionsReadable | lldb::ePermissionsExecutable, 594 GetSectionTypeFromSectionName(SectionName, AllocationKind::Code), Size, 595 Alignment, SectionID, SectionName.str().c_str())); 596 597 LLDB_LOGF(log, 598 "IRExecutionUnit::allocateCodeSection(Size=0x%" PRIx64 599 ", Alignment=%u, SectionID=%u) = %p", 600 (uint64_t)Size, Alignment, SectionID, (void *)return_value); 601 602 if (m_parent.m_reported_allocations) { 603 Status err; 604 lldb::ProcessSP process_sp = 605 m_parent.GetBestExecutionContextScope()->CalculateProcess(); 606 607 m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back()); 608 } 609 610 return return_value; 611 } 612 613 uint8_t *IRExecutionUnit::MemoryManager::allocateDataSection( 614 uintptr_t Size, unsigned Alignment, unsigned SectionID, 615 llvm::StringRef SectionName, bool IsReadOnly) { 616 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 617 618 uint8_t *return_value = m_default_mm_up->allocateDataSection( 619 Size, Alignment, SectionID, SectionName, IsReadOnly); 620 621 uint32_t permissions = lldb::ePermissionsReadable; 622 if (!IsReadOnly) 623 permissions |= lldb::ePermissionsWritable; 624 m_parent.m_records.push_back(AllocationRecord( 625 (uintptr_t)return_value, permissions, 626 GetSectionTypeFromSectionName(SectionName, AllocationKind::Data), Size, 627 Alignment, SectionID, SectionName.str().c_str())); 628 LLDB_LOGF(log, 629 "IRExecutionUnit::allocateDataSection(Size=0x%" PRIx64 630 ", Alignment=%u, SectionID=%u) = %p", 631 (uint64_t)Size, Alignment, SectionID, (void *)return_value); 632 633 if (m_parent.m_reported_allocations) { 634 Status err; 635 lldb::ProcessSP process_sp = 636 m_parent.GetBestExecutionContextScope()->CalculateProcess(); 637 638 m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back()); 639 } 640 641 return return_value; 642 } 643 644 static ConstString FindBestAlternateMangledName(ConstString demangled, 645 const SymbolContext &sym_ctx) { 646 CPlusPlusLanguage::MethodName cpp_name(demangled); 647 std::string scope_qualified_name = cpp_name.GetScopeQualifiedName(); 648 649 if (!scope_qualified_name.size()) 650 return ConstString(); 651 652 if (!sym_ctx.module_sp) 653 return ConstString(); 654 655 lldb_private::SymbolFile *sym_file = sym_ctx.module_sp->GetSymbolFile(); 656 if (!sym_file) 657 return ConstString(); 658 659 std::vector<ConstString> alternates; 660 sym_file->GetMangledNamesForFunction(scope_qualified_name, alternates); 661 662 std::vector<ConstString> param_and_qual_matches; 663 std::vector<ConstString> param_matches; 664 for (size_t i = 0; i < alternates.size(); i++) { 665 ConstString alternate_mangled_name = alternates[i]; 666 Mangled mangled(alternate_mangled_name); 667 ConstString demangled = mangled.GetDemangledName(); 668 669 CPlusPlusLanguage::MethodName alternate_cpp_name(demangled); 670 if (!cpp_name.IsValid()) 671 continue; 672 673 if (alternate_cpp_name.GetArguments() == cpp_name.GetArguments()) { 674 if (alternate_cpp_name.GetQualifiers() == cpp_name.GetQualifiers()) 675 param_and_qual_matches.push_back(alternate_mangled_name); 676 else 677 param_matches.push_back(alternate_mangled_name); 678 } 679 } 680 681 if (param_and_qual_matches.size()) 682 return param_and_qual_matches[0]; // It is assumed that there will be only 683 // one! 684 else if (param_matches.size()) 685 return param_matches[0]; // Return one of them as a best match 686 else 687 return ConstString(); 688 } 689 690 struct IRExecutionUnit::SearchSpec { 691 ConstString name; 692 lldb::FunctionNameType mask; 693 694 SearchSpec(ConstString n, 695 lldb::FunctionNameType m = lldb::eFunctionNameTypeFull) 696 : name(n), mask(m) {} 697 }; 698 699 void IRExecutionUnit::CollectCandidateCNames( 700 std::vector<IRExecutionUnit::SearchSpec> &C_specs, 701 ConstString name) { 702 if (m_strip_underscore && name.AsCString()[0] == '_') 703 C_specs.insert(C_specs.begin(), ConstString(&name.AsCString()[1])); 704 C_specs.push_back(SearchSpec(name)); 705 } 706 707 void IRExecutionUnit::CollectCandidateCPlusPlusNames( 708 std::vector<IRExecutionUnit::SearchSpec> &CPP_specs, 709 const std::vector<SearchSpec> &C_specs, const SymbolContext &sc) { 710 for (const SearchSpec &C_spec : C_specs) { 711 ConstString name = C_spec.name; 712 713 if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) { 714 Mangled mangled(name); 715 ConstString demangled = mangled.GetDemangledName(); 716 717 if (demangled) { 718 ConstString best_alternate_mangled_name = 719 FindBestAlternateMangledName(demangled, sc); 720 721 if (best_alternate_mangled_name) { 722 CPP_specs.push_back(best_alternate_mangled_name); 723 } 724 } 725 } 726 727 std::set<ConstString> alternates; 728 CPlusPlusLanguage::FindAlternateFunctionManglings(name, alternates); 729 CPP_specs.insert(CPP_specs.end(), alternates.begin(), alternates.end()); 730 } 731 } 732 733 void IRExecutionUnit::CollectFallbackNames( 734 std::vector<SearchSpec> &fallback_specs, 735 const std::vector<SearchSpec> &C_specs) { 736 // As a last-ditch fallback, try the base name for C++ names. It's terrible, 737 // but the DWARF doesn't always encode "extern C" correctly. 738 739 for (const SearchSpec &C_spec : C_specs) { 740 ConstString name = C_spec.name; 741 742 if (!CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) 743 continue; 744 745 Mangled mangled_name(name); 746 ConstString demangled_name = mangled_name.GetDemangledName(); 747 if (demangled_name.IsEmpty()) 748 continue; 749 750 const char *demangled_cstr = demangled_name.AsCString(); 751 const char *lparen_loc = strchr(demangled_cstr, '('); 752 if (!lparen_loc) 753 continue; 754 755 llvm::StringRef base_name(demangled_cstr, 756 lparen_loc - demangled_cstr); 757 fallback_specs.push_back(ConstString(base_name)); 758 } 759 } 760 761 lldb::addr_t IRExecutionUnit::FindInSymbols( 762 const std::vector<IRExecutionUnit::SearchSpec> &specs, 763 const lldb_private::SymbolContext &sc, 764 bool &symbol_was_missing_weak) { 765 symbol_was_missing_weak = false; 766 Target *target = sc.target_sp.get(); 767 768 if (!target) { 769 // we shouldn't be doing any symbol lookup at all without a target 770 return LLDB_INVALID_ADDRESS; 771 } 772 773 for (const SearchSpec &spec : specs) { 774 SymbolContextList sc_list; 775 776 lldb::addr_t best_internal_load_address = LLDB_INVALID_ADDRESS; 777 778 std::function<bool(lldb::addr_t &, SymbolContextList &, 779 const lldb_private::SymbolContext &)> 780 get_external_load_address = [&best_internal_load_address, target, 781 &symbol_was_missing_weak]( 782 lldb::addr_t &load_address, SymbolContextList &sc_list, 783 const lldb_private::SymbolContext &sc) -> lldb::addr_t { 784 load_address = LLDB_INVALID_ADDRESS; 785 786 if (sc_list.GetSize() == 0) 787 return false; 788 789 // missing_weak_symbol will be true only if we found only weak undefined 790 // references to this symbol. 791 symbol_was_missing_weak = true; 792 for (auto candidate_sc : sc_list.SymbolContexts()) { 793 // Only symbols can be weak undefined: 794 if (!candidate_sc.symbol) 795 symbol_was_missing_weak = false; 796 else if (candidate_sc.symbol->GetType() != lldb::eSymbolTypeUndefined 797 || !candidate_sc.symbol->IsWeak()) 798 symbol_was_missing_weak = false; 799 800 const bool is_external = 801 (candidate_sc.function) || 802 (candidate_sc.symbol && candidate_sc.symbol->IsExternal()); 803 if (candidate_sc.symbol) { 804 load_address = candidate_sc.symbol->ResolveCallableAddress(*target); 805 806 if (load_address == LLDB_INVALID_ADDRESS) { 807 if (target->GetProcessSP()) 808 load_address = 809 candidate_sc.symbol->GetAddress().GetLoadAddress(target); 810 else 811 load_address = candidate_sc.symbol->GetAddress().GetFileAddress(); 812 } 813 } 814 815 if (load_address == LLDB_INVALID_ADDRESS && candidate_sc.function) { 816 if (target->GetProcessSP()) 817 load_address = candidate_sc.function->GetAddressRange() 818 .GetBaseAddress() 819 .GetLoadAddress(target); 820 else 821 load_address = candidate_sc.function->GetAddressRange() 822 .GetBaseAddress() 823 .GetFileAddress(); 824 } 825 826 if (load_address != LLDB_INVALID_ADDRESS) { 827 if (is_external) { 828 return true; 829 } else if (best_internal_load_address == LLDB_INVALID_ADDRESS) { 830 best_internal_load_address = load_address; 831 load_address = LLDB_INVALID_ADDRESS; 832 } 833 } 834 } 835 836 // You test the address of a weak symbol against NULL to see if it is 837 // present. So we should return 0 for a missing weak symbol. 838 if (symbol_was_missing_weak) { 839 load_address = 0; 840 return true; 841 } 842 843 return false; 844 }; 845 846 if (sc.module_sp) { 847 sc.module_sp->FindFunctions(spec.name, CompilerDeclContext(), spec.mask, 848 true, // include_symbols 849 false, // include_inlines 850 sc_list); 851 } 852 853 lldb::addr_t load_address = LLDB_INVALID_ADDRESS; 854 855 if (get_external_load_address(load_address, sc_list, sc)) { 856 return load_address; 857 } else { 858 sc_list.Clear(); 859 } 860 861 if (sc_list.GetSize() == 0 && sc.target_sp) { 862 sc.target_sp->GetImages().FindFunctions(spec.name, spec.mask, 863 true, // include_symbols 864 false, // include_inlines 865 sc_list); 866 } 867 868 if (get_external_load_address(load_address, sc_list, sc)) { 869 return load_address; 870 } else { 871 sc_list.Clear(); 872 } 873 874 if (sc_list.GetSize() == 0 && sc.target_sp) { 875 sc.target_sp->GetImages().FindSymbolsWithNameAndType( 876 spec.name, lldb::eSymbolTypeAny, sc_list); 877 } 878 879 if (get_external_load_address(load_address, sc_list, sc)) { 880 return load_address; 881 } 882 // if there are any searches we try after this, add an sc_list.Clear() in 883 // an "else" clause here 884 885 if (best_internal_load_address != LLDB_INVALID_ADDRESS) { 886 return best_internal_load_address; 887 } 888 } 889 890 return LLDB_INVALID_ADDRESS; 891 } 892 893 lldb::addr_t 894 IRExecutionUnit::FindInRuntimes(const std::vector<SearchSpec> &specs, 895 const lldb_private::SymbolContext &sc) { 896 lldb::TargetSP target_sp = sc.target_sp; 897 898 if (!target_sp) { 899 return LLDB_INVALID_ADDRESS; 900 } 901 902 lldb::ProcessSP process_sp = sc.target_sp->GetProcessSP(); 903 904 if (!process_sp) { 905 return LLDB_INVALID_ADDRESS; 906 } 907 908 for (const SearchSpec &spec : specs) { 909 for (LanguageRuntime *runtime : process_sp->GetLanguageRuntimes()) { 910 lldb::addr_t symbol_load_addr = runtime->LookupRuntimeSymbol(spec.name); 911 912 if (symbol_load_addr != LLDB_INVALID_ADDRESS) 913 return symbol_load_addr; 914 } 915 } 916 917 return LLDB_INVALID_ADDRESS; 918 } 919 920 lldb::addr_t IRExecutionUnit::FindInUserDefinedSymbols( 921 const std::vector<SearchSpec> &specs, 922 const lldb_private::SymbolContext &sc) { 923 lldb::TargetSP target_sp = sc.target_sp; 924 925 for (const SearchSpec &spec : specs) { 926 lldb::addr_t symbol_load_addr = target_sp->GetPersistentSymbol(spec.name); 927 928 if (symbol_load_addr != LLDB_INVALID_ADDRESS) 929 return symbol_load_addr; 930 } 931 932 return LLDB_INVALID_ADDRESS; 933 } 934 935 lldb::addr_t 936 IRExecutionUnit::FindSymbol(lldb_private::ConstString name, bool &missing_weak) { 937 std::vector<SearchSpec> candidate_C_names; 938 std::vector<SearchSpec> candidate_CPlusPlus_names; 939 940 CollectCandidateCNames(candidate_C_names, name); 941 942 lldb::addr_t ret = FindInSymbols(candidate_C_names, m_sym_ctx, missing_weak); 943 if (ret != LLDB_INVALID_ADDRESS) 944 return ret; 945 946 // If we find the symbol in runtimes or user defined symbols it can't be 947 // a missing weak symbol. 948 missing_weak = false; 949 ret = FindInRuntimes(candidate_C_names, m_sym_ctx); 950 if (ret != LLDB_INVALID_ADDRESS) 951 return ret; 952 953 ret = FindInUserDefinedSymbols(candidate_C_names, m_sym_ctx); 954 if (ret != LLDB_INVALID_ADDRESS) 955 return ret; 956 957 CollectCandidateCPlusPlusNames(candidate_CPlusPlus_names, candidate_C_names, 958 m_sym_ctx); 959 ret = FindInSymbols(candidate_CPlusPlus_names, m_sym_ctx, missing_weak); 960 if (ret != LLDB_INVALID_ADDRESS) 961 return ret; 962 963 std::vector<SearchSpec> candidate_fallback_names; 964 965 CollectFallbackNames(candidate_fallback_names, candidate_C_names); 966 ret = FindInSymbols(candidate_fallback_names, m_sym_ctx, missing_weak); 967 968 return ret; 969 } 970 971 void IRExecutionUnit::GetStaticInitializers( 972 std::vector<lldb::addr_t> &static_initializers) { 973 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 974 975 llvm::GlobalVariable *global_ctors = 976 m_module->getNamedGlobal("llvm.global_ctors"); 977 if (!global_ctors) { 978 LLDB_LOG(log, "Couldn't find llvm.global_ctors."); 979 return; 980 } 981 auto *ctor_array = 982 llvm::dyn_cast<llvm::ConstantArray>(global_ctors->getInitializer()); 983 if (!ctor_array) { 984 LLDB_LOG(log, "llvm.global_ctors not a ConstantArray."); 985 return; 986 } 987 988 for (llvm::Use &ctor_use : ctor_array->operands()) { 989 auto *ctor_struct = llvm::dyn_cast<llvm::ConstantStruct>(ctor_use); 990 if (!ctor_struct) 991 continue; 992 // this is standardized 993 lldbassert(ctor_struct->getNumOperands() == 3); 994 auto *ctor_function = 995 llvm::dyn_cast<llvm::Function>(ctor_struct->getOperand(1)); 996 if (!ctor_function) { 997 LLDB_LOG(log, "global_ctor doesn't contain an llvm::Function"); 998 continue; 999 } 1000 1001 ConstString ctor_function_name(ctor_function->getName().str()); 1002 LLDB_LOG(log, "Looking for callable jitted function with name {0}.", 1003 ctor_function_name); 1004 1005 for (JittedFunction &jitted_function : m_jitted_functions) { 1006 if (ctor_function_name != jitted_function.m_name) 1007 continue; 1008 if (jitted_function.m_remote_addr == LLDB_INVALID_ADDRESS) { 1009 LLDB_LOG(log, "Found jitted function with invalid address."); 1010 continue; 1011 } 1012 static_initializers.push_back(jitted_function.m_remote_addr); 1013 LLDB_LOG(log, "Calling function at address {0:x}.", 1014 jitted_function.m_remote_addr); 1015 break; 1016 } 1017 } 1018 } 1019 1020 llvm::JITSymbol 1021 IRExecutionUnit::MemoryManager::findSymbol(const std::string &Name) { 1022 bool missing_weak = false; 1023 uint64_t addr = GetSymbolAddressAndPresence(Name, missing_weak); 1024 // This is a weak symbol: 1025 if (missing_weak) 1026 return llvm::JITSymbol(addr, 1027 llvm::JITSymbolFlags::Exported | llvm::JITSymbolFlags::Weak); 1028 else 1029 return llvm::JITSymbol(addr, llvm::JITSymbolFlags::Exported); 1030 } 1031 1032 uint64_t 1033 IRExecutionUnit::MemoryManager::getSymbolAddress(const std::string &Name) { 1034 bool missing_weak = false; 1035 return GetSymbolAddressAndPresence(Name, missing_weak); 1036 } 1037 1038 uint64_t 1039 IRExecutionUnit::MemoryManager::GetSymbolAddressAndPresence( 1040 const std::string &Name, bool &missing_weak) { 1041 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1042 1043 ConstString name_cs(Name.c_str()); 1044 1045 lldb::addr_t ret = m_parent.FindSymbol(name_cs, missing_weak); 1046 1047 if (ret == LLDB_INVALID_ADDRESS) { 1048 LLDB_LOGF(log, 1049 "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = <not found>", 1050 Name.c_str()); 1051 1052 m_parent.ReportSymbolLookupError(name_cs); 1053 return 0; 1054 } else { 1055 LLDB_LOGF(log, "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = %" PRIx64, 1056 Name.c_str(), ret); 1057 return ret; 1058 } 1059 } 1060 1061 void *IRExecutionUnit::MemoryManager::getPointerToNamedFunction( 1062 const std::string &Name, bool AbortOnFailure) { 1063 return (void *)getSymbolAddress(Name); 1064 } 1065 1066 lldb::addr_t 1067 IRExecutionUnit::GetRemoteAddressForLocal(lldb::addr_t local_address) { 1068 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1069 1070 for (AllocationRecord &record : m_records) { 1071 if (local_address >= record.m_host_address && 1072 local_address < record.m_host_address + record.m_size) { 1073 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1074 return LLDB_INVALID_ADDRESS; 1075 1076 lldb::addr_t ret = 1077 record.m_process_address + (local_address - record.m_host_address); 1078 1079 LLDB_LOGF(log, 1080 "IRExecutionUnit::GetRemoteAddressForLocal() found 0x%" PRIx64 1081 " in [0x%" PRIx64 "..0x%" PRIx64 "], and returned 0x%" PRIx64 1082 " from [0x%" PRIx64 "..0x%" PRIx64 "].", 1083 local_address, (uint64_t)record.m_host_address, 1084 (uint64_t)record.m_host_address + (uint64_t)record.m_size, ret, 1085 record.m_process_address, 1086 record.m_process_address + record.m_size); 1087 1088 return ret; 1089 } 1090 } 1091 1092 return LLDB_INVALID_ADDRESS; 1093 } 1094 1095 IRExecutionUnit::AddrRange 1096 IRExecutionUnit::GetRemoteRangeForLocal(lldb::addr_t local_address) { 1097 for (AllocationRecord &record : m_records) { 1098 if (local_address >= record.m_host_address && 1099 local_address < record.m_host_address + record.m_size) { 1100 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1101 return AddrRange(0, 0); 1102 1103 return AddrRange(record.m_process_address, record.m_size); 1104 } 1105 } 1106 1107 return AddrRange(0, 0); 1108 } 1109 1110 bool IRExecutionUnit::CommitOneAllocation(lldb::ProcessSP &process_sp, 1111 Status &error, 1112 AllocationRecord &record) { 1113 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1114 return true; 1115 } 1116 1117 switch (record.m_sect_type) { 1118 case lldb::eSectionTypeInvalid: 1119 case lldb::eSectionTypeDWARFDebugAbbrev: 1120 case lldb::eSectionTypeDWARFDebugAddr: 1121 case lldb::eSectionTypeDWARFDebugAranges: 1122 case lldb::eSectionTypeDWARFDebugCuIndex: 1123 case lldb::eSectionTypeDWARFDebugFrame: 1124 case lldb::eSectionTypeDWARFDebugInfo: 1125 case lldb::eSectionTypeDWARFDebugLine: 1126 case lldb::eSectionTypeDWARFDebugLoc: 1127 case lldb::eSectionTypeDWARFDebugLocLists: 1128 case lldb::eSectionTypeDWARFDebugMacInfo: 1129 case lldb::eSectionTypeDWARFDebugPubNames: 1130 case lldb::eSectionTypeDWARFDebugPubTypes: 1131 case lldb::eSectionTypeDWARFDebugRanges: 1132 case lldb::eSectionTypeDWARFDebugStr: 1133 case lldb::eSectionTypeDWARFDebugStrOffsets: 1134 case lldb::eSectionTypeDWARFAppleNames: 1135 case lldb::eSectionTypeDWARFAppleTypes: 1136 case lldb::eSectionTypeDWARFAppleNamespaces: 1137 case lldb::eSectionTypeDWARFAppleObjC: 1138 case lldb::eSectionTypeDWARFGNUDebugAltLink: 1139 error.Clear(); 1140 break; 1141 default: 1142 const bool zero_memory = false; 1143 record.m_process_address = 1144 Malloc(record.m_size, record.m_alignment, record.m_permissions, 1145 eAllocationPolicyProcessOnly, zero_memory, error); 1146 break; 1147 } 1148 1149 return error.Success(); 1150 } 1151 1152 bool IRExecutionUnit::CommitAllocations(lldb::ProcessSP &process_sp) { 1153 bool ret = true; 1154 1155 lldb_private::Status err; 1156 1157 for (AllocationRecord &record : m_records) { 1158 ret = CommitOneAllocation(process_sp, err, record); 1159 1160 if (!ret) { 1161 break; 1162 } 1163 } 1164 1165 if (!ret) { 1166 for (AllocationRecord &record : m_records) { 1167 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1168 Free(record.m_process_address, err); 1169 record.m_process_address = LLDB_INVALID_ADDRESS; 1170 } 1171 } 1172 } 1173 1174 return ret; 1175 } 1176 1177 void IRExecutionUnit::ReportAllocations(llvm::ExecutionEngine &engine) { 1178 m_reported_allocations = true; 1179 1180 for (AllocationRecord &record : m_records) { 1181 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1182 continue; 1183 1184 if (record.m_section_id == eSectionIDInvalid) 1185 continue; 1186 1187 engine.mapSectionAddress((void *)record.m_host_address, 1188 record.m_process_address); 1189 } 1190 1191 // Trigger re-application of relocations. 1192 engine.finalizeObject(); 1193 } 1194 1195 bool IRExecutionUnit::WriteData(lldb::ProcessSP &process_sp) { 1196 bool wrote_something = false; 1197 for (AllocationRecord &record : m_records) { 1198 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1199 lldb_private::Status err; 1200 WriteMemory(record.m_process_address, (uint8_t *)record.m_host_address, 1201 record.m_size, err); 1202 if (err.Success()) 1203 wrote_something = true; 1204 } 1205 } 1206 return wrote_something; 1207 } 1208 1209 void IRExecutionUnit::AllocationRecord::dump(Log *log) { 1210 if (!log) 1211 return; 1212 1213 LLDB_LOGF(log, 1214 "[0x%llx+0x%llx]->0x%llx (alignment %d, section ID %d, name %s)", 1215 (unsigned long long)m_host_address, (unsigned long long)m_size, 1216 (unsigned long long)m_process_address, (unsigned)m_alignment, 1217 (unsigned)m_section_id, m_name.c_str()); 1218 } 1219 1220 lldb::ByteOrder IRExecutionUnit::GetByteOrder() const { 1221 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1222 return exe_ctx.GetByteOrder(); 1223 } 1224 1225 uint32_t IRExecutionUnit::GetAddressByteSize() const { 1226 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1227 return exe_ctx.GetAddressByteSize(); 1228 } 1229 1230 void IRExecutionUnit::PopulateSymtab(lldb_private::ObjectFile *obj_file, 1231 lldb_private::Symtab &symtab) { 1232 // No symbols yet... 1233 } 1234 1235 void IRExecutionUnit::PopulateSectionList( 1236 lldb_private::ObjectFile *obj_file, 1237 lldb_private::SectionList §ion_list) { 1238 for (AllocationRecord &record : m_records) { 1239 if (record.m_size > 0) { 1240 lldb::SectionSP section_sp(new lldb_private::Section( 1241 obj_file->GetModule(), obj_file, record.m_section_id, 1242 ConstString(record.m_name), record.m_sect_type, 1243 record.m_process_address, record.m_size, 1244 record.m_host_address, // file_offset (which is the host address for 1245 // the data) 1246 record.m_size, // file_size 1247 0, 1248 record.m_permissions)); // flags 1249 section_list.AddSection(section_sp); 1250 } 1251 } 1252 } 1253 1254 ArchSpec IRExecutionUnit::GetArchitecture() { 1255 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1256 if(Target *target = exe_ctx.GetTargetPtr()) 1257 return target->GetArchitecture(); 1258 return ArchSpec(); 1259 } 1260 1261 lldb::ModuleSP IRExecutionUnit::GetJITModule() { 1262 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1263 Target *target = exe_ctx.GetTargetPtr(); 1264 if (!target) 1265 return nullptr; 1266 1267 auto Delegate = std::static_pointer_cast<lldb_private::ObjectFileJITDelegate>( 1268 shared_from_this()); 1269 1270 lldb::ModuleSP jit_module_sp = 1271 lldb_private::Module::CreateModuleFromObjectFile<ObjectFileJIT>(Delegate); 1272 if (!jit_module_sp) 1273 return nullptr; 1274 1275 bool changed = false; 1276 jit_module_sp->SetLoadAddress(*target, 0, true, changed); 1277 return jit_module_sp; 1278 } 1279