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/* $FreeBSD$ */
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
u_long NBUCKETS = 2000;
u_long NOPS = 200000;
u_long NSIZE = (16*1024);
char **foo;
int
main(int argc, char **argv)
{
int i,j,k;
if (argc > 1) NOPS = strtoul(argv[1],0,0);
if (argc > 2) NBUCKETS = strtoul(argv[2],0,0);
if (argc > 3) NSIZE = strtoul(argv[3],0,0);
printf("BRK(0)=%x ",sbrk(0));
foo = malloc (sizeof *foo * NBUCKETS);
memset(foo,0,sizeof *foo * NBUCKETS);
for (i = 1; i <= 4096; i *= 2) {
for (j = 0 ; j < 40960/i && j < NBUCKETS; j++) {
foo[j] = malloc(i);
}
for (j = 0 ; j < 40960/i && j < NBUCKETS; j++) {
free(foo[j]);
foo[j] = 0;
}
}
for (i = 0 ; i < NOPS ; i++) {
j = random() % NBUCKETS;
k = random() % NSIZE;
foo[j] = realloc(foo[j], k & 1 ? 0 : k);
if (k & 1 || k == 0) {
/*
* Workaround because realloc return bogus pointer rather than
* NULL if passed zero length.
*/
foo[j] = 0;
}
if (foo[j])
foo[j][0] = 1;
}
printf("BRK(1)=%x ",sbrk(0));
for (j = 0 ; j < NBUCKETS ; j++) {
if (foo[j]) {
free(foo[j]);
foo[j] = 0;
}
}
printf("BRK(2)=%x NOPS=%lu NBUCKETS=%lu NSIZE=%lu\n",
sbrk(0),NOPS,NBUCKETS,NSIZE);
return 0;
}
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