[LLVMdev] SJLJ EH
zhangzhengjian at gmail.com
Tue May 5 18:16:02 PDT 2009
>There's definitely more to it than the current intrinsics, which are
>there to support dwarf.
that's to say we need modify the llvm-gcc so the front end can
generate the sjlj-style IR,
>SJLJ exceptions rely on runtime library
>functions to register and unregister call frames which require
>unwinding, so we need to modify LLVM to handle generating those call
my approach : when the user use the option, e.g -enable-sjlj-eh, I
will build the register and unregister, and
other handle sjlj-eh calls, at my target side. yeah, that's a ugly
method, because I didn't touch the llvm-gcc
>Most of the landing pad organization should transfer over with only a
>bit of tweaking. The type checking and catch selection needs to be
>compatible with what's passed from GCC generated code, so there's a
>bit of work to do there as well.
because of my above ugly approach! now that's very difficult for me
to generate the right exception table!
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