GCJ/minGW produced executables and linux/wine

Wed Mar 5 13:47:00 GMT 2003

On Wed, 5 Mar 2003, Andrew Haley wrote:
> That's true only of targets to which gcj has not yet been ported. A
> gcj port absolutely requires a working SEGV handler.

And a working MD_FALLBACK_FRAME_STATE_FOR. Has anyone succeeded yet
implementing this macro for a non-Linux target?
> -fcheck-references is a half-baked workaround.

-fcheck-references isn't that terrible really. It adds a little to code
size but has a negligible effect on runtime, since the branch outcome is
easy to predict.
It also may avoid certain pessimizations resulting from
-fnon-call-exceptions.
-fcheck-references has no effect on native code, but that's probably
fixable. (I wonder what other VM's do? Rely on signal handling or
explicitly test each pointer?)
> -fcheck-references is the configuration default unless we're using
> sjlj. sjlj is deprecated in gcc and will not be supported for ever.

You are correct. Sjlj is indeed the odd case.
> > > Please let me know which tests still fail.
>> Throw_2 passes?
>> Wow, that's *really* weird. It's supposed to detect the case when
> there is not a working SEGV handler, even with -fcheck-references.
>> That is bad news. I would love to know _how_ that test passes.

No idea. On a hunch, I'm starting a build with no-gc.
Jeff