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//===- unittest/ProfileData/SampleProfTest.cpp ------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ProfileData/SampleProf.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/ProfileData/SampleProfReader.h"
#include "llvm/ProfileData/SampleProfWriter.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "gtest/gtest.h"
#include <string>
#include <vector>
using namespace llvm;
using namespace sampleprof;
static ::testing::AssertionResult NoError(std::error_code EC) {
if (!EC)
return ::testing::AssertionSuccess();
return ::testing::AssertionFailure() << "error " << EC.value() << ": "
<< EC.message();
}
namespace {
struct SampleProfTest : ::testing::Test {
LLVMContext Context;
std::unique_ptr<SampleProfileWriter> Writer;
std::unique_ptr<SampleProfileReader> Reader;
SampleProfTest() : Writer(), Reader() {}
void createWriter(SampleProfileFormat Format, StringRef Profile) {
std::error_code EC;
std::unique_ptr<raw_ostream> OS(
new raw_fd_ostream(Profile, EC, sys::fs::F_None));
auto WriterOrErr = SampleProfileWriter::create(OS, Format);
ASSERT_TRUE(NoError(WriterOrErr.getError()));
Writer = std::move(WriterOrErr.get());
}
void readProfile(const Module &M, StringRef Profile) {
auto ReaderOrErr = SampleProfileReader::create(Profile, Context);
ASSERT_TRUE(NoError(ReaderOrErr.getError()));
Reader = std::move(ReaderOrErr.get());
Reader->collectFuncsToUse(M);
}
void testRoundTrip(SampleProfileFormat Format, bool Remap) {
SmallVector<char, 128> ProfilePath;
ASSERT_TRUE(NoError(llvm::sys::fs::createTemporaryFile("profile", "", ProfilePath)));
StringRef Profile(ProfilePath.data(), ProfilePath.size());
createWriter(Format, Profile);
StringRef FooName("_Z3fooi");
FunctionSamples FooSamples;
FooSamples.setName(FooName);
FooSamples.addTotalSamples(7711);
FooSamples.addHeadSamples(610);
FooSamples.addBodySamples(1, 0, 610);
FooSamples.addBodySamples(2, 0, 600);
FooSamples.addBodySamples(4, 0, 60000);
FooSamples.addBodySamples(8, 0, 60351);
FooSamples.addBodySamples(10, 0, 605);
StringRef BarName("_Z3bari");
FunctionSamples BarSamples;
BarSamples.setName(BarName);
BarSamples.addTotalSamples(20301);
BarSamples.addHeadSamples(1437);
BarSamples.addBodySamples(1, 0, 1437);
// Test how reader/writer handles unmangled names.
StringRef MconstructName("_M_construct<char *>");
StringRef StringviewName("string_view<std::allocator<char> >");
BarSamples.addCalledTargetSamples(1, 0, MconstructName, 1000);
BarSamples.addCalledTargetSamples(1, 0, StringviewName, 437);
Module M("my_module", Context);
FunctionType *fn_type =
FunctionType::get(Type::getVoidTy(Context), {}, false);
M.getOrInsertFunction(FooName, fn_type);
M.getOrInsertFunction(BarName, fn_type);
StringMap<FunctionSamples> Profiles;
Profiles[FooName] = std::move(FooSamples);
Profiles[BarName] = std::move(BarSamples);
std::error_code EC;
EC = Writer->write(Profiles);
ASSERT_TRUE(NoError(EC));
Writer->getOutputStream().flush();
readProfile(M, Profile);
EC = Reader->read();
ASSERT_TRUE(NoError(EC));
if (Remap) {
auto MemBuffer = llvm::MemoryBuffer::getMemBuffer(R"(
# Types 'int' and 'long' are equivalent
type i l
# Function names 'foo' and 'faux' are equivalent
name 3foo 4faux
)");
Reader.reset(new SampleProfileReaderItaniumRemapper(
std::move(MemBuffer), Context, std::move(Reader)));
FooName = "_Z4fauxi";
BarName = "_Z3barl";
EC = Reader->read();
ASSERT_TRUE(NoError(EC));
}
ASSERT_EQ(2u, Reader->getProfiles().size());
FunctionSamples *ReadFooSamples = Reader->getSamplesFor(FooName);
ASSERT_TRUE(ReadFooSamples != nullptr);
if (Format != SampleProfileFormat::SPF_Compact_Binary) {
ASSERT_EQ("_Z3fooi", ReadFooSamples->getName());
}
ASSERT_EQ(7711u, ReadFooSamples->getTotalSamples());
ASSERT_EQ(610u, ReadFooSamples->getHeadSamples());
FunctionSamples *ReadBarSamples = Reader->getSamplesFor(BarName);
ASSERT_TRUE(ReadBarSamples != nullptr);
if (Format != SampleProfileFormat::SPF_Compact_Binary) {
ASSERT_EQ("_Z3bari", ReadBarSamples->getName());
}
ASSERT_EQ(20301u, ReadBarSamples->getTotalSamples());
ASSERT_EQ(1437u, ReadBarSamples->getHeadSamples());
ErrorOr<SampleRecord::CallTargetMap> CTMap =
ReadBarSamples->findCallTargetMapAt(1, 0);
ASSERT_FALSE(CTMap.getError());
std::string MconstructGUID;
StringRef MconstructRep =
getRepInFormat(MconstructName, Format, MconstructGUID);
std::string StringviewGUID;
StringRef StringviewRep =
getRepInFormat(StringviewName, Format, StringviewGUID);
ASSERT_EQ(1000u, CTMap.get()[MconstructRep]);
ASSERT_EQ(437u, CTMap.get()[StringviewRep]);
auto VerifySummary = [](ProfileSummary &Summary) mutable {
ASSERT_EQ(ProfileSummary::PSK_Sample, Summary.getKind());
ASSERT_EQ(123603u, Summary.getTotalCount());
ASSERT_EQ(6u, Summary.getNumCounts());
ASSERT_EQ(2u, Summary.getNumFunctions());
ASSERT_EQ(1437u, Summary.getMaxFunctionCount());
ASSERT_EQ(60351u, Summary.getMaxCount());
uint32_t Cutoff = 800000;
auto Predicate = [&Cutoff](const ProfileSummaryEntry &PE) {
return PE.Cutoff == Cutoff;
};
std::vector<ProfileSummaryEntry> &Details = Summary.getDetailedSummary();
auto EightyPerc = find_if(Details, Predicate);
Cutoff = 900000;
auto NinetyPerc = find_if(Details, Predicate);
Cutoff = 950000;
auto NinetyFivePerc = find_if(Details, Predicate);
Cutoff = 990000;
auto NinetyNinePerc = find_if(Details, Predicate);
ASSERT_EQ(60000u, EightyPerc->MinCount);
ASSERT_EQ(60000u, NinetyPerc->MinCount);
ASSERT_EQ(60000u, NinetyFivePerc->MinCount);
ASSERT_EQ(610u, NinetyNinePerc->MinCount);
};
ProfileSummary &Summary = Reader->getSummary();
VerifySummary(Summary);
// Test that conversion of summary to and from Metadata works.
Metadata *MD = Summary.getMD(Context);
ASSERT_TRUE(MD);
ProfileSummary *PS = ProfileSummary::getFromMD(MD);
ASSERT_TRUE(PS);
VerifySummary(*PS);
delete PS;
// Test that summary can be attached to and read back from module.
M.setProfileSummary(MD);
MD = M.getProfileSummary();
ASSERT_TRUE(MD);
PS = ProfileSummary::getFromMD(MD);
ASSERT_TRUE(PS);
VerifySummary(*PS);
delete PS;
}
};
TEST_F(SampleProfTest, roundtrip_text_profile) {
testRoundTrip(SampleProfileFormat::SPF_Text, false);
}
TEST_F(SampleProfTest, roundtrip_raw_binary_profile) {
testRoundTrip(SampleProfileFormat::SPF_Binary, false);
}
TEST_F(SampleProfTest, roundtrip_compact_binary_profile) {
testRoundTrip(SampleProfileFormat::SPF_Compact_Binary, false);
}
TEST_F(SampleProfTest, remap_text_profile) {
testRoundTrip(SampleProfileFormat::SPF_Text, true);
}
TEST_F(SampleProfTest, remap_raw_binary_profile) {
testRoundTrip(SampleProfileFormat::SPF_Binary, true);
}
TEST_F(SampleProfTest, sample_overflow_saturation) {
const uint64_t Max = std::numeric_limits<uint64_t>::max();
sampleprof_error Result;
StringRef FooName("_Z3fooi");
FunctionSamples FooSamples;
Result = FooSamples.addTotalSamples(1);
ASSERT_EQ(Result, sampleprof_error::success);
Result = FooSamples.addHeadSamples(1);
ASSERT_EQ(Result, sampleprof_error::success);
Result = FooSamples.addBodySamples(10, 0, 1);
ASSERT_EQ(Result, sampleprof_error::success);
Result = FooSamples.addTotalSamples(Max);
ASSERT_EQ(Result, sampleprof_error::counter_overflow);
ASSERT_EQ(FooSamples.getTotalSamples(), Max);
Result = FooSamples.addHeadSamples(Max);
ASSERT_EQ(Result, sampleprof_error::counter_overflow);
ASSERT_EQ(FooSamples.getHeadSamples(), Max);
Result = FooSamples.addBodySamples(10, 0, Max);
ASSERT_EQ(Result, sampleprof_error::counter_overflow);
ErrorOr<uint64_t> BodySamples = FooSamples.findSamplesAt(10, 0);
ASSERT_FALSE(BodySamples.getError());
ASSERT_EQ(BodySamples.get(), Max);
}
} // end anonymous namespace