gold/testsuite/icf_virtual_function_folding_test.cc

   1 // icf_virtual_function_folding_test.cc -- a test case for gold
   2
   3 // Copyright 2010 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 #include <stdio.h>
  29
  30 int fn2(void *)
  31 {
  32   printf("fn1==fn2\n");
  33   return 0xA;
  34 }
  35
  36 namespace
  37 {
  38
  39 class Bar
  40 {
  41  public:
  42   virtual int fn1();
  43 };
  44
  45 int Bar::fn1()
  46 {
  47   return 123;
  48 }
  49
  50 class Foo : public Bar
  51 {
  52   virtual int fn1();
  53 };
  54
  55 int Foo::fn1()
  56 {
  57   printf("fn1==fn2\n");
  58   return 0xA;
  59 }
  60
  61 Bar* get()
  62 {
  63   Bar *f = new Foo();
  64   return f;
  65 }
  66
  67 } // end of anonymous namespace.
  68
  69 int main()
  70 {
  71   Bar *f = get();
  72   f->fn1();
  73   return 0;
  74 }