1 /* 2 * Copyright (C) 2016 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.systemui.classifier; 18 19 import android.app.ActivityThread; 20 import android.app.Application; 21 import android.os.Build; 22 import android.os.SystemProperties; 23 import android.util.Log; 24 25 import java.io.File; 26 import java.io.IOException; 27 import java.io.PrintWriter; 28 import java.text.SimpleDateFormat; 29 import java.util.ArrayDeque; 30 import java.util.Date; 31 import java.util.Locale; 32 33 /** 34 * Keeps track of interesting falsing data. 35 * 36 * By default the log only gets collected on userdebug builds. To turn it on on user: 37 * adb shell setprop debug.falsing_log true 38 * 39 * The log gets dumped as part of the SystemUI services. To dump on demand: 40 * adb shell dumpsys activity service com.android.systemui StatusBar | grep -A 999 FALSING | less 41 * 42 * To dump into logcat: 43 * adb shell setprop debug.falsing_logcat true 44 * 45 * To adjust the log buffer size: 46 * adb shell setprop debug.falsing_log_size 200 47 */ 48 public class FalsingLog { 49 public static final boolean ENABLED = SystemProperties.getBoolean("debug.falsing_log", 50 Build.IS_DEBUGGABLE); 51 private static final boolean LOGCAT = SystemProperties.getBoolean("debug.falsing_logcat", 52 false); 53 54 public static final boolean VERBOSE = false; 55 56 private static final int MAX_SIZE = SystemProperties.getInt("debug.falsing_log_size", 100); 57 58 private static final String TAG = "FalsingLog"; 59 60 private final ArrayDeque<String> mLog = new ArrayDeque<>(MAX_SIZE); 61 private final SimpleDateFormat mFormat = new SimpleDateFormat("MM-dd HH:mm:ss", Locale.US); 62 63 private static FalsingLog sInstance; 64 FalsingLog()65 private FalsingLog() { 66 } 67 v(String tag, String s)68 public static void v(String tag, String s) { 69 if (!VERBOSE) { 70 return; 71 } 72 if (LOGCAT) { 73 Log.v(TAG, tag + "\t" + s); 74 } 75 log("V", tag, s); 76 } 77 i(String tag, String s)78 public static void i(String tag, String s) { 79 if (LOGCAT) { 80 Log.i(TAG, tag + "\t" + s); 81 } 82 log("I", tag, s); 83 } 84 wLogcat(String tag, String s)85 public static void wLogcat(String tag, String s) { 86 Log.w(TAG, tag + "\t" + s); 87 log("W", tag, s); 88 } 89 w(String tag, String s)90 public static void w(String tag, String s) { 91 if (LOGCAT) { 92 Log.w(TAG, tag + "\t" + s); 93 } 94 log("W", tag, s); 95 } 96 e(String tag, String s)97 public static void e(String tag, String s) { 98 if (LOGCAT) { 99 Log.e(TAG, tag + "\t" + s); 100 } 101 log("E", tag, s); 102 } 103 log(String level, String tag, String s)104 public static synchronized void log(String level, String tag, String s) { 105 if (!ENABLED) { 106 return; 107 } 108 if (sInstance == null) { 109 sInstance = new FalsingLog(); 110 } 111 112 if (sInstance.mLog.size() >= MAX_SIZE) { 113 sInstance.mLog.removeFirst(); 114 } 115 String entry = new StringBuilder().append(sInstance.mFormat.format(new Date())) 116 .append(" ").append(level).append(" ") 117 .append(tag).append(" ").append(s).toString(); 118 sInstance.mLog.add(entry); 119 } 120 dump(PrintWriter pw)121 public static synchronized void dump(PrintWriter pw) { 122 pw.println("FALSING LOG:"); 123 if (!ENABLED) { 124 pw.println("Disabled, to enable: setprop debug.falsing_log 1"); 125 pw.println(); 126 return; 127 } 128 if (sInstance == null || sInstance.mLog.isEmpty()) { 129 pw.println("<empty>"); 130 pw.println(); 131 return; 132 } 133 for (String s : sInstance.mLog) { 134 pw.println(s); 135 } 136 pw.println(); 137 } 138 wtf(String tag, String s, Throwable here)139 public static synchronized void wtf(String tag, String s, Throwable here) { 140 if (!ENABLED) { 141 return; 142 } 143 e(tag, s); 144 145 Application application = ActivityThread.currentApplication(); 146 String fileMessage = ""; 147 if (Build.IS_DEBUGGABLE && application != null) { 148 File f = new File(application.getDataDir(), "falsing-" 149 + new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date()) + ".txt"); 150 PrintWriter pw = null; 151 try { 152 pw = new PrintWriter(f); 153 dump(pw); 154 pw.close(); 155 fileMessage = "Log written to " + f.getAbsolutePath(); 156 } catch (IOException e) { 157 Log.e(TAG, "Unable to write falsing log", e); 158 } finally { 159 if (pw != null) { 160 pw.close(); 161 } 162 } 163 } else { 164 Log.e(TAG, "Unable to write log, build must be debuggable."); 165 } 166 167 Log.wtf(TAG, tag + " " + s + "; " + fileMessage, here); 168 } 169 } 170