scoutos / prex-0.9.0 / usr / test / malloc / malloc.c @ 03e9c04a
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/*
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* Copyright (c) 2005, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* malloc.c - malloc test program.
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#define NR_ALLOCS 30 |
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static void *ptr[NR_ALLOCS]; |
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static char * |
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alloc(int buflen)
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{ |
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char *p, *q;
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int i;
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printf("Allocate %d bytes - ", buflen);
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p = malloc((size_t)buflen); |
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if (p == NULL) { |
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printf("Error: malloc() returns NULL!\n");
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return NULL; |
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} |
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for (q = p, i = 0; i < buflen; i++) |
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*(q++) = '@';
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#if 0
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for (q = p, i = 0; i < buflen; i++)
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putchar(*(q++));
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#endif
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printf("OK!\n");
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return p;
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} |
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static void |
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test_1(void)
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{ |
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char *p;
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printf("test_1 - start\n");
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p = alloc(1);
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free(p); |
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p = alloc(2);
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free(p); |
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p = alloc(256);
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free(p); |
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p = alloc(1024);
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free(p); |
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p = alloc(8096);
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free(p); |
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p = alloc(-1);
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free(p); |
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printf("test_1 - done\n");
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} |
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static void |
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test_2(void)
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{ |
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int i, j;
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printf("test_2 - start\n");
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for (i = 0; i < NR_ALLOCS; i++) |
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ptr[i] = alloc(random() & 0xf);
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for (i = 0; i < NR_ALLOCS; i++) |
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free(ptr[i]); |
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for (i = 0; i < NR_ALLOCS; i++) |
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ptr[i] = alloc(random() & 0xff);
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for (i = 0; i < NR_ALLOCS; i++) |
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free(ptr[i]); |
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for (i = 0; i < NR_ALLOCS; i++) |
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ptr[i] = alloc(random() & 0xfff);
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for (i = 0; i < NR_ALLOCS; i++) |
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free(ptr[i]); |
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for (i = 0; i < NR_ALLOCS; i++) |
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ptr[i] = alloc(random() & 0xfff);
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for (i = 0; i < 10000; i++) { |
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j = random() % NR_ALLOCS; |
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if (ptr[j] != NULL) { |
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free(ptr[j]); |
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ptr[j] = NULL;
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} |
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} |
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printf("test_2 - done\n");
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} |
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static void |
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test_3(void)
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{ |
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char *p;
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printf("test_3 - start\n");
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p = alloc(256);
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free(p); |
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printf("test_3 - try to free invalid area...\n");
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free(p); /* invalid */
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printf("test_3 - done!?\n");
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} |
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int
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main(int argc, char *argv[]) |
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{ |
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printf("Malloc test program.\n");
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test_1(); |
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test_2(); |
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test_3(); |
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return 0; |
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} |