Merge "Frameworks/base: Add native bridge post-fork initialization" (523afd15) · Commits · e / os / android_frameworks_base

core/java/android/os/Process.java

+9 −1

Original line number	Diff line number	Diff line
		@@ -456,6 +456,7 @@ public class Process {
		* @param targetSdkVersion The target SDK version for the app.
		* @param seInfo null-ok SELinux information for the new process.
		* @param abi non-null the ABI this app should be started with.
		* @param instructionSet null-ok the instruction set to use.
		* @param zygoteArgs Additional arguments to supply to the zygote process.
		*
		* @return An object that describes the result of the attempt to start the process.
		@@ -470,11 +471,12 @@ public class Process {
		int targetSdkVersion,
		String seInfo,
		String abi,
		String instructionSet,
		String[] zygoteArgs) {
		try {
		return startViaZygote(processClass, niceName, uid, gid, gids,
		debugFlags, mountExternal, targetSdkVersion, seInfo,
		abi, zygoteArgs);
		abi, instructionSet, zygoteArgs);
		} catch (ZygoteStartFailedEx ex) {
		Log.e(LOG_TAG,
		"Starting VM process through Zygote failed");
		@@ -577,6 +579,7 @@ public class Process {
		* @param targetSdkVersion The target SDK version for the app.
		* @param seInfo null-ok SELinux information for the new process.
		* @param abi the ABI the process should use.
		* @param instructionSet null-ok the instruction set to use.
		* @param extraArgs Additional arguments to supply to the zygote process.
		* @return An object that describes the result of the attempt to start the process.
		* @throws ZygoteStartFailedEx if process start failed for any reason
		@@ -589,6 +592,7 @@ public class Process {
		int targetSdkVersion,
		String seInfo,
		String abi,
		String instructionSet,
		String[] extraArgs)
		throws ZygoteStartFailedEx {
		synchronized(Process.class) {
		@@ -648,6 +652,10 @@ public class Process {
		argsForZygote.add("--seinfo=" + seInfo);
		}

		if (instructionSet != null) {
		argsForZygote.add("--instruction-set=" + instructionSet);
		}

		argsForZygote.add(processClass);

		if (extraArgs != null) {

core/java/com/android/internal/os/Zygote.java

+9 −5

Original line number	Diff line number	Diff line
		@@ -75,21 +75,25 @@ public final class Zygote {
		* file descriptor numbers that are to be closed by the child
		* (and replaced by /dev/null) after forking. An integer value
		* of -1 in any entry in the array means "ignore this one".
		* @param instructionSet null-ok the instruction set to use.
		*
		* @return 0 if this is the child, pid of the child
		* if this is the parent, or -1 on error.
		*/
		public static int forkAndSpecialize(int uid, int gid, int[] gids, int debugFlags,
		int[][] rlimits, int mountExternal, String seInfo, String niceName, int[] fdsToClose) {
		int[][] rlimits, int mountExternal, String seInfo, String niceName, int[] fdsToClose,
		String instructionSet) {
		VM_HOOKS.preFork();
		int pid = nativeForkAndSpecialize(
		uid, gid, gids, debugFlags, rlimits, mountExternal, seInfo, niceName, fdsToClose);
		uid, gid, gids, debugFlags, rlimits, mountExternal, seInfo, niceName, fdsToClose,
		instructionSet);
		VM_HOOKS.postForkCommon();
		return pid;
		}

		native private static int nativeForkAndSpecialize(int uid, int gid, int[] gids,int debugFlags,
		int[][] rlimits, int mountExternal, String seInfo, String niceName, int[] fdsToClose);
		int[][] rlimits, int mountExternal, String seInfo, String niceName, int[] fdsToClose,
		String instructionSet);

		/**
		* Special method to start the system server process. In addition to the
		@@ -126,8 +130,8 @@ public final class Zygote {
		native private static int nativeForkSystemServer(int uid, int gid, int[] gids, int debugFlags,
		int[][] rlimits, long permittedCapabilities, long effectiveCapabilities);

		private static void callPostForkChildHooks(int debugFlags) {
		VM_HOOKS.postForkChild(debugFlags);
		private static void callPostForkChildHooks(int debugFlags, String instructionSet) {
		VM_HOOKS.postForkChild(debugFlags, instructionSet);
		}

core/java/com/android/internal/os/ZygoteConnection.java

+9 −1

Original line number	Diff line number	Diff line
		@@ -222,7 +222,7 @@ class ZygoteConnection {

		pid = Zygote.forkAndSpecialize(parsedArgs.uid, parsedArgs.gid, parsedArgs.gids,
		parsedArgs.debugFlags, rlimits, parsedArgs.mountExternal, parsedArgs.seInfo,
		parsedArgs.niceName, fdsToClose);
		parsedArgs.niceName, fdsToClose, parsedArgs.instructionSet);
		} catch (IOException ex) {
		logAndPrintError(newStderr, "Exception creating pipe", ex);
		} catch (ErrnoException ex) {
		@@ -311,6 +311,7 @@ class ZygoteConnection {
		* [--] <args for RuntimeInit >
		* <li> If <code>--runtime-init</code> is absent:
		* [--] <classname> [args...]
		* <li> --instruction-set=<i>instruction-set-string</i> which instruction set to use/emulate.
		* </ul>
		*/
		static class Arguments {
		@@ -373,6 +374,11 @@ class ZygoteConnection {
		*/
		boolean abiListQuery;

		/**
		* The instruction set to use, or null when not important.
		*/
		String instructionSet;

		/**
		* Constructs instance and parses args
		* @param args zygote command-line args
		@@ -528,6 +534,8 @@ class ZygoteConnection {
		mountExternal = Zygote.MOUNT_EXTERNAL_MULTIUSER_ALL;
		} else if (arg.equals("--query-abi-list")) {
		abiListQuery = true;
		} else if (arg.startsWith("--instruction-set=")) {
		instructionSet = arg.substring(arg.indexOf('=') + 1);
		} else {
		break;
		}

core/jni/com_android_internal_os_Zygote.cpp

+11 −7

Original line number	Diff line number	Diff line
		@@ -402,7 +402,8 @@ static pid_t ForkAndSpecializeCommon(JNIEnv* env, uid_t uid, gid_t gid, jintArra
		jlong permittedCapabilities, jlong effectiveCapabilities,
		jint mount_external,
		jstring java_se_info, jstring java_se_name,
		bool is_system_server, jintArray fdsToClose) {
		bool is_system_server, jintArray fdsToClose,
		jstring instructionSet) {
		SetSigChldHandler();

		pid_t pid = fork();
		@@ -505,7 +506,8 @@ static pid_t ForkAndSpecializeCommon(JNIEnv* env, uid_t uid, gid_t gid, jintArra

		UnsetSigChldHandler();

		env->CallStaticVoidMethod(gZygoteClass, gCallPostForkChildHooks, debug_flags);
		env->CallStaticVoidMethod(gZygoteClass, gCallPostForkChildHooks, debug_flags,
		is_system_server ? NULL : instructionSet);
		if (env->ExceptionCheck()) {
		ALOGE("Error calling post fork hooks.");
		RuntimeAbort(env);
		@@ -523,9 +525,9 @@ static jint com_android_internal_os_Zygote_nativeForkAndSpecialize(
		JNIEnv* env, jclass, jint uid, jint gid, jintArray gids,
		jint debug_flags, jobjectArray rlimits,
		jint mount_external, jstring se_info, jstring se_name,
		jintArray fdsToClose) {
		jintArray fdsToClose, jstring instructionSet) {
		return ForkAndSpecializeCommon(env, uid, gid, gids, debug_flags,
		rlimits, 0, 0, mount_external, se_info, se_name, false, fdsToClose);
		rlimits, 0, 0, mount_external, se_info, se_name, false, fdsToClose, instructionSet);
		}

		static jint com_android_internal_os_Zygote_nativeForkSystemServer(
		@@ -535,7 +537,7 @@ static jint com_android_internal_os_Zygote_nativeForkSystemServer(
		pid_t pid = ForkAndSpecializeCommon(env, uid, gid, gids,
		debug_flags, rlimits,
		permittedCapabilities, effectiveCapabilities,
		MOUNT_EXTERNAL_NONE, NULL, NULL, true, NULL);
		MOUNT_EXTERNAL_NONE, NULL, NULL, true, NULL, NULL);
		if (pid > 0) {
		// The zygote process checks whether the child process has died or not.
		ALOGI("System server process %d has been created", pid);
		@@ -553,7 +555,8 @@ static jint com_android_internal_os_Zygote_nativeForkSystemServer(
		}

		static JNINativeMethod gMethods[] = {
		{ "nativeForkAndSpecialize", "(II[II[[IILjava/lang/String;Ljava/lang/String;[I)I",
		{ "nativeForkAndSpecialize",
		"(II[II[[IILjava/lang/String;Ljava/lang/String;[ILjava/lang/String;)I",
		(void *) com_android_internal_os_Zygote_nativeForkAndSpecialize },
		{ "nativeForkSystemServer", "(II[II[[IJJ)I",
		(void *) com_android_internal_os_Zygote_nativeForkSystemServer }
		@@ -564,7 +567,8 @@ int register_com_android_internal_os_Zygote(JNIEnv* env) {
		if (gZygoteClass == NULL) {
		RuntimeAbort(env);
		}
		gCallPostForkChildHooks = env->GetStaticMethodID(gZygoteClass, "callPostForkChildHooks", "(I)V");
		gCallPostForkChildHooks = env->GetStaticMethodID(gZygoteClass, "callPostForkChildHooks",
		"(ILjava/lang/String;)V");

		return AndroidRuntime::registerNativeMethods(env, "com/android/internal/os/Zygote",
		gMethods, NELEM(gMethods));

services/java/com/android/server/am/ActivityManagerService.java

+7 −1

Original line number	Diff line number	Diff line
		@@ -170,6 +170,7 @@ import android.view.Gravity;
		import android.view.LayoutInflater;
		import android.view.View;
		import android.view.WindowManager;
		import dalvik.system.VMRuntime;

		import java.io.BufferedInputStream;
		import java.io.BufferedOutputStream;
		@@ -2786,11 +2787,16 @@ public final class ActivityManagerService extends ActivityManagerNative
		requiredAbi = Build.SUPPORTED_ABIS[0];
		}

		String instructionSet = null;
		if (app.info.cpuAbi != null) {
		instructionSet = VMRuntime.getInstructionSet(app.info.cpuAbi);
		}

		// Start the process. It will either succeed and return a result containing
		// the PID of the new process, or else throw a RuntimeException.
		Process.ProcessStartResult startResult = Process.start("android.app.ActivityThread",
		app.processName, uid, uid, gids, debugFlags, mountExternal,
		app.info.targetSdkVersion, app.info.seinfo, requiredAbi, null);
		app.info.targetSdkVersion, app.info.seinfo, requiredAbi, instructionSet, null);

		BatteryStatsImpl bs = mBatteryStatsService.getActiveStatistics();
		synchronized (bs) {