[Boost-bugs] [Boost C++ Libraries] #5837: tss_dll: does not appear to allocate TLS storage at the proper time

Subject: [Boost-bugs] [Boost C++ Libraries] #5837: tss_dll: does not appear to allocate TLS storage at the proper time
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-08-30 06:10:09

#5837: tss_dll: does not appear to allocate TLS storage at the proper time
--------------------------------+-------------------------------------------
 Reporter:  noloader@…          |       Owner:         
     Type:  Bugs                |      Status:  new    
Milestone:  To Be Determined    |   Component:  None   
  Version:  Boost 1.47.0        |    Severity:  Problem
 Keywords:                      |  
--------------------------------+-------------------------------------------
 When a Windows process loads a DLL, DllMain will recieve
 DLL_PROCESS_ATTACH. According to MSDN process can use the opportunity to
 allocate thread storage [1]. Interestingly, on_process_enter() (and
 on_thread_enter()) does not perform the initialization. Note that
 on_process_enter() is the Boost routine for DLL_PROCESS_ATTACH; and
 on_thread_enter() is called for DLL_THREAD_ATTACH.

 From tss_hooks.cpp:

 {{{
 extern "C" BOOST_THREAD_DECL void on_process_enter()
 {
 }
 }}}

 and

 {{{
 extern "C" BOOST_THREAD_DECL void on_thread_enter()
 {
 }
 }}}

 Even more bizarre, on_thread_exit() appears to allocate the thread local
 storage:

 {{{
 extern "C" BOOST_THREAD_DECL void on_thread_exit()
 {
     // Initializing tls_key here ensures its proper visibility
     boost::call_once( init_tls_key, once_init_tls_key );

     // Get the exit handlers list for the current thread from tls.
     if( tls_key == invalid_tls_key )
     {
         return;
     }
     ...
 }}}

 Perhaps it would be a good idea to review the MSDN documentation, and
 perfom TLS initialization according to Microsoft recommendations.

 [1] http://msdn.microsoft.com/en-us/library/ms682583(v=vs.85).aspx

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5837>
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