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(__pthread_attr_setstack): Fix alignment check. (pthread_getattr_np): __stackaddr is top of stack, not bottom.

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This commit is contained in:
Ulrich Drepper 2001-03-21 18:46:15 +00:00
parent 9113b2a2da
commit 1fb7dc3c42
1 changed files with 8 additions and 6 deletions
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14
linuxthreads/attr.c
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@ -225,7 +225,7 @@ int __pthread_attr_setstack (pthread_attr_t *attr, void *stackaddr,
int err;
if ((((uintptr_t) stackaddr)
& ~__alignof__ (struct _pthread_descr_struct)) != 0)
& (__alignof__ (struct _pthread_descr_struct) - 1)) != 0)
err = EINVAL;
else
err = __pthread_attr_setstacksize (attr, stacksize);
@ -263,7 +263,6 @@ int pthread_getattr_np (pthread_t thread, pthread_attr_t *attr)
{
pthread_handle handle = thread_handle (thread);
pthread_descr descr;
char *guardaddr;
if (handle == NULL)
return ENOENT;
@ -282,21 +281,24 @@ int pthread_getattr_np (pthread_t thread, pthread_attr_t *attr)
(struct sched_param *) &attr->__schedparam) != 0)
return errno;
guardaddr = descr->p_guardaddr;
attr->__inheritsched = descr->p_inheritsched;
attr->__scope = PTHREAD_SCOPE_SYSTEM;
attr->__stacksize = (char *)(descr + 1) - guardaddr - descr->p_guardsize;
attr->__stacksize = (char *)(descr + 1) - (char *)descr->p_guardaddr
- descr->p_guardsize;
attr->__guardsize = descr->p_guardsize;
attr->__stackaddr_set = descr->p_userstack;
#ifdef NEED_SEPARATE_REGISTER_STACK
guardaddr -= attr->__stacksize;
attr->__stacksize *= 2;
/* XXX This is awkward. The guard pages are in the middle of the
two stacks. We must count the guard size in the stack size since
otherwise the range of the stack area cannot be computed. */
attr->__stacksize += attr->__guardsize;
#endif
attr->__stackaddr = guardaddr;
#ifndef _STACK_GROWS_UP
attr->__stackaddr = (char *)(descr + 1);
#else
#error __stackaddr not handled
#endif
return 0;
}