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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <stdio.h>
#include "art_method-inl.h"
#include "base/unix_file/fd_file.h"
#include "class_linker-inl.h"
#include "common_runtime_test.h"
#include "dex/dex_file.h"
#include "dex/dex_file_loader.h"
#include "dex/method_reference.h"
#include "dex/type_reference.h"
#include "handle_scope-inl.h"
#include "linear_alloc.h"
#include "mirror/class-inl.h"
#include "mirror/class_loader.h"
#include "profile/profile_compilation_info.h"
#include "scoped_thread_state_change-inl.h"
namespace art {
using Hotness = ProfileCompilationInfo::MethodHotness;
class ProfileCompilationInfoTest : public CommonRuntimeTest {
public:
void PostRuntimeCreate() override {
allocator_.reset(new ArenaAllocator(Runtime::Current()->GetArenaPool()));
}
protected:
std::vector<ArtMethod*> GetVirtualMethods(jobject class_loader,
const std::string& clazz) {
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
Thread* self = Thread::Current();
ScopedObjectAccess soa(self);
StackHandleScope<1> hs(self);
Handle<mirror::ClassLoader> h_loader(
hs.NewHandle(self->DecodeJObject(class_loader)->AsClassLoader()));
ObjPtr<mirror::Class> klass = class_linker->FindClass(self, clazz.c_str(), h_loader);
const auto pointer_size = class_linker->GetImagePointerSize();
std::vector<ArtMethod*> methods;
for (auto& m : klass->GetVirtualMethods(pointer_size)) {
methods.push_back(&m);
}
return methods;
}
uint32_t GetFd(const ScratchFile& file) {
return static_cast<uint32_t>(file.GetFd());
}
bool SaveProfilingInfo(
const std::string& filename,
const std::vector<ArtMethod*>& methods,
Hotness::Flag flags) {
ProfileCompilationInfo info;
std::vector<ProfileMethodInfo> profile_methods;
ScopedObjectAccess soa(Thread::Current());
for (ArtMethod* method : methods) {
profile_methods.emplace_back(
MethodReference(method->GetDexFile(), method->GetDexMethodIndex()));
}
if (!info.AddMethods(profile_methods, flags)) {
return false;
}
if (info.GetNumberOfMethods() != profile_methods.size()) {
return false;
}
ProfileCompilationInfo file_profile;
if (!file_profile.Load(filename, false)) {
return false;
}
if (!info.MergeWith(file_profile)) {
return false;
}
return info.Save(filename, nullptr);
}
// Saves the given art methods to a profile backed by 'filename' and adds
// some fake inline caches to it. The added inline caches are returned in
// the out map `profile_methods_map`.
bool SaveProfilingInfoWithFakeInlineCaches(
const std::string& filename,
const std::vector<ArtMethod*>& methods,
Hotness::Flag flags,
/*out*/ SafeMap<ArtMethod*, ProfileMethodInfo>* profile_methods_map) {
ProfileCompilationInfo info;
std::vector<ProfileMethodInfo> profile_methods;
ScopedObjectAccess soa(Thread::Current());
for (ArtMethod* method : methods) {
std::vector<ProfileMethodInfo::ProfileInlineCache> caches;
// Monomorphic
for (uint16_t dex_pc = 0; dex_pc < 11; dex_pc++) {
std::vector<TypeReference> classes;
classes.emplace_back(method->GetDexFile(), dex::TypeIndex(0));
caches.emplace_back(dex_pc, /*is_missing_types*/false, classes);
}
// Polymorphic
for (uint16_t dex_pc = 11; dex_pc < 22; dex_pc++) {
std::vector<TypeReference> classes;
for (uint16_t k = 0; k < InlineCache::kIndividualCacheSize / 2; k++) {
classes.emplace_back(method->GetDexFile(), dex::TypeIndex(k));
}
caches.emplace_back(dex_pc, /*is_missing_types*/false, classes);
}
// Megamorphic
for (uint16_t dex_pc = 22; dex_pc < 33; dex_pc++) {
std::vector<TypeReference> classes;
for (uint16_t k = 0; k < 2 * InlineCache::kIndividualCacheSize; k++) {
classes.emplace_back(method->GetDexFile(), dex::TypeIndex(k));
}
caches.emplace_back(dex_pc, /*is_missing_types*/false, classes);
}
// Missing types
for (uint16_t dex_pc = 33; dex_pc < 44; dex_pc++) {
std::vector<TypeReference> classes;
caches.emplace_back(dex_pc, /*is_missing_types*/true, classes);
}
ProfileMethodInfo pmi(MethodReference(method->GetDexFile(),
method->GetDexMethodIndex()),
caches);
profile_methods.push_back(pmi);
profile_methods_map->Put(method, pmi);
}
if (!info.AddMethods(profile_methods, flags)
|| info.GetNumberOfMethods() != profile_methods.size()) {
return false;
}
return info.Save(filename, nullptr);
}
// Creates an inline cache which will be destructed at the end of the test.
ProfileCompilationInfo::InlineCacheMap* CreateInlineCacheMap() {
used_inline_caches.emplace_back(new ProfileCompilationInfo::InlineCacheMap(
std::less<uint16_t>(), allocator_->Adapter(kArenaAllocProfile)));
return used_inline_caches.back().get();
}
ProfileCompilationInfo::OfflineProfileMethodInfo ConvertProfileMethodInfo(
const ProfileMethodInfo& pmi) {
ProfileCompilationInfo::InlineCacheMap* ic_map = CreateInlineCacheMap();
ProfileCompilationInfo::OfflineProfileMethodInfo offline_pmi(ic_map);
SafeMap<DexFile*, uint8_t> dex_map; // dex files to profile index
for (const auto& inline_cache : pmi.inline_caches) {
ProfileCompilationInfo::DexPcData& dex_pc_data =
ic_map->FindOrAdd(
inline_cache.dex_pc, ProfileCompilationInfo::DexPcData(allocator_.get()))->second;
if (inline_cache.is_missing_types) {
dex_pc_data.SetIsMissingTypes();
}
for (const auto& class_ref : inline_cache.classes) {
uint8_t dex_profile_index = dex_map.FindOrAdd(const_cast<DexFile*>(class_ref.dex_file),
static_cast<uint8_t>(dex_map.size()))->second;
dex_pc_data.AddClass(dex_profile_index, class_ref.TypeIndex());
if (dex_profile_index >= offline_pmi.dex_references.size()) {
// This is a new dex.
const std::string& location = class_ref.dex_file->GetLocation();
std::string dex_key = ProfileCompilationInfo::GetProfileDexFileBaseKey(location);
// The `dex_key` is a temporary that shall cease to exist soon. Create a view
// using the dex file's location as the backing data.
CHECK(EndsWith(location, dex_key));
size_t dex_key_start = location.size() - dex_key.size();
std::string_view dex_key_view(location.data() + dex_key_start, dex_key.size());
offline_pmi.dex_references.emplace_back(dex_key_view,
class_ref.dex_file->GetLocationChecksum(),
class_ref.dex_file->NumMethodIds());
}
}
}
return offline_pmi;
}
// Cannot sizeof the actual arrays so hard code the values here.
// They should not change anyway.
static constexpr int kProfileMagicSize = 4;
static constexpr int kProfileVersionSize = 4;
std::unique_ptr<ArenaAllocator> allocator_;
// Cache of inline caches generated during tests.
// This makes it easier to pass data between different utilities and ensure that
// caches are destructed at the end of the test.
std::vector<std::unique_ptr<ProfileCompilationInfo::InlineCacheMap>> used_inline_caches;
};
TEST_F(ProfileCompilationInfoTest, SaveArtMethods) {
ScratchFile profile;
Thread* self = Thread::Current();
jobject class_loader;
{
ScopedObjectAccess soa(self);
class_loader = LoadDex("ProfileTestMultiDex");
}
ASSERT_NE(class_loader, nullptr);
// Save virtual methods from Main.
std::vector<ArtMethod*> main_methods = GetVirtualMethods(class_loader, "LMain;");
ASSERT_TRUE(SaveProfilingInfo(
profile.GetFilename(),
main_methods,
static_cast<Hotness::Flag>(Hotness::kFlagHot | Hotness::kFlagPostStartup)));
// Check that what we saved is in the profile.
ProfileCompilationInfo info1;
ASSERT_TRUE(info1.Load(GetFd(profile)));
ASSERT_EQ(info1.GetNumberOfMethods(), main_methods.size());
{
ScopedObjectAccess soa(self);
for (ArtMethod* m : main_methods) {
Hotness h = info1.GetMethodHotness(MethodReference(m->GetDexFile(), m->GetDexMethodIndex()));
ASSERT_TRUE(h.IsHot());
ASSERT_TRUE(h.IsPostStartup());
}
}
// Save virtual methods from Second.
std::vector<ArtMethod*> second_methods = GetVirtualMethods(class_loader, "LSecond;");
ASSERT_TRUE(SaveProfilingInfo(
profile.GetFilename(),
second_methods,
static_cast<Hotness::Flag>(Hotness::kFlagHot | Hotness::kFlagStartup)));
// Check that what we saved is in the profile (methods form Main and Second).
ProfileCompilationInfo info2;
ASSERT_TRUE(profile.GetFile()->ResetOffset());
ASSERT_TRUE(info2.Load(GetFd(profile)));
ASSERT_EQ(info2.GetNumberOfMethods(), main_methods.size() + second_methods.size());
{
ScopedObjectAccess soa(self);
for (ArtMethod* m : main_methods) {
Hotness h = info2.GetMethodHotness(MethodReference(m->GetDexFile(), m->GetDexMethodIndex()));
ASSERT_TRUE(h.IsHot());
ASSERT_TRUE(h.IsPostStartup());
}
for (ArtMethod* m : second_methods) {
Hotness h = info2.GetMethodHotness(MethodReference(m->GetDexFile(), m->GetDexMethodIndex()));
ASSERT_TRUE(h.IsHot());
ASSERT_TRUE(h.IsStartup());
}
}
}
TEST_F(ProfileCompilationInfoTest, SaveArtMethodsWithInlineCaches) {
ScratchFile profile;
Thread* self = Thread::Current();
jobject class_loader;
{
ScopedObjectAccess soa(self);
class_loader = LoadDex("ProfileTestMultiDex");
}
ASSERT_NE(class_loader, nullptr);
// Save virtual methods from Main.
std::vector<ArtMethod*> main_methods = GetVirtualMethods(class_loader, "LMain;");
SafeMap<ArtMethod*, ProfileMethodInfo> profile_methods_map;
ASSERT_TRUE(SaveProfilingInfoWithFakeInlineCaches(
profile.GetFilename(),
main_methods,
static_cast<Hotness::Flag>(Hotness::kFlagHot | Hotness::kFlagStartup),
&profile_methods_map));
// Check that what we saved is in the profile.
ProfileCompilationInfo info;
ASSERT_TRUE(info.Load(GetFd(profile)));
ASSERT_EQ(info.GetNumberOfMethods(), main_methods.size());
{
ScopedObjectAccess soa(self);
for (ArtMethod* m : main_methods) {
MethodReference method_ref(m->GetDexFile(), m->GetDexMethodIndex());
Hotness h = info.GetMethodHotness(method_ref);
ASSERT_TRUE(h.IsHot());
ASSERT_TRUE(h.IsStartup());
const ProfileMethodInfo& pmi = profile_methods_map.find(m)->second;
std::unique_ptr<ProfileCompilationInfo::OfflineProfileMethodInfo> offline_pmi =
info.GetHotMethodInfo(method_ref);
ASSERT_TRUE(offline_pmi != nullptr);
ProfileCompilationInfo::OfflineProfileMethodInfo converted_pmi =
ConvertProfileMethodInfo(pmi);
ASSERT_EQ(converted_pmi, *offline_pmi);
}
}
}
} // namespace art