81 lines
2.4 KiB
Java
81 lines
2.4 KiB
Java
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.util;
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import android.os.Trace;
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import androidx.annotation.MainThread;
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import java.util.function.Supplier;
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/**
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* A wrapper around {@link Trace} to allow better testing.
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*
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* To enable any tracing log, execute the following command:
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* $ adb shell setprop log.tag.LAUNCHER_TRACE VERBOSE
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* $ adb shell setprop log.tag.TAGNAME VERBOSE
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*/
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public class TraceHelper {
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// Track binder class for this trace
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public static final int FLAG_ALLOW_BINDER_TRACKING = 1 << 0;
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// Temporarily ignore blocking binder calls for this trace.
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public static final int FLAG_IGNORE_BINDERS = 1 << 1;
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public static final int FLAG_CHECK_FOR_RACE_CONDITIONS = 1 << 2;
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public static final int FLAG_UI_EVENT =
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FLAG_ALLOW_BINDER_TRACKING | FLAG_CHECK_FOR_RACE_CONDITIONS;
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/**
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* Static instance of Trace helper, overridden in tests.
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*/
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public static TraceHelper INSTANCE = new TraceHelper();
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public void beginSection(String sectionName) {
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beginSection(sectionName, 0);
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}
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public void beginSection(String sectionName, int flags) {
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Trace.beginSection(sectionName);
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}
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public void endSection() {
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Trace.endSection();
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}
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/**
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* Similar to {@link #beginSection} but doesn't add a trace section.
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*/
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public void beginFlagsOverride(int flags) { }
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public void endFlagsOverride() { }
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/**
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* Temporarily ignore blocking binder calls for the duration of this {@link Supplier}.
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*/
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@MainThread
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public static <T> T whitelistIpcs(String rpcName, Supplier<T> supplier) {
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INSTANCE.beginSection(rpcName, FLAG_IGNORE_BINDERS);
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try {
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return supplier.get();
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} finally {
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INSTANCE.endSection();
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}
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}
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}
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