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/*
* 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 android.os;
import android.util.Log;
import android.util.Size;
import com.android.internal.util.FastPrintWriter;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;
/**
* Class used to track binder transactions. It indexes the transactions by the stack trace.
*
* @hide
*/
public class TransactionTracker {
private Map<String, Long> mTraces;
private void resetTraces() {
synchronized (this) {
mTraces = new HashMap<String, Long>();
}
}
TransactionTracker() {
resetTraces();
}
public void addTrace(Throwable tr) {
String trace = Log.getStackTraceString(tr);
synchronized (this) {
if (mTraces.containsKey(trace)) {
mTraces.put(trace, mTraces.get(trace) + 1);
} else {
mTraces.put(trace, Long.valueOf(1));
}
}
}
public void writeTracesToFile(ParcelFileDescriptor fd) {
if (mTraces.isEmpty()) {
return;
}
PrintWriter pw = new FastPrintWriter(new FileOutputStream(fd.getFileDescriptor()));
synchronized (this) {
for (String trace : mTraces.keySet()) {
pw.println("Count: " + mTraces.get(trace));
pw.println("Trace: " + trace);
pw.println();
}
}
pw.flush();
}
public void clearTraces(){
resetTraces();
}
}
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