4d5c9ad9c3
All the new code should match the behavior of the old exactly. Of note, the custom queries used to be implemented inside `HashedNameToDIE.cpp` (which is the LLDB implementation of the tables). However, when porting to LLVM, we believe they don't belong inside the LLVM table implementation: 1. They don't require any knowledge about the table itself 2. They are not relevant for other users of these classes. 3. They use LLDB data structures. As such, we implement these custom queries inside AppleDWARFIndex.cpp. Types and Objective-C tables are done separately, as they have slightly different functionality that require rewriting more code. Differential Revision: https://reviews.llvm.org/D153866
114 lines
4.3 KiB
C++
114 lines
4.3 KiB
C++
//===-- DWARFIndex.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 "Plugins/SymbolFile/DWARF/DWARFIndex.h"
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#include "Plugins/Language/ObjC/ObjCLanguage.h"
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#include "Plugins/SymbolFile/DWARF/DWARFDIE.h"
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#include "Plugins/SymbolFile/DWARF/SymbolFileDWARF.h"
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#include "lldb/Core/Mangled.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Target/Language.h"
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using namespace lldb_private;
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using namespace lldb;
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DWARFIndex::~DWARFIndex() = default;
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bool DWARFIndex::ProcessFunctionDIE(
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const Module::LookupInfo &lookup_info, DIERef ref, SymbolFileDWARF &dwarf,
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const CompilerDeclContext &parent_decl_ctx,
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llvm::function_ref<bool(DWARFDIE die)> callback) {
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llvm::StringRef name = lookup_info.GetLookupName().GetStringRef();
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FunctionNameType name_type_mask = lookup_info.GetNameTypeMask();
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DWARFDIE die = dwarf.GetDIE(ref);
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if (!die) {
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ReportInvalidDIERef(ref, name);
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return true;
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}
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if (!(name_type_mask & eFunctionNameTypeFull)) {
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ConstString name_to_match_against;
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if (const char *mangled_die_name = die.GetMangledName()) {
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name_to_match_against = ConstString(mangled_die_name);
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} else {
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SymbolFileDWARF *symbols = die.GetDWARF();
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if (ConstString demangled_die_name =
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symbols->ConstructFunctionDemangledName(die))
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name_to_match_against = demangled_die_name;
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}
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if (!lookup_info.NameMatchesLookupInfo(name_to_match_against,
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lookup_info.GetLanguageType()))
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return true;
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}
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// Exit early if we're searching exclusively for methods or selectors and
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// we have a context specified (no methods in namespaces).
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uint32_t looking_for_nonmethods =
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name_type_mask & ~(eFunctionNameTypeMethod | eFunctionNameTypeSelector);
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if (!looking_for_nonmethods && parent_decl_ctx.IsValid())
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return true;
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// Otherwise, we need to also check that the context matches. If it does not
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// match, we do nothing.
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if (!SymbolFileDWARF::DIEInDeclContext(parent_decl_ctx, die))
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return true;
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// In case of a full match, we just insert everything we find.
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if (name_type_mask & eFunctionNameTypeFull && die.GetMangledName() == name)
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return callback(die);
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// If looking for ObjC selectors, we need to also check if the name is a
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// possible selector.
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if (name_type_mask & eFunctionNameTypeSelector &&
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ObjCLanguage::IsPossibleObjCMethodName(die.GetName()))
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return callback(die);
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bool looking_for_methods = name_type_mask & lldb::eFunctionNameTypeMethod;
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bool looking_for_functions = name_type_mask & lldb::eFunctionNameTypeBase;
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if (looking_for_methods || looking_for_functions) {
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// If we're looking for either methods or functions, we definitely want this
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// die. Otherwise, only keep it if the die type matches what we are
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// searching for.
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if ((looking_for_methods && looking_for_functions) ||
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looking_for_methods == die.IsMethod())
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return callback(die);
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}
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return true;
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}
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DWARFIndex::DIERefCallbackImpl::DIERefCallbackImpl(
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const DWARFIndex &index, llvm::function_ref<bool(DWARFDIE die)> callback,
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llvm::StringRef name)
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: m_index(index),
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m_dwarf(*llvm::cast<SymbolFileDWARF>(
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index.m_module.GetSymbolFile()->GetBackingSymbolFile())),
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m_callback(callback), m_name(name) {}
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bool DWARFIndex::DIERefCallbackImpl::operator()(DIERef ref) const {
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if (DWARFDIE die = m_dwarf.GetDIE(ref))
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return m_callback(die);
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m_index.ReportInvalidDIERef(ref, m_name);
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return true;
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}
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bool DWARFIndex::DIERefCallbackImpl::operator()(
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const llvm::AppleAcceleratorTable::Entry &entry) const {
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return this->operator()(DIERef(std::nullopt, DIERef::Section::DebugInfo,
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*entry.getDIESectionOffset()));
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}
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void DWARFIndex::ReportInvalidDIERef(DIERef ref, llvm::StringRef name) const {
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m_module.ReportErrorIfModifyDetected(
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"the DWARF debug information has been modified (accelerator table had "
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"bad die {0:x16} for '{1}')\n",
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ref.die_offset(), name.str().c_str());
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}
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