1 /*
2 * Copyright (C) 2009 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "bindings/v8/V8PerIsolateData.h"
28
29 #include "bindings/v8/DOMDataStore.h"
30 #include "bindings/v8/PageScriptDebugServer.h"
31 #include "bindings/v8/ScriptGCEvent.h"
32 #include "bindings/v8/ScriptProfiler.h"
33 #include "bindings/v8/V8Binding.h"
34 #include "bindings/v8/V8HiddenValue.h"
35 #include "bindings/v8/V8ObjectConstructor.h"
36 #include "bindings/v8/V8RecursionScope.h"
37 #include "bindings/v8/V8ScriptRunner.h"
38 #include "public/platform/Platform.h"
39 #include "wtf/MainThread.h"
40
41 namespace WebCore {
42
43 static V8PerIsolateData* mainThreadPerIsolateData = 0;
44
45 #ifndef NDEBUG
assertV8RecursionScope()46 static void assertV8RecursionScope()
47 {
48 ASSERT(V8RecursionScope::properlyUsed(v8::Isolate::GetCurrent()));
49 }
50 #endif
51
V8PerIsolateData(v8::Isolate * isolate)52 V8PerIsolateData::V8PerIsolateData(v8::Isolate* isolate)
53 : m_isolate(isolate)
54 , m_isolateHolder(adoptPtr(new gin::IsolateHolder(m_isolate, v8ArrayBufferAllocator())))
55 , m_stringCache(adoptPtr(new StringCache(m_isolate)))
56 , m_hiddenValue(adoptPtr(new V8HiddenValue()))
57 , m_constructorMode(ConstructorMode::CreateNewObject)
58 , m_recursionLevel(0)
59 #ifndef NDEBUG
60 , m_internalScriptRecursionLevel(0)
61 #endif
62 , m_gcEventData(adoptPtr(new GCEventData()))
63 , m_performingMicrotaskCheckpoint(false)
64 {
65 #ifndef NDEBUG
66 // currentThread will always be non-null in production, but can be null in Chromium unit tests.
67 if (blink::Platform::current()->currentThread())
68 isolate->AddCallCompletedCallback(&assertV8RecursionScope);
69 #endif
70 if (isMainThread()) {
71 mainThreadPerIsolateData = this;
72 PageScriptDebugServer::setMainThreadIsolate(isolate);
73 }
74 }
75
~V8PerIsolateData()76 V8PerIsolateData::~V8PerIsolateData()
77 {
78 if (m_scriptRegexpScriptState)
79 m_scriptRegexpScriptState->disposePerContextData();
80 if (isMainThread())
81 mainThreadPerIsolateData = 0;
82 }
83
mainThreadIsolate()84 v8::Isolate* V8PerIsolateData::mainThreadIsolate()
85 {
86 ASSERT(isMainThread());
87 ASSERT(mainThreadPerIsolateData);
88 return mainThreadPerIsolateData->isolate();
89 }
90
ensureInitialized(v8::Isolate * isolate)91 void V8PerIsolateData::ensureInitialized(v8::Isolate* isolate)
92 {
93 ASSERT(isolate);
94 if (!isolate->GetData(gin::kEmbedderBlink)) {
95 V8PerIsolateData* data = new V8PerIsolateData(isolate);
96 isolate->SetData(gin::kEmbedderBlink, data);
97 }
98 }
99
ensureLiveRoot()100 v8::Persistent<v8::Value>& V8PerIsolateData::ensureLiveRoot()
101 {
102 if (m_liveRoot.isEmpty())
103 m_liveRoot.set(m_isolate, v8::Null(m_isolate));
104 return m_liveRoot.getUnsafe();
105 }
106
dispose(v8::Isolate * isolate)107 void V8PerIsolateData::dispose(v8::Isolate* isolate)
108 {
109 #ifndef NDEBUG
110 if (blink::Platform::current()->currentThread())
111 isolate->RemoveCallCompletedCallback(&assertV8RecursionScope);
112 #endif
113 void* data = isolate->GetData(gin::kEmbedderBlink);
114 delete static_cast<V8PerIsolateData*>(data);
115 isolate->SetData(gin::kEmbedderBlink, 0);
116 }
117
currentDOMTemplateMap()118 V8PerIsolateData::DOMTemplateMap& V8PerIsolateData::currentDOMTemplateMap()
119 {
120 if (DOMWrapperWorld::current(m_isolate).isMainWorld())
121 return m_domTemplateMapForMainWorld;
122 return m_domTemplateMapForNonMainWorld;
123 }
124
domTemplate(void * domTemplateKey,v8::FunctionCallback callback,v8::Handle<v8::Value> data,v8::Handle<v8::Signature> signature,int length)125 v8::Handle<v8::FunctionTemplate> V8PerIsolateData::domTemplate(void* domTemplateKey, v8::FunctionCallback callback, v8::Handle<v8::Value> data, v8::Handle<v8::Signature> signature, int length)
126 {
127 DOMTemplateMap& domTemplateMap = currentDOMTemplateMap();
128 DOMTemplateMap::iterator result = domTemplateMap.find(domTemplateKey);
129 if (result != domTemplateMap.end())
130 return result->value.Get(m_isolate);
131
132 v8::Local<v8::FunctionTemplate> templ = v8::FunctionTemplate::New(m_isolate, callback, data, signature, length);
133 domTemplateMap.add(domTemplateKey, v8::Eternal<v8::FunctionTemplate>(m_isolate, templ));
134 return templ;
135 }
136
existingDOMTemplate(void * domTemplateKey)137 v8::Handle<v8::FunctionTemplate> V8PerIsolateData::existingDOMTemplate(void* domTemplateKey)
138 {
139 DOMTemplateMap& domTemplateMap = currentDOMTemplateMap();
140 DOMTemplateMap::iterator result = domTemplateMap.find(domTemplateKey);
141 if (result != domTemplateMap.end())
142 return result->value.Get(m_isolate);
143 return v8::Local<v8::FunctionTemplate>();
144 }
145
setDOMTemplate(void * domTemplateKey,v8::Handle<v8::FunctionTemplate> templ)146 void V8PerIsolateData::setDOMTemplate(void* domTemplateKey, v8::Handle<v8::FunctionTemplate> templ)
147 {
148 currentDOMTemplateMap().add(domTemplateKey, v8::Eternal<v8::FunctionTemplate>(m_isolate, v8::Local<v8::FunctionTemplate>(templ)));
149 }
150
ensureScriptRegexpContext()151 v8::Local<v8::Context> V8PerIsolateData::ensureScriptRegexpContext()
152 {
153 if (!m_scriptRegexpScriptState) {
154 v8::Local<v8::Context> context(v8::Context::New(m_isolate));
155 m_scriptRegexpScriptState = ScriptState::create(context, DOMWrapperWorld::create());
156 }
157 return m_scriptRegexpScriptState->context();
158 }
159
hasInstance(const WrapperTypeInfo * info,v8::Handle<v8::Value> value)160 bool V8PerIsolateData::hasInstance(const WrapperTypeInfo* info, v8::Handle<v8::Value> value)
161 {
162 return hasInstance(info, value, m_domTemplateMapForMainWorld)
163 || hasInstance(info, value, m_domTemplateMapForNonMainWorld);
164 }
165
hasInstance(const WrapperTypeInfo * info,v8::Handle<v8::Value> value,DOMTemplateMap & domTemplateMap)166 bool V8PerIsolateData::hasInstance(const WrapperTypeInfo* info, v8::Handle<v8::Value> value, DOMTemplateMap& domTemplateMap)
167 {
168 DOMTemplateMap::iterator result = domTemplateMap.find(info);
169 if (result == domTemplateMap.end())
170 return false;
171 v8::Handle<v8::FunctionTemplate> templ = result->value.Get(m_isolate);
172 return templ->HasInstance(value);
173 }
174
findInstanceInPrototypeChain(const WrapperTypeInfo * info,v8::Handle<v8::Value> value)175 v8::Handle<v8::Object> V8PerIsolateData::findInstanceInPrototypeChain(const WrapperTypeInfo* info, v8::Handle<v8::Value> value)
176 {
177 v8::Handle<v8::Object> wrapper = findInstanceInPrototypeChain(info, value, m_domTemplateMapForMainWorld);
178 if (!wrapper.IsEmpty())
179 return wrapper;
180 return findInstanceInPrototypeChain(info, value, m_domTemplateMapForNonMainWorld);
181 }
182
findInstanceInPrototypeChain(const WrapperTypeInfo * info,v8::Handle<v8::Value> value,DOMTemplateMap & domTemplateMap)183 v8::Handle<v8::Object> V8PerIsolateData::findInstanceInPrototypeChain(const WrapperTypeInfo* info, v8::Handle<v8::Value> value, DOMTemplateMap& domTemplateMap)
184 {
185 if (value.IsEmpty() || !value->IsObject())
186 return v8::Handle<v8::Object>();
187 DOMTemplateMap::iterator result = domTemplateMap.find(info);
188 if (result == domTemplateMap.end())
189 return v8::Handle<v8::Object>();
190 v8::Handle<v8::FunctionTemplate> templ = result->value.Get(m_isolate);
191 return v8::Handle<v8::Object>::Cast(value)->FindInstanceInPrototypeChain(templ);
192 }
193
constructorOfToString(const v8::FunctionCallbackInfo<v8::Value> & info)194 static void constructorOfToString(const v8::FunctionCallbackInfo<v8::Value>& info)
195 {
196 // The DOM constructors' toString functions grab the current toString
197 // for Functions by taking the toString function of itself and then
198 // calling it with the constructor as its receiver. This means that
199 // changes to the Function prototype chain or toString function are
200 // reflected when printing DOM constructors. The only wart is that
201 // changes to a DOM constructor's toString's toString will cause the
202 // toString of the DOM constructor itself to change. This is extremely
203 // obscure and unlikely to be a problem.
204 v8::Handle<v8::Value> value = info.Callee()->Get(v8AtomicString(info.GetIsolate(), "toString"));
205 if (!value->IsFunction()) {
206 v8SetReturnValue(info, v8::String::Empty(info.GetIsolate()));
207 return;
208 }
209 v8SetReturnValue(info, V8ScriptRunner::callInternalFunction(v8::Handle<v8::Function>::Cast(value), info.This(), 0, 0, info.GetIsolate()));
210 }
211
toStringTemplate()212 v8::Handle<v8::FunctionTemplate> V8PerIsolateData::toStringTemplate()
213 {
214 if (m_toStringTemplate.isEmpty())
215 m_toStringTemplate.set(m_isolate, v8::FunctionTemplate::New(m_isolate, constructorOfToString));
216 return m_toStringTemplate.newLocal(m_isolate);
217 }
218
219 } // namespace WebCore
220