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 "JSGlobalObjectFunctions.h"
51 #include "JSLock.h"
52 #include "Interpreter.h"
53 #include "MathObject.h"
54 #include "NativeErrorConstructor.h"
55 #include "NativeErrorPrototype.h"
56 #include "NumberConstructor.h"
57 #include "NumberPrototype.h"
58 #include "ObjectConstructor.h"
59 #include "ObjectPrototype.h"
60 #include "Profiler.h"
61 #include "PrototypeFunction.h"
62 #include "RegExpConstructor.h"
63 #include "RegExpMatchesArray.h"
64 #include "RegExpObject.h"
65 #include "RegExpPrototype.h"
66 #include "ScopeChainMark.h"
67 #include "StringConstructor.h"
68 #include "StringPrototype.h"
69 #include "Debugger.h"
70
71 namespace JSC {
72
73 ASSERT_CLASS_FITS_IN_CELL(JSGlobalObject);
74
75 // Default number of ticks before a timeout check should be done.
76 static const int initialTickCountThreshold = 255;
77
78 // Preferred number of milliseconds between each timeout check
79 static const int preferredScriptCheckTimeInterval = 1000;
80
markIfNeeded(JSValuePtr v)81 static inline void markIfNeeded(JSValuePtr v)
82 {
83 if (v && !v.marked())
84 v.mark();
85 }
86
markIfNeeded(const RefPtr<Structure> & s)87 static inline void markIfNeeded(const RefPtr<Structure>& s)
88 {
89 if (s)
90 s->mark();
91 }
92
~JSGlobalObject()93 JSGlobalObject::~JSGlobalObject()
94 {
95 ASSERT(JSLock::currentThreadIsHoldingLock());
96
97 if (d()->debugger)
98 d()->debugger->detach(this);
99
100 Profiler** profiler = Profiler::enabledProfilerReference();
101 if (UNLIKELY(*profiler != 0)) {
102 (*profiler)->stopProfiling(globalExec(), UString());
103 }
104
105 d()->next->d()->prev = d()->prev;
106 d()->prev->d()->next = d()->next;
107 JSGlobalObject*& headObject = head();
108 if (headObject == this)
109 headObject = d()->next;
110 if (headObject == this)
111 headObject = 0;
112
113 HashSet<ProgramCodeBlock*>::const_iterator end = codeBlocks().end();
114 for (HashSet<ProgramCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
115 (*it)->clearGlobalObject();
116
117 RegisterFile& registerFile = globalData()->interpreter->registerFile();
118 if (registerFile.globalObject() == this) {
119 registerFile.setGlobalObject(0);
120 registerFile.setNumGlobals(0);
121 }
122 delete d();
123 }
124
init(JSObject * thisValue)125 void JSGlobalObject::init(JSObject* thisValue)
126 {
127 ASSERT(JSLock::currentThreadIsHoldingLock());
128
129 d()->globalData = Heap::heap(this)->globalData();
130 d()->globalScopeChain = ScopeChain(this, d()->globalData.get(), thisValue);
131
132 JSGlobalObject::globalExec()->init(0, 0, d()->globalScopeChain.node(), CallFrame::noCaller(), 0, 0, 0);
133
134 if (JSGlobalObject*& headObject = head()) {
135 d()->prev = headObject;
136 d()->next = headObject->d()->next;
137 headObject->d()->next->d()->prev = this;
138 headObject->d()->next = this;
139 } else
140 headObject = d()->next = d()->prev = this;
141
142 d()->recursion = 0;
143 d()->debugger = 0;
144
145 d()->profileGroup = 0;
146
147 reset(prototype());
148 }
149
put(ExecState * exec,const Identifier & propertyName,JSValuePtr value,PutPropertySlot & slot)150 void JSGlobalObject::put(ExecState* exec, const Identifier& propertyName, JSValuePtr value, PutPropertySlot& slot)
151 {
152 ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
153
154 if (symbolTablePut(propertyName, value))
155 return;
156 JSVariableObject::put(exec, propertyName, value, slot);
157 }
158
putWithAttributes(ExecState * exec,const Identifier & propertyName,JSValuePtr value,unsigned attributes)159 void JSGlobalObject::putWithAttributes(ExecState* exec, const Identifier& propertyName, JSValuePtr value, unsigned attributes)
160 {
161 ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
162
163 if (symbolTablePutWithAttributes(propertyName, value, attributes))
164 return;
165
166 JSValuePtr valueBefore = getDirect(propertyName);
167 PutPropertySlot slot;
168 JSVariableObject::put(exec, propertyName, value, slot);
169 if (!valueBefore) {
170 JSValuePtr valueAfter = getDirect(propertyName);
171 if (valueAfter)
172 putDirect(propertyName, valueAfter, attributes);
173 }
174 }
175
defineGetter(ExecState * exec,const Identifier & propertyName,JSObject * getterFunc)176 void JSGlobalObject::defineGetter(ExecState* exec, const Identifier& propertyName, JSObject* getterFunc)
177 {
178 PropertySlot slot;
179 if (!symbolTableGet(propertyName, slot))
180 JSVariableObject::defineGetter(exec, propertyName, getterFunc);
181 }
182
defineSetter(ExecState * exec,const Identifier & propertyName,JSObject * setterFunc)183 void JSGlobalObject::defineSetter(ExecState* exec, const Identifier& propertyName, JSObject* setterFunc)
184 {
185 PropertySlot slot;
186 if (!symbolTableGet(propertyName, slot))
187 JSVariableObject::defineSetter(exec, propertyName, setterFunc);
188 }
189
lastInPrototypeChain(JSObject * object)190 static inline JSObject* lastInPrototypeChain(JSObject* object)
191 {
192 JSObject* o = object;
193 while (o->prototype().isObject())
194 o = asObject(o->prototype());
195 return o;
196 }
197
reset(JSValuePtr prototype)198 void JSGlobalObject::reset(JSValuePtr prototype)
199 {
200 ExecState* exec = JSGlobalObject::globalExec();
201
202 // Prototypes
203
204 d()->functionPrototype = new (exec) FunctionPrototype(exec, FunctionPrototype::createStructure(jsNull())); // The real prototype will be set once ObjectPrototype is created.
205 d()->prototypeFunctionStructure = PrototypeFunction::createStructure(d()->functionPrototype);
206 d()->functionPrototype->addFunctionProperties(exec, d()->prototypeFunctionStructure.get());
207 d()->objectPrototype = new (exec) ObjectPrototype(exec, ObjectPrototype::createStructure(jsNull()), d()->prototypeFunctionStructure.get());
208 d()->functionPrototype->structure()->setPrototypeWithoutTransition(d()->objectPrototype);
209
210 d()->emptyObjectStructure = d()->objectPrototype->inheritorID();
211
212 d()->functionStructure = JSFunction::createStructure(d()->functionPrototype);
213 d()->callbackFunctionStructure = JSCallbackFunction::createStructure(d()->functionPrototype);
214 d()->argumentsStructure = Arguments::createStructure(d()->objectPrototype);
215 d()->callbackConstructorStructure = JSCallbackConstructor::createStructure(d()->objectPrototype);
216 d()->callbackObjectStructure = JSCallbackObject<JSObject>::createStructure(d()->objectPrototype);
217
218 d()->arrayPrototype = new (exec) ArrayPrototype(ArrayPrototype::createStructure(d()->objectPrototype));
219 d()->arrayStructure = JSArray::createStructure(d()->arrayPrototype);
220 d()->regExpMatchesArrayStructure = RegExpMatchesArray::createStructure(d()->arrayPrototype);
221
222 d()->stringPrototype = new (exec) StringPrototype(exec, StringPrototype::createStructure(d()->objectPrototype));
223 d()->stringObjectStructure = StringObject::createStructure(d()->stringPrototype);
224
225 d()->booleanPrototype = new (exec) BooleanPrototype(exec, BooleanPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
226 d()->booleanObjectStructure = BooleanObject::createStructure(d()->booleanPrototype);
227
228 d()->numberPrototype = new (exec) NumberPrototype(exec, NumberPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
229 d()->numberObjectStructure = NumberObject::createStructure(d()->numberPrototype);
230
231 d()->datePrototype = new (exec) DatePrototype(exec, DatePrototype::createStructure(d()->objectPrototype));
232 d()->dateStructure = DateInstance::createStructure(d()->datePrototype);
233
234 d()->regExpPrototype = new (exec) RegExpPrototype(exec, RegExpPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
235 d()->regExpStructure = RegExpObject::createStructure(d()->regExpPrototype);
236
237 ErrorPrototype* errorPrototype = new (exec) ErrorPrototype(exec, ErrorPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
238 d()->errorStructure = ErrorInstance::createStructure(errorPrototype);
239
240 RefPtr<Structure> nativeErrorPrototypeStructure = NativeErrorPrototype::createStructure(errorPrototype);
241
242 NativeErrorPrototype* evalErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "EvalError", "EvalError");
243 NativeErrorPrototype* rangeErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "RangeError", "RangeError");
244 NativeErrorPrototype* referenceErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "ReferenceError", "ReferenceError");
245 NativeErrorPrototype* syntaxErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "SyntaxError", "SyntaxError");
246 NativeErrorPrototype* typeErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "TypeError", "TypeError");
247 NativeErrorPrototype* URIErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "URIError", "URIError");
248
249 // Constructors
250
251 JSValuePtr objectConstructor = new (exec) ObjectConstructor(exec, ObjectConstructor::createStructure(d()->functionPrototype), d()->objectPrototype);
252 JSValuePtr functionConstructor = new (exec) FunctionConstructor(exec, FunctionConstructor::createStructure(d()->functionPrototype), d()->functionPrototype);
253 JSValuePtr arrayConstructor = new (exec) ArrayConstructor(exec, ArrayConstructor::createStructure(d()->functionPrototype), d()->arrayPrototype);
254 JSValuePtr stringConstructor = new (exec) StringConstructor(exec, StringConstructor::createStructure(d()->functionPrototype), d()->prototypeFunctionStructure.get(), d()->stringPrototype);
255 JSValuePtr booleanConstructor = new (exec) BooleanConstructor(exec, BooleanConstructor::createStructure(d()->functionPrototype), d()->booleanPrototype);
256 JSValuePtr numberConstructor = new (exec) NumberConstructor(exec, NumberConstructor::createStructure(d()->functionPrototype), d()->numberPrototype);
257 JSValuePtr dateConstructor = new (exec) DateConstructor(exec, DateConstructor::createStructure(d()->functionPrototype), d()->prototypeFunctionStructure.get(), d()->datePrototype);
258
259 d()->regExpConstructor = new (exec) RegExpConstructor(exec, RegExpConstructor::createStructure(d()->functionPrototype), d()->regExpPrototype);
260
261 d()->errorConstructor = new (exec) ErrorConstructor(exec, ErrorConstructor::createStructure(d()->functionPrototype), errorPrototype);
262
263 RefPtr<Structure> nativeErrorStructure = NativeErrorConstructor::createStructure(d()->functionPrototype);
264
265 d()->evalErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, evalErrorPrototype);
266 d()->rangeErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, rangeErrorPrototype);
267 d()->referenceErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, referenceErrorPrototype);
268 d()->syntaxErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, syntaxErrorPrototype);
269 d()->typeErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, typeErrorPrototype);
270 d()->URIErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, URIErrorPrototype);
271
272 d()->objectPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, objectConstructor, DontEnum);
273 d()->functionPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, functionConstructor, DontEnum);
274 d()->arrayPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, arrayConstructor, DontEnum);
275 d()->booleanPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, booleanConstructor, DontEnum);
276 d()->stringPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, stringConstructor, DontEnum);
277 d()->numberPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, numberConstructor, DontEnum);
278 d()->datePrototype->putDirectWithoutTransition(exec->propertyNames().constructor, dateConstructor, DontEnum);
279 d()->regExpPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, d()->regExpConstructor, DontEnum);
280 errorPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, d()->errorConstructor, DontEnum);
281
282 evalErrorPrototype->putDirect(exec->propertyNames().constructor, d()->evalErrorConstructor, DontEnum);
283 rangeErrorPrototype->putDirect(exec->propertyNames().constructor, d()->rangeErrorConstructor, DontEnum);
284 referenceErrorPrototype->putDirect(exec->propertyNames().constructor, d()->referenceErrorConstructor, DontEnum);
285 syntaxErrorPrototype->putDirect(exec->propertyNames().constructor, d()->syntaxErrorConstructor, DontEnum);
286 typeErrorPrototype->putDirect(exec->propertyNames().constructor, d()->typeErrorConstructor, DontEnum);
287 URIErrorPrototype->putDirect(exec->propertyNames().constructor, d()->URIErrorConstructor, DontEnum);
288
289 // Set global constructors
290
291 // FIXME: These properties could be handled by a static hash table.
292
293 putDirectWithoutTransition(Identifier(exec, "Object"), objectConstructor, DontEnum);
294 putDirectWithoutTransition(Identifier(exec, "Function"), functionConstructor, DontEnum);
295 putDirectWithoutTransition(Identifier(exec, "Array"), arrayConstructor, DontEnum);
296 putDirectWithoutTransition(Identifier(exec, "Boolean"), booleanConstructor, DontEnum);
297 putDirectWithoutTransition(Identifier(exec, "String"), stringConstructor, DontEnum);
298 putDirectWithoutTransition(Identifier(exec, "Number"), numberConstructor, DontEnum);
299 putDirectWithoutTransition(Identifier(exec, "Date"), dateConstructor, DontEnum);
300 putDirectWithoutTransition(Identifier(exec, "RegExp"), d()->regExpConstructor, DontEnum);
301 putDirectWithoutTransition(Identifier(exec, "Error"), d()->errorConstructor, DontEnum);
302 putDirectWithoutTransition(Identifier(exec, "EvalError"), d()->evalErrorConstructor);
303 putDirectWithoutTransition(Identifier(exec, "RangeError"), d()->rangeErrorConstructor);
304 putDirectWithoutTransition(Identifier(exec, "ReferenceError"), d()->referenceErrorConstructor);
305 putDirectWithoutTransition(Identifier(exec, "SyntaxError"), d()->syntaxErrorConstructor);
306 putDirectWithoutTransition(Identifier(exec, "TypeError"), d()->typeErrorConstructor);
307 putDirectWithoutTransition(Identifier(exec, "URIError"), d()->URIErrorConstructor);
308
309 // Set global values.
310 GlobalPropertyInfo staticGlobals[] = {
311 GlobalPropertyInfo(Identifier(exec, "Math"), new (exec) MathObject(exec, MathObject::createStructure(d()->objectPrototype)), DontEnum | DontDelete),
312 GlobalPropertyInfo(Identifier(exec, "NaN"), jsNaN(exec), DontEnum | DontDelete),
313 GlobalPropertyInfo(Identifier(exec, "Infinity"), jsNumber(exec, Inf), DontEnum | DontDelete),
314 GlobalPropertyInfo(Identifier(exec, "undefined"), jsUndefined(), DontEnum | DontDelete)
315 };
316
317 addStaticGlobals(staticGlobals, sizeof(staticGlobals) / sizeof(GlobalPropertyInfo));
318
319 // Set global functions.
320
321 d()->evalFunction = new (exec) GlobalEvalFunction(exec, GlobalEvalFunction::createStructure(d()->functionPrototype), 1, exec->propertyNames().eval, globalFuncEval, this);
322 putDirectFunctionWithoutTransition(exec, d()->evalFunction, DontEnum);
323 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 2, Identifier(exec, "parseInt"), globalFuncParseInt), DontEnum);
324 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "parseFloat"), globalFuncParseFloat), DontEnum);
325 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "isNaN"), globalFuncIsNaN), DontEnum);
326 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "isFinite"), globalFuncIsFinite), DontEnum);
327 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "escape"), globalFuncEscape), DontEnum);
328 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "unescape"), globalFuncUnescape), DontEnum);
329 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "decodeURI"), globalFuncDecodeURI), DontEnum);
330 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "decodeURIComponent"), globalFuncDecodeURIComponent), DontEnum);
331 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "encodeURI"), globalFuncEncodeURI), DontEnum);
332 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "encodeURIComponent"), globalFuncEncodeURIComponent), DontEnum);
333 #ifndef NDEBUG
334 putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "jscprint"), globalFuncJSCPrint), DontEnum);
335 #endif
336
337 resetPrototype(prototype);
338 }
339
340 // Set prototype, and also insert the object prototype at the end of the chain.
resetPrototype(JSValuePtr prototype)341 void JSGlobalObject::resetPrototype(JSValuePtr prototype)
342 {
343 setPrototype(prototype);
344 lastInPrototypeChain(this)->setPrototype(d()->objectPrototype);
345 }
346
setTimeoutTime(unsigned timeoutTime)347 void JSGlobalObject::setTimeoutTime(unsigned timeoutTime)
348 {
349 globalData()->interpreter->setTimeoutTime(timeoutTime);
350 }
351
startTimeoutCheck()352 void JSGlobalObject::startTimeoutCheck()
353 {
354 globalData()->interpreter->startTimeoutCheck();
355 }
356
stopTimeoutCheck()357 void JSGlobalObject::stopTimeoutCheck()
358 {
359 globalData()->interpreter->stopTimeoutCheck();
360 }
361
mark()362 void JSGlobalObject::mark()
363 {
364 JSVariableObject::mark();
365
366 HashSet<ProgramCodeBlock*>::const_iterator end = codeBlocks().end();
367 for (HashSet<ProgramCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
368 (*it)->mark();
369
370 RegisterFile& registerFile = globalData()->interpreter->registerFile();
371 if (registerFile.globalObject() == this)
372 registerFile.markGlobals(&globalData()->heap);
373
374 markIfNeeded(d()->regExpConstructor);
375 markIfNeeded(d()->errorConstructor);
376 markIfNeeded(d()->evalErrorConstructor);
377 markIfNeeded(d()->rangeErrorConstructor);
378 markIfNeeded(d()->referenceErrorConstructor);
379 markIfNeeded(d()->syntaxErrorConstructor);
380 markIfNeeded(d()->typeErrorConstructor);
381 markIfNeeded(d()->URIErrorConstructor);
382
383 markIfNeeded(d()->evalFunction);
384
385 markIfNeeded(d()->objectPrototype);
386 markIfNeeded(d()->functionPrototype);
387 markIfNeeded(d()->arrayPrototype);
388 markIfNeeded(d()->booleanPrototype);
389 markIfNeeded(d()->stringPrototype);
390 markIfNeeded(d()->numberPrototype);
391 markIfNeeded(d()->datePrototype);
392 markIfNeeded(d()->regExpPrototype);
393
394 markIfNeeded(d()->errorStructure);
395
396 // No need to mark the other structures, because their prototypes are all
397 // guaranteed to be referenced elsewhere.
398
399 Register* registerArray = d()->registerArray.get();
400 if (!registerArray)
401 return;
402
403 size_t size = d()->registerArraySize;
404 for (size_t i = 0; i < size; ++i) {
405 Register& r = registerArray[i];
406 if (!r.marked())
407 r.mark();
408 }
409 }
410
globalExec()411 ExecState* JSGlobalObject::globalExec()
412 {
413 return CallFrame::create(d()->globalCallFrame + RegisterFile::CallFrameHeaderSize);
414 }
415
isDynamicScope() const416 bool JSGlobalObject::isDynamicScope() const
417 {
418 return true;
419 }
420
copyGlobalsFrom(RegisterFile & registerFile)421 void JSGlobalObject::copyGlobalsFrom(RegisterFile& registerFile)
422 {
423 ASSERT(!d()->registerArray);
424 ASSERT(!d()->registerArraySize);
425
426 int numGlobals = registerFile.numGlobals();
427 if (!numGlobals) {
428 d()->registers = 0;
429 return;
430 }
431
432 Register* registerArray = copyRegisterArray(registerFile.lastGlobal(), numGlobals);
433 setRegisters(registerArray + numGlobals, registerArray, numGlobals);
434 }
435
copyGlobalsTo(RegisterFile & registerFile)436 void JSGlobalObject::copyGlobalsTo(RegisterFile& registerFile)
437 {
438 JSGlobalObject* lastGlobalObject = registerFile.globalObject();
439 if (lastGlobalObject && lastGlobalObject != this)
440 lastGlobalObject->copyGlobalsFrom(registerFile);
441
442 registerFile.setGlobalObject(this);
443 registerFile.setNumGlobals(symbolTable().size());
444
445 if (d()->registerArray) {
446 memcpy(registerFile.start() - d()->registerArraySize, d()->registerArray.get(), d()->registerArraySize * sizeof(Register));
447 setRegisters(registerFile.start(), 0, 0);
448 }
449 }
450
operator new(size_t size,JSGlobalData * globalData)451 void* JSGlobalObject::operator new(size_t size, JSGlobalData* globalData)
452 {
453 #ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
454 return globalData->heap.inlineAllocate(size);
455 #else
456 return globalData->heap.allocate(size);
457 #endif
458 }
459
460 } // namespace JSC
461