Re: [Boost-users] Regex crash

From: Alan Gray (alan_l_gray_at_[hidden])
Date: 2006-08-10 06:27:47

Hi John,

Will give that a go. I also downloaded a prebuild from CERN and will give 
that a rip also. Our feelings also suggested wrong calling convention, or 
some clash of binary compatability problem. We kind of thought the test 
program would suffer the same fate. We have exactly the same compiler / 
linker flags. :-(

The really strange thing is that we are trying all of this with VS2005, but 
the same code has the same problem in VC6 and a much earlier version of 
boost, but only in unicode. Config.hpp shows

* Copyright (c) 1998-2000

and cregexw.hpp shows

  *   LOCATION:    see http://www.boost.org for most recent version.
  *   FILE         cregex.cpp
  *   VERSION      3.12
  *   DESCRIPTION: Declares POSIX API functions
  *                + boost::RegEx high level wrapper.

Thanks in advance,
Alan

>From: "John Maddock" <john_at_[hidden]>
>Reply-To: boost-users_at_[hidden]
>To: <boost-users_at_[hidden]>
>Subject: Re: [Boost-users] Regex crash
>Date: Thu, 10 Aug 2006 09:56:00 +0100
>
>Alan Gray wrote:
> > Hi John,
> >
> > I cannot reproduce the problem in a sample program (yet). The
> > symptions appear to be stack corruption. In the function
> >
> > template <class charT>
> > 
>w32_regex_traits_char_layer<charT>::w32_regex_traits_char_layer(::boost::re_detail::lcid_type
> > l)
> >   : w32_regex_traits_base<charT>(l)
> > {
> >
> > line 187: w32_regex_traits.hpp
> >
> > the line
> >
> >   std::string cat_name(w32_regex_traits<charT>::get_catalog_name());
> >
> > executes ok, looking at the debugger, _Mysize = 0 , _Myres = 15 which
> > is expected. Then stepping into
> >
> >   if(cat_name.size())
> >
> > inside the call, _mysize is now equal to some crazy number. The
> > interesting point is that the debugger steps to the line
>
>The only thing that springs to mind is a binary compartibitity issue: 
>either
>linking to the wrong regex lib build, multiple std lib's linked to your 
>app,
>or some obscure compiler option that's rendered the prebuilt lib's
>incompatible with your app.  As a quick test try adding the regex source
>directly to your project and building with BOOST_REGEX_NO_LIB defined.
>(Note this will make your app a lot "fatter" than it needs to be, but it's 
>a
>useful sanity check).
>
>HTH, John.
>
>_______________________________________________
>Boost-users mailing list
>Boost-users_at_[hidden]
>http://lists.boost.org/mailman/listinfo.cgi/boost-users