OLD | NEW |
1 /* | 1 /* |
2 * Copyright (C) 2009, 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2009, 2012 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
(...skipping 25 matching lines...) Expand all Loading... |
36 #include "wtf/OwnPtr.h" | 36 #include "wtf/OwnPtr.h" |
37 #include "wtf/ThreadingPrimitives.h" | 37 #include "wtf/ThreadingPrimitives.h" |
38 #include "wtf/text/TextPosition.h" | 38 #include "wtf/text/TextPosition.h" |
39 #include <v8.h> | 39 #include <v8.h> |
40 | 40 |
41 namespace blink { | 41 namespace blink { |
42 | 42 |
43 class ErrorEvent; | 43 class ErrorEvent; |
44 class ExceptionState; | 44 class ExceptionState; |
45 class ScriptSourceCode; | 45 class ScriptSourceCode; |
46 class ScriptValue; | |
47 class WorkerGlobalScope; | 46 class WorkerGlobalScope; |
48 class WorkerGlobalScopeExecutionState; | |
49 | 47 |
50 class WorkerScriptController { | 48 class WorkerScriptController { |
51 public: | 49 public: |
52 explicit WorkerScriptController(WorkerGlobalScope&); | 50 explicit WorkerScriptController(WorkerGlobalScope&); |
53 ~WorkerScriptController(); | 51 ~WorkerScriptController(); |
54 | 52 |
55 WorkerGlobalScope& workerGlobalScope() { return m_workerGlobalScope; } | 53 bool isExecutionForbidden() const; |
56 | 54 bool isExecutionTerminating() const; |
57 bool initializeContextIfNeeded(); | |
58 | |
59 void evaluate(const ScriptSourceCode&, RefPtrWillBeRawPtr<ErrorEvent>* = 0); | 55 void evaluate(const ScriptSourceCode&, RefPtrWillBeRawPtr<ErrorEvent>* = 0); |
60 | 56 |
| 57 // Prevents future JavaScript execution. See |
| 58 // scheduleExecutionTermination, isExecutionForbidden. |
| 59 void forbidExecution(); |
| 60 |
| 61 // Used by WorkerThread: |
| 62 bool initializeContextIfNeeded(); |
| 63 // Async request to terminate future JavaScript execution on the |
| 64 // worker thread. JavaScript evaluation exits with a |
| 65 // non-continuable exception and WorkerScriptController calls |
| 66 // forbidExecution to prevent further JavaScript execution. Use |
| 67 // forbidExecution()/isExecutionForbidden() to guard against |
| 68 // reentry into JavaScript. |
| 69 void scheduleExecutionTermination(); |
| 70 |
| 71 // Used by WorkerGlobalScope: |
61 void rethrowExceptionFromImportedScript(PassRefPtrWillBeRawPtr<ErrorEvent>,
ExceptionState&); | 72 void rethrowExceptionFromImportedScript(PassRefPtrWillBeRawPtr<ErrorEvent>,
ExceptionState&); |
62 | |
63 // Async request to terminate a future JS execution. Eventually causes termi
nation | |
64 // exception raised during JS execution, if the worker thread happens to run
JS. | |
65 // After JS execution was terminated in this way, the Worker thread has to u
se | |
66 // forbidExecution()/isExecutionForbidden() to guard against reentry into JS
. | |
67 // Can be called from any thread. | |
68 void scheduleExecutionTermination(); | |
69 bool isExecutionTerminating() const; | |
70 | |
71 // Called on Worker thread when JS exits with termination exception caused b
y forbidExecution() request, | |
72 // or by Worker thread termination code to prevent future entry into JS. | |
73 void forbidExecution(); | |
74 bool isExecutionForbidden() const; | |
75 | |
76 void disableEval(const String&); | 73 void disableEval(const String&); |
77 | |
78 v8::Isolate* isolate() const { return m_isolate; } | |
79 DOMWrapperWorld& world() const { return *m_world; } | |
80 ScriptState* scriptState() { return m_scriptState.get(); } | |
81 v8::Local<v8::Context> context() { return m_scriptState ? m_scriptState->con
text() : v8::Local<v8::Context>(); } | |
82 bool isContextInitialized() { return m_scriptState && !!m_scriptState->perCo
ntextData(); } | |
83 | |
84 // Send a notification about current thread is going to be idle. | 74 // Send a notification about current thread is going to be idle. |
85 // Returns true if the embedder should stop calling idleNotification | 75 // Returns true if the embedder should stop calling idleNotification |
86 // until real work has been done. | 76 // until real work has been done. |
87 bool idleNotification() { return m_isolate->IdleNotification(1000); } | 77 bool idleNotification() { return m_isolate->IdleNotification(1000); } |
88 | 78 |
| 79 // Used by Inspector agents: |
| 80 ScriptState* scriptState() { return m_scriptState.get(); } |
| 81 |
| 82 // Used by V8 bindings: |
| 83 v8::Local<v8::Context> context() { return m_scriptState ? m_scriptState->con
text() : v8::Local<v8::Context>(); } |
| 84 |
89 private: | 85 private: |
90 class WorkerGlobalScopeExecutionState; | 86 class WorkerGlobalScopeExecutionState; |
91 | 87 |
| 88 bool isContextInitialized() { return m_scriptState && !!m_scriptState->perCo
ntextData(); } |
| 89 |
92 // Evaluate a script file in the current execution environment. | 90 // Evaluate a script file in the current execution environment. |
93 ScriptValue evaluate(const String& script, const String& fileName, const Tex
tPosition& scriptStartPosition); | 91 ScriptValue evaluate(const String& script, const String& fileName, const Tex
tPosition& scriptStartPosition); |
94 | 92 |
95 v8::Isolate* m_isolate; | 93 v8::Isolate* m_isolate; |
96 WorkerGlobalScope& m_workerGlobalScope; | 94 WorkerGlobalScope& m_workerGlobalScope; |
97 RefPtr<ScriptState> m_scriptState; | 95 RefPtr<ScriptState> m_scriptState; |
98 RefPtr<DOMWrapperWorld> m_world; | 96 RefPtr<DOMWrapperWorld> m_world; |
99 String m_disableEvalPending; | 97 String m_disableEvalPending; |
100 bool m_executionForbidden; | 98 bool m_executionForbidden; |
101 bool m_executionScheduledToTerminate; | 99 bool m_executionScheduledToTerminate; |
102 mutable Mutex m_scheduledTerminationMutex; | 100 mutable Mutex m_scheduledTerminationMutex; |
103 | 101 |
104 // |m_globalScopeExecutionState| refers to a stack object | 102 // |m_globalScopeExecutionState| refers to a stack object |
105 // that evaluate() allocates; evaluate() ensuring that the | 103 // that evaluate() allocates; evaluate() ensuring that the |
106 // pointer reference to it is removed upon returning. Hence | 104 // pointer reference to it is removed upon returning. Hence |
107 // kept as a bare pointer here, and not a Persistent with | 105 // kept as a bare pointer here, and not a Persistent with |
108 // Oilpan enabled; stack scanning will visit the object and | 106 // Oilpan enabled; stack scanning will visit the object and |
109 // trace its on-heap fields. | 107 // trace its on-heap fields. |
110 GC_PLUGIN_IGNORE("394615") | 108 GC_PLUGIN_IGNORE("394615") |
111 WorkerGlobalScopeExecutionState* m_globalScopeExecutionState; | 109 WorkerGlobalScopeExecutionState* m_globalScopeExecutionState; |
112 OwnPtr<V8IsolateInterruptor> m_interruptor; | 110 OwnPtr<V8IsolateInterruptor> m_interruptor; |
113 }; | 111 }; |
114 | 112 |
115 } // namespace blink | 113 } // namespace blink |
116 | 114 |
117 #endif // WorkerScriptController_h | 115 #endif // WorkerScriptController_h |
OLD | NEW |