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
17package com.android.server;
18
19import android.os.Binder;
20import android.os.ServiceManager;
21import android.os.SystemProperties;
22import android.util.Slog;
23
24import com.android.internal.os.BinderCallsStats;
25
26import java.io.FileDescriptor;
27import java.io.PrintWriter;
28
29public 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