1 /*
2 * Copyright (C) 2012 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 #include "config.h"
32 #include "bindings/core/v8/V8PerContextData.h"
33
34 #include "bindings/core/v8/ScriptState.h"
35 #include "bindings/core/v8/V8Binding.h"
36 #include "bindings/core/v8/V8ObjectConstructor.h"
37 #include "wtf/StringExtras.h"
38
39 #include <stdlib.h>
40
41 namespace blink {
42
V8PerContextData(v8::Handle<v8::Context> context)43 V8PerContextData::V8PerContextData(v8::Handle<v8::Context> context)
44 : m_isolate(context->GetIsolate())
45 , m_wrapperBoilerplates(m_isolate)
46 , m_constructorMap(m_isolate)
47 , m_contextHolder(adoptPtr(new gin::ContextHolder(m_isolate)))
48 , m_context(m_isolate, context)
49 , m_customElementBindings(adoptPtr(new CustomElementBindingMap()))
50 , m_activityLogger(0)
51 , m_compiledPrivateScript(m_isolate)
52 {
53 m_contextHolder->SetContext(context);
54
55 v8::Context::Scope contextScope(context);
56 ASSERT(m_errorPrototype.isEmpty());
57 v8::Handle<v8::Object> object = v8::Handle<v8::Object>::Cast(context->Global()->Get(v8AtomicString(m_isolate, "Error")));
58 ASSERT(!object.IsEmpty());
59 v8::Handle<v8::Value> prototypeValue = object->Get(v8AtomicString(m_isolate, "prototype"));
60 ASSERT(!prototypeValue.IsEmpty());
61 m_errorPrototype.set(m_isolate, prototypeValue);
62 }
63
~V8PerContextData()64 V8PerContextData::~V8PerContextData()
65 {
66 }
67
create(v8::Handle<v8::Context> context)68 PassOwnPtr<V8PerContextData> V8PerContextData::create(v8::Handle<v8::Context> context)
69 {
70 return adoptPtr(new V8PerContextData(context));
71 }
72
from(v8::Handle<v8::Context> context)73 V8PerContextData* V8PerContextData::from(v8::Handle<v8::Context> context)
74 {
75 return ScriptState::from(context)->perContextData();
76 }
77
createWrapperFromCacheSlowCase(const WrapperTypeInfo * type)78 v8::Local<v8::Object> V8PerContextData::createWrapperFromCacheSlowCase(const WrapperTypeInfo* type)
79 {
80 ASSERT(!m_errorPrototype.isEmpty());
81
82 v8::Context::Scope scope(context());
83 v8::Local<v8::Function> function = constructorForType(type);
84 v8::Local<v8::Object> instanceTemplate = V8ObjectConstructor::newInstance(m_isolate, function);
85 if (!instanceTemplate.IsEmpty()) {
86 m_wrapperBoilerplates.Set(type, instanceTemplate);
87 return instanceTemplate->Clone();
88 }
89 return v8::Local<v8::Object>();
90 }
91
constructorForTypeSlowCase(const WrapperTypeInfo * type)92 v8::Local<v8::Function> V8PerContextData::constructorForTypeSlowCase(const WrapperTypeInfo* type)
93 {
94 ASSERT(!m_errorPrototype.isEmpty());
95
96 v8::Context::Scope scope(context());
97 v8::Handle<v8::FunctionTemplate> functionTemplate = type->domTemplate(m_isolate);
98 // Getting the function might fail if we're running out of stack or memory.
99 v8::TryCatch tryCatch;
100 v8::Local<v8::Function> function = functionTemplate->GetFunction();
101 if (function.IsEmpty())
102 return v8::Local<v8::Function>();
103
104 if (type->parentClass) {
105 v8::Local<v8::Object> prototypeTemplate = constructorForType(type->parentClass);
106 if (prototypeTemplate.IsEmpty())
107 return v8::Local<v8::Function>();
108 function->SetPrototype(prototypeTemplate);
109 }
110
111 v8::Local<v8::Value> prototypeValue = function->Get(v8AtomicString(m_isolate, "prototype"));
112 if (!prototypeValue.IsEmpty() && prototypeValue->IsObject()) {
113 v8::Local<v8::Object> prototypeObject = v8::Local<v8::Object>::Cast(prototypeValue);
114 if (prototypeObject->InternalFieldCount() == v8PrototypeInternalFieldcount
115 && type->wrapperTypePrototype == WrapperTypeInfo::WrapperTypeObjectPrototype)
116 prototypeObject->SetAlignedPointerInInternalField(v8PrototypeTypeIndex, const_cast<WrapperTypeInfo*>(type));
117 type->installConditionallyEnabledMethods(prototypeObject, m_isolate);
118 if (type->wrapperTypePrototype == WrapperTypeInfo::WrapperTypeExceptionPrototype)
119 prototypeObject->SetPrototype(m_errorPrototype.newLocal(m_isolate));
120 }
121
122 m_constructorMap.Set(type, function);
123
124 return function;
125 }
126
prototypeForType(const WrapperTypeInfo * type)127 v8::Local<v8::Object> V8PerContextData::prototypeForType(const WrapperTypeInfo* type)
128 {
129 v8::Local<v8::Object> constructor = constructorForType(type);
130 if (constructor.IsEmpty())
131 return v8::Local<v8::Object>();
132 return constructor->Get(v8String(m_isolate, "prototype")).As<v8::Object>();
133 }
134
addCustomElementBinding(CustomElementDefinition * definition,PassOwnPtr<CustomElementBinding> binding)135 void V8PerContextData::addCustomElementBinding(CustomElementDefinition* definition, PassOwnPtr<CustomElementBinding> binding)
136 {
137 ASSERT(!m_customElementBindings->contains(definition));
138 m_customElementBindings->add(definition, binding);
139 }
140
clearCustomElementBinding(CustomElementDefinition * definition)141 void V8PerContextData::clearCustomElementBinding(CustomElementDefinition* definition)
142 {
143 CustomElementBindingMap::iterator it = m_customElementBindings->find(definition);
144 ASSERT_WITH_SECURITY_IMPLICATION(it != m_customElementBindings->end());
145 m_customElementBindings->remove(it);
146 }
147
customElementBinding(CustomElementDefinition * definition)148 CustomElementBinding* V8PerContextData::customElementBinding(CustomElementDefinition* definition)
149 {
150 CustomElementBindingMap::const_iterator it = m_customElementBindings->find(definition);
151 ASSERT_WITH_SECURITY_IMPLICATION(it != m_customElementBindings->end());
152 return it->value.get();
153 }
154
155
createDebugData(const char * worldName,int debugId,v8::Isolate * isolate)156 static v8::Handle<v8::Value> createDebugData(const char* worldName, int debugId, v8::Isolate* isolate)
157 {
158 char buffer[32];
159 unsigned wanted;
160 if (debugId == -1)
161 wanted = snprintf(buffer, sizeof(buffer), "%s", worldName);
162 else
163 wanted = snprintf(buffer, sizeof(buffer), "%s,%d", worldName, debugId);
164
165 if (wanted < sizeof(buffer))
166 return v8AtomicString(isolate, buffer);
167
168 return v8::Undefined(isolate);
169 }
170
debugData(v8::Handle<v8::Context> context)171 static v8::Handle<v8::Value> debugData(v8::Handle<v8::Context> context)
172 {
173 v8::Context::Scope contextScope(context);
174 return context->GetEmbedderData(v8ContextDebugIdIndex);
175 }
176
setDebugData(v8::Handle<v8::Context> context,v8::Handle<v8::Value> value)177 static void setDebugData(v8::Handle<v8::Context> context, v8::Handle<v8::Value> value)
178 {
179 v8::Context::Scope contextScope(context);
180 context->SetEmbedderData(v8ContextDebugIdIndex, value);
181 }
182
setContextDebugData(v8::Handle<v8::Context> context,const char * worldName,int debugId)183 bool V8PerContextDebugData::setContextDebugData(v8::Handle<v8::Context> context, const char* worldName, int debugId)
184 {
185 if (!debugData(context)->IsUndefined())
186 return false;
187 v8::HandleScope scope(context->GetIsolate());
188 v8::Handle<v8::Value> debugData = createDebugData(worldName, debugId, context->GetIsolate());
189 setDebugData(context, debugData);
190 return true;
191 }
192
contextDebugId(v8::Handle<v8::Context> context)193 int V8PerContextDebugData::contextDebugId(v8::Handle<v8::Context> context)
194 {
195 v8::HandleScope scope(context->GetIsolate());
196 v8::Handle<v8::Value> data = debugData(context);
197
198 if (!data->IsString())
199 return -1;
200 v8::String::Utf8Value utf8(data);
201 char* comma = strnstr(*utf8, ",", utf8.length());
202 if (!comma)
203 return -1;
204 return atoi(comma + 1);
205 }
206
compiledPrivateScript(String className)207 v8::Handle<v8::Value> V8PerContextData::compiledPrivateScript(String className)
208 {
209 return m_compiledPrivateScript.Get(className);
210 }
211
setCompiledPrivateScript(String className,v8::Handle<v8::Value> compiledObject)212 void V8PerContextData::setCompiledPrivateScript(String className, v8::Handle<v8::Value> compiledObject)
213 {
214 m_compiledPrivateScript.Set(className, compiledObject);
215 }
216
217 } // namespace blink
218