1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef GenericArgumentsInlines_h
#define GenericArgumentsInlines_h
#include "GenericArguments.h"
#include "JSCInlines.h"
namespace JSC {
template<typename Type>
bool GenericArguments<Type>::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName ident, PropertySlot& slot)
{
Type* thisObject = jsCast<Type*>(object);
VM& vm = exec->vm();
if (!thisObject->overrodeThings()) {
if (ident == vm.propertyNames->length) {
slot.setValue(thisObject, DontEnum, jsNumber(thisObject->internalLength()));
return true;
}
if (ident == vm.propertyNames->callee) {
slot.setValue(thisObject, DontEnum, thisObject->callee().get());
return true;
}
if (ident == vm.propertyNames->iteratorSymbol) {
slot.setValue(thisObject, DontEnum, thisObject->globalObject()->arrayProtoValuesFunction());
return true;
}
}
Optional<uint32_t> index = parseIndex(ident);
if (index && thisObject->canAccessIndexQuickly(index.value())) {
slot.setValue(thisObject, None, thisObject->getIndexQuickly(index.value()));
return true;
}
return Base::getOwnPropertySlot(thisObject, exec, ident, slot);
}
template<typename Type>
bool GenericArguments<Type>::getOwnPropertySlotByIndex(JSObject* object, ExecState* exec, unsigned index, PropertySlot& slot)
{
Type* thisObject = jsCast<Type*>(object);
if (thisObject->canAccessIndexQuickly(index)) {
slot.setValue(thisObject, None, thisObject->getIndexQuickly(index));
return true;
}
return Base::getOwnPropertySlotByIndex(object, exec, index, slot);
}
template<typename Type>
void GenericArguments<Type>::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& array, EnumerationMode mode)
{
Type* thisObject = jsCast<Type*>(object);
if (array.includeStringProperties()) {
for (unsigned i = 0; i < thisObject->internalLength(); ++i) {
if (!thisObject->canAccessIndexQuickly(i))
continue;
array.add(Identifier::from(exec, i));
}
}
if (mode.includeDontEnumProperties() && !thisObject->overrodeThings()) {
array.add(exec->propertyNames().length);
array.add(exec->propertyNames().callee);
if (array.includeSymbolProperties())
array.add(exec->propertyNames().iteratorSymbol);
}
Base::getOwnPropertyNames(thisObject, exec, array, mode);
}
template<typename Type>
void GenericArguments<Type>::put(JSCell* cell, ExecState* exec, PropertyName ident, JSValue value, PutPropertySlot& slot)
{
Type* thisObject = jsCast<Type*>(cell);
VM& vm = exec->vm();
if (!thisObject->overrodeThings()
&& (ident == vm.propertyNames->length
|| ident == vm.propertyNames->callee
|| ident == vm.propertyNames->iteratorSymbol)) {
thisObject->overrideThings(vm);
PutPropertySlot dummy = slot; // This put is not cacheable, so we shadow the slot that was given to us.
Base::put(thisObject, exec, ident, value, dummy);
return;
}
Optional<uint32_t> index = parseIndex(ident);
if (index && thisObject->canAccessIndexQuickly(index.value())) {
thisObject->setIndexQuickly(vm, index.value(), value);
return;
}
Base::put(thisObject, exec, ident, value, slot);
}
template<typename Type>
void GenericArguments<Type>::putByIndex(JSCell* cell, ExecState* exec, unsigned index, JSValue value, bool shouldThrow)
{
Type* thisObject = jsCast<Type*>(cell);
VM& vm = exec->vm();
if (thisObject->canAccessIndexQuickly(index)) {
thisObject->setIndexQuickly(vm, index, value);
return;
}
return Base::putByIndex(cell, exec, index, value, shouldThrow);
}
template<typename Type>
bool GenericArguments<Type>::deleteProperty(JSCell* cell, ExecState* exec, PropertyName ident)
{
Type* thisObject = jsCast<Type*>(cell);
VM& vm = exec->vm();
if (!thisObject->overrodeThings()
&& (ident == vm.propertyNames->length
|| ident == vm.propertyNames->callee
|| ident == vm.propertyNames->iteratorSymbol))
thisObject->overrideThings(vm);
Optional<uint32_t> index = parseIndex(ident);
if (index && thisObject->canAccessIndexQuickly(index.value())) {
thisObject->overrideArgument(vm, index.value());
return true;
}
return Base::deleteProperty(thisObject, exec, ident);
}
template<typename Type>
bool GenericArguments<Type>::deletePropertyByIndex(JSCell* cell, ExecState* exec, unsigned index)
{
Type* thisObject = jsCast<Type*>(cell);
VM& vm = exec->vm();
if (thisObject->canAccessIndexQuickly(index)) {
thisObject->overrideArgument(vm, index);
return true;
}
return Base::deletePropertyByIndex(cell, exec, index);
}
template<typename Type>
bool GenericArguments<Type>::defineOwnProperty(JSObject* object, ExecState* exec, PropertyName ident, const PropertyDescriptor& descriptor, bool shouldThrow)
{
Type* thisObject = jsCast<Type*>(object);
VM& vm = exec->vm();
if (ident == vm.propertyNames->length
|| ident == vm.propertyNames->callee
|| ident == vm.propertyNames->iteratorSymbol)
thisObject->overrideThingsIfNecessary(vm);
else {
Optional<uint32_t> optionalIndex = parseIndex(ident);
if (optionalIndex && thisObject->canAccessIndexQuickly(optionalIndex.value())) {
uint32_t index = optionalIndex.value();
if (!descriptor.isAccessorDescriptor()) {
// If the property is not deleted and we are using a non-accessor descriptor, then
// make sure that the aliased argument sees the value.
if (descriptor.value())
thisObject->setIndexQuickly(vm, index, descriptor.value());
// If the property is not deleted and we are using a non-accessor, writable
// descriptor, then we are done. The argument continues to be aliased. Note that we
// ignore the request to change enumerability. We appear to have always done so, in
// cases where the argument was still aliased.
// FIXME: https://bugs.webkit.org/show_bug.cgi?id=141952
if (descriptor.writable())
return true;
}
// If the property is a non-deleted argument, then move it into the base object and
// then delete it.
JSValue value = thisObject->getIndexQuickly(index);
ASSERT(value);
object->putDirectMayBeIndex(exec, ident, value);
thisObject->overrideArgument(vm, index);
}
}
// Now just let the normal object machinery do its thing.
return Base::defineOwnProperty(object, exec, ident, descriptor, shouldThrow);
}
template<typename Type>
void GenericArguments<Type>::copyToArguments(ExecState* exec, VirtualRegister firstElementDest, unsigned offset, unsigned length)
{
Type* thisObject = static_cast<Type*>(this);
for (unsigned i = 0; i < length; ++i) {
if (thisObject->canAccessIndexQuickly(i + offset))
exec->r(firstElementDest + i) = thisObject->getIndexQuickly(i + offset);
else {
exec->r(firstElementDest + i) = get(exec, i + offset);
if (UNLIKELY(exec->vm().exception()))
return;
}
}
}
} // namespace JSC
#endif // GenericArgumentsInlines_h
|
