libstdc++-v3/testsuite/thread/pthread7-rope.cc

   1 // 2003-05-03  Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
   2 //
   3 // Copyright (C) 2003, 2004 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10 //
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* } }
  22 // { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* } }
  23 // { dg-options "-pthreads" { target *-*-solaris* } }
  24
  25 #include <ext/rope>
  26 #include <cstring>
  27 #include <testsuite_hooks.h>
  28
  29 // Do not include <pthread.h> explicitly; if threads are properly
  30 // configured for the port, then it is picked up free from STL headers.
  31
  32 #if __GTHREADS
  33
  34 const int max_thread_count = 4;
  35 const int max_loop_count = 10000;
  36
  37 __gnu_cxx::crope foo4;
  38
  39 void* thread_main(void *)
  40 {
  41   // To see a problem with gcc 3.3 and before, set a break point here.
  42   // Single step through c_str implementation, call sched_yield after
  43   // capture of NULL __old_c_string in any thread.  Single step
  44   // through another thread past that same point.  Now, one thread
  45   // will receive a bad pointer return.  Adding dummy sched_yield
  46   // should never change program semantics under POSIX threads.
  47   const char* data4 = foo4.c_str();
  48
  49   // Please note that the memory leak in the rope implementation with
  50   // this test case, existed before and after fixing this bug...
  51   bool test __attribute__((unused)) = true;
  52   VERIFY( !std::strcmp (data4, "barbazbonglehellohellohello") );
  53   return 0;
  54 }
  55
  56 #if !__GXX_WEAK__ && _MT_ALLOCATOR_H
  57 // Explicitly instantiate for systems with no COMDAT or weak support.
  58 template class __gnu_cxx::__mt_alloc<__gnu_cxx::_Rope_RopeLeaf<char, std::allocator<char> > >;
  59 template class __gnu_cxx::__mt_alloc<__gnu_cxx::_Rope_RopeFunction<char, std::allocator<char> > >;
  60 template class __gnu_cxx::__mt_alloc<__gnu_cxx::_Rope_RopeSubstring<char, std::allocator<char> > >;
  61 template class __gnu_cxx::__mt_alloc<__gnu_cxx::_Rope_RopeConcatenation<char, std::allocator<char> > >;
  62 #endif
  63
  64 int
  65 main()
  66 {
  67   bool test __attribute__((unused)) = true;
  68
  69   pthread_t tid[max_thread_count];
  70
  71 #if defined(__sun) && defined(__svr4__)
  72   pthread_setconcurrency (max_thread_count);
  73 #endif
  74
  75   __gnu_cxx::crope foo;
  76   foo += "bar";
  77   foo += "baz";
  78   foo += "bongle";
  79   const char* data = foo.c_str();
  80   VERIFY( !std::strcmp (data, "barbazbongle") );
  81
  82   const char* data2;
  83   {
  84     __gnu_cxx::crope foo2;
  85     foo2 += "bar2";
  86     foo2 += "baz2";
  87     foo2 += "bongle2";
  88     data2 = foo2.c_str();
  89     VERIFY( !std::strcmp (data2, "bar2baz2bongle2") );
  90   }
  91
  92   __gnu_cxx::crope foo3 ("hello");
  93   const char* data3 = foo3.c_str();
  94   VERIFY( !std::strcmp (data3, "hello") );
  95
  96   for (int j = 0; j < max_loop_count; j++)
  97     {
  98       foo4 = foo;
  99       foo4 += foo3;
 100       foo4 += foo3;
 101       foo4 += foo3;
 102
 103       for (int i = 0; i < max_thread_count; i++)
 104         pthread_create (&tid[i], NULL, thread_main, 0);
 105
 106       for (int i = 0; i < max_thread_count; i++)
 107         pthread_join (tid[i], NULL);
 108     }
 109
 110   // Nothing says the data will be trashed at this point...
 111   VERIFY( std::strcmp (data2, "bar2baz2bongle2") );
 112
 113   return 0;
 114 }
 115 #else
 116 int main (void) {}
 117 #endif