Merge "Check process state when killing background processes for density" into... (34b55875) · Commits · e / os / android_frameworks_base

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

+51 −16

Original line number	Diff line number	Diff line
		@@ -5359,17 +5359,6 @@ public final class ActivityManagerService extends ActivityManagerNative

		@Override
		public void killAllBackgroundProcesses() {
		killAllBackgroundProcesses(-1);
		}

		/**
		* Kills all background processes with targetSdkVersion below the specified
		* target SDK version.
		*
		* @param targetSdkVersion the target SDK version below which to kill
		* processes, or {@code -1} to kill all processes
		*/
		private void killAllBackgroundProcesses(int targetSdkVersion) {
		if (checkCallingPermission(android.Manifest.permission.KILL_BACKGROUND_PROCESSES)
		!= PackageManager.PERMISSION_GRANTED) {
		final String msg = "Permission Denial: killAllBackgroundProcesses() from pid="
		@@ -5393,10 +5382,6 @@ public final class ActivityManagerService extends ActivityManagerNative
		// We don't kill persistent processes.
		continue;
		}
		if (targetSdkVersion > 0
		&& app.info.targetSdkVersion >= targetSdkVersion) {
		continue;
		}
		if (app.removed) {
		procs.add(app);
		} else if (app.setAdj >= ProcessList.CACHED_APP_MIN_ADJ) {
		@@ -5421,6 +5406,55 @@ public final class ActivityManagerService extends ActivityManagerNative
		}
		}

		/**
		* Kills all background processes, except those matching any of the
		* specified properties.
		*
		* @param minTargetSdk the target SDK version at or above which to preserve
		* processes, or {@code -1} to ignore the target SDK
		* @param maxProcState the process state at or below which to preserve
		* processes, or {@code -1} to ignore the process state
		*/
		private void killAllBackgroundProcessesExcept(int minTargetSdk, int maxProcState) {
		if (checkCallingPermission(android.Manifest.permission.KILL_BACKGROUND_PROCESSES)
		!= PackageManager.PERMISSION_GRANTED) {
		final String msg = "Permission Denial: killAllBackgroundProcessesExcept() from pid="
		+ Binder.getCallingPid() + ", uid=" + Binder.getCallingUid()
		+ " requires " + android.Manifest.permission.KILL_BACKGROUND_PROCESSES;
		Slog.w(TAG, msg);
		throw new SecurityException(msg);
		}

		final long callingId = Binder.clearCallingIdentity();
		try {
		synchronized (this) {
		final ArrayList<ProcessRecord> procs = new ArrayList<>();
		final int NP = mProcessNames.getMap().size();
		for (int ip = 0; ip < NP; ip++) {
		final SparseArray<ProcessRecord> apps = mProcessNames.getMap().valueAt(ip);
		final int NA = apps.size();
		for (int ia = 0; ia < NA; ia++) {
		final ProcessRecord app = apps.valueAt(ia);
		if (app.removed) {
		procs.add(app);
		} else if ((minTargetSdk < 0 \|\| app.info.targetSdkVersion < minTargetSdk)
		&& (maxProcState < 0 \|\| app.setProcState > maxProcState)) {
		app.removed = true;
		procs.add(app);
		}
		}
		}

		final int N = procs.size();
		for (int i = 0; i < N; i++) {
		removeProcessLocked(procs.get(i), false, true, "kill all background except");
		}
		}
		} finally {
		Binder.restoreCallingIdentity(callingId);
		}
		}

		@Override
		public void forceStopPackage(final String packageName, int userId) {
		if (checkCallingPermission(android.Manifest.permission.FORCE_STOP_PACKAGES)
		@@ -18056,7 +18090,8 @@ public final class ActivityManagerService extends ActivityManagerNative

		final boolean isDensityChange = (changes & ActivityInfo.CONFIG_DENSITY) != 0;
		if (isDensityChange) {
		killAllBackgroundProcesses(Build.VERSION_CODES.N);
		killAllBackgroundProcessesExcept(Build.VERSION_CODES.N,
		ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE);
		}

		for (int i=mLruProcesses.size()-1; i>=0; i--) {