#include <sys/cdefs.h>
#include "opt_compat.h"
#include "opt_kdtrace.h"
#include "opt_ktrace.h"
#include "opt_core.h"
#include "opt_procdesc.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/signalvar.h>
#include <sys/vnode.h>
#include <sys/acct.h>
#include <sys/capability.h>
#include <sys/condvar.h>
#include <sys/event.h>
#include <sys/fcntl.h>
#include <sys/imgact.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/ktrace.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/procdesc.h>
#include <sys/posix4.h>
#include <sys/pioctl.h>
#include <sys/racct.h>
#include <sys/resourcevar.h>
#include <sys/sdt.h>
#include <sys/sbuf.h>
#include <sys/sleepqueue.h>
#include <sys/smp.h>
#include <sys/stat.h>
#include <sys/sx.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/syslog.h>
#include <sys/sysproto.h>
#include <sys/timers.h>
#include <sys/unistd.h>
#include <sys/wait.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/uma.h>
#include <sys/jail.h>
#include <machine/cpu.h>
#include <security/audit/audit.h>

Include dependency graph for kern_sig.c:

Data Structures
struct	sigaction_args

struct	sigprocmask_args

struct	sigpending_args

struct	sigsuspend_args

struct	sigaltstack_args

struct	kill_args

struct	sigqueue_args

struct	nosys_args

Macros
#define	ONSIG 32 /* NSIG for osig* syscalls. XXX. */

#define	CANSIGIO(cr1, cr2)

#define	SA_KILL 0x01 /* terminates process by default */

#define	SA_CORE 0x02 /* ditto and coredumps */

#define	SA_STOP 0x04 /* suspend process */

#define	SA_TTYSTOP 0x08 /* ditto, from tty */

#define	SA_IGNORE 0x10 /* ignore by default */

#define	SA_CONT 0x20 /* continue if suspended */

#define	SA_CANTMASK 0x40 /* non-maskable, catchable */

#define	SA_PROC 0x80 /* deliverable to any thread */

#define	MAX_NUM_CORES 10

Functions
	__FBSDID ("$BSDSUniX$")

	SDT_PROVIDER_DECLARE (proc)

	SDT_PROBE_DEFINE3 (proc, kernel,, signal__send,"struct thread ","struct proc ","int")

	SDT_PROBE_DEFINE2 (proc, kernel,, signal__clear,"int","ksiginfo_t *")

	SDT_PROBE_DEFINE3 (proc, kernel,, signal__discard,"struct thread ","struct proc ","int")

static int	coredump (struct thread *)

static char *	expand_name (const char , uid_t, pid_t, struct thread , int)

static int	killpg1 (struct thread td, int sig, int pgid, int all, ksiginfo_t ksi)

static int	issignal (struct thread *td, int stop_allowed)

static int	sigprop (int sig)

static void	tdsigwakeup (struct thread *, int, sig_t, int)

static void	sig_suspend_threads (struct thread , struct proc , int)

static int	filt_sigattach (struct knote *kn)

static void	filt_sigdetach (struct knote *kn)

static int	filt_signal (struct knote *kn, long hint)

static struct thread *	sigtd (struct proc *p, int sig, int prop)

static void	sigqueue_start (void)

	SYSCTL_INT (_kern, KERN_LOGSIGEXIT, logsigexit, CTLFLAG_RW,&kern_logsigexit, 0,"Log processes quitting on abnormal signals to syslog(3)")

	SYSCTL_INT (_kern, OID_AUTO, forcesigexit, CTLFLAG_RW,&kern_forcesigexit, 0,"Force trap signal to be handled")

static	SYSCTL_NODE (_kern, OID_AUTO, sigqueue, CTLFLAG_RW, 0,"POSIX real time signal")

	SYSCTL_INT (_kern_sigqueue, OID_AUTO, max_pending_per_proc, CTLFLAG_RW,&max_pending_per_proc, 0,"Max pending signals per proc")

	TUNABLE_INT ("kern.sigqueue.preallocate",&preallocate_siginfo)

	SYSCTL_INT (_kern_sigqueue, OID_AUTO, preallocate, CTLFLAG_RD,&preallocate_siginfo, 0,"Preallocated signal memory size")

	SYSCTL_INT (_kern_sigqueue, OID_AUTO, overflow, CTLFLAG_RD,&signal_overflow, 0,"Number of signals overflew")

	SYSCTL_INT (_kern_sigqueue, OID_AUTO, alloc_fail, CTLFLAG_RD,&signal_alloc_fail, 0,"signals failed to be allocated")

	SYSINIT (signal, SI_SUB_P1003_1B, SI_ORDER_FIRST+3, sigqueue_start, NULL)

	SYSCTL_INT (_kern, OID_AUTO, sugid_coredump, CTLFLAG_RW,&sugid_coredump, 0,"Allow setuid and setgid processes to dump core")

	SYSCTL_INT (_kern, OID_AUTO, coredump, CTLFLAG_RW,&do_coredump, 0,"Enable/Disable coredumps")

	SYSCTL_INT (_kern, OID_AUTO, nodump_coredump, CTLFLAG_RW,&set_core_nodump_flag, 0,"Enable setting the NODUMP flag on coredump files")

static void	reschedule_signals (struct proc *p, sigset_t block, int flags)

ksiginfo_t *	ksiginfo_alloc (int wait)

void	ksiginfo_free (ksiginfo_t *ksi)

static __inline int	ksiginfo_tryfree (ksiginfo_t *ksi)

void	sigqueue_init (sigqueue_t list, struct proc p)

static int	sigqueue_get (sigqueue_t sq, int signo, ksiginfo_t si)

void	sigqueue_take (ksiginfo_t *ksi)

static int	sigqueue_add (sigqueue_t sq, int signo, ksiginfo_t si)

void	sigqueue_flush (sigqueue_t *sq)

static void	sigqueue_move_set (sigqueue_t src, sigqueue_t dst, const sigset_t *set)

static void	sigqueue_delete_set (sigqueue_t sq, const sigset_t set)

void	sigqueue_delete (sigqueue_t *sq, int signo)

static void	sigqueue_delete_set_proc (struct proc p, const sigset_t set)

void	sigqueue_delete_proc (struct proc *p, int signo)

static void	sigqueue_delete_stopmask_proc (struct proc *p)

int	cursig (struct thread *td, int stop_allowed)

void	signotify (struct thread *td)

int	sigonstack (size_t sp)

int	sig_ffs (sigset_t *set)

int	kern_sigaction (struct thread td, int sig, struct sigaction act, struct sigaction *oact, int flags)

int	sys_sigaction (struct thread td, struct sigaction_args uap)

void	siginit (struct proc *p)

void	execsigs (struct proc *p)

int	kern_sigprocmask (struct thread td, int how, sigset_t set, sigset_t *oset, int flags)

int	sys_sigprocmask (struct thread td, struct sigprocmask_args uap)

int	sys_sigwait (struct thread td, struct sigwait_args uap)

int	sys_sigtimedwait (struct thread td, struct sigtimedwait_args uap)

int	sys_sigwaitinfo (struct thread td, struct sigwaitinfo_args uap)

int	kern_sigtimedwait (struct thread td, sigset_t waitset, ksiginfo_t ksi, struct timespec *timeout)

int	sys_sigpending (struct thread td, struct sigpending_args uap)

int	sys_sigsuspend (struct thread td, struct sigsuspend_args uap)

int	kern_sigsuspend (struct thread *td, sigset_t mask)

int	sys_sigaltstack (struct thread td, struct sigaltstack_args uap)

int	kern_sigaltstack (struct thread td, stack_t ss, stack_t *oss)

int	sys_kill (struct thread td, struct kill_args uap)

int	sys_pdkill (struct thread td, struct pdkill_args uap)

int	sys_sigqueue (struct thread td, struct sigqueue_args uap)

void	gsignal (int pgid, int sig, ksiginfo_t *ksi)

void	pgsignal (struct pgrp pgrp, int sig, int checkctty, ksiginfo_t ksi)

static void	postsig_done (int sig, struct thread td, struct sigacts ps)

void	trapsignal (struct thread td, ksiginfo_t ksi)

void	kern_psignal (struct proc *p, int sig)

int	pksignal (struct proc p, int sig, ksiginfo_t ksi)

int	sigev_findtd (struct proc p, struct sigevent sigev, struct thread **ttd)

void	tdsignal (struct thread *td, int sig)

void	tdksignal (struct thread td, int sig, ksiginfo_t ksi)

int	tdsendsignal (struct proc p, struct thread td, int sig, ksiginfo_t *ksi)

int	ptracestop (struct thread *td, int sig)

void	tdsigcleanup (struct thread *td)

int	sigdeferstop (void)

void	sigallowstop ()

void	thread_stopped (struct proc *p)

int	postsig (int sig)

void	killproc (struct proc p, char why)

void	sigexit (struct thread *td, int sig)

static void	sigparent (struct proc *p, int reason, int status)

static void	childproc_jobstate (struct proc *p, int reason, int sig)

void	childproc_stopped (struct proc *p, int reason)

void	childproc_continued (struct proc *p)

void	childproc_exited (struct proc *p)

static int	sysctl_debug_num_cores_check (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_debug, OID_AUTO, ncores, CTLTYPE_INT\|CTLFLAG_RW, 0, sizeof(int), sysctl_debug_num_cores_check,"I","")

	SYSCTL_STRING (_kern, OID_AUTO, corefile, CTLFLAG_RW, corefilename, sizeof(corefilename),"process corefile name format string")

int	nosys (struct thread td, struct nosys_args args)

void	pgsigio (struct sigio **sigiop, int sig, int checkctty)

struct sigacts *	sigacts_alloc (void)

void	sigacts_free (struct sigacts *ps)

struct sigacts *	sigacts_hold (struct sigacts *ps)

void	sigacts_copy (struct sigacts dest, struct sigacts src)

int	sigacts_shared (struct sigacts *ps)

Variables
static uma_zone_t	ksiginfo_zone = NULL

struct filterops	sig_filtops

static int	kern_logsigexit = 1

static int	kern_forcesigexit = 1

static int	max_pending_per_proc = 128

static int	preallocate_siginfo = 1024

static int	signal_overflow = 0

static int	signal_alloc_fail = 0

static int	sugid_coredump

static int	do_coredump = 1

static int	set_core_nodump_flag = 0

static int	sigproptbl [NSIG]

static int	num_cores = 5

static char	corefilename [MAXPATHLEN] = {"%N.core"}

Macro Definition Documentation

#define CANSIGIO	(	cr1,
		cr2
	)

Value:

((cr1)->cr_uid == 0 || \
            (cr1)->cr_ruid == (cr2)->cr_ruid || \
            (cr1)->cr_uid == (cr2)->cr_ruid || \
            (cr1)->cr_ruid == (cr2)->cr_uid || \
            (cr1)->cr_uid == (cr2)->cr_uid)

Definition at line 161 of file kern_sig.c.

Referenced by pgsigio().

#define MAX_NUM_CORES 10

Definition at line 3014 of file kern_sig.c.

Referenced by sysctl_debug_num_cores_check().

#define ONSIG 32 /* NSIG for osig* syscalls. XXX. */

Definition at line 93 of file kern_sig.c.

#define SA_CANTMASK 0x40 /* non-maskable, catchable */

Definition at line 191 of file kern_sig.c.

#define SA_CONT 0x20 /* continue if suspended */

Definition at line 190 of file kern_sig.c.

Referenced by issignal(), tdsendsignal(), and tdsigwakeup().

#define SA_CORE 0x02 /* ditto and coredumps */

Definition at line 186 of file kern_sig.c.

Referenced by sigexit().

#define SA_IGNORE 0x10 /* ignore by default */

Definition at line 189 of file kern_sig.c.

Referenced by execsigs(), issignal(), kern_sigaction(), postsig_done(), and siginit().

#define SA_KILL 0x01 /* terminates process by default */

Definition at line 185 of file kern_sig.c.

Referenced by tdsigwakeup().

#define SA_PROC 0x80 /* deliverable to any thread */

Definition at line 192 of file kern_sig.c.

#define SA_STOP 0x04 /* suspend process */

Definition at line 187 of file kern_sig.c.

Referenced by issignal(), tdsendsignal(), and tdsigwakeup().

#define SA_TTYSTOP 0x08 /* ditto, from tty */

Definition at line 188 of file kern_sig.c.

Referenced by issignal(), and tdsendsignal().

Function Documentation

__FBSDID ( "$BSDSUniX$" )

void childproc_continued ( struct proc * p )

Definition at line 2985 of file kern_sig.c.

References childproc_jobstate().

Referenced by tdsendsignal().

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void childproc_exited ( struct proc * p )

Definition at line 2991 of file kern_sig.c.

References sigparent().

Referenced by exit1().

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static void childproc_jobstate	(	struct proc *	p,
		int	reason,
		int	sig
	)

static

Definition at line 2952 of file kern_sig.c.

References sigparent(), and wakeup().

Referenced by childproc_continued(), and childproc_stopped().

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void childproc_stopped	(	struct proc *	p,
		int	reason
	)

Definition at line 2978 of file kern_sig.c.

References childproc_jobstate().

Referenced by thread_stopped().

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static int coredump ( struct thread * td )

static

Definition at line 3207 of file kern_sig.c.

References do_coredump, expand_name(), free(), lim_cur(), name, NDFREE(), racct_get_available(), set_core_nodump_flag, sugid_coredump, vn_close(), vn_finished_write(), vn_open_cred(), and vn_start_write().

Referenced by sigexit().

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int cursig	(	struct thread *	td,
		int	stop_allowed
	)

Definition at line 559 of file kern_sig.c.

References issignal().

Referenced by ast(), kern_sigsuspend(), kern_sigtimedwait(), and sleepq_catch_signals().

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void execsigs ( struct proc * p )

Definition at line 916 of file kern_sig.c.

References SA_IGNORE, sig_ffs(), sigprop(), and sigqueue_delete_proc().

Referenced by do_execve().

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static char * expand_name	(	const char *	name,
		uid_t	uid,
		pid_t	pid,
		struct thread *	td,
		int	compress
	)

static

Definition at line 3066 of file kern_sig.c.

References corefilename, free(), getcredhostname(), log(), malloc(), NDFREE(), num_cores, sbuf_delete(), sbuf_error(), sbuf_finish(), sbuf_len(), sbuf_new(), sbuf_printf(), sbuf_putc(), vn_close(), and vn_open().

Referenced by coredump().

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static int filt_sigattach ( struct knote * kn )

static

Definition at line 3412 of file kern_sig.c.

References knlist_add().

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static void filt_sigdetach ( struct knote * kn )

static

Definition at line 3425 of file kern_sig.c.

References knlist_remove().

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static int filt_signal	(	struct knote *	kn,
		long	hint
	)

static

Definition at line 3439 of file kern_sig.c.

void gsignal	(	int	pgid,
		int	sig,
		ksiginfo_t *	ksi
	)

Definition at line 1814 of file kern_sig.c.

References pgfind(), pgsignal(), and proctree_lock.

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static int issignal	(	struct thread *	td,
		int	stop_allowed
	)

static

Definition at line 2583 of file kern_sig.c.

References printf(), ptracestop(), SA_CONT, SA_IGNORE, SA_STOP, SA_TTYSTOP, sig_ffs(), sig_suspend_threads(), signotify(), sigprop(), sigqueue_add(), sigqueue_delete(), sigqueue_get(), stopevent(), and thread_suspend_switch().

Referenced by cursig().

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void kern_psignal	(	struct proc *	p,
		int	sig
	)

Definition at line 1975 of file kern_sig.c.

References tdsendsignal().

Referenced by aio_process(), ast(), devctl_queue_data_f(), do_fork(), exit1(), kern_ptrace(), killproc(), lim_cb(), orphanpg(), pgsigio(), prison_remove_one(), realitexpire(), shutdown_nice(), sys_pdkill(), tty_signal_sessleader(), and vn_rlimit_fsize().

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int kern_sigaction	(	struct thread *	td,
		int	sig,
		struct sigaction *	act,
		struct sigaction *	oact,
		int	flags
	)

Definition at line 633 of file kern_sig.c.

References SA_IGNORE, sigprop(), and sigqueue_delete_proc().

Referenced by sys_sigaction().

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int kern_sigaltstack	(	struct thread *	td,
		stack_t *	ss,
		stack_t *	oss
	)

Definition at line 1558 of file kern_sig.c.

References sigonstack().

Referenced by sys_sigaltstack().

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int kern_sigprocmask	(	struct thread *	td,
		int	how,
		sigset_t *	set,
		sigset_t *	oset,
		int	flags
	)

Definition at line 964 of file kern_sig.c.

References reschedule_signals(), set, and signotify().

Referenced by ast(), kern_pselect(), kern_sigsuspend(), postsig_done(), sys_setcontext(), sys_sigprocmask(), and sys_swapcontext().

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int kern_sigsuspend	(	struct thread *	td,
		sigset_t	mask
	)

Definition at line 1429 of file kern_sig.c.

References cursig(), kern_sigprocmask(), postsig(), and thread_suspend_check().

Referenced by sys_sigsuspend().

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int kern_sigtimedwait	(	struct thread *	td,
		sigset_t	waitset,
		ksiginfo_t *	ksi,
		struct timespec *	timeout
	)

Definition at line 1164 of file kern_sig.c.

References cursig(), getnanouptime(), itimer_accept(), reschedule_signals(), sigexit(), sigqueue_get(), and tvtohz().

Referenced by sys_sigtimedwait(), sys_sigwait(), and sys_sigwaitinfo().

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static int killpg1	(	struct thread *	td,
		int	sig,
		int	pgid,
		int	all,
		ksiginfo_t *	ksi
	)

static

Definition at line 1594 of file kern_sig.c.

References allproc_lock, p_cansignal(), pgfind(), pksignal(), and proctree_lock.

Referenced by sys_kill().

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void killproc	(	struct proc *	p,
		char *	why
	)

Definition at line 2865 of file kern_sig.c.

References kern_psignal(), and log().

Referenced by lim_cb().

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ksiginfo_t* ksiginfo_alloc ( int wait )

Definition at line 242 of file kern_sig.c.

References ksiginfo_zone.

Referenced by proc_linkup(), and sigqueue_add().

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void ksiginfo_free ( ksiginfo_t * ksi )

Definition at line 255 of file kern_sig.c.

References ksiginfo_zone.

Referenced by proc_fini().

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static __inline int ksiginfo_tryfree ( ksiginfo_t * ksi )

static

Definition at line 261 of file kern_sig.c.

References ksiginfo_zone.

Referenced by sigqueue_delete_set(), sigqueue_flush(), sigqueue_get(), and tdsendsignal().

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int nosys	(	struct thread *	td,
		struct nosys_args *	args
	)

Definition at line 3355 of file kern_sig.c.

References tdsignal().

Referenced by lkmnosys(), and lkmressys().

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void pgsigio	(	struct sigio **	sigiop,
		int	sig,
		int	checkctty
	)

Definition at line 3372 of file kern_sig.c.

References CANSIGIO, and kern_psignal().

Referenced by kqueue_wakeup(), logtimeout(), pipeselwakeup(), sohasoutofband(), sowakeup(), and tty_wakeup().

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void pgsignal	(	struct pgrp *	pgrp,
		int	sig,
		int	checkctty,
		ksiginfo_t *	ksi
	)

Definition at line 1834 of file kern_sig.c.

References pksignal().

Referenced by gsignal(), tty_signal_pgrp(), and tty_wait_background().

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int pksignal	(	struct proc *	p,
		int	sig,
		ksiginfo_t *	ksi
	)

Definition at line 1986 of file kern_sig.c.

References tdsendsignal().

Referenced by killpg1(), pgsignal(), proc_reap(), sigparent(), sys_kill(), and sys_sigqueue().

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int postsig ( int sig )

Definition at line 2788 of file kern_sig.c.

References itimer_accept(), postsig_done(), sigexit(), sigqueue_get(), and stopevent().

Referenced by ast(), and kern_sigsuspend().

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static void postsig_done	(	int	sig,
		struct thread *	td,
		struct sigacts *	ps
	)

static

Definition at line 1858 of file kern_sig.c.

References kern_sigprocmask(), mask, SA_IGNORE, and sigprop().

Referenced by postsig(), and trapsignal().

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int ptracestop	(	struct thread *	td,
		int	sig
	)

Definition at line 2434 of file kern_sig.c.

References sig_suspend_threads(), and thread_suspend_switch().

Referenced by fork_return(), issignal(), syscallenter(), and syscallret().

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static void reschedule_signals	(	struct proc *	p,
		sigset_t	block,
		int	flags
	)

static

Definition at line 2482 of file kern_sig.c.

References sig_ffs(), signotify(), sigtd(), and tdsigwakeup().

Referenced by kern_sigprocmask(), kern_sigtimedwait(), and tdsigcleanup().

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SDT_PROBE_DEFINE2	(	proc	,
		kernel	,
		signal__clear	,
		"int"	,
		"ksiginfo_t *"
	)

SDT_PROBE_DEFINE3	(	proc	,
		kernel	,
		signal__send	,
		"struct thread *"	,
		"struct proc *"	,
		"int"
	)

SDT_PROBE_DEFINE3	(	proc	,
		kernel	,
		signal__discard	,
		"struct thread *"	,
		"struct proc *"	,
		"int"
	)

SDT_PROVIDER_DECLARE ( proc )

int sig_ffs ( sigset_t * set )

Definition at line 616 of file kern_sig.c.

Referenced by execsigs(), issignal(), and reschedule_signals().

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static void sig_suspend_threads	(	struct thread *	td,
		struct proc *	p,
		int	sending
	)

static

Definition at line 2394 of file kern_sig.c.

References thread_suspend_one().

Referenced by issignal(), ptracestop(), and tdsendsignal().

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struct sigacts* sigacts_alloc ( void )

Definition at line 3452 of file kern_sig.c.

References malloc(), and mtx_init().

Referenced by do_execve(), do_fork(), and proc0_init().

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void sigacts_copy	(	struct sigacts *	dest,
		struct sigacts *	src
	)

Definition at line 3485 of file kern_sig.c.

Referenced by do_execve(), and do_fork().

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void sigacts_free ( struct sigacts * ps )

Definition at line 3463 of file kern_sig.c.

References free(), and mtx_destroy().

Referenced by do_execve(), and proc_reap().

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struct sigacts* sigacts_hold ( struct sigacts * ps )

Definition at line 3476 of file kern_sig.c.

Referenced by do_fork().

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int sigacts_shared ( struct sigacts * ps )

Definition at line 3495 of file kern_sig.c.

Referenced by do_execve().

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void sigallowstop ( )

Definition at line 2560 of file kern_sig.c.

int sigdeferstop ( void )

Definition at line 2541 of file kern_sig.c.

int sigev_findtd	(	struct proc *	p,
		struct sigevent *	sigev,
		struct thread **	ttd
	)

Definition at line 1994 of file kern_sig.c.

References tdfind().

Referenced by aio_sendsig(), itimer_fire(), and mqueue_send_notification().

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void sigexit	(	struct thread *	td,
		int	sig
	)

Definition at line 2888 of file kern_sig.c.

References coredump(), exit1(), kern_logsigexit, log(), SA_CORE, sigprop(), and thread_single().

Referenced by kern_sigtimedwait(), and postsig().

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void siginit ( struct proc * p )

Definition at line 896 of file kern_sig.c.

References SA_IGNORE, and sigprop().

Referenced by proc0_init().

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void signotify ( struct thread * td )

Definition at line 575 of file kern_sig.c.

Referenced by issignal(), kern_sigprocmask(), reschedule_signals(), and tdsendsignal().

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int sigonstack ( size_t sp )

Definition at line 591 of file kern_sig.c.

Referenced by kern_sigaltstack().

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static void sigparent	(	struct proc *	p,
		int	reason,
		int	status
	)

static

Definition at line 2934 of file kern_sig.c.

References pksignal().

Referenced by childproc_exited(), and childproc_jobstate().

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static __inline int sigprop ( int sig )

static

Definition at line 607 of file kern_sig.c.

References sigproptbl.

Referenced by execsigs(), issignal(), kern_sigaction(), postsig_done(), sigexit(), siginit(), tdsendsignal(), and tdsigwakeup().

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static int sigqueue_add	(	sigqueue_t *	sq,
		int	signo,
		ksiginfo_t *	si
	)

static

Definition at line 349 of file kern_sig.c.

References ksiginfo_alloc(), ksiginfo_zone, max_pending_per_proc, signal_alloc_fail, and signal_overflow.

Referenced by issignal(), and tdsendsignal().

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void sigqueue_delete	(	sigqueue_t *	sq,
		int	signo
	)

Definition at line 503 of file kern_sig.c.

References set, and sigqueue_delete_set().

Referenced by issignal(), tdsendsignal(), and tdsigwakeup().

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void sigqueue_delete_proc	(	struct proc *	p,
		int	signo
	)

Definition at line 531 of file kern_sig.c.

References set, and sigqueue_delete_set_proc().

Referenced by execsigs(), kern_sigaction(), and tdsendsignal().

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static void sigqueue_delete_set	(	sigqueue_t *	sq,
		const sigset_t *	set
	)

static

Definition at line 482 of file kern_sig.c.

References ksiginfo_tryfree().

Referenced by sigqueue_delete().

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static void sigqueue_delete_set_proc	(	struct proc *	p,
		const sigset_t *	set
	)

static

Definition at line 514 of file kern_sig.c.

References sigqueue_flush(), sigqueue_init(), and sigqueue_move_set().

Referenced by sigqueue_delete_proc(), and sigqueue_delete_stopmask_proc().

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static void sigqueue_delete_stopmask_proc ( struct proc * p )

static

Definition at line 541 of file kern_sig.c.

References set, and sigqueue_delete_set_proc().

Referenced by tdsendsignal().

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void sigqueue_flush ( sigqueue_t * sq )

Definition at line 412 of file kern_sig.c.

References ksiginfo_tryfree().

Referenced by exit1(), sigqueue_delete_set_proc(), and tdsigcleanup().

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static int sigqueue_get	(	sigqueue_t *	sq,
		int	signo,
		ksiginfo_t *	si
	)

static

Definition at line 287 of file kern_sig.c.

References count, and ksiginfo_tryfree().

Referenced by issignal(), kern_sigtimedwait(), and postsig().

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void sigqueue_init	(	sigqueue_t *	list,
		struct proc *	p
	)

Definition at line 271 of file kern_sig.c.

Referenced by proc_linkup(), sigqueue_delete_set_proc(), and thread_link().

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static void sigqueue_move_set	(	sigqueue_t *	src,
		sigqueue_t *	dst,
		const sigset_t *	set
	)

static

Definition at line 434 of file kern_sig.c.

Referenced by sigqueue_delete_set_proc().

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static void sigqueue_start ( void )

static

Definition at line 231 of file kern_sig.c.

References ksiginfo_zone, max_pending_per_proc, p31b_setcfg(), and preallocate_siginfo.

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void sigqueue_take ( ksiginfo_t * ksi )

Definition at line 324 of file kern_sig.c.

Referenced by aio_free_entry(), aio_proc_rundown(), kern_kmq_notify(), kern_ktimer_delete(), kern_lio_listio(), kern_ptrace(), kern_wait6(), notifier_remove(), proc_reap(), proc_reparent(), and tdsendsignal().

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static struct thread * sigtd	(	struct proc *	p,
		int	sig,
		int	prop
	)

static

Definition at line 1933 of file kern_sig.c.

Referenced by reschedule_signals(), and tdsendsignal().

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int sys_kill	(	struct thread *	td,
		struct kill_args *	uap
	)

Definition at line 1671 of file kern_sig.c.

References killpg1(), p_cansignal(), pfind(), kill_args::pid, pksignal(), kill_args::signum, and zpfind().

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int sys_pdkill	(	struct thread *	td,
		struct pdkill_args *	uap
	)

Definition at line 1713 of file kern_sig.c.

References kern_psignal(), and p_cansignal().

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int sys_sigaction	(	struct thread *	td,
		struct sigaction_args *	uap
	)

Definition at line 783 of file kern_sig.c.

References kern_sigaction().

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int sys_sigaltstack	(	struct thread *	td,
		struct sigaltstack_args *	uap
	)

Definition at line 1536 of file kern_sig.c.

References kern_sigaltstack().

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int sys_sigpending	(	struct thread *	td,
		struct sigpending_args *	uap
	)

Definition at line 1283 of file kern_sig.c.

References sigpending_args::set.

int sys_sigprocmask	(	struct thread *	td,
		struct sigprocmask_args *	uap
	)

Definition at line 1034 of file kern_sig.c.

References sigprocmask_args::how, kern_sigprocmask(), sigprocmask_args::oset, set, and sigprocmask_args::set.

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int sys_sigqueue	(	struct thread *	td,
		struct sigqueue_args *	uap
	)

Definition at line 1775 of file kern_sig.c.

References p_cansignal(), pfind(), sigqueue_args::pid, pksignal(), sigqueue_args::signum, sigqueue_args::value, and zpfind().

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int sys_sigsuspend	(	struct thread *	td,
		struct sigsuspend_args *	uap
	)

Definition at line 1415 of file kern_sig.c.

References kern_sigsuspend(), mask, and sigsuspend_args::sigmask.

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int sys_sigtimedwait	(	struct thread *	td,
		struct sigtimedwait_args *	uap
	)

Definition at line 1107 of file kern_sig.c.

References kern_sigtimedwait(), set, timeout(), and ts.

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int sys_sigwait	(	struct thread *	td,
		struct sigwait_args *	uap
	)

Definition at line 1079 of file kern_sig.c.

References kern_sigtimedwait(), and set.

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int sys_sigwaitinfo	(	struct thread *	td,
		struct sigwaitinfo_args *	uap
	)

Definition at line 1141 of file kern_sig.c.

References kern_sigtimedwait(), and set.

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static int sysctl_debug_num_cores_check ( SYSCTL_HANDLER_ARGS )

static

Definition at line 3018 of file kern_sig.c.

References MAX_NUM_CORES, num_cores, and sysctl_handle_int().

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SYSCTL_INT	(	_kern	,
		KERN_LOGSIGEXIT	,
		logsigexit	,
		CTLFLAG_RW	,
		&	kern_logsigexit,
		0	,
		"Log processes quitting on abnormal signals to syslog(3)"
	)

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		forcesigexit	,
		CTLFLAG_RW	,
		&	kern_forcesigexit,
		0	,
		"Force trap signal to be handled"
	)

SYSCTL_INT	(	_kern_sigqueue	,
		OID_AUTO	,
		max_pending_per_proc	,
		CTLFLAG_RW	,
		&	max_pending_per_proc,
		0	,
		"Max pending signals per proc"
	)

SYSCTL_INT	(	_kern_sigqueue	,
		OID_AUTO	,
		preallocate	,
		CTLFLAG_RD	,
		&	preallocate_siginfo,
		0	,
		"Preallocated signal memory size"
	)

SYSCTL_INT	(	_kern_sigqueue	,
		OID_AUTO	,
		overflow	,
		CTLFLAG_RD	,
		&	signal_overflow,
		0	,
		"Number of signals overflew"
	)

SYSCTL_INT	(	_kern_sigqueue	,
		OID_AUTO	,
		alloc_fail	,
		CTLFLAG_RD	,
		&	signal_alloc_fail,
		0	,
		"signals failed to be allocated"
	)

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		sugid_coredump	,
		CTLFLAG_RW	,
		&	sugid_coredump,
		0	,
		"Allow setuid and setgid processes to dump core"
	)

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		coredump	,
		CTLFLAG_RW	,
		&	do_coredump,
		0	,
		"Enable/Disable coredumps"
	)

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		nodump_coredump	,
		CTLFLAG_RW	,
		&	set_core_nodump_flag,
		0	,
		"Enable setting the NODUMP flag on coredump files"
	)

static SYSCTL_NODE	(	_kern	,
		OID_AUTO	,
		sigqueue	,
		CTLFLAG_RW	,
		0	,
		"POSIX real time signal"
	)

static

SYSCTL_PROC	(	_debug	,
		OID_AUTO	,
		ncores	,
		CTLTYPE_INT\|	CTLFLAG_RW,
		0	,
		sizeof(int)	,
		sysctl_debug_num_cores_check	,
		"I"	,
		""
	)

SYSCTL_STRING	(	_kern	,
		OID_AUTO	,
		corefile	,
		CTLFLAG_RW	,
		corefilename	,
		sizeof(corefilename)	,
		"process corefile name format string"
	)

SYSINIT	(	signal	,
		SI_SUB_P1003_1B	,
		SI_ORDER_FIRST+	3,
		sigqueue_start	,
		NULL
	)

void tdksignal	(	struct thread *	td,
		int	sig,
		ksiginfo_t *	ksi
	)

Definition at line 2022 of file kern_sig.c.

References tdsendsignal().

Referenced by sys_thr_kill(), and sys_thr_kill2().

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int tdsendsignal	(	struct proc *	p,
		struct thread *	td,
		int	sig,
		ksiginfo_t *	ksi
	)

Definition at line 2029 of file kern_sig.c.

References childproc_continued(), ksiginfo_tryfree(), panic(), SA_CONT, SA_STOP, SA_TTYSTOP, sig_suspend_threads(), signotify(), sigprop(), sigqueue_add(), sigqueue_delete(), sigqueue_delete_proc(), sigqueue_delete_stopmask_proc(), sigqueue_take(), sigtd(), sleepq_abort(), tdsigwakeup(), thread_stopped(), thread_unsuspend(), and wakeup().

Referenced by aio_sendsig(), itimer_fire(), kern_psignal(), mqueue_send_notification(), pksignal(), tdksignal(), tdsignal(), and trapsignal().

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void tdsigcleanup ( struct thread * td )

Definition at line 2509 of file kern_sig.c.

References reschedule_signals(), and sigqueue_flush().

Referenced by sys_thr_exit(), and thread_suspend_check().

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void tdsignal	(	struct thread *	td,
		int	sig
	)

Definition at line 2011 of file kern_sig.c.

References tdsendsignal().

Referenced by dofilewrite(), kern_sendit(), nosys(), soo_write(), sys_sctp_generic_sendmsg(), and sys_sctp_generic_sendmsg_iov().

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static void tdsigwakeup	(	struct thread *	td,
		int	sig,
		sig_t	action,
		int	intrval
	)

static

Definition at line 2317 of file kern_sig.c.

References SA_CONT, SA_KILL, SA_STOP, sched_prio(), sigprop(), sigqueue_delete(), and sleepq_abort().

Referenced by reschedule_signals(), and tdsendsignal().

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void thread_stopped ( struct proc * p )

Definition at line 2763 of file kern_sig.c.

References childproc_stopped().

Referenced by sys_thr_exit(), tdsendsignal(), thread_suspend_check(), and thread_suspend_switch().

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void trapsignal	(	struct thread *	td,
		ksiginfo_t *	ksi
	)

Definition at line 1884 of file kern_sig.c.

References kern_forcesigexit, postsig_done(), and tdsendsignal().

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TUNABLE_INT	(	"kern.sigqueue.preallocate"	,
		&	preallocate_siginfo
	)

Variable Documentation

char corefilename[MAXPATHLEN] = {"%N.core"}

static

Definition at line 3050 of file kern_sig.c.

Referenced by expand_name().

int do_coredump = 1

static

Definition at line 172 of file kern_sig.c.

Referenced by coredump().

int kern_forcesigexit = 1

static

Definition at line 130 of file kern_sig.c.

Referenced by trapsignal().

int kern_logsigexit = 1

static

Definition at line 125 of file kern_sig.c.

Referenced by sigexit().

uma_zone_t ksiginfo_zone = NULL

static

Definition at line 117 of file kern_sig.c.

Referenced by ksiginfo_alloc(), ksiginfo_free(), ksiginfo_tryfree(), sigqueue_add(), and sigqueue_start().

int max_pending_per_proc = 128

static

Definition at line 137 of file kern_sig.c.

Referenced by sigqueue_add(), and sigqueue_start().

int num_cores = 5

static

Definition at line 3015 of file kern_sig.c.

Referenced by expand_name(), and sysctl_debug_num_cores_check().

int preallocate_siginfo = 1024

static

Definition at line 141 of file kern_sig.c.

Referenced by sigqueue_start().

int set_core_nodump_flag = 0

static

Definition at line 176 of file kern_sig.c.

Referenced by coredump().

struct filterops sig_filtops

Initial value:

= {
        .f_isfd = 0,
        .f_attach = filt_sigattach,
        .f_detach = filt_sigdetach,
        .f_event = filt_signal,
}

Definition at line 118 of file kern_sig.c.

int signal_alloc_fail = 0

static

Definition at line 150 of file kern_sig.c.

Referenced by sigqueue_add().

int signal_overflow = 0

static

Definition at line 146 of file kern_sig.c.

Referenced by sigqueue_add().

int sigproptbl[NSIG]

static

Definition at line 194 of file kern_sig.c.

Referenced by sigprop().

int sugid_coredump

static

Definition at line 168 of file kern_sig.c.

Referenced by coredump().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

Function Documentation

Variable Documentation