[boost] [bug report]boost-sandbox.interprocess::mapped_region.hpp

From: Wilbur Lang (wilburlang_at_[hidden])
Date: 2007-07-13 03:58:37

Hi,

Because of network problem, what I had is a snapshot
of CVS-HEAD-07-06-29-0909. If this bug is corrected/reported before,
please ignore.

in the file /boost/interprocess/mapped_region.hpp line 467, followed is
a snip
==============================================
   //Check for fixed mapping error
   if(address && (m_base != (void*)address)){
      error_info err = system_error_code();
      this->priv_close();        // bug here
      throw interprocess_exception(err);
   }
==============================================

because adjusting mapping address to page size granularity, which may
cause m_extra_offset != 0. in mapped_region::priv_close::munmap will
restore address with m_base and m_extra_offset. But at line 467, m_base
did not be adjusted (it's adjusted at line 472), when priv_close()
invoked, we got a wrong address to munmap.

I think it affect windows version too (same file at line 309).

one possible correction:
move line 472~474 to 463 (*nix version).
move line 314 to 305 (windows version).

Best Regards,

Wilbur Lang