Small example of livelock regression in garbage collector for GCJ 3.3 under Win32
Tue May 20 16:15:00 GMT 2003
Øyvind Harboe writes:
> Finally I got to the bottom of this. I've managed to
> put together a small example that reproduces the
> problems I've been seeing. Hopefully this testcase
> is useful under Linux as well.
> Short version: GCJ 3.3 will eventually livelock if an
> exception is caused in a finalize method.
> Compile the program below. It will livelock under 3.3,
> with 3.2 it does not livelock.
I can not reproduce this with i686-linux-gnu. How long does it take?
What _exactly_ are the symptoms of this "livelock"?
There was a deadlock between exception handling and the garbage
collector, but Hans fixed that; AFAICR the fix went into gcc 3.3.
> Foobar xxx;
> class Foobar
> public void urk()
> protected void finalize() throws Throwable
> /* cause an exception */
I take it that this is a null pointer exception. Presumably throwing
any exception here would do the same thing. Did you tyr?
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