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 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 "-D_GLIBCXX_ASSERT -pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* } }
  23 // { dg-options "-D_GLIBCXX_ASSERT -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 int
  57 main()
  58 {
  59   bool test __attribute__((unused)) = true;
  60
  61   pthread_t tid[max_thread_count];
  62
  63 #if defined(__sun) && defined(__svr4__)
  64   pthread_setconcurrency (max_thread_count);
  65 #endif
  66
  67   __gnu_cxx::crope foo;
  68   foo += "bar";
  69   foo += "baz";
  70   foo += "bongle";
  71   const char* data = foo.c_str();
  72   VERIFY( !std::strcmp (data, "barbazbongle") );
  73
  74   const char* data2;
  75   {
  76     __gnu_cxx::crope foo2;
  77     foo2 += "bar2";
  78     foo2 += "baz2";
  79     foo2 += "bongle2";
  80     data2 = foo2.c_str();
  81     VERIFY( !std::strcmp (data2, "bar2baz2bongle2") );
  82   }
  83
  84   __gnu_cxx::crope foo3 ("hello");
  85   const char* data3 = foo3.c_str();
  86   VERIFY( !std::strcmp (data3, "hello") );
  87
  88   for (int j = 0; j < max_loop_count; j++)
  89     {
  90       foo4 = foo;
  91       foo4 += foo3;
  92       foo4 += foo3;
  93       foo4 += foo3;
  94
  95       for (int i = 0; i < max_thread_count; i++)
  96         pthread_create (&tid[i], NULL, thread_main, 0);
  97
  98       for (int i = 0; i < max_thread_count; i++)
  99         pthread_join (tid[i], NULL);
 100     }
 101
 102   // Nothing says the data will be trashed at this point...
 103   VERIFY( std::strcmp (data2, "bar2baz2bongle2") );
 104
 105   return 0;
 106 }
 107 #else
 108 int main (void) {}
 109 #endif