| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Test for large alignment in TLS blocks (extern case), BZ#18383. |
| 2 | Copyright (C) 2015 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 | <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 | |
| 73 | #define TEST_FUNCTION do_test () |
| 74 | #include "../test-skeleton.c" |