Something about Apache 2 is causing its controlling cygrunsrv service
process to deadlock within the Cygwin DLL when it attempts to exit.
Attaching with strace to the hung process shows "_cygtls::remove: wait 0x0".
Signals sent to the hung process are not delivered (as shown by strace), but
a kill -9 will succeed.
Attaching with gdb does show anything that looks promising.
Does anyone have any suggestions that could save me some time, compared to an in-depth study of the Cygwin DLL code in this area?
Ummmmm. Oh. Dear.
Since gdb backtrace wasn't helpful, I decided to try single stepping in gdb onwards from the last strace output.
I found out that _cygtls.remove is being called successfully from dll_entry(DLL_THREAD_DETACH), which returns, and the hang finally occurs inside ZwTerminateThread() !!!
What now? Do I scream and give up?
Max.
-- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
