/*
* Kill all lwps associated with the current process except the
* current lwp. Return an error if we race another thread trying to
* do the same thing and lose the race.
*
* If forexec is non-zero the current thread and process flags are
* cleaned up so they can be reused.
*
* Caller must hold curproc->p_token
*/
int
killalllwps(int forexec)
{
struct lwp *lp = curthread->td_lwp;
struct proc *p = lp->lwp_proc;
/*
* Interlock against P_WEXIT. Only one of the process's thread
* is allowed to do the master exit.
*/
if (p->p_flags & P_WEXIT)
return (EALREADY);
p->p_flags |= P_WEXIT;
/*
* Interlock with LWP_MP_WEXIT and kill any remaining LWPs
*/
atomic_set_int(&lp->lwp_mpflags, LWP_MP_WEXIT);
if (p->p_nthreads > 1)
killlwps(lp);
/*
* If doing this for an exec, clean up the remaining thread
* (us) for continuing operation after all the other threads
* have been killed.
*/
if (forexec) {
atomic_clear_int(&lp->lwp_mpflags, LWP_MP_WEXIT);
p->p_flags &= ~P_WEXIT;
}
return(0);
}
/*
* Kill all lwps associated with the current process except the
* current lwp. Return an error if we race another thread trying to
* do the same thing and lose the race.
*
* If forexec is non-zero the current thread and process flags are
* cleaned up so they can be reused.
*
* Caller must hold curproc->p_token
*/
int
killalllwps(int forexec)
{
struct lwp *lp = curthread->td_lwp;
struct proc *p = lp->lwp_proc;
int fakestop;
/*
* Interlock against P_WEXIT. Only one of the process's thread
* is allowed to do the master exit.
*/
if (p->p_flags & P_WEXIT)
return (EALREADY);
p->p_flags |= P_WEXIT;
/*
* Set temporary stopped state in case we are racing a coredump.
* Otherwise the coredump may hang forever.
*/
if (lp->lwp_mpflags & LWP_MP_WSTOP) {
fakestop = 0;
} else {
atomic_set_int(&lp->lwp_mpflags, LWP_MP_WSTOP);
++p->p_nstopped;
fakestop = 1;
wakeup(&p->p_nstopped);
}
/*
* Interlock with LWP_MP_WEXIT and kill any remaining LWPs
*/
atomic_set_int(&lp->lwp_mpflags, LWP_MP_WEXIT);
if (p->p_nthreads > 1)
killlwps(lp);
/*
* Undo temporary stopped state
*/
if (fakestop) {
atomic_clear_int(&lp->lwp_mpflags, LWP_MP_WSTOP);
--p->p_nstopped;
}
/*
* If doing this for an exec, clean up the remaining thread
* (us) for continuing operation after all the other threads
* have been killed.
*/
if (forexec) {
atomic_clear_int(&lp->lwp_mpflags, LWP_MP_WEXIT);
p->p_flags &= ~P_WEXIT;
}
return(0);
}
