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f5e7e959 | 1 | /* Tests for <support/blob_repeat.h> |
2b778ceb | 2 | Copyright (C) 2018-2021 Free Software Foundation, Inc. |
f5e7e959 FW |
3 | This file is part of the GNU C Library. |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
f5e7e959 FW |
18 | |
19 | #include <stdio.h> | |
0e28cfff | 20 | #include <string.h> |
f5e7e959 FW |
21 | #include <support/blob_repeat.h> |
22 | #include <support/check.h> | |
23 | ||
24 | static int | |
25 | do_test (void) | |
26 | { | |
27 | struct support_blob_repeat repeat | |
28 | = support_blob_repeat_allocate ("5", 1, 5); | |
29 | TEST_COMPARE_BLOB (repeat.start, repeat.size, "55555", 5); | |
30 | support_blob_repeat_free (&repeat); | |
31 | ||
32 | repeat = support_blob_repeat_allocate ("ABC", 3, 3); | |
33 | TEST_COMPARE_BLOB (repeat.start, repeat.size, "ABCABCABC", 9); | |
34 | support_blob_repeat_free (&repeat); | |
35 | ||
36 | repeat = support_blob_repeat_allocate ("abc", 4, 3); | |
37 | TEST_COMPARE_BLOB (repeat.start, repeat.size, "abc\0abc\0abc", 12); | |
38 | support_blob_repeat_free (&repeat); | |
39 | ||
40 | size_t gigabyte = 1U << 30; | |
41 | repeat = support_blob_repeat_allocate ("X", 1, gigabyte + 1); | |
42 | if (repeat.start == NULL) | |
43 | puts ("warning: not enough memory for 1 GiB mapping"); | |
44 | else | |
45 | { | |
46 | TEST_COMPARE (repeat.size, gigabyte + 1); | |
47 | { | |
48 | unsigned char *p = repeat.start; | |
49 | for (size_t i = 0; i < gigabyte + 1; ++i) | |
50 | if (p[i] != 'X') | |
51 | FAIL_EXIT1 ("invalid byte 0x%02x at %zu", p[i], i); | |
52 | ||
53 | /* Check that there is no sharing across the mapping. */ | |
54 | p[0] = 'Y'; | |
55 | p[1U << 24] = 'Z'; | |
56 | for (size_t i = 0; i < gigabyte + 1; ++i) | |
57 | if (i == 0) | |
58 | TEST_COMPARE (p[i], 'Y'); | |
59 | else if (i == 1U << 24) | |
60 | TEST_COMPARE (p[i], 'Z'); | |
61 | else if (p[i] != 'X') | |
62 | FAIL_EXIT1 ("invalid byte 0x%02x at %zu", p[i], i); | |
63 | } | |
64 | } | |
65 | support_blob_repeat_free (&repeat); | |
66 | ||
0e28cfff | 67 | for (int do_shared = 0; do_shared < 2; ++do_shared) |
f5e7e959 | 68 | { |
0e28cfff FW |
69 | if (do_shared) |
70 | repeat = support_blob_repeat_allocate_shared ("012345678", 9, | |
71 | 10 * 1000 * 1000); | |
72 | else | |
73 | repeat = support_blob_repeat_allocate ("012345678", 9, | |
74 | 10 * 1000 * 1000); | |
75 | if (repeat.start == NULL) | |
76 | puts ("warning: not enough memory for large mapping"); | |
77 | else | |
78 | { | |
79 | unsigned char *p = repeat.start; | |
80 | for (int i = 0; i < 10 * 1000 * 1000; ++i) | |
81 | for (int j = 0; j <= 8; ++j) | |
82 | if (p[i * 9 + j] != '0' + j) | |
83 | { | |
84 | printf ("error: element %d index %d\n", i, j); | |
85 | TEST_COMPARE (p[i * 9 + j], '0' + j); | |
86 | } | |
87 | ||
88 | enum { total_size = 9 * 10 * 1000 * 1000 }; | |
89 | p[total_size - 1] = '\0'; | |
90 | asm ("" ::: "memory"); | |
91 | if (do_shared) | |
92 | /* The write is repeated in multiple places earlier in the | |
93 | string due to page sharing. */ | |
94 | TEST_VERIFY (strlen (repeat.start) < total_size - 1); | |
95 | else | |
96 | TEST_COMPARE (strlen (repeat.start), total_size - 1); | |
97 | } | |
98 | support_blob_repeat_free (&repeat); | |
f5e7e959 | 99 | } |
f5e7e959 FW |
100 | |
101 | return 0; | |
102 | } | |
103 | ||
104 | #include <support/test-driver.c> |