diff options
Diffstat (limited to 'REORG.TODO/elf/tst-tlsalign.c')
| -rw-r--r-- | REORG.TODO/elf/tst-tlsalign.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/REORG.TODO/elf/tst-tlsalign.c b/REORG.TODO/elf/tst-tlsalign.c new file mode 100644 index 0000000000..b129ebda0e --- /dev/null +++ b/REORG.TODO/elf/tst-tlsalign.c @@ -0,0 +1,84 @@ +/* Test for large alignment in TLS blocks, BZ#18383. + Copyright (C) 2015-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> + +static __thread int tdata1 = 1; +static __thread int tdata2 __attribute__ ((aligned (0x10))) = 2; +static __thread int tdata3 __attribute__ ((aligned (0x1000))) = 4; +static __thread int tbss1; +static __thread int tbss2 __attribute__ ((aligned (0x10))); +static __thread int tbss3 __attribute__ ((aligned (0x1000))); + +#ifndef NO_LIB +extern __thread int mod_tdata1; +extern __thread int mod_tdata2; +extern __thread int mod_tdata3; +extern __thread int mod_tbss1; +extern __thread int mod_tbss2; +extern __thread int mod_tbss3; +#endif + +static int +test_one (const char *which, unsigned int alignment, int *var, int value) +{ + uintptr_t addr = (uintptr_t) var; + unsigned int misalign = addr & (alignment - 1); + + printf ("%s TLS address %p %% %u = %u\n", + which, (void *) var, alignment, misalign); + + int got = *var; + if (got != value) + { + printf ("%s value %d should be %d\n", which, got, value); + return 1; + } + + return misalign != 0; +} + +static int +do_test (void) +{ + int fail = 0; + + fail |= test_one ("tdata1", 4, &tdata1, 1); + fail |= test_one ("tdata2", 0x10, &tdata2, 2); + fail |= test_one ("tdata3", 0x1000, &tdata3, 4); + + fail |= test_one ("tbss1", 4, &tbss1, 0); + fail |= test_one ("tbss2", 0x10, &tbss2, 0); + fail |= test_one ("tbss3", 0x1000, &tbss3, 0); + +#ifndef NO_LIB + fail |= test_one ("mod_tdata1", 4, &mod_tdata1, 1); + fail |= test_one ("mod_tdata2", 0x10, &mod_tdata2, 2); + fail |= test_one ("mod_tdata3", 0x1000, &mod_tdata3, 4); + + fail |= test_one ("mod_tbss1", 4, &mod_tbss1, 0); + fail |= test_one ("mod_tbss2", 0x10, &mod_tbss2, 0); + fail |= test_one ("mod_tbss3", 0x1000, &mod_tbss3, 0); +#endif + + return fail ? EXIT_FAILURE : EXIT_SUCCESS; +} + +#include <support/test-driver.c> |