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Re: (libgcc) what does _Unwind_Resume do ?
- From: Andrew Haley <aph-gcc at littlepinkcloud dot COM>
- To: "Sunzir Deepur" <sunzird at gmail dot com>
- Cc: gcc-help at gcc dot gnu dot org
- Date: Sat, 20 Oct 2007 18:56:26 +0100
- Subject: Re: (libgcc) what does _Unwind_Resume do ?
- References: <b758af9e0710200929h41cc842fla0a9401d6217aabc@mail.gmail.com>
This isn't approriate for gcc@gcc.gnu.org, which is about gcc
development. I'm replying to gcc-help.
Sunzir Deepur writes:
> I have noticed that glibc has extensive use of the _Unwind_Resume procedure
> (from libgcc_eh.a) but I have failed to understand it (no luck with
> the onlinedocs:
> http://gcc.gnu.org/onlinedocs/gccint/Exception-handling-routines.html#Exception-handling-routines).
>
> Can anyone please explain me what is it ? why is it needed for C programs
It's needed for pthread_cancel.
> (I understand it is related to exception handling ?) ?
It resumes unwinding after a cleanup.
http://www.codesourcery.com/cxx-abi/abi-eh.html
http://www.mit.edu/~sipb-iap/2004/inside-c/day3/exceptions.html
Andrew.