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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.content.browser; | 5 package org.chromium.content.browser; |
6 | 6 |
7 import android.content.Context; | 7 import android.content.Context; |
8 import android.os.Bundle; | 8 import android.os.Bundle; |
9 | 9 |
10 import org.chromium.base.Log; | 10 import org.chromium.base.Log; |
11 import org.chromium.base.VisibleForTesting; | 11 import org.chromium.base.VisibleForTesting; |
12 import org.chromium.base.process_launcher.ChildProcessCreationParams; | 12 import org.chromium.base.process_launcher.ChildProcessCreationParams; |
13 | 13 |
14 /** | 14 /** |
15 * ManagedChildProcessConnection is a connection to a child service that can hol
d several bindings | 15 * ManagedChildProcessConnection is a connection to a child service that can hol
d several bindings |
16 * to the service so it can be more or less agressively protected against OOM. | 16 * to the service so it can be more or less agressively protected against OOM. |
17 * Accessed from the launcher thread. (but for isOomProtectedOrWasWhenDied()). | 17 * Accessed from the launcher thread. (but for isOomProtectedOrWasWhenDied()). |
18 */ | 18 */ |
19 public class ManagedChildProcessConnection extends BaseChildProcessConnection { | 19 public class ManagedChildProcessConnection extends BaseChildProcessConnection { |
20 private static final String TAG = "ManChildProcessConn"; | 20 private static final String TAG = "ManChildProcessConn"; |
21 | 21 |
22 public static final Factory FACTORY = new BaseChildProcessConnection.Factory
() { | 22 public static final Factory FACTORY = new BaseChildProcessConnection.Factory
() { |
23 @Override | 23 @Override |
24 public BaseChildProcessConnection create(Context context, int number, bo
olean sandboxed, | 24 public BaseChildProcessConnection create(Context context, boolean sandbo
xed, |
25 DeathCallback deathCallback, String serviceClassName, | 25 DeathCallback deathCallback, String serviceClassName, |
26 Bundle childProcessCommonParameters, ChildProcessCreationParams
creationParams) { | 26 Bundle childProcessCommonParameters, ChildProcessCreationParams
creationParams) { |
27 assert LauncherThread.runningOnLauncherThread(); | 27 assert LauncherThread.runningOnLauncherThread(); |
28 return new ManagedChildProcessConnection(context, number, sandboxed,
deathCallback, | 28 return new ManagedChildProcessConnection(context, sandboxed, deathCa
llback, |
29 serviceClassName, childProcessCommonParameters, creationPara
ms); | 29 serviceClassName, childProcessCommonParameters, creationPara
ms); |
30 } | 30 } |
31 }; | 31 }; |
32 | 32 |
33 // Initial binding protects the newly spawned process from being killed befo
re it is put to use, | 33 // Initial binding protects the newly spawned process from being killed befo
re it is put to use, |
34 // it is maintained between calls to start() and removeInitialBinding(). | 34 // it is maintained between calls to start() and removeInitialBinding(). |
35 private final ChildServiceConnection mInitialBinding; | 35 private final ChildServiceConnection mInitialBinding; |
36 | 36 |
37 // Strong binding will make the service priority equal to the priority of th
e activity. We want | 37 // Strong binding will make the service priority equal to the priority of th
e activity. We want |
38 // the OS to be able to kill background renderers as it kills other backgrou
nd apps, so strong | 38 // the OS to be able to kill background renderers as it kills other backgrou
nd apps, so strong |
(...skipping 14 matching lines...) Expand all Loading... |
53 private final ChildServiceConnection mModerateBinding; | 53 private final ChildServiceConnection mModerateBinding; |
54 | 54 |
55 // Indicates whether the connection is OOM protected (if the connection is u
nbound, it contains | 55 // Indicates whether the connection is OOM protected (if the connection is u
nbound, it contains |
56 // the state at time of unbinding). | 56 // the state at time of unbinding). |
57 private boolean mOomProtected; | 57 private boolean mOomProtected; |
58 | 58 |
59 // Set to true once unbind() was called. | 59 // Set to true once unbind() was called. |
60 private boolean mUnbound; | 60 private boolean mUnbound; |
61 | 61 |
62 @VisibleForTesting | 62 @VisibleForTesting |
63 ManagedChildProcessConnection(Context context, int number, boolean sandboxed
, | 63 ManagedChildProcessConnection(Context context, boolean sandboxed, DeathCallb
ack deathCallback, |
64 DeathCallback deathCallback, String serviceClassName, | 64 String serviceClassName, Bundle childProcessCommonParameters, |
65 Bundle childProcessCommonParameters, ChildProcessCreationParams crea
tionParams) { | 65 ChildProcessCreationParams creationParams) { |
66 super(context, number, sandboxed, deathCallback, serviceClassName, | 66 super(context, sandboxed, deathCallback, serviceClassName, childProcessC
ommonParameters, |
67 childProcessCommonParameters, creationParams); | 67 creationParams); |
68 | 68 |
69 int initialFlags = Context.BIND_AUTO_CREATE; | 69 int initialFlags = Context.BIND_AUTO_CREATE; |
70 int extraBindFlags = shouldBindAsExportedService() ? Context.BIND_EXTERN
AL_SERVICE : 0; | 70 int extraBindFlags = shouldBindAsExportedService() ? Context.BIND_EXTERN
AL_SERVICE : 0; |
71 mInitialBinding = createServiceConnection(initialFlags | extraBindFlags)
; | 71 mInitialBinding = createServiceConnection(initialFlags | extraBindFlags)
; |
72 mStrongBinding = createServiceConnection( | 72 mStrongBinding = createServiceConnection( |
73 Context.BIND_AUTO_CREATE | Context.BIND_IMPORTANT | extraBindFla
gs); | 73 Context.BIND_AUTO_CREATE | Context.BIND_IMPORTANT | extraBindFla
gs); |
74 mWaivedBinding = createServiceConnection( | 74 mWaivedBinding = createServiceConnection( |
75 Context.BIND_AUTO_CREATE | Context.BIND_WAIVE_PRIORITY | extraBi
ndFlags); | 75 Context.BIND_AUTO_CREATE | Context.BIND_WAIVE_PRIORITY | extraBi
ndFlags); |
76 mModerateBinding = createServiceConnection(Context.BIND_AUTO_CREATE | ex
traBindFlags); | 76 mModerateBinding = createServiceConnection(Context.BIND_AUTO_CREATE | ex
traBindFlags); |
77 } | 77 } |
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188 mModerateBinding.unbind(); | 188 mModerateBinding.unbind(); |
189 } | 189 } |
190 | 190 |
191 // Should be called every time the mInitialBinding or mStrongBinding are bou
nd/unbound. | 191 // Should be called every time the mInitialBinding or mStrongBinding are bou
nd/unbound. |
192 private void updateOomProtectedState() { | 192 private void updateOomProtectedState() { |
193 if (!mUnbound) { | 193 if (!mUnbound) { |
194 mOomProtected = mInitialBinding.isBound() || mStrongBinding.isBound(
); | 194 mOomProtected = mInitialBinding.isBound() || mStrongBinding.isBound(
); |
195 } | 195 } |
196 } | 196 } |
197 } | 197 } |
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