Re: [Boost-bugs] [Boost C++ Libraries] #7666: Boost Thread SIGSEGV on join() when -D_GLIBCXX_DEBUG is used

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7666: Boost Thread SIGSEGV on join() when -D_GLIBCXX_DEBUG is used
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-09-23 22:02:10

#7666: Boost Thread SIGSEGV on join() when -D_GLIBCXX_DEBUG is used
-------------------------------------+-------------------------------------
  Reporter:  Antonio Di Monaco       |      Owner:  viboes
  <tony@…>                           |     Status:  assigned
      Type:  Bugs                    |  Component:  thread
 Milestone:  To Be Determined        |   Severity:  Problem
   Version:  Boost 1.52.0            |   Keywords:  thread SIGSEGV C++11
Resolution:                          |  -D_GLIBCXX_DEBUG
-------------------------------------+-------------------------------------

Comment (by Chris Kogelnik):

 I'm also seeing a Seg Fault on OS X 10.8 and boost 1.54 (and earlier) when
 issuing a thread.join().   A large project was previously working
 correctly until XCode was upgraded from 4 to 5.  Reduced the case and
 traced it back to a compiler setting:
    -stdlib=libc++  causes the crash

    -stdlib=libstdc++  works fine

 The DEBUG flag had nothing to do with it in this case.

 Hope this helps your debugging.


 There is the example, thread.cpp:

 {{{
 #include <stdio.h>
 #include <stdlib.h>
 #include <boost/thread.hpp>
 #include <time.h>
 #include <unistd.h>

 using namespace std;

 void
 t1() {
   while (loop) {
     sleep(1);
   }
   printf("exiting\n");
   fflush(stdout);
 }

 int
 main() {
   int loop = 1;
   boost::thread t1_thread;

   t1_thread = boost::thread(t1);
   loop = 0;
   t1_thread.join();
 }
 }}}

 The Makefile:
 {{{
 OPT_FAIL = -stdlib=libc++
 OPT_PASS = -stdlib=libstdc++

 thread: thread.cpp Makefile
   g++ -o thread thread.cpp -lboost_system -lboost_thread $(OPT_FAIL)
 }}}


 And the stack trace:
 {{{
 #0  boost::shared_ptr<boost::detail::future_object_base>::operator-> () at
 /boost_1_54_0/boost/smart_ptr/shared_ptr.hpp:652
 #1  0x00000001038788c0 in
 boost::detail::thread_data_base::~thread_data_base (this=0x7fddbb403aa0)
 at libs/thread/src/pthread/thread.cpp:47
 #2  0x000000010384a235 in boost::detail::thread_data<void
 (*)()>::~thread_data ()
 #3  0x00000001038493e5 in boost::detail::thread_data<void
 (*)()>::~thread_data ()
 #4  0x0000000103849408 in boost::detail::thread_data<void
 (*)()>::~thread_data ()
 #5  0x000000010384b62e in
 boost::checked_delete<boost::detail::thread_data<void (*)()> > ()
 #6  0x000000010384b749 in
 boost::detail::sp_counted_impl_p<boost::detail::thread_data<void (*)()>
 >::dispose ()
 #7  0x000000010387955d in boost::detail::atomic_exchange_and_add () at
 /boost_1_54_0/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp:146
 #8  0x000000010387955d in boost::detail::sp_counted_base::weak_release ()
 at /boost_1_54_0/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp:158
 #9  0x000000010387955d in boost::detail::sp_counted_base::release () at
 sp_counted_base_gcc_x86.hpp:147
 #10 0x000000010387955d in boost::detail::shared_count::~shared_count () at
 sp_counted_base_gcc_x86.hpp:371
 #11 0x000000010387955d in
 boost::shared_ptr<boost::detail::thread_data_base>::~shared_ptr () at
 sp_counted_base_gcc_x86.hpp:370
 #12 0x000000010387955d in
 boost::shared_ptr<boost::detail::thread_data_base>::~shared_ptr () at
 /boost_1_54_0/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp:722
 #13 0x000000010387955d in boost::thread::join_noexcept (this=<value
 temporarily unavailable, due to optimizations>) at
 sp_counted_base_gcc_x86.hpp:338
 #14 0x0000000103847344 in boost::thread::join ()
 #15 0x0000000103846688 in main ()
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7666#comment:33>
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