Question on status of a few bugs in OpenJDK 6

[Andrew Hughes]

----- Original Message -----
> Hi, Kris
> 
> As I know, only 2 bugs from these affect JDK6.
> First is 5091921 but the fix is too big to backport it to jdk6 and it
> also rely on new code in HS21 VM which is only
> present in JDK7 (we stop delivering new VM into jdk6 updates after
> HS20 VM).
> Second bug 7044738 was backported into product jdk6u28. I don't know
> if OpenJDK6 community took it.
> 

It's not in OpenJDK6.  I would guess this is probably the first most people
outside Oracle have heard of it.  Is there an easy way of finding out which
fixes are being backported to 6 as we obviously have no access to the proprietary
jdk6 trees?

> The rest is bug tail of 5091921 and related changes so they do not
> affect jdk6.
> 
> Regards,
> Vladimir
> 
> On 3/8/12 3:37 AM, Krystal Mok wrote:
> > Hi all,
> >
> > Guess I'm asking on the wrong list, but I don't know which list I
> > should be sending this to for OpenJDK 6-only  issues.
> > The jdk6-dev list is mostly silent now, doesn't seem to be the
> > right place, neither.
> > Maybe I should be asking the sustaining team?
> >
> > I was looking at what changes went into recent OpenJDK 6 releases.
> > Turns out OpenJDK 6 build 23 is the closest version
> > to JDK 6 update 25, and OpenJDK 6b24 is the closest version to
> > 6u30. Reading through the release changes [1][2], though,
> > tells that:
> > 1. The loop optimization bug that crashes the VM is fixed:
> >    7070134: Hotspot crashes with sigsegv from PorterStemmer
> > 2. A few other related bugs aren't included in OpenJDK 6 yet, as of
> > now:
> >    5091921: Sign flip issues in loop optimizer
> >    7052494: Eclipse test fails on JDK 7 b142
> >    7004535: Clone loop predicate during loop unswitch
> >    7068051: SIGSEGV in PhaseIdealLoop::build_loop_late_post on
> >    T5440
> >    7044738: Loop unroll optimization causes incorrect result
> >    7077439: Possible reference through NULL in loopPrdicate.cpp:726
> >
> > I suppose some of these fixes are actually in the product JDK 6u29+
> > already, like 7044738.
> >
> > So, questions:
> > * Could anyone help identify whether these bugs affect OpenJDK 6 or
> > not?
> > * If they do, what are the plans for porting the fixes back to
> > OpenJDK 6?
> > * And what is the general plan for future maintence of OpenJDK 6?
> > * Is there any place in the public that we can track what's going
> > to be backported into OpenJDK 6?
> > * Will it sort of EOL along with the product JDK 6?
> >
> > Thanks,
> > Kris Mok
> >
> > [1]:
> > https://blogs.oracle.com/kto/resource/OpenJDK6-B23-Changes.html
> > [2]:
> > https://blogs.oracle.com/openjdk6releases/resource/OpenJDK6-B24-Changes.html
> >
> 

-- 
Andrew :)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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