Merge "Camera: Dump stack traces at cameraserver watchdog" into main (97ea5f66) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/camera/CameraServiceProxy.java

+107 −0

Original line number	Diff line number	Diff line
		@@ -57,6 +57,7 @@ import android.hardware.devicestate.DeviceStateManager.FoldStateListener;
		import android.hardware.display.DisplayManager;
		import android.hardware.usb.UsbDevice;
		import android.hardware.usb.UsbManager;
		import android.hidl.manager.V1_0.IServiceManager;
		import android.media.AudioManager;
		import android.nfc.NfcAdapter;
		import android.nfc.NfcManager;
		@@ -68,6 +69,8 @@ import android.os.Message;
		import android.os.Process;
		import android.os.RemoteException;
		import android.os.ResultReceiver;
		import android.os.ServiceDebugInfo;
		import android.os.ServiceManager;
		import android.os.ShellCallback;
		import android.os.ShellCommand;
		import android.os.SystemClock;
		@@ -93,6 +96,7 @@ import com.android.internal.util.FrameworkStatsLog;
		import com.android.server.LocalServices;
		import com.android.server.ServiceThread;
		import com.android.server.SystemService;
		import com.android.server.am.StackTracesDumpHelper;
		import com.android.server.wm.WindowManagerInternal;

		import java.io.FileDescriptor;
		@@ -103,8 +107,10 @@ import java.util.ArrayList;
		import java.util.Arrays;
		import java.util.Collection;
		import java.util.Collections;
		import java.util.HashSet;
		import java.util.List;
		import java.util.Set;
		import java.util.concurrent.CompletableFuture;
		import java.util.concurrent.ScheduledThreadPoolExecutor;
		import java.util.concurrent.TimeUnit;

		@@ -894,6 +900,11 @@ public class CameraServiceProxy extends SystemService
		}
		}

		@Override
		public void notifyWatchdog(int pid, boolean isNativePid) {
		dumpStackTraces(pid, isNativePid);
		}

		@Override
		public void onShellCommand(FileDescriptor in, FileDescriptor out, FileDescriptor err,
		String[] args, ShellCallback callback, ResultReceiver resultReceiver)
		@@ -1563,4 +1574,100 @@ public class CameraServiceProxy extends SystemService

		return combinationStr.toString();
		}

		// Which native services to dump into dropbox's stack traces
		private static final String[] NATIVE_SERVICES_OF_INTEREST = new String[] {
		"/system/bin/cameraserver",
		};

		// Which AIDL interfaces to dump into dropbox's stack traces
		private static final String[] AIDL_INTERFACE_PREFIXES_OF_INTEREST = new String[] {
		"android.hardware.camera.provider.ICameraProvider/",
		};

		// Which HIDL interfaces to dump into dropbox's stack traces
		public static final List<String> HIDL_INTERFACES_OF_INTEREST = Arrays.asList(
		"android.hardware.camera.provider@2.4::ICameraProvider"
		);

		private static void addHidlInterfacesOfInterest(Set<Integer> pids) {
		try {
		IServiceManager serviceManager = IServiceManager.getService();
		ArrayList<IServiceManager.InstanceDebugInfo> dump =
		serviceManager.debugDump();
		for (IServiceManager.InstanceDebugInfo info : dump) {
		if (info.pid == IServiceManager.PidConstant.NO_PID) {
		continue;
		}

		if (HIDL_INTERFACES_OF_INTEREST.contains(info.interfaceName)) {
		pids.add(info.pid);
		}
		}
		} catch (RemoteException e) {
		Slog.w(TAG, "Remote exception while querying HIDL service manager", e);
		}
		}

		private static boolean matchesAidlInterfacePrefixes(
		String[] interfacePrefixes, String interfaceName) {
		for (String prefix : interfacePrefixes) {
		if (interfaceName.startsWith(prefix)) {
		return true;
		}
		}
		return false;
		}

		private static void addAidlInterfacesOfInterest(Set<Integer> pids) {
		ServiceDebugInfo[] infos = ServiceManager.getServiceDebugInfo();
		if (infos == null) return;

		for (ServiceDebugInfo info : infos) {
		if (matchesAidlInterfacePrefixes(
		AIDL_INTERFACE_PREFIXES_OF_INTEREST, info.name)) {
		pids.add(info.debugPid);
		}
		}
		}

		/**
		* Find the camera native Pids to dump stack traces.
		*/
		private static Set<Integer> getRelevantNativePids() {
		HashSet<Integer> pids = new HashSet<Integer>();
		addHidlInterfacesOfInterest(pids);
		addAidlInterfacesOfInterest(pids);

		int[] nativePids = Process.getPidsForCommands(NATIVE_SERVICES_OF_INTEREST);
		if (nativePids != null) {
		for (int i : nativePids) {
		pids.add(i);
		}
		}

		return pids;
		}

		/**
		* A helper function to call StackTracesDumpHelper.dumpStackTraces().
		*/
		private static void dumpStackTraces(int pid, boolean isNativePid) {
		ArrayList<Integer> dalvikPids = new ArrayList<>();
		ArrayList<Integer> nativePids = new ArrayList<>();
		if (isNativePid) {
		nativePids.add(pid);
		} else {
		dalvikPids.add(pid);
		}

		nativePids.addAll(getRelevantNativePids());

		StackTracesDumpHelper.dumpStackTraces(dalvikPids,
		/* processCpuTracker= /null, / lastPids= */null,
		CompletableFuture.completedFuture(nativePids),
		/* logExceptionCreatingFile= /null, / subject= */null,
		/* criticalEventSection= /null, / extraHeaders= */ null,
		Runnable::run, /* latencyTracker= */null);
		}
		}