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edd690b02e
This patch converts TagTypeKind into scoped enum. Among other benefits, this allows us to forward-declare it where necessary.
3907 lines
140 KiB
C++
3907 lines
140 KiB
C++
//===-- DWARFASTParserClang.cpp -------------------------------------------===//
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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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#include <cstdlib>
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#include "DWARFASTParser.h"
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#include "DWARFASTParserClang.h"
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#include "DWARFDebugInfo.h"
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#include "DWARFDeclContext.h"
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#include "DWARFDefines.h"
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#include "SymbolFileDWARF.h"
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#include "SymbolFileDWARFDebugMap.h"
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#include "SymbolFileDWARFDwo.h"
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#include "UniqueDWARFASTType.h"
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#include "Plugins/ExpressionParser/Clang/ClangASTImporter.h"
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#include "Plugins/ExpressionParser/Clang/ClangASTMetadata.h"
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#include "Plugins/ExpressionParser/Clang/ClangUtil.h"
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#include "Plugins/Language/ObjC/ObjCLanguage.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/Value.h"
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#include "lldb/Host/Host.h"
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#include "lldb/Symbol/CompileUnit.h"
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#include "lldb/Symbol/Function.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/SymbolFile.h"
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#include "lldb/Symbol/TypeList.h"
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#include "lldb/Symbol/TypeMap.h"
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#include "lldb/Target/Language.h"
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#include "lldb/Utility/LLDBAssert.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Utility/StreamString.h"
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#include "clang/AST/CXXInheritance.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/DeclTemplate.h"
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#include "clang/AST/Type.h"
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#include "llvm/Demangle/Demangle.h"
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#include <map>
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#include <memory>
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#include <optional>
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#include <vector>
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//#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
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#ifdef ENABLE_DEBUG_PRINTF
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#include <cstdio>
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#define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
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#else
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#define DEBUG_PRINTF(fmt, ...)
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#endif
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::dwarf;
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using namespace lldb_private::plugin::dwarf;
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DWARFASTParserClang::DWARFASTParserClang(TypeSystemClang &ast)
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: DWARFASTParser(Kind::DWARFASTParserClang), m_ast(ast),
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m_die_to_decl_ctx(), m_decl_ctx_to_die() {}
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DWARFASTParserClang::~DWARFASTParserClang() = default;
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static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) {
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switch (decl_kind) {
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case clang::Decl::CXXRecord:
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case clang::Decl::ClassTemplateSpecialization:
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return true;
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default:
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break;
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}
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return false;
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}
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ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() {
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if (!m_clang_ast_importer_up) {
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m_clang_ast_importer_up = std::make_unique<ClangASTImporter>();
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}
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return *m_clang_ast_importer_up;
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}
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/// Detect a forward declaration that is nested in a DW_TAG_module.
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static bool IsClangModuleFwdDecl(const DWARFDIE &Die) {
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if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0))
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return false;
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auto Parent = Die.GetParent();
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while (Parent.IsValid()) {
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if (Parent.Tag() == DW_TAG_module)
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return true;
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Parent = Parent.GetParent();
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}
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return false;
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}
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static DWARFDIE GetContainingClangModuleDIE(const DWARFDIE &die) {
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if (die.IsValid()) {
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DWARFDIE top_module_die;
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// Now make sure this DIE is scoped in a DW_TAG_module tag and return true
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// if so
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for (DWARFDIE parent = die.GetParent(); parent.IsValid();
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parent = parent.GetParent()) {
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const dw_tag_t tag = parent.Tag();
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if (tag == DW_TAG_module)
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top_module_die = parent;
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else if (tag == DW_TAG_compile_unit || tag == DW_TAG_partial_unit)
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break;
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}
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return top_module_die;
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}
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return DWARFDIE();
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}
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static lldb::ModuleSP GetContainingClangModule(const DWARFDIE &die) {
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if (die.IsValid()) {
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DWARFDIE clang_module_die = GetContainingClangModuleDIE(die);
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if (clang_module_die) {
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const char *module_name = clang_module_die.GetName();
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if (module_name)
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return die.GetDWARF()->GetExternalModule(
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lldb_private::ConstString(module_name));
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}
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}
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return lldb::ModuleSP();
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}
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TypeSP DWARFASTParserClang::ParseTypeFromClangModule(const SymbolContext &sc,
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const DWARFDIE &die,
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Log *log) {
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ModuleSP clang_module_sp = GetContainingClangModule(die);
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if (!clang_module_sp)
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return TypeSP();
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// If this type comes from a Clang module, recursively look in the
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// DWARF section of the .pcm file in the module cache. Clang
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// generates DWO skeleton units as breadcrumbs to find them.
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std::vector<CompilerContext> decl_context = die.GetDeclContext();
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TypeMap pcm_types;
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// The type in the Clang module must have the same language as the current CU.
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LanguageSet languages;
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languages.Insert(SymbolFileDWARF::GetLanguageFamily(*die.GetCU()));
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llvm::DenseSet<SymbolFile *> searched_symbol_files;
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clang_module_sp->GetSymbolFile()->FindTypes(decl_context, languages,
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searched_symbol_files, pcm_types);
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if (pcm_types.Empty()) {
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// Since this type is defined in one of the Clang modules imported
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// by this symbol file, search all of them. Instead of calling
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// sym_file->FindTypes(), which would return this again, go straight
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// to the imported modules.
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auto &sym_file = die.GetCU()->GetSymbolFileDWARF();
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// Well-formed clang modules never form cycles; guard against corrupted
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// ones by inserting the current file.
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searched_symbol_files.insert(&sym_file);
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sym_file.ForEachExternalModule(
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*sc.comp_unit, searched_symbol_files, [&](Module &module) {
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module.GetSymbolFile()->FindTypes(decl_context, languages,
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searched_symbol_files, pcm_types);
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return pcm_types.GetSize();
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});
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}
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if (!pcm_types.GetSize())
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return TypeSP();
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// We found a real definition for this type in the Clang module, so lets use
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// it and cache the fact that we found a complete type for this die.
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TypeSP pcm_type_sp = pcm_types.GetTypeAtIndex(0);
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if (!pcm_type_sp)
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return TypeSP();
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lldb_private::CompilerType pcm_type = pcm_type_sp->GetForwardCompilerType();
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lldb_private::CompilerType type =
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GetClangASTImporter().CopyType(m_ast, pcm_type);
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if (!type)
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return TypeSP();
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// Under normal operation pcm_type is a shallow forward declaration
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// that gets completed later. This is necessary to support cyclic
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// data structures. If, however, pcm_type is already complete (for
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// example, because it was loaded for a different target before),
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// the definition needs to be imported right away, too.
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// Type::ResolveClangType() effectively ignores the ResolveState
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// inside type_sp and only looks at IsDefined(), so it never calls
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// ClangASTImporter::ASTImporterDelegate::ImportDefinitionTo(),
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// which does extra work for Objective-C classes. This would result
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// in only the forward declaration to be visible.
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if (pcm_type.IsDefined())
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GetClangASTImporter().RequireCompleteType(ClangUtil::GetQualType(type));
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SymbolFileDWARF *dwarf = die.GetDWARF();
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auto type_sp = dwarf->MakeType(
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die.GetID(), pcm_type_sp->GetName(), pcm_type_sp->GetByteSize(nullptr),
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nullptr, LLDB_INVALID_UID, Type::eEncodingInvalid,
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&pcm_type_sp->GetDeclaration(), type, Type::ResolveState::Forward,
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TypePayloadClang(GetOwningClangModule(die)));
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dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
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clang::TagDecl *tag_decl = TypeSystemClang::GetAsTagDecl(type);
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if (tag_decl) {
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LinkDeclContextToDIE(tag_decl, die);
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} else {
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clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die);
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if (defn_decl_ctx)
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LinkDeclContextToDIE(defn_decl_ctx, die);
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}
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return type_sp;
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}
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static void ForcefullyCompleteType(CompilerType type) {
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bool started = TypeSystemClang::StartTagDeclarationDefinition(type);
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lldbassert(started && "Unable to start a class type definition.");
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TypeSystemClang::CompleteTagDeclarationDefinition(type);
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const clang::TagDecl *td = ClangUtil::GetAsTagDecl(type);
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auto ts_sp = type.GetTypeSystem();
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auto ts = ts_sp.dyn_cast_or_null<TypeSystemClang>();
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if (ts)
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ts->SetDeclIsForcefullyCompleted(td);
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}
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/// This function serves a similar purpose as RequireCompleteType above, but it
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/// avoids completing the type if it is not immediately necessary. It only
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/// ensures we _can_ complete the type later.
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static void PrepareContextToReceiveMembers(TypeSystemClang &ast,
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ClangASTImporter &ast_importer,
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clang::DeclContext *decl_ctx,
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DWARFDIE die,
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const char *type_name_cstr) {
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auto *tag_decl_ctx = clang::dyn_cast<clang::TagDecl>(decl_ctx);
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if (!tag_decl_ctx)
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return; // Non-tag context are always ready.
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// We have already completed the type, or we have found its definition and are
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// ready to complete it later (cf. ParseStructureLikeDIE).
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if (tag_decl_ctx->isCompleteDefinition() || tag_decl_ctx->isBeingDefined())
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return;
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// We reach this point of the tag was present in the debug info as a
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// declaration only. If it was imported from another AST context (in the
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// gmodules case), we can complete the type by doing a full import.
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// If this type was not imported from an external AST, there's nothing to do.
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CompilerType type = ast.GetTypeForDecl(tag_decl_ctx);
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if (type && ast_importer.CanImport(type)) {
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auto qual_type = ClangUtil::GetQualType(type);
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if (ast_importer.RequireCompleteType(qual_type))
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return;
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die.GetDWARF()->GetObjectFile()->GetModule()->ReportError(
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"Unable to complete the Decl context for DIE {0} at offset "
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"{1:x16}.\nPlease file a bug report.",
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type_name_cstr ? type_name_cstr : "", die.GetOffset());
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}
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// We don't have a type definition and/or the import failed. We must
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// forcefully complete the type to avoid crashes.
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ForcefullyCompleteType(type);
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}
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ParsedDWARFTypeAttributes::ParsedDWARFTypeAttributes(const DWARFDIE &die) {
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DWARFAttributes attributes = die.GetAttributes();
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for (size_t i = 0; i < attributes.Size(); ++i) {
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dw_attr_t attr = attributes.AttributeAtIndex(i);
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DWARFFormValue form_value;
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if (!attributes.ExtractFormValueAtIndex(i, form_value))
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continue;
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switch (attr) {
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default:
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break;
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case DW_AT_abstract_origin:
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abstract_origin = form_value;
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break;
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case DW_AT_accessibility:
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accessibility =
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DWARFASTParser::GetAccessTypeFromDWARF(form_value.Unsigned());
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break;
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case DW_AT_artificial:
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is_artificial = form_value.Boolean();
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break;
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case DW_AT_bit_stride:
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bit_stride = form_value.Unsigned();
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break;
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case DW_AT_byte_size:
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byte_size = form_value.Unsigned();
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break;
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case DW_AT_byte_stride:
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byte_stride = form_value.Unsigned();
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break;
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case DW_AT_calling_convention:
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calling_convention = form_value.Unsigned();
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break;
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case DW_AT_containing_type:
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containing_type = form_value;
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break;
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case DW_AT_decl_file:
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// die.GetCU() can differ if DW_AT_specification uses DW_FORM_ref_addr.
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decl.SetFile(
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attributes.CompileUnitAtIndex(i)->GetFile(form_value.Unsigned()));
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break;
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case DW_AT_decl_line:
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decl.SetLine(form_value.Unsigned());
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break;
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case DW_AT_decl_column:
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decl.SetColumn(form_value.Unsigned());
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break;
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case DW_AT_declaration:
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is_forward_declaration = form_value.Boolean();
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break;
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case DW_AT_encoding:
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encoding = form_value.Unsigned();
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break;
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case DW_AT_enum_class:
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is_scoped_enum = form_value.Boolean();
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break;
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case DW_AT_explicit:
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is_explicit = form_value.Boolean();
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break;
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case DW_AT_external:
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if (form_value.Unsigned())
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storage = clang::SC_Extern;
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break;
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case DW_AT_inline:
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is_inline = form_value.Boolean();
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break;
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case DW_AT_linkage_name:
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case DW_AT_MIPS_linkage_name:
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mangled_name = form_value.AsCString();
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break;
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case DW_AT_name:
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name.SetCString(form_value.AsCString());
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break;
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case DW_AT_object_pointer:
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object_pointer = form_value.Reference();
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break;
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case DW_AT_signature:
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signature = form_value;
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break;
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case DW_AT_specification:
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specification = form_value;
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break;
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case DW_AT_type:
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type = form_value;
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break;
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case DW_AT_virtuality:
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is_virtual = form_value.Boolean();
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break;
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case DW_AT_APPLE_objc_complete_type:
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is_complete_objc_class = form_value.Signed();
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break;
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case DW_AT_APPLE_objc_direct:
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is_objc_direct_call = true;
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break;
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case DW_AT_APPLE_runtime_class:
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class_language = (LanguageType)form_value.Signed();
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break;
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case DW_AT_GNU_vector:
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is_vector = form_value.Boolean();
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break;
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case DW_AT_export_symbols:
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exports_symbols = form_value.Boolean();
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break;
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case DW_AT_rvalue_reference:
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ref_qual = clang::RQ_RValue;
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break;
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case DW_AT_reference:
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ref_qual = clang::RQ_LValue;
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break;
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}
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}
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}
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static std::string GetUnitName(const DWARFDIE &die) {
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if (DWARFUnit *unit = die.GetCU())
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return unit->GetAbsolutePath().GetPath();
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return "<missing DWARF unit path>";
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}
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TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc,
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const DWARFDIE &die,
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bool *type_is_new_ptr) {
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if (type_is_new_ptr)
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*type_is_new_ptr = false;
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if (!die)
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return nullptr;
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Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
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SymbolFileDWARF *dwarf = die.GetDWARF();
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if (log) {
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DWARFDIE context_die;
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clang::DeclContext *context =
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GetClangDeclContextContainingDIE(die, &context_die);
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dwarf->GetObjectFile()->GetModule()->LogMessage(
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log,
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"DWARFASTParserClang::ParseTypeFromDWARF "
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"(die = {0:x16}, decl_ctx = {1:p} (die "
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"{2:x16})) {3} name = '{4}')",
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die.GetOffset(), static_cast<void *>(context), context_die.GetOffset(),
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die.GetTagAsCString(), die.GetName());
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}
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Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE());
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if (type_ptr == DIE_IS_BEING_PARSED)
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return nullptr;
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if (type_ptr)
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return type_ptr->shared_from_this();
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// Set a bit that lets us know that we are currently parsing this
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dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED;
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ParsedDWARFTypeAttributes attrs(die);
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if (DWARFDIE signature_die = attrs.signature.Reference()) {
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if (TypeSP type_sp =
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ParseTypeFromDWARF(sc, signature_die, type_is_new_ptr)) {
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dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
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if (clang::DeclContext *decl_ctx =
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GetCachedClangDeclContextForDIE(signature_die))
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LinkDeclContextToDIE(decl_ctx, die);
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return type_sp;
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}
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return nullptr;
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}
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if (type_is_new_ptr)
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*type_is_new_ptr = true;
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const dw_tag_t tag = die.Tag();
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TypeSP type_sp;
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switch (tag) {
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case DW_TAG_typedef:
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case DW_TAG_base_type:
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case DW_TAG_pointer_type:
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case DW_TAG_reference_type:
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case DW_TAG_rvalue_reference_type:
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case DW_TAG_const_type:
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case DW_TAG_restrict_type:
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case DW_TAG_volatile_type:
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case DW_TAG_atomic_type:
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case DW_TAG_unspecified_type: {
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type_sp = ParseTypeModifier(sc, die, attrs);
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break;
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}
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case DW_TAG_structure_type:
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case DW_TAG_union_type:
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case DW_TAG_class_type: {
|
|
type_sp = ParseStructureLikeDIE(sc, die, attrs);
|
|
break;
|
|
}
|
|
|
|
case DW_TAG_enumeration_type: {
|
|
type_sp = ParseEnum(sc, die, attrs);
|
|
break;
|
|
}
|
|
|
|
case DW_TAG_inlined_subroutine:
|
|
case DW_TAG_subprogram:
|
|
case DW_TAG_subroutine_type: {
|
|
type_sp = ParseSubroutine(die, attrs);
|
|
break;
|
|
}
|
|
case DW_TAG_array_type: {
|
|
type_sp = ParseArrayType(die, attrs);
|
|
break;
|
|
}
|
|
case DW_TAG_ptr_to_member_type: {
|
|
type_sp = ParsePointerToMemberType(die, attrs);
|
|
break;
|
|
}
|
|
default:
|
|
dwarf->GetObjectFile()->GetModule()->ReportError(
|
|
"[{0:x16}]: unhandled type tag {1:x4} ({2}), "
|
|
"please file a bug and "
|
|
"attach the file at the start of this error message",
|
|
die.GetOffset(), tag, DW_TAG_value_to_name(tag));
|
|
break;
|
|
}
|
|
|
|
// TODO: We should consider making the switch above exhaustive to simplify
|
|
// control flow in ParseTypeFromDWARF. Then, we could simply replace this
|
|
// return statement with a call to llvm_unreachable.
|
|
return UpdateSymbolContextScopeForType(sc, die, type_sp);
|
|
}
|
|
|
|
static std::optional<uint32_t>
|
|
ExtractDataMemberLocation(DWARFDIE const &die, DWARFFormValue const &form_value,
|
|
ModuleSP module_sp) {
|
|
// With DWARF 3 and later, if the value is an integer constant,
|
|
// this form value is the offset in bytes from the beginning of
|
|
// the containing entity.
|
|
if (!form_value.BlockData())
|
|
return form_value.Unsigned();
|
|
|
|
Value initialValue(0);
|
|
Value memberOffset(0);
|
|
const DWARFDataExtractor &debug_info_data = die.GetData();
|
|
uint32_t block_length = form_value.Unsigned();
|
|
uint32_t block_offset =
|
|
form_value.BlockData() - debug_info_data.GetDataStart();
|
|
if (!DWARFExpression::Evaluate(
|
|
nullptr, // ExecutionContext *
|
|
nullptr, // RegisterContext *
|
|
module_sp, DataExtractor(debug_info_data, block_offset, block_length),
|
|
die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, memberOffset,
|
|
nullptr)) {
|
|
return {};
|
|
}
|
|
|
|
return memberOffset.ResolveValue(nullptr).UInt();
|
|
}
|
|
|
|
lldb::TypeSP
|
|
DWARFASTParserClang::ParseTypeModifier(const SymbolContext &sc,
|
|
const DWARFDIE &die,
|
|
ParsedDWARFTypeAttributes &attrs) {
|
|
Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
const dw_tag_t tag = die.Tag();
|
|
LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU());
|
|
Type::ResolveState resolve_state = Type::ResolveState::Unresolved;
|
|
Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
|
|
TypeSP type_sp;
|
|
CompilerType clang_type;
|
|
|
|
if (tag == DW_TAG_typedef) {
|
|
// DeclContext will be populated when the clang type is materialized in
|
|
// Type::ResolveCompilerType.
|
|
PrepareContextToReceiveMembers(
|
|
m_ast, GetClangASTImporter(),
|
|
GetClangDeclContextContainingDIE(die, nullptr), die,
|
|
attrs.name.GetCString());
|
|
|
|
if (attrs.type.IsValid()) {
|
|
// Try to parse a typedef from the (DWARF embedded in the) Clang
|
|
// module file first as modules can contain typedef'ed
|
|
// structures that have no names like:
|
|
//
|
|
// typedef struct { int a; } Foo;
|
|
//
|
|
// In this case we will have a structure with no name and a
|
|
// typedef named "Foo" that points to this unnamed
|
|
// structure. The name in the typedef is the only identifier for
|
|
// the struct, so always try to get typedefs from Clang modules
|
|
// if possible.
|
|
//
|
|
// The type_sp returned will be empty if the typedef doesn't
|
|
// exist in a module file, so it is cheap to call this function
|
|
// just to check.
|
|
//
|
|
// If we don't do this we end up creating a TypeSP that says
|
|
// this is a typedef to type 0x123 (the DW_AT_type value would
|
|
// be 0x123 in the DW_TAG_typedef), and this is the unnamed
|
|
// structure type. We will have a hard time tracking down an
|
|
// unnammed structure type in the module debug info, so we make
|
|
// sure we don't get into this situation by always resolving
|
|
// typedefs from the module.
|
|
const DWARFDIE encoding_die = attrs.type.Reference();
|
|
|
|
// First make sure that the die that this is typedef'ed to _is_
|
|
// just a declaration (DW_AT_declaration == 1), not a full
|
|
// definition since template types can't be represented in
|
|
// modules since only concrete instances of templates are ever
|
|
// emitted and modules won't contain those
|
|
if (encoding_die &&
|
|
encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) {
|
|
type_sp = ParseTypeFromClangModule(sc, die, log);
|
|
if (type_sp)
|
|
return type_sp;
|
|
}
|
|
}
|
|
}
|
|
|
|
DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", die.GetID(),
|
|
DW_TAG_value_to_name(tag), type_name_cstr,
|
|
encoding_uid.Reference());
|
|
|
|
switch (tag) {
|
|
default:
|
|
break;
|
|
|
|
case DW_TAG_unspecified_type:
|
|
if (attrs.name == "nullptr_t" || attrs.name == "decltype(nullptr)") {
|
|
resolve_state = Type::ResolveState::Full;
|
|
clang_type = m_ast.GetBasicType(eBasicTypeNullPtr);
|
|
break;
|
|
}
|
|
// Fall through to base type below in case we can handle the type
|
|
// there...
|
|
[[fallthrough]];
|
|
|
|
case DW_TAG_base_type:
|
|
resolve_state = Type::ResolveState::Full;
|
|
clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize(
|
|
attrs.name.GetStringRef(), attrs.encoding,
|
|
attrs.byte_size.value_or(0) * 8);
|
|
break;
|
|
|
|
case DW_TAG_pointer_type:
|
|
encoding_data_type = Type::eEncodingIsPointerUID;
|
|
break;
|
|
case DW_TAG_reference_type:
|
|
encoding_data_type = Type::eEncodingIsLValueReferenceUID;
|
|
break;
|
|
case DW_TAG_rvalue_reference_type:
|
|
encoding_data_type = Type::eEncodingIsRValueReferenceUID;
|
|
break;
|
|
case DW_TAG_typedef:
|
|
encoding_data_type = Type::eEncodingIsTypedefUID;
|
|
break;
|
|
case DW_TAG_const_type:
|
|
encoding_data_type = Type::eEncodingIsConstUID;
|
|
break;
|
|
case DW_TAG_restrict_type:
|
|
encoding_data_type = Type::eEncodingIsRestrictUID;
|
|
break;
|
|
case DW_TAG_volatile_type:
|
|
encoding_data_type = Type::eEncodingIsVolatileUID;
|
|
break;
|
|
case DW_TAG_atomic_type:
|
|
encoding_data_type = Type::eEncodingIsAtomicUID;
|
|
break;
|
|
}
|
|
|
|
if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID ||
|
|
encoding_data_type == Type::eEncodingIsTypedefUID)) {
|
|
if (tag == DW_TAG_pointer_type) {
|
|
DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type);
|
|
|
|
if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) {
|
|
// Blocks have a __FuncPtr inside them which is a pointer to a
|
|
// function of the proper type.
|
|
|
|
for (DWARFDIE child_die : target_die.children()) {
|
|
if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""),
|
|
"__FuncPtr")) {
|
|
DWARFDIE function_pointer_type =
|
|
child_die.GetReferencedDIE(DW_AT_type);
|
|
|
|
if (function_pointer_type) {
|
|
DWARFDIE function_type =
|
|
function_pointer_type.GetReferencedDIE(DW_AT_type);
|
|
|
|
bool function_type_is_new_pointer;
|
|
TypeSP lldb_function_type_sp = ParseTypeFromDWARF(
|
|
sc, function_type, &function_type_is_new_pointer);
|
|
|
|
if (lldb_function_type_sp) {
|
|
clang_type = m_ast.CreateBlockPointerType(
|
|
lldb_function_type_sp->GetForwardCompilerType());
|
|
encoding_data_type = Type::eEncodingIsUID;
|
|
attrs.type.Clear();
|
|
resolve_state = Type::ResolveState::Full;
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (cu_language == eLanguageTypeObjC ||
|
|
cu_language == eLanguageTypeObjC_plus_plus) {
|
|
if (attrs.name) {
|
|
if (attrs.name == "id") {
|
|
if (log)
|
|
dwarf->GetObjectFile()->GetModule()->LogMessage(
|
|
log,
|
|
"SymbolFileDWARF::ParseType (die = {0:x16}) {1} '{2}' "
|
|
"is Objective-C 'id' built-in type.",
|
|
die.GetOffset(), die.GetTagAsCString(), die.GetName());
|
|
clang_type = m_ast.GetBasicType(eBasicTypeObjCID);
|
|
encoding_data_type = Type::eEncodingIsUID;
|
|
attrs.type.Clear();
|
|
resolve_state = Type::ResolveState::Full;
|
|
} else if (attrs.name == "Class") {
|
|
if (log)
|
|
dwarf->GetObjectFile()->GetModule()->LogMessage(
|
|
log,
|
|
"SymbolFileDWARF::ParseType (die = {0:x16}) {1} '{2}' "
|
|
"is Objective-C 'Class' built-in type.",
|
|
die.GetOffset(), die.GetTagAsCString(), die.GetName());
|
|
clang_type = m_ast.GetBasicType(eBasicTypeObjCClass);
|
|
encoding_data_type = Type::eEncodingIsUID;
|
|
attrs.type.Clear();
|
|
resolve_state = Type::ResolveState::Full;
|
|
} else if (attrs.name == "SEL") {
|
|
if (log)
|
|
dwarf->GetObjectFile()->GetModule()->LogMessage(
|
|
log,
|
|
"SymbolFileDWARF::ParseType (die = {0:x16}) {1} '{2}' "
|
|
"is Objective-C 'selector' built-in type.",
|
|
die.GetOffset(), die.GetTagAsCString(), die.GetName());
|
|
clang_type = m_ast.GetBasicType(eBasicTypeObjCSel);
|
|
encoding_data_type = Type::eEncodingIsUID;
|
|
attrs.type.Clear();
|
|
resolve_state = Type::ResolveState::Full;
|
|
}
|
|
} else if (encoding_data_type == Type::eEncodingIsPointerUID &&
|
|
attrs.type.IsValid()) {
|
|
// Clang sometimes erroneously emits id as objc_object*. In that
|
|
// case we fix up the type to "id".
|
|
|
|
const DWARFDIE encoding_die = attrs.type.Reference();
|
|
|
|
if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) {
|
|
llvm::StringRef struct_name = encoding_die.GetName();
|
|
if (struct_name == "objc_object") {
|
|
if (log)
|
|
dwarf->GetObjectFile()->GetModule()->LogMessage(
|
|
log,
|
|
"SymbolFileDWARF::ParseType (die = {0:x16}) {1} "
|
|
"'{2}' is 'objc_object*', which we overrode to "
|
|
"'id'.",
|
|
die.GetOffset(), die.GetTagAsCString(), die.GetName());
|
|
clang_type = m_ast.GetBasicType(eBasicTypeObjCID);
|
|
encoding_data_type = Type::eEncodingIsUID;
|
|
attrs.type.Clear();
|
|
resolve_state = Type::ResolveState::Full;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
type_sp = dwarf->MakeType(die.GetID(), attrs.name, attrs.byte_size, nullptr,
|
|
attrs.type.Reference().GetID(), encoding_data_type,
|
|
&attrs.decl, clang_type, resolve_state,
|
|
TypePayloadClang(GetOwningClangModule(die)));
|
|
|
|
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
|
|
return type_sp;
|
|
}
|
|
|
|
ConstString
|
|
DWARFASTParserClang::GetDIEClassTemplateParams(const DWARFDIE &die) {
|
|
if (llvm::StringRef(die.GetName()).contains("<"))
|
|
return ConstString();
|
|
|
|
TypeSystemClang::TemplateParameterInfos template_param_infos;
|
|
if (ParseTemplateParameterInfos(die, template_param_infos)) {
|
|
return ConstString(m_ast.PrintTemplateParams(template_param_infos));
|
|
}
|
|
return ConstString();
|
|
}
|
|
|
|
TypeSP DWARFASTParserClang::ParseEnum(const SymbolContext &sc,
|
|
const DWARFDIE &die,
|
|
ParsedDWARFTypeAttributes &attrs) {
|
|
Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
const dw_tag_t tag = die.Tag();
|
|
TypeSP type_sp;
|
|
|
|
if (attrs.is_forward_declaration) {
|
|
type_sp = ParseTypeFromClangModule(sc, die, log);
|
|
if (type_sp)
|
|
return type_sp;
|
|
|
|
type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die);
|
|
|
|
if (!type_sp) {
|
|
SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile();
|
|
if (debug_map_symfile) {
|
|
// We weren't able to find a full declaration in this DWARF,
|
|
// see if we have a declaration anywhere else...
|
|
type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext(die);
|
|
}
|
|
}
|
|
|
|
if (type_sp) {
|
|
if (log) {
|
|
dwarf->GetObjectFile()->GetModule()->LogMessage(
|
|
log,
|
|
"SymbolFileDWARF({0:p}) - {1:x16}}: {2} type \"{3}\" is a "
|
|
"forward declaration, complete type is {4:x8}",
|
|
static_cast<void *>(this), die.GetOffset(),
|
|
DW_TAG_value_to_name(tag), attrs.name.GetCString(),
|
|
type_sp->GetID());
|
|
}
|
|
|
|
// We found a real definition for this type elsewhere so lets use
|
|
// it and cache the fact that we found a complete type for this
|
|
// die
|
|
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
|
|
clang::DeclContext *defn_decl_ctx =
|
|
GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID()));
|
|
if (defn_decl_ctx)
|
|
LinkDeclContextToDIE(defn_decl_ctx, die);
|
|
return type_sp;
|
|
}
|
|
}
|
|
DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
|
|
DW_TAG_value_to_name(tag), type_name_cstr);
|
|
|
|
CompilerType enumerator_clang_type;
|
|
CompilerType clang_type;
|
|
clang_type = CompilerType(
|
|
m_ast.weak_from_this(),
|
|
dwarf->GetForwardDeclDIEToCompilerType().lookup(die.GetDIE()));
|
|
if (!clang_type) {
|
|
if (attrs.type.IsValid()) {
|
|
Type *enumerator_type =
|
|
dwarf->ResolveTypeUID(attrs.type.Reference(), true);
|
|
if (enumerator_type)
|
|
enumerator_clang_type = enumerator_type->GetFullCompilerType();
|
|
}
|
|
|
|
if (!enumerator_clang_type) {
|
|
if (attrs.byte_size) {
|
|
enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize(
|
|
"", DW_ATE_signed, *attrs.byte_size * 8);
|
|
} else {
|
|
enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt);
|
|
}
|
|
}
|
|
|
|
clang_type = m_ast.CreateEnumerationType(
|
|
attrs.name.GetStringRef(),
|
|
GetClangDeclContextContainingDIE(die, nullptr),
|
|
GetOwningClangModule(die), attrs.decl, enumerator_clang_type,
|
|
attrs.is_scoped_enum);
|
|
} else {
|
|
enumerator_clang_type = m_ast.GetEnumerationIntegerType(clang_type);
|
|
}
|
|
|
|
LinkDeclContextToDIE(TypeSystemClang::GetDeclContextForType(clang_type), die);
|
|
|
|
type_sp =
|
|
dwarf->MakeType(die.GetID(), attrs.name, attrs.byte_size, nullptr,
|
|
attrs.type.Reference().GetID(), Type::eEncodingIsUID,
|
|
&attrs.decl, clang_type, Type::ResolveState::Forward,
|
|
TypePayloadClang(GetOwningClangModule(die)));
|
|
|
|
if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) {
|
|
if (die.HasChildren()) {
|
|
bool is_signed = false;
|
|
enumerator_clang_type.IsIntegerType(is_signed);
|
|
ParseChildEnumerators(clang_type, is_signed,
|
|
type_sp->GetByteSize(nullptr).value_or(0), die);
|
|
}
|
|
TypeSystemClang::CompleteTagDeclarationDefinition(clang_type);
|
|
} else {
|
|
dwarf->GetObjectFile()->GetModule()->ReportError(
|
|
"DWARF DIE at {0:x16} named \"{1}\" was not able to start its "
|
|
"definition.\nPlease file a bug and attach the file at the "
|
|
"start of this error message",
|
|
die.GetOffset(), attrs.name.GetCString());
|
|
}
|
|
return type_sp;
|
|
}
|
|
|
|
static clang::CallingConv
|
|
ConvertDWARFCallingConventionToClang(const ParsedDWARFTypeAttributes &attrs) {
|
|
switch (attrs.calling_convention) {
|
|
case llvm::dwarf::DW_CC_normal:
|
|
return clang::CC_C;
|
|
case llvm::dwarf::DW_CC_BORLAND_stdcall:
|
|
return clang::CC_X86StdCall;
|
|
case llvm::dwarf::DW_CC_BORLAND_msfastcall:
|
|
return clang::CC_X86FastCall;
|
|
case llvm::dwarf::DW_CC_LLVM_vectorcall:
|
|
return clang::CC_X86VectorCall;
|
|
case llvm::dwarf::DW_CC_BORLAND_pascal:
|
|
return clang::CC_X86Pascal;
|
|
case llvm::dwarf::DW_CC_LLVM_Win64:
|
|
return clang::CC_Win64;
|
|
case llvm::dwarf::DW_CC_LLVM_X86_64SysV:
|
|
return clang::CC_X86_64SysV;
|
|
case llvm::dwarf::DW_CC_LLVM_X86RegCall:
|
|
return clang::CC_X86RegCall;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
|
|
LLDB_LOG(log, "Unsupported DW_AT_calling_convention value: {0}",
|
|
attrs.calling_convention);
|
|
// Use the default calling convention as a fallback.
|
|
return clang::CC_C;
|
|
}
|
|
|
|
TypeSP DWARFASTParserClang::ParseSubroutine(const DWARFDIE &die,
|
|
ParsedDWARFTypeAttributes &attrs) {
|
|
Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
|
|
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
const dw_tag_t tag = die.Tag();
|
|
|
|
bool is_variadic = false;
|
|
bool is_static = false;
|
|
bool has_template_params = false;
|
|
|
|
unsigned type_quals = 0;
|
|
|
|
std::string object_pointer_name;
|
|
if (attrs.object_pointer) {
|
|
const char *object_pointer_name_cstr = attrs.object_pointer.GetName();
|
|
if (object_pointer_name_cstr)
|
|
object_pointer_name = object_pointer_name_cstr;
|
|
}
|
|
|
|
DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
|
|
DW_TAG_value_to_name(tag), type_name_cstr);
|
|
|
|
CompilerType return_clang_type;
|
|
Type *func_type = nullptr;
|
|
|
|
if (attrs.type.IsValid())
|
|
func_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true);
|
|
|
|
if (func_type)
|
|
return_clang_type = func_type->GetForwardCompilerType();
|
|
else
|
|
return_clang_type = m_ast.GetBasicType(eBasicTypeVoid);
|
|
|
|
std::vector<CompilerType> function_param_types;
|
|
std::vector<clang::ParmVarDecl *> function_param_decls;
|
|
|
|
// Parse the function children for the parameters
|
|
|
|
DWARFDIE decl_ctx_die;
|
|
clang::DeclContext *containing_decl_ctx =
|
|
GetClangDeclContextContainingDIE(die, &decl_ctx_die);
|
|
const clang::Decl::Kind containing_decl_kind =
|
|
containing_decl_ctx->getDeclKind();
|
|
|
|
bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind);
|
|
// Start off static. This will be set to false in
|
|
// ParseChildParameters(...) if we find a "this" parameters as the
|
|
// first parameter
|
|
if (is_cxx_method) {
|
|
is_static = true;
|
|
}
|
|
|
|
if (die.HasChildren()) {
|
|
bool skip_artificial = true;
|
|
ParseChildParameters(containing_decl_ctx, die, skip_artificial, is_static,
|
|
is_variadic, has_template_params,
|
|
function_param_types, function_param_decls,
|
|
type_quals);
|
|
}
|
|
|
|
bool ignore_containing_context = false;
|
|
// Check for templatized class member functions. If we had any
|
|
// DW_TAG_template_type_parameter or DW_TAG_template_value_parameter
|
|
// the DW_TAG_subprogram DIE, then we can't let this become a method in
|
|
// a class. Why? Because templatized functions are only emitted if one
|
|
// of the templatized methods is used in the current compile unit and
|
|
// we will end up with classes that may or may not include these member
|
|
// functions and this means one class won't match another class
|
|
// definition and it affects our ability to use a class in the clang
|
|
// expression parser. So for the greater good, we currently must not
|
|
// allow any template member functions in a class definition.
|
|
if (is_cxx_method && has_template_params) {
|
|
ignore_containing_context = true;
|
|
is_cxx_method = false;
|
|
}
|
|
|
|
clang::CallingConv calling_convention =
|
|
ConvertDWARFCallingConventionToClang(attrs);
|
|
|
|
// clang_type will get the function prototype clang type after this
|
|
// call
|
|
CompilerType clang_type =
|
|
m_ast.CreateFunctionType(return_clang_type, function_param_types.data(),
|
|
function_param_types.size(), is_variadic,
|
|
type_quals, calling_convention, attrs.ref_qual);
|
|
|
|
if (attrs.name) {
|
|
bool type_handled = false;
|
|
if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) {
|
|
std::optional<const ObjCLanguage::MethodName> objc_method =
|
|
ObjCLanguage::MethodName::Create(attrs.name.GetStringRef(), true);
|
|
if (objc_method) {
|
|
CompilerType class_opaque_type;
|
|
ConstString class_name(objc_method->GetClassName());
|
|
if (class_name) {
|
|
TypeSP complete_objc_class_type_sp(
|
|
dwarf->FindCompleteObjCDefinitionTypeForDIE(DWARFDIE(),
|
|
class_name, false));
|
|
|
|
if (complete_objc_class_type_sp) {
|
|
CompilerType type_clang_forward_type =
|
|
complete_objc_class_type_sp->GetForwardCompilerType();
|
|
if (TypeSystemClang::IsObjCObjectOrInterfaceType(
|
|
type_clang_forward_type))
|
|
class_opaque_type = type_clang_forward_type;
|
|
}
|
|
}
|
|
|
|
if (class_opaque_type) {
|
|
// If accessibility isn't set to anything valid, assume public
|
|
// for now...
|
|
if (attrs.accessibility == eAccessNone)
|
|
attrs.accessibility = eAccessPublic;
|
|
|
|
clang::ObjCMethodDecl *objc_method_decl =
|
|
m_ast.AddMethodToObjCObjectType(
|
|
class_opaque_type, attrs.name.GetCString(), clang_type,
|
|
attrs.accessibility, attrs.is_artificial, is_variadic,
|
|
attrs.is_objc_direct_call);
|
|
type_handled = objc_method_decl != nullptr;
|
|
if (type_handled) {
|
|
LinkDeclContextToDIE(objc_method_decl, die);
|
|
m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID());
|
|
} else {
|
|
dwarf->GetObjectFile()->GetModule()->ReportError(
|
|
"[{0:x16}]: invalid Objective-C method {1:x4} ({2}), "
|
|
"please file a bug and attach the file at the start of "
|
|
"this error message",
|
|
die.GetOffset(), tag, DW_TAG_value_to_name(tag));
|
|
}
|
|
}
|
|
} else if (is_cxx_method) {
|
|
// Look at the parent of this DIE and see if it is a class or
|
|
// struct and see if this is actually a C++ method
|
|
Type *class_type = dwarf->ResolveType(decl_ctx_die);
|
|
if (class_type) {
|
|
if (class_type->GetID() != decl_ctx_die.GetID() ||
|
|
IsClangModuleFwdDecl(decl_ctx_die)) {
|
|
|
|
// We uniqued the parent class of this function to another
|
|
// class so we now need to associate all dies under
|
|
// "decl_ctx_die" to DIEs in the DIE for "class_type"...
|
|
DWARFDIE class_type_die = dwarf->GetDIE(class_type->GetID());
|
|
|
|
if (class_type_die) {
|
|
std::vector<DWARFDIE> failures;
|
|
|
|
CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die,
|
|
class_type, failures);
|
|
|
|
// FIXME do something with these failures that's
|
|
// smarter than just dropping them on the ground.
|
|
// Unfortunately classes don't like having stuff added
|
|
// to them after their definitions are complete...
|
|
|
|
Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()];
|
|
if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) {
|
|
return type_ptr->shared_from_this();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (attrs.specification.IsValid()) {
|
|
// We have a specification which we are going to base our
|
|
// function prototype off of, so we need this type to be
|
|
// completed so that the m_die_to_decl_ctx for the method in
|
|
// the specification has a valid clang decl context.
|
|
class_type->GetForwardCompilerType();
|
|
// If we have a specification, then the function type should
|
|
// have been made with the specification and not with this
|
|
// die.
|
|
DWARFDIE spec_die = attrs.specification.Reference();
|
|
clang::DeclContext *spec_clang_decl_ctx =
|
|
GetClangDeclContextForDIE(spec_die);
|
|
if (spec_clang_decl_ctx) {
|
|
LinkDeclContextToDIE(spec_clang_decl_ctx, die);
|
|
} else {
|
|
dwarf->GetObjectFile()->GetModule()->ReportWarning(
|
|
"{0:x8}: DW_AT_specification({1:x16}"
|
|
") has no decl\n",
|
|
die.GetID(), spec_die.GetOffset());
|
|
}
|
|
type_handled = true;
|
|
} else if (attrs.abstract_origin.IsValid()) {
|
|
// We have a specification which we are going to base our
|
|
// function prototype off of, so we need this type to be
|
|
// completed so that the m_die_to_decl_ctx for the method in
|
|
// the abstract origin has a valid clang decl context.
|
|
class_type->GetForwardCompilerType();
|
|
|
|
DWARFDIE abs_die = attrs.abstract_origin.Reference();
|
|
clang::DeclContext *abs_clang_decl_ctx =
|
|
GetClangDeclContextForDIE(abs_die);
|
|
if (abs_clang_decl_ctx) {
|
|
LinkDeclContextToDIE(abs_clang_decl_ctx, die);
|
|
} else {
|
|
dwarf->GetObjectFile()->GetModule()->ReportWarning(
|
|
"{0:x8}: DW_AT_abstract_origin({1:x16}"
|
|
") has no decl\n",
|
|
die.GetID(), abs_die.GetOffset());
|
|
}
|
|
type_handled = true;
|
|
} else {
|
|
CompilerType class_opaque_type =
|
|
class_type->GetForwardCompilerType();
|
|
if (TypeSystemClang::IsCXXClassType(class_opaque_type)) {
|
|
if (class_opaque_type.IsBeingDefined()) {
|
|
if (!is_static && !die.HasChildren()) {
|
|
// We have a C++ member function with no children (this
|
|
// pointer!) and clang will get mad if we try and make
|
|
// a function that isn't well formed in the DWARF, so
|
|
// we will just skip it...
|
|
type_handled = true;
|
|
} else {
|
|
llvm::PrettyStackTraceFormat stack_trace(
|
|
"SymbolFileDWARF::ParseType() is adding a method "
|
|
"%s to class %s in DIE 0x%8.8" PRIx64 " from %s",
|
|
attrs.name.GetCString(),
|
|
class_type->GetName().GetCString(), die.GetID(),
|
|
dwarf->GetObjectFile()->GetFileSpec().GetPath().c_str());
|
|
|
|
const bool is_attr_used = false;
|
|
// Neither GCC 4.2 nor clang++ currently set a valid
|
|
// accessibility in the DWARF for C++ methods...
|
|
// Default to public for now...
|
|
if (attrs.accessibility == eAccessNone)
|
|
attrs.accessibility = eAccessPublic;
|
|
|
|
clang::CXXMethodDecl *cxx_method_decl =
|
|
m_ast.AddMethodToCXXRecordType(
|
|
class_opaque_type.GetOpaqueQualType(),
|
|
attrs.name.GetCString(), attrs.mangled_name,
|
|
clang_type, attrs.accessibility, attrs.is_virtual,
|
|
is_static, attrs.is_inline, attrs.is_explicit,
|
|
is_attr_used, attrs.is_artificial);
|
|
|
|
type_handled = cxx_method_decl != nullptr;
|
|
// Artificial methods are always handled even when we
|
|
// don't create a new declaration for them.
|
|
type_handled |= attrs.is_artificial;
|
|
|
|
if (cxx_method_decl) {
|
|
LinkDeclContextToDIE(cxx_method_decl, die);
|
|
|
|
ClangASTMetadata metadata;
|
|
metadata.SetUserID(die.GetID());
|
|
|
|
if (!object_pointer_name.empty()) {
|
|
metadata.SetObjectPtrName(object_pointer_name.c_str());
|
|
LLDB_LOGF(log,
|
|
"Setting object pointer name: %s on method "
|
|
"object %p.\n",
|
|
object_pointer_name.c_str(),
|
|
static_cast<void *>(cxx_method_decl));
|
|
}
|
|
m_ast.SetMetadata(cxx_method_decl, metadata);
|
|
} else {
|
|
ignore_containing_context = true;
|
|
}
|
|
}
|
|
} else {
|
|
// We were asked to parse the type for a method in a
|
|
// class, yet the class hasn't been asked to complete
|
|
// itself through the clang::ExternalASTSource protocol,
|
|
// so we need to just have the class complete itself and
|
|
// do things the right way, then our
|
|
// DIE should then have an entry in the
|
|
// dwarf->GetDIEToType() map. First
|
|
// we need to modify the dwarf->GetDIEToType() so it
|
|
// doesn't think we are trying to parse this DIE
|
|
// anymore...
|
|
dwarf->GetDIEToType()[die.GetDIE()] = NULL;
|
|
|
|
// Now we get the full type to force our class type to
|
|
// complete itself using the clang::ExternalASTSource
|
|
// protocol which will parse all base classes and all
|
|
// methods (including the method for this DIE).
|
|
class_type->GetFullCompilerType();
|
|
|
|
// The type for this DIE should have been filled in the
|
|
// function call above.
|
|
Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()];
|
|
if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) {
|
|
return type_ptr->shared_from_this();
|
|
}
|
|
|
|
// The previous comment isn't actually true if the class wasn't
|
|
// resolved using the current method's parent DIE as source
|
|
// data. We need to ensure that we look up the method correctly
|
|
// in the class and then link the method's DIE to the unique
|
|
// CXXMethodDecl appropriately.
|
|
type_handled = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!type_handled) {
|
|
clang::FunctionDecl *function_decl = nullptr;
|
|
clang::FunctionDecl *template_function_decl = nullptr;
|
|
|
|
if (attrs.abstract_origin.IsValid()) {
|
|
DWARFDIE abs_die = attrs.abstract_origin.Reference();
|
|
|
|
if (dwarf->ResolveType(abs_die)) {
|
|
function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>(
|
|
GetCachedClangDeclContextForDIE(abs_die));
|
|
|
|
if (function_decl) {
|
|
LinkDeclContextToDIE(function_decl, die);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!function_decl) {
|
|
char *name_buf = nullptr;
|
|
llvm::StringRef name = attrs.name.GetStringRef();
|
|
|
|
// We currently generate function templates with template parameters in
|
|
// their name. In order to get closer to the AST that clang generates
|
|
// we want to strip these from the name when creating the AST.
|
|
if (attrs.mangled_name) {
|
|
llvm::ItaniumPartialDemangler D;
|
|
if (!D.partialDemangle(attrs.mangled_name)) {
|
|
name_buf = D.getFunctionBaseName(nullptr, nullptr);
|
|
name = name_buf;
|
|
}
|
|
}
|
|
|
|
// We just have a function that isn't part of a class
|
|
function_decl = m_ast.CreateFunctionDeclaration(
|
|
ignore_containing_context ? m_ast.GetTranslationUnitDecl()
|
|
: containing_decl_ctx,
|
|
GetOwningClangModule(die), name, clang_type, attrs.storage,
|
|
attrs.is_inline);
|
|
std::free(name_buf);
|
|
|
|
if (has_template_params) {
|
|
TypeSystemClang::TemplateParameterInfos template_param_infos;
|
|
ParseTemplateParameterInfos(die, template_param_infos);
|
|
template_function_decl = m_ast.CreateFunctionDeclaration(
|
|
ignore_containing_context ? m_ast.GetTranslationUnitDecl()
|
|
: containing_decl_ctx,
|
|
GetOwningClangModule(die), attrs.name.GetStringRef(), clang_type,
|
|
attrs.storage, attrs.is_inline);
|
|
clang::FunctionTemplateDecl *func_template_decl =
|
|
m_ast.CreateFunctionTemplateDecl(
|
|
containing_decl_ctx, GetOwningClangModule(die),
|
|
template_function_decl, template_param_infos);
|
|
m_ast.CreateFunctionTemplateSpecializationInfo(
|
|
template_function_decl, func_template_decl, template_param_infos);
|
|
}
|
|
|
|
lldbassert(function_decl);
|
|
|
|
if (function_decl) {
|
|
// Attach an asm(<mangled_name>) label to the FunctionDecl.
|
|
// This ensures that clang::CodeGen emits function calls
|
|
// using symbols that are mangled according to the DW_AT_linkage_name.
|
|
// If we didn't do this, the external symbols wouldn't exactly
|
|
// match the mangled name LLDB knows about and the IRExecutionUnit
|
|
// would have to fall back to searching object files for
|
|
// approximately matching function names. The motivating
|
|
// example is generating calls to ABI-tagged template functions.
|
|
// This is done separately for member functions in
|
|
// AddMethodToCXXRecordType.
|
|
if (attrs.mangled_name)
|
|
function_decl->addAttr(clang::AsmLabelAttr::CreateImplicit(
|
|
m_ast.getASTContext(), attrs.mangled_name, /*literal=*/false));
|
|
|
|
LinkDeclContextToDIE(function_decl, die);
|
|
|
|
if (!function_param_decls.empty()) {
|
|
m_ast.SetFunctionParameters(function_decl, function_param_decls);
|
|
if (template_function_decl)
|
|
m_ast.SetFunctionParameters(template_function_decl,
|
|
function_param_decls);
|
|
}
|
|
|
|
ClangASTMetadata metadata;
|
|
metadata.SetUserID(die.GetID());
|
|
|
|
if (!object_pointer_name.empty()) {
|
|
metadata.SetObjectPtrName(object_pointer_name.c_str());
|
|
LLDB_LOGF(log,
|
|
"Setting object pointer name: %s on function "
|
|
"object %p.",
|
|
object_pointer_name.c_str(),
|
|
static_cast<void *>(function_decl));
|
|
}
|
|
m_ast.SetMetadata(function_decl, metadata);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return dwarf->MakeType(
|
|
die.GetID(), attrs.name, std::nullopt, nullptr, LLDB_INVALID_UID,
|
|
Type::eEncodingIsUID, &attrs.decl, clang_type, Type::ResolveState::Full);
|
|
}
|
|
|
|
TypeSP
|
|
DWARFASTParserClang::ParseArrayType(const DWARFDIE &die,
|
|
const ParsedDWARFTypeAttributes &attrs) {
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
|
|
DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
|
|
DW_TAG_value_to_name(tag), type_name_cstr);
|
|
|
|
DWARFDIE type_die = attrs.type.Reference();
|
|
Type *element_type = dwarf->ResolveTypeUID(type_die, true);
|
|
|
|
if (!element_type)
|
|
return nullptr;
|
|
|
|
std::optional<SymbolFile::ArrayInfo> array_info = ParseChildArrayInfo(die);
|
|
uint32_t byte_stride = attrs.byte_stride;
|
|
uint32_t bit_stride = attrs.bit_stride;
|
|
if (array_info) {
|
|
byte_stride = array_info->byte_stride;
|
|
bit_stride = array_info->bit_stride;
|
|
}
|
|
if (byte_stride == 0 && bit_stride == 0)
|
|
byte_stride = element_type->GetByteSize(nullptr).value_or(0);
|
|
CompilerType array_element_type = element_type->GetForwardCompilerType();
|
|
TypeSystemClang::RequireCompleteType(array_element_type);
|
|
|
|
uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
|
|
CompilerType clang_type;
|
|
if (array_info && array_info->element_orders.size() > 0) {
|
|
uint64_t num_elements = 0;
|
|
auto end = array_info->element_orders.rend();
|
|
for (auto pos = array_info->element_orders.rbegin(); pos != end; ++pos) {
|
|
num_elements = *pos;
|
|
clang_type = m_ast.CreateArrayType(array_element_type, num_elements,
|
|
attrs.is_vector);
|
|
array_element_type = clang_type;
|
|
array_element_bit_stride = num_elements
|
|
? array_element_bit_stride * num_elements
|
|
: array_element_bit_stride;
|
|
}
|
|
} else {
|
|
clang_type =
|
|
m_ast.CreateArrayType(array_element_type, 0, attrs.is_vector);
|
|
}
|
|
ConstString empty_name;
|
|
TypeSP type_sp =
|
|
dwarf->MakeType(die.GetID(), empty_name, array_element_bit_stride / 8,
|
|
nullptr, type_die.GetID(), Type::eEncodingIsUID,
|
|
&attrs.decl, clang_type, Type::ResolveState::Full);
|
|
type_sp->SetEncodingType(element_type);
|
|
const clang::Type *type = ClangUtil::GetQualType(clang_type).getTypePtr();
|
|
m_ast.SetMetadataAsUserID(type, die.GetID());
|
|
return type_sp;
|
|
}
|
|
|
|
TypeSP DWARFASTParserClang::ParsePointerToMemberType(
|
|
const DWARFDIE &die, const ParsedDWARFTypeAttributes &attrs) {
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
Type *pointee_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true);
|
|
Type *class_type =
|
|
dwarf->ResolveTypeUID(attrs.containing_type.Reference(), true);
|
|
|
|
// Check to make sure pointers are not NULL before attempting to
|
|
// dereference them.
|
|
if ((class_type == nullptr) || (pointee_type == nullptr))
|
|
return nullptr;
|
|
|
|
CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType();
|
|
CompilerType class_clang_type = class_type->GetForwardCompilerType();
|
|
|
|
CompilerType clang_type = TypeSystemClang::CreateMemberPointerType(
|
|
class_clang_type, pointee_clang_type);
|
|
|
|
if (std::optional<uint64_t> clang_type_size =
|
|
clang_type.GetByteSize(nullptr)) {
|
|
return dwarf->MakeType(die.GetID(), attrs.name, *clang_type_size, nullptr,
|
|
LLDB_INVALID_UID, Type::eEncodingIsUID, nullptr,
|
|
clang_type, Type::ResolveState::Forward);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void DWARFASTParserClang::ParseInheritance(
|
|
const DWARFDIE &die, const DWARFDIE &parent_die,
|
|
const CompilerType class_clang_type, const AccessType default_accessibility,
|
|
const lldb::ModuleSP &module_sp,
|
|
std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes,
|
|
ClangASTImporter::LayoutInfo &layout_info) {
|
|
auto ast =
|
|
class_clang_type.GetTypeSystem().dyn_cast_or_null<TypeSystemClang>();
|
|
if (ast == nullptr)
|
|
return;
|
|
|
|
// TODO: implement DW_TAG_inheritance type parsing.
|
|
DWARFAttributes attributes = die.GetAttributes();
|
|
if (attributes.Size() == 0)
|
|
return;
|
|
|
|
DWARFFormValue encoding_form;
|
|
AccessType accessibility = default_accessibility;
|
|
bool is_virtual = false;
|
|
bool is_base_of_class = true;
|
|
off_t member_byte_offset = 0;
|
|
|
|
for (uint32_t i = 0; i < attributes.Size(); ++i) {
|
|
const dw_attr_t attr = attributes.AttributeAtIndex(i);
|
|
DWARFFormValue form_value;
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value)) {
|
|
switch (attr) {
|
|
case DW_AT_type:
|
|
encoding_form = form_value;
|
|
break;
|
|
case DW_AT_data_member_location:
|
|
if (auto maybe_offset =
|
|
ExtractDataMemberLocation(die, form_value, module_sp))
|
|
member_byte_offset = *maybe_offset;
|
|
break;
|
|
|
|
case DW_AT_accessibility:
|
|
accessibility =
|
|
DWARFASTParser::GetAccessTypeFromDWARF(form_value.Unsigned());
|
|
break;
|
|
|
|
case DW_AT_virtuality:
|
|
is_virtual = form_value.Boolean();
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
Type *base_class_type = die.ResolveTypeUID(encoding_form.Reference());
|
|
if (base_class_type == nullptr) {
|
|
module_sp->ReportError("{0:x16}: DW_TAG_inheritance failed to "
|
|
"resolve the base class at {1:x16}"
|
|
" from enclosing type {2:x16}. \nPlease file "
|
|
"a bug and attach the file at the start of "
|
|
"this error message",
|
|
die.GetOffset(),
|
|
encoding_form.Reference().GetOffset(),
|
|
parent_die.GetOffset());
|
|
return;
|
|
}
|
|
|
|
CompilerType base_class_clang_type = base_class_type->GetFullCompilerType();
|
|
assert(base_class_clang_type);
|
|
if (TypeSystemClang::IsObjCObjectOrInterfaceType(class_clang_type)) {
|
|
ast->SetObjCSuperClass(class_clang_type, base_class_clang_type);
|
|
return;
|
|
}
|
|
std::unique_ptr<clang::CXXBaseSpecifier> result =
|
|
ast->CreateBaseClassSpecifier(base_class_clang_type.GetOpaqueQualType(),
|
|
accessibility, is_virtual,
|
|
is_base_of_class);
|
|
if (!result)
|
|
return;
|
|
|
|
base_classes.push_back(std::move(result));
|
|
|
|
if (is_virtual) {
|
|
// Do not specify any offset for virtual inheritance. The DWARF
|
|
// produced by clang doesn't give us a constant offset, but gives
|
|
// us a DWARF expressions that requires an actual object in memory.
|
|
// the DW_AT_data_member_location for a virtual base class looks
|
|
// like:
|
|
// DW_AT_data_member_location( DW_OP_dup, DW_OP_deref,
|
|
// DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref,
|
|
// DW_OP_plus )
|
|
// Given this, there is really no valid response we can give to
|
|
// clang for virtual base class offsets, and this should eventually
|
|
// be removed from LayoutRecordType() in the external
|
|
// AST source in clang.
|
|
} else {
|
|
layout_info.base_offsets.insert(std::make_pair(
|
|
ast->GetAsCXXRecordDecl(base_class_clang_type.GetOpaqueQualType()),
|
|
clang::CharUnits::fromQuantity(member_byte_offset)));
|
|
}
|
|
}
|
|
|
|
TypeSP DWARFASTParserClang::UpdateSymbolContextScopeForType(
|
|
const SymbolContext &sc, const DWARFDIE &die, TypeSP type_sp) {
|
|
if (!type_sp)
|
|
return type_sp;
|
|
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die);
|
|
dw_tag_t sc_parent_tag = sc_parent_die.Tag();
|
|
|
|
SymbolContextScope *symbol_context_scope = nullptr;
|
|
if (sc_parent_tag == DW_TAG_compile_unit ||
|
|
sc_parent_tag == DW_TAG_partial_unit) {
|
|
symbol_context_scope = sc.comp_unit;
|
|
} else if (sc.function != nullptr && sc_parent_die) {
|
|
symbol_context_scope =
|
|
sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID());
|
|
if (symbol_context_scope == nullptr)
|
|
symbol_context_scope = sc.function;
|
|
} else {
|
|
symbol_context_scope = sc.module_sp.get();
|
|
}
|
|
|
|
if (symbol_context_scope != nullptr)
|
|
type_sp->SetSymbolContextScope(symbol_context_scope);
|
|
|
|
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
|
|
return type_sp;
|
|
}
|
|
|
|
std::string
|
|
DWARFASTParserClang::GetCPlusPlusQualifiedName(const DWARFDIE &die) {
|
|
if (!die.IsValid())
|
|
return "";
|
|
const char *name = die.GetName();
|
|
if (!name)
|
|
return "";
|
|
std::string qualified_name;
|
|
DWARFDIE parent_decl_ctx_die = die.GetParentDeclContextDIE();
|
|
// TODO: change this to get the correct decl context parent....
|
|
while (parent_decl_ctx_die) {
|
|
// The name may not contain template parameters due to
|
|
// -gsimple-template-names; we must reconstruct the full name from child
|
|
// template parameter dies via GetDIEClassTemplateParams().
|
|
const dw_tag_t parent_tag = parent_decl_ctx_die.Tag();
|
|
switch (parent_tag) {
|
|
case DW_TAG_namespace: {
|
|
if (const char *namespace_name = parent_decl_ctx_die.GetName()) {
|
|
qualified_name.insert(0, "::");
|
|
qualified_name.insert(0, namespace_name);
|
|
} else {
|
|
qualified_name.insert(0, "(anonymous namespace)::");
|
|
}
|
|
parent_decl_ctx_die = parent_decl_ctx_die.GetParentDeclContextDIE();
|
|
break;
|
|
}
|
|
|
|
case DW_TAG_class_type:
|
|
case DW_TAG_structure_type:
|
|
case DW_TAG_union_type: {
|
|
if (const char *class_union_struct_name = parent_decl_ctx_die.GetName()) {
|
|
qualified_name.insert(
|
|
0, GetDIEClassTemplateParams(parent_decl_ctx_die).AsCString(""));
|
|
qualified_name.insert(0, "::");
|
|
qualified_name.insert(0, class_union_struct_name);
|
|
}
|
|
parent_decl_ctx_die = parent_decl_ctx_die.GetParentDeclContextDIE();
|
|
break;
|
|
}
|
|
|
|
default:
|
|
parent_decl_ctx_die.Clear();
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (qualified_name.empty())
|
|
qualified_name.append("::");
|
|
|
|
qualified_name.append(name);
|
|
qualified_name.append(GetDIEClassTemplateParams(die).AsCString(""));
|
|
|
|
return qualified_name;
|
|
}
|
|
|
|
TypeSP
|
|
DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
|
|
const DWARFDIE &die,
|
|
ParsedDWARFTypeAttributes &attrs) {
|
|
TypeSP type_sp;
|
|
CompilerType clang_type;
|
|
const dw_tag_t tag = die.Tag();
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU());
|
|
Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
|
|
|
|
// UniqueDWARFASTType is large, so don't create a local variables on the
|
|
// stack, put it on the heap. This function is often called recursively and
|
|
// clang isn't good at sharing the stack space for variables in different
|
|
// blocks.
|
|
auto unique_ast_entry_up = std::make_unique<UniqueDWARFASTType>();
|
|
|
|
ConstString unique_typename(attrs.name);
|
|
Declaration unique_decl(attrs.decl);
|
|
|
|
if (attrs.name) {
|
|
if (Language::LanguageIsCPlusPlus(cu_language)) {
|
|
// For C++, we rely solely upon the one definition rule that says
|
|
// only one thing can exist at a given decl context. We ignore the
|
|
// file and line that things are declared on.
|
|
std::string qualified_name = GetCPlusPlusQualifiedName(die);
|
|
if (!qualified_name.empty())
|
|
unique_typename = ConstString(qualified_name);
|
|
unique_decl.Clear();
|
|
}
|
|
|
|
if (dwarf->GetUniqueDWARFASTTypeMap().Find(
|
|
unique_typename, die, unique_decl, attrs.byte_size.value_or(-1),
|
|
*unique_ast_entry_up)) {
|
|
type_sp = unique_ast_entry_up->m_type_sp;
|
|
if (type_sp) {
|
|
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
|
|
LinkDeclContextToDIE(
|
|
GetCachedClangDeclContextForDIE(unique_ast_entry_up->m_die), die);
|
|
return type_sp;
|
|
}
|
|
}
|
|
}
|
|
|
|
DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
|
|
DW_TAG_value_to_name(tag), type_name_cstr);
|
|
|
|
int tag_decl_kind = -1;
|
|
AccessType default_accessibility = eAccessNone;
|
|
if (tag == DW_TAG_structure_type) {
|
|
tag_decl_kind = llvm::to_underlying(clang::TagTypeKind::Struct);
|
|
default_accessibility = eAccessPublic;
|
|
} else if (tag == DW_TAG_union_type) {
|
|
tag_decl_kind = llvm::to_underlying(clang::TagTypeKind::Union);
|
|
default_accessibility = eAccessPublic;
|
|
} else if (tag == DW_TAG_class_type) {
|
|
tag_decl_kind = llvm::to_underlying(clang::TagTypeKind::Class);
|
|
default_accessibility = eAccessPrivate;
|
|
}
|
|
|
|
if (attrs.byte_size && *attrs.byte_size == 0 && attrs.name &&
|
|
!die.HasChildren() && cu_language == eLanguageTypeObjC) {
|
|
// Work around an issue with clang at the moment where forward
|
|
// declarations for objective C classes are emitted as:
|
|
// DW_TAG_structure_type [2]
|
|
// DW_AT_name( "ForwardObjcClass" )
|
|
// DW_AT_byte_size( 0x00 )
|
|
// DW_AT_decl_file( "..." )
|
|
// DW_AT_decl_line( 1 )
|
|
//
|
|
// Note that there is no DW_AT_declaration and there are no children,
|
|
// and the byte size is zero.
|
|
attrs.is_forward_declaration = true;
|
|
}
|
|
|
|
if (attrs.class_language == eLanguageTypeObjC ||
|
|
attrs.class_language == eLanguageTypeObjC_plus_plus) {
|
|
if (!attrs.is_complete_objc_class &&
|
|
die.Supports_DW_AT_APPLE_objc_complete_type()) {
|
|
// We have a valid eSymbolTypeObjCClass class symbol whose name
|
|
// matches the current objective C class that we are trying to find
|
|
// and this DIE isn't the complete definition (we checked
|
|
// is_complete_objc_class above and know it is false), so the real
|
|
// definition is in here somewhere
|
|
type_sp =
|
|
dwarf->FindCompleteObjCDefinitionTypeForDIE(die, attrs.name, true);
|
|
|
|
if (!type_sp) {
|
|
SymbolFileDWARFDebugMap *debug_map_symfile =
|
|
dwarf->GetDebugMapSymfile();
|
|
if (debug_map_symfile) {
|
|
// We weren't able to find a full declaration in this DWARF,
|
|
// see if we have a declaration anywhere else...
|
|
type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE(
|
|
die, attrs.name, true);
|
|
}
|
|
}
|
|
|
|
if (type_sp) {
|
|
if (log) {
|
|
dwarf->GetObjectFile()->GetModule()->LogMessage(
|
|
log,
|
|
"SymbolFileDWARF({0:p}) - {1:x16}: {2} type "
|
|
"\"{3}\" is an "
|
|
"incomplete objc type, complete type is {4:x8}",
|
|
static_cast<void *>(this), die.GetOffset(),
|
|
DW_TAG_value_to_name(tag), attrs.name.GetCString(),
|
|
type_sp->GetID());
|
|
}
|
|
|
|
// We found a real definition for this type elsewhere so lets use
|
|
// it and cache the fact that we found a complete type for this
|
|
// die
|
|
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
|
|
return type_sp;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (attrs.is_forward_declaration) {
|
|
// We have a forward declaration to a type and we need to try and
|
|
// find a full declaration. We look in the current type index just in
|
|
// case we have a forward declaration followed by an actual
|
|
// declarations in the DWARF. If this fails, we need to look
|
|
// elsewhere...
|
|
if (log) {
|
|
dwarf->GetObjectFile()->GetModule()->LogMessage(
|
|
log,
|
|
"SymbolFileDWARF({0:p}) - {1:x16}: {2} type \"{3}\" is a "
|
|
"forward declaration, trying to find complete type",
|
|
static_cast<void *>(this), die.GetOffset(), DW_TAG_value_to_name(tag),
|
|
attrs.name.GetCString());
|
|
}
|
|
|
|
// See if the type comes from a Clang module and if so, track down
|
|
// that type.
|
|
type_sp = ParseTypeFromClangModule(sc, die, log);
|
|
if (type_sp)
|
|
return type_sp;
|
|
|
|
// type_sp = FindDefinitionTypeForDIE (dwarf_cu, die,
|
|
// type_name_const_str);
|
|
type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die);
|
|
|
|
if (!type_sp) {
|
|
SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile();
|
|
if (debug_map_symfile) {
|
|
// We weren't able to find a full declaration in this DWARF, see
|
|
// if we have a declaration anywhere else...
|
|
type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext(die);
|
|
}
|
|
}
|
|
|
|
if (type_sp) {
|
|
if (log) {
|
|
dwarf->GetObjectFile()->GetModule()->LogMessage(
|
|
log,
|
|
"SymbolFileDWARF({0:p}) - {1:x16}: {2} type \"{3}\" is a "
|
|
"forward declaration, complete type is {4:x8}",
|
|
static_cast<void *>(this), die.GetOffset(),
|
|
DW_TAG_value_to_name(tag), attrs.name.GetCString(),
|
|
type_sp->GetID());
|
|
}
|
|
|
|
// We found a real definition for this type elsewhere so lets use
|
|
// it and cache the fact that we found a complete type for this die
|
|
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
|
|
clang::DeclContext *defn_decl_ctx =
|
|
GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID()));
|
|
if (defn_decl_ctx)
|
|
LinkDeclContextToDIE(defn_decl_ctx, die);
|
|
return type_sp;
|
|
}
|
|
}
|
|
assert(tag_decl_kind != -1);
|
|
UNUSED_IF_ASSERT_DISABLED(tag_decl_kind);
|
|
bool clang_type_was_created = false;
|
|
clang_type = CompilerType(
|
|
m_ast.weak_from_this(),
|
|
dwarf->GetForwardDeclDIEToCompilerType().lookup(die.GetDIE()));
|
|
if (!clang_type) {
|
|
clang::DeclContext *decl_ctx =
|
|
GetClangDeclContextContainingDIE(die, nullptr);
|
|
|
|
PrepareContextToReceiveMembers(m_ast, GetClangASTImporter(), decl_ctx, die,
|
|
attrs.name.GetCString());
|
|
|
|
if (attrs.accessibility == eAccessNone && decl_ctx) {
|
|
// Check the decl context that contains this class/struct/union. If
|
|
// it is a class we must give it an accessibility.
|
|
const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind();
|
|
if (DeclKindIsCXXClass(containing_decl_kind))
|
|
attrs.accessibility = default_accessibility;
|
|
}
|
|
|
|
ClangASTMetadata metadata;
|
|
metadata.SetUserID(die.GetID());
|
|
metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die));
|
|
|
|
TypeSystemClang::TemplateParameterInfos template_param_infos;
|
|
if (ParseTemplateParameterInfos(die, template_param_infos)) {
|
|
clang::ClassTemplateDecl *class_template_decl =
|
|
m_ast.ParseClassTemplateDecl(
|
|
decl_ctx, GetOwningClangModule(die), attrs.accessibility,
|
|
attrs.name.GetCString(), tag_decl_kind, template_param_infos);
|
|
if (!class_template_decl) {
|
|
if (log) {
|
|
dwarf->GetObjectFile()->GetModule()->LogMessage(
|
|
log,
|
|
"SymbolFileDWARF({0:p}) - {1:x16}: {2} type \"{3}\" "
|
|
"clang::ClassTemplateDecl failed to return a decl.",
|
|
static_cast<void *>(this), die.GetOffset(),
|
|
DW_TAG_value_to_name(tag), attrs.name.GetCString());
|
|
}
|
|
return TypeSP();
|
|
}
|
|
|
|
clang::ClassTemplateSpecializationDecl *class_specialization_decl =
|
|
m_ast.CreateClassTemplateSpecializationDecl(
|
|
decl_ctx, GetOwningClangModule(die), class_template_decl,
|
|
tag_decl_kind, template_param_infos);
|
|
clang_type = m_ast.CreateClassTemplateSpecializationType(
|
|
class_specialization_decl);
|
|
clang_type_was_created = true;
|
|
|
|
m_ast.SetMetadata(class_template_decl, metadata);
|
|
m_ast.SetMetadata(class_specialization_decl, metadata);
|
|
}
|
|
|
|
if (!clang_type_was_created) {
|
|
clang_type_was_created = true;
|
|
clang_type = m_ast.CreateRecordType(
|
|
decl_ctx, GetOwningClangModule(die), attrs.accessibility,
|
|
attrs.name.GetCString(), tag_decl_kind, attrs.class_language,
|
|
&metadata, attrs.exports_symbols);
|
|
}
|
|
}
|
|
|
|
// Store a forward declaration to this class type in case any
|
|
// parameters in any class methods need it for the clang types for
|
|
// function prototypes.
|
|
LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die);
|
|
type_sp = dwarf->MakeType(
|
|
die.GetID(), attrs.name, attrs.byte_size, nullptr, LLDB_INVALID_UID,
|
|
Type::eEncodingIsUID, &attrs.decl, clang_type,
|
|
Type::ResolveState::Forward,
|
|
TypePayloadClang(OptionalClangModuleID(), attrs.is_complete_objc_class));
|
|
|
|
// Add our type to the unique type map so we don't end up creating many
|
|
// copies of the same type over and over in the ASTContext for our
|
|
// module
|
|
unique_ast_entry_up->m_type_sp = type_sp;
|
|
unique_ast_entry_up->m_die = die;
|
|
unique_ast_entry_up->m_declaration = unique_decl;
|
|
unique_ast_entry_up->m_byte_size = attrs.byte_size.value_or(0);
|
|
dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename,
|
|
*unique_ast_entry_up);
|
|
|
|
if (!attrs.is_forward_declaration) {
|
|
// Always start the definition for a class type so that if the class
|
|
// has child classes or types that require the class to be created
|
|
// for use as their decl contexts the class will be ready to accept
|
|
// these child definitions.
|
|
if (!die.HasChildren()) {
|
|
// No children for this struct/union/class, lets finish it
|
|
if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) {
|
|
TypeSystemClang::CompleteTagDeclarationDefinition(clang_type);
|
|
} else {
|
|
dwarf->GetObjectFile()->GetModule()->ReportError(
|
|
|
|
"DWARF DIE at {0:x16} named \"{1}\" was not able to start "
|
|
"its "
|
|
"definition.\nPlease file a bug and attach the file at the "
|
|
"start of this error message",
|
|
die.GetOffset(), attrs.name.GetCString());
|
|
}
|
|
|
|
// If the byte size of the record is specified then overwrite the size
|
|
// that would be computed by Clang. This is only needed as LLDB's
|
|
// TypeSystemClang is always in C++ mode, but some compilers such as
|
|
// GCC and Clang give empty structs a size of 0 in C mode (in contrast to
|
|
// the size of 1 for empty structs that would be computed in C++ mode).
|
|
if (attrs.byte_size) {
|
|
clang::RecordDecl *record_decl =
|
|
TypeSystemClang::GetAsRecordDecl(clang_type);
|
|
if (record_decl) {
|
|
ClangASTImporter::LayoutInfo layout;
|
|
layout.bit_size = *attrs.byte_size * 8;
|
|
GetClangASTImporter().SetRecordLayout(record_decl, layout);
|
|
}
|
|
}
|
|
} else if (clang_type_was_created) {
|
|
// Start the definition if the class is not objective C since the
|
|
// underlying decls respond to isCompleteDefinition(). Objective
|
|
// C decls don't respond to isCompleteDefinition() so we can't
|
|
// start the declaration definition right away. For C++
|
|
// class/union/structs we want to start the definition in case the
|
|
// class is needed as the declaration context for a contained class
|
|
// or type without the need to complete that type..
|
|
|
|
if (attrs.class_language != eLanguageTypeObjC &&
|
|
attrs.class_language != eLanguageTypeObjC_plus_plus)
|
|
TypeSystemClang::StartTagDeclarationDefinition(clang_type);
|
|
|
|
// Leave this as a forward declaration until we need to know the
|
|
// details of the type. lldb_private::Type will automatically call
|
|
// the SymbolFile virtual function
|
|
// "SymbolFileDWARF::CompleteType(Type *)" When the definition
|
|
// needs to be defined.
|
|
assert(!dwarf->GetForwardDeclCompilerTypeToDIE().count(
|
|
ClangUtil::RemoveFastQualifiers(clang_type)
|
|
.GetOpaqueQualType()) &&
|
|
"Type already in the forward declaration map!");
|
|
// Can't assume m_ast.GetSymbolFile() is actually a
|
|
// SymbolFileDWARF, it can be a SymbolFileDWARFDebugMap for Apple
|
|
// binaries.
|
|
dwarf->GetForwardDeclDIEToCompilerType()[die.GetDIE()] =
|
|
clang_type.GetOpaqueQualType();
|
|
dwarf->GetForwardDeclCompilerTypeToDIE().try_emplace(
|
|
ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType(),
|
|
*die.GetDIERef());
|
|
m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true);
|
|
}
|
|
}
|
|
|
|
// If we made a clang type, set the trivial abi if applicable: We only
|
|
// do this for pass by value - which implies the Trivial ABI. There
|
|
// isn't a way to assert that something that would normally be pass by
|
|
// value is pass by reference, so we ignore that attribute if set.
|
|
if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_value) {
|
|
clang::CXXRecordDecl *record_decl =
|
|
m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType());
|
|
if (record_decl && record_decl->getDefinition()) {
|
|
record_decl->setHasTrivialSpecialMemberForCall();
|
|
}
|
|
}
|
|
|
|
if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_reference) {
|
|
clang::CXXRecordDecl *record_decl =
|
|
m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType());
|
|
if (record_decl)
|
|
record_decl->setArgPassingRestrictions(
|
|
clang::RecordArgPassingKind::CannotPassInRegs);
|
|
}
|
|
return type_sp;
|
|
}
|
|
|
|
// DWARF parsing functions
|
|
|
|
class DWARFASTParserClang::DelayedAddObjCClassProperty {
|
|
public:
|
|
DelayedAddObjCClassProperty(
|
|
const CompilerType &class_opaque_type, const char *property_name,
|
|
const CompilerType &property_opaque_type, // The property type is only
|
|
// required if you don't have an
|
|
// ivar decl
|
|
const char *property_setter_name, const char *property_getter_name,
|
|
uint32_t property_attributes, const ClangASTMetadata *metadata)
|
|
: m_class_opaque_type(class_opaque_type), m_property_name(property_name),
|
|
m_property_opaque_type(property_opaque_type),
|
|
m_property_setter_name(property_setter_name),
|
|
m_property_getter_name(property_getter_name),
|
|
m_property_attributes(property_attributes) {
|
|
if (metadata != nullptr) {
|
|
m_metadata_up = std::make_unique<ClangASTMetadata>();
|
|
*m_metadata_up = *metadata;
|
|
}
|
|
}
|
|
|
|
DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) {
|
|
*this = rhs;
|
|
}
|
|
|
|
DelayedAddObjCClassProperty &
|
|
operator=(const DelayedAddObjCClassProperty &rhs) {
|
|
m_class_opaque_type = rhs.m_class_opaque_type;
|
|
m_property_name = rhs.m_property_name;
|
|
m_property_opaque_type = rhs.m_property_opaque_type;
|
|
m_property_setter_name = rhs.m_property_setter_name;
|
|
m_property_getter_name = rhs.m_property_getter_name;
|
|
m_property_attributes = rhs.m_property_attributes;
|
|
|
|
if (rhs.m_metadata_up) {
|
|
m_metadata_up = std::make_unique<ClangASTMetadata>();
|
|
*m_metadata_up = *rhs.m_metadata_up;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
bool Finalize() {
|
|
return TypeSystemClang::AddObjCClassProperty(
|
|
m_class_opaque_type, m_property_name, m_property_opaque_type,
|
|
/*ivar_decl=*/nullptr, m_property_setter_name, m_property_getter_name,
|
|
m_property_attributes, m_metadata_up.get());
|
|
}
|
|
|
|
private:
|
|
CompilerType m_class_opaque_type;
|
|
const char *m_property_name;
|
|
CompilerType m_property_opaque_type;
|
|
const char *m_property_setter_name;
|
|
const char *m_property_getter_name;
|
|
uint32_t m_property_attributes;
|
|
std::unique_ptr<ClangASTMetadata> m_metadata_up;
|
|
};
|
|
|
|
bool DWARFASTParserClang::ParseTemplateDIE(
|
|
const DWARFDIE &die,
|
|
TypeSystemClang::TemplateParameterInfos &template_param_infos) {
|
|
const dw_tag_t tag = die.Tag();
|
|
bool is_template_template_argument = false;
|
|
|
|
switch (tag) {
|
|
case DW_TAG_GNU_template_parameter_pack: {
|
|
template_param_infos.SetParameterPack(
|
|
std::make_unique<TypeSystemClang::TemplateParameterInfos>());
|
|
for (DWARFDIE child_die : die.children()) {
|
|
if (!ParseTemplateDIE(child_die, template_param_infos.GetParameterPack()))
|
|
return false;
|
|
}
|
|
if (const char *name = die.GetName()) {
|
|
template_param_infos.SetPackName(name);
|
|
}
|
|
return true;
|
|
}
|
|
case DW_TAG_GNU_template_template_param:
|
|
is_template_template_argument = true;
|
|
[[fallthrough]];
|
|
case DW_TAG_template_type_parameter:
|
|
case DW_TAG_template_value_parameter: {
|
|
DWARFAttributes attributes = die.GetAttributes();
|
|
if (attributes.Size() == 0)
|
|
return true;
|
|
|
|
const char *name = nullptr;
|
|
const char *template_name = nullptr;
|
|
CompilerType clang_type;
|
|
uint64_t uval64 = 0;
|
|
bool uval64_valid = false;
|
|
bool is_default_template_arg = false;
|
|
DWARFFormValue form_value;
|
|
for (size_t i = 0; i < attributes.Size(); ++i) {
|
|
const dw_attr_t attr = attributes.AttributeAtIndex(i);
|
|
|
|
switch (attr) {
|
|
case DW_AT_name:
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value))
|
|
name = form_value.AsCString();
|
|
break;
|
|
|
|
case DW_AT_GNU_template_name:
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value))
|
|
template_name = form_value.AsCString();
|
|
break;
|
|
|
|
case DW_AT_type:
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value)) {
|
|
Type *lldb_type = die.ResolveTypeUID(form_value.Reference());
|
|
if (lldb_type)
|
|
clang_type = lldb_type->GetForwardCompilerType();
|
|
}
|
|
break;
|
|
|
|
case DW_AT_const_value:
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value)) {
|
|
uval64_valid = true;
|
|
uval64 = form_value.Unsigned();
|
|
}
|
|
break;
|
|
case DW_AT_default_value:
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value))
|
|
is_default_template_arg = form_value.Boolean();
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
clang::ASTContext &ast = m_ast.getASTContext();
|
|
if (!clang_type)
|
|
clang_type = m_ast.GetBasicType(eBasicTypeVoid);
|
|
|
|
if (!is_template_template_argument) {
|
|
bool is_signed = false;
|
|
// Get the signed value for any integer or enumeration if available
|
|
clang_type.IsIntegerOrEnumerationType(is_signed);
|
|
|
|
if (name && !name[0])
|
|
name = nullptr;
|
|
|
|
if (tag == DW_TAG_template_value_parameter && uval64_valid) {
|
|
std::optional<uint64_t> size = clang_type.GetBitSize(nullptr);
|
|
if (!size)
|
|
return false;
|
|
llvm::APInt apint(*size, uval64, is_signed);
|
|
template_param_infos.InsertArg(
|
|
name, clang::TemplateArgument(ast, llvm::APSInt(apint, !is_signed),
|
|
ClangUtil::GetQualType(clang_type),
|
|
is_default_template_arg));
|
|
} else {
|
|
template_param_infos.InsertArg(
|
|
name, clang::TemplateArgument(ClangUtil::GetQualType(clang_type),
|
|
/*isNullPtr*/ false,
|
|
is_default_template_arg));
|
|
}
|
|
} else {
|
|
auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name);
|
|
template_param_infos.InsertArg(
|
|
name, clang::TemplateArgument(clang::TemplateName(tplt_type),
|
|
is_default_template_arg));
|
|
}
|
|
}
|
|
return true;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DWARFASTParserClang::ParseTemplateParameterInfos(
|
|
const DWARFDIE &parent_die,
|
|
TypeSystemClang::TemplateParameterInfos &template_param_infos) {
|
|
|
|
if (!parent_die)
|
|
return false;
|
|
|
|
for (DWARFDIE die : parent_die.children()) {
|
|
const dw_tag_t tag = die.Tag();
|
|
|
|
switch (tag) {
|
|
case DW_TAG_template_type_parameter:
|
|
case DW_TAG_template_value_parameter:
|
|
case DW_TAG_GNU_template_parameter_pack:
|
|
case DW_TAG_GNU_template_template_param:
|
|
ParseTemplateDIE(die, template_param_infos);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return !template_param_infos.IsEmpty() ||
|
|
template_param_infos.hasParameterPack();
|
|
}
|
|
|
|
bool DWARFASTParserClang::CompleteRecordType(const DWARFDIE &die,
|
|
lldb_private::Type *type,
|
|
CompilerType &clang_type) {
|
|
const dw_tag_t tag = die.Tag();
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
|
|
ClangASTImporter::LayoutInfo layout_info;
|
|
|
|
if (die.HasChildren()) {
|
|
const bool type_is_objc_object_or_interface =
|
|
TypeSystemClang::IsObjCObjectOrInterfaceType(clang_type);
|
|
if (type_is_objc_object_or_interface) {
|
|
// For objective C we don't start the definition when the class is
|
|
// created.
|
|
TypeSystemClang::StartTagDeclarationDefinition(clang_type);
|
|
}
|
|
|
|
AccessType default_accessibility = eAccessNone;
|
|
if (tag == DW_TAG_structure_type) {
|
|
default_accessibility = eAccessPublic;
|
|
} else if (tag == DW_TAG_union_type) {
|
|
default_accessibility = eAccessPublic;
|
|
} else if (tag == DW_TAG_class_type) {
|
|
default_accessibility = eAccessPrivate;
|
|
}
|
|
|
|
std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases;
|
|
// Parse members and base classes first
|
|
std::vector<DWARFDIE> member_function_dies;
|
|
|
|
DelayedPropertyList delayed_properties;
|
|
ParseChildMembers(die, clang_type, bases, member_function_dies,
|
|
delayed_properties, default_accessibility, layout_info);
|
|
|
|
// Now parse any methods if there were any...
|
|
for (const DWARFDIE &die : member_function_dies)
|
|
dwarf->ResolveType(die);
|
|
|
|
if (type_is_objc_object_or_interface) {
|
|
ConstString class_name(clang_type.GetTypeName());
|
|
if (class_name) {
|
|
dwarf->GetObjCMethods(class_name, [&](DWARFDIE method_die) {
|
|
method_die.ResolveType();
|
|
return true;
|
|
});
|
|
|
|
for (DelayedAddObjCClassProperty &property : delayed_properties)
|
|
property.Finalize();
|
|
}
|
|
}
|
|
|
|
if (!bases.empty()) {
|
|
// Make sure all base classes refer to complete types and not forward
|
|
// declarations. If we don't do this, clang will crash with an
|
|
// assertion in the call to clang_type.TransferBaseClasses()
|
|
for (const auto &base_class : bases) {
|
|
clang::TypeSourceInfo *type_source_info =
|
|
base_class->getTypeSourceInfo();
|
|
if (type_source_info)
|
|
TypeSystemClang::RequireCompleteType(
|
|
m_ast.GetType(type_source_info->getType()));
|
|
}
|
|
|
|
m_ast.TransferBaseClasses(clang_type.GetOpaqueQualType(),
|
|
std::move(bases));
|
|
}
|
|
}
|
|
|
|
m_ast.AddMethodOverridesForCXXRecordType(clang_type.GetOpaqueQualType());
|
|
TypeSystemClang::BuildIndirectFields(clang_type);
|
|
TypeSystemClang::CompleteTagDeclarationDefinition(clang_type);
|
|
|
|
if (!layout_info.field_offsets.empty() || !layout_info.base_offsets.empty() ||
|
|
!layout_info.vbase_offsets.empty()) {
|
|
if (type)
|
|
layout_info.bit_size = type->GetByteSize(nullptr).value_or(0) * 8;
|
|
if (layout_info.bit_size == 0)
|
|
layout_info.bit_size =
|
|
die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8;
|
|
|
|
clang::CXXRecordDecl *record_decl =
|
|
m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType());
|
|
if (record_decl)
|
|
GetClangASTImporter().SetRecordLayout(record_decl, layout_info);
|
|
}
|
|
|
|
return (bool)clang_type;
|
|
}
|
|
|
|
bool DWARFASTParserClang::CompleteEnumType(const DWARFDIE &die,
|
|
lldb_private::Type *type,
|
|
CompilerType &clang_type) {
|
|
if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) {
|
|
if (die.HasChildren()) {
|
|
bool is_signed = false;
|
|
clang_type.IsIntegerType(is_signed);
|
|
ParseChildEnumerators(clang_type, is_signed,
|
|
type->GetByteSize(nullptr).value_or(0), die);
|
|
}
|
|
TypeSystemClang::CompleteTagDeclarationDefinition(clang_type);
|
|
}
|
|
return (bool)clang_type;
|
|
}
|
|
|
|
bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die,
|
|
lldb_private::Type *type,
|
|
CompilerType &clang_type) {
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
|
|
std::lock_guard<std::recursive_mutex> guard(
|
|
dwarf->GetObjectFile()->GetModule()->GetMutex());
|
|
|
|
// Disable external storage for this type so we don't get anymore
|
|
// clang::ExternalASTSource queries for this type.
|
|
m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false);
|
|
|
|
if (!die)
|
|
return false;
|
|
|
|
const dw_tag_t tag = die.Tag();
|
|
|
|
assert(clang_type);
|
|
switch (tag) {
|
|
case DW_TAG_structure_type:
|
|
case DW_TAG_union_type:
|
|
case DW_TAG_class_type:
|
|
return CompleteRecordType(die, type, clang_type);
|
|
case DW_TAG_enumeration_type:
|
|
return CompleteEnumType(die, type, clang_type);
|
|
default:
|
|
assert(false && "not a forward clang type decl!");
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void DWARFASTParserClang::EnsureAllDIEsInDeclContextHaveBeenParsed(
|
|
lldb_private::CompilerDeclContext decl_context) {
|
|
auto opaque_decl_ctx =
|
|
(clang::DeclContext *)decl_context.GetOpaqueDeclContext();
|
|
for (auto it = m_decl_ctx_to_die.find(opaque_decl_ctx);
|
|
it != m_decl_ctx_to_die.end() && it->first == opaque_decl_ctx;
|
|
it = m_decl_ctx_to_die.erase(it))
|
|
for (DWARFDIE decl : it->second.children())
|
|
GetClangDeclForDIE(decl);
|
|
}
|
|
|
|
CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) {
|
|
clang::Decl *clang_decl = GetClangDeclForDIE(die);
|
|
if (clang_decl != nullptr)
|
|
return m_ast.GetCompilerDecl(clang_decl);
|
|
return {};
|
|
}
|
|
|
|
CompilerDeclContext
|
|
DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) {
|
|
clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die);
|
|
if (clang_decl_ctx)
|
|
return m_ast.CreateDeclContext(clang_decl_ctx);
|
|
return {};
|
|
}
|
|
|
|
CompilerDeclContext
|
|
DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) {
|
|
clang::DeclContext *clang_decl_ctx =
|
|
GetClangDeclContextContainingDIE(die, nullptr);
|
|
if (clang_decl_ctx)
|
|
return m_ast.CreateDeclContext(clang_decl_ctx);
|
|
return {};
|
|
}
|
|
|
|
size_t DWARFASTParserClang::ParseChildEnumerators(
|
|
lldb_private::CompilerType &clang_type, bool is_signed,
|
|
uint32_t enumerator_byte_size, const DWARFDIE &parent_die) {
|
|
if (!parent_die)
|
|
return 0;
|
|
|
|
size_t enumerators_added = 0;
|
|
|
|
for (DWARFDIE die : parent_die.children()) {
|
|
const dw_tag_t tag = die.Tag();
|
|
if (tag != DW_TAG_enumerator)
|
|
continue;
|
|
|
|
DWARFAttributes attributes = die.GetAttributes();
|
|
if (attributes.Size() == 0)
|
|
continue;
|
|
|
|
const char *name = nullptr;
|
|
bool got_value = false;
|
|
int64_t enum_value = 0;
|
|
Declaration decl;
|
|
|
|
for (size_t i = 0; i < attributes.Size(); ++i) {
|
|
const dw_attr_t attr = attributes.AttributeAtIndex(i);
|
|
DWARFFormValue form_value;
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value)) {
|
|
switch (attr) {
|
|
case DW_AT_const_value:
|
|
got_value = true;
|
|
if (is_signed)
|
|
enum_value = form_value.Signed();
|
|
else
|
|
enum_value = form_value.Unsigned();
|
|
break;
|
|
|
|
case DW_AT_name:
|
|
name = form_value.AsCString();
|
|
break;
|
|
|
|
case DW_AT_description:
|
|
default:
|
|
case DW_AT_decl_file:
|
|
decl.SetFile(
|
|
attributes.CompileUnitAtIndex(i)->GetFile(form_value.Unsigned()));
|
|
break;
|
|
case DW_AT_decl_line:
|
|
decl.SetLine(form_value.Unsigned());
|
|
break;
|
|
case DW_AT_decl_column:
|
|
decl.SetColumn(form_value.Unsigned());
|
|
break;
|
|
case DW_AT_sibling:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (name && name[0] && got_value) {
|
|
m_ast.AddEnumerationValueToEnumerationType(
|
|
clang_type, decl, name, enum_value, enumerator_byte_size * 8);
|
|
++enumerators_added;
|
|
}
|
|
}
|
|
return enumerators_added;
|
|
}
|
|
|
|
ConstString
|
|
DWARFASTParserClang::ConstructDemangledNameFromDWARF(const DWARFDIE &die) {
|
|
bool is_static = false;
|
|
bool is_variadic = false;
|
|
bool has_template_params = false;
|
|
unsigned type_quals = 0;
|
|
std::vector<CompilerType> param_types;
|
|
std::vector<clang::ParmVarDecl *> param_decls;
|
|
StreamString sstr;
|
|
|
|
DWARFDeclContext decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die);
|
|
sstr << decl_ctx.GetQualifiedName();
|
|
|
|
clang::DeclContext *containing_decl_ctx =
|
|
GetClangDeclContextContainingDIE(die, nullptr);
|
|
ParseChildParameters(containing_decl_ctx, die, true, is_static, is_variadic,
|
|
has_template_params, param_types, param_decls,
|
|
type_quals);
|
|
sstr << "(";
|
|
for (size_t i = 0; i < param_types.size(); i++) {
|
|
if (i > 0)
|
|
sstr << ", ";
|
|
sstr << param_types[i].GetTypeName();
|
|
}
|
|
if (is_variadic)
|
|
sstr << ", ...";
|
|
sstr << ")";
|
|
if (type_quals & clang::Qualifiers::Const)
|
|
sstr << " const";
|
|
|
|
return ConstString(sstr.GetString());
|
|
}
|
|
|
|
Function *
|
|
DWARFASTParserClang::ParseFunctionFromDWARF(CompileUnit &comp_unit,
|
|
const DWARFDIE &die,
|
|
const AddressRange &func_range) {
|
|
assert(func_range.GetBaseAddress().IsValid());
|
|
DWARFRangeList func_ranges;
|
|
const char *name = nullptr;
|
|
const char *mangled = nullptr;
|
|
std::optional<int> decl_file;
|
|
std::optional<int> decl_line;
|
|
std::optional<int> decl_column;
|
|
std::optional<int> call_file;
|
|
std::optional<int> call_line;
|
|
std::optional<int> call_column;
|
|
DWARFExpressionList frame_base;
|
|
|
|
const dw_tag_t tag = die.Tag();
|
|
|
|
if (tag != DW_TAG_subprogram)
|
|
return nullptr;
|
|
|
|
if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line,
|
|
decl_column, call_file, call_line, call_column,
|
|
&frame_base)) {
|
|
Mangled func_name;
|
|
if (mangled)
|
|
func_name.SetValue(ConstString(mangled));
|
|
else if ((die.GetParent().Tag() == DW_TAG_compile_unit ||
|
|
die.GetParent().Tag() == DW_TAG_partial_unit) &&
|
|
Language::LanguageIsCPlusPlus(
|
|
SymbolFileDWARF::GetLanguage(*die.GetCU())) &&
|
|
!Language::LanguageIsObjC(
|
|
SymbolFileDWARF::GetLanguage(*die.GetCU())) &&
|
|
name && strcmp(name, "main") != 0) {
|
|
// If the mangled name is not present in the DWARF, generate the
|
|
// demangled name using the decl context. We skip if the function is
|
|
// "main" as its name is never mangled.
|
|
func_name.SetValue(ConstructDemangledNameFromDWARF(die));
|
|
} else
|
|
func_name.SetValue(ConstString(name));
|
|
|
|
FunctionSP func_sp;
|
|
std::unique_ptr<Declaration> decl_up;
|
|
if (decl_file || decl_line || decl_column)
|
|
decl_up = std::make_unique<Declaration>(
|
|
die.GetCU()->GetFile(decl_file ? *decl_file : 0),
|
|
decl_line ? *decl_line : 0, decl_column ? *decl_column : 0);
|
|
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
// Supply the type _only_ if it has already been parsed
|
|
Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE());
|
|
|
|
assert(func_type == nullptr || func_type != DIE_IS_BEING_PARSED);
|
|
|
|
const user_id_t func_user_id = die.GetID();
|
|
func_sp =
|
|
std::make_shared<Function>(&comp_unit,
|
|
func_user_id, // UserID is the DIE offset
|
|
func_user_id, func_name, func_type,
|
|
func_range); // first address range
|
|
|
|
if (func_sp.get() != nullptr) {
|
|
if (frame_base.IsValid())
|
|
func_sp->GetFrameBaseExpression() = frame_base;
|
|
comp_unit.AddFunction(func_sp);
|
|
return func_sp.get();
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
namespace {
|
|
/// Parsed form of all attributes that are relevant for parsing type members.
|
|
struct MemberAttributes {
|
|
explicit MemberAttributes(const DWARFDIE &die, const DWARFDIE &parent_die,
|
|
ModuleSP module_sp);
|
|
const char *name = nullptr;
|
|
/// Indicates how many bits into the word (according to the host endianness)
|
|
/// the low-order bit of the field starts. Can be negative.
|
|
int64_t bit_offset = 0;
|
|
/// Indicates the size of the field in bits.
|
|
size_t bit_size = 0;
|
|
uint64_t data_bit_offset = UINT64_MAX;
|
|
AccessType accessibility = eAccessNone;
|
|
std::optional<uint64_t> byte_size;
|
|
std::optional<DWARFFormValue> const_value_form;
|
|
DWARFFormValue encoding_form;
|
|
/// Indicates the byte offset of the word from the base address of the
|
|
/// structure.
|
|
uint32_t member_byte_offset = UINT32_MAX;
|
|
bool is_artificial = false;
|
|
bool is_declaration = false;
|
|
};
|
|
|
|
/// Parsed form of all attributes that are relevant for parsing Objective-C
|
|
/// properties.
|
|
struct PropertyAttributes {
|
|
explicit PropertyAttributes(const DWARFDIE &die);
|
|
const char *prop_name = nullptr;
|
|
const char *prop_getter_name = nullptr;
|
|
const char *prop_setter_name = nullptr;
|
|
/// \see clang::ObjCPropertyAttribute
|
|
uint32_t prop_attributes = 0;
|
|
};
|
|
|
|
struct DiscriminantValue {
|
|
explicit DiscriminantValue(const DWARFDIE &die, ModuleSP module_sp);
|
|
|
|
uint32_t byte_offset;
|
|
uint32_t byte_size;
|
|
DWARFFormValue type_ref;
|
|
};
|
|
|
|
struct VariantMember {
|
|
explicit VariantMember(DWARFDIE &die, ModuleSP module_sp);
|
|
bool IsDefault() const;
|
|
|
|
std::optional<uint32_t> discr_value;
|
|
DWARFFormValue type_ref;
|
|
ConstString variant_name;
|
|
uint32_t byte_offset;
|
|
ConstString GetName() const;
|
|
};
|
|
|
|
struct VariantPart {
|
|
explicit VariantPart(const DWARFDIE &die, const DWARFDIE &parent_die,
|
|
ModuleSP module_sp);
|
|
|
|
std::vector<VariantMember> &members();
|
|
|
|
DiscriminantValue &discriminant();
|
|
|
|
private:
|
|
std::vector<VariantMember> _members;
|
|
DiscriminantValue _discriminant;
|
|
};
|
|
|
|
} // namespace
|
|
|
|
ConstString VariantMember::GetName() const { return this->variant_name; }
|
|
|
|
bool VariantMember::IsDefault() const { return !discr_value; }
|
|
|
|
VariantMember::VariantMember(DWARFDIE &die, lldb::ModuleSP module_sp) {
|
|
assert(die.Tag() == llvm::dwarf::DW_TAG_variant);
|
|
this->discr_value =
|
|
die.GetAttributeValueAsOptionalUnsigned(DW_AT_discr_value);
|
|
|
|
for (auto child_die : die.children()) {
|
|
switch (child_die.Tag()) {
|
|
case llvm::dwarf::DW_TAG_member: {
|
|
DWARFAttributes attributes = child_die.GetAttributes();
|
|
for (std::size_t i = 0; i < attributes.Size(); ++i) {
|
|
DWARFFormValue form_value;
|
|
const dw_attr_t attr = attributes.AttributeAtIndex(i);
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value)) {
|
|
switch (attr) {
|
|
case DW_AT_name:
|
|
variant_name = ConstString(form_value.AsCString());
|
|
break;
|
|
case DW_AT_type:
|
|
type_ref = form_value;
|
|
break;
|
|
|
|
case DW_AT_data_member_location:
|
|
if (auto maybe_offset =
|
|
ExtractDataMemberLocation(die, form_value, module_sp))
|
|
byte_offset = *maybe_offset;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
DiscriminantValue::DiscriminantValue(const DWARFDIE &die, ModuleSP module_sp) {
|
|
auto referenced_die = die.GetReferencedDIE(DW_AT_discr);
|
|
DWARFAttributes attributes = referenced_die.GetAttributes();
|
|
for (std::size_t i = 0; i < attributes.Size(); ++i) {
|
|
const dw_attr_t attr = attributes.AttributeAtIndex(i);
|
|
DWARFFormValue form_value;
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value)) {
|
|
switch (attr) {
|
|
case DW_AT_type:
|
|
type_ref = form_value;
|
|
break;
|
|
case DW_AT_data_member_location:
|
|
if (auto maybe_offset =
|
|
ExtractDataMemberLocation(die, form_value, module_sp))
|
|
byte_offset = *maybe_offset;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
VariantPart::VariantPart(const DWARFDIE &die, const DWARFDIE &parent_die,
|
|
lldb::ModuleSP module_sp)
|
|
: _members(), _discriminant(die, module_sp) {
|
|
|
|
for (auto child : die.children()) {
|
|
if (child.Tag() == llvm::dwarf::DW_TAG_variant) {
|
|
_members.push_back(VariantMember(child, module_sp));
|
|
}
|
|
}
|
|
}
|
|
|
|
std::vector<VariantMember> &VariantPart::members() { return this->_members; }
|
|
|
|
DiscriminantValue &VariantPart::discriminant() { return this->_discriminant; }
|
|
|
|
MemberAttributes::MemberAttributes(const DWARFDIE &die,
|
|
const DWARFDIE &parent_die,
|
|
ModuleSP module_sp) {
|
|
DWARFAttributes attributes = die.GetAttributes();
|
|
for (size_t i = 0; i < attributes.Size(); ++i) {
|
|
const dw_attr_t attr = attributes.AttributeAtIndex(i);
|
|
DWARFFormValue form_value;
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value)) {
|
|
switch (attr) {
|
|
case DW_AT_name:
|
|
name = form_value.AsCString();
|
|
break;
|
|
case DW_AT_type:
|
|
encoding_form = form_value;
|
|
break;
|
|
case DW_AT_bit_offset:
|
|
bit_offset = form_value.Signed();
|
|
break;
|
|
case DW_AT_bit_size:
|
|
bit_size = form_value.Unsigned();
|
|
break;
|
|
case DW_AT_byte_size:
|
|
byte_size = form_value.Unsigned();
|
|
break;
|
|
case DW_AT_const_value:
|
|
const_value_form = form_value;
|
|
break;
|
|
case DW_AT_data_bit_offset:
|
|
data_bit_offset = form_value.Unsigned();
|
|
break;
|
|
case DW_AT_data_member_location:
|
|
if (auto maybe_offset =
|
|
ExtractDataMemberLocation(die, form_value, module_sp))
|
|
member_byte_offset = *maybe_offset;
|
|
break;
|
|
|
|
case DW_AT_accessibility:
|
|
accessibility =
|
|
DWARFASTParser::GetAccessTypeFromDWARF(form_value.Unsigned());
|
|
break;
|
|
case DW_AT_artificial:
|
|
is_artificial = form_value.Boolean();
|
|
break;
|
|
case DW_AT_declaration:
|
|
is_declaration = form_value.Boolean();
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Clang has a DWARF generation bug where sometimes it represents
|
|
// fields that are references with bad byte size and bit size/offset
|
|
// information such as:
|
|
//
|
|
// DW_AT_byte_size( 0x00 )
|
|
// DW_AT_bit_size( 0x40 )
|
|
// DW_AT_bit_offset( 0xffffffffffffffc0 )
|
|
//
|
|
// So check the bit offset to make sure it is sane, and if the values
|
|
// are not sane, remove them. If we don't do this then we will end up
|
|
// with a crash if we try to use this type in an expression when clang
|
|
// becomes unhappy with its recycled debug info.
|
|
if (byte_size.value_or(0) == 0 && bit_offset < 0) {
|
|
bit_size = 0;
|
|
bit_offset = 0;
|
|
}
|
|
}
|
|
|
|
PropertyAttributes::PropertyAttributes(const DWARFDIE &die) {
|
|
|
|
DWARFAttributes attributes = die.GetAttributes();
|
|
for (size_t i = 0; i < attributes.Size(); ++i) {
|
|
const dw_attr_t attr = attributes.AttributeAtIndex(i);
|
|
DWARFFormValue form_value;
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value)) {
|
|
switch (attr) {
|
|
case DW_AT_APPLE_property_name:
|
|
prop_name = form_value.AsCString();
|
|
break;
|
|
case DW_AT_APPLE_property_getter:
|
|
prop_getter_name = form_value.AsCString();
|
|
break;
|
|
case DW_AT_APPLE_property_setter:
|
|
prop_setter_name = form_value.AsCString();
|
|
break;
|
|
case DW_AT_APPLE_property_attribute:
|
|
prop_attributes = form_value.Unsigned();
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!prop_name)
|
|
return;
|
|
ConstString fixed_setter;
|
|
|
|
// Check if the property getter/setter were provided as full names.
|
|
// We want basenames, so we extract them.
|
|
if (prop_getter_name && prop_getter_name[0] == '-') {
|
|
std::optional<const ObjCLanguage::MethodName> prop_getter_method =
|
|
ObjCLanguage::MethodName::Create(prop_getter_name, true);
|
|
if (prop_getter_method)
|
|
prop_getter_name =
|
|
ConstString(prop_getter_method->GetSelector()).GetCString();
|
|
}
|
|
|
|
if (prop_setter_name && prop_setter_name[0] == '-') {
|
|
std::optional<const ObjCLanguage::MethodName> prop_setter_method =
|
|
ObjCLanguage::MethodName::Create(prop_setter_name, true);
|
|
if (prop_setter_method)
|
|
prop_setter_name =
|
|
ConstString(prop_setter_method->GetSelector()).GetCString();
|
|
}
|
|
|
|
// If the names haven't been provided, they need to be filled in.
|
|
if (!prop_getter_name)
|
|
prop_getter_name = prop_name;
|
|
if (!prop_setter_name && prop_name[0] &&
|
|
!(prop_attributes & DW_APPLE_PROPERTY_readonly)) {
|
|
StreamString ss;
|
|
|
|
ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]);
|
|
|
|
fixed_setter.SetString(ss.GetString());
|
|
prop_setter_name = fixed_setter.GetCString();
|
|
}
|
|
}
|
|
|
|
void DWARFASTParserClang::ParseObjCProperty(
|
|
const DWARFDIE &die, const DWARFDIE &parent_die,
|
|
const lldb_private::CompilerType &class_clang_type,
|
|
DelayedPropertyList &delayed_properties) {
|
|
// This function can only parse DW_TAG_APPLE_property.
|
|
assert(die.Tag() == DW_TAG_APPLE_property);
|
|
|
|
ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule();
|
|
|
|
const MemberAttributes attrs(die, parent_die, module_sp);
|
|
const PropertyAttributes propAttrs(die);
|
|
|
|
if (!propAttrs.prop_name) {
|
|
module_sp->ReportError("{0:x8}: DW_TAG_APPLE_property has no name.",
|
|
die.GetID());
|
|
return;
|
|
}
|
|
|
|
Type *member_type = die.ResolveTypeUID(attrs.encoding_form.Reference());
|
|
if (!member_type) {
|
|
module_sp->ReportError(
|
|
"{0:x8}: DW_TAG_APPLE_property '{1}' refers to type {2:x16}"
|
|
" which was unable to be parsed",
|
|
die.GetID(), propAttrs.prop_name,
|
|
attrs.encoding_form.Reference().GetOffset());
|
|
return;
|
|
}
|
|
|
|
ClangASTMetadata metadata;
|
|
metadata.SetUserID(die.GetID());
|
|
delayed_properties.push_back(DelayedAddObjCClassProperty(
|
|
class_clang_type, propAttrs.prop_name,
|
|
member_type->GetLayoutCompilerType(), propAttrs.prop_setter_name,
|
|
propAttrs.prop_getter_name, propAttrs.prop_attributes, &metadata));
|
|
}
|
|
|
|
llvm::Expected<llvm::APInt> DWARFASTParserClang::ExtractIntFromFormValue(
|
|
const CompilerType &int_type, const DWARFFormValue &form_value) const {
|
|
clang::QualType qt = ClangUtil::GetQualType(int_type);
|
|
assert(qt->isIntegralOrEnumerationType());
|
|
auto ts_ptr = int_type.GetTypeSystem().dyn_cast_or_null<TypeSystemClang>();
|
|
if (!ts_ptr)
|
|
return llvm::createStringError(llvm::inconvertibleErrorCode(),
|
|
"TypeSystem not clang");
|
|
TypeSystemClang &ts = *ts_ptr;
|
|
clang::ASTContext &ast = ts.getASTContext();
|
|
|
|
const unsigned type_bits = ast.getIntWidth(qt);
|
|
const bool is_unsigned = qt->isUnsignedIntegerType();
|
|
|
|
// The maximum int size supported at the moment by this function. Limited
|
|
// by the uint64_t return type of DWARFFormValue::Signed/Unsigned.
|
|
constexpr std::size_t max_bit_size = 64;
|
|
|
|
// For values bigger than 64 bit (e.g. __int128_t values),
|
|
// DWARFFormValue's Signed/Unsigned functions will return wrong results so
|
|
// emit an error for now.
|
|
if (type_bits > max_bit_size) {
|
|
auto msg = llvm::formatv("Can only parse integers with up to {0} bits, but "
|
|
"given integer has {1} bits.",
|
|
max_bit_size, type_bits);
|
|
return llvm::createStringError(llvm::inconvertibleErrorCode(), msg.str());
|
|
}
|
|
|
|
// Construct an APInt with the maximum bit size and the given integer.
|
|
llvm::APInt result(max_bit_size, form_value.Unsigned(), !is_unsigned);
|
|
|
|
// Calculate how many bits are required to represent the input value.
|
|
// For unsigned types, take the number of active bits in the APInt.
|
|
// For signed types, ask APInt how many bits are required to represent the
|
|
// signed integer.
|
|
const unsigned required_bits =
|
|
is_unsigned ? result.getActiveBits() : result.getSignificantBits();
|
|
|
|
// If the input value doesn't fit into the integer type, return an error.
|
|
if (required_bits > type_bits) {
|
|
std::string value_as_str = is_unsigned
|
|
? std::to_string(form_value.Unsigned())
|
|
: std::to_string(form_value.Signed());
|
|
auto msg = llvm::formatv("Can't store {0} value {1} in integer with {2} "
|
|
"bits.",
|
|
(is_unsigned ? "unsigned" : "signed"),
|
|
value_as_str, type_bits);
|
|
return llvm::createStringError(llvm::inconvertibleErrorCode(), msg.str());
|
|
}
|
|
|
|
// Trim the result to the bit width our the int type.
|
|
if (result.getBitWidth() > type_bits)
|
|
result = result.trunc(type_bits);
|
|
return result;
|
|
}
|
|
|
|
void DWARFASTParserClang::ParseSingleMember(
|
|
const DWARFDIE &die, const DWARFDIE &parent_die,
|
|
const lldb_private::CompilerType &class_clang_type,
|
|
lldb::AccessType default_accessibility,
|
|
lldb_private::ClangASTImporter::LayoutInfo &layout_info,
|
|
FieldInfo &last_field_info) {
|
|
Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
|
|
// This function can only parse DW_TAG_member.
|
|
assert(die.Tag() == DW_TAG_member);
|
|
|
|
ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule();
|
|
const dw_tag_t tag = die.Tag();
|
|
// Get the parent byte size so we can verify any members will fit
|
|
const uint64_t parent_byte_size =
|
|
parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX);
|
|
const uint64_t parent_bit_size =
|
|
parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8;
|
|
|
|
// FIXME: Remove the workarounds below and make this const.
|
|
MemberAttributes attrs(die, parent_die, module_sp);
|
|
|
|
const bool class_is_objc_object_or_interface =
|
|
TypeSystemClang::IsObjCObjectOrInterfaceType(class_clang_type);
|
|
|
|
// FIXME: Make Clang ignore Objective-C accessibility for expressions
|
|
if (class_is_objc_object_or_interface)
|
|
attrs.accessibility = eAccessNone;
|
|
|
|
// Handle static members, which are typically members without
|
|
// locations. However, GCC doesn't emit DW_AT_data_member_location
|
|
// for any union members (regardless of linkage).
|
|
// Non-normative text pre-DWARFv5 recommends marking static
|
|
// data members with an DW_AT_external flag. Clang emits this consistently
|
|
// whereas GCC emits it only for static data members if not part of an
|
|
// anonymous namespace. The flag that is consistently emitted for static
|
|
// data members is DW_AT_declaration, so we check it instead.
|
|
// FIXME: Since DWARFv5, static data members are marked DW_AT_variable so we
|
|
// can consistently detect them on both GCC and Clang without below heuristic.
|
|
if (attrs.member_byte_offset == UINT32_MAX &&
|
|
attrs.data_bit_offset == UINT64_MAX && attrs.is_declaration) {
|
|
Type *var_type = die.ResolveTypeUID(attrs.encoding_form.Reference());
|
|
|
|
if (var_type) {
|
|
if (attrs.accessibility == eAccessNone)
|
|
attrs.accessibility = eAccessPublic;
|
|
CompilerType ct = var_type->GetForwardCompilerType();
|
|
clang::VarDecl *v = TypeSystemClang::AddVariableToRecordType(
|
|
class_clang_type, attrs.name, ct, attrs.accessibility);
|
|
if (!v) {
|
|
LLDB_LOG(log, "Failed to add variable to the record type");
|
|
return;
|
|
}
|
|
|
|
bool unused;
|
|
// TODO: Support float/double static members as well.
|
|
if (!attrs.const_value_form || !ct.IsIntegerOrEnumerationType(unused))
|
|
return;
|
|
|
|
llvm::Expected<llvm::APInt> const_value_or_err =
|
|
ExtractIntFromFormValue(ct, *attrs.const_value_form);
|
|
if (!const_value_or_err) {
|
|
LLDB_LOG_ERROR(log, const_value_or_err.takeError(),
|
|
"Failed to add const value to variable {1}: {0}",
|
|
v->getQualifiedNameAsString());
|
|
return;
|
|
}
|
|
|
|
TypeSystemClang::SetIntegerInitializerForVariable(v, *const_value_or_err);
|
|
}
|
|
return;
|
|
}
|
|
|
|
Type *member_type = die.ResolveTypeUID(attrs.encoding_form.Reference());
|
|
if (!member_type) {
|
|
if (attrs.name)
|
|
module_sp->ReportError(
|
|
"{0:x8}: DW_TAG_member '{1}' refers to type {2:x16}"
|
|
" which was unable to be parsed",
|
|
die.GetID(), attrs.name, attrs.encoding_form.Reference().GetOffset());
|
|
else
|
|
module_sp->ReportError("{0:x8}: DW_TAG_member refers to type {1:x16}"
|
|
" which was unable to be parsed",
|
|
die.GetID(),
|
|
attrs.encoding_form.Reference().GetOffset());
|
|
return;
|
|
}
|
|
|
|
const uint64_t character_width = 8;
|
|
const uint64_t word_width = 32;
|
|
CompilerType member_clang_type = member_type->GetLayoutCompilerType();
|
|
|
|
if (attrs.accessibility == eAccessNone)
|
|
attrs.accessibility = default_accessibility;
|
|
|
|
uint64_t field_bit_offset = (attrs.member_byte_offset == UINT32_MAX
|
|
? 0
|
|
: (attrs.member_byte_offset * 8ULL));
|
|
|
|
if (attrs.bit_size > 0) {
|
|
FieldInfo this_field_info;
|
|
this_field_info.bit_offset = field_bit_offset;
|
|
this_field_info.bit_size = attrs.bit_size;
|
|
|
|
if (attrs.data_bit_offset != UINT64_MAX) {
|
|
this_field_info.bit_offset = attrs.data_bit_offset;
|
|
} else {
|
|
if (!attrs.byte_size)
|
|
attrs.byte_size = member_type->GetByteSize(nullptr);
|
|
|
|
ObjectFile *objfile = die.GetDWARF()->GetObjectFile();
|
|
if (objfile->GetByteOrder() == eByteOrderLittle) {
|
|
this_field_info.bit_offset += attrs.byte_size.value_or(0) * 8;
|
|
this_field_info.bit_offset -= (attrs.bit_offset + attrs.bit_size);
|
|
} else {
|
|
this_field_info.bit_offset += attrs.bit_offset;
|
|
}
|
|
}
|
|
|
|
// The ObjC runtime knows the byte offset but we still need to provide
|
|
// the bit-offset in the layout. It just means something different then
|
|
// what it does in C and C++. So we skip this check for ObjC types.
|
|
//
|
|
// We also skip this for fields of a union since they will all have a
|
|
// zero offset.
|
|
if (!TypeSystemClang::IsObjCObjectOrInterfaceType(class_clang_type) &&
|
|
!(parent_die.Tag() == DW_TAG_union_type &&
|
|
this_field_info.bit_offset == 0) &&
|
|
((this_field_info.bit_offset >= parent_bit_size) ||
|
|
(last_field_info.IsBitfield() &&
|
|
!last_field_info.NextBitfieldOffsetIsValid(
|
|
this_field_info.bit_offset)))) {
|
|
ObjectFile *objfile = die.GetDWARF()->GetObjectFile();
|
|
objfile->GetModule()->ReportWarning(
|
|
"{0:x16}: {1} bitfield named \"{2}\" has invalid "
|
|
"bit offset ({3:x8}) member will be ignored. Please file a bug "
|
|
"against the "
|
|
"compiler and include the preprocessed output for {4}\n",
|
|
die.GetID(), DW_TAG_value_to_name(tag), attrs.name,
|
|
this_field_info.bit_offset, GetUnitName(parent_die).c_str());
|
|
return;
|
|
}
|
|
|
|
// Update the field bit offset we will report for layout
|
|
field_bit_offset = this_field_info.bit_offset;
|
|
|
|
// Objective-C has invalid DW_AT_bit_offset values in older
|
|
// versions of clang, so we have to be careful and only insert
|
|
// unnamed bitfields if we have a new enough clang.
|
|
bool detect_unnamed_bitfields = true;
|
|
|
|
if (class_is_objc_object_or_interface)
|
|
detect_unnamed_bitfields =
|
|
die.GetCU()->Supports_unnamed_objc_bitfields();
|
|
|
|
if (detect_unnamed_bitfields) {
|
|
std::optional<FieldInfo> unnamed_field_info;
|
|
uint64_t last_field_end =
|
|
last_field_info.bit_offset + last_field_info.bit_size;
|
|
|
|
if (!last_field_info.IsBitfield()) {
|
|
// The last field was not a bit-field...
|
|
// but if it did take up the entire word then we need to extend
|
|
// last_field_end so the bit-field does not step into the last
|
|
// fields padding.
|
|
if (last_field_end != 0 && ((last_field_end % word_width) != 0))
|
|
last_field_end += word_width - (last_field_end % word_width);
|
|
}
|
|
|
|
if (ShouldCreateUnnamedBitfield(last_field_info, last_field_end,
|
|
this_field_info, layout_info)) {
|
|
unnamed_field_info = FieldInfo{};
|
|
unnamed_field_info->bit_size =
|
|
this_field_info.bit_offset - last_field_end;
|
|
unnamed_field_info->bit_offset = last_field_end;
|
|
}
|
|
|
|
if (unnamed_field_info) {
|
|
clang::FieldDecl *unnamed_bitfield_decl =
|
|
TypeSystemClang::AddFieldToRecordType(
|
|
class_clang_type, llvm::StringRef(),
|
|
m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint,
|
|
word_width),
|
|
attrs.accessibility, unnamed_field_info->bit_size);
|
|
|
|
layout_info.field_offsets.insert(std::make_pair(
|
|
unnamed_bitfield_decl, unnamed_field_info->bit_offset));
|
|
}
|
|
}
|
|
|
|
last_field_info = this_field_info;
|
|
last_field_info.SetIsBitfield(true);
|
|
} else {
|
|
last_field_info.bit_offset = field_bit_offset;
|
|
|
|
if (std::optional<uint64_t> clang_type_size =
|
|
member_type->GetByteSize(nullptr)) {
|
|
last_field_info.bit_size = *clang_type_size * character_width;
|
|
}
|
|
|
|
last_field_info.SetIsBitfield(false);
|
|
}
|
|
|
|
// Don't turn artificial members such as vtable pointers into real FieldDecls
|
|
// in our AST. Clang will re-create those articial members and they would
|
|
// otherwise just overlap in the layout with the FieldDecls we add here.
|
|
// This needs to be done after updating FieldInfo which keeps track of where
|
|
// field start/end so we don't later try to fill the space of this
|
|
// artificial member with (unnamed bitfield) padding.
|
|
// FIXME: This check should verify that this is indeed an artificial member
|
|
// we are supposed to ignore.
|
|
if (attrs.is_artificial) {
|
|
last_field_info.SetIsArtificial(true);
|
|
return;
|
|
}
|
|
|
|
if (!member_clang_type.IsCompleteType())
|
|
member_clang_type.GetCompleteType();
|
|
|
|
{
|
|
// Older versions of clang emit the same DWARF for array[0] and array[1]. If
|
|
// the current field is at the end of the structure, then there is
|
|
// definitely no room for extra elements and we override the type to
|
|
// array[0]. This was fixed by f454dfb6b5af.
|
|
CompilerType member_array_element_type;
|
|
uint64_t member_array_size;
|
|
bool member_array_is_incomplete;
|
|
|
|
if (member_clang_type.IsArrayType(&member_array_element_type,
|
|
&member_array_size,
|
|
&member_array_is_incomplete) &&
|
|
!member_array_is_incomplete) {
|
|
uint64_t parent_byte_size =
|
|
parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX);
|
|
|
|
if (attrs.member_byte_offset >= parent_byte_size) {
|
|
if (member_array_size != 1 &&
|
|
(member_array_size != 0 ||
|
|
attrs.member_byte_offset > parent_byte_size)) {
|
|
module_sp->ReportError(
|
|
"{0:x8}: DW_TAG_member '{1}' refers to type {2:x16}"
|
|
" which extends beyond the bounds of {3:x8}",
|
|
die.GetID(), attrs.name,
|
|
attrs.encoding_form.Reference().GetOffset(), parent_die.GetID());
|
|
}
|
|
|
|
member_clang_type =
|
|
m_ast.CreateArrayType(member_array_element_type, 0, false);
|
|
}
|
|
}
|
|
}
|
|
|
|
TypeSystemClang::RequireCompleteType(member_clang_type);
|
|
|
|
clang::FieldDecl *field_decl = TypeSystemClang::AddFieldToRecordType(
|
|
class_clang_type, attrs.name, member_clang_type, attrs.accessibility,
|
|
attrs.bit_size);
|
|
|
|
m_ast.SetMetadataAsUserID(field_decl, die.GetID());
|
|
|
|
layout_info.field_offsets.insert(
|
|
std::make_pair(field_decl, field_bit_offset));
|
|
}
|
|
|
|
bool DWARFASTParserClang::ParseChildMembers(
|
|
const DWARFDIE &parent_die, CompilerType &class_clang_type,
|
|
std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes,
|
|
std::vector<DWARFDIE> &member_function_dies,
|
|
DelayedPropertyList &delayed_properties,
|
|
const AccessType default_accessibility,
|
|
ClangASTImporter::LayoutInfo &layout_info) {
|
|
if (!parent_die)
|
|
return false;
|
|
|
|
FieldInfo last_field_info;
|
|
|
|
ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule();
|
|
auto ts = class_clang_type.GetTypeSystem();
|
|
auto ast = ts.dyn_cast_or_null<TypeSystemClang>();
|
|
if (ast == nullptr)
|
|
return false;
|
|
|
|
for (DWARFDIE die : parent_die.children()) {
|
|
dw_tag_t tag = die.Tag();
|
|
|
|
switch (tag) {
|
|
case DW_TAG_APPLE_property:
|
|
ParseObjCProperty(die, parent_die, class_clang_type, delayed_properties);
|
|
break;
|
|
|
|
case DW_TAG_variant_part:
|
|
if (die.GetCU()->GetDWARFLanguageType() == eLanguageTypeRust) {
|
|
ParseRustVariantPart(die, parent_die, class_clang_type,
|
|
default_accessibility, layout_info);
|
|
}
|
|
break;
|
|
|
|
case DW_TAG_member:
|
|
ParseSingleMember(die, parent_die, class_clang_type,
|
|
default_accessibility, layout_info, last_field_info);
|
|
break;
|
|
|
|
case DW_TAG_subprogram:
|
|
// Let the type parsing code handle this one for us.
|
|
member_function_dies.push_back(die);
|
|
break;
|
|
|
|
case DW_TAG_inheritance:
|
|
ParseInheritance(die, parent_die, class_clang_type, default_accessibility,
|
|
module_sp, base_classes, layout_info);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
size_t DWARFASTParserClang::ParseChildParameters(
|
|
clang::DeclContext *containing_decl_ctx, const DWARFDIE &parent_die,
|
|
bool skip_artificial, bool &is_static, bool &is_variadic,
|
|
bool &has_template_params, std::vector<CompilerType> &function_param_types,
|
|
std::vector<clang::ParmVarDecl *> &function_param_decls,
|
|
unsigned &type_quals) {
|
|
if (!parent_die)
|
|
return 0;
|
|
|
|
size_t arg_idx = 0;
|
|
for (DWARFDIE die : parent_die.children()) {
|
|
const dw_tag_t tag = die.Tag();
|
|
switch (tag) {
|
|
case DW_TAG_formal_parameter: {
|
|
DWARFAttributes attributes = die.GetAttributes();
|
|
if (attributes.Size() == 0) {
|
|
arg_idx++;
|
|
break;
|
|
}
|
|
|
|
const char *name = nullptr;
|
|
DWARFFormValue param_type_die_form;
|
|
bool is_artificial = false;
|
|
// one of None, Auto, Register, Extern, Static, PrivateExtern
|
|
|
|
clang::StorageClass storage = clang::SC_None;
|
|
uint32_t i;
|
|
for (i = 0; i < attributes.Size(); ++i) {
|
|
const dw_attr_t attr = attributes.AttributeAtIndex(i);
|
|
DWARFFormValue form_value;
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value)) {
|
|
switch (attr) {
|
|
case DW_AT_name:
|
|
name = form_value.AsCString();
|
|
break;
|
|
case DW_AT_type:
|
|
param_type_die_form = form_value;
|
|
break;
|
|
case DW_AT_artificial:
|
|
is_artificial = form_value.Boolean();
|
|
break;
|
|
case DW_AT_location:
|
|
case DW_AT_const_value:
|
|
case DW_AT_default_value:
|
|
case DW_AT_description:
|
|
case DW_AT_endianity:
|
|
case DW_AT_is_optional:
|
|
case DW_AT_segment:
|
|
case DW_AT_variable_parameter:
|
|
default:
|
|
case DW_AT_abstract_origin:
|
|
case DW_AT_sibling:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool skip = false;
|
|
if (skip_artificial && is_artificial) {
|
|
// In order to determine if a C++ member function is "const" we
|
|
// have to look at the const-ness of "this"...
|
|
if (arg_idx == 0 &&
|
|
DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()) &&
|
|
// Often times compilers omit the "this" name for the
|
|
// specification DIEs, so we can't rely upon the name being in
|
|
// the formal parameter DIE...
|
|
(name == nullptr || ::strcmp(name, "this") == 0)) {
|
|
Type *this_type = die.ResolveTypeUID(param_type_die_form.Reference());
|
|
if (this_type) {
|
|
uint32_t encoding_mask = this_type->GetEncodingMask();
|
|
if (encoding_mask & Type::eEncodingIsPointerUID) {
|
|
is_static = false;
|
|
|
|
if (encoding_mask & (1u << Type::eEncodingIsConstUID))
|
|
type_quals |= clang::Qualifiers::Const;
|
|
if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
|
|
type_quals |= clang::Qualifiers::Volatile;
|
|
}
|
|
}
|
|
}
|
|
skip = true;
|
|
}
|
|
|
|
if (!skip) {
|
|
Type *type = die.ResolveTypeUID(param_type_die_form.Reference());
|
|
if (type) {
|
|
function_param_types.push_back(type->GetForwardCompilerType());
|
|
|
|
clang::ParmVarDecl *param_var_decl = m_ast.CreateParameterDeclaration(
|
|
containing_decl_ctx, GetOwningClangModule(die), name,
|
|
type->GetForwardCompilerType(), storage);
|
|
assert(param_var_decl);
|
|
function_param_decls.push_back(param_var_decl);
|
|
|
|
m_ast.SetMetadataAsUserID(param_var_decl, die.GetID());
|
|
}
|
|
}
|
|
arg_idx++;
|
|
} break;
|
|
|
|
case DW_TAG_unspecified_parameters:
|
|
is_variadic = true;
|
|
break;
|
|
|
|
case DW_TAG_template_type_parameter:
|
|
case DW_TAG_template_value_parameter:
|
|
case DW_TAG_GNU_template_parameter_pack:
|
|
// The one caller of this was never using the template_param_infos, and
|
|
// the local variable was taking up a large amount of stack space in
|
|
// SymbolFileDWARF::ParseType() so this was removed. If we ever need the
|
|
// template params back, we can add them back.
|
|
// ParseTemplateDIE (dwarf_cu, die, template_param_infos);
|
|
has_template_params = true;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return arg_idx;
|
|
}
|
|
|
|
clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) {
|
|
if (!die)
|
|
return nullptr;
|
|
|
|
switch (die.Tag()) {
|
|
case DW_TAG_variable:
|
|
case DW_TAG_constant:
|
|
case DW_TAG_formal_parameter:
|
|
case DW_TAG_imported_declaration:
|
|
case DW_TAG_imported_module:
|
|
break;
|
|
default:
|
|
return nullptr;
|
|
}
|
|
|
|
DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE());
|
|
if (cache_pos != m_die_to_decl.end())
|
|
return cache_pos->second;
|
|
|
|
if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) {
|
|
clang::Decl *decl = GetClangDeclForDIE(spec_die);
|
|
m_die_to_decl[die.GetDIE()] = decl;
|
|
return decl;
|
|
}
|
|
|
|
if (DWARFDIE abstract_origin_die =
|
|
die.GetReferencedDIE(DW_AT_abstract_origin)) {
|
|
clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die);
|
|
m_die_to_decl[die.GetDIE()] = decl;
|
|
return decl;
|
|
}
|
|
|
|
clang::Decl *decl = nullptr;
|
|
switch (die.Tag()) {
|
|
case DW_TAG_variable:
|
|
case DW_TAG_constant:
|
|
case DW_TAG_formal_parameter: {
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
Type *type = GetTypeForDIE(die);
|
|
if (dwarf && type) {
|
|
const char *name = die.GetName();
|
|
clang::DeclContext *decl_context =
|
|
TypeSystemClang::DeclContextGetAsDeclContext(
|
|
dwarf->GetDeclContextContainingUID(die.GetID()));
|
|
decl = m_ast.CreateVariableDeclaration(
|
|
decl_context, GetOwningClangModule(die), name,
|
|
ClangUtil::GetQualType(type->GetForwardCompilerType()));
|
|
}
|
|
break;
|
|
}
|
|
case DW_TAG_imported_declaration: {
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import);
|
|
if (imported_uid) {
|
|
CompilerDecl imported_decl = SymbolFileDWARF::GetDecl(imported_uid);
|
|
if (imported_decl) {
|
|
clang::DeclContext *decl_context =
|
|
TypeSystemClang::DeclContextGetAsDeclContext(
|
|
dwarf->GetDeclContextContainingUID(die.GetID()));
|
|
if (clang::NamedDecl *clang_imported_decl =
|
|
llvm::dyn_cast<clang::NamedDecl>(
|
|
(clang::Decl *)imported_decl.GetOpaqueDecl()))
|
|
decl = m_ast.CreateUsingDeclaration(
|
|
decl_context, OptionalClangModuleID(), clang_imported_decl);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case DW_TAG_imported_module: {
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import);
|
|
|
|
if (imported_uid) {
|
|
CompilerDeclContext imported_decl_ctx =
|
|
SymbolFileDWARF::GetDeclContext(imported_uid);
|
|
if (imported_decl_ctx) {
|
|
clang::DeclContext *decl_context =
|
|
TypeSystemClang::DeclContextGetAsDeclContext(
|
|
dwarf->GetDeclContextContainingUID(die.GetID()));
|
|
if (clang::NamespaceDecl *ns_decl =
|
|
TypeSystemClang::DeclContextGetAsNamespaceDecl(
|
|
imported_decl_ctx))
|
|
decl = m_ast.CreateUsingDirectiveDeclaration(
|
|
decl_context, OptionalClangModuleID(), ns_decl);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
m_die_to_decl[die.GetDIE()] = decl;
|
|
|
|
return decl;
|
|
}
|
|
|
|
clang::DeclContext *
|
|
DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) {
|
|
if (die) {
|
|
clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die);
|
|
if (decl_ctx)
|
|
return decl_ctx;
|
|
|
|
bool try_parsing_type = true;
|
|
switch (die.Tag()) {
|
|
case DW_TAG_compile_unit:
|
|
case DW_TAG_partial_unit:
|
|
decl_ctx = m_ast.GetTranslationUnitDecl();
|
|
try_parsing_type = false;
|
|
break;
|
|
|
|
case DW_TAG_namespace:
|
|
decl_ctx = ResolveNamespaceDIE(die);
|
|
try_parsing_type = false;
|
|
break;
|
|
|
|
case DW_TAG_imported_declaration:
|
|
decl_ctx = ResolveImportedDeclarationDIE(die);
|
|
try_parsing_type = false;
|
|
break;
|
|
|
|
case DW_TAG_lexical_block:
|
|
decl_ctx = GetDeclContextForBlock(die);
|
|
try_parsing_type = false;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (decl_ctx == nullptr && try_parsing_type) {
|
|
Type *type = die.GetDWARF()->ResolveType(die);
|
|
if (type)
|
|
decl_ctx = GetCachedClangDeclContextForDIE(die);
|
|
}
|
|
|
|
if (decl_ctx) {
|
|
LinkDeclContextToDIE(decl_ctx, die);
|
|
return decl_ctx;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
OptionalClangModuleID
|
|
DWARFASTParserClang::GetOwningClangModule(const DWARFDIE &die) {
|
|
if (!die.IsValid())
|
|
return {};
|
|
|
|
for (DWARFDIE parent = die.GetParent(); parent.IsValid();
|
|
parent = parent.GetParent()) {
|
|
const dw_tag_t tag = parent.Tag();
|
|
if (tag == DW_TAG_module) {
|
|
DWARFDIE module_die = parent;
|
|
auto it = m_die_to_module.find(module_die.GetDIE());
|
|
if (it != m_die_to_module.end())
|
|
return it->second;
|
|
const char *name =
|
|
module_die.GetAttributeValueAsString(DW_AT_name, nullptr);
|
|
if (!name)
|
|
return {};
|
|
|
|
OptionalClangModuleID id =
|
|
m_ast.GetOrCreateClangModule(name, GetOwningClangModule(module_die));
|
|
m_die_to_module.insert({module_die.GetDIE(), id});
|
|
return id;
|
|
}
|
|
}
|
|
return {};
|
|
}
|
|
|
|
static bool IsSubroutine(const DWARFDIE &die) {
|
|
switch (die.Tag()) {
|
|
case DW_TAG_subprogram:
|
|
case DW_TAG_inlined_subroutine:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) {
|
|
for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) {
|
|
if (IsSubroutine(candidate)) {
|
|
if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) {
|
|
return candidate;
|
|
} else {
|
|
return DWARFDIE();
|
|
}
|
|
}
|
|
}
|
|
assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on "
|
|
"something not in a function");
|
|
return DWARFDIE();
|
|
}
|
|
|
|
static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) {
|
|
for (DWARFDIE candidate : context.children()) {
|
|
if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) {
|
|
return candidate;
|
|
}
|
|
}
|
|
return DWARFDIE();
|
|
}
|
|
|
|
static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block,
|
|
const DWARFDIE &function) {
|
|
assert(IsSubroutine(function));
|
|
for (DWARFDIE context = block; context != function.GetParent();
|
|
context = context.GetParent()) {
|
|
assert(!IsSubroutine(context) || context == function);
|
|
if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) {
|
|
return child;
|
|
}
|
|
}
|
|
return DWARFDIE();
|
|
}
|
|
|
|
clang::DeclContext *
|
|
DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) {
|
|
assert(die.Tag() == DW_TAG_lexical_block);
|
|
DWARFDIE containing_function_with_abstract_origin =
|
|
GetContainingFunctionWithAbstractOrigin(die);
|
|
if (!containing_function_with_abstract_origin) {
|
|
return (clang::DeclContext *)ResolveBlockDIE(die);
|
|
}
|
|
DWARFDIE child = FindFirstChildWithAbstractOrigin(
|
|
die, containing_function_with_abstract_origin);
|
|
CompilerDeclContext decl_context =
|
|
GetDeclContextContainingUIDFromDWARF(child);
|
|
return (clang::DeclContext *)decl_context.GetOpaqueDeclContext();
|
|
}
|
|
|
|
clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) {
|
|
if (die && die.Tag() == DW_TAG_lexical_block) {
|
|
clang::BlockDecl *decl =
|
|
llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]);
|
|
|
|
if (!decl) {
|
|
DWARFDIE decl_context_die;
|
|
clang::DeclContext *decl_context =
|
|
GetClangDeclContextContainingDIE(die, &decl_context_die);
|
|
decl =
|
|
m_ast.CreateBlockDeclaration(decl_context, GetOwningClangModule(die));
|
|
|
|
if (decl)
|
|
LinkDeclContextToDIE((clang::DeclContext *)decl, die);
|
|
}
|
|
|
|
return decl;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
clang::NamespaceDecl *
|
|
DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) {
|
|
if (die && die.Tag() == DW_TAG_namespace) {
|
|
// See if we already parsed this namespace DIE and associated it with a
|
|
// uniqued namespace declaration
|
|
clang::NamespaceDecl *namespace_decl =
|
|
static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]);
|
|
if (namespace_decl)
|
|
return namespace_decl;
|
|
else {
|
|
const char *namespace_name = die.GetName();
|
|
clang::DeclContext *containing_decl_ctx =
|
|
GetClangDeclContextContainingDIE(die, nullptr);
|
|
bool is_inline =
|
|
die.GetAttributeValueAsUnsigned(DW_AT_export_symbols, 0) != 0;
|
|
|
|
namespace_decl = m_ast.GetUniqueNamespaceDeclaration(
|
|
namespace_name, containing_decl_ctx, GetOwningClangModule(die),
|
|
is_inline);
|
|
|
|
if (namespace_decl)
|
|
LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die);
|
|
return namespace_decl;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
clang::NamespaceDecl *
|
|
DWARFASTParserClang::ResolveImportedDeclarationDIE(const DWARFDIE &die) {
|
|
assert(die && die.Tag() == DW_TAG_imported_declaration);
|
|
|
|
// See if we cached a NamespaceDecl for this imported declaration
|
|
// already
|
|
auto it = m_die_to_decl_ctx.find(die.GetDIE());
|
|
if (it != m_die_to_decl_ctx.end())
|
|
return static_cast<clang::NamespaceDecl *>(it->getSecond());
|
|
|
|
clang::NamespaceDecl *namespace_decl = nullptr;
|
|
|
|
const DWARFDIE imported_uid =
|
|
die.GetAttributeValueAsReferenceDIE(DW_AT_import);
|
|
if (!imported_uid)
|
|
return nullptr;
|
|
|
|
switch (imported_uid.Tag()) {
|
|
case DW_TAG_imported_declaration:
|
|
namespace_decl = ResolveImportedDeclarationDIE(imported_uid);
|
|
break;
|
|
case DW_TAG_namespace:
|
|
namespace_decl = ResolveNamespaceDIE(imported_uid);
|
|
break;
|
|
default:
|
|
return nullptr;
|
|
}
|
|
|
|
if (!namespace_decl)
|
|
return nullptr;
|
|
|
|
LinkDeclContextToDIE(namespace_decl, die);
|
|
|
|
return namespace_decl;
|
|
}
|
|
|
|
clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE(
|
|
const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) {
|
|
SymbolFileDWARF *dwarf = die.GetDWARF();
|
|
|
|
DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die);
|
|
|
|
if (decl_ctx_die_copy)
|
|
*decl_ctx_die_copy = decl_ctx_die;
|
|
|
|
if (decl_ctx_die) {
|
|
clang::DeclContext *clang_decl_ctx =
|
|
GetClangDeclContextForDIE(decl_ctx_die);
|
|
if (clang_decl_ctx)
|
|
return clang_decl_ctx;
|
|
}
|
|
return m_ast.GetTranslationUnitDecl();
|
|
}
|
|
|
|
clang::DeclContext *
|
|
DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) {
|
|
if (die) {
|
|
DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE());
|
|
if (pos != m_die_to_decl_ctx.end())
|
|
return pos->second;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx,
|
|
const DWARFDIE &die) {
|
|
m_die_to_decl_ctx[die.GetDIE()] = decl_ctx;
|
|
// There can be many DIEs for a single decl context
|
|
// m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE());
|
|
m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die));
|
|
}
|
|
|
|
bool DWARFASTParserClang::CopyUniqueClassMethodTypes(
|
|
const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die,
|
|
lldb_private::Type *class_type, std::vector<DWARFDIE> &failures) {
|
|
if (!class_type || !src_class_die || !dst_class_die)
|
|
return false;
|
|
if (src_class_die.Tag() != dst_class_die.Tag())
|
|
return false;
|
|
|
|
// We need to complete the class type so we can get all of the method types
|
|
// parsed so we can then unique those types to their equivalent counterparts
|
|
// in "dst_cu" and "dst_class_die"
|
|
class_type->GetFullCompilerType();
|
|
|
|
auto gather = [](DWARFDIE die, UniqueCStringMap<DWARFDIE> &map,
|
|
UniqueCStringMap<DWARFDIE> &map_artificial) {
|
|
if (die.Tag() != DW_TAG_subprogram)
|
|
return;
|
|
// Make sure this is a declaration and not a concrete instance by looking
|
|
// for DW_AT_declaration set to 1. Sometimes concrete function instances are
|
|
// placed inside the class definitions and shouldn't be included in the list
|
|
// of things that are tracking here.
|
|
if (die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) != 1)
|
|
return;
|
|
|
|
if (const char *name = die.GetMangledName()) {
|
|
ConstString const_name(name);
|
|
if (die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0))
|
|
map_artificial.Append(const_name, die);
|
|
else
|
|
map.Append(const_name, die);
|
|
}
|
|
};
|
|
|
|
UniqueCStringMap<DWARFDIE> src_name_to_die;
|
|
UniqueCStringMap<DWARFDIE> dst_name_to_die;
|
|
UniqueCStringMap<DWARFDIE> src_name_to_die_artificial;
|
|
UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial;
|
|
for (DWARFDIE src_die = src_class_die.GetFirstChild(); src_die.IsValid();
|
|
src_die = src_die.GetSibling()) {
|
|
gather(src_die, src_name_to_die, src_name_to_die_artificial);
|
|
}
|
|
for (DWARFDIE dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid();
|
|
dst_die = dst_die.GetSibling()) {
|
|
gather(dst_die, dst_name_to_die, dst_name_to_die_artificial);
|
|
}
|
|
const uint32_t src_size = src_name_to_die.GetSize();
|
|
const uint32_t dst_size = dst_name_to_die.GetSize();
|
|
|
|
// Is everything kosher so we can go through the members at top speed?
|
|
bool fast_path = true;
|
|
|
|
if (src_size != dst_size)
|
|
fast_path = false;
|
|
|
|
uint32_t idx;
|
|
|
|
if (fast_path) {
|
|
for (idx = 0; idx < src_size; ++idx) {
|
|
DWARFDIE src_die = src_name_to_die.GetValueAtIndexUnchecked(idx);
|
|
DWARFDIE dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
|
|
|
|
if (src_die.Tag() != dst_die.Tag())
|
|
fast_path = false;
|
|
|
|
const char *src_name = src_die.GetMangledName();
|
|
const char *dst_name = dst_die.GetMangledName();
|
|
|
|
// Make sure the names match
|
|
if (src_name == dst_name || (strcmp(src_name, dst_name) == 0))
|
|
continue;
|
|
|
|
fast_path = false;
|
|
}
|
|
}
|
|
|
|
DWARFASTParserClang *src_dwarf_ast_parser =
|
|
static_cast<DWARFASTParserClang *>(
|
|
SymbolFileDWARF::GetDWARFParser(*src_class_die.GetCU()));
|
|
DWARFASTParserClang *dst_dwarf_ast_parser =
|
|
static_cast<DWARFASTParserClang *>(
|
|
SymbolFileDWARF::GetDWARFParser(*dst_class_die.GetCU()));
|
|
auto link = [&](DWARFDIE src, DWARFDIE dst) {
|
|
SymbolFileDWARF::DIEToTypePtr &die_to_type =
|
|
dst_class_die.GetDWARF()->GetDIEToType();
|
|
clang::DeclContext *dst_decl_ctx =
|
|
dst_dwarf_ast_parser->m_die_to_decl_ctx[dst.GetDIE()];
|
|
if (dst_decl_ctx)
|
|
src_dwarf_ast_parser->LinkDeclContextToDIE(dst_decl_ctx, src);
|
|
|
|
if (Type *src_child_type = die_to_type[src.GetDIE()])
|
|
die_to_type[dst.GetDIE()] = src_child_type;
|
|
};
|
|
|
|
// Now do the work of linking the DeclContexts and Types.
|
|
if (fast_path) {
|
|
// We can do this quickly. Just run across the tables index-for-index
|
|
// since we know each node has matching names and tags.
|
|
for (idx = 0; idx < src_size; ++idx) {
|
|
link(src_name_to_die.GetValueAtIndexUnchecked(idx),
|
|
dst_name_to_die.GetValueAtIndexUnchecked(idx));
|
|
}
|
|
} else {
|
|
// We must do this slowly. For each member of the destination, look up a
|
|
// member in the source with the same name, check its tag, and unique them
|
|
// if everything matches up. Report failures.
|
|
|
|
if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) {
|
|
src_name_to_die.Sort();
|
|
|
|
for (idx = 0; idx < dst_size; ++idx) {
|
|
ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx);
|
|
DWARFDIE dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
|
|
DWARFDIE src_die = src_name_to_die.Find(dst_name, DWARFDIE());
|
|
|
|
if (src_die && (src_die.Tag() == dst_die.Tag()))
|
|
link(src_die, dst_die);
|
|
else
|
|
failures.push_back(dst_die);
|
|
}
|
|
}
|
|
}
|
|
|
|
const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize();
|
|
const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize();
|
|
|
|
if (src_size_artificial && dst_size_artificial) {
|
|
dst_name_to_die_artificial.Sort();
|
|
|
|
for (idx = 0; idx < src_size_artificial; ++idx) {
|
|
ConstString src_name_artificial =
|
|
src_name_to_die_artificial.GetCStringAtIndex(idx);
|
|
DWARFDIE src_die =
|
|
src_name_to_die_artificial.GetValueAtIndexUnchecked(idx);
|
|
DWARFDIE dst_die =
|
|
dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE());
|
|
|
|
// Both classes have the artificial types, link them
|
|
if (dst_die)
|
|
link(src_die, dst_die);
|
|
}
|
|
}
|
|
|
|
if (dst_size_artificial) {
|
|
for (idx = 0; idx < dst_size_artificial; ++idx) {
|
|
failures.push_back(
|
|
dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx));
|
|
}
|
|
}
|
|
|
|
return !failures.empty();
|
|
}
|
|
|
|
bool DWARFASTParserClang::ShouldCreateUnnamedBitfield(
|
|
FieldInfo const &last_field_info, uint64_t last_field_end,
|
|
FieldInfo const &this_field_info,
|
|
lldb_private::ClangASTImporter::LayoutInfo const &layout_info) const {
|
|
// If we have a gap between the last_field_end and the current
|
|
// field we have an unnamed bit-field.
|
|
if (this_field_info.bit_offset <= last_field_end)
|
|
return false;
|
|
|
|
// If we have a base class, we assume there is no unnamed
|
|
// bit-field if either of the following is true:
|
|
// (a) this is the first field since the gap can be
|
|
// attributed to the members from the base class.
|
|
// FIXME: This assumption is not correct if the first field of
|
|
// the derived class is indeed an unnamed bit-field. We currently
|
|
// do not have the machinary to track the offset of the last field
|
|
// of classes we have seen before, so we are not handling this case.
|
|
// (b) Or, the first member of the derived class was a vtable pointer.
|
|
// In this case we don't want to create an unnamed bitfield either
|
|
// since those will be inserted by clang later.
|
|
const bool have_base = layout_info.base_offsets.size() != 0;
|
|
const bool this_is_first_field =
|
|
last_field_info.bit_offset == 0 && last_field_info.bit_size == 0;
|
|
const bool first_field_is_vptr =
|
|
last_field_info.bit_offset == 0 && last_field_info.IsArtificial();
|
|
|
|
if (have_base && (this_is_first_field || first_field_is_vptr))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
void DWARFASTParserClang::ParseRustVariantPart(
|
|
DWARFDIE &die, const DWARFDIE &parent_die, CompilerType &class_clang_type,
|
|
const lldb::AccessType default_accesibility,
|
|
ClangASTImporter::LayoutInfo &layout_info) {
|
|
assert(die.Tag() == llvm::dwarf::DW_TAG_variant_part);
|
|
assert(SymbolFileDWARF::GetLanguage(*die.GetCU()) ==
|
|
LanguageType::eLanguageTypeRust);
|
|
|
|
ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule();
|
|
|
|
VariantPart variants(die, parent_die, module_sp);
|
|
|
|
auto discriminant_type =
|
|
die.ResolveTypeUID(variants.discriminant().type_ref.Reference());
|
|
|
|
auto decl_context = m_ast.GetDeclContextForType(class_clang_type);
|
|
|
|
auto inner_holder = m_ast.CreateRecordType(
|
|
decl_context, OptionalClangModuleID(), lldb::eAccessPublic,
|
|
std::string(
|
|
llvm::formatv("{0}$Inner", class_clang_type.GetTypeName(false))),
|
|
llvm::to_underlying(clang::TagTypeKind::Union), lldb::eLanguageTypeRust);
|
|
m_ast.StartTagDeclarationDefinition(inner_holder);
|
|
m_ast.SetIsPacked(inner_holder);
|
|
|
|
for (auto member : variants.members()) {
|
|
|
|
auto has_discriminant = !member.IsDefault();
|
|
|
|
auto member_type = die.ResolveTypeUID(member.type_ref.Reference());
|
|
|
|
auto field_type = m_ast.CreateRecordType(
|
|
m_ast.GetDeclContextForType(inner_holder), OptionalClangModuleID(),
|
|
lldb::eAccessPublic,
|
|
std::string(llvm::formatv("{0}$Variant", member.GetName())),
|
|
llvm::to_underlying(clang::TagTypeKind::Struct),
|
|
lldb::eLanguageTypeRust);
|
|
|
|
m_ast.StartTagDeclarationDefinition(field_type);
|
|
auto offset = member.byte_offset;
|
|
|
|
if (has_discriminant) {
|
|
m_ast.AddFieldToRecordType(
|
|
field_type, "$discr$", discriminant_type->GetFullCompilerType(),
|
|
lldb::eAccessPublic, variants.discriminant().byte_offset);
|
|
offset += discriminant_type->GetByteSize(nullptr).value_or(0);
|
|
}
|
|
|
|
m_ast.AddFieldToRecordType(field_type, "value",
|
|
member_type->GetFullCompilerType(),
|
|
lldb::eAccessPublic, offset * 8);
|
|
|
|
m_ast.CompleteTagDeclarationDefinition(field_type);
|
|
|
|
auto name = has_discriminant
|
|
? llvm::formatv("$variant${0}", member.discr_value.value())
|
|
: std::string("$variant$");
|
|
|
|
auto variant_decl =
|
|
m_ast.AddFieldToRecordType(inner_holder, llvm::StringRef(name),
|
|
field_type, default_accesibility, 0);
|
|
|
|
layout_info.field_offsets.insert({variant_decl, 0});
|
|
}
|
|
|
|
auto inner_field = m_ast.AddFieldToRecordType(class_clang_type,
|
|
llvm::StringRef("$variants$"),
|
|
inner_holder, eAccessPublic, 0);
|
|
|
|
m_ast.CompleteTagDeclarationDefinition(inner_holder);
|
|
|
|
layout_info.field_offsets.insert({inner_field, 0});
|
|
}
|