File: [local] / prex / usr / test / malloc / malloc.c (download)
Revision 1.1.1.1 (vendor branch), Tue Aug 19 12:47:02 2008 UTC (16 years, 1 month ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_8_BASE, HEAD Changes since 1.1: +0 -0 lines
Initial import of Prex, Portable Real-time Embedded POSIX microkernel system.
I have totally new directions in my development (more focused on real hardware, not virtual one).
Old hacks are available in prex-old module. They will be carefully re-designed and merged soon.
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/*
* Copyright (c) 2005, Kohsuke Ohtani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* malloc.c - malloc test program.
*/
#include <stdlib.h>
#include <stdio.h>
#define NR_ALLOCS 30
static void *ptr[NR_ALLOCS];
static char *
alloc(int buflen)
{
char *p, *q;
int i;
printf("Allocate %d bytes - ", buflen);
p = malloc(buflen);
if (p == NULL) {
printf("Error: malloc() returns NULL!\n");
return NULL;
}
for (q = p, i = 0; i < buflen; i++)
*(q++) = '@';
#if 0
for (q = p, i = 0; i < buflen; i++)
putchar(*(q++));
#endif
printf("OK!\n");
return p;
}
static void
test_1(void)
{
char *p;
printf("test_1 - start\n");
p = alloc(1);
free(p);
p = alloc(2);
free(p);
p = alloc(256);
free(p);
p = alloc(1024);
free(p);
p = alloc(8096);
free(p);
p = alloc(-1);
free(p);
printf("test_1 - done\n");
}
static void
test_2(void)
{
int i, j;
printf("test_2 - start\n");
for (i = 0; i < NR_ALLOCS; i++)
ptr[i] = alloc(random() & 0xf);
for (i = 0; i < NR_ALLOCS; i++)
free(ptr[i]);
for (i = 0; i < NR_ALLOCS; i++)
ptr[i] = alloc(random() & 0xff);
for (i = 0; i < NR_ALLOCS; i++)
free(ptr[i]);
for (i = 0; i < NR_ALLOCS; i++)
ptr[i] = alloc(random() & 0xfff);
for (i = 0; i < NR_ALLOCS; i++)
free(ptr[i]);
for (i = 0; i < NR_ALLOCS; i++)
ptr[i] = alloc(random() & 0xfff);
for (i = 0; i < 10000; i++) {
j = random() % NR_ALLOCS;
if (ptr[j] != NULL) {
free(ptr[j]);
ptr[j] = NULL;
}
}
printf("test_2 - done\n");
}
static void
test_3(void)
{
char *p;
printf("test_3 - start\n");
p = alloc(256);
free(p);
printf("test_3 - try to free invalid area...\n");
free(p); /* invalid */
printf("test_3 - done!?\n");
}
int
main(int argc, char *argv[])
{
printf("Malloc test program.\n");
test_1();
test_2();
test_3();
return 0;
}