[LLVMdev] [cfe-dev] GCC 4.7.2 will have Win64 SEH (by default)

[Charles Davis]

+LLVMdev

On Aug 4, 2012, at 9:45 AM, João Matos wrote:

> Charles Davis did a lot of work on Win64 SEH support in LLVM, check commits r131652-r132880.
> 
> As I haven't tested it yet, what exactly is broken?
It's not finished yet. All the stuff for assembly code that uses Win64 EH is done, but not the code-gen-side stuff (cf. Win64Exception class in CodeGen). I was about to finish it, but then real life happened :). This would have allowed us to use DW2-style EH on Win64, but it still would have been problematic for VC++ EH.

Kai Tietz was interested in finishing it, so I emailed him what I have. I assume he's been working on it--he recently submitted a patch to fix the permissions on .pdata/.xdata sections that I got wrong :). I've CC'd him as well so we can see what he has for us.

Chip

> 
> On Sat, Aug 4, 2012 at 2:46 PM, Ruben Van Boxem <vanboxem.ruben at gmail.com> wrote:
> I would like to inquire as to possibility of this being implemented in Clang/LLVM. As this type of exception handling is much closer to the classic Dwarf model currently used, I hope it won't be too difficult to implement this in Clang? Remember that Win64 EH is broken right now, so any improvement is the right improvement ;-)
> 
> -- 
> João Matos
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