203 lines
7.9 KiB
C++
203 lines
7.9 KiB
C++
//===- xray-converter.cc - XRay Trace Conversion --------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Implements the trace conversion functions.
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//
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//===----------------------------------------------------------------------===//
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#include "xray-converter.h"
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#include "xray-extract.h"
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#include "xray-registry.h"
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#include "llvm/DebugInfo/Symbolize/Symbolize.h"
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#include "llvm/Support/EndianStream.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/YAMLTraits.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/XRay/Trace.h"
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#include "llvm/XRay/YAMLXRayRecord.h"
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using namespace llvm;
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using namespace xray;
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// llvm-xray convert
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// ----------------------------------------------------------------------------
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static cl::SubCommand Convert("convert", "Trace Format Conversion");
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static cl::opt<std::string> ConvertInput(cl::Positional,
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cl::desc("<xray log file>"),
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cl::Required, cl::sub(Convert));
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enum class ConvertFormats { BINARY, YAML };
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static cl::opt<ConvertFormats> ConvertOutputFormat(
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"output-format", cl::desc("output format"),
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cl::values(clEnumValN(ConvertFormats::BINARY, "raw", "output in binary"),
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clEnumValN(ConvertFormats::YAML, "yaml", "output in yaml")),
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cl::sub(Convert));
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static cl::alias ConvertOutputFormat2("f", cl::aliasopt(ConvertOutputFormat),
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cl::desc("Alias for -output-format"),
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cl::sub(Convert));
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static cl::opt<std::string>
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ConvertOutput("output", cl::value_desc("output file"), cl::init("-"),
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cl::desc("output file; use '-' for stdout"),
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cl::sub(Convert));
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static cl::alias ConvertOutput2("o", cl::aliasopt(ConvertOutput),
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cl::desc("Alias for -output"),
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cl::sub(Convert));
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static cl::opt<bool>
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ConvertSymbolize("symbolize",
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cl::desc("symbolize function ids from the input log"),
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cl::init(false), cl::sub(Convert));
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static cl::alias ConvertSymbolize2("y", cl::aliasopt(ConvertSymbolize),
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cl::desc("Alias for -symbolize"),
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cl::sub(Convert));
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static cl::opt<std::string>
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ConvertInstrMap("instr_map",
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cl::desc("binary with the instrumentation map, or "
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"a separate instrumentation map"),
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cl::value_desc("binary with xray_instr_map"),
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cl::sub(Convert), cl::init(""));
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static cl::alias ConvertInstrMap2("m", cl::aliasopt(ConvertInstrMap),
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cl::desc("Alias for -instr_map"),
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cl::sub(Convert));
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static cl::opt<bool> ConvertSortInput(
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"sort",
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cl::desc("determines whether to sort input log records by timestamp"),
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cl::sub(Convert), cl::init(true));
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static cl::alias ConvertSortInput2("s", cl::aliasopt(ConvertSortInput),
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cl::desc("Alias for -sort"),
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cl::sub(Convert));
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static cl::opt<InstrumentationMapExtractor::InputFormats> InstrMapFormat(
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"instr-map-format", cl::desc("format of instrumentation map"),
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cl::values(clEnumValN(InstrumentationMapExtractor::InputFormats::ELF, "elf",
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"instrumentation map in an ELF header"),
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clEnumValN(InstrumentationMapExtractor::InputFormats::YAML,
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"yaml", "instrumentation map in YAML")),
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cl::sub(Convert), cl::init(InstrumentationMapExtractor::InputFormats::ELF));
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static cl::alias InstrMapFormat2("t", cl::aliasopt(InstrMapFormat),
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cl::desc("Alias for -instr-map-format"),
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cl::sub(Convert));
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using llvm::yaml::IO;
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using llvm::yaml::Output;
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void TraceConverter::exportAsYAML(const Trace &Records, raw_ostream &OS) {
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YAMLXRayTrace Trace;
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const auto &FH = Records.getFileHeader();
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Trace.Header = {FH.Version, FH.Type, FH.ConstantTSC, FH.NonstopTSC,
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FH.CycleFrequency};
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Trace.Records.reserve(Records.size());
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for (const auto &R : Records) {
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Trace.Records.push_back({R.RecordType, R.CPU, R.Type, R.FuncId,
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Symbolize ? FuncIdHelper.SymbolOrNumber(R.FuncId)
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: std::to_string(R.FuncId),
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R.TSC, R.TId});
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}
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Output Out(OS);
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Out << Trace;
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}
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void TraceConverter::exportAsRAWv1(const Trace &Records, raw_ostream &OS) {
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// First write out the file header, in the correct endian-appropriate format
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// (XRay assumes currently little endian).
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support::endian::Writer<support::endianness::little> Writer(OS);
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const auto &FH = Records.getFileHeader();
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Writer.write(FH.Version);
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Writer.write(FH.Type);
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uint32_t Bitfield{0};
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if (FH.ConstantTSC)
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Bitfield |= 1uL;
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if (FH.NonstopTSC)
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Bitfield |= 1uL << 1;
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Writer.write(Bitfield);
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Writer.write(FH.CycleFrequency);
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// There's 16 bytes of padding at the end of the file header.
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static constexpr uint32_t Padding4B = 0;
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Writer.write(Padding4B);
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Writer.write(Padding4B);
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Writer.write(Padding4B);
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Writer.write(Padding4B);
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// Then write out the rest of the records, still in an endian-appropriate
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// format.
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for (const auto &R : Records) {
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Writer.write(R.RecordType);
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Writer.write(R.CPU);
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switch (R.Type) {
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case RecordTypes::ENTER:
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Writer.write(uint8_t{0});
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break;
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case RecordTypes::EXIT:
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Writer.write(uint8_t{1});
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break;
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}
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Writer.write(R.FuncId);
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Writer.write(R.TSC);
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Writer.write(R.TId);
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Writer.write(Padding4B);
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Writer.write(Padding4B);
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Writer.write(Padding4B);
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}
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}
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namespace llvm {
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namespace xray {
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static CommandRegistration Unused(&Convert, []() -> Error {
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// FIXME: Support conversion to BINARY when upgrading XRay trace versions.
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int Fd;
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auto EC = sys::fs::openFileForRead(ConvertInput, Fd);
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if (EC)
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return make_error<StringError>(
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Twine("Cannot open file '") + ConvertInput + "'", EC);
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Error Err = Error::success();
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xray::InstrumentationMapExtractor Extractor(ConvertInstrMap, InstrMapFormat,
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Err);
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handleAllErrors(std::move(Err),
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[&](const ErrorInfoBase &E) { E.log(errs()); });
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const auto &FunctionAddresses = Extractor.getFunctionAddresses();
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symbolize::LLVMSymbolizer::Options Opts(
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symbolize::FunctionNameKind::LinkageName, true, true, false, "");
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symbolize::LLVMSymbolizer Symbolizer(Opts);
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llvm::xray::FuncIdConversionHelper FuncIdHelper(ConvertInstrMap, Symbolizer,
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FunctionAddresses);
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llvm::xray::TraceConverter TC(FuncIdHelper, ConvertSymbolize);
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raw_fd_ostream OS(ConvertOutput, EC,
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ConvertOutputFormat == ConvertFormats::BINARY
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? sys::fs::OpenFlags::F_None
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: sys::fs::OpenFlags::F_Text);
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if (EC)
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return make_error<StringError>(
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Twine("Cannot open file '") + ConvertOutput + "' for writing.", EC);
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if (auto TraceOrErr = loadTraceFile(ConvertInput, ConvertSortInput)) {
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auto &T = *TraceOrErr;
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switch (ConvertOutputFormat) {
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case ConvertFormats::YAML:
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TC.exportAsYAML(T, OS);
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break;
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case ConvertFormats::BINARY:
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TC.exportAsRAWv1(T, OS);
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break;
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}
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} else {
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return joinErrors(
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make_error<StringError>(
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Twine("Failed loading input file '") + ConvertInput + "'.",
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std::make_error_code(std::errc::executable_format_error)),
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TraceOrErr.takeError());
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}
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return Error::success();
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});
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} // namespace xray
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} // namespace llvm
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