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