diff options
Diffstat (limited to 'usr/src/uts/common/os/sig.c')
| -rw-r--r-- | usr/src/uts/common/os/sig.c | 60 |
1 files changed, 54 insertions, 6 deletions
diff --git a/usr/src/uts/common/os/sig.c b/usr/src/uts/common/os/sig.c index 0b79c3765a..ae643c280e 100644 --- a/usr/src/uts/common/os/sig.c +++ b/usr/src/uts/common/os/sig.c @@ -22,7 +22,7 @@ /* * Copyright 2010 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. - * Copyright (c) 2014, Joyent, Inc. All rights reserved. + * Copyright 2015, Joyent, Inc. */ /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ @@ -60,6 +60,7 @@ #include <sys/cyclic.h> #include <sys/dtrace.h> #include <sys/sdt.h> +#include <sys/brand.h> const k_sigset_t nullsmask = {0, 0, 0}; @@ -193,7 +194,7 @@ eat_signal(kthread_t *t, int sig) !(ttoproc(t)->p_proc_flag & P_PR_LOCK)) { ttoproc(t)->p_stopsig = 0; t->t_dtrace_stop = 0; - t->t_schedflag |= TS_XSTART | TS_PSTART; + t->t_schedflag |= TS_XSTART | TS_PSTART | TS_BSTART; setrun_locked(t); } else if (t != curthread && t->t_state == TS_ONPROC) { aston(t); /* make it do issig promptly */ @@ -607,6 +608,21 @@ issig_forreal(void) } /* + * Allow the brand the chance to alter (or suppress) delivery + * of this signal. + */ + if (PROC_IS_BRANDED(p) && BROP(p)->b_issig_stop != NULL) { + /* + * The brand hook will return 0 if it would like + * us to drive on, or -1 if we should restart + * the loop to check other conditions. + */ + if (BROP(p)->b_issig_stop(p, lwp) != 0) { + continue; + } + } + + /* * Honor requested stop before dealing with the * current signal; a debugger may change it. * Do not want to go back to loop here since this is a special @@ -938,6 +954,16 @@ stop(int why, int what) } break; + case PR_BRAND: + /* + * We have been stopped by the brand code for a brand-private + * reason. This is an asynchronous stop affecting only this + * LWP. + */ + VERIFY(PROC_IS_BRANDED(p)); + flags &= ~TS_BSTART; + break; + default: /* /proc stop */ flags &= ~TS_PSTART; /* @@ -1049,7 +1075,7 @@ stop(int why, int what) } } - if (why != PR_JOBCONTROL && why != PR_CHECKPOINT) { + if (why != PR_JOBCONTROL && why != PR_CHECKPOINT && why != PR_BRAND) { /* * Do process-level notification when all lwps are * either stopped on events of interest to /proc @@ -1155,6 +1181,13 @@ stop(int why, int what) if (why == PR_CHECKPOINT) del_one_utstop(); + /* + * Allow the brand to post notification of this stop condition. + */ + if (PROC_IS_BRANDED(p) && BROP(p)->b_stop_notify != NULL) { + BROP(p)->b_stop_notify(p, lwp, why, what); + } + thread_lock(t); ASSERT((t->t_schedflag & TS_ALLSTART) == 0); t->t_schedflag |= flags; @@ -1176,7 +1209,7 @@ stop(int why, int what) (p->p_flag & (SEXITLWPS|SKILLED))) { p->p_stopsig = 0; thread_lock(t); - t->t_schedflag |= TS_XSTART | TS_PSTART; + t->t_schedflag |= TS_XSTART | TS_PSTART | TS_BSTART; setrun_locked(t); thread_unlock_nopreempt(t); } else if (why == PR_JOBCONTROL) { @@ -1413,6 +1446,9 @@ psig(void) DTRACE_PROC3(signal__handle, int, sig, k_siginfo_t *, sip, void (*)(void), func); + if (PROC_IS_BRANDED(p) && BROP(p)->b_psig_to_proc) + BROP(p)->b_psig_to_proc(p, t, sig); + lwp->lwp_cursig = 0; lwp->lwp_extsig = 0; if (lwp->lwp_curinfo) { @@ -1755,9 +1791,12 @@ post_sigcld(proc_t *cp, sigqueue_t *sqp) /* * This can only happen when the parent is init. * (See call to sigcld(q, NULL) in exit().) - * Use KM_NOSLEEP to avoid deadlock. + * Use KM_NOSLEEP to avoid deadlock. The child procs + * initpid can be 1 for zlogin. */ - ASSERT(pp == proc_init); + ASSERT(pp->p_pidp->pid_id == + cp->p_zone->zone_proc_initpid || + pp->p_pidp->pid_id == 1); winfo(cp, &info, 0); sigaddq(pp, NULL, &info, KM_NOSLEEP); } else { @@ -1788,6 +1827,15 @@ sigcld_repost() sqp = kmem_zalloc(sizeof (sigqueue_t), KM_SLEEP); mutex_enter(&pidlock); + if (PROC_IS_BRANDED(pp) && BROP(pp)->b_sigcld_repost != NULL) { + /* + * Allow the brand to inject synthetic SIGCLD signals. + */ + if (BROP(pp)->b_sigcld_repost(pp, sqp) == 0) { + mutex_exit(&pidlock); + return; + } + } for (cp = pp->p_child; cp; cp = cp->p_sibling) { if (cp->p_pidflag & CLDPEND) { post_sigcld(cp, sqp); |