forked from OSchip/llvm-project
536 lines
20 KiB
C++
536 lines
20 KiB
C++
//===- unittest/ProfileData/SampleProfTest.cpp ------------------*- C++ -*-===//
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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/ProfileData/SampleProf.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/IR/DebugInfoMetadata.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Metadata.h"
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#include "llvm/IR/Module.h"
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#include "llvm/ProfileData/SampleProfReader.h"
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#include "llvm/ProfileData/SampleProfWriter.h"
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#include "llvm/Support/Casting.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/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Testing/Support/SupportHelpers.h"
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#include "gtest/gtest.h"
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#include <string>
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#include <vector>
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using namespace llvm;
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using namespace sampleprof;
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using llvm::unittest::TempFile;
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static ::testing::AssertionResult NoError(std::error_code EC) {
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if (!EC)
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return ::testing::AssertionSuccess();
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return ::testing::AssertionFailure() << "error " << EC.value() << ": "
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<< EC.message();
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}
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namespace {
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struct SampleProfTest : ::testing::Test {
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LLVMContext Context;
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std::unique_ptr<SampleProfileWriter> Writer;
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std::unique_ptr<SampleProfileReader> Reader;
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SampleProfTest() : Writer(), Reader() {}
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void createWriter(SampleProfileFormat Format, StringRef Profile) {
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std::error_code EC;
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std::unique_ptr<raw_ostream> OS(
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new raw_fd_ostream(Profile, EC, sys::fs::OF_None));
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auto WriterOrErr = SampleProfileWriter::create(OS, Format);
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ASSERT_TRUE(NoError(WriterOrErr.getError()));
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Writer = std::move(WriterOrErr.get());
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}
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void readProfile(const Module &M, StringRef Profile,
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StringRef RemapFile = "") {
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auto ReaderOrErr = SampleProfileReader::create(
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std::string(Profile), Context, FSDiscriminatorPass::Base,
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std::string(RemapFile));
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ASSERT_TRUE(NoError(ReaderOrErr.getError()));
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Reader = std::move(ReaderOrErr.get());
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Reader->setModule(&M);
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}
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TempFile createRemapFile() {
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return TempFile("remapfile", "", R"(
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# Types 'int' and 'long' are equivalent
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type i l
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# Function names 'foo' and 'faux' are equivalent
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name 3foo 4faux
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)",
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/*Unique*/ true);
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}
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// Verify profile summary is consistent in the roundtrip to and from
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// Metadata. \p AddPartialField is to choose whether the Metadata
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// contains the IsPartialProfile field which is optional.
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void verifyProfileSummary(ProfileSummary &Summary, Module &M,
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const bool AddPartialField,
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const bool AddPartialProfileRatioField) {
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LLVMContext &Context = M.getContext();
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const bool IsPartialProfile = Summary.isPartialProfile();
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const double PartialProfileRatio = Summary.getPartialProfileRatio();
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auto VerifySummary = [IsPartialProfile, PartialProfileRatio](
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ProfileSummary &Summary) mutable {
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ASSERT_EQ(ProfileSummary::PSK_Sample, Summary.getKind());
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ASSERT_EQ(138211u, Summary.getTotalCount());
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ASSERT_EQ(10u, Summary.getNumCounts());
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ASSERT_EQ(4u, Summary.getNumFunctions());
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ASSERT_EQ(1437u, Summary.getMaxFunctionCount());
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ASSERT_EQ(60351u, Summary.getMaxCount());
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ASSERT_EQ(IsPartialProfile, Summary.isPartialProfile());
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ASSERT_EQ(PartialProfileRatio, Summary.getPartialProfileRatio());
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uint32_t Cutoff = 800000;
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auto Predicate = [&Cutoff](const ProfileSummaryEntry &PE) {
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return PE.Cutoff == Cutoff;
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};
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const std::vector<ProfileSummaryEntry> &Details =
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Summary.getDetailedSummary();
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auto EightyPerc = find_if(Details, Predicate);
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Cutoff = 900000;
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auto NinetyPerc = find_if(Details, Predicate);
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Cutoff = 950000;
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auto NinetyFivePerc = find_if(Details, Predicate);
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Cutoff = 990000;
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auto NinetyNinePerc = find_if(Details, Predicate);
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ASSERT_EQ(60000u, EightyPerc->MinCount);
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ASSERT_EQ(12557u, NinetyPerc->MinCount);
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ASSERT_EQ(12557u, NinetyFivePerc->MinCount);
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ASSERT_EQ(600u, NinetyNinePerc->MinCount);
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};
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VerifySummary(Summary);
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// Test that conversion of summary to and from Metadata works.
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Metadata *MD =
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Summary.getMD(Context, AddPartialField, AddPartialProfileRatioField);
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ASSERT_TRUE(MD);
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ProfileSummary *PS = ProfileSummary::getFromMD(MD);
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ASSERT_TRUE(PS);
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VerifySummary(*PS);
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delete PS;
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// Test that summary can be attached to and read back from module.
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M.eraseNamedMetadata(M.getOrInsertModuleFlagsMetadata());
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M.setProfileSummary(MD, ProfileSummary::PSK_Sample);
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MD = M.getProfileSummary(/* IsCS */ false);
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ASSERT_TRUE(MD);
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PS = ProfileSummary::getFromMD(MD);
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ASSERT_TRUE(PS);
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VerifySummary(*PS);
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delete PS;
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}
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void testRoundTrip(SampleProfileFormat Format, bool Remap, bool UseMD5) {
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TempFile ProfileFile("profile", "", "", /*Unique*/ true);
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createWriter(Format, ProfileFile.path());
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if (Format == SampleProfileFormat::SPF_Ext_Binary && UseMD5)
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static_cast<SampleProfileWriterExtBinary *>(Writer.get())->setUseMD5();
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StringRef FooName("_Z3fooi");
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FunctionSamples FooSamples;
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FooSamples.setName(FooName);
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FooSamples.addTotalSamples(7711);
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FooSamples.addHeadSamples(610);
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FooSamples.addBodySamples(1, 0, 610);
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FooSamples.addBodySamples(2, 0, 600);
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FooSamples.addBodySamples(4, 0, 60000);
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FooSamples.addBodySamples(8, 0, 60351);
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FooSamples.addBodySamples(10, 0, 605);
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// Add inline instance with name "_Z3gooi".
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StringRef GooName("_Z3gooi");
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auto &GooSamples =
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FooSamples.functionSamplesAt(LineLocation(7, 0))[GooName.str()];
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GooSamples.setName(GooName);
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GooSamples.addTotalSamples(502);
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GooSamples.addBodySamples(3, 0, 502);
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// Add inline instance with name "_Z3hooi".
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StringRef HooName("_Z3hooi");
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auto &HooSamples =
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GooSamples.functionSamplesAt(LineLocation(9, 0))[HooName.str()];
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HooSamples.setName(HooName);
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HooSamples.addTotalSamples(317);
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HooSamples.addBodySamples(4, 0, 317);
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StringRef BarName("_Z3bari");
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FunctionSamples BarSamples;
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BarSamples.setName(BarName);
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BarSamples.addTotalSamples(20301);
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BarSamples.addHeadSamples(1437);
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BarSamples.addBodySamples(1, 0, 1437);
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// Test how reader/writer handles unmangled names.
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StringRef MconstructName("_M_construct<char *>");
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StringRef StringviewName("string_view<std::allocator<char> >");
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BarSamples.addCalledTargetSamples(1, 0, MconstructName, 1000);
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BarSamples.addCalledTargetSamples(1, 0, StringviewName, 437);
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StringRef BazName("_Z3bazi");
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FunctionSamples BazSamples;
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BazSamples.setName(BazName);
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BazSamples.addTotalSamples(12557);
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BazSamples.addHeadSamples(1257);
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BazSamples.addBodySamples(1, 0, 12557);
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StringRef BooName("_Z3booi");
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FunctionSamples BooSamples;
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BooSamples.setName(BooName);
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BooSamples.addTotalSamples(1232);
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BooSamples.addHeadSamples(1);
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BooSamples.addBodySamples(1, 0, 1232);
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SampleProfileMap Profiles;
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Profiles[FooName] = std::move(FooSamples);
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Profiles[BarName] = std::move(BarSamples);
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Profiles[BazName] = std::move(BazSamples);
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Profiles[BooName] = std::move(BooSamples);
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Module M("my_module", Context);
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FunctionType *fn_type =
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FunctionType::get(Type::getVoidTy(Context), {}, false);
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TempFile RemapFile(createRemapFile());
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if (Remap) {
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FooName = "_Z4fauxi";
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BarName = "_Z3barl";
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GooName = "_Z3gool";
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HooName = "_Z3hool";
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}
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M.getOrInsertFunction(FooName, fn_type);
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M.getOrInsertFunction(BarName, fn_type);
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M.getOrInsertFunction(BooName, fn_type);
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ProfileSymbolList List;
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if (Format == SampleProfileFormat::SPF_Ext_Binary) {
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List.add("zoo", true);
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List.add("moo", true);
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}
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Writer->setProfileSymbolList(&List);
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std::error_code EC;
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EC = Writer->write(Profiles);
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ASSERT_TRUE(NoError(EC));
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Writer->getOutputStream().flush();
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readProfile(M, ProfileFile.path(), RemapFile.path());
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EC = Reader->read();
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ASSERT_TRUE(NoError(EC));
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if (Format == SampleProfileFormat::SPF_Ext_Binary) {
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std::unique_ptr<ProfileSymbolList> ReaderList =
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Reader->getProfileSymbolList();
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ReaderList->contains("zoo");
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ReaderList->contains("moo");
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}
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FunctionSamples *ReadFooSamples = Reader->getSamplesFor(FooName);
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ASSERT_TRUE(ReadFooSamples != nullptr);
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if (!UseMD5) {
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ASSERT_EQ("_Z3fooi", ReadFooSamples->getName());
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}
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ASSERT_EQ(7711u, ReadFooSamples->getTotalSamples());
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ASSERT_EQ(610u, ReadFooSamples->getHeadSamples());
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// Try to find a FunctionSamples with GooName at given callsites containing
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// inline instance for GooName. Test the correct FunctionSamples can be
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// found with Remapper support.
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const FunctionSamples *ReadGooSamples =
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ReadFooSamples->findFunctionSamplesAt(LineLocation(7, 0), GooName,
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Reader->getRemapper());
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ASSERT_TRUE(ReadGooSamples != nullptr);
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ASSERT_EQ(502u, ReadGooSamples->getTotalSamples());
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// Try to find a FunctionSamples with GooName at given callsites containing
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// no inline instance for GooName. Test no FunctionSamples will be
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// found with Remapper support.
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const FunctionSamples *ReadGooSamplesAgain =
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ReadFooSamples->findFunctionSamplesAt(LineLocation(9, 0), GooName,
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Reader->getRemapper());
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ASSERT_TRUE(ReadGooSamplesAgain == nullptr);
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// The inline instance of Hoo is inside of the inline instance of Goo.
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// Try to find a FunctionSamples with HooName at given callsites containing
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// inline instance for HooName. Test the correct FunctionSamples can be
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// found with Remapper support.
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const FunctionSamples *ReadHooSamples =
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ReadGooSamples->findFunctionSamplesAt(LineLocation(9, 0), HooName,
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Reader->getRemapper());
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ASSERT_TRUE(ReadHooSamples != nullptr);
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ASSERT_EQ(317u, ReadHooSamples->getTotalSamples());
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FunctionSamples *ReadBarSamples = Reader->getSamplesFor(BarName);
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ASSERT_TRUE(ReadBarSamples != nullptr);
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if (!UseMD5) {
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ASSERT_EQ("_Z3bari", ReadBarSamples->getName());
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}
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ASSERT_EQ(20301u, ReadBarSamples->getTotalSamples());
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ASSERT_EQ(1437u, ReadBarSamples->getHeadSamples());
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ErrorOr<SampleRecord::CallTargetMap> CTMap =
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ReadBarSamples->findCallTargetMapAt(1, 0);
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ASSERT_FALSE(CTMap.getError());
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// Because _Z3bazi is not defined in module M, expect _Z3bazi's profile
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// is not loaded when the profile is ExtBinary or Compact format because
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// these formats support loading function profiles on demand.
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FunctionSamples *ReadBazSamples = Reader->getSamplesFor(BazName);
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if (Format == SampleProfileFormat::SPF_Ext_Binary ||
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Format == SampleProfileFormat::SPF_Compact_Binary) {
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ASSERT_TRUE(ReadBazSamples == nullptr);
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ASSERT_EQ(3u, Reader->getProfiles().size());
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} else {
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ASSERT_TRUE(ReadBazSamples != nullptr);
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ASSERT_EQ(12557u, ReadBazSamples->getTotalSamples());
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ASSERT_EQ(4u, Reader->getProfiles().size());
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}
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FunctionSamples *ReadBooSamples = Reader->getSamplesFor(BooName);
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ASSERT_TRUE(ReadBooSamples != nullptr);
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ASSERT_EQ(1232u, ReadBooSamples->getTotalSamples());
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std::string MconstructGUID;
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StringRef MconstructRep =
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getRepInFormat(MconstructName, UseMD5, MconstructGUID);
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std::string StringviewGUID;
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StringRef StringviewRep =
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getRepInFormat(StringviewName, UseMD5, StringviewGUID);
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ASSERT_EQ(1000u, CTMap.get()[MconstructRep]);
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ASSERT_EQ(437u, CTMap.get()[StringviewRep]);
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ProfileSummary &Summary = Reader->getSummary();
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Summary.setPartialProfile(true);
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verifyProfileSummary(Summary, M, true, false);
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Summary.setPartialProfile(false);
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verifyProfileSummary(Summary, M, true, false);
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verifyProfileSummary(Summary, M, false, false);
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Summary.setPartialProfile(true);
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Summary.setPartialProfileRatio(0.5);
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verifyProfileSummary(Summary, M, true, true);
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}
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void addFunctionSamples(SampleProfileMap *Smap, const char *Fname,
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uint64_t TotalSamples, uint64_t HeadSamples) {
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StringRef Name(Fname);
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FunctionSamples FcnSamples;
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FcnSamples.setName(Name);
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FcnSamples.addTotalSamples(TotalSamples);
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FcnSamples.addHeadSamples(HeadSamples);
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FcnSamples.addBodySamples(1, 0, HeadSamples);
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(*Smap)[Name] = FcnSamples;
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}
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SampleProfileMap setupFcnSamplesForElisionTest(StringRef Policy) {
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SampleProfileMap Smap;
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addFunctionSamples(&Smap, "foo", uint64_t(20301), uint64_t(1437));
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if (Policy == "" || Policy == "all")
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return Smap;
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addFunctionSamples(&Smap, "foo.bar", uint64_t(20303), uint64_t(1439));
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if (Policy == "selected")
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return Smap;
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addFunctionSamples(&Smap, "foo.llvm.2465", uint64_t(20305), uint64_t(1441));
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return Smap;
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}
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void createFunctionWithSampleProfileElisionPolicy(Module *M,
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const char *Fname,
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StringRef Policy) {
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FunctionType *FnType =
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FunctionType::get(Type::getVoidTy(Context), {}, false);
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auto Inserted = M->getOrInsertFunction(Fname, FnType);
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auto Fcn = cast<Function>(Inserted.getCallee());
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if (Policy != "")
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Fcn->addFnAttr("sample-profile-suffix-elision-policy", Policy);
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}
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void setupModuleForElisionTest(Module *M, StringRef Policy) {
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createFunctionWithSampleProfileElisionPolicy(M, "foo", Policy);
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createFunctionWithSampleProfileElisionPolicy(M, "foo.bar", Policy);
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createFunctionWithSampleProfileElisionPolicy(M, "foo.llvm.2465", Policy);
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}
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void testSuffixElisionPolicy(SampleProfileFormat Format, StringRef Policy,
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const StringMap<uint64_t> &Expected) {
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TempFile ProfileFile("profile", "", "", /*Unique*/ true);
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Module M("my_module", Context);
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setupModuleForElisionTest(&M, Policy);
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SampleProfileMap ProfMap = setupFcnSamplesForElisionTest(Policy);
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// write profile
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createWriter(Format, ProfileFile.path());
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std::error_code EC;
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EC = Writer->write(ProfMap);
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ASSERT_TRUE(NoError(EC));
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Writer->getOutputStream().flush();
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// read profile
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readProfile(M, ProfileFile.path());
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EC = Reader->read();
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ASSERT_TRUE(NoError(EC));
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for (auto I = Expected.begin(); I != Expected.end(); ++I) {
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uint64_t Esamples = uint64_t(-1);
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FunctionSamples *Samples = Reader->getSamplesFor(I->getKey());
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if (Samples != nullptr)
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Esamples = Samples->getTotalSamples();
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ASSERT_EQ(I->getValue(), Esamples);
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}
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}
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};
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TEST_F(SampleProfTest, roundtrip_text_profile) {
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testRoundTrip(SampleProfileFormat::SPF_Text, false, false);
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}
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TEST_F(SampleProfTest, roundtrip_raw_binary_profile) {
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testRoundTrip(SampleProfileFormat::SPF_Binary, false, false);
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}
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TEST_F(SampleProfTest, roundtrip_compact_binary_profile) {
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testRoundTrip(SampleProfileFormat::SPF_Compact_Binary, false, true);
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}
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TEST_F(SampleProfTest, roundtrip_ext_binary_profile) {
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testRoundTrip(SampleProfileFormat::SPF_Ext_Binary, false, false);
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}
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TEST_F(SampleProfTest, roundtrip_md5_ext_binary_profile) {
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testRoundTrip(SampleProfileFormat::SPF_Ext_Binary, false, true);
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}
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TEST_F(SampleProfTest, remap_text_profile) {
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testRoundTrip(SampleProfileFormat::SPF_Text, true, false);
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}
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TEST_F(SampleProfTest, remap_raw_binary_profile) {
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testRoundTrip(SampleProfileFormat::SPF_Binary, true, false);
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}
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TEST_F(SampleProfTest, remap_ext_binary_profile) {
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testRoundTrip(SampleProfileFormat::SPF_Ext_Binary, true, false);
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}
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TEST_F(SampleProfTest, sample_overflow_saturation) {
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const uint64_t Max = std::numeric_limits<uint64_t>::max();
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sampleprof_error Result;
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FunctionSamples FooSamples;
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Result = FooSamples.addTotalSamples(1);
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ASSERT_EQ(Result, sampleprof_error::success);
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Result = FooSamples.addHeadSamples(1);
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ASSERT_EQ(Result, sampleprof_error::success);
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Result = FooSamples.addBodySamples(10, 0, 1);
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ASSERT_EQ(Result, sampleprof_error::success);
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Result = FooSamples.addTotalSamples(Max);
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ASSERT_EQ(Result, sampleprof_error::counter_overflow);
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ASSERT_EQ(FooSamples.getTotalSamples(), Max);
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Result = FooSamples.addHeadSamples(Max);
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ASSERT_EQ(Result, sampleprof_error::counter_overflow);
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ASSERT_EQ(FooSamples.getHeadSamples(), Max);
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Result = FooSamples.addBodySamples(10, 0, Max);
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ASSERT_EQ(Result, sampleprof_error::counter_overflow);
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ErrorOr<uint64_t> BodySamples = FooSamples.findSamplesAt(10, 0);
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ASSERT_FALSE(BodySamples.getError());
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ASSERT_EQ(BodySamples.get(), Max);
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}
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TEST_F(SampleProfTest, default_suffix_elision_text) {
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// Default suffix elision policy: strip everything after first dot.
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// This implies that all suffix variants will map to "foo", so
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// we don't expect to see any entries for them in the sample
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// profile.
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StringMap<uint64_t> Expected;
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Expected["foo"] = uint64_t(20301);
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Expected["foo.bar"] = uint64_t(-1);
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Expected["foo.llvm.2465"] = uint64_t(-1);
|
|
testSuffixElisionPolicy(SampleProfileFormat::SPF_Text, "", Expected);
|
|
}
|
|
|
|
TEST_F(SampleProfTest, default_suffix_elision_compact_binary) {
|
|
// Default suffix elision policy: strip everything after first dot.
|
|
// This implies that all suffix variants will map to "foo", so
|
|
// we don't expect to see any entries for them in the sample
|
|
// profile.
|
|
StringMap<uint64_t> Expected;
|
|
Expected["foo"] = uint64_t(20301);
|
|
Expected["foo.bar"] = uint64_t(-1);
|
|
Expected["foo.llvm.2465"] = uint64_t(-1);
|
|
testSuffixElisionPolicy(SampleProfileFormat::SPF_Compact_Binary, "",
|
|
Expected);
|
|
}
|
|
|
|
TEST_F(SampleProfTest, selected_suffix_elision_text) {
|
|
// Profile is created and searched using the "selected"
|
|
// suffix elision policy: we only strip a .XXX suffix if
|
|
// it matches a pattern known to be generated by the compiler
|
|
// (e.g. ".llvm.<digits>").
|
|
StringMap<uint64_t> Expected;
|
|
Expected["foo"] = uint64_t(20301);
|
|
Expected["foo.bar"] = uint64_t(20303);
|
|
Expected["foo.llvm.2465"] = uint64_t(-1);
|
|
testSuffixElisionPolicy(SampleProfileFormat::SPF_Text, "selected", Expected);
|
|
}
|
|
|
|
TEST_F(SampleProfTest, selected_suffix_elision_compact_binary) {
|
|
// Profile is created and searched using the "selected"
|
|
// suffix elision policy: we only strip a .XXX suffix if
|
|
// it matches a pattern known to be generated by the compiler
|
|
// (e.g. ".llvm.<digits>").
|
|
StringMap<uint64_t> Expected;
|
|
Expected["foo"] = uint64_t(20301);
|
|
Expected["foo.bar"] = uint64_t(20303);
|
|
Expected["foo.llvm.2465"] = uint64_t(-1);
|
|
testSuffixElisionPolicy(SampleProfileFormat::SPF_Compact_Binary, "selected",
|
|
Expected);
|
|
}
|
|
|
|
TEST_F(SampleProfTest, none_suffix_elision_text) {
|
|
// Profile is created and searched using the "none"
|
|
// suffix elision policy: no stripping of suffixes at all.
|
|
// Here we expect to see all variants in the profile.
|
|
StringMap<uint64_t> Expected;
|
|
Expected["foo"] = uint64_t(20301);
|
|
Expected["foo.bar"] = uint64_t(20303);
|
|
Expected["foo.llvm.2465"] = uint64_t(20305);
|
|
testSuffixElisionPolicy(SampleProfileFormat::SPF_Text, "none", Expected);
|
|
}
|
|
|
|
TEST_F(SampleProfTest, none_suffix_elision_compact_binary) {
|
|
// Profile is created and searched using the "none"
|
|
// suffix elision policy: no stripping of suffixes at all.
|
|
// Here we expect to see all variants in the profile.
|
|
StringMap<uint64_t> Expected;
|
|
Expected["foo"] = uint64_t(20301);
|
|
Expected["foo.bar"] = uint64_t(20303);
|
|
Expected["foo.llvm.2465"] = uint64_t(20305);
|
|
testSuffixElisionPolicy(SampleProfileFormat::SPF_Compact_Binary, "none",
|
|
Expected);
|
|
}
|
|
|
|
} // end anonymous namespace
|