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
|
/*
* Copyright (C) 2008 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.
*/
#include "config.h"
#include "StructureStubInfo.h"
#include "JSObject.h"
#include "PolymorphicPutByIdList.h"
#include "ScopeChain.h"
namespace JSC {
#if ENABLE(JIT)
void StructureStubInfo::deref()
{
switch (accessType) {
case access_get_by_id_self_list: {
PolymorphicAccessStructureList* polymorphicStructures = u.getByIdSelfList.structureList;
delete polymorphicStructures;
return;
}
case access_get_by_id_proto_list: {
PolymorphicAccessStructureList* polymorphicStructures = u.getByIdProtoList.structureList;
delete polymorphicStructures;
return;
}
case access_put_by_id_list:
delete u.putByIdList.list;
return;
case access_get_by_id_self:
case access_get_by_id_proto:
case access_get_by_id_chain:
case access_put_by_id_transition_normal:
case access_put_by_id_transition_direct:
case access_put_by_id_replace:
case access_unset:
case access_get_by_id_generic:
case access_put_by_id_generic:
case access_get_array_length:
case access_get_string_length:
// These instructions don't have to release any allocated memory
return;
default:
ASSERT_NOT_REACHED();
}
}
bool StructureStubInfo::visitWeakReferences()
{
switch (accessType) {
case access_get_by_id_self:
if (!Heap::isMarked(u.getByIdSelf.baseObjectStructure.get()))
return false;
break;
case access_get_by_id_proto:
if (!Heap::isMarked(u.getByIdProto.baseObjectStructure.get())
|| !Heap::isMarked(u.getByIdProto.prototypeStructure.get()))
return false;
break;
case access_get_by_id_chain:
if (!Heap::isMarked(u.getByIdChain.baseObjectStructure.get())
|| !Heap::isMarked(u.getByIdChain.chain.get()))
return false;
break;
case access_get_by_id_self_list: {
PolymorphicAccessStructureList* polymorphicStructures = u.getByIdSelfList.structureList;
if (!polymorphicStructures->visitWeak(u.getByIdSelfList.listSize))
return false;
break;
}
case access_get_by_id_proto_list: {
PolymorphicAccessStructureList* polymorphicStructures = u.getByIdProtoList.structureList;
if (!polymorphicStructures->visitWeak(u.getByIdProtoList.listSize))
return false;
break;
}
case access_put_by_id_transition_normal:
case access_put_by_id_transition_direct:
if (!Heap::isMarked(u.putByIdTransition.previousStructure.get())
|| !Heap::isMarked(u.putByIdTransition.structure.get())
|| !Heap::isMarked(u.putByIdTransition.chain.get()))
return false;
break;
case access_put_by_id_replace:
if (!Heap::isMarked(u.putByIdReplace.baseObjectStructure.get()))
return false;
break;
case access_put_by_id_list:
if (!u.putByIdList.list->visitWeak())
return false;
break;
default:
// The rest of the instructions don't require references, so there is no need to
// do anything.
break;
}
return true;
}
#endif
} // namespace JSC
|
