diff options
author | kib <kib@FreeBSD.org> | 2014-12-03 10:42:10 +0000 |
---|---|---|
committer | kib <kib@FreeBSD.org> | 2014-12-03 10:42:10 +0000 |
commit | ec597a3d4ebed02aaab38affec52c269c45674fa (patch) | |
tree | 164cb8be8188e23709dc58235458f1f9543b5343 /sys/kern | |
parent | a0061de7746547291f771421d3d43d38ce4eaa22 (diff) | |
download | FreeBSD-src-ec597a3d4ebed02aaab38affec52c269c45674fa.zip FreeBSD-src-ec597a3d4ebed02aaab38affec52c269c45674fa.tar.gz |
MFC r275120:
Fix SA_SIGINFO | SA_RESETHAND handling, reset disposition after sv_sendsig()
is called.
Diffstat (limited to 'sys/kern')
-rw-r--r-- | sys/kern/kern_sig.c | 46 |
1 files changed, 27 insertions, 19 deletions
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index 45e12c4..db159f0 100644 --- a/sys/kern/kern_sig.c +++ b/sys/kern/kern_sig.c @@ -1891,6 +1891,30 @@ pgsignal(struct pgrp *pgrp, int sig, int checkctty, ksiginfo_t *ksi) } } + +/* + * Recalculate the signal mask and reset the signal disposition after + * usermode frame for delivery is formed. Should be called after + * mach-specific routine, because sysent->sv_sendsig() needs correct + * ps_siginfo and signal mask. + */ +static void +postsig_done(int sig, struct thread *td, struct sigacts *ps) +{ + sigset_t mask; + + mtx_assert(&ps->ps_mtx, MA_OWNED); + td->td_ru.ru_nsignals++; + mask = ps->ps_catchmask[_SIG_IDX(sig)]; + if (!SIGISMEMBER(ps->ps_signodefer, sig)) + SIGADDSET(mask, sig); + kern_sigprocmask(td, SIG_BLOCK, &mask, NULL, + SIGPROCMASK_PROC_LOCKED | SIGPROCMASK_PS_LOCKED); + if (SIGISMEMBER(ps->ps_sigreset, sig)) + sigdflt(ps, sig); +} + + /* * Send a signal caused by a trap to the current thread. If it will be * caught immediately, deliver it with correct code. Otherwise, post it @@ -1900,7 +1924,6 @@ void trapsignal(struct thread *td, ksiginfo_t *ksi) { struct sigacts *ps; - sigset_t mask; struct proc *p; int sig; int code; @@ -1915,7 +1938,6 @@ trapsignal(struct thread *td, ksiginfo_t *ksi) mtx_lock(&ps->ps_mtx); if ((p->p_flag & P_TRACED) == 0 && SIGISMEMBER(ps->ps_sigcatch, sig) && !SIGISMEMBER(td->td_sigmask, sig)) { - td->td_ru.ru_nsignals++; #ifdef KTRACE if (KTRPOINT(curthread, KTR_PSIG)) ktrpsig(sig, ps->ps_sigact[_SIG_IDX(sig)], @@ -1923,13 +1945,7 @@ trapsignal(struct thread *td, ksiginfo_t *ksi) #endif (*p->p_sysent->sv_sendsig)(ps->ps_sigact[_SIG_IDX(sig)], ksi, &td->td_sigmask); - mask = ps->ps_catchmask[_SIG_IDX(sig)]; - if (!SIGISMEMBER(ps->ps_signodefer, sig)) - SIGADDSET(mask, sig); - kern_sigprocmask(td, SIG_BLOCK, &mask, NULL, - SIGPROCMASK_PROC_LOCKED | SIGPROCMASK_PS_LOCKED); - if (SIGISMEMBER(ps->ps_sigreset, sig)) - sigdflt(ps, sig); + postsig_done(sig, td, ps); mtx_unlock(&ps->ps_mtx); } else { /* @@ -2811,7 +2827,7 @@ postsig(sig) struct sigacts *ps; sig_t action; ksiginfo_t ksi; - sigset_t returnmask, mask; + sigset_t returnmask; KASSERT(sig != 0, ("postsig")); @@ -2866,20 +2882,12 @@ postsig(sig) } else returnmask = td->td_sigmask; - mask = ps->ps_catchmask[_SIG_IDX(sig)]; - if (!SIGISMEMBER(ps->ps_signodefer, sig)) - SIGADDSET(mask, sig); - kern_sigprocmask(td, SIG_BLOCK, &mask, NULL, - SIGPROCMASK_PROC_LOCKED | SIGPROCMASK_PS_LOCKED); - - if (SIGISMEMBER(ps->ps_sigreset, sig)) - sigdflt(ps, sig); - td->td_ru.ru_nsignals++; if (p->p_sig == sig) { p->p_code = 0; p->p_sig = 0; } (*p->p_sysent->sv_sendsig)(action, &ksi, &returnmask); + postsig_done(sig, td, ps); } return (1); } |