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8776469f14
The Globals table is a hash table keyed on symbol name, so it's possible to lookup symbols by name in O(1) time. Add a function to the globals stream to do this, and add an option to llvm-pdbutil to exercise this, then use it to write some tests to verify correctness. llvm-svn: 343951
132 lines
4.3 KiB
C++
132 lines
4.3 KiB
C++
//===- ModuleDebugStream.cpp - PDB Module Info Stream Access --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/PDB/Native/ModuleDebugStream.h"
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#include "llvm/ADT/iterator_range.h"
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#include "llvm/DebugInfo/CodeView/CodeView.h"
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#include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
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#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
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#include "llvm/DebugInfo/PDB/Native/RawError.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/BinaryStreamRef.h"
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#include "llvm/Support/Error.h"
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#include <algorithm>
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#include <cstdint>
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using namespace llvm;
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using namespace llvm::codeview;
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using namespace llvm::msf;
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using namespace llvm::pdb;
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ModuleDebugStreamRef::ModuleDebugStreamRef(
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const DbiModuleDescriptor &Module,
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std::unique_ptr<MappedBlockStream> Stream)
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: Mod(Module), Stream(std::move(Stream)) {}
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ModuleDebugStreamRef::~ModuleDebugStreamRef() = default;
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Error ModuleDebugStreamRef::reload() {
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BinaryStreamReader Reader(*Stream);
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uint32_t SymbolSize = Mod.getSymbolDebugInfoByteSize();
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uint32_t C11Size = Mod.getC11LineInfoByteSize();
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uint32_t C13Size = Mod.getC13LineInfoByteSize();
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if (C11Size > 0 && C13Size > 0)
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return make_error<RawError>(raw_error_code::corrupt_file,
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"Module has both C11 and C13 line info");
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BinaryStreamRef S;
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if (auto EC = Reader.readInteger(Signature))
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return EC;
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if (auto EC = Reader.readSubstream(SymbolsSubstream, SymbolSize - 4))
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return EC;
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if (auto EC = Reader.readSubstream(C11LinesSubstream, C11Size))
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return EC;
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if (auto EC = Reader.readSubstream(C13LinesSubstream, C13Size))
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return EC;
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BinaryStreamReader SymbolReader(SymbolsSubstream.StreamData);
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if (auto EC =
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SymbolReader.readArray(SymbolArray, SymbolReader.bytesRemaining()))
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return EC;
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BinaryStreamReader SubsectionsReader(C13LinesSubstream.StreamData);
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if (auto EC = SubsectionsReader.readArray(Subsections,
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SubsectionsReader.bytesRemaining()))
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return EC;
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uint32_t GlobalRefsSize;
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if (auto EC = Reader.readInteger(GlobalRefsSize))
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return EC;
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if (auto EC = Reader.readSubstream(GlobalRefsSubstream, GlobalRefsSize))
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return EC;
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if (Reader.bytesRemaining() > 0)
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return make_error<RawError>(raw_error_code::corrupt_file,
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"Unexpected bytes in module stream.");
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return Error::success();
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}
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BinarySubstreamRef ModuleDebugStreamRef::getSymbolsSubstream() const {
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return SymbolsSubstream;
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}
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BinarySubstreamRef ModuleDebugStreamRef::getC11LinesSubstream() const {
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return C11LinesSubstream;
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}
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BinarySubstreamRef ModuleDebugStreamRef::getC13LinesSubstream() const {
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return C13LinesSubstream;
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}
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BinarySubstreamRef ModuleDebugStreamRef::getGlobalRefsSubstream() const {
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return GlobalRefsSubstream;
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}
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iterator_range<codeview::CVSymbolArray::Iterator>
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ModuleDebugStreamRef::symbols(bool *HadError) const {
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return make_range(SymbolArray.begin(HadError), SymbolArray.end());
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}
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CVSymbol ModuleDebugStreamRef::readSymbolAtOffset(uint32_t Offset) const {
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// Offsets include the size of the 4-byte magic at the beginning, but lookup
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// doesn't take that into account, so subtract it here.
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auto Iter = SymbolArray.at(Offset - 4);
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assert(Iter != SymbolArray.end());
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return *Iter;
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}
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iterator_range<ModuleDebugStreamRef::DebugSubsectionIterator>
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ModuleDebugStreamRef::subsections() const {
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return make_range(Subsections.begin(), Subsections.end());
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}
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bool ModuleDebugStreamRef::hasDebugSubsections() const {
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return !C13LinesSubstream.empty();
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}
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Error ModuleDebugStreamRef::commit() { return Error::success(); }
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Expected<codeview::DebugChecksumsSubsectionRef>
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ModuleDebugStreamRef::findChecksumsSubsection() const {
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codeview::DebugChecksumsSubsectionRef Result;
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for (const auto &SS : subsections()) {
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if (SS.kind() != DebugSubsectionKind::FileChecksums)
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continue;
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if (auto EC = Result.initialize(SS.getRecordData()))
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return std::move(EC);
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return Result;
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}
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return Result;
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}
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