| /* |
| * 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(); |
| } |
| } |