[kaffe] MIPS JIT3 and null pointers.

[Casey Marshall]

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Hi,

I've determined why an invokeinterface on a null object will abort
rather than throw a NullPointerException: in dispatchException
(kaffe/kaffevm/exception.c:303) the full stack trace cannot be built,
for some reason, so the exception handler won't be found.

The SIGSEGV occurs in soft_lookupinterfacemethod, which is called with
a NULL obj parameter, which in turn is called from jitted code. So my
guess is that somehow the MIPS backend can't trace back across this
barrier.

I'm assuming that __mipsGetNextFrame is broken, but would entertain
other ideas. Has anyone dealt with something similar to this on other
architectures?

Cheers,

- -- 
Casey Marshall || rsdio at metastatic.org
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