1 /* Copyright (C) 1990, 1991, 1992, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Torbjorn Granlund (tege@sics.se).
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
30 char *lo_around, *hi_around;
34 int space_around = 10;
38 mem = malloc (max_size + 2 * max_size + 2 * space_around);
39 rand_mem = malloc (max_size);
40 lo_around = malloc (space_around);
41 hi_around = malloc (space_around);
42 memp = mem + space_around;
44 /* Fill RAND_MEM with random bytes, each non-zero. */
45 for (i = 0; i < max_size; i++)
54 for (size = 0; size < max_size; size++)
56 printf("phase %d\n", size);
57 for (src_off = 0; src_off <= 16; src_off++)
59 for (dst_off = 0; dst_off <= 16; dst_off++)
61 /* Put zero around the intended destination, to check
62 that it's not clobbered. */
63 for (i = 1; i < space_around; i++)
65 memp[dst_off - i] = 0;
66 memp[dst_off + size - 1 + i] = 0;
69 /* Fill the source area with known contents. */
70 for (i = 0; i < size; i++)
71 memp[src_off + i] = rand_mem[i];
73 /* Remember the contents around the destination area.
74 (It might not be what we wrote some lines above, since
75 the src area and the dst area overlap.) */
76 for (i = 1; i < space_around; i++)
78 lo_around[i] = memp[dst_off - i];
79 hi_around[i] = memp[dst_off + size - 1 + i];
82 memmove (memp + dst_off, memp + src_off, size);
84 /* Check that the destination area has the same
85 contents we wrote to the source area. */
86 for (i = 0; i < size; i++)
88 if (memp[dst_off + i] != rand_mem[i])
92 /* Check that the area around the destination is not
94 for (i = 1; i < space_around; i++)
96 if (memp[dst_off - i] != lo_around[i])
98 if (memp[dst_off + size - 1 + i] != hi_around[i])
105 puts ("Test succeeded.");