xref: /aosp_15_r20/frameworks/base/tools/preload/Policy.java (revision d57664e9bc4670b3ecf6748a746a57c557b6bc9e)
1*d57664e9SAndroid Build Coastguard Worker /*
2*d57664e9SAndroid Build Coastguard Worker  * Copyright (C) 2008 The Android Open Source Project
3*d57664e9SAndroid Build Coastguard Worker  *
4*d57664e9SAndroid Build Coastguard Worker  * Licensed under the Apache License, Version 2.0 (the "License");
5*d57664e9SAndroid Build Coastguard Worker  * you may not use this file except in compliance with the License.
6*d57664e9SAndroid Build Coastguard Worker  * You may obtain a copy of the License at
7*d57664e9SAndroid Build Coastguard Worker  *
8*d57664e9SAndroid Build Coastguard Worker  *      http://www.apache.org/licenses/LICENSE-2.0
9*d57664e9SAndroid Build Coastguard Worker  *
10*d57664e9SAndroid Build Coastguard Worker  * Unless required by applicable law or agreed to in writing, software
11*d57664e9SAndroid Build Coastguard Worker  * distributed under the License is distributed on an "AS IS" BASIS,
12*d57664e9SAndroid Build Coastguard Worker  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13*d57664e9SAndroid Build Coastguard Worker  * See the License for the specific language governing permissions and
14*d57664e9SAndroid Build Coastguard Worker  * limitations under the License.
15*d57664e9SAndroid Build Coastguard Worker  */
16*d57664e9SAndroid Build Coastguard Worker 
17*d57664e9SAndroid Build Coastguard Worker import java.util.Arrays;
18*d57664e9SAndroid Build Coastguard Worker import java.util.HashSet;
19*d57664e9SAndroid Build Coastguard Worker import java.util.Set;
20*d57664e9SAndroid Build Coastguard Worker 
21*d57664e9SAndroid Build Coastguard Worker /**
22*d57664e9SAndroid Build Coastguard Worker  * Policy that governs which classes are preloaded.
23*d57664e9SAndroid Build Coastguard Worker  */
24*d57664e9SAndroid Build Coastguard Worker public class Policy {
25*d57664e9SAndroid Build Coastguard Worker 
26*d57664e9SAndroid Build Coastguard Worker     /**
27*d57664e9SAndroid Build Coastguard Worker      * No constructor - use static methods only
28*d57664e9SAndroid Build Coastguard Worker      */
Policy()29*d57664e9SAndroid Build Coastguard Worker     private Policy() {}
30*d57664e9SAndroid Build Coastguard Worker 
31*d57664e9SAndroid Build Coastguard Worker     /**
32*d57664e9SAndroid Build Coastguard Worker      * This location (in the build system) of the preloaded-classes file.
33*d57664e9SAndroid Build Coastguard Worker      */
34*d57664e9SAndroid Build Coastguard Worker     static final String PRELOADED_CLASS_FILE
35*d57664e9SAndroid Build Coastguard Worker             = "frameworks/base/preloaded-classes";
36*d57664e9SAndroid Build Coastguard Worker 
37*d57664e9SAndroid Build Coastguard Worker     /**
38*d57664e9SAndroid Build Coastguard Worker      * Long running services. These are restricted in their contribution to the
39*d57664e9SAndroid Build Coastguard Worker      * preloader because their launch time is less critical.
40*d57664e9SAndroid Build Coastguard Worker      */
41*d57664e9SAndroid Build Coastguard Worker     // TODO: Generate this automatically from package manager.
42*d57664e9SAndroid Build Coastguard Worker     private static final Set<String> SERVICES = new HashSet<String>(Arrays.asList(
43*d57664e9SAndroid Build Coastguard Worker         "system_server",
44*d57664e9SAndroid Build Coastguard Worker         "com.google.process.content",
45*d57664e9SAndroid Build Coastguard Worker         "android.process.media",
46*d57664e9SAndroid Build Coastguard Worker         "com.android.bluetooth",
47*d57664e9SAndroid Build Coastguard Worker         "com.android.calendar",
48*d57664e9SAndroid Build Coastguard Worker         "com.android.inputmethod.latin",
49*d57664e9SAndroid Build Coastguard Worker         "com.android.phone",
50*d57664e9SAndroid Build Coastguard Worker         "com.google.android.apps.maps.FriendService", // pre froyo
51*d57664e9SAndroid Build Coastguard Worker         "com.google.android.apps.maps:FriendService", // froyo
52*d57664e9SAndroid Build Coastguard Worker         "com.google.android.apps.maps.LocationFriendService",
53*d57664e9SAndroid Build Coastguard Worker         "com.google.android.deskclock",
54*d57664e9SAndroid Build Coastguard Worker         "com.google.process.gapps",
55*d57664e9SAndroid Build Coastguard Worker         "android.tts"
56*d57664e9SAndroid Build Coastguard Worker     ));
57*d57664e9SAndroid Build Coastguard Worker 
58*d57664e9SAndroid Build Coastguard Worker     /**
59*d57664e9SAndroid Build Coastguard Worker      * Classes which we shouldn't load from the Zygote.
60*d57664e9SAndroid Build Coastguard Worker      */
61*d57664e9SAndroid Build Coastguard Worker     private static final Set<String> EXCLUDED_CLASSES
62*d57664e9SAndroid Build Coastguard Worker             = new HashSet<String>(Arrays.asList(
63*d57664e9SAndroid Build Coastguard Worker         // Binders
64*d57664e9SAndroid Build Coastguard Worker         "android.app.AlarmManager",
65*d57664e9SAndroid Build Coastguard Worker         "android.app.SearchManager",
66*d57664e9SAndroid Build Coastguard Worker         "android.os.FileObserver",
67*d57664e9SAndroid Build Coastguard Worker         "com.android.server.PackageManagerService$AppDirObserver",
68*d57664e9SAndroid Build Coastguard Worker 
69*d57664e9SAndroid Build Coastguard Worker         // Threads
70*d57664e9SAndroid Build Coastguard Worker         "android.os.AsyncTask",
71*d57664e9SAndroid Build Coastguard Worker         "android.pim.ContactsAsyncHelper",
72*d57664e9SAndroid Build Coastguard Worker         "android.webkit.WebViewClassic$1",
73*d57664e9SAndroid Build Coastguard Worker         "java.lang.ProcessManager"
74*d57664e9SAndroid Build Coastguard Worker     ));
75*d57664e9SAndroid Build Coastguard Worker 
76*d57664e9SAndroid Build Coastguard Worker     /**
77*d57664e9SAndroid Build Coastguard Worker      * Returns true if the given process name is a "long running" process or
78*d57664e9SAndroid Build Coastguard Worker      * service.
79*d57664e9SAndroid Build Coastguard Worker      */
isService(String processName)80*d57664e9SAndroid Build Coastguard Worker     public static boolean isService(String processName) {
81*d57664e9SAndroid Build Coastguard Worker         return SERVICES.contains(processName);
82*d57664e9SAndroid Build Coastguard Worker     }
83*d57664e9SAndroid Build Coastguard Worker 
84*d57664e9SAndroid Build Coastguard Worker     /** Reports if the given class should be preloaded. */
isPreloadable(LoadedClass clazz)85*d57664e9SAndroid Build Coastguard Worker     public static boolean isPreloadable(LoadedClass clazz) {
86*d57664e9SAndroid Build Coastguard Worker         return clazz.systemClass && !EXCLUDED_CLASSES.contains(clazz.name)
87*d57664e9SAndroid Build Coastguard Worker                 && !clazz.name.endsWith("$NoPreloadHolder");
88*d57664e9SAndroid Build Coastguard Worker     }
89*d57664e9SAndroid Build Coastguard Worker }
90