gold/testsuite/icf_safe_so_test.cc

   1 // icf_safe_so_test.cc -- a test case for gold
   2
   3 // Copyright (C) 2010-2020 Free Software Foundation, Inc.
   4 // Written by Sriraman Tallam <tmsriram@google.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 if identical code folding
  24 // in safe mode correctly folds functions in a shared object. The
  25 // foo_* functions below should not be folded on X86_64.
  26 // For 32-bit X86, the hidden protected and internal symbols can be folded.
  27 // foo_glob and bar_glob should not be folded, because function pointer
  28 // of foo_glob is taken.
  29
  30 int  __attribute__ ((visibility ("protected")))
  31 foo_prot()
  32 {
  33   return 1;
  34 }
  35
  36 int __attribute__ ((visibility ("hidden")))
  37 foo_hidden()
  38 {
  39   return 1;
  40 }
  41
  42 int __attribute__ ((visibility ("internal")))
  43 foo_internal()
  44 {
  45   return 1;
  46 }
  47
  48 static int
  49 foo_static()
  50 {
  51   return 1;
  52 }
  53
  54 int foo_glob()
  55 {
  56   return 2;
  57 }
  58
  59 int bar_glob()
  60 {
  61   return 2;
  62 }
  63
  64 int main()
  65 {
  66   int (*p)() = foo_glob;
  67   (void)p;
  68   foo_static();
  69   foo_prot();
  70   foo_hidden();
  71   foo_internal();
  72   return 0;
  73 }
  74