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: 2013-09-18 12:21:34

#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:  Boost 1.55.0            |   Severity:  Problem
   Version:  Boost 1.52.0            |   Keywords:  thread SIGSEGV C++11
Resolution:                          |  -D_GLIBCXX_DEBUG
-------------------------------------+-------------------------------------

Comment (by Antonio Di Monaco <tony@…>):

 Ok. Seems that the access to 0x0 is just when " i-> " is performed.


 {{{
 Breakpoint 1, 0x0040188c in
 boost::detail::thread_data_base::~thread_data_base()
  ()
 (gdb) s
 Single stepping until exit from function
 _ZN5boost6detail16thread_data_baseD2Ev,

 which has no line number information.
 boost::detail::thread_data_base::~thread_data_base (
     this=0x6ced3354 <libgcc_s_sjlj-1!_Unwind_SjLj_Register+116>,
     __in_chrg=<optimized out>) at libs\thread\src\win32\thread.cpp:40
 40          thread_data_base::~thread_data_base()
 (gdb)

 Breakpoint 1, boost::detail::thread_data_base::~thread_data_base (
     this=0x243330, __in_chrg=<optimized out>)
     at libs\thread\src\win32\thread.cpp:40
 40          thread_data_base::~thread_data_base()
 (gdb)
 42              for (notify_list_t::iterator i = notify.begin(), e =
 notify.end(
 );
 (gdb)
 std::vector<std::pair<boost::condition_variable*, boost::mutex*>,
 std::allocator
 <std::pair<boost::condition_variable*, boost::mutex*> > >::begin (
     this=0x24335c)
     at
 c:/x32-481-win32-sjlj-r2/lib/gcc/i686-w64-mingw32/4.8.1/include/c++/bits/
 stl_vector.h:539
 539           { return iterator(this->_M_impl._M_start); }
 (gdb) p _M_impl
 $3 = {<std::allocator<std::pair<boost::condition_variable*, boost::mutex*>
 >> =
 {<__gnu_cxx::new_allocator<std::pair<boost::condition_variable*,
 boost::mutex*>
 >> = {<No data fields>}, <No data fields>}, _M_start = 0x0,
   _M_finish = 0x1, _M_end_of_storage = 0x0}
 (gdb) s
 __gnu_cxx::__normal_iterator<std::pair<boost::condition_variable*,
 boost::mutex*
 >*, std::vector<std::pair<boost::condition_variable*, boost::mutex*>,
 std::alloc
 ator<std::pair<boost::condition_variable*, boost::mutex*> > >
 >::__normal_iterat
 or (this=0x22fbec, __i=@0x24335c: 0x0)
     at
 c:/x32-481-win32-sjlj-r2/lib/gcc/i686-w64-mingw32/4.8.1/include/c++/bits/
 stl_iterator.h:726
 726           __normal_iterator(const _Iterator& __i) : _M_current(__i) {
 }
 (gdb)
 std::vector<std::pair<boost::condition_variable*, boost::mutex*>,
 std::allocator
 <std::pair<boost::condition_variable*, boost::mutex*> > >::end (
     this=0x24335c)
     at
 c:/x32-481-win32-sjlj-r2/lib/gcc/i686-w64-mingw32/4.8.1/include/c++/bits/
 stl_vector.h:557
 557           { return iterator(this->_M_impl._M_finish); }
 (gdb)
 __gnu_cxx::__normal_iterator<std::pair<boost::condition_variable*,
 boost::mutex*
 >*, std::vector<std::pair<boost::condition_variable*, boost::mutex*>,
 std::alloc
 ator<std::pair<boost::condition_variable*, boost::mutex*> > >
 >::__normal_iterat
 or (this=0x22fbec, __i=@0x243360: 0x1)
     at
 c:/x32-481-win32-sjlj-r2/lib/gcc/i686-w64-mingw32/4.8.1/include/c++/bits/
 stl_iterator.h:726
 726           __normal_iterator(const _Iterator& __i) : _M_current(__i) {
 }
 (gdb)
 __gnu_cxx::operator!=<std::pair<boost::condition_variable*,
 boost::mutex*>*, std
 ::vector<std::pair<boost::condition_variable*, boost::mutex*>,
 std::allocator<st
 d::pair<boost::condition_variable*, boost::mutex*> > > > (
     __lhs=<error reading variable: Cannot access memory at address 0x0>,
     __rhs=<error reading variable: Cannot access memory at address 0x1>)
     at
 c:/x32-481-win32-sjlj-r2/lib/gcc/i686-w64-mingw32/4.8.1/include/c++/bits/
 stl_iterator.h:825
 825         { return __lhs.base() != __rhs.base(); }
 (gdb)
 __gnu_cxx::__normal_iterator<std::pair<boost::condition_variable*,
 boost::mutex*
 >*, std::vector<std::pair<boost::condition_variable*, boost::mutex*>,
 std::alloc
 ator<std::pair<boost::condition_variable*, boost::mutex*> > > >::base (
     this=0x22fc5c)
     at
 c:/x32-481-win32-sjlj-r2/lib/gcc/i686-w64-mingw32/4.8.1/include/c++/bits/
 stl_iterator.h:791
 791           { return _M_current; }
 (gdb)
 __gnu_cxx::__normal_iterator<std::pair<boost::condition_variable*,
 boost::mutex*
 >*, std::vector<std::pair<boost::condition_variable*, boost::mutex*>,
 std::alloc
 ator<std::pair<boost::condition_variable*, boost::mutex*> > > >::base (
     this=0x22fc58)
     at
 c:/x32-481-win32-sjlj-r2/lib/gcc/i686-w64-mingw32/4.8.1/include/c++/bits/
 stl_iterator.h:791
 791           { return _M_current; }
 (gdb)
 boost::detail::thread_data_base::~thread_data_base (this=0x243330,
     __in_chrg=<optimized out>) at libs\thread\src\win32\thread.cpp:45
 45                  i->second->unlock();
 (gdb) s
 __gnu_cxx::__normal_iterator<std::pair<boost::condition_variable*,
 boost::mutex*
 >*, std::vector<std::pair<boost::condition_variable*, boost::mutex*>,
 std::alloc
 ator<std::pair<boost::condition_variable*, boost::mutex*> > >
 >::operator->
     (this=0x22fc5c)
     at
 c:/x32-481-win32-sjlj-r2/lib/gcc/i686-w64-mingw32/4.8.1/include/c++/bits/
 stl_iterator.h:743
 743           { return _M_current; }
 (gdb) p _M_current
 $4 = (std::pair<boost::condition_variable*, boost::mutex*> *) 0x0
 (gdb) s

 Program received signal SIGSEGV, Segmentation fault.
 0x67e81517 in boost::detail::thread_data_base::~thread_data_base (
     this=0x243330, __in_chrg=<optimized out>)
     at libs\thread\src\win32\thread.cpp:45
 45                  i->second->unlock();
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7666#comment:19>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.