profman/profile_assistant_test.cc - platform/art - Git at Google

 /*
  * 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 "common_runtime_test.h"
 #include "exec_utils.h"
 #include "profile_assistant.h"
 #include "jit/profile_compilation_info.h"
 #include "utils.h"

 namespace art {

 class ProfileAssistantTest : public CommonRuntimeTest {
  protected:
   void SetupProfile(const std::string& id,
                     uint32_t checksum,
                     uint16_t number_of_methods,
                     uint16_t number_of_classes,
                     const ScratchFile& profile,
                     ProfileCompilationInfo* info,
                     uint16_t start_method_index = 0) {
     std::string dex_location1 = "location1" + id;
     uint32_t dex_location_checksum1 = checksum;
     std::string dex_location2 = "location2" + id;
     uint32_t dex_location_checksum2 = 10 * checksum;
     for (uint16_t i = start_method_index; i < start_method_index + number_of_methods; i++) {
       ASSERT_TRUE(info->AddMethodIndex(dex_location1, dex_location_checksum1, i));
       ASSERT_TRUE(info->AddMethodIndex(dex_location2, dex_location_checksum2, i));
     }
     for (uint16_t i = 0; i < number_of_classes; i++) {
       ASSERT_TRUE(info->AddClassIndex(dex_location1, dex_location_checksum1, dex::TypeIndex(i)));
     }

     ASSERT_TRUE(info->Save(GetFd(profile)));
     ASSERT_EQ(0, profile.GetFile()->Flush());
     ASSERT_TRUE(profile.GetFile()->ResetOffset());
   }

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

   void CheckProfileInfo(ScratchFile& file, const ProfileCompilationInfo& info) {
     ProfileCompilationInfo file_info;
     ASSERT_TRUE(file.GetFile()->ResetOffset());
     ASSERT_TRUE(file_info.Load(GetFd(file)));
     ASSERT_TRUE(file_info.Equals(info));
   }

   std::string GetProfmanCmd() {
     std::string file_path = GetTestAndroidRoot();
     file_path += "/bin/profman";
     if (kIsDebugBuild) {
       file_path += "d";
     }
     EXPECT_TRUE(OS::FileExists(file_path.c_str()))
         << file_path << " should be a valid file path";
     return file_path;
   }
   // Runs test with given arguments.
   int ProcessProfiles(const std::vector<int>& profiles_fd, int reference_profile_fd) {
     std::string profman_cmd = GetProfmanCmd();
     std::vector<std::string> argv_str;
     argv_str.push_back(profman_cmd);
     for (size_t k = 0; k < profiles_fd.size(); k++) {
       argv_str.push_back("--profile-file-fd=" + std::to_string(profiles_fd[k]));
     }
     argv_str.push_back("--reference-profile-file-fd=" + std::to_string(reference_profile_fd));

     std::string error;
     return ExecAndReturnCode(argv_str, &error);
   }

   bool GenerateTestProfile(const std::string& filename) {
     std::string profman_cmd = GetProfmanCmd();
     std::vector<std::string> argv_str;
     argv_str.push_back(profman_cmd);
     argv_str.push_back("--generate-test-profile=" + filename);
     std::string error;
     return ExecAndReturnCode(argv_str, &error);
   }

   bool CreateProfile(std::string class_file_contents, const std::string& filename) {
     ScratchFile class_names_file;
     File* file = class_names_file.GetFile();
     EXPECT_TRUE(file->WriteFully(class_file_contents.c_str(), class_file_contents.length()));
     EXPECT_EQ(0, file->Flush());
     EXPECT_TRUE(file->ResetOffset());
     std::string profman_cmd = GetProfmanCmd();
     std::vector<std::string> argv_str;
     argv_str.push_back(profman_cmd);
     argv_str.push_back("--create-profile-from=" + class_names_file.GetFilename());
     argv_str.push_back("--reference-profile-file=" + filename);
     argv_str.push_back("--apk=" + GetLibCoreDexFileNames()[0]);
     argv_str.push_back("--dex-location=classes.dex");
     std::string error;
     EXPECT_EQ(ExecAndReturnCode(argv_str, &error), 0);
     return true;
   }

   bool DumpClasses(const std::string& filename, std::string* file_contents) {
     ScratchFile class_names_file;
     std::string profman_cmd = GetProfmanCmd();
     std::vector<std::string> argv_str;
     argv_str.push_back(profman_cmd);
     argv_str.push_back("--dump-classes");
     argv_str.push_back("--profile-file=" + filename);
     argv_str.push_back("--apk=" + GetLibCoreDexFileNames()[0]);
     argv_str.push_back("--dex-location=classes.dex");
     argv_str.push_back("--dump-output-to-fd=" + std::to_string(GetFd(class_names_file)));
     std::string error;
     EXPECT_EQ(ExecAndReturnCode(argv_str, &error), 0);
     File* file = class_names_file.GetFile();
     EXPECT_EQ(0, file->Flush());
     EXPECT_TRUE(file->ResetOffset());
     int64_t length = file->GetLength();
     std::unique_ptr<char[]> buf(new char[length]);
     EXPECT_EQ(file->Read(buf.get(), length, 0), length);
     *file_contents = std::string(buf.get(), length);
     return true;
   }

   bool CreateAndDump(const std::string& input_file_contents, std::string* output_file_contents) {
     ScratchFile profile_file;
     EXPECT_TRUE(CreateProfile(input_file_contents, profile_file.GetFilename()));
     profile_file.GetFile()->ResetOffset();
     EXPECT_TRUE(DumpClasses(profile_file.GetFilename(), output_file_contents));
     return true;
   }
 };

 TEST_F(ProfileAssistantTest, AdviseCompilationEmptyReferences) {
   ScratchFile profile1;
   ScratchFile profile2;
   ScratchFile reference_profile;

   std::vector<int> profile_fds({
       GetFd(profile1),
       GetFd(profile2)});
   int reference_profile_fd = GetFd(reference_profile);

   const uint16_t kNumberOfMethodsToEnableCompilation = 100;
   ProfileCompilationInfo info1;
   SetupProfile("p1", 1, kNumberOfMethodsToEnableCompilation, 0, profile1, &info1);
   ProfileCompilationInfo info2;
   SetupProfile("p2", 2, kNumberOfMethodsToEnableCompilation, 0, profile2, &info2);

   // We should advise compilation.
   ASSERT_EQ(ProfileAssistant::kCompile,
             ProcessProfiles(profile_fds, reference_profile_fd));
   // The resulting compilation info must be equal to the merge of the inputs.
   ProfileCompilationInfo result;
   ASSERT_TRUE(reference_profile.GetFile()->ResetOffset());
   ASSERT_TRUE(result.Load(reference_profile_fd));

   ProfileCompilationInfo expected;
   ASSERT_TRUE(expected.MergeWith(info1));
   ASSERT_TRUE(expected.MergeWith(info2));
   ASSERT_TRUE(expected.Equals(result));

   // The information from profiles must remain the same.
   CheckProfileInfo(profile1, info1);
   CheckProfileInfo(profile2, info2);
 }

 // TODO(calin): Add more tests for classes.
 TEST_F(ProfileAssistantTest, AdviseCompilationEmptyReferencesBecauseOfClasses) {
   ScratchFile profile1;
   ScratchFile reference_profile;

   std::vector<int> profile_fds({
       GetFd(profile1)});
   int reference_profile_fd = GetFd(reference_profile);

   const uint16_t kNumberOfClassesToEnableCompilation = 100;
   ProfileCompilationInfo info1;
   SetupProfile("p1", 1, 0, kNumberOfClassesToEnableCompilation, profile1, &info1);

   // We should advise compilation.
   ASSERT_EQ(ProfileAssistant::kCompile,
             ProcessProfiles(profile_fds, reference_profile_fd));
   // The resulting compilation info must be equal to the merge of the inputs.
   ProfileCompilationInfo result;
   ASSERT_TRUE(reference_profile.GetFile()->ResetOffset());
   ASSERT_TRUE(result.Load(reference_profile_fd));

   ProfileCompilationInfo expected;
   ASSERT_TRUE(expected.MergeWith(info1));
   ASSERT_TRUE(expected.Equals(result));

   // The information from profiles must remain the same.
   CheckProfileInfo(profile1, info1);
 }

 TEST_F(ProfileAssistantTest, AdviseCompilationNonEmptyReferences) {
   ScratchFile profile1;
   ScratchFile profile2;
   ScratchFile reference_profile;

   std::vector<int> profile_fds({
       GetFd(profile1),
       GetFd(profile2)});
   int reference_profile_fd = GetFd(reference_profile);

   // The new profile info will contain the methods with indices 0-100.
   const uint16_t kNumberOfMethodsToEnableCompilation = 100;
   ProfileCompilationInfo info1;
   SetupProfile("p1", 1, kNumberOfMethodsToEnableCompilation, 0, profile1, &info1);
   ProfileCompilationInfo info2;
   SetupProfile("p2", 2, kNumberOfMethodsToEnableCompilation, 0, profile2, &info2);


   // The reference profile info will contain the methods with indices 50-150.
   const uint16_t kNumberOfMethodsAlreadyCompiled = 100;
   ProfileCompilationInfo reference_info;
   SetupProfile("p1", 1, kNumberOfMethodsAlreadyCompiled, 0, reference_profile,
       &reference_info, kNumberOfMethodsToEnableCompilation / 2);

   // We should advise compilation.
   ASSERT_EQ(ProfileAssistant::kCompile,
             ProcessProfiles(profile_fds, reference_profile_fd));

   // The resulting compilation info must be equal to the merge of the inputs
   ProfileCompilationInfo result;
   ASSERT_TRUE(reference_profile.GetFile()->ResetOffset());
   ASSERT_TRUE(result.Load(reference_profile_fd));

   ProfileCompilationInfo expected;
   ASSERT_TRUE(expected.MergeWith(info1));
   ASSERT_TRUE(expected.MergeWith(info2));
   ASSERT_TRUE(expected.MergeWith(reference_info));
   ASSERT_TRUE(expected.Equals(result));

   // The information from profiles must remain the same.
   CheckProfileInfo(profile1, info1);
   CheckProfileInfo(profile2, info2);
 }

 TEST_F(ProfileAssistantTest, DoNotAdviseCompilation) {
   ScratchFile profile1;
   ScratchFile profile2;
   ScratchFile reference_profile;

   std::vector<int> profile_fds({
       GetFd(profile1),
       GetFd(profile2)});
   int reference_profile_fd = GetFd(reference_profile);

   const uint16_t kNumberOfMethodsToSkipCompilation = 1;
   ProfileCompilationInfo info1;
   SetupProfile("p1", 1, kNumberOfMethodsToSkipCompilation, 0, profile1, &info1);
   ProfileCompilationInfo info2;
   SetupProfile("p2", 2, kNumberOfMethodsToSkipCompilation, 0, profile2, &info2);

   // We should not advise compilation.
   ASSERT_EQ(ProfileAssistant::kSkipCompilation,
             ProcessProfiles(profile_fds, reference_profile_fd));

   // The information from profiles must remain the same.
   ProfileCompilationInfo file_info1;
   ASSERT_TRUE(profile1.GetFile()->ResetOffset());
   ASSERT_TRUE(file_info1.Load(GetFd(profile1)));
   ASSERT_TRUE(file_info1.Equals(info1));

   ProfileCompilationInfo file_info2;
   ASSERT_TRUE(profile2.GetFile()->ResetOffset());
   ASSERT_TRUE(file_info2.Load(GetFd(profile2)));
   ASSERT_TRUE(file_info2.Equals(info2));

   // Reference profile files must remain empty.
   ASSERT_EQ(0, reference_profile.GetFile()->GetLength());

   // The information from profiles must remain the same.
   CheckProfileInfo(profile1, info1);
   CheckProfileInfo(profile2, info2);
 }

 TEST_F(ProfileAssistantTest, FailProcessingBecauseOfProfiles) {
   ScratchFile profile1;
   ScratchFile profile2;
   ScratchFile reference_profile;

   std::vector<int> profile_fds({
       GetFd(profile1),
       GetFd(profile2)});
   int reference_profile_fd = GetFd(reference_profile);

   const uint16_t kNumberOfMethodsToEnableCompilation = 100;
   // Assign different hashes for the same dex file. This will make merging of information to fail.
   ProfileCompilationInfo info1;
   SetupProfile("p1", 1, kNumberOfMethodsToEnableCompilation, 0, profile1, &info1);
   ProfileCompilationInfo info2;
   SetupProfile("p1", 2, kNumberOfMethodsToEnableCompilation, 0, profile2, &info2);

   // We should fail processing.
   ASSERT_EQ(ProfileAssistant::kErrorBadProfiles,
             ProcessProfiles(profile_fds, reference_profile_fd));

   // The information from profiles must remain the same.
   CheckProfileInfo(profile1, info1);
   CheckProfileInfo(profile2, info2);

   // Reference profile files must still remain empty.
   ASSERT_EQ(0, reference_profile.GetFile()->GetLength());
 }

 TEST_F(ProfileAssistantTest, FailProcessingBecauseOfReferenceProfiles) {
   ScratchFile profile1;
   ScratchFile reference_profile;

   std::vector<int> profile_fds({
       GetFd(profile1)});
   int reference_profile_fd = GetFd(reference_profile);

   const uint16_t kNumberOfMethodsToEnableCompilation = 100;
   // Assign different hashes for the same dex file. This will make merging of information to fail.
   ProfileCompilationInfo info1;
   SetupProfile("p1", 1, kNumberOfMethodsToEnableCompilation, 0, profile1, &info1);
   ProfileCompilationInfo reference_info;
   SetupProfile("p1", 2, kNumberOfMethodsToEnableCompilation, 0, reference_profile, &reference_info);

   // We should not advise compilation.
   ASSERT_TRUE(profile1.GetFile()->ResetOffset());
   ASSERT_TRUE(reference_profile.GetFile()->ResetOffset());
   ASSERT_EQ(ProfileAssistant::kErrorBadProfiles,
             ProcessProfiles(profile_fds, reference_profile_fd));

   // The information from profiles must remain the same.
   CheckProfileInfo(profile1, info1);
 }

 TEST_F(ProfileAssistantTest, TestProfileGeneration) {
   ScratchFile profile;
   // Generate a test profile.
   GenerateTestProfile(profile.GetFilename());

   // Verify that the generated profile is valid and can be loaded.
   ASSERT_TRUE(profile.GetFile()->ResetOffset());
   ProfileCompilationInfo info;
   ASSERT_TRUE(info.Load(GetFd(profile)));
 }

 TEST_F(ProfileAssistantTest, TestProfileCreationAllMatch) {
   // Class names put here need to be in sorted order.
   std::vector<std::string> class_names = {
     "java.lang.Comparable",
     "java.lang.Math",
     "java.lang.Object"
   };
   std::string input_file_contents;
   for (std::string& class_name : class_names) {
     input_file_contents += class_name + std::string("\n");
   }
   std::string output_file_contents;
   ASSERT_TRUE(CreateAndDump(input_file_contents, &output_file_contents));
   ASSERT_EQ(output_file_contents, input_file_contents);
 }

 TEST_F(ProfileAssistantTest, TestProfileCreationOneNotMatched) {
   // Class names put here need to be in sorted order.
   std::vector<std::string> class_names = {
     "doesnt.match.this.one",
     "java.lang.Comparable",
     "java.lang.Object"
   };
   std::string input_file_contents;
   for (std::string& class_name : class_names) {
     input_file_contents += class_name + std::string("\n");
   }
   std::string output_file_contents;
   ASSERT_TRUE(CreateAndDump(input_file_contents, &output_file_contents));
   std::string expected_contents =
       class_names[1] + std::string("\n") + class_names[2] + std::string("\n");
   ASSERT_EQ(output_file_contents, expected_contents);
 }

 TEST_F(ProfileAssistantTest, TestProfileCreationNoneMatched) {
   // Class names put here need to be in sorted order.
   std::vector<std::string> class_names = {
     "doesnt.match.this.one",
     "doesnt.match.this.one.either",
     "nor.this.one"
   };
   std::string input_file_contents;
   for (std::string& class_name : class_names) {
     input_file_contents += class_name + std::string("\n");
   }
   std::string output_file_contents;
   ASSERT_TRUE(CreateAndDump(input_file_contents, &output_file_contents));
   std::string expected_contents("");
   ASSERT_EQ(output_file_contents, expected_contents);
 }

 }  // 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 "common_runtime_test.h"
	#include "exec_utils.h"
	#include "profile_assistant.h"
	#include "jit/profile_compilation_info.h"
	#include "utils.h"

	namespace art {

	class ProfileAssistantTest : public CommonRuntimeTest {
	protected:
	void SetupProfile(const std::string& id,
	uint32_t checksum,
	uint16_t number_of_methods,
	uint16_t number_of_classes,
	const ScratchFile& profile,
	ProfileCompilationInfo* info,
	uint16_t start_method_index = 0) {
	std::string dex_location1 = "location1" + id;
	uint32_t dex_location_checksum1 = checksum;
	std::string dex_location2 = "location2" + id;
	uint32_t dex_location_checksum2 = 10 * checksum;
	for (uint16_t i = start_method_index; i < start_method_index + number_of_methods; i++) {
	ASSERT_TRUE(info->AddMethodIndex(dex_location1, dex_location_checksum1, i));
	ASSERT_TRUE(info->AddMethodIndex(dex_location2, dex_location_checksum2, i));
	}
	for (uint16_t i = 0; i < number_of_classes; i++) {
	ASSERT_TRUE(info->AddClassIndex(dex_location1, dex_location_checksum1, dex::TypeIndex(i)));
	}

	ASSERT_TRUE(info->Save(GetFd(profile)));
	ASSERT_EQ(0, profile.GetFile()->Flush());
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	}

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

	void CheckProfileInfo(ScratchFile& file, const ProfileCompilationInfo& info) {
	ProfileCompilationInfo file_info;
	ASSERT_TRUE(file.GetFile()->ResetOffset());
	ASSERT_TRUE(file_info.Load(GetFd(file)));
	ASSERT_TRUE(file_info.Equals(info));
	}

	std::string GetProfmanCmd() {
	std::string file_path = GetTestAndroidRoot();
	file_path += "/bin/profman";
	if (kIsDebugBuild) {
	file_path += "d";
	}
	EXPECT_TRUE(OS::FileExists(file_path.c_str()))
	<< file_path << " should be a valid file path";
	return file_path;
	}
	// Runs test with given arguments.
	int ProcessProfiles(const std::vector<int>& profiles_fd, int reference_profile_fd) {
	std::string profman_cmd = GetProfmanCmd();
	std::vector<std::string> argv_str;
	argv_str.push_back(profman_cmd);
	for (size_t k = 0; k < profiles_fd.size(); k++) {
	argv_str.push_back("--profile-file-fd=" + std::to_string(profiles_fd[k]));
	}
	argv_str.push_back("--reference-profile-file-fd=" + std::to_string(reference_profile_fd));

	std::string error;
	return ExecAndReturnCode(argv_str, &error);
	}

	bool GenerateTestProfile(const std::string& filename) {
	std::string profman_cmd = GetProfmanCmd();
	std::vector<std::string> argv_str;
	argv_str.push_back(profman_cmd);
	argv_str.push_back("--generate-test-profile=" + filename);
	std::string error;
	return ExecAndReturnCode(argv_str, &error);
	}

	bool CreateProfile(std::string class_file_contents, const std::string& filename) {
	ScratchFile class_names_file;
	File* file = class_names_file.GetFile();
	EXPECT_TRUE(file->WriteFully(class_file_contents.c_str(), class_file_contents.length()));
	EXPECT_EQ(0, file->Flush());
	EXPECT_TRUE(file->ResetOffset());
	std::string profman_cmd = GetProfmanCmd();
	std::vector<std::string> argv_str;
	argv_str.push_back(profman_cmd);
	argv_str.push_back("--create-profile-from=" + class_names_file.GetFilename());
	argv_str.push_back("--reference-profile-file=" + filename);
	argv_str.push_back("--apk=" + GetLibCoreDexFileNames()[0]);
	argv_str.push_back("--dex-location=classes.dex");
	std::string error;
	EXPECT_EQ(ExecAndReturnCode(argv_str, &error), 0);
	return true;
	}

	bool DumpClasses(const std::string& filename, std::string* file_contents) {
	ScratchFile class_names_file;
	std::string profman_cmd = GetProfmanCmd();
	std::vector<std::string> argv_str;
	argv_str.push_back(profman_cmd);
	argv_str.push_back("--dump-classes");
	argv_str.push_back("--profile-file=" + filename);
	argv_str.push_back("--apk=" + GetLibCoreDexFileNames()[0]);
	argv_str.push_back("--dex-location=classes.dex");
	argv_str.push_back("--dump-output-to-fd=" + std::to_string(GetFd(class_names_file)));
	std::string error;
	EXPECT_EQ(ExecAndReturnCode(argv_str, &error), 0);
	File* file = class_names_file.GetFile();
	EXPECT_EQ(0, file->Flush());
	EXPECT_TRUE(file->ResetOffset());
	int64_t length = file->GetLength();
	std::unique_ptr<char[]> buf(new char[length]);
	EXPECT_EQ(file->Read(buf.get(), length, 0), length);
	*file_contents = std::string(buf.get(), length);
	return true;
	}

	bool CreateAndDump(const std::string& input_file_contents, std::string* output_file_contents) {
	ScratchFile profile_file;
	EXPECT_TRUE(CreateProfile(input_file_contents, profile_file.GetFilename()));
	profile_file.GetFile()->ResetOffset();
	EXPECT_TRUE(DumpClasses(profile_file.GetFilename(), output_file_contents));
	return true;
	}
	};

	TEST_F(ProfileAssistantTest, AdviseCompilationEmptyReferences) {
	ScratchFile profile1;
	ScratchFile profile2;
	ScratchFile reference_profile;

	std::vector<int> profile_fds({
	GetFd(profile1),
	GetFd(profile2)});
	int reference_profile_fd = GetFd(reference_profile);

	const uint16_t kNumberOfMethodsToEnableCompilation = 100;
	ProfileCompilationInfo info1;
	SetupProfile("p1", 1, kNumberOfMethodsToEnableCompilation, 0, profile1, &info1);
	ProfileCompilationInfo info2;
	SetupProfile("p2", 2, kNumberOfMethodsToEnableCompilation, 0, profile2, &info2);

	// We should advise compilation.
	ASSERT_EQ(ProfileAssistant::kCompile,
	ProcessProfiles(profile_fds, reference_profile_fd));
	// The resulting compilation info must be equal to the merge of the inputs.
	ProfileCompilationInfo result;
	ASSERT_TRUE(reference_profile.GetFile()->ResetOffset());
	ASSERT_TRUE(result.Load(reference_profile_fd));

	ProfileCompilationInfo expected;
	ASSERT_TRUE(expected.MergeWith(info1));
	ASSERT_TRUE(expected.MergeWith(info2));
	ASSERT_TRUE(expected.Equals(result));

	// The information from profiles must remain the same.
	CheckProfileInfo(profile1, info1);
	CheckProfileInfo(profile2, info2);
	}

	// TODO(calin): Add more tests for classes.
	TEST_F(ProfileAssistantTest, AdviseCompilationEmptyReferencesBecauseOfClasses) {
	ScratchFile profile1;
	ScratchFile reference_profile;

	std::vector<int> profile_fds({
	GetFd(profile1)});
	int reference_profile_fd = GetFd(reference_profile);

	const uint16_t kNumberOfClassesToEnableCompilation = 100;
	ProfileCompilationInfo info1;
	SetupProfile("p1", 1, 0, kNumberOfClassesToEnableCompilation, profile1, &info1);

	// We should advise compilation.
	ASSERT_EQ(ProfileAssistant::kCompile,
	ProcessProfiles(profile_fds, reference_profile_fd));
	// The resulting compilation info must be equal to the merge of the inputs.
	ProfileCompilationInfo result;
	ASSERT_TRUE(reference_profile.GetFile()->ResetOffset());
	ASSERT_TRUE(result.Load(reference_profile_fd));

	ProfileCompilationInfo expected;
	ASSERT_TRUE(expected.MergeWith(info1));
	ASSERT_TRUE(expected.Equals(result));

	// The information from profiles must remain the same.
	CheckProfileInfo(profile1, info1);
	}

	TEST_F(ProfileAssistantTest, AdviseCompilationNonEmptyReferences) {
	ScratchFile profile1;
	ScratchFile profile2;
	ScratchFile reference_profile;

	std::vector<int> profile_fds({
	GetFd(profile1),
	GetFd(profile2)});
	int reference_profile_fd = GetFd(reference_profile);

	// The new profile info will contain the methods with indices 0-100.
	const uint16_t kNumberOfMethodsToEnableCompilation = 100;
	ProfileCompilationInfo info1;
	SetupProfile("p1", 1, kNumberOfMethodsToEnableCompilation, 0, profile1, &info1);
	ProfileCompilationInfo info2;
	SetupProfile("p2", 2, kNumberOfMethodsToEnableCompilation, 0, profile2, &info2);


	// The reference profile info will contain the methods with indices 50-150.
	const uint16_t kNumberOfMethodsAlreadyCompiled = 100;
	ProfileCompilationInfo reference_info;
	SetupProfile("p1", 1, kNumberOfMethodsAlreadyCompiled, 0, reference_profile,
	&reference_info, kNumberOfMethodsToEnableCompilation / 2);

	// We should advise compilation.
	ASSERT_EQ(ProfileAssistant::kCompile,
	ProcessProfiles(profile_fds, reference_profile_fd));

	// The resulting compilation info must be equal to the merge of the inputs
	ProfileCompilationInfo result;
	ASSERT_TRUE(reference_profile.GetFile()->ResetOffset());
	ASSERT_TRUE(result.Load(reference_profile_fd));

	ProfileCompilationInfo expected;
	ASSERT_TRUE(expected.MergeWith(info1));
	ASSERT_TRUE(expected.MergeWith(info2));
	ASSERT_TRUE(expected.MergeWith(reference_info));
	ASSERT_TRUE(expected.Equals(result));

	// The information from profiles must remain the same.
	CheckProfileInfo(profile1, info1);
	CheckProfileInfo(profile2, info2);
	}

	TEST_F(ProfileAssistantTest, DoNotAdviseCompilation) {
	ScratchFile profile1;
	ScratchFile profile2;
	ScratchFile reference_profile;

	std::vector<int> profile_fds({
	GetFd(profile1),
	GetFd(profile2)});
	int reference_profile_fd = GetFd(reference_profile);

	const uint16_t kNumberOfMethodsToSkipCompilation = 1;
	ProfileCompilationInfo info1;
	SetupProfile("p1", 1, kNumberOfMethodsToSkipCompilation, 0, profile1, &info1);
	ProfileCompilationInfo info2;
	SetupProfile("p2", 2, kNumberOfMethodsToSkipCompilation, 0, profile2, &info2);

	// We should not advise compilation.
	ASSERT_EQ(ProfileAssistant::kSkipCompilation,
	ProcessProfiles(profile_fds, reference_profile_fd));

	// The information from profiles must remain the same.
	ProfileCompilationInfo file_info1;
	ASSERT_TRUE(profile1.GetFile()->ResetOffset());
	ASSERT_TRUE(file_info1.Load(GetFd(profile1)));
	ASSERT_TRUE(file_info1.Equals(info1));

	ProfileCompilationInfo file_info2;
	ASSERT_TRUE(profile2.GetFile()->ResetOffset());
	ASSERT_TRUE(file_info2.Load(GetFd(profile2)));
	ASSERT_TRUE(file_info2.Equals(info2));

	// Reference profile files must remain empty.
	ASSERT_EQ(0, reference_profile.GetFile()->GetLength());

	// The information from profiles must remain the same.
	CheckProfileInfo(profile1, info1);
	CheckProfileInfo(profile2, info2);
	}

	TEST_F(ProfileAssistantTest, FailProcessingBecauseOfProfiles) {
	ScratchFile profile1;
	ScratchFile profile2;
	ScratchFile reference_profile;

	std::vector<int> profile_fds({
	GetFd(profile1),
	GetFd(profile2)});
	int reference_profile_fd = GetFd(reference_profile);

	const uint16_t kNumberOfMethodsToEnableCompilation = 100;
	// Assign different hashes for the same dex file. This will make merging of information to fail.
	ProfileCompilationInfo info1;
	SetupProfile("p1", 1, kNumberOfMethodsToEnableCompilation, 0, profile1, &info1);
	ProfileCompilationInfo info2;
	SetupProfile("p1", 2, kNumberOfMethodsToEnableCompilation, 0, profile2, &info2);

	// We should fail processing.
	ASSERT_EQ(ProfileAssistant::kErrorBadProfiles,
	ProcessProfiles(profile_fds, reference_profile_fd));

	// The information from profiles must remain the same.
	CheckProfileInfo(profile1, info1);
	CheckProfileInfo(profile2, info2);

	// Reference profile files must still remain empty.
	ASSERT_EQ(0, reference_profile.GetFile()->GetLength());
	}

	TEST_F(ProfileAssistantTest, FailProcessingBecauseOfReferenceProfiles) {
	ScratchFile profile1;
	ScratchFile reference_profile;

	std::vector<int> profile_fds({
	GetFd(profile1)});
	int reference_profile_fd = GetFd(reference_profile);

	const uint16_t kNumberOfMethodsToEnableCompilation = 100;
	// Assign different hashes for the same dex file. This will make merging of information to fail.
	ProfileCompilationInfo info1;
	SetupProfile("p1", 1, kNumberOfMethodsToEnableCompilation, 0, profile1, &info1);
	ProfileCompilationInfo reference_info;
	SetupProfile("p1", 2, kNumberOfMethodsToEnableCompilation, 0, reference_profile, &reference_info);

	// We should not advise compilation.
	ASSERT_TRUE(profile1.GetFile()->ResetOffset());
	ASSERT_TRUE(reference_profile.GetFile()->ResetOffset());
	ASSERT_EQ(ProfileAssistant::kErrorBadProfiles,
	ProcessProfiles(profile_fds, reference_profile_fd));

	// The information from profiles must remain the same.
	CheckProfileInfo(profile1, info1);
	}

	TEST_F(ProfileAssistantTest, TestProfileGeneration) {
	ScratchFile profile;
	// Generate a test profile.
	GenerateTestProfile(profile.GetFilename());

	// Verify that the generated profile is valid and can be loaded.
	ASSERT_TRUE(profile.GetFile()->ResetOffset());
	ProfileCompilationInfo info;
	ASSERT_TRUE(info.Load(GetFd(profile)));
	}

	TEST_F(ProfileAssistantTest, TestProfileCreationAllMatch) {
	// Class names put here need to be in sorted order.
	std::vector<std::string> class_names = {
	"java.lang.Comparable",
	"java.lang.Math",
	"java.lang.Object"
	};
	std::string input_file_contents;
	for (std::string& class_name : class_names) {
	input_file_contents += class_name + std::string("\n");
	}
	std::string output_file_contents;
	ASSERT_TRUE(CreateAndDump(input_file_contents, &output_file_contents));
	ASSERT_EQ(output_file_contents, input_file_contents);
	}

	TEST_F(ProfileAssistantTest, TestProfileCreationOneNotMatched) {
	// Class names put here need to be in sorted order.
	std::vector<std::string> class_names = {
	"doesnt.match.this.one",
	"java.lang.Comparable",
	"java.lang.Object"
	};
	std::string input_file_contents;
	for (std::string& class_name : class_names) {
	input_file_contents += class_name + std::string("\n");
	}
	std::string output_file_contents;
	ASSERT_TRUE(CreateAndDump(input_file_contents, &output_file_contents));
	std::string expected_contents =
	class_names[1] + std::string("\n") + class_names[2] + std::string("\n");
	ASSERT_EQ(output_file_contents, expected_contents);
	}

	TEST_F(ProfileAssistantTest, TestProfileCreationNoneMatched) {
	// Class names put here need to be in sorted order.
	std::vector<std::string> class_names = {
	"doesnt.match.this.one",
	"doesnt.match.this.one.either",
	"nor.this.one"
	};
	std::string input_file_contents;
	for (std::string& class_name : class_names) {
	input_file_contents += class_name + std::string("\n");
	}
	std::string output_file_contents;
	ASSERT_TRUE(CreateAndDump(input_file_contents, &output_file_contents));
	std::string expected_contents("");
	ASSERT_EQ(output_file_contents, expected_contents);
	}

	} // namespace art