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| 1 /* | 1 /* |
| 2 * Copyright (C) 2011 Google Inc. All rights reserved. | 2 * Copyright (C) 2011 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 14 matching lines...) Expand all Loading... |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 */ | 29 */ |
| 30 | 30 |
| 31 #ifndef V8RecursionScope_h | 31 #ifndef V8RecursionScope_h |
| 32 #define V8RecursionScope_h | 32 #define V8RecursionScope_h |
| 33 | 33 |
| 34 #include "bindings/core/v8/V8PerIsolateData.h" | 34 #include "bindings/core/v8/V8PerIsolateData.h" |
| 35 #include "core/CoreExport.h" |
| 35 #include "platform/ScriptForbiddenScope.h" | 36 #include "platform/ScriptForbiddenScope.h" |
| 36 #include "wtf/Noncopyable.h" | 37 #include "wtf/Noncopyable.h" |
| 37 #include <v8.h> | 38 #include <v8.h> |
| 38 | 39 |
| 39 namespace blink { | 40 namespace blink { |
| 40 | 41 |
| 41 // C++ calls into script contexts which are "owned" by WebKit (created in a | 42 // C++ calls into script contexts which are "owned" by WebKit (created in a |
| 42 // process where WebKit.cpp initializes v8) must declare their type: | 43 // process where WebKit.cpp initializes v8) must declare their type: |
| 43 // | 44 // |
| 44 // 1. Calls into page/author script from a frame | 45 // 1. Calls into page/author script from a frame |
| 45 // 2. Calls into page/author script from a worker | 46 // 2. Calls into page/author script from a worker |
| 46 // 3. Calls into internal script (typically setup/teardown work) | 47 // 3. Calls into internal script (typically setup/teardown work) |
| 47 // | 48 // |
| 48 // Debug-time checking of this is enforced via this class. | 49 // Debug-time checking of this is enforced via this class. |
| 49 // | 50 // |
| 50 // Calls of type (1) should generally go through ScriptController, as inspector | 51 // Calls of type (1) should generally go through ScriptController, as inspector |
| 51 // instrumentation is needed. ScriptController allocates V8RecursionScope for yo
u. | 52 // instrumentation is needed. ScriptController allocates V8RecursionScope for yo
u. |
| 52 // Calls of type (2) should always stack-allocate a V8RecursionScope in the same | 53 // Calls of type (2) should always stack-allocate a V8RecursionScope in the same |
| 53 // block as the call into script. Calls of type (3) should stack allocate a | 54 // block as the call into script. Calls of type (3) should stack allocate a |
| 54 // V8RecursionScope::MicrotaskSuppression -- this skips work that is spec'd to | 55 // V8RecursionScope::MicrotaskSuppression -- this skips work that is spec'd to |
| 55 // happen at the end of the outer-most script stack frame of calls into page scr
ipt: | 56 // happen at the end of the outer-most script stack frame of calls into page scr
ipt: |
| 56 // | 57 // |
| 57 // http://www.whatwg.org/specs/web-apps/current-work/#perform-a-microtask-checkp
oint | 58 // http://www.whatwg.org/specs/web-apps/current-work/#perform-a-microtask-checkp
oint |
| 58 class V8RecursionScope { | 59 class CORE_EXPORT V8RecursionScope { |
| 59 STACK_ALLOCATED(); | 60 STACK_ALLOCATED(); |
| 60 public: | 61 public: |
| 61 explicit V8RecursionScope(v8::Isolate* isolate) | 62 explicit V8RecursionScope(v8::Isolate* isolate) |
| 62 : m_isolate(isolate) | 63 : m_isolate(isolate) |
| 63 { | 64 { |
| 64 RELEASE_ASSERT(!ScriptForbiddenScope::isScriptForbidden()); | 65 RELEASE_ASSERT(!ScriptForbiddenScope::isScriptForbidden()); |
| 65 V8PerIsolateData::from(m_isolate)->incrementRecursionLevel(); | 66 V8PerIsolateData::from(m_isolate)->incrementRecursionLevel(); |
| 66 // If you want V8 to autorun microtasks, this class needs to have a | 67 // If you want V8 to autorun microtasks, this class needs to have a |
| 67 // v8::Isolate::SuppressMicrotaskExecutionScope member. | 68 // v8::Isolate::SuppressMicrotaskExecutionScope member. |
| 68 ASSERT(!isolate->WillAutorunMicrotasks()); | 69 ASSERT(!isolate->WillAutorunMicrotasks()); |
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| 116 | 117 |
| 117 private: | 118 private: |
| 118 void didLeaveScriptContext(); | 119 void didLeaveScriptContext(); |
| 119 | 120 |
| 120 v8::Isolate* m_isolate; | 121 v8::Isolate* m_isolate; |
| 121 }; | 122 }; |
| 122 | 123 |
| 123 } // namespace blink | 124 } // namespace blink |
| 124 | 125 |
| 125 #endif // V8RecursionScope_h | 126 #endif // V8RecursionScope_h |
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