Merge "Add drop box reports of low memory." into ics-mr1

Author: Dianne Hackborn

cmds/am/src/com/android/commands/am/Am.java

@@ -109,6 +109,10 @@ private void run(String[] args) throws Exception {
             runStartService();
         } else if (op.equals("force-stop")) {
             runForceStop();
+        } else if (op.equals("kill")) {
+            runKill();
+        } else if (op.equals("kill-all")) {
+            runKillAll();
         } else if (op.equals("instrument")) {
             runInstrument();
         } else if (op.equals("broadcast")) {
@@ -484,6 +488,14 @@ private void runForceStop() throws Exception {
         mAm.forceStopPackage(nextArgRequired());
     }
 
+    private void runKill() throws Exception {
+        mAm.killBackgroundProcesses(nextArgRequired());
+    }
+
+    private void runKillAll() throws Exception {
+        mAm.killAllBackgroundProcesses();
+    }
+
     private void sendBroadcast() throws Exception {
         Intent intent = makeIntent();
         IntentReceiver receiver = new IntentReceiver();
@@ -1179,6 +1191,8 @@ private static void showUsage() {
                 "               [--R COUNT] [-S] <INTENT>\n" +
                 "       am startservice <INTENT>\n" +
                 "       am force-stop <PACKAGE>\n" +
+                "       am kill <PACKAGE>\n" +
+                "       am kill-all\n" +
                 "       am broadcast <INTENT>\n" +
                 "       am instrument [-r] [-e <NAME> <VALUE>] [-p <FILE>] [-w]\n" +
                 "               [--no-window-animation] <COMPONENT>\n" +
@@ -1202,6 +1216,12 @@ private static void showUsage() {
                 "\n" +
                 "am force-stop: force stop everything associated with <PACKAGE>.\n" +
                 "\n" +
+                "am kill: Kill all processes associated with <PACKAGE>.  Only kills.\n" +
+                "  processes that are safe to kill -- that is, will not impact the user\n" +
+                "  experience.\n" +
+                "\n" +
+                "am kill-all: Kill all background processes.\n" +
+                "\n" +
                 "am broadcast: send a broadcast Intent.\n" +
                 "\n" +
                 "am instrument: start an Instrumentation.  Typically this target <COMPONENT>\n" +

core/java/android/app/ActivityManagerNative.java

@@ -1092,6 +1092,13 @@ public boolean onTransact(int code, Parcel data, Parcel reply, int flags)
             reply.writeNoException();
             return true;
         }
+
+        case KILL_ALL_BACKGROUND_PROCESSES_TRANSACTION: {
+            data.enforceInterface(IActivityManager.descriptor);
+            killAllBackgroundProcesses();
+            reply.writeNoException();
+            return true;
+        }
 
         case FORCE_STOP_PACKAGE_TRANSACTION: {
             data.enforceInterface(IActivityManager.descriptor);
@@ -2906,7 +2913,7 @@ public void signalPersistentProcesses(int sig) throws RemoteException {
         data.recycle();
         reply.recycle();
     }
-    
+
     public void killBackgroundProcesses(String packageName) throws RemoteException {
         Parcel data = Parcel.obtain();
         Parcel reply = Parcel.obtain();
@@ -2917,7 +2924,17 @@ public void killBackgroundProcesses(String packageName) throws RemoteException {
         data.recycle();
         reply.recycle();
     }
-    
+
+    public void killAllBackgroundProcesses() throws RemoteException {
+        Parcel data = Parcel.obtain();
+        Parcel reply = Parcel.obtain();
+        data.writeInterfaceToken(IActivityManager.descriptor);
+        mRemote.transact(KILL_ALL_BACKGROUND_PROCESSES_TRANSACTION, data, reply, 0);
+        reply.readException();
+        data.recycle();
+        reply.recycle();
+    }
+
     public void forceStopPackage(String packageName) throws RemoteException {
         Parcel data = Parcel.obtain();
         Parcel reply = Parcel.obtain();

core/java/android/app/IActivityManager.java

@@ -234,6 +234,7 @@ public void showWaitingForDebugger(IApplicationThread who, boolean waiting)
     public void getMemoryInfo(ActivityManager.MemoryInfo outInfo) throws RemoteException;
 
     public void killBackgroundProcesses(final String packageName) throws RemoteException;
+    public void killAllBackgroundProcesses() throws RemoteException;
     public void forceStopPackage(final String packageName) throws RemoteException;
 
     // Note: probably don't want to allow applications access to these.
@@ -605,4 +606,5 @@ private WaitResult(Parcel source) {
     int GET_PROCESS_PSS_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+136;
     int SHOW_BOOT_MESSAGE_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+137;
     int DISMISS_KEYGUARD_ON_NEXT_ACTIVITY_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+138;
+    int KILL_ALL_BACKGROUND_PROCESSES_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+139;
 }

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

@@ -1220,6 +1220,8 @@ public void handleMessage(Message msg) {
                 }
                 Thread thread = new Thread() {
                     @Override public void run() {
+                        StringBuilder dropBuilder = new StringBuilder(1024);
+                        StringBuilder logBuilder = new StringBuilder(1024);
                         try {
                             java.lang.Process proc = Runtime.getRuntime().exec(new String[] {
                                     "procrank", });
@@ -1233,16 +1235,29 @@ public void handleMessage(Message msg) {
                                     break;
                                 }
                                 if (line.length() > 0) {
-                                    Slog.i(TAG, line);
+                                    logBuilder.append(line);
+                                    logBuilder.append('\n');
                                 }
+                                dropBuilder.append(line);
+                                dropBuilder.append('\n');
                             }
                             converter.close();
                         } catch (IOException e) {
                         }
                         StringWriter sw = new StringWriter();
                         PrintWriter pw = new PrintWriter(sw);
-                        dumpApplicationMemoryUsage(null, pw, "  ", new String[] { }, true);
-                        Slog.i(TAG, sw.toString());
+                        StringWriter catSw = new StringWriter();
+                        PrintWriter catPw = new PrintWriter(catSw);
+                        dumpApplicationMemoryUsage(null, pw, "  ", new String[] { }, true, catPw);
+                        String memUsage = sw.toString();
+                        dropBuilder.append('\n');
+                        dropBuilder.append(memUsage);
+                        dropBuilder.append(catSw.toString());
+                        logBuilder.append(memUsage);
+                        addErrorToDropBox("watchdog", null, "system_server", null,
+                                null, "Low on memory -- no more background processes",
+                                dropBuilder.toString(), null, null);
+                        Slog.i(TAG, logBuilder.toString());
                         synchronized (ActivityManagerService.this) {
                             long now = SystemClock.uptimeMillis();
                             if (mLastMemUsageReportTime < now) {
@@ -1394,7 +1409,7 @@ protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
                 return;
             }
 
-            mActivityManagerService.dumpApplicationMemoryUsage(fd, pw, "  ", args, false);
+            mActivityManagerService.dumpApplicationMemoryUsage(fd, pw, "  ", args, false, null);
         }
     }
 
@@ -3192,7 +3207,49 @@ public void killBackgroundProcesses(final String packageName) {
                     return;
                 }
                 killPackageProcessesLocked(packageName, pkgUid,
-                        ProcessList.SERVICE_ADJ, false, true, true, false);
+                        ProcessList.SERVICE_ADJ, false, true, true, false, "kill background");
+            }
+        } finally {
+            Binder.restoreCallingIdentity(callingId);
+        }
+    }
+
+    public void killAllBackgroundProcesses() {
+        if (checkCallingPermission(android.Manifest.permission.KILL_BACKGROUND_PROCESSES)
+                != PackageManager.PERMISSION_GRANTED) {
+            String msg = "Permission Denial: killAllBackgroundProcesses() from pid="
+                    + Binder.getCallingPid()
+                    + ", uid=" + Binder.getCallingUid()
+                    + " requires " + android.Manifest.permission.KILL_BACKGROUND_PROCESSES;
+            Slog.w(TAG, msg);
+            throw new SecurityException(msg);
+        }
+        
+        long callingId = Binder.clearCallingIdentity();
+        try {
+            synchronized(this) {
+                ArrayList<ProcessRecord> procs = new ArrayList<ProcessRecord>();
+                for (SparseArray<ProcessRecord> apps : mProcessNames.getMap().values()) {
+                    final int NA = apps.size();
+                    for (int ia=0; ia<NA; ia++) {
+                        ProcessRecord app = apps.valueAt(ia);
+                        if (app.persistent) {
+                            // we don't kill persistent processes
+                            continue;
+                        }
+                        if (app.removed) {
+                            procs.add(app);
+                        } else if (app.setAdj >= ProcessList.HIDDEN_APP_MIN_ADJ) {
+                            app.removed = true;
+                            procs.add(app);
+                        }
+                    }
+                }
+                
+                int N = procs.size();
+                for (int i=0; i<N; i++) {
+                    removeProcessLocked(procs.get(i), false, true, "kill all background");
+                }
             }
         } finally {
             Binder.restoreCallingIdentity(callingId);
@@ -3364,7 +3421,7 @@ private void forceStopPackageLocked(final String packageName, int uid) {
 
     private final boolean killPackageProcessesLocked(String packageName, int uid,
             int minOomAdj, boolean callerWillRestart, boolean allowRestart, boolean doit,
-            boolean evenPersistent) {
+            boolean evenPersistent, String reason) {
         ArrayList<ProcessRecord> procs = new ArrayList<ProcessRecord>();
 
         // Remove all processes this package may have touched: all with the
@@ -3399,7 +3456,7 @@ private final boolean killPackageProcessesLocked(String packageName, int uid,
 
         int N = procs.size();
         for (int i=0; i<N; i++) {
-            removeProcessLocked(procs.get(i), callerWillRestart, allowRestart);
+            removeProcessLocked(procs.get(i), callerWillRestart, allowRestart, reason);
         }
         return N > 0;
     }
@@ -3430,7 +3487,7 @@ private final boolean forceStopPackageLocked(String name, int uid,
         }
 
         boolean didSomething = killPackageProcessesLocked(name, uid, -100,
-                callerWillRestart, false, doit, evenPersistent);
+                callerWillRestart, false, doit, evenPersistent, "force stop");
 
         TaskRecord lastTask = null;
         for (i=0; i<mMainStack.mHistory.size(); i++) {
@@ -3518,11 +3575,11 @@ private final boolean forceStopPackageLocked(String name, int uid,
     }
 
     private final boolean removeProcessLocked(ProcessRecord app,
-            boolean callerWillRestart, boolean allowRestart) {
+            boolean callerWillRestart, boolean allowRestart, String reason) {
         final String name = app.processName;
         final int uid = app.info.uid;
         if (DEBUG_PROCESSES) Slog.d(
-            TAG, "Force removing process " + app + " (" + name
+            TAG, "Force removing proc " + app.toShortString() + " (" + name
             + "/" + uid + ")");
 
         mProcessNames.remove(name, uid);
@@ -3537,9 +3594,10 @@ private final boolean removeProcessLocked(ProcessRecord app,
                 mPidsSelfLocked.remove(pid);
                 mHandler.removeMessages(PROC_START_TIMEOUT_MSG, app);
             }
+            Slog.i(TAG, "Killing proc " + app.toShortString() + ": " + reason);
             handleAppDiedLocked(app, true, allowRestart);
             mLruProcesses.remove(app);
-            Process.killProcess(pid);
+            Process.killProcessQuiet(pid);
 
             if (app.persistent) {
                 if (!callerWillRestart) {
@@ -6846,7 +6904,7 @@ public void run() {
                 for (int i=procsToKill.size()-1; i>=0; i--) {
                     ProcessRecord proc = procsToKill.get(i);
                     Slog.i(TAG, "Removing system update proc: " + proc);
-                    removeProcessLocked(proc, true, false);
+                    removeProcessLocked(proc, true, false, "system update done");
                 }
             }
 
@@ -7042,7 +7100,7 @@ private boolean handleAppCrashLocked(ProcessRecord app) {
                 // Don't let services in this process be restarted and potentially
                 // annoy the user repeatedly.  Unless it is persistent, since those
                 // processes run critical code.
-                removeProcessLocked(app, false, false);
+                removeProcessLocked(app, false, false, "crash");
                 mMainStack.resumeTopActivityLocked(null);
                 return false;
             }
@@ -9298,8 +9356,10 @@ public int compare(MemItem lhs, MemItem rhs) {
     }
 
     final void dumpApplicationMemoryUsage(FileDescriptor fd,
-            PrintWriter pw, String prefix, String[] args, boolean brief) {
+            PrintWriter pw, String prefix, String[] args, boolean brief,
+            PrintWriter categoryPw) {
         boolean dumpAll = false;
+        boolean oomOnly = false;
 
         int opti = 0;
         while (opti < args.length) {
@@ -9310,9 +9370,12 @@ final void dumpApplicationMemoryUsage(FileDescriptor fd,
             opti++;
             if ("-a".equals(opt)) {
                 dumpAll = true;
+            } else if ("--oom".equals(opt)) {
+                oomOnly = true;
             } else if ("-h".equals(opt)) {
-                pw.println("meminfo dump options: [-a] [process]");
+                pw.println("meminfo dump options: [-a] [--oom] [process]");
                 pw.println("  -a: include all available information for each process.");
+                pw.println("  --oom: only show processes organized by oom adj.");
                 pw.println("If [process] is specified it can be the name or ");
                 pw.println("pid of a specific process to dump.");
                 return;
@@ -9438,18 +9501,19 @@ final void dumpApplicationMemoryUsage(FileDescriptor fd,
                 }
             }
 
-            if (!brief) {
+            if (!brief && !oomOnly) {
                 pw.println();
                 pw.println("Total PSS by process:");
                 dumpMemItems(pw, "  ", procMems, true);
                 pw.println();
             }
             pw.println("Total PSS by OOM adjustment:");
             dumpMemItems(pw, "  ", oomMems, false);
-            if (!brief) {
-                pw.println();
-                pw.println("Total PSS by category:");
-                dumpMemItems(pw, "  ", catMems, true);
+            if (!oomOnly) {
+                PrintWriter out = categoryPw != null ? categoryPw : pw;
+                out.println();
+                out.println("Total PSS by category:");
+                dumpMemItems(out, "  ", catMems, true);
             }
             pw.println();
             pw.print("Total PSS: "); pw.print(totalPss); pw.println(" Kb");