[DGD] error context frames versus stack frames

[Carter Cheng]

Is this basically used to locate the correct exception frame on the stack
corresponding to the function activation? In something like C++ one has to
unwind until one reaches a handler if it exists. I suspect in dgd's version
of lpc one has two unwind until one gets to the "function activation" that
originates the catch/rlimit blocks the resume execution after the
catch/rlimit

On Fri, Apr 14, 2017 at 1:19 AM, Felix A. Croes <felix at dworkin.nl> wrote:

> Carter Cheng <cartercheng at gmail.com> wrote:
>
> > I am curious what error context frames in dgd are for vs. stack frames
> in a
> > normal compiler. I am somewhat curious about this error handling code
> since
> > it is probably important to how I map this into llvm's exception
> framework.
> > What does an error context represent and what does ec_pop and ec_push
> > effectively do?
>
> These are exception handling contexts.  They are completely distinct
> from stack frames.  LLVM must use them too, one way or another.  The
> push & pop functions create and destroy exception handling contexts
> on the exception handling stack.
>
> Regards,
> Felix Croes
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