Gammon Forum

#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define STATELEN    256             /* random number state buffer */

main()
{
 char randomStateBuffer[STATELEN];
 struct random_data randData;

 printf("Before initstate");
   /* seed the random number generator */
    initstate_r (time(NULL), (char *)&randomStateBuffer, STATELEN,
   (struct random_data *)&randData);
 printf("initstate done");

}

randData.state = (int32_t*)randomStateBuffer;

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

typedef struct random_data random_data;

int main() {
  char statebuf[256];
  random_data randomData;
  
  memset(&randomData, 0, sizeof(randomData));
  
  initstate_r(0, statebuf, 256, &randomData);
  return 0;
}

(gdb) run
Starting program: /home/p4r/a.out

Program received signal SIGSEGV, Segmentation fault.
0x40052c33 in initstate_r () from /lib/libc.so.6
(gdb) bt
#0  0x40052c33 in initstate_r () from /lib/libc.so.6
#1  0x080483f8 in main ()

p4r@zeno:~$ gcc -o test test.c
p4r@zeno:~$ gdb test
GNU gdb 6.3
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GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i486-slackware-linux"...Using host libthread_db library "/lib/libthread_db.so.1".

(gdb) run
Starting program: /home/p4r/test

Program received signal SIGSEGV, Segmentation fault.
0x40052c33 in initstate_r () from /lib/libc.so.6
(gdb) bt
#0  0x40052c33 in initstate_r () from /lib/libc.so.6
#1  0x080483f8 in main ()
(gdb)

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

int main() {
  char statebuf[256];
  struct random_data randomData;

  memset(&randomData, 0, sizeof(randomData));

  initstate_r(0, statebuf, sizeof(statebuf), &randomData);
  printf("initstate done\n");
  return 0;
}