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
Thepanic()
  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.