（六十五）Android O StartService的 anr timeout 流程分析
2024-05-14 15:40:39
前言：之前在（六十四）Android O Service启动流程梳理——startService 梳理了startService的一般流程，anr的没有涉及，本篇就以anr的为关注点梳理下流程。
参考：
1. ANR源码分析之Service Timeout
2.（六十四）Android O Service启动流程梳理——startService
1. service anr关键方法
简单来说service调用onCreate或者onStartCommand之前会延迟发送一个timeout消息，延时为20s或者200s，然后执行完了之后会移除掉该timeout消息，如果不能及时移除，则处理timeout消息，导致service anr。
ActiveServices.java
bumpServiceExecutingLocked:发送timeout消息
private final void bumpServiceExecutingLocked(ServiceRecord r, boolean fg, String why) {if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, ">>> EXECUTING "+ why + " of " + r + " in app " + r.app);else if (DEBUG_SERVICE_EXECUTING) Slog.v(TAG_SERVICE_EXECUTING, ">>> EXECUTING "+ why + " of " + r.shortName);long now = SystemClock.uptimeMillis();if (r.executeNesting == 0) {r.executeFg = fg;ServiceState stracker = r.getTracker();if (stracker != null) {stracker.setExecuting(true, mAm.mProcessStats.getMemFactorLocked(), now);}if (r.app != null) {r.app.executingServices.add(r);r.app.execServicesFg |= fg;if (r.app.executingServices.size() == 1) {scheduleServiceTimeoutLocked(r.app);}}} else if (r.app != null && fg && !r.app.execServicesFg) {r.app.execServicesFg = true;scheduleServiceTimeoutLocked(r.app);}r.executeFg |= fg;r.executeNesting++;r.executingStart = now;} void scheduleServiceTimeoutLocked(ProcessRecord proc) {if (proc.executingServices.size() == 0 || proc.thread == null) {return;}Message msg = mAm.mHandler.obtainMessage(ActivityManagerService.SERVICE_TIMEOUT_MSG);msg.obj = proc;mAm.mHandler.sendMessageDelayed(msg,proc.execServicesFg ? SERVICE_TIMEOUT : SERVICE_BACKGROUND_TIMEOUT);}serviceDoneExecutingLocked:移除timeout消息
private void serviceDoneExecutingLocked(ServiceRecord r, boolean inDestroying,boolean finishing) {if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "<<< DONE EXECUTING " + r+ ": nesting=" + r.executeNesting+ ", inDestroying=" + inDestroying + ", app=" + r.app);else if (DEBUG_SERVICE_EXECUTING) Slog.v(TAG_SERVICE_EXECUTING,"<<< DONE EXECUTING " + r.shortName);r.executeNesting--;if (r.executeNesting <= 0) {if (r.app != null) {if (DEBUG_SERVICE) Slog.v(TAG_SERVICE,"Nesting at 0 of " + r.shortName);r.app.execServicesFg = false;r.app.executingServices.remove(r);if (r.app.executingServices.size() == 0) {if (DEBUG_SERVICE || DEBUG_SERVICE_EXECUTING) Slog.v(TAG_SERVICE_EXECUTING,"No more executingServices of " + r.shortName);mAm.mHandler.removeMessages(ActivityManagerService.SERVICE_TIMEOUT_MSG, r.app);} else if (r.executeFg) {// Need to re-evaluate whether the app still needs to be in the foreground.for (int i=r.app.executingServices.size()-1; i>=0; i--) {if (r.app.executingServices.valueAt(i).executeFg) {r.app.execServicesFg = true;break;}}}if (inDestroying) {if (DEBUG_SERVICE) Slog.v(TAG_SERVICE,"doneExecuting remove destroying " + r);mDestroyingServices.remove(r);r.bindings.clear();}mAm.updateOomAdjLocked(r.app, true);}r.executeFg = false;if (r.tracker != null) {r.tracker.setExecuting(false, mAm.mProcessStats.getMemFactorLocked(),SystemClock.uptimeMillis());if (finishing) {r.tracker.clearCurrentOwner(r, false);r.tracker = null;}}if (finishing) {if (r.app != null && !r.app.persistent) {r.app.services.remove(r);if (r.whitelistManager) {updateWhitelistManagerLocked(r.app);}}r.app = null;}}}这个移除timeout消息的方法会判断executeNesting这个值是否小于等于0，也就是说如果onStartCommand多次调用，多个任务加起来的延续时间也必须小于20s/200s，而不是累加的，待写个demo验证下。
2. 流程梳理完善
之前分析流程的时序图如下：
现在加上anr timeout相关的逻辑细化一下。
2.1 onCreate流程
2.1.1 发送timeout
ActiveServices.java
private final void realStartServiceLocked(ServiceRecord r,ProcessRecord app, boolean execInFg) throws RemoteException {if (app.thread == null) {throw new RemoteException();}if (DEBUG_MU)Slog.v(TAG_MU, "realStartServiceLocked, ServiceRecord.uid = " + r.appInfo.uid+ ", ProcessRecord.uid = " + app.uid);r.app = app;r.restartTime = r.lastActivity = SystemClock.uptimeMillis();final boolean newService = app.services.add(r);bumpServiceExecutingLocked(r, execInFg, "create");bumpServiceExecutingLocked(r, execInFg, "create"); private final void bumpServiceExecutingLocked(ServiceRecord r, boolean fg, String why) {if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, ">>> EXECUTING "+ why + " of " + r + " in app " + r.app);else if (DEBUG_SERVICE_EXECUTING) Slog.v(TAG_SERVICE_EXECUTING, ">>> EXECUTING "+ why + " of " + r.shortName);long now = SystemClock.uptimeMillis();if (r.executeNesting == 0) {r.executeFg = fg;ServiceState stracker = r.getTracker();if (stracker != null) {stracker.setExecuting(true, mAm.mProcessStats.getMemFactorLocked(), now);}if (r.app != null) {r.app.executingServices.add(r);r.app.execServicesFg |= fg;if (r.app.executingServices.size() == 1) {scheduleServiceTimeoutLocked(r.app);}}} else if (r.app != null && fg && !r.app.execServicesFg) {r.app.execServicesFg = true;scheduleServiceTimeoutLocked(r.app);}r.executeFg |= fg;r.executeNesting++;r.executingStart = now;} void scheduleServiceTimeoutLocked(ProcessRecord proc) {if (proc.executingServices.size() == 0 || proc.thread == null) {return;}Message msg = mAm.mHandler.obtainMessage(ActivityManagerService.SERVICE_TIMEOUT_MSG);msg.obj = proc;mAm.mHandler.sendMessageDelayed(msg,proc.execServicesFg ? SERVICE_TIMEOUT : SERVICE_BACKGROUND_TIMEOUT);}2.1.2 移除timeout消息
realStartServiceLocked->scheduleCreateService->handleCreateService->onCreate就不重复梳理了，看onCreate方法。
ActivityThread.java
private void handleCreateService(CreateServiceData data) {// If we are getting ready to gc after going to the background, well// we are back active so skip it.unscheduleGcIdler();LoadedApk packageInfo = getPackageInfoNoCheck(data.info.applicationInfo, data.compatInfo);Service service = null;try {java.lang.ClassLoader cl = packageInfo.getClassLoader();service = (Service) cl.loadClass(data.info.name).newInstance();} catch (Exception e) {if (!mInstrumentation.onException(service, e)) {throw new RuntimeException("Unable to instantiate service " + data.info.name+ ": " + e.toString(), e);}}try {if (localLOGV) Slog.v(TAG, "Creating service " + data.info.name);ContextImpl context = ContextImpl.createAppContext(this, packageInfo);context.setOuterContext(service);Application app = packageInfo.makeApplication(false, mInstrumentation);service.attach(context, this, data.info.name, data.token, app,ActivityManager.getService());service.onCreate();mServices.put(data.token, service);try {ActivityManager.getService().serviceDoneExecuting(data.token, SERVICE_DONE_EXECUTING_ANON, 0, 0);} catch (RemoteException e) {throw e.rethrowFromSystemServer();}} catch (Exception e) {if (!mInstrumentation.onException(service, e)) {throw new RuntimeException("Unable to create service " + data.info.name+ ": " + e.toString(), e);}}}service.onCreate();mServices.put(data.token, service);try {ActivityManager.getService().serviceDoneExecuting(data.token, SERVICE_DONE_EXECUTING_ANON, 0, 0);} catch (RemoteException e) {throw e.rethrowFromSystemServer();}} catch (Exception e) {if (!mInstrumentation.onException(service, e)) {throw new RuntimeException("Unable to create service " + data.info.name+ ": " + e.toString(), e);}}}ActivityManagerService
public void serviceDoneExecuting(IBinder token, int type, int startId, int res) {synchronized(this) {if (!(token instanceof ServiceRecord)) {Slog.e(TAG, "serviceDoneExecuting: Invalid service token=" + token);throw new IllegalArgumentException("Invalid service token");}mServices.serviceDoneExecutingLocked((ServiceRecord)token, type, startId, res);}} ActiveServices.java
void serviceDoneExecutingLocked(ServiceRecord r, int type, int startId, int res) {boolean inDestroying = mDestroyingServices.contains(r);if (r != null) {if (type == ActivityThread.SERVICE_DONE_EXECUTING_START) {// This is a call from a service start... take care of// book-keeping.r.callStart = true;switch (res) {case Service.START_STICKY_COMPATIBILITY:case Service.START_STICKY: {// We are done with the associated start arguments.r.findDeliveredStart(startId, true);// Don't stop if killed.r.stopIfKilled = false;break;}case Service.START_NOT_STICKY: {// We are done with the associated start arguments.r.findDeliveredStart(startId, true);if (r.getLastStartId() == startId) {// There is no more work, and this service// doesn't want to hang around if killed.r.stopIfKilled = true;}break;}case Service.START_REDELIVER_INTENT: {// We'll keep this item until they explicitly// call stop for it, but keep track of the fact// that it was delivered.ServiceRecord.StartItem si = r.findDeliveredStart(startId, false);if (si != null) {si.deliveryCount = 0;si.doneExecutingCount++;// Don't stop if killed.r.stopIfKilled = true;}break;}case Service.START_TASK_REMOVED_COMPLETE: {// Special processing for onTaskRemoved(). Don't// impact normal onStartCommand() processing.r.findDeliveredStart(startId, true);break;}default:throw new IllegalArgumentException("Unknown service start result: " + res);}if (res == Service.START_STICKY_COMPATIBILITY) {r.callStart = false;}} else if (type == ActivityThread.SERVICE_DONE_EXECUTING_STOP) {// This is the final call from destroying the service... we should// actually be getting rid of the service at this point. Do some// validation of its state, and ensure it will be fully removed.if (!inDestroying) {// Not sure what else to do with this... if it is not actually in the// destroying list, we don't need to make sure to remove it from it.// If the app is null, then it was probably removed because the process died,// otherwise wtfif (r.app != null) {Slog.w(TAG, "Service done with onDestroy, but not inDestroying: "+ r + ", app=" + r.app);}} else if (r.executeNesting != 1) {Slog.w(TAG, "Service done with onDestroy, but executeNesting="+ r.executeNesting + ": " + r);// Fake it to keep from ANR due to orphaned entry.r.executeNesting = 1;}}final long origId = Binder.clearCallingIdentity();serviceDoneExecutingLocked(r, inDestroying, inDestroying);Binder.restoreCallingIdentity(origId);} else {Slog.w(TAG, "Done executing unknown service from pid "+ Binder.getCallingPid());}} private void serviceDoneExecutingLocked(ServiceRecord r, boolean inDestroying,boolean finishing) {if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "<<< DONE EXECUTING " + r+ ": nesting=" + r.executeNesting+ ", inDestroying=" + inDestroying + ", app=" + r.app);else if (DEBUG_SERVICE_EXECUTING) Slog.v(TAG_SERVICE_EXECUTING,"<<< DONE EXECUTING " + r.shortName);r.executeNesting--;if (r.executeNesting <= 0) {if (r.app != null) {if (DEBUG_SERVICE) Slog.v(TAG_SERVICE,"Nesting at 0 of " + r.shortName);r.app.execServicesFg = false;r.app.executingServices.remove(r);if (r.app.executingServices.size() == 0) {if (DEBUG_SERVICE || DEBUG_SERVICE_EXECUTING) Slog.v(TAG_SERVICE_EXECUTING,"No more executingServices of " + r.shortName);mAm.mHandler.removeMessages(ActivityManagerService.SERVICE_TIMEOUT_MSG, r.app);} else if (r.executeFg) {// Need to re-evaluate whether the app still needs to be in the foreground.for (int i=r.app.executingServices.size()-1; i>=0; i--) {if (r.app.executingServices.valueAt(i).executeFg) {r.app.execServicesFg = true;break;}}}if (inDestroying) {if (DEBUG_SERVICE) Slog.v(TAG_SERVICE,"doneExecuting remove destroying " + r);mDestroyingServices.remove(r);r.bindings.clear();}mAm.updateOomAdjLocked(r.app, true);}r.executeFg = false;if (r.tracker != null) {r.tracker.setExecuting(false, mAm.mProcessStats.getMemFactorLocked(),SystemClock.uptimeMillis());if (finishing) {r.tracker.clearCurrentOwner(r, false);r.tracker = null;}}if (finishing) {if (r.app != null && !r.app.persistent) {r.app.services.remove(r);if (r.whitelistManager) {updateWhitelistManagerLocked(r.app);}}r.app = null;}}}mAm.mHandler.removeMessages(ActivityManagerService.SERVICE_TIMEOUT_MSG, r.app);} else if (r.executeFg) {// Need to re-evaluate whether the app still needs to be in the foreground.for (int i=r.app.executingServices.size()-1; i>=0; i--) {if (r.app.executingServices.valueAt(i).executeFg) {r.app.execServicesFg = true;break;}}}if (inDestroying) {if (DEBUG_SERVICE) Slog.v(TAG_SERVICE,"doneExecuting remove destroying " + r);mDestroyingServices.remove(r);r.bindings.clear();}mAm.updateOomAdjLocked(r.app, true);}r.executeFg = false;if (r.tracker != null) {r.tracker.setExecuting(false, mAm.mProcessStats.getMemFactorLocked(),SystemClock.uptimeMillis());if (finishing) {r.tracker.clearCurrentOwner(r, false);r.tracker = null;}}if (finishing) {if (r.app != null && !r.app.persistent) {r.app.services.remove(r);if (r.whitelistManager) {updateWhitelistManagerLocked(r.app);}}r.app = null;}}}2.2 onStartCommand流程
流程和onCreate类似，不赘述了。
private final void sendServiceArgsLocked(ServiceRecord r, boolean execInFg,boolean oomAdjusted) throws TransactionTooLargeException {final int N = r.pendingStarts.size();if (N == 0) {return;}ArrayList<ServiceStartArgs> args = new ArrayList<>();while (r.pendingStarts.size() > 0) {ServiceRecord.StartItem si = r.pendingStarts.remove(0);if (DEBUG_SERVICE) {Slog.v(TAG_SERVICE, "Sending arguments to: "+ r + " " + r.intent + " args=" + si.intent);}if (si.intent == null && N > 1) {// If somehow we got a dummy null intent in the middle,// then skip it. DO NOT skip a null intent when it is// the only one in the list -- this is to support the// onStartCommand(null) case.continue;}si.deliveredTime = SystemClock.uptimeMillis();r.deliveredStarts.add(si);si.deliveryCount++;if (si.neededGrants != null) {mAm.grantUriPermissionUncheckedFromIntentLocked(si.neededGrants,si.getUriPermissionsLocked());}mAm.grantEphemeralAccessLocked(r.userId, si.intent,r.appInfo.uid, UserHandle.getAppId(si.callingId));bumpServiceExecutingLocked(r, execInFg, "start");bumpServiceExecutingLocked(r, execInFg, "start");...
private void handleServiceArgs(ServiceArgsData data) {Service s = mServices.get(data.token);if (s != null) {try {if (data.args != null) {data.args.setExtrasClassLoader(s.getClassLoader());data.args.prepareToEnterProcess();}int res;if (!data.taskRemoved) {res = s.onStartCommand(data.args, data.flags, data.startId);} else {s.onTaskRemoved(data.args);res = Service.START_TASK_REMOVED_COMPLETE;}QueuedWork.waitToFinish();try {
ActivityManager.getService().serviceDoneExecuting(data.token, SERVICE_DONE_EXECUTING_START, data.startId, res);} catch (RemoteException e) {throw e.rethrowFromSystemServer();}ensureJitEnabled();} catch (Exception e) {if (!mInstrumentation.onException(s, e)) {throw new RuntimeException("Unable to start service " + s+ " with " + data.args + ": " + e.toString(), e);}}}}res = s.onStartCommand(data.args, data.flags, data.startId);} else {s.onTaskRemoved(data.args);res = Service.START_TASK_REMOVED_COMPLETE;}QueuedWork.waitToFinish();try {
ActivityManager.getService().serviceDoneExecuting(data.token, SERVICE_DONE_EXECUTING_START, data.startId, res);} catch (RemoteException e) {throw e.rethrowFromSystemServer();}ensureJitEnabled();} catch (Exception e) {if (!mInstrumentation.onException(s, e)) {throw new RuntimeException("Unable to start service " + s+ " with " + data.args + ": " + e.toString(), e);}}}}2.3 AMS如何处理timeout消息
AMS:
case SERVICE_TIMEOUT_MSG: {mServices.serviceTimeout((ProcessRecord)msg.obj);}ActiveServices.java
void serviceTimeout(ProcessRecord proc) {String anrMessage = null;synchronized(mAm) {if (proc.executingServices.size() == 0 || proc.thread == null) {return;}final long now = SystemClock.uptimeMillis();final long maxTime = now -(proc.execServicesFg ? SERVICE_TIMEOUT : SERVICE_BACKGROUND_TIMEOUT);ServiceRecord timeout = null;long nextTime = 0;for (int i=proc.executingServices.size()-1; i>=0; i--) {ServiceRecord sr = proc.executingServices.valueAt(i);if (sr.executingStart < maxTime) {timeout = sr;break;}if (sr.executingStart > nextTime) {nextTime = sr.executingStart;}}if (timeout != null && mAm.mLruProcesses.contains(proc)) {Slog.w(TAG, "Timeout executing service: " + timeout);StringWriter sw = new StringWriter();PrintWriter pw = new FastPrintWriter(sw, false, 1024);pw.println(timeout);timeout.dump(pw, " ");pw.close();mLastAnrDump = sw.toString();mAm.mHandler.removeCallbacks(mLastAnrDumpClearer);mAm.mHandler.postDelayed(mLastAnrDumpClearer, LAST_ANR_LIFETIME_DURATION_MSECS);anrMessage = "executing service " + timeout.shortName;} else {Message msg = mAm.mHandler.obtainMessage(ActivityManagerService.SERVICE_TIMEOUT_MSG);msg.obj = proc;mAm.mHandler.sendMessageAtTime(msg, proc.execServicesFg? (nextTime+SERVICE_TIMEOUT) : (nextTime + SERVICE_BACKGROUND_TIMEOUT));}}if (anrMessage != null) {mAm.mAppErrors.appNotResponding(proc, null, null, false, anrMessage);}}AppErrors
final void appNotResponding(ProcessRecord app, ActivityRecord activity,ActivityRecord parent, boolean aboveSystem, final String annotation) {ArrayList<Integer> firstPids = new ArrayList<Integer>(5);SparseArray<Boolean> lastPids = new SparseArray<Boolean>(20);if (mService.mController != null) {try {// 0 == continue, -1 = kill process immediatelyint res = mService.mController.appEarlyNotResponding(app.processName, app.pid, annotation);if (res < 0 && app.pid != MY_PID) {app.kill("anr", true);}} catch (RemoteException e) {mService.mController = null;Watchdog.getInstance().setActivityController(null);}}long anrTime = SystemClock.uptimeMillis();if (ActivityManagerService.MONITOR_CPU_USAGE) {mService.updateCpuStatsNow();}// Unless configured otherwise, swallow ANRs in background processes & kill the process.boolean showBackground = Settings.Secure.getInt(mContext.getContentResolver(),Settings.Secure.ANR_SHOW_BACKGROUND, 0) != 0;boolean isSilentANR;synchronized (mService) {// PowerManager.reboot() can block for a long time, so ignore ANRs while shutting down.if (mService.mShuttingDown) {Slog.i(TAG, "During shutdown skipping ANR: " + app + " " + annotation);return;} else if (app.notResponding) {Slog.i(TAG, "Skipping duplicate ANR: " + app + " " + annotation);return;} else if (app.crashing) {Slog.i(TAG, "Crashing app skipping ANR: " + app + " " + annotation);return;} else if (app.killedByAm) {Slog.i(TAG, "App already killed by AM skipping ANR: " + app + " " + annotation);return;} else if (app.killed) {Slog.i(TAG, "Skipping died app ANR: " + app + " " + annotation);return;}// In case we come through here for the same app before completing// this one, mark as anring now so we will bail out.app.notResponding = true;// Log the ANR to the event log.EventLog.writeEvent(EventLogTags.AM_ANR, app.userId, app.pid,app.processName, app.info.flags, annotation);// Dump thread traces as quickly as we can, starting with "interesting" processes.firstPids.add(app.pid);// Don't dump other PIDs if it's a background ANRisSilentANR = !showBackground && !isInterestingForBackgroundTraces(app);if (!isSilentANR) {int parentPid = app.pid;if (parent != null && parent.app != null && parent.app.pid > 0) {parentPid = parent.app.pid;}if (parentPid != app.pid) firstPids.add(parentPid);if (MY_PID != app.pid && MY_PID != parentPid) firstPids.add(MY_PID);for (int i = mService.mLruProcesses.size() - 1; i >= 0; i--) {ProcessRecord r = mService.mLruProcesses.get(i);if (r != null && r.thread != null) {int pid = r.pid;if (pid > 0 && pid != app.pid && pid != parentPid && pid != MY_PID) {if (r.persistent) {firstPids.add(pid);if (DEBUG_ANR) Slog.i(TAG, "Adding persistent proc: " + r);} else if (r.treatLikeActivity) {firstPids.add(pid);if (DEBUG_ANR) Slog.i(TAG, "Adding likely IME: " + r);} else {lastPids.put(pid, Boolean.TRUE);if (DEBUG_ANR) Slog.i(TAG, "Adding ANR proc: " + r);}}}}}}// Log the ANR to the main log.StringBuilder info = new StringBuilder();info.setLength(0);info.append("ANR in ").append(app.processName);if (activity != null && activity.shortComponentName != null) {info.append(" (").append(activity.shortComponentName).append(")");}info.append("\n");info.append("PID: ").append(app.pid).append("\n");if (annotation != null) {info.append("Reason: ").append(annotation).append("\n");}if (parent != null && parent != activity) {info.append("Parent: ").append(parent.shortComponentName).append("\n");}ProcessCpuTracker processCpuTracker = new ProcessCpuTracker(true);// don't dump native PIDs for background ANRs unless it is the process of interestString[] nativeProcs = null;if (isSilentANR) {for (int i = 0; i < NATIVE_STACKS_OF_INTEREST.length; i++) {if (NATIVE_STACKS_OF_INTEREST[i].equals(app.processName)) {nativeProcs = new String[] { app.processName };break;}}} else {nativeProcs = NATIVE_STACKS_OF_INTEREST;}int[] pids = nativeProcs == null ? null : Process.getPidsForCommands(nativeProcs);ArrayList<Integer> nativePids = null;if (pids != null) {nativePids = new ArrayList<Integer>(pids.length);for (int i : pids) {nativePids.add(i);}}// For background ANRs, don't pass the ProcessCpuTracker to// avoid spending 1/2 second collecting stats to rank lastPids.File tracesFile = ActivityManagerService.dumpStackTraces(true, firstPids,(isSilentANR) ? null : processCpuTracker,(isSilentANR) ? null : lastPids,nativePids);String cpuInfo = null;if (ActivityManagerService.MONITOR_CPU_USAGE) {mService.updateCpuStatsNow();synchronized (mService.mProcessCpuTracker) {cpuInfo = mService.mProcessCpuTracker.printCurrentState(anrTime);}info.append(processCpuTracker.printCurrentLoad());info.append(cpuInfo);}info.append(processCpuTracker.printCurrentState(anrTime));Slog.e(TAG, info.toString());if (tracesFile == null) {// There is no trace file, so dump (only) the alleged culprit's threads to the logProcess.sendSignal(app.pid, Process.SIGNAL_QUIT);}mService.addErrorToDropBox("anr", app, app.processName, activity, parent, annotation,cpuInfo, tracesFile, null);if (mService.mController != null) {try {// 0 == show dialog, 1 = keep waiting, -1 = kill process immediatelyint res = mService.mController.appNotResponding(app.processName, app.pid, info.toString());if (res != 0) {if (res < 0 && app.pid != MY_PID) {app.kill("anr", true);} else {synchronized (mService) {mService.mServices.scheduleServiceTimeoutLocked(app);}}return;}} catch (RemoteException e) {mService.mController = null;Watchdog.getInstance().setActivityController(null);}}synchronized (mService) {mService.mBatteryStatsService.noteProcessAnr(app.processName, app.uid);if (isSilentANR) {app.kill("bg anr", true);return;}// Set the app's notResponding state, and look up the errorReportReceivermakeAppNotRespondingLocked(app,activity != null ? activity.shortComponentName : null,annotation != null ? "ANR " + annotation : "ANR",info.toString());// Bring up the infamous App Not Responding dialogMessage msg = Message.obtain();HashMap<String, Object> map = new HashMap<String, Object>();msg.what = ActivityManagerService.SHOW_NOT_RESPONDING_UI_MSG;msg.obj = map;msg.arg1 = aboveSystem ? 1 : 0;map.put("app", app);if (activity != null) {map.put("activity", activity);}mService.mUiHandler.sendMessage(msg);}}info.append("ANR in ").append(app.processName);if (activity != null && activity.shortComponentName != null) {info.append(" (").append(activity.shortComponentName).append(")");}info.append("\n");info.append("PID: ").append(app.pid).append("\n");if (annotation != null) {info.append("Reason: ").append(annotation).append("\n");}if (parent != null && parent != activity) {info.append("Parent: ").append(parent.shortComponentName).append("\n");}ProcessCpuTracker processCpuTracker = new ProcessCpuTracker(true);// don't dump native PIDs for background ANRs unless it is the process of interestString[] nativeProcs = null;if (isSilentANR) {for (int i = 0; i < NATIVE_STACKS_OF_INTEREST.length; i++) {if (NATIVE_STACKS_OF_INTEREST[i].equals(app.processName)) {nativeProcs = new String[] { app.processName };break;}}} else {nativeProcs = NATIVE_STACKS_OF_INTEREST;}int[] pids = nativeProcs == null ? null : Process.getPidsForCommands(nativeProcs);ArrayList<Integer> nativePids = null;if (pids != null) {nativePids = new ArrayList<Integer>(pids.length);for (int i : pids) {nativePids.add(i);}}// For background ANRs, don't pass the ProcessCpuTracker to// avoid spending 1/2 second collecting stats to rank lastPids.File tracesFile = ActivityManagerService.dumpStackTraces(true, firstPids,(isSilentANR) ? null : processCpuTracker,(isSilentANR) ? null : lastPids,nativePids);String cpuInfo = null;if (ActivityManagerService.MONITOR_CPU_USAGE) {mService.updateCpuStatsNow();synchronized (mService.mProcessCpuTracker) {cpuInfo = mService.mProcessCpuTracker.printCurrentState(anrTime);}info.append(processCpuTracker.printCurrentLoad());info.append(cpuInfo);}info.append(processCpuTracker.printCurrentState(anrTime));Slog.e(TAG, info.toString());if (tracesFile == null) {// There is no trace file, so dump (only) the alleged culprit's threads to the logProcess.sendSignal(app.pid, Process.SIGNAL_QUIT);}mService.addErrorToDropBox("anr", app, app.processName, activity, parent, annotation,cpuInfo, tracesFile, null);if (mService.mController != null) {try {// 0 == show dialog, 1 = keep waiting, -1 = kill process immediatelyint res = mService.mController.appNotResponding(app.processName, app.pid, info.toString());if (res != 0) {if (res < 0 && app.pid != MY_PID) {app.kill("anr", true);} else {synchronized (mService) {mService.mServices.scheduleServiceTimeoutLocked(app);}}return;}} catch (RemoteException e) {mService.mController = null;Watchdog.getInstance().setActivityController(null);}}synchronized (mService) {mService.mBatteryStatsService.noteProcessAnr(app.processName, app.uid);if (isSilentANR) {app.kill("bg anr", true);return;}// Set the app's notResponding state, and look up the errorReportReceivermakeAppNotRespondingLocked(app,activity != null ? activity.shortComponentName : null,annotation != null ? "ANR " + annotation : "ANR",info.toString());// Bring up the infamous App Not Responding dialogMessage msg = Message.obtain();HashMap<String, Object> map = new HashMap<String, Object>();msg.what = ActivityManagerService.SHOW_NOT_RESPONDING_UI_MSG;msg.obj = map;msg.arg1 = aboveSystem ? 1 : 0;map.put("app", app);if (activity != null) {map.put("activity", activity);}mService.mUiHandler.sendMessage(msg);}}（六十五）Android O StartService的 anr timeout 流程分析相关推荐
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