#include "pthread_impl.h"
#include "stdio_impl.h"
+#include <sys/mman.h>
static void dummy_0()
{
}
-weak_alias(dummy_0, __synccall_lock);
-weak_alias(dummy_0, __synccall_unlock);
+weak_alias(dummy_0, __acquire_ptc);
+weak_alias(dummy_0, __release_ptc);
weak_alias(dummy_0, __pthread_tsd_run_dtors);
-void pthread_exit(void *result)
+_Noreturn void pthread_exit(void *result)
{
pthread_t self = pthread_self();
int n;
__pthread_tsd_run_dtors();
- __lock(&self->exitlock);
+ __lock(self->exitlock);
/* Mark this thread dead before decrementing count */
- __lock(&self->killlock);
+ __lock(self->killlock);
self->dead = 1;
- a_store(&self->killlock, 0);
+ __unlock(self->killlock);
do n = libc.threads_minus_1;
while (n && a_cas(&libc.threads_minus_1, n, n-1)!=n);
if (!n) exit(0);
if (self->detached && self->map_base) {
- __syscall(SYS_rt_sigprocmask, SIG_BLOCK, (uint64_t[]){-1},0,8);
+ if (self->detached == 2)
+ __syscall(SYS_set_tid_address, 0);
+ __syscall(SYS_rt_sigprocmask, SIG_BLOCK,
+ SIGALL_SET, 0, __SYSCALL_SSLEN);
__unmapself(self->map_base, self->map_size);
}
- __syscall(SYS_exit, 0);
+ for (;;) __syscall(SYS_exit, 0);
}
-void __do_cleanup_push(struct __ptcb *cb, void (*f)(void *), void *x)
+void __do_cleanup_push(struct __ptcb *cb)
{
struct pthread *self = pthread_self();
cb->__next = self->cancelbuf;
self->cancelbuf = cb;
}
-void __do_cleanup_pop(struct __ptcb *cb, int run)
+void __do_cleanup_pop(struct __ptcb *cb)
{
__pthread_self()->cancelbuf = cb->__next;
}
static int start(void *p)
{
pthread_t self = p;
+ if (self->startlock[0]) {
+ __wait(self->startlock, 0, 1, 1);
+ if (self->startlock[0]) {
+ self->detached = 2;
+ pthread_exit(0);
+ }
+ __syscall(SYS_rt_sigprocmask, SIG_SETMASK,
+ self->sigmask, 0, __SYSCALL_SSLEN);
+ }
if (self->unblock_cancel)
- __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, 8);
+ __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK,
+ SIGPT_SET, 0, __SYSCALL_SSLEN);
pthread_exit(self->start(self->start_arg));
return 0;
}
if (f && f->lock<0) f->lock = 0;
}
-int pthread_create(pthread_t *res, const pthread_attr_t *attr, void *(*entry)(void *), void *arg)
+void *__copy_tls(unsigned char *);
+
+int pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict attr, void *(*entry)(void *), void *restrict arg)
{
int ret;
size_t size = DEFAULT_STACK_SIZE + DEFAULT_GUARD_SIZE;
size_t guard = DEFAULT_GUARD_SIZE;
struct pthread *self = pthread_self(), *new;
unsigned char *map, *stack, *tsd;
+ unsigned flags = 0x7d8f00;
+ int do_sched = 0;
if (!self) return ENOSYS;
if (!libc.threaded) {
init_file_lock(__stdin_used);
init_file_lock(__stdout_used);
init_file_lock(__stderr_used);
- __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, 8);
libc.threaded = 1;
}
- if (attr) {
- guard = ROUND(attr->_a_guardsize + DEFAULT_GUARD_SIZE);
- size = guard + ROUND(attr->_a_stacksize + DEFAULT_STACK_SIZE);
+ __acquire_ptc();
+
+ if (attr && attr->_a_stackaddr) {
+ map = 0;
+ tsd = (void *)(attr->_a_stackaddr-__pthread_tsd_size & -16);
+ } else {
+ if (attr) {
+ guard = ROUND(attr->_a_guardsize + DEFAULT_GUARD_SIZE);
+ size = guard + ROUND(attr->_a_stacksize
+ + DEFAULT_STACK_SIZE + libc.tls_size);
+ }
+ size += __pthread_tsd_size;
+ if (guard) {
+ map = mmap(0, size, PROT_NONE, MAP_PRIVATE|MAP_ANON, -1, 0);
+ if (map == MAP_FAILED) return EAGAIN;
+ if (mprotect(map+guard, size-guard, PROT_READ|PROT_WRITE)) {
+ munmap(map, size);
+ return EAGAIN;
+ }
+ } else {
+ map = mmap(0, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
+ if (map == MAP_FAILED) return EAGAIN;
+ }
+ tsd = map + size - __pthread_tsd_size;
}
- size += __pthread_tsd_size;
- map = mmap(0, size, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, -1, 0);
- if (map == MAP_FAILED) return EAGAIN;
- if (guard) mprotect(map, guard, PROT_NONE);
-
- tsd = map + size - __pthread_tsd_size;
- new = (void *)(tsd - sizeof *new - PAGE_SIZE%sizeof *new);
+ new = __copy_tls(stack = tsd - libc.tls_size);
new->map_base = map;
new->map_size = size;
new->pid = self->pid;
new->start_arg = arg;
new->self = new;
new->tsd = (void *)tsd;
- if (attr) new->detached = attr->_a_detach;
+ if (attr && attr->_a_detach) {
+ new->detached = 1;
+ flags -= 0x200000;
+ }
+ if (attr && attr->_a_sched) {
+ do_sched = new->startlock[0] = 1;
+ __syscall(SYS_rt_sigprocmask, SIG_BLOCK,
+ SIGALL_SET, self->sigmask, __SYSCALL_SSLEN);
+ }
new->unblock_cancel = self->cancel;
- stack = (void *)new;
-
- __synccall_lock();
+ new->canary = self->canary;
a_inc(&libc.threads_minus_1);
- ret = __clone(start, stack, 0x7d8f00, new, &new->tid, new, &new->tid);
+ ret = __clone(start, stack, flags, new, &new->tid, TP_ADJ(new), &new->tid);
- __synccall_unlock();
+ __release_ptc();
+
+ if (do_sched) {
+ __syscall(SYS_rt_sigprocmask, SIG_SETMASK,
+ new->sigmask, 0, __SYSCALL_SSLEN);
+ }
if (ret < 0) {
a_dec(&libc.threads_minus_1);
munmap(map, size);
return EAGAIN;
}
+
+ if (do_sched) {
+ ret = __syscall(SYS_sched_setscheduler, new->tid,
+ attr->_a_policy, &attr->_a_prio);
+ a_store(new->startlock, ret<0 ? 2 : 0);
+ __wake(new->startlock, 1, 1);
+ if (ret < 0) return -ret;
+ }
+
*res = new;
return 0;
}