[Boost-bugs] [Boost C++ Libraries] #6440: Regex crash in object_cache in many-locale mulithreaded scenarios

Subject: [Boost-bugs] [Boost C++ Libraries] #6440: Regex crash in object_cache in many-locale mulithreaded scenarios
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-01-23 21:16:56

#6440: Regex crash in object_cache in many-locale mulithreaded scenarios
-----------------------------------------------+----------------------------
 Reporter:  Hamid Palo <hamid.palo@…>          |       Owner:  johnmaddock
     Type:  Bugs                               |      Status:  new        
Milestone:  To Be Determined                   |   Component:  regex      
  Version:  Boost 1.48.0                       |    Severity:  Showstopper
 Keywords:                                     |  
-----------------------------------------------+----------------------------
 An intermittent crash occurs in object_cache when using regex in apps with
 many locales in multithreaded apps. The crash occurs due to pos not being
 decrementable in object_cache.hpp line  154 in boost 1.48.0.

 Stack:

 {{{
 msvcr90!_invalid_parameter_noinfo+0xc
 myapp!boost::object_cache<unsigned
 long,boost::re_detail::w32_regex_traits_implementation<wchar_t>
 >::do_get+0x533
 myapp!boost::object_cache<unsigned
 long,boost::re_detail::w32_regex_traits_implementation<wchar_t>
 >::get+0x69
 myapp!boost::re_detail::create_w32_regex_traits<wchar_t>+0x1b
 myapp!boost::re_detail::regex_data<wchar_t,boost::regex_traits<wchar_t,boost::w32_regex_traits<wchar_t>
 >
 >::regex_data<wchar_t,boost::regex_traits<wchar_t,boost::w32_regex_traits<wchar_t>
 > >+0x6c
 myapp!boost::basic_regex<wchar_t,boost::regex_traits<wchar_t,boost::w32_regex_traits<wchar_t>
 > >::do_assign+0x5f
 myapp!boost::basic_regex<wchar_t,boost::regex_traits<wchar_t,boost::w32_regex_traits<wchar_t>
 > >::assign+0x23
 myapp!match+0x131
 }}}


 The attached program reproes this consistently in anywhere from 1 min to
 10 min on my Xeon workstation running Win7 x64 and using msvc version
 16.00.40219.01. I have not tried any other compilers yet.

 The attached code also does not call regex directly but rather it
 manipulates object_cache directly in the same way that w32_regex_traits
 does in order to get an easier repro.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6440>
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