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 int max_error = 2;
  14 #include "common.h"
  15
  16
  17 #include "magic.h"
  18
  19 int main (int argc, char *argv[])
  20 {
  21   pid_t f;
  22   start(64);
  23 #define NADDRS 500
  24 #define LEN 4096
  25   static void *addrs[NADDRS];
  26   int i = 0;
  27   int st;
  28
  29   if((f=fork()) == -1) {
  30         e(1);
  31         exit(1);
  32   }
  33
  34   if(f == 0) {
  35         /* child: use up as much memory as we can */
  36         while((addrs[i++ % NADDRS] = mmap(0, LEN, PROT_READ|PROT_WRITE,
  37                 MAP_PREALLOC|MAP_CONTIG|MAP_ANON, -1, 0)) != MAP_FAILED)
  38                         ;
  39         exit(0);
  40   }
  41
  42   /* parent: wait for child */
  43   if(waitpid(f, &st, 0) < 0)
  44         perror("waitpid");
  45
  46   quit();
  47
  48   return(0);
  49 }