1 //===-- IRExecutionUnit.cpp -------------------------------------*- C++ -*-===// 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() 269 ? llvm::Reloc::PIC_ 270 : llvm::Reloc::Static) 271 .setMCJITMemoryManager( 272 std::unique_ptr<MemoryManager>(new MemoryManager(*this))) 273 .setOptLevel(llvm::CodeGenOpt::Less); 274 275 llvm::StringRef mArch; 276 llvm::StringRef mCPU; 277 llvm::SmallVector<std::string, 0> mAttrs; 278 279 for (std::string &feature : m_cpu_features) 280 mAttrs.push_back(feature); 281 282 llvm::TargetMachine *target_machine = 283 builder.selectTarget(triple, mArch, mCPU, mAttrs); 284 285 m_execution_engine_up.reset(builder.create(target_machine)); 286 287 if (!m_execution_engine_up) { 288 error.SetErrorToGenericError(); 289 error.SetErrorStringWithFormat("Couldn't JIT the function: %s", 290 error_string.c_str()); 291 return; 292 } 293 294 m_strip_underscore = 295 (m_execution_engine_up->getDataLayout().getGlobalPrefix() == '_'); 296 297 class ObjectDumper : public llvm::ObjectCache { 298 public: 299 void notifyObjectCompiled(const llvm::Module *module, 300 llvm::MemoryBufferRef object) override { 301 int fd = 0; 302 llvm::SmallVector<char, 256> result_path; 303 std::string object_name_model = 304 "jit-object-" + module->getModuleIdentifier() + "-%%%.o"; 305 (void)llvm::sys::fs::createUniqueFile(object_name_model, fd, result_path); 306 llvm::raw_fd_ostream fds(fd, true); 307 fds.write(object.getBufferStart(), object.getBufferSize()); 308 } 309 310 std::unique_ptr<llvm::MemoryBuffer> 311 getObject(const llvm::Module *module) override { 312 // Return nothing - we're just abusing the object-cache mechanism to dump 313 // objects. 314 return nullptr; 315 } 316 }; 317 318 if (process_sp->GetTarget().GetEnableSaveObjects()) { 319 m_object_cache_up = std::make_unique<ObjectDumper>(); 320 m_execution_engine_up->setObjectCache(m_object_cache_up.get()); 321 } 322 323 // Make sure we see all sections, including ones that don't have 324 // relocations... 325 m_execution_engine_up->setProcessAllSections(true); 326 327 m_execution_engine_up->DisableLazyCompilation(); 328 329 for (llvm::Function &function : *m_module) { 330 if (function.isDeclaration() || function.hasPrivateLinkage()) 331 continue; 332 333 const bool external = 334 function.hasExternalLinkage() || function.hasLinkOnceODRLinkage(); 335 336 void *fun_ptr = m_execution_engine_up->getPointerToFunction(&function); 337 338 if (!error.Success()) { 339 // We got an error through our callback! 340 return; 341 } 342 343 if (!fun_ptr) { 344 error.SetErrorToGenericError(); 345 error.SetErrorStringWithFormat( 346 "'%s' was in the JITted module but wasn't lowered", 347 function.getName().str().c_str()); 348 return; 349 } 350 m_jitted_functions.push_back(JittedFunction( 351 function.getName().str().c_str(), external, reinterpret_cast<uintptr_t>(fun_ptr))); 352 } 353 354 CommitAllocations(process_sp); 355 ReportAllocations(*m_execution_engine_up); 356 357 // We have to do this after calling ReportAllocations because for the MCJIT, 358 // getGlobalValueAddress will cause the JIT to perform all relocations. That 359 // can only be done once, and has to happen after we do the remapping from 360 // local -> remote. That means we don't know the local address of the 361 // Variables, but we don't need that for anything, so that's okay. 362 363 std::function<void(llvm::GlobalValue &)> RegisterOneValue = [this]( 364 llvm::GlobalValue &val) { 365 if (val.hasExternalLinkage() && !val.isDeclaration()) { 366 uint64_t var_ptr_addr = 367 m_execution_engine_up->getGlobalValueAddress(val.getName().str()); 368 369 lldb::addr_t remote_addr = GetRemoteAddressForLocal(var_ptr_addr); 370 371 // This is a really unfortunae API that sometimes returns local addresses 372 // and sometimes returns remote addresses, based on whether the variable 373 // was relocated during ReportAllocations or not. 374 375 if (remote_addr == LLDB_INVALID_ADDRESS) { 376 remote_addr = var_ptr_addr; 377 } 378 379 if (var_ptr_addr != 0) 380 m_jitted_global_variables.push_back(JittedGlobalVariable( 381 val.getName().str().c_str(), LLDB_INVALID_ADDRESS, remote_addr)); 382 } 383 }; 384 385 for (llvm::GlobalVariable &global_var : m_module->getGlobalList()) { 386 RegisterOneValue(global_var); 387 } 388 389 for (llvm::GlobalAlias &global_alias : m_module->getAliasList()) { 390 RegisterOneValue(global_alias); 391 } 392 393 WriteData(process_sp); 394 395 if (m_failed_lookups.size()) { 396 StreamString ss; 397 398 ss.PutCString("Couldn't lookup symbols:\n"); 399 400 bool emitNewLine = false; 401 402 for (ConstString failed_lookup : m_failed_lookups) { 403 if (emitNewLine) 404 ss.PutCString("\n"); 405 emitNewLine = true; 406 ss.PutCString(" "); 407 ss.PutCString(Mangled(failed_lookup) 408 .GetDemangledName(lldb::eLanguageTypeObjC_plus_plus) 409 .AsCString()); 410 } 411 412 m_failed_lookups.clear(); 413 414 error.SetErrorString(ss.GetString()); 415 416 return; 417 } 418 419 m_function_load_addr = LLDB_INVALID_ADDRESS; 420 m_function_end_load_addr = LLDB_INVALID_ADDRESS; 421 422 for (JittedFunction &jitted_function : m_jitted_functions) { 423 jitted_function.m_remote_addr = 424 GetRemoteAddressForLocal(jitted_function.m_local_addr); 425 426 if (!m_name.IsEmpty() && jitted_function.m_name == m_name) { 427 AddrRange func_range = 428 GetRemoteRangeForLocal(jitted_function.m_local_addr); 429 m_function_end_load_addr = func_range.first + func_range.second; 430 m_function_load_addr = jitted_function.m_remote_addr; 431 } 432 } 433 434 if (log) { 435 LLDB_LOGF(log, "Code can be run in the target."); 436 437 StreamString disassembly_stream; 438 439 Status err = DisassembleFunction(disassembly_stream, process_sp); 440 441 if (!err.Success()) { 442 LLDB_LOGF(log, "Couldn't disassemble function : %s", 443 err.AsCString("unknown error")); 444 } else { 445 LLDB_LOGF(log, "Function disassembly:\n%s", disassembly_stream.GetData()); 446 } 447 448 LLDB_LOGF(log, "Sections: "); 449 for (AllocationRecord &record : m_records) { 450 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 451 record.dump(log); 452 453 DataBufferHeap my_buffer(record.m_size, 0); 454 Status err; 455 ReadMemory(my_buffer.GetBytes(), record.m_process_address, 456 record.m_size, err); 457 458 if (err.Success()) { 459 DataExtractor my_extractor(my_buffer.GetBytes(), 460 my_buffer.GetByteSize(), 461 lldb::eByteOrderBig, 8); 462 my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(), 463 record.m_process_address, 16, 464 DataExtractor::TypeUInt8); 465 } 466 } else { 467 record.dump(log); 468 469 DataExtractor my_extractor((const void *)record.m_host_address, 470 record.m_size, lldb::eByteOrderBig, 8); 471 my_extractor.PutToLog(log, 0, record.m_size, record.m_host_address, 16, 472 DataExtractor::TypeUInt8); 473 } 474 } 475 } 476 477 func_addr = m_function_load_addr; 478 func_end = m_function_end_load_addr; 479 480 return; 481 } 482 483 IRExecutionUnit::~IRExecutionUnit() { 484 m_module_up.reset(); 485 m_execution_engine_up.reset(); 486 m_context_up.reset(); 487 } 488 489 IRExecutionUnit::MemoryManager::MemoryManager(IRExecutionUnit &parent) 490 : m_default_mm_up(new llvm::SectionMemoryManager()), m_parent(parent) {} 491 492 IRExecutionUnit::MemoryManager::~MemoryManager() {} 493 494 lldb::SectionType IRExecutionUnit::GetSectionTypeFromSectionName( 495 const llvm::StringRef &name, IRExecutionUnit::AllocationKind alloc_kind) { 496 lldb::SectionType sect_type = lldb::eSectionTypeCode; 497 switch (alloc_kind) { 498 case AllocationKind::Stub: 499 sect_type = lldb::eSectionTypeCode; 500 break; 501 case AllocationKind::Code: 502 sect_type = lldb::eSectionTypeCode; 503 break; 504 case AllocationKind::Data: 505 sect_type = lldb::eSectionTypeData; 506 break; 507 case AllocationKind::Global: 508 sect_type = lldb::eSectionTypeData; 509 break; 510 case AllocationKind::Bytes: 511 sect_type = lldb::eSectionTypeOther; 512 break; 513 } 514 515 if (!name.empty()) { 516 if (name.equals("__text") || name.equals(".text")) 517 sect_type = lldb::eSectionTypeCode; 518 else if (name.equals("__data") || name.equals(".data")) 519 sect_type = lldb::eSectionTypeCode; 520 else if (name.startswith("__debug_") || name.startswith(".debug_")) { 521 const uint32_t name_idx = name[0] == '_' ? 8 : 7; 522 llvm::StringRef dwarf_name(name.substr(name_idx)); 523 switch (dwarf_name[0]) { 524 case 'a': 525 if (dwarf_name.equals("abbrev")) 526 sect_type = lldb::eSectionTypeDWARFDebugAbbrev; 527 else if (dwarf_name.equals("aranges")) 528 sect_type = lldb::eSectionTypeDWARFDebugAranges; 529 else if (dwarf_name.equals("addr")) 530 sect_type = lldb::eSectionTypeDWARFDebugAddr; 531 break; 532 533 case 'f': 534 if (dwarf_name.equals("frame")) 535 sect_type = lldb::eSectionTypeDWARFDebugFrame; 536 break; 537 538 case 'i': 539 if (dwarf_name.equals("info")) 540 sect_type = lldb::eSectionTypeDWARFDebugInfo; 541 break; 542 543 case 'l': 544 if (dwarf_name.equals("line")) 545 sect_type = lldb::eSectionTypeDWARFDebugLine; 546 else if (dwarf_name.equals("loc")) 547 sect_type = lldb::eSectionTypeDWARFDebugLoc; 548 else if (dwarf_name.equals("loclists")) 549 sect_type = lldb::eSectionTypeDWARFDebugLocLists; 550 break; 551 552 case 'm': 553 if (dwarf_name.equals("macinfo")) 554 sect_type = lldb::eSectionTypeDWARFDebugMacInfo; 555 break; 556 557 case 'p': 558 if (dwarf_name.equals("pubnames")) 559 sect_type = lldb::eSectionTypeDWARFDebugPubNames; 560 else if (dwarf_name.equals("pubtypes")) 561 sect_type = lldb::eSectionTypeDWARFDebugPubTypes; 562 break; 563 564 case 's': 565 if (dwarf_name.equals("str")) 566 sect_type = lldb::eSectionTypeDWARFDebugStr; 567 else if (dwarf_name.equals("str_offsets")) 568 sect_type = lldb::eSectionTypeDWARFDebugStrOffsets; 569 break; 570 571 case 'r': 572 if (dwarf_name.equals("ranges")) 573 sect_type = lldb::eSectionTypeDWARFDebugRanges; 574 break; 575 576 default: 577 break; 578 } 579 } else if (name.startswith("__apple_") || name.startswith(".apple_")) 580 sect_type = lldb::eSectionTypeInvalid; 581 else if (name.equals("__objc_imageinfo")) 582 sect_type = lldb::eSectionTypeOther; 583 } 584 return sect_type; 585 } 586 587 uint8_t *IRExecutionUnit::MemoryManager::allocateCodeSection( 588 uintptr_t Size, unsigned Alignment, unsigned SectionID, 589 llvm::StringRef SectionName) { 590 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 591 592 uint8_t *return_value = m_default_mm_up->allocateCodeSection( 593 Size, Alignment, SectionID, SectionName); 594 595 m_parent.m_records.push_back(AllocationRecord( 596 (uintptr_t)return_value, 597 lldb::ePermissionsReadable | lldb::ePermissionsExecutable, 598 GetSectionTypeFromSectionName(SectionName, AllocationKind::Code), Size, 599 Alignment, SectionID, SectionName.str().c_str())); 600 601 LLDB_LOGF(log, 602 "IRExecutionUnit::allocateCodeSection(Size=0x%" PRIx64 603 ", Alignment=%u, SectionID=%u) = %p", 604 (uint64_t)Size, Alignment, SectionID, (void *)return_value); 605 606 if (m_parent.m_reported_allocations) { 607 Status err; 608 lldb::ProcessSP process_sp = 609 m_parent.GetBestExecutionContextScope()->CalculateProcess(); 610 611 m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back()); 612 } 613 614 return return_value; 615 } 616 617 uint8_t *IRExecutionUnit::MemoryManager::allocateDataSection( 618 uintptr_t Size, unsigned Alignment, unsigned SectionID, 619 llvm::StringRef SectionName, bool IsReadOnly) { 620 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 621 622 uint8_t *return_value = m_default_mm_up->allocateDataSection( 623 Size, Alignment, SectionID, SectionName, IsReadOnly); 624 625 uint32_t permissions = lldb::ePermissionsReadable; 626 if (!IsReadOnly) 627 permissions |= lldb::ePermissionsWritable; 628 m_parent.m_records.push_back(AllocationRecord( 629 (uintptr_t)return_value, permissions, 630 GetSectionTypeFromSectionName(SectionName, AllocationKind::Data), Size, 631 Alignment, SectionID, SectionName.str().c_str())); 632 LLDB_LOGF(log, 633 "IRExecutionUnit::allocateDataSection(Size=0x%" PRIx64 634 ", Alignment=%u, SectionID=%u) = %p", 635 (uint64_t)Size, Alignment, SectionID, (void *)return_value); 636 637 if (m_parent.m_reported_allocations) { 638 Status err; 639 lldb::ProcessSP process_sp = 640 m_parent.GetBestExecutionContextScope()->CalculateProcess(); 641 642 m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back()); 643 } 644 645 return return_value; 646 } 647 648 static ConstString 649 FindBestAlternateMangledName(ConstString demangled, 650 const lldb::LanguageType &lang_type, 651 const SymbolContext &sym_ctx) { 652 CPlusPlusLanguage::MethodName cpp_name(demangled); 653 std::string scope_qualified_name = cpp_name.GetScopeQualifiedName(); 654 655 if (!scope_qualified_name.size()) 656 return ConstString(); 657 658 if (!sym_ctx.module_sp) 659 return ConstString(); 660 661 lldb_private::SymbolFile *sym_file = sym_ctx.module_sp->GetSymbolFile(); 662 if (!sym_file) 663 return ConstString(); 664 665 std::vector<ConstString> alternates; 666 sym_file->GetMangledNamesForFunction(scope_qualified_name, alternates); 667 668 std::vector<ConstString> param_and_qual_matches; 669 std::vector<ConstString> param_matches; 670 for (size_t i = 0; i < alternates.size(); i++) { 671 ConstString alternate_mangled_name = alternates[i]; 672 Mangled mangled(alternate_mangled_name); 673 ConstString demangled = mangled.GetDemangledName(lang_type); 674 675 CPlusPlusLanguage::MethodName alternate_cpp_name(demangled); 676 if (!cpp_name.IsValid()) 677 continue; 678 679 if (alternate_cpp_name.GetArguments() == cpp_name.GetArguments()) { 680 if (alternate_cpp_name.GetQualifiers() == cpp_name.GetQualifiers()) 681 param_and_qual_matches.push_back(alternate_mangled_name); 682 else 683 param_matches.push_back(alternate_mangled_name); 684 } 685 } 686 687 if (param_and_qual_matches.size()) 688 return param_and_qual_matches[0]; // It is assumed that there will be only 689 // one! 690 else if (param_matches.size()) 691 return param_matches[0]; // Return one of them as a best match 692 else 693 return ConstString(); 694 } 695 696 struct IRExecutionUnit::SearchSpec { 697 ConstString name; 698 lldb::FunctionNameType mask; 699 700 SearchSpec(ConstString n, 701 lldb::FunctionNameType m = lldb::eFunctionNameTypeFull) 702 : name(n), mask(m) {} 703 }; 704 705 void IRExecutionUnit::CollectCandidateCNames( 706 std::vector<IRExecutionUnit::SearchSpec> &C_specs, 707 ConstString name) { 708 if (m_strip_underscore && name.AsCString()[0] == '_') 709 C_specs.insert(C_specs.begin(), ConstString(&name.AsCString()[1])); 710 C_specs.push_back(SearchSpec(name)); 711 } 712 713 void IRExecutionUnit::CollectCandidateCPlusPlusNames( 714 std::vector<IRExecutionUnit::SearchSpec> &CPP_specs, 715 const std::vector<SearchSpec> &C_specs, const SymbolContext &sc) { 716 for (const SearchSpec &C_spec : C_specs) { 717 ConstString name = C_spec.name; 718 719 if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) { 720 Mangled mangled(name); 721 ConstString demangled = 722 mangled.GetDemangledName(lldb::eLanguageTypeC_plus_plus); 723 724 if (demangled) { 725 ConstString best_alternate_mangled_name = FindBestAlternateMangledName( 726 demangled, lldb::eLanguageTypeC_plus_plus, sc); 727 728 if (best_alternate_mangled_name) { 729 CPP_specs.push_back(best_alternate_mangled_name); 730 } 731 } 732 } 733 734 std::set<ConstString> alternates; 735 CPlusPlusLanguage::FindAlternateFunctionManglings(name, alternates); 736 CPP_specs.insert(CPP_specs.end(), alternates.begin(), alternates.end()); 737 } 738 } 739 740 void IRExecutionUnit::CollectFallbackNames( 741 std::vector<SearchSpec> &fallback_specs, 742 const std::vector<SearchSpec> &C_specs) { 743 // As a last-ditch fallback, try the base name for C++ names. It's terrible, 744 // but the DWARF doesn't always encode "extern C" correctly. 745 746 for (const SearchSpec &C_spec : C_specs) { 747 ConstString name = C_spec.name; 748 749 if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) { 750 Mangled mangled_name(name); 751 ConstString demangled_name = 752 mangled_name.GetDemangledName(lldb::eLanguageTypeC_plus_plus); 753 if (!demangled_name.IsEmpty()) { 754 const char *demangled_cstr = demangled_name.AsCString(); 755 const char *lparen_loc = strchr(demangled_cstr, '('); 756 if (lparen_loc) { 757 llvm::StringRef base_name(demangled_cstr, 758 lparen_loc - demangled_cstr); 759 fallback_specs.push_back(ConstString(base_name)); 760 } 761 } 762 } 763 } 764 } 765 766 lldb::addr_t IRExecutionUnit::FindInSymbols( 767 const std::vector<IRExecutionUnit::SearchSpec> &specs, 768 const lldb_private::SymbolContext &sc, 769 bool &symbol_was_missing_weak) { 770 symbol_was_missing_weak = false; 771 Target *target = sc.target_sp.get(); 772 773 if (!target) { 774 // we shouldn't be doing any symbol lookup at all without a target 775 return LLDB_INVALID_ADDRESS; 776 } 777 778 for (const SearchSpec &spec : specs) { 779 SymbolContextList sc_list; 780 781 lldb::addr_t best_internal_load_address = LLDB_INVALID_ADDRESS; 782 783 std::function<bool(lldb::addr_t &, SymbolContextList &, 784 const lldb_private::SymbolContext &)> 785 get_external_load_address = [&best_internal_load_address, target, 786 &symbol_was_missing_weak]( 787 lldb::addr_t &load_address, SymbolContextList &sc_list, 788 const lldb_private::SymbolContext &sc) -> lldb::addr_t { 789 load_address = LLDB_INVALID_ADDRESS; 790 791 if (sc_list.GetSize() == 0) 792 return false; 793 794 // missing_weak_symbol will be true only if we found only weak undefined 795 // references to this symbol. 796 symbol_was_missing_weak = true; 797 for (auto candidate_sc : sc_list.SymbolContexts()) { 798 // Only symbols can be weak undefined: 799 if (!candidate_sc.symbol) 800 symbol_was_missing_weak = false; 801 else if (candidate_sc.symbol->GetType() != lldb::eSymbolTypeUndefined 802 || !candidate_sc.symbol->IsWeak()) 803 symbol_was_missing_weak = false; 804 805 const bool is_external = 806 (candidate_sc.function) || 807 (candidate_sc.symbol && candidate_sc.symbol->IsExternal()); 808 if (candidate_sc.symbol) { 809 load_address = candidate_sc.symbol->ResolveCallableAddress(*target); 810 811 if (load_address == LLDB_INVALID_ADDRESS) { 812 if (target->GetProcessSP()) 813 load_address = 814 candidate_sc.symbol->GetAddress().GetLoadAddress(target); 815 else 816 load_address = candidate_sc.symbol->GetAddress().GetFileAddress(); 817 } 818 } 819 820 if (load_address == LLDB_INVALID_ADDRESS && candidate_sc.function) { 821 if (target->GetProcessSP()) 822 load_address = candidate_sc.function->GetAddressRange() 823 .GetBaseAddress() 824 .GetLoadAddress(target); 825 else 826 load_address = candidate_sc.function->GetAddressRange() 827 .GetBaseAddress() 828 .GetFileAddress(); 829 } 830 831 if (load_address != LLDB_INVALID_ADDRESS) { 832 if (is_external) { 833 return true; 834 } else if (best_internal_load_address == LLDB_INVALID_ADDRESS) { 835 best_internal_load_address = load_address; 836 load_address = LLDB_INVALID_ADDRESS; 837 } 838 } 839 } 840 841 // You test the address of a weak symbol against NULL to see if it is 842 // present. So we should return 0 for a missing weak symbol. 843 if (symbol_was_missing_weak) { 844 load_address = 0; 845 return true; 846 } 847 848 return false; 849 }; 850 851 if (sc.module_sp) { 852 sc.module_sp->FindFunctions(spec.name, nullptr, spec.mask, 853 true, // include_symbols 854 false, // include_inlines 855 sc_list); 856 } 857 858 lldb::addr_t load_address = LLDB_INVALID_ADDRESS; 859 860 if (get_external_load_address(load_address, sc_list, sc)) { 861 return load_address; 862 } else { 863 sc_list.Clear(); 864 } 865 866 if (sc_list.GetSize() == 0 && sc.target_sp) { 867 sc.target_sp->GetImages().FindFunctions(spec.name, spec.mask, 868 true, // include_symbols 869 false, // include_inlines 870 sc_list); 871 } 872 873 if (get_external_load_address(load_address, sc_list, sc)) { 874 return load_address; 875 } else { 876 sc_list.Clear(); 877 } 878 879 if (sc_list.GetSize() == 0 && sc.target_sp) { 880 sc.target_sp->GetImages().FindSymbolsWithNameAndType( 881 spec.name, lldb::eSymbolTypeAny, sc_list); 882 } 883 884 if (get_external_load_address(load_address, sc_list, sc)) { 885 return load_address; 886 } 887 // if there are any searches we try after this, add an sc_list.Clear() in 888 // an "else" clause here 889 890 if (best_internal_load_address != LLDB_INVALID_ADDRESS) { 891 return best_internal_load_address; 892 } 893 } 894 895 return LLDB_INVALID_ADDRESS; 896 } 897 898 lldb::addr_t 899 IRExecutionUnit::FindInRuntimes(const std::vector<SearchSpec> &specs, 900 const lldb_private::SymbolContext &sc) { 901 lldb::TargetSP target_sp = sc.target_sp; 902 903 if (!target_sp) { 904 return LLDB_INVALID_ADDRESS; 905 } 906 907 lldb::ProcessSP process_sp = sc.target_sp->GetProcessSP(); 908 909 if (!process_sp) { 910 return LLDB_INVALID_ADDRESS; 911 } 912 913 for (const SearchSpec &spec : specs) { 914 for (LanguageRuntime *runtime : process_sp->GetLanguageRuntimes()) { 915 lldb::addr_t symbol_load_addr = runtime->LookupRuntimeSymbol(spec.name); 916 917 if (symbol_load_addr != LLDB_INVALID_ADDRESS) 918 return symbol_load_addr; 919 } 920 } 921 922 return LLDB_INVALID_ADDRESS; 923 } 924 925 lldb::addr_t IRExecutionUnit::FindInUserDefinedSymbols( 926 const std::vector<SearchSpec> &specs, 927 const lldb_private::SymbolContext &sc) { 928 lldb::TargetSP target_sp = sc.target_sp; 929 930 for (const SearchSpec &spec : specs) { 931 lldb::addr_t symbol_load_addr = target_sp->GetPersistentSymbol(spec.name); 932 933 if (symbol_load_addr != LLDB_INVALID_ADDRESS) 934 return symbol_load_addr; 935 } 936 937 return LLDB_INVALID_ADDRESS; 938 } 939 940 lldb::addr_t 941 IRExecutionUnit::FindSymbol(lldb_private::ConstString name, bool &missing_weak) { 942 std::vector<SearchSpec> candidate_C_names; 943 std::vector<SearchSpec> candidate_CPlusPlus_names; 944 945 CollectCandidateCNames(candidate_C_names, name); 946 947 lldb::addr_t ret = FindInSymbols(candidate_C_names, m_sym_ctx, missing_weak); 948 if (ret != LLDB_INVALID_ADDRESS) 949 return ret; 950 951 // If we find the symbol in runtimes or user defined symbols it can't be 952 // a missing weak symbol. 953 missing_weak = false; 954 ret = FindInRuntimes(candidate_C_names, m_sym_ctx); 955 if (ret != LLDB_INVALID_ADDRESS) 956 return ret; 957 958 ret = FindInUserDefinedSymbols(candidate_C_names, m_sym_ctx); 959 if (ret != LLDB_INVALID_ADDRESS) 960 return ret; 961 962 CollectCandidateCPlusPlusNames(candidate_CPlusPlus_names, candidate_C_names, 963 m_sym_ctx); 964 ret = FindInSymbols(candidate_CPlusPlus_names, m_sym_ctx, missing_weak); 965 if (ret != LLDB_INVALID_ADDRESS) 966 return ret; 967 968 std::vector<SearchSpec> candidate_fallback_names; 969 970 CollectFallbackNames(candidate_fallback_names, candidate_C_names); 971 ret = FindInSymbols(candidate_fallback_names, m_sym_ctx, missing_weak); 972 973 return ret; 974 } 975 976 void IRExecutionUnit::GetStaticInitializers( 977 std::vector<lldb::addr_t> &static_initializers) { 978 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 979 980 llvm::GlobalVariable *global_ctors = 981 m_module->getNamedGlobal("llvm.global_ctors"); 982 if (!global_ctors) { 983 LLDB_LOG(log, "Couldn't find llvm.global_ctors."); 984 return; 985 } 986 auto *ctor_array = 987 llvm::dyn_cast<llvm::ConstantArray>(global_ctors->getInitializer()); 988 if (!ctor_array) { 989 LLDB_LOG(log, "llvm.global_ctors not a ConstantArray."); 990 return; 991 } 992 993 for (llvm::Use &ctor_use : ctor_array->operands()) { 994 auto *ctor_struct = llvm::dyn_cast<llvm::ConstantStruct>(ctor_use); 995 if (!ctor_struct) 996 continue; 997 // this is standardized 998 lldbassert(ctor_struct->getNumOperands() == 3); 999 auto *ctor_function = 1000 llvm::dyn_cast<llvm::Function>(ctor_struct->getOperand(1)); 1001 if (!ctor_function) { 1002 LLDB_LOG(log, "global_ctor doesn't contain an llvm::Function"); 1003 continue; 1004 } 1005 1006 ConstString ctor_function_name(ctor_function->getName().str()); 1007 LLDB_LOG(log, "Looking for callable jitted function with name {0}.", 1008 ctor_function_name); 1009 1010 for (JittedFunction &jitted_function : m_jitted_functions) { 1011 if (ctor_function_name != jitted_function.m_name) 1012 continue; 1013 if (jitted_function.m_remote_addr == LLDB_INVALID_ADDRESS) { 1014 LLDB_LOG(log, "Found jitted function with invalid address."); 1015 continue; 1016 } 1017 static_initializers.push_back(jitted_function.m_remote_addr); 1018 LLDB_LOG(log, "Calling function at address {0:x}.", 1019 jitted_function.m_remote_addr); 1020 break; 1021 } 1022 } 1023 } 1024 1025 llvm::JITSymbol 1026 IRExecutionUnit::MemoryManager::findSymbol(const std::string &Name) { 1027 bool missing_weak = false; 1028 uint64_t addr = GetSymbolAddressAndPresence(Name, missing_weak); 1029 // This is a weak symbol: 1030 if (missing_weak) 1031 return llvm::JITSymbol(addr, 1032 llvm::JITSymbolFlags::Exported | llvm::JITSymbolFlags::Weak); 1033 else 1034 return llvm::JITSymbol(addr, llvm::JITSymbolFlags::Exported); 1035 } 1036 1037 uint64_t 1038 IRExecutionUnit::MemoryManager::getSymbolAddress(const std::string &Name) { 1039 bool missing_weak = false; 1040 return GetSymbolAddressAndPresence(Name, missing_weak); 1041 } 1042 1043 uint64_t 1044 IRExecutionUnit::MemoryManager::GetSymbolAddressAndPresence( 1045 const std::string &Name, bool &missing_weak) { 1046 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1047 1048 ConstString name_cs(Name.c_str()); 1049 1050 lldb::addr_t ret = m_parent.FindSymbol(name_cs, missing_weak); 1051 1052 if (ret == LLDB_INVALID_ADDRESS) { 1053 LLDB_LOGF(log, 1054 "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = <not found>", 1055 Name.c_str()); 1056 1057 m_parent.ReportSymbolLookupError(name_cs); 1058 return 0; 1059 } else { 1060 LLDB_LOGF(log, "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = %" PRIx64, 1061 Name.c_str(), ret); 1062 return ret; 1063 } 1064 } 1065 1066 void *IRExecutionUnit::MemoryManager::getPointerToNamedFunction( 1067 const std::string &Name, bool AbortOnFailure) { 1068 return (void *)getSymbolAddress(Name); 1069 } 1070 1071 lldb::addr_t 1072 IRExecutionUnit::GetRemoteAddressForLocal(lldb::addr_t local_address) { 1073 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1074 1075 for (AllocationRecord &record : m_records) { 1076 if (local_address >= record.m_host_address && 1077 local_address < record.m_host_address + record.m_size) { 1078 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1079 return LLDB_INVALID_ADDRESS; 1080 1081 lldb::addr_t ret = 1082 record.m_process_address + (local_address - record.m_host_address); 1083 1084 LLDB_LOGF(log, 1085 "IRExecutionUnit::GetRemoteAddressForLocal() found 0x%" PRIx64 1086 " in [0x%" PRIx64 "..0x%" PRIx64 "], and returned 0x%" PRIx64 1087 " from [0x%" PRIx64 "..0x%" PRIx64 "].", 1088 local_address, (uint64_t)record.m_host_address, 1089 (uint64_t)record.m_host_address + (uint64_t)record.m_size, ret, 1090 record.m_process_address, 1091 record.m_process_address + record.m_size); 1092 1093 return ret; 1094 } 1095 } 1096 1097 return LLDB_INVALID_ADDRESS; 1098 } 1099 1100 IRExecutionUnit::AddrRange 1101 IRExecutionUnit::GetRemoteRangeForLocal(lldb::addr_t local_address) { 1102 for (AllocationRecord &record : m_records) { 1103 if (local_address >= record.m_host_address && 1104 local_address < record.m_host_address + record.m_size) { 1105 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1106 return AddrRange(0, 0); 1107 1108 return AddrRange(record.m_process_address, record.m_size); 1109 } 1110 } 1111 1112 return AddrRange(0, 0); 1113 } 1114 1115 bool IRExecutionUnit::CommitOneAllocation(lldb::ProcessSP &process_sp, 1116 Status &error, 1117 AllocationRecord &record) { 1118 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1119 return true; 1120 } 1121 1122 switch (record.m_sect_type) { 1123 case lldb::eSectionTypeInvalid: 1124 case lldb::eSectionTypeDWARFDebugAbbrev: 1125 case lldb::eSectionTypeDWARFDebugAddr: 1126 case lldb::eSectionTypeDWARFDebugAranges: 1127 case lldb::eSectionTypeDWARFDebugCuIndex: 1128 case lldb::eSectionTypeDWARFDebugFrame: 1129 case lldb::eSectionTypeDWARFDebugInfo: 1130 case lldb::eSectionTypeDWARFDebugLine: 1131 case lldb::eSectionTypeDWARFDebugLoc: 1132 case lldb::eSectionTypeDWARFDebugLocLists: 1133 case lldb::eSectionTypeDWARFDebugMacInfo: 1134 case lldb::eSectionTypeDWARFDebugPubNames: 1135 case lldb::eSectionTypeDWARFDebugPubTypes: 1136 case lldb::eSectionTypeDWARFDebugRanges: 1137 case lldb::eSectionTypeDWARFDebugStr: 1138 case lldb::eSectionTypeDWARFDebugStrOffsets: 1139 case lldb::eSectionTypeDWARFAppleNames: 1140 case lldb::eSectionTypeDWARFAppleTypes: 1141 case lldb::eSectionTypeDWARFAppleNamespaces: 1142 case lldb::eSectionTypeDWARFAppleObjC: 1143 case lldb::eSectionTypeDWARFGNUDebugAltLink: 1144 error.Clear(); 1145 break; 1146 default: 1147 const bool zero_memory = false; 1148 record.m_process_address = 1149 Malloc(record.m_size, record.m_alignment, record.m_permissions, 1150 eAllocationPolicyProcessOnly, zero_memory, error); 1151 break; 1152 } 1153 1154 return error.Success(); 1155 } 1156 1157 bool IRExecutionUnit::CommitAllocations(lldb::ProcessSP &process_sp) { 1158 bool ret = true; 1159 1160 lldb_private::Status err; 1161 1162 for (AllocationRecord &record : m_records) { 1163 ret = CommitOneAllocation(process_sp, err, record); 1164 1165 if (!ret) { 1166 break; 1167 } 1168 } 1169 1170 if (!ret) { 1171 for (AllocationRecord &record : m_records) { 1172 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1173 Free(record.m_process_address, err); 1174 record.m_process_address = LLDB_INVALID_ADDRESS; 1175 } 1176 } 1177 } 1178 1179 return ret; 1180 } 1181 1182 void IRExecutionUnit::ReportAllocations(llvm::ExecutionEngine &engine) { 1183 m_reported_allocations = true; 1184 1185 for (AllocationRecord &record : m_records) { 1186 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1187 continue; 1188 1189 if (record.m_section_id == eSectionIDInvalid) 1190 continue; 1191 1192 engine.mapSectionAddress((void *)record.m_host_address, 1193 record.m_process_address); 1194 } 1195 1196 // Trigger re-application of relocations. 1197 engine.finalizeObject(); 1198 } 1199 1200 bool IRExecutionUnit::WriteData(lldb::ProcessSP &process_sp) { 1201 bool wrote_something = false; 1202 for (AllocationRecord &record : m_records) { 1203 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1204 lldb_private::Status err; 1205 WriteMemory(record.m_process_address, (uint8_t *)record.m_host_address, 1206 record.m_size, err); 1207 if (err.Success()) 1208 wrote_something = true; 1209 } 1210 } 1211 return wrote_something; 1212 } 1213 1214 void IRExecutionUnit::AllocationRecord::dump(Log *log) { 1215 if (!log) 1216 return; 1217 1218 LLDB_LOGF(log, 1219 "[0x%llx+0x%llx]->0x%llx (alignment %d, section ID %d, name %s)", 1220 (unsigned long long)m_host_address, (unsigned long long)m_size, 1221 (unsigned long long)m_process_address, (unsigned)m_alignment, 1222 (unsigned)m_section_id, m_name.c_str()); 1223 } 1224 1225 lldb::ByteOrder IRExecutionUnit::GetByteOrder() const { 1226 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1227 return exe_ctx.GetByteOrder(); 1228 } 1229 1230 uint32_t IRExecutionUnit::GetAddressByteSize() const { 1231 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1232 return exe_ctx.GetAddressByteSize(); 1233 } 1234 1235 void IRExecutionUnit::PopulateSymtab(lldb_private::ObjectFile *obj_file, 1236 lldb_private::Symtab &symtab) { 1237 // No symbols yet... 1238 } 1239 1240 void IRExecutionUnit::PopulateSectionList( 1241 lldb_private::ObjectFile *obj_file, 1242 lldb_private::SectionList §ion_list) { 1243 for (AllocationRecord &record : m_records) { 1244 if (record.m_size > 0) { 1245 lldb::SectionSP section_sp(new lldb_private::Section( 1246 obj_file->GetModule(), obj_file, record.m_section_id, 1247 ConstString(record.m_name), record.m_sect_type, 1248 record.m_process_address, record.m_size, 1249 record.m_host_address, // file_offset (which is the host address for 1250 // the data) 1251 record.m_size, // file_size 1252 0, 1253 record.m_permissions)); // flags 1254 section_list.AddSection(section_sp); 1255 } 1256 } 1257 } 1258 1259 ArchSpec IRExecutionUnit::GetArchitecture() { 1260 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1261 if(Target *target = exe_ctx.GetTargetPtr()) 1262 return target->GetArchitecture(); 1263 return ArchSpec(); 1264 } 1265 1266 lldb::ModuleSP IRExecutionUnit::GetJITModule() { 1267 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1268 Target *target = exe_ctx.GetTargetPtr(); 1269 if (!target) 1270 return nullptr; 1271 1272 auto Delegate = std::static_pointer_cast<lldb_private::ObjectFileJITDelegate>( 1273 shared_from_this()); 1274 1275 lldb::ModuleSP jit_module_sp = 1276 lldb_private::Module::CreateModuleFromObjectFile<ObjectFileJIT>(Delegate); 1277 if (!jit_module_sp) 1278 return nullptr; 1279 1280 bool changed = false; 1281 jit_module_sp->SetLoadAddress(*target, 0, true, changed); 1282 return jit_module_sp; 1283 } 1284