test/test64.c

   1
   2 /* Code to test reasonable response to out-of-memory condition
   3  * of regular processes.
   4  */
   5
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <dlfcn.h>
   9
  10 #include <sys/mman.h>
  11 #include <sys/wait.h>
  12
  13 #define MAX_ERROR 2
  14
  15 #include "magic.h"
  16 #include "common.c"
  17
  18 int main (int argc, char *argv[])
  19 {
  20   pid_t f;
  21   start(64);
  22 #define NADDRS 500
  23 #define LEN 4096
  24   static void *addrs[NADDRS];
  25   int i = 0;
  26   int st;
  27
  28   if((f=fork()) == -1) {
  29         e(1);
  30         exit(1);
  31   }
  32
  33   if(f == 0) {
  34         /* child: use up as much memory as we can */
  35         while((addrs[i++ % NADDRS] = minix_mmap(0, LEN, PROT_READ|PROT_WRITE,
  36                 MAP_PREALLOC|MAP_CONTIG|MAP_ANON, -1, 0)) != MAP_FAILED)
  37                         ;
  38         exit(0);
  39   }
  40
  41   /* parent: wait for child */
  42   if(waitpid(f, &st, 0) < 0)
  43         perror("waitpid");
  44
  45   quit();
  46
  47   return(0);
  48 }