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 = !function.hasLocalLinkage(); 332 333 void *fun_ptr = m_execution_engine_up->getPointerToFunction(&function); 334 335 if (!error.Success()) { 336 // We got an error through our callback! 337 return; 338 } 339 340 if (!fun_ptr) { 341 error.SetErrorToGenericError(); 342 error.SetErrorStringWithFormat( 343 "'%s' was in the JITted module but wasn't lowered", 344 function.getName().str().c_str()); 345 return; 346 } 347 m_jitted_functions.push_back(JittedFunction( 348 function.getName().str().c_str(), external, reinterpret_cast<uintptr_t>(fun_ptr))); 349 } 350 351 CommitAllocations(process_sp); 352 ReportAllocations(*m_execution_engine_up); 353 354 // We have to do this after calling ReportAllocations because for the MCJIT, 355 // getGlobalValueAddress will cause the JIT to perform all relocations. That 356 // can only be done once, and has to happen after we do the remapping from 357 // local -> remote. That means we don't know the local address of the 358 // Variables, but we don't need that for anything, so that's okay. 359 360 std::function<void(llvm::GlobalValue &)> RegisterOneValue = [this]( 361 llvm::GlobalValue &val) { 362 if (val.hasExternalLinkage() && !val.isDeclaration()) { 363 uint64_t var_ptr_addr = 364 m_execution_engine_up->getGlobalValueAddress(val.getName().str()); 365 366 lldb::addr_t remote_addr = GetRemoteAddressForLocal(var_ptr_addr); 367 368 // This is a really unfortunae API that sometimes returns local addresses 369 // and sometimes returns remote addresses, based on whether the variable 370 // was relocated during ReportAllocations or not. 371 372 if (remote_addr == LLDB_INVALID_ADDRESS) { 373 remote_addr = var_ptr_addr; 374 } 375 376 if (var_ptr_addr != 0) 377 m_jitted_global_variables.push_back(JittedGlobalVariable( 378 val.getName().str().c_str(), LLDB_INVALID_ADDRESS, remote_addr)); 379 } 380 }; 381 382 for (llvm::GlobalVariable &global_var : m_module->getGlobalList()) { 383 RegisterOneValue(global_var); 384 } 385 386 for (llvm::GlobalAlias &global_alias : m_module->getAliasList()) { 387 RegisterOneValue(global_alias); 388 } 389 390 WriteData(process_sp); 391 392 if (m_failed_lookups.size()) { 393 StreamString ss; 394 395 ss.PutCString("Couldn't lookup symbols:\n"); 396 397 bool emitNewLine = false; 398 399 for (ConstString failed_lookup : m_failed_lookups) { 400 if (emitNewLine) 401 ss.PutCString("\n"); 402 emitNewLine = true; 403 ss.PutCString(" "); 404 ss.PutCString(Mangled(failed_lookup).GetDemangledName().GetStringRef()); 405 } 406 407 m_failed_lookups.clear(); 408 409 error.SetErrorString(ss.GetString()); 410 411 return; 412 } 413 414 m_function_load_addr = LLDB_INVALID_ADDRESS; 415 m_function_end_load_addr = LLDB_INVALID_ADDRESS; 416 417 for (JittedFunction &jitted_function : m_jitted_functions) { 418 jitted_function.m_remote_addr = 419 GetRemoteAddressForLocal(jitted_function.m_local_addr); 420 421 if (!m_name.IsEmpty() && jitted_function.m_name == m_name) { 422 AddrRange func_range = 423 GetRemoteRangeForLocal(jitted_function.m_local_addr); 424 m_function_end_load_addr = func_range.first + func_range.second; 425 m_function_load_addr = jitted_function.m_remote_addr; 426 } 427 } 428 429 if (log) { 430 LLDB_LOGF(log, "Code can be run in the target."); 431 432 StreamString disassembly_stream; 433 434 Status err = DisassembleFunction(disassembly_stream, process_sp); 435 436 if (!err.Success()) { 437 LLDB_LOGF(log, "Couldn't disassemble function : %s", 438 err.AsCString("unknown error")); 439 } else { 440 LLDB_LOGF(log, "Function disassembly:\n%s", disassembly_stream.GetData()); 441 } 442 443 LLDB_LOGF(log, "Sections: "); 444 for (AllocationRecord &record : m_records) { 445 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 446 record.dump(log); 447 448 DataBufferHeap my_buffer(record.m_size, 0); 449 Status err; 450 ReadMemory(my_buffer.GetBytes(), record.m_process_address, 451 record.m_size, err); 452 453 if (err.Success()) { 454 DataExtractor my_extractor(my_buffer.GetBytes(), 455 my_buffer.GetByteSize(), 456 lldb::eByteOrderBig, 8); 457 my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(), 458 record.m_process_address, 16, 459 DataExtractor::TypeUInt8); 460 } 461 } else { 462 record.dump(log); 463 464 DataExtractor my_extractor((const void *)record.m_host_address, 465 record.m_size, lldb::eByteOrderBig, 8); 466 my_extractor.PutToLog(log, 0, record.m_size, record.m_host_address, 16, 467 DataExtractor::TypeUInt8); 468 } 469 } 470 } 471 472 func_addr = m_function_load_addr; 473 func_end = m_function_end_load_addr; 474 475 return; 476 } 477 478 IRExecutionUnit::~IRExecutionUnit() { 479 m_module_up.reset(); 480 m_execution_engine_up.reset(); 481 m_context_up.reset(); 482 } 483 484 IRExecutionUnit::MemoryManager::MemoryManager(IRExecutionUnit &parent) 485 : m_default_mm_up(new llvm::SectionMemoryManager()), m_parent(parent) {} 486 487 IRExecutionUnit::MemoryManager::~MemoryManager() {} 488 489 lldb::SectionType IRExecutionUnit::GetSectionTypeFromSectionName( 490 const llvm::StringRef &name, IRExecutionUnit::AllocationKind alloc_kind) { 491 lldb::SectionType sect_type = lldb::eSectionTypeCode; 492 switch (alloc_kind) { 493 case AllocationKind::Stub: 494 sect_type = lldb::eSectionTypeCode; 495 break; 496 case AllocationKind::Code: 497 sect_type = lldb::eSectionTypeCode; 498 break; 499 case AllocationKind::Data: 500 sect_type = lldb::eSectionTypeData; 501 break; 502 case AllocationKind::Global: 503 sect_type = lldb::eSectionTypeData; 504 break; 505 case AllocationKind::Bytes: 506 sect_type = lldb::eSectionTypeOther; 507 break; 508 } 509 510 if (!name.empty()) { 511 if (name.equals("__text") || name.equals(".text")) 512 sect_type = lldb::eSectionTypeCode; 513 else if (name.equals("__data") || name.equals(".data")) 514 sect_type = lldb::eSectionTypeCode; 515 else if (name.startswith("__debug_") || name.startswith(".debug_")) { 516 const uint32_t name_idx = name[0] == '_' ? 8 : 7; 517 llvm::StringRef dwarf_name(name.substr(name_idx)); 518 switch (dwarf_name[0]) { 519 case 'a': 520 if (dwarf_name.equals("abbrev")) 521 sect_type = lldb::eSectionTypeDWARFDebugAbbrev; 522 else if (dwarf_name.equals("aranges")) 523 sect_type = lldb::eSectionTypeDWARFDebugAranges; 524 else if (dwarf_name.equals("addr")) 525 sect_type = lldb::eSectionTypeDWARFDebugAddr; 526 break; 527 528 case 'f': 529 if (dwarf_name.equals("frame")) 530 sect_type = lldb::eSectionTypeDWARFDebugFrame; 531 break; 532 533 case 'i': 534 if (dwarf_name.equals("info")) 535 sect_type = lldb::eSectionTypeDWARFDebugInfo; 536 break; 537 538 case 'l': 539 if (dwarf_name.equals("line")) 540 sect_type = lldb::eSectionTypeDWARFDebugLine; 541 else if (dwarf_name.equals("loc")) 542 sect_type = lldb::eSectionTypeDWARFDebugLoc; 543 else if (dwarf_name.equals("loclists")) 544 sect_type = lldb::eSectionTypeDWARFDebugLocLists; 545 break; 546 547 case 'm': 548 if (dwarf_name.equals("macinfo")) 549 sect_type = lldb::eSectionTypeDWARFDebugMacInfo; 550 break; 551 552 case 'p': 553 if (dwarf_name.equals("pubnames")) 554 sect_type = lldb::eSectionTypeDWARFDebugPubNames; 555 else if (dwarf_name.equals("pubtypes")) 556 sect_type = lldb::eSectionTypeDWARFDebugPubTypes; 557 break; 558 559 case 's': 560 if (dwarf_name.equals("str")) 561 sect_type = lldb::eSectionTypeDWARFDebugStr; 562 else if (dwarf_name.equals("str_offsets")) 563 sect_type = lldb::eSectionTypeDWARFDebugStrOffsets; 564 break; 565 566 case 'r': 567 if (dwarf_name.equals("ranges")) 568 sect_type = lldb::eSectionTypeDWARFDebugRanges; 569 break; 570 571 default: 572 break; 573 } 574 } else if (name.startswith("__apple_") || name.startswith(".apple_")) 575 sect_type = lldb::eSectionTypeInvalid; 576 else if (name.equals("__objc_imageinfo")) 577 sect_type = lldb::eSectionTypeOther; 578 } 579 return sect_type; 580 } 581 582 uint8_t *IRExecutionUnit::MemoryManager::allocateCodeSection( 583 uintptr_t Size, unsigned Alignment, unsigned SectionID, 584 llvm::StringRef SectionName) { 585 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 586 587 uint8_t *return_value = m_default_mm_up->allocateCodeSection( 588 Size, Alignment, SectionID, SectionName); 589 590 m_parent.m_records.push_back(AllocationRecord( 591 (uintptr_t)return_value, 592 lldb::ePermissionsReadable | lldb::ePermissionsExecutable, 593 GetSectionTypeFromSectionName(SectionName, AllocationKind::Code), Size, 594 Alignment, SectionID, SectionName.str().c_str())); 595 596 LLDB_LOGF(log, 597 "IRExecutionUnit::allocateCodeSection(Size=0x%" PRIx64 598 ", Alignment=%u, SectionID=%u) = %p", 599 (uint64_t)Size, Alignment, SectionID, (void *)return_value); 600 601 if (m_parent.m_reported_allocations) { 602 Status err; 603 lldb::ProcessSP process_sp = 604 m_parent.GetBestExecutionContextScope()->CalculateProcess(); 605 606 m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back()); 607 } 608 609 return return_value; 610 } 611 612 uint8_t *IRExecutionUnit::MemoryManager::allocateDataSection( 613 uintptr_t Size, unsigned Alignment, unsigned SectionID, 614 llvm::StringRef SectionName, bool IsReadOnly) { 615 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 616 617 uint8_t *return_value = m_default_mm_up->allocateDataSection( 618 Size, Alignment, SectionID, SectionName, IsReadOnly); 619 620 uint32_t permissions = lldb::ePermissionsReadable; 621 if (!IsReadOnly) 622 permissions |= lldb::ePermissionsWritable; 623 m_parent.m_records.push_back(AllocationRecord( 624 (uintptr_t)return_value, permissions, 625 GetSectionTypeFromSectionName(SectionName, AllocationKind::Data), Size, 626 Alignment, SectionID, SectionName.str().c_str())); 627 LLDB_LOGF(log, 628 "IRExecutionUnit::allocateDataSection(Size=0x%" PRIx64 629 ", Alignment=%u, SectionID=%u) = %p", 630 (uint64_t)Size, Alignment, SectionID, (void *)return_value); 631 632 if (m_parent.m_reported_allocations) { 633 Status err; 634 lldb::ProcessSP process_sp = 635 m_parent.GetBestExecutionContextScope()->CalculateProcess(); 636 637 m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back()); 638 } 639 640 return return_value; 641 } 642 643 static ConstString FindBestAlternateMangledName(ConstString demangled, 644 const SymbolContext &sym_ctx) { 645 CPlusPlusLanguage::MethodName cpp_name(demangled); 646 std::string scope_qualified_name = cpp_name.GetScopeQualifiedName(); 647 648 if (!scope_qualified_name.size()) 649 return ConstString(); 650 651 if (!sym_ctx.module_sp) 652 return ConstString(); 653 654 lldb_private::SymbolFile *sym_file = sym_ctx.module_sp->GetSymbolFile(); 655 if (!sym_file) 656 return ConstString(); 657 658 std::vector<ConstString> alternates; 659 sym_file->GetMangledNamesForFunction(scope_qualified_name, alternates); 660 661 std::vector<ConstString> param_and_qual_matches; 662 std::vector<ConstString> param_matches; 663 for (size_t i = 0; i < alternates.size(); i++) { 664 ConstString alternate_mangled_name = alternates[i]; 665 Mangled mangled(alternate_mangled_name); 666 ConstString demangled = mangled.GetDemangledName(); 667 668 CPlusPlusLanguage::MethodName alternate_cpp_name(demangled); 669 if (!cpp_name.IsValid()) 670 continue; 671 672 if (alternate_cpp_name.GetArguments() == cpp_name.GetArguments()) { 673 if (alternate_cpp_name.GetQualifiers() == cpp_name.GetQualifiers()) 674 param_and_qual_matches.push_back(alternate_mangled_name); 675 else 676 param_matches.push_back(alternate_mangled_name); 677 } 678 } 679 680 if (param_and_qual_matches.size()) 681 return param_and_qual_matches[0]; // It is assumed that there will be only 682 // one! 683 else if (param_matches.size()) 684 return param_matches[0]; // Return one of them as a best match 685 else 686 return ConstString(); 687 } 688 689 struct IRExecutionUnit::SearchSpec { 690 ConstString name; 691 lldb::FunctionNameType mask; 692 693 SearchSpec(ConstString n, 694 lldb::FunctionNameType m = lldb::eFunctionNameTypeFull) 695 : name(n), mask(m) {} 696 }; 697 698 void IRExecutionUnit::CollectCandidateCNames( 699 std::vector<IRExecutionUnit::SearchSpec> &C_specs, 700 ConstString name) { 701 if (m_strip_underscore && name.AsCString()[0] == '_') 702 C_specs.insert(C_specs.begin(), ConstString(&name.AsCString()[1])); 703 C_specs.push_back(SearchSpec(name)); 704 } 705 706 void IRExecutionUnit::CollectCandidateCPlusPlusNames( 707 std::vector<IRExecutionUnit::SearchSpec> &CPP_specs, 708 const std::vector<SearchSpec> &C_specs, const SymbolContext &sc) { 709 for (const SearchSpec &C_spec : C_specs) { 710 ConstString name = C_spec.name; 711 712 if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) { 713 Mangled mangled(name); 714 ConstString demangled = mangled.GetDemangledName(); 715 716 if (demangled) { 717 ConstString best_alternate_mangled_name = 718 FindBestAlternateMangledName(demangled, sc); 719 720 if (best_alternate_mangled_name) { 721 CPP_specs.push_back(best_alternate_mangled_name); 722 } 723 } 724 } 725 726 std::set<ConstString> alternates; 727 CPlusPlusLanguage::FindAlternateFunctionManglings(name, alternates); 728 CPP_specs.insert(CPP_specs.end(), alternates.begin(), alternates.end()); 729 } 730 } 731 732 void IRExecutionUnit::CollectFallbackNames( 733 std::vector<SearchSpec> &fallback_specs, 734 const std::vector<SearchSpec> &C_specs) { 735 // As a last-ditch fallback, try the base name for C++ names. It's terrible, 736 // but the DWARF doesn't always encode "extern C" correctly. 737 738 for (const SearchSpec &C_spec : C_specs) { 739 ConstString name = C_spec.name; 740 741 if (!CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) 742 continue; 743 744 Mangled mangled_name(name); 745 ConstString demangled_name = mangled_name.GetDemangledName(); 746 if (demangled_name.IsEmpty()) 747 continue; 748 749 const char *demangled_cstr = demangled_name.AsCString(); 750 const char *lparen_loc = strchr(demangled_cstr, '('); 751 if (!lparen_loc) 752 continue; 753 754 llvm::StringRef base_name(demangled_cstr, 755 lparen_loc - demangled_cstr); 756 fallback_specs.push_back(ConstString(base_name)); 757 } 758 } 759 760 lldb::addr_t IRExecutionUnit::FindInSymbols( 761 const std::vector<IRExecutionUnit::SearchSpec> &specs, 762 const lldb_private::SymbolContext &sc, 763 bool &symbol_was_missing_weak) { 764 symbol_was_missing_weak = false; 765 Target *target = sc.target_sp.get(); 766 767 if (!target) { 768 // we shouldn't be doing any symbol lookup at all without a target 769 return LLDB_INVALID_ADDRESS; 770 } 771 772 for (const SearchSpec &spec : specs) { 773 SymbolContextList sc_list; 774 775 lldb::addr_t best_internal_load_address = LLDB_INVALID_ADDRESS; 776 777 std::function<bool(lldb::addr_t &, SymbolContextList &, 778 const lldb_private::SymbolContext &)> 779 get_external_load_address = [&best_internal_load_address, target, 780 &symbol_was_missing_weak]( 781 lldb::addr_t &load_address, SymbolContextList &sc_list, 782 const lldb_private::SymbolContext &sc) -> lldb::addr_t { 783 load_address = LLDB_INVALID_ADDRESS; 784 785 if (sc_list.GetSize() == 0) 786 return false; 787 788 // missing_weak_symbol will be true only if we found only weak undefined 789 // references to this symbol. 790 symbol_was_missing_weak = true; 791 for (auto candidate_sc : sc_list.SymbolContexts()) { 792 // Only symbols can be weak undefined: 793 if (!candidate_sc.symbol) 794 symbol_was_missing_weak = false; 795 else if (candidate_sc.symbol->GetType() != lldb::eSymbolTypeUndefined 796 || !candidate_sc.symbol->IsWeak()) 797 symbol_was_missing_weak = false; 798 799 const bool is_external = 800 (candidate_sc.function) || 801 (candidate_sc.symbol && candidate_sc.symbol->IsExternal()); 802 if (candidate_sc.symbol) { 803 load_address = candidate_sc.symbol->ResolveCallableAddress(*target); 804 805 if (load_address == LLDB_INVALID_ADDRESS) { 806 if (target->GetProcessSP()) 807 load_address = 808 candidate_sc.symbol->GetAddress().GetLoadAddress(target); 809 else 810 load_address = candidate_sc.symbol->GetAddress().GetFileAddress(); 811 } 812 } 813 814 if (load_address == LLDB_INVALID_ADDRESS && candidate_sc.function) { 815 if (target->GetProcessSP()) 816 load_address = candidate_sc.function->GetAddressRange() 817 .GetBaseAddress() 818 .GetLoadAddress(target); 819 else 820 load_address = candidate_sc.function->GetAddressRange() 821 .GetBaseAddress() 822 .GetFileAddress(); 823 } 824 825 if (load_address != LLDB_INVALID_ADDRESS) { 826 if (is_external) { 827 return true; 828 } else if (best_internal_load_address == LLDB_INVALID_ADDRESS) { 829 best_internal_load_address = load_address; 830 load_address = LLDB_INVALID_ADDRESS; 831 } 832 } 833 } 834 835 // You test the address of a weak symbol against NULL to see if it is 836 // present. So we should return 0 for a missing weak symbol. 837 if (symbol_was_missing_weak) { 838 load_address = 0; 839 return true; 840 } 841 842 return false; 843 }; 844 845 if (sc.module_sp) { 846 sc.module_sp->FindFunctions(spec.name, CompilerDeclContext(), spec.mask, 847 true, // include_symbols 848 false, // include_inlines 849 sc_list); 850 } 851 852 lldb::addr_t load_address = LLDB_INVALID_ADDRESS; 853 854 if (get_external_load_address(load_address, sc_list, sc)) { 855 return load_address; 856 } else { 857 sc_list.Clear(); 858 } 859 860 if (sc_list.GetSize() == 0 && sc.target_sp) { 861 sc.target_sp->GetImages().FindFunctions(spec.name, spec.mask, 862 true, // include_symbols 863 false, // include_inlines 864 sc_list); 865 } 866 867 if (get_external_load_address(load_address, sc_list, sc)) { 868 return load_address; 869 } else { 870 sc_list.Clear(); 871 } 872 873 if (sc_list.GetSize() == 0 && sc.target_sp) { 874 sc.target_sp->GetImages().FindSymbolsWithNameAndType( 875 spec.name, lldb::eSymbolTypeAny, sc_list); 876 } 877 878 if (get_external_load_address(load_address, sc_list, sc)) { 879 return load_address; 880 } 881 // if there are any searches we try after this, add an sc_list.Clear() in 882 // an "else" clause here 883 884 if (best_internal_load_address != LLDB_INVALID_ADDRESS) { 885 return best_internal_load_address; 886 } 887 } 888 889 return LLDB_INVALID_ADDRESS; 890 } 891 892 lldb::addr_t 893 IRExecutionUnit::FindInRuntimes(const std::vector<SearchSpec> &specs, 894 const lldb_private::SymbolContext &sc) { 895 lldb::TargetSP target_sp = sc.target_sp; 896 897 if (!target_sp) { 898 return LLDB_INVALID_ADDRESS; 899 } 900 901 lldb::ProcessSP process_sp = sc.target_sp->GetProcessSP(); 902 903 if (!process_sp) { 904 return LLDB_INVALID_ADDRESS; 905 } 906 907 for (const SearchSpec &spec : specs) { 908 for (LanguageRuntime *runtime : process_sp->GetLanguageRuntimes()) { 909 lldb::addr_t symbol_load_addr = runtime->LookupRuntimeSymbol(spec.name); 910 911 if (symbol_load_addr != LLDB_INVALID_ADDRESS) 912 return symbol_load_addr; 913 } 914 } 915 916 return LLDB_INVALID_ADDRESS; 917 } 918 919 lldb::addr_t IRExecutionUnit::FindInUserDefinedSymbols( 920 const std::vector<SearchSpec> &specs, 921 const lldb_private::SymbolContext &sc) { 922 lldb::TargetSP target_sp = sc.target_sp; 923 924 for (const SearchSpec &spec : specs) { 925 lldb::addr_t symbol_load_addr = target_sp->GetPersistentSymbol(spec.name); 926 927 if (symbol_load_addr != LLDB_INVALID_ADDRESS) 928 return symbol_load_addr; 929 } 930 931 return LLDB_INVALID_ADDRESS; 932 } 933 934 lldb::addr_t 935 IRExecutionUnit::FindSymbol(lldb_private::ConstString name, bool &missing_weak) { 936 std::vector<SearchSpec> candidate_C_names; 937 std::vector<SearchSpec> candidate_CPlusPlus_names; 938 939 CollectCandidateCNames(candidate_C_names, name); 940 941 lldb::addr_t ret = FindInSymbols(candidate_C_names, m_sym_ctx, missing_weak); 942 if (ret != LLDB_INVALID_ADDRESS) 943 return ret; 944 945 // If we find the symbol in runtimes or user defined symbols it can't be 946 // a missing weak symbol. 947 missing_weak = false; 948 ret = FindInRuntimes(candidate_C_names, m_sym_ctx); 949 if (ret != LLDB_INVALID_ADDRESS) 950 return ret; 951 952 ret = FindInUserDefinedSymbols(candidate_C_names, m_sym_ctx); 953 if (ret != LLDB_INVALID_ADDRESS) 954 return ret; 955 956 CollectCandidateCPlusPlusNames(candidate_CPlusPlus_names, candidate_C_names, 957 m_sym_ctx); 958 ret = FindInSymbols(candidate_CPlusPlus_names, m_sym_ctx, missing_weak); 959 if (ret != LLDB_INVALID_ADDRESS) 960 return ret; 961 962 std::vector<SearchSpec> candidate_fallback_names; 963 964 CollectFallbackNames(candidate_fallback_names, candidate_C_names); 965 ret = FindInSymbols(candidate_fallback_names, m_sym_ctx, missing_weak); 966 967 return ret; 968 } 969 970 void IRExecutionUnit::GetStaticInitializers( 971 std::vector<lldb::addr_t> &static_initializers) { 972 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 973 974 llvm::GlobalVariable *global_ctors = 975 m_module->getNamedGlobal("llvm.global_ctors"); 976 if (!global_ctors) { 977 LLDB_LOG(log, "Couldn't find llvm.global_ctors."); 978 return; 979 } 980 auto *ctor_array = 981 llvm::dyn_cast<llvm::ConstantArray>(global_ctors->getInitializer()); 982 if (!ctor_array) { 983 LLDB_LOG(log, "llvm.global_ctors not a ConstantArray."); 984 return; 985 } 986 987 for (llvm::Use &ctor_use : ctor_array->operands()) { 988 auto *ctor_struct = llvm::dyn_cast<llvm::ConstantStruct>(ctor_use); 989 if (!ctor_struct) 990 continue; 991 // this is standardized 992 lldbassert(ctor_struct->getNumOperands() == 3); 993 auto *ctor_function = 994 llvm::dyn_cast<llvm::Function>(ctor_struct->getOperand(1)); 995 if (!ctor_function) { 996 LLDB_LOG(log, "global_ctor doesn't contain an llvm::Function"); 997 continue; 998 } 999 1000 ConstString ctor_function_name(ctor_function->getName().str()); 1001 LLDB_LOG(log, "Looking for callable jitted function with name {0}.", 1002 ctor_function_name); 1003 1004 for (JittedFunction &jitted_function : m_jitted_functions) { 1005 if (ctor_function_name != jitted_function.m_name) 1006 continue; 1007 if (jitted_function.m_remote_addr == LLDB_INVALID_ADDRESS) { 1008 LLDB_LOG(log, "Found jitted function with invalid address."); 1009 continue; 1010 } 1011 static_initializers.push_back(jitted_function.m_remote_addr); 1012 LLDB_LOG(log, "Calling function at address {0:x}.", 1013 jitted_function.m_remote_addr); 1014 break; 1015 } 1016 } 1017 } 1018 1019 llvm::JITSymbol 1020 IRExecutionUnit::MemoryManager::findSymbol(const std::string &Name) { 1021 bool missing_weak = false; 1022 uint64_t addr = GetSymbolAddressAndPresence(Name, missing_weak); 1023 // This is a weak symbol: 1024 if (missing_weak) 1025 return llvm::JITSymbol(addr, 1026 llvm::JITSymbolFlags::Exported | llvm::JITSymbolFlags::Weak); 1027 else 1028 return llvm::JITSymbol(addr, llvm::JITSymbolFlags::Exported); 1029 } 1030 1031 uint64_t 1032 IRExecutionUnit::MemoryManager::getSymbolAddress(const std::string &Name) { 1033 bool missing_weak = false; 1034 return GetSymbolAddressAndPresence(Name, missing_weak); 1035 } 1036 1037 uint64_t 1038 IRExecutionUnit::MemoryManager::GetSymbolAddressAndPresence( 1039 const std::string &Name, bool &missing_weak) { 1040 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1041 1042 ConstString name_cs(Name.c_str()); 1043 1044 lldb::addr_t ret = m_parent.FindSymbol(name_cs, missing_weak); 1045 1046 if (ret == LLDB_INVALID_ADDRESS) { 1047 LLDB_LOGF(log, 1048 "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = <not found>", 1049 Name.c_str()); 1050 1051 m_parent.ReportSymbolLookupError(name_cs); 1052 return 0; 1053 } else { 1054 LLDB_LOGF(log, "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = %" PRIx64, 1055 Name.c_str(), ret); 1056 return ret; 1057 } 1058 } 1059 1060 void *IRExecutionUnit::MemoryManager::getPointerToNamedFunction( 1061 const std::string &Name, bool AbortOnFailure) { 1062 return (void *)getSymbolAddress(Name); 1063 } 1064 1065 lldb::addr_t 1066 IRExecutionUnit::GetRemoteAddressForLocal(lldb::addr_t local_address) { 1067 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1068 1069 for (AllocationRecord &record : m_records) { 1070 if (local_address >= record.m_host_address && 1071 local_address < record.m_host_address + record.m_size) { 1072 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1073 return LLDB_INVALID_ADDRESS; 1074 1075 lldb::addr_t ret = 1076 record.m_process_address + (local_address - record.m_host_address); 1077 1078 LLDB_LOGF(log, 1079 "IRExecutionUnit::GetRemoteAddressForLocal() found 0x%" PRIx64 1080 " in [0x%" PRIx64 "..0x%" PRIx64 "], and returned 0x%" PRIx64 1081 " from [0x%" PRIx64 "..0x%" PRIx64 "].", 1082 local_address, (uint64_t)record.m_host_address, 1083 (uint64_t)record.m_host_address + (uint64_t)record.m_size, ret, 1084 record.m_process_address, 1085 record.m_process_address + record.m_size); 1086 1087 return ret; 1088 } 1089 } 1090 1091 return LLDB_INVALID_ADDRESS; 1092 } 1093 1094 IRExecutionUnit::AddrRange 1095 IRExecutionUnit::GetRemoteRangeForLocal(lldb::addr_t local_address) { 1096 for (AllocationRecord &record : m_records) { 1097 if (local_address >= record.m_host_address && 1098 local_address < record.m_host_address + record.m_size) { 1099 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1100 return AddrRange(0, 0); 1101 1102 return AddrRange(record.m_process_address, record.m_size); 1103 } 1104 } 1105 1106 return AddrRange(0, 0); 1107 } 1108 1109 bool IRExecutionUnit::CommitOneAllocation(lldb::ProcessSP &process_sp, 1110 Status &error, 1111 AllocationRecord &record) { 1112 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1113 return true; 1114 } 1115 1116 switch (record.m_sect_type) { 1117 case lldb::eSectionTypeInvalid: 1118 case lldb::eSectionTypeDWARFDebugAbbrev: 1119 case lldb::eSectionTypeDWARFDebugAddr: 1120 case lldb::eSectionTypeDWARFDebugAranges: 1121 case lldb::eSectionTypeDWARFDebugCuIndex: 1122 case lldb::eSectionTypeDWARFDebugFrame: 1123 case lldb::eSectionTypeDWARFDebugInfo: 1124 case lldb::eSectionTypeDWARFDebugLine: 1125 case lldb::eSectionTypeDWARFDebugLoc: 1126 case lldb::eSectionTypeDWARFDebugLocLists: 1127 case lldb::eSectionTypeDWARFDebugMacInfo: 1128 case lldb::eSectionTypeDWARFDebugPubNames: 1129 case lldb::eSectionTypeDWARFDebugPubTypes: 1130 case lldb::eSectionTypeDWARFDebugRanges: 1131 case lldb::eSectionTypeDWARFDebugStr: 1132 case lldb::eSectionTypeDWARFDebugStrOffsets: 1133 case lldb::eSectionTypeDWARFAppleNames: 1134 case lldb::eSectionTypeDWARFAppleTypes: 1135 case lldb::eSectionTypeDWARFAppleNamespaces: 1136 case lldb::eSectionTypeDWARFAppleObjC: 1137 case lldb::eSectionTypeDWARFGNUDebugAltLink: 1138 error.Clear(); 1139 break; 1140 default: 1141 const bool zero_memory = false; 1142 record.m_process_address = 1143 Malloc(record.m_size, record.m_alignment, record.m_permissions, 1144 eAllocationPolicyProcessOnly, zero_memory, error); 1145 break; 1146 } 1147 1148 return error.Success(); 1149 } 1150 1151 bool IRExecutionUnit::CommitAllocations(lldb::ProcessSP &process_sp) { 1152 bool ret = true; 1153 1154 lldb_private::Status err; 1155 1156 for (AllocationRecord &record : m_records) { 1157 ret = CommitOneAllocation(process_sp, err, record); 1158 1159 if (!ret) { 1160 break; 1161 } 1162 } 1163 1164 if (!ret) { 1165 for (AllocationRecord &record : m_records) { 1166 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1167 Free(record.m_process_address, err); 1168 record.m_process_address = LLDB_INVALID_ADDRESS; 1169 } 1170 } 1171 } 1172 1173 return ret; 1174 } 1175 1176 void IRExecutionUnit::ReportAllocations(llvm::ExecutionEngine &engine) { 1177 m_reported_allocations = true; 1178 1179 for (AllocationRecord &record : m_records) { 1180 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1181 continue; 1182 1183 if (record.m_section_id == eSectionIDInvalid) 1184 continue; 1185 1186 engine.mapSectionAddress((void *)record.m_host_address, 1187 record.m_process_address); 1188 } 1189 1190 // Trigger re-application of relocations. 1191 engine.finalizeObject(); 1192 } 1193 1194 bool IRExecutionUnit::WriteData(lldb::ProcessSP &process_sp) { 1195 bool wrote_something = false; 1196 for (AllocationRecord &record : m_records) { 1197 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1198 lldb_private::Status err; 1199 WriteMemory(record.m_process_address, (uint8_t *)record.m_host_address, 1200 record.m_size, err); 1201 if (err.Success()) 1202 wrote_something = true; 1203 } 1204 } 1205 return wrote_something; 1206 } 1207 1208 void IRExecutionUnit::AllocationRecord::dump(Log *log) { 1209 if (!log) 1210 return; 1211 1212 LLDB_LOGF(log, 1213 "[0x%llx+0x%llx]->0x%llx (alignment %d, section ID %d, name %s)", 1214 (unsigned long long)m_host_address, (unsigned long long)m_size, 1215 (unsigned long long)m_process_address, (unsigned)m_alignment, 1216 (unsigned)m_section_id, m_name.c_str()); 1217 } 1218 1219 lldb::ByteOrder IRExecutionUnit::GetByteOrder() const { 1220 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1221 return exe_ctx.GetByteOrder(); 1222 } 1223 1224 uint32_t IRExecutionUnit::GetAddressByteSize() const { 1225 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1226 return exe_ctx.GetAddressByteSize(); 1227 } 1228 1229 void IRExecutionUnit::PopulateSymtab(lldb_private::ObjectFile *obj_file, 1230 lldb_private::Symtab &symtab) { 1231 // No symbols yet... 1232 } 1233 1234 void IRExecutionUnit::PopulateSectionList( 1235 lldb_private::ObjectFile *obj_file, 1236 lldb_private::SectionList §ion_list) { 1237 for (AllocationRecord &record : m_records) { 1238 if (record.m_size > 0) { 1239 lldb::SectionSP section_sp(new lldb_private::Section( 1240 obj_file->GetModule(), obj_file, record.m_section_id, 1241 ConstString(record.m_name), record.m_sect_type, 1242 record.m_process_address, record.m_size, 1243 record.m_host_address, // file_offset (which is the host address for 1244 // the data) 1245 record.m_size, // file_size 1246 0, 1247 record.m_permissions)); // flags 1248 section_list.AddSection(section_sp); 1249 } 1250 } 1251 } 1252 1253 ArchSpec IRExecutionUnit::GetArchitecture() { 1254 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1255 if(Target *target = exe_ctx.GetTargetPtr()) 1256 return target->GetArchitecture(); 1257 return ArchSpec(); 1258 } 1259 1260 lldb::ModuleSP IRExecutionUnit::GetJITModule() { 1261 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1262 Target *target = exe_ctx.GetTargetPtr(); 1263 if (!target) 1264 return nullptr; 1265 1266 auto Delegate = std::static_pointer_cast<lldb_private::ObjectFileJITDelegate>( 1267 shared_from_this()); 1268 1269 lldb::ModuleSP jit_module_sp = 1270 lldb_private::Module::CreateModuleFromObjectFile<ObjectFileJIT>(Delegate); 1271 if (!jit_module_sp) 1272 return nullptr; 1273 1274 bool changed = false; 1275 jit_module_sp->SetLoadAddress(*target, 0, true, changed); 1276 return jit_module_sp; 1277 } 1278