/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
#define SIGPROP /* include signal properties table */
#include <sys/param.h>
-#include <sys/signalvar.h>
#include <sys/resourcevar.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/kernel.h>
#include <sys/wait.h>
+#include <sys/signalvar.h>
+#if KTRACE
#include <sys/ktrace.h>
+#endif
#include <sys/syslog.h>
#include <sys/stat.h>
#include <sys/lock.h>
-
+#include <sys/kdebug.h>
#include <sys/mount.h>
+#include <bsm/audit_kernel.h>
+
#include <kern/cpu_number.h>
#include <sys/vm.h>
#include <sys/user.h> /* for coredump */
#include <kern/ast.h> /* for APC support */
#include <kern/thread.h>
+#include <kern/sched_prim.h>
#include <kern/thread_call.h>
+#include <mach/exception.h>
+
+extern void doexception(int exc, int code, int sub);
void stop __P((struct proc *p));
int cansignal __P((struct proc *, struct pcred *, struct proc *, int));
int killpg1 __P((struct proc *, int, int, int));
void sigexit_locked __P((struct proc *, int));
-void setsigvec __P((struct proc *, int, struct sigaction *));
+int setsigvec __P((struct proc *, int, struct __sigaction *));
void exit1 __P((struct proc *, int, int *));
int signal_lock __P((struct proc *));
int signal_unlock __P((struct proc *));
-void signal_setast __P((thread_act_t *));
-void signal_clearast __P((thread_act_t *));
-void psignal_lock __P((struct proc *, int, int, int));
+void signal_setast __P((thread_act_t));
+void psignal_lock __P((struct proc *, int, int));
+void psignal_uthread __P((thread_act_t, int));
+kern_return_t do_bsdexception(int, int, int);
+
+static int filt_sigattach(struct knote *kn);
+static void filt_sigdetach(struct knote *kn);
+static int filt_signal(struct knote *kn, long hint);
+
+struct filterops sig_filtops =
+ { 0, filt_sigattach, filt_sigdetach, filt_signal };
#if SIGNAL_DEBUG
void ram_printf __P((int));
printf("x is %d",x);
}
-
#endif /* SIGNAL_DEBUG */
+
int
signal_lock(struct proc *p)
{
int error = 0;
+#if DIAGNOSTIC
#if SIGNAL_DEBUG
#ifdef __ppc__
{
}
#endif /* __ppc__ */
#endif /* SIGNAL_DEBUG */
+#endif /* DIAGNOSTIC */
siglock_retry:
- error = lockmgr(&p->signal_lock, LK_EXCLUSIVE, 0, (struct proc *)0);
+ /* TBD: check p last arg */
+ error = lockmgr(&p->signal_lock, LK_EXCLUSIVE, 0, (struct proc *)p);
if (error == EINTR)
goto siglock_retry;
return(error);
int
signal_unlock(struct proc *p)
{
+#if DIAGNOSTIC
#if SIGNAL_DEBUG
#ifdef __ppc__
{
}
#endif /* __ppc__ */
#endif /* SIGNAL_DEBUG */
+#endif /* DIAGNOSTIC */
- return(lockmgr(&p->signal_lock, LK_RELEASE, (simple_lock_t)0, (struct proc *)0));
+ /* TBD: check p last arg */
+ return(lockmgr(&p->signal_lock, LK_RELEASE, (simple_lock_t)0, (struct proc *)p));
}
void
signal_setast(sig_actthread)
-thread_act_t *sig_actthread;
-{
- thread_ast_set(sig_actthread, AST_BSD);
- if ((thread_act_t *)current_act() == sig_actthread)
- ast_on(AST_BSD);
-}
-
-void
-signal_clearast(sig_actthread)
-thread_act_t *sig_actthread;
+thread_act_t sig_actthread;
{
- thread_ast_clear(sig_actthread, AST_BSD);
- if ((thread_act_t *)current_act() == sig_actthread)
- ast_off(AST_BSD);
+ act_set_astbsd(sig_actthread);
}
/*
struct proc *q;
int signum;
{
+ /* you can signal yourself */
+ if (p == q)
+ return(1);
+
if (pc->pc_ucred->cr_uid == 0)
return (1); /* root can always signal */
struct sigaction_args {
int signum;
- struct sigaction *nsa;
+ struct __sigaction *nsa;
struct sigaction *osa;
};
register_t *retval;
{
struct sigaction vec;
+ struct __sigaction __vec;
+
register struct sigaction *sa;
register struct sigacts *ps = p->p_sigacts;
register int signum;
- int bit, error;
+ int bit, error=0;
signum = uap->signum;
if (signum <= 0 || signum >= NSIG ||
sa->sa_flags |= SA_ONSTACK;
if ((ps->ps_sigintr & bit) == 0)
sa->sa_flags |= SA_RESTART;
- if (p->p_flag & P_NOCLDSTOP)
+ if (ps->ps_siginfo & bit)
+ sa->sa_flags |= SA_SIGINFO;
+ if (ps->ps_signodefer & bit)
+ sa->sa_flags |= SA_NODEFER;
+ if (ps->ps_64regset & bit)
+ sa->sa_flags |= SA_64REGSET;
+ if ((signum == SIGCHLD) && (p->p_flag & P_NOCLDSTOP))
sa->sa_flags |= SA_NOCLDSTOP;
+ if ((signum == SIGCHLD) && (p->p_flag & P_NOCLDWAIT))
+ sa->sa_flags |= SA_NOCLDWAIT;
if (error = copyout((caddr_t)sa, (caddr_t)uap->osa,
sizeof (vec)))
return (error);
}
if (uap->nsa) {
- if (error = copyin((caddr_t)uap->nsa, (caddr_t)sa,
- sizeof (vec)))
+ if (error = copyin((caddr_t)uap->nsa, (caddr_t)&__vec,
+ sizeof (__vec)))
return (error);
- setsigvec(p, signum, sa);
+ error = setsigvec(p, signum, &__vec);
}
- return (0);
+ return (error);
}
-static int
-reset_sigbits(thread_act_t th_act, int bit)
+/* Routines to manipulate bits on all threads */
+int
+clear_procsiglist(struct proc *p, int bit)
{
-struct uthread *ut;
- ut = get_bsdthread_info(th_act);
- if (ut) {
- ut->uu_sig &= ~bit;
+ struct uthread * uth;
+ thread_act_t thact;
+
+ signal_lock(p);
+
+ if ((p->p_flag & P_INVFORK) && p->p_vforkact) {
+ thact = p->p_vforkact;
+ uth = (struct uthread *)get_bsdthread_info(thact);
+ if (uth) {
+ uth->uu_siglist &= ~bit;
+ }
+ p->p_siglist &= ~bit;
+ signal_unlock(p);
+ return(0);
+ }
+
+ TAILQ_FOREACH(uth, &p->p_uthlist, uu_list) {
+ uth->uu_siglist &= ~bit;
}
+ p->p_siglist &= ~bit;
+ signal_unlock(p);
+ return(0);
}
int
-clear_sigbits (struct proc *p, int bit)
+unblock_procsigmask(struct proc *p, int bit)
{
-task_t task = p->task;
+ struct uthread * uth;
+ thread_act_t thact;
- p->p_siglist &= ~(bit);
- task_act_iterate_wth_args(task, reset_sigbits, bit);
+ signal_lock(p);
+ if ((p->p_flag & P_INVFORK) && p->p_vforkact) {
+ thact = p->p_vforkact;
+ uth = (struct uthread *)get_bsdthread_info(thact);
+ if (uth) {
+ uth->uu_sigmask &= ~bit;
+ }
+ p->p_sigmask &= ~bit;
+ signal_unlock(p);
+ return(0);
+ }
+ TAILQ_FOREACH(uth, &p->p_uthlist, uu_list) {
+ uth->uu_sigmask &= ~bit;
+ }
+ p->p_sigmask &= ~bit;
+ signal_unlock(p);
return(0);
}
-void
+int
+block_procsigmask(struct proc *p, int bit)
+{
+ struct uthread * uth;
+ thread_act_t thact;
+
+ signal_lock(p);
+ if ((p->p_flag & P_INVFORK) && p->p_vforkact) {
+ thact = p->p_vforkact;
+ uth = (struct uthread *)get_bsdthread_info(thact);
+ if (uth) {
+ uth->uu_sigmask |= bit;
+ }
+ p->p_sigmask |= bit;
+ signal_unlock(p);
+ return(0);
+ }
+ TAILQ_FOREACH(uth, &p->p_uthlist, uu_list) {
+ uth->uu_sigmask |= bit;
+ }
+ p->p_sigmask |= bit;
+ signal_unlock(p);
+ return(0);
+}
+int
+set_procsigmask(struct proc *p, int bit)
+{
+ struct uthread * uth;
+ thread_act_t thact;
+
+ signal_lock(p);
+ if ((p->p_flag & P_INVFORK) && p->p_vforkact) {
+ thact = p->p_vforkact;
+ uth = (struct uthread *)get_bsdthread_info(thact);
+ if (uth) {
+ uth->uu_sigmask = bit;
+ }
+ p->p_sigmask = bit;
+ signal_unlock(p);
+ return(0);
+ }
+ TAILQ_FOREACH(uth, &p->p_uthlist, uu_list) {
+ uth->uu_sigmask = bit;
+ }
+ p->p_sigmask = bit;
+ signal_unlock(p);
+ return(0);
+}
+
+int
setsigvec(p, signum, sa)
register struct proc *p;
int signum;
- register struct sigaction *sa;
+ register struct __sigaction *sa;
{
register struct sigacts *ps = p->p_sigacts;
register int bit;
+ if ((signum == SIGKILL || signum == SIGSTOP) &&
+ sa->sa_handler != SIG_DFL)
+ return(EINVAL);
bit = sigmask(signum);
/*
* Change setting atomically.
*/
ps->ps_sigact[signum] = sa->sa_handler;
+ ps->ps_trampact[signum] = (sig_t) sa->sa_tramp;
ps->ps_catchmask[signum] = sa->sa_mask &~ sigcantmask;
+ if (sa->sa_flags & SA_SIGINFO)
+ ps->ps_siginfo |= bit;
+ else
+ ps->ps_siginfo &= ~bit;
+ if (sa->sa_flags & SA_64REGSET)
+ ps->ps_64regset |= bit;
+ else
+ ps->ps_64regset &= ~bit;
if ((sa->sa_flags & SA_RESTART) == 0)
ps->ps_sigintr |= bit;
else
ps->ps_usertramp |= bit;
else
ps->ps_usertramp &= ~bit;
+ if (sa->sa_flags & SA_RESETHAND)
+ ps->ps_sigreset |= bit;
+ else
+ ps->ps_sigreset &= ~bit;
+ if (sa->sa_flags & SA_NODEFER)
+ ps->ps_signodefer |= bit;
+ else
+ ps->ps_signodefer &= ~bit;
if (signum == SIGCHLD) {
if (sa->sa_flags & SA_NOCLDSTOP)
p->p_flag |= P_NOCLDSTOP;
else
p->p_flag &= ~P_NOCLDSTOP;
+ if ((sa->sa_flags & SA_NOCLDWAIT) || (sa->sa_handler == SIG_IGN))
+ p->p_flag |= P_NOCLDWAIT;
+ else
+ p->p_flag &= ~P_NOCLDWAIT;
+ }
+
+#ifdef __ppc__
+ if (signum == SIGFPE) {
+ if (sa->sa_handler == SIG_DFL || sa->sa_handler == SIG_IGN)
+ thread_enable_fpe(current_act(), 0);
+ else
+ thread_enable_fpe(current_act(), 1);
}
+#endif /* __ppc__ */
/*
* Set bit in p_sigignore for signals that are set to SIG_IGN,
* and for signals set to SIG_DFL where the default is to ignore.
*/
if (sa->sa_handler == SIG_IGN ||
(sigprop[signum] & SA_IGNORE && sa->sa_handler == SIG_DFL)) {
- p->p_siglist &= ~bit; /* never to be seen again */
- /*
- * If this is a thread signal, clean out the
- * threads as well.
- */
- if (bit & threadmask) {
- register task_t task = p->task;
- task_act_iterate_wth_args(task, reset_sigbits, bit);
- }
+ clear_procsiglist(p, bit);
if (signum != SIGCONT)
p->p_sigignore |= bit; /* easier in psignal */
p->p_sigcatch &= ~bit;
else
p->p_sigcatch |= bit;
}
+ return(0);
}
/*
* Reset signals for an exec of the specified process.
*/
void
-execsigs(p)
+execsigs(p, thr_act)
register struct proc *p;
+ register thread_act_t thr_act;
{
register struct sigacts *ps = p->p_sigacts;
register int nc, mask;
+ struct uthread *ut;
/*
* Reset caught signals. Held signals remain held
if (sigprop[nc] & SA_IGNORE) {
if (nc != SIGCONT)
p->p_sigignore |= mask;
- p->p_siglist &= ~mask;
+ if (thr_act){
+ ut = (struct uthread *)get_bsdthread_info(thr_act);
+ ut->uu_siglist &= ~mask;
+ p->p_siglist &= ~mask;
+ } else
+ clear_procsiglist(p, mask);
}
ps->ps_sigact[nc] = SIG_DFL;
}
*/
struct sigprocmask_args {
int how;
- sigset_t mask;
+ sigset_t *mask;
+ sigset_t * omask;
};
int
sigprocmask(p, uap, retval)
register_t *retval;
{
int error = 0;
+ sigset_t oldmask, nmask;
+ sigset_t * omask = uap->omask;
+ struct uthread *ut;
- *retval = p->p_sigmask;
+ ut = (struct uthread *)get_bsdthread_info(current_act());
+ oldmask = ut->uu_sigmask;
+
+ if (uap->mask == (sigset_t *)0) {
+ /* just want old mask */
+ goto out;
+ }
+ error = copyin((caddr_t)uap->mask, &nmask, sizeof(sigset_t));
+ if (error)
+ goto out;
switch (uap->how) {
case SIG_BLOCK:
- p->p_sigmask |= uap->mask &~ sigcantmask;
+ block_procsigmask(p, (nmask & ~sigcantmask));
+ signal_setast(current_act());
break;
case SIG_UNBLOCK:
- p->p_sigmask &= ~(uap->mask);
+ unblock_procsigmask(p, (nmask & ~sigcantmask));
signal_setast(current_act());
break;
case SIG_SETMASK:
- p->p_sigmask = uap->mask &~ sigcantmask;
+ set_procsigmask(p, (nmask & ~sigcantmask));
signal_setast(current_act());
break;
error = EINVAL;
break;
}
+out:
+ if (!error && omask)
+ copyout(&oldmask, omask, sizeof(sigset_t));
return (error);
}
-/* ARGSUSED */
+struct sigpending_args {
+ struct sigvec *osv;
+};
int
sigpending(p, uap, retval)
struct proc *p;
- void *uap;
+ register struct sigpending_args *uap;
register_t *retval;
{
+ struct uthread *ut;
+ sigset_t pendlist;
- *retval = p->p_siglist;
- return (0);
+ ut = (struct uthread *)get_bsdthread_info(current_act());
+ pendlist = ut->uu_siglist;
+
+ if (uap->osv)
+ copyout(&pendlist, uap->osv, sizeof(sigset_t));
+ return(0);
}
#if COMPAT_43
register struct osigvec_args *uap;
register_t *retval;
{
+ struct sigvec __vec;
struct sigvec vec;
register struct sigacts *ps = p->p_sigacts;
register struct sigvec *sv;
register int signum;
- int bit, error;
+ int bit, error=0;
+#if 0
signum = uap->signum;
if (signum <= 0 || signum >= NSIG ||
signum == SIGKILL || signum == SIGSTOP)
sizeof (vec)))
return (error);
sv->sv_flags ^= SA_RESTART; /* opposite of SV_INTERRUPT */
- setsigvec(p, signum, (struct sigaction *)sv);
+ error = setsigvec(p, signum, (struct sigaction *)sv);
}
- return (0);
+#else
+error = ENOSYS;
+#endif
+ return (error);
}
struct osigblock_args {
struct osigblock_args *uap;
register_t *retval;
{
+ struct uthread * uth = get_bsdthread_info(current_act());
- *retval = p->p_sigmask;
- p->p_sigmask |= uap->mask &~ sigcantmask;
+ *retval = uth->uu_sigmask;
+ uth->uu_sigmask |= (uap->mask & ~sigcantmask);
return (0);
}
struct osigsetmask_args *uap;
register_t *retval;
{
+ struct uthread * uth = get_bsdthread_info(current_act());
- *retval = p->p_sigmask;
- p->p_sigmask = uap->mask &~ sigcantmask;
+ *retval = uth->uu_sigmask;
+ uth->uu_sigmask = (uap->mask & ~sigcantmask);
return (0);
}
#endif /* COMPAT_43 */
int
sigcontinue(error)
{
+ struct uthread *ut = get_bsdthread_info(current_act());
unix_syscall_return(EINTR);
}
struct sigsuspend_args {
- int mask;
+ sigset_t mask;
};
/* ARGSUSED */
register_t *retval;
{
register struct sigacts *ps = p->p_sigacts;
+ struct uthread *ut;
+
+ ut = (struct uthread *)get_bsdthread_info(current_act());
/*
* When returning from sigpause, we want
* save it here and mark the sigacts structure
* to indicate this.
*/
- ps->ps_oldmask = p->p_sigmask;
- ps->ps_flags |= SAS_OLDMASK;
- p->p_sigmask = uap->mask &~ sigcantmask;
+ ut->uu_oldmask = ut->uu_sigmask;
+ ut->uu_flag |= USAS_OLDMASK;
+ ut->uu_sigmask = (uap->mask & ~sigcantmask);
(void) tsleep0((caddr_t) p, PPAUSE|PCATCH, "pause", 0, sigcontinue);
/* always return EINTR rather than ERESTART... */
return (EINTR);
}
+struct __disable_thsignal_args {
+ int value;
+};
+
+int
+__disable_threadsignal(p, uap, retval)
+ struct proc *p;
+ register struct __disable_thsignal_args *uap;
+ register_t *retval;
+{
+ struct uthread *uth;
+
+ uth = (struct uthread *)get_bsdthread_info(current_act());
+
+ /* No longer valid to have any signal delivered */
+ signal_lock(p);
+ uth->uu_flag |= UNO_SIGMASK;
+ signal_unlock(p);
+
+ return(0);
+
+}
+
+struct pthread_kill_args {
+ void * thread_port;
+ int sig;
+};
+
+int
+__pthread_kill(p, uap, retval)
+ struct proc *p;
+ register struct pthread_kill_args *uap;
+ register_t *retval;
+{
+ thread_act_t target_act;
+ int error = 0;
+ int signum = uap->sig;
+ struct uthread *uth;
+
+ target_act = (thread_act_t)port_name_to_act(uap->thread_port);
+
+ if (target_act == THR_ACT_NULL)
+ return (ESRCH);
+ if ((u_int)signum >= NSIG) {
+ error = EINVAL;
+ goto out;
+ }
+
+ uth = (struct uthread *)get_bsdthread_info(target_act);
+
+ if (uth->uu_flag & UNO_SIGMASK) {
+ error = ESRCH;
+ goto out;
+ }
+
+ if (signum)
+ psignal_uthread(target_act, signum);
+out:
+ act_deallocate(target_act);
+ return (error);
+}
+
+
+struct pthread_sigmask_args {
+ int how;
+ const sigset_t *set;
+ sigset_t * oset;
+};
+int
+pthread_sigmask(p, uap, retval)
+ register struct proc *p;
+ register struct pthread_sigmask_args *uap;
+ register_t *retval;
+{
+ int how = uap->how;
+ const sigset_t *set = uap->set;
+ sigset_t * oset = uap->oset;
+ const sigset_t nset;
+ int error = 0;
+ struct uthread *ut;
+ sigset_t oldset;
+
+ ut = (struct uthread *)get_bsdthread_info(current_act());
+ oldset = ut->uu_sigmask;
+
+ if (set == (sigset_t *) 0) {
+ /* need only old mask */
+ goto out;
+ }
+
+ error = copyin((caddr_t)set, (caddr_t)&nset, sizeof(sigset_t));
+ if (error)
+ goto out;
+
+ switch (uap->how) {
+ case SIG_BLOCK:
+ ut->uu_sigmask |= (nset & ~sigcantmask);
+ break;
+
+ case SIG_UNBLOCK:
+ ut->uu_sigmask &= ~(nset);
+ signal_setast(current_act());
+ break;
+
+ case SIG_SETMASK:
+ ut->uu_sigmask = (nset & ~sigcantmask);
+ signal_setast(current_act());
+ break;
+
+ default:
+ error = EINVAL;
+
+ }
+out:
+ if (!error && oset)
+ copyout((caddr_t)&oldset, (caddr_t)oset, sizeof(sigset_t));
+
+ return(error);
+}
+
+
+struct sigwait_args {
+ const sigset_t *set;
+ int *sig;
+};
+
+int
+sigwait(p, uap, retval)
+ register struct proc *p;
+ register struct sigwait_args *uap;
+ register_t *retval;
+{
+ register struct sigacts *ps = p->p_sigacts;
+ struct uthread *ut;
+ struct uthread *uth;
+ thread_act_t thact;
+ int error = 0;
+ sigset_t mask;
+ sigset_t siglist;
+ sigset_t sigw=0;
+ int signum;
+
+ ut = (struct uthread *)get_bsdthread_info(current_act());
+
+ if (uap->set == (const sigset_t *)0)
+ return(EINVAL);
+
+ error = copyin((caddr_t)uap->set, (caddr_t)&mask, sizeof(sigset_t));
+ if (error)
+ return(error);
+
+ siglist = (mask & ~sigcantmask);
+
+ if (siglist == 0)
+ return(EINVAL);
+
+ signal_lock(p);
+ if ((p->p_flag & P_INVFORK) && p->p_vforkact) {
+ signal_unlock(p);
+ return(EINVAL);
+ } else {
+ TAILQ_FOREACH(uth, &p->p_uthlist, uu_list) {
+ if (sigw = uth->uu_siglist & siglist) {
+ break;
+ }
+ }
+ }
+ signal_unlock(p);
+ if (sigw) {
+ /* The signal was pending on a thread */
+ goto sigwait1;
+ }
+ /*
+ * When returning from sigwait, we want
+ * the old mask to be restored after the
+ * signal handler has finished. Thus, we
+ * save it here and mark the sigacts structure
+ * to indicate this.
+ */
+ ut->uu_oldmask = ut->uu_sigmask;
+ ut->uu_flag |= USAS_OLDMASK;
+ if (siglist == (sigset_t)0)
+ return(EINVAL);
+ /* SIGKILL and SIGSTOP are not maskable as well */
+ ut->uu_sigmask = ~(siglist|sigcantmask);
+ ut->uu_sigwait = siglist;
+ /* No Continuations for now */
+ error = tsleep((caddr_t)&ut->uu_sigwait, PPAUSE|PCATCH, "pause", 0);
+
+ if ((error == EINTR) || (error == ERESTART))
+ error = 0;
+
+ sigw = (ut->uu_sigwait & siglist);
+ ut->uu_sigmask = ut->uu_oldmask;
+ ut->uu_oldmask = 0;
+ ut->uu_flag &= ~USAS_OLDMASK;
+sigwait1:
+ ut->uu_sigwait = 0;
+ if (!error) {
+ signum = ffs((unsigned int)sigw);
+ if (!signum)
+ panic("sigwait with no signal wakeup");
+ ut->uu_siglist &= ~(sigmask(signum));
+ if (uap->sig)
+ error = copyout(&signum, uap->sig, sizeof(int));
+ }
+
+ return(error);
+
+}
+
#if COMPAT_43
struct osigstack_args {
struct sigstack *nss;
struct sigstack *oss;
};
+
/* ARGSUSED */
int
osigstack(p, uap, retval)
if (error = copyin((caddr_t)uap->nss, (caddr_t)&ss,
sizeof (ss)))
return (error);
+ if ((ss.ss_flags & ~SA_DISABLE) != 0) {
+ return(EINVAL);
+ }
+
if (ss.ss_flags & SA_DISABLE) {
if (psp->ps_sigstk.ss_flags & SA_ONSTACK)
return (EINVAL);
psp->ps_sigstk.ss_flags = ss.ss_flags;
return (0);
}
- if (ss.ss_size < MINSIGSTKSZ)
+/* The older stacksize was 8K, enforce that one so no compat problems */
+#define OLDMINSIGSTKSZ 8*1024
+ if (ss.ss_size < OLDMINSIGSTKSZ)
return (ENOMEM);
psp->ps_flags |= SAS_ALTSTACK;
psp->ps_sigstk= ss;
register struct proc *p;
register struct pcred *pc = cp->p_cred;
+ AUDIT_ARG(pid, uap->pid);
+ AUDIT_ARG(signum, uap->signum);
if ((u_int)uap->signum >= NSIG)
return (EINVAL);
if (uap->pid > 0) {
/* kill single process */
- if ((p = pfind(uap->pid)) == NULL)
+ if ((p = pfind(uap->pid)) == NULL) {
+ if ((p = pzfind(uap->pid)) != NULL) {
+ /*
+ * IEEE Std 1003.1-2001: return success
+ * when killing a zombie.
+ */
+ return (0);
+ }
return (ESRCH);
+ }
+ AUDIT_ARG(process, p);
if (!cansignal(cp, pc, p, uap->signum))
return (EPERM);
if (uap->signum)
register_t *retval;
{
+ AUDIT_ARG(pid, uap->pgid);
+ AUDIT_ARG(signum, uap->signum);
if ((u_int)uap->signum >= NSIG)
return (EINVAL);
return (killpg1(p, uap->signum, uap->pgid, 0));
psignal(p, signum);
}
+/*
+ * Send signal to a backgrounded process blocked due to tty access
+ * In FreeBSD, the backgrounded process wakes up every second and
+ * discovers whether it is foregounded or not. In our case, we block
+ * the thread in tsleep as we want to avoid storm of processes as well
+ * as the suspend is only at AST level
+ */
+void
+tty_pgsignal(pgrp, signum)
+ struct pgrp *pgrp;
+ int signum;
+{
+ register struct proc *p;
+
+ if (pgrp)
+ for (p = pgrp->pg_members.lh_first; p != 0;
+ p = p->p_pglist.le_next)
+ if ((p->p_flag & P_TTYSLEEP) && (p->p_flag & P_CONTROLT))
+ psignal(p, signum);
+}
+
/*
* Send a signal caused by a trap to a specific thread.
*/
void
threadsignal(sig_actthread, signum, code)
- register thread_act_t *sig_actthread;
+ register thread_act_t sig_actthread;
register int signum;
u_long code;
{
if (!(p->p_flag & P_TRACED) && (p->p_sigignore & mask))
return;
- uth->uu_sig |= mask;
+ uth->uu_siglist |= mask;
+ p->p_siglist |= mask; /* just for lame ones looking here */
uth->uu_code = code;
/* mark on process as well */
- p->p_siglist |= mask;
signal_setast(sig_actthread);
}
-void
-psignal_pend(p)
- register struct proc *p;
-{
- boolean_t funnel_state;
- register int sigbits, mask, signum;
-
- thread_funnel_set(kernel_flock, TRUE);
-
- if (p->p_sigpending == 0)
- return;
-
-
- signal_lock(p);
-
- for (;;) {
- sigbits = p->p_sigpending;
- if (sigbits == 0)
- goto out;
- signum = ffs((long)sigbits);
- mask = sigmask(signum);
- p->p_sigpending &= ~mask;
-
- psignal_lock(p, signum, 0, 0);
-
- }
-out:
- p->p_flag &= ~P_SIGTHR;
- signal_unlock(p);
- thread_funnel_set(kernel_flock, FALSE);
-}
-
void
psignal(p, signum)
register struct proc *p;
register int signum;
{
- psignal_lock(p, signum, 1, 1);
+ psignal_lock(p, signum, 1);
}
-
void
psignal_vfork(p, new_task, thr_act, signum)
register struct proc *p;
register sig_t action;
int mask;
kern_return_t kret;
+ struct uthread *uth;
if ((u_int)signum >= NSIG || signum == 0)
panic("psignal signal number");
return;
+ uth = get_bsdthread_info(thr_act);
signal_lock(p);
/*
(p->p_flag & P_TRACED) == 0)
p->p_nice = NZERO;
- if (prop & SA_CONT)
+ if (prop & SA_CONT) {
p->p_siglist &= ~stopsigmask;
+ uth->uu_siglist &= ~stopsigmask;
+ }
if (prop & SA_STOP) {
/*
if (prop & SA_TTYSTOP && p->p_pgrp->pg_jobc == 0 &&
action == SIG_DFL)
goto psigout;
+ uth->uu_siglist &= ~contsigmask;
p->p_siglist &= ~contsigmask;
}
- p->p_siglist |= mask;
+ uth->uu_siglist |= mask;
+ p->p_siglist |= mask; /* just for lame ones looking here */
- /* Deliver signal to the activation passed in */
- thread_ast_set(thr_act, AST_BSD);
+ /* Deliver signal to the activation passed in */
+ act_set_astbsd(thr_act);
/*
* SIGKILL priority twiddling moved here from above because
*/
if ((signum == SIGKILL) && (p->p_nice > NZERO)) {
p->p_nice = NZERO;
-#if XXX
- /*
- * we need to make changes here to get nice to work
- * reset priority to BASEPRI_USER
- */
-#endif
}
/*
* while we were stopped), check for a signal from the debugger.
*/
if (p->p_stat == SSTOP) {
- if ((p->p_flag & P_TRACED) != 0 && p->p_xstat != 0)
- p->p_siglist |= sigmask(p->p_xstat);
+ if ((p->p_flag & P_TRACED) != 0 && p->p_xstat != 0) {
+ uth->uu_siglist |= sigmask(p->p_xstat);
+ p->p_siglist |= mask; /* just for lame ones looking here */
+ }
}
/*
signal_unlock(p);
}
-/*
- * Send the signal to the process. If the signal has an action, the action
- * is usually performed by the target process rather than the caller; we add
- * the signal to the set of pending signals for the process.
+thread_act_t
+get_signalthread(struct proc *p, int signum)
+{
+ struct uthread *uth;
+ thread_act_t thr_act;
+ sigset_t mask = sigmask(signum);
+ thread_act_t sig_thread_act;
+ struct task * sig_task = p->task;
+ kern_return_t kret;
+
+ if ((p->p_flag & P_INVFORK) && p->p_vforkact) {
+ sig_thread_act = p->p_vforkact;
+ kret = check_actforsig(sig_task, sig_thread_act, 1);
+ if (kret == KERN_SUCCESS)
+ return(sig_thread_act);
+ else
+ return(THR_ACT_NULL);
+ }
+
+ TAILQ_FOREACH(uth, &p->p_uthlist, uu_list) {
+ if(((uth->uu_flag & UNO_SIGMASK)== 0) &&
+ (((uth->uu_sigmask & mask) == 0) || (uth->uu_sigwait & mask))) {
+ if (check_actforsig(p->task, uth->uu_act, 1) == KERN_SUCCESS)
+ return(uth->uu_act);
+ }
+ }
+ if (get_signalact(p->task, &thr_act, 1) == KERN_SUCCESS) {
+ return(thr_act);
+ }
+
+ return(THR_ACT_NULL);
+}
+
+/*
+ * Send the signal to the process. If the signal has an action, the action
+ * is usually performed by the target process rather than the caller; we add
+ * the signal to the set of pending signals for the process.
*
* Exceptions:
* o When a stop signal is sent to a sleeping process that takes the
* Other ignored signals are discarded immediately.
*/
void
-psignal_lock(p, signum, withlock, pend)
+psignal_lock(p, signum, withlock)
register struct proc *p;
register int signum;
register int withlock;
- register int pend;
{
register int s, prop;
register sig_t action;
thread_act_t sig_thread_act;
- thread_t sig_thread;
register task_t sig_task;
- register thread_t cur_thread;
- thread_act_t *cur_act;
int mask;
+ struct uthread *uth;
kern_return_t kret;
int sw_funnel = 0;
return;
}
+ s = splhigh();
+ KNOTE(&p->p_klist, NOTE_SIGNAL | signum);
+ splx(s);
+
/*
* do not send signals to the process that has the thread
* doing a reboot(). Not doing so will mark that thread aborted
return;
}
- /*
- * if the traced process is blocked waiting for
- * gdb then do not block the caller just pend
- * the signal. Setup a callout to process the
- * pended signal if not alreadu set
+ if (withlock)
+ signal_lock(p);
+
+ /*
+ * Deliver the signal to the first thread in the task. This
+ * allows single threaded applications which use signals to
+ * be able to be linked with multithreaded libraries. We have
+ * an implicit reference to the current thread, but need
+ * an explicit one otherwise. The thread reference keeps
+ * the corresponding task data structures around too. This
+ * reference is released by thread_deallocate.
*/
- if (pend && (p->p_flag & P_TRACED) && p->sigwait) {
- p->p_sigpending |= mask;
- if (!(p->p_flag & P_SIGTHR)) {
- p->p_flag |= P_SIGTHR;
- thread_call_func((thread_call_func_t)psignal_pend, p,
- FALSE);
- }
- if (sw_funnel)
- thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
- return;
+
+ if (((p->p_flag & P_TRACED) == 0) && (p->p_sigignore & mask))
+ goto psigout;
+
+ /* If successful return with ast set */
+ sig_thread_act = get_signalthread(p, signum);
+
+ if (sig_thread_act == THR_ACT_NULL) {
+ /* XXXX FIXME
+ /* if it is sigkill, may be we should
+ * inject a thread to terminate
+ */
+#if SIGNAL_DEBUG
+ ram_printf(1);
+#endif /* SIGNAL_DEBUG */
+ goto psigout;
}
- if (withlock)
- signal_lock(p);
+ uth = get_bsdthread_info(sig_thread_act);
/*
* If proc is traced, always give parent a chance.
*/
if (p->p_sigignore & mask)
goto psigout;
- if (p->p_sigmask & mask)
+ if (uth->uu_sigwait & mask)
+ action = SIG_WAIT;
+ if (uth->uu_sigmask & mask)
action = SIG_HOLD;
else if (p->p_sigcatch & mask)
action = SIG_CATCH;
(p->p_flag & P_TRACED) == 0)
p->p_nice = NZERO;
- if (prop & SA_CONT)
+ if (prop & SA_CONT) {
+ uth->uu_siglist &= ~stopsigmask;
p->p_siglist &= ~stopsigmask;
+ }
if (prop & SA_STOP) {
/*
if (prop & SA_TTYSTOP && p->p_pgrp->pg_jobc == 0 &&
action == SIG_DFL)
goto psigout;
+ uth->uu_siglist &= ~contsigmask;
p->p_siglist &= ~contsigmask;
}
- p->p_siglist |= mask;
+ uth->uu_siglist |= mask;
+ p->p_siglist |= mask; /* just for lame ones looking here */
+
/*
* Defer further processing for signals which are held,
* except that stopped processes must be continued by SIGCONT.
*/
- if (action == SIG_HOLD && ((prop & SA_CONT) == 0 || p->p_stat != SSTOP))
+ if (action == SIG_HOLD && ((prop & SA_CONT) == 0 || p->p_stat != SSTOP)) {
goto psigout;
-
+ }
+ /*
+ * SIGKILL priority twiddling moved here from above because
+ * it needs sig_thread. Could merge it into large switch
+ * below if we didn't care about priority for tracing
+ * as SIGKILL's action is always SIG_DFL.
+ */
+ if ((signum == SIGKILL) && (p->p_nice > NZERO)) {
+ p->p_nice = NZERO;
+ }
+
+ /*
+ * Process is traced - wake it up (if not already
+ * stopped) so that it can discover the signal in
+ * issig() and stop for the parent.
+ */
+ if (p->p_flag & P_TRACED) {
+ if (p->p_stat != SSTOP)
+ goto run;
+ else
+ goto psigout;
+ }
+
+ if (action == SIG_WAIT) {
+ uth->uu_sigwait = mask;
+ uth->uu_siglist &= ~mask;
+ p->p_siglist &= ~mask;
+ wakeup(&uth->uu_sigwait);
+ /* if it is SIGCONT resume whole process */
+ if (prop & SA_CONT)
+ (void) task_resume(sig_task);
+ goto psigout;
+ }
+
+ if (action != SIG_DFL) {
+ /*
+ * User wants to catch the signal.
+ * Wake up the thread, but don't un-suspend it
+ * (except for SIGCONT).
+ */
+ if (prop & SA_CONT) {
+ if (p->p_flag & P_TTYSLEEP) {
+ p->p_flag &= ~P_TTYSLEEP;
+ wakeup(&p->p_siglist);
+ } else {
+ (void) task_resume(sig_task);
+ }
+ p->p_stat = SRUN;
+ } else if (p->p_stat == SSTOP)
+ goto psigout;
+ goto run;
+ } else {
+ /* Default action - varies */
+ if (mask & stopsigmask) {
+ /*
+ * These are the signals which by default
+ * stop a process.
+ *
+ * Don't clog system with children of init
+ * stopped from the keyboard.
+ */
+ if (!(prop & SA_STOP) && p->p_pptr == initproc) {
+ psignal_lock(p, SIGKILL, 0);
+ uth->uu_siglist &= ~mask;
+ p->p_siglist &= ~mask;
+ goto psigout;
+ }
+
+ /*
+ * Stop the task
+ * if task hasn't already been stopped by
+ * a signal.
+ */
+ uth->uu_siglist &= ~mask;
+ p->p_siglist &= ~mask;
+ if (p->p_stat != SSTOP) {
+ p->p_xstat = signum;
+ stop(p);
+ if ((p->p_pptr->p_flag & P_NOCLDSTOP) == 0) {
+ struct proc *pp = p->p_pptr;
+
+ pp->si_pid = p->p_pid;
+ pp->si_status = p->p_xstat;
+ pp->si_code = CLD_STOPPED;
+ pp->si_uid = p->p_cred->p_ruid;
+ psignal(pp, SIGCHLD);
+ }
+ }
+ goto psigout;
+ }
+
+ switch (signum) {
+ /*
+ * Signals ignored by default have been dealt
+ * with already, since their bits are on in
+ * p_sigignore.
+ */
+
+ case SIGKILL:
+ /*
+ * Kill signal always sets process running and
+ * unsuspends it.
+ */
+ /*
+ * Process will be running after 'run'
+ */
+ p->p_stat = SRUN;
+
+ thread_abort(sig_thread_act);
+
+ goto psigout;
+
+ case SIGCONT:
+ /*
+ * Let the process run. If it's sleeping on an
+ * event, it remains so.
+ */
+ if (p->p_flag & P_TTYSLEEP) {
+ p->p_flag &= ~P_TTYSLEEP;
+ wakeup(&p->p_siglist);
+ } else {
+ (void) task_resume(sig_task);
+ }
+ uth->uu_siglist &= ~mask;
+ p->p_siglist &= ~mask;
+ p->p_stat = SRUN;
+
+ goto psigout;
+
+ default:
+ /*
+ * All other signals wake up the process, but don't
+ * resume it.
+ */
+ if (p->p_stat == SSTOP)
+ goto psigout;
+ goto run;
+ }
+ }
+ /*NOTREACHED*/
+run:
+ /*
+ * If we're being traced (possibly because someone attached us
+ * while we were stopped), check for a signal from the debugger.
+ */
+ if (p->p_stat == SSTOP) {
+ if ((p->p_flag & P_TRACED) != 0 && p->p_xstat != 0)
+ uth->uu_siglist |= sigmask(p->p_xstat);
+ } else {
+ /*
+ * setrunnable(p) in BSD and
+ * Wake up the thread if it is interruptible.
+ */
+ p->p_stat = SRUN;
+ thread_abort_safely(sig_thread_act);
+ }
+psigout:
+ if (withlock)
+ signal_unlock(p);
+ if (sw_funnel)
+ thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
+}
+
+
+/* psignal_lock(p, signum, withlock ) */
+void
+psignal_uthread(thr_act, signum)
+ thread_act_t thr_act;
+ int signum;
+{
+ struct proc *p;
+ register int s, prop;
+ register sig_t action;
+ thread_act_t sig_thread_act;
+ register task_t sig_task;
+ int mask;
+ struct uthread *uth;
+ kern_return_t kret;
+ int error = 0;
+
+ p = (struct proc *)get_bsdtask_info(get_threadtask(thr_act));
+ if ((u_int)signum >= NSIG || signum == 0)
+ panic("Invalid signal number in psignal_uthread");
+ mask = sigmask(signum);
+ prop = sigprop[signum];
+
+#if SIGNAL_DEBUG
+ if(rdebug_proc && (p == rdebug_proc)) {
+ ram_printf(3);
+ }
+#endif /* SIGNAL_DEBUG */
+
+ /*
+ * We will need the task pointer later. Grab it now to
+ * check for a zombie process. Also don't send signals
+ * to kernel internal tasks.
+ */
+ if (((sig_task = p->task) == TASK_NULL) || is_kerneltask(sig_task)) {
+ return;
+ }
+
+ sig_thread_act = thr_act;
+ /*
+ * do not send signals to the process that has the thread
+ * doing a reboot(). Not doing so will mark that thread aborted
+ * and can cause IO failures wich will cause data loss.
+ */
+ if (ISSET(p->p_flag, P_REBOOT)) {
+ return;
+ }
+
+ signal_lock(p);
+
/*
* Deliver the signal to the first thread in the task. This
* allows single threaded applications which use signals to
* be able to be linked with multithreaded libraries. We have
- * an implicit reference to the current_thread, but need
+ * an implicit reference to the current thread, but need
* an explicit one otherwise. The thread reference keeps
* the corresponding task data structures around too. This
* reference is released by thread_deallocate.
*/
- cur_thread = current_thread(); /* this is a shuttle */
- cur_act = current_act();
-
- if ((p->p_flag & P_INVFORK) && p->p_vforkact) {
- sig_thread_act = p->p_vforkact;
+ if (((p->p_flag & P_TRACED) == 0) && (p->p_sigignore & mask))
+ goto puthout;
- kret = check_actforsig(sig_task, sig_thread_act, &sig_thread, 1);
- if (kret == KERN_SUCCESS) {
- goto psig_foundthread;
- }
- }
+ kret = check_actforsig(sig_task, sig_thread_act, 1);
- /* If successful return with ast set */
- kret = (kern_return_t)get_signalact(sig_task,
- &sig_thread_act, &sig_thread, 1);
+ if (kret != KERN_SUCCESS) {
+ error = EINVAL;
+ goto puthout;
+ }
- if ((kret != KERN_SUCCESS) || (sig_thread_act == THREAD_NULL)) {
- /* XXXX FIXME
- /* if it is sigkill, may be we should
- * inject a thread to terminate
- */
-#if DIAGNOSTIC
- printf("WARNING: no activation in psignal\n");
-#endif
-#if SIGNAL_DEBUG
- ram_printf(1);
-#endif /* SIGNAL_DEBUG */
- goto psigout;
- }
-psig_foundthread:
- if (sig_thread == THREAD_NULL) {
-#if DIAGNOSTIC
- printf("WARNING: valid act; but no shutte in psignal\n");
-#endif
-#if 0
- /* FIXME : NO VALID SHUTTLE */
- goto psigout;
-#endif
+ uth = get_bsdthread_info(sig_thread_act);
+
+ /*
+ * If proc is traced, always give parent a chance.
+ */
+ if (p->p_flag & P_TRACED)
+ action = SIG_DFL;
+ else {
+ /*
+ * If the signal is being ignored,
+ * then we forget about it immediately.
+ * (Note: we don't set SIGCONT in p_sigignore,
+ * and if it is set to SIG_IGN,
+ * action will be SIG_DFL here.)
+ */
+ if (p->p_sigignore & mask)
+ goto puthout;
+ if (uth->uu_sigwait & mask)
+ action = SIG_WAIT;
+ if (uth->uu_sigmask & mask)
+ action = SIG_HOLD;
+ else if (p->p_sigcatch & mask)
+ action = SIG_CATCH;
+ else
+ action = SIG_DFL;
}
+ if (p->p_nice > NZERO && action == SIG_DFL && (prop & SA_KILL) &&
+ (p->p_flag & P_TRACED) == 0)
+ p->p_nice = NZERO;
+
+ if (prop & SA_CONT) {
+ uth->uu_siglist &= ~stopsigmask;
+ p->p_siglist &= ~stopsigmask;
+ }
+
+ if (prop & SA_STOP) {
+ /*
+ * If sending a tty stop signal to a member of an orphaned
+ * process group, discard the signal here if the action
+ * is default; don't stop the process below if sleeping,
+ * and don't clear any pending SIGCONT.
+ */
+ if (prop & SA_TTYSTOP && p->p_pgrp->pg_jobc == 0 &&
+ action == SIG_DFL)
+ goto puthout;
+ uth->uu_siglist &= ~contsigmask;
+ p->p_siglist &= ~contsigmask;
+ }
+ uth->uu_siglist |= mask;
+ p->p_siglist |= mask; /* just for lame ones looking here */
+
+ /*
+ * Defer further processing for signals which are held,
+ * except that stopped processes must be continued by SIGCONT.
+ */
+ if (action == SIG_HOLD && ((prop & SA_CONT) == 0 || p->p_stat != SSTOP))
+ goto puthout;
+
/*
* SIGKILL priority twiddling moved here from above because
* it needs sig_thread. Could merge it into large switch
*/
if ((signum == SIGKILL) && (p->p_nice > NZERO)) {
p->p_nice = NZERO;
-#if XXX
- /*
- * we need to make changes here to get nice to work
- * reset priority to BASEPRI_USER
- */
-#endif
}
/*
*/
if (p->p_flag & P_TRACED) {
if (p->p_stat != SSTOP)
- goto run;
+ goto psurun;
else
- goto psigout;
+ goto puthout;
+ }
+
+ if (action == SIG_WAIT) {
+ uth->uu_sigwait = mask;
+ uth->uu_siglist &= ~mask;
+ p->p_siglist &= ~mask;
+ wakeup(&uth->uu_sigwait);
+ /* if it is SIGCONT resume whole process */
+ if (prop & SA_CONT)
+ (void) task_resume(sig_task);
+ goto puthout;
}
if (action != SIG_DFL) {
*/
if (prop & SA_CONT)
(void) task_resume(sig_task);
- goto run;
+ goto psurun;
} else {
/* Default action - varies */
if (mask & stopsigmask) {
* stopped from the keyboard.
*/
if (!(prop & SA_STOP) && p->p_pptr == initproc) {
- psignal_lock(p, SIGKILL, 0, 1);
+ psignal_lock(p, SIGKILL, 0);
+ uth->uu_siglist &= ~mask;
p->p_siglist &= ~mask;
- goto psigout;
+ goto puthout;
}
/*
- * Stop the task.
+ * Stop the task
+ * if task hasn't already been stopped by
+ * a signal.
*/
- if (!is_thread_running(sig_thread)) {
- /* Thread is not running
- * If task hasn't already been stopped by
- * a signal, stop it.
- */
- p->p_siglist &= ~mask;
- if (get_task_userstop(sig_task) == 0) {
- /*
- * p_cursig must not be set, because
- * it will be psig()'d if it is not
- * zero, and the signal is being
- * handled here. But save the signal
- * in p_stopsig so WUNTRACED
- * option to wait can find it.
- */
- p->p_xstat = signum;
- if ((p->p_pptr->p_flag & P_NOCLDSTOP) == 0)
- psignal(p->p_pptr, SIGCHLD);
- stop(p);
+ uth->uu_siglist &= ~mask;
+ p->p_siglist &= ~mask;
+ if (p->p_stat != SSTOP) {
+ p->p_xstat = signum;
+ if ((p->p_pptr->p_flag & P_NOCLDSTOP) == 0) {
+ struct proc *pp = p->p_pptr;
+
+ pp->si_pid = p->p_pid;
+ pp->si_status = p->p_xstat;
+ pp->si_code = CLD_STOPPED;
+ pp->si_uid = p->p_cred->p_ruid;
+ psignal(pp, SIGCHLD);
}
-#if 0
- /* unconditional check is bad */
- signal_clearast(sig_thread_act);
-#endif
- goto psigout;
- } else {
- if (p->p_stat != SZOMB)
- signal_setast(cur_act);
- goto psigout;
+ stop(p);
}
+ goto puthout;
}
switch (signum) {
thread_abort(sig_thread_act);
- goto psigout;
+ goto puthout;
case SIGCONT:
/*
} else {
(void) task_resume(sig_task);
}
+ uth->uu_siglist &= ~mask;
p->p_siglist &= ~mask;
p->p_stat = SRUN;
-#if 0
- /* do not clear AST as tcsh is sendig SIGTERM followed by
- * SIGCONT and the ast was getting cleared unconditinally
- * This is not right.
- */
- signal_clearast(sig_thread_act);
-#endif
- goto psigout;
+ goto puthout;
default:
/*
* All other signals wake up the process, but don't
* resume it.
*/
- goto run;
+ goto psurun;
}
}
/*NOTREACHED*/
-run:
+psurun:
/*
* If we're being traced (possibly because someone attached us
* while we were stopped), check for a signal from the debugger.
*/
if (p->p_stat == SSTOP) {
- if ((p->p_flag & P_TRACED) != 0 && p->p_xstat != 0)
+ if ((p->p_flag & P_TRACED) != 0 && p->p_xstat != 0) {
+ uth->uu_siglist |= sigmask(p->p_xstat);
p->p_siglist |= sigmask(p->p_xstat);
+ }
+ } else {
+ /*
+ * setrunnable(p) in BSD and
+ * Wake up the thread if it is interruptible.
+ */
+ p->p_stat = SRUN;
+ thread_abort_safely(sig_thread_act);
}
- /*
- * setrunnable(p) in BSD
- */
- p->p_stat = SRUN;
-
- /*
- * Wake up the thread if it is interruptible.
- */
- thread_abort_safely(sig_thread_act);
-psigout:
- if (withlock)
+puthout:
signal_unlock(p);
- if (sw_funnel)
- thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
}
+
__inline__ void
sig_lock_to_exit(
struct proc *p)
{
- thread_t self = current_thread();
+ thread_t self = current_act();
p->exit_thread = self;
(void) task_suspend(p->task);
sig_try_locked(
struct proc *p)
{
- thread_t self = current_thread();
+ thread_t self = current_act();
while (p->sigwait || p->exit_thread) {
if (p->exit_thread) {
/*
* Already exiting - no signals.
*/
- thread_abort(current_act());
+ thread_abort(self);
}
return(0);
}
(THREAD_INTERRUPTIBLE));
}
signal_unlock(p);
- thread_block(0);
+ thread_block(THREAD_CONTINUE_NULL);
signal_lock(p);
if (thread_should_abort(self)) {
/*
{
register int signum, mask, prop, sigbits;
task_t task = p->task;
- thread_t cur_thread;
thread_act_t cur_act;
int s;
struct uthread * ut;
kern_return_t kret;
+ struct proc *pp;
- cur_thread = current_thread();
cur_act = current_act();
+#if SIGNAL_DEBUG
+ if(rdebug_proc && (p == rdebug_proc)) {
+ ram_printf(3);
+ }
+#endif /* SIGNAL_DEBUG */
signal_lock(p);
-
/*
* Try to grab the signal lock.
*/
ut = get_bsdthread_info(cur_act);
for(;;) {
- sigbits = (ut->uu_sig |p->p_siglist) & ~p->p_sigmask;
+ sigbits = ut->uu_siglist & ~ut->uu_sigmask;
if (p->p_flag & P_PPWAIT)
sigbits &= ~stopsigmask;
mask = sigmask(signum);
prop = sigprop[signum];
- if (mask & threadmask) {
- /* we can take this signal */
- ut->uu_sig &= ~mask;
- }
-
/*
* We should see pending but ignored signals
* only if P_TRACED was on when they were posted.
*/
if (mask & p->p_sigignore && (p->p_flag & P_TRACED) == 0) {
+ ut->uu_siglist &= ~mask; /* take the signal! */
p->p_siglist &= ~mask; /* take the signal! */
continue;
}
- if (p->p_flag & P_TRACED && (p->p_flag & P_PPWAIT) == 0) {
+ if (p->p_flag & P_TRACED && (p->p_flag & P_PPWAIT) == 0) {
register int hold;
register task_t task;
/*
*/
/* ptrace debugging */
p->p_xstat = signum;
- psignal(p->p_pptr, SIGCHLD);
- /*
- * XXX Have to really stop for debuggers;
- * XXX stop() doesn't do the right thing.
- * XXX Inline the task_suspend because we
- * XXX have to diddle Unix state in the
- * XXX middle of it.
- */
- task = p->task;
- task_hold(task);
- p->sigwait = TRUE;
- p->sigwait_thread = cur_act;
- p->p_stat = SSTOP;
- p->p_flag &= ~P_WAITED;
- p->p_siglist &= ~mask; /* clear the old signal */
-
- wakeup((caddr_t)p->p_pptr);
- assert_wait((caddr_t)&p->sigwait, (THREAD_INTERRUPTIBLE));
- thread_block(0);
+ pp = p->p_pptr;
+ if (p->p_flag & P_SIGEXC) {
+ p->sigwait = TRUE;
+ p->sigwait_thread = cur_act;
+ p->p_stat = SSTOP;
+ p->p_flag &= ~P_WAITED;
+ ut->uu_siglist &= ~mask; /* clear the old signal */
+ p->p_siglist &= ~mask; /* clear the old signal */
+ signal_unlock(p);
+ do_bsdexception(EXC_SOFTWARE, EXC_SOFT_SIGNAL, signum);
+ signal_lock(p);
+ } else {
+// panic("Unsupportef gdb option \n");;
+ pp->si_pid = p->p_pid;
+ pp->si_status = p->p_xstat;
+ pp->si_code = CLD_TRAPPED;
+ pp->si_uid = p->p_cred->p_ruid;
+ psignal(pp, SIGCHLD);
+ /*
+ * XXX Have to really stop for debuggers;
+ * XXX stop() doesn't do the right thing.
+ * XXX Inline the task_suspend because we
+ * XXX have to diddle Unix state in the
+ * XXX middle of it.
+ */
+ task = p->task;
+ task_hold(task);
+ p->sigwait = TRUE;
+ p->sigwait_thread = cur_act;
+ p->p_stat = SSTOP;
+ p->p_flag &= ~P_WAITED;
+ ut->uu_siglist &= ~mask; /* clear the old signal */
+ p->p_siglist &= ~mask; /* clear the old signal */
+
+ wakeup((caddr_t)p->p_pptr);
+ signal_unlock(p);
+ assert_wait((caddr_t)&p->sigwait, (THREAD_INTERRUPTIBLE));
+ thread_block(THREAD_CONTINUE_NULL);
+ signal_lock(p);
+ }
+
p->sigwait = FALSE;
p->sigwait_thread = NULL;
wakeup((caddr_t)&p->sigwait_thread);
* pgsignal would get the SIGKILL to traced program
* That's what we are trying to see (I hope)
*/
- if (p->p_siglist & sigmask(SIGKILL)) {
+ if (ut->uu_siglist & sigmask(SIGKILL)) {
/*
* Wait event may still be outstanding;
* clear it, since sig_lock_to_exit will
* wait.
*/
- clear_wait(current_thread(), THREAD_INTERRUPTED);
+ clear_wait(current_act(), THREAD_INTERRUPTED);
sig_lock_to_exit(p);
/*
* Since this thread will be resumed
/*
* We may have to quit
*/
- if (thread_should_abort(current_thread())) {
+ if (thread_should_abort(current_act())) {
signal_unlock(p);
return(0);
}
* signal is being masked, look for other signals.
*/
mask = sigmask(signum);
- if (mask & threadmask)
- ut->uu_sig |= mask;
- else
- p->p_siglist |= mask;
- if (p->p_sigmask & mask)
+ ut->uu_siglist |= mask;
+ p->p_siglist |= mask; /* just for lame ones looking here */
+ if (ut->uu_sigmask & mask)
continue;
}
(p->p_pgrp->pg_jobc == 0 &&
prop & SA_TTYSTOP))
break; /* == ignore */
- p->p_xstat = signum;
- stop(p);
- if ((p->p_pptr->p_flag & P_NOCLDSTOP) == 0)
- psignal(p->p_pptr, SIGCHLD);
- thread_block(0);
- /*
- * We may have to quit
- */
- if (thread_should_abort(current_thread())) {
- signal_unlock(p);
- return(0);
+ if (p->p_stat != SSTOP) {
+ p->p_xstat = signum;
+ stop(p);
+ if ((p->p_pptr->p_flag & P_NOCLDSTOP) == 0) {
+ pp = p->p_pptr;
+ pp->si_pid = p->p_pid;
+ pp->si_status = p->p_xstat;
+ pp->si_code = CLD_STOPPED;
+ pp->si_uid = p->p_cred->p_ruid;
+ psignal(pp, SIGCHLD);
+ }
}
break;
} else if (prop & SA_IGNORE) {
*/
break; /* == ignore */
} else {
- p->p_siglist &= ~mask; /* take the signal! */
- p->p_sigpending &= ~mask; /* take the pending signal */
+ ut->uu_siglist &= ~mask; /* take the signal! */
+ p->p_siglist &= ~mask; /* take the signal! */
signal_unlock(p);
return (signum);
}
* This signal has an action, let
* postsig() process it.
*/
+ ut->uu_siglist &= ~mask; /* take the signal! */
p->p_siglist &= ~mask; /* take the signal! */
- p->p_sigpending &= ~mask; /* take the pending signal */
signal_unlock(p);
return (signum);
}
+ ut->uu_siglist &= ~mask; /* take the signal! */
p->p_siglist &= ~mask; /* take the signal! */
- p->p_sigpending &= ~mask; /* take the pending signal */
}
/* NOTREACHED */
}
{
register int signum, mask, prop, sigbits;
task_t task = p->task;
- thread_t cur_thread;
thread_act_t cur_act;
int s;
struct uthread * ut;
int retnum = 0;
- if (p->p_siglist == 0)
- return (0);
-
- if (((p->p_siglist & ~p->p_sigmask) == 0) && ((p->p_flag & P_TRACED) == 0))
- return (0);
- cur_thread = current_thread();
cur_act = current_act();
ut = get_bsdthread_info(cur_act);
- sigbits = (ut->uu_sig | p->p_siglist) & ~p->p_sigmask;
+ if (ut->uu_siglist == 0)
+ return (0);
+
+ if (((ut->uu_siglist & ~ut->uu_sigmask) == 0) && ((p->p_flag & P_TRACED) == 0))
+ return (0);
+
+ sigbits = ut->uu_siglist & ~ut->uu_sigmask;
for(;;) {
if (p->p_flag & P_PPWAIT)
* signal is being masked, look for other signals.
*/
mask = sigmask(signum);
- if (p->p_sigmask & mask)
+ if (ut->uu_sigmask & mask)
continue;
return(signum);
}
{
p->p_stat = SSTOP;
p->p_flag &= ~P_WAITED;
+ if (p->p_pptr->p_stat != SSTOP)
wakeup((caddr_t)p->p_pptr);
(void) task_suspend(p->task); /*XXX*/
}
register sig_t action;
u_long code;
int mask, returnmask;
+ struct uthread * ut;
#if DIAGNOSTIC
if (signum == 0)
* Try to grab the signal lock.
*/
if (sig_try_locked(p) <= 0) {
- signal_unlock(p);
+ signal_unlock(p);
return;
}
+ ut = (struct uthread *)get_bsdthread_info(current_act());
mask = sigmask(signum);
+ ut->uu_siglist &= ~mask;
p->p_siglist &= ~mask;
action = ps->ps_sigact[signum];
#if KTRACE
if (KTRPOINT(p, KTR_PSIG))
ktrpsig(p->p_tracep,
- signum, action, ps->ps_flags & SAS_OLDMASK ?
- ps->ps_oldmask : p->p_sigmask, 0);
+ signum, action, ut->uu_flag & USAS_OLDMASK ?
+ &ut->uu_oldmask : &ut->uu_sigmask, 0, -1);
#endif
if (action == SIG_DFL) {
/*
* If we get here, the signal must be caught.
*/
#if DIAGNOSTIC
- if (action == SIG_IGN || (p->p_sigmask & mask))
+ if (action == SIG_IGN || (ut->uu_sigmask & mask))
log(LOG_WARNING,
"postsig: processing masked or ignored signal\n");
#endif
* mask from before the sigpause is what we want
* restored after the signal processing is completed.
*/
- if (ps->ps_flags & SAS_OLDMASK) {
- returnmask = ps->ps_oldmask;
- ps->ps_flags &= ~SAS_OLDMASK;
+ if (ut->uu_flag & USAS_OLDMASK) {
+ returnmask = ut->uu_oldmask;
+ ut->uu_flag &= ~USAS_OLDMASK;
+ ut->uu_oldmask = 0;
} else
- returnmask = p->p_sigmask;
- p->p_sigmask |= ps->ps_catchmask[signum] | mask;
+ returnmask = ut->uu_sigmask;
+ ut->uu_sigmask |= ps->ps_catchmask[signum];
+ if ((ps->ps_signodefer & mask) == 0)
+ ut->uu_sigmask |= mask;
+ if ((signum != SIGILL) && (signum != SIGTRAP) && (ps->ps_sigreset & mask)) {
+ if ((signum != SIGCONT) && (sigprop[signum] & SA_IGNORE))
+ p->p_sigignore |= mask;
+ ps->ps_sigact[signum] = SIG_DFL;
+ ps->ps_siginfo &= ~mask;
+ ps->ps_signodefer &= ~mask;
+ }
+#ifdef __ppc__
+ /* Needs to disable to run in user mode */
+ if (signum == SIGFPE) {
+ thread_enable_fpe(current_act(), 0);
+ }
+#endif /* __ppc__ */
+
if (ps->ps_sig != signum) {
code = 0;
} else {
/* NOTREACHED */
}
+
+static int
+filt_sigattach(struct knote *kn)
+{
+ struct proc *p = current_proc();
+
+ kn->kn_ptr.p_proc = p;
+ kn->kn_flags |= EV_CLEAR; /* automatically set */
+
+ /* XXX lock the proc here while adding to the list? */
+ KNOTE_ATTACH(&p->p_klist, kn);
+
+ return (0);
+}
+
+static void
+filt_sigdetach(struct knote *kn)
+{
+ struct proc *p = kn->kn_ptr.p_proc;
+
+ KNOTE_DETACH(&p->p_klist, kn);
+}
+
+/*
+ * signal knotes are shared with proc knotes, so we apply a mask to
+ * the hint in order to differentiate them from process hints. This
+ * could be avoided by using a signal-specific knote list, but probably
+ * isn't worth the trouble.
+ */
+static int
+filt_signal(struct knote *kn, long hint)
+{
+
+ if (hint & NOTE_SIGNAL) {
+ hint &= ~NOTE_SIGNAL;
+
+ if (kn->kn_id == hint)
+ kn->kn_data++;
+ }
+ return (kn->kn_data != 0);
+}
+
void
bsd_ast(thread_act_t thr_act)
{
int signum;
unsigned int pc;
boolean_t funnel_state;
+ static bsd_init_done = 0;
if (p == NULL)
return;
p->p_flag &= ~P_OWEUPC;
}
- if (CHECK_SIGNALS(p, current_thread(), ut)) {
+ if (CHECK_SIGNALS(p, current_act(), ut)) {
while (signum = issignal(p))
postsig(signum);
}
- ast_off(AST_BSD);
+ if (!bsd_init_done) {
+ extern void bsdinit_task(void);
+
+ bsd_init_done = 1;
+ bsdinit_task();
+ }
(void) thread_funnel_set(kernel_flock, FALSE);
}
if (p == NULL)
return;
funnel_state = thread_funnel_set(kernel_flock, TRUE);
- psignal_lock(p, SIGVTALRM, 1, 1);
+ psignal_lock(p, SIGVTALRM, 1);
(void) thread_funnel_set(kernel_flock, FALSE);
}
if (p == NULL)
return;
funnel_state = thread_funnel_set(kernel_flock, TRUE);
- psignal_lock(p, SIGXCPU, 1, 1);
+ psignal_lock(p, SIGXCPU, 1);
(void) thread_funnel_set(kernel_flock, FALSE);
}
if (p == NULL)
return;
funnel_state = thread_funnel_set(kernel_flock, TRUE);
- psignal_lock(p, SIGPROF, 1, 1);
+ psignal_lock(p, SIGPROF, 1);
(void) thread_funnel_set(kernel_flock, FALSE);
}
}
}
}
+
+kern_return_t
+do_bsdexception(
+ int exc,
+ int code,
+ int sub)
+{
+ exception_data_type_t codes[EXCEPTION_CODE_MAX];
+ extern kern_return_t bsd_exception(int, exception_data_type_t codes[], int);
+
+ codes[0] = code;
+ codes[1] = sub;
+ return(bsd_exception(exc, codes, 2));
+}
+
projects / apple / xnu.git / blobdiff