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From: Nate Williams <nate@mt.sri.com>
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To: Maruyama Fuyuhiko <fuyuhik8@is.titech.ac.jp>
Cc: java-port@FreeBSD.ORG, freebsd-java@FreeBSD.ORG
Subject: Re: Some bugs exist in JDK for FreeBSD.
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> *First
> 
> When you try division of two special int values, x86 cpu causes
> SIGFPE.  You can easily see it.  Try this "Test.java" compile with
> FreeBSD's javac.
> 
> public class Test {
>     public static void main(String[] args) {
> 	System.out.println("0x80000000 / -1 = " + (0x80000000/-1));
>     }
> }
> 
> I think only this combination (i.e. 0x80000000/-1) causes unexcepted
> SIGFPE, so JavaVM may easily handle it.  Our JIT compiler can handle
> it in support functions for JIT compiled methods, but I think JavaVM
> should handle it by itself!
> 
> This bug may exist all version of JDK for FreeBSD (may be in Linux
> version), but I have checked only these versions.
> 
> jdk1.1.8_AOUT.V99-7-19.tar.gz
> jdk1.1.8_ELF.V99-7-19.tar.gz

Thanks for pointing this out, we'll look into this!

> *Second
> 
> Radio buttons of first window of SPECjvm98 don't appear!
> 
> We always use SPECjvm98 to measure the performance of our JIT.
> SPECjvm98 uses AWT, and it causes visual problem only in *ELF version*
> of jdk1.1.8 for FreeBSD, I beleave AOUT version works correctly.  So,
> I cannot measure our JIT with ELF version in SPEC-confirmed style.
> Sorry, I have not figured out the precise condition, and I don't have
> enough time to do it.

I believe I know the fix for this bug.  The ELF/Motif I am using is not
quite 'up to speed' with the ELF version of XFree86, so I need a newer
version of Motif for FreeBSD.  It was supposed to be shipped last month,
but it hasn't gotten here yet.  I'll go pick my supplier and see what's
what!


Nate


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