| /* |
| * Copyright (C) 2020 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.perftests.blob; |
| |
| import android.app.Instrumentation; |
| import android.app.UiAutomation; |
| import android.os.ParcelFileDescriptor; |
| import android.perftests.utils.TraceMarkParser; |
| import android.perftests.utils.TraceMarkParser.TraceMarkSlice; |
| import android.support.test.uiautomator.UiDevice; |
| import android.util.Log; |
| |
| import androidx.test.platform.app.InstrumentationRegistry; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.util.List; |
| import java.util.function.BiConsumer; |
| |
| // Copy of com.android.frameworks.perftests.am.util.AtraceUtils. TODO: avoid this duplication. |
| public class AtraceUtils { |
| private static final String TAG = "AtraceUtils"; |
| private static final boolean VERBOSE = true; |
| |
| private static final String ATRACE_START = "atrace --async_start -b %d -c %s"; |
| private static final String ATRACE_DUMP = "atrace --async_dump"; |
| private static final String ATRACE_STOP = "atrace --async_stop"; |
| private static final int DEFAULT_ATRACE_BUF_SIZE = 1024; |
| |
| private UiAutomation mAutomation; |
| private static AtraceUtils sUtils = null; |
| private boolean mStarted = false; |
| |
| private AtraceUtils(Instrumentation instrumentation) { |
| mAutomation = instrumentation.getUiAutomation(); |
| } |
| |
| public static AtraceUtils getInstance(Instrumentation instrumentation) { |
| if (sUtils == null) { |
| sUtils = new AtraceUtils(instrumentation); |
| } |
| return sUtils; |
| } |
| |
| /** |
| * @param categories The list of the categories to trace, separated with space. |
| */ |
| public void startTrace(String categories) { |
| synchronized (this) { |
| if (mStarted) { |
| throw new IllegalStateException("atrace already started"); |
| } |
| runShellCommand(String.format( |
| ATRACE_START, DEFAULT_ATRACE_BUF_SIZE, categories)); |
| mStarted = true; |
| } |
| } |
| |
| public void stopTrace() { |
| synchronized (this) { |
| mStarted = false; |
| runShellCommand(ATRACE_STOP); |
| } |
| } |
| |
| private String runShellCommand(String cmd) { |
| try { |
| return UiDevice.getInstance( |
| InstrumentationRegistry.getInstrumentation()).executeShellCommand(cmd); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** |
| * @param parser The function that can accept the buffer of atrace dump and parse it. |
| * @param handler The parse result handler |
| */ |
| public void performDump(TraceMarkParser parser, |
| BiConsumer<String, List<TraceMarkSlice>> handler) { |
| parser.reset(); |
| try { |
| if (VERBOSE) { |
| Log.i(TAG, "Collecting atrace dump..."); |
| } |
| writeDataToBuf(mAutomation.executeShellCommand(ATRACE_DUMP), parser); |
| } catch (IOException e) { |
| Log.e(TAG, "Error in reading dump", e); |
| } |
| parser.forAllSlices(handler); |
| } |
| |
| // The given file descriptor here will be closed by this function |
| private void writeDataToBuf(ParcelFileDescriptor pfDescriptor, |
| TraceMarkParser parser) throws IOException { |
| InputStream inputStream = new ParcelFileDescriptor.AutoCloseInputStream(pfDescriptor); |
| try (BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) { |
| String line; |
| while ((line = reader.readLine()) != null) { |
| parser.visit(line); |
| } |
| } |
| } |
| } |