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//===- SampleProfWriter.h - Write LLVM sample profile data ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains definitions needed for writing sample profiles.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_PROFILEDATA_SAMPLEPROFWRITER_H
#define LLVM_PROFILEDATA_SAMPLEPROFWRITER_H
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/IR/ProfileSummary.h"
#include "llvm/ProfileData/SampleProf.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cstdint>
#include <memory>
#include <system_error>
namespace llvm {
namespace sampleprof {
enum SampleProfileFormat { SPF_None = 0, SPF_Text, SPF_Binary, SPF_GCC };
/// \brief Sample-based profile writer. Base class.
class SampleProfileWriter {
public:
virtual ~SampleProfileWriter() = default;
/// Write sample profiles in \p S.
///
/// \returns status code of the file update operation.
virtual std::error_code write(const FunctionSamples &S) = 0;
/// Write all the sample profiles in the given map of samples.
///
/// \returns status code of the file update operation.
std::error_code write(const StringMap<FunctionSamples> &ProfileMap);
raw_ostream &getOutputStream() { return *OutputStream; }
/// Profile writer factory.
///
/// Create a new file writer based on the value of \p Format.
static ErrorOr<std::unique_ptr<SampleProfileWriter>>
create(StringRef Filename, SampleProfileFormat Format);
/// Create a new stream writer based on the value of \p Format.
/// For testing.
static ErrorOr<std::unique_ptr<SampleProfileWriter>>
create(std::unique_ptr<raw_ostream> &OS, SampleProfileFormat Format);
protected:
SampleProfileWriter(std::unique_ptr<raw_ostream> &OS)
: OutputStream(std::move(OS)) {}
/// \brief Write a file header for the profile file.
virtual std::error_code
writeHeader(const StringMap<FunctionSamples> &ProfileMap) = 0;
/// \brief Output stream where to emit the profile to.
std::unique_ptr<raw_ostream> OutputStream;
/// \brief Profile summary.
std::unique_ptr<ProfileSummary> Summary;
/// \brief Compute summary for this profile.
void computeSummary(const StringMap<FunctionSamples> &ProfileMap);
};
/// \brief Sample-based profile writer (text format).
class SampleProfileWriterText : public SampleProfileWriter {
public:
std::error_code write(const FunctionSamples &S) override;
protected:
SampleProfileWriterText(std::unique_ptr<raw_ostream> &OS)
: SampleProfileWriter(OS), Indent(0) {}
std::error_code
writeHeader(const StringMap<FunctionSamples> &ProfileMap) override {
return sampleprof_error::success;
}
private:
/// Indent level to use when writing.
///
/// This is used when printing inlined callees.
unsigned Indent;
friend ErrorOr<std::unique_ptr<SampleProfileWriter>>
SampleProfileWriter::create(std::unique_ptr<raw_ostream> &OS,
SampleProfileFormat Format);
};
/// \brief Sample-based profile writer (binary format).
class SampleProfileWriterBinary : public SampleProfileWriter {
public:
std::error_code write(const FunctionSamples &S) override;
protected:
SampleProfileWriterBinary(std::unique_ptr<raw_ostream> &OS)
: SampleProfileWriter(OS) {}
std::error_code
writeHeader(const StringMap<FunctionSamples> &ProfileMap) override;
std::error_code writeSummary();
std::error_code writeNameIdx(StringRef FName);
std::error_code writeBody(const FunctionSamples &S);
private:
void addName(StringRef FName);
void addNames(const FunctionSamples &S);
MapVector<StringRef, uint32_t> NameTable;
friend ErrorOr<std::unique_ptr<SampleProfileWriter>>
SampleProfileWriter::create(std::unique_ptr<raw_ostream> &OS,
SampleProfileFormat Format);
};
} // end namespace sampleprof
} // end namespace llvm
#endif // LLVM_PROFILEDATA_SAMPLEPROFWRITER_H
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