Jeff Sturm wrote:
> For one thing, the gcj runtime doesn't distinguish native (CNI) and java
> code. At the object level, they are the same.
OK. Your point of view is really GCJ specific. My original point was
effectively that CNI is not a "universal" native interface that could
reasonably be expected from every "Classpath" compatible VM.
> ...
> The simplest thing to do (I'm guessing somewhat, nobody has written a
> copying collector for gcj that I'm aware of) is conservatively scan stacks
> and registers, pinning any objects that could possibly be referenced on
> the stack or by a register so they cannot be moved.
So, you're back suggesting to scan "conservatively" and pinning. So,
you agree that CNI is incompatible with precise collectors (at least,
moving ones).
> It's a matter of portability. Libgcj relies on help from the OS for
> threads, incremental GC, etc. so of course these features are not
> universally available.
Exactly my point. CNI is GCJ specific.
I have nothing against CNI, or GCJ. I am just trying to discuss the
"real" goals of Classpath, and maybe put some pressure to resolve this
important yet unresolved CNI/JNI issue.
It is my impression that by now, most people on this list, agree that
this issue should be resolved simply keeping 2 separate native branches,
one for JNI, and one for CNI. Remains to decide if we want to put some
rules on the synchronization of both trees. Right?
Etienne
--
+--------------------------------------------------------------------+
| �tienne M. Gagnon mailto:[EMAIL PROTECTED] |
| Professeur adjoint T�l�phone: (514) 987-3000 poste 8215 |
| Bureau: PK-4930 T�l�copieur: (514) 987-8477 |
| D�partement d'informatique, UQ�M http://www.info.uqam.ca/ |
| Auteur de SableVM http://www.sablevm.org/ |
| et de SableCC http://www.sablecc.org/ |
+--------------------------------------------------------------------+
| Etienne M. Gagnon mailto:[EMAIL PROTECTED] |
| Assistant Professor Phone: (514) 987-3000 ext. 8215 |
| Office: PK-4930 Fax: (514) 987-8477 |
| Department of Computer Science, UQAM http://www.info.uqam.ca/ |
| Author of SableVM http://www.sablevm.org/ |
| and SableCC http://www.sablecc.org/ |
+--------------------------------------------------------------------+
_______________________________________________
Classpath mailing list
[EMAIL PROTECTED]
http://mail.gnu.org/mailman/listinfo/classpath
