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/*
* 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.os.Build;
import android.os.StrictMode;
import android.support.annotation.Nullable;
import com.android.dialer.common.Assert;
import com.google.auto.value.AutoValue;
import java.util.Map;
import java.util.Map.Entry;
/** Utilities for enforcing strict-mode in an app. */
final class StrictModeUtils {
/**
* Set the recommended policy for the app.
*
* @param threadPenalties policy with preferred penalties. Detection bits will be ignored.
*/
static void setRecommendedMainThreadPolicy(StrictMode.ThreadPolicy threadPenalties) {
StrictMode.ThreadPolicy threadPolicy =
new StrictMode.ThreadPolicy.Builder(threadPenalties).detectAll().build();
StrictMode.setThreadPolicy(threadPolicy);
}
/**
* Set the recommended policy for the app.
*
* @param vmPenalties policy with preferred penalties. Detection bits should be unset.
*/
static void setRecommendedVMPolicy(StrictMode.VmPolicy vmPenalties) {
setRecommendedVMPolicy(vmPenalties, StrictModeVmConfig.empty());
}
/**
* Set the recommended policy for the app.
*
* @param vmPenalties policy with preferred penalties. Detection bits should be unset.
*/
private static void setRecommendedVMPolicy(
StrictMode.VmPolicy vmPenalties, StrictModeVmConfig config) {
Assert.isNotNull(config);
StrictMode.VmPolicy.Builder vmPolicyBuilder =
new StrictMode.VmPolicy.Builder(vmPenalties)
.detectLeakedClosableObjects()
.detectLeakedSqlLiteObjects();
if (Build.VERSION.SDK_INT >= 16) {
vmPolicyBuilder.detectLeakedRegistrationObjects();
}
if (Build.VERSION.SDK_INT >= 18) {
vmPolicyBuilder.detectFileUriExposure();
}
if (Build.VERSION.SDK_INT >= 21) {
// Even though this API is available earlier, it did not properly run finalizers.
// This avoids lots of false positives.
// TODO(zachh): Use LeakCanary and remove this line.
vmPolicyBuilder.detectActivityLeaks();
if (config.maxInstanceLimits() != null) {
for (Entry<Class<?>, Integer> entry : config.maxInstanceLimits().entrySet()) {
vmPolicyBuilder.setClassInstanceLimit(entry.getKey(), entry.getValue());
}
}
}
if (Build.VERSION.SDK_INT >= 23) {
// TODO(azlatin): Enable clear-text check once b/36730713 is fixed.
// vmPolicyBuilder.detectCleartextNetwork();
}
// Once OC Lands:
// .detectContentUriWithoutPermission()
// .detectUntaggedSockets()
StrictMode.setVmPolicy(vmPolicyBuilder.build());
}
/** VmPolicy configuration. */
@AutoValue
abstract static class StrictModeVmConfig {
/** A map of a class to the maximum number of allowed instances of that class. */
@Nullable
abstract Map<Class<?>, Integer> maxInstanceLimits();
public static StrictModeVmConfig empty() {
return builder().build();
}
public static Builder builder() {
return new AutoValue_StrictModeUtils_StrictModeVmConfig.Builder();
}
/** VmPolicy configuration builder. */
@AutoValue.Builder
public abstract static class Builder {
public abstract Builder setMaxInstanceLimits(Map<Class<?>, Integer> limits);
public abstract StrictModeVmConfig build();
Builder() {}
}
StrictModeVmConfig() {}
}
private StrictModeUtils() {}
}
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