[DWP] Refactoring llvm-dwp in to a library.
This is a step1, mechanical refactor, of moving the bulk of llvm-dwp functionality in to a library. This should allow other tools, like BOLT, to re-use some of the llvm-dwp functionality. Reviewed By: dblaikie Differential Revision: https://reviews.llvm.org/D106198
This commit is contained in:
Alexander Yermolovich
@@ -1,18 +1,11 @@
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set(LLVM_LINK_COMPONENTS
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AllTargetsAsmParsers
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AllTargetsCodeGens
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AllTargetsDescs
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AllTargetsInfos
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AsmPrinter
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DebugInfoDWARF
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MC
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Object
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Support
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Target
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)
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add_llvm_tool(llvm-dwp
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llvm-dwp.cpp
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DWP.cpp
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DWPError.cpp
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DEPENDS
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810
llvm/tools/llvm-dwp/DWP.cpp
Normal file
810
llvm/tools/llvm-dwp/DWP.cpp
Normal file
@@ -0,0 +1,810 @@
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//===-- llvm-dwp.cpp - Split DWARF merging tool for llvm ------------------===//
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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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//
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// A utility for merging DWARF 5 Split DWARF .dwo files into .dwp (DWARF
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// package files).
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//
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//===----------------------------------------------------------------------===//
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#include "DWP.h"
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#include "DWPError.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/MCTargetOptionsCommandFlags.h"
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#include "llvm/Object/Decompressor.h"
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using namespace llvm;
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using namespace llvm::object;
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static mc::RegisterMCTargetOptionsFlags MCTargetOptionsFlags;
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// Returns the size of debug_str_offsets section headers in bytes.
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static uint64_t debugStrOffsetsHeaderSize(DataExtractor StrOffsetsData,
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uint16_t DwarfVersion) {
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if (DwarfVersion <= 4)
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return 0; // There is no header before dwarf 5.
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uint64_t Offset = 0;
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uint64_t Length = StrOffsetsData.getU32(&Offset);
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if (Length == llvm::dwarf::DW_LENGTH_DWARF64)
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return 16; // unit length: 12 bytes, version: 2 bytes, padding: 2 bytes.
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return 8; // unit length: 4 bytes, version: 2 bytes, padding: 2 bytes.
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}
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static uint64_t getCUAbbrev(StringRef Abbrev, uint64_t AbbrCode) {
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uint64_t Offset = 0;
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DataExtractor AbbrevData(Abbrev, true, 0);
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while (AbbrevData.getULEB128(&Offset) != AbbrCode) {
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// Tag
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AbbrevData.getULEB128(&Offset);
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// DW_CHILDREN
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AbbrevData.getU8(&Offset);
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// Attributes
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while (AbbrevData.getULEB128(&Offset) | AbbrevData.getULEB128(&Offset))
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;
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}
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return Offset;
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}
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static Expected<const char *>
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getIndexedString(dwarf::Form Form, DataExtractor InfoData, uint64_t &InfoOffset,
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StringRef StrOffsets, StringRef Str, uint16_t Version) {
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if (Form == dwarf::DW_FORM_string)
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return InfoData.getCStr(&InfoOffset);
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uint64_t StrIndex;
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switch (Form) {
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case dwarf::DW_FORM_strx1:
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StrIndex = InfoData.getU8(&InfoOffset);
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break;
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case dwarf::DW_FORM_strx2:
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StrIndex = InfoData.getU16(&InfoOffset);
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break;
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case dwarf::DW_FORM_strx3:
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StrIndex = InfoData.getU24(&InfoOffset);
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break;
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case dwarf::DW_FORM_strx4:
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StrIndex = InfoData.getU32(&InfoOffset);
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break;
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case dwarf::DW_FORM_strx:
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case dwarf::DW_FORM_GNU_str_index:
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StrIndex = InfoData.getULEB128(&InfoOffset);
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break;
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default:
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return make_error<DWPError>(
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"string field must be encoded with one of the following: "
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"DW_FORM_string, DW_FORM_strx, DW_FORM_strx1, DW_FORM_strx2, "
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"DW_FORM_strx3, DW_FORM_strx4, or DW_FORM_GNU_str_index.");
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}
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DataExtractor StrOffsetsData(StrOffsets, true, 0);
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uint64_t StrOffsetsOffset = 4 * StrIndex;
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StrOffsetsOffset += debugStrOffsetsHeaderSize(StrOffsetsData, Version);
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uint64_t StrOffset = StrOffsetsData.getU32(&StrOffsetsOffset);
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DataExtractor StrData(Str, true, 0);
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return StrData.getCStr(&StrOffset);
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}
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static Expected<CompileUnitIdentifiers>
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getCUIdentifiers(InfoSectionUnitHeader &Header, StringRef Abbrev,
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StringRef Info, StringRef StrOffsets, StringRef Str) {
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DataExtractor InfoData(Info, true, 0);
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uint64_t Offset = Header.HeaderSize;
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if (Header.Version >= 5 && Header.UnitType != dwarf::DW_UT_split_compile)
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return make_error<DWPError>(
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std::string("unit type DW_UT_split_compile type not found in "
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"debug_info header. Unexpected unit type 0x" +
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utostr(Header.UnitType) + " found"));
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CompileUnitIdentifiers ID;
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uint32_t AbbrCode = InfoData.getULEB128(&Offset);
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DataExtractor AbbrevData(Abbrev, true, 0);
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uint64_t AbbrevOffset = getCUAbbrev(Abbrev, AbbrCode);
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auto Tag = static_cast<dwarf::Tag>(AbbrevData.getULEB128(&AbbrevOffset));
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if (Tag != dwarf::DW_TAG_compile_unit)
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return make_error<DWPError>("top level DIE is not a compile unit");
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// DW_CHILDREN
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AbbrevData.getU8(&AbbrevOffset);
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uint32_t Name;
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dwarf::Form Form;
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while ((Name = AbbrevData.getULEB128(&AbbrevOffset)) |
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(Form = static_cast<dwarf::Form>(
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AbbrevData.getULEB128(&AbbrevOffset))) &&
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(Name != 0 || Form != 0)) {
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switch (Name) {
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case dwarf::DW_AT_name: {
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Expected<const char *> EName = getIndexedString(
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Form, InfoData, Offset, StrOffsets, Str, Header.Version);
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if (!EName)
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return EName.takeError();
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ID.Name = *EName;
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break;
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}
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case dwarf::DW_AT_GNU_dwo_name:
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case dwarf::DW_AT_dwo_name: {
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Expected<const char *> EName = getIndexedString(
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Form, InfoData, Offset, StrOffsets, Str, Header.Version);
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if (!EName)
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return EName.takeError();
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ID.DWOName = *EName;
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break;
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}
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case dwarf::DW_AT_GNU_dwo_id:
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Header.Signature = InfoData.getU64(&Offset);
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break;
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default:
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DWARFFormValue::skipValue(
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Form, InfoData, &Offset,
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dwarf::FormParams({Header.Version, Header.AddrSize, Header.Format}));
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}
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}
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if (!Header.Signature)
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return make_error<DWPError>("compile unit missing dwo_id");
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ID.Signature = *Header.Signature;
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return ID;
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}
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static bool isSupportedSectionKind(DWARFSectionKind Kind) {
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return Kind != DW_SECT_EXT_unknown;
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}
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namespace llvm {
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// Convert an internal section identifier into the index to use with
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// UnitIndexEntry::Contributions.
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unsigned getContributionIndex(DWARFSectionKind Kind, uint32_t IndexVersion) {
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assert(serializeSectionKind(Kind, IndexVersion) >= DW_SECT_INFO);
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return serializeSectionKind(Kind, IndexVersion) - DW_SECT_INFO;
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}
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} // namespace llvm
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// Convert a UnitIndexEntry::Contributions index to the corresponding on-disk
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// value of the section identifier.
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static unsigned getOnDiskSectionId(unsigned Index) {
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return Index + DW_SECT_INFO;
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}
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static StringRef getSubsection(StringRef Section,
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const DWARFUnitIndex::Entry &Entry,
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DWARFSectionKind Kind) {
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const auto *Off = Entry.getContribution(Kind);
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if (!Off)
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return StringRef();
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return Section.substr(Off->Offset, Off->Length);
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}
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static void
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addAllTypesFromDWP(MCStreamer &Out,
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MapVector<uint64_t, UnitIndexEntry> &TypeIndexEntries,
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const DWARFUnitIndex &TUIndex, MCSection *OutputTypes,
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StringRef Types, const UnitIndexEntry &TUEntry,
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uint32_t &TypesOffset, unsigned TypesContributionIndex) {
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Out.SwitchSection(OutputTypes);
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for (const DWARFUnitIndex::Entry &E : TUIndex.getRows()) {
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auto *I = E.getContributions();
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if (!I)
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continue;
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auto P = TypeIndexEntries.insert(std::make_pair(E.getSignature(), TUEntry));
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if (!P.second)
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continue;
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auto &Entry = P.first->second;
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// Zero out the debug_info contribution
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Entry.Contributions[0] = {};
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for (auto Kind : TUIndex.getColumnKinds()) {
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if (!isSupportedSectionKind(Kind))
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continue;
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auto &C =
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Entry.Contributions[getContributionIndex(Kind, TUIndex.getVersion())];
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C.Offset += I->Offset;
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C.Length = I->Length;
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++I;
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}
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auto &C = Entry.Contributions[TypesContributionIndex];
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Out.emitBytes(Types.substr(
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C.Offset - TUEntry.Contributions[TypesContributionIndex].Offset,
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C.Length));
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C.Offset = TypesOffset;
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TypesOffset += C.Length;
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}
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}
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static void addAllTypesFromTypesSection(
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MCStreamer &Out, MapVector<uint64_t, UnitIndexEntry> &TypeIndexEntries,
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MCSection *OutputTypes, const std::vector<StringRef> &TypesSections,
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const UnitIndexEntry &CUEntry, uint32_t &TypesOffset) {
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for (StringRef Types : TypesSections) {
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Out.SwitchSection(OutputTypes);
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uint64_t Offset = 0;
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DataExtractor Data(Types, true, 0);
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while (Data.isValidOffset(Offset)) {
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UnitIndexEntry Entry = CUEntry;
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// Zero out the debug_info contribution
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Entry.Contributions[0] = {};
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auto &C = Entry.Contributions[getContributionIndex(DW_SECT_EXT_TYPES, 2)];
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C.Offset = TypesOffset;
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auto PrevOffset = Offset;
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// Length of the unit, including the 4 byte length field.
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C.Length = Data.getU32(&Offset) + 4;
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Data.getU16(&Offset); // Version
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Data.getU32(&Offset); // Abbrev offset
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Data.getU8(&Offset); // Address size
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auto Signature = Data.getU64(&Offset);
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Offset = PrevOffset + C.Length;
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auto P = TypeIndexEntries.insert(std::make_pair(Signature, Entry));
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if (!P.second)
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continue;
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Out.emitBytes(Types.substr(PrevOffset, C.Length));
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TypesOffset += C.Length;
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}
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}
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}
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static std::string buildDWODescription(StringRef Name, StringRef DWPName,
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StringRef DWOName) {
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std::string Text = "\'";
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Text += Name;
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Text += '\'';
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if (!DWPName.empty()) {
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Text += " (from ";
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if (!DWOName.empty()) {
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Text += '\'';
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Text += DWOName;
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Text += "' in ";
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}
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Text += '\'';
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Text += DWPName;
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Text += "')";
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}
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return Text;
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}
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static Error createError(StringRef Name, Error E) {
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return make_error<DWPError>(
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("failure while decompressing compressed section: '" + Name + "', " +
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llvm::toString(std::move(E)))
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.str());
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}
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static Error
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handleCompressedSection(std::deque<SmallString<32>> &UncompressedSections,
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StringRef &Name, StringRef &Contents) {
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if (!Decompressor::isGnuStyle(Name))
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return Error::success();
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Expected<Decompressor> Dec =
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Decompressor::create(Name, Contents, false /*IsLE*/, false /*Is64Bit*/);
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if (!Dec)
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return createError(Name, Dec.takeError());
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UncompressedSections.emplace_back();
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if (Error E = Dec->resizeAndDecompress(UncompressedSections.back()))
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return createError(Name, std::move(E));
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Name = Name.substr(2); // Drop ".z"
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Contents = UncompressedSections.back();
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return Error::success();
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}
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namespace llvm {
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// Parse and return the header of an info section compile/type unit.
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Expected<InfoSectionUnitHeader> parseInfoSectionUnitHeader(StringRef Info) {
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InfoSectionUnitHeader Header;
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Error Err = Error::success();
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uint64_t Offset = 0;
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DWARFDataExtractor InfoData(Info, true, 0);
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std::tie(Header.Length, Header.Format) =
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InfoData.getInitialLength(&Offset, &Err);
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if (Err)
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return make_error<DWPError>("cannot parse compile unit length: " +
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llvm::toString(std::move(Err)));
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if (!InfoData.isValidOffset(Offset + (Header.Length - 1))) {
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return make_error<DWPError>(
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"compile unit exceeds .debug_info section range: " +
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utostr(Offset + Header.Length) + " >= " + utostr(InfoData.size()));
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}
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Header.Version = InfoData.getU16(&Offset, &Err);
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if (Err)
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return make_error<DWPError>("cannot parse compile unit version: " +
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llvm::toString(std::move(Err)));
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uint64_t MinHeaderLength;
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if (Header.Version >= 5) {
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// Size: Version (2), UnitType (1), AddrSize (1), DebugAbbrevOffset (4),
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// Signature (8)
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MinHeaderLength = 16;
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} else {
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// Size: Version (2), DebugAbbrevOffset (4), AddrSize (1)
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MinHeaderLength = 7;
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}
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if (Header.Length < MinHeaderLength) {
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return make_error<DWPError>("unit length is too small: expected at least " +
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utostr(MinHeaderLength) + " got " +
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utostr(Header.Length) + ".");
|
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}
|
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if (Header.Version >= 5) {
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Header.UnitType = InfoData.getU8(&Offset);
|
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Header.AddrSize = InfoData.getU8(&Offset);
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Header.DebugAbbrevOffset = InfoData.getU32(&Offset);
|
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Header.Signature = InfoData.getU64(&Offset);
|
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if (Header.UnitType == dwarf::DW_UT_split_type) {
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// Type offset.
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MinHeaderLength += 4;
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if (Header.Length < MinHeaderLength)
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return make_error<DWPError>("type unit is missing type offset");
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InfoData.getU32(&Offset);
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}
|
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} else {
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// Note that, address_size and debug_abbrev_offset fields have switched
|
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// places between dwarf version 4 and 5.
|
||||
Header.DebugAbbrevOffset = InfoData.getU32(&Offset);
|
||||
Header.AddrSize = InfoData.getU8(&Offset);
|
||||
}
|
||||
|
||||
Header.HeaderSize = Offset;
|
||||
return Header;
|
||||
}
|
||||
|
||||
void writeStringsAndOffsets(MCStreamer &Out, DWPStringPool &Strings,
|
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MCSection *StrOffsetSection,
|
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StringRef CurStrSection,
|
||||
StringRef CurStrOffsetSection, uint16_t Version) {
|
||||
// Could possibly produce an error or warning if one of these was non-null but
|
||||
// the other was null.
|
||||
if (CurStrSection.empty() || CurStrOffsetSection.empty())
|
||||
return;
|
||||
|
||||
DenseMap<uint64_t, uint32_t> OffsetRemapping;
|
||||
|
||||
DataExtractor Data(CurStrSection, true, 0);
|
||||
uint64_t LocalOffset = 0;
|
||||
uint64_t PrevOffset = 0;
|
||||
while (const char *S = Data.getCStr(&LocalOffset)) {
|
||||
OffsetRemapping[PrevOffset] =
|
||||
Strings.getOffset(S, LocalOffset - PrevOffset);
|
||||
PrevOffset = LocalOffset;
|
||||
}
|
||||
|
||||
Data = DataExtractor(CurStrOffsetSection, true, 0);
|
||||
|
||||
Out.SwitchSection(StrOffsetSection);
|
||||
|
||||
uint64_t HeaderSize = debugStrOffsetsHeaderSize(Data, Version);
|
||||
uint64_t Offset = 0;
|
||||
uint64_t Size = CurStrOffsetSection.size();
|
||||
// FIXME: This can be caused by bad input and should be handled as such.
|
||||
assert(HeaderSize <= Size && "StrOffsetSection size is less than its header");
|
||||
// Copy the header to the output.
|
||||
Out.emitBytes(Data.getBytes(&Offset, HeaderSize));
|
||||
while (Offset < Size) {
|
||||
auto OldOffset = Data.getU32(&Offset);
|
||||
auto NewOffset = OffsetRemapping[OldOffset];
|
||||
Out.emitIntValue(NewOffset, 4);
|
||||
}
|
||||
}
|
||||
|
||||
void writeIndexTable(
|
||||
MCStreamer &Out, ArrayRef<unsigned> ContributionOffsets,
|
||||
const MapVector<uint64_t, UnitIndexEntry> &IndexEntries,
|
||||
uint32_t DWARFUnitIndex::Entry::SectionContribution::*Field) {
|
||||
for (const auto &E : IndexEntries)
|
||||
for (size_t I = 0; I != array_lengthof(E.second.Contributions); ++I)
|
||||
if (ContributionOffsets[I])
|
||||
Out.emitIntValue(E.second.Contributions[I].*Field, 4);
|
||||
}
|
||||
|
||||
void writeIndex(MCStreamer &Out, MCSection *Section,
|
||||
ArrayRef<unsigned> ContributionOffsets,
|
||||
const MapVector<uint64_t, UnitIndexEntry> &IndexEntries,
|
||||
uint32_t IndexVersion) {
|
||||
if (IndexEntries.empty())
|
||||
return;
|
||||
|
||||
unsigned Columns = 0;
|
||||
for (auto &C : ContributionOffsets)
|
||||
if (C)
|
||||
++Columns;
|
||||
|
||||
std::vector<unsigned> Buckets(NextPowerOf2(3 * IndexEntries.size() / 2));
|
||||
uint64_t Mask = Buckets.size() - 1;
|
||||
size_t I = 0;
|
||||
for (const auto &P : IndexEntries) {
|
||||
auto S = P.first;
|
||||
auto H = S & Mask;
|
||||
auto HP = ((S >> 32) & Mask) | 1;
|
||||
while (Buckets[H]) {
|
||||
assert(S != IndexEntries.begin()[Buckets[H] - 1].first &&
|
||||
"Duplicate unit");
|
||||
H = (H + HP) & Mask;
|
||||
}
|
||||
Buckets[H] = I + 1;
|
||||
++I;
|
||||
}
|
||||
|
||||
Out.SwitchSection(Section);
|
||||
Out.emitIntValue(IndexVersion, 4); // Version
|
||||
Out.emitIntValue(Columns, 4); // Columns
|
||||
Out.emitIntValue(IndexEntries.size(), 4); // Num Units
|
||||
Out.emitIntValue(Buckets.size(), 4); // Num Buckets
|
||||
|
||||
// Write the signatures.
|
||||
for (const auto &I : Buckets)
|
||||
Out.emitIntValue(I ? IndexEntries.begin()[I - 1].first : 0, 8);
|
||||
|
||||
// Write the indexes.
|
||||
for (const auto &I : Buckets)
|
||||
Out.emitIntValue(I, 4);
|
||||
|
||||
// Write the column headers (which sections will appear in the table)
|
||||
for (size_t I = 0; I != ContributionOffsets.size(); ++I)
|
||||
if (ContributionOffsets[I])
|
||||
Out.emitIntValue(getOnDiskSectionId(I), 4);
|
||||
|
||||
// Write the offsets.
|
||||
writeIndexTable(Out, ContributionOffsets, IndexEntries,
|
||||
&DWARFUnitIndex::Entry::SectionContribution::Offset);
|
||||
|
||||
// Write the lengths.
|
||||
writeIndexTable(Out, ContributionOffsets, IndexEntries,
|
||||
&DWARFUnitIndex::Entry::SectionContribution::Length);
|
||||
}
|
||||
|
||||
Error buildDuplicateError(const std::pair<uint64_t, UnitIndexEntry> &PrevE,
|
||||
const CompileUnitIdentifiers &ID, StringRef DWPName) {
|
||||
return make_error<DWPError>(
|
||||
std::string("duplicate DWO ID (") + utohexstr(PrevE.first) + ") in " +
|
||||
buildDWODescription(PrevE.second.Name, PrevE.second.DWPName,
|
||||
PrevE.second.DWOName) +
|
||||
" and " + buildDWODescription(ID.Name, DWPName, ID.DWOName));
|
||||
}
|
||||
|
||||
Error handleSection(
|
||||
const StringMap<std::pair<MCSection *, DWARFSectionKind>> &KnownSections,
|
||||
const MCSection *StrSection, const MCSection *StrOffsetSection,
|
||||
const MCSection *TypesSection, const MCSection *CUIndexSection,
|
||||
const MCSection *TUIndexSection, const MCSection *InfoSection,
|
||||
const SectionRef &Section, MCStreamer &Out,
|
||||
std::deque<SmallString<32>> &UncompressedSections,
|
||||
uint32_t (&ContributionOffsets)[8], UnitIndexEntry &CurEntry,
|
||||
StringRef &CurStrSection, StringRef &CurStrOffsetSection,
|
||||
std::vector<StringRef> &CurTypesSection,
|
||||
std::vector<StringRef> &CurInfoSection, StringRef &AbbrevSection,
|
||||
StringRef &CurCUIndexSection, StringRef &CurTUIndexSection,
|
||||
std::vector<std::pair<DWARFSectionKind, uint32_t>> &SectionLength) {
|
||||
if (Section.isBSS())
|
||||
return Error::success();
|
||||
|
||||
if (Section.isVirtual())
|
||||
return Error::success();
|
||||
|
||||
Expected<StringRef> NameOrErr = Section.getName();
|
||||
if (!NameOrErr)
|
||||
return NameOrErr.takeError();
|
||||
StringRef Name = *NameOrErr;
|
||||
|
||||
Expected<StringRef> ContentsOrErr = Section.getContents();
|
||||
if (!ContentsOrErr)
|
||||
return ContentsOrErr.takeError();
|
||||
StringRef Contents = *ContentsOrErr;
|
||||
|
||||
if (auto Err = handleCompressedSection(UncompressedSections, Name, Contents))
|
||||
return Err;
|
||||
|
||||
Name = Name.substr(Name.find_first_not_of("._"));
|
||||
|
||||
auto SectionPair = KnownSections.find(Name);
|
||||
if (SectionPair == KnownSections.end())
|
||||
return Error::success();
|
||||
|
||||
if (DWARFSectionKind Kind = SectionPair->second.second) {
|
||||
if (Kind != DW_SECT_EXT_TYPES && Kind != DW_SECT_INFO) {
|
||||
SectionLength.push_back(std::make_pair(Kind, Contents.size()));
|
||||
}
|
||||
|
||||
if (Kind == DW_SECT_ABBREV) {
|
||||
AbbrevSection = Contents;
|
||||
}
|
||||
}
|
||||
|
||||
MCSection *OutSection = SectionPair->second.first;
|
||||
if (OutSection == StrOffsetSection)
|
||||
CurStrOffsetSection = Contents;
|
||||
else if (OutSection == StrSection)
|
||||
CurStrSection = Contents;
|
||||
else if (OutSection == TypesSection)
|
||||
CurTypesSection.push_back(Contents);
|
||||
else if (OutSection == CUIndexSection)
|
||||
CurCUIndexSection = Contents;
|
||||
else if (OutSection == TUIndexSection)
|
||||
CurTUIndexSection = Contents;
|
||||
else if (OutSection == InfoSection)
|
||||
CurInfoSection.push_back(Contents);
|
||||
else {
|
||||
Out.SwitchSection(OutSection);
|
||||
Out.emitBytes(Contents);
|
||||
}
|
||||
return Error::success();
|
||||
}
|
||||
|
||||
Error write(MCStreamer &Out, ArrayRef<std::string> Inputs) {
|
||||
const auto &MCOFI = *Out.getContext().getObjectFileInfo();
|
||||
MCSection *const StrSection = MCOFI.getDwarfStrDWOSection();
|
||||
MCSection *const StrOffsetSection = MCOFI.getDwarfStrOffDWOSection();
|
||||
MCSection *const TypesSection = MCOFI.getDwarfTypesDWOSection();
|
||||
MCSection *const CUIndexSection = MCOFI.getDwarfCUIndexSection();
|
||||
MCSection *const TUIndexSection = MCOFI.getDwarfTUIndexSection();
|
||||
MCSection *const InfoSection = MCOFI.getDwarfInfoDWOSection();
|
||||
const StringMap<std::pair<MCSection *, DWARFSectionKind>> KnownSections = {
|
||||
{"debug_info.dwo", {InfoSection, DW_SECT_INFO}},
|
||||
{"debug_types.dwo", {MCOFI.getDwarfTypesDWOSection(), DW_SECT_EXT_TYPES}},
|
||||
{"debug_str_offsets.dwo", {StrOffsetSection, DW_SECT_STR_OFFSETS}},
|
||||
{"debug_str.dwo", {StrSection, static_cast<DWARFSectionKind>(0)}},
|
||||
{"debug_loc.dwo", {MCOFI.getDwarfLocDWOSection(), DW_SECT_EXT_LOC}},
|
||||
{"debug_line.dwo", {MCOFI.getDwarfLineDWOSection(), DW_SECT_LINE}},
|
||||
{"debug_macro.dwo", {MCOFI.getDwarfMacroDWOSection(), DW_SECT_MACRO}},
|
||||
{"debug_abbrev.dwo", {MCOFI.getDwarfAbbrevDWOSection(), DW_SECT_ABBREV}},
|
||||
{"debug_loclists.dwo",
|
||||
{MCOFI.getDwarfLoclistsDWOSection(), DW_SECT_LOCLISTS}},
|
||||
{"debug_rnglists.dwo",
|
||||
{MCOFI.getDwarfRnglistsDWOSection(), DW_SECT_RNGLISTS}},
|
||||
{"debug_cu_index", {CUIndexSection, static_cast<DWARFSectionKind>(0)}},
|
||||
{"debug_tu_index", {TUIndexSection, static_cast<DWARFSectionKind>(0)}}};
|
||||
|
||||
MapVector<uint64_t, UnitIndexEntry> IndexEntries;
|
||||
MapVector<uint64_t, UnitIndexEntry> TypeIndexEntries;
|
||||
|
||||
uint32_t ContributionOffsets[8] = {};
|
||||
uint16_t Version = 0;
|
||||
uint32_t IndexVersion = 0;
|
||||
|
||||
DWPStringPool Strings(Out, StrSection);
|
||||
|
||||
SmallVector<OwningBinary<object::ObjectFile>, 128> Objects;
|
||||
Objects.reserve(Inputs.size());
|
||||
|
||||
std::deque<SmallString<32>> UncompressedSections;
|
||||
|
||||
for (const auto &Input : Inputs) {
|
||||
auto ErrOrObj = object::ObjectFile::createObjectFile(Input);
|
||||
if (!ErrOrObj)
|
||||
return ErrOrObj.takeError();
|
||||
|
||||
auto &Obj = *ErrOrObj->getBinary();
|
||||
Objects.push_back(std::move(*ErrOrObj));
|
||||
|
||||
UnitIndexEntry CurEntry = {};
|
||||
|
||||
StringRef CurStrSection;
|
||||
StringRef CurStrOffsetSection;
|
||||
std::vector<StringRef> CurTypesSection;
|
||||
std::vector<StringRef> CurInfoSection;
|
||||
StringRef AbbrevSection;
|
||||
StringRef CurCUIndexSection;
|
||||
StringRef CurTUIndexSection;
|
||||
|
||||
// This maps each section contained in this file to its length.
|
||||
// This information is later on used to calculate the contributions,
|
||||
// i.e. offset and length, of each compile/type unit to a section.
|
||||
std::vector<std::pair<DWARFSectionKind, uint32_t>> SectionLength;
|
||||
|
||||
for (const auto &Section : Obj.sections())
|
||||
if (auto Err = handleSection(
|
||||
KnownSections, StrSection, StrOffsetSection, TypesSection,
|
||||
CUIndexSection, TUIndexSection, InfoSection, Section, Out,
|
||||
UncompressedSections, ContributionOffsets, CurEntry,
|
||||
CurStrSection, CurStrOffsetSection, CurTypesSection,
|
||||
CurInfoSection, AbbrevSection, CurCUIndexSection,
|
||||
CurTUIndexSection, SectionLength))
|
||||
return Err;
|
||||
|
||||
if (CurInfoSection.empty())
|
||||
continue;
|
||||
|
||||
Expected<InfoSectionUnitHeader> HeaderOrErr =
|
||||
parseInfoSectionUnitHeader(CurInfoSection.front());
|
||||
if (!HeaderOrErr)
|
||||
return HeaderOrErr.takeError();
|
||||
InfoSectionUnitHeader &Header = *HeaderOrErr;
|
||||
|
||||
if (Version == 0) {
|
||||
Version = Header.Version;
|
||||
IndexVersion = Version < 5 ? 2 : 5;
|
||||
} else if (Version != Header.Version) {
|
||||
return make_error<DWPError>("incompatible DWARF compile unit versions.");
|
||||
}
|
||||
|
||||
writeStringsAndOffsets(Out, Strings, StrOffsetSection, CurStrSection,
|
||||
CurStrOffsetSection, Header.Version);
|
||||
|
||||
for (auto Pair : SectionLength) {
|
||||
auto Index = getContributionIndex(Pair.first, IndexVersion);
|
||||
CurEntry.Contributions[Index].Offset = ContributionOffsets[Index];
|
||||
ContributionOffsets[Index] +=
|
||||
(CurEntry.Contributions[Index].Length = Pair.second);
|
||||
}
|
||||
|
||||
uint32_t &InfoSectionOffset =
|
||||
ContributionOffsets[getContributionIndex(DW_SECT_INFO, IndexVersion)];
|
||||
if (CurCUIndexSection.empty()) {
|
||||
bool FoundCUUnit = false;
|
||||
Out.SwitchSection(InfoSection);
|
||||
for (StringRef Info : CurInfoSection) {
|
||||
uint64_t UnitOffset = 0;
|
||||
while (Info.size() > UnitOffset) {
|
||||
Expected<InfoSectionUnitHeader> HeaderOrError =
|
||||
parseInfoSectionUnitHeader(Info.substr(UnitOffset, Info.size()));
|
||||
if (!HeaderOrError)
|
||||
return HeaderOrError.takeError();
|
||||
InfoSectionUnitHeader &Header = *HeaderOrError;
|
||||
|
||||
UnitIndexEntry Entry = CurEntry;
|
||||
auto &C = Entry.Contributions[getContributionIndex(DW_SECT_INFO,
|
||||
IndexVersion)];
|
||||
C.Offset = InfoSectionOffset;
|
||||
C.Length = Header.Length + 4;
|
||||
UnitOffset += C.Length;
|
||||
if (Header.Version < 5 ||
|
||||
Header.UnitType == dwarf::DW_UT_split_compile) {
|
||||
Expected<CompileUnitIdentifiers> EID =
|
||||
getCUIdentifiers(Header, AbbrevSection,
|
||||
Info.substr(UnitOffset - C.Length, C.Length),
|
||||
CurStrOffsetSection, CurStrSection);
|
||||
|
||||
if (!EID)
|
||||
return createFileError(Input, EID.takeError());
|
||||
const auto &ID = *EID;
|
||||
auto P = IndexEntries.insert(std::make_pair(ID.Signature, Entry));
|
||||
if (!P.second)
|
||||
return buildDuplicateError(*P.first, ID, "");
|
||||
P.first->second.Name = ID.Name;
|
||||
P.first->second.DWOName = ID.DWOName;
|
||||
|
||||
FoundCUUnit = true;
|
||||
} else if (Header.UnitType == dwarf::DW_UT_split_type) {
|
||||
auto P = TypeIndexEntries.insert(
|
||||
std::make_pair(Header.Signature.getValue(), Entry));
|
||||
if (!P.second)
|
||||
continue;
|
||||
}
|
||||
Out.emitBytes(Info.substr(UnitOffset - C.Length, C.Length));
|
||||
InfoSectionOffset += C.Length;
|
||||
}
|
||||
}
|
||||
|
||||
if (!FoundCUUnit)
|
||||
return make_error<DWPError>("no compile unit found in file: " + Input);
|
||||
|
||||
if (IndexVersion == 2) {
|
||||
// Add types from the .debug_types section from DWARF < 5.
|
||||
addAllTypesFromTypesSection(
|
||||
Out, TypeIndexEntries, TypesSection, CurTypesSection, CurEntry,
|
||||
ContributionOffsets[getContributionIndex(DW_SECT_EXT_TYPES, 2)]);
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
if (CurInfoSection.size() != 1)
|
||||
return make_error<DWPError>("expected exactly one occurrence of a debug "
|
||||
"info section in a .dwp file");
|
||||
StringRef DwpSingleInfoSection = CurInfoSection.front();
|
||||
|
||||
DWARFUnitIndex CUIndex(DW_SECT_INFO);
|
||||
DataExtractor CUIndexData(CurCUIndexSection, Obj.isLittleEndian(), 0);
|
||||
if (!CUIndex.parse(CUIndexData))
|
||||
return make_error<DWPError>("failed to parse cu_index");
|
||||
if (CUIndex.getVersion() != IndexVersion)
|
||||
return make_error<DWPError>("incompatible cu_index versions, found " +
|
||||
utostr(CUIndex.getVersion()) +
|
||||
" and expecting " + utostr(IndexVersion));
|
||||
|
||||
Out.SwitchSection(InfoSection);
|
||||
for (const DWARFUnitIndex::Entry &E : CUIndex.getRows()) {
|
||||
auto *I = E.getContributions();
|
||||
if (!I)
|
||||
continue;
|
||||
auto P = IndexEntries.insert(std::make_pair(E.getSignature(), CurEntry));
|
||||
StringRef CUInfoSection =
|
||||
getSubsection(DwpSingleInfoSection, E, DW_SECT_INFO);
|
||||
Expected<InfoSectionUnitHeader> HeaderOrError =
|
||||
parseInfoSectionUnitHeader(CUInfoSection);
|
||||
if (!HeaderOrError)
|
||||
return HeaderOrError.takeError();
|
||||
InfoSectionUnitHeader &Header = *HeaderOrError;
|
||||
|
||||
Expected<CompileUnitIdentifiers> EID = getCUIdentifiers(
|
||||
Header, getSubsection(AbbrevSection, E, DW_SECT_ABBREV),
|
||||
CUInfoSection,
|
||||
getSubsection(CurStrOffsetSection, E, DW_SECT_STR_OFFSETS),
|
||||
CurStrSection);
|
||||
if (!EID)
|
||||
return createFileError(Input, EID.takeError());
|
||||
const auto &ID = *EID;
|
||||
if (!P.second)
|
||||
return buildDuplicateError(*P.first, ID, Input);
|
||||
auto &NewEntry = P.first->second;
|
||||
NewEntry.Name = ID.Name;
|
||||
NewEntry.DWOName = ID.DWOName;
|
||||
NewEntry.DWPName = Input;
|
||||
for (auto Kind : CUIndex.getColumnKinds()) {
|
||||
if (!isSupportedSectionKind(Kind))
|
||||
continue;
|
||||
auto &C =
|
||||
NewEntry.Contributions[getContributionIndex(Kind, IndexVersion)];
|
||||
C.Offset += I->Offset;
|
||||
C.Length = I->Length;
|
||||
++I;
|
||||
}
|
||||
unsigned Index = getContributionIndex(DW_SECT_INFO, IndexVersion);
|
||||
auto &C = NewEntry.Contributions[Index];
|
||||
Out.emitBytes(CUInfoSection);
|
||||
C.Offset = InfoSectionOffset;
|
||||
InfoSectionOffset += C.Length;
|
||||
}
|
||||
|
||||
if (!CurTUIndexSection.empty()) {
|
||||
llvm::DWARFSectionKind TUSectionKind;
|
||||
MCSection *OutSection;
|
||||
StringRef TypeInputSection;
|
||||
// Write type units into debug info section for DWARFv5.
|
||||
if (Version >= 5) {
|
||||
TUSectionKind = DW_SECT_INFO;
|
||||
OutSection = InfoSection;
|
||||
TypeInputSection = DwpSingleInfoSection;
|
||||
} else {
|
||||
// Write type units into debug types section for DWARF < 5.
|
||||
if (CurTypesSection.size() != 1)
|
||||
return make_error<DWPError>(
|
||||
"multiple type unit sections in .dwp file");
|
||||
|
||||
TUSectionKind = DW_SECT_EXT_TYPES;
|
||||
OutSection = TypesSection;
|
||||
TypeInputSection = CurTypesSection.front();
|
||||
}
|
||||
|
||||
DWARFUnitIndex TUIndex(TUSectionKind);
|
||||
DataExtractor TUIndexData(CurTUIndexSection, Obj.isLittleEndian(), 0);
|
||||
if (!TUIndex.parse(TUIndexData))
|
||||
return make_error<DWPError>("failed to parse tu_index");
|
||||
if (TUIndex.getVersion() != IndexVersion)
|
||||
return make_error<DWPError>("incompatible tu_index versions, found " +
|
||||
utostr(TUIndex.getVersion()) +
|
||||
" and expecting " + utostr(IndexVersion));
|
||||
|
||||
unsigned TypesContributionIndex =
|
||||
getContributionIndex(TUSectionKind, IndexVersion);
|
||||
addAllTypesFromDWP(Out, TypeIndexEntries, TUIndex, OutSection,
|
||||
TypeInputSection, CurEntry,
|
||||
ContributionOffsets[TypesContributionIndex],
|
||||
TypesContributionIndex);
|
||||
}
|
||||
}
|
||||
|
||||
if (Version < 5) {
|
||||
// Lie about there being no info contributions so the TU index only includes
|
||||
// the type unit contribution for DWARF < 5. In DWARFv5 the TU index has a
|
||||
// contribution to the info section, so we do not want to lie about it.
|
||||
ContributionOffsets[0] = 0;
|
||||
}
|
||||
writeIndex(Out, MCOFI.getDwarfTUIndexSection(), ContributionOffsets,
|
||||
TypeIndexEntries, IndexVersion);
|
||||
|
||||
if (Version < 5) {
|
||||
// Lie about the type contribution for DWARF < 5. In DWARFv5 the type
|
||||
// section does not exist, so no need to do anything about this.
|
||||
ContributionOffsets[getContributionIndex(DW_SECT_EXT_TYPES, 2)] = 0;
|
||||
// Unlie about the info contribution
|
||||
ContributionOffsets[0] = 1;
|
||||
}
|
||||
|
||||
writeIndex(Out, MCOFI.getDwarfCUIndexSection(), ContributionOffsets,
|
||||
IndexEntries, IndexVersion);
|
||||
|
||||
return Error::success();
|
||||
}
|
||||
} // namespace llvm
|
||||
97
llvm/tools/llvm-dwp/DWP.h
Normal file
97
llvm/tools/llvm-dwp/DWP.h
Normal file
@@ -0,0 +1,97 @@
|
||||
#ifndef LLVM_TOOLS_LLVM_DWP_DWP_H
|
||||
#define LLVM_TOOLS_LLVM_DWP_DWP_H
|
||||
|
||||
#include "DWPStringPool.h"
|
||||
#include "llvm/ADT/ArrayRef.h"
|
||||
#include "llvm/ADT/MapVector.h"
|
||||
#include "llvm/ADT/StringRef.h"
|
||||
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
|
||||
#include "llvm/DebugInfo/DWARF/DWARFUnitIndex.h"
|
||||
#include "llvm/MC/MCSection.h"
|
||||
#include "llvm/MC/MCStreamer.h"
|
||||
#include "llvm/Object/ObjectFile.h"
|
||||
#include "llvm/Support/Error.h"
|
||||
#include <deque>
|
||||
#include <vector>
|
||||
|
||||
namespace llvm {
|
||||
struct UnitIndexEntry {
|
||||
DWARFUnitIndex::Entry::SectionContribution Contributions[8];
|
||||
std::string Name;
|
||||
std::string DWOName;
|
||||
StringRef DWPName;
|
||||
};
|
||||
|
||||
// Holds data for Skeleton, Split Compilation, and Type Unit Headers (only in
|
||||
// v5) as defined in Dwarf 5 specification, 7.5.1.2, 7.5.1.3 and Dwarf 4
|
||||
// specification 7.5.1.1.
|
||||
struct InfoSectionUnitHeader {
|
||||
// unit_length field. Note that the type is uint64_t even in 32-bit dwarf.
|
||||
uint64_t Length = 0;
|
||||
|
||||
// version field.
|
||||
uint16_t Version = 0;
|
||||
|
||||
// unit_type field. Initialized only if Version >= 5.
|
||||
uint8_t UnitType = 0;
|
||||
|
||||
// address_size field.
|
||||
uint8_t AddrSize = 0;
|
||||
|
||||
// debug_abbrev_offset field. Note that the type is uint64_t even in 32-bit
|
||||
// dwarf. It is assumed to be 0.
|
||||
uint64_t DebugAbbrevOffset = 0;
|
||||
|
||||
// dwo_id field. This resides in the header only if Version >= 5.
|
||||
// In earlier versions, it is read from DW_AT_GNU_dwo_id.
|
||||
Optional<uint64_t> Signature = None;
|
||||
|
||||
// Derived from the length of Length field.
|
||||
dwarf::DwarfFormat Format = dwarf::DwarfFormat::DWARF32;
|
||||
|
||||
// The size of the Header in bytes. This is derived while parsing the header,
|
||||
// and is stored as a convenience.
|
||||
uint8_t HeaderSize = 0;
|
||||
};
|
||||
|
||||
struct CompileUnitIdentifiers {
|
||||
uint64_t Signature = 0;
|
||||
const char *Name = "";
|
||||
const char *DWOName = "";
|
||||
};
|
||||
|
||||
Error write(MCStreamer &Out, ArrayRef<std::string> Inputs);
|
||||
|
||||
unsigned getContributionIndex(DWARFSectionKind Kind, uint32_t IndexVersion);
|
||||
|
||||
Error handleSection(
|
||||
const StringMap<std::pair<MCSection *, DWARFSectionKind>> &KnownSections,
|
||||
const MCSection *StrSection, const MCSection *StrOffsetSection,
|
||||
const MCSection *TypesSection, const MCSection *CUIndexSection,
|
||||
const MCSection *TUIndexSection, const MCSection *InfoSection,
|
||||
const object::SectionRef &Section, MCStreamer &Out,
|
||||
std::deque<SmallString<32>> &UncompressedSections,
|
||||
uint32_t (&ContributionOffsets)[8], UnitIndexEntry &CurEntry,
|
||||
StringRef &CurStrSection, StringRef &CurStrOffsetSection,
|
||||
std::vector<StringRef> &CurTypesSection,
|
||||
std::vector<StringRef> &CurInfoSection, StringRef &AbbrevSection,
|
||||
StringRef &CurCUIndexSection, StringRef &CurTUIndexSection,
|
||||
std::vector<std::pair<DWARFSectionKind, uint32_t>> &SectionLength);
|
||||
|
||||
Expected<InfoSectionUnitHeader> parseInfoSectionUnitHeader(StringRef Info);
|
||||
|
||||
void writeStringsAndOffsets(MCStreamer &Out, DWPStringPool &Strings,
|
||||
MCSection *StrOffsetSection,
|
||||
StringRef CurStrSection,
|
||||
StringRef CurStrOffsetSection, uint16_t Version);
|
||||
|
||||
Error buildDuplicateError(const std::pair<uint64_t, UnitIndexEntry> &PrevE,
|
||||
const CompileUnitIdentifiers &ID, StringRef DWPName);
|
||||
|
||||
void writeIndex(MCStreamer &Out, MCSection *Section,
|
||||
ArrayRef<unsigned> ContributionOffsets,
|
||||
const MapVector<uint64_t, UnitIndexEntry> &IndexEntries,
|
||||
uint32_t IndexVersion);
|
||||
|
||||
} // namespace llvm
|
||||
#endif // LLVM_TOOLS_LLVM_DWP_DWP_H
|
||||
@@ -18,6 +18,6 @@ public:
|
||||
private:
|
||||
std::string Info;
|
||||
};
|
||||
}
|
||||
} // namespace llvm
|
||||
|
||||
#endif
|
||||
|
||||
@@ -51,6 +51,6 @@ public:
|
||||
return Pair.first->second;
|
||||
}
|
||||
};
|
||||
}
|
||||
} // namespace llvm
|
||||
|
||||
#endif
|
||||
|
||||
@@ -10,40 +10,22 @@
|
||||
// package files).
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
#include "DWP.h"
|
||||
#include "DWPError.h"
|
||||
#include "DWPStringPool.h"
|
||||
#include "llvm/ADT/MapVector.h"
|
||||
#include "llvm/ADT/Optional.h"
|
||||
#include "llvm/ADT/STLExtras.h"
|
||||
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
|
||||
#include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
|
||||
#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
|
||||
#include "llvm/DebugInfo/DWARF/DWARFUnitIndex.h"
|
||||
#include "llvm/MC/MCAsmBackend.h"
|
||||
#include "llvm/MC/MCAsmInfo.h"
|
||||
#include "llvm/MC/MCCodeEmitter.h"
|
||||
#include "llvm/MC/MCContext.h"
|
||||
#include "llvm/MC/MCInstrInfo.h"
|
||||
#include "llvm/MC/MCObjectFileInfo.h"
|
||||
#include "llvm/MC/MCObjectWriter.h"
|
||||
#include "llvm/MC/MCRegisterInfo.h"
|
||||
#include "llvm/MC/MCStreamer.h"
|
||||
#include "llvm/MC/MCTargetOptionsCommandFlags.h"
|
||||
#include "llvm/Object/Decompressor.h"
|
||||
#include "llvm/Object/ObjectFile.h"
|
||||
#include "llvm/Support/CommandLine.h"
|
||||
#include "llvm/Support/DataExtractor.h"
|
||||
#include "llvm/Support/Error.h"
|
||||
#include "llvm/Support/FileSystem.h"
|
||||
#include "llvm/Support/InitLLVM.h"
|
||||
#include "llvm/Support/MathExtras.h"
|
||||
#include "llvm/Support/MemoryBuffer.h"
|
||||
#include "llvm/Support/Path.h"
|
||||
#include "llvm/Support/TargetRegistry.h"
|
||||
#include "llvm/Support/TargetSelect.h"
|
||||
#include "llvm/Support/ToolOutputFile.h"
|
||||
#include "llvm/Support/WithColor.h"
|
||||
#include "llvm/Support/raw_ostream.h"
|
||||
|
||||
using namespace llvm;
|
||||
using namespace llvm::object;
|
||||
@@ -65,561 +47,6 @@ static cl::opt<std::string> OutputFilename(cl::Required, "o",
|
||||
cl::value_desc("filename"),
|
||||
cl::cat(DwpCategory));
|
||||
|
||||
// Returns the size of debug_str_offsets section headers in bytes.
|
||||
static uint64_t debugStrOffsetsHeaderSize(DataExtractor StrOffsetsData,
|
||||
uint16_t DwarfVersion) {
|
||||
if (DwarfVersion <= 4)
|
||||
return 0; // There is no header before dwarf 5.
|
||||
uint64_t Offset = 0;
|
||||
uint64_t Length = StrOffsetsData.getU32(&Offset);
|
||||
if (Length == llvm::dwarf::DW_LENGTH_DWARF64)
|
||||
return 16; // unit length: 12 bytes, version: 2 bytes, padding: 2 bytes.
|
||||
return 8; // unit length: 4 bytes, version: 2 bytes, padding: 2 bytes.
|
||||
}
|
||||
|
||||
// Holds data for Skeleton, Split Compilation, and Type Unit Headers (only in
|
||||
// v5) as defined in Dwarf 5 specification, 7.5.1.2, 7.5.1.3 and Dwarf 4
|
||||
// specification 7.5.1.1.
|
||||
struct InfoSectionUnitHeader {
|
||||
// unit_length field. Note that the type is uint64_t even in 32-bit dwarf.
|
||||
uint64_t Length = 0;
|
||||
|
||||
// version field.
|
||||
uint16_t Version = 0;
|
||||
|
||||
// unit_type field. Initialized only if Version >= 5.
|
||||
uint8_t UnitType = 0;
|
||||
|
||||
// address_size field.
|
||||
uint8_t AddrSize = 0;
|
||||
|
||||
// debug_abbrev_offset field. Note that the type is uint64_t even in 32-bit
|
||||
// dwarf. It is assumed to be 0.
|
||||
uint64_t DebugAbbrevOffset = 0;
|
||||
|
||||
// dwo_id field. This resides in the header only if Version >= 5.
|
||||
// In earlier versions, it is read from DW_AT_GNU_dwo_id.
|
||||
Optional<uint64_t> Signature = None;
|
||||
|
||||
// Derived from the length of Length field.
|
||||
dwarf::DwarfFormat Format = dwarf::DwarfFormat::DWARF32;
|
||||
|
||||
// The size of the Header in bytes. This is derived while parsing the header,
|
||||
// and is stored as a convenience.
|
||||
uint8_t HeaderSize = 0;
|
||||
};
|
||||
|
||||
// Parse and return the header of an info section compile/type unit.
|
||||
static Expected<InfoSectionUnitHeader>
|
||||
parseInfoSectionUnitHeader(StringRef Info) {
|
||||
InfoSectionUnitHeader Header;
|
||||
Error Err = Error::success();
|
||||
uint64_t Offset = 0;
|
||||
DWARFDataExtractor InfoData(Info, true, 0);
|
||||
std::tie(Header.Length, Header.Format) =
|
||||
InfoData.getInitialLength(&Offset, &Err);
|
||||
if (Err)
|
||||
return make_error<DWPError>("cannot parse compile unit length: " +
|
||||
llvm::toString(std::move(Err)));
|
||||
|
||||
if (!InfoData.isValidOffset(Offset + (Header.Length - 1))) {
|
||||
return make_error<DWPError>(
|
||||
"compile unit exceeds .debug_info section range: " +
|
||||
utostr(Offset + Header.Length) + " >= " + utostr(InfoData.size()));
|
||||
}
|
||||
|
||||
Header.Version = InfoData.getU16(&Offset, &Err);
|
||||
if (Err)
|
||||
return make_error<DWPError>("cannot parse compile unit version: " +
|
||||
llvm::toString(std::move(Err)));
|
||||
|
||||
uint64_t MinHeaderLength;
|
||||
if (Header.Version >= 5) {
|
||||
// Size: Version (2), UnitType (1), AddrSize (1), DebugAbbrevOffset (4),
|
||||
// Signature (8)
|
||||
MinHeaderLength = 16;
|
||||
} else {
|
||||
// Size: Version (2), DebugAbbrevOffset (4), AddrSize (1)
|
||||
MinHeaderLength = 7;
|
||||
}
|
||||
if (Header.Length < MinHeaderLength) {
|
||||
return make_error<DWPError>("unit length is too small: expected at least " +
|
||||
utostr(MinHeaderLength) + " got " +
|
||||
utostr(Header.Length) + ".");
|
||||
}
|
||||
if (Header.Version >= 5) {
|
||||
Header.UnitType = InfoData.getU8(&Offset);
|
||||
Header.AddrSize = InfoData.getU8(&Offset);
|
||||
Header.DebugAbbrevOffset = InfoData.getU32(&Offset);
|
||||
Header.Signature = InfoData.getU64(&Offset);
|
||||
if (Header.UnitType == dwarf::DW_UT_split_type) {
|
||||
// Type offset.
|
||||
MinHeaderLength += 4;
|
||||
if (Header.Length < MinHeaderLength)
|
||||
return make_error<DWPError>("type unit is missing type offset");
|
||||
InfoData.getU32(&Offset);
|
||||
}
|
||||
} else {
|
||||
// Note that, address_size and debug_abbrev_offset fields have switched
|
||||
// places between dwarf version 4 and 5.
|
||||
Header.DebugAbbrevOffset = InfoData.getU32(&Offset);
|
||||
Header.AddrSize = InfoData.getU8(&Offset);
|
||||
}
|
||||
|
||||
Header.HeaderSize = Offset;
|
||||
return Header;
|
||||
}
|
||||
|
||||
static void writeStringsAndOffsets(MCStreamer &Out, DWPStringPool &Strings,
|
||||
MCSection *StrOffsetSection,
|
||||
StringRef CurStrSection,
|
||||
StringRef CurStrOffsetSection,
|
||||
uint16_t Version) {
|
||||
// Could possibly produce an error or warning if one of these was non-null but
|
||||
// the other was null.
|
||||
if (CurStrSection.empty() || CurStrOffsetSection.empty())
|
||||
return;
|
||||
|
||||
DenseMap<uint64_t, uint32_t> OffsetRemapping;
|
||||
|
||||
DataExtractor Data(CurStrSection, true, 0);
|
||||
uint64_t LocalOffset = 0;
|
||||
uint64_t PrevOffset = 0;
|
||||
while (const char *s = Data.getCStr(&LocalOffset)) {
|
||||
OffsetRemapping[PrevOffset] =
|
||||
Strings.getOffset(s, LocalOffset - PrevOffset);
|
||||
PrevOffset = LocalOffset;
|
||||
}
|
||||
|
||||
Data = DataExtractor(CurStrOffsetSection, true, 0);
|
||||
|
||||
Out.SwitchSection(StrOffsetSection);
|
||||
|
||||
uint64_t HeaderSize = debugStrOffsetsHeaderSize(Data, Version);
|
||||
uint64_t Offset = 0;
|
||||
uint64_t Size = CurStrOffsetSection.size();
|
||||
// FIXME: This can be caused by bad input and should be handled as such.
|
||||
assert(HeaderSize <= Size && "StrOffsetSection size is less than its header");
|
||||
// Copy the header to the output.
|
||||
Out.emitBytes(Data.getBytes(&Offset, HeaderSize));
|
||||
while (Offset < Size) {
|
||||
auto OldOffset = Data.getU32(&Offset);
|
||||
auto NewOffset = OffsetRemapping[OldOffset];
|
||||
Out.emitIntValue(NewOffset, 4);
|
||||
}
|
||||
}
|
||||
|
||||
static uint64_t getCUAbbrev(StringRef Abbrev, uint64_t AbbrCode) {
|
||||
uint64_t Offset = 0;
|
||||
DataExtractor AbbrevData(Abbrev, true, 0);
|
||||
while (AbbrevData.getULEB128(&Offset) != AbbrCode) {
|
||||
// Tag
|
||||
AbbrevData.getULEB128(&Offset);
|
||||
// DW_CHILDREN
|
||||
AbbrevData.getU8(&Offset);
|
||||
// Attributes
|
||||
while (AbbrevData.getULEB128(&Offset) | AbbrevData.getULEB128(&Offset))
|
||||
;
|
||||
}
|
||||
return Offset;
|
||||
}
|
||||
|
||||
struct CompileUnitIdentifiers {
|
||||
uint64_t Signature = 0;
|
||||
const char *Name = "";
|
||||
const char *DWOName = "";
|
||||
};
|
||||
|
||||
static Expected<const char *>
|
||||
getIndexedString(dwarf::Form Form, DataExtractor InfoData, uint64_t &InfoOffset,
|
||||
StringRef StrOffsets, StringRef Str, uint16_t Version) {
|
||||
if (Form == dwarf::DW_FORM_string)
|
||||
return InfoData.getCStr(&InfoOffset);
|
||||
uint64_t StrIndex;
|
||||
switch (Form) {
|
||||
case dwarf::DW_FORM_strx1:
|
||||
StrIndex = InfoData.getU8(&InfoOffset);
|
||||
break;
|
||||
case dwarf::DW_FORM_strx2:
|
||||
StrIndex = InfoData.getU16(&InfoOffset);
|
||||
break;
|
||||
case dwarf::DW_FORM_strx3:
|
||||
StrIndex = InfoData.getU24(&InfoOffset);
|
||||
break;
|
||||
case dwarf::DW_FORM_strx4:
|
||||
StrIndex = InfoData.getU32(&InfoOffset);
|
||||
break;
|
||||
case dwarf::DW_FORM_strx:
|
||||
case dwarf::DW_FORM_GNU_str_index:
|
||||
StrIndex = InfoData.getULEB128(&InfoOffset);
|
||||
break;
|
||||
default:
|
||||
return make_error<DWPError>(
|
||||
"string field must be encoded with one of the following: "
|
||||
"DW_FORM_string, DW_FORM_strx, DW_FORM_strx1, DW_FORM_strx2, "
|
||||
"DW_FORM_strx3, DW_FORM_strx4, or DW_FORM_GNU_str_index.");
|
||||
}
|
||||
DataExtractor StrOffsetsData(StrOffsets, true, 0);
|
||||
uint64_t StrOffsetsOffset = 4 * StrIndex;
|
||||
StrOffsetsOffset += debugStrOffsetsHeaderSize(StrOffsetsData, Version);
|
||||
|
||||
uint64_t StrOffset = StrOffsetsData.getU32(&StrOffsetsOffset);
|
||||
DataExtractor StrData(Str, true, 0);
|
||||
return StrData.getCStr(&StrOffset);
|
||||
}
|
||||
|
||||
static Expected<CompileUnitIdentifiers>
|
||||
getCUIdentifiers(InfoSectionUnitHeader &Header, StringRef Abbrev,
|
||||
StringRef Info, StringRef StrOffsets, StringRef Str) {
|
||||
DataExtractor InfoData(Info, true, 0);
|
||||
uint64_t Offset = Header.HeaderSize;
|
||||
if (Header.Version >= 5 && Header.UnitType != dwarf::DW_UT_split_compile)
|
||||
return make_error<DWPError>(
|
||||
std::string("unit type DW_UT_split_compile type not found in "
|
||||
"debug_info header. Unexpected unit type 0x" +
|
||||
utostr(Header.UnitType) + " found"));
|
||||
|
||||
CompileUnitIdentifiers ID;
|
||||
|
||||
uint32_t AbbrCode = InfoData.getULEB128(&Offset);
|
||||
DataExtractor AbbrevData(Abbrev, true, 0);
|
||||
uint64_t AbbrevOffset = getCUAbbrev(Abbrev, AbbrCode);
|
||||
auto Tag = static_cast<dwarf::Tag>(AbbrevData.getULEB128(&AbbrevOffset));
|
||||
if (Tag != dwarf::DW_TAG_compile_unit)
|
||||
return make_error<DWPError>("top level DIE is not a compile unit");
|
||||
// DW_CHILDREN
|
||||
AbbrevData.getU8(&AbbrevOffset);
|
||||
uint32_t Name;
|
||||
dwarf::Form Form;
|
||||
while ((Name = AbbrevData.getULEB128(&AbbrevOffset)) |
|
||||
(Form = static_cast<dwarf::Form>(AbbrevData.getULEB128(&AbbrevOffset))) &&
|
||||
(Name != 0 || Form != 0)) {
|
||||
switch (Name) {
|
||||
case dwarf::DW_AT_name: {
|
||||
Expected<const char *> EName = getIndexedString(
|
||||
Form, InfoData, Offset, StrOffsets, Str, Header.Version);
|
||||
if (!EName)
|
||||
return EName.takeError();
|
||||
ID.Name = *EName;
|
||||
break;
|
||||
}
|
||||
case dwarf::DW_AT_GNU_dwo_name:
|
||||
case dwarf::DW_AT_dwo_name: {
|
||||
Expected<const char *> EName = getIndexedString(
|
||||
Form, InfoData, Offset, StrOffsets, Str, Header.Version);
|
||||
if (!EName)
|
||||
return EName.takeError();
|
||||
ID.DWOName = *EName;
|
||||
break;
|
||||
}
|
||||
case dwarf::DW_AT_GNU_dwo_id:
|
||||
Header.Signature = InfoData.getU64(&Offset);
|
||||
break;
|
||||
default:
|
||||
DWARFFormValue::skipValue(
|
||||
Form, InfoData, &Offset,
|
||||
dwarf::FormParams({Header.Version, Header.AddrSize, Header.Format}));
|
||||
}
|
||||
}
|
||||
if (!Header.Signature)
|
||||
return make_error<DWPError>("compile unit missing dwo_id");
|
||||
ID.Signature = *Header.Signature;
|
||||
return ID;
|
||||
}
|
||||
|
||||
struct UnitIndexEntry {
|
||||
DWARFUnitIndex::Entry::SectionContribution Contributions[8];
|
||||
std::string Name;
|
||||
std::string DWOName;
|
||||
StringRef DWPName;
|
||||
};
|
||||
|
||||
static bool isSupportedSectionKind(DWARFSectionKind Kind) {
|
||||
return Kind != DW_SECT_EXT_unknown;
|
||||
}
|
||||
|
||||
// Convert an internal section identifier into the index to use with
|
||||
// UnitIndexEntry::Contributions.
|
||||
static unsigned getContributionIndex(DWARFSectionKind Kind,
|
||||
uint32_t IndexVersion) {
|
||||
assert(serializeSectionKind(Kind, IndexVersion) >= DW_SECT_INFO);
|
||||
return serializeSectionKind(Kind, IndexVersion) - DW_SECT_INFO;
|
||||
}
|
||||
|
||||
// Convert a UnitIndexEntry::Contributions index to the corresponding on-disk
|
||||
// value of the section identifier.
|
||||
static unsigned getOnDiskSectionId(unsigned Index) {
|
||||
return Index + DW_SECT_INFO;
|
||||
}
|
||||
|
||||
static StringRef getSubsection(StringRef Section,
|
||||
const DWARFUnitIndex::Entry &Entry,
|
||||
DWARFSectionKind Kind) {
|
||||
const auto *Off = Entry.getContribution(Kind);
|
||||
if (!Off)
|
||||
return StringRef();
|
||||
return Section.substr(Off->Offset, Off->Length);
|
||||
}
|
||||
|
||||
static void
|
||||
addAllTypesFromDWP(MCStreamer &Out,
|
||||
MapVector<uint64_t, UnitIndexEntry> &TypeIndexEntries,
|
||||
const DWARFUnitIndex &TUIndex, MCSection *OutputTypes,
|
||||
StringRef Types, const UnitIndexEntry &TUEntry,
|
||||
uint32_t &TypesOffset, unsigned TypesContributionIndex) {
|
||||
Out.SwitchSection(OutputTypes);
|
||||
for (const DWARFUnitIndex::Entry &E : TUIndex.getRows()) {
|
||||
auto *I = E.getContributions();
|
||||
if (!I)
|
||||
continue;
|
||||
auto P = TypeIndexEntries.insert(std::make_pair(E.getSignature(), TUEntry));
|
||||
if (!P.second)
|
||||
continue;
|
||||
auto &Entry = P.first->second;
|
||||
// Zero out the debug_info contribution
|
||||
Entry.Contributions[0] = {};
|
||||
for (auto Kind : TUIndex.getColumnKinds()) {
|
||||
if (!isSupportedSectionKind(Kind))
|
||||
continue;
|
||||
auto &C =
|
||||
Entry.Contributions[getContributionIndex(Kind, TUIndex.getVersion())];
|
||||
C.Offset += I->Offset;
|
||||
C.Length = I->Length;
|
||||
++I;
|
||||
}
|
||||
auto &C = Entry.Contributions[TypesContributionIndex];
|
||||
Out.emitBytes(Types.substr(
|
||||
C.Offset - TUEntry.Contributions[TypesContributionIndex].Offset,
|
||||
C.Length));
|
||||
C.Offset = TypesOffset;
|
||||
TypesOffset += C.Length;
|
||||
}
|
||||
}
|
||||
|
||||
static void addAllTypesFromTypesSection(
|
||||
MCStreamer &Out, MapVector<uint64_t, UnitIndexEntry> &TypeIndexEntries,
|
||||
MCSection *OutputTypes, const std::vector<StringRef> &TypesSections,
|
||||
const UnitIndexEntry &CUEntry, uint32_t &TypesOffset) {
|
||||
for (StringRef Types : TypesSections) {
|
||||
Out.SwitchSection(OutputTypes);
|
||||
uint64_t Offset = 0;
|
||||
DataExtractor Data(Types, true, 0);
|
||||
while (Data.isValidOffset(Offset)) {
|
||||
UnitIndexEntry Entry = CUEntry;
|
||||
// Zero out the debug_info contribution
|
||||
Entry.Contributions[0] = {};
|
||||
auto &C = Entry.Contributions[getContributionIndex(DW_SECT_EXT_TYPES, 2)];
|
||||
C.Offset = TypesOffset;
|
||||
auto PrevOffset = Offset;
|
||||
// Length of the unit, including the 4 byte length field.
|
||||
C.Length = Data.getU32(&Offset) + 4;
|
||||
|
||||
Data.getU16(&Offset); // Version
|
||||
Data.getU32(&Offset); // Abbrev offset
|
||||
Data.getU8(&Offset); // Address size
|
||||
auto Signature = Data.getU64(&Offset);
|
||||
Offset = PrevOffset + C.Length;
|
||||
|
||||
auto P = TypeIndexEntries.insert(std::make_pair(Signature, Entry));
|
||||
if (!P.second)
|
||||
continue;
|
||||
|
||||
Out.emitBytes(Types.substr(PrevOffset, C.Length));
|
||||
TypesOffset += C.Length;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
writeIndexTable(MCStreamer &Out, ArrayRef<unsigned> ContributionOffsets,
|
||||
const MapVector<uint64_t, UnitIndexEntry> &IndexEntries,
|
||||
uint32_t DWARFUnitIndex::Entry::SectionContribution::*Field) {
|
||||
for (const auto &E : IndexEntries)
|
||||
for (size_t i = 0; i != array_lengthof(E.second.Contributions); ++i)
|
||||
if (ContributionOffsets[i])
|
||||
Out.emitIntValue(E.second.Contributions[i].*Field, 4);
|
||||
}
|
||||
|
||||
static void writeIndex(MCStreamer &Out, MCSection *Section,
|
||||
ArrayRef<unsigned> ContributionOffsets,
|
||||
const MapVector<uint64_t, UnitIndexEntry> &IndexEntries,
|
||||
uint32_t IndexVersion) {
|
||||
if (IndexEntries.empty())
|
||||
return;
|
||||
|
||||
unsigned Columns = 0;
|
||||
for (auto &C : ContributionOffsets)
|
||||
if (C)
|
||||
++Columns;
|
||||
|
||||
std::vector<unsigned> Buckets(NextPowerOf2(3 * IndexEntries.size() / 2));
|
||||
uint64_t Mask = Buckets.size() - 1;
|
||||
size_t i = 0;
|
||||
for (const auto &P : IndexEntries) {
|
||||
auto S = P.first;
|
||||
auto H = S & Mask;
|
||||
auto HP = ((S >> 32) & Mask) | 1;
|
||||
while (Buckets[H]) {
|
||||
assert(S != IndexEntries.begin()[Buckets[H] - 1].first &&
|
||||
"Duplicate unit");
|
||||
H = (H + HP) & Mask;
|
||||
}
|
||||
Buckets[H] = i + 1;
|
||||
++i;
|
||||
}
|
||||
|
||||
Out.SwitchSection(Section);
|
||||
Out.emitIntValue(IndexVersion, 4); // Version
|
||||
Out.emitIntValue(Columns, 4); // Columns
|
||||
Out.emitIntValue(IndexEntries.size(), 4); // Num Units
|
||||
Out.emitIntValue(Buckets.size(), 4); // Num Buckets
|
||||
|
||||
// Write the signatures.
|
||||
for (const auto &I : Buckets)
|
||||
Out.emitIntValue(I ? IndexEntries.begin()[I - 1].first : 0, 8);
|
||||
|
||||
// Write the indexes.
|
||||
for (const auto &I : Buckets)
|
||||
Out.emitIntValue(I, 4);
|
||||
|
||||
// Write the column headers (which sections will appear in the table)
|
||||
for (size_t i = 0; i != ContributionOffsets.size(); ++i)
|
||||
if (ContributionOffsets[i])
|
||||
Out.emitIntValue(getOnDiskSectionId(i), 4);
|
||||
|
||||
// Write the offsets.
|
||||
writeIndexTable(Out, ContributionOffsets, IndexEntries,
|
||||
&DWARFUnitIndex::Entry::SectionContribution::Offset);
|
||||
|
||||
// Write the lengths.
|
||||
writeIndexTable(Out, ContributionOffsets, IndexEntries,
|
||||
&DWARFUnitIndex::Entry::SectionContribution::Length);
|
||||
}
|
||||
|
||||
static std::string buildDWODescription(StringRef Name, StringRef DWPName,
|
||||
StringRef DWOName) {
|
||||
std::string Text = "\'";
|
||||
Text += Name;
|
||||
Text += '\'';
|
||||
if (!DWPName.empty()) {
|
||||
Text += " (from ";
|
||||
if (!DWOName.empty()) {
|
||||
Text += '\'';
|
||||
Text += DWOName;
|
||||
Text += "' in ";
|
||||
}
|
||||
Text += '\'';
|
||||
Text += DWPName;
|
||||
Text += "')";
|
||||
}
|
||||
return Text;
|
||||
}
|
||||
|
||||
static Error createError(StringRef Name, Error E) {
|
||||
return make_error<DWPError>(
|
||||
("failure while decompressing compressed section: '" + Name + "', " +
|
||||
llvm::toString(std::move(E)))
|
||||
.str());
|
||||
}
|
||||
|
||||
static Error
|
||||
handleCompressedSection(std::deque<SmallString<32>> &UncompressedSections,
|
||||
StringRef &Name, StringRef &Contents) {
|
||||
if (!Decompressor::isGnuStyle(Name))
|
||||
return Error::success();
|
||||
|
||||
Expected<Decompressor> Dec =
|
||||
Decompressor::create(Name, Contents, false /*IsLE*/, false /*Is64Bit*/);
|
||||
if (!Dec)
|
||||
return createError(Name, Dec.takeError());
|
||||
|
||||
UncompressedSections.emplace_back();
|
||||
if (Error E = Dec->resizeAndDecompress(UncompressedSections.back()))
|
||||
return createError(Name, std::move(E));
|
||||
|
||||
Name = Name.substr(2); // Drop ".z"
|
||||
Contents = UncompressedSections.back();
|
||||
return Error::success();
|
||||
}
|
||||
|
||||
static Error handleSection(
|
||||
const StringMap<std::pair<MCSection *, DWARFSectionKind>> &KnownSections,
|
||||
const MCSection *StrSection, const MCSection *StrOffsetSection,
|
||||
const MCSection *TypesSection, const MCSection *CUIndexSection,
|
||||
const MCSection *TUIndexSection, const MCSection *InfoSection,
|
||||
const SectionRef &Section, MCStreamer &Out,
|
||||
std::deque<SmallString<32>> &UncompressedSections,
|
||||
uint32_t (&ContributionOffsets)[8], UnitIndexEntry &CurEntry,
|
||||
StringRef &CurStrSection, StringRef &CurStrOffsetSection,
|
||||
std::vector<StringRef> &CurTypesSection,
|
||||
std::vector<StringRef> &CurInfoSection, StringRef &AbbrevSection,
|
||||
StringRef &CurCUIndexSection, StringRef &CurTUIndexSection,
|
||||
std::vector<std::pair<DWARFSectionKind, uint32_t>> &SectionLength) {
|
||||
if (Section.isBSS())
|
||||
return Error::success();
|
||||
|
||||
if (Section.isVirtual())
|
||||
return Error::success();
|
||||
|
||||
Expected<StringRef> NameOrErr = Section.getName();
|
||||
if (!NameOrErr)
|
||||
return NameOrErr.takeError();
|
||||
StringRef Name = *NameOrErr;
|
||||
|
||||
Expected<StringRef> ContentsOrErr = Section.getContents();
|
||||
if (!ContentsOrErr)
|
||||
return ContentsOrErr.takeError();
|
||||
StringRef Contents = *ContentsOrErr;
|
||||
|
||||
if (auto Err = handleCompressedSection(UncompressedSections, Name, Contents))
|
||||
return Err;
|
||||
|
||||
Name = Name.substr(Name.find_first_not_of("._"));
|
||||
|
||||
auto SectionPair = KnownSections.find(Name);
|
||||
if (SectionPair == KnownSections.end())
|
||||
return Error::success();
|
||||
|
||||
if (DWARFSectionKind Kind = SectionPair->second.second) {
|
||||
if (Kind != DW_SECT_EXT_TYPES && Kind != DW_SECT_INFO) {
|
||||
SectionLength.push_back(std::make_pair(Kind, Contents.size()));
|
||||
}
|
||||
|
||||
if (Kind == DW_SECT_ABBREV) {
|
||||
AbbrevSection = Contents;
|
||||
}
|
||||
}
|
||||
|
||||
MCSection *OutSection = SectionPair->second.first;
|
||||
if (OutSection == StrOffsetSection)
|
||||
CurStrOffsetSection = Contents;
|
||||
else if (OutSection == StrSection)
|
||||
CurStrSection = Contents;
|
||||
else if (OutSection == TypesSection)
|
||||
CurTypesSection.push_back(Contents);
|
||||
else if (OutSection == CUIndexSection)
|
||||
CurCUIndexSection = Contents;
|
||||
else if (OutSection == TUIndexSection)
|
||||
CurTUIndexSection = Contents;
|
||||
else if (OutSection == InfoSection)
|
||||
CurInfoSection.push_back(Contents);
|
||||
else {
|
||||
Out.SwitchSection(OutSection);
|
||||
Out.emitBytes(Contents);
|
||||
}
|
||||
return Error::success();
|
||||
}
|
||||
|
||||
static Error
|
||||
buildDuplicateError(const std::pair<uint64_t, UnitIndexEntry> &PrevE,
|
||||
const CompileUnitIdentifiers &ID, StringRef DWPName) {
|
||||
return make_error<DWPError>(
|
||||
std::string("duplicate DWO ID (") + utohexstr(PrevE.first) + ") in " +
|
||||
buildDWODescription(PrevE.second.Name, PrevE.second.DWPName,
|
||||
PrevE.second.DWOName) +
|
||||
" and " + buildDWODescription(ID.Name, DWPName, ID.DWOName));
|
||||
}
|
||||
|
||||
static Expected<SmallVector<std::string, 16>>
|
||||
getDWOFilenames(StringRef ExecFilename) {
|
||||
auto ErrOrObj = object::ObjectFile::createObjectFile(ExecFilename);
|
||||
@@ -649,282 +76,6 @@ getDWOFilenames(StringRef ExecFilename) {
|
||||
return std::move(DWOPaths);
|
||||
}
|
||||
|
||||
static Error write(MCStreamer &Out, ArrayRef<std::string> Inputs) {
|
||||
const auto &MCOFI = *Out.getContext().getObjectFileInfo();
|
||||
MCSection *const StrSection = MCOFI.getDwarfStrDWOSection();
|
||||
MCSection *const StrOffsetSection = MCOFI.getDwarfStrOffDWOSection();
|
||||
MCSection *const TypesSection = MCOFI.getDwarfTypesDWOSection();
|
||||
MCSection *const CUIndexSection = MCOFI.getDwarfCUIndexSection();
|
||||
MCSection *const TUIndexSection = MCOFI.getDwarfTUIndexSection();
|
||||
MCSection *const InfoSection = MCOFI.getDwarfInfoDWOSection();
|
||||
const StringMap<std::pair<MCSection *, DWARFSectionKind>> KnownSections = {
|
||||
{"debug_info.dwo", {InfoSection, DW_SECT_INFO}},
|
||||
{"debug_types.dwo", {MCOFI.getDwarfTypesDWOSection(), DW_SECT_EXT_TYPES}},
|
||||
{"debug_str_offsets.dwo", {StrOffsetSection, DW_SECT_STR_OFFSETS}},
|
||||
{"debug_str.dwo", {StrSection, static_cast<DWARFSectionKind>(0)}},
|
||||
{"debug_loc.dwo", {MCOFI.getDwarfLocDWOSection(), DW_SECT_EXT_LOC}},
|
||||
{"debug_line.dwo", {MCOFI.getDwarfLineDWOSection(), DW_SECT_LINE}},
|
||||
{"debug_macro.dwo", {MCOFI.getDwarfMacroDWOSection(), DW_SECT_MACRO}},
|
||||
{"debug_abbrev.dwo", {MCOFI.getDwarfAbbrevDWOSection(), DW_SECT_ABBREV}},
|
||||
{"debug_loclists.dwo",
|
||||
{MCOFI.getDwarfLoclistsDWOSection(), DW_SECT_LOCLISTS}},
|
||||
{"debug_rnglists.dwo",
|
||||
{MCOFI.getDwarfRnglistsDWOSection(), DW_SECT_RNGLISTS}},
|
||||
{"debug_cu_index", {CUIndexSection, static_cast<DWARFSectionKind>(0)}},
|
||||
{"debug_tu_index", {TUIndexSection, static_cast<DWARFSectionKind>(0)}}};
|
||||
|
||||
MapVector<uint64_t, UnitIndexEntry> IndexEntries;
|
||||
MapVector<uint64_t, UnitIndexEntry> TypeIndexEntries;
|
||||
|
||||
uint32_t ContributionOffsets[8] = {};
|
||||
uint16_t Version = 0;
|
||||
uint32_t IndexVersion = 0;
|
||||
|
||||
DWPStringPool Strings(Out, StrSection);
|
||||
|
||||
SmallVector<OwningBinary<object::ObjectFile>, 128> Objects;
|
||||
Objects.reserve(Inputs.size());
|
||||
|
||||
std::deque<SmallString<32>> UncompressedSections;
|
||||
|
||||
for (const auto &Input : Inputs) {
|
||||
auto ErrOrObj = object::ObjectFile::createObjectFile(Input);
|
||||
if (!ErrOrObj)
|
||||
return ErrOrObj.takeError();
|
||||
|
||||
auto &Obj = *ErrOrObj->getBinary();
|
||||
Objects.push_back(std::move(*ErrOrObj));
|
||||
|
||||
UnitIndexEntry CurEntry = {};
|
||||
|
||||
StringRef CurStrSection;
|
||||
StringRef CurStrOffsetSection;
|
||||
std::vector<StringRef> CurTypesSection;
|
||||
std::vector<StringRef> CurInfoSection;
|
||||
StringRef AbbrevSection;
|
||||
StringRef CurCUIndexSection;
|
||||
StringRef CurTUIndexSection;
|
||||
|
||||
// This maps each section contained in this file to its length.
|
||||
// This information is later on used to calculate the contributions,
|
||||
// i.e. offset and length, of each compile/type unit to a section.
|
||||
std::vector<std::pair<DWARFSectionKind, uint32_t>> SectionLength;
|
||||
|
||||
for (const auto &Section : Obj.sections())
|
||||
if (auto Err = handleSection(
|
||||
KnownSections, StrSection, StrOffsetSection, TypesSection,
|
||||
CUIndexSection, TUIndexSection, InfoSection, Section, Out,
|
||||
UncompressedSections, ContributionOffsets, CurEntry,
|
||||
CurStrSection, CurStrOffsetSection, CurTypesSection,
|
||||
CurInfoSection, AbbrevSection, CurCUIndexSection,
|
||||
CurTUIndexSection, SectionLength))
|
||||
return Err;
|
||||
|
||||
if (CurInfoSection.empty())
|
||||
continue;
|
||||
|
||||
Expected<InfoSectionUnitHeader> HeaderOrErr =
|
||||
parseInfoSectionUnitHeader(CurInfoSection.front());
|
||||
if (!HeaderOrErr)
|
||||
return HeaderOrErr.takeError();
|
||||
InfoSectionUnitHeader &Header = *HeaderOrErr;
|
||||
|
||||
if (Version == 0) {
|
||||
Version = Header.Version;
|
||||
IndexVersion = Version < 5 ? 2 : 5;
|
||||
} else if (Version != Header.Version) {
|
||||
return make_error<DWPError>("incompatible DWARF compile unit versions.");
|
||||
}
|
||||
|
||||
writeStringsAndOffsets(Out, Strings, StrOffsetSection, CurStrSection,
|
||||
CurStrOffsetSection, Header.Version);
|
||||
|
||||
for (auto Pair : SectionLength) {
|
||||
auto Index = getContributionIndex(Pair.first, IndexVersion);
|
||||
CurEntry.Contributions[Index].Offset = ContributionOffsets[Index];
|
||||
ContributionOffsets[Index] +=
|
||||
(CurEntry.Contributions[Index].Length = Pair.second);
|
||||
}
|
||||
|
||||
uint32_t &InfoSectionOffset =
|
||||
ContributionOffsets[getContributionIndex(DW_SECT_INFO, IndexVersion)];
|
||||
if (CurCUIndexSection.empty()) {
|
||||
bool FoundCUUnit = false;
|
||||
Out.SwitchSection(InfoSection);
|
||||
for (StringRef Info : CurInfoSection) {
|
||||
uint64_t UnitOffset = 0;
|
||||
while (Info.size() > UnitOffset) {
|
||||
Expected<InfoSectionUnitHeader> HeaderOrError =
|
||||
parseInfoSectionUnitHeader(Info.substr(UnitOffset, Info.size()));
|
||||
if (!HeaderOrError)
|
||||
return HeaderOrError.takeError();
|
||||
InfoSectionUnitHeader &Header = *HeaderOrError;
|
||||
|
||||
UnitIndexEntry Entry = CurEntry;
|
||||
auto &C = Entry.Contributions[getContributionIndex(DW_SECT_INFO,
|
||||
IndexVersion)];
|
||||
C.Offset = InfoSectionOffset;
|
||||
C.Length = Header.Length + 4;
|
||||
UnitOffset += C.Length;
|
||||
if (Header.Version < 5 ||
|
||||
Header.UnitType == dwarf::DW_UT_split_compile) {
|
||||
Expected<CompileUnitIdentifiers> EID =
|
||||
getCUIdentifiers(Header, AbbrevSection,
|
||||
Info.substr(UnitOffset - C.Length, C.Length),
|
||||
CurStrOffsetSection, CurStrSection);
|
||||
|
||||
if (!EID)
|
||||
return createFileError(Input, EID.takeError());
|
||||
const auto &ID = *EID;
|
||||
auto P = IndexEntries.insert(std::make_pair(ID.Signature, Entry));
|
||||
if (!P.second)
|
||||
return buildDuplicateError(*P.first, ID, "");
|
||||
P.first->second.Name = ID.Name;
|
||||
P.first->second.DWOName = ID.DWOName;
|
||||
|
||||
FoundCUUnit = true;
|
||||
} else if (Header.UnitType == dwarf::DW_UT_split_type) {
|
||||
auto P = TypeIndexEntries.insert(
|
||||
std::make_pair(Header.Signature.getValue(), Entry));
|
||||
if (!P.second)
|
||||
continue;
|
||||
}
|
||||
Out.emitBytes(Info.substr(UnitOffset - C.Length, C.Length));
|
||||
InfoSectionOffset += C.Length;
|
||||
}
|
||||
}
|
||||
|
||||
if (!FoundCUUnit)
|
||||
return make_error<DWPError>("no compile unit found in file: " + Input);
|
||||
|
||||
if (IndexVersion == 2) {
|
||||
// Add types from the .debug_types section from DWARF < 5.
|
||||
addAllTypesFromTypesSection(
|
||||
Out, TypeIndexEntries, TypesSection, CurTypesSection, CurEntry,
|
||||
ContributionOffsets[getContributionIndex(DW_SECT_EXT_TYPES, 2)]);
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
if (CurInfoSection.size() != 1)
|
||||
return make_error<DWPError>("expected exactly one occurrence of a debug "
|
||||
"info section in a .dwp file");
|
||||
StringRef DwpSingleInfoSection = CurInfoSection.front();
|
||||
|
||||
DWARFUnitIndex CUIndex(DW_SECT_INFO);
|
||||
DataExtractor CUIndexData(CurCUIndexSection, Obj.isLittleEndian(), 0);
|
||||
if (!CUIndex.parse(CUIndexData))
|
||||
return make_error<DWPError>("failed to parse cu_index");
|
||||
if (CUIndex.getVersion() != IndexVersion)
|
||||
return make_error<DWPError>("incompatible cu_index versions, found " +
|
||||
utostr(CUIndex.getVersion()) +
|
||||
" and expecting " + utostr(IndexVersion));
|
||||
|
||||
Out.SwitchSection(InfoSection);
|
||||
for (const DWARFUnitIndex::Entry &E : CUIndex.getRows()) {
|
||||
auto *I = E.getContributions();
|
||||
if (!I)
|
||||
continue;
|
||||
auto P = IndexEntries.insert(std::make_pair(E.getSignature(), CurEntry));
|
||||
StringRef CUInfoSection =
|
||||
getSubsection(DwpSingleInfoSection, E, DW_SECT_INFO);
|
||||
Expected<InfoSectionUnitHeader> HeaderOrError =
|
||||
parseInfoSectionUnitHeader(CUInfoSection);
|
||||
if (!HeaderOrError)
|
||||
return HeaderOrError.takeError();
|
||||
InfoSectionUnitHeader &Header = *HeaderOrError;
|
||||
|
||||
Expected<CompileUnitIdentifiers> EID = getCUIdentifiers(
|
||||
Header, getSubsection(AbbrevSection, E, DW_SECT_ABBREV),
|
||||
CUInfoSection,
|
||||
getSubsection(CurStrOffsetSection, E, DW_SECT_STR_OFFSETS),
|
||||
CurStrSection);
|
||||
if (!EID)
|
||||
return createFileError(Input, EID.takeError());
|
||||
const auto &ID = *EID;
|
||||
if (!P.second)
|
||||
return buildDuplicateError(*P.first, ID, Input);
|
||||
auto &NewEntry = P.first->second;
|
||||
NewEntry.Name = ID.Name;
|
||||
NewEntry.DWOName = ID.DWOName;
|
||||
NewEntry.DWPName = Input;
|
||||
for (auto Kind : CUIndex.getColumnKinds()) {
|
||||
if (!isSupportedSectionKind(Kind))
|
||||
continue;
|
||||
auto &C =
|
||||
NewEntry.Contributions[getContributionIndex(Kind, IndexVersion)];
|
||||
C.Offset += I->Offset;
|
||||
C.Length = I->Length;
|
||||
++I;
|
||||
}
|
||||
unsigned Index = getContributionIndex(DW_SECT_INFO, IndexVersion);
|
||||
auto &C = NewEntry.Contributions[Index];
|
||||
Out.emitBytes(CUInfoSection);
|
||||
C.Offset = InfoSectionOffset;
|
||||
InfoSectionOffset += C.Length;
|
||||
}
|
||||
|
||||
if (!CurTUIndexSection.empty()) {
|
||||
llvm::DWARFSectionKind TUSectionKind;
|
||||
MCSection *OutSection;
|
||||
StringRef TypeInputSection;
|
||||
// Write type units into debug info section for DWARFv5.
|
||||
if (Version >= 5) {
|
||||
TUSectionKind = DW_SECT_INFO;
|
||||
OutSection = InfoSection;
|
||||
TypeInputSection = DwpSingleInfoSection;
|
||||
} else {
|
||||
// Write type units into debug types section for DWARF < 5.
|
||||
if (CurTypesSection.size() != 1)
|
||||
return make_error<DWPError>(
|
||||
"multiple type unit sections in .dwp file");
|
||||
|
||||
TUSectionKind = DW_SECT_EXT_TYPES;
|
||||
OutSection = TypesSection;
|
||||
TypeInputSection = CurTypesSection.front();
|
||||
}
|
||||
|
||||
DWARFUnitIndex TUIndex(TUSectionKind);
|
||||
DataExtractor TUIndexData(CurTUIndexSection, Obj.isLittleEndian(), 0);
|
||||
if (!TUIndex.parse(TUIndexData))
|
||||
return make_error<DWPError>("failed to parse tu_index");
|
||||
if (TUIndex.getVersion() != IndexVersion)
|
||||
return make_error<DWPError>("incompatible tu_index versions, found " +
|
||||
utostr(TUIndex.getVersion()) +
|
||||
" and expecting " + utostr(IndexVersion));
|
||||
|
||||
unsigned TypesContributionIndex =
|
||||
getContributionIndex(TUSectionKind, IndexVersion);
|
||||
addAllTypesFromDWP(Out, TypeIndexEntries, TUIndex, OutSection,
|
||||
TypeInputSection, CurEntry,
|
||||
ContributionOffsets[TypesContributionIndex],
|
||||
TypesContributionIndex);
|
||||
}
|
||||
}
|
||||
|
||||
if (Version < 5) {
|
||||
// Lie about there being no info contributions so the TU index only includes
|
||||
// the type unit contribution for DWARF < 5. In DWARFv5 the TU index has a
|
||||
// contribution to the info section, so we do not want to lie about it.
|
||||
ContributionOffsets[0] = 0;
|
||||
}
|
||||
writeIndex(Out, MCOFI.getDwarfTUIndexSection(), ContributionOffsets,
|
||||
TypeIndexEntries, IndexVersion);
|
||||
|
||||
if (Version < 5) {
|
||||
// Lie about the type contribution for DWARF < 5. In DWARFv5 the type
|
||||
// section does not exist, so no need to do anything about this.
|
||||
ContributionOffsets[getContributionIndex(DW_SECT_EXT_TYPES, 2)] = 0;
|
||||
// Unlie about the info contribution
|
||||
ContributionOffsets[0] = 1;
|
||||
}
|
||||
|
||||
writeIndex(Out, MCOFI.getDwarfCUIndexSection(), ContributionOffsets,
|
||||
IndexEntries, IndexVersion);
|
||||
|
||||
return Error::success();
|
||||
}
|
||||
|
||||
static int error(const Twine &Error, const Twine &Context) {
|
||||
errs() << Twine("while processing ") + Context + ":\n";
|
||||
errs() << Twine("error: ") + Error + "\n";
|
||||
|
||||
Reference in New Issue
Block a user