Merge "Ensure apps cannot prevent uncaught exceptions being logged." (f61a449e) · Commits · e / os / android_frameworks_base

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

+42 −19

Original line number	Diff line number	Diff line
		@@ -62,21 +62,25 @@ public class RuntimeInit {
		}

		/**
		* Use this to log a message when a thread exits due to an uncaught
		* exception. The framework catches these for the main threads, so
		* this should only matter for threads created by applications.
		* Logs a message when a thread encounters an uncaught exception. By
		* default, {@link KillApplicationHandler} will terminate this process later,
		* but apps can override that behavior.
		*/
		private static class UncaughtHandler implements Thread.UncaughtExceptionHandler {
		private static class LoggingHandler implements Thread.UncaughtExceptionHandler {
		@Override
		public void uncaughtException(Thread t, Throwable e) {
		try {
		// Don't re-enter -- avoid infinite loops if crash-reporting crashes.
		// Don't re-enter if KillApplicationHandler has already run
		if (mCrashing) return;
		mCrashing = true;

		if (mApplicationObject == null) {
		// The "FATAL EXCEPTION" string is still used on Android even though
		// apps can set a custom UncaughtExceptionHandler that renders uncaught
		// exceptions non-fatal.
		Clog_e(TAG, "*** FATAL EXCEPTION IN SYSTEM PROCESS: " + t.getName(), e);
		} else {
		StringBuilder message = new StringBuilder();
		// The "FATAL EXCEPTION" string is still used on Android even though
		// apps can set a custom UncaughtExceptionHandler that renders uncaught
		// exceptions non-fatal.
		message.append("FATAL EXCEPTION: ").append(t.getName()).append("\n");
		final String processName = ActivityThread.currentProcessName();
		if (processName != null) {
		@@ -85,6 +89,21 @@ public class RuntimeInit {
		message.append("PID: ").append(Process.myPid());
		Clog_e(TAG, message.toString(), e);
		}
		}
		}

		/**
		* Handle application death from an uncaught exception. The framework
		* catches these for the main threads, so this should only matter for
		* threads created by applications. Before this method runs,
		* {@link LoggingHandler} will already have logged details.
		*/
		private static class KillApplicationHandler implements Thread.UncaughtExceptionHandler {
		public void uncaughtException(Thread t, Throwable e) {
		try {
		// Don't re-enter -- avoid infinite loops if crash-reporting crashes.
		if (mCrashing) return;
		mCrashing = true;

		// Try to end profiling. If a profiler is running at this point, and we kill the
		// process (below), the in-memory buffer will be lost. So try to stop, which will
		@@ -113,8 +132,12 @@ public class RuntimeInit {
		private static final void commonInit() {
		if (DEBUG) Slog.d(TAG, "Entered RuntimeInit!");

		/* set default handler; this applies to all threads in the VM */
		Thread.setDefaultUncaughtExceptionHandler(new UncaughtHandler());
		/*
		* set handlers; these apply to all threads in the VM. Apps can replace
		* the default handler, but not the pre handler.
		*/
		Thread.setUncaughtExceptionPreHandler(new LoggingHandler());
		Thread.setDefaultUncaughtExceptionHandler(new KillApplicationHandler());

		/*
		* Install a TimezoneGetter subclass for ZoneInfo.db

preloaded-classes

+2 −1

Original line number	Diff line number	Diff line
		@@ -2257,7 +2257,8 @@ com.android.internal.os.LoggingPrintStream$1
		com.android.internal.os.RuntimeInit
		com.android.internal.os.RuntimeInit$1
		com.android.internal.os.RuntimeInit$Arguments
		com.android.internal.os.RuntimeInit$UncaughtHandler
		com.android.internal.os.RuntimeInit$KillApplicationHandler
		com.android.internal.os.RuntimeInit$LoggingHandler
		com.android.internal.os.SamplingProfilerIntegration
		com.android.internal.os.SomeArgs
		com.android.internal.os.Zygote