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

   1 // 2003-05-03  Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
   2 //
   3 // Copyright (C) 2003-2019 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 3, 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 COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // { dg-do run }
  21 // { dg-options "-pthread"  }
  22 // { dg-require-effective-target pthread }
  23
  24 #include <ext/rope>
  25 #include <cstring>
  26 #include <pthread.h>
  27 #include <testsuite_hooks.h>
  28
  29 const int max_thread_count = 4;
  30 const int max_loop_count = 10000;
  31
  32 typedef __gnu_cxx::rope<char, std::allocator<char> > rope_type;
  33 rope_type foo2;
  34 rope_type foo4;
  35
  36 void* thread_main(void *)
  37 {
  38   // To see a problem with gcc 3.3 and before, set a break point here.
  39   // Single step through c_str implementation, call sched_yield after
  40   // capture of NULL __old_c_string in any thread.  Single step
  41   // through another thread past that same point.  Now, one thread
  42   // will receive a bad pointer return.  Adding dummy sched_yield
  43   // should never change program semantics under POSIX threads.
  44   const char* data4 = foo4.c_str();
  45
  46   // Please note that the memory leak in the rope implementation with
  47   // this test case, existed before and after fixing this bug...
  48   VERIFY( !std::strcmp (data4, "barbazbonglehellohellohello") );
  49   return 0;
  50 }
  51
  52 int
  53 main()
  54 {
  55   pthread_t tid[max_thread_count];
  56
  57 #if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
  58   pthread_setconcurrency (max_thread_count);
  59 #endif
  60
  61   rope_type foo;
  62   foo += "bar";
  63   foo += "baz";
  64   foo += "bongle";
  65   const char* data = foo.c_str();
  66   VERIFY( !std::strcmp (data, "barbazbongle") );
  67
  68   const char* data2;
  69   {
  70     foo2 += "bar2";
  71     foo2 += "baz2";
  72     foo2 += "bongle2";
  73     data2 = foo2.c_str();
  74     VERIFY( !std::strcmp (data2, "bar2baz2bongle2") );
  75   }
  76
  77   rope_type foo3 ("hello");
  78   const char* data3 = foo3.c_str();
  79   VERIFY( !std::strcmp (data3, "hello") );
  80
  81   for (int j = 0; j < max_loop_count; j++)
  82     {
  83       foo4 = foo;
  84       foo4 += foo3;
  85       foo4 += foo3;
  86       foo4 += foo3;
  87
  88       for (int i = 0; i < max_thread_count; i++)
  89         pthread_create (&tid[i], 0, thread_main, 0);
  90
  91       for (int i = 0; i < max_thread_count; i++)
  92         pthread_join (tid[i], 0);
  93     }
  94
  95   VERIFY( !std::strcmp (data, "barbazbongle") );
  96   VERIFY( !std::strcmp (data2, "bar2baz2bongle2") );
  97
  98   return 0;
  99 }