(libgcc) what does _Unwind_Resume do ?

[Sunzir Deepur]

Hi Andrew,

On 10/20/07, Andrew Haley <aph-gcc@littlepinkcloud.com> wrote:
> Sunzir Deepur writes:
>  > I have noticed that glibc has extensive use of the _Unwind_Resume procedure
>  > Can anyone please explain me what is it ? why is it needed for C programs
>
> It's needed for pthread_cancel.
> 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

Is the winding relevant only to C++ exception catching ?
If so, why would it be needed when compiling simple C apps ?

Thank you (and sorry for posting initialy at gcc@gcc.gnu.org),
Sunzir