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
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
#include <mutex>
#include <new>
#define JEMALLOC_CPP_CPP_
#ifdef __cplusplus
extern "C" {
#endif
#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/jemalloc_internal_includes.h"
#ifdef __cplusplus
}
#endif
// All operators in this file are exported.
// Possibly alias hidden versions of malloc and sdallocx to avoid an extra plt
// thunk?
//
// extern __typeof (sdallocx) sdallocx_int
// __attribute ((alias ("sdallocx"),
// visibility ("hidden")));
//
// ... but it needs to work with jemalloc namespaces.
void *operator new(std::size_t size);
void *operator new[](std::size_t size);
void *operator new(std::size_t size, const std::nothrow_t &) noexcept;
void *operator new[](std::size_t size, const std::nothrow_t &) noexcept;
void operator delete(void *ptr) noexcept;
void operator delete[](void *ptr) noexcept;
void operator delete(void *ptr, const std::nothrow_t &) noexcept;
void operator delete[](void *ptr, const std::nothrow_t &) noexcept;
#if __cpp_sized_deallocation >= 201309
/* C++14's sized-delete operators. */
void operator delete(void *ptr, std::size_t size) noexcept;
void operator delete[](void *ptr, std::size_t size) noexcept;
#endif
#if __cpp_aligned_new >= 201606
/* C++17's over-aligned operators. */
void *operator new(std::size_t size, std::align_val_t);
void *operator new(std::size_t size, std::align_val_t, const std::nothrow_t &) noexcept;
void *operator new[](std::size_t size, std::align_val_t);
void *operator new[](std::size_t size, std::align_val_t, const std::nothrow_t &) noexcept;
void operator delete(void* ptr, std::align_val_t) noexcept;
void operator delete(void* ptr, std::align_val_t, const std::nothrow_t &) noexcept;
void operator delete(void* ptr, std::size_t size, std::align_val_t al) noexcept;
void operator delete[](void* ptr, std::align_val_t) noexcept;
void operator delete[](void* ptr, std::align_val_t, const std::nothrow_t &) noexcept;
void operator delete[](void* ptr, std::size_t size, std::align_val_t al) noexcept;
#endif
JEMALLOC_NOINLINE
static void *
handleOOM(std::size_t size, bool nothrow) {
if (opt_experimental_infallible_new) {
safety_check_fail("<jemalloc>: Allocation failed and "
"opt.experimental_infallible_new is true. Aborting.\n");
return nullptr;
}
void *ptr = nullptr;
while (ptr == nullptr) {
std::new_handler handler;
// GCC-4.8 and clang 4.0 do not have std::get_new_handler.
{
static std::mutex mtx;
std::lock_guard<std::mutex> lock(mtx);
handler = std::set_new_handler(nullptr);
std::set_new_handler(handler);
}
if (handler == nullptr)
break;
try {
handler();
} catch (const std::bad_alloc &) {
break;
}
ptr = je_malloc(size);
}
if (ptr == nullptr && !nothrow)
std::__throw_bad_alloc();
return ptr;
}
template <bool IsNoExcept>
JEMALLOC_NOINLINE
static void *
fallback_impl(std::size_t size) noexcept(IsNoExcept) {
void *ptr = malloc_default(size);
if (likely(ptr != nullptr)) {
return ptr;
}
return handleOOM(size, IsNoExcept);
}
template <bool IsNoExcept>
JEMALLOC_ALWAYS_INLINE
void *
newImpl(std::size_t size) noexcept(IsNoExcept) {
return imalloc_fastpath(size, &fallback_impl<IsNoExcept>);
}
void *
operator new(std::size_t size) {
return newImpl<false>(size);
}
void *
operator new[](std::size_t size) {
return newImpl<false>(size);
}
void *
operator new(std::size_t size, const std::nothrow_t &) noexcept {
return newImpl<true>(size);
}
void *
operator new[](std::size_t size, const std::nothrow_t &) noexcept {
return newImpl<true>(size);
}
#if __cpp_aligned_new >= 201606
template <bool IsNoExcept>
JEMALLOC_ALWAYS_INLINE
void *
alignedNewImpl(std::size_t size, std::align_val_t alignment) noexcept(IsNoExcept) {
void *ptr = je_aligned_alloc(static_cast<std::size_t>(alignment), size);
if (likely(ptr != nullptr)) {
return ptr;
}
return handleOOM(size, IsNoExcept);
}
void *
operator new(std::size_t size, std::align_val_t alignment) {
return alignedNewImpl<false>(size, alignment);
}
void *
operator new[](std::size_t size, std::align_val_t alignment) {
return alignedNewImpl<false>(size, alignment);
}
void *
operator new(std::size_t size, std::align_val_t alignment, const std::nothrow_t &) noexcept {
return alignedNewImpl<true>(size, alignment);
}
void *
operator new[](std::size_t size, std::align_val_t alignment, const std::nothrow_t &) noexcept {
return alignedNewImpl<true>(size, alignment);
}
#endif // __cpp_aligned_new
void
operator delete(void *ptr) noexcept {
je_free(ptr);
}
void
operator delete[](void *ptr) noexcept {
je_free(ptr);
}
void
operator delete(void *ptr, const std::nothrow_t &) noexcept {
je_free(ptr);
}
void operator delete[](void *ptr, const std::nothrow_t &) noexcept {
je_free(ptr);
}
#if __cpp_sized_deallocation >= 201309
JEMALLOC_ALWAYS_INLINE
void
sizedDeleteImpl(void* ptr, std::size_t size) noexcept {
if (unlikely(ptr == nullptr)) {
return;
}
je_sdallocx_noflags(ptr, size);
}
void
operator delete(void *ptr, std::size_t size) noexcept {
sizedDeleteImpl(ptr, size);
}
void
operator delete[](void *ptr, std::size_t size) noexcept {
sizedDeleteImpl(ptr, size);
}
#endif // __cpp_sized_deallocation
#if __cpp_aligned_new >= 201606
JEMALLOC_ALWAYS_INLINE
void
alignedSizedDeleteImpl(void* ptr, std::size_t size, std::align_val_t alignment) noexcept {
if (config_debug) {
assert(((size_t)alignment & ((size_t)alignment - 1)) == 0);
}
if (unlikely(ptr == nullptr)) {
return;
}
je_sdallocx(ptr, size, MALLOCX_ALIGN(alignment));
}
void
operator delete(void* ptr, std::align_val_t) noexcept {
je_free(ptr);
}
void
operator delete[](void* ptr, std::align_val_t) noexcept {
je_free(ptr);
}
void
operator delete(void* ptr, std::align_val_t, const std::nothrow_t&) noexcept {
je_free(ptr);
}
void
operator delete[](void* ptr, std::align_val_t, const std::nothrow_t&) noexcept {
je_free(ptr);
}
void
operator delete(void* ptr, std::size_t size, std::align_val_t alignment) noexcept {
alignedSizedDeleteImpl(ptr, size, alignment);
}
void
operator delete[](void* ptr, std::size_t size, std::align_val_t alignment) noexcept {
alignedSizedDeleteImpl(ptr, size, alignment);
}
#endif // __cpp_aligned_new
|
