Recent Truffle DSL changes.

Stefan Marr java at
Thu Sep 18 09:12:58 UTC 2014

Hi Christian:

On 18 Sep 2014, at 00:05, Christian Humer <christian.humer at> wrote:

> Regarding the thread-safety issues. Yes polymorphic rewrites are not yet thread-safe. But they were also not thread-safe in the old version. So you might have been just lucky.
> However it is straight forward to make them thread-safe. You just have to wrap every replace in DSLShare into a closure and call atomic on the node that is currently in the AST.
> I've attached a patch. Let me know if that works for you. So I can push it tomorrow. (Had no time to verify it yet) 

Have only tested it briefly, but there is still an issue with a node that doesn’t have a parent yet.
The Eclipse and the JVM are unfortunately rather uncooperative. Debugging this isn’t exactly easy, because for half of the objects Eclipse refuses to give me any information.
Is this a known issue? I set the debugger to suspend the VM once an illegal state exception is hit. That doesn’t seem to be a good idea.

Will try to look into it later today.


Stefan Marr
INRIA Lille - Nord Europe

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