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llvm-project/llvm/unittests/ProfileData/SampleProfTest.cpp

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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/FileSystem.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::OF_None));
auto WriterOrErr = SampleProfileWriter::create(OS, Format);
ASSERT_TRUE(NoError(WriterOrErr.getError()));
Writer = std::move(WriterOrErr.get());
}
void readProfile(const Module &M, StringRef Profile,
StringRef RemapFile = "") {
auto ReaderOrErr = SampleProfileReader::create(
std::string(Profile), Context, std::string(RemapFile));
ASSERT_TRUE(NoError(ReaderOrErr.getError()));
Reader = std::move(ReaderOrErr.get());
Reader->collectFuncsFrom(M);
}
void createRemapFile(SmallVectorImpl<char> &RemapPath, StringRef &RemapFile) {
std::error_code EC =
llvm::sys::fs::createTemporaryFile("remapfile", "", RemapPath);
ASSERT_TRUE(NoError(EC));
RemapFile = StringRef(RemapPath.data(), RemapPath.size());
std::unique_ptr<raw_fd_ostream> OS(
new raw_fd_ostream(RemapFile, EC, sys::fs::OF_None));
*OS << R"(
# Types 'int' and 'long' are equivalent
type i l
# Function names 'foo' and 'faux' are equivalent
name 3foo 4faux
)";
OS->close();
}
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);
StringRef BazName("_Z3bazi");
FunctionSamples BazSamples;
BazSamples.setName(BazName);
BazSamples.addTotalSamples(12557);
BazSamples.addHeadSamples(1257);
BazSamples.addBodySamples(1, 0, 12557);
StringRef BooName("_Z3booi");
FunctionSamples BooSamples;
BooSamples.setName(BooName);
BooSamples.addTotalSamples(1232);
BooSamples.addHeadSamples(1);
BooSamples.addBodySamples(1, 0, 1232);
StringMap<FunctionSamples> Profiles;
Profiles[FooName] = std::move(FooSamples);
Profiles[BarName] = std::move(BarSamples);
Profiles[BazName] = std::move(BazSamples);
Profiles[BooName] = std::move(BooSamples);
Module M("my_module", Context);
FunctionType *fn_type =
FunctionType::get(Type::getVoidTy(Context), {}, false);
SmallVector<char, 128> RemapPath;
StringRef RemapFile;
if (Remap) {
createRemapFile(RemapPath, RemapFile);
FooName = "_Z4fauxi";
BarName = "_Z3barl";
}
M.getOrInsertFunction(FooName, fn_type);
M.getOrInsertFunction(BarName, fn_type);
M.getOrInsertFunction(BooName, fn_type);
ProfileSymbolList List;
if (Format == SampleProfileFormat::SPF_Ext_Binary) {
List.add("zoo", true);
List.add("moo", true);
}
Writer->setProfileSymbolList(&List);
std::error_code EC;
EC = Writer->write(Profiles);
ASSERT_TRUE(NoError(EC));
Writer->getOutputStream().flush();
readProfile(M, Profile, RemapFile);
EC = Reader->read();
ASSERT_TRUE(NoError(EC));
if (Format == SampleProfileFormat::SPF_Ext_Binary) {
std::unique_ptr<ProfileSymbolList> ReaderList =
Reader->getProfileSymbolList();
ReaderList->contains("zoo");
ReaderList->contains("moo");
}
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());
// Because _Z3bazi is not defined in module M, expect _Z3bazi's profile
// is not loaded when the profile is ExtBinary or Compact format because
// these formats support loading function profiles on demand.
FunctionSamples *ReadBazSamples = Reader->getSamplesFor(BazName);
if (Format == SampleProfileFormat::SPF_Ext_Binary ||
Format == SampleProfileFormat::SPF_Compact_Binary) {
ASSERT_TRUE(ReadBazSamples == nullptr);
ASSERT_EQ(3u, Reader->getProfiles().size());
} else {
ASSERT_TRUE(ReadBazSamples != nullptr);
ASSERT_EQ(12557u, ReadBazSamples->getTotalSamples());
ASSERT_EQ(4u, Reader->getProfiles().size());
}
FunctionSamples *ReadBooSamples = Reader->getSamplesFor(BooName);
ASSERT_TRUE(ReadBooSamples != nullptr);
ASSERT_EQ(1232u, ReadBooSamples->getTotalSamples());
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(137392u, Summary.getTotalCount());
ASSERT_EQ(8u, Summary.getNumCounts());
ASSERT_EQ(4u, 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(12557u, NinetyPerc->MinCount);
ASSERT_EQ(12557u, 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, ProfileSummary::PSK_Sample);
MD = M.getProfileSummary(/* IsCS */ false);
ASSERT_TRUE(MD);
PS = ProfileSummary::getFromMD(MD);
ASSERT_TRUE(PS);
VerifySummary(*PS);
delete PS;
}
void addFunctionSamples(StringMap<FunctionSamples> *Smap, const char *Fname,
uint64_t TotalSamples, uint64_t HeadSamples) {
StringRef Name(Fname);
FunctionSamples FcnSamples;
FcnSamples.setName(Name);
FcnSamples.addTotalSamples(TotalSamples);
FcnSamples.addHeadSamples(HeadSamples);
FcnSamples.addBodySamples(1, 0, HeadSamples);
(*Smap)[Name] = FcnSamples;
}
StringMap<FunctionSamples> setupFcnSamplesForElisionTest(StringRef Policy) {
StringMap<FunctionSamples> Smap;
addFunctionSamples(&Smap, "foo", uint64_t(20301), uint64_t(1437));
if (Policy == "" || Policy == "all")
return Smap;
addFunctionSamples(&Smap, "foo.bar", uint64_t(20303), uint64_t(1439));
if (Policy == "selected")
return Smap;
addFunctionSamples(&Smap, "foo.llvm.2465", uint64_t(20305), uint64_t(1441));
return Smap;
}
void createFunctionWithSampleProfileElisionPolicy(Module *M,
const char *Fname,
StringRef Policy) {
FunctionType *FnType =
FunctionType::get(Type::getVoidTy(Context), {}, false);
auto Inserted = M->getOrInsertFunction(Fname, FnType);
auto Fcn = cast<Function>(Inserted.getCallee());
if (Policy != "")
Fcn->addFnAttr("sample-profile-suffix-elision-policy", Policy);
}
void setupModuleForElisionTest(Module *M, StringRef Policy) {
createFunctionWithSampleProfileElisionPolicy(M, "foo", Policy);
createFunctionWithSampleProfileElisionPolicy(M, "foo.bar", Policy);
createFunctionWithSampleProfileElisionPolicy(M, "foo.llvm.2465", Policy);
}
void testSuffixElisionPolicy(SampleProfileFormat Format, StringRef Policy,
const StringMap<uint64_t> &Expected) {
SmallVector<char, 128> ProfilePath;
std::error_code EC;
EC = llvm::sys::fs::createTemporaryFile("profile", "", ProfilePath);
ASSERT_TRUE(NoError(EC));
StringRef ProfileFile(ProfilePath.data(), ProfilePath.size());
Module M("my_module", Context);
setupModuleForElisionTest(&M, Policy);
StringMap<FunctionSamples> ProfMap = setupFcnSamplesForElisionTest(Policy);
// write profile
createWriter(Format, ProfileFile);
EC = Writer->write(ProfMap);
ASSERT_TRUE(NoError(EC));
Writer->getOutputStream().flush();
// read profile
readProfile(M, ProfileFile);
EC = Reader->read();
ASSERT_TRUE(NoError(EC));
for (auto I = Expected.begin(); I != Expected.end(); ++I) {
uint64_t Esamples = uint64_t(-1);
FunctionSamples *Samples = Reader->getSamplesFor(I->getKey());
if (Samples != nullptr)
Esamples = Samples->getTotalSamples();
ASSERT_EQ(I->getValue(), Esamples);
}
}
};
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, roundtrip_ext_binary_profile) {
testRoundTrip(SampleProfileFormat::SPF_Ext_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, remap_ext_binary_profile) {
testRoundTrip(SampleProfileFormat::SPF_Ext_Binary, true);
}
TEST_F(SampleProfTest, sample_overflow_saturation) {
const uint64_t Max = std::numeric_limits<uint64_t>::max();
sampleprof_error Result;
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);
}
TEST_F(SampleProfTest, default_suffix_elision_text) {
// 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_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
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