| /* |
| * Copyright (C) 2015 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.traceur; |
| |
| import android.sysprop.TraceProperties; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.util.Collection; |
| import java.util.List; |
| |
| import com.android.traceur.TraceUtils.Streamer; |
| |
| /** |
| * Utility functions for calling atrace |
| */ |
| public class AtraceUtils implements TraceUtils.TraceEngine { |
| |
| static final String TAG = "Traceur"; |
| |
| private static final String DEBUG_TRACING_FILE = "/sys/kernel/debug/tracing/tracing_on"; |
| private static final String TRACING_FILE = "/sys/kernel/tracing/tracing_on"; |
| |
| public static String NAME = "ATRACE"; |
| private static String OUTPUT_EXTENSION = "ctrace"; |
| |
| public String getName() { |
| return NAME; |
| } |
| |
| public String getOutputExtension() { |
| return OUTPUT_EXTENSION; |
| } |
| |
| /* Note: attachToBugreport, longTrace, maxLongTrace* parameters are ignored in atrace mode. */ |
| public boolean traceStart(Collection<String> tags, int bufferSizeKb, boolean apps, |
| boolean attachToBugreport, boolean longTrace, int maxLongTraceSizeMb, |
| int maxLongTraceDurationMinutes) { |
| String appParameter = apps ? "-a '*' " : ""; |
| String cmd = "atrace --async_start -c -b " + bufferSizeKb + " " |
| + appParameter + TextUtils.join(" ", tags); |
| |
| Log.v(TAG, "Starting async atrace: " + cmd); |
| try { |
| Process atrace = TraceUtils.exec(cmd); |
| if (atrace.waitFor() != 0) { |
| Log.e(TAG, "atraceStart failed with: " + atrace.exitValue()); |
| return false; |
| } |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| return true; |
| } |
| |
| public void traceStop() { |
| String cmd = "atrace --async_stop > /dev/null"; |
| |
| Log.v(TAG, "Stopping async atrace: " + cmd); |
| try { |
| Process atrace = TraceUtils.exec(cmd); |
| |
| if (atrace.waitFor() != 0) { |
| Log.e(TAG, "atraceStop failed with: " + atrace.exitValue()); |
| } |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| public boolean traceDump(File outFile) { |
| String cmd = "atrace --async_stop -z -c -o " + outFile; |
| |
| Log.v(TAG, "Dumping async atrace: " + cmd); |
| try { |
| Process atrace = TraceUtils.exec(cmd); |
| |
| if (atrace.waitFor() != 0) { |
| Log.e(TAG, "atraceDump failed with: " + atrace.exitValue()); |
| return false; |
| } |
| |
| Process ps = TraceUtils.exec("ps -AT", null, false); |
| |
| new Streamer("atraceDump:ps:stdout", |
| ps.getInputStream(), new FileOutputStream(outFile, true /* append */)); |
| |
| if (ps.waitFor() != 0) { |
| Log.e(TAG, "atraceDump:ps failed with: " + ps.exitValue()); |
| return false; |
| } |
| |
| // Set the new file world readable to allow it to be adb pulled. |
| outFile.setReadable(true, false); // (readable, ownerOnly) |
| outFile.setWritable(true, false); // (readable, ownerOnly) |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| return true; |
| } |
| |
| public boolean isTracingOn() { |
| boolean userInitiatedTracingFlag = |
| TraceProperties.user_initiated().orElse(false); |
| |
| if (!userInitiatedTracingFlag) { |
| return false; |
| } |
| |
| boolean tracingOnFlag = false; |
| |
| try { |
| List<String> tracingOnContents; |
| |
| Path debugTracingOnPath = Paths.get(DEBUG_TRACING_FILE); |
| Path tracingOnPath = Paths.get(TRACING_FILE); |
| |
| if (Files.isReadable(debugTracingOnPath)) { |
| tracingOnContents = Files.readAllLines(debugTracingOnPath); |
| } else if (Files.isReadable(tracingOnPath)) { |
| tracingOnContents = Files.readAllLines(tracingOnPath); |
| } else { |
| return false; |
| } |
| |
| tracingOnFlag = !tracingOnContents.get(0).equals("0"); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| |
| return userInitiatedTracingFlag && tracingOnFlag; |
| } |
| } |