1 /* Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc.
2 Contributed by Torbjorn Granlund (tege@sics.se).
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If
18 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
19 Cambridge, MA 02139, USA. */
27 DEFUN(main, (argc, argv),
28 int argc AND char **argv)
32 char *lo_around, *hi_around;
36 int space_around = 10;
40 mem = malloc (max_size + 2 * max_size + 2 * space_around);
41 rand_mem = malloc (max_size);
42 lo_around = malloc (space_around);
43 hi_around = malloc (space_around);
44 memp = mem + space_around;
46 /* Fill RAND_MEM with random bytes, each non-zero. */
47 for (i = 0; i < max_size; i++)
56 for (size = 0; size < max_size; size++)
58 printf("phase %d\n", size);
59 for (src_off = 0; src_off <= 16; src_off++)
61 for (dst_off = 0; dst_off <= 16; dst_off++)
63 /* Put zero around the intended destination, to check
64 that it's not clobbered. */
65 for (i = 1; i < space_around; i++)
67 memp[dst_off - i] = 0;
68 memp[dst_off + size - 1 + i] = 0;
71 /* Fill the source area with known contents. */
72 for (i = 0; i < size; i++)
73 memp[src_off + i] = rand_mem[i];
75 /* Remember the contents around the destination area.
76 (It might not be what we wrote some lines above, since
77 the src area and the dst area overlap.) */
78 for (i = 1; i < space_around; i++)
80 lo_around[i] = memp[dst_off - i];
81 hi_around[i] = memp[dst_off + size - 1 + i];
84 memmove (memp + dst_off, memp + src_off, size);
86 /* Check that the destination area has the same
87 contents we wrote to the source area. */
88 for (i = 0; i < size; i++)
90 if (memp[dst_off + i] != rand_mem[i])
94 /* Check that the area around the detination is not
96 for (i = 1; i < space_around; i++)
98 if (memp[dst_off - i] != lo_around[i])
100 if (memp[dst_off + size - 1 + i] != hi_around[i])