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There's a very small window of vulnerability in _sigbe, which can lead to signal handlers not being executed. In _sigbe, the _cygtls lock is released before incyg is decremented. If setup_handler acquires the lock just after _sigbe releases it, but before incyg is decremented, setup_handler will mistakenly believe that the thread is in Cygwin code, and will set up the interrupt using the tls stack. _sigbe should decrement incyg before releasing the lock. --------- Ernie Coskrey SteelEye Technology, Inc.
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