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 | 730bee7 | 2011-08-03 19:45:21 -0400 | [diff] [blame] | 11 | void __pthread_do_unwind(struct __ptcb *cb) |
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 | 1ebde9c | 2011-04-17 17:06:05 -0400 | [diff] [blame] | 16 | if (cb->__next) { |
| 17 | self->cancelbuf = cb->__next->__next; |
| 18 | longjmp((void *)cb->__next->__jb, 1); |
| 19 | } |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 20 | |
Rich Felker | a6054e3 | 2011-04-19 23:09:14 -0400 | [diff] [blame] | 21 | __pthread_tsd_run_dtors(); |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 22 | |
Rich Felker | f58c8a0 | 2011-06-14 01:25:17 -0400 | [diff] [blame] | 23 | __lock(&self->exitlock); |
| 24 | |
Rich Felker | 5fcebcd | 2011-03-10 18:31:37 -0500 | [diff] [blame] | 25 | /* Mark this thread dead before decrementing count */ |
Rich Felker | 7779dbd | 2011-06-14 01:35:51 -0400 | [diff] [blame] | 26 | __lock(&self->killlock); |
Rich Felker | 5fcebcd | 2011-03-10 18:31:37 -0500 | [diff] [blame] | 27 | self->dead = 1; |
Rich Felker | 7779dbd | 2011-06-14 01:35:51 -0400 | [diff] [blame] | 28 | a_store(&self->killlock, 0); |
Rich Felker | 19eb13b | 2011-02-19 11:04:36 -0500 | [diff] [blame] | 29 | |
Rich Felker | feee989 | 2011-04-17 11:43:03 -0400 | [diff] [blame] | 30 | do n = libc.threads_minus_1; |
| 31 | while (n && a_cas(&libc.threads_minus_1, n, n-1)!=n); |
| 32 | if (!n) exit(0); |
Rich Felker | fb11b6b | 2011-02-19 10:38:57 -0500 | [diff] [blame] | 33 | |
Rich Felker | 5fcebcd | 2011-03-10 18:31:37 -0500 | [diff] [blame] | 34 | if (self->detached && self->map_base) { |
Rich Felker | 99b8a25 | 2011-05-07 23:23:58 -0400 | [diff] [blame] | 35 | __syscall(SYS_rt_sigprocmask, SIG_BLOCK, (uint64_t[]){-1},0,8); |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 36 | __unmapself(self->map_base, self->map_size); |
Rich Felker | 5fcebcd | 2011-03-10 18:31:37 -0500 | [diff] [blame] | 37 | } |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 38 | |
Rich Felker | 74950b3 | 2011-04-06 19:47:50 -0400 | [diff] [blame] | 39 | __syscall(SYS_exit, 0); |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 40 | } |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 41 | |
Rich Felker | 5f37fc1 | 2011-08-03 19:57:46 -0400 | [diff] [blame] | 42 | void __pthread_do_register(struct __ptcb *cb) |
| 43 | { |
| 44 | struct pthread *self = pthread_self(); |
| 45 | cb->__next = self->cancelbuf; |
| 46 | self->cancelbuf = cb; |
| 47 | } |
| 48 | |
| 49 | void __pthread_do_unregister(struct __ptcb *cb) |
| 50 | { |
| 51 | struct pthread *self = __pthread_self(); |
| 52 | self->cancelbuf = self->cancelbuf->__next; |
| 53 | } |
| 54 | |
Rich Felker | 3f72cda | 2011-09-18 10:14:37 -0400 | [diff] [blame^] | 55 | static int start(void *p) |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 56 | { |
Rich Felker | 3f72cda | 2011-09-18 10:14:37 -0400 | [diff] [blame^] | 57 | pthread_t self = p; |
Rich Felker | 99b8a25 | 2011-05-07 23:23:58 -0400 | [diff] [blame] | 58 | if (self->unblock_cancel) |
Rich Felker | 4c4e22d | 2011-05-07 23:37:10 -0400 | [diff] [blame] | 59 | __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, 8); |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 60 | pthread_exit(self->start(self->start_arg)); |
Rich Felker | 3f72cda | 2011-09-18 10:14:37 -0400 | [diff] [blame^] | 61 | return 0; |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 62 | } |
| 63 | |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 64 | #define ROUND(x) (((x)+PAGE_SIZE-1)&-PAGE_SIZE) |
| 65 | |
| 66 | /* pthread_key_create.c overrides this */ |
| 67 | static const size_t dummy = 0; |
| 68 | weak_alias(dummy, __pthread_tsd_size); |
| 69 | |
Rich Felker | dba68bf | 2011-07-30 08:02:14 -0400 | [diff] [blame] | 70 | static FILE *const dummy_file = 0; |
| 71 | weak_alias(dummy_file, __stdin_used); |
| 72 | weak_alias(dummy_file, __stdout_used); |
| 73 | weak_alias(dummy_file, __stderr_used); |
| 74 | |
| 75 | static void init_file_lock(FILE *f) |
| 76 | { |
| 77 | if (f && f->lock<0) f->lock = 0; |
| 78 | } |
| 79 | |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 80 | int pthread_create(pthread_t *res, const pthread_attr_t *attr, void *(*entry)(void *), void *arg) |
| 81 | { |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 82 | int ret; |
Rich Felker | 11e4b92 | 2011-05-07 23:39:48 -0400 | [diff] [blame] | 83 | size_t size = DEFAULT_STACK_SIZE + DEFAULT_GUARD_SIZE; |
| 84 | size_t guard = DEFAULT_GUARD_SIZE; |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 85 | struct pthread *self = pthread_self(), *new; |
| 86 | unsigned char *map, *stack, *tsd; |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 87 | |
Rich Felker | 7fd3995 | 2011-04-03 16:15:15 -0400 | [diff] [blame] | 88 | if (!self) return ENOSYS; |
Rich Felker | 9080cc1 | 2011-04-17 16:53:54 -0400 | [diff] [blame] | 89 | if (!libc.threaded) { |
Rich Felker | dba68bf | 2011-07-30 08:02:14 -0400 | [diff] [blame] | 90 | for (FILE *f=libc.ofl_head; f; f=f->next) |
| 91 | init_file_lock(f); |
| 92 | init_file_lock(__stdin_used); |
| 93 | init_file_lock(__stdout_used); |
| 94 | init_file_lock(__stderr_used); |
Rich Felker | 4c4e22d | 2011-05-07 23:37:10 -0400 | [diff] [blame] | 95 | __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, 8); |
Rich Felker | 9080cc1 | 2011-04-17 16:53:54 -0400 | [diff] [blame] | 96 | libc.threaded = 1; |
| 97 | } |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 98 | |
Rich Felker | 11e4b92 | 2011-05-07 23:39:48 -0400 | [diff] [blame] | 99 | if (attr) { |
| 100 | guard = ROUND(attr->_a_guardsize + DEFAULT_GUARD_SIZE); |
| 101 | size = guard + ROUND(attr->_a_stacksize + DEFAULT_STACK_SIZE); |
| 102 | } |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 103 | size += __pthread_tsd_size; |
| 104 | map = mmap(0, size, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, -1, 0); |
| 105 | if (!map) return EAGAIN; |
Rich Felker | 29fae65 | 2011-03-16 11:36:21 -0400 | [diff] [blame] | 106 | if (guard) mprotect(map, guard, PROT_NONE); |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 107 | |
| 108 | tsd = map + size - __pthread_tsd_size; |
| 109 | new = (void *)(tsd - sizeof *new - PAGE_SIZE%sizeof *new); |
| 110 | new->map_base = map; |
| 111 | new->map_size = size; |
| 112 | new->pid = self->pid; |
| 113 | new->errno_ptr = &new->errno_val; |
| 114 | new->start = entry; |
| 115 | new->start_arg = arg; |
| 116 | new->self = new; |
| 117 | new->tsd = (void *)tsd; |
Rich Felker | 11e4b92 | 2011-05-07 23:39:48 -0400 | [diff] [blame] | 118 | if (attr) new->detached = attr->_a_detach; |
Rich Felker | bf619d8 | 2011-03-29 12:58:22 -0400 | [diff] [blame] | 119 | new->unblock_cancel = self->cancel; |
Rich Felker | 3f72cda | 2011-09-18 10:14:37 -0400 | [diff] [blame^] | 120 | stack = (void *)new; |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 121 | |
Rich Felker | acb0480 | 2011-07-29 22:59:44 -0400 | [diff] [blame] | 122 | __synccall_lock(); |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 123 | |
| 124 | a_inc(&libc.threads_minus_1); |
Rich Felker | 3f72cda | 2011-09-18 10:14:37 -0400 | [diff] [blame^] | 125 | ret = __clone(start, stack, 0x7d8f00, new, &new->tid, new, &new->tid); |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 126 | |
Rich Felker | acb0480 | 2011-07-29 22:59:44 -0400 | [diff] [blame] | 127 | __synccall_unlock(); |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 128 | |
| 129 | if (ret < 0) { |
| 130 | a_dec(&libc.threads_minus_1); |
| 131 | munmap(map, size); |
Rich Felker | 5966680 | 2011-02-15 02:20:21 -0500 | [diff] [blame] | 132 | return EAGAIN; |
Rich Felker | 0b44a03 | 2011-02-12 00:22:29 -0500 | [diff] [blame] | 133 | } |
| 134 | *res = new; |
| 135 | return 0; |
| 136 | } |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 137 | |
| 138 | void pthread_exit(void *result) |
| 139 | { |
| 140 | struct pthread *self = pthread_self(); |
Rich Felker | feee989 | 2011-04-17 11:43:03 -0400 | [diff] [blame] | 141 | struct __ptcb cb = { .__next = self->cancelbuf }; |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 142 | self->result = result; |
Rich Felker | 56385dd | 2011-08-03 19:50:35 -0400 | [diff] [blame] | 143 | __pthread_do_unwind(&cb); |
Rich Felker | 1a9a2ff | 2011-02-13 19:58:30 -0500 | [diff] [blame] | 144 | } |