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      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.CollectingOutputReceiver;
     20 import com.android.ddmlib.IDevice;
     21 
     22 import org.eclipse.core.runtime.IProgressMonitor;
     23 import org.eclipse.jface.operation.IRunnableWithProgress;
     24 
     25 import java.lang.reflect.InvocationTargetException;
     26 import java.util.ArrayList;
     27 import java.util.List;
     28 import java.util.concurrent.CountDownLatch;
     29 import java.util.concurrent.TimeUnit;
     30 import java.util.regex.Matcher;
     31 import java.util.regex.Pattern;
     32 
     33 public class SystraceVersionDetector implements IRunnableWithProgress {
     34     public static final int SYSTRACE_V1 = 1;
     35     public static final int SYSTRACE_V2 = 2;
     36 
     37     private final IDevice mDevice;
     38     private List<SystraceTag> mTags;
     39 
     40     public SystraceVersionDetector(IDevice device) {
     41         mDevice = device;
     42     }
     43 
     44     @Override
     45     public void run(IProgressMonitor monitor) throws InvocationTargetException,
     46             InterruptedException {
     47         monitor.beginTask("Checking systrace version on device..",
     48                 IProgressMonitor.UNKNOWN);
     49 
     50         CountDownLatch setTagLatch = new CountDownLatch(1);
     51         CollectingOutputReceiver receiver = new CollectingOutputReceiver(setTagLatch);
     52         try {
     53             String cmd = "atrace --list_categories";
     54             mDevice.executeShellCommand(cmd, receiver);
     55             setTagLatch.await(5, TimeUnit.SECONDS);
     56         } catch (Exception e) {
     57             throw new InvocationTargetException(e);
     58         }
     59 
     60         String shellOutput = receiver.getOutput();
     61         mTags = parseSupportedTags(shellOutput);
     62 
     63         monitor.done();
     64     }
     65 
     66     public int getVersion() {
     67         if (mTags == null) {
     68             return SYSTRACE_V1;
     69         } else {
     70             return SYSTRACE_V2;
     71         }
     72     }
     73 
     74     public List<SystraceTag> getTags() {
     75         return mTags;
     76     }
     77 
     78     private List<SystraceTag> parseSupportedTags(String listCategoriesOutput) {
     79         if (listCategoriesOutput == null) {
     80             return null;
     81         }
     82 
     83         if (listCategoriesOutput.contains("unknown option")) {
     84             return null;
     85         }
     86 
     87         String[] categories = listCategoriesOutput.split("\n");
     88         List<SystraceTag> tags = new ArrayList<SystraceTag>(categories.length);
     89 
     90         Pattern p = Pattern.compile("([^-]+) - (.*)"); //$NON-NLS-1$
     91         for (String category : categories) {
     92             Matcher m = p.matcher(category);
     93             if (m.find()) {
     94                 tags.add(new SystraceTag(m.group(1).trim(), m.group(2).trim()));
     95             }
     96         }
     97 
     98         return tags;
     99     }
    100 }
    101