gold/testsuite/icf_virtual_function_folding_test.cc

   1 // icf_virtual_function_folding_test.cc -- a test case for gold
   2
   3 // Copyright (C) 2010-2017 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 // Foo::fn1 is folded into fn2 with ICF.  Since this file is linked as a
  24 // position independent executable, a dynamic reloc is needed
  25 // for the virtual call fn1 entry in the vtable.  This test makes sure
  26 // the call to Foo::fn1 works correctly after the folding.
  27
  28 int fn2(void *)
  29 {
  30   return 0xA;
  31 }
  32
  33 namespace
  34 {
  35
  36 class Bar
  37 {
  38  public:
  39   virtual ~Bar() { }
  40   virtual int fn1();
  41 };
  42
  43 int Bar::fn1()
  44 {
  45   return 123;
  46 }
  47
  48 class Foo : public Bar
  49 {
  50   virtual int fn1();
  51 };
  52
  53 int Foo::fn1()
  54 {
  55   return 0xA;
  56 }
  57
  58 Bar* get()
  59 {
  60   Bar *f = new Foo();
  61   return f;
  62 }
  63
  64 } // end of anonymous namespace.
  65
  66 int main()
  67 {
  68   Bar *f = get();
  69   f->fn1();
  70   return 0;
  71 }