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      1 /*
      2  * Copyright (C) 2018 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.server;
     18 
     19 import android.os.Binder;
     20 import android.os.ServiceManager;
     21 import android.os.SystemProperties;
     22 import android.util.Slog;
     23 
     24 import com.android.internal.os.BinderCallsStats;
     25 
     26 import java.io.FileDescriptor;
     27 import java.io.PrintWriter;
     28 
     29 public class BinderCallsStatsService extends Binder {
     30 
     31     private static final String TAG = "BinderCallsStatsService";
     32 
     33     private static final String PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING
     34             = "persist.sys.binder_calls_detailed_tracking";
     35 
     36     public static void start() {
     37         BinderCallsStatsService service = new BinderCallsStatsService();
     38         ServiceManager.addService("binder_calls_stats", service);
     39         boolean detailedTrackingEnabled = SystemProperties.getBoolean(
     40                 PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING, false);
     41 
     42         if (detailedTrackingEnabled) {
     43             Slog.i(TAG, "Enabled CPU usage tracking for binder calls. Controlled by "
     44                     + PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING
     45                     + " or via dumpsys binder_calls_stats --enable-detailed-tracking");
     46             BinderCallsStats.getInstance().setDetailedTracking(true);
     47         }
     48     }
     49 
     50     public static void reset() {
     51         Slog.i(TAG, "Resetting stats");
     52         BinderCallsStats.getInstance().reset();
     53     }
     54 
     55     @Override
     56     protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
     57         if (args != null) {
     58             for (final String arg : args) {
     59                 if ("-a".equals(arg)) {
     60                     // We currently dump all information by default
     61                     continue;
     62                 } else if ("--reset".equals(arg)) {
     63                     reset();
     64                     pw.println("binder_calls_stats reset.");
     65                     return;
     66                 } else if ("--enable-detailed-tracking".equals(arg)) {
     67                     SystemProperties.set(PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING, "1");
     68                     BinderCallsStats.getInstance().setDetailedTracking(true);
     69                     pw.println("Detailed tracking enabled");
     70                     return;
     71                 } else if ("--disable-detailed-tracking".equals(arg)) {
     72                     SystemProperties.set(PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING, "");
     73                     BinderCallsStats.getInstance().setDetailedTracking(false);
     74                     pw.println("Detailed tracking disabled");
     75                     return;
     76                 } else if ("-h".equals(arg)) {
     77                     pw.println("binder_calls_stats commands:");
     78                     pw.println("  --reset: Reset stats");
     79                     pw.println("  --enable-detailed-tracking: Enables detailed tracking");
     80                     pw.println("  --disable-detailed-tracking: Disables detailed tracking");
     81                     return;
     82                 } else {
     83                     pw.println("Unknown option: " + arg);
     84                 }
     85             }
     86         }
     87         BinderCallsStats.getInstance().dump(pw);
     88     }
     89 }
     90