15c8085202
This patch relands https://github.com/llvm/llvm-project/pull/71004 which was reverted because the clang change it depends on was reverted. In addition to the original patch, this PR includes a change to `SymbolFileDWARF::ParseVariableDIE` to support CU-level variable definitions that don't have locations, but represent a constant value. Previously, when debug-maps were available, we would assume that a variable with "static lifetime" (which in this case means "has a linkage name") has a valid address, which isn't the case for non-locationed constants. We could omit this additional change if we stopped attaching linkage names to global non-locationed constants. Original commit message: """ https://github.com/llvm/llvm-project/pull/71780 proposes moving the `DW_AT_const_value` on inline static members from the declaration DIE to the definition DIE. This patch makes sure the LLDB's expression evaluator can continue to support static initialisers even if the declaration doesn't have a `DW_AT_const_value` anymore. Previously the expression evaluator would find the constant for a VarDecl from its declaration `DW_TAG_member` DIE. In cases where the initialiser was specified out-of-class, LLDB could find it during symbol resolution. However, neither of those will work for constants, since we don't have a constant attribute on the declaration anymore and we don't have constants in the symbol table. """ Depends on: * https://github.com/llvm/llvm-project/pull/71780
559 lines
20 KiB
C++
559 lines
20 KiB
C++
//===-- SymbolFileDWARF.h --------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_SYMBOLFILEDWARF_H
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#define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_SYMBOLFILEDWARF_H
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#include <list>
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#include <map>
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#include <mutex>
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#include <optional>
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#include <unordered_map>
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#include <vector>
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/Support/Threading.h"
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#include "lldb/Core/UniqueCStringMap.h"
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#include "lldb/Core/dwarf.h"
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#include "lldb/Expression/DWARFExpressionList.h"
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#include "lldb/Symbol/DebugMacros.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Symbol/SymbolFile.h"
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#include "lldb/Target/Statistics.h"
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#include "lldb/Utility/ConstString.h"
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#include "lldb/Utility/Flags.h"
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#include "lldb/Utility/RangeMap.h"
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#include "lldb/Utility/StructuredData.h"
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#include "lldb/lldb-private.h"
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#include "DWARFContext.h"
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#include "DWARFDataExtractor.h"
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#include "DWARFDefines.h"
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#include "DWARFIndex.h"
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#include "UniqueDWARFASTType.h"
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class DWARFASTParserClang;
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namespace llvm {
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class DWARFDebugAbbrev;
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} // namespace llvm
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namespace lldb_private::plugin {
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namespace dwarf {
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// Forward Declarations for this DWARF plugin
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class DebugMapModule;
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class DWARFCompileUnit;
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class DWARFDebugAranges;
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class DWARFDebugInfo;
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class DWARFDebugInfoEntry;
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class DWARFDebugLine;
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class DWARFDebugRanges;
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class DWARFDeclContext;
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class DWARFFormValue;
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class DWARFTypeUnit;
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class SymbolFileDWARFDebugMap;
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class SymbolFileDWARFDwo;
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class SymbolFileDWARFDwp;
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#define DIE_IS_BEING_PARSED ((lldb_private::Type *)1)
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class SymbolFileDWARF : public SymbolFileCommon {
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/// LLVM RTTI support.
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static char ID;
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public:
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/// LLVM RTTI support.
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/// \{
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bool isA(const void *ClassID) const override {
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return ClassID == &ID || SymbolFileCommon::isA(ClassID);
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}
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static bool classof(const SymbolFile *obj) { return obj->isA(&ID); }
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/// \}
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friend class SymbolFileDWARFDebugMap;
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friend class SymbolFileDWARFDwo;
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friend class DebugMapModule;
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friend class DWARFCompileUnit;
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friend class DWARFDIE;
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friend class DWARFASTParser;
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// Static Functions
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static void Initialize();
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static void Terminate();
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static void DebuggerInitialize(Debugger &debugger);
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static llvm::StringRef GetPluginNameStatic() { return "dwarf"; }
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static llvm::StringRef GetPluginDescriptionStatic();
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static SymbolFile *CreateInstance(lldb::ObjectFileSP objfile_sp);
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// Constructors and Destructors
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SymbolFileDWARF(lldb::ObjectFileSP objfile_sp, SectionList *dwo_section_list);
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~SymbolFileDWARF() override;
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uint32_t CalculateAbilities() override;
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void InitializeObject() override;
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// Compile Unit function calls
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lldb::LanguageType ParseLanguage(CompileUnit &comp_unit) override;
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XcodeSDK ParseXcodeSDK(CompileUnit &comp_unit) override;
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size_t ParseFunctions(CompileUnit &comp_unit) override;
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bool ParseLineTable(CompileUnit &comp_unit) override;
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bool ParseDebugMacros(CompileUnit &comp_unit) override;
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bool ForEachExternalModule(CompileUnit &, llvm::DenseSet<SymbolFile *> &,
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llvm::function_ref<bool(Module &)>) override;
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bool ParseSupportFiles(CompileUnit &comp_unit,
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FileSpecList &support_files) override;
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bool ParseIsOptimized(CompileUnit &comp_unit) override;
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size_t ParseTypes(CompileUnit &comp_unit) override;
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bool
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ParseImportedModules(const SymbolContext &sc,
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std::vector<SourceModule> &imported_modules) override;
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size_t ParseBlocksRecursive(Function &func) override;
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size_t ParseVariablesForContext(const SymbolContext &sc) override;
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std::optional<ArrayInfo>
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GetDynamicArrayInfoForUID(lldb::user_id_t type_uid,
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const ExecutionContext *exe_ctx) override;
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bool CompleteType(CompilerType &compiler_type) override;
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Type *ResolveType(const DWARFDIE &die, bool assert_not_being_parsed = true,
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bool resolve_function_context = false);
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CompilerDecl GetDeclForUID(lldb::user_id_t uid) override;
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CompilerDeclContext GetDeclContextForUID(lldb::user_id_t uid) override;
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CompilerDeclContext GetDeclContextContainingUID(lldb::user_id_t uid) override;
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std::vector<CompilerContext>
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GetCompilerContextForUID(lldb::user_id_t uid) override;
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void ParseDeclsForContext(CompilerDeclContext decl_ctx) override;
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uint32_t ResolveSymbolContext(const Address &so_addr,
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lldb::SymbolContextItem resolve_scope,
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SymbolContext &sc) override;
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Status CalculateFrameVariableError(StackFrame &frame) override;
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uint32_t ResolveSymbolContext(const SourceLocationSpec &src_location_spec,
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lldb::SymbolContextItem resolve_scope,
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SymbolContextList &sc_list) override;
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void FindGlobalVariables(ConstString name,
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const CompilerDeclContext &parent_decl_ctx,
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uint32_t max_matches,
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VariableList &variables) override;
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void FindGlobalVariables(const RegularExpression ®ex, uint32_t max_matches,
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VariableList &variables) override;
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void FindFunctions(const Module::LookupInfo &lookup_info,
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const CompilerDeclContext &parent_decl_ctx,
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bool include_inlines, SymbolContextList &sc_list) override;
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void FindFunctions(const RegularExpression ®ex, bool include_inlines,
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SymbolContextList &sc_list) override;
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void
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GetMangledNamesForFunction(const std::string &scope_qualified_name,
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std::vector<ConstString> &mangled_names) override;
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void FindTypes(ConstString name, const CompilerDeclContext &parent_decl_ctx,
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uint32_t max_matches,
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llvm::DenseSet<SymbolFile *> &searched_symbol_files,
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TypeMap &types) override;
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void FindTypes(llvm::ArrayRef<CompilerContext> pattern, LanguageSet languages,
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llvm::DenseSet<SymbolFile *> &searched_symbol_files,
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TypeMap &types) override;
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void GetTypes(SymbolContextScope *sc_scope, lldb::TypeClass type_mask,
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TypeList &type_list) override;
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llvm::Expected<lldb::TypeSystemSP>
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GetTypeSystemForLanguage(lldb::LanguageType language) override;
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CompilerDeclContext FindNamespace(ConstString name,
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const CompilerDeclContext &parent_decl_ctx,
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bool only_root_namespaces) override;
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void PreloadSymbols() override;
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std::recursive_mutex &GetModuleMutex() const override;
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// PluginInterface protocol
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llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
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llvm::DWARFDebugAbbrev *DebugAbbrev();
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DWARFDebugInfo &DebugInfo();
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DWARFDebugRanges *GetDebugRanges();
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static bool SupportedVersion(uint16_t version);
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DWARFDIE
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GetDeclContextDIEContainingDIE(const DWARFDIE &die);
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bool HasForwardDeclForCompilerType(const CompilerType &compiler_type);
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CompileUnit *GetCompUnitForDWARFCompUnit(DWARFCompileUnit &dwarf_cu);
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virtual void GetObjCMethods(ConstString class_name,
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llvm::function_ref<bool(DWARFDIE die)> callback);
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bool Supports_DW_AT_APPLE_objc_complete_type(DWARFUnit *cu);
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DebugMacrosSP ParseDebugMacros(lldb::offset_t *offset);
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static DWARFDIE GetParentSymbolContextDIE(const DWARFDIE &die);
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lldb::ModuleSP GetExternalModule(ConstString name);
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typedef std::map<ConstString, lldb::ModuleSP> ExternalTypeModuleMap;
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/// Return the list of Clang modules imported by this SymbolFile.
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const ExternalTypeModuleMap &getExternalTypeModules() const {
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return m_external_type_modules;
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}
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virtual DWARFDIE GetDIE(const DIERef &die_ref);
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DWARFDIE GetDIE(lldb::user_id_t uid);
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std::shared_ptr<SymbolFileDWARFDwo>
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GetDwoSymbolFileForCompileUnit(DWARFUnit &dwarf_cu,
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const DWARFDebugInfoEntry &cu_die);
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/// If this is a DWARF object with a single CU, return its DW_AT_dwo_id.
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std::optional<uint64_t> GetDWOId();
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static bool DIEInDeclContext(const CompilerDeclContext &parent_decl_ctx,
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const DWARFDIE &die,
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bool only_root_namespaces = false);
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std::vector<std::unique_ptr<CallEdge>>
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ParseCallEdgesInFunction(UserID func_id) override;
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void Dump(Stream &s) override;
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void DumpClangAST(Stream &s) override;
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/// List separate dwo files.
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bool GetSeparateDebugInfo(StructuredData::Dictionary &d,
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bool errors_only) override;
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DWARFContext &GetDWARFContext() { return m_context; }
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const std::shared_ptr<SymbolFileDWARFDwo> &GetDwpSymbolFile();
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FileSpec GetFile(DWARFUnit &unit, size_t file_idx);
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static llvm::Expected<lldb::TypeSystemSP> GetTypeSystem(DWARFUnit &unit);
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static DWARFASTParser *GetDWARFParser(DWARFUnit &unit);
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// CompilerDecl related functions
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static CompilerDecl GetDecl(const DWARFDIE &die);
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static CompilerDeclContext GetDeclContext(const DWARFDIE &die);
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static CompilerDeclContext GetContainingDeclContext(const DWARFDIE &die);
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static DWARFDeclContext GetDWARFDeclContext(const DWARFDIE &die);
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static lldb::LanguageType LanguageTypeFromDWARF(uint64_t val);
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static lldb::LanguageType GetLanguage(DWARFUnit &unit);
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/// Same as GetLanguage() but reports all C++ versions as C++ (no version).
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static lldb::LanguageType GetLanguageFamily(DWARFUnit &unit);
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StatsDuration::Duration GetDebugInfoParseTime() override {
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return m_parse_time;
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}
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StatsDuration::Duration GetDebugInfoIndexTime() override;
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StatsDuration &GetDebugInfoParseTimeRef() { return m_parse_time; }
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virtual lldb::offset_t
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GetVendorDWARFOpcodeSize(const DataExtractor &data,
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const lldb::offset_t data_offset,
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const uint8_t op) const {
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return LLDB_INVALID_OFFSET;
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}
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virtual bool ParseVendorDWARFOpcode(uint8_t op, const DataExtractor &opcodes,
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lldb::offset_t &offset,
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std::vector<Value> &stack) const {
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return false;
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}
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ConstString ConstructFunctionDemangledName(const DWARFDIE &die);
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std::optional<uint64_t> GetFileIndex() const { return m_file_index; }
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void SetFileIndex(std::optional<uint64_t> file_index) {
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m_file_index = file_index;
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}
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typedef llvm::DenseMap<const DWARFDebugInfoEntry *, Type *> DIEToTypePtr;
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virtual DIEToTypePtr &GetDIEToType() { return m_die_to_type; }
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typedef llvm::DenseMap<const DWARFDebugInfoEntry *,
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lldb::opaque_compiler_type_t>
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DIEToCompilerType;
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virtual DIEToCompilerType &GetForwardDeclDIEToCompilerType() {
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return m_forward_decl_die_to_compiler_type;
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}
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typedef llvm::DenseMap<lldb::opaque_compiler_type_t, DIERef>
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CompilerTypeToDIE;
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virtual CompilerTypeToDIE &GetForwardDeclCompilerTypeToDIE() {
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return m_forward_decl_compiler_type_to_die;
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}
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typedef llvm::DenseMap<const DWARFDebugInfoEntry *, lldb::VariableSP>
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DIEToVariableSP;
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virtual DIEToVariableSP &GetDIEToVariable() { return m_die_to_variable_sp; }
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virtual UniqueDWARFASTTypeMap &GetUniqueDWARFASTTypeMap();
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bool ClassOrStructIsVirtual(const DWARFDIE &die);
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SymbolFileDWARFDebugMap *GetDebugMapSymfile();
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virtual lldb::TypeSP
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FindDefinitionTypeForDWARFDeclContext(const DWARFDIE &die);
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virtual lldb::TypeSP FindCompleteObjCDefinitionTypeForDIE(
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const DWARFDIE &die, ConstString type_name, bool must_be_implementation);
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Type *ResolveTypeUID(lldb::user_id_t type_uid) override;
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Type *ResolveTypeUID(const DWARFDIE &die, bool assert_not_being_parsed);
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Type *ResolveTypeUID(const DIERef &die_ref);
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protected:
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SymbolFileDWARF(const SymbolFileDWARF &) = delete;
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const SymbolFileDWARF &operator=(const SymbolFileDWARF &) = delete;
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virtual void LoadSectionData(lldb::SectionType sect_type,
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DWARFDataExtractor &data);
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bool DeclContextMatchesThisSymbolFile(const CompilerDeclContext &decl_ctx);
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uint32_t CalculateNumCompileUnits() override;
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lldb::CompUnitSP ParseCompileUnitAtIndex(uint32_t index) override;
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TypeList &GetTypeList() override;
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lldb::CompUnitSP ParseCompileUnit(DWARFCompileUnit &dwarf_cu);
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virtual DWARFCompileUnit *GetDWARFCompileUnit(CompileUnit *comp_unit);
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DWARFUnit *GetNextUnparsedDWARFCompileUnit(DWARFUnit *prev_cu);
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bool GetFunction(const DWARFDIE &die, SymbolContext &sc);
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Function *ParseFunction(CompileUnit &comp_unit, const DWARFDIE &die);
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size_t ParseBlocksRecursive(CompileUnit &comp_unit, Block *parent_block,
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const DWARFDIE &die,
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lldb::addr_t subprogram_low_pc, uint32_t depth);
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size_t ParseTypes(const SymbolContext &sc, const DWARFDIE &die,
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bool parse_siblings, bool parse_children);
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lldb::TypeSP ParseType(const SymbolContext &sc, const DWARFDIE &die,
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bool *type_is_new);
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bool ParseSupportFiles(DWARFUnit &dwarf_cu, const lldb::ModuleSP &module,
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FileSpecList &support_files);
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lldb::VariableSP ParseVariableDIE(const SymbolContext &sc,
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const DWARFDIE &die,
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const lldb::addr_t func_low_pc);
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lldb::VariableSP ParseVariableDIECached(const SymbolContext &sc,
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const DWARFDIE &die);
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void ParseAndAppendGlobalVariable(const SymbolContext &sc,
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const DWARFDIE &die,
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VariableList &cc_variable_list);
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size_t ParseVariablesInFunctionContext(const SymbolContext &sc,
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const DWARFDIE &die,
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const lldb::addr_t func_low_pc);
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size_t ParseVariablesInFunctionContextRecursive(const SymbolContext &sc,
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const DWARFDIE &die,
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lldb::addr_t func_low_pc,
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DIEArray &accumulator);
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size_t PopulateBlockVariableList(VariableList &variable_list,
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const SymbolContext &sc,
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llvm::ArrayRef<DIERef> variable_dies,
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lldb::addr_t func_low_pc);
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DIEArray MergeBlockAbstractParameters(const DWARFDIE &block_die,
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DIEArray &&variable_dies);
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// Given a die_offset, figure out the symbol context representing that die.
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bool ResolveFunction(const DWARFDIE &die, bool include_inlines,
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SymbolContextList &sc_list);
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/// Resolve functions and (possibly) blocks for the given file address and a
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/// compile unit. The compile unit comes from the sc argument and it must be
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/// set. The results of the lookup (if any) are written back to the symbol
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/// context.
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void ResolveFunctionAndBlock(lldb::addr_t file_vm_addr, bool lookup_block,
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SymbolContext &sc);
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Symbol *GetObjCClassSymbol(ConstString objc_class_name);
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lldb::TypeSP GetTypeForDIE(const DWARFDIE &die,
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bool resolve_function_context = false);
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void SetDebugMapModule(const lldb::ModuleSP &module_sp) {
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m_debug_map_module_wp = module_sp;
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}
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DWARFDIE
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FindBlockContainingSpecification(const DIERef &func_die_ref,
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dw_offset_t spec_block_die_offset);
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DWARFDIE
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FindBlockContainingSpecification(const DWARFDIE &die,
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dw_offset_t spec_block_die_offset);
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bool DIEDeclContextsMatch(const DWARFDIE &die1, const DWARFDIE &die2);
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bool ClassContainsSelector(const DWARFDIE &class_die, ConstString selector);
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/// Parse call site entries (DW_TAG_call_site), including any nested call site
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/// parameters (DW_TAG_call_site_parameter).
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std::vector<std::unique_ptr<CallEdge>>
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CollectCallEdges(lldb::ModuleSP module, DWARFDIE function_die);
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/// If this symbol file is linked to by a debug map (see
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/// SymbolFileDWARFDebugMap), and \p file_addr is a file address relative to
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/// an object file, adjust \p file_addr so that it is relative to the main
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/// binary. Returns the adjusted address, or \p file_addr if no adjustment is
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/// needed, on success and LLDB_INVALID_ADDRESS otherwise.
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lldb::addr_t FixupAddress(lldb::addr_t file_addr);
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bool FixupAddress(Address &addr);
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typedef llvm::SetVector<Type *> TypeSet;
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void GetTypes(const DWARFDIE &die, dw_offset_t min_die_offset,
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dw_offset_t max_die_offset, uint32_t type_mask,
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TypeSet &type_set);
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typedef RangeDataVector<lldb::addr_t, lldb::addr_t, Variable *>
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GlobalVariableMap;
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GlobalVariableMap &GetGlobalAranges();
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void UpdateExternalModuleListIfNeeded();
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void BuildCuTranslationTable();
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std::optional<uint32_t> GetDWARFUnitIndex(uint32_t cu_idx);
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void FindDwpSymbolFile();
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const FileSpecList &GetTypeUnitSupportFiles(DWARFTypeUnit &tu);
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void InitializeFirstCodeAddressRecursive(const SectionList §ion_list);
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void InitializeFirstCodeAddress();
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void
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GetCompileOptions(std::unordered_map<lldb::CompUnitSP, Args> &args) override;
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lldb::ModuleWP m_debug_map_module_wp;
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SymbolFileDWARFDebugMap *m_debug_map_symfile;
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llvm::once_flag m_dwp_symfile_once_flag;
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std::shared_ptr<SymbolFileDWARFDwo> m_dwp_symfile;
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DWARFContext m_context;
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llvm::once_flag m_info_once_flag;
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std::unique_ptr<DWARFDebugInfo> m_info;
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std::unique_ptr<llvm::DWARFDebugAbbrev> m_abbr;
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std::unique_ptr<GlobalVariableMap> m_global_aranges_up;
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typedef std::unordered_map<lldb::offset_t, DebugMacrosSP> DebugMacrosMap;
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DebugMacrosMap m_debug_macros_map;
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ExternalTypeModuleMap m_external_type_modules;
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std::unique_ptr<DWARFIndex> m_index;
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bool m_fetched_external_modules : 1;
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LazyBool m_supports_DW_AT_APPLE_objc_complete_type;
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typedef std::set<DIERef> DIERefSet;
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typedef llvm::StringMap<DIERefSet> NameToOffsetMap;
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NameToOffsetMap m_function_scope_qualified_name_map;
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std::unique_ptr<DWARFDebugRanges> m_ranges;
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UniqueDWARFASTTypeMap m_unique_ast_type_map;
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DIEToTypePtr m_die_to_type;
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DIEToVariableSP m_die_to_variable_sp;
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DIEToCompilerType m_forward_decl_die_to_compiler_type;
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CompilerTypeToDIE m_forward_decl_compiler_type_to_die;
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llvm::DenseMap<dw_offset_t, FileSpecList> m_type_unit_support_files;
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std::vector<uint32_t> m_lldb_cu_to_dwarf_unit;
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/// DWARF does not provide a good way for traditional (concatenating) linkers
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/// to invalidate debug info describing dead-stripped code. These linkers will
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/// keep the debug info but resolve any addresses referring to such code as
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/// zero (BFD) or a small positive integer (zero + relocation addend -- GOLD).
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/// Try to filter out this debug info by comparing it to the lowest code
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/// address in the module.
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lldb::addr_t m_first_code_address = LLDB_INVALID_ADDRESS;
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StatsDuration m_parse_time;
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std::atomic_flag m_dwo_warning_issued = ATOMIC_FLAG_INIT;
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/// If this DWARF file a .DWO file or a DWARF .o file on mac when
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/// no dSYM file is being used, this file index will be set to a
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/// valid value that can be used in DIERef objects which will contain
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/// an index that identifies the .DWO or .o file.
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std::optional<uint64_t> m_file_index;
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};
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} // namespace dwarf
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} // namespace lldb_private::plugin
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#endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_SYMBOLFILEDWARF_H
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