1 | /* Test for large alignment in TLS blocks, BZ#18383. |
2 | Copyright (C) 2015-2022 Free Software Foundation, Inc. |
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 |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <stdint.h> |
20 | #include <stdio.h> |
21 | #include <stdlib.h> |
22 | |
23 | static __thread int tdata1 = 1; |
24 | static __thread int tdata2 __attribute__ ((aligned (0x10))) = 2; |
25 | static __thread int tdata3 __attribute__ ((aligned (0x1000))) = 4; |
26 | static __thread int tbss1; |
27 | static __thread int tbss2 __attribute__ ((aligned (0x10))); |
28 | static __thread int tbss3 __attribute__ ((aligned (0x1000))); |
29 | |
30 | #ifndef NO_LIB |
31 | extern __thread int mod_tdata1; |
32 | extern __thread int mod_tdata2; |
33 | extern __thread int mod_tdata3; |
34 | extern __thread int mod_tbss1; |
35 | extern __thread int mod_tbss2; |
36 | extern __thread int mod_tbss3; |
37 | #endif |
38 | |
39 | static int |
40 | test_one (const char *which, unsigned int alignment, int *var, int value) |
41 | { |
42 | uintptr_t addr = (uintptr_t) var; |
43 | unsigned int misalign = addr & (alignment - 1); |
44 | |
45 | printf (format: "%s TLS address %p %% %u = %u\n" , |
46 | which, (void *) var, alignment, misalign); |
47 | |
48 | int got = *var; |
49 | if (got != value) |
50 | { |
51 | printf (format: "%s value %d should be %d\n" , which, got, value); |
52 | return 1; |
53 | } |
54 | |
55 | return misalign != 0; |
56 | } |
57 | |
58 | static int |
59 | do_test (void) |
60 | { |
61 | int fail = 0; |
62 | |
63 | fail |= test_one (which: "tdata1" , alignment: 4, var: &tdata1, value: 1); |
64 | fail |= test_one (which: "tdata2" , alignment: 0x10, var: &tdata2, value: 2); |
65 | fail |= test_one (which: "tdata3" , alignment: 0x1000, var: &tdata3, value: 4); |
66 | |
67 | fail |= test_one (which: "tbss1" , alignment: 4, var: &tbss1, value: 0); |
68 | fail |= test_one (which: "tbss2" , alignment: 0x10, var: &tbss2, value: 0); |
69 | fail |= test_one (which: "tbss3" , alignment: 0x1000, var: &tbss3, value: 0); |
70 | |
71 | #ifndef NO_LIB |
72 | fail |= test_one ("mod_tdata1" , 4, &mod_tdata1, 1); |
73 | fail |= test_one ("mod_tdata2" , 0x10, &mod_tdata2, 2); |
74 | fail |= test_one ("mod_tdata3" , 0x1000, &mod_tdata3, 4); |
75 | |
76 | fail |= test_one ("mod_tbss1" , 4, &mod_tbss1, 0); |
77 | fail |= test_one ("mod_tbss2" , 0x10, &mod_tbss2, 0); |
78 | fail |= test_one ("mod_tbss3" , 0x1000, &mod_tbss3, 0); |
79 | #endif |
80 | |
81 | return fail ? EXIT_FAILURE : EXIT_SUCCESS; |
82 | } |
83 | |
84 | #include <support/test-driver.c> |
85 | |