1 /*
2 * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
3 * Copyright (C) 2008 Cameron Zwarich (cwzwarich@uwaterloo.ca)
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
15 * its contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "config.h"
31 #include "JSGlobalObject.h"
32
33 #include "JSCallbackConstructor.h"
34 #include "JSCallbackFunction.h"
35 #include "JSCallbackObject.h"
36
37 #include "Arguments.h"
38 #include "ArrayConstructor.h"
39 #include "ArrayPrototype.h"
40 #include "BooleanConstructor.h"
41 #include "BooleanPrototype.h"
42 #include "CodeBlock.h"
43 #include "DateConstructor.h"
44 #include "DatePrototype.h"
45 #include "ErrorConstructor.h"
46 #include "ErrorPrototype.h"
47 #include "FunctionConstructor.h"
48 #include "FunctionPrototype.h"
49 #include "GlobalEvalFunction.h"
50 #include "JSFunction.h"
51 #include "JSGlobalObjectFunctions.h"
52 #include "JSLock.h"
53 #include "JSONObject.h"
54 #include "Interpreter.h"
55 #include "MathObject.h"
56 #include "NativeErrorConstructor.h"
57 #include "NativeErrorPrototype.h"
58 #include "NumberConstructor.h"
59 #include "NumberPrototype.h"
60 #include "ObjectConstructor.h"
61 #include "ObjectPrototype.h"
62 #include "Profiler.h"
63 #include "PrototypeFunction.h"
64 #include "RegExpConstructor.h"
65 #include "RegExpMatchesArray.h"
66 #include "RegExpObject.h"
67 #include "RegExpPrototype.h"
68 #include "ScopeChainMark.h"
69 #include "StringConstructor.h"
70 #include "StringPrototype.h"
71 #include "Debugger.h"
72
73 namespace JSC {
74
75 ASSERT_CLASS_FITS_IN_CELL(JSGlobalObject);
76
77 // Default number of ticks before a timeout check should be done.
78 static const int initialTickCountThreshold = 255;
79
80 // Preferred number of milliseconds between each timeout check
81 static const int preferredScriptCheckTimeInterval = 1000;
82
markIfNeeded(MarkStack & markStack,JSValue v)83 static inline void markIfNeeded(MarkStack& markStack, JSValue v)
84 {
85 if (v)
86 markStack.append(v);
87 }
88
markIfNeeded(MarkStack & markStack,const RefPtr<Structure> & s)89 static inline void markIfNeeded(MarkStack& markStack, const RefPtr<Structure>& s)
90 {
91 if (s)
92 s->markAggregate(markStack);
93 }
94
~JSGlobalObject()95 JSGlobalObject::~JSGlobalObject()
96 {
97 ASSERT(JSLock::currentThreadIsHoldingLock());
98
99 if (d()->debugger)
100 d()->debugger->detach(this);
101
102 Profiler** profiler = Profiler::enabledProfilerReference();
103 if (UNLIKELY(*profiler != 0)) {
104 (*profiler)->stopProfiling(globalExec(), UString());
105 }
106
107 d()->next->d()->prev = d()->prev;
108 d()->prev->d()->next = d()->next;
109 JSGlobalObject*& headObject = head();
110 if (headObject == this)
111 headObject = d()->next;
112 if (headObject == this)
113 headObject = 0;
114
115 HashSet<ProgramCodeBlock*>::const_iterator end = codeBlocks().end();
116 for (HashSet<ProgramCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
117 (*it)->clearGlobalObject();
118
119 RegisterFile& registerFile = globalData()->interpreter->registerFile();
120 if (registerFile.globalObject() == this) {
121 registerFile.setGlobalObject(0);
122 registerFile.setNumGlobals(0);
123 }
124 delete d();
125 }
126
init(JSObject * thisValue)127 void JSGlobalObject::init(JSObject* thisValue)
128 {
129 ASSERT(JSLock::currentThreadIsHoldingLock());
130
131 d()->globalData = Heap::heap(this)->globalData();
132 d()->globalScopeChain = ScopeChain(this, d()->globalData.get(), thisValue);
133
134 JSGlobalObject::globalExec()->init(0, 0, d()->globalScopeChain.node(), CallFrame::noCaller(), 0, 0, 0);
135
136 if (JSGlobalObject*& headObject = head()) {
137 d()->prev = headObject;
138 d()->next = headObject->d()->next;
139 headObject->d()->next->d()->prev = this;
140 headObject->d()->next = this;
141 } else
142 headObject = d()->next = d()->prev = this;
143
144 d()->recursion = 0;
145 d()->debugger = 0;
146
147 d()->profileGroup = 0;
148
149 reset(prototype());
150 }
151
put(ExecState * exec,const Identifier & propertyName,JSValue value,PutPropertySlot & slot)152 void JSGlobalObject::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
153 {
154 ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
155
156 if (symbolTablePut(propertyName, value))
157 return;
158 JSVariableObject::put(exec, propertyName, value, slot);
159 }
160
putWithAttributes(ExecState * exec,const Identifier & propertyName,JSValue value,unsigned attributes)161 void JSGlobalObject::putWithAttributes(ExecState* exec, const Identifier& propertyName, JSValue value, unsigned attributes)
162 {
163 ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
164
165 if (symbolTablePutWithAttributes(propertyName, value, attributes))
166 return;
167
168 JSValue valueBefore = getDirect(propertyName);
169 PutPropertySlot slot;
170 JSVariableObject::put(exec, propertyName, value, slot);
171 if (!valueBefore) {
172 JSValue valueAfter = getDirect(propertyName);
173 if (valueAfter)
174 JSObject::putWithAttributes(exec, propertyName, valueAfter, attributes);
175 }
176 }
177
defineGetter(ExecState * exec,const Identifier & propertyName,JSObject * getterFunc)178 void JSGlobalObject::defineGetter(ExecState* exec, const Identifier& propertyName, JSObject* getterFunc)
179 {
180 PropertySlot slot;
181 if (!symbolTableGet(propertyName, slot))
182 JSVariableObject::defineGetter(exec, propertyName, getterFunc);
183 }
184
defineSetter(ExecState * exec,const Identifier & propertyName,JSObject * setterFunc)185 void JSGlobalObject::defineSetter(ExecState* exec, const Identifier& propertyName, JSObject* setterFunc)
186 {
187 PropertySlot slot;
188 if (!symbolTableGet(propertyName, slot))
189 JSVariableObject::defineSetter(exec, propertyName, setterFunc);
190 }
191
lastInPrototypeChain(JSObject * object)192 static inline JSObject* lastInPrototypeChain(JSObject* object)
193 {
194 JSObject* o = object;
195 while (o->prototype().isObject())
196 o = asObject(o->prototype());
197 return o;
198 }
199
reset(JSValue prototype)200 void JSGlobalObject::reset(JSValue prototype)
201 {
202 ExecState* exec = JSGlobalObject::globalExec();
203
204 // Prototypes
205
206 d()->functionPrototype = new (exec) FunctionPrototype(exec, FunctionPrototype::createStructure(jsNull())); // The real prototype will be set once ObjectPrototype is created.
207 d()->prototypeFunctionStructure = PrototypeFunction::createStructure(d()->functionPrototype);
208 NativeFunctionWrapper* callFunction = 0;
209 NativeFunctionWrapper* applyFunction = 0;
210 d()->functionPrototype->addFunctionProperties(exec, d()->prototypeFunctionStructure.get(), &callFunction, &applyFunction);
211 d()->callFunction = callFunction;
212 d()->applyFunction = applyFunction;
213 d()->objectPrototype = new (exec) ObjectPrototype(exec, ObjectPrototype::createStructure(jsNull()), d()->prototypeFunctionStructure.get());
214 d()->functionPrototype->structure()->setPrototypeWithoutTransition(d()->objectPrototype);
215
216 d()->emptyObjectStructure = d()->objectPrototype->inheritorID();
217
218 d()->functionStructure = JSFunction::createStructure(d()->functionPrototype);
219 d()->callbackFunctionStructure = JSCallbackFunction::createStructure(d()->functionPrototype);
220 d()->argumentsStructure = Arguments::createStructure(d()->objectPrototype);
221 d()->callbackConstructorStructure = JSCallbackConstructor::createStructure(d()->objectPrototype);
222 d()->callbackObjectStructure = JSCallbackObject<JSObject>::createStructure(d()->objectPrototype);
223
224 d()->arrayPrototype = new (exec) ArrayPrototype(ArrayPrototype::createStructure(d()->objectPrototype));
225 d()->arrayStructure = JSArray::createStructure(d()->arrayPrototype);
226 d()->regExpMatchesArrayStructure = RegExpMatchesArray::createStructure(d()->arrayPrototype);
227
228 d()->stringPrototype = new (exec) StringPrototype(exec, StringPrototype::createStructure(d()->objectPrototype));
229 d()->stringObjectStructure = StringObject::createStructure(d()->stringPrototype);
230
231 d()->booleanPrototype = new (exec) BooleanPrototype(exec, BooleanPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
232 d()->booleanObjectStructure = BooleanObject::createStructure(d()->booleanPrototype);
233
234 d()->numberPrototype = new (exec) NumberPrototype(exec, NumberPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
235 d()->numberObjectStructure = NumberObject::createStructure(d()->numberPrototype);
236
237 d()->datePrototype = new (exec) DatePrototype(exec, DatePrototype::createStructure(d()->objectPrototype));
238 d()->dateStructure = DateInstance::createStructure(d()->datePrototype);
239
240 d()->regExpPrototype = new (exec) RegExpPrototype(exec, RegExpPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
241 d()->regExpStructure = RegExpObject::createStructure(d()->regExpPrototype);
242
243 d()->methodCallDummy = constructEmptyObject(exec);
244
245 ErrorPrototype* errorPrototype = new (exec) ErrorPrototype(exec, ErrorPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
246 d()->errorStructure = ErrorInstance::createStructure(errorPrototype);
247
248 RefPtr<Structure> nativeErrorPrototypeStructure = NativeErrorPrototype::createStructure(errorPrototype);
249
250 NativeErrorPrototype* evalErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "EvalError", "EvalError");
251 NativeErrorPrototype* rangeErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "RangeError", "RangeError");
252 NativeErrorPrototype* referenceErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "ReferenceError", "ReferenceError");
253 NativeErrorPrototype* syntaxErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "SyntaxError", "SyntaxError");
254 NativeErrorPrototype* typeErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "TypeError", "TypeError");
255 NativeErrorPrototype* URIErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "URIError", "URIError");
256
257 // Constructors
258
259 JSCell* objectConstructor = new (exec) ObjectConstructor(exec, ObjectConstructor::createStructure(d()->functionPrototype), d()->objectPrototype, d()->prototypeFunctionStructure.get());
260 JSCell* functionConstructor = new (exec) FunctionConstructor(exec, FunctionConstructor::createStructure(d()->functionPrototype), d()->functionPrototype);
261 JSCell* arrayConstructor = new (exec) ArrayConstructor(exec, ArrayConstructor::createStructure(d()->functionPrototype), d()->arrayPrototype);
262 JSCell* stringConstructor = new (exec) StringConstructor(exec, StringConstructor::createStructure(d()->functionPrototype), d()->prototypeFunctionStructure.get(), d()->stringPrototype);
263 JSCell* booleanConstructor = new (exec) BooleanConstructor(exec, BooleanConstructor::createStructure(d()->functionPrototype), d()->booleanPrototype);
264 JSCell* numberConstructor = new (exec) NumberConstructor(exec, NumberConstructor::createStructure(d()->functionPrototype), d()->numberPrototype);
265 JSCell* dateConstructor = new (exec) DateConstructor(exec, DateConstructor::createStructure(d()->functionPrototype), d()->prototypeFunctionStructure.get(), d()->datePrototype);
266
267 d()->regExpConstructor = new (exec) RegExpConstructor(exec, RegExpConstructor::createStructure(d()->functionPrototype), d()->regExpPrototype);
268
269 d()->errorConstructor = new (exec) ErrorConstructor(exec, ErrorConstructor::createStructure(d()->functionPrototype), errorPrototype);
270
271 RefPtr<Structure> nativeErrorStructure = NativeErrorConstructor::createStructure(d()->functionPrototype);
272
273 d()->evalErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, evalErrorPrototype);
274 d()->rangeErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, rangeErrorPrototype);
275 d()->referenceErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, referenceErrorPrototype);
276 d()->syntaxErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, syntaxErrorPrototype);
277 d()->typeErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, typeErrorPrototype);
278 d()->URIErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, URIErrorPrototype);
279
280 d()->objectPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, objectConstructor, DontEnum);
281 d()->functionPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, functionConstructor, DontEnum);
282 d()->arrayPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, arrayConstructor, DontEnum);
283 d()->booleanPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, booleanConstructor, DontEnum);
284 d()->stringPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, stringConstructor, DontEnum);
285 d()->numberPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, numberConstructor, DontEnum);
286 d()->datePrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, dateConstructor, DontEnum);
287 d()->regExpPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, d()->regExpConstructor, DontEnum);
288 errorPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, d()->errorConstructor, DontEnum);
289
290 evalErrorPrototype->putDirect(exec->propertyNames().constructor, d()->evalErrorConstructor, DontEnum);
291 rangeErrorPrototype->putDirect(exec->propertyNames().constructor, d()->rangeErrorConstructor, DontEnum);
292 referenceErrorPrototype->putDirect(exec->propertyNames().constructor, d()->referenceErrorConstructor, DontEnum);
293 syntaxErrorPrototype->putDirect(exec->propertyNames().constructor, d()->syntaxErrorConstructor, DontEnum);
294 typeErrorPrototype->putDirect(exec->propertyNames().constructor, d()->typeErrorConstructor, DontEnum);
295 URIErrorPrototype->putDirect(exec->propertyNames().constructor, d()->URIErrorConstructor, DontEnum);
296
297 // Set global constructors
298
299 // FIXME: These properties could be handled by a static hash table.
300
301 putDirectFunctionWithoutTransition(Identifier(exec, "Object"), objectConstructor, DontEnum);
302 putDirectFunctionWithoutTransition(Identifier(exec, "Function"), functionConstructor, DontEnum);
303 putDirectFunctionWithoutTransition(Identifier(exec, "Array"), arrayConstructor, DontEnum);
304 putDirectFunctionWithoutTransition(Identifier(exec, "Boolean"), booleanConstructor, DontEnum);
305 putDirectFunctionWithoutTransition(Identifier(exec, "String"), stringConstructor, DontEnum);
306 putDirectFunctionWithoutTransition(Identifier(exec, "Number"), numberConstructor, DontEnum);
307 putDirectFunctionWithoutTransition(Identifier(exec, "Date"), dateConstructor, DontEnum);
308 putDirectFunctionWithoutTransition(Identifier(exec, "RegExp"), d()->regExpConstructor, DontEnum);
309 putDirectFunctionWithoutTransition(Identifier(exec, "Error"), d()->errorConstructor, DontEnum);
310 putDirectFunctionWithoutTransition(Identifier(exec, "EvalError"), d()->evalErrorConstructor);
311 putDirectFunctionWithoutTransition(Identifier(exec, "RangeError"), d()->rangeErrorConstructor);
312 putDirectFunctionWithoutTransition(Identifier(exec, "ReferenceError"), d()->referenceErrorConstructor);
313 putDirectFunctionWithoutTransition(Identifier(exec, "SyntaxError"), d()->syntaxErrorConstructor);
314 putDirectFunctionWithoutTransition(Identifier(exec, "TypeError"), d()->typeErrorConstructor);
315 putDirectFunctionWithoutTransition(Identifier(exec, "URIError"), d()->URIErrorConstructor);
316
317 // Set global values.
318 GlobalPropertyInfo staticGlobals[] = {
319 GlobalPropertyInfo(Identifier(exec, "Math"), new (exec) MathObject(exec, MathObject::createStructure(d()->objectPrototype)), DontEnum | DontDelete),
320 GlobalPropertyInfo(Identifier(exec, "NaN"), jsNaN(exec), DontEnum | DontDelete),
321 GlobalPropertyInfo(Identifier(exec, "Infinity"), jsNumber(exec, Inf), DontEnum | DontDelete),
322 GlobalPropertyInfo(Identifier(exec, "undefined"), jsUndefined(), DontEnum | DontDelete),
323 GlobalPropertyInfo(Identifier(exec, "JSON"), new (exec) JSONObject(JSONObject::createStructure(d()->objectPrototype)), DontEnum | DontDelete)
324 };
325
326 addStaticGlobals(staticGlobals, sizeof(staticGlobals) / sizeof(GlobalPropertyInfo));
327
328 // Set global functions.
329
330 d()->evalFunction = new (exec) GlobalEvalFunction(exec, GlobalEvalFunction::createStructure(d()->functionPrototype), 1, exec->propertyNames().eval, globalFuncEval, this);
331 putDirectFunctionWithoutTransition(exec, d()->evalFunction, DontEnum);
332 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 2, Identifier(exec, "parseInt"), globalFuncParseInt), DontEnum);
333 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "parseFloat"), globalFuncParseFloat), DontEnum);
334 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "isNaN"), globalFuncIsNaN), DontEnum);
335 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "isFinite"), globalFuncIsFinite), DontEnum);
336 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "escape"), globalFuncEscape), DontEnum);
337 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "unescape"), globalFuncUnescape), DontEnum);
338 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "decodeURI"), globalFuncDecodeURI), DontEnum);
339 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "decodeURIComponent"), globalFuncDecodeURIComponent), DontEnum);
340 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "encodeURI"), globalFuncEncodeURI), DontEnum);
341 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "encodeURIComponent"), globalFuncEncodeURIComponent), DontEnum);
342 #ifndef NDEBUG
343 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "jscprint"), globalFuncJSCPrint), DontEnum);
344 #endif
345
346 resetPrototype(prototype);
347 }
348
349 // Set prototype, and also insert the object prototype at the end of the chain.
resetPrototype(JSValue prototype)350 void JSGlobalObject::resetPrototype(JSValue prototype)
351 {
352 setPrototype(prototype);
353
354 JSObject* oldLastInPrototypeChain = lastInPrototypeChain(this);
355 JSObject* objectPrototype = d()->objectPrototype;
356 if (oldLastInPrototypeChain != objectPrototype)
357 oldLastInPrototypeChain->setPrototype(objectPrototype);
358 }
359
markChildren(MarkStack & markStack)360 void JSGlobalObject::markChildren(MarkStack& markStack)
361 {
362 JSVariableObject::markChildren(markStack);
363
364 HashSet<ProgramCodeBlock*>::const_iterator end = codeBlocks().end();
365 for (HashSet<ProgramCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
366 (*it)->markAggregate(markStack);
367
368 RegisterFile& registerFile = globalData()->interpreter->registerFile();
369 if (registerFile.globalObject() == this)
370 registerFile.markGlobals(markStack, &globalData()->heap);
371
372 markIfNeeded(markStack, d()->regExpConstructor);
373 markIfNeeded(markStack, d()->errorConstructor);
374 markIfNeeded(markStack, d()->evalErrorConstructor);
375 markIfNeeded(markStack, d()->rangeErrorConstructor);
376 markIfNeeded(markStack, d()->referenceErrorConstructor);
377 markIfNeeded(markStack, d()->syntaxErrorConstructor);
378 markIfNeeded(markStack, d()->typeErrorConstructor);
379 markIfNeeded(markStack, d()->URIErrorConstructor);
380
381 markIfNeeded(markStack, d()->evalFunction);
382 markIfNeeded(markStack, d()->callFunction);
383 markIfNeeded(markStack, d()->applyFunction);
384
385 markIfNeeded(markStack, d()->objectPrototype);
386 markIfNeeded(markStack, d()->functionPrototype);
387 markIfNeeded(markStack, d()->arrayPrototype);
388 markIfNeeded(markStack, d()->booleanPrototype);
389 markIfNeeded(markStack, d()->stringPrototype);
390 markIfNeeded(markStack, d()->numberPrototype);
391 markIfNeeded(markStack, d()->datePrototype);
392 markIfNeeded(markStack, d()->regExpPrototype);
393
394 markIfNeeded(markStack, d()->methodCallDummy);
395
396 markIfNeeded(markStack, d()->errorStructure);
397
398 // No need to mark the other structures, because their prototypes are all
399 // guaranteed to be referenced elsewhere.
400
401 Register* registerArray = d()->registerArray.get();
402 if (!registerArray)
403 return;
404
405 size_t size = d()->registerArraySize;
406 markStack.appendValues(reinterpret_cast<JSValue*>(registerArray), size);
407 }
408
globalExec()409 ExecState* JSGlobalObject::globalExec()
410 {
411 return CallFrame::create(d()->globalCallFrame + RegisterFile::CallFrameHeaderSize);
412 }
413
isDynamicScope() const414 bool JSGlobalObject::isDynamicScope() const
415 {
416 return true;
417 }
418
copyGlobalsFrom(RegisterFile & registerFile)419 void JSGlobalObject::copyGlobalsFrom(RegisterFile& registerFile)
420 {
421 ASSERT(!d()->registerArray);
422 ASSERT(!d()->registerArraySize);
423
424 int numGlobals = registerFile.numGlobals();
425 if (!numGlobals) {
426 d()->registers = 0;
427 return;
428 }
429
430 Register* registerArray = copyRegisterArray(registerFile.lastGlobal(), numGlobals);
431 setRegisters(registerArray + numGlobals, registerArray, numGlobals);
432 }
433
copyGlobalsTo(RegisterFile & registerFile)434 void JSGlobalObject::copyGlobalsTo(RegisterFile& registerFile)
435 {
436 JSGlobalObject* lastGlobalObject = registerFile.globalObject();
437 if (lastGlobalObject && lastGlobalObject != this)
438 lastGlobalObject->copyGlobalsFrom(registerFile);
439
440 registerFile.setGlobalObject(this);
441 registerFile.setNumGlobals(symbolTable().size());
442
443 if (d()->registerArray) {
444 memcpy(registerFile.start() - d()->registerArraySize, d()->registerArray.get(), d()->registerArraySize * sizeof(Register));
445 setRegisters(registerFile.start(), 0, 0);
446 }
447 }
448
operator new(size_t size,JSGlobalData * globalData)449 void* JSGlobalObject::operator new(size_t size, JSGlobalData* globalData)
450 {
451 #ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
452 return globalData->heap.inlineAllocate(size);
453 #else
454 return globalData->heap.allocate(size);
455 #endif
456 }
457
458 } // namespace JSC
459