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/* $OpenBSD */
/*
* Copyright (c) 2017 Otto Moerbeek <otto@drijf.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* $define VERBOSE */
#define N 1000
size_t size(void)
{
int p = arc4random_uniform(13) + 3;
return arc4random_uniform(1 << p);
}
void *a[N];
extern char *malloc_options;
int
main(int argc, char *argv[])
{
int count, p, i;
void * q;
size_t sz;
if (argc == 1)
errx(1, "usage: malloc_options");
malloc_options = argv[1];
for (count = 0; count < 800000; count++) {
if (count % 10000 == 0) {
printf(".");
fflush(stdout);
}
p = arc4random_uniform(2);
i = arc4random_uniform(N);
switch (p) {
case 0:
if (a[i]) {
#ifdef VERBOSE
printf("F %p\n", a[i]);
#endif
free(a[i]);
a[i] = NULL;
}
sz = size();
#ifdef VERBOSE
printf("M %zu=", sz);
#endif
a[i] = malloc(sz);
#ifdef VERBOSE
printf("%p\n", a[i]);
#endif
if (a[i])
memset(a[i], 0xff, sz);
break;
case 1:
sz = size();
#ifdef VERBOSE
printf("R %p %zu=", a[i], sz);
#endif
q = realloc(a[i], sz);
#ifdef VERBOSE
printf("%p\n", q);
#endif
if (q) {
a[i]= q;
if (a[i])
memset(a[i], 0xff, sz);
}
break;
}
}
for (i = 0; i < N; i++)
free(a[i]);
printf("\n");
return 0;
}
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