1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.ide.eclipse.ddms.systrace; 18 19 import com.android.ddmlib.IDevice; 20 import com.android.ddmlib.IShellOutputReceiver; 21 import com.google.common.primitives.Bytes; 22 23 public class SystraceTask implements Runnable { 24 private final IDevice mDevice; 25 private final String mOptions; 26 27 private volatile boolean mCancel; 28 29 private final Object mLock = new Object(); 30 private String errorMessage; 31 private boolean mTraceComplete; 32 private byte[] mBuffer = new byte[1024]; 33 private int mDataLength = 0; 34 SystraceTask(IDevice device, String options)35 public SystraceTask(IDevice device, String options) { 36 mDevice = device; 37 mOptions = options; 38 } 39 40 @Override run()41 public void run() { 42 try { 43 mDevice.executeShellCommand("atrace " + mOptions, new Receiver(), 0); 44 } catch (Exception e) { 45 synchronized (mLock) { 46 errorMessage = "Unexpected error while running atrace on device: " + e; 47 } 48 } 49 } 50 cancel()51 public void cancel() { 52 mCancel = true; 53 } 54 getError()55 public String getError() { 56 synchronized (mLock) { 57 return errorMessage; 58 } 59 } 60 getAtraceOutput()61 public byte[] getAtraceOutput() { 62 synchronized (mLock) { 63 return mTraceComplete ? mBuffer : null; 64 } 65 } 66 67 private class Receiver implements IShellOutputReceiver { 68 @Override addOutput(byte[] data, int offset, int length)69 public void addOutput(byte[] data, int offset, int length) { 70 synchronized (mLock) { 71 if (mDataLength + length > mBuffer.length) { 72 mBuffer = Bytes.ensureCapacity(mBuffer, mDataLength + length + 1, 1024); 73 } 74 75 for (int i = 0; i < length; i++) { 76 mBuffer[mDataLength + i] = data[offset + i]; 77 } 78 mDataLength += length; 79 } 80 } 81 82 @Override flush()83 public void flush() { 84 synchronized (mLock) { 85 // trim mBuffer to its final size 86 byte[] copy = new byte[mDataLength]; 87 for (int i = 0; i < mDataLength; i++) { 88 copy[i] = mBuffer[i]; 89 } 90 mBuffer = copy; 91 92 mTraceComplete = true; 93 } 94 } 95 96 @Override isCancelled()97 public boolean isCancelled() { 98 return mCancel; 99 } 100 } 101 } 102