Question on status of a few bugs in OpenJDK 6

Vladimir Kozlov vladimir.kozlov at
Thu Mar 8 10:04:09 PST 2012

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.

The rest is bug tail of 5091921 and related changes so they do not affect jdk6.


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]:
> [2]:

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