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/*
* Copyright (C) 2018 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 android.gameperformance;
import java.io.BufferedReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import android.app.Instrumentation;
import android.os.AsyncTask;
import android.os.ParcelFileDescriptor;
import android.util.Log;
/**
* Helper that runs atrace command for required duration and category. Results are read from
* the output of atrace and serialized to the provided file. We cannot use direct atrace to
* file because atrace is executed in UI automator context and analysis is done in test context.
* In last case output file is not accessible from the both contexts.
*/
public class ATraceRunner extends AsyncTask<Void, Integer, Boolean>{
private final static String TAG = "ATraceRunner";
// Report that atrace is done.
public interface Delegate {
public void onProcessed(boolean success);
}
private final Instrumentation mInstrumentation;
private final String mOutput;
private final int mTimeInSeconds;
private final String mCategory;
private final Delegate mDelegate;
public ATraceRunner(Instrumentation instrumentation,
String output,
int timeInSeconds,
String category,
Delegate delegate) {
mInstrumentation = instrumentation;
mOutput = output;
mTimeInSeconds = timeInSeconds;
mCategory = category;
mDelegate = delegate;
}
@Override
protected Boolean doInBackground(Void... params) {
BufferedReader bufferedReader = null;
FileWriter writer = null;
try {
// Run the command.
final String cmd = "atrace -t " + mTimeInSeconds + " " + mCategory;
Log.i(TAG, "Running atrace... " + cmd);
writer = new FileWriter(mOutput);
final ParcelFileDescriptor fd =
mInstrumentation.getUiAutomation().executeShellCommand(cmd);
bufferedReader = new BufferedReader(
new InputStreamReader(new ParcelFileDescriptor.AutoCloseInputStream(fd)));
String line;
while ((line = bufferedReader.readLine()) != null) {
writer.write(line);
writer.write("\n");
}
Log.i(TAG, "Running atrace... DONE");
return true;
} catch (IOException e) {
Log.i(TAG, "atrace failed", e);
return false;
} finally {
Utils.closeQuietly(bufferedReader);
Utils.closeQuietly(writer);
}
}
@Override
protected void onPostExecute(Boolean result) {
mDelegate.onProcessed(result);
}
}
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