lib/libsys/panic.c

   1 #include <stdlib.h>
   2 #include <signal.h>
   3 #include <unistd.h>
   4 #include <stdarg.h>
   5 #include <minix/sysutil.h>
   6
   7 #include "syslib.h"
   8
   9 /*===========================================================================*
  10  *                              panic                                *
  11  *===========================================================================*/
  12 void panic(const char *fmt, ...)
  13 {
  14 /* Something awful has happened. Panics are caused when an internal
  15  * inconsistency is detected, e.g., a programming error or illegal
  16  * value of a defined constant.
  17  */
  18   endpoint_t me = NONE;
  19   char name[20];
  20   int priv_flags;
  21   void (*suicide)(void);
  22   va_list args;
  23
  24   if(sys_whoami(&me, name, sizeof(name), &priv_flags) == OK && me != NONE)
  25         printf("%s(%d): panic: ", name, me);
  26   else
  27         printf("(sys_whoami failed): panic: ");
  28
  29   if(fmt) {
  30         va_start(args, fmt);
  31         vprintf(fmt, args);
  32         va_end(args);
  33   } else {
  34         printf("no message\n");
  35   }
  36   printf("\n");
  37
  38   printf("syslib:panic.c: stacktrace: ");
  39   util_stacktrace();
  40
  41   /* Try exit */
  42   _exit(1);
  43
  44 #ifndef __NBSD_LIBC
  45   /* Try to signal ourself */
  46   abort();
  47 #endif
  48
  49   /* If exiting nicely through PM fails for some reason, try to
  50    * commit suicide. E.g., message to PM might fail due to deadlock.
  51    */
  52   suicide = (void (*)(void)) -1;
  53   suicide();
  54
  55   /* If committing suicide fails for some reason, hang. */
  56   for(;;) { }
  57 }
  58