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
73namespace JSC {
74
75ASSERT_CLASS_FITS_IN_CELL(JSGlobalObject);
76
77// Default number of ticks before a timeout check should be done.
78static const int initialTickCountThreshold = 255;
79
80// Preferred number of milliseconds between each timeout check
81static const int preferredScriptCheckTimeInterval = 1000;
82
83static inline void markIfNeeded(MarkStack& markStack, JSValue v)
84{
85 if (v)
86 markStack.append(value: v);
87}
88
89static inline void markIfNeeded(MarkStack& markStack, const RefPtr<Structure>& s)
90{
91 if (s)
92 markIfNeeded(markStack, v: s->storedPrototype());
93}
94
95JSGlobalObject::~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(), title: 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<GlobalCodeBlock*>::const_iterator end = codeBlocks().end();
116 for (HashSet<GlobalCodeBlock*>::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 d()->destructor(d());
125}
126
127void JSGlobalObject::init(JSObject* thisValue)
128{
129 ASSERT(JSLock::currentThreadIsHoldingLock());
130
131 structure()->disableSpecificFunctionTracking();
132
133 d()->globalData = Heap::heap(c: this)->globalData();
134 d()->globalScopeChain = ScopeChain(this, d()->globalData.get(), this, thisValue);
135
136 JSGlobalObject::globalExec()->init(codeBlock: 0, vPC: 0, scopeChain: d()->globalScopeChain.node(), callerFrame: CallFrame::noCaller(), returnValueRegister: 0, argc: 0, callee: 0);
137
138 if (JSGlobalObject*& headObject = head()) {
139 d()->prev = headObject;
140 d()->next = headObject->d()->next;
141 headObject->d()->next->d()->prev = this;
142 headObject->d()->next = this;
143 } else
144 headObject = d()->next = d()->prev = this;
145
146 d()->recursion = 0;
147 d()->debugger = 0;
148
149 d()->profileGroup = 0;
150
151 reset(prototype: prototype());
152}
153
154void JSGlobalObject::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
155{
156 ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
157
158 if (symbolTablePut(propertyName, value))
159 return;
160 JSVariableObject::put(exec, propertyName, value, slot);
161}
162
163void JSGlobalObject::putWithAttributes(ExecState* exec, const Identifier& propertyName, JSValue value, unsigned attributes)
164{
165 ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
166
167 if (symbolTablePutWithAttributes(propertyName, value, attributes))
168 return;
169
170 JSValue valueBefore = getDirect(propertyName);
171 PutPropertySlot slot;
172 JSVariableObject::put(exec, propertyName, value, slot);
173 if (!valueBefore) {
174 JSValue valueAfter = getDirect(propertyName);
175 if (valueAfter)
176 JSObject::putWithAttributes(exec, propertyName, value: valueAfter, attributes);
177 }
178}
179
180void JSGlobalObject::defineGetter(ExecState* exec, const Identifier& propertyName, JSObject* getterFunc, unsigned attributes)
181{
182 PropertySlot slot;
183 if (!symbolTableGet(propertyName, slot))
184 JSVariableObject::defineGetter(exec, propertyName, getterFunction: getterFunc, attributes);
185}
186
187void JSGlobalObject::defineSetter(ExecState* exec, const Identifier& propertyName, JSObject* setterFunc, unsigned attributes)
188{
189 PropertySlot slot;
190 if (!symbolTableGet(propertyName, slot))
191 JSVariableObject::defineSetter(exec, propertyName, setterFunction: setterFunc, attributes);
192}
193
194static inline JSObject* lastInPrototypeChain(JSObject* object)
195{
196 JSObject* o = object;
197 while (o->prototype().isObject())
198 o = asObject(value: o->prototype());
199 return o;
200}
201
202void JSGlobalObject::reset(JSValue prototype)
203{
204 ExecState* exec = JSGlobalObject::globalExec();
205
206 // Prototypes
207
208 d()->functionPrototype = new (exec) FunctionPrototype(exec, FunctionPrototype::createStructure(proto: jsNull())); // The real prototype will be set once ObjectPrototype is created.
209 d()->prototypeFunctionStructure = PrototypeFunction::createStructure(proto: d()->functionPrototype);
210 NativeFunctionWrapper* callFunction = 0;
211 NativeFunctionWrapper* applyFunction = 0;
212 d()->functionPrototype->addFunctionProperties(exec, prototypeFunctionStructure: d()->prototypeFunctionStructure.get(), callFunction: &callFunction, applyFunction: &applyFunction);
213 d()->callFunction = callFunction;
214 d()->applyFunction = applyFunction;
215 d()->objectPrototype = new (exec) ObjectPrototype(exec, ObjectPrototype::createStructure(prototype: jsNull()), d()->prototypeFunctionStructure.get());
216 d()->functionPrototype->structure()->setPrototypeWithoutTransition(d()->objectPrototype);
217
218 d()->emptyObjectStructure = d()->objectPrototype->inheritorID();
219
220 d()->functionStructure = JSFunction::createStructure(prototype: d()->functionPrototype);
221 d()->callbackFunctionStructure = JSCallbackFunction::createStructure(proto: d()->functionPrototype);
222 d()->argumentsStructure = Arguments::createStructure(prototype: d()->objectPrototype);
223 d()->callbackConstructorStructure = JSCallbackConstructor::createStructure(proto: d()->objectPrototype);
224 d()->callbackObjectStructure = JSCallbackObject<JSObject>::createStructure(proto: d()->objectPrototype);
225
226 d()->arrayPrototype = new (exec) ArrayPrototype(ArrayPrototype::createStructure(prototype: d()->objectPrototype));
227 d()->arrayStructure = JSArray::createStructure(prototype: d()->arrayPrototype);
228 d()->regExpMatchesArrayStructure = RegExpMatchesArray::createStructure(prototype: d()->arrayPrototype);
229
230 d()->stringPrototype = new (exec) StringPrototype(exec, StringPrototype::createStructure(prototype: d()->objectPrototype));
231 d()->stringObjectStructure = StringObject::createStructure(prototype: d()->stringPrototype);
232
233 d()->booleanPrototype = new (exec) BooleanPrototype(exec, BooleanPrototype::createStructure(prototype: d()->objectPrototype), d()->prototypeFunctionStructure.get());
234 d()->booleanObjectStructure = BooleanObject::createStructure(prototype: d()->booleanPrototype);
235
236 d()->numberPrototype = new (exec) NumberPrototype(exec, NumberPrototype::createStructure(prototype: d()->objectPrototype), d()->prototypeFunctionStructure.get());
237 d()->numberObjectStructure = NumberObject::createStructure(prototype: d()->numberPrototype);
238
239 d()->datePrototype = new (exec) DatePrototype(exec, DatePrototype::createStructure(prototype: d()->objectPrototype));
240 d()->dateStructure = DateInstance::createStructure(prototype: d()->datePrototype);
241
242 d()->regExpPrototype = new (exec) RegExpPrototype(exec, RegExpPrototype::createStructure(prototype: d()->objectPrototype), d()->prototypeFunctionStructure.get());
243 d()->regExpStructure = RegExpObject::createStructure(prototype: d()->regExpPrototype);
244
245 d()->methodCallDummy = constructEmptyObject(exec);
246
247 ErrorPrototype* errorPrototype = new (exec) ErrorPrototype(exec, ErrorPrototype::createStructure(prototype: d()->objectPrototype), d()->prototypeFunctionStructure.get());
248 d()->errorStructure = ErrorInstance::createStructure(prototype: errorPrototype);
249
250 RefPtr<Structure> nativeErrorPrototypeStructure = NativeErrorPrototype::createStructure(prototype: errorPrototype);
251
252 NativeErrorPrototype* evalErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "EvalError", "EvalError");
253 NativeErrorPrototype* rangeErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "RangeError", "RangeError");
254 NativeErrorPrototype* referenceErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "ReferenceError", "ReferenceError");
255 NativeErrorPrototype* syntaxErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "SyntaxError", "SyntaxError");
256 NativeErrorPrototype* typeErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "TypeError", "TypeError");
257 NativeErrorPrototype* URIErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "URIError", "URIError");
258
259 // Constructors
260
261 JSCell* objectConstructor = new (exec) ObjectConstructor(exec, ObjectConstructor::createStructure(proto: d()->functionPrototype), d()->objectPrototype, d()->prototypeFunctionStructure.get());
262 JSCell* functionConstructor = new (exec) FunctionConstructor(exec, FunctionConstructor::createStructure(proto: d()->functionPrototype), d()->functionPrototype);
263 JSCell* arrayConstructor = new (exec) ArrayConstructor(exec, ArrayConstructor::createStructure(proto: d()->functionPrototype), d()->arrayPrototype, d()->prototypeFunctionStructure.get());
264 JSCell* stringConstructor = new (exec) StringConstructor(exec, StringConstructor::createStructure(proto: d()->functionPrototype), d()->prototypeFunctionStructure.get(), d()->stringPrototype);
265 JSCell* booleanConstructor = new (exec) BooleanConstructor(exec, BooleanConstructor::createStructure(proto: d()->functionPrototype), d()->booleanPrototype);
266 JSCell* numberConstructor = new (exec) NumberConstructor(exec, NumberConstructor::createStructure(proto: d()->functionPrototype), d()->numberPrototype);
267 JSCell* dateConstructor = new (exec) DateConstructor(exec, DateConstructor::createStructure(proto: d()->functionPrototype), d()->prototypeFunctionStructure.get(), d()->datePrototype);
268
269 d()->regExpConstructor = new (exec) RegExpConstructor(exec, RegExpConstructor::createStructure(prototype: d()->functionPrototype), d()->regExpPrototype);
270
271 d()->errorConstructor = new (exec) ErrorConstructor(exec, ErrorConstructor::createStructure(proto: d()->functionPrototype), errorPrototype);
272
273 RefPtr<Structure> nativeErrorStructure = NativeErrorConstructor::createStructure(proto: d()->functionPrototype);
274
275 d()->evalErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, evalErrorPrototype);
276 d()->rangeErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, rangeErrorPrototype);
277 d()->referenceErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, referenceErrorPrototype);
278 d()->syntaxErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, syntaxErrorPrototype);
279 d()->typeErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, typeErrorPrototype);
280 d()->URIErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, URIErrorPrototype);
281
282 d()->objectPrototype->putDirectFunctionWithoutTransition(propertyName: exec->propertyNames().constructor, value: objectConstructor, attributes: DontEnum);
283 d()->functionPrototype->putDirectFunctionWithoutTransition(propertyName: exec->propertyNames().constructor, value: functionConstructor, attributes: DontEnum);
284 d()->arrayPrototype->putDirectFunctionWithoutTransition(propertyName: exec->propertyNames().constructor, value: arrayConstructor, attributes: DontEnum);
285 d()->booleanPrototype->putDirectFunctionWithoutTransition(propertyName: exec->propertyNames().constructor, value: booleanConstructor, attributes: DontEnum);
286 d()->stringPrototype->putDirectFunctionWithoutTransition(propertyName: exec->propertyNames().constructor, value: stringConstructor, attributes: DontEnum);
287 d()->numberPrototype->putDirectFunctionWithoutTransition(propertyName: exec->propertyNames().constructor, value: numberConstructor, attributes: DontEnum);
288 d()->datePrototype->putDirectFunctionWithoutTransition(propertyName: exec->propertyNames().constructor, value: dateConstructor, attributes: DontEnum);
289 d()->regExpPrototype->putDirectFunctionWithoutTransition(propertyName: exec->propertyNames().constructor, value: d()->regExpConstructor, attributes: DontEnum);
290 errorPrototype->putDirectFunctionWithoutTransition(propertyName: exec->propertyNames().constructor, value: d()->errorConstructor, attributes: DontEnum);
291
292 evalErrorPrototype->putDirect(propertyName: exec->propertyNames().constructor, value: d()->evalErrorConstructor, attributes: DontEnum);
293 rangeErrorPrototype->putDirect(propertyName: exec->propertyNames().constructor, value: d()->rangeErrorConstructor, attributes: DontEnum);
294 referenceErrorPrototype->putDirect(propertyName: exec->propertyNames().constructor, value: d()->referenceErrorConstructor, attributes: DontEnum);
295 syntaxErrorPrototype->putDirect(propertyName: exec->propertyNames().constructor, value: d()->syntaxErrorConstructor, attributes: DontEnum);
296 typeErrorPrototype->putDirect(propertyName: exec->propertyNames().constructor, value: d()->typeErrorConstructor, attributes: DontEnum);
297 URIErrorPrototype->putDirect(propertyName: exec->propertyNames().constructor, value: d()->URIErrorConstructor, attributes: DontEnum);
298
299 // Set global constructors
300
301 // FIXME: These properties could be handled by a static hash table.
302
303 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "Object"), value: objectConstructor, attributes: DontEnum);
304 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "Function"), value: functionConstructor, attributes: DontEnum);
305 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "Array"), value: arrayConstructor, attributes: DontEnum);
306 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "Boolean"), value: booleanConstructor, attributes: DontEnum);
307 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "String"), value: stringConstructor, attributes: DontEnum);
308 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "Number"), value: numberConstructor, attributes: DontEnum);
309 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "Date"), value: dateConstructor, attributes: DontEnum);
310 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "RegExp"), value: d()->regExpConstructor, attributes: DontEnum);
311 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "Error"), value: d()->errorConstructor, attributes: DontEnum);
312 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "EvalError"), value: d()->evalErrorConstructor, attributes: DontEnum);
313 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "RangeError"), value: d()->rangeErrorConstructor, attributes: DontEnum);
314 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "ReferenceError"), value: d()->referenceErrorConstructor, attributes: DontEnum);
315 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "SyntaxError"), value: d()->syntaxErrorConstructor, attributes: DontEnum);
316 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "TypeError"), value: d()->typeErrorConstructor, attributes: DontEnum);
317 putDirectFunctionWithoutTransition(propertyName: Identifier(exec, "URIError"), value: d()->URIErrorConstructor, attributes: DontEnum);
318
319 // Set global values.
320 GlobalPropertyInfo staticGlobals[] = {
321 GlobalPropertyInfo(Identifier(exec, "Math"), new (exec) MathObject(exec, MathObject::createStructure(prototype: d()->objectPrototype)), DontEnum | DontDelete),
322 GlobalPropertyInfo(Identifier(exec, "NaN"), jsNaN(exec), DontEnum | DontDelete),
323 GlobalPropertyInfo(Identifier(exec, "Infinity"), jsNumber(exec, d: Inf), DontEnum | DontDelete),
324 GlobalPropertyInfo(Identifier(exec, "undefined"), jsUndefined(), DontEnum | DontDelete),
325 GlobalPropertyInfo(Identifier(exec, "JSON"), new (exec) JSONObject(JSONObject::createStructure(prototype: d()->objectPrototype)), DontEnum | DontDelete)
326 };
327
328 addStaticGlobals(globals: staticGlobals, count: sizeof(staticGlobals) / sizeof(GlobalPropertyInfo));
329
330 // Set global functions.
331
332 d()->evalFunction = new (exec) GlobalEvalFunction(exec, GlobalEvalFunction::createStructure(prototype: d()->functionPrototype), 1, exec->propertyNames().eval, globalFuncEval, this);
333 putDirectFunctionWithoutTransition(exec, function: d()->evalFunction, attr: DontEnum);
334 putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 2, Identifier(exec, "parseInt"), globalFuncParseInt), attr: DontEnum);
335 putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "parseFloat"), globalFuncParseFloat), attr: DontEnum);
336 putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "isNaN"), globalFuncIsNaN), attr: DontEnum);
337 putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "isFinite"), globalFuncIsFinite), attr: DontEnum);
338 putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "escape"), globalFuncEscape), attr: DontEnum);
339 putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "unescape"), globalFuncUnescape), attr: DontEnum);
340 putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "decodeURI"), globalFuncDecodeURI), attr: DontEnum);
341 putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "decodeURIComponent"), globalFuncDecodeURIComponent), attr: DontEnum);
342 putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "encodeURI"), globalFuncEncodeURI), attr: DontEnum);
343 putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "encodeURIComponent"), globalFuncEncodeURIComponent), attr: DontEnum);
344#ifndef NDEBUG
345#ifndef QT_BUILD_SCRIPT_LIB
346 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "jscprint"), globalFuncJSCPrint), DontEnum);
347#endif
348#endif
349
350 resetPrototype(prototype);
351}
352
353// Set prototype, and also insert the object prototype at the end of the chain.
354void JSGlobalObject::resetPrototype(JSValue prototype)
355{
356 setPrototype(prototype);
357
358 JSObject* oldLastInPrototypeChain = lastInPrototypeChain(object: this);
359 JSObject* objectPrototype = d()->objectPrototype;
360 if (oldLastInPrototypeChain != objectPrototype)
361 oldLastInPrototypeChain->setPrototype(objectPrototype);
362}
363
364void JSGlobalObject::markChildren(MarkStack& markStack)
365{
366 JSVariableObject::markChildren(markStack);
367
368 HashSet<GlobalCodeBlock*>::const_iterator end = codeBlocks().end();
369 for (HashSet<GlobalCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
370 (*it)->markAggregate(markStack);
371
372 RegisterFile& registerFile = globalData()->interpreter->registerFile();
373 if (registerFile.globalObject() == this)
374 registerFile.markGlobals(markStack, heap: &globalData()->heap);
375
376 markIfNeeded(markStack, v: d()->regExpConstructor);
377 markIfNeeded(markStack, v: d()->errorConstructor);
378 markIfNeeded(markStack, v: d()->evalErrorConstructor);
379 markIfNeeded(markStack, v: d()->rangeErrorConstructor);
380 markIfNeeded(markStack, v: d()->referenceErrorConstructor);
381 markIfNeeded(markStack, v: d()->syntaxErrorConstructor);
382 markIfNeeded(markStack, v: d()->typeErrorConstructor);
383 markIfNeeded(markStack, v: d()->URIErrorConstructor);
384
385 markIfNeeded(markStack, v: d()->evalFunction);
386 markIfNeeded(markStack, v: d()->callFunction);
387 markIfNeeded(markStack, v: d()->applyFunction);
388
389 markIfNeeded(markStack, v: d()->objectPrototype);
390 markIfNeeded(markStack, v: d()->functionPrototype);
391 markIfNeeded(markStack, v: d()->arrayPrototype);
392 markIfNeeded(markStack, v: d()->booleanPrototype);
393 markIfNeeded(markStack, v: d()->stringPrototype);
394 markIfNeeded(markStack, v: d()->numberPrototype);
395 markIfNeeded(markStack, v: d()->datePrototype);
396 markIfNeeded(markStack, v: d()->regExpPrototype);
397
398 markIfNeeded(markStack, v: d()->methodCallDummy);
399
400 markIfNeeded(markStack, s: d()->errorStructure);
401 markIfNeeded(markStack, s: d()->argumentsStructure);
402 markIfNeeded(markStack, s: d()->arrayStructure);
403 markIfNeeded(markStack, s: d()->booleanObjectStructure);
404 markIfNeeded(markStack, s: d()->callbackConstructorStructure);
405 markIfNeeded(markStack, s: d()->callbackFunctionStructure);
406 markIfNeeded(markStack, s: d()->callbackObjectStructure);
407 markIfNeeded(markStack, s: d()->dateStructure);
408 markIfNeeded(markStack, s: d()->emptyObjectStructure);
409 markIfNeeded(markStack, s: d()->errorStructure);
410 markIfNeeded(markStack, s: d()->functionStructure);
411 markIfNeeded(markStack, s: d()->numberObjectStructure);
412 markIfNeeded(markStack, s: d()->prototypeFunctionStructure);
413 markIfNeeded(markStack, s: d()->regExpMatchesArrayStructure);
414 markIfNeeded(markStack, s: d()->regExpStructure);
415 markIfNeeded(markStack, s: d()->stringObjectStructure);
416
417 // No need to mark the other structures, because their prototypes are all
418 // guaranteed to be referenced elsewhere.
419
420 Register* registerArray = d()->registerArray.get();
421 if (!registerArray)
422 return;
423
424 size_t size = d()->registerArraySize;
425 markStack.appendValues(values: reinterpret_cast<JSValue*>(registerArray), count: size);
426}
427
428ExecState* JSGlobalObject::globalExec()
429{
430 return CallFrame::create(callFrameBase: d()->globalCallFrame + RegisterFile::CallFrameHeaderSize);
431}
432
433bool JSGlobalObject::isDynamicScope() const
434{
435 return true;
436}
437
438void JSGlobalObject::copyGlobalsFrom(RegisterFile& registerFile)
439{
440 ASSERT(!d()->registerArray);
441 ASSERT(!d()->registerArraySize);
442
443 int numGlobals = registerFile.numGlobals();
444 if (!numGlobals) {
445 d()->registers = 0;
446 return;
447 }
448
449 Register* registerArray = copyRegisterArray(src: registerFile.lastGlobal(), count: numGlobals);
450 setRegisters(registers: registerArray + numGlobals, registerArray, count: numGlobals);
451}
452
453void JSGlobalObject::copyGlobalsTo(RegisterFile& registerFile)
454{
455 JSGlobalObject* lastGlobalObject = registerFile.globalObject();
456 if (lastGlobalObject && lastGlobalObject != this)
457 lastGlobalObject->copyGlobalsFrom(registerFile);
458
459 registerFile.setGlobalObject(this);
460 registerFile.setNumGlobals(symbolTable().size());
461
462 if (d()->registerArray) {
463 memcpy(dest: registerFile.start() - d()->registerArraySize, src: d()->registerArray.get(), n: d()->registerArraySize * sizeof(Register));
464 setRegisters(registers: registerFile.start(), registerArray: 0, count: 0);
465 }
466}
467
468void* JSGlobalObject::operator new(size_t size, JSGlobalData* globalData)
469{
470 return globalData->heap.allocate(size);
471}
472
473void JSGlobalObject::destroyJSGlobalObjectData(void* jsGlobalObjectData)
474{
475 delete static_cast<JSGlobalObjectData*>(jsGlobalObjectData);
476}
477
478} // namespace JSC
479

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObject.cpp