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//===-- SymbolFileDWARFDwo.cpp --------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "SymbolFileDWARFDwo.h"
#include "lldb/Core/Section.h"
#include "lldb/Expression/DWARFExpression.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Utility/LLDBAssert.h"
#include "llvm/Support/Casting.h"
#include "DWARFCompileUnit.h"
#include "DWARFDebugInfo.h"
#include "DWARFUnit.h"
using namespace lldb;
using namespace lldb_private;
char SymbolFileDWARFDwo::ID;
SymbolFileDWARFDwo::SymbolFileDWARFDwo(SymbolFileDWARF &base_symbol_file,
ObjectFileSP objfile, uint32_t id)
: SymbolFileDWARF(objfile, objfile->GetSectionList(
/*update_module_section_list*/ false)),
m_base_symbol_file(base_symbol_file) {
SetID(user_id_t(id) << 32);
// Parsing of the dwarf unit index is not thread-safe, so we need to prime it
// to enable subsequent concurrent lookups.
m_context.GetAsLLVM().getCUIndex();
}
DWARFCompileUnit *SymbolFileDWARFDwo::GetDWOCompileUnitForHash(uint64_t hash) {
if (const llvm::DWARFUnitIndex &index = m_context.GetAsLLVM().getCUIndex()) {
if (const llvm::DWARFUnitIndex::Entry *entry = index.getFromHash(hash)) {
if (auto *unit_contrib = entry->getContribution())
return llvm::dyn_cast_or_null<DWARFCompileUnit>(
DebugInfo().GetUnitAtOffset(DIERef::Section::DebugInfo,
unit_contrib->Offset));
}
return nullptr;
}
DWARFCompileUnit *cu = FindSingleCompileUnit();
if (!cu)
return nullptr;
if (hash !=
cu->GetUnitDIEOnly().GetAttributeValueAsUnsigned(DW_AT_GNU_dwo_id, 0))
return nullptr;
return cu;
}
DWARFCompileUnit *SymbolFileDWARFDwo::FindSingleCompileUnit() {
DWARFDebugInfo &debug_info = DebugInfo();
// Right now we only support dwo files with one compile unit. If we don't have
// type units, we can just check for the unit count.
if (!debug_info.ContainsTypeUnits() && debug_info.GetNumUnits() == 1)
return llvm::cast<DWARFCompileUnit>(debug_info.GetUnitAtIndex(0));
// Otherwise, we have to run through all units, and find the compile unit that
// way.
DWARFCompileUnit *cu = nullptr;
for (size_t i = 0; i < debug_info.GetNumUnits(); ++i) {
if (auto *candidate =
llvm::dyn_cast<DWARFCompileUnit>(debug_info.GetUnitAtIndex(i))) {
if (cu)
return nullptr; // More that one CU found.
cu = candidate;
}
}
return cu;
}
SymbolFileDWARF::DIEToTypePtr &SymbolFileDWARFDwo::GetDIEToType() {
return GetBaseSymbolFile().GetDIEToType();
}
SymbolFileDWARF::DIEToVariableSP &SymbolFileDWARFDwo::GetDIEToVariable() {
return GetBaseSymbolFile().GetDIEToVariable();
}
SymbolFileDWARF::DIEToClangType &
SymbolFileDWARFDwo::GetForwardDeclDieToClangType() {
return GetBaseSymbolFile().GetForwardDeclDieToClangType();
}
SymbolFileDWARF::ClangTypeToDIE &
SymbolFileDWARFDwo::GetForwardDeclClangTypeToDie() {
return GetBaseSymbolFile().GetForwardDeclClangTypeToDie();
}
void SymbolFileDWARFDwo::GetObjCMethods(
lldb_private::ConstString class_name,
llvm::function_ref<bool(DWARFDIE die)> callback) {
GetBaseSymbolFile().GetObjCMethods(class_name, callback);
}
UniqueDWARFASTTypeMap &SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap() {
return GetBaseSymbolFile().GetUniqueDWARFASTTypeMap();
}
lldb::TypeSP SymbolFileDWARFDwo::FindDefinitionTypeForDWARFDeclContext(
const DWARFDeclContext &die_decl_ctx) {
return GetBaseSymbolFile().FindDefinitionTypeForDWARFDeclContext(
die_decl_ctx);
}
lldb::TypeSP SymbolFileDWARFDwo::FindCompleteObjCDefinitionTypeForDIE(
const DWARFDIE &die, lldb_private::ConstString type_name,
bool must_be_implementation) {
return GetBaseSymbolFile().FindCompleteObjCDefinitionTypeForDIE(
die, type_name, must_be_implementation);
}
llvm::Expected<TypeSystem &>
SymbolFileDWARFDwo::GetTypeSystemForLanguage(LanguageType language) {
return GetBaseSymbolFile().GetTypeSystemForLanguage(language);
}
DWARFDIE
SymbolFileDWARFDwo::GetDIE(const DIERef &die_ref) {
if (die_ref.dwo_num() == GetDwoNum())
return DebugInfo().GetDIE(die_ref);
return GetBaseSymbolFile().GetDIE(die_ref);
}
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