510 lines
14 KiB
C++
510 lines
14 KiB
C++
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//===- InputFile.cpp ------------------------------------------ *- 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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#include "InputFile.h"
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#include "FormatUtil.h"
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#include "LinePrinter.h"
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#include "llvm/BinaryFormat/Magic.h"
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#include "llvm/DebugInfo/CodeView/CodeView.h"
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#include "llvm/DebugInfo/CodeView/LazyRandomTypeCollection.h"
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#include "llvm/DebugInfo/CodeView/StringsAndChecksums.h"
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#include "llvm/DebugInfo/PDB/Native/DbiStream.h"
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#include "llvm/DebugInfo/PDB/Native/NativeSession.h"
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#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
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#include "llvm/DebugInfo/PDB/Native/PDBStringTable.h"
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#include "llvm/DebugInfo/PDB/Native/RawError.h"
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#include "llvm/DebugInfo/PDB/Native/TpiStream.h"
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#include "llvm/DebugInfo/PDB/PDB.h"
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#include "llvm/Object/COFF.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/FormatVariadic.h"
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using namespace llvm;
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using namespace llvm::codeview;
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using namespace llvm::object;
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using namespace llvm::pdb;
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InputFile::InputFile() {}
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InputFile::~InputFile() {}
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static Expected<ModuleDebugStreamRef>
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getModuleDebugStream(PDBFile &File, StringRef &ModuleName, uint32_t Index) {
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ExitOnError Err("Unexpected error: ");
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auto &Dbi = Err(File.getPDBDbiStream());
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const auto &Modules = Dbi.modules();
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if (Index >= Modules.getModuleCount())
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return make_error<RawError>(raw_error_code::index_out_of_bounds,
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"Invalid module index");
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auto Modi = Modules.getModuleDescriptor(Index);
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ModuleName = Modi.getModuleName();
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uint16_t ModiStream = Modi.getModuleStreamIndex();
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if (ModiStream == kInvalidStreamIndex)
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return make_error<RawError>(raw_error_code::no_stream,
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"Module stream not present");
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auto ModStreamData = File.createIndexedStream(ModiStream);
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ModuleDebugStreamRef ModS(Modi, std::move(ModStreamData));
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if (auto EC = ModS.reload())
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return make_error<RawError>(raw_error_code::corrupt_file,
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"Invalid module stream");
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return std::move(ModS);
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}
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static inline bool isCodeViewDebugSubsection(object::SectionRef Section,
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StringRef Name,
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BinaryStreamReader &Reader) {
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if (Expected<StringRef> NameOrErr = Section.getName()) {
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if (*NameOrErr != Name)
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return false;
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} else {
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consumeError(NameOrErr.takeError());
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return false;
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}
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Expected<StringRef> ContentsOrErr = Section.getContents();
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if (!ContentsOrErr) {
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consumeError(ContentsOrErr.takeError());
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return false;
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}
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Reader = BinaryStreamReader(*ContentsOrErr, support::little);
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uint32_t Magic;
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if (Reader.bytesRemaining() < sizeof(uint32_t))
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return false;
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cantFail(Reader.readInteger(Magic));
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if (Magic != COFF::DEBUG_SECTION_MAGIC)
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return false;
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return true;
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}
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static inline bool isDebugSSection(object::SectionRef Section,
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DebugSubsectionArray &Subsections) {
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BinaryStreamReader Reader;
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if (!isCodeViewDebugSubsection(Section, ".debug$S", Reader))
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return false;
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cantFail(Reader.readArray(Subsections, Reader.bytesRemaining()));
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return true;
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}
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static bool isDebugTSection(SectionRef Section, CVTypeArray &Types) {
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BinaryStreamReader Reader;
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if (!isCodeViewDebugSubsection(Section, ".debug$T", Reader) &&
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!isCodeViewDebugSubsection(Section, ".debug$P", Reader))
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return false;
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cantFail(Reader.readArray(Types, Reader.bytesRemaining()));
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return true;
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}
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static std::string formatChecksumKind(FileChecksumKind Kind) {
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switch (Kind) {
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RETURN_CASE(FileChecksumKind, None, "None");
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RETURN_CASE(FileChecksumKind, MD5, "MD5");
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RETURN_CASE(FileChecksumKind, SHA1, "SHA-1");
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RETURN_CASE(FileChecksumKind, SHA256, "SHA-256");
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}
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return formatUnknownEnum(Kind);
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}
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template <typename... Args>
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static void formatInternal(LinePrinter &Printer, bool Append, Args &&... args) {
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if (Append)
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Printer.format(std::forward<Args>(args)...);
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else
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Printer.formatLine(std::forward<Args>(args)...);
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}
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SymbolGroup::SymbolGroup(InputFile *File, uint32_t GroupIndex) : File(File) {
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if (!File)
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return;
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if (File->isPdb())
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initializeForPdb(GroupIndex);
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else {
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Name = ".debug$S";
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uint32_t I = 0;
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for (const auto &S : File->obj().sections()) {
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DebugSubsectionArray SS;
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if (!isDebugSSection(S, SS))
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continue;
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if (!SC.hasChecksums() || !SC.hasStrings())
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SC.initialize(SS);
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if (I == GroupIndex)
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Subsections = SS;
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if (SC.hasChecksums() && SC.hasStrings())
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break;
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}
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rebuildChecksumMap();
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}
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}
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StringRef SymbolGroup::name() const { return Name; }
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void SymbolGroup::updateDebugS(const codeview::DebugSubsectionArray &SS) {
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Subsections = SS;
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}
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void SymbolGroup::updatePdbModi(uint32_t Modi) { initializeForPdb(Modi); }
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void SymbolGroup::initializeForPdb(uint32_t Modi) {
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assert(File && File->isPdb());
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// PDB always uses the same string table, but each module has its own
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// checksums. So we only set the strings if they're not already set.
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if (!SC.hasStrings()) {
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auto StringTable = File->pdb().getStringTable();
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if (StringTable)
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SC.setStrings(StringTable->getStringTable());
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else
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consumeError(StringTable.takeError());
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}
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SC.resetChecksums();
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auto MDS = getModuleDebugStream(File->pdb(), Name, Modi);
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if (!MDS) {
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consumeError(MDS.takeError());
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return;
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}
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DebugStream = std::make_shared<ModuleDebugStreamRef>(std::move(*MDS));
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Subsections = DebugStream->getSubsectionsArray();
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SC.initialize(Subsections);
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rebuildChecksumMap();
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}
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void SymbolGroup::rebuildChecksumMap() {
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if (!SC.hasChecksums())
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return;
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for (const auto &Entry : SC.checksums()) {
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auto S = SC.strings().getString(Entry.FileNameOffset);
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if (!S)
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continue;
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ChecksumsByFile[*S] = Entry;
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}
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}
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const ModuleDebugStreamRef &SymbolGroup::getPdbModuleStream() const {
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assert(File && File->isPdb() && DebugStream);
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return *DebugStream;
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}
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Expected<StringRef> SymbolGroup::getNameFromStringTable(uint32_t Offset) const {
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return SC.strings().getString(Offset);
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}
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void SymbolGroup::formatFromFileName(LinePrinter &Printer, StringRef File,
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bool Append) const {
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auto FC = ChecksumsByFile.find(File);
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if (FC == ChecksumsByFile.end()) {
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formatInternal(Printer, Append, "- (no checksum) {0}", File);
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return;
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}
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formatInternal(Printer, Append, "- ({0}: {1}) {2}",
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formatChecksumKind(FC->getValue().Kind),
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toHex(FC->getValue().Checksum), File);
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}
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void SymbolGroup::formatFromChecksumsOffset(LinePrinter &Printer,
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uint32_t Offset,
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bool Append) const {
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if (!SC.hasChecksums()) {
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formatInternal(Printer, Append, "(unknown file name offset {0})", Offset);
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return;
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}
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auto Iter = SC.checksums().getArray().at(Offset);
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if (Iter == SC.checksums().getArray().end()) {
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formatInternal(Printer, Append, "(unknown file name offset {0})", Offset);
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return;
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}
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uint32_t FO = Iter->FileNameOffset;
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auto ExpectedFile = getNameFromStringTable(FO);
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if (!ExpectedFile) {
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formatInternal(Printer, Append, "(unknown file name offset {0})", Offset);
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consumeError(ExpectedFile.takeError());
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return;
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}
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if (Iter->Kind == FileChecksumKind::None) {
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formatInternal(Printer, Append, "{0} (no checksum)", *ExpectedFile);
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} else {
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formatInternal(Printer, Append, "{0} ({1}: {2})", *ExpectedFile,
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formatChecksumKind(Iter->Kind), toHex(Iter->Checksum));
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}
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}
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Expected<InputFile> InputFile::open(StringRef Path, bool AllowUnknownFile) {
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InputFile IF;
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if (!llvm::sys::fs::exists(Path))
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return make_error<StringError>(formatv("File {0} not found", Path),
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inconvertibleErrorCode());
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file_magic Magic;
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if (auto EC = identify_magic(Path, Magic))
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return make_error<StringError>(
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formatv("Unable to identify file type for file {0}", Path), EC);
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if (Magic == file_magic::coff_object) {
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Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(Path);
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if (!BinaryOrErr)
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return BinaryOrErr.takeError();
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IF.CoffObject = std::move(*BinaryOrErr);
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IF.PdbOrObj = llvm::cast<COFFObjectFile>(IF.CoffObject.getBinary());
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return std::move(IF);
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}
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if (Magic == file_magic::pdb) {
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std::unique_ptr<IPDBSession> Session;
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if (auto Err = loadDataForPDB(PDB_ReaderType::Native, Path, Session))
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return std::move(Err);
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IF.PdbSession.reset(static_cast<NativeSession *>(Session.release()));
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IF.PdbOrObj = &IF.PdbSession->getPDBFile();
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return std::move(IF);
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}
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if (!AllowUnknownFile)
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return make_error<StringError>(
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formatv("File {0} is not a supported file type", Path),
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inconvertibleErrorCode());
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auto Result = MemoryBuffer::getFile(Path, -1LL, false);
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if (!Result)
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return make_error<StringError>(
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formatv("File {0} could not be opened", Path), Result.getError());
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IF.UnknownFile = std::move(*Result);
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IF.PdbOrObj = IF.UnknownFile.get();
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return std::move(IF);
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}
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PDBFile &InputFile::pdb() {
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assert(isPdb());
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return *PdbOrObj.get<PDBFile *>();
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}
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const PDBFile &InputFile::pdb() const {
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assert(isPdb());
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return *PdbOrObj.get<PDBFile *>();
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}
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object::COFFObjectFile &InputFile::obj() {
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assert(isObj());
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return *PdbOrObj.get<object::COFFObjectFile *>();
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}
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const object::COFFObjectFile &InputFile::obj() const {
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assert(isObj());
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return *PdbOrObj.get<object::COFFObjectFile *>();
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}
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MemoryBuffer &InputFile::unknown() {
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assert(isUnknown());
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return *PdbOrObj.get<MemoryBuffer *>();
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}
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const MemoryBuffer &InputFile::unknown() const {
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assert(isUnknown());
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return *PdbOrObj.get<MemoryBuffer *>();
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}
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StringRef InputFile::getFilePath() const {
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if (isPdb())
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return pdb().getFilePath();
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if (isObj())
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return obj().getFileName();
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assert(isUnknown());
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return unknown().getBufferIdentifier();
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}
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bool InputFile::hasTypes() const {
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if (isPdb())
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return pdb().hasPDBTpiStream();
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for (const auto &Section : obj().sections()) {
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CVTypeArray Types;
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if (isDebugTSection(Section, Types))
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return true;
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}
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return false;
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}
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bool InputFile::hasIds() const {
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if (isObj())
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return false;
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return pdb().hasPDBIpiStream();
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}
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bool InputFile::isPdb() const { return PdbOrObj.is<PDBFile *>(); }
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bool InputFile::isObj() const {
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return PdbOrObj.is<object::COFFObjectFile *>();
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}
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bool InputFile::isUnknown() const { return PdbOrObj.is<MemoryBuffer *>(); }
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codeview::LazyRandomTypeCollection &
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InputFile::getOrCreateTypeCollection(TypeCollectionKind Kind) {
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if (Types && Kind == kTypes)
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return *Types;
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if (Ids && Kind == kIds)
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return *Ids;
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if (Kind == kIds) {
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assert(isPdb() && pdb().hasPDBIpiStream());
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}
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// If the collection was already initialized, we should have just returned it
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// in step 1.
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if (isPdb()) {
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TypeCollectionPtr &Collection = (Kind == kIds) ? Ids : Types;
|
||
|
|
auto &Stream = cantFail((Kind == kIds) ? pdb().getPDBIpiStream()
|
||
|
|
: pdb().getPDBTpiStream());
|
||
|
|
|
||
|
|
auto &Array = Stream.typeArray();
|
||
|
|
uint32_t Count = Stream.getNumTypeRecords();
|
||
|
|
auto Offsets = Stream.getTypeIndexOffsets();
|
||
|
|
Collection =
|
||
|
|
std::make_unique<LazyRandomTypeCollection>(Array, Count, Offsets);
|
||
|
|
return *Collection;
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(isObj());
|
||
|
|
assert(Kind == kTypes);
|
||
|
|
assert(!Types);
|
||
|
|
|
||
|
|
for (const auto &Section : obj().sections()) {
|
||
|
|
CVTypeArray Records;
|
||
|
|
if (!isDebugTSection(Section, Records))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
Types = std::make_unique<LazyRandomTypeCollection>(Records, 100);
|
||
|
|
return *Types;
|
||
|
|
}
|
||
|
|
|
||
|
|
Types = std::make_unique<LazyRandomTypeCollection>(100);
|
||
|
|
return *Types;
|
||
|
|
}
|
||
|
|
|
||
|
|
codeview::LazyRandomTypeCollection &InputFile::types() {
|
||
|
|
return getOrCreateTypeCollection(kTypes);
|
||
|
|
}
|
||
|
|
|
||
|
|
codeview::LazyRandomTypeCollection &InputFile::ids() {
|
||
|
|
// Object files have only one type stream that contains both types and ids.
|
||
|
|
// Similarly, some PDBs don't contain an IPI stream, and for those both types
|
||
|
|
// and IDs are in the same stream.
|
||
|
|
if (isObj() || !pdb().hasPDBIpiStream())
|
||
|
|
return types();
|
||
|
|
|
||
|
|
return getOrCreateTypeCollection(kIds);
|
||
|
|
}
|
||
|
|
|
||
|
|
iterator_range<SymbolGroupIterator> InputFile::symbol_groups() {
|
||
|
|
return make_range<SymbolGroupIterator>(symbol_groups_begin(),
|
||
|
|
symbol_groups_end());
|
||
|
|
}
|
||
|
|
|
||
|
|
SymbolGroupIterator InputFile::symbol_groups_begin() {
|
||
|
|
return SymbolGroupIterator(*this);
|
||
|
|
}
|
||
|
|
|
||
|
|
SymbolGroupIterator InputFile::symbol_groups_end() {
|
||
|
|
return SymbolGroupIterator();
|
||
|
|
}
|
||
|
|
|
||
|
|
SymbolGroupIterator::SymbolGroupIterator() : Value(nullptr) {}
|
||
|
|
|
||
|
|
SymbolGroupIterator::SymbolGroupIterator(InputFile &File) : Value(&File) {
|
||
|
|
if (File.isObj()) {
|
||
|
|
SectionIter = File.obj().section_begin();
|
||
|
|
scanToNextDebugS();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bool SymbolGroupIterator::operator==(const SymbolGroupIterator &R) const {
|
||
|
|
bool E = isEnd();
|
||
|
|
bool RE = R.isEnd();
|
||
|
|
if (E || RE)
|
||
|
|
return E == RE;
|
||
|
|
|
||
|
|
if (Value.File != R.Value.File)
|
||
|
|
return false;
|
||
|
|
return Index == R.Index;
|
||
|
|
}
|
||
|
|
|
||
|
|
const SymbolGroup &SymbolGroupIterator::operator*() const {
|
||
|
|
assert(!isEnd());
|
||
|
|
return Value;
|
||
|
|
}
|
||
|
|
SymbolGroup &SymbolGroupIterator::operator*() {
|
||
|
|
assert(!isEnd());
|
||
|
|
return Value;
|
||
|
|
}
|
||
|
|
|
||
|
|
SymbolGroupIterator &SymbolGroupIterator::operator++() {
|
||
|
|
assert(Value.File && !isEnd());
|
||
|
|
++Index;
|
||
|
|
if (isEnd())
|
||
|
|
return *this;
|
||
|
|
|
||
|
|
if (Value.File->isPdb()) {
|
||
|
|
Value.updatePdbModi(Index);
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
|
||
|
|
scanToNextDebugS();
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
|
||
|
|
void SymbolGroupIterator::scanToNextDebugS() {
|
||
|
|
assert(SectionIter.hasValue());
|
||
|
|
auto End = Value.File->obj().section_end();
|
||
|
|
auto &Iter = *SectionIter;
|
||
|
|
assert(!isEnd());
|
||
|
|
|
||
|
|
while (++Iter != End) {
|
||
|
|
DebugSubsectionArray SS;
|
||
|
|
SectionRef SR = *Iter;
|
||
|
|
if (!isDebugSSection(SR, SS))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
Value.updateDebugS(SS);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bool SymbolGroupIterator::isEnd() const {
|
||
|
|
if (!Value.File)
|
||
|
|
return true;
|
||
|
|
if (Value.File->isPdb()) {
|
||
|
|
auto &Dbi = cantFail(Value.File->pdb().getPDBDbiStream());
|
||
|
|
uint32_t Count = Dbi.modules().getModuleCount();
|
||
|
|
assert(Index <= Count);
|
||
|
|
return Index == Count;
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(SectionIter.hasValue());
|
||
|
|
return *SectionIter == Value.File->obj().section_end();
|
||
|
|
}
|