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