Differential D25487 Diff 74119 head/sys/kern/tty_info.c

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head/sys/kern/tty_info.c

Show First 20 Lines • Show All 233 Lines • ▼ Show 20 Lines	if (tp != NULL && !KERNEL_PANICKED()) {
if (rc != 0)		if (rc != 0)
return (-ENXIO);		return (-ENXIO);
return (len);		return (len);
}		}
return (-ENXIO);		return (-ENXIO);
}		}

#ifdef STACK		#ifdef STACK
static bool tty_info_kstacks = true;		static int tty_info_kstacks = STACK_SBUF_FMT_LONG;
SYSCTL_BOOL(_kern, OID_AUTO, tty_info_kstacks, CTLFLAG_RWTUN,
&tty_info_kstacks, 0,		static int
"Enable printing kernel stack(9) traces on ^T (tty info)");		sysctl_tty_info_kstacks(SYSCTL_HANDLER_ARGS)
		{
		enum stack_sbuf_fmt val;
		int error;

		val = tty_info_kstacks;
		error = sysctl_handle_int(oidp, &val, 0, req);
		if (error != 0 \|\| req->newptr == NULL)
		return (error);

		switch (val) {
		case STACK_SBUF_FMT_NONE:
		case STACK_SBUF_FMT_LONG:
		case STACK_SBUF_FMT_COMPACT:
		tty_info_kstacks = val;
		break;
		default:
		error = EINVAL;
		}

		return (error);
		}
		SYSCTL_PROC(_kern, OID_AUTO, tty_info_kstacks,
		CTLFLAG_RWTUN \| CTLFLAG_MPSAFE \| CTLTYPE_INT, NULL, 0,
		sysctl_tty_info_kstacks, "I",
		"Adjust format of kernel stack(9) traces on ^T (tty info): "
		"0 - disabled; 1 - long; 2 - compact");
#endif		#endif

/*		/*
* Report on state of foreground process group.		* Report on state of foreground process group.
*/		*/
void		void
tty_info(struct tty *tp)		tty_info(struct tty *tp)
{		{
struct timeval rtime, utime, stime;		struct timeval rtime, utime, stime;
#ifdef STACK		#ifdef STACK
struct stack stack;		struct stack stack;
int sterr;		int sterr, kstacks_val;
		bool print_kstacks;
#endif		#endif
struct proc p, ppick;		struct proc p, ppick;
struct thread td, tdpick;		struct thread td, tdpick;
const char stateprefix, state;		const char stateprefix, state;
struct sbuf sb;		struct sbuf sb;
long rss;		long rss;
int load, pctcpu;		int load, pctcpu;
pid_t pid;		pid_t pid;
▲ Show 20 Lines • Show All 66 Lines • ▼ Show 20 Lines	#endif
else if (TD_AWAITING_INTR(td))		else if (TD_AWAITING_INTR(td))
state = "intrwait";		state = "intrwait";
else if (p->p_state == PRS_ZOMBIE)		else if (p->p_state == PRS_ZOMBIE)
state = "zombie";		state = "zombie";
else		else
state = "unknown";		state = "unknown";
pctcpu = (sched_pctcpu(td) * 10000 + FSCALE / 2) >> FSHIFT;		pctcpu = (sched_pctcpu(td) * 10000 + FSCALE / 2) >> FSHIFT;
#ifdef STACK		#ifdef STACK
if (tty_info_kstacks) {		kstacks_val = atomic_load_int(&tty_info_kstacks);
		print_kstacks = (kstacks_val != STACK_SBUF_FMT_NONE);

		if (print_kstacks) {
if (TD_IS_SWAPPED(td))		if (TD_IS_SWAPPED(td))
sterr = ENOENT;		sterr = ENOENT;
else		else
sterr = stack_save_td(&stack, td);		sterr = stack_save_td(&stack, td);
}		}
#endif		#endif
thread_unlock(td);		thread_unlock(td);
if (p->p_state == PRS_NEW \|\| p->p_state == PRS_ZOMBIE)		if (p->p_state == PRS_NEW \|\| p->p_state == PRS_ZOMBIE)
Show All 12 Lines	sbuf_printf(&sb,
" cmd: %s %d [%s%s] %ld.%02ldr %ld.%02ldu %ld.%02lds %d%% %ldk\n",		" cmd: %s %d [%s%s] %ld.%02ldr %ld.%02ldu %ld.%02lds %d%% %ldk\n",
comm, pid, stateprefix, state,		comm, pid, stateprefix, state,
(long)rtime.tv_sec, rtime.tv_usec / 10000,		(long)rtime.tv_sec, rtime.tv_usec / 10000,
(long)utime.tv_sec, utime.tv_usec / 10000,		(long)utime.tv_sec, utime.tv_usec / 10000,
(long)stime.tv_sec, stime.tv_usec / 10000,		(long)stime.tv_sec, stime.tv_usec / 10000,
pctcpu / 100, rss);		pctcpu / 100, rss);

#ifdef STACK		#ifdef STACK
if (tty_info_kstacks && sterr == 0)		if (print_kstacks && sterr == 0)
stack_sbuf_print_flags(&sb, &stack, M_NOWAIT);		stack_sbuf_print_flags(&sb, &stack, M_NOWAIT, kstacks_val);
#endif		#endif

out:		out:
sbuf_finish(&sb);		sbuf_finish(&sb);
sbuf_delete(&sb);		sbuf_delete(&sb);
}		}