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
|
//===--------------------------- new.cpp ----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <stdlib.h>
#include "new"
#if __APPLE__
#include <cxxabi.h>
#ifndef _LIBCPPABI_VERSION
// On Darwin, there are two STL shared libraries and a lower level ABI
// shared libray. The global holding the current new handler is
// in the ABI library and named __cxa_new_handler.
#define __new_handler __cxxabiapple::__cxa_new_handler
#endif
#else // __APPLE__
static std::new_handler __new_handler;
#endif
// Implement all new and delete operators as weak definitions
// in this shared library, so that they can be overriden by programs
// that define non-weak copies of the functions.
__attribute__((__weak__, __visibility__("default")))
void *
operator new(std::size_t size)
#if !__has_feature(cxx_noexcept)
throw(std::bad_alloc)
#endif
{
if (size == 0)
size = 1;
void* p;
while ((p = ::malloc(size)) == 0)
{
// If malloc fails and there is a new_handler,
// call it to try free up memory.
std::new_handler nh = std::get_new_handler();
if (nh)
nh();
else
#ifndef _LIBCPP_NO_EXCEPTIONS
throw std::bad_alloc();
#else
break;
#endif
}
return p;
}
__attribute__((__weak__, __visibility__("default")))
void*
operator new(size_t size, const std::nothrow_t&) _NOEXCEPT
{
void* p = 0;
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
p = ::operator new(size);
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
}
#endif // _LIBCPP_NO_EXCEPTIONS
return p;
}
__attribute__((__weak__, __visibility__("default")))
void*
operator new[](size_t size)
#if !__has_feature(cxx_noexcept)
throw(std::bad_alloc)
#endif
{
return ::operator new(size);
}
__attribute__((__weak__, __visibility__("default")))
void*
operator new[](size_t size, const std::nothrow_t&) _NOEXCEPT
{
void* p = 0;
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
p = ::operator new[](size);
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
}
#endif // _LIBCPP_NO_EXCEPTIONS
return p;
}
__attribute__((__weak__, __visibility__("default")))
void
operator delete(void* ptr) _NOEXCEPT
{
if (ptr)
::free(ptr);
}
__attribute__((__weak__, __visibility__("default")))
void
operator delete(void* ptr, const std::nothrow_t&) _NOEXCEPT
{
::operator delete(ptr);
}
__attribute__((__weak__, __visibility__("default")))
void
operator delete[] (void* ptr) _NOEXCEPT
{
::operator delete (ptr);
}
__attribute__((__weak__, __visibility__("default")))
void
operator delete[] (void* ptr, const std::nothrow_t&) _NOEXCEPT
{
::operator delete[](ptr);
}
namespace std
{
const nothrow_t nothrow = {};
#ifndef _LIBCPPABI_VERSION
new_handler
set_new_handler(new_handler handler) _NOEXCEPT
{
return __sync_lock_test_and_set(&__new_handler, handler);
}
new_handler
get_new_handler() _NOEXCEPT
{
return __sync_fetch_and_add(&__new_handler, (new_handler)0);
}
#ifndef LIBCXXRT
bad_alloc::bad_alloc() _NOEXCEPT
{
}
bad_alloc::~bad_alloc() _NOEXCEPT
{
}
const char*
bad_alloc::what() const _NOEXCEPT
{
return "std::bad_alloc";
}
#endif //LIBCXXRT
bad_array_new_length::bad_array_new_length() _NOEXCEPT
{
}
bad_array_new_length::~bad_array_new_length() _NOEXCEPT
{
}
const char*
bad_array_new_length::what() const _NOEXCEPT
{
return "bad_array_new_length";
}
#endif
void
__throw_bad_alloc()
{
#ifndef _LIBCPP_NO_EXCEPTIONS
throw bad_alloc();
#endif
}
} // std
|
