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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 #ifndef ScriptState_h | 5 #ifndef ScriptState_h |
| 6 #define ScriptState_h | 6 #define ScriptState_h |
| 7 | 7 |
| 8 #include "bindings/v8/ScopedPersistent.h" | 8 #include "bindings/v8/ScopedPersistent.h" |
| 9 #include "bindings/v8/V8PerContextData.h" | 9 #include "bindings/v8/V8PerContextData.h" |
| 10 #include "wtf/RefCounted.h" | 10 #include "wtf/RefCounted.h" |
| 11 #include <v8.h> | 11 #include <v8.h> |
| 12 | 12 |
| 13 namespace WebCore { | 13 namespace WebCore { |
| 14 | 14 |
| 15 class DOMWindow; | 15 class DOMWindow; |
| 16 class DOMWrapperWorld; | 16 class DOMWrapperWorld; |
| 17 class ExecutionContext; | 17 class ExecutionContext; |
| 18 class LocalFrame; | 18 class LocalFrame; |
| 19 class V8DOMActivityLogger; |
| 19 | 20 |
| 20 // ScriptState is created when v8::Context is created. | 21 // ScriptState is created when v8::Context is created. |
| 21 // ScriptState is destroyed when v8::Context is garbage-collected and | 22 // ScriptState is destroyed when v8::Context is garbage-collected and |
| 22 // all V8 proxy objects that have references to the ScriptState are destructed. | 23 // all V8 proxy objects that have references to the ScriptState are destructed. |
| 23 class ScriptState : public RefCounted<ScriptState> { | 24 class ScriptState : public RefCounted<ScriptState> { |
| 24 WTF_MAKE_NONCOPYABLE(ScriptState); | 25 WTF_MAKE_NONCOPYABLE(ScriptState); |
| 25 public: | 26 public: |
| 26 class Scope { | 27 class Scope { |
| 27 public: | 28 public: |
| 28 // You need to make sure that scriptState->context() is not empty before
creating a Scope. | 29 // You need to make sure that scriptState->context() is not empty before
creating a Scope. |
| (...skipping 45 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 74 v8::Handle<v8::Context> context() const { return m_context.newLocal(m_isolat
e); } | 75 v8::Handle<v8::Context> context() const { return m_context.newLocal(m_isolat
e); } |
| 75 bool contextIsEmpty() const { return m_context.isEmpty(); } | 76 bool contextIsEmpty() const { return m_context.isEmpty(); } |
| 76 void clearContext() { return m_context.clear(); } | 77 void clearContext() { return m_context.clear(); } |
| 77 | 78 |
| 78 V8PerContextData* perContextData() const { return m_perContextData.get(); } | 79 V8PerContextData* perContextData() const { return m_perContextData.get(); } |
| 79 void disposePerContextData() { m_perContextData = nullptr; } | 80 void disposePerContextData() { m_perContextData = nullptr; } |
| 80 | 81 |
| 81 bool evalEnabled() const; | 82 bool evalEnabled() const; |
| 82 void setEvalEnabled(bool); | 83 void setEvalEnabled(bool); |
| 83 | 84 |
| 85 V8DOMActivityLogger* activityLogger() const { return m_activityLogger; } |
| 86 void setActivityLogger(V8DOMActivityLogger* activityLogger) { m_activityLogg
er = activityLogger; } |
| 87 |
| 84 private: | 88 private: |
| 85 ScriptState(v8::Handle<v8::Context>, PassRefPtr<DOMWrapperWorld>); | 89 ScriptState(v8::Handle<v8::Context>, PassRefPtr<DOMWrapperWorld>); |
| 86 | 90 |
| 87 v8::Isolate* m_isolate; | 91 v8::Isolate* m_isolate; |
| 88 // This persistent handle is weak. | 92 // This persistent handle is weak. |
| 89 ScopedPersistent<v8::Context> m_context; | 93 ScopedPersistent<v8::Context> m_context; |
| 90 | 94 |
| 91 // This RefPtr doesn't cause a cycle because all persistent handles that DOM
WrapperWorld holds are weak. | 95 // This RefPtr doesn't cause a cycle because all persistent handles that DOM
WrapperWorld holds are weak. |
| 92 RefPtr<DOMWrapperWorld> m_world; | 96 RefPtr<DOMWrapperWorld> m_world; |
| 93 | 97 |
| 94 // This OwnPtr causes a cycle: | 98 // This OwnPtr causes a cycle: |
| 95 // V8PerContextData --(Persistent)--> v8::Context --(RefPtr)--> ScriptState
--(OwnPtr)--> V8PerContextData | 99 // V8PerContextData --(Persistent)--> v8::Context --(RefPtr)--> ScriptState
--(OwnPtr)--> V8PerContextData |
| 96 // So you must explicitly clear the OwnPtr by calling disposePerContextData(
) | 100 // So you must explicitly clear the OwnPtr by calling disposePerContextData(
) |
| 97 // once you no longer need V8PerContextData. Otherwise, the v8::Context will
leak. | 101 // once you no longer need V8PerContextData. Otherwise, the v8::Context will
leak. |
| 98 OwnPtr<V8PerContextData> m_perContextData; | 102 OwnPtr<V8PerContextData> m_perContextData; |
| 103 // This is owned by a static hash map in V8DOMActivityLogger. |
| 104 V8DOMActivityLogger* m_activityLogger; |
| 99 }; | 105 }; |
| 100 | 106 |
| 101 // ScriptStateProtectingContext keeps the context associated with the ScriptStat
e alive. | 107 // ScriptStateProtectingContext keeps the context associated with the ScriptStat
e alive. |
| 102 // You need to call clear() once you no longer need the context. Otherwise, the
context will leak. | 108 // You need to call clear() once you no longer need the context. Otherwise, the
context will leak. |
| 103 class ScriptStateProtectingContext { | 109 class ScriptStateProtectingContext { |
| 104 WTF_MAKE_NONCOPYABLE(ScriptStateProtectingContext); | 110 WTF_MAKE_NONCOPYABLE(ScriptStateProtectingContext); |
| 105 public: | 111 public: |
| 106 ScriptStateProtectingContext(ScriptState* scriptState) | 112 ScriptStateProtectingContext(ScriptState* scriptState) |
| 107 : m_scriptState(scriptState) | 113 : m_scriptState(scriptState) |
| 108 { | 114 { |
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| 119 } | 125 } |
| 120 | 126 |
| 121 private: | 127 private: |
| 122 RefPtr<ScriptState> m_scriptState; | 128 RefPtr<ScriptState> m_scriptState; |
| 123 ScopedPersistent<v8::Context> m_context; | 129 ScopedPersistent<v8::Context> m_context; |
| 124 }; | 130 }; |
| 125 | 131 |
| 126 } | 132 } |
| 127 | 133 |
| 128 #endif // ScriptState_h | 134 #endif // ScriptState_h |
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