Re: Patch: Exception Handling in libobjc2 with latest clang builds

[David Chisnall]

You forgot to include the patch...

If you want C++ exceptions to work, then you should have a look at:

https://github.com/pathscale/libcxxrt/blob/master/src/exception.cc

I wrote this for C++ exceptions at about the same time as I wrote the 
Objective-C ones, and it probably has the same bugs.  It would be great to have 
them both working.

Logan: Are you or any of the other MediaTek people going to make it to 
AsiaBSDCon this week?

David

On 10 Mar 2014, at 19:25, Mathias Bauer <mathias_bauer@gmx.net> wrote:

> Hi dear list,
> 
> as already reported here, the exception handling in libobjc2 does not work 
> correctly on ARM platforms. The personality routine misses the virtual stack 
> unwinding required by the ARM EHABI spec.
> 
> I asked Logan Chien, who was involved in getting the ARM EHABHI stuff into 
> llvm, for help and he sent me a patch that solved the problem.
> 
> The patch makes the ExceptionTest.m work on the ARM systems he and I tested 
> it on. The test cases for C++ and foreign exceptions still don't work, buth 
> there are other reasons for that (e.g. that the code that there is no code 
> that handles C++ exceptions on ARM).
> 
> So first of all: many thanks to Logan!
> 
> He asked me to post the patch here, so that's what I do now. Please give it a 
> review.
> 
> 
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