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1a1a6bde | 1 | /* Test for large alignment in TLS blocks (extern case), BZ#18383. |
688903eb | 2 | Copyright (C) 2015-2018 Free Software Foundation, Inc. |
1a1a6bde RM |
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 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <stdint.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | ||
23 | /* This is the same as tst-tlsalign-static.c, except that it uses | |
24 | TLS variables that are defined in a separate translation unit | |
25 | (ts-tlsalign-vars.c). It turned out that the cause of BZ#18383 | |
26 | on ARM was actually an ARM assembler bug triggered by the ways of | |
27 | using .tdata/.tbss sections and relocs referring to them that GCC | |
28 | chooses when the variables are defined in the same translation | |
29 | unit that contains the references. */ | |
30 | ||
31 | extern __thread int tdata1; | |
32 | extern __thread int tdata2; | |
33 | extern __thread int tdata3; | |
34 | extern __thread int tbss1; | |
35 | extern __thread int tbss2; | |
36 | extern __thread int tbss3; | |
37 | ||
38 | static int | |
39 | test_one (const char *which, unsigned int alignment, int *var, int value) | |
40 | { | |
41 | uintptr_t addr = (uintptr_t) var; | |
42 | unsigned int misalign = addr & (alignment - 1); | |
43 | ||
44 | printf ("%s TLS address %p %% %u = %u\n", | |
45 | which, (void *) var, alignment, misalign); | |
46 | ||
47 | int got = *var; | |
48 | if (got != value) | |
49 | { | |
50 | printf ("%s value %d should be %d\n", which, got, value); | |
51 | return 1; | |
52 | } | |
53 | ||
54 | return misalign != 0; | |
55 | } | |
56 | ||
57 | static int | |
58 | do_test (void) | |
59 | { | |
60 | int fail = 0; | |
61 | ||
62 | fail |= test_one ("tdata1", 4, &tdata1, 1); | |
63 | fail |= test_one ("tdata2", 0x10, &tdata2, 2); | |
64 | fail |= test_one ("tdata3", 0x1000, &tdata3, 4); | |
65 | ||
66 | fail |= test_one ("tbss1", 4, &tbss1, 0); | |
67 | fail |= test_one ("tbss2", 0x10, &tbss2, 0); | |
68 | fail |= test_one ("tbss3", 0x1000, &tbss3, 0); | |
69 | ||
70 | return fail ? EXIT_FAILURE : EXIT_SUCCESS; | |
71 | } | |
72 | ||
36fe25fd | 73 | #include <support/test-driver.c> |