Merge "Trace coroutine section name generation" into main (3b9dbb08) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/lifecycle/RepeatWhenAttached.kt

+16 −10

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@

		package com.android.systemui.lifecycle

		import android.os.Trace
		import android.view.View
		import android.view.ViewTreeObserver
		import androidx.annotation.MainThread
		@@ -73,7 +74,7 @@ fun View.repeatWhenAttached(
		Dispatchers.Main + createCoroutineTracingContext() + coroutineContext
		val traceName =
		if (Compile.IS_DEBUG && coroutineTracing()) {
		traceSectionName()
		inferTraceSectionName()
		} else {
		DEFAULT_TRACE_NAME
		}
		@@ -197,17 +198,22 @@ private fun isFrameInteresting(frame: StackWalker.StackFrame): Boolean =
		frame.className != CURRENT_CLASS_NAME && frame.className != JAVA_ADAPTER_CLASS_NAME

		/** Get a name for the trace section include the name of the call site. */
		private fun traceSectionName(): String {
		private fun inferTraceSectionName(): String {
		try {
		Trace.traceBegin(Trace.TRACE_TAG_APP, "RepeatWhenAttachedKt#inferTraceSectionName")
		val interestingFrame =
		StackWalker.getInstance().walk { stream ->
		stream.filter(::isFrameInteresting).limit(5).findFirst()
		}
		if (interestingFrame.isPresent) {
		val frame = interestingFrame.get()
		return "${frame.className}#${frame.methodName}:${frame.lineNumber} [$DEFAULT_TRACE_NAME]"
		val f = interestingFrame.get()
		return "${f.className}#${f.methodName}:${f.lineNumber} [$DEFAULT_TRACE_NAME]"
		} else {
		return DEFAULT_TRACE_NAME
		}
		} finally {
		Trace.traceEnd(Trace.TRACE_TAG_APP)
		}
		}

		private const val DEFAULT_TRACE_NAME = "repeatWhenAttached"