Differential D31236 Diff 92491 sys/compat/linux/linux_fork.c

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sys/compat/linux/linux_fork.c

Show First 20 Lines • Show All 401 Lines • ▼ Show 20 Lines	LINUX_CTR3(set_tid_address, "tidptr(%d) %p, returns %d",
em->em_tid, args->tidptr, td->td_retval[0]);		em->em_tid, args->tidptr, td->td_retval[0]);

return (0);		return (0);
}		}

void		void
linux_thread_detach(struct thread *td)		linux_thread_detach(struct thread *td)
{		{
struct linux_sys_futex_args cup;
struct linux_emuldata *em;		struct linux_emuldata *em;
int *child_clear_tid;		int *child_clear_tid;
int error;		int error;

em = em_find(td);		em = em_find(td);
KASSERT(em != NULL, ("thread_detach: emuldata not found.\n"));		KASSERT(em != NULL, ("thread_detach: emuldata not found.\n"));

LINUX_CTR1(thread_detach, "thread(%d)", em->em_tid);		LINUX_CTR1(thread_detach, "thread(%d)", em->em_tid);

release_futexes(td, em);		release_futexes(td, em);

child_clear_tid = em->child_clear_tid;		child_clear_tid = em->child_clear_tid;

if (child_clear_tid != NULL) {		if (child_clear_tid != NULL) {
LINUX_CTR2(thread_detach, "thread(%d) %p",		LINUX_CTR2(thread_detach, "thread(%d) %p",
em->em_tid, child_clear_tid);		em->em_tid, child_clear_tid);

error = suword32(child_clear_tid, 0);		error = suword32(child_clear_tid, 0);
if (error != 0)		if (error != 0)
return;		return;

cup.uaddr = child_clear_tid;		error = futex_wake(td, child_clear_tid, 1, false);
cup.op = LINUX_FUTEX_WAKE;
cup.val = 1; /* wake one */
cup.timeout = NULL;
cup.uaddr2 = NULL;
cup.val3 = 0;
error = linux_sys_futex(td, &cup);
/*		/*
* this cannot happen at the moment and if this happens it		* this cannot happen at the moment and if this happens it
* probably means there is a user space bug		* probably means there is a user space bug
*/		*/
if (error != 0)		if (error != 0)
linux_msg(td, "futex stuff in thread_detach failed.");		linux_msg(td, "futex stuff in thread_detach failed.");
}		}
}		}