Extend am profile command to also collect lowoverhead traces. (029853ac) · Commits · e / os / android_frameworks_base

core/java/android/app/ActivityThread.java

+32 −9

Original line number	Diff line number	Diff line
		@@ -6859,21 +6859,44 @@ public final class ActivityThread extends ClientTransactionHandler

		final void handleProfilerControl(boolean start, ProfilerInfo profilerInfo, int profileType) {
		if (start) {
		try {
		switch (profileType) {
		case ProfilerInfo.PROFILE_TYPE_LOW_OVERHEAD:
		if (!com.android.art.flags.Flags.alwaysEnableProfileCode()) {
		Slog.w(TAG, "Low overhead tracing feature is not enabled");
		break;
		}
		VMDebug.startLowOverheadTrace();
		break;
		default:
		try {
		mProfiler.setProfiler(profilerInfo);
		mProfiler.startProfiling();
		break;
		}
		} catch (RuntimeException e) {
		Slog.w(TAG, "Profiling failed on path " + profilerInfo.profileFile
		+ " -- can the process access this path?");
		} finally {
		profilerInfo.closeFd();
		}
		}
		} else {
		switch (profileType) {
		case ProfilerInfo.PROFILE_TYPE_LOW_OVERHEAD:
		if (!com.android.art.flags.Flags.alwaysEnableProfileCode()) {
		if (profilerInfo != null) {
		profilerInfo.closeFd();
		}
		Slog.w(TAG, "Low overhead tracing feature is not enabled");
		break;
		}
		if (profilerInfo != null) {
		FileDescriptor fd = profilerInfo.profileFd.getFileDescriptor();
		VMDebug.TraceDestination dst =
		VMDebug.TraceDestination.fromFileDescriptor(fd);
		VMDebug.dumpLowOverheadTrace(dst);
		}
		VMDebug.stopLowOverheadTrace();
		break;
		default:
		mProfiler.stopProfiling();
		break;

core/java/android/app/ProfilerInfo.java

+6 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,12 @@ import java.util.Objects;
		* {@hide}
		*/
		public class ProfilerInfo implements Parcelable {
		// Regular profiling which provides different modes of profiling at some performance cost.
		public static final int PROFILE_TYPE_REGULAR = 0;

		// Low overhead profiling that captures a simple sliding window of past events.
		public static final int PROFILE_TYPE_LOW_OVERHEAD = 1;

		// Version of the profiler output
		public static final int OUTPUT_VERSION_DEFAULT = 1;
		// CLOCK_TYPE_DEFAULT chooses the default used by ART. ART uses CLOCK_TYPE_DUAL by default (see

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

+7 −4

Original line number	Diff line number	Diff line
		@@ -7590,7 +7590,7 @@ public class ActivityManagerService extends IActivityManager.Stub
		}

		void setProfileApp(ApplicationInfo app, String processName, ProfilerInfo profilerInfo,
		ApplicationInfo sdkSandboxClientApp) {
		ApplicationInfo sdkSandboxClientApp, int profileType) {
		synchronized (mAppProfiler.mProfilerLock) {
		if (!Build.IS_DEBUGGABLE) {
		boolean isAppDebuggable = (app.flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0;
		@@ -7606,7 +7606,7 @@ public class ActivityManagerService extends IActivityManager.Stub
		+ "and not profileable by shell: " + app.packageName);
		}
		}
		mAppProfiler.setProfileAppLPf(processName, profilerInfo);
		mAppProfiler.setProfileAppLPf(processName, profilerInfo, profileType);
		}
		}

		@@ -17860,7 +17860,8 @@ public class ActivityManagerService extends IActivityManager.Stub
		+ android.Manifest.permission.SET_ACTIVITY_WATCHER);
		}

		if (start && (profilerInfo == null \|\| profilerInfo.profileFd == null)) {
		if (start && profileType == ProfilerInfo.PROFILE_TYPE_REGULAR
		&& (profilerInfo == null \|\| profilerInfo.profileFd == null)) {
		throw new IllegalArgumentException("null profile info or fd");
		}

		@@ -19476,7 +19477,9 @@ public class ActivityManagerService extends IActivityManager.Stub
		}

		if (profilerInfo != null) {
		setProfileApp(aInfo.applicationInfo, aInfo.processName, profilerInfo, null);
		// We only support normal method tracing along with app startup for now.
		setProfileApp(aInfo.applicationInfo, aInfo.processName, profilerInfo,
		null, /profileType= / ProfilerInfo.PROFILE_TYPE_REGULAR);
		}
		wmLock.notify();
		}

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

+19 −2

Original line number	Diff line number	Diff line
		@@ -1069,7 +1069,7 @@ final class ActivityManagerShellCommand extends ShellCommand {
		String profileFile = null;
		boolean start = false;
		int userId = UserHandle.USER_CURRENT;
		int profileType = 0;
		int profileType = ProfilerInfo.PROFILE_TYPE_REGULAR;
		mSamplingInterval = 0;
		mStreaming = false;
		mClockType = ProfilerInfo.CLOCK_TYPE_DEFAULT;
		@@ -1111,6 +1111,18 @@ final class ActivityManagerShellCommand extends ShellCommand {
		}
		}
		process = getNextArgRequired();
		} else if ("lowoverhead".equals(cmd)) {
		// This is an experimental low overhead profiling.
		profileType = ProfilerInfo.PROFILE_TYPE_LOW_OVERHEAD;
		cmd = getNextArgRequired();
		if ("start".equals(cmd)) {
		start = true;
		} else if ("stop".equals(cmd)) {
		start = false;
		} else {
		throw new IllegalArgumentException("Profile command not valid");
		}
		process = getNextArgRequired();
		} else {
		// Compatibility with old syntax: process is specified first.
		process = cmd;
		@@ -1130,7 +1142,12 @@ final class ActivityManagerShellCommand extends ShellCommand {
		ParcelFileDescriptor fd = null;
		ProfilerInfo profilerInfo = null;

		if (start) {
		// For regular method tracing profileFile should be provided with the start command. For
		// low overhead method tracing the profileFile is optional and provided with the stop
		// command.
		if ((start && profileType == ProfilerInfo.PROFILE_TYPE_REGULAR)
		\|\| (profileType == ProfilerInfo.PROFILE_TYPE_LOW_OVERHEAD
		&& !start && getRemainingArgsCount() > 0)) {
		profileFile = getNextArgRequired();
		fd = openFileForSystem(profileFile, "w");
		if (fd == null) {

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

+47 −28

Original line number	Diff line number	Diff line
		@@ -1990,7 +1990,7 @@ public class AppProfiler {
		}

		@GuardedBy("mProfilerLock")
		private void stopProfilerLPf(ProcessRecord proc, int profileType) {
		private void stopProfilerLPf(ProcessRecord proc, ProfilerInfo profilerInfo, int profileType) {
		if (proc == null \|\| proc == mProfileData.getProfileProc()) {
		proc = mProfileData.getProfileProc();
		profileType = mProfileType;
		@@ -2004,7 +2004,7 @@ public class AppProfiler {
		return;
		}
		try {
		thread.profilerControl(false, null, profileType);
		thread.profilerControl(false, profilerInfo, profileType);
		} catch (RemoteException e) {
		throw new IllegalStateException("Process disappeared");
		}
		@@ -2039,19 +2039,27 @@ public class AppProfiler {
		ProfilerInfo profilerInfo, int profileType) {
		try {
		if (start) {
		stopProfilerLPf(null, 0);
		boolean needsFile = (profileType == ProfilerInfo.PROFILE_TYPE_REGULAR);
		stopProfilerLPf(null, null, 0);
		mService.setProfileApp(proc.info, proc.processName, profilerInfo,
		proc.isSdkSandbox ? proc.getClientInfoForSdkSandbox() : null);
		proc.isSdkSandbox ? proc.getClientInfoForSdkSandbox() : null, profileType);
		mProfileData.setProfileProc(proc);
		mProfileType = profileType;
		ParcelFileDescriptor fd = profilerInfo.profileFd;

		ParcelFileDescriptor fd = null;
		if (needsFile) {
		fd = profilerInfo.profileFd;
		try {
		fd = fd.dup();
		} catch (IOException e) {
		fd = null;
		}
		profilerInfo.profileFd = fd;
		}

		proc.mProfile.getThread().profilerControl(start, profilerInfo, profileType);

		if (needsFile) {
		fd = null;
		try {
		mProfileData.getProfilerInfo().profileFd.close();
		@@ -2066,14 +2074,23 @@ public class AppProfiler {
		// whole ProfilerInfo instance is passed down!
		profilerInfo = null;
		}
		}
		} else {
		stopProfilerLPf(proc, profileType);
		boolean mayNeedFile = (profileType == ProfilerInfo.PROFILE_TYPE_LOW_OVERHEAD);
		if (profilerInfo != null && profilerInfo.profileFd != null) {
		ParcelFileDescriptor fd = profilerInfo.profileFd;
		try {
		profilerInfo.profileFd.close();
		if (mayNeedFile) {
		fd = fd.dup();
		} else {
		fd.close();
		}
		} catch (IOException e) {
		fd = null;
		}
		profilerInfo.profileFd = fd;
		}
		stopProfilerLPf(proc, profilerInfo, profileType);
		}

		return true;
		@@ -2090,7 +2107,7 @@ public class AppProfiler {
		}

		@GuardedBy("mProfilerLock")
		void setProfileAppLPf(String processName, ProfilerInfo profilerInfo) {
		void setProfileAppLPf(String processName, ProfilerInfo profilerInfo, int profileType) {
		mProfileData.setProfileApp(processName);

		if (mProfileData.getProfilerInfo() != null) {
		@@ -2101,8 +2118,10 @@ public class AppProfiler {
		}
		}
		}
		if (profilerInfo != null) {
		mProfileData.setProfilerInfo(new ProfilerInfo(profilerInfo));
		mProfileType = 0;
		}
		mProfileType = profileType;
		}

		@GuardedBy("mProfilerLock")