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//==- NativeEnumInjectedSources.cpp - Native Injected Source Enumerator --*-==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/PDB/Native/NativeEnumInjectedSources.h"
#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
#include "llvm/DebugInfo/PDB/Native/HashTable.h"
#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
#include "llvm/DebugInfo/PDB/Native/PDBStringTable.h"
#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
namespace llvm {
namespace pdb {
namespace {
Expected<std::string> readStreamData(BinaryStream &Stream, uint64_t Limit) {
uint64_t Offset = 0, DataLength = std::min(Limit, Stream.getLength());
std::string Result;
Result.reserve(DataLength);
while (Offset < DataLength) {
ArrayRef<uint8_t> Data;
if (auto E = Stream.readLongestContiguousChunk(Offset, Data))
return std::move(E);
Data = Data.take_front(DataLength - Offset);
Offset += Data.size();
Result += toStringRef(Data);
}
return Result;
}
class NativeInjectedSource final : public IPDBInjectedSource {
const SrcHeaderBlockEntry &Entry;
const PDBStringTable &Strings;
PDBFile &File;
public:
NativeInjectedSource(const SrcHeaderBlockEntry &Entry,
PDBFile &File, const PDBStringTable &Strings)
: Entry(Entry), Strings(Strings), File(File) {}
uint32_t getCrc32() const override { return Entry.CRC; }
uint64_t getCodeByteSize() const override { return Entry.FileSize; }
std::string getFileName() const override {
StringRef Ret = cantFail(Strings.getStringForID(Entry.FileNI),
"InjectedSourceStream should have rejected this");
return std::string(Ret);
}
std::string getObjectFileName() const override {
StringRef Ret = cantFail(Strings.getStringForID(Entry.ObjNI),
"InjectedSourceStream should have rejected this");
return std::string(Ret);
}
std::string getVirtualFileName() const override {
StringRef Ret = cantFail(Strings.getStringForID(Entry.VFileNI),
"InjectedSourceStream should have rejected this");
return std::string(Ret);
}
uint32_t getCompression() const override { return Entry.Compression; }
std::string getCode() const override {
// Get name of stream storing the data.
StringRef VName =
cantFail(Strings.getStringForID(Entry.VFileNI),
"InjectedSourceStream should have rejected this");
std::string StreamName = ("/src/files/" + VName).str();
// Find stream with that name and read its data.
// FIXME: Consider validating (or even loading) all this in
// InjectedSourceStream so that no error can happen here.
auto ExpectedFileStream = File.safelyCreateNamedStream(StreamName);
if (!ExpectedFileStream) {
consumeError(ExpectedFileStream.takeError());
return "(failed to open data stream)";
}
auto Data = readStreamData(**ExpectedFileStream, Entry.FileSize);
if (!Data) {
consumeError(Data.takeError());
return "(failed to read data)";
}
return *Data;
}
};
} // namespace
NativeEnumInjectedSources::NativeEnumInjectedSources(
PDBFile &File, const InjectedSourceStream &IJS,
const PDBStringTable &Strings)
: File(File), Stream(IJS), Strings(Strings), Cur(Stream.begin()) {}
uint32_t NativeEnumInjectedSources::getChildCount() const {
return static_cast<uint32_t>(Stream.size());
}
std::unique_ptr<IPDBInjectedSource>
NativeEnumInjectedSources::getChildAtIndex(uint32_t N) const {
if (N >= getChildCount())
return nullptr;
return std::make_unique<NativeInjectedSource>(std::next(Stream.begin(), N)->second,
File, Strings);
}
std::unique_ptr<IPDBInjectedSource> NativeEnumInjectedSources::getNext() {
if (Cur == Stream.end())
return nullptr;
return std::make_unique<NativeInjectedSource>((Cur++)->second, File, Strings);
}
void NativeEnumInjectedSources::reset() { Cur = Stream.begin(); }
}
}
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