libartbase/base/file_utils_test.cc - LeafOS-Project/android_art - Gitiles

 /*
  * Copyright (C) 2011 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 "base/file_utils.h"

 #include <libgen.h>
 #include <stdlib.h>

 #include <optional>
 #include <vector>

 #include "base/stl_util.h"
 #include "common_art_test.h"

 namespace art {

 static constexpr const char kAndroidWifiApexDefaultPath[] = "/apex/com.android.wifi";

 namespace {
 class ScopedOverrideDalvikCacheSubDirectory {
  public:
   explicit ScopedOverrideDalvikCacheSubDirectory(const char* override) {
     OverrideDalvikCacheSubDirectory(override);
   }

   ~ScopedOverrideDalvikCacheSubDirectory() { OverrideDalvikCacheSubDirectory("dalvik-cache"); }

  private:
   DISALLOW_COPY_AND_ASSIGN(ScopedOverrideDalvikCacheSubDirectory);
 };
 }  // namespace

 class FileUtilsTest : public CommonArtTest {};

 TEST_F(FileUtilsTest, GetDalvikCacheFilename) {
   std::string name;
   std::string error;

   EXPECT_TRUE(GetDalvikCacheFilename("/system/app/Foo.apk", "/foo", &name, &error)) << error;
   EXPECT_EQ("/foo/system@app@Foo.apk@classes.dex", name);

   EXPECT_TRUE(GetDalvikCacheFilename("/data/app/foo-1.apk", "/foo", &name, &error)) << error;
   EXPECT_EQ("/foo/data@app@foo-1.apk@classes.dex", name);

   EXPECT_TRUE(GetDalvikCacheFilename("/system/framework/core.jar", "/foo", &name, &error)) << error;
   EXPECT_EQ("/foo/system@framework@core.jar@classes.dex", name);

   EXPECT_TRUE(GetDalvikCacheFilename("/system/framework/boot.art", "/foo", &name, &error)) << error;
   EXPECT_EQ("/foo/system@framework@boot.art", name);

   EXPECT_TRUE(GetDalvikCacheFilename("/system/framework/boot.oat", "/foo", &name, &error)) << error;
   EXPECT_EQ("/foo/system@framework@boot.oat", name);
 }

 TEST_F(FileUtilsTest, GetSystemImageFilename) {
   EXPECT_STREQ("/system/framework/arm/boot.art",
                GetSystemImageFilename("/system/framework/boot.art", InstructionSet::kArm).c_str());
 }

 // TODO(dsrbecky): b/160885380: This test is failing in eng-prod because libartbase
 //                              is loaded from different path (under testcases).
 TEST_F(FileUtilsTest, DISABLED_GetAndroidRootSafe) {
   std::string error_msg;

   // We don't expect null returns for most cases, so don't check and let std::string crash.

   // CommonArtTest sets ANDROID_ROOT, so expect this to be the same.
   std::string android_root = GetAndroidRootSafe(&error_msg);
   std::string android_root_env = getenv("ANDROID_ROOT");
   EXPECT_EQ(android_root, android_root_env) << error_msg;

   // Set ANDROID_ROOT to something else (but the directory must exist). So use dirname.
   UniqueCPtr<char> root_dup(strdup(android_root_env.c_str()));
   char* dir = dirname(root_dup.get());
   ASSERT_EQ(0, setenv("ANDROID_ROOT", dir, /* overwrite */ 1));
   std::string android_root2 = GetAndroidRootSafe(&error_msg);
   EXPECT_STREQ(dir, android_root2.c_str()) << error_msg;

   // Set a bogus value for ANDROID_ROOT. This should be an error.
   ASSERT_EQ(0, setenv("ANDROID_ROOT", "/this/is/obviously/bogus", /* overwrite */ 1));
   EXPECT_EQ(GetAndroidRootSafe(&error_msg), "");
   error_msg = "";

   // Inferring the Android Root from the location of libartbase only works on host.
   if (!kIsTargetBuild) {
     // Unset ANDROID_ROOT and see that it still returns something (as libartbase code is running).
     ASSERT_EQ(0, unsetenv("ANDROID_ROOT"));
     std::string android_root3 = GetAndroidRootSafe(&error_msg);
     // This should be the same as the other root (modulo realpath), otherwise the test setup is
     // broken. On non-bionic. On bionic we can be running with a different libartbase that lives
     // outside of ANDROID_ROOT.
     UniqueCPtr<char> real_root3(realpath(android_root3.c_str(), nullptr));
 #if !defined(__BIONIC__) || defined(__ANDROID__)
     UniqueCPtr<char> real_root(realpath(android_root.c_str(), nullptr));
     EXPECT_STREQ(real_root.get(), real_root3.get()) << error_msg;
 #else
     EXPECT_STRNE(real_root3.get(), "") << error_msg;
 #endif
   }

   // Reset ANDROID_ROOT, as other things may depend on it.
   ASSERT_EQ(0, setenv("ANDROID_ROOT", android_root_env.c_str(), /* overwrite */ 1));
 }

 TEST_F(FileUtilsTest, GetArtRootSafe) {
   std::string error_msg;
   std::string android_art_root;
   std::string android_art_root_env;

   // TODO(b/130295968): Re-enable this part when the directory exists on host
   if (kIsTargetBuild) {
     // We don't expect null returns for most cases, so don't check and let std::string crash.

     // CommonArtTest sets ANDROID_ART_ROOT, so expect this to be the same.
     android_art_root = GetArtRootSafe(&error_msg);
     android_art_root_env = getenv("ANDROID_ART_ROOT");
     EXPECT_EQ(android_art_root, android_art_root_env) << error_msg;

     // Set ANDROID_ART_ROOT to something else (but the directory must exist). So use dirname.
     UniqueCPtr<char> root_dup(strdup(android_art_root_env.c_str()));
     char* dir = dirname(root_dup.get());
     ASSERT_EQ(0, setenv("ANDROID_ART_ROOT", dir, /* overwrite */ 1));
     std::string android_art_root2 = GetArtRootSafe(&error_msg);
     EXPECT_STREQ(dir, android_art_root2.c_str()) << error_msg;
   }

   // Set a bogus value for ANDROID_ART_ROOT. This should be an error.
   ASSERT_EQ(0, setenv("ANDROID_ART_ROOT", "/this/is/obviously/bogus", /* overwrite */ 1));
   EXPECT_EQ(GetArtRootSafe(&error_msg), "");

   // Inferring the ART root from the location of libartbase only works on target.
   if (kIsTargetBuild) {
     // Disabled for now, as we cannot reliably use `GetRootContainingLibartbase`
     // to find the ART root on target yet (see comment in `GetArtRootSafe`).
     //
     // TODO(b/129534335): Re-enable this part of the test on target when the
     // only instance of libartbase is the one from the ART APEX.
     if ((false)) {
       // Unset ANDROID_ART_ROOT and see that it still returns something (as
       // libartbase code is running).
       ASSERT_EQ(0, unsetenv("ANDROID_ART_ROOT"));
       std::string android_art_root3 = GetArtRootSafe(&error_msg);
       // This should be the same as the other root (modulo realpath), otherwise
       // the test setup is broken. On non-bionic. On bionic we can be running
       // with a different libartbase that lives outside of ANDROID_ART_ROOT.
       UniqueCPtr<char> real_root3(realpath(android_art_root3.c_str(), nullptr));
 #if !defined(__BIONIC__) || defined(__ANDROID__)
       UniqueCPtr<char> real_root(realpath(android_art_root.c_str(), nullptr));
       EXPECT_STREQ(real_root.get(), real_root3.get()) << error_msg;
 #else
       EXPECT_STRNE(real_root3.get(), "") << error_msg;
 #endif
     }
   }

   // Reset ANDROID_ART_ROOT, as other things may depend on it.
   ASSERT_EQ(0, setenv("ANDROID_ART_ROOT", android_art_root_env.c_str(), /* overwrite */ 1));
 }

 TEST_F(FileUtilsTest, ReplaceFileExtension) {
   EXPECT_EQ("/directory/file.vdex", ReplaceFileExtension("/directory/file.oat", "vdex"));
   EXPECT_EQ("/.directory/file.vdex", ReplaceFileExtension("/.directory/file.oat", "vdex"));
   EXPECT_EQ("/directory/file.vdex", ReplaceFileExtension("/directory/file", "vdex"));
   EXPECT_EQ("/.directory/file.vdex", ReplaceFileExtension("/.directory/file", "vdex"));
 }

 TEST_F(FileUtilsTest, ArtApexDataPath) {
   ScopedUnsetEnvironmentVariable no_env("ART_APEX_DATA");
   EXPECT_EQ(kArtApexDataDefaultPath, GetArtApexData());

   setenv("ART_APEX_DATA", "/path/from/env", /* overwrite */ 1);
   EXPECT_EQ("/path/from/env", GetArtApexData());
 }

 TEST_F(FileUtilsTest, GetApexDataOatFilename) {
   ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");
   ScopedUnsetEnvironmentVariable i18n_root("ANDROID_I18N_ROOT");
   ScopedUnsetEnvironmentVariable art_apex_data("ART_APEX_DATA");

   EXPECT_EQ(GetArtApexData() + "/dalvik-cache/arm/boot-beep.oat",
             GetApexDataOatFilename("/product/javalib/beep.jar", InstructionSet::kArm));

   const std::string art_apex_jar = std::string {kAndroidArtApexDefaultPath} + "/javalib/some.jar";
   EXPECT_EQ(std::string{}, GetApexDataOatFilename(art_apex_jar, InstructionSet::kArm));

   const std::string i18n_jar = std::string{kAndroidI18nApexDefaultPath} + "/javalib/core-icu4j.jar";
   EXPECT_EQ(std::string{}, GetApexDataOatFilename(i18n_jar, InstructionSet::kArm));

   const std::string system_jar_apexdata_oat = GetArtApexData() + "/dalvik-cache/x86/boot-lace.oat";
   EXPECT_EQ(system_jar_apexdata_oat,
             GetApexDataOatFilename("/system/framework/lace.jar", InstructionSet::kX86));
 }

 TEST_F(FileUtilsTest, GetApexDataOdexFilename) {
   ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");
   ScopedUnsetEnvironmentVariable art_apex_data("ART_APEX_DATA");

   EXPECT_EQ(GetArtApexData() + "/dalvik-cache/arm/data@some@code.odex",
             GetApexDataOdexFilename("/data/some/code.dex", InstructionSet::kArm));

   const std::string art_apex_jar = std::string {kAndroidArtApexDefaultPath} + "/javalib/some.jar";
   EXPECT_EQ(
       GetArtApexData() + "/dalvik-cache/arm/apex@com.android.art@javalib@some.jar@classes.odex",
       GetApexDataOdexFilename(art_apex_jar, InstructionSet::kArm));

   const std::string i18n_jar = std::string{kAndroidI18nApexDefaultPath} + "/javalib/core-icu4j.jar";
   EXPECT_EQ(GetArtApexData() +
                 "/dalvik-cache/arm/apex@com.android.i18n@javalib@core-icu4j.jar@classes.odex",
             GetApexDataOdexFilename(i18n_jar, InstructionSet::kArm));

   const std::string system_jar_apexdata_odex =
       GetArtApexData() + "/dalvik-cache/x86/system@framework@cookie.jar@classes.odex";
   EXPECT_EQ(system_jar_apexdata_odex,
             GetApexDataOdexFilename("/system/framework/cookie.jar", InstructionSet::kX86));
 }

 TEST_F(FileUtilsTest, GetApexDataBootImage) {
   ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");
   ScopedUnsetEnvironmentVariable art_apex_data("ART_APEX_DATA");

   EXPECT_EQ(std::string{},
             GetApexDataBootImage(std::string{kAndroidI18nApexDefaultPath} + "/javalib/bar.jar"));

   // Check image location has the prefix "boot-" in front of the basename of dex location and
   // that image suffix is .art.
   const std::string system_jar = "/system/framework/disk.jar";
   const std::string boot_image = GetApexDataBootImage(system_jar);
   EXPECT_EQ(GetArtApexData() + "/dalvik-cache/boot-disk.art", boot_image);

   // Check the image filename corresponds to the oat file for the same system jar.
   const InstructionSet isa = InstructionSet::kArm64;
   const std::string boot_image_filename = GetSystemImageFilename(boot_image.c_str(), isa);
   const std::string accompanying_oat_file = ReplaceFileExtension(boot_image_filename, "oat");
   EXPECT_EQ(accompanying_oat_file, GetApexDataOatFilename(system_jar, isa));
 }

 TEST_F(FileUtilsTest, GetApexDataImage) {
   ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");
   ScopedUnsetEnvironmentVariable art_apex_data("ART_APEX_DATA");

   EXPECT_EQ(
       GetArtApexData() + "/dalvik-cache/apex@com.android.wifi@lib@javalib@bar.jar@classes.art",
       GetApexDataImage(std::string {kAndroidWifiApexDefaultPath} + "/lib/javalib/bar.jar"));

   // Check image has basename of dex location with the .art suffix.
   const char* jar = "/system/framework/mcguffin/test.jar";
   const std::string image = GetApexDataImage(jar);
   EXPECT_EQ(GetArtApexData() + "/dalvik-cache/system@framework@mcguffin@test.jar@classes.art",
             image);

   // Check the image filename corresponds to the .odex file for the same system jar.
   const InstructionSet isa = InstructionSet::kX86_64;
   const std::string image_filename = GetSystemImageFilename(image.c_str(), isa);
   const std::string accompanying_odex_file = ReplaceFileExtension(image_filename, "odex");
   EXPECT_EQ(accompanying_odex_file, GetApexDataOdexFilename(jar, isa));
 }

 TEST_F(FileUtilsTest, GetApexDataDalvikCacheFilename) {
   const std::string apex_jar = std::string {kAndroidWifiApexDefaultPath} + "/lib/javalib/bar.jar";
   EXPECT_EQ(GetArtApexData() +
                 "/dalvik-cache/x86_64/apex@com.android.wifi@lib@javalib@bar.jar@classes.art",
             GetApexDataDalvikCacheFilename(apex_jar, InstructionSet::kX86_64, "art"));

   // Check dalvik-cache filename follows convention.
   const std::string non_apex_jar = "/vendor/javalib/test.jar";
   const std::string art_filename =
       GetApexDataDalvikCacheFilename(non_apex_jar, InstructionSet::kArm, "art");
   CHECK_EQ(GetArtApexData() + "/dalvik-cache/arm/vendor@javalib@test.jar@classes.art",
            art_filename);

   // Check ".art", ".odex" and ".vdex" filenames are the same with the appropriate extensions
   // substituted.
   const std::string odex_filename =
       GetApexDataDalvikCacheFilename(non_apex_jar, InstructionSet::kArm, "odex");
   CHECK_EQ(odex_filename, ReplaceFileExtension(art_filename, "odex"));
   const std::string vdex_filename =
       GetApexDataDalvikCacheFilename(non_apex_jar, InstructionSet::kArm, "vdex");
   CHECK_EQ(vdex_filename, ReplaceFileExtension(art_filename, "vdex"));
 }

 TEST_F(FileUtilsTest, OverrideDalvikCacheSubDirectory) {
   ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");
   ScopedUnsetEnvironmentVariable i18n_root("ANDROID_I18N_ROOT");
   ScopedUnsetEnvironmentVariable art_apex_data("ART_APEX_DATA");

   ScopedOverrideDalvikCacheSubDirectory dalvik_cache("overridden-cache");

   EXPECT_EQ(GetArtApexData() + "/overridden-cache/arm/boot-beep.oat",
             GetApexDataOatFilename("/product/javalib/beep.jar", InstructionSet::kArm));

   EXPECT_EQ(GetArtApexData() + "/overridden-cache/arm/data@some@code.odex",
             GetApexDataOdexFilename("/data/some/code.dex", InstructionSet::kArm));

   const std::string system_jar = "/system/framework/disk.jar";
   const std::string boot_image = GetApexDataBootImage(system_jar);
   EXPECT_EQ(GetArtApexData() + "/overridden-cache/boot-disk.art", boot_image);

   EXPECT_EQ(
       GetArtApexData() + "/overridden-cache/apex@com.android.wifi@lib@javalib@bar.jar@classes.art",
       GetApexDataImage(std::string {kAndroidWifiApexDefaultPath} + "/lib/javalib/bar.jar"));

   const std::string apex_jar = std::string {kAndroidWifiApexDefaultPath} + "/lib/javalib/bar.jar";
   EXPECT_EQ(GetArtApexData() +
                 "/overridden-cache/x86_64/apex@com.android.wifi@lib@javalib@bar.jar@classes.art",
             GetApexDataDalvikCacheFilename(apex_jar, InstructionSet::kX86_64, "art"));
 }

 TEST_F(FileUtilsTest, GetSystemOdexFilenameForApex) {
   ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");

   const std::string apex_jar = std::string {kAndroidArtApexDefaultPath} + "/javalib/some.jar";
   EXPECT_EQ(
       GetAndroidRoot() + "/framework/oat/arm/apex@com.android.art@javalib@some.jar@classes.odex",
       GetSystemOdexFilenameForApex(apex_jar, InstructionSet::kArm));
 }

 TEST_F(FileUtilsTest, ApexNameFromLocation) {
   EXPECT_EQ("", ApexNameFromLocation(""));
   EXPECT_EQ("", ApexNameFromLocation("/apex/com.android.foo"));
   EXPECT_EQ("", ApexNameFromLocation("/apex//something"));
   EXPECT_EQ("com.android.foo", ApexNameFromLocation("/apex/com.android.foo/"));
   EXPECT_EQ("", ApexNameFromLocation("apex/com.android.foo/"));
   EXPECT_EQ("foo", ApexNameFromLocation("/apex/foo/something.jar"));
   EXPECT_EQ("", ApexNameFromLocation("/bar/foo/baz"));
   EXPECT_EQ("", ApexNameFromLocation("/apexx/foo/baz"));
 }

 }  // namespace art
	/*
	* Copyright (C) 2011 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 "base/file_utils.h"

	#include <libgen.h>
	#include <stdlib.h>

	#include <optional>
	#include <vector>

	#include "base/stl_util.h"
	#include "common_art_test.h"

	namespace art {

	static constexpr const char kAndroidWifiApexDefaultPath[] = "/apex/com.android.wifi";

	namespace {
	class ScopedOverrideDalvikCacheSubDirectory {
	public:
	explicit ScopedOverrideDalvikCacheSubDirectory(const char* override) {
	OverrideDalvikCacheSubDirectory(override);
	}

	~ScopedOverrideDalvikCacheSubDirectory() { OverrideDalvikCacheSubDirectory("dalvik-cache"); }

	private:
	DISALLOW_COPY_AND_ASSIGN(ScopedOverrideDalvikCacheSubDirectory);
	};
	} // namespace

	class FileUtilsTest : public CommonArtTest {};

	TEST_F(FileUtilsTest, GetDalvikCacheFilename) {
	std::string name;
	std::string error;

	EXPECT_TRUE(GetDalvikCacheFilename("/system/app/Foo.apk", "/foo", &name, &error)) << error;
	EXPECT_EQ("/foo/system@app@Foo.apk@classes.dex", name);

	EXPECT_TRUE(GetDalvikCacheFilename("/data/app/foo-1.apk", "/foo", &name, &error)) << error;
	EXPECT_EQ("/foo/data@app@foo-1.apk@classes.dex", name);

	EXPECT_TRUE(GetDalvikCacheFilename("/system/framework/core.jar", "/foo", &name, &error)) << error;
	EXPECT_EQ("/foo/system@framework@core.jar@classes.dex", name);

	EXPECT_TRUE(GetDalvikCacheFilename("/system/framework/boot.art", "/foo", &name, &error)) << error;
	EXPECT_EQ("/foo/system@framework@boot.art", name);

	EXPECT_TRUE(GetDalvikCacheFilename("/system/framework/boot.oat", "/foo", &name, &error)) << error;
	EXPECT_EQ("/foo/system@framework@boot.oat", name);
	}

	TEST_F(FileUtilsTest, GetSystemImageFilename) {
	EXPECT_STREQ("/system/framework/arm/boot.art",
	GetSystemImageFilename("/system/framework/boot.art", InstructionSet::kArm).c_str());
	}

	// TODO(dsrbecky): b/160885380: This test is failing in eng-prod because libartbase
	// is loaded from different path (under testcases).
	TEST_F(FileUtilsTest, DISABLED_GetAndroidRootSafe) {
	std::string error_msg;

	// We don't expect null returns for most cases, so don't check and let std::string crash.

	// CommonArtTest sets ANDROID_ROOT, so expect this to be the same.
	std::string android_root = GetAndroidRootSafe(&error_msg);
	std::string android_root_env = getenv("ANDROID_ROOT");
	EXPECT_EQ(android_root, android_root_env) << error_msg;

	// Set ANDROID_ROOT to something else (but the directory must exist). So use dirname.
	UniqueCPtr<char> root_dup(strdup(android_root_env.c_str()));
	char* dir = dirname(root_dup.get());
	ASSERT_EQ(0, setenv("ANDROID_ROOT", dir, /* overwrite */ 1));
	std::string android_root2 = GetAndroidRootSafe(&error_msg);
	EXPECT_STREQ(dir, android_root2.c_str()) << error_msg;

	// Set a bogus value for ANDROID_ROOT. This should be an error.
	ASSERT_EQ(0, setenv("ANDROID_ROOT", "/this/is/obviously/bogus", /* overwrite */ 1));
	EXPECT_EQ(GetAndroidRootSafe(&error_msg), "");
	error_msg = "";

	// Inferring the Android Root from the location of libartbase only works on host.
	if (!kIsTargetBuild) {
	// Unset ANDROID_ROOT and see that it still returns something (as libartbase code is running).
	ASSERT_EQ(0, unsetenv("ANDROID_ROOT"));
	std::string android_root3 = GetAndroidRootSafe(&error_msg);
	// This should be the same as the other root (modulo realpath), otherwise the test setup is
	// broken. On non-bionic. On bionic we can be running with a different libartbase that lives
	// outside of ANDROID_ROOT.
	UniqueCPtr<char> real_root3(realpath(android_root3.c_str(), nullptr));
	#if !defined(__BIONIC__) \|\| defined(__ANDROID__)
	UniqueCPtr<char> real_root(realpath(android_root.c_str(), nullptr));
	EXPECT_STREQ(real_root.get(), real_root3.get()) << error_msg;
	#else
	EXPECT_STRNE(real_root3.get(), "") << error_msg;
	#endif
	}

	// Reset ANDROID_ROOT, as other things may depend on it.
	ASSERT_EQ(0, setenv("ANDROID_ROOT", android_root_env.c_str(), /* overwrite */ 1));
	}

	TEST_F(FileUtilsTest, GetArtRootSafe) {
	std::string error_msg;
	std::string android_art_root;
	std::string android_art_root_env;

	// TODO(b/130295968): Re-enable this part when the directory exists on host
	if (kIsTargetBuild) {
	// We don't expect null returns for most cases, so don't check and let std::string crash.

	// CommonArtTest sets ANDROID_ART_ROOT, so expect this to be the same.
	android_art_root = GetArtRootSafe(&error_msg);
	android_art_root_env = getenv("ANDROID_ART_ROOT");
	EXPECT_EQ(android_art_root, android_art_root_env) << error_msg;

	// Set ANDROID_ART_ROOT to something else (but the directory must exist). So use dirname.
	UniqueCPtr<char> root_dup(strdup(android_art_root_env.c_str()));
	char* dir = dirname(root_dup.get());
	ASSERT_EQ(0, setenv("ANDROID_ART_ROOT", dir, /* overwrite */ 1));
	std::string android_art_root2 = GetArtRootSafe(&error_msg);
	EXPECT_STREQ(dir, android_art_root2.c_str()) << error_msg;
	}

	// Set a bogus value for ANDROID_ART_ROOT. This should be an error.
	ASSERT_EQ(0, setenv("ANDROID_ART_ROOT", "/this/is/obviously/bogus", /* overwrite */ 1));
	EXPECT_EQ(GetArtRootSafe(&error_msg), "");

	// Inferring the ART root from the location of libartbase only works on target.
	if (kIsTargetBuild) {
	// Disabled for now, as we cannot reliably use `GetRootContainingLibartbase`
	// to find the ART root on target yet (see comment in `GetArtRootSafe`).
	//
	// TODO(b/129534335): Re-enable this part of the test on target when the
	// only instance of libartbase is the one from the ART APEX.
	if ((false)) {
	// Unset ANDROID_ART_ROOT and see that it still returns something (as
	// libartbase code is running).
	ASSERT_EQ(0, unsetenv("ANDROID_ART_ROOT"));
	std::string android_art_root3 = GetArtRootSafe(&error_msg);
	// This should be the same as the other root (modulo realpath), otherwise
	// the test setup is broken. On non-bionic. On bionic we can be running
	// with a different libartbase that lives outside of ANDROID_ART_ROOT.
	UniqueCPtr<char> real_root3(realpath(android_art_root3.c_str(), nullptr));
	#if !defined(__BIONIC__) \|\| defined(__ANDROID__)
	UniqueCPtr<char> real_root(realpath(android_art_root.c_str(), nullptr));
	EXPECT_STREQ(real_root.get(), real_root3.get()) << error_msg;
	#else
	EXPECT_STRNE(real_root3.get(), "") << error_msg;
	#endif
	}
	}

	// Reset ANDROID_ART_ROOT, as other things may depend on it.
	ASSERT_EQ(0, setenv("ANDROID_ART_ROOT", android_art_root_env.c_str(), /* overwrite */ 1));
	}

	TEST_F(FileUtilsTest, ReplaceFileExtension) {
	EXPECT_EQ("/directory/file.vdex", ReplaceFileExtension("/directory/file.oat", "vdex"));
	EXPECT_EQ("/.directory/file.vdex", ReplaceFileExtension("/.directory/file.oat", "vdex"));
	EXPECT_EQ("/directory/file.vdex", ReplaceFileExtension("/directory/file", "vdex"));
	EXPECT_EQ("/.directory/file.vdex", ReplaceFileExtension("/.directory/file", "vdex"));
	}

	TEST_F(FileUtilsTest, ArtApexDataPath) {
	ScopedUnsetEnvironmentVariable no_env("ART_APEX_DATA");
	EXPECT_EQ(kArtApexDataDefaultPath, GetArtApexData());

	setenv("ART_APEX_DATA", "/path/from/env", /* overwrite */ 1);
	EXPECT_EQ("/path/from/env", GetArtApexData());
	}

	TEST_F(FileUtilsTest, GetApexDataOatFilename) {
	ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");
	ScopedUnsetEnvironmentVariable i18n_root("ANDROID_I18N_ROOT");
	ScopedUnsetEnvironmentVariable art_apex_data("ART_APEX_DATA");

	EXPECT_EQ(GetArtApexData() + "/dalvik-cache/arm/boot-beep.oat",
	GetApexDataOatFilename("/product/javalib/beep.jar", InstructionSet::kArm));

	const std::string art_apex_jar = std::string {kAndroidArtApexDefaultPath} + "/javalib/some.jar";
	EXPECT_EQ(std::string{}, GetApexDataOatFilename(art_apex_jar, InstructionSet::kArm));

	const std::string i18n_jar = std::string{kAndroidI18nApexDefaultPath} + "/javalib/core-icu4j.jar";
	EXPECT_EQ(std::string{}, GetApexDataOatFilename(i18n_jar, InstructionSet::kArm));

	const std::string system_jar_apexdata_oat = GetArtApexData() + "/dalvik-cache/x86/boot-lace.oat";
	EXPECT_EQ(system_jar_apexdata_oat,
	GetApexDataOatFilename("/system/framework/lace.jar", InstructionSet::kX86));
	}

	TEST_F(FileUtilsTest, GetApexDataOdexFilename) {
	ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");
	ScopedUnsetEnvironmentVariable art_apex_data("ART_APEX_DATA");

	EXPECT_EQ(GetArtApexData() + "/dalvik-cache/arm/data@some@code.odex",
	GetApexDataOdexFilename("/data/some/code.dex", InstructionSet::kArm));

	const std::string art_apex_jar = std::string {kAndroidArtApexDefaultPath} + "/javalib/some.jar";
	EXPECT_EQ(
	GetArtApexData() + "/dalvik-cache/arm/apex@com.android.art@javalib@some.jar@classes.odex",
	GetApexDataOdexFilename(art_apex_jar, InstructionSet::kArm));

	const std::string i18n_jar = std::string{kAndroidI18nApexDefaultPath} + "/javalib/core-icu4j.jar";
	EXPECT_EQ(GetArtApexData() +
	"/dalvik-cache/arm/apex@com.android.i18n@javalib@core-icu4j.jar@classes.odex",
	GetApexDataOdexFilename(i18n_jar, InstructionSet::kArm));

	const std::string system_jar_apexdata_odex =
	GetArtApexData() + "/dalvik-cache/x86/system@framework@cookie.jar@classes.odex";
	EXPECT_EQ(system_jar_apexdata_odex,
	GetApexDataOdexFilename("/system/framework/cookie.jar", InstructionSet::kX86));
	}

	TEST_F(FileUtilsTest, GetApexDataBootImage) {
	ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");
	ScopedUnsetEnvironmentVariable art_apex_data("ART_APEX_DATA");

	EXPECT_EQ(std::string{},
	GetApexDataBootImage(std::string{kAndroidI18nApexDefaultPath} + "/javalib/bar.jar"));

	// Check image location has the prefix "boot-" in front of the basename of dex location and
	// that image suffix is .art.
	const std::string system_jar = "/system/framework/disk.jar";
	const std::string boot_image = GetApexDataBootImage(system_jar);
	EXPECT_EQ(GetArtApexData() + "/dalvik-cache/boot-disk.art", boot_image);

	// Check the image filename corresponds to the oat file for the same system jar.
	const InstructionSet isa = InstructionSet::kArm64;
	const std::string boot_image_filename = GetSystemImageFilename(boot_image.c_str(), isa);
	const std::string accompanying_oat_file = ReplaceFileExtension(boot_image_filename, "oat");
	EXPECT_EQ(accompanying_oat_file, GetApexDataOatFilename(system_jar, isa));
	}

	TEST_F(FileUtilsTest, GetApexDataImage) {
	ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");
	ScopedUnsetEnvironmentVariable art_apex_data("ART_APEX_DATA");

	EXPECT_EQ(
	GetArtApexData() + "/dalvik-cache/apex@com.android.wifi@lib@javalib@bar.jar@classes.art",
	GetApexDataImage(std::string {kAndroidWifiApexDefaultPath} + "/lib/javalib/bar.jar"));

	// Check image has basename of dex location with the .art suffix.
	const char* jar = "/system/framework/mcguffin/test.jar";
	const std::string image = GetApexDataImage(jar);
	EXPECT_EQ(GetArtApexData() + "/dalvik-cache/system@framework@mcguffin@test.jar@classes.art",
	image);

	// Check the image filename corresponds to the .odex file for the same system jar.
	const InstructionSet isa = InstructionSet::kX86_64;
	const std::string image_filename = GetSystemImageFilename(image.c_str(), isa);
	const std::string accompanying_odex_file = ReplaceFileExtension(image_filename, "odex");
	EXPECT_EQ(accompanying_odex_file, GetApexDataOdexFilename(jar, isa));
	}

	TEST_F(FileUtilsTest, GetApexDataDalvikCacheFilename) {
	const std::string apex_jar = std::string {kAndroidWifiApexDefaultPath} + "/lib/javalib/bar.jar";
	EXPECT_EQ(GetArtApexData() +
	"/dalvik-cache/x86_64/apex@com.android.wifi@lib@javalib@bar.jar@classes.art",
	GetApexDataDalvikCacheFilename(apex_jar, InstructionSet::kX86_64, "art"));

	// Check dalvik-cache filename follows convention.
	const std::string non_apex_jar = "/vendor/javalib/test.jar";
	const std::string art_filename =
	GetApexDataDalvikCacheFilename(non_apex_jar, InstructionSet::kArm, "art");
	CHECK_EQ(GetArtApexData() + "/dalvik-cache/arm/vendor@javalib@test.jar@classes.art",
	art_filename);

	// Check ".art", ".odex" and ".vdex" filenames are the same with the appropriate extensions
	// substituted.
	const std::string odex_filename =
	GetApexDataDalvikCacheFilename(non_apex_jar, InstructionSet::kArm, "odex");
	CHECK_EQ(odex_filename, ReplaceFileExtension(art_filename, "odex"));
	const std::string vdex_filename =
	GetApexDataDalvikCacheFilename(non_apex_jar, InstructionSet::kArm, "vdex");
	CHECK_EQ(vdex_filename, ReplaceFileExtension(art_filename, "vdex"));
	}

	TEST_F(FileUtilsTest, OverrideDalvikCacheSubDirectory) {
	ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");
	ScopedUnsetEnvironmentVariable i18n_root("ANDROID_I18N_ROOT");
	ScopedUnsetEnvironmentVariable art_apex_data("ART_APEX_DATA");

	ScopedOverrideDalvikCacheSubDirectory dalvik_cache("overridden-cache");

	EXPECT_EQ(GetArtApexData() + "/overridden-cache/arm/boot-beep.oat",
	GetApexDataOatFilename("/product/javalib/beep.jar", InstructionSet::kArm));

	EXPECT_EQ(GetArtApexData() + "/overridden-cache/arm/data@some@code.odex",
	GetApexDataOdexFilename("/data/some/code.dex", InstructionSet::kArm));

	const std::string system_jar = "/system/framework/disk.jar";
	const std::string boot_image = GetApexDataBootImage(system_jar);
	EXPECT_EQ(GetArtApexData() + "/overridden-cache/boot-disk.art", boot_image);

	EXPECT_EQ(
	GetArtApexData() + "/overridden-cache/apex@com.android.wifi@lib@javalib@bar.jar@classes.art",
	GetApexDataImage(std::string {kAndroidWifiApexDefaultPath} + "/lib/javalib/bar.jar"));

	const std::string apex_jar = std::string {kAndroidWifiApexDefaultPath} + "/lib/javalib/bar.jar";
	EXPECT_EQ(GetArtApexData() +
	"/overridden-cache/x86_64/apex@com.android.wifi@lib@javalib@bar.jar@classes.art",
	GetApexDataDalvikCacheFilename(apex_jar, InstructionSet::kX86_64, "art"));
	}

	TEST_F(FileUtilsTest, GetSystemOdexFilenameForApex) {
	ScopedUnsetEnvironmentVariable android_root("ANDROID_ROOT");

	const std::string apex_jar = std::string {kAndroidArtApexDefaultPath} + "/javalib/some.jar";
	EXPECT_EQ(
	GetAndroidRoot() + "/framework/oat/arm/apex@com.android.art@javalib@some.jar@classes.odex",
	GetSystemOdexFilenameForApex(apex_jar, InstructionSet::kArm));
	}

	TEST_F(FileUtilsTest, ApexNameFromLocation) {
	EXPECT_EQ("", ApexNameFromLocation(""));
	EXPECT_EQ("", ApexNameFromLocation("/apex/com.android.foo"));
	EXPECT_EQ("", ApexNameFromLocation("/apex//something"));
	EXPECT_EQ("com.android.foo", ApexNameFromLocation("/apex/com.android.foo/"));
	EXPECT_EQ("", ApexNameFromLocation("apex/com.android.foo/"));
	EXPECT_EQ("foo", ApexNameFromLocation("/apex/foo/something.jar"));
	EXPECT_EQ("", ApexNameFromLocation("/bar/foo/baz"));
	EXPECT_EQ("", ApexNameFromLocation("/apexx/foo/baz"));
	}

	} // namespace art