forked from OSchip/llvm-project
705 lines
24 KiB
C++
705 lines
24 KiB
C++
//===- SampleProfWriter.cpp - Write LLVM sample profile data --------------===//
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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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//
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// This file implements the class that writes LLVM sample profiles. It
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// supports two file formats: text and binary. The textual representation
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// is useful for debugging and testing purposes. The binary representation
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// is more compact, resulting in smaller file sizes. However, they can
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// both be used interchangeably.
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//
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// See lib/ProfileData/SampleProfReader.cpp for documentation on each of the
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// supported formats.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ProfileData/SampleProfWriter.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ProfileData/ProfileCommon.h"
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#include "llvm/ProfileData/SampleProf.h"
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#include "llvm/Support/Compression.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/EndianStream.h"
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#include "llvm/Support/ErrorOr.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/LEB128.h"
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#include "llvm/Support/MD5.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cstdint>
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#include <memory>
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#include <set>
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#include <system_error>
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#include <utility>
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#include <vector>
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using namespace llvm;
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using namespace sampleprof;
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std::error_code SampleProfileWriter::writeFuncProfiles(
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const StringMap<FunctionSamples> &ProfileMap) {
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// Sort the ProfileMap by total samples.
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typedef std::pair<StringRef, const FunctionSamples *> NameFunctionSamples;
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std::vector<NameFunctionSamples> V;
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for (const auto &I : ProfileMap)
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V.push_back(std::make_pair(I.getKey(), &I.second));
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llvm::stable_sort(
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V, [](const NameFunctionSamples &A, const NameFunctionSamples &B) {
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if (A.second->getTotalSamples() == B.second->getTotalSamples())
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return A.first > B.first;
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return A.second->getTotalSamples() > B.second->getTotalSamples();
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});
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for (const auto &I : V) {
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if (std::error_code EC = writeSample(*I.second))
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return EC;
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}
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return sampleprof_error::success;
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}
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std::error_code
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SampleProfileWriter::write(const StringMap<FunctionSamples> &ProfileMap) {
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if (std::error_code EC = writeHeader(ProfileMap))
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return EC;
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if (std::error_code EC = writeFuncProfiles(ProfileMap))
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return EC;
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return sampleprof_error::success;
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}
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/// Return the current position and prepare to use it as the start
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/// position of a section given the section type \p Type and its position
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/// \p LayoutIdx in SectionHdrLayout.
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uint64_t
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SampleProfileWriterExtBinaryBase::markSectionStart(SecType Type,
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uint32_t LayoutIdx) {
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uint64_t SectionStart = OutputStream->tell();
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assert(LayoutIdx < SectionHdrLayout.size() && "LayoutIdx out of range");
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const auto &Entry = SectionHdrLayout[LayoutIdx];
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assert(Entry.Type == Type && "Unexpected section type");
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// Use LocalBuf as a temporary output for writting data.
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if (hasSecFlag(Entry, SecCommonFlags::SecFlagCompress))
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LocalBufStream.swap(OutputStream);
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return SectionStart;
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}
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std::error_code SampleProfileWriterExtBinaryBase::compressAndOutput() {
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if (!llvm::zlib::isAvailable())
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return sampleprof_error::zlib_unavailable;
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std::string &UncompressedStrings =
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static_cast<raw_string_ostream *>(LocalBufStream.get())->str();
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if (UncompressedStrings.size() == 0)
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return sampleprof_error::success;
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auto &OS = *OutputStream;
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SmallString<128> CompressedStrings;
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llvm::Error E = zlib::compress(UncompressedStrings, CompressedStrings,
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zlib::BestSizeCompression);
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if (E)
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return sampleprof_error::compress_failed;
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encodeULEB128(UncompressedStrings.size(), OS);
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encodeULEB128(CompressedStrings.size(), OS);
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OS << CompressedStrings.str();
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UncompressedStrings.clear();
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return sampleprof_error::success;
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}
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/// Add a new section into section header table given the section type
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/// \p Type, its position \p LayoutIdx in SectionHdrLayout and the
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/// location \p SectionStart where the section should be written to.
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std::error_code SampleProfileWriterExtBinaryBase::addNewSection(
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SecType Type, uint32_t LayoutIdx, uint64_t SectionStart) {
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assert(LayoutIdx < SectionHdrLayout.size() && "LayoutIdx out of range");
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const auto &Entry = SectionHdrLayout[LayoutIdx];
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assert(Entry.Type == Type && "Unexpected section type");
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if (hasSecFlag(Entry, SecCommonFlags::SecFlagCompress)) {
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LocalBufStream.swap(OutputStream);
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if (std::error_code EC = compressAndOutput())
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return EC;
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}
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SecHdrTable.push_back({Type, Entry.Flags, SectionStart - FileStart,
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OutputStream->tell() - SectionStart, LayoutIdx});
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterExtBinaryBase::write(
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const StringMap<FunctionSamples> &ProfileMap) {
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if (std::error_code EC = writeHeader(ProfileMap))
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return EC;
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std::string LocalBuf;
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LocalBufStream = std::make_unique<raw_string_ostream>(LocalBuf);
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if (std::error_code EC = writeSections(ProfileMap))
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return EC;
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if (std::error_code EC = writeSecHdrTable())
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return EC;
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return sampleprof_error::success;
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}
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std::error_code
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SampleProfileWriterExtBinaryBase::writeSample(const FunctionSamples &S) {
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uint64_t Offset = OutputStream->tell();
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StringRef Name = S.getName();
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FuncOffsetTable[Name] = Offset - SecLBRProfileStart;
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encodeULEB128(S.getHeadSamples(), *OutputStream);
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return writeBody(S);
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}
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std::error_code SampleProfileWriterExtBinaryBase::writeFuncOffsetTable() {
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auto &OS = *OutputStream;
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// Write out the table size.
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encodeULEB128(FuncOffsetTable.size(), OS);
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// Write out FuncOffsetTable.
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for (auto entry : FuncOffsetTable) {
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writeNameIdx(entry.first);
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encodeULEB128(entry.second, OS);
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}
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FuncOffsetTable.clear();
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterExtBinaryBase::writeFuncMetadata(
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const StringMap<FunctionSamples> &Profiles) {
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if (!FunctionSamples::ProfileIsProbeBased)
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return sampleprof_error::success;
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auto &OS = *OutputStream;
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for (const auto &Entry : Profiles) {
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writeNameIdx(Entry.first());
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encodeULEB128(Entry.second.getFunctionHash(), OS);
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}
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterExtBinaryBase::writeNameTable() {
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if (!UseMD5)
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return SampleProfileWriterBinary::writeNameTable();
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auto &OS = *OutputStream;
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std::set<StringRef> V;
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stablizeNameTable(V);
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// Write out the MD5 name table. We wrote unencoded MD5 so reader can
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// retrieve the name using the name index without having to read the
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// whole name table.
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encodeULEB128(NameTable.size(), OS);
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support::endian::Writer Writer(OS, support::little);
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for (auto N : V)
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Writer.write(MD5Hash(N));
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterExtBinaryBase::writeNameTableSection(
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const StringMap<FunctionSamples> &ProfileMap) {
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for (const auto &I : ProfileMap) {
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addName(I.first());
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addNames(I.second);
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}
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if (auto EC = writeNameTable())
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return EC;
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return sampleprof_error::success;
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}
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std::error_code
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SampleProfileWriterExtBinaryBase::writeProfileSymbolListSection() {
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if (ProfSymList && ProfSymList->size() > 0)
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if (std::error_code EC = ProfSymList->write(*OutputStream))
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return EC;
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterExtBinaryBase::writeOneSection(
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SecType Type, uint32_t LayoutIdx,
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const StringMap<FunctionSamples> &ProfileMap) {
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// The setting of SecFlagCompress should happen before markSectionStart.
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if (Type == SecProfileSymbolList && ProfSymList && ProfSymList->toCompress())
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setToCompressSection(SecProfileSymbolList);
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if (Type == SecFuncMetadata && FunctionSamples::ProfileIsProbeBased)
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addSectionFlag(SecFuncMetadata, SecFuncMetadataFlags::SecFlagIsProbeBased);
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uint64_t SectionStart = markSectionStart(Type, LayoutIdx);
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switch (Type) {
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case SecProfSummary:
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computeSummary(ProfileMap);
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if (auto EC = writeSummary())
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return EC;
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break;
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case SecNameTable:
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if (auto EC = writeNameTableSection(ProfileMap))
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return EC;
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break;
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case SecLBRProfile:
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SecLBRProfileStart = OutputStream->tell();
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if (std::error_code EC = writeFuncProfiles(ProfileMap))
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return EC;
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break;
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case SecFuncOffsetTable:
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if (auto EC = writeFuncOffsetTable())
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return EC;
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break;
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case SecFuncMetadata:
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if (std::error_code EC = writeFuncMetadata(ProfileMap))
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return EC;
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break;
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case SecProfileSymbolList:
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if (auto EC = writeProfileSymbolListSection())
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return EC;
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break;
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default:
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if (auto EC = writeCustomSection(Type))
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return EC;
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break;
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}
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if (std::error_code EC = addNewSection(Type, LayoutIdx, SectionStart))
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return EC;
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterExtBinary::writeSections(
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const StringMap<FunctionSamples> &ProfileMap) {
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// The const indices passed to writeOneSection below are specifying the
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// positions of the sections in SectionHdrLayout. Look at
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// initSectionHdrLayout to find out where each section is located in
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// SectionHdrLayout.
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if (auto EC = writeOneSection(SecProfSummary, 0, ProfileMap))
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return EC;
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if (auto EC = writeOneSection(SecNameTable, 1, ProfileMap))
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return EC;
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if (auto EC = writeOneSection(SecLBRProfile, 3, ProfileMap))
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return EC;
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if (auto EC = writeOneSection(SecProfileSymbolList, 4, ProfileMap))
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return EC;
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if (auto EC = writeOneSection(SecFuncOffsetTable, 2, ProfileMap))
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return EC;
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if (auto EC = writeOneSection(SecFuncMetadata, 5, ProfileMap))
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return EC;
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterCompactBinary::write(
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const StringMap<FunctionSamples> &ProfileMap) {
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if (std::error_code EC = SampleProfileWriter::write(ProfileMap))
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return EC;
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if (std::error_code EC = writeFuncOffsetTable())
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return EC;
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return sampleprof_error::success;
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}
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/// Write samples to a text file.
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///
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/// Note: it may be tempting to implement this in terms of
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/// FunctionSamples::print(). Please don't. The dump functionality is intended
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/// for debugging and has no specified form.
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///
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/// The format used here is more structured and deliberate because
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/// it needs to be parsed by the SampleProfileReaderText class.
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std::error_code SampleProfileWriterText::writeSample(const FunctionSamples &S) {
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auto &OS = *OutputStream;
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if (FunctionSamples::ProfileIsCS)
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OS << "[" << S.getNameWithContext() << "]:" << S.getTotalSamples();
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else
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OS << S.getName() << ":" << S.getTotalSamples();
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if (Indent == 0)
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OS << ":" << S.getHeadSamples();
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OS << "\n";
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SampleSorter<LineLocation, SampleRecord> SortedSamples(S.getBodySamples());
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for (const auto &I : SortedSamples.get()) {
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LineLocation Loc = I->first;
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const SampleRecord &Sample = I->second;
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OS.indent(Indent + 1);
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if (Loc.Discriminator == 0)
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OS << Loc.LineOffset << ": ";
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else
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OS << Loc.LineOffset << "." << Loc.Discriminator << ": ";
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OS << Sample.getSamples();
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for (const auto &J : Sample.getSortedCallTargets())
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OS << " " << J.first << ":" << J.second;
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OS << "\n";
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}
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SampleSorter<LineLocation, FunctionSamplesMap> SortedCallsiteSamples(
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S.getCallsiteSamples());
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Indent += 1;
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for (const auto &I : SortedCallsiteSamples.get())
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for (const auto &FS : I->second) {
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LineLocation Loc = I->first;
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const FunctionSamples &CalleeSamples = FS.second;
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OS.indent(Indent);
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if (Loc.Discriminator == 0)
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OS << Loc.LineOffset << ": ";
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else
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OS << Loc.LineOffset << "." << Loc.Discriminator << ": ";
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if (std::error_code EC = writeSample(CalleeSamples))
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return EC;
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}
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Indent -= 1;
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if (Indent == 0) {
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if (FunctionSamples::ProfileIsProbeBased) {
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OS.indent(Indent + 1);
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OS << "!CFGChecksum: " << S.getFunctionHash() << "\n";
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}
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}
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterBinary::writeNameIdx(StringRef FName) {
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const auto &ret = NameTable.find(FName);
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if (ret == NameTable.end())
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return sampleprof_error::truncated_name_table;
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encodeULEB128(ret->second, *OutputStream);
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return sampleprof_error::success;
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}
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void SampleProfileWriterBinary::addName(StringRef FName) {
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NameTable.insert(std::make_pair(FName, 0));
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}
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void SampleProfileWriterBinary::addNames(const FunctionSamples &S) {
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// Add all the names in indirect call targets.
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for (const auto &I : S.getBodySamples()) {
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const SampleRecord &Sample = I.second;
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for (const auto &J : Sample.getCallTargets())
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addName(J.first());
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}
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// Recursively add all the names for inlined callsites.
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for (const auto &J : S.getCallsiteSamples())
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for (const auto &FS : J.second) {
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const FunctionSamples &CalleeSamples = FS.second;
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addName(CalleeSamples.getName());
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addNames(CalleeSamples);
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}
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}
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void SampleProfileWriterBinary::stablizeNameTable(std::set<StringRef> &V) {
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// Sort the names to make NameTable deterministic.
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for (const auto &I : NameTable)
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V.insert(I.first);
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int i = 0;
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for (const StringRef &N : V)
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NameTable[N] = i++;
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}
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std::error_code SampleProfileWriterBinary::writeNameTable() {
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auto &OS = *OutputStream;
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std::set<StringRef> V;
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stablizeNameTable(V);
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// Write out the name table.
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encodeULEB128(NameTable.size(), OS);
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for (auto N : V) {
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OS << N;
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encodeULEB128(0, OS);
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}
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterCompactBinary::writeFuncOffsetTable() {
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auto &OS = *OutputStream;
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// Fill the slot remembered by TableOffset with the offset of FuncOffsetTable.
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auto &OFS = static_cast<raw_fd_ostream &>(OS);
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uint64_t FuncOffsetTableStart = OS.tell();
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if (OFS.seek(TableOffset) == (uint64_t)-1)
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return sampleprof_error::ostream_seek_unsupported;
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support::endian::Writer Writer(*OutputStream, support::little);
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Writer.write(FuncOffsetTableStart);
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if (OFS.seek(FuncOffsetTableStart) == (uint64_t)-1)
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return sampleprof_error::ostream_seek_unsupported;
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// Write out the table size.
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encodeULEB128(FuncOffsetTable.size(), OS);
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// Write out FuncOffsetTable.
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for (auto entry : FuncOffsetTable) {
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writeNameIdx(entry.first);
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encodeULEB128(entry.second, OS);
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}
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterCompactBinary::writeNameTable() {
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auto &OS = *OutputStream;
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std::set<StringRef> V;
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stablizeNameTable(V);
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// Write out the name table.
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encodeULEB128(NameTable.size(), OS);
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for (auto N : V) {
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encodeULEB128(MD5Hash(N), OS);
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}
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return sampleprof_error::success;
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}
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std::error_code
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SampleProfileWriterBinary::writeMagicIdent(SampleProfileFormat Format) {
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auto &OS = *OutputStream;
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// Write file magic identifier.
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encodeULEB128(SPMagic(Format), OS);
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encodeULEB128(SPVersion(), OS);
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return sampleprof_error::success;
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}
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std::error_code SampleProfileWriterBinary::writeHeader(
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const StringMap<FunctionSamples> &ProfileMap) {
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writeMagicIdent(Format);
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computeSummary(ProfileMap);
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if (auto EC = writeSummary())
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return EC;
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// Generate the name table for all the functions referenced in the profile.
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for (const auto &I : ProfileMap) {
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addName(I.first());
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addNames(I.second);
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}
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writeNameTable();
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return sampleprof_error::success;
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}
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void SampleProfileWriterExtBinaryBase::setToCompressAllSections() {
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for (auto &Entry : SectionHdrLayout)
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addSecFlag(Entry, SecCommonFlags::SecFlagCompress);
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}
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void SampleProfileWriterExtBinaryBase::setToCompressSection(SecType Type) {
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addSectionFlag(Type, SecCommonFlags::SecFlagCompress);
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}
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void SampleProfileWriterExtBinaryBase::allocSecHdrTable() {
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support::endian::Writer Writer(*OutputStream, support::little);
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Writer.write(static_cast<uint64_t>(SectionHdrLayout.size()));
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SecHdrTableOffset = OutputStream->tell();
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for (uint32_t i = 0; i < SectionHdrLayout.size(); i++) {
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Writer.write(static_cast<uint64_t>(-1));
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Writer.write(static_cast<uint64_t>(-1));
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Writer.write(static_cast<uint64_t>(-1));
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Writer.write(static_cast<uint64_t>(-1));
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}
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}
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std::error_code SampleProfileWriterExtBinaryBase::writeSecHdrTable() {
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auto &OFS = static_cast<raw_fd_ostream &>(*OutputStream);
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uint64_t Saved = OutputStream->tell();
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// Set OutputStream to the location saved in SecHdrTableOffset.
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if (OFS.seek(SecHdrTableOffset) == (uint64_t)-1)
|
|
return sampleprof_error::ostream_seek_unsupported;
|
|
support::endian::Writer Writer(*OutputStream, support::little);
|
|
|
|
assert(SecHdrTable.size() == SectionHdrLayout.size() &&
|
|
"SecHdrTable entries doesn't match SectionHdrLayout");
|
|
SmallVector<uint32_t, 16> IndexMap(SecHdrTable.size(), -1);
|
|
for (uint32_t TableIdx = 0; TableIdx < SecHdrTable.size(); TableIdx++) {
|
|
IndexMap[SecHdrTable[TableIdx].LayoutIndex] = TableIdx;
|
|
}
|
|
|
|
// Write the section header table in the order specified in
|
|
// SectionHdrLayout. SectionHdrLayout specifies the sections
|
|
// order in which profile reader expect to read, so the section
|
|
// header table should be written in the order in SectionHdrLayout.
|
|
// Note that the section order in SecHdrTable may be different
|
|
// from the order in SectionHdrLayout, for example, SecFuncOffsetTable
|
|
// needs to be computed after SecLBRProfile (the order in SecHdrTable),
|
|
// but it needs to be read before SecLBRProfile (the order in
|
|
// SectionHdrLayout). So we use IndexMap above to switch the order.
|
|
for (uint32_t LayoutIdx = 0; LayoutIdx < SectionHdrLayout.size();
|
|
LayoutIdx++) {
|
|
assert(IndexMap[LayoutIdx] < SecHdrTable.size() &&
|
|
"Incorrect LayoutIdx in SecHdrTable");
|
|
auto Entry = SecHdrTable[IndexMap[LayoutIdx]];
|
|
Writer.write(static_cast<uint64_t>(Entry.Type));
|
|
Writer.write(static_cast<uint64_t>(Entry.Flags));
|
|
Writer.write(static_cast<uint64_t>(Entry.Offset));
|
|
Writer.write(static_cast<uint64_t>(Entry.Size));
|
|
}
|
|
|
|
// Reset OutputStream.
|
|
if (OFS.seek(Saved) == (uint64_t)-1)
|
|
return sampleprof_error::ostream_seek_unsupported;
|
|
|
|
return sampleprof_error::success;
|
|
}
|
|
|
|
std::error_code SampleProfileWriterExtBinaryBase::writeHeader(
|
|
const StringMap<FunctionSamples> &ProfileMap) {
|
|
auto &OS = *OutputStream;
|
|
FileStart = OS.tell();
|
|
writeMagicIdent(Format);
|
|
|
|
allocSecHdrTable();
|
|
return sampleprof_error::success;
|
|
}
|
|
|
|
std::error_code SampleProfileWriterCompactBinary::writeHeader(
|
|
const StringMap<FunctionSamples> &ProfileMap) {
|
|
support::endian::Writer Writer(*OutputStream, support::little);
|
|
if (auto EC = SampleProfileWriterBinary::writeHeader(ProfileMap))
|
|
return EC;
|
|
|
|
// Reserve a slot for the offset of function offset table. The slot will
|
|
// be populated with the offset of FuncOffsetTable later.
|
|
TableOffset = OutputStream->tell();
|
|
Writer.write(static_cast<uint64_t>(-2));
|
|
return sampleprof_error::success;
|
|
}
|
|
|
|
std::error_code SampleProfileWriterBinary::writeSummary() {
|
|
auto &OS = *OutputStream;
|
|
encodeULEB128(Summary->getTotalCount(), OS);
|
|
encodeULEB128(Summary->getMaxCount(), OS);
|
|
encodeULEB128(Summary->getMaxFunctionCount(), OS);
|
|
encodeULEB128(Summary->getNumCounts(), OS);
|
|
encodeULEB128(Summary->getNumFunctions(), OS);
|
|
std::vector<ProfileSummaryEntry> &Entries = Summary->getDetailedSummary();
|
|
encodeULEB128(Entries.size(), OS);
|
|
for (auto Entry : Entries) {
|
|
encodeULEB128(Entry.Cutoff, OS);
|
|
encodeULEB128(Entry.MinCount, OS);
|
|
encodeULEB128(Entry.NumCounts, OS);
|
|
}
|
|
return sampleprof_error::success;
|
|
}
|
|
std::error_code SampleProfileWriterBinary::writeBody(const FunctionSamples &S) {
|
|
auto &OS = *OutputStream;
|
|
|
|
if (std::error_code EC = writeNameIdx(S.getName()))
|
|
return EC;
|
|
|
|
encodeULEB128(S.getTotalSamples(), OS);
|
|
|
|
// Emit all the body samples.
|
|
encodeULEB128(S.getBodySamples().size(), OS);
|
|
for (const auto &I : S.getBodySamples()) {
|
|
LineLocation Loc = I.first;
|
|
const SampleRecord &Sample = I.second;
|
|
encodeULEB128(Loc.LineOffset, OS);
|
|
encodeULEB128(Loc.Discriminator, OS);
|
|
encodeULEB128(Sample.getSamples(), OS);
|
|
encodeULEB128(Sample.getCallTargets().size(), OS);
|
|
for (const auto &J : Sample.getSortedCallTargets()) {
|
|
StringRef Callee = J.first;
|
|
uint64_t CalleeSamples = J.second;
|
|
if (std::error_code EC = writeNameIdx(Callee))
|
|
return EC;
|
|
encodeULEB128(CalleeSamples, OS);
|
|
}
|
|
}
|
|
|
|
// Recursively emit all the callsite samples.
|
|
uint64_t NumCallsites = 0;
|
|
for (const auto &J : S.getCallsiteSamples())
|
|
NumCallsites += J.second.size();
|
|
encodeULEB128(NumCallsites, OS);
|
|
for (const auto &J : S.getCallsiteSamples())
|
|
for (const auto &FS : J.second) {
|
|
LineLocation Loc = J.first;
|
|
const FunctionSamples &CalleeSamples = FS.second;
|
|
encodeULEB128(Loc.LineOffset, OS);
|
|
encodeULEB128(Loc.Discriminator, OS);
|
|
if (std::error_code EC = writeBody(CalleeSamples))
|
|
return EC;
|
|
}
|
|
|
|
return sampleprof_error::success;
|
|
}
|
|
|
|
/// Write samples of a top-level function to a binary file.
|
|
///
|
|
/// \returns true if the samples were written successfully, false otherwise.
|
|
std::error_code
|
|
SampleProfileWriterBinary::writeSample(const FunctionSamples &S) {
|
|
encodeULEB128(S.getHeadSamples(), *OutputStream);
|
|
return writeBody(S);
|
|
}
|
|
|
|
std::error_code
|
|
SampleProfileWriterCompactBinary::writeSample(const FunctionSamples &S) {
|
|
uint64_t Offset = OutputStream->tell();
|
|
StringRef Name = S.getName();
|
|
FuncOffsetTable[Name] = Offset;
|
|
encodeULEB128(S.getHeadSamples(), *OutputStream);
|
|
return writeBody(S);
|
|
}
|
|
|
|
/// Create a sample profile file writer based on the specified format.
|
|
///
|
|
/// \param Filename The file to create.
|
|
///
|
|
/// \param Format Encoding format for the profile file.
|
|
///
|
|
/// \returns an error code indicating the status of the created writer.
|
|
ErrorOr<std::unique_ptr<SampleProfileWriter>>
|
|
SampleProfileWriter::create(StringRef Filename, SampleProfileFormat Format) {
|
|
std::error_code EC;
|
|
std::unique_ptr<raw_ostream> OS;
|
|
if (Format == SPF_Binary || Format == SPF_Ext_Binary ||
|
|
Format == SPF_Compact_Binary)
|
|
OS.reset(new raw_fd_ostream(Filename, EC, sys::fs::OF_None));
|
|
else
|
|
OS.reset(new raw_fd_ostream(Filename, EC, sys::fs::OF_Text));
|
|
if (EC)
|
|
return EC;
|
|
|
|
return create(OS, Format);
|
|
}
|
|
|
|
/// Create a sample profile stream writer based on the specified format.
|
|
///
|
|
/// \param OS The output stream to store the profile data to.
|
|
///
|
|
/// \param Format Encoding format for the profile file.
|
|
///
|
|
/// \returns an error code indicating the status of the created writer.
|
|
ErrorOr<std::unique_ptr<SampleProfileWriter>>
|
|
SampleProfileWriter::create(std::unique_ptr<raw_ostream> &OS,
|
|
SampleProfileFormat Format) {
|
|
std::error_code EC;
|
|
std::unique_ptr<SampleProfileWriter> Writer;
|
|
|
|
if (Format == SPF_Binary)
|
|
Writer.reset(new SampleProfileWriterRawBinary(OS));
|
|
else if (Format == SPF_Ext_Binary)
|
|
Writer.reset(new SampleProfileWriterExtBinary(OS));
|
|
else if (Format == SPF_Compact_Binary)
|
|
Writer.reset(new SampleProfileWriterCompactBinary(OS));
|
|
else if (Format == SPF_Text)
|
|
Writer.reset(new SampleProfileWriterText(OS));
|
|
else if (Format == SPF_GCC)
|
|
EC = sampleprof_error::unsupported_writing_format;
|
|
else
|
|
EC = sampleprof_error::unrecognized_format;
|
|
|
|
if (EC)
|
|
return EC;
|
|
|
|
Writer->Format = Format;
|
|
return std::move(Writer);
|
|
}
|
|
|
|
void SampleProfileWriter::computeSummary(
|
|
const StringMap<FunctionSamples> &ProfileMap) {
|
|
SampleProfileSummaryBuilder Builder(ProfileSummaryBuilder::DefaultCutoffs);
|
|
for (const auto &I : ProfileMap) {
|
|
const FunctionSamples &Profile = I.second;
|
|
Builder.addRecord(Profile);
|
|
}
|
|
Summary = Builder.getSummary();
|
|
}
|