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1/* Copyright (C) 1990-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Torbjorn Granlund (tege@sics.se).
4
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.
9
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.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <stdlib.h>
20#include <stdio.h>
21#include <string.h>
22#include <support/support.h>
23
24static int
25do_test (void)
26{
27 char *mem, *memp;
28 char *rand_mem;
29 char *lo_around, *hi_around;
30 int size, max_size;
31 int src_off, dst_off;
32 int i;
33 int space_around = 10;
34
35 max_size = 256;
36
37 mem = xmalloc (max_size + 2 * max_size + 2 * space_around);
38 rand_mem = xmalloc (max_size);
39 lo_around = xmalloc (space_around);
40 hi_around = xmalloc (space_around);
41 memp = mem + space_around;
42
43 /* Fill RAND_MEM with random bytes, each non-zero. */
44 for (i = 0; i < max_size; i++)
45 {
46 int x;
47 do
48 x = random ();
49 while (x == 0);
50 rand_mem[i] = x;
51 }
52
53 for (size = 0; size < max_size; size++)
54 {
55 printf("phase %d\n", size);
56 for (src_off = 0; src_off <= 16; src_off++)
57 {
58 for (dst_off = 0; dst_off <= 16; dst_off++)
59 {
60 /* Put zero around the intended destination, to check
61 that it's not clobbered. */
62 for (i = 1; i < space_around; i++)
63 {
64 memp[dst_off - i] = 0;
65 memp[dst_off + size - 1 + i] = 0;
66 }
67
68 /* Fill the source area with known contents. */
69 for (i = 0; i < size; i++)
70 memp[src_off + i] = rand_mem[i];
71
72 /* Remember the contents around the destination area.
73 (It might not be what we wrote some lines above, since
74 the src area and the dst area overlap.) */
75 for (i = 1; i < space_around; i++)
76 {
77 lo_around[i] = memp[dst_off - i];
78 hi_around[i] = memp[dst_off + size - 1 + i];
79 }
80
81 memmove (memp + dst_off, memp + src_off, size);
82
83 /* Check that the destination area has the same
84 contents we wrote to the source area. */
85 for (i = 0; i < size; i++)
86 {
87 if (memp[dst_off + i] != rand_mem[i])
88 abort ();
89 }
90
91 /* Check that the area around the destination is not
92 clobbered. */
93 for (i = 1; i < space_around; i++)
94 {
95 if (memp[dst_off - i] != lo_around[i])
96 abort ();
97 if (memp[dst_off + size - 1 + i] != hi_around[i])
98 abort ();
99 }
100 }
101 }
102 }
103
104 puts ("Test succeeded.");
105
106 return 0;
107}
108
109#include <support/test-driver.c>
110

Warning: That file was not part of the compilation database. It may have many parsing errors.