Date: Fri, 3 Sep 1999 09:55:25 -0600 From: Nate Williams <nate@mt.sri.com> 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. Message-ID: <199909031555.JAA02569@mt.sri.com> In-Reply-To: <19990904000606R.fuyuhik8@is.titech.ac.jp> References: <19990904000606R.fuyuhik8@is.titech.ac.jp>
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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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