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, 2004, 2005, 2006, 2007, 2009
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* mips-sgi-irix6* } }
  22 // { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* mips-sgi-irix6* } }
  23 // { dg-options "-pthreads" { target *-*-solaris* } }
  24
  25 #include <ext/rope>
  26 #include <cstring>
  27 #include <pthread.h>
  28 #include <testsuite_hooks.h>
  29
  30 const int max_thread_count = 4;
  31 const int max_loop_count = 10000;
  32
  33 typedef __gnu_cxx::rope<char, std::allocator<char> > rope_type;
  34 rope_type foo2;
  35 rope_type foo4;
  36
  37 void* thread_main(void *)
  38 {
  39   // To see a problem with gcc 3.3 and before, set a break point here.
  40   // Single step through c_str implementation, call sched_yield after
  41   // capture of NULL __old_c_string in any thread.  Single step
  42   // through another thread past that same point.  Now, one thread
  43   // will receive a bad pointer return.  Adding dummy sched_yield
  44   // should never change program semantics under POSIX threads.
  45   const char* data4 = foo4.c_str();
  46
  47   // Please note that the memory leak in the rope implementation with
  48   // this test case, existed before and after fixing this bug...
  49   bool test __attribute__((unused)) = true;
  50   VERIFY( !std::strcmp (data4, "barbazbonglehellohellohello") );
  51   return 0;
  52 }
  53
  54 int
  55 main()
  56 {
  57   bool test __attribute__((unused)) = true;
  58
  59   pthread_t tid[max_thread_count];
  60
  61 #if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
  62   pthread_setconcurrency (max_thread_count);
  63 #endif
  64
  65   rope_type foo;
  66   foo += "bar";
  67   foo += "baz";
  68   foo += "bongle";
  69   const char* data = foo.c_str();
  70   VERIFY( !std::strcmp (data, "barbazbongle") );
  71
  72   const char* data2;
  73   {
  74     foo2 += "bar2";
  75     foo2 += "baz2";
  76     foo2 += "bongle2";
  77     data2 = foo2.c_str();
  78     VERIFY( !std::strcmp (data2, "bar2baz2bongle2") );
  79   }
  80
  81   rope_type foo3 ("hello");
  82   const char* data3 = foo3.c_str();
  83   VERIFY( !std::strcmp (data3, "hello") );
  84
  85   for (int j = 0; j < max_loop_count; j++)
  86     {
  87       foo4 = foo;
  88       foo4 += foo3;
  89       foo4 += foo3;
  90       foo4 += foo3;
  91
  92       for (int i = 0; i < max_thread_count; i++)
  93         pthread_create (&tid[i], NULL, thread_main, 0);
  94
  95       for (int i = 0; i < max_thread_count; i++)
  96         pthread_join (tid[i], NULL);
  97     }
  98
  99   VERIFY( !std::strcmp (data, "barbazbongle") );
 100   VERIFY( !std::strcmp (data2, "bar2baz2bongle2") );
 101
 102   return 0;
 103 }