gold/testsuite/large_symbol_alignment.cc

   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 }