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