Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 1 | #include "pthread_impl.h" |
Rich Felker | dba68bf | 2011-07-30 08:02:14 -0400 | [diff] [blame] | 2 | #include "stdio_impl.h" |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 3 | |
Rich Felker | b2486a8 | 2011-04-06 20:27:07 -0400 | [diff] [blame] | 4 | static void dummy_0() |
| 5 | { |
| 6 | } |
Rich Felker | acb0480 | 2011-07-29 22:59:44 -0400 | [diff] [blame] | 7 | weak_alias(dummy_0, __synccall_lock); |
| 8 | weak_alias(dummy_0, __synccall_unlock); |
Rich Felker | a6054e3 | 2011-04-19 23:09:14 -0400 | [diff] [blame] | 9 | weak_alias(dummy_0, __pthread_tsd_run_dtors); |
Rich Felker | fd80cfa | 2011-04-03 02:33:50 -0400 | [diff] [blame] | 10 | |
Rich Felker | 0c05bd3 | 2012-09-06 23:34:10 -0400 | [diff] [blame^] | 11 | _Noreturn void pthread_exit(void *result) |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 12 | { |
Rich Felker | 1ebde9c | 2011-04-17 17:06:05 -0400 | [diff] [blame] | 13 | pthread_t self = pthread_self(); |
Rich Felker | feee989 | 2011-04-17 11:43:03 -0400 | [diff] [blame] | 14 | int n; |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 15 | |
Rich Felker | afc35d5 | 2012-02-09 02:33:08 -0500 | [diff] [blame] | 16 | self->result = result; |
| 17 | |
| 18 | while (self->cancelbuf) { |
| 19 | void (*f)(void *) = self->cancelbuf->__f; |
| 20 | void *x = self->cancelbuf->__x; |
| 21 | self->cancelbuf = self->cancelbuf->__next; |
| 22 | f(x); |
Rich Felker | 1ebde9c | 2011-04-17 17:06:05 -0400 | [diff] [blame] | 23 | } |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 24 | |
Rich Felker | a6054e3 | 2011-04-19 23:09:14 -0400 | [diff] [blame] | 25 | __pthread_tsd_run_dtors(); |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 26 | |
Rich Felker | bbbe87e | 2012-07-12 11:23:43 -0400 | [diff] [blame] | 27 | __lock(self->exitlock); |
Rich Felker | f58c8a0 | 2011-06-14 01:25:17 -0400 | [diff] [blame] | 28 | |
Rich Felker | 5fcebcd | 2011-03-10 18:31:37 -0500 | [diff] [blame] | 29 | /* Mark this thread dead before decrementing count */ |
Rich Felker | bbbe87e | 2012-07-12 11:23:43 -0400 | [diff] [blame] | 30 | __lock(self->killlock); |
Rich Felker | 5fcebcd | 2011-03-10 18:31:37 -0500 | [diff] [blame] | 31 | self->dead = 1; |
Rich Felker | bbbe87e | 2012-07-12 11:23:43 -0400 | [diff] [blame] | 32 | __unlock(self->killlock); |
Rich Felker | 19eb13b | 2011-02-19 11:04:36 -0500 | [diff] [blame] | 33 | |
Rich Felker | feee989 | 2011-04-17 11:43:03 -0400 | [diff] [blame] | 34 | do n = libc.threads_minus_1; |
| 35 | while (n && a_cas(&libc.threads_minus_1, n, n-1)!=n); |
| 36 | if (!n) exit(0); |
Rich Felker | fb11b6b | 2011-02-19 10:38:57 -0500 | [diff] [blame] | 37 | |
Rich Felker | 5fcebcd | 2011-03-10 18:31:37 -0500 | [diff] [blame] | 38 | if (self->detached && self->map_base) { |
Rich Felker | 92f8396 | 2012-07-11 23:36:46 -0400 | [diff] [blame] | 39 | if (self->detached == 2) |
| 40 | __syscall(SYS_set_tid_address, 0); |
Rich Felker | 2f43704 | 2012-08-09 22:52:13 -0400 | [diff] [blame] | 41 | __syscall(SYS_rt_sigprocmask, SIG_BLOCK, |
| 42 | SIGALL_SET, 0, __SYSCALL_SSLEN); |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 43 | __unmapself(self->map_base, self->map_size); |
Rich Felker | 5fcebcd | 2011-03-10 18:31:37 -0500 | [diff] [blame] | 44 | } |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 45 | |
Rich Felker | 0c05bd3 | 2012-09-06 23:34:10 -0400 | [diff] [blame^] | 46 | for (;;) __syscall(SYS_exit, 0); |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 47 | } |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 48 | |
Rich Felker | cfd892f | 2012-05-23 14:13:54 -0400 | [diff] [blame] | 49 | void __do_cleanup_push(struct __ptcb *cb) |
Rich Felker | 5f37fc1 | 2011-08-03 19:57:46 -0400 | [diff] [blame] | 50 | { |
| 51 | struct pthread *self = pthread_self(); |
| 52 | cb->__next = self->cancelbuf; |
| 53 | self->cancelbuf = cb; |
| 54 | } |
| 55 | |
Rich Felker | cfd892f | 2012-05-23 14:13:54 -0400 | [diff] [blame] | 56 | void __do_cleanup_pop(struct __ptcb *cb) |
Rich Felker | 5f37fc1 | 2011-08-03 19:57:46 -0400 | [diff] [blame] | 57 | { |
Rich Felker | afc35d5 | 2012-02-09 02:33:08 -0500 | [diff] [blame] | 58 | __pthread_self()->cancelbuf = cb->__next; |
Rich Felker | 5f37fc1 | 2011-08-03 19:57:46 -0400 | [diff] [blame] | 59 | } |
| 60 | |
Rich Felker | 3f72cda | 2011-09-18 10:14:37 -0400 | [diff] [blame] | 61 | static int start(void *p) |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 62 | { |
Rich Felker | 3f72cda | 2011-09-18 10:14:37 -0400 | [diff] [blame] | 63 | pthread_t self = p; |
Rich Felker | 99b8a25 | 2011-05-07 23:23:58 -0400 | [diff] [blame] | 64 | if (self->unblock_cancel) |
Rich Felker | 2f43704 | 2012-08-09 22:52:13 -0400 | [diff] [blame] | 65 | __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, |
| 66 | SIGPT_SET, 0, __SYSCALL_SSLEN); |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 67 | pthread_exit(self->start(self->start_arg)); |
Rich Felker | 3f72cda | 2011-09-18 10:14:37 -0400 | [diff] [blame] | 68 | return 0; |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 69 | } |
| 70 | |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 71 | #define ROUND(x) (((x)+PAGE_SIZE-1)&-PAGE_SIZE) |
| 72 | |
| 73 | /* pthread_key_create.c overrides this */ |
| 74 | static const size_t dummy = 0; |
| 75 | weak_alias(dummy, __pthread_tsd_size); |
| 76 | |
Rich Felker | dba68bf | 2011-07-30 08:02:14 -0400 | [diff] [blame] | 77 | static FILE *const dummy_file = 0; |
| 78 | weak_alias(dummy_file, __stdin_used); |
| 79 | weak_alias(dummy_file, __stdout_used); |
| 80 | weak_alias(dummy_file, __stderr_used); |
| 81 | |
| 82 | static void init_file_lock(FILE *f) |
| 83 | { |
| 84 | if (f && f->lock<0) f->lock = 0; |
| 85 | } |
| 86 | |
Rich Felker | 400c5e5 | 2012-09-06 22:44:55 -0400 | [diff] [blame] | 87 | int pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict attr, void *(*entry)(void *), void *restrict arg) |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 88 | { |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 89 | int ret; |
Rich Felker | 11e4b92 | 2011-05-07 23:39:48 -0400 | [diff] [blame] | 90 | size_t size = DEFAULT_STACK_SIZE + DEFAULT_GUARD_SIZE; |
| 91 | size_t guard = DEFAULT_GUARD_SIZE; |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 92 | struct pthread *self = pthread_self(), *new; |
| 93 | unsigned char *map, *stack, *tsd; |
Rich Felker | 92f8396 | 2012-07-11 23:36:46 -0400 | [diff] [blame] | 94 | unsigned flags = 0x7d8f00; |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 95 | |
Rich Felker | 7fd3995 | 2011-04-03 16:15:15 -0400 | [diff] [blame] | 96 | if (!self) return ENOSYS; |
Rich Felker | 9080cc1 | 2011-04-17 16:53:54 -0400 | [diff] [blame] | 97 | if (!libc.threaded) { |
Rich Felker | dba68bf | 2011-07-30 08:02:14 -0400 | [diff] [blame] | 98 | for (FILE *f=libc.ofl_head; f; f=f->next) |
| 99 | init_file_lock(f); |
| 100 | init_file_lock(__stdin_used); |
| 101 | init_file_lock(__stdout_used); |
| 102 | init_file_lock(__stderr_used); |
Rich Felker | 9080cc1 | 2011-04-17 16:53:54 -0400 | [diff] [blame] | 103 | libc.threaded = 1; |
| 104 | } |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 105 | |
Rich Felker | 819006a | 2012-06-09 19:53:29 -0400 | [diff] [blame] | 106 | if (attr && attr->_a_stackaddr) { |
| 107 | map = 0; |
| 108 | tsd = (void *)(attr->_a_stackaddr-__pthread_tsd_size & -16); |
| 109 | } else { |
| 110 | if (attr) { |
| 111 | guard = ROUND(attr->_a_guardsize + DEFAULT_GUARD_SIZE); |
| 112 | size = guard + ROUND(attr->_a_stacksize + DEFAULT_STACK_SIZE); |
| 113 | } |
| 114 | size += __pthread_tsd_size; |
| 115 | map = mmap(0, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0); |
| 116 | if (map == MAP_FAILED) return EAGAIN; |
| 117 | if (guard) mprotect(map, guard, PROT_NONE); |
| 118 | tsd = map + size - __pthread_tsd_size; |
Rich Felker | 11e4b92 | 2011-05-07 23:39:48 -0400 | [diff] [blame] | 119 | } |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 120 | new = (void *)(tsd - sizeof *new - PAGE_SIZE%sizeof *new); |
| 121 | new->map_base = map; |
| 122 | new->map_size = size; |
| 123 | new->pid = self->pid; |
| 124 | new->errno_ptr = &new->errno_val; |
| 125 | new->start = entry; |
| 126 | new->start_arg = arg; |
| 127 | new->self = new; |
| 128 | new->tsd = (void *)tsd; |
Rich Felker | 92f8396 | 2012-07-11 23:36:46 -0400 | [diff] [blame] | 129 | if (attr && attr->_a_detach) { |
| 130 | new->detached = 1; |
| 131 | flags -= 0x200000; |
| 132 | } |
Rich Felker | bf619d8 | 2011-03-29 12:58:22 -0400 | [diff] [blame] | 133 | new->unblock_cancel = self->cancel; |
Rich Felker | 58aa5f4 | 2012-05-03 20:42:45 -0400 | [diff] [blame] | 134 | new->canary = self->canary ^ (uintptr_t)&new; |
Rich Felker | 3f72cda | 2011-09-18 10:14:37 -0400 | [diff] [blame] | 135 | stack = (void *)new; |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 136 | |
Rich Felker | acb0480 | 2011-07-29 22:59:44 -0400 | [diff] [blame] | 137 | __synccall_lock(); |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 138 | |
| 139 | a_inc(&libc.threads_minus_1); |
Rich Felker | 92f8396 | 2012-07-11 23:36:46 -0400 | [diff] [blame] | 140 | ret = __clone(start, stack, flags, new, &new->tid, new, &new->tid); |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 141 | |
Rich Felker | acb0480 | 2011-07-29 22:59:44 -0400 | [diff] [blame] | 142 | __synccall_unlock(); |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 143 | |
| 144 | if (ret < 0) { |
| 145 | a_dec(&libc.threads_minus_1); |
| 146 | munmap(map, size); |
Rich Felker | 5966680 | 2011-02-15 02:20:21 -0500 | [diff] [blame] | 147 | return EAGAIN; |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 148 | } |
| 149 | *res = new; |
| 150 | return 0; |
| 151 | } |