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Move some tracing related code into its own function as it will

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be needed for system call related ptrace functionality I plan
to commit soon.
This commit is contained in:
Robert Drehmel 2003-09-26 15:09:46 +00:00
parent ffd1bc0626
commit 4cc9f52f78
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=120475
2 changed files with 25 additions and 15 deletions
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39
sys/kern/kern_sig.c
View file

@ -2021,6 +2021,29 @@ tdsigwakeup(struct thread *td, int sig, sig_t action)
#endif
}
void
ptracestop(struct thread *td, int sig)
{
struct proc *p = td->td_proc;
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK,
&p->p_mtx.mtx_object, "Stopping for traced signal");
p->p_xstat = sig;
PROC_LOCK(p->p_pptr);
psignal(p->p_pptr, SIGCHLD);
PROC_UNLOCK(p->p_pptr);
mtx_lock_spin(&sched_lock);
stop(p); /* uses schedlock too eventually */
thread_suspend_one(td);
PROC_UNLOCK(p);
DROP_GIANT();
p->p_stats->p_ru.ru_nivcsw++;
mi_switch();
mtx_unlock_spin(&sched_lock);
PICKUP_GIANT();
}
/*
* If the current process has received a signal (should be caught or cause
* termination, should interrupt current syscall), return the signal number.
@ -2074,21 +2097,7 @@ issignal(td)
* If traced, always stop.
*/
mtx_unlock(&ps->ps_mtx);
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK,
&p->p_mtx.mtx_object, "Stopping for traced signal");
p->p_xstat = sig;
PROC_LOCK(p->p_pptr);
psignal(p->p_pptr, SIGCHLD);
PROC_UNLOCK(p->p_pptr);
mtx_lock_spin(&sched_lock);
stop(p); /* uses schedlock too eventually */
thread_suspend_one(td);
PROC_UNLOCK(p);
DROP_GIANT();
p->p_stats->p_ru.ru_nivcsw++;
mi_switch();
mtx_unlock_spin(&sched_lock);
PICKUP_GIANT();
ptracestop(td, sig);
PROC_LOCK(p);
mtx_lock(&ps->ps_mtx);

1
sys/sys/signalvar.h
View file

@ -276,6 +276,7 @@ void siginit(struct proc *p);
void signotify(struct thread *td);
void tdsignal(struct thread *td, int sig, sigtarget_t target);
void trapsignal(struct thread *td, int sig, u_long code);
void ptracestop(struct thread *td, int sig);
/*
* Machine-dependent functions: