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16711b431b
`clang -g -gpubnames` (with optional -gsplit-dwarf) creates the
`.debug_names` section ("per-CU" index). By default lld concatenates
input `.debug_names` sections into an output `.debug_names` section.
LLDB can consume the concatenated section but the lookup performance is
not good.
This patch adds --debug-names to create a per-module index by combining
the per-CU indexes into a single index that covers the entire load
module. The produced `.debug_names` is a replacement for `.gdb_index`.
Type units (-fdebug-types-section) are not handled yet.
Co-authored-by: Fangrui Song <i@maskray.me>
---------
Co-authored-by: Fangrui Song <i@maskray.me>
105 lines
3.1 KiB
C++
105 lines
3.1 KiB
C++
//===- DWARF.h -----------------------------------------------*- C++ -*-===//
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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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#ifndef LLD_ELF_DWARF_H
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#define LLD_ELF_DWARF_H
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#include "InputFiles.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/STLFunctionalExtras.h"
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#include "llvm/DebugInfo/DWARF/DWARFContext.h"
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#include "llvm/Object/ELF.h"
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#include <optional>
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namespace lld::elf {
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class InputSection;
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struct LLDDWARFSection final : public llvm::DWARFSection {
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InputSectionBase *sec = nullptr;
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};
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template <class ELFT> class LLDDwarfObj final : public llvm::DWARFObject {
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public:
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explicit LLDDwarfObj(ObjFile<ELFT> *obj);
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void forEachInfoSections(
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llvm::function_ref<void(const llvm::DWARFSection &)> f) const override {
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f(infoSection);
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}
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InputSection *getInfoSection() const {
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return cast<InputSection>(infoSection.sec);
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}
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const llvm::DWARFSection &getAddrSection() const override {
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return addrSection;
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}
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const llvm::DWARFSection &getLineSection() const override {
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return lineSection;
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}
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const llvm::DWARFSection &getLoclistsSection() const override {
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return loclistsSection;
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}
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const llvm::DWARFSection &getRangesSection() const override {
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return rangesSection;
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}
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const llvm::DWARFSection &getRnglistsSection() const override {
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return rnglistsSection;
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}
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const llvm::DWARFSection &getStrOffsetsSection() const override {
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return strOffsetsSection;
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}
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const LLDDWARFSection &getGnuPubnamesSection() const override {
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return gnuPubnamesSection;
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}
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const LLDDWARFSection &getGnuPubtypesSection() const override {
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return gnuPubtypesSection;
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}
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const LLDDWARFSection &getNamesSection() const override {
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return namesSection;
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}
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StringRef getFileName() const override { return ""; }
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StringRef getAbbrevSection() const override { return abbrevSection; }
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StringRef getStrSection() const override { return strSection; }
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StringRef getLineStrSection() const override { return lineStrSection; }
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bool isLittleEndian() const override {
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return ELFT::Endianness == llvm::endianness::little;
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}
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std::optional<llvm::RelocAddrEntry> find(const llvm::DWARFSection &sec,
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uint64_t pos) const override;
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private:
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template <class RelTy>
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std::optional<llvm::RelocAddrEntry> findAux(const InputSectionBase &sec,
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uint64_t pos,
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ArrayRef<RelTy> rels) const;
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LLDDWARFSection addrSection;
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LLDDWARFSection gnuPubnamesSection;
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LLDDWARFSection gnuPubtypesSection;
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LLDDWARFSection infoSection;
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LLDDWARFSection lineSection;
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LLDDWARFSection loclistsSection;
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LLDDWARFSection namesSection;
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LLDDWARFSection rangesSection;
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LLDDWARFSection rnglistsSection;
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LLDDWARFSection strOffsetsSection;
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StringRef abbrevSection;
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StringRef lineStrSection;
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StringRef strSection;
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};
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} // namespace lld::elf
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#endif
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