[LLVMdev] x86 unwind support[MESSAGE NOT SCANNED]

Duncan Sands baldrick at free.fr
Tue Jul 21 05:01:32 PDT 2009

Hi Andrew,

> pthread_cleanup_pop() is nothing special, it's just an example of a
> cleanup handler.  Cleanups are very similar to exception handlers, but
> with one small difference: they do some work and then call
> _Unwind_Resume() which continues unwinding.  The unwinder itself
> doesn't know anything about pthread cleanups, it just executes
> whatever is at the landing pad.

cleanups are turned into invoke + (cleanup code) + _Unwind_Resume by



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