184 lines · cpp
1//===-- SymbolFileDWARFDwo.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-exception6//7//===----------------------------------------------------------------------===//8 9#include "SymbolFileDWARFDwo.h"10 11#include "lldb/Core/Section.h"12#include "lldb/Expression/DWARFExpression.h"13#include "lldb/Symbol/ObjectFile.h"14#include "lldb/Utility/LLDBAssert.h"15#include "llvm/Support/Casting.h"16 17#include "DWARFCompileUnit.h"18#include "DWARFDebugInfo.h"19#include "DWARFUnit.h"20#include <optional>21 22using namespace lldb;23using namespace lldb_private;24using namespace lldb_private::plugin::dwarf;25 26char SymbolFileDWARFDwo::ID;27 28SymbolFileDWARFDwo::SymbolFileDWARFDwo(SymbolFileDWARF &base_symbol_file,29 ObjectFileSP objfile, uint32_t id)30 : SymbolFileDWARF(objfile, objfile->GetSectionList(31 /*update_module_section_list*/ false)),32 m_base_symbol_file(base_symbol_file) {33 SetFileIndex(id);34 35 // Parsing of the dwarf unit index is not thread-safe, so we need to prime it36 // to enable subsequent concurrent lookups.37 m_context.GetAsLLVM().getCUIndex();38}39 40DWARFCompileUnit *SymbolFileDWARFDwo::GetDWOCompileUnitForHash(uint64_t hash) {41 if (const llvm::DWARFUnitIndex &index = m_context.GetAsLLVM().getCUIndex()) {42 if (const llvm::DWARFUnitIndex::Entry *entry = index.getFromHash(hash)) {43 if (auto *unit_contrib = entry->getContribution())44 return llvm::dyn_cast_or_null<DWARFCompileUnit>(45 DebugInfo().GetUnitAtOffset(DIERef::Section::DebugInfo,46 unit_contrib->getOffset()));47 }48 return nullptr;49 }50 51 DWARFCompileUnit *cu = FindSingleCompileUnit();52 if (!cu)53 return nullptr;54 std::optional<uint64_t> dwo_id = cu->GetDWOId();55 if (!dwo_id || hash != *dwo_id)56 return nullptr;57 return cu;58}59 60DWARFCompileUnit *SymbolFileDWARFDwo::FindSingleCompileUnit() {61 DWARFDebugInfo &debug_info = DebugInfo();62 63 // Right now we only support dwo files with one compile unit. If we don't have64 // type units, we can just check for the unit count.65 if (!debug_info.ContainsTypeUnits() && debug_info.GetNumUnits() == 1)66 return llvm::cast<DWARFCompileUnit>(debug_info.GetUnitAtIndex(0));67 68 // Otherwise, we have to run through all units, and find the compile unit that69 // way.70 DWARFCompileUnit *cu = nullptr;71 for (size_t i = 0; i < debug_info.GetNumUnits(); ++i) {72 if (auto *candidate =73 llvm::dyn_cast<DWARFCompileUnit>(debug_info.GetUnitAtIndex(i))) {74 if (cu)75 return nullptr; // More that one CU found.76 cu = candidate;77 }78 }79 return cu;80}81 82lldb::offset_t SymbolFileDWARFDwo::GetVendorDWARFOpcodeSize(83 const lldb_private::DataExtractor &data, const lldb::offset_t data_offset,84 const uint8_t op) const {85 return GetBaseSymbolFile().GetVendorDWARFOpcodeSize(data, data_offset, op);86}87 88uint64_t SymbolFileDWARFDwo::GetDebugInfoSize(bool load_all_debug_info) {89 // Directly get debug info from current dwo object file's section list90 // instead of asking SymbolFileCommon::GetDebugInfo() which parses from91 // owning module which is wrong.92 SectionList *section_list =93 m_objfile_sp->GetSectionList(/*update_module_section_list=*/false);94 if (section_list)95 return section_list->GetDebugInfoSize();96 return 0;97}98 99bool SymbolFileDWARFDwo::ParseVendorDWARFOpcode(100 uint8_t op, const DataExtractor &opcodes, lldb::offset_t &offset,101 RegisterContext *reg_ctx, lldb::RegisterKind reg_kind,102 std::vector<Value> &stack) const {103 return GetBaseSymbolFile().ParseVendorDWARFOpcode(op, opcodes, offset,104 reg_ctx, reg_kind, stack);105}106 107llvm::DenseMap<const DWARFDebugInfoEntry *, Type *> &108SymbolFileDWARFDwo::GetDIEToType() {109 return GetBaseSymbolFile().GetDIEToType();110}111 112SymbolFileDWARF::DIEToVariableSP &SymbolFileDWARFDwo::GetDIEToVariable() {113 return GetBaseSymbolFile().GetDIEToVariable();114}115 116llvm::DenseMap<lldb::opaque_compiler_type_t, DIERef> &117SymbolFileDWARFDwo::GetForwardDeclCompilerTypeToDIE() {118 return GetBaseSymbolFile().GetForwardDeclCompilerTypeToDIE();119}120 121void SymbolFileDWARFDwo::GetObjCMethods(122 lldb_private::ConstString class_name,123 llvm::function_ref<IterationAction(DWARFDIE die)> callback) {124 GetBaseSymbolFile().GetObjCMethods(class_name, callback);125}126 127UniqueDWARFASTTypeMap &SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap() {128 return GetBaseSymbolFile().GetUniqueDWARFASTTypeMap();129}130 131DWARFDIE SymbolFileDWARFDwo::FindDefinitionDIE(const DWARFDIE &die) {132 return GetBaseSymbolFile().FindDefinitionDIE(die);133}134 135lldb::TypeSP SymbolFileDWARFDwo::FindCompleteObjCDefinitionTypeForDIE(136 const DWARFDIE &die, lldb_private::ConstString type_name,137 bool must_be_implementation) {138 return GetBaseSymbolFile().FindCompleteObjCDefinitionTypeForDIE(139 die, type_name, must_be_implementation);140}141 142llvm::Expected<lldb::TypeSystemSP>143SymbolFileDWARFDwo::GetTypeSystemForLanguage(LanguageType language) {144 return GetBaseSymbolFile().GetTypeSystemForLanguage(language);145}146 147DWARFDIE148SymbolFileDWARFDwo::GetDIE(const DIERef &die_ref) {149 if (die_ref.file_index() == GetFileIndex())150 return DebugInfo().GetDIE(die_ref.section(), die_ref.die_offset());151 return GetBaseSymbolFile().GetDIE(die_ref);152}153 154void SymbolFileDWARFDwo::FindGlobalVariables(155 ConstString name, const CompilerDeclContext &parent_decl_ctx,156 uint32_t max_matches, VariableList &variables) {157 GetBaseSymbolFile().FindGlobalVariables(name, parent_decl_ctx, max_matches,158 variables);159}160 161bool SymbolFileDWARFDwo::GetDebugInfoIndexWasLoadedFromCache() const {162 return GetBaseSymbolFile().GetDebugInfoIndexWasLoadedFromCache();163}164void SymbolFileDWARFDwo::SetDebugInfoIndexWasLoadedFromCache() {165 GetBaseSymbolFile().SetDebugInfoIndexWasLoadedFromCache();166}167bool SymbolFileDWARFDwo::GetDebugInfoIndexWasSavedToCache() const {168 return GetBaseSymbolFile().GetDebugInfoIndexWasSavedToCache();169}170void SymbolFileDWARFDwo::SetDebugInfoIndexWasSavedToCache() {171 GetBaseSymbolFile().SetDebugInfoIndexWasSavedToCache();172}173bool SymbolFileDWARFDwo::GetDebugInfoHadFrameVariableErrors() const {174 return GetBaseSymbolFile().GetDebugInfoHadFrameVariableErrors();175}176void SymbolFileDWARFDwo::SetDebugInfoHadFrameVariableErrors() {177 return GetBaseSymbolFile().SetDebugInfoHadFrameVariableErrors();178}179 180SymbolFileDWARF *181SymbolFileDWARFDwo::GetDIERefSymbolFile(const DIERef &die_ref) {182 return GetBaseSymbolFile().GetDIERefSymbolFile(die_ref);183}184