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/DiagnosticHandler.h" 13 #include "llvm/IR/DiagnosticInfo.h" 14 #include "llvm/IR/LLVMContext.h" 15 #include "llvm/IR/Module.h" 16 #include "llvm/Support/SourceMgr.h" 17 #include "llvm/Support/raw_ostream.h" 18 19 #include "lldb/Core/Debugger.h" 20 #include "lldb/Core/Disassembler.h" 21 #include "lldb/Core/Module.h" 22 #include "lldb/Core/Section.h" 23 #include "lldb/Expression/IRExecutionUnit.h" 24 #include "lldb/Symbol/CompileUnit.h" 25 #include "lldb/Symbol/SymbolContext.h" 26 #include "lldb/Symbol/SymbolFile.h" 27 #include "lldb/Symbol/SymbolVendor.h" 28 #include "lldb/Target/ExecutionContext.h" 29 #include "lldb/Target/LanguageRuntime.h" 30 #include "lldb/Target/Target.h" 31 #include "lldb/Utility/DataBufferHeap.h" 32 #include "lldb/Utility/DataExtractor.h" 33 #include "lldb/Utility/LLDBAssert.h" 34 #include "lldb/Utility/Log.h" 35 36 #include "lldb/../../source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h" 37 #include "lldb/../../source/Plugins/ObjectFile/JIT/ObjectFileJIT.h" 38 39 using namespace lldb_private; 40 41 IRExecutionUnit::IRExecutionUnit(std::unique_ptr<llvm::LLVMContext> &context_up, 42 std::unique_ptr<llvm::Module> &module_up, 43 ConstString &name, 44 const lldb::TargetSP &target_sp, 45 const SymbolContext &sym_ctx, 46 std::vector<std::string> &cpu_features) 47 : IRMemoryMap(target_sp), m_context_up(context_up.release()), 48 m_module_up(module_up.release()), m_module(m_module_up.get()), 49 m_cpu_features(cpu_features), m_name(name), m_sym_ctx(sym_ctx), 50 m_did_jit(false), m_function_load_addr(LLDB_INVALID_ADDRESS), 51 m_function_end_load_addr(LLDB_INVALID_ADDRESS), 52 m_reported_allocations(false) {} 53 54 lldb::addr_t IRExecutionUnit::WriteNow(const uint8_t *bytes, size_t size, 55 Status &error) { 56 const bool zero_memory = false; 57 lldb::addr_t allocation_process_addr = 58 Malloc(size, 8, lldb::ePermissionsWritable | lldb::ePermissionsReadable, 59 eAllocationPolicyMirror, zero_memory, error); 60 61 if (!error.Success()) 62 return LLDB_INVALID_ADDRESS; 63 64 WriteMemory(allocation_process_addr, bytes, size, error); 65 66 if (!error.Success()) { 67 Status err; 68 Free(allocation_process_addr, err); 69 70 return LLDB_INVALID_ADDRESS; 71 } 72 73 if (Log *log = 74 lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)) { 75 DataBufferHeap my_buffer(size, 0); 76 Status err; 77 ReadMemory(my_buffer.GetBytes(), allocation_process_addr, size, err); 78 79 if (err.Success()) { 80 DataExtractor my_extractor(my_buffer.GetBytes(), my_buffer.GetByteSize(), 81 lldb::eByteOrderBig, 8); 82 my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(), 83 allocation_process_addr, 16, 84 DataExtractor::TypeUInt8); 85 } 86 } 87 88 return allocation_process_addr; 89 } 90 91 void IRExecutionUnit::FreeNow(lldb::addr_t allocation) { 92 if (allocation == LLDB_INVALID_ADDRESS) 93 return; 94 95 Status err; 96 97 Free(allocation, err); 98 } 99 100 Status IRExecutionUnit::DisassembleFunction(Stream &stream, 101 lldb::ProcessSP &process_wp) { 102 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 103 104 ExecutionContext exe_ctx(process_wp); 105 106 Status ret; 107 108 ret.Clear(); 109 110 lldb::addr_t func_local_addr = LLDB_INVALID_ADDRESS; 111 lldb::addr_t func_remote_addr = LLDB_INVALID_ADDRESS; 112 113 for (JittedFunction &function : m_jitted_functions) { 114 if (function.m_name == m_name) { 115 func_local_addr = function.m_local_addr; 116 func_remote_addr = function.m_remote_addr; 117 } 118 } 119 120 if (func_local_addr == LLDB_INVALID_ADDRESS) { 121 ret.SetErrorToGenericError(); 122 ret.SetErrorStringWithFormat("Couldn't find function %s for disassembly", 123 m_name.AsCString()); 124 return ret; 125 } 126 127 LLDB_LOGF(log, 128 "Found function, has local address 0x%" PRIx64 129 " and remote address 0x%" PRIx64, 130 (uint64_t)func_local_addr, (uint64_t)func_remote_addr); 131 132 std::pair<lldb::addr_t, lldb::addr_t> func_range; 133 134 func_range = GetRemoteRangeForLocal(func_local_addr); 135 136 if (func_range.first == 0 && func_range.second == 0) { 137 ret.SetErrorToGenericError(); 138 ret.SetErrorStringWithFormat("Couldn't find code range for function %s", 139 m_name.AsCString()); 140 return ret; 141 } 142 143 LLDB_LOGF(log, "Function's code range is [0x%" PRIx64 "+0x%" PRIx64 "]", 144 func_range.first, func_range.second); 145 146 Target *target = exe_ctx.GetTargetPtr(); 147 if (!target) { 148 ret.SetErrorToGenericError(); 149 ret.SetErrorString("Couldn't find the target"); 150 return ret; 151 } 152 153 lldb::DataBufferSP buffer_sp(new DataBufferHeap(func_range.second, 0)); 154 155 Process *process = exe_ctx.GetProcessPtr(); 156 Status err; 157 process->ReadMemory(func_remote_addr, buffer_sp->GetBytes(), 158 buffer_sp->GetByteSize(), err); 159 160 if (!err.Success()) { 161 ret.SetErrorToGenericError(); 162 ret.SetErrorStringWithFormat("Couldn't read from process: %s", 163 err.AsCString("unknown error")); 164 return ret; 165 } 166 167 ArchSpec arch(target->GetArchitecture()); 168 169 const char *plugin_name = nullptr; 170 const char *flavor_string = nullptr; 171 lldb::DisassemblerSP disassembler_sp = 172 Disassembler::FindPlugin(arch, flavor_string, plugin_name); 173 174 if (!disassembler_sp) { 175 ret.SetErrorToGenericError(); 176 ret.SetErrorStringWithFormat( 177 "Unable to find disassembler plug-in for %s architecture.", 178 arch.GetArchitectureName()); 179 return ret; 180 } 181 182 if (!process) { 183 ret.SetErrorToGenericError(); 184 ret.SetErrorString("Couldn't find the process"); 185 return ret; 186 } 187 188 DataExtractor extractor(buffer_sp, process->GetByteOrder(), 189 target->GetArchitecture().GetAddressByteSize()); 190 191 if (log) { 192 LLDB_LOGF(log, "Function data has contents:"); 193 extractor.PutToLog(log, 0, extractor.GetByteSize(), func_remote_addr, 16, 194 DataExtractor::TypeUInt8); 195 } 196 197 disassembler_sp->DecodeInstructions(Address(func_remote_addr), extractor, 0, 198 UINT32_MAX, false, false); 199 200 InstructionList &instruction_list = disassembler_sp->GetInstructionList(); 201 instruction_list.Dump(&stream, true, true, &exe_ctx); 202 return ret; 203 } 204 205 namespace { 206 struct IRExecDiagnosticHandler : public llvm::DiagnosticHandler { 207 Status *err; 208 IRExecDiagnosticHandler(Status *err) : err(err) {} 209 bool handleDiagnostics(const llvm::DiagnosticInfo &DI) override { 210 if (DI.getKind() == llvm::DK_SrcMgr) { 211 const auto &DISM = llvm::cast<llvm::DiagnosticInfoSrcMgr>(DI); 212 if (err && err->Success()) { 213 err->SetErrorToGenericError(); 214 err->SetErrorStringWithFormat( 215 "Inline assembly error: %s", 216 DISM.getSMDiag().getMessage().str().c_str()); 217 } 218 return true; 219 } 220 221 return false; 222 } 223 }; 224 } // namespace 225 226 void IRExecutionUnit::ReportSymbolLookupError(ConstString name) { 227 m_failed_lookups.push_back(name); 228 } 229 230 void IRExecutionUnit::GetRunnableInfo(Status &error, lldb::addr_t &func_addr, 231 lldb::addr_t &func_end) { 232 lldb::ProcessSP process_sp(GetProcessWP().lock()); 233 234 static std::recursive_mutex s_runnable_info_mutex; 235 236 func_addr = LLDB_INVALID_ADDRESS; 237 func_end = LLDB_INVALID_ADDRESS; 238 239 if (!process_sp) { 240 error.SetErrorToGenericError(); 241 error.SetErrorString("Couldn't write the JIT compiled code into the " 242 "process because the process is invalid"); 243 return; 244 } 245 246 if (m_did_jit) { 247 func_addr = m_function_load_addr; 248 func_end = m_function_end_load_addr; 249 250 return; 251 }; 252 253 std::lock_guard<std::recursive_mutex> guard(s_runnable_info_mutex); 254 255 m_did_jit = true; 256 257 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 258 259 std::string error_string; 260 261 if (log) { 262 std::string s; 263 llvm::raw_string_ostream oss(s); 264 265 m_module->print(oss, nullptr); 266 267 oss.flush(); 268 269 LLDB_LOGF(log, "Module being sent to JIT: \n%s", s.c_str()); 270 } 271 272 m_module_up->getContext().setDiagnosticHandler( 273 std::make_unique<IRExecDiagnosticHandler>(&error)); 274 275 llvm::EngineBuilder builder(std::move(m_module_up)); 276 llvm::Triple triple(m_module->getTargetTriple()); 277 278 builder.setEngineKind(llvm::EngineKind::JIT) 279 .setErrorStr(&error_string) 280 .setRelocationModel(triple.isOSBinFormatMachO() ? llvm::Reloc::PIC_ 281 : llvm::Reloc::Static) 282 .setMCJITMemoryManager(std::make_unique<MemoryManager>(*this)) 283 .setOptLevel(llvm::CodeGenOpt::Less); 284 285 llvm::StringRef mArch; 286 llvm::StringRef mCPU; 287 llvm::SmallVector<std::string, 0> mAttrs; 288 289 for (std::string &feature : m_cpu_features) 290 mAttrs.push_back(feature); 291 292 llvm::TargetMachine *target_machine = 293 builder.selectTarget(triple, mArch, mCPU, mAttrs); 294 295 m_execution_engine_up.reset(builder.create(target_machine)); 296 297 if (!m_execution_engine_up) { 298 error.SetErrorToGenericError(); 299 error.SetErrorStringWithFormat("Couldn't JIT the function: %s", 300 error_string.c_str()); 301 return; 302 } 303 304 m_strip_underscore = 305 (m_execution_engine_up->getDataLayout().getGlobalPrefix() == '_'); 306 307 class ObjectDumper : public llvm::ObjectCache { 308 public: 309 void notifyObjectCompiled(const llvm::Module *module, 310 llvm::MemoryBufferRef object) override { 311 int fd = 0; 312 llvm::SmallVector<char, 256> result_path; 313 std::string object_name_model = 314 "jit-object-" + module->getModuleIdentifier() + "-%%%.o"; 315 (void)llvm::sys::fs::createUniqueFile(object_name_model, fd, result_path); 316 llvm::raw_fd_ostream fds(fd, true); 317 fds.write(object.getBufferStart(), object.getBufferSize()); 318 } 319 320 std::unique_ptr<llvm::MemoryBuffer> 321 getObject(const llvm::Module *module) override { 322 // Return nothing - we're just abusing the object-cache mechanism to dump 323 // objects. 324 return nullptr; 325 } 326 }; 327 328 if (process_sp->GetTarget().GetEnableSaveObjects()) { 329 m_object_cache_up = std::make_unique<ObjectDumper>(); 330 m_execution_engine_up->setObjectCache(m_object_cache_up.get()); 331 } 332 333 // Make sure we see all sections, including ones that don't have 334 // relocations... 335 m_execution_engine_up->setProcessAllSections(true); 336 337 m_execution_engine_up->DisableLazyCompilation(); 338 339 for (llvm::Function &function : *m_module) { 340 if (function.isDeclaration() || function.hasPrivateLinkage()) 341 continue; 342 343 const bool external = !function.hasLocalLinkage(); 344 345 void *fun_ptr = m_execution_engine_up->getPointerToFunction(&function); 346 347 if (!error.Success()) { 348 // We got an error through our callback! 349 return; 350 } 351 352 if (!fun_ptr) { 353 error.SetErrorToGenericError(); 354 error.SetErrorStringWithFormat( 355 "'%s' was in the JITted module but wasn't lowered", 356 function.getName().str().c_str()); 357 return; 358 } 359 m_jitted_functions.push_back(JittedFunction( 360 function.getName().str().c_str(), external, reinterpret_cast<uintptr_t>(fun_ptr))); 361 } 362 363 CommitAllocations(process_sp); 364 ReportAllocations(*m_execution_engine_up); 365 366 // We have to do this after calling ReportAllocations because for the MCJIT, 367 // getGlobalValueAddress will cause the JIT to perform all relocations. That 368 // can only be done once, and has to happen after we do the remapping from 369 // local -> remote. That means we don't know the local address of the 370 // Variables, but we don't need that for anything, so that's okay. 371 372 std::function<void(llvm::GlobalValue &)> RegisterOneValue = [this]( 373 llvm::GlobalValue &val) { 374 if (val.hasExternalLinkage() && !val.isDeclaration()) { 375 uint64_t var_ptr_addr = 376 m_execution_engine_up->getGlobalValueAddress(val.getName().str()); 377 378 lldb::addr_t remote_addr = GetRemoteAddressForLocal(var_ptr_addr); 379 380 // This is a really unfortunae API that sometimes returns local addresses 381 // and sometimes returns remote addresses, based on whether the variable 382 // was relocated during ReportAllocations or not. 383 384 if (remote_addr == LLDB_INVALID_ADDRESS) { 385 remote_addr = var_ptr_addr; 386 } 387 388 if (var_ptr_addr != 0) 389 m_jitted_global_variables.push_back(JittedGlobalVariable( 390 val.getName().str().c_str(), LLDB_INVALID_ADDRESS, remote_addr)); 391 } 392 }; 393 394 for (llvm::GlobalVariable &global_var : m_module->getGlobalList()) { 395 RegisterOneValue(global_var); 396 } 397 398 for (llvm::GlobalAlias &global_alias : m_module->getAliasList()) { 399 RegisterOneValue(global_alias); 400 } 401 402 WriteData(process_sp); 403 404 if (m_failed_lookups.size()) { 405 StreamString ss; 406 407 ss.PutCString("Couldn't lookup symbols:\n"); 408 409 bool emitNewLine = false; 410 411 for (ConstString failed_lookup : m_failed_lookups) { 412 if (emitNewLine) 413 ss.PutCString("\n"); 414 emitNewLine = true; 415 ss.PutCString(" "); 416 ss.PutCString(Mangled(failed_lookup).GetDemangledName().GetStringRef()); 417 } 418 419 m_failed_lookups.clear(); 420 421 error.SetErrorString(ss.GetString()); 422 423 return; 424 } 425 426 m_function_load_addr = LLDB_INVALID_ADDRESS; 427 m_function_end_load_addr = LLDB_INVALID_ADDRESS; 428 429 for (JittedFunction &jitted_function : m_jitted_functions) { 430 jitted_function.m_remote_addr = 431 GetRemoteAddressForLocal(jitted_function.m_local_addr); 432 433 if (!m_name.IsEmpty() && jitted_function.m_name == m_name) { 434 AddrRange func_range = 435 GetRemoteRangeForLocal(jitted_function.m_local_addr); 436 m_function_end_load_addr = func_range.first + func_range.second; 437 m_function_load_addr = jitted_function.m_remote_addr; 438 } 439 } 440 441 if (log) { 442 LLDB_LOGF(log, "Code can be run in the target."); 443 444 StreamString disassembly_stream; 445 446 Status err = DisassembleFunction(disassembly_stream, process_sp); 447 448 if (!err.Success()) { 449 LLDB_LOGF(log, "Couldn't disassemble function : %s", 450 err.AsCString("unknown error")); 451 } else { 452 LLDB_LOGF(log, "Function disassembly:\n%s", disassembly_stream.GetData()); 453 } 454 455 LLDB_LOGF(log, "Sections: "); 456 for (AllocationRecord &record : m_records) { 457 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 458 record.dump(log); 459 460 DataBufferHeap my_buffer(record.m_size, 0); 461 Status err; 462 ReadMemory(my_buffer.GetBytes(), record.m_process_address, 463 record.m_size, err); 464 465 if (err.Success()) { 466 DataExtractor my_extractor(my_buffer.GetBytes(), 467 my_buffer.GetByteSize(), 468 lldb::eByteOrderBig, 8); 469 my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(), 470 record.m_process_address, 16, 471 DataExtractor::TypeUInt8); 472 } 473 } else { 474 record.dump(log); 475 476 DataExtractor my_extractor((const void *)record.m_host_address, 477 record.m_size, lldb::eByteOrderBig, 8); 478 my_extractor.PutToLog(log, 0, record.m_size, record.m_host_address, 16, 479 DataExtractor::TypeUInt8); 480 } 481 } 482 } 483 484 func_addr = m_function_load_addr; 485 func_end = m_function_end_load_addr; 486 487 return; 488 } 489 490 IRExecutionUnit::~IRExecutionUnit() { 491 m_module_up.reset(); 492 m_execution_engine_up.reset(); 493 m_context_up.reset(); 494 } 495 496 IRExecutionUnit::MemoryManager::MemoryManager(IRExecutionUnit &parent) 497 : m_default_mm_up(new llvm::SectionMemoryManager()), m_parent(parent) {} 498 499 IRExecutionUnit::MemoryManager::~MemoryManager() = default; 500 501 lldb::SectionType IRExecutionUnit::GetSectionTypeFromSectionName( 502 const llvm::StringRef &name, IRExecutionUnit::AllocationKind alloc_kind) { 503 lldb::SectionType sect_type = lldb::eSectionTypeCode; 504 switch (alloc_kind) { 505 case AllocationKind::Stub: 506 sect_type = lldb::eSectionTypeCode; 507 break; 508 case AllocationKind::Code: 509 sect_type = lldb::eSectionTypeCode; 510 break; 511 case AllocationKind::Data: 512 sect_type = lldb::eSectionTypeData; 513 break; 514 case AllocationKind::Global: 515 sect_type = lldb::eSectionTypeData; 516 break; 517 case AllocationKind::Bytes: 518 sect_type = lldb::eSectionTypeOther; 519 break; 520 } 521 522 if (!name.empty()) { 523 if (name.equals("__text") || name.equals(".text")) 524 sect_type = lldb::eSectionTypeCode; 525 else if (name.equals("__data") || name.equals(".data")) 526 sect_type = lldb::eSectionTypeCode; 527 else if (name.startswith("__debug_") || name.startswith(".debug_")) { 528 const uint32_t name_idx = name[0] == '_' ? 8 : 7; 529 llvm::StringRef dwarf_name(name.substr(name_idx)); 530 switch (dwarf_name[0]) { 531 case 'a': 532 if (dwarf_name.equals("abbrev")) 533 sect_type = lldb::eSectionTypeDWARFDebugAbbrev; 534 else if (dwarf_name.equals("aranges")) 535 sect_type = lldb::eSectionTypeDWARFDebugAranges; 536 else if (dwarf_name.equals("addr")) 537 sect_type = lldb::eSectionTypeDWARFDebugAddr; 538 break; 539 540 case 'f': 541 if (dwarf_name.equals("frame")) 542 sect_type = lldb::eSectionTypeDWARFDebugFrame; 543 break; 544 545 case 'i': 546 if (dwarf_name.equals("info")) 547 sect_type = lldb::eSectionTypeDWARFDebugInfo; 548 break; 549 550 case 'l': 551 if (dwarf_name.equals("line")) 552 sect_type = lldb::eSectionTypeDWARFDebugLine; 553 else if (dwarf_name.equals("loc")) 554 sect_type = lldb::eSectionTypeDWARFDebugLoc; 555 else if (dwarf_name.equals("loclists")) 556 sect_type = lldb::eSectionTypeDWARFDebugLocLists; 557 break; 558 559 case 'm': 560 if (dwarf_name.equals("macinfo")) 561 sect_type = lldb::eSectionTypeDWARFDebugMacInfo; 562 break; 563 564 case 'p': 565 if (dwarf_name.equals("pubnames")) 566 sect_type = lldb::eSectionTypeDWARFDebugPubNames; 567 else if (dwarf_name.equals("pubtypes")) 568 sect_type = lldb::eSectionTypeDWARFDebugPubTypes; 569 break; 570 571 case 's': 572 if (dwarf_name.equals("str")) 573 sect_type = lldb::eSectionTypeDWARFDebugStr; 574 else if (dwarf_name.equals("str_offsets")) 575 sect_type = lldb::eSectionTypeDWARFDebugStrOffsets; 576 break; 577 578 case 'r': 579 if (dwarf_name.equals("ranges")) 580 sect_type = lldb::eSectionTypeDWARFDebugRanges; 581 break; 582 583 default: 584 break; 585 } 586 } else if (name.startswith("__apple_") || name.startswith(".apple_")) 587 sect_type = lldb::eSectionTypeInvalid; 588 else if (name.equals("__objc_imageinfo")) 589 sect_type = lldb::eSectionTypeOther; 590 } 591 return sect_type; 592 } 593 594 uint8_t *IRExecutionUnit::MemoryManager::allocateCodeSection( 595 uintptr_t Size, unsigned Alignment, unsigned SectionID, 596 llvm::StringRef SectionName) { 597 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 598 599 uint8_t *return_value = m_default_mm_up->allocateCodeSection( 600 Size, Alignment, SectionID, SectionName); 601 602 m_parent.m_records.push_back(AllocationRecord( 603 (uintptr_t)return_value, 604 lldb::ePermissionsReadable | lldb::ePermissionsExecutable, 605 GetSectionTypeFromSectionName(SectionName, AllocationKind::Code), Size, 606 Alignment, SectionID, SectionName.str().c_str())); 607 608 LLDB_LOGF(log, 609 "IRExecutionUnit::allocateCodeSection(Size=0x%" PRIx64 610 ", Alignment=%u, SectionID=%u) = %p", 611 (uint64_t)Size, Alignment, SectionID, (void *)return_value); 612 613 if (m_parent.m_reported_allocations) { 614 Status err; 615 lldb::ProcessSP process_sp = 616 m_parent.GetBestExecutionContextScope()->CalculateProcess(); 617 618 m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back()); 619 } 620 621 return return_value; 622 } 623 624 uint8_t *IRExecutionUnit::MemoryManager::allocateDataSection( 625 uintptr_t Size, unsigned Alignment, unsigned SectionID, 626 llvm::StringRef SectionName, bool IsReadOnly) { 627 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 628 629 uint8_t *return_value = m_default_mm_up->allocateDataSection( 630 Size, Alignment, SectionID, SectionName, IsReadOnly); 631 632 uint32_t permissions = lldb::ePermissionsReadable; 633 if (!IsReadOnly) 634 permissions |= lldb::ePermissionsWritable; 635 m_parent.m_records.push_back(AllocationRecord( 636 (uintptr_t)return_value, permissions, 637 GetSectionTypeFromSectionName(SectionName, AllocationKind::Data), Size, 638 Alignment, SectionID, SectionName.str().c_str())); 639 LLDB_LOGF(log, 640 "IRExecutionUnit::allocateDataSection(Size=0x%" PRIx64 641 ", Alignment=%u, SectionID=%u) = %p", 642 (uint64_t)Size, Alignment, SectionID, (void *)return_value); 643 644 if (m_parent.m_reported_allocations) { 645 Status err; 646 lldb::ProcessSP process_sp = 647 m_parent.GetBestExecutionContextScope()->CalculateProcess(); 648 649 m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back()); 650 } 651 652 return return_value; 653 } 654 655 static ConstString FindBestAlternateMangledName(ConstString demangled, 656 const SymbolContext &sym_ctx) { 657 CPlusPlusLanguage::MethodName cpp_name(demangled); 658 std::string scope_qualified_name = cpp_name.GetScopeQualifiedName(); 659 660 if (!scope_qualified_name.size()) 661 return ConstString(); 662 663 if (!sym_ctx.module_sp) 664 return ConstString(); 665 666 lldb_private::SymbolFile *sym_file = sym_ctx.module_sp->GetSymbolFile(); 667 if (!sym_file) 668 return ConstString(); 669 670 std::vector<ConstString> alternates; 671 sym_file->GetMangledNamesForFunction(scope_qualified_name, alternates); 672 673 std::vector<ConstString> param_and_qual_matches; 674 std::vector<ConstString> param_matches; 675 for (size_t i = 0; i < alternates.size(); i++) { 676 ConstString alternate_mangled_name = alternates[i]; 677 Mangled mangled(alternate_mangled_name); 678 ConstString demangled = mangled.GetDemangledName(); 679 680 CPlusPlusLanguage::MethodName alternate_cpp_name(demangled); 681 if (!cpp_name.IsValid()) 682 continue; 683 684 if (alternate_cpp_name.GetArguments() == cpp_name.GetArguments()) { 685 if (alternate_cpp_name.GetQualifiers() == cpp_name.GetQualifiers()) 686 param_and_qual_matches.push_back(alternate_mangled_name); 687 else 688 param_matches.push_back(alternate_mangled_name); 689 } 690 } 691 692 if (param_and_qual_matches.size()) 693 return param_and_qual_matches[0]; // It is assumed that there will be only 694 // one! 695 else if (param_matches.size()) 696 return param_matches[0]; // Return one of them as a best match 697 else 698 return ConstString(); 699 } 700 701 struct IRExecutionUnit::SearchSpec { 702 ConstString name; 703 lldb::FunctionNameType mask; 704 705 SearchSpec(ConstString n, 706 lldb::FunctionNameType m = lldb::eFunctionNameTypeFull) 707 : name(n), mask(m) {} 708 }; 709 710 void IRExecutionUnit::CollectCandidateCNames( 711 std::vector<IRExecutionUnit::SearchSpec> &C_specs, 712 ConstString name) { 713 if (m_strip_underscore && name.AsCString()[0] == '_') 714 C_specs.insert(C_specs.begin(), ConstString(&name.AsCString()[1])); 715 C_specs.push_back(SearchSpec(name)); 716 } 717 718 void IRExecutionUnit::CollectCandidateCPlusPlusNames( 719 std::vector<IRExecutionUnit::SearchSpec> &CPP_specs, 720 const std::vector<SearchSpec> &C_specs, const SymbolContext &sc) { 721 for (const SearchSpec &C_spec : C_specs) { 722 ConstString name = C_spec.name; 723 724 if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) { 725 Mangled mangled(name); 726 ConstString demangled = mangled.GetDemangledName(); 727 728 if (demangled) { 729 ConstString best_alternate_mangled_name = 730 FindBestAlternateMangledName(demangled, sc); 731 732 if (best_alternate_mangled_name) { 733 CPP_specs.push_back(best_alternate_mangled_name); 734 } 735 } 736 } 737 738 std::set<ConstString> alternates; 739 CPlusPlusLanguage::FindAlternateFunctionManglings(name, alternates); 740 CPP_specs.insert(CPP_specs.end(), alternates.begin(), alternates.end()); 741 } 742 } 743 744 void IRExecutionUnit::CollectFallbackNames( 745 std::vector<SearchSpec> &fallback_specs, 746 const std::vector<SearchSpec> &C_specs) { 747 // As a last-ditch fallback, try the base name for C++ names. It's terrible, 748 // but the DWARF doesn't always encode "extern C" correctly. 749 750 for (const SearchSpec &C_spec : C_specs) { 751 ConstString name = C_spec.name; 752 753 if (!CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) 754 continue; 755 756 Mangled mangled_name(name); 757 ConstString demangled_name = mangled_name.GetDemangledName(); 758 if (demangled_name.IsEmpty()) 759 continue; 760 761 const char *demangled_cstr = demangled_name.AsCString(); 762 const char *lparen_loc = strchr(demangled_cstr, '('); 763 if (!lparen_loc) 764 continue; 765 766 llvm::StringRef base_name(demangled_cstr, 767 lparen_loc - demangled_cstr); 768 fallback_specs.push_back(ConstString(base_name)); 769 } 770 } 771 772 lldb::addr_t IRExecutionUnit::FindInSymbols( 773 const std::vector<IRExecutionUnit::SearchSpec> &specs, 774 const lldb_private::SymbolContext &sc, 775 bool &symbol_was_missing_weak) { 776 symbol_was_missing_weak = false; 777 Target *target = sc.target_sp.get(); 778 779 if (!target) { 780 // we shouldn't be doing any symbol lookup at all without a target 781 return LLDB_INVALID_ADDRESS; 782 } 783 784 for (const SearchSpec &spec : specs) { 785 SymbolContextList sc_list; 786 787 lldb::addr_t best_internal_load_address = LLDB_INVALID_ADDRESS; 788 789 std::function<bool(lldb::addr_t &, SymbolContextList &, 790 const lldb_private::SymbolContext &)> 791 get_external_load_address = [&best_internal_load_address, target, 792 &symbol_was_missing_weak]( 793 lldb::addr_t &load_address, SymbolContextList &sc_list, 794 const lldb_private::SymbolContext &sc) -> lldb::addr_t { 795 load_address = LLDB_INVALID_ADDRESS; 796 797 if (sc_list.GetSize() == 0) 798 return false; 799 800 // missing_weak_symbol will be true only if we found only weak undefined 801 // references to this symbol. 802 symbol_was_missing_weak = true; 803 for (auto candidate_sc : sc_list.SymbolContexts()) { 804 // Only symbols can be weak undefined: 805 if (!candidate_sc.symbol) 806 symbol_was_missing_weak = false; 807 else if (candidate_sc.symbol->GetType() != lldb::eSymbolTypeUndefined 808 || !candidate_sc.symbol->IsWeak()) 809 symbol_was_missing_weak = false; 810 811 const bool is_external = 812 (candidate_sc.function) || 813 (candidate_sc.symbol && candidate_sc.symbol->IsExternal()); 814 if (candidate_sc.symbol) { 815 load_address = candidate_sc.symbol->ResolveCallableAddress(*target); 816 817 if (load_address == LLDB_INVALID_ADDRESS) { 818 if (target->GetProcessSP()) 819 load_address = 820 candidate_sc.symbol->GetAddress().GetLoadAddress(target); 821 else 822 load_address = candidate_sc.symbol->GetAddress().GetFileAddress(); 823 } 824 } 825 826 if (load_address == LLDB_INVALID_ADDRESS && candidate_sc.function) { 827 if (target->GetProcessSP()) 828 load_address = candidate_sc.function->GetAddressRange() 829 .GetBaseAddress() 830 .GetLoadAddress(target); 831 else 832 load_address = candidate_sc.function->GetAddressRange() 833 .GetBaseAddress() 834 .GetFileAddress(); 835 } 836 837 if (load_address != LLDB_INVALID_ADDRESS) { 838 if (is_external) { 839 return true; 840 } else if (best_internal_load_address == LLDB_INVALID_ADDRESS) { 841 best_internal_load_address = load_address; 842 load_address = LLDB_INVALID_ADDRESS; 843 } 844 } 845 } 846 847 // You test the address of a weak symbol against NULL to see if it is 848 // present. So we should return 0 for a missing weak symbol. 849 if (symbol_was_missing_weak) { 850 load_address = 0; 851 return true; 852 } 853 854 return false; 855 }; 856 857 if (sc.module_sp) { 858 sc.module_sp->FindFunctions(spec.name, CompilerDeclContext(), spec.mask, 859 true, // include_symbols 860 false, // include_inlines 861 sc_list); 862 } 863 864 lldb::addr_t load_address = LLDB_INVALID_ADDRESS; 865 866 if (get_external_load_address(load_address, sc_list, sc)) { 867 return load_address; 868 } else { 869 sc_list.Clear(); 870 } 871 872 if (sc_list.GetSize() == 0 && sc.target_sp) { 873 sc.target_sp->GetImages().FindFunctions(spec.name, spec.mask, 874 true, // include_symbols 875 false, // include_inlines 876 sc_list); 877 } 878 879 if (get_external_load_address(load_address, sc_list, sc)) { 880 return load_address; 881 } else { 882 sc_list.Clear(); 883 } 884 885 if (sc_list.GetSize() == 0 && sc.target_sp) { 886 sc.target_sp->GetImages().FindSymbolsWithNameAndType( 887 spec.name, lldb::eSymbolTypeAny, sc_list); 888 } 889 890 if (get_external_load_address(load_address, sc_list, sc)) { 891 return load_address; 892 } 893 // if there are any searches we try after this, add an sc_list.Clear() in 894 // an "else" clause here 895 896 if (best_internal_load_address != LLDB_INVALID_ADDRESS) { 897 return best_internal_load_address; 898 } 899 } 900 901 return LLDB_INVALID_ADDRESS; 902 } 903 904 lldb::addr_t 905 IRExecutionUnit::FindInRuntimes(const std::vector<SearchSpec> &specs, 906 const lldb_private::SymbolContext &sc) { 907 lldb::TargetSP target_sp = sc.target_sp; 908 909 if (!target_sp) { 910 return LLDB_INVALID_ADDRESS; 911 } 912 913 lldb::ProcessSP process_sp = sc.target_sp->GetProcessSP(); 914 915 if (!process_sp) { 916 return LLDB_INVALID_ADDRESS; 917 } 918 919 for (const SearchSpec &spec : specs) { 920 for (LanguageRuntime *runtime : process_sp->GetLanguageRuntimes()) { 921 lldb::addr_t symbol_load_addr = runtime->LookupRuntimeSymbol(spec.name); 922 923 if (symbol_load_addr != LLDB_INVALID_ADDRESS) 924 return symbol_load_addr; 925 } 926 } 927 928 return LLDB_INVALID_ADDRESS; 929 } 930 931 lldb::addr_t IRExecutionUnit::FindInUserDefinedSymbols( 932 const std::vector<SearchSpec> &specs, 933 const lldb_private::SymbolContext &sc) { 934 lldb::TargetSP target_sp = sc.target_sp; 935 936 for (const SearchSpec &spec : specs) { 937 lldb::addr_t symbol_load_addr = target_sp->GetPersistentSymbol(spec.name); 938 939 if (symbol_load_addr != LLDB_INVALID_ADDRESS) 940 return symbol_load_addr; 941 } 942 943 return LLDB_INVALID_ADDRESS; 944 } 945 946 lldb::addr_t 947 IRExecutionUnit::FindSymbol(lldb_private::ConstString name, bool &missing_weak) { 948 std::vector<SearchSpec> candidate_C_names; 949 std::vector<SearchSpec> candidate_CPlusPlus_names; 950 951 CollectCandidateCNames(candidate_C_names, name); 952 953 lldb::addr_t ret = FindInSymbols(candidate_C_names, m_sym_ctx, missing_weak); 954 if (ret != LLDB_INVALID_ADDRESS) 955 return ret; 956 957 // If we find the symbol in runtimes or user defined symbols it can't be 958 // a missing weak symbol. 959 missing_weak = false; 960 ret = FindInRuntimes(candidate_C_names, m_sym_ctx); 961 if (ret != LLDB_INVALID_ADDRESS) 962 return ret; 963 964 ret = FindInUserDefinedSymbols(candidate_C_names, m_sym_ctx); 965 if (ret != LLDB_INVALID_ADDRESS) 966 return ret; 967 968 CollectCandidateCPlusPlusNames(candidate_CPlusPlus_names, candidate_C_names, 969 m_sym_ctx); 970 ret = FindInSymbols(candidate_CPlusPlus_names, m_sym_ctx, missing_weak); 971 if (ret != LLDB_INVALID_ADDRESS) 972 return ret; 973 974 std::vector<SearchSpec> candidate_fallback_names; 975 976 CollectFallbackNames(candidate_fallback_names, candidate_C_names); 977 ret = FindInSymbols(candidate_fallback_names, m_sym_ctx, missing_weak); 978 979 return ret; 980 } 981 982 void IRExecutionUnit::GetStaticInitializers( 983 std::vector<lldb::addr_t> &static_initializers) { 984 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 985 986 llvm::GlobalVariable *global_ctors = 987 m_module->getNamedGlobal("llvm.global_ctors"); 988 if (!global_ctors) { 989 LLDB_LOG(log, "Couldn't find llvm.global_ctors."); 990 return; 991 } 992 auto *ctor_array = 993 llvm::dyn_cast<llvm::ConstantArray>(global_ctors->getInitializer()); 994 if (!ctor_array) { 995 LLDB_LOG(log, "llvm.global_ctors not a ConstantArray."); 996 return; 997 } 998 999 for (llvm::Use &ctor_use : ctor_array->operands()) { 1000 auto *ctor_struct = llvm::dyn_cast<llvm::ConstantStruct>(ctor_use); 1001 if (!ctor_struct) 1002 continue; 1003 // this is standardized 1004 lldbassert(ctor_struct->getNumOperands() == 3); 1005 auto *ctor_function = 1006 llvm::dyn_cast<llvm::Function>(ctor_struct->getOperand(1)); 1007 if (!ctor_function) { 1008 LLDB_LOG(log, "global_ctor doesn't contain an llvm::Function"); 1009 continue; 1010 } 1011 1012 ConstString ctor_function_name(ctor_function->getName().str()); 1013 LLDB_LOG(log, "Looking for callable jitted function with name {0}.", 1014 ctor_function_name); 1015 1016 for (JittedFunction &jitted_function : m_jitted_functions) { 1017 if (ctor_function_name != jitted_function.m_name) 1018 continue; 1019 if (jitted_function.m_remote_addr == LLDB_INVALID_ADDRESS) { 1020 LLDB_LOG(log, "Found jitted function with invalid address."); 1021 continue; 1022 } 1023 static_initializers.push_back(jitted_function.m_remote_addr); 1024 LLDB_LOG(log, "Calling function at address {0:x}.", 1025 jitted_function.m_remote_addr); 1026 break; 1027 } 1028 } 1029 } 1030 1031 llvm::JITSymbol 1032 IRExecutionUnit::MemoryManager::findSymbol(const std::string &Name) { 1033 bool missing_weak = false; 1034 uint64_t addr = GetSymbolAddressAndPresence(Name, missing_weak); 1035 // This is a weak symbol: 1036 if (missing_weak) 1037 return llvm::JITSymbol(addr, 1038 llvm::JITSymbolFlags::Exported | llvm::JITSymbolFlags::Weak); 1039 else 1040 return llvm::JITSymbol(addr, llvm::JITSymbolFlags::Exported); 1041 } 1042 1043 uint64_t 1044 IRExecutionUnit::MemoryManager::getSymbolAddress(const std::string &Name) { 1045 bool missing_weak = false; 1046 return GetSymbolAddressAndPresence(Name, missing_weak); 1047 } 1048 1049 uint64_t 1050 IRExecutionUnit::MemoryManager::GetSymbolAddressAndPresence( 1051 const std::string &Name, bool &missing_weak) { 1052 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1053 1054 ConstString name_cs(Name.c_str()); 1055 1056 lldb::addr_t ret = m_parent.FindSymbol(name_cs, missing_weak); 1057 1058 if (ret == LLDB_INVALID_ADDRESS) { 1059 LLDB_LOGF(log, 1060 "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = <not found>", 1061 Name.c_str()); 1062 1063 m_parent.ReportSymbolLookupError(name_cs); 1064 return 0; 1065 } else { 1066 LLDB_LOGF(log, "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = %" PRIx64, 1067 Name.c_str(), ret); 1068 return ret; 1069 } 1070 } 1071 1072 void *IRExecutionUnit::MemoryManager::getPointerToNamedFunction( 1073 const std::string &Name, bool AbortOnFailure) { 1074 return (void *)getSymbolAddress(Name); 1075 } 1076 1077 lldb::addr_t 1078 IRExecutionUnit::GetRemoteAddressForLocal(lldb::addr_t local_address) { 1079 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1080 1081 for (AllocationRecord &record : m_records) { 1082 if (local_address >= record.m_host_address && 1083 local_address < record.m_host_address + record.m_size) { 1084 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1085 return LLDB_INVALID_ADDRESS; 1086 1087 lldb::addr_t ret = 1088 record.m_process_address + (local_address - record.m_host_address); 1089 1090 LLDB_LOGF(log, 1091 "IRExecutionUnit::GetRemoteAddressForLocal() found 0x%" PRIx64 1092 " in [0x%" PRIx64 "..0x%" PRIx64 "], and returned 0x%" PRIx64 1093 " from [0x%" PRIx64 "..0x%" PRIx64 "].", 1094 local_address, (uint64_t)record.m_host_address, 1095 (uint64_t)record.m_host_address + (uint64_t)record.m_size, ret, 1096 record.m_process_address, 1097 record.m_process_address + record.m_size); 1098 1099 return ret; 1100 } 1101 } 1102 1103 return LLDB_INVALID_ADDRESS; 1104 } 1105 1106 IRExecutionUnit::AddrRange 1107 IRExecutionUnit::GetRemoteRangeForLocal(lldb::addr_t local_address) { 1108 for (AllocationRecord &record : m_records) { 1109 if (local_address >= record.m_host_address && 1110 local_address < record.m_host_address + record.m_size) { 1111 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1112 return AddrRange(0, 0); 1113 1114 return AddrRange(record.m_process_address, record.m_size); 1115 } 1116 } 1117 1118 return AddrRange(0, 0); 1119 } 1120 1121 bool IRExecutionUnit::CommitOneAllocation(lldb::ProcessSP &process_sp, 1122 Status &error, 1123 AllocationRecord &record) { 1124 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1125 return true; 1126 } 1127 1128 switch (record.m_sect_type) { 1129 case lldb::eSectionTypeInvalid: 1130 case lldb::eSectionTypeDWARFDebugAbbrev: 1131 case lldb::eSectionTypeDWARFDebugAddr: 1132 case lldb::eSectionTypeDWARFDebugAranges: 1133 case lldb::eSectionTypeDWARFDebugCuIndex: 1134 case lldb::eSectionTypeDWARFDebugFrame: 1135 case lldb::eSectionTypeDWARFDebugInfo: 1136 case lldb::eSectionTypeDWARFDebugLine: 1137 case lldb::eSectionTypeDWARFDebugLoc: 1138 case lldb::eSectionTypeDWARFDebugLocLists: 1139 case lldb::eSectionTypeDWARFDebugMacInfo: 1140 case lldb::eSectionTypeDWARFDebugPubNames: 1141 case lldb::eSectionTypeDWARFDebugPubTypes: 1142 case lldb::eSectionTypeDWARFDebugRanges: 1143 case lldb::eSectionTypeDWARFDebugStr: 1144 case lldb::eSectionTypeDWARFDebugStrOffsets: 1145 case lldb::eSectionTypeDWARFAppleNames: 1146 case lldb::eSectionTypeDWARFAppleTypes: 1147 case lldb::eSectionTypeDWARFAppleNamespaces: 1148 case lldb::eSectionTypeDWARFAppleObjC: 1149 case lldb::eSectionTypeDWARFGNUDebugAltLink: 1150 error.Clear(); 1151 break; 1152 default: 1153 const bool zero_memory = false; 1154 record.m_process_address = 1155 Malloc(record.m_size, record.m_alignment, record.m_permissions, 1156 eAllocationPolicyProcessOnly, zero_memory, error); 1157 break; 1158 } 1159 1160 return error.Success(); 1161 } 1162 1163 bool IRExecutionUnit::CommitAllocations(lldb::ProcessSP &process_sp) { 1164 bool ret = true; 1165 1166 lldb_private::Status err; 1167 1168 for (AllocationRecord &record : m_records) { 1169 ret = CommitOneAllocation(process_sp, err, record); 1170 1171 if (!ret) { 1172 break; 1173 } 1174 } 1175 1176 if (!ret) { 1177 for (AllocationRecord &record : m_records) { 1178 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1179 Free(record.m_process_address, err); 1180 record.m_process_address = LLDB_INVALID_ADDRESS; 1181 } 1182 } 1183 } 1184 1185 return ret; 1186 } 1187 1188 void IRExecutionUnit::ReportAllocations(llvm::ExecutionEngine &engine) { 1189 m_reported_allocations = true; 1190 1191 for (AllocationRecord &record : m_records) { 1192 if (record.m_process_address == LLDB_INVALID_ADDRESS) 1193 continue; 1194 1195 if (record.m_section_id == eSectionIDInvalid) 1196 continue; 1197 1198 engine.mapSectionAddress((void *)record.m_host_address, 1199 record.m_process_address); 1200 } 1201 1202 // Trigger re-application of relocations. 1203 engine.finalizeObject(); 1204 } 1205 1206 bool IRExecutionUnit::WriteData(lldb::ProcessSP &process_sp) { 1207 bool wrote_something = false; 1208 for (AllocationRecord &record : m_records) { 1209 if (record.m_process_address != LLDB_INVALID_ADDRESS) { 1210 lldb_private::Status err; 1211 WriteMemory(record.m_process_address, (uint8_t *)record.m_host_address, 1212 record.m_size, err); 1213 if (err.Success()) 1214 wrote_something = true; 1215 } 1216 } 1217 return wrote_something; 1218 } 1219 1220 void IRExecutionUnit::AllocationRecord::dump(Log *log) { 1221 if (!log) 1222 return; 1223 1224 LLDB_LOGF(log, 1225 "[0x%llx+0x%llx]->0x%llx (alignment %d, section ID %d, name %s)", 1226 (unsigned long long)m_host_address, (unsigned long long)m_size, 1227 (unsigned long long)m_process_address, (unsigned)m_alignment, 1228 (unsigned)m_section_id, m_name.c_str()); 1229 } 1230 1231 lldb::ByteOrder IRExecutionUnit::GetByteOrder() const { 1232 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1233 return exe_ctx.GetByteOrder(); 1234 } 1235 1236 uint32_t IRExecutionUnit::GetAddressByteSize() const { 1237 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1238 return exe_ctx.GetAddressByteSize(); 1239 } 1240 1241 void IRExecutionUnit::PopulateSymtab(lldb_private::ObjectFile *obj_file, 1242 lldb_private::Symtab &symtab) { 1243 // No symbols yet... 1244 } 1245 1246 void IRExecutionUnit::PopulateSectionList( 1247 lldb_private::ObjectFile *obj_file, 1248 lldb_private::SectionList §ion_list) { 1249 for (AllocationRecord &record : m_records) { 1250 if (record.m_size > 0) { 1251 lldb::SectionSP section_sp(new lldb_private::Section( 1252 obj_file->GetModule(), obj_file, record.m_section_id, 1253 ConstString(record.m_name), record.m_sect_type, 1254 record.m_process_address, record.m_size, 1255 record.m_host_address, // file_offset (which is the host address for 1256 // the data) 1257 record.m_size, // file_size 1258 0, 1259 record.m_permissions)); // flags 1260 section_list.AddSection(section_sp); 1261 } 1262 } 1263 } 1264 1265 ArchSpec IRExecutionUnit::GetArchitecture() { 1266 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1267 if(Target *target = exe_ctx.GetTargetPtr()) 1268 return target->GetArchitecture(); 1269 return ArchSpec(); 1270 } 1271 1272 lldb::ModuleSP IRExecutionUnit::GetJITModule() { 1273 ExecutionContext exe_ctx(GetBestExecutionContextScope()); 1274 Target *target = exe_ctx.GetTargetPtr(); 1275 if (!target) 1276 return nullptr; 1277 1278 auto Delegate = std::static_pointer_cast<lldb_private::ObjectFileJITDelegate>( 1279 shared_from_this()); 1280 1281 lldb::ModuleSP jit_module_sp = 1282 lldb_private::Module::CreateModuleFromObjectFile<ObjectFileJIT>(Delegate); 1283 if (!jit_module_sp) 1284 return nullptr; 1285 1286 bool changed = false; 1287 jit_module_sp->SetLoadAddress(*target, 0, true, changed); 1288 return jit_module_sp; 1289 } 1290