Merge "Revert^2 "trace-ipc: Don't hold procLock while calling out."" into main (8963bd0e) · Commits · e / os / android_frameworks_base

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

+41 −29

Original line number	Diff line number	Diff line
		@@ -16248,21 +16248,34 @@ public class ActivityManagerService extends IActivityManager.Stub

		boolean closeFd = true;
		try {
		synchronized (mProcLock) {
		if (fd == null) {
		throw new IllegalArgumentException("null fd");
		}
		mBinderTransactionTrackingEnabled = false;
		Objects.requireNonNull(fd);

		record ProcessToDump(String processName, IApplicationThread thread) { }

		PrintWriter pw = new FastPrintWriter(new FileOutputStream(fd.getFileDescriptor()));
		pw.println("Binder transaction traces for all processes.\n");
		mProcessList.forEachLruProcessesLOSP(true, process -> {
		final ArrayList<ProcessToDump> processes = new ArrayList<>();
		synchronized (mProcLock) {
		// Since dumping binder transactions is a long-running operation, we can't do it
		// with mProcLock held. Do the initial verification here, and save the processes
		// to dump later outside the lock.
		final ArrayList<ProcessRecord> unverifiedProcesses =
		new ArrayList<>(mProcessList.getLruProcessesLOSP());
		for (int i = 0, size = unverifiedProcesses.size(); i < size; i++) {
		ProcessRecord process = unverifiedProcesses.get(i);
		final IApplicationThread thread = process.getThread();
		if (!processSanityChecksLPr(process, thread)) {
		return;
		continue;
		}
		processes.add(new ProcessToDump(process.processName, process.getThread()));
		}
		mBinderTransactionTrackingEnabled = false;
		}
		for (int i = 0, size = processes.size(); i < size; i++) {
		final String processName = processes.get(i).processName();
		final IApplicationThread thread = processes.get(i).thread();

		pw.println("Traces for process: " + process.processName);
		pw.println("Traces for process: " + processName);
		pw.flush();
		try {
		TransferPipe tp = new TransferPipe();
		@@ -16273,18 +16286,17 @@ public class ActivityManagerService extends IActivityManager.Stub
		tp.kill();
		}
		} catch (IOException e) {
		pw.println("Failure while dumping IPC traces from " + process +
		pw.println("Failure while dumping IPC traces from " + processName +
		". Exception: " + e);
		pw.flush();
		} catch (RemoteException e) {
		pw.println("Got a RemoteException while dumping IPC traces from " +
		process + ". Exception: " + e);
		processName + ". Exception: " + e);
		pw.flush();
		}
		});
		}
		closeFd = false;
		return true;
		}
		} finally {
		if (fd != null && closeFd) {
		try {