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Date: Sun, 21 Aug 2011 13:05:32 -0400
From: Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.7.9: static const std::string initialization lost in child process when using fork, dlopen
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On Sun, Aug 21, 2011 at 01:48:21PM +0200, whans AT web DOT de wrote:
>./test.exe prints only 'parent:Test' - parent works as expected - and gives a
>test.exe.stackdump - after 30 seconds.
>  
>  
>an example gdb session looks like:
>attach <child pid>
>b load
>c                (needs up to 30 seconds for return)
>n
>n
>n
>s                (step into dll's cTest::get method)
>p t             (print cTest::t, _M_p seems to be corrupt)
>$1 = {static npos = <optimized out>,
>   _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<
>No data fields>}, <No data fields>}, _M_p = 0x0}}
>n
>Program received signal SIGSEGV, Segmentation fault.
>0x6c4b95be in cygstdc++-6!_ZNSsC1ERKSs () from /usr/bin/cygstdc++-6.dll
>  
>  Any idea to fix or circumvent this error 

I don't get a coredump.  What I do get, after a 30 second wait, is:

child:Test

Maybe a snapshot will work better for you:  http://cygwin.com/snapshots/

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