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| 1 /* | |
| 2 * Copyright (C) 2011 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 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. | |
| 29 */ | |
| 30 | |
| 31 #ifndef V8RecursionScope_h | |
| 32 #define V8RecursionScope_h | |
| 33 | |
| 34 #include "bindings/v8/V8PerIsolateData.h" | |
| 35 #include "core/dom/ExecutionContext.h" | |
| 36 #include "core/dom/ScriptForbiddenScope.h" | |
| 37 #include "wtf/Noncopyable.h" | |
| 38 #include <v8.h> | |
| 39 | |
| 40 namespace WebCore { | |
| 41 | |
| 42 // C++ calls into script contexts which are "owned" by WebKit (created in a | |
| 43 // process where WebKit.cpp initializes v8) must declare their type: | |
| 44 // | |
| 45 // 1. Calls into page/author script from a frame | |
| 46 // 2. Calls into page/author script from a worker | |
| 47 // 3. Calls into internal script (typically setup/teardown work) | |
| 48 // | |
| 49 // Debug-time checking of this is enforced via this class. | |
| 50 // | |
| 51 // Calls of type (1) should generally go through ScriptController, as inspector | |
| 52 // instrumentation is needed. ScriptController allocates V8RecursionScope for yo
u. | |
| 53 // Calls of type (2) should always stack-allocate a V8RecursionScope in the same | |
| 54 // block as the call into script. Calls of type (3) should stack allocate a | |
| 55 // V8RecursionScope::MicrotaskSuppression -- this skips work that is spec'd to | |
| 56 // happen at the end of the outer-most script stack frame of calls into page scr
ipt: | |
| 57 // | |
| 58 // http://www.whatwg.org/specs/web-apps/current-work/#perform-a-microtask-checkp
oint | |
| 59 class V8RecursionScope { | |
| 60 WTF_MAKE_NONCOPYABLE(V8RecursionScope); | |
| 61 public: | |
| 62 V8RecursionScope(v8::Isolate* isolate, ExecutionContext* context) | |
| 63 : m_isolate(isolate) | |
| 64 , m_executionContext(*context) | |
| 65 { | |
| 66 V8PerIsolateData::from(m_isolate)->incrementRecursionLevel(); | |
| 67 ASSERT(!ScriptForbiddenScope::isScriptForbidden()); | |
| 68 // If you want V8 to autorun microtasks, this class needs to have a | |
| 69 // v8::Isolate::SuppressMicrotaskExecutionScope member. | |
| 70 ASSERT(!isolate->WillAutorunMicrotasks()); | |
| 71 } | |
| 72 | |
| 73 ~V8RecursionScope() | |
| 74 { | |
| 75 if (!V8PerIsolateData::from(m_isolate)->decrementRecursionLevel()) | |
| 76 didLeaveScriptContext(); | |
| 77 } | |
| 78 | |
| 79 static int recursionLevel(v8::Isolate* isolate) | |
| 80 { | |
| 81 return V8PerIsolateData::from(isolate)->recursionLevel(); | |
| 82 } | |
| 83 | |
| 84 #ifndef NDEBUG | |
| 85 static bool properlyUsed(v8::Isolate* isolate) | |
| 86 { | |
| 87 return recursionLevel(isolate) > 0 || V8PerIsolateData::from(isolate)->i
nternalScriptRecursionLevel() > 0; | |
| 88 } | |
| 89 #endif | |
| 90 | |
| 91 class MicrotaskSuppression { | |
| 92 public: | |
| 93 MicrotaskSuppression(v8::Isolate* isolate) | |
| 94 #ifndef NDEBUG | |
| 95 : m_isolate(isolate) | |
| 96 #endif | |
| 97 { | |
| 98 ASSERT(!ScriptForbiddenScope::isScriptForbidden()); | |
| 99 #ifndef NDEBUG | |
| 100 V8PerIsolateData::from(m_isolate)->incrementInternalScriptRecursionL
evel(); | |
| 101 #endif | |
| 102 } | |
| 103 | |
| 104 ~MicrotaskSuppression() | |
| 105 { | |
| 106 #ifndef NDEBUG | |
| 107 V8PerIsolateData::from(m_isolate)->decrementInternalScriptRecursionL
evel(); | |
| 108 #endif | |
| 109 } | |
| 110 | |
| 111 private: | |
| 112 #ifndef NDEBUG | |
| 113 v8::Isolate* m_isolate; | |
| 114 #endif | |
| 115 }; | |
| 116 | |
| 117 private: | |
| 118 void didLeaveScriptContext(); | |
| 119 | |
| 120 v8::Isolate* m_isolate; | |
| 121 ExecutionContext& m_executionContext; | |
| 122 }; | |
| 123 | |
| 124 } // namespace WebCore | |
| 125 | |
| 126 #endif // V8RecursionScope_h | |
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Chromium Code Reviews
Issue 351423002:
Moved files under Source/bindings/v8 to Source/bindings/core/v8. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk