runtime/arch/instruction_set_features_test.cc - LeafOS-Project/android_art - Gitiles

 /*
  * Copyright (C) 2014 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 <array>

 #include "common_runtime_test.h"
 #include "instruction_set_features.h"

 #include <gtest/gtest.h>

 #ifdef ART_TARGET_ANDROID
 #include <android-base/properties.h>
 #endif

 #include <android-base/logging.h>
 #include <android-base/stringprintf.h>

 namespace art HIDDEN {

 #ifdef ART_TARGET_ANDROID

 using android::base::StringPrintf;

 #if defined(__aarch64__)
 TEST(InstructionSetFeaturesTest, DISABLED_FeaturesFromSystemPropertyVariant) {
   LOG(WARNING) << "Test disabled due to no CPP define for A53 erratum 835769";
 #else
 TEST(InstructionSetFeaturesTest, FeaturesFromSystemPropertyVariant) {
 #endif
   if (kIsTargetBuild) {
     // atest differs in build-time and run-time features.
     TEST_DISABLED_FOR_X86();
     TEST_DISABLED_FOR_X86_64();
   }

   // Take the default set of instruction features from the build.
   std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
       InstructionSetFeatures::FromCppDefines());

   // Read the variant property.
   std::string key = StringPrintf("dalvik.vm.isa.%s.variant", GetInstructionSetString(kRuntimeISA));
   std::string dex2oat_isa_variant = android::base::GetProperty(key, "");
   if (!dex2oat_isa_variant.empty()) {
     // Use features from property to build InstructionSetFeatures and check against build's
     // features.
     std::string error_msg;
     std::unique_ptr<const InstructionSetFeatures> property_features(
         InstructionSetFeatures::FromVariant(kRuntimeISA, dex2oat_isa_variant, &error_msg));
     ASSERT_TRUE(property_features.get() != nullptr) << error_msg;

     EXPECT_TRUE(property_features->HasAtLeast(instruction_set_features.get()))
       << "System property features: " << *property_features.get()
       << "\nFeatures from build: " << *instruction_set_features.get();
   }
 }

 #if defined(__aarch64__)
 TEST(InstructionSetFeaturesTest, DISABLED_FeaturesFromSystemPropertyString) {
   LOG(WARNING) << "Test disabled due to no CPP define for A53 erratum 835769";
 #else
 TEST(InstructionSetFeaturesTest, FeaturesFromSystemPropertyString) {
 #endif
   if (kIsTargetBuild) {
     // atest differs in build-time and run-time features.
     TEST_DISABLED_FOR_X86();
     TEST_DISABLED_FOR_X86_64();
   }

   // Take the default set of instruction features from the build.
   std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
       InstructionSetFeatures::FromCppDefines());

   // Read the variant property.
   std::string variant_key = StringPrintf("dalvik.vm.isa.%s.variant",
                                          GetInstructionSetString(kRuntimeISA));
   std::string dex2oat_isa_variant = android::base::GetProperty(variant_key, "");
   if (!dex2oat_isa_variant.empty()) {
     // Read the features property.
     std::string features_key = StringPrintf("dalvik.vm.isa.%s.features",
                                             GetInstructionSetString(kRuntimeISA));
     std::string dex2oat_isa_features = android::base::GetProperty(features_key, "");
     if (!dex2oat_isa_features.empty()) {
       // Use features from property to build InstructionSetFeatures and check against build's
       // features.
       std::string error_msg;
       std::unique_ptr<const InstructionSetFeatures> base_features(
           InstructionSetFeatures::FromVariant(kRuntimeISA, dex2oat_isa_variant, &error_msg));
       ASSERT_TRUE(base_features.get() != nullptr) << error_msg;

       std::unique_ptr<const InstructionSetFeatures> property_features(
           base_features->AddFeaturesFromString(dex2oat_isa_features, &error_msg));
       ASSERT_TRUE(property_features.get() != nullptr) << error_msg;

       EXPECT_TRUE(property_features->HasAtLeast(instruction_set_features.get()))
       << "System property features: " << *property_features.get()
       << "\nFeatures from build: " << *instruction_set_features.get();
     }
   }
 }

 #if defined(__arm__)
 TEST(InstructionSetFeaturesTest, DISABLED_FeaturesFromCpuInfo) {
   LOG(WARNING) << "Test disabled due to buggy ARM kernels";
 #else
 TEST(InstructionSetFeaturesTest, FeaturesFromCpuInfo) {
 #endif
   // Take the default set of instruction features from the build.
   std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
       InstructionSetFeatures::FromCppDefines());

   // Check we get the same instruction set features using /proc/cpuinfo.
   std::unique_ptr<const InstructionSetFeatures> cpuinfo_features(
       InstructionSetFeatures::FromCpuInfo());
   EXPECT_TRUE(cpuinfo_features->HasAtLeast(instruction_set_features.get()))
       << "CPU Info features: " << *cpuinfo_features.get()
       << "\nFeatures from build: " << *instruction_set_features.get();
 }
 #endif

 #ifndef ART_TARGET_ANDROID
 TEST(InstructionSetFeaturesTest, HostFeaturesFromCppDefines) {
   std::string error_msg;
   std::unique_ptr<const InstructionSetFeatures> default_features(
       InstructionSetFeatures::FromVariant(kRuntimeISA, "default", &error_msg));
   ASSERT_TRUE(error_msg.empty());

   std::unique_ptr<const InstructionSetFeatures> cpp_features(
       InstructionSetFeatures::FromCppDefines());
   EXPECT_TRUE(cpp_features->HasAtLeast(default_features.get()))
       << "Default variant features: " << *default_features.get()
       << "\nFeatures from build: " << *cpp_features.get();
 }
 #endif

 #if defined(__arm__)
 TEST(InstructionSetFeaturesTest, DISABLED_FeaturesFromHwcap) {
   LOG(WARNING) << "Test disabled due to buggy ARM kernels";
 #else
 TEST(InstructionSetFeaturesTest, FeaturesFromHwcap) {
 #endif
   // Take the default set of instruction features from the build.
   std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
       InstructionSetFeatures::FromCppDefines());

   // Check we get the same instruction set features using AT_HWCAP.
   std::unique_ptr<const InstructionSetFeatures> hwcap_features(
       InstructionSetFeatures::FromHwcap());
   EXPECT_TRUE(hwcap_features->HasAtLeast(instruction_set_features.get()))
       << "Hwcap features: " << *hwcap_features.get()
       << "\nFeatures from build: " << *instruction_set_features.get();
 }

 TEST(InstructionSetFeaturesTest, FeaturesFromAssembly) {
   // Take the default set of instruction features from the build.
   std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
       InstructionSetFeatures::FromCppDefines());

   // Check we get the same instruction set features using assembly tests.
   std::unique_ptr<const InstructionSetFeatures> assembly_features(
       InstructionSetFeatures::FromAssembly());
   EXPECT_TRUE(assembly_features->HasAtLeast(instruction_set_features.get()))
       << "Assembly features: " << *assembly_features.get()
       << "\nFeatures from build: " << *instruction_set_features.get();
 }

 TEST(InstructionSetFeaturesTest, FeaturestFromCpuFeatures) {
   // Take the default set of instruction features from the build.
   std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
       InstructionSetFeatures::FromCppDefines());

   // Check we get the same instruction set features using the cpu_features library
   std::unique_ptr<const InstructionSetFeatures> library_features(
       InstructionSetFeatures::FromCpuFeatures());

   EXPECT_TRUE(library_features->HasAtLeast(instruction_set_features.get()))
       << "Library features: " << *library_features.get()
       << "\nFeatures from build: " << *instruction_set_features.get();
 }

 TEST(InstructionSetFeaturesTest, FeaturesFromRuntimeDetection) {
   if (!InstructionSetFeatures::IsRuntimeDetectionSupported()) {
     EXPECT_EQ(InstructionSetFeatures::FromRuntimeDetection(), nullptr);
   }
 }

 // The instruction set feature string must not contain 'default' together with
 // other feature names.
 //
 // Test that InstructionSetFeatures::AddFeaturesFromString returns nullptr and
 // an error is reported when the value 'default' is specified together
 // with other feature names in an instruction set feature string.
 TEST(InstructionSetFeaturesTest, AddFeaturesFromStringWithDefaultAndOtherNames) {
   std::unique_ptr<const InstructionSetFeatures> cpp_defined_features(
       InstructionSetFeatures::FromCppDefines());
   std::vector<std::string> invalid_feature_strings = {
     "a,default",
     "default,a",
     "a,default,b",
     "a,b,default",
     "default,a,b,c",
     "a,b,default,c,d",
     "a, default ",
     " default , a",
     "a, default , b",
     "default,runtime"
   };

   for (const std::string& invalid_feature_string : invalid_feature_strings) {
     std::string error_msg;
     EXPECT_EQ(cpp_defined_features->AddFeaturesFromString(invalid_feature_string, &error_msg),
               nullptr) << " Invalid feature string: '" << invalid_feature_string << "'";
     EXPECT_EQ(error_msg,
               "Specific instruction set feature(s) cannot be used when 'default' is used.");
   }
 }

 // The instruction set feature string must not contain 'runtime' together with
 // other feature names.
 //
 // Test that InstructionSetFeatures::AddFeaturesFromString returns nullptr and
 // an error is reported when the value 'runtime' is specified together
 // with other feature names in an instruction set feature string.
 TEST(InstructionSetFeaturesTest, AddFeaturesFromStringWithRuntimeAndOtherNames) {
   std::unique_ptr<const InstructionSetFeatures> cpp_defined_features(
       InstructionSetFeatures::FromCppDefines());
   std::vector<std::string> invalid_feature_strings = {
     "a,runtime",
     "runtime,a",
     "a,runtime,b",
     "a,b,runtime",
     "runtime,a,b,c",
     "a,b,runtime,c,d",
     "a, runtime ",
     " runtime , a",
     "a, runtime , b",
     "runtime,default"
   };

   for (const std::string& invalid_feature_string : invalid_feature_strings) {
     std::string error_msg;
     EXPECT_EQ(cpp_defined_features->AddFeaturesFromString(invalid_feature_string, &error_msg),
               nullptr) << " Invalid feature string: '" << invalid_feature_string << "'";
     EXPECT_EQ(error_msg,
               "Specific instruction set feature(s) cannot be used when 'runtime' is used.");
   }
 }

 // Spaces and multiple commas are ignores in a instruction set feature string.
 //
 // Test that a use of spaces and multiple commas with 'default' and 'runtime'
 // does not cause errors.
 TEST(InstructionSetFeaturesTest, AddFeaturesFromValidStringContainingDefaultOrRuntime) {
   std::unique_ptr<const InstructionSetFeatures> cpp_defined_features(
       InstructionSetFeatures::FromCppDefines());
   std::vector<std::string> valid_feature_strings = {
     "default",
     ",,,default",
     "default,,,,",
     ",,,default,,,,",
     "default, , , ",
     " , , ,default",
     " , , ,default, , , ",
     " default , , , ",
     ",,,runtime",
     "runtime,,,,",
     ",,,runtime,,,,",
     "runtime, , , ",
     " , , ,runtime",
     " , , ,runtime, , , ",
     " runtime , , , "
   };
   for (const std::string& valid_feature_string : valid_feature_strings) {
     std::string error_msg;
     EXPECT_NE(cpp_defined_features->AddFeaturesFromString(valid_feature_string, &error_msg),
               nullptr) << " Valid feature string: '" << valid_feature_string << "'";
     EXPECT_TRUE(error_msg.empty()) << error_msg;
   }
 }

 // Spaces and multiple commas are ignores in a instruction set feature string.
 //
 // Test that a use of spaces and multiple commas without any feature names
 // causes errors.
 TEST(InstructionSetFeaturesTest, AddFeaturesFromInvalidStringWithoutFeatureNames) {
   std::unique_ptr<const InstructionSetFeatures> cpp_defined_features(
       InstructionSetFeatures::FromCppDefines());
   std::vector<std::string> invalid_feature_strings = {
     " ",
     "       ",
     ",",
     ",,",
     " , , ,,,,,,",
     "\t",
     "  \t     ",
     ",",
     ",,",
     " , , ,,,,,,"
   };
   for (const std::string& invalid_feature_string : invalid_feature_strings) {
     std::string error_msg;
     EXPECT_EQ(cpp_defined_features->AddFeaturesFromString(invalid_feature_string, &error_msg),
               nullptr) << " Invalid feature string: '" << invalid_feature_string << "'";
     EXPECT_EQ(error_msg, "No instruction set features specified");
   }
 }

 TEST(InstructionSetFeaturesTest, AddFeaturesFromStringRuntime) {
   std::unique_ptr<const InstructionSetFeatures> cpp_defined_features(
       InstructionSetFeatures::FromCppDefines());
   std::string error_msg;

   const std::unique_ptr<const InstructionSetFeatures> features =
       cpp_defined_features->AddFeaturesFromString("runtime", &error_msg);
   EXPECT_NE(features, nullptr);
   EXPECT_TRUE(error_msg.empty()) << error_msg;
   if (!InstructionSetFeatures::IsRuntimeDetectionSupported()) {
     EXPECT_TRUE(features->Equals(cpp_defined_features.get()));
   }
 }

 }  // namespace art
	/*
	* Copyright (C) 2014 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 <array>

	#include "common_runtime_test.h"
	#include "instruction_set_features.h"

	#include <gtest/gtest.h>

	#ifdef ART_TARGET_ANDROID
	#include <android-base/properties.h>
	#endif

	#include <android-base/logging.h>
	#include <android-base/stringprintf.h>

	namespace art HIDDEN {

	#ifdef ART_TARGET_ANDROID

	using android::base::StringPrintf;

	#if defined(__aarch64__)
	TEST(InstructionSetFeaturesTest, DISABLED_FeaturesFromSystemPropertyVariant) {
	LOG(WARNING) << "Test disabled due to no CPP define for A53 erratum 835769";
	#else
	TEST(InstructionSetFeaturesTest, FeaturesFromSystemPropertyVariant) {
	#endif
	if (kIsTargetBuild) {
	// atest differs in build-time and run-time features.
	TEST_DISABLED_FOR_X86();
	TEST_DISABLED_FOR_X86_64();
	}

	// Take the default set of instruction features from the build.
	std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
	InstructionSetFeatures::FromCppDefines());

	// Read the variant property.
	std::string key = StringPrintf("dalvik.vm.isa.%s.variant", GetInstructionSetString(kRuntimeISA));
	std::string dex2oat_isa_variant = android::base::GetProperty(key, "");
	if (!dex2oat_isa_variant.empty()) {
	// Use features from property to build InstructionSetFeatures and check against build's
	// features.
	std::string error_msg;
	std::unique_ptr<const InstructionSetFeatures> property_features(
	InstructionSetFeatures::FromVariant(kRuntimeISA, dex2oat_isa_variant, &error_msg));
	ASSERT_TRUE(property_features.get() != nullptr) << error_msg;

	EXPECT_TRUE(property_features->HasAtLeast(instruction_set_features.get()))
	<< "System property features: " << *property_features.get()
	<< "\nFeatures from build: " << *instruction_set_features.get();
	}
	}

	#if defined(__aarch64__)
	TEST(InstructionSetFeaturesTest, DISABLED_FeaturesFromSystemPropertyString) {
	LOG(WARNING) << "Test disabled due to no CPP define for A53 erratum 835769";
	#else
	TEST(InstructionSetFeaturesTest, FeaturesFromSystemPropertyString) {
	#endif
	if (kIsTargetBuild) {
	// atest differs in build-time and run-time features.
	TEST_DISABLED_FOR_X86();
	TEST_DISABLED_FOR_X86_64();
	}

	// Take the default set of instruction features from the build.
	std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
	InstructionSetFeatures::FromCppDefines());

	// Read the variant property.
	std::string variant_key = StringPrintf("dalvik.vm.isa.%s.variant",
	GetInstructionSetString(kRuntimeISA));
	std::string dex2oat_isa_variant = android::base::GetProperty(variant_key, "");
	if (!dex2oat_isa_variant.empty()) {
	// Read the features property.
	std::string features_key = StringPrintf("dalvik.vm.isa.%s.features",
	GetInstructionSetString(kRuntimeISA));
	std::string dex2oat_isa_features = android::base::GetProperty(features_key, "");
	if (!dex2oat_isa_features.empty()) {
	// Use features from property to build InstructionSetFeatures and check against build's
	// features.
	std::string error_msg;
	std::unique_ptr<const InstructionSetFeatures> base_features(
	InstructionSetFeatures::FromVariant(kRuntimeISA, dex2oat_isa_variant, &error_msg));
	ASSERT_TRUE(base_features.get() != nullptr) << error_msg;

	std::unique_ptr<const InstructionSetFeatures> property_features(
	base_features->AddFeaturesFromString(dex2oat_isa_features, &error_msg));
	ASSERT_TRUE(property_features.get() != nullptr) << error_msg;

	EXPECT_TRUE(property_features->HasAtLeast(instruction_set_features.get()))
	<< "System property features: " << *property_features.get()
	<< "\nFeatures from build: " << *instruction_set_features.get();
	}
	}
	}

	#if defined(__arm__)
	TEST(InstructionSetFeaturesTest, DISABLED_FeaturesFromCpuInfo) {
	LOG(WARNING) << "Test disabled due to buggy ARM kernels";
	#else
	TEST(InstructionSetFeaturesTest, FeaturesFromCpuInfo) {
	#endif
	// Take the default set of instruction features from the build.
	std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
	InstructionSetFeatures::FromCppDefines());

	// Check we get the same instruction set features using /proc/cpuinfo.
	std::unique_ptr<const InstructionSetFeatures> cpuinfo_features(
	InstructionSetFeatures::FromCpuInfo());
	EXPECT_TRUE(cpuinfo_features->HasAtLeast(instruction_set_features.get()))
	<< "CPU Info features: " << *cpuinfo_features.get()
	<< "\nFeatures from build: " << *instruction_set_features.get();
	}
	#endif

	#ifndef ART_TARGET_ANDROID
	TEST(InstructionSetFeaturesTest, HostFeaturesFromCppDefines) {
	std::string error_msg;
	std::unique_ptr<const InstructionSetFeatures> default_features(
	InstructionSetFeatures::FromVariant(kRuntimeISA, "default", &error_msg));
	ASSERT_TRUE(error_msg.empty());

	std::unique_ptr<const InstructionSetFeatures> cpp_features(
	InstructionSetFeatures::FromCppDefines());
	EXPECT_TRUE(cpp_features->HasAtLeast(default_features.get()))
	<< "Default variant features: " << *default_features.get()
	<< "\nFeatures from build: " << *cpp_features.get();
	}
	#endif

	#if defined(__arm__)
	TEST(InstructionSetFeaturesTest, DISABLED_FeaturesFromHwcap) {
	LOG(WARNING) << "Test disabled due to buggy ARM kernels";
	#else
	TEST(InstructionSetFeaturesTest, FeaturesFromHwcap) {
	#endif
	// Take the default set of instruction features from the build.
	std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
	InstructionSetFeatures::FromCppDefines());

	// Check we get the same instruction set features using AT_HWCAP.
	std::unique_ptr<const InstructionSetFeatures> hwcap_features(
	InstructionSetFeatures::FromHwcap());
	EXPECT_TRUE(hwcap_features->HasAtLeast(instruction_set_features.get()))
	<< "Hwcap features: " << *hwcap_features.get()
	<< "\nFeatures from build: " << *instruction_set_features.get();
	}

	TEST(InstructionSetFeaturesTest, FeaturesFromAssembly) {
	// Take the default set of instruction features from the build.
	std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
	InstructionSetFeatures::FromCppDefines());

	// Check we get the same instruction set features using assembly tests.
	std::unique_ptr<const InstructionSetFeatures> assembly_features(
	InstructionSetFeatures::FromAssembly());
	EXPECT_TRUE(assembly_features->HasAtLeast(instruction_set_features.get()))
	<< "Assembly features: " << *assembly_features.get()
	<< "\nFeatures from build: " << *instruction_set_features.get();
	}

	TEST(InstructionSetFeaturesTest, FeaturestFromCpuFeatures) {
	// Take the default set of instruction features from the build.
	std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
	InstructionSetFeatures::FromCppDefines());

	// Check we get the same instruction set features using the cpu_features library
	std::unique_ptr<const InstructionSetFeatures> library_features(
	InstructionSetFeatures::FromCpuFeatures());

	EXPECT_TRUE(library_features->HasAtLeast(instruction_set_features.get()))
	<< "Library features: " << *library_features.get()
	<< "\nFeatures from build: " << *instruction_set_features.get();
	}

	TEST(InstructionSetFeaturesTest, FeaturesFromRuntimeDetection) {
	if (!InstructionSetFeatures::IsRuntimeDetectionSupported()) {
	EXPECT_EQ(InstructionSetFeatures::FromRuntimeDetection(), nullptr);
	}
	}

	// The instruction set feature string must not contain 'default' together with
	// other feature names.
	//
	// Test that InstructionSetFeatures::AddFeaturesFromString returns nullptr and
	// an error is reported when the value 'default' is specified together
	// with other feature names in an instruction set feature string.
	TEST(InstructionSetFeaturesTest, AddFeaturesFromStringWithDefaultAndOtherNames) {
	std::unique_ptr<const InstructionSetFeatures> cpp_defined_features(
	InstructionSetFeatures::FromCppDefines());
	std::vector<std::string> invalid_feature_strings = {
	"a,default",
	"default,a",
	"a,default,b",
	"a,b,default",
	"default,a,b,c",
	"a,b,default,c,d",
	"a, default ",
	" default , a",
	"a, default , b",
	"default,runtime"
	};

	for (const std::string& invalid_feature_string : invalid_feature_strings) {
	std::string error_msg;
	EXPECT_EQ(cpp_defined_features->AddFeaturesFromString(invalid_feature_string, &error_msg),
	nullptr) << " Invalid feature string: '" << invalid_feature_string << "'";
	EXPECT_EQ(error_msg,
	"Specific instruction set feature(s) cannot be used when 'default' is used.");
	}
	}

	// The instruction set feature string must not contain 'runtime' together with
	// other feature names.
	//
	// Test that InstructionSetFeatures::AddFeaturesFromString returns nullptr and
	// an error is reported when the value 'runtime' is specified together
	// with other feature names in an instruction set feature string.
	TEST(InstructionSetFeaturesTest, AddFeaturesFromStringWithRuntimeAndOtherNames) {
	std::unique_ptr<const InstructionSetFeatures> cpp_defined_features(
	InstructionSetFeatures::FromCppDefines());
	std::vector<std::string> invalid_feature_strings = {
	"a,runtime",
	"runtime,a",
	"a,runtime,b",
	"a,b,runtime",
	"runtime,a,b,c",
	"a,b,runtime,c,d",
	"a, runtime ",
	" runtime , a",
	"a, runtime , b",
	"runtime,default"
	};

	for (const std::string& invalid_feature_string : invalid_feature_strings) {
	std::string error_msg;
	EXPECT_EQ(cpp_defined_features->AddFeaturesFromString(invalid_feature_string, &error_msg),
	nullptr) << " Invalid feature string: '" << invalid_feature_string << "'";
	EXPECT_EQ(error_msg,
	"Specific instruction set feature(s) cannot be used when 'runtime' is used.");
	}
	}

	// Spaces and multiple commas are ignores in a instruction set feature string.
	//
	// Test that a use of spaces and multiple commas with 'default' and 'runtime'
	// does not cause errors.
	TEST(InstructionSetFeaturesTest, AddFeaturesFromValidStringContainingDefaultOrRuntime) {
	std::unique_ptr<const InstructionSetFeatures> cpp_defined_features(
	InstructionSetFeatures::FromCppDefines());
	std::vector<std::string> valid_feature_strings = {
	"default",
	",,,default",
	"default,,,,",
	",,,default,,,,",
	"default, , , ",
	" , , ,default",
	" , , ,default, , , ",
	" default , , , ",
	",,,runtime",
	"runtime,,,,",
	",,,runtime,,,,",
	"runtime, , , ",
	" , , ,runtime",
	" , , ,runtime, , , ",
	" runtime , , , "
	};
	for (const std::string& valid_feature_string : valid_feature_strings) {
	std::string error_msg;
	EXPECT_NE(cpp_defined_features->AddFeaturesFromString(valid_feature_string, &error_msg),
	nullptr) << " Valid feature string: '" << valid_feature_string << "'";
	EXPECT_TRUE(error_msg.empty()) << error_msg;
	}
	}

	// Spaces and multiple commas are ignores in a instruction set feature string.
	//
	// Test that a use of spaces and multiple commas without any feature names
	// causes errors.
	TEST(InstructionSetFeaturesTest, AddFeaturesFromInvalidStringWithoutFeatureNames) {
	std::unique_ptr<const InstructionSetFeatures> cpp_defined_features(
	InstructionSetFeatures::FromCppDefines());
	std::vector<std::string> invalid_feature_strings = {
	" ",
	" ",
	",",
	",,",
	" , , ,,,,,,",
	"\t",
	" \t ",
	",",
	",,",
	" , , ,,,,,,"
	};
	for (const std::string& invalid_feature_string : invalid_feature_strings) {
	std::string error_msg;
	EXPECT_EQ(cpp_defined_features->AddFeaturesFromString(invalid_feature_string, &error_msg),
	nullptr) << " Invalid feature string: '" << invalid_feature_string << "'";
	EXPECT_EQ(error_msg, "No instruction set features specified");
	}
	}

	TEST(InstructionSetFeaturesTest, AddFeaturesFromStringRuntime) {
	std::unique_ptr<const InstructionSetFeatures> cpp_defined_features(
	InstructionSetFeatures::FromCppDefines());
	std::string error_msg;

	const std::unique_ptr<const InstructionSetFeatures> features =
	cpp_defined_features->AddFeaturesFromString("runtime", &error_msg);
	EXPECT_NE(features, nullptr);
	EXPECT_TRUE(error_msg.empty()) << error_msg;
	if (!InstructionSetFeatures::IsRuntimeDetectionSupported()) {
	EXPECT_TRUE(features->Equals(cpp_defined_features.get()));
	}
	}

	} // namespace art