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PANIC(9)	       FreeBSD Kernel Developer's Manual	      PANIC(9)

NAME
     panic -- bring down system	on fatal error

SYNOPSIS
     #include <sys/types.h>
     #include <sys/systm.h>

     void
     panic(const char *fmt, ...);

     void
     vpanic(const char *fmt, va_list ap);

DESCRIPTION
     The panic() and vpanic() functions	terminate the running system.  The
     message fmt is a printf(3)	style format string.  The message is printed
     to	the console and	the location panicstr is set to	the address of the
     message text for retrieval	from the OS core dump.

     If	the kernel debugger is installed control is passed to it, otherwise an
     attempt to	save a core dump of the	OS to a	configured dump	device is
     made.

     If	panic()	is called twice	(from the disk sync routines, for example) the
     system is rebooted	without	syncing	the disks.

RETURN VALUES
     The panic() function does not return.

FreeBSD	10.2			April 23, 2015			  FreeBSD 10.2

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES

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<https://www.freebsd.org/cgi/man.cgi?query=panic&sektion=9&manpath=FreeBSD+10.2-RELEASE>

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