1 #define JEMALLOC_TSD_C_
2 #include "jemalloc/internal/jemalloc_internal.h"
3
4 /******************************************************************************/
5 /* Data. */
6
7 static unsigned ncleanups;
8 static malloc_tsd_cleanup_t cleanups[MALLOC_TSD_CLEANUPS_MAX];
9
10 malloc_tsd_data(, , tsd_t, TSD_INITIALIZER)
11
12 /******************************************************************************/
13
14 void *
malloc_tsd_malloc(size_t size)15 malloc_tsd_malloc(size_t size)
16 {
17
18 return (a0malloc(CACHELINE_CEILING(size)));
19 }
20
21 void
malloc_tsd_dalloc(void * wrapper)22 malloc_tsd_dalloc(void *wrapper)
23 {
24
25 a0dalloc(wrapper);
26 }
27
28 void
malloc_tsd_no_cleanup(void * arg)29 malloc_tsd_no_cleanup(void *arg)
30 {
31
32 not_reached();
33 }
34
35 #if defined(JEMALLOC_MALLOC_THREAD_CLEANUP) || defined(_WIN32)
36 #ifndef _WIN32
37 JEMALLOC_EXPORT
38 #endif
39 void
_malloc_thread_cleanup(void)40 _malloc_thread_cleanup(void)
41 {
42 bool pending[MALLOC_TSD_CLEANUPS_MAX], again;
43 unsigned i;
44
45 for (i = 0; i < ncleanups; i++)
46 pending[i] = true;
47
48 do {
49 again = false;
50 for (i = 0; i < ncleanups; i++) {
51 if (pending[i]) {
52 pending[i] = cleanups[i]();
53 if (pending[i])
54 again = true;
55 }
56 }
57 } while (again);
58 }
59 #endif
60
61 void
malloc_tsd_cleanup_register(bool (* f)(void))62 malloc_tsd_cleanup_register(bool (*f)(void))
63 {
64
65 assert(ncleanups < MALLOC_TSD_CLEANUPS_MAX);
66 cleanups[ncleanups] = f;
67 ncleanups++;
68 }
69
70 void
tsd_cleanup(void * arg)71 tsd_cleanup(void *arg)
72 {
73 tsd_t *tsd = (tsd_t *)arg;
74
75 switch (tsd->state) {
76 case tsd_state_uninitialized:
77 /* Do nothing. */
78 break;
79 case tsd_state_nominal:
80 #define O(n, t) \
81 n##_cleanup(tsd);
82 MALLOC_TSD
83 #undef O
84 tsd->state = tsd_state_purgatory;
85 tsd_set(tsd);
86 break;
87 case tsd_state_purgatory:
88 /*
89 * The previous time this destructor was called, we set the
90 * state to tsd_state_purgatory so that other destructors
91 * wouldn't cause re-creation of the tsd. This time, do
92 * nothing, and do not request another callback.
93 */
94 break;
95 case tsd_state_reincarnated:
96 /*
97 * Another destructor deallocated memory after this destructor
98 * was called. Reset state to tsd_state_purgatory and request
99 * another callback.
100 */
101 tsd->state = tsd_state_purgatory;
102 tsd_set(tsd);
103 break;
104 default:
105 not_reached();
106 }
107 }
108
109 bool
malloc_tsd_boot0(void)110 malloc_tsd_boot0(void)
111 {
112
113 ncleanups = 0;
114 if (tsd_boot0())
115 return (true);
116 *tsd_arenas_tdata_bypassp_get(tsd_fetch()) = true;
117 return (false);
118 }
119
120 void
malloc_tsd_boot1(void)121 malloc_tsd_boot1(void)
122 {
123
124 tsd_boot1();
125 *tsd_arenas_tdata_bypassp_get(tsd_fetch()) = false;
126 }
127
128 #ifdef _WIN32
129 static BOOL WINAPI
_tls_callback(HINSTANCE hinstDLL,DWORD fdwReason,LPVOID lpvReserved)130 _tls_callback(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
131 {
132
133 switch (fdwReason) {
134 #ifdef JEMALLOC_LAZY_LOCK
135 case DLL_THREAD_ATTACH:
136 isthreaded = true;
137 break;
138 #endif
139 case DLL_THREAD_DETACH:
140 _malloc_thread_cleanup();
141 break;
142 default:
143 break;
144 }
145 return (true);
146 }
147
148 #ifdef _MSC_VER
149 # ifdef _M_IX86
150 # pragma comment(linker, "/INCLUDE:__tls_used")
151 # pragma comment(linker, "/INCLUDE:_tls_callback")
152 # else
153 # pragma comment(linker, "/INCLUDE:_tls_used")
154 # pragma comment(linker, "/INCLUDE:tls_callback")
155 # endif
156 # pragma section(".CRT$XLY",long,read)
157 #endif
158 JEMALLOC_SECTION(".CRT$XLY") JEMALLOC_ATTR(used)
159 BOOL (WINAPI *const tls_callback)(HINSTANCE hinstDLL,
160 DWORD fdwReason, LPVOID lpvReserved) = _tls_callback;
161 #endif
162
163 #if (!defined(JEMALLOC_MALLOC_THREAD_CLEANUP) && !defined(JEMALLOC_TLS) && \
164 !defined(_WIN32))
165 void *
tsd_init_check_recursion(tsd_init_head_t * head,tsd_init_block_t * block)166 tsd_init_check_recursion(tsd_init_head_t *head, tsd_init_block_t *block)
167 {
168 pthread_t self = pthread_self();
169 tsd_init_block_t *iter;
170
171 /* Check whether this thread has already inserted into the list. */
172 malloc_mutex_lock(&head->lock);
173 ql_foreach(iter, &head->blocks, link) {
174 if (iter->thread == self) {
175 malloc_mutex_unlock(&head->lock);
176 return (iter->data);
177 }
178 }
179 /* Insert block into list. */
180 ql_elm_new(block, link);
181 block->thread = self;
182 ql_tail_insert(&head->blocks, block, link);
183 malloc_mutex_unlock(&head->lock);
184 return (NULL);
185 }
186
187 void
tsd_init_finish(tsd_init_head_t * head,tsd_init_block_t * block)188 tsd_init_finish(tsd_init_head_t *head, tsd_init_block_t *block)
189 {
190
191 malloc_mutex_lock(&head->lock);
192 ql_remove(&head->blocks, block, link);
193 malloc_mutex_unlock(&head->lock);
194 }
195 #endif
196