| 1 | // large_symbol_alignment.cc -- a test case for gold |
| 2 | |
| 3 | // Copyright (C) 2013-2020 Free Software Foundation, Inc. |
| 4 | // Written by Alexander Ivchenko <alexander.ivchenko@intel.com>. |
| 5 | |
| 6 | // This file is part of gold. |
| 7 | |
| 8 | // This program is free software; you can redistribute it and/or modify |
| 9 | // it under the terms of the GNU General Public License as published by |
| 10 | // the Free Software Foundation; either version 3 of the License, or |
| 11 | // (at your option) any later version. |
| 12 | |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | // MA 02110-1301, USA. |
| 22 | |
| 23 | // The goal of this program is to verify that Gold correctly aligns |
| 24 | // the symbol with a large alignemnt (often larger than the page size). |
| 25 | |
| 26 | #include <stdint.h> |
| 27 | |
| 28 | __attribute__ ((aligned(8192))) int aligned_8k_var; |
| 29 | __attribute__ ((aligned(4096))) int aligned_4k_var; |
| 30 | __attribute__ ((aligned(16384))) int aligned_16k_var; |
| 31 | |
| 32 | bool |
| 33 | is_aligned(const int& var, int align) __attribute__((noinline)); |
| 34 | |
| 35 | bool |
| 36 | is_aligned(const int& var, int align) |
| 37 | { |
| 38 | return (reinterpret_cast<uintptr_t>(&var) & (align - 1)) == 0; |
| 39 | } |
| 40 | |
| 41 | int |
| 42 | main() |
| 43 | { |
| 44 | if (!is_aligned(aligned_16k_var, 16384) |
| 45 | || !is_aligned(aligned_8k_var, 8192) |
| 46 | || !is_aligned(aligned_4k_var, 4096)) |
| 47 | return 1; |
| 48 | return 0; |
| 49 | } |