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//===- YAMLRemarkSerializer.cpp -------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file provides the implementation of the YAML remark serializer using
// LLVM's YAMLTraits.
//
//===----------------------------------------------------------------------===//
#include "llvm/Remarks/YAMLRemarkSerializer.h"
#include "llvm/Remarks/Remark.h"
#include "llvm/Support/FileSystem.h"
#include <optional>
using namespace llvm;
using namespace llvm::remarks;
// Use the same keys whether we use a string table or not (respectively, T is an
// unsigned or a StringRef).
static void
mapRemarkHeader(yaml::IO &io, StringRef PassName, StringRef RemarkName,
std::optional<RemarkLocation> RL, StringRef FunctionName,
std::optional<uint64_t> Hotness, ArrayRef<Argument> Args) {
io.mapRequired("Pass", PassName);
io.mapRequired("Name", RemarkName);
io.mapOptional("DebugLoc", RL);
io.mapRequired("Function", FunctionName);
io.mapOptional("Hotness", Hotness);
io.mapOptional("Args", Args);
}
namespace llvm {
namespace yaml {
template <> struct MappingTraits<remarks::Remark *> {
static void mapping(IO &io, remarks::Remark *&Remark) {
assert(io.outputting() && "input not yet implemented");
if (io.mapTag("!Passed", (Remark->RemarkType == Type::Passed)))
;
else if (io.mapTag("!Missed", (Remark->RemarkType == Type::Missed)))
;
else if (io.mapTag("!Analysis", (Remark->RemarkType == Type::Analysis)))
;
else if (io.mapTag("!AnalysisFPCommute",
(Remark->RemarkType == Type::AnalysisFPCommute)))
;
else if (io.mapTag("!AnalysisAliasing",
(Remark->RemarkType == Type::AnalysisAliasing)))
;
else if (io.mapTag("!Failure", (Remark->RemarkType == Type::Failure)))
;
else
llvm_unreachable("Unknown remark type");
mapRemarkHeader(io, Remark->PassName, Remark->RemarkName, Remark->Loc,
Remark->FunctionName, Remark->Hotness, Remark->Args);
}
};
template <> struct MappingTraits<RemarkLocation> {
static void mapping(IO &io, RemarkLocation &RL) {
assert(io.outputting() && "input not yet implemented");
StringRef File = RL.SourceFilePath;
unsigned Line = RL.SourceLine;
unsigned Col = RL.SourceColumn;
io.mapRequired("File", File);
io.mapRequired("Line", Line);
io.mapRequired("Column", Col);
}
static const bool flow = true;
};
/// Helper struct for multiline string block literals. Use this type to preserve
/// newlines in strings.
struct StringBlockVal {
StringRef Value;
StringBlockVal(StringRef R) : Value(R) {}
};
template <> struct BlockScalarTraits<StringBlockVal> {
static void output(const StringBlockVal &S, void *Ctx, raw_ostream &OS) {
return ScalarTraits<StringRef>::output(S.Value, Ctx, OS);
}
static StringRef input(StringRef Scalar, void *Ctx, StringBlockVal &S) {
return ScalarTraits<StringRef>::input(Scalar, Ctx, S.Value);
}
};
/// ArrayRef is not really compatible with the YAMLTraits. Everything should be
/// immutable in an ArrayRef, while the SequenceTraits expect a mutable version
/// for inputting, but we're only using the outputting capabilities here.
/// This is a hack, but still nicer than having to manually call the YAMLIO
/// internal methods.
/// Keep this in this file so that it doesn't get misused from YAMLTraits.h.
template <typename T> struct SequenceTraits<ArrayRef<T>> {
static size_t size(IO &io, ArrayRef<T> &seq) { return seq.size(); }
static Argument &element(IO &io, ArrayRef<T> &seq, size_t index) {
assert(io.outputting() && "input not yet implemented");
// The assert above should make this "safer" to satisfy the YAMLTraits.
return const_cast<T &>(seq[index]);
}
};
/// Implement this as a mapping for now to get proper quotation for the value.
template <> struct MappingTraits<Argument> {
static void mapping(IO &io, Argument &A) {
assert(io.outputting() && "input not yet implemented");
if (StringRef(A.Val).count('\n') > 1) {
StringBlockVal S(A.Val);
io.mapRequired(A.Key.data(), S);
} else {
io.mapRequired(A.Key.data(), A.Val);
}
io.mapOptional("DebugLoc", A.Loc);
}
};
} // end namespace yaml
} // end namespace llvm
LLVM_YAML_IS_SEQUENCE_VECTOR(Argument)
YAMLRemarkSerializer::YAMLRemarkSerializer(raw_ostream &OS, SerializerMode Mode,
std::optional<StringTable> StrTabIn)
: RemarkSerializer(Format::YAML, OS, Mode),
YAMLOutput(OS, reinterpret_cast<void *>(this)) {
StrTab = std::move(StrTabIn);
}
void YAMLRemarkSerializer::emit(const Remark &Remark) {
// Again, YAMLTraits expect a non-const object for inputting, but we're not
// using that here.
auto *R = const_cast<remarks::Remark *>(&Remark);
YAMLOutput << R;
}
std::unique_ptr<MetaSerializer> YAMLRemarkSerializer::metaSerializer(
raw_ostream &OS, std::optional<StringRef> ExternalFilename) {
return std::make_unique<YAMLMetaSerializer>(OS, ExternalFilename);
}
static void emitMagic(raw_ostream &OS) {
// Emit the magic number.
OS << remarks::Magic;
// Explicitly emit a '\0'.
OS.write('\0');
}
static void emitVersion(raw_ostream &OS) {
// Emit the version number: little-endian uint64_t.
std::array<char, 8> Version;
support::endian::write64le(Version.data(), remarks::CurrentRemarkVersion);
OS.write(Version.data(), Version.size());
}
static void emitExternalFile(raw_ostream &OS, StringRef Filename) {
// Emit the null-terminated absolute path to the remark file.
SmallString<128> FilenameBuf = Filename;
sys::fs::make_absolute(FilenameBuf);
assert(!FilenameBuf.empty() && "The filename can't be empty.");
OS.write(FilenameBuf.data(), FilenameBuf.size());
OS.write('\0');
}
void YAMLMetaSerializer::emit() {
emitMagic(OS);
emitVersion(OS);
// Emit StringTable with size 0. This is left over after removing StringTable
// support from the YAML format. For now, don't unnecessarily change how the
// the metadata is serialized. When changing the format, we should think about
// just reusing the bitstream remark meta for this.
uint64_t StrTabSize = 0;
std::array<char, 8> StrTabSizeBuf;
support::endian::write64le(StrTabSizeBuf.data(), StrTabSize);
OS.write(StrTabSizeBuf.data(), StrTabSizeBuf.size());
if (ExternalFilename)
emitExternalFile(OS, *ExternalFilename);
}
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