runtime/jit/profile_compilation_info_test.cc - LeafOS-Project/android_art - Gitiles

 /*
  * 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 "base/unix_file/fd_file.h"
 #include "art_method-inl.h"
 #include "class_linker-inl.h"
 #include "common_runtime_test.h"
 #include "dex_file.h"
 #include "method_reference.h"
 #include "mirror/class-inl.h"
 #include "mirror/class_loader.h"
 #include "handle_scope-inl.h"
 #include "jit/offline_profiling_info.h"
 #include "scoped_thread_state_change.h"

 namespace art {

 class ProfileCompilationInfoTest : public CommonRuntimeTest {
  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(
         reinterpret_cast<mirror::ClassLoader*>(self->DecodeJObject(class_loader))));
     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;
   }

   bool AddMethod(const std::string& dex_location,
                  uint32_t checksum,
                  uint16_t method_index,
                  ProfileCompilationInfo* info) {
     return info->AddMethodIndex(dex_location, checksum, method_index);
   }

   bool AddClass(const std::string& dex_location,
                 uint32_t checksum,
                 uint16_t class_index,
                 ProfileCompilationInfo* info) {
     return info->AddMethodIndex(dex_location, checksum, class_index);
   }

   uint32_t GetFd(const ScratchFile& file) {
     return static_cast<uint32_t>(file.GetFd());
   }

   bool SaveProfilingInfo(
       const std::string& filename,
       const std::vector<ArtMethod*>& methods,
       const std::set<DexCacheResolvedClasses>& resolved_classes) {
     ProfileCompilationInfo info;
     std::vector<MethodReference> method_refs;
     ScopedObjectAccess soa(Thread::Current());
     for (ArtMethod* method : methods) {
       method_refs.emplace_back(method->GetDexFile(), method->GetDexMethodIndex());
     }
     if (!info.AddMethodsAndClasses(method_refs, resolved_classes)) {
       return false;
     }
     return info.MergeAndSave(filename, nullptr, false);
   }

   // Cannot sizeof the actual arrays so hardcode the values here.
   // They should not change anyway.
   static constexpr int kProfileMagicSize = 4;
   static constexpr int kProfileVersionSize = 4;
 };

 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::set<DexCacheResolvedClasses> resolved_classes;
   std::vector<ArtMethod*> main_methods = GetVirtualMethods(class_loader, "LMain;");
   ASSERT_TRUE(SaveProfilingInfo(profile.GetFilename(), main_methods, resolved_classes));

   // 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) {
       ASSERT_TRUE(info1.ContainsMethod(MethodReference(m->GetDexFile(), m->GetDexMethodIndex())));
     }
   }

   // Save virtual methods from Second.
   std::vector<ArtMethod*> second_methods = GetVirtualMethods(class_loader, "LSecond;");
   ASSERT_TRUE(SaveProfilingInfo(profile.GetFilename(), second_methods, resolved_classes));

   // 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) {
       ASSERT_TRUE(info2.ContainsMethod(MethodReference(m->GetDexFile(), m->GetDexMethodIndex())));
     }
     for (ArtMethod* m : second_methods) {
       ASSERT_TRUE(info2.ContainsMethod(MethodReference(m->GetDexFile(), m->GetDexMethodIndex())));
     }
   }
 }

 TEST_F(ProfileCompilationInfoTest, SaveFd) {
   ScratchFile profile;

   ProfileCompilationInfo saved_info;
   // Save a few methods.
   for (uint16_t i = 0; i < 10; i++) {
     ASSERT_TRUE(AddMethod("dex_location1", /* checksum */ 1, /* method_idx */ i, &saved_info));
     ASSERT_TRUE(AddMethod("dex_location2", /* checksum */ 2, /* method_idx */ i, &saved_info));
   }
   ASSERT_TRUE(saved_info.Save(GetFd(profile)));
   ASSERT_EQ(0, profile.GetFile()->Flush());

   // Check that we get back what we saved.
   ProfileCompilationInfo loaded_info;
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_TRUE(loaded_info.Load(GetFd(profile)));
   ASSERT_TRUE(loaded_info.Equals(saved_info));

   // Save more methods.
   for (uint16_t i = 0; i < 100; i++) {
     ASSERT_TRUE(AddMethod("dex_location1", /* checksum */ 1, /* method_idx */ i, &saved_info));
     ASSERT_TRUE(AddMethod("dex_location2", /* checksum */ 2, /* method_idx */ i, &saved_info));
     ASSERT_TRUE(AddMethod("dex_location3", /* checksum */ 3, /* method_idx */ i, &saved_info));
   }
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_TRUE(saved_info.Save(GetFd(profile)));
   ASSERT_EQ(0, profile.GetFile()->Flush());

   // Check that we get back everything we saved.
   ProfileCompilationInfo loaded_info2;
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_TRUE(loaded_info2.Load(GetFd(profile)));
   ASSERT_TRUE(loaded_info2.Equals(saved_info));
 }

 TEST_F(ProfileCompilationInfoTest, AddMethodsAndClassesFail) {
   ScratchFile profile;

   ProfileCompilationInfo info;
   ASSERT_TRUE(AddMethod("dex_location", /* checksum */ 1, /* method_idx */ 1, &info));
   // Trying to add info for an existing file but with a different checksum.
   ASSERT_FALSE(AddMethod("dex_location", /* checksum */ 2, /* method_idx */ 2, &info));
 }

 TEST_F(ProfileCompilationInfoTest, MergeFail) {
   ScratchFile profile;

   ProfileCompilationInfo info1;
   ASSERT_TRUE(AddMethod("dex_location", /* checksum */ 1, /* method_idx */ 1, &info1));
   // Use the same file, change the checksum.
   ProfileCompilationInfo info2;
   ASSERT_TRUE(AddMethod("dex_location", /* checksum */ 2, /* method_idx */ 2, &info2));

   ASSERT_FALSE(info1.MergeWith(info2));
 }

 TEST_F(ProfileCompilationInfoTest, SaveMaxMethods) {
   ScratchFile profile;

   ProfileCompilationInfo saved_info;
   // Save the maximum number of methods
   for (uint16_t i = 0; i < std::numeric_limits<uint16_t>::max(); i++) {
     ASSERT_TRUE(AddMethod("dex_location1", /* checksum */ 1, /* method_idx */ i, &saved_info));
     ASSERT_TRUE(AddMethod("dex_location2", /* checksum */ 2, /* method_idx */ i, &saved_info));
   }
   // Save the maximum number of classes
   for (uint16_t i = 0; i < std::numeric_limits<uint16_t>::max(); i++) {
     ASSERT_TRUE(AddClass("dex_location1", /* checksum */ 1, /* class_idx */ i, &saved_info));
     ASSERT_TRUE(AddClass("dex_location2", /* checksum */ 2, /* class_idx */ i, &saved_info));
   }

   ASSERT_TRUE(saved_info.Save(GetFd(profile)));
   ASSERT_EQ(0, profile.GetFile()->Flush());

   // Check that we get back what we saved.
   ProfileCompilationInfo loaded_info;
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_TRUE(loaded_info.Load(GetFd(profile)));
   ASSERT_TRUE(loaded_info.Equals(saved_info));
 }

 TEST_F(ProfileCompilationInfoTest, SaveEmpty) {
   ScratchFile profile;

   ProfileCompilationInfo saved_info;
   ASSERT_TRUE(saved_info.Save(GetFd(profile)));
   ASSERT_EQ(0, profile.GetFile()->Flush());

   // Check that we get back what we saved.
   ProfileCompilationInfo loaded_info;
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_TRUE(loaded_info.Load(GetFd(profile)));
   ASSERT_TRUE(loaded_info.Equals(saved_info));
 }

 TEST_F(ProfileCompilationInfoTest, LoadEmpty) {
   ScratchFile profile;

   ProfileCompilationInfo empyt_info;

   ProfileCompilationInfo loaded_info;
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_TRUE(loaded_info.Load(GetFd(profile)));
   ASSERT_TRUE(loaded_info.Equals(empyt_info));
 }

 TEST_F(ProfileCompilationInfoTest, BadMagic) {
   ScratchFile profile;
   uint8_t buffer[] = { 1, 2, 3, 4 };
   ASSERT_TRUE(profile.GetFile()->WriteFully(buffer, sizeof(buffer)));
   ProfileCompilationInfo loaded_info;
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_FALSE(loaded_info.Load(GetFd(profile)));
 }

 TEST_F(ProfileCompilationInfoTest, BadVersion) {
   ScratchFile profile;

   ASSERT_TRUE(profile.GetFile()->WriteFully(
       ProfileCompilationInfo::kProfileMagic, kProfileMagicSize));
   uint8_t version[] = { 'v', 'e', 'r', 's', 'i', 'o', 'n' };
   ASSERT_TRUE(profile.GetFile()->WriteFully(version, sizeof(version)));
   ASSERT_EQ(0, profile.GetFile()->Flush());

   ProfileCompilationInfo loaded_info;
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_FALSE(loaded_info.Load(GetFd(profile)));
 }

 TEST_F(ProfileCompilationInfoTest, Incomplete) {
   ScratchFile profile;
   ASSERT_TRUE(profile.GetFile()->WriteFully(
       ProfileCompilationInfo::kProfileMagic, kProfileMagicSize));
   ASSERT_TRUE(profile.GetFile()->WriteFully(
       ProfileCompilationInfo::kProfileVersion, kProfileVersionSize));
   // Write that we have at least one line.
   uint8_t line_number[] = { 0, 1 };
   ASSERT_TRUE(profile.GetFile()->WriteFully(line_number, sizeof(line_number)));
   ASSERT_EQ(0, profile.GetFile()->Flush());

   ProfileCompilationInfo loaded_info;
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_FALSE(loaded_info.Load(GetFd(profile)));
 }

 TEST_F(ProfileCompilationInfoTest, TooLongDexLocation) {
   ScratchFile profile;
   ASSERT_TRUE(profile.GetFile()->WriteFully(
       ProfileCompilationInfo::kProfileMagic, kProfileMagicSize));
   ASSERT_TRUE(profile.GetFile()->WriteFully(
       ProfileCompilationInfo::kProfileVersion, kProfileVersionSize));
   // Write that we have at least one line.
   uint8_t line_number[] = { 0, 1 };
   ASSERT_TRUE(profile.GetFile()->WriteFully(line_number, sizeof(line_number)));

   // dex_location_size, methods_size, classes_size, checksum.
   // Dex location size is too big and should be rejected.
   uint8_t line[] = { 255, 255, 0, 1, 0, 1, 0, 0, 0, 0 };
   ASSERT_TRUE(profile.GetFile()->WriteFully(line, sizeof(line)));
   ASSERT_EQ(0, profile.GetFile()->Flush());

   ProfileCompilationInfo loaded_info;
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_FALSE(loaded_info.Load(GetFd(profile)));
 }

 TEST_F(ProfileCompilationInfoTest, UnexpectedContent) {
   ScratchFile profile;

   ProfileCompilationInfo saved_info;
   // Save the maximum number of methods
   for (uint16_t i = 0; i < 10; i++) {
     ASSERT_TRUE(AddMethod("dex_location1", /* checksum */ 1, /* method_idx */ i, &saved_info));
   }
   ASSERT_TRUE(saved_info.Save(GetFd(profile)));

   uint8_t random_data[] = { 1, 2, 3};
   ASSERT_TRUE(profile.GetFile()->WriteFully(random_data, sizeof(random_data)));

   ASSERT_EQ(0, profile.GetFile()->Flush());

   // Check that we fail because of unexpected data at the end of the file.
   ProfileCompilationInfo loaded_info;
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ASSERT_FALSE(loaded_info.Load(GetFd(profile)));
 }

 }  // namespace art
	/*
	* 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 "base/unix_file/fd_file.h"
	#include "art_method-inl.h"
	#include "class_linker-inl.h"
	#include "common_runtime_test.h"
	#include "dex_file.h"
	#include "method_reference.h"
	#include "mirror/class-inl.h"
	#include "mirror/class_loader.h"
	#include "handle_scope-inl.h"
	#include "jit/offline_profiling_info.h"
	#include "scoped_thread_state_change.h"

	namespace art {

	class ProfileCompilationInfoTest : public CommonRuntimeTest {
	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(
	reinterpret_cast<mirror::ClassLoader*>(self->DecodeJObject(class_loader))));
	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;
	}

	bool AddMethod(const std::string& dex_location,
	uint32_t checksum,
	uint16_t method_index,
	ProfileCompilationInfo* info) {
	return info->AddMethodIndex(dex_location, checksum, method_index);
	}

	bool AddClass(const std::string& dex_location,
	uint32_t checksum,
	uint16_t class_index,
	ProfileCompilationInfo* info) {
	return info->AddMethodIndex(dex_location, checksum, class_index);
	}

	uint32_t GetFd(const ScratchFile& file) {
	return static_cast<uint32_t>(file.GetFd());
	}

	bool SaveProfilingInfo(
	const std::string& filename,
	const std::vector<ArtMethod*>& methods,
	const std::set<DexCacheResolvedClasses>& resolved_classes) {
	ProfileCompilationInfo info;
	std::vector<MethodReference> method_refs;
	ScopedObjectAccess soa(Thread::Current());
	for (ArtMethod* method : methods) {
	method_refs.emplace_back(method->GetDexFile(), method->GetDexMethodIndex());
	}
	if (!info.AddMethodsAndClasses(method_refs, resolved_classes)) {
	return false;
	}
	return info.MergeAndSave(filename, nullptr, false);
	}

	// Cannot sizeof the actual arrays so hardcode the values here.
	// They should not change anyway.
	static constexpr int kProfileMagicSize = 4;
	static constexpr int kProfileVersionSize = 4;
	};

	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::set<DexCacheResolvedClasses> resolved_classes;
	std::vector<ArtMethod*> main_methods = GetVirtualMethods(class_loader, "LMain;");
	ASSERT_TRUE(SaveProfilingInfo(profile.GetFilename(), main_methods, resolved_classes));

	// 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) {
	ASSERT_TRUE(info1.ContainsMethod(MethodReference(m->GetDexFile(), m->GetDexMethodIndex())));
	}
	}

	// Save virtual methods from Second.
	std::vector<ArtMethod*> second_methods = GetVirtualMethods(class_loader, "LSecond;");
	ASSERT_TRUE(SaveProfilingInfo(profile.GetFilename(), second_methods, resolved_classes));

	// 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) {
	ASSERT_TRUE(info2.ContainsMethod(MethodReference(m->GetDexFile(), m->GetDexMethodIndex())));
	}
	for (ArtMethod* m : second_methods) {
	ASSERT_TRUE(info2.ContainsMethod(MethodReference(m->GetDexFile(), m->GetDexMethodIndex())));
	}
	}
	}

	TEST_F(ProfileCompilationInfoTest, SaveFd) {
	ScratchFile profile;

	ProfileCompilationInfo saved_info;
	// Save a few methods.
	for (uint16_t i = 0; i < 10; i++) {
	ASSERT_TRUE(AddMethod("dex_location1", /* checksum / 1, / method_idx */ i, &saved_info));
	ASSERT_TRUE(AddMethod("dex_location2", /* checksum / 2, / method_idx */ i, &saved_info));
	}
	ASSERT_TRUE(saved_info.Save(GetFd(profile)));
	ASSERT_EQ(0, profile.GetFile()->Flush());

	// Check that we get back what we saved.
	ProfileCompilationInfo loaded_info;
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_TRUE(loaded_info.Load(GetFd(profile)));
	ASSERT_TRUE(loaded_info.Equals(saved_info));

	// Save more methods.
	for (uint16_t i = 0; i < 100; i++) {
	ASSERT_TRUE(AddMethod("dex_location1", /* checksum / 1, / method_idx */ i, &saved_info));
	ASSERT_TRUE(AddMethod("dex_location2", /* checksum / 2, / method_idx */ i, &saved_info));
	ASSERT_TRUE(AddMethod("dex_location3", /* checksum / 3, / method_idx */ i, &saved_info));
	}
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_TRUE(saved_info.Save(GetFd(profile)));
	ASSERT_EQ(0, profile.GetFile()->Flush());

	// Check that we get back everything we saved.
	ProfileCompilationInfo loaded_info2;
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_TRUE(loaded_info2.Load(GetFd(profile)));
	ASSERT_TRUE(loaded_info2.Equals(saved_info));
	}

	TEST_F(ProfileCompilationInfoTest, AddMethodsAndClassesFail) {
	ScratchFile profile;

	ProfileCompilationInfo info;
	ASSERT_TRUE(AddMethod("dex_location", /* checksum / 1, / method_idx */ 1, &info));
	// Trying to add info for an existing file but with a different checksum.
	ASSERT_FALSE(AddMethod("dex_location", /* checksum / 2, / method_idx */ 2, &info));
	}

	TEST_F(ProfileCompilationInfoTest, MergeFail) {
	ScratchFile profile;

	ProfileCompilationInfo info1;
	ASSERT_TRUE(AddMethod("dex_location", /* checksum / 1, / method_idx */ 1, &info1));
	// Use the same file, change the checksum.
	ProfileCompilationInfo info2;
	ASSERT_TRUE(AddMethod("dex_location", /* checksum / 2, / method_idx */ 2, &info2));

	ASSERT_FALSE(info1.MergeWith(info2));
	}

	TEST_F(ProfileCompilationInfoTest, SaveMaxMethods) {
	ScratchFile profile;

	ProfileCompilationInfo saved_info;
	// Save the maximum number of methods
	for (uint16_t i = 0; i < std::numeric_limits<uint16_t>::max(); i++) {
	ASSERT_TRUE(AddMethod("dex_location1", /* checksum / 1, / method_idx */ i, &saved_info));
	ASSERT_TRUE(AddMethod("dex_location2", /* checksum / 2, / method_idx */ i, &saved_info));
	}
	// Save the maximum number of classes
	for (uint16_t i = 0; i < std::numeric_limits<uint16_t>::max(); i++) {
	ASSERT_TRUE(AddClass("dex_location1", /* checksum / 1, / class_idx */ i, &saved_info));
	ASSERT_TRUE(AddClass("dex_location2", /* checksum / 2, / class_idx */ i, &saved_info));
	}

	ASSERT_TRUE(saved_info.Save(GetFd(profile)));
	ASSERT_EQ(0, profile.GetFile()->Flush());

	// Check that we get back what we saved.
	ProfileCompilationInfo loaded_info;
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_TRUE(loaded_info.Load(GetFd(profile)));
	ASSERT_TRUE(loaded_info.Equals(saved_info));
	}

	TEST_F(ProfileCompilationInfoTest, SaveEmpty) {
	ScratchFile profile;

	ProfileCompilationInfo saved_info;
	ASSERT_TRUE(saved_info.Save(GetFd(profile)));
	ASSERT_EQ(0, profile.GetFile()->Flush());

	// Check that we get back what we saved.
	ProfileCompilationInfo loaded_info;
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_TRUE(loaded_info.Load(GetFd(profile)));
	ASSERT_TRUE(loaded_info.Equals(saved_info));
	}

	TEST_F(ProfileCompilationInfoTest, LoadEmpty) {
	ScratchFile profile;

	ProfileCompilationInfo empyt_info;

	ProfileCompilationInfo loaded_info;
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_TRUE(loaded_info.Load(GetFd(profile)));
	ASSERT_TRUE(loaded_info.Equals(empyt_info));
	}

	TEST_F(ProfileCompilationInfoTest, BadMagic) {
	ScratchFile profile;
	uint8_t buffer[] = { 1, 2, 3, 4 };
	ASSERT_TRUE(profile.GetFile()->WriteFully(buffer, sizeof(buffer)));
	ProfileCompilationInfo loaded_info;
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_FALSE(loaded_info.Load(GetFd(profile)));
	}

	TEST_F(ProfileCompilationInfoTest, BadVersion) {
	ScratchFile profile;

	ASSERT_TRUE(profile.GetFile()->WriteFully(
	ProfileCompilationInfo::kProfileMagic, kProfileMagicSize));
	uint8_t version[] = { 'v', 'e', 'r', 's', 'i', 'o', 'n' };
	ASSERT_TRUE(profile.GetFile()->WriteFully(version, sizeof(version)));
	ASSERT_EQ(0, profile.GetFile()->Flush());

	ProfileCompilationInfo loaded_info;
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_FALSE(loaded_info.Load(GetFd(profile)));
	}

	TEST_F(ProfileCompilationInfoTest, Incomplete) {
	ScratchFile profile;
	ASSERT_TRUE(profile.GetFile()->WriteFully(
	ProfileCompilationInfo::kProfileMagic, kProfileMagicSize));
	ASSERT_TRUE(profile.GetFile()->WriteFully(
	ProfileCompilationInfo::kProfileVersion, kProfileVersionSize));
	// Write that we have at least one line.
	uint8_t line_number[] = { 0, 1 };
	ASSERT_TRUE(profile.GetFile()->WriteFully(line_number, sizeof(line_number)));
	ASSERT_EQ(0, profile.GetFile()->Flush());

	ProfileCompilationInfo loaded_info;
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_FALSE(loaded_info.Load(GetFd(profile)));
	}

	TEST_F(ProfileCompilationInfoTest, TooLongDexLocation) {
	ScratchFile profile;
	ASSERT_TRUE(profile.GetFile()->WriteFully(
	ProfileCompilationInfo::kProfileMagic, kProfileMagicSize));
	ASSERT_TRUE(profile.GetFile()->WriteFully(
	ProfileCompilationInfo::kProfileVersion, kProfileVersionSize));
	// Write that we have at least one line.
	uint8_t line_number[] = { 0, 1 };
	ASSERT_TRUE(profile.GetFile()->WriteFully(line_number, sizeof(line_number)));

	// dex_location_size, methods_size, classes_size, checksum.
	// Dex location size is too big and should be rejected.
	uint8_t line[] = { 255, 255, 0, 1, 0, 1, 0, 0, 0, 0 };
	ASSERT_TRUE(profile.GetFile()->WriteFully(line, sizeof(line)));
	ASSERT_EQ(0, profile.GetFile()->Flush());

	ProfileCompilationInfo loaded_info;
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_FALSE(loaded_info.Load(GetFd(profile)));
	}

	TEST_F(ProfileCompilationInfoTest, UnexpectedContent) {
	ScratchFile profile;

	ProfileCompilationInfo saved_info;
	// Save the maximum number of methods
	for (uint16_t i = 0; i < 10; i++) {
	ASSERT_TRUE(AddMethod("dex_location1", /* checksum / 1, / method_idx */ i, &saved_info));
	}
	ASSERT_TRUE(saved_info.Save(GetFd(profile)));

	uint8_t random_data[] = { 1, 2, 3};
	ASSERT_TRUE(profile.GetFile()->WriteFully(random_data, sizeof(random_data)));

	ASSERT_EQ(0, profile.GetFile()->Flush());

	// Check that we fail because of unexpected data at the end of the file.
	ProfileCompilationInfo loaded_info;
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ASSERT_FALSE(loaded_info.Load(GetFd(profile)));
	}

	} // namespace art