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//===-- DWARFIndex.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 "Plugins/SymbolFile/DWARF/DWARFIndex.h"
#include "Plugins/Language/ObjC/ObjCLanguage.h"
#include "Plugins/SymbolFile/DWARF/DWARFDIE.h"
#include "Plugins/SymbolFile/DWARF/SymbolFileDWARF.h"
#include "lldb/Core/Module.h"
using namespace lldb_private;
using namespace lldb;
DWARFIndex::~DWARFIndex() = default;
bool DWARFIndex::ProcessFunctionDIE(
llvm::StringRef name, DIERef ref, SymbolFileDWARF &dwarf,
const CompilerDeclContext &parent_decl_ctx, uint32_t name_type_mask,
llvm::function_ref<bool(DWARFDIE die)> callback) {
DWARFDIE die = dwarf.GetDIE(ref);
if (!die) {
ReportInvalidDIERef(ref, name);
return true;
}
// Exit early if we're searching exclusively for methods or selectors and
// we have a context specified (no methods in namespaces).
uint32_t looking_for_nonmethods =
name_type_mask & ~(eFunctionNameTypeMethod | eFunctionNameTypeSelector);
if (!looking_for_nonmethods && parent_decl_ctx.IsValid())
return true;
// Otherwise, we need to also check that the context matches. If it does not
// match, we do nothing.
if (!SymbolFileDWARF::DIEInDeclContext(parent_decl_ctx, die))
return true;
// In case of a full match, we just insert everything we find.
if (name_type_mask & eFunctionNameTypeFull)
return callback(die);
// If looking for ObjC selectors, we need to also check if the name is a
// possible selector.
if (name_type_mask & eFunctionNameTypeSelector &&
ObjCLanguage::IsPossibleObjCMethodName(die.GetName()))
return callback(die);
bool looking_for_methods = name_type_mask & lldb::eFunctionNameTypeMethod;
bool looking_for_functions = name_type_mask & lldb::eFunctionNameTypeBase;
if (looking_for_methods || looking_for_functions) {
// If we're looking for either methods or functions, we definitely want this
// die. Otherwise, only keep it if the die type matches what we are
// searching for.
if ((looking_for_methods && looking_for_functions) ||
looking_for_methods == die.IsMethod())
return callback(die);
}
return true;
}
DWARFIndex::DIERefCallbackImpl::DIERefCallbackImpl(
const DWARFIndex &index, llvm::function_ref<bool(DWARFDIE die)> callback,
llvm::StringRef name)
: m_index(index),
m_dwarf(*llvm::cast<SymbolFileDWARF>(index.m_module.GetSymbolFile())),
m_callback(callback), m_name(name) {}
bool DWARFIndex::DIERefCallbackImpl::operator()(DIERef ref) const {
if (DWARFDIE die = m_dwarf.GetDIE(ref))
return m_callback(die);
m_index.ReportInvalidDIERef(ref, m_name);
return true;
}
void DWARFIndex::ReportInvalidDIERef(DIERef ref, llvm::StringRef name) const {
m_module.ReportErrorIfModifyDetected(
"the DWARF debug information has been modified (accelerator table had "
"bad die 0x%8.8x for '%s')\n",
ref.die_offset(), name.str().c_str());
}
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