1 /*
2  * Copyright (C) 2017 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.dialer.strictmode.impl;
18 
19 import android.app.Application;
20 import android.os.Build;
21 import android.os.Build.VERSION_CODES;
22 import android.os.Handler;
23 import android.os.Looper;
24 import android.os.StrictMode;
25 import android.os.StrictMode.ThreadPolicy;
26 import android.os.StrictMode.VmPolicy;
27 import android.support.annotation.MainThread;
28 import android.support.annotation.Nullable;
29 import com.android.dialer.common.Assert;
30 import com.android.dialer.strictmode.DialerStrictMode;
31 import com.android.dialer.strictmode.StrictModeUtils;
32 import com.google.auto.value.AutoValue;
33 import java.util.Map;
34 import javax.inject.Inject;
35 
36 final class SystemDialerStrictMode implements DialerStrictMode {
37   private static final VmPolicy VM_DEATH_PENALTY =
38       new StrictMode.VmPolicy.Builder().penaltyLog().penaltyDeath().build();
39 
40   private static final ThreadPolicy THREAD_DEATH_PENALTY =
41       new StrictMode.ThreadPolicy.Builder().penaltyLog().penaltyDeath().build();
42 
43   @Inject
SystemDialerStrictMode()44   public SystemDialerStrictMode() {}
45 
46   @MainThread
47   @Override
onApplicationCreate(Application application)48   public void onApplicationCreate(Application application) {
49     if (StrictModeUtils.isStrictModeAllowed()) {
50       StrictModeUtils.warmupSharedPrefs(application);
51       setRecommendedMainThreadPolicy(THREAD_DEATH_PENALTY);
52       setRecommendedVMPolicy(VM_DEATH_PENALTY);
53 
54       // Because Android resets StrictMode policies after Application.onCreate is done, we set it
55       // again right after.
56       // See cl/105932355 for the discussion.
57       // See a bug for the public bug.
58       Handler handler = new Handler(Looper.myLooper());
59       handler.postAtFrontOfQueue(() -> setRecommendedMainThreadPolicy(THREAD_DEATH_PENALTY));
60     }
61   }
62 
63   /**
64    * Set the recommended policy for the app.
65    *
66    * @param threadPenalties policy with preferred penalties. Detection bits will be ignored.
67    */
setRecommendedMainThreadPolicy(StrictMode.ThreadPolicy threadPenalties)68   private static void setRecommendedMainThreadPolicy(StrictMode.ThreadPolicy threadPenalties) {
69     StrictMode.ThreadPolicy threadPolicy =
70         new StrictMode.ThreadPolicy.Builder(threadPenalties).detectAll().build();
71     StrictMode.setThreadPolicy(threadPolicy);
72   }
73 
74   /**
75    * Set the recommended policy for the app.
76    *
77    * @param vmPenalties policy with preferred penalties. Detection bits should be unset.
78    */
setRecommendedVMPolicy(StrictMode.VmPolicy vmPenalties)79   private static void setRecommendedVMPolicy(StrictMode.VmPolicy vmPenalties) {
80     setRecommendedVMPolicy(vmPenalties, StrictModeVmConfig.empty());
81   }
82 
83   /**
84    * Set the recommended policy for the app.
85    *
86    * @param vmPenalties policy with preferred penalties. Detection bits should be unset.
87    */
setRecommendedVMPolicy( StrictMode.VmPolicy vmPenalties, StrictModeVmConfig config)88   private static void setRecommendedVMPolicy(
89       StrictMode.VmPolicy vmPenalties, StrictModeVmConfig config) {
90     Assert.isNotNull(config);
91     StrictMode.VmPolicy.Builder vmPolicyBuilder =
92         new StrictMode.VmPolicy.Builder(vmPenalties)
93             .detectLeakedClosableObjects()
94             .detectLeakedSqlLiteObjects();
95     if (Build.VERSION.SDK_INT >= VERSION_CODES.O) {
96       vmPolicyBuilder.detectContentUriWithoutPermission();
97       // TODO(azlatin): Enable detecting untagged sockets once: a bug is fixed.
98       // vmPolicyBuilder.detectUntaggedSockets();
99     }
100     StrictMode.setVmPolicy(vmPolicyBuilder.build());
101   }
102 
103   /** VmPolicy configuration. */
104   @AutoValue
105   abstract static class StrictModeVmConfig {
106     /** A map of a class to the maximum number of allowed instances of that class. */
107     @Nullable
maxInstanceLimits()108     abstract Map<Class<?>, Integer> maxInstanceLimits();
109 
empty()110     public static StrictModeVmConfig empty() {
111       return builder().build();
112     }
113 
builder()114     public static Builder builder() {
115       return new AutoValue_SystemDialerStrictMode_StrictModeVmConfig.Builder();
116     }
117 
118     /** VmPolicy configuration builder. */
119     @AutoValue.Builder
120     public abstract static class Builder {
setMaxInstanceLimits(Map<Class<?>, Integer> limits)121       public abstract Builder setMaxInstanceLimits(Map<Class<?>, Integer> limits);
122 
build()123       public abstract StrictModeVmConfig build();
124 
Builder()125       Builder() {}
126     }
127 
StrictModeVmConfig()128     StrictModeVmConfig() {}
129   }
130 }
131