Patch for silent crash with Cygwin1.dll v 1.5.19-4

Gary Zablackis gzabl@yahoo.com
Mon Mar 6 14:14:00 GMT 2006


--- Christopher Faylor
<cgf-no-personal-reply-please@cygwin.com> wrote:

> You have missed how efault.faulted() is supposed to
> be operating and,
> AFAICT, *does* operate throughout the Cygwin DLL. 
> It really is supposed
> to be catching NULL dereferences.
> 
> It's possible of course, that there is something
> wrong with efault.faulted()
> but that doesn't mean we need to extra code around
> efault.faulted.  It means
> that efault.faulted needs to be fixed.
> 
> i.e., we need to fix the problem not the symptom.
> 
> cgf
> 
I did some more research over the weekend and my
problem seems to only come when loading a dll via
dlopen() and run_ctors() is called from dll:init() and
pthread_key_create() is called during the time that
run_ctors() is active. I still have not found who is
calling pthread_key_create(), but will be working on
this as time permits this week.

It's been several years since I did any assembly
language coding, so I have to study what's going on
when efault.faulted() returns non-zero - and figure
out how to get gdb to step through the assembly code.

Thanks,
Gary

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