blob: c7d0b3f57352f5d11c4526acc824f6835d8cf383 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/*
* Copyright (C) 2017 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 com.android.dialer.strictmode;
import android.app.Application;
import android.content.Context;
import android.os.Handler;
import android.os.Looper;
import android.os.StrictMode;
import android.os.StrictMode.ThreadPolicy;
import android.os.StrictMode.VmPolicy;
import android.preference.PreferenceManager;
import android.support.annotation.AnyThread;
import android.support.annotation.MainThread;
import android.support.v4.os.UserManagerCompat;
import com.android.dialer.buildtype.BuildType;
import com.android.dialer.function.Supplier;
import com.android.dialer.util.DialerUtils;
/** Enables strict mode for the application, and provides means of temporarily disabling it. */
public final class DialerStrictMode {
private static final VmPolicy VM_DEATH_PENALTY =
new StrictMode.VmPolicy.Builder().penaltyLog().penaltyDeath().build();
private static final ThreadPolicy THREAD_LOG_PENALTY =
new StrictMode.ThreadPolicy.Builder().penaltyLog().build();
private static final ThreadPolicy THREAD_DEATH_PENALTY =
new StrictMode.ThreadPolicy.Builder().penaltyLog().penaltyDeath().build();
private DialerStrictMode() {}
/** Initializes strict mode on application start. */
@MainThread
public static void onApplicationCreate(Application application) {
if (isStrictModeAllowed()) {
warmupSharedPrefs(application);
StrictModeUtils.setRecommendedMainThreadPolicy(THREAD_DEATH_PENALTY);
StrictModeUtils.setRecommendedVMPolicy(VM_DEATH_PENALTY);
// Because Android resets StrictMode policies after Application.onCreate is done, we set it
// again right after.
// See cl/105932355 for the discussion.
// See b/36951662 for the public bug.
Handler handler = new Handler(Looper.myLooper());
handler.postAtFrontOfQueue(
() -> StrictModeUtils.setRecommendedMainThreadPolicy(THREAD_DEATH_PENALTY));
}
}
/**
* We frequently access shared preferences on the main thread, which causes strict mode
* violations. When strict mode is allowed, warm up the shared preferences so that later uses of
* shared preferences access the in-memory versions and we don't have to bypass strict mode at
* every point in the application where shared preferences are accessed.
*/
private static void warmupSharedPrefs(Application application) {
// From credential-encrypted (CE) storage, i.e.:
// /data/data/com.android.dialer/shared_prefs
if (UserManagerCompat.isUserUnlocked(application)) {
// <package_name>_preferences.xml
PreferenceManager.getDefaultSharedPreferences(application);
// <package_name>.xml
application.getSharedPreferences(application.getPackageName(), Context.MODE_PRIVATE);
}
// From device-encrypted (DE) storage, i.e.:
// /data/user_de/0/com.android.dialer/shared_prefs/
// <package_name>_preferences.xml
DialerUtils.getDefaultSharedPreferenceForDeviceProtectedStorageContext(application);
}
private static boolean isStrictModeAllowed() {
return BuildType.get() == BuildType.BUGFOOD;
}
private static boolean onMainThread() {
return Looper.getMainLooper().equals(Looper.myLooper());
}
/**
* Convenience method for disabling and enabling the thread policy death penalty using lambdas.
*
* <p>For example:
*
* <p><code>
* Value foo = DialerStrictMode.bypass(() -> doDiskAccessOnMainThreadReturningValue());
* </code>
*
* <p>The thread policy is only mutated if this is called from the main thread.
*/
@AnyThread
public static <T> T bypass(Supplier<T> supplier) {
if (isStrictModeAllowed() && onMainThread()) {
ThreadPolicy originalPolicy = StrictMode.getThreadPolicy();
StrictModeUtils.setRecommendedMainThreadPolicy(THREAD_LOG_PENALTY);
try {
return supplier.get();
} finally {
StrictMode.setThreadPolicy(originalPolicy);
}
}
return supplier.get();
}
/**
* Convenience method for disabling and enabling the thread policy death penalty using lambdas.
*
* <p>For example:
*
* <p><code>
* DialerStrictMode.bypass(() -> doDiskAccessOnMainThread());
* </code>
*
* <p>The thread policy is only mutated if this is called from the main thread.
*/
@AnyThread
public static void bypass(Runnable runnable) {
if (isStrictModeAllowed() && onMainThread()) {
ThreadPolicy originalPolicy = StrictMode.getThreadPolicy();
StrictModeUtils.setRecommendedMainThreadPolicy(THREAD_LOG_PENALTY);
try {
runnable.run();
} finally {
StrictMode.setThreadPolicy(originalPolicy);
}
}
runnable.run();
}
}
|