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Commit 7243fd89 authored by Peter Kalauskas's avatar Peter Kalauskas
Browse files

Disable coroutine tracing on user builds 

Ensure coroutine tracing is always off on user builds. Tracing
coroutines adds overhead to each suspension and resumption point, so it
should be disabled for performance reasons unless debugging.

Bug: 348488027
Test: Inspect odex of user build
Flag: com.android.systemui.coroutine_tracing
Change-Id: I40d7a0fc5032cd9352f531c4a211ec0305030760
parent 4a696ae8

compilelib/Android.bp

+3 −0
Original line number Diff line number Diff line
@@ -44,4 +44,7 @@ java_library { 
            exclude_srcs: [":compilelib-ReleaseJavaFiles"],

        },

    },

    sdk_version: "31",

    min_sdk_version: "19",

    java_version: "17",

}

tracinglib/core/Android.bp

+2 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ java_library { 
    static_libs: [

        "kotlinx_coroutines_android",

        "com_android_systemui_flags_lib",

        "//frameworks/libs/systemui:compilelib",

    ],

    srcs: ["android/src-platform-api/**/*.kt"],

}
@@ -32,6 +33,7 @@ java_library { 
    static_libs: [

        "kotlinx_coroutines_android",

        "com_android_systemui_flags_lib",

        "//frameworks/libs/systemui:compilelib",

        "androidx.tracing_tracing",

    ],

    srcs: ["android/src-public-api/**/*.kt"],

tracinglib/core/common/src/coroutines/TraceContextElement.kt

+7 −3
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
package com.android.app.tracing.coroutines



import com.android.systemui.Flags.coroutineTracing

import com.android.systemui.util.Compile

import kotlin.coroutines.CoroutineContext

import kotlin.coroutines.EmptyCoroutineContext

import kotlinx.coroutines.CopyableThreadContextElement
@@ -47,8 +48,11 @@ private inline fun debug(message: () -> String) { 
/**

 * Returns a new [CoroutineContext] used for tracing. Used to hide internal implementation details.

 */

fun createCoroutineTracingContext(): CoroutineContext {

    return if (coroutineTracing()) TraceContextElement(TraceData()) else EmptyCoroutineContext

fun createCoroutineTracingContext(): CoroutineContext =

    if (Compile.IS_DEBUG && coroutineTracing()) {

        TraceContextElement(TraceData())

    } else {

        EmptyCoroutineContext

    }



/**

tracinglib/core/host/src-fake/Compile.fake.kt

0 → 100644
+22 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2024 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



package com.android.systemui.util



@Suppress("UNUSED_PARAMETER")

object Compile {

    const val IS_DEBUG = true

}