libstdc++-v3/testsuite/27_io/ios_base/storage/11584.cc

   1 // { dg-xfail-run-if "AIX operator new" { powerpc-ibm-aix* } }
   2
   3 // 2004-01-25 jlquinn@gcc.gnu.org
   4
   5 // Copyright (C) 2004-2016 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library 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 along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 27.4.2.5 ios_base storage functions
  23
  24 #include <cstdlib>
  25 #include <new>
  26 #include <iostream>
  27 #include <testsuite_hooks.h>
  28
  29 int new_fails;
  30
  31 void* operator new(std::size_t n, const std::nothrow_t&) throw()
  32 {
  33   if (new_fails)
  34     return 0;
  35   return malloc(n);
  36 }
  37 void* operator new[] (std::size_t n, const std::nothrow_t& ntt) throw()
  38 { return operator new(n, ntt); }
  39
  40 void operator delete (void *p) throw() { free(p); }
  41 void operator delete[] (void *p) throw() { operator delete(p); }
  42
  43 int main ()
  44 {
  45   const int i = std::ios::xalloc();
  46   VERIFY( i >= 0 );
  47
  48   new_fails = 1;
  49
  50   // Successive accesses to failure storage clears to zero.
  51   std::cout.iword(100) = 69;
  52   VERIFY( std::cout.iword(100) == 0 );
  53
  54   // Access to pword failure storage shouldn't clear iword pword storage.
  55   long& lr = std::cout.iword(100);
  56   lr = 69;
  57
  58   void* pv = std::cout.pword(100);
  59   VERIFY( pv == 0 );
  60   VERIFY( lr == 69 );
  61
  62   return 0;
  63 }
  64