eca07c592a
Clang recently improved its DWARF support for C VLA types. The DWARF
now looks like this:
0x00000051: DW_TAG_variable [4]
DW_AT_location( fbreg -32 )
DW_AT_name( "__vla_expr" )
DW_AT_type( {0x000000d3} ( long unsigned int ) )
DW_AT_artificial( true )
...
0x000000da: DW_TAG_array_type [10] *
DW_AT_type( {0x000000cc} ( int ) )
0x000000df: DW_TAG_subrange_type [11]
DW_AT_type( {0x000000e9} ( __ARRAY_SIZE_TYPE__ ) )
DW_AT_count( {0x00000051} )
Without this patch LLDB will naively interpret the DIE offset 0x51 as
the static size of the array, which is clearly wrong. This patch
extends ValueObject::GetNumChildren to query the dynamic properties of
incomplete array types.
See the testcase for an example:
4 int foo(int a) {
5 int vla[a];
6 for (int i = 0; i < a; ++i)
7 vla[i] = i;
8
-> 9 pause(); // break here
10 return vla[a-1];
11 }
(lldb) fr v vla
(int []) vla = ([0] = 0, [1] = 1, [2] = 2, [3] = 3)
(lldb) quit
rdar://problem/21814005
Differential Revision: https://reviews.llvm.org/D53530
llvm-svn: 346165
223 lines
8.0 KiB
C++
223 lines
8.0 KiB
C++
//===-- SymbolFileNativePDB.h -----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_PLUGINS_SYMBOLFILE_NATIVEPDB_SYMBOLFILENATIVEPDB_H
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#define LLDB_PLUGINS_SYMBOLFILE_NATIVEPDB_SYMBOLFILENATIVEPDB_H
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#include "lldb/Symbol/ClangASTImporter.h"
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#include "lldb/Symbol/SymbolFile.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/DebugInfo/CodeView/CVRecord.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
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#include "llvm/DebugInfo/PDB/PDBTypes.h"
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#include "CompileUnitIndex.h"
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#include "PdbIndex.h"
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namespace clang {
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class TagDecl;
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}
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namespace llvm {
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namespace codeview {
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class ClassRecord;
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class EnumRecord;
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class ModifierRecord;
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class PointerRecord;
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struct UnionRecord;
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} // namespace codeview
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} // namespace llvm
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namespace lldb_private {
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class ClangASTImporter;
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namespace npdb {
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struct DeclStatus {
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DeclStatus() = default;
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DeclStatus(lldb::user_id_t uid, Type::ResolveStateTag status)
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: uid(uid), status(status) {}
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lldb::user_id_t uid = 0;
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Type::ResolveStateTag status = Type::eResolveStateForward;
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};
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class SymbolFileNativePDB : public SymbolFile {
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friend class UdtRecordCompleter;
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public:
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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(Debugger &debugger);
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static ConstString GetPluginNameStatic();
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static const char *GetPluginDescriptionStatic();
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static SymbolFile *CreateInstance(ObjectFile *obj_file);
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//------------------------------------------------------------------
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// Constructors and Destructors
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//------------------------------------------------------------------
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SymbolFileNativePDB(ObjectFile *ofile);
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~SymbolFileNativePDB() 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 ParseCompileUnitLanguage(const SymbolContext &sc) override;
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size_t ParseCompileUnitFunctions(const SymbolContext &sc) override;
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bool ParseCompileUnitLineTable(const SymbolContext &sc) override;
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bool ParseCompileUnitDebugMacros(const SymbolContext &sc) override;
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bool ParseCompileUnitSupportFiles(const SymbolContext &sc,
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FileSpecList &support_files) override;
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bool
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ParseImportedModules(const SymbolContext &sc,
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std::vector<ConstString> &imported_modules) override;
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size_t ParseFunctionBlocks(const SymbolContext &sc) override;
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uint32_t FindGlobalVariables(const 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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size_t ParseTypes(const SymbolContext &sc) override;
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size_t ParseVariablesForContext(const SymbolContext &sc) override {
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return 0;
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}
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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(CompilerType &compiler_type) 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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size_t GetTypes(SymbolContextScope *sc_scope, lldb::TypeClass type_mask,
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TypeList &type_list) override;
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uint32_t FindFunctions(const ConstString &name,
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const CompilerDeclContext *parent_decl_ctx,
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lldb::FunctionNameType name_type_mask,
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bool include_inlines, bool append,
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SymbolContextList &sc_list) override;
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uint32_t FindFunctions(const RegularExpression ®ex, bool include_inlines,
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bool append, SymbolContextList &sc_list) override;
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uint32_t FindTypes(const SymbolContext &sc, const ConstString &name,
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const CompilerDeclContext *parent_decl_ctx, bool append,
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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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size_t FindTypes(const std::vector<CompilerContext> &context, bool append,
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TypeMap &types) override;
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TypeSystem *GetTypeSystemForLanguage(lldb::LanguageType language) override;
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CompilerDeclContext
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FindNamespace(const SymbolContext &sc, const ConstString &name,
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const CompilerDeclContext *parent_decl_ctx) override;
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ConstString GetPluginName() override;
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uint32_t GetPluginVersion() override;
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llvm::pdb::PDBFile &GetPDBFile() { return m_index->pdb(); }
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const llvm::pdb::PDBFile &GetPDBFile() const { return m_index->pdb(); }
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ClangASTContext &GetASTContext() { return *m_clang; }
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ClangASTImporter &GetASTImporter() { return *m_importer; }
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void DumpClangAST(Stream &s) override;
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private:
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size_t FindTypesByName(llvm::StringRef name, uint32_t max_matches,
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TypeMap &types);
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lldb::TypeSP CreateModifierType(PdbSymUid type_uid,
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const llvm::codeview::ModifierRecord &mr);
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lldb::TypeSP CreatePointerType(PdbSymUid type_uid,
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const llvm::codeview::PointerRecord &pr);
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lldb::TypeSP CreateSimpleType(llvm::codeview::TypeIndex ti);
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lldb::TypeSP CreateTagType(PdbSymUid type_uid,
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const llvm::codeview::ClassRecord &cr);
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lldb::TypeSP CreateTagType(PdbSymUid type_uid,
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const llvm::codeview::EnumRecord &er);
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lldb::TypeSP CreateTagType(PdbSymUid type_uid,
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const llvm::codeview::UnionRecord &ur);
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lldb::TypeSP CreateArrayType(PdbSymUid type_uid,
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const llvm::codeview::ArrayRecord &ar);
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lldb::TypeSP CreateProcedureType(PdbSymUid type_uid,
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const llvm::codeview::ProcedureRecord &pr);
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lldb::TypeSP
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CreateClassStructUnion(PdbSymUid type_uid, llvm::StringRef name, size_t size,
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clang::TagTypeKind ttk,
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clang::MSInheritanceAttr::Spelling inheritance);
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lldb::FunctionSP GetOrCreateFunction(PdbSymUid func_uid,
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const SymbolContext &sc);
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lldb::CompUnitSP GetOrCreateCompileUnit(const CompilandIndexItem &cci);
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lldb::TypeSP GetOrCreateType(PdbSymUid type_uid);
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lldb::TypeSP GetOrCreateType(llvm::codeview::TypeIndex ti);
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lldb::VariableSP GetOrCreateGlobalVariable(PdbSymUid var_uid);
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lldb::FunctionSP CreateFunction(PdbSymUid func_uid, const SymbolContext &sc);
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lldb::CompUnitSP CreateCompileUnit(const CompilandIndexItem &cci);
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lldb::TypeSP CreateType(PdbSymUid type_uid);
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lldb::TypeSP CreateAndCacheType(PdbSymUid type_uid);
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lldb::VariableSP CreateGlobalVariable(PdbSymUid var_uid);
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llvm::BumpPtrAllocator m_allocator;
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lldb::addr_t m_obj_load_address = 0;
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std::unique_ptr<PdbIndex> m_index;
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std::unique_ptr<ClangASTImporter> m_importer;
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ClangASTContext *m_clang = nullptr;
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llvm::DenseMap<clang::TagDecl *, DeclStatus> m_decl_to_status;
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llvm::DenseMap<lldb::user_id_t, clang::TagDecl *> m_uid_to_decl;
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llvm::DenseMap<lldb::user_id_t, lldb::VariableSP> m_global_vars;
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llvm::DenseMap<lldb::user_id_t, lldb::FunctionSP> m_functions;
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llvm::DenseMap<lldb::user_id_t, lldb::CompUnitSP> m_compilands;
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llvm::DenseMap<lldb::user_id_t, lldb::TypeSP> m_types;
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};
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} // namespace npdb
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} // namespace lldb_private
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#endif // lldb_Plugins_SymbolFile_PDB_SymbolFilePDB_h_
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