Java on uClinux

[Andrew Haley]

Bernd Schmidt writes:
 > Andrew Haley wrote:
 > > Bernd Schmidt writes:
 > >  > David Daney wrote:
 > >  > > Perhaps not in general, but one unstated premise of this whole thread is 
 > >  > > that for some GCC targets (most Unix like operating systems) you *can* 
 > >  > > count on a SIGSEGV when you dereference a null pointer.  The java front 
 > >  > > end takes advantage of this fact to eliminate explicit checks for 
 > >  > > dereferencing of null pointers.
 > >  > 
 > >  > Oh.
 > >  > 
 > >  > Speaking of which, has anyone ported gcj to a MMU-less uClinux platform yet?
 > > 
 > > It's impossible with the current config.  This is because some of
 > > libgcj is written on C++, and the C++ compiler FE does not insert
 > > checks for null pointer accesses.  I wrote a small patch to do this
 > > but it was rejected.
 > 
 > Hmm, we can trap null pointer accesses, but I don't think we deliver 
 > reliable SIGSEGV signals yet or provide a means of getting the faulting 
 > address.  If that was fixed, is there anything obvious that stands in 
 > the way of a uClinux/uClibc port?

I don't think so.  The only other dependency we have is POSIX threads.

Andrew.