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
|
/*
* Copyright (C) 2009-2021 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 "ParserArena.h"
#include "CatchScope.h"
#include "JSBigInt.h"
#include "JSCInlines.h"
#include "Nodes.h"
#include "VMTrapsInlines.h"
#include <wtf/text/MakeString.h>
namespace JSC {
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(IdentifierArena);
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(ParserArena);
ParserArena::ParserArena()
: m_freeableMemory(nullptr)
, m_freeablePoolEnd(nullptr)
{
}
inline void* ParserArena::freeablePool()
{
ASSERT(m_freeablePoolEnd);
return m_freeablePoolEnd - freeablePoolSize;
}
inline void ParserArena::deallocateObjects()
{
size_t size = m_deletableObjects.size();
for (size_t i = 0; i < size; ++i)
m_deletableObjects[i]->~ParserArenaDeletable();
if (m_freeablePoolEnd)
ParserArenaMalloc::free(freeablePool());
size = m_freeablePools.size();
for (size_t i = 0; i < size; ++i)
ParserArenaMalloc::free(m_freeablePools[i]);
}
ParserArena::~ParserArena()
{
deallocateObjects();
}
void ParserArena::allocateFreeablePool()
{
if (m_freeablePoolEnd)
m_freeablePools.append(freeablePool());
char* pool = static_cast<char*>(ParserArenaMalloc::malloc(freeablePoolSize));
m_freeableMemory = pool;
m_freeablePoolEnd = pool + freeablePoolSize;
ASSERT(freeablePool() == pool);
}
const Identifier* IdentifierArena::makeBigIntDecimalIdentifier(VM& vm, const Identifier& identifier, uint8_t radix)
{
if (radix == 10)
return &identifier;
DeferTermination deferScope(vm);
auto scope = DECLARE_CATCH_SCOPE(vm);
JSValue bigInt = JSBigInt::parseInt(nullptr, vm, identifier.string(), radix, JSBigInt::ErrorParseMode::ThrowExceptions, JSBigInt::ParseIntSign::Unsigned);
scope.assertNoException();
if (bigInt.isEmpty()) {
// Handle out-of-memory or other failures by returning null, since
// we don't have a global object to throw exceptions to in this scope.
return nullptr;
}
// FIXME: We are allocating a JSBigInt just to be able to use
// JSBigInt::tryGetString when radix is not 10.
// This creates some GC pressure, but since these identifiers
// will only be created when BigInt literal is used as a property name,
// it wont be much problematic, given such cases are very rare.
// There is a lot of optimizations we can apply here when necessary.
// https://bugs.webkit.org/show_bug.cgi?id=207627
JSBigInt* heapBigInt;
#if USE(BIGINT32)
if (bigInt.isBigInt32()) {
heapBigInt = JSBigInt::tryCreateFrom(vm, bigInt.bigInt32AsInt32());
RELEASE_ASSERT(heapBigInt);
} else
#endif
heapBigInt = bigInt.asHeapBigInt();
m_identifiers.append(Identifier::fromString(vm, JSBigInt::tryGetString(vm, heapBigInt, 10)));
return &m_identifiers.last();
}
const Identifier& IdentifierArena::makePrivateIdentifier(VM& vm, ASCIILiteral prefix, unsigned identifier)
{
auto symbolName = makeString(prefix, identifier);
auto symbol = vm.privateSymbolRegistry().symbolForKey(symbolName);
m_identifiers.append(Identifier::fromUid(symbol));
return m_identifiers.last();
}
}
|
