Annotation of prex/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: }
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