tools/test/malloc/main.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <unistd.h>
   4
   5 u_long NBUCKETS         = 2000;
   6 u_long NOPS             = 200000;
   7 u_long NSIZE            = (16*1024);
   8
   9 char **foo;
  10
  11 int
  12 main(int argc, char **argv)
  13 {
  14     int i,j,k;
  15
  16     if (argc > 1) NOPS     = strtoul(argv[1],0,0);
  17     if (argc > 2) NBUCKETS = strtoul(argv[2],0,0);
  18     if (argc > 3) NSIZE    = strtoul(argv[3],0,0);
  19     printf("BRK(0)=%x ",sbrk(0));
  20     foo = malloc (sizeof *foo * NBUCKETS);
  21     memset(foo,0,sizeof *foo * NBUCKETS);
  22     for (i = 1; i <= 4096; i+=i) {
  23         for (j = 0 ; j < 40960/i && j < NBUCKETS; j++) {
  24             foo[j] = malloc(i);
  25         }
  26         for (j = 0 ; j < 40960/i && j < NBUCKETS; j++) {
  27             free(foo[j]);
  28             foo[j] = NULL;
  29         }
  30     }
  31
  32     for (i = 0 ; i < NOPS ; i++) {
  33         j = random() % NBUCKETS;
  34         k = random() % NSIZE;
  35         foo[j] = realloc(foo[j], k & 1 ? 0 : k);
  36         if (foo[j])
  37             foo[j][0] = 1;
  38     }
  39     printf("BRK(1)=%x ",sbrk(0));
  40     for (j = 0 ; j < NBUCKETS ; j++) {
  41         if (foo[j]) {
  42             free(foo[j]);
  43             foo[j] = NULL;
  44         }
  45     }
  46     printf("BRK(2)=%x NOPS=%lu NBUCKETS=%lu NSIZE=%lu\n",
  47         sbrk(0),NOPS,NBUCKETS,NSIZE);
  48     return 0;
  49 }