Snap for 4450504 from 5fe21afe8880f11b47fcb3ce758f8202bc4f163e to pi-release (2c44e11d) · Commits · e / os / platform_frameworks_native

cmds/installd/dexopt.cpp

+247 −168

Original line number	Diff line number	Diff line
		@@ -1385,6 +1385,8 @@ bool maybe_open_oat_and_vdex_file(const std::string& apk_path,
		oat_dir.c_str(),
		is_secondary_dex,
		oat_path)) {
		LOG(ERROR) << "Could not create oat out path for "
		<< apk_path << " with oat dir " << oat_dir;
		return false;
		}
		oat_file_fd->reset(open(oat_path, O_RDONLY));
		@@ -1489,7 +1491,7 @@ static void exec_dexoptanalyzer(const std::string& dex_file, int vdex_fd, int oa

		// Prepares the oat dir for the secondary dex files.
		static bool prepare_secondary_dex_oat_dir(const std::string& dex_path, int uid,
		const char* instruction_set, std::string* oat_dir_out) {
		const char* instruction_set) {
		unsigned long dirIndex = dex_path.rfind('/');
		if (dirIndex == std::string::npos) {
		LOG(ERROR ) << "Unexpected dir structure for secondary dex " << dex_path;
		@@ -1506,10 +1508,8 @@ static bool prepare_secondary_dex_oat_dir(const std::string& dex_path, int uid,

		char oat_dir[PKG_PATH_MAX];
		snprintf(oat_dir, PKG_PATH_MAX, "%s/oat", dex_dir.c_str());
		oat_dir_out->assign(oat_dir);

		// Create oat/isa output directory.
		if (prepare_app_cache_dir(*oat_dir_out, instruction_set, oat_dir_mode, uid, uid) != 0) {
		if (prepare_app_cache_dir(oat_dir, instruction_set, oat_dir_mode, uid, uid) != 0) {
		LOG(ERROR) << "Could not prepare oat/isa dir for secondary dex: " << dex_path;
		return false;
		}
		@@ -1517,166 +1517,236 @@ static bool prepare_secondary_dex_oat_dir(const std::string& dex_path, int uid,
		return true;
		}

		static int constexpr DEXOPTANALYZER_BIN_EXEC_ERROR = 200;
		// Return codes for identifying the reason why dexoptanalyzer was not invoked when processing
		// secondary dex files. This return codes are returned by the child process created for
		// analyzing secondary dex files in process_secondary_dex_dexopt.

		// The dexoptanalyzer was not invoked because of validation or IO errors.
		static int constexpr SECONDARY_DEX_DEXOPTANALYZER_SKIPPED = 200;
		// The dexoptanalyzer was not invoked because the dex file does not exist anymore.
		static int constexpr SECONDARY_DEX_DEXOPTANALYZER_SKIPPED_NO_FILE = 201;

		// Verifies the result of dexoptanalyzer executed for the apk_path.
		// Verifies the result of analyzing secondary dex files from process_secondary_dex_dexopt.
		// If the result is valid returns true and sets dexopt_needed_out to a valid value.
		// Returns false for errors or unexpected result values.
		static bool process_dexoptanalyzer_result(const std::string& dex_path, int result,
		// The result is expected to be either one of SECONDARY_DEX_* codes or a valid exit code
		// of dexoptanalyzer.
		static bool process_secondary_dexoptanalyzer_result(const std::string& dex_path, int result,
		int* dexopt_needed_out) {
		// The result values are defined in dexoptanalyzer.
		switch (result) {
		case 0: // no_dexopt_needed
		case 0: // dexoptanalyzer: no_dexopt_needed
		*dexopt_needed_out = NO_DEXOPT_NEEDED; return true;
		case 1: // dex2oat_from_scratch
		case 1: // dexoptanalyzer: dex2oat_from_scratch
		*dexopt_needed_out = DEX2OAT_FROM_SCRATCH; return true;
		case 5: // dex2oat_for_bootimage_odex
		case 5: // dexoptanalyzer: dex2oat_for_bootimage_odex
		*dexopt_needed_out = -DEX2OAT_FOR_BOOT_IMAGE; return true;
		case 6: // dex2oat_for_filter_odex
		case 6: // dexoptanalyzer: dex2oat_for_filter_odex
		*dexopt_needed_out = -DEX2OAT_FOR_FILTER; return true;
		case 7: // dex2oat_for_relocation_odex
		case 7: // dexoptanalyzer: dex2oat_for_relocation_odex
		*dexopt_needed_out = -DEX2OAT_FOR_RELOCATION; return true;
		case 2: // dex2oat_for_bootimage_oat
		case 3: // dex2oat_for_filter_oat
		case 4: // dex2oat_for_relocation_oat
		case 2: // dexoptanalyzer: dex2oat_for_bootimage_oat
		case 3: // dexoptanalyzer: dex2oat_for_filter_oat
		case 4: // dexoptanalyzer: dex2oat_for_relocation_oat
		LOG(ERROR) << "Dexoptnalyzer return the status of an oat file."
		<< " Expected odex file status for secondary dex " << dex_path
		<< " : dexoptanalyzer result=" << result;
		return false;
		case SECONDARY_DEX_DEXOPTANALYZER_SKIPPED_NO_FILE:
		// If the file does not exist there's no need for dexopt.
		*dexopt_needed_out = NO_DEXOPT_NEEDED;
		return true;
		case SECONDARY_DEX_DEXOPTANALYZER_SKIPPED:
		return false;
		default:
		LOG(ERROR) << "Unexpected result for dexoptanalyzer " << dex_path
		<< " exec_dexoptanalyzer result=" << result;
		LOG(ERROR) << "Unexpected result from analyzing secondary dex " << dex_path
		<< " result=" << result;
		return false;
		}
		}

		// Processes the dex_path as a secondary dex files and return true if the path dex file should
		// be compiled. Returns false for errors (logged) or true if the secondary dex path was process
		// successfully.
		// When returning true, the output parameters will be:
		// - is_public_out: whether or not the oat file should not be made public
		// - dexopt_needed_out: valid OatFileAsssitant::DexOptNeeded
		// - oat_dir_out: the oat dir path where the oat file should be stored
		// - dex_path_out: the real path of the dex file
		static bool process_secondary_dex_dexopt(const char* original_dex_path, const char* pkgname,
		int dexopt_flags, const char* volume_uuid, int uid, const char* instruction_set,
		const char* compiler_filter, bool* is_public_out, int* dexopt_needed_out,
		std::string* oat_dir_out, std::string* dex_path_out, bool downgrade,
		const char* class_loader_context) {
		int storage_flag;
		enum SecondaryDexAccess {
		kSecondaryDexAccessReadOk = 0,
		kSecondaryDexAccessDoesNotExist = 1,
		kSecondaryDexAccessPermissionError = 2,
		kSecondaryDexAccessIOError = 3
		};

		static SecondaryDexAccess check_secondary_dex_access(const std::string& dex_path) {
		// Check if the path exists and can be read. If not, there's nothing to do.
		if (access(dex_path.c_str(), R_OK) == 0) {
		return kSecondaryDexAccessReadOk;
		} else {
		if (errno == ENOENT) {
		LOG(INFO) << "Secondary dex does not exist: " << dex_path;
		return kSecondaryDexAccessDoesNotExist;
		} else {
		PLOG(ERROR) << "Could not access secondary dex " << dex_path;
		return errno == EACCES
		? kSecondaryDexAccessPermissionError
		: kSecondaryDexAccessIOError;
		}
		}
		}

		static bool is_file_public(const std::string& filename) {
		struct stat file_stat;
		if (stat(filename.c_str(), &file_stat) == 0) {
		return (file_stat.st_mode & S_IROTH) != 0;
		}
		return false;
		}

		// Create the oat file structure for the secondary dex 'dex_path' and assign
		// the individual path component to the 'out_' parameters.
		static bool create_secondary_dex_oat_layout(const std::string& dex_path, const std::string& isa,
		char* out_oat_dir, char* out_oat_isa_dir, char* out_oat_path) {
		size_t dirIndex = dex_path.rfind('/');
		if (dirIndex == std::string::npos) {
		LOG(ERROR) << "Unexpected dir structure for dex file " << dex_path;
		return false;
		}
		// TODO(calin): we have similar computations in at lest 3 other places
		// (InstalldNativeService, otapropt and dexopt). Unify them and get rid of snprintf by
		// using string append.
		std::string apk_dir = dex_path.substr(0, dirIndex);
		snprintf(out_oat_dir, PKG_PATH_MAX, "%s/oat", apk_dir.c_str());
		snprintf(out_oat_isa_dir, PKG_PATH_MAX, "%s/%s", out_oat_dir, isa.c_str());

		if (!create_oat_out_path(dex_path.c_str(), isa.c_str(), out_oat_dir,
		/is_secondary_dex/true, out_oat_path)) {
		LOG(ERROR) << "Could not create oat path for secondary dex " << dex_path;
		return false;
		}
		return true;
		}

		// Validate that the dexopt_flags contain a valid storage flag and convert that to an installd
		// recognized storage flags (FLAG_STORAGE_CE or FLAG_STORAGE_DE).
		static bool validate_dexopt_storage_flags(int dexopt_flags, int* out_storage_flag) {
		if ((dexopt_flags & DEXOPT_STORAGE_CE) != 0) {
		storage_flag = FLAG_STORAGE_CE;
		*out_storage_flag = FLAG_STORAGE_CE;
		if ((dexopt_flags & DEXOPT_STORAGE_DE) != 0) {
		LOG(ERROR) << "Ambiguous secondary dex storage flag. Both, CE and DE, flags are set";
		return false;
		}
		} else if ((dexopt_flags & DEXOPT_STORAGE_DE) != 0) {
		storage_flag = FLAG_STORAGE_DE;
		*out_storage_flag = FLAG_STORAGE_DE;
		} else {
		LOG(ERROR) << "Secondary dex storage flag must be set";
		return false;
		}
		return true;
		}

		{
		// As opposed to the primary apk, secondary dex files might contain symlinks.
		// Resolve the path before passing it to the validate method to
		// make sure the verification is done on the real location.
		UniqueCPtr<char> dex_real_path_cstr(realpath(original_dex_path, nullptr));
		if (dex_real_path_cstr == nullptr) {
		PLOG(ERROR) << "Could not get the real path of the secondary dex file "
		<< original_dex_path;
		// Processes the dex_path as a secondary dex files and return true if the path dex file should
		// be compiled. Returns false for errors (logged) or true if the secondary dex path was process
		// successfully.
		// When returning true, the output parameters will be:
		// - is_public_out: whether or not the oat file should not be made public
		// - dexopt_needed_out: valid OatFileAsssitant::DexOptNeeded
		// - oat_dir_out: the oat dir path where the oat file should be stored
		static bool process_secondary_dex_dexopt(const std::string& dex_path, const char* pkgname,
		int dexopt_flags, const char* volume_uuid, int uid, const char* instruction_set,
		const char* compiler_filter, bool* is_public_out, int* dexopt_needed_out,
		std::string* oat_dir_out, bool downgrade, const char* class_loader_context) {
		LOG(DEBUG) << "Processing secondary dex path " << dex_path;
		int storage_flag;
		if (!validate_dexopt_storage_flags(dexopt_flags, &storage_flag)) {
		return false;
		} else {
		dex_path_out->assign(dex_real_path_cstr.get());
		}
		}
		const std::string& dex_path = *dex_path_out;
		if (!validate_dex_path_size(dex_path)) {
		// Compute the oat dir as it's not easy to extract it from the child computation.
		char oat_path[PKG_PATH_MAX];
		char oat_dir[PKG_PATH_MAX];
		char oat_isa_dir[PKG_PATH_MAX];
		if (!create_secondary_dex_oat_layout(
		dex_path, instruction_set, oat_dir, oat_isa_dir, oat_path)) {
		LOG(ERROR) << "Could not create secondary odex layout: " << dex_path;
		return false;
		}
		oat_dir_out->assign(oat_dir);

		pid_t pid = fork();
		if (pid == 0) {
		// child -- drop privileges before continuing.
		drop_capabilities(uid);

		// Validate the path structure.
		if (!validate_secondary_dex_path(pkgname, dex_path, volume_uuid, uid, storage_flag)) {
		LOG(ERROR) << "Could not validate secondary dex path " << dex_path;
		return false;
		_exit(SECONDARY_DEX_DEXOPTANALYZER_SKIPPED);
		}

		// Check if the path exist. If not, there's nothing to do.
		struct stat dex_path_stat;
		if (stat(dex_path.c_str(), &dex_path_stat) != 0) {
		// Open the dex file.
		unique_fd zip_fd;
		zip_fd.reset(open(dex_path.c_str(), O_RDONLY));
		if (zip_fd.get() < 0) {
		if (errno == ENOENT) {
		// Secondary dex files might be deleted any time by the app.
		// Nothing to do if that's the case
		ALOGV("Secondary dex does not exist %s", dex_path.c_str());
		return NO_DEXOPT_NEEDED;
		_exit(SECONDARY_DEX_DEXOPTANALYZER_SKIPPED_NO_FILE);
		} else {
		PLOG(ERROR) << "Could not access secondary dex " << dex_path;
		_exit(SECONDARY_DEX_DEXOPTANALYZER_SKIPPED);
		}
		}

		// Check if we should make the oat file public.
		// Note that if the dex file is not public the compiled code cannot be made public.
		*is_public_out = ((dexopt_flags & DEXOPT_PUBLIC) != 0) &&
		((dex_path_stat.st_mode & S_IROTH) != 0);

		// Prepare the oat directories.
		if (!prepare_secondary_dex_oat_dir(dex_path, uid, instruction_set, oat_dir_out)) {
		return false;
		if (!prepare_secondary_dex_oat_dir(dex_path, uid, instruction_set)) {
		_exit(SECONDARY_DEX_DEXOPTANALYZER_SKIPPED);
		}

		// Analyze profiles.
		bool profile_was_updated = analyze_profiles(uid, dex_path, /is_secondary_dex/true);

		// Open the vdex/oat files if any.
		unique_fd oat_file_fd;
		unique_fd vdex_file_fd;
		unique_fd zip_fd;
		zip_fd.reset(open(dex_path.c_str(), O_RDONLY));
		if (zip_fd.get() < 0) {
		PLOG(ERROR) << "installd cannot open " << dex_path << " for input during dexopt";
		return false;
		}
		if (!maybe_open_oat_and_vdex_file(dex_path,
		*oat_dir_out,
		instruction_set,
		true /* is_secondary_dex */,
		&oat_file_fd,
		&vdex_file_fd)) {
		return false;
		_exit(SECONDARY_DEX_DEXOPTANALYZER_SKIPPED);
		}

		pid_t pid = fork();
		if (pid == 0) {
		// child -- drop privileges before continuing.
		drop_capabilities(uid);
		// Run dexoptanalyzer to get dexopt_needed code.
		// Analyze profiles.
		bool profile_was_updated = analyze_profiles(uid, dex_path, /is_secondary_dex/true);

		// Run dexoptanalyzer to get dexopt_needed code. This is not expected to return.
		exec_dexoptanalyzer(dex_path,
		vdex_file_fd.get(),
		oat_file_fd.get(),
		zip_fd.get(),
		instruction_set,
		compiler_filter,
		profile_was_updated,
		downgrade, class_loader_context);
		exit(DEXOPTANALYZER_BIN_EXEC_ERROR);
		compiler_filter, profile_was_updated,
		downgrade,
		class_loader_context);
		PLOG(ERROR) << "Failed to exec dexoptanalyzer";
		_exit(SECONDARY_DEX_DEXOPTANALYZER_SKIPPED);
		}

		/* parent */

		int result = wait_child(pid);
		if (!WIFEXITED(result)) {
		LOG(ERROR) << "dexoptanalyzer failed for path " << dex_path << ": " << result;
		return false;
		}
		result = WEXITSTATUS(result);
		bool success = process_dexoptanalyzer_result(dex_path, result, dexopt_needed_out);
		// Check that we successfully executed dexoptanalyzer.
		bool success = process_secondary_dexoptanalyzer_result(dex_path, result, dexopt_needed_out);

		LOG(DEBUG) << "Processed secondary dex file " << dex_path << " result=" << result;

		// Run dexopt only if needed or forced.
		// Note that dexoptanalyzer is executed even if force compilation is enabled.
		// We ignore its valid dexopNeeded result, but still check (in process_dexoptanalyzer_result)
		// that we only get results for odex files (apk_dir/oat/isa/code.odex) and not
		// for oat files from dalvik-cache.
		if (success && ((dexopt_flags & DEXOPT_FORCE) != 0)) {
		// Note that dexoptanalyzer is executed even if force compilation is enabled (because it
		// makes the code simpler; force compilation is only needed during tests).
		if (success &&
		(result != SECONDARY_DEX_DEXOPTANALYZER_SKIPPED_NO_FILE) &&
		((dexopt_flags & DEXOPT_FORCE) != 0)) {
		*dexopt_needed_out = DEX2OAT_FROM_SCRATCH;
		}

		// Check if we should make the oat file public.
		// Note that if the dex file is not public the compiled code cannot be made public.
		// It is ok to check this flag outside in the parent process.
		*is_public_out = ((dexopt_flags & DEXOPT_PUBLIC) != 0) && is_file_public(dex_path);

		return success;
		}

		@@ -1708,13 +1778,11 @@ int dexopt(const char* dex_path, uid_t uid, const char* pkgname, const char* ins

		// Check if we're dealing with a secondary dex file and if we need to compile it.
		std::string oat_dir_str;
		std::string dex_real_path;
		if (is_secondary_dex) {
		if (process_secondary_dex_dexopt(dex_path, pkgname, dexopt_flags, volume_uuid, uid,
		instruction_set, compiler_filter, &is_public, &dexopt_needed, &oat_dir_str,
		&dex_real_path, downgrade, class_loader_context)) {
		downgrade, class_loader_context)) {
		oat_dir = oat_dir_str.c_str();
		dex_path = dex_real_path.c_str();
		if (dexopt_needed == NO_DEXOPT_NEEDED) {
		return 0; // Nothing to do, report success.
		}
		@@ -1852,29 +1920,13 @@ static bool unlink_if_exists(const std::string& file) {
		return false;
		}

		// Create the oat file structure for the secondary dex 'dex_path' and assign
		// the individual path component to the 'out_' parameters.
		static bool create_secondary_dex_oat_layout(const std::string& dex_path, const std::string& isa,
		/out/char* out_oat_dir, /out/char* out_oat_isa_dir, /out/char* out_oat_path) {
		size_t dirIndex = dex_path.rfind('/');
		if (dirIndex == std::string::npos) {
		LOG(ERROR) << "Unexpected dir structure for dex file " << dex_path;
		return false;
		}
		// TODO(calin): we have similar computations in at lest 3 other places
		// (InstalldNativeService, otapropt and dexopt). Unify them and get rid of snprintf by
		// use string append.
		std::string apk_dir = dex_path.substr(0, dirIndex);
		snprintf(out_oat_dir, PKG_PATH_MAX, "%s/oat", apk_dir.c_str());
		snprintf(out_oat_isa_dir, PKG_PATH_MAX, "%s/%s", out_oat_dir, isa.c_str());

		if (!create_oat_out_path(dex_path.c_str(), isa.c_str(), out_oat_dir,
		/is_secondary_dex/true, out_oat_path)) {
		LOG(ERROR) << "Could not create oat path for secondary dex " << dex_path;
		return false;
		}
		return true;
		}
		enum ReconcileSecondaryDexResult {
		kReconcileSecondaryDexExists = 0,
		kReconcileSecondaryDexCleanedUp = 1,
		kReconcileSecondaryDexValidationError = 2,
		kReconcileSecondaryDexCleanUpError = 3,
		kReconcileSecondaryDexAccessIOError = 4,
		};

		// Reconcile the secondary dex 'dex_path' and its generated oat files.
		// Return true if all the parameters are valid and the secondary dex file was
		@@ -1888,60 +1940,55 @@ bool reconcile_secondary_dex_file(const std::string& dex_path,
		const std::string& pkgname, int uid, const std::vector<std::string>& isas,
		const std::unique_ptr<std::string>& volume_uuid, int storage_flag,
		/out/bool* out_secondary_dex_exists) {
		// Set out to false to start with, just in case we have validation errors.
		*out_secondary_dex_exists = false;
		if (!validate_dex_path_size(dex_path)) {
		*out_secondary_dex_exists = false; // start by assuming the file does not exist.
		if (isas.size() == 0) {
		LOG(ERROR) << "reconcile_secondary_dex_file called with empty isas vector";
		return false;
		}

		if (isas.size() == 0) {
		LOG(ERROR) << "reconcile_secondary_dex_file called with empty isas vector";
		if (storage_flag != FLAG_STORAGE_CE && storage_flag != FLAG_STORAGE_DE) {
		LOG(ERROR) << "reconcile_secondary_dex_file called with invalid storage_flag: "
		<< storage_flag;
		return false;
		}

		const char* volume_uuid_cstr = volume_uuid == nullptr ? nullptr : volume_uuid->c_str();
		// As a security measure we want to unlink art artifacts with the reduced capabilities
		// of the package user id. So we fork and drop capabilities in the child.
		pid_t pid = fork();
		if (pid == 0) {
		/* child -- drop privileges before continuing */
		drop_capabilities(uid);

		// Note that we cannot validate the package path here because the file might not exist
		// and we cannot call realpath to resolve system symlinks. Since /data/user/0 symlinks to
		// /data/data/ a lot of validations will fail if we attempt to check the package path.
		// It is still ok to be more relaxed because any file removal is done after forking and
		// dropping capabilities.
		const char* volume_uuid_cstr = volume_uuid == nullptr ? nullptr : volume_uuid->c_str();
		if (!validate_secondary_dex_path(pkgname.c_str(), dex_path.c_str(), volume_uuid_cstr,
		uid, storage_flag, /validate_package_path/ false)) {
		uid, storage_flag)) {
		LOG(ERROR) << "Could not validate secondary dex path " << dex_path;
		return false;
		_exit(kReconcileSecondaryDexValidationError);
		}

		if (access(dex_path.c_str(), F_OK) == 0) {
		// The path exists, nothing to do. The odex files (if any) will be left untouched.
		*out_secondary_dex_exists = true;
		return true;
		} else if (errno != ENOENT) {
		PLOG(ERROR) << "Failed to check access to secondary dex " << dex_path;
		return false;
		SecondaryDexAccess access_check = check_secondary_dex_access(dex_path);
		switch (access_check) {
		case kSecondaryDexAccessDoesNotExist:
		// File does not exist. Proceed with cleaning.
		break;
		case kSecondaryDexAccessReadOk: _exit(kReconcileSecondaryDexExists);
		case kSecondaryDexAccessIOError: _exit(kReconcileSecondaryDexAccessIOError);
		case kSecondaryDexAccessPermissionError: _exit(kReconcileSecondaryDexValidationError);
		default:
		LOG(ERROR) << "Unexpected result from check_secondary_dex_access: " << access_check;
		_exit(kReconcileSecondaryDexValidationError);
		}

		// As a security measure we want to unlink art artifacts with the reduced capabilities
		// of the package user id. So we fork and drop capabilities in the child.
		pid_t pid = fork();
		if (pid == 0) {
		// The secondary dex does not exist anymore. Clear any generated files.
		// The secondary dex does not exist anymore or it's. Clear any generated files.
		char oat_path[PKG_PATH_MAX];
		char oat_dir[PKG_PATH_MAX];
		char oat_isa_dir[PKG_PATH_MAX];
		bool result = true;
		/* child -- drop privileges before continuing */
		drop_capabilities(uid);
		for (size_t i = 0; i < isas.size(); i++) {
		if (!create_secondary_dex_oat_layout(dex_path,
		isas[i],
		oat_dir,
		oat_isa_dir,
		oat_path)) {
		LOG(ERROR) << "Could not create secondary odex layout: "
		<< dex_path;
		result = false;
		continue;
		if (!create_secondary_dex_oat_layout(
		dex_path,isas[i], oat_dir, oat_isa_dir, oat_path)) {
		LOG(ERROR) << "Could not create secondary odex layout: " << dex_path;
		_exit(kReconcileSecondaryDexValidationError);
		}

		// Delete oat/vdex/art files.
		@@ -1966,11 +2013,43 @@ bool reconcile_secondary_dex_file(const std::string& dex_path,
		result = rmdir_if_empty(oat_isa_dir) && result;
		result = rmdir_if_empty(oat_dir) && result;
		}
		result ? _exit(0) : _exit(1);
		if (!result) {
		PLOG(ERROR) << "Failed to clean secondary dex artifacts for location " << dex_path;
		}
		_exit(result ? kReconcileSecondaryDexCleanedUp : kReconcileSecondaryDexAccessIOError);
		}

		int return_code = wait_child(pid);
		return return_code == 0;
		if (!WIFEXITED(return_code)) {
		LOG(WARNING) << "reconcile dex failed for location " << dex_path << ": " << return_code;
		} else {
		return_code = WEXITSTATUS(return_code);
		}

		LOG(DEBUG) << "Reconcile secondary dex path " << dex_path << " result=" << return_code;

		switch (return_code) {
		case kReconcileSecondaryDexCleanedUp:
		case kReconcileSecondaryDexValidationError:
		// If we couldn't validate assume the dex file does not exist.
		// This will purge the entry from the PM records.
		*out_secondary_dex_exists = false;
		return true;
		case kReconcileSecondaryDexExists:
		*out_secondary_dex_exists = true;
		return true;
		case kReconcileSecondaryDexAccessIOError:
		// We had an access IO error.
		// Return false so that we can try again.
		// The value of out_secondary_dex_exists does not matter in this case and by convention
		// is set to false.
		*out_secondary_dex_exists = false;
		return false;
		default:
		LOG(ERROR) << "Unexpected code from reconcile_secondary_dex_file: " << return_code;
		*out_secondary_dex_exists = false;
		return false;
		}
		}

		// Helper for move_ab, so that we can have common failure-case cleanup.