[LLVMdev] x86 unwind support[MESSAGE NOT SCANNED]

[Kenneth Uildriks]

Sweet!  That is exactly what I've been looking for.  I guess it's
going in the 2.6 release then?

And __cxa_throw will still throw a DWARF exception with the landing
pads and the exception object selection and all that jazz?

On Mon, Jul 20, 2009 at 12:12 PM, Duncan Sands<baldrick at free.fr> wrote:
> Hi Kenneth,
>
>> Is there anything in the current codebase that maps an "unwind"
>> instruction to a DWARF unnwinder?  Seeing as how (I think) the DWARF
>> info is already compiled in, this would be a useful thing.
>
> in llvm from svn an "unwind" instruction is mapped to a call to
> _Unwind_Resume.  This is no good for throwing a new dwarf exception,
> but it does mean that you can now implement cleanups as:
>
>   invoke XYZ to label %normal unwind label %cleanup
> cleanup:
>   do_stuff
>   unwind
>
> Ciao,
>
> Duncan.
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