6e66512758
LLVM's DWARF parsing library has a class called DWARFContext which holds all of the various DWARF data sections and lots of other information. LLDB's on the other hand stores all of this directly in SymbolFileDWARF / SymbolFileDWARFDwo and passes this interface around through the parsing library. Obviously this is incompatible with a world where the low level interface does not depend on the high level interface, so we need to move towards a model similar to LLVM's - i.e. all of the context needed for low level parsing should be in a single class, and that class gets passed around. This patch is a small incremental step towards achieving this. The interface and internals deviate from LLVM's for technical reasons, but the high level idea is the same. The goal is, eventually, to remove all occurrences of SymbolFileDWARF from the low level parsing code. For now I've chosen a very simple section - the .debug_aranges section to move into DWARFContext while leaving everything else unchanged. In the short term this is a bit confusing because now the information you need might come from either of 2 different locations. But it's a huge refactor to do this all at once and runs a much higher risk of breaking things. So I think it would be wise to do this in very small pieces. TL;DR - No functional change Differential Revision: https://reviews.llvm.org/D59562 llvm-svn: 356612
512 lines
18 KiB
C++
512 lines
18 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 SymbolFileDWARF_SymbolFileDWARF_h_
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#define SymbolFileDWARF_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 <set>
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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/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/DWARFExpression.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/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/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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//----------------------------------------------------------------------
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// Forward Declarations for this DWARF plugin
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//----------------------------------------------------------------------
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class DebugMapModule;
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class DWARFAbbreviationDeclaration;
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class DWARFAbbreviationDeclarationSet;
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class DWARFileUnit;
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class DWARFDebugAbbrev;
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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 DWARFDebugRangesBase;
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class DWARFDeclContext;
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class DWARFFormValue;
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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 lldb_private::SymbolFile,
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public lldb_private::UserID {
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public:
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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 struct DIERef;
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friend class DWARFUnit;
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friend class DWARFDIE;
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friend class DWARFASTParserClang;
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//------------------------------------------------------------------
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// Static Functions
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//------------------------------------------------------------------
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static void Initialize();
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static void Terminate();
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static void DebuggerInitialize(lldb_private::Debugger &debugger);
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static lldb_private::ConstString GetPluginNameStatic();
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static const char *GetPluginDescriptionStatic();
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static lldb_private::SymbolFile *
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CreateInstance(lldb_private::ObjectFile *obj_file);
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static const lldb_private::FileSpecList &GetSymlinkPaths();
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//------------------------------------------------------------------
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// Constructors and Destructors
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//------------------------------------------------------------------
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SymbolFileDWARF(lldb_private::ObjectFile *ofile);
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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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//------------------------------------------------------------------
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// Compile Unit function calls
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//------------------------------------------------------------------
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uint32_t GetNumCompileUnits() override;
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lldb::CompUnitSP ParseCompileUnitAtIndex(uint32_t index) override;
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lldb::LanguageType
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ParseLanguage(lldb_private::CompileUnit &comp_unit) override;
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size_t ParseFunctions(lldb_private::CompileUnit &comp_unit) override;
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bool ParseLineTable(lldb_private::CompileUnit &comp_unit) override;
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bool ParseDebugMacros(lldb_private::CompileUnit &comp_unit) override;
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bool ParseSupportFiles(lldb_private::CompileUnit &comp_unit,
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lldb_private::FileSpecList &support_files) override;
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bool ParseIsOptimized(lldb_private::CompileUnit &comp_unit) override;
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size_t ParseTypes(lldb_private::CompileUnit &comp_unit) override;
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bool ParseImportedModules(
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const lldb_private::SymbolContext &sc,
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std::vector<lldb_private::SourceModule> &imported_modules) override;
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size_t ParseBlocksRecursive(lldb_private::Function &func) override;
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size_t
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ParseVariablesForContext(const lldb_private::SymbolContext &sc) override;
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lldb_private::Type *ResolveTypeUID(lldb::user_id_t type_uid) override;
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llvm::Optional<ArrayInfo> GetDynamicArrayInfoForUID(
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lldb::user_id_t type_uid,
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const lldb_private::ExecutionContext *exe_ctx) override;
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bool CompleteType(lldb_private::CompilerType &compiler_type) override;
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lldb_private::Type *ResolveType(const DWARFDIE &die,
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bool assert_not_being_parsed = true,
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bool resolve_function_context = false);
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SymbolFileDWARF *GetDWARFForUID(lldb::user_id_t uid);
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DWARFDIE
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GetDIEFromUID(lldb::user_id_t uid);
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lldb_private::CompilerDecl GetDeclForUID(lldb::user_id_t uid) override;
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lldb_private::CompilerDeclContext
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GetDeclContextForUID(lldb::user_id_t uid) override;
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lldb_private::CompilerDeclContext
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GetDeclContextContainingUID(lldb::user_id_t uid) override;
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void
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ParseDeclsForContext(lldb_private::CompilerDeclContext decl_ctx) override;
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uint32_t ResolveSymbolContext(const lldb_private::Address &so_addr,
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lldb::SymbolContextItem resolve_scope,
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lldb_private::SymbolContext &sc) override;
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uint32_t
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ResolveSymbolContext(const lldb_private::FileSpec &file_spec, uint32_t line,
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bool check_inlines,
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lldb::SymbolContextItem resolve_scope,
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lldb_private::SymbolContextList &sc_list) override;
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uint32_t
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FindGlobalVariables(lldb_private::ConstString name,
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const lldb_private::CompilerDeclContext *parent_decl_ctx,
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uint32_t max_matches,
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lldb_private::VariableList &variables) override;
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uint32_t FindGlobalVariables(const lldb_private::RegularExpression ®ex,
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uint32_t max_matches,
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lldb_private::VariableList &variables) override;
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uint32_t
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FindFunctions(lldb_private::ConstString name,
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const lldb_private::CompilerDeclContext *parent_decl_ctx,
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lldb::FunctionNameType name_type_mask, bool include_inlines,
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bool append, lldb_private::SymbolContextList &sc_list) override;
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uint32_t FindFunctions(const lldb_private::RegularExpression ®ex,
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bool include_inlines, bool append,
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lldb_private::SymbolContextList &sc_list) override;
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void GetMangledNamesForFunction(
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const std::string &scope_qualified_name,
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std::vector<lldb_private::ConstString> &mangled_names) override;
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uint32_t
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FindTypes(lldb_private::ConstString name,
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const lldb_private::CompilerDeclContext *parent_decl_ctx,
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bool append, uint32_t max_matches,
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llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
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lldb_private::TypeMap &types) override;
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size_t FindTypes(const std::vector<lldb_private::CompilerContext> &context,
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bool append, lldb_private::TypeMap &types) override;
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lldb_private::TypeList *GetTypeList() override;
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size_t GetTypes(lldb_private::SymbolContextScope *sc_scope,
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lldb::TypeClass type_mask,
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lldb_private::TypeList &type_list) override;
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lldb_private::TypeSystem *
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GetTypeSystemForLanguage(lldb::LanguageType language) override;
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lldb_private::CompilerDeclContext FindNamespace(
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lldb_private::ConstString name,
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const lldb_private::CompilerDeclContext *parent_decl_ctx) override;
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void PreloadSymbols() override;
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std::recursive_mutex &GetModuleMutex() const override;
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//------------------------------------------------------------------
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// PluginInterface protocol
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//------------------------------------------------------------------
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lldb_private::ConstString GetPluginName() override;
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uint32_t GetPluginVersion() override;
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virtual const lldb_private::DWARFDataExtractor &get_debug_abbrev_data();
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virtual const lldb_private::DWARFDataExtractor &get_debug_addr_data();
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const lldb_private::DWARFDataExtractor &get_debug_frame_data();
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virtual const lldb_private::DWARFDataExtractor &get_debug_info_data();
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const lldb_private::DWARFDataExtractor &get_debug_line_data();
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const lldb_private::DWARFDataExtractor &get_debug_line_str_data();
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const lldb_private::DWARFDataExtractor &get_debug_macro_data();
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const lldb_private::DWARFDataExtractor &get_debug_loc_data();
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const lldb_private::DWARFDataExtractor &get_debug_loclists_data();
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const lldb_private::DWARFDataExtractor &get_debug_ranges_data();
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const lldb_private::DWARFDataExtractor &get_debug_rnglists_data();
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virtual const lldb_private::DWARFDataExtractor &get_debug_str_data();
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virtual const lldb_private::DWARFDataExtractor &get_debug_str_offsets_data();
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const lldb_private::DWARFDataExtractor &get_debug_types_data();
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const lldb_private::DWARFDataExtractor &get_apple_names_data();
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const lldb_private::DWARFDataExtractor &get_apple_types_data();
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const lldb_private::DWARFDataExtractor &get_apple_namespaces_data();
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const lldb_private::DWARFDataExtractor &get_apple_objc_data();
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const lldb_private::DWARFDataExtractor &get_gnu_debugaltlink();
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DWARFDebugAbbrev *DebugAbbrev();
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const DWARFDebugAbbrev *DebugAbbrev() const;
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DWARFDebugInfo *DebugInfo();
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const DWARFDebugInfo *DebugInfo() const;
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DWARFDebugRangesBase *DebugRanges();
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const DWARFDebugRangesBase *DebugRanges() const;
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const lldb_private::DWARFDataExtractor &DebugLocData();
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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
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HasForwardDeclForClangType(const lldb_private::CompilerType &compiler_type);
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lldb_private::CompileUnit *
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GetCompUnitForDWARFCompUnit(DWARFUnit *dwarf_cu,
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uint32_t cu_idx = UINT32_MAX);
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virtual size_t GetObjCMethodDIEOffsets(lldb_private::ConstString class_name,
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DIEArray &method_die_offsets);
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bool Supports_DW_AT_APPLE_objc_complete_type(DWARFUnit *cu);
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lldb_private::DebugMacrosSP ParseDebugMacros(lldb::offset_t *offset);
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static DWARFDIE GetParentSymbolContextDIE(const DWARFDIE &die);
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virtual lldb::CompUnitSP ParseCompileUnit(DWARFUnit *dwarf_cu,
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uint32_t cu_idx);
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virtual lldb_private::DWARFExpression::LocationListFormat
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GetLocationListFormat() const;
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lldb::ModuleSP GetDWOModule(lldb_private::ConstString name);
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typedef std::map<lldb_private::ConstString, lldb::ModuleSP>
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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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virtual std::unique_ptr<SymbolFileDWARFDwo>
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GetDwoSymbolFileForCompileUnit(DWARFUnit &dwarf_cu,
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const DWARFDebugInfoEntry &cu_die);
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// For regular SymbolFileDWARF instances the method returns nullptr,
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// for the instances of the subclass SymbolFileDWARFDwo
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// the method returns a pointer to the base compile unit.
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virtual DWARFUnit *GetBaseCompileUnit();
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static bool
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DIEInDeclContext(const lldb_private::CompilerDeclContext *parent_decl_ctx,
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const DWARFDIE &die);
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std::vector<lldb_private::CallEdge>
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ParseCallEdgesInFunction(UserID func_id) override;
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void Dump(lldb_private::Stream &s) override;
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void DumpClangAST(lldb_private::Stream &s) override;
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protected:
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typedef llvm::DenseMap<const DWARFDebugInfoEntry *, lldb_private::Type *>
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DIEToTypePtr;
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typedef llvm::DenseMap<const DWARFDebugInfoEntry *, lldb::VariableSP>
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DIEToVariableSP;
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typedef llvm::DenseMap<const DWARFDebugInfoEntry *,
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lldb::opaque_compiler_type_t>
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DIEToClangType;
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typedef llvm::DenseMap<lldb::opaque_compiler_type_t, DIERef> ClangTypeToDIE;
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struct DWARFDataSegment {
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llvm::once_flag m_flag;
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lldb_private::DWARFDataExtractor m_data;
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};
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DISALLOW_COPY_AND_ASSIGN(SymbolFileDWARF);
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const lldb_private::DWARFDataExtractor &
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GetCachedSectionData(lldb::SectionType sect_type,
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DWARFDataSegment &data_segment);
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virtual void LoadSectionData(lldb::SectionType sect_type,
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lldb_private::DWARFDataExtractor &data);
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bool DeclContextMatchesThisSymbolFile(
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const lldb_private::CompilerDeclContext *decl_ctx);
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virtual DWARFUnit *
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GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit);
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DWARFUnit *GetNextUnparsedDWARFCompileUnit(DWARFUnit *prev_cu);
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bool GetFunction(const DWARFDIE &die, lldb_private::SymbolContext &sc);
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lldb_private::Function *ParseFunction(lldb_private::CompileUnit &comp_unit,
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const DWARFDIE &die);
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size_t ParseBlocksRecursive(lldb_private::CompileUnit &comp_unit,
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lldb_private::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 lldb_private::SymbolContext &sc, const DWARFDIE &die,
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bool parse_siblings, bool parse_children);
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lldb::TypeSP ParseType(const lldb_private::SymbolContext &sc,
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const DWARFDIE &die, bool *type_is_new);
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lldb_private::Type *ResolveTypeUID(const DWARFDIE &die,
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bool assert_not_being_parsed);
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lldb_private::Type *ResolveTypeUID(const DIERef &die_ref);
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lldb::VariableSP ParseVariableDIE(const lldb_private::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 ParseVariables(const lldb_private::SymbolContext &sc,
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const DWARFDIE &orig_die,
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const lldb::addr_t func_low_pc, bool parse_siblings,
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bool parse_children,
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lldb_private::VariableList *cc_variable_list = NULL);
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bool ClassOrStructIsVirtual(const DWARFDIE &die);
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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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lldb_private::SymbolContextList &sc_list);
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virtual lldb::TypeSP
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FindDefinitionTypeForDWARFDeclContext(const DWARFDeclContext &die_decl_ctx);
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virtual lldb::TypeSP FindCompleteObjCDefinitionTypeForDIE(
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const DWARFDIE &die, lldb_private::ConstString type_name,
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bool must_be_implementation);
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lldb_private::Symbol *
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GetObjCClassSymbol(lldb_private::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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SymbolFileDWARFDebugMap *GetDebugMapSymfile();
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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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virtual UniqueDWARFASTTypeMap &GetUniqueDWARFASTTypeMap();
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bool DIEDeclContextsMatch(const DWARFDIE &die1, const DWARFDIE &die2);
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bool ClassContainsSelector(const DWARFDIE &class_die,
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lldb_private::ConstString selector);
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bool FixupAddress(lldb_private::Address &addr);
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typedef std::set<lldb_private::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 lldb_private::RangeDataVector<lldb::addr_t, lldb::addr_t,
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lldb_private::Variable *>
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GlobalVariableMap;
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GlobalVariableMap &GetGlobalAranges();
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void UpdateExternalModuleListIfNeeded();
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virtual DIEToTypePtr &GetDIEToType() { return m_die_to_type; }
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virtual DIEToVariableSP &GetDIEToVariable() { return m_die_to_variable_sp; }
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virtual DIEToClangType &GetForwardDeclDieToClangType() {
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return m_forward_decl_die_to_clang_type;
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}
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virtual ClangTypeToDIE &GetForwardDeclClangTypeToDie() {
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return m_forward_decl_clang_type_to_die;
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}
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SymbolFileDWARFDwp *GetDwpSymbolFile();
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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::unique_ptr<SymbolFileDWARFDwp> m_dwp_symfile;
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lldb_private::DWARFContext m_context;
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DWARFDataSegment m_data_debug_abbrev;
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DWARFDataSegment m_data_debug_addr;
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DWARFDataSegment m_data_debug_frame;
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DWARFDataSegment m_data_debug_info;
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DWARFDataSegment m_data_debug_line;
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DWARFDataSegment m_data_debug_line_str;
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DWARFDataSegment m_data_debug_macro;
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DWARFDataSegment m_data_debug_loc;
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DWARFDataSegment m_data_debug_loclists;
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DWARFDataSegment m_data_debug_ranges;
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DWARFDataSegment m_data_debug_rnglists;
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DWARFDataSegment m_data_debug_str;
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DWARFDataSegment m_data_debug_str_offsets;
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DWARFDataSegment m_data_debug_types;
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DWARFDataSegment m_data_apple_names;
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DWARFDataSegment m_data_apple_types;
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DWARFDataSegment m_data_apple_namespaces;
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DWARFDataSegment m_data_apple_objc;
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DWARFDataSegment m_data_gnu_debugaltlink;
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// The unique pointer items below are generated on demand if and when someone
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// accesses
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// them through a non const version of this class.
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std::unique_ptr<DWARFDebugAbbrev> m_abbr;
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std::unique_ptr<DWARFDebugInfo> m_info;
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std::unique_ptr<DWARFDebugLine> m_line;
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std::unique_ptr<GlobalVariableMap> m_global_aranges_up;
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typedef std::unordered_map<lldb::offset_t, lldb_private::DebugMacrosSP>
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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<lldb_private::DWARFIndex> m_index;
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bool m_fetched_external_modules : 1;
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lldb_private::LazyBool m_supports_DW_AT_APPLE_objc_complete_type;
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typedef std::shared_ptr<std::set<DIERef>> DIERefSetSP;
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typedef std::unordered_map<std::string, DIERefSetSP> NameToOffsetMap;
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NameToOffsetMap m_function_scope_qualified_name_map;
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std::unique_ptr<DWARFDebugRangesBase> 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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DIEToClangType m_forward_decl_die_to_clang_type;
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ClangTypeToDIE m_forward_decl_clang_type_to_die;
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};
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#endif // SymbolFileDWARF_SymbolFileDWARF_h_
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