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Annotation of prex-old/usr/test/malloc/malloc.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Copyright (c) 2005, Kohsuke Ohtani
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: /*
        !            31:  * malloc.c - malloc test program.
        !            32:  */
        !            33:
        !            34: #include <stdlib.h>
        !            35: #include <stdio.h>
        !            36:
        !            37: #define NR_ALLOCS      30
        !            38:
        !            39: static void *ptr[NR_ALLOCS];
        !            40:
        !            41: static char *
        !            42: alloc(int buflen)
        !            43: {
        !            44:        char *p, *q;
        !            45:        int i;
        !            46:
        !            47:        printf("Allocate %d bytes - ", buflen);
        !            48:
        !            49:        p = malloc(buflen);
        !            50:        if (p == NULL) {
        !            51:                printf("Error: malloc() returns NULL!\n");
        !            52:                return NULL;
        !            53:        }
        !            54:        for (q = p, i = 0; i < buflen; i++)
        !            55:                *(q++) = '@';
        !            56: #if 0
        !            57:        for (q = p, i = 0; i < buflen; i++)
        !            58:                putchar(*(q++));
        !            59: #endif
        !            60:        printf("OK!\n");
        !            61:        return p;
        !            62: }
        !            63:
        !            64: static void
        !            65: test_1(void)
        !            66: {
        !            67:        char *p;
        !            68:
        !            69:        printf("test_1 - start\n");
        !            70:
        !            71:        p = alloc(1);
        !            72:        free(p);
        !            73:        p = alloc(2);
        !            74:        free(p);
        !            75:        p = alloc(256);
        !            76:        free(p);
        !            77:        p = alloc(1024);
        !            78:        free(p);
        !            79:        p = alloc(8096);
        !            80:        free(p);
        !            81:        p = alloc(-1);
        !            82:        free(p);
        !            83:
        !            84:        printf("test_1 - done\n");
        !            85: }
        !            86:
        !            87: static void
        !            88: test_2(void)
        !            89: {
        !            90:        int i, j;
        !            91:
        !            92:        printf("test_2 - start\n");
        !            93:
        !            94:        for (i = 0; i < NR_ALLOCS; i++)
        !            95:                ptr[i] = alloc(random() & 0xf);
        !            96:        for (i = 0; i < NR_ALLOCS; i++)
        !            97:                free(ptr[i]);
        !            98:
        !            99:        for (i = 0; i < NR_ALLOCS; i++)
        !           100:                ptr[i] = alloc(random() & 0xff);
        !           101:        for (i = 0; i < NR_ALLOCS; i++)
        !           102:                free(ptr[i]);
        !           103:
        !           104:        for (i = 0; i < NR_ALLOCS; i++)
        !           105:                ptr[i] = alloc(random() & 0xfff);
        !           106:        for (i = 0; i < NR_ALLOCS; i++)
        !           107:                free(ptr[i]);
        !           108:
        !           109:        for (i = 0; i < NR_ALLOCS; i++)
        !           110:                ptr[i] = alloc(random() & 0xfff);
        !           111:        for (i = 0; i < 10000; i++) {
        !           112:                j = random() % NR_ALLOCS;
        !           113:                if (ptr[j] != NULL) {
        !           114:                        free(ptr[j]);
        !           115:                        ptr[j] = NULL;
        !           116:                }
        !           117:        }
        !           118:        printf("test_2 - done\n");
        !           119: }
        !           120:
        !           121: static void
        !           122: test_3(void)
        !           123: {
        !           124:        char *p;
        !           125:
        !           126:        printf("test_3 - start\n");
        !           127:
        !           128:        p = alloc(256);
        !           129:        free(p);
        !           130:
        !           131:        printf("test_3 - try to free invalid area...\n");
        !           132:        free(p); /* invalid */
        !           133:
        !           134:        printf("test_3 - done!?\n");
        !           135: }
        !           136:
        !           137: int
        !           138: main(int argc, char *argv[])
        !           139: {
        !           140:        printf("Malloc test program.\n");
        !           141:
        !           142:        test_1();
        !           143:        test_2();
        !           144:        test_3();
        !           145:
        !           146:        return 0;
        !           147: }