2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
137 lines
4.5 KiB
C++
137 lines
4.5 KiB
C++
//===- ModuleDebugStream.cpp - PDB Module Info Stream Access --------------===//
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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 "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/SymbolDeserializer.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecordHelpers.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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Reader.setOffset(0);
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if (auto EC = Reader.readSubstream(SymbolsSubstream, SymbolSize))
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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 = SymbolReader.readArray(
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SymbolArray, SymbolReader.bytesRemaining(), sizeof(uint32_t)))
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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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const codeview::CVSymbolArray
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ModuleDebugStreamRef::getSymbolArrayForScope(uint32_t ScopeBegin) const {
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return limitSymbolArrayToScope(SymbolArray, ScopeBegin);
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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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auto Iter = SymbolArray.at(Offset);
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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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