1 /*
2  * Copyright (C) 2017 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 libcore.heapdumper;
18 
19 import android.app.Activity;
20 import android.os.Bundle;
21 import android.os.Debug;
22 import android.util.Log;
23 
24 import java.io.File;
25 import java.io.IOException;
26 
27 /**
28  * A specialization of {@link AbstractMetricInstrumentation} where the measurement is taken by
29  * dumping the process's heaps.
30  */
31 public class HeapDumpInstrumentation extends AbstractMetricInstrumentation {
32 
33     private static final String TAG = "HeapDumpInstrumentation";
34 
35     @Override
takeMeasurement(String label)36     protected void takeMeasurement(String label) throws IOException {
37         File dumpFile = resolveRelativeOutputFilename(label + ".hprof");
38         tryRemoveGarbage();
39         Debug.dumpHprofData(dumpFile.getCanonicalPath());
40         Log.i(TAG, "Wrote to heap dump to " + dumpFile.getCanonicalPath());
41     }
42 }
43