fhandler pointers to cygwin shared memory during fork

["Michael Clarke" <mclarke at timetra dot com>]

Hi folks,

I've been writing a Cygwin application that uses a DLL that maps memory
at the same virtual address as the default cygwin_shared address
(0x0A000000). My DLL maps the memory before Cygwin's dll_entry point is
called. I notice that open_shared correctly maps Cygwin's shared memory
area at a different virtual address to the default. However, tty file
handlers take a pointer (tc in class fhandler_termios) to the tty list
held in this shared memory area. During a fork, this pointer is copied
and never fixed up to account for differing cygwin_shared addresses
between parent and child. My question is, is it a goal of Cywgin to
avoid copying pointers to the shared memory areas during a fork?

Thanks,

Michael.



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