Backporting an AsyncGetCallTrace patch to OpenJDK6

[Joseph D. Darcy]

Andrew John Hughes wrote:
> 2008/9/11 Andrew John Hughes <gnu_andrew at member.fsf.org>:
>> 2008/9/11 Daniel D. Daugherty <Daniel.Daugherty at sun.com>:
>>> Andrew John Hughes wrote:
>>>
>>> FWIW, I don't see any change to the HS_ version numbers in our
>>> patch to switch from OpenJDK6 b11's to OpenJDK7 b24's HotSpot.
>>> Given OpenJDK6 was derived from something like b20, I guess this is
>>> not that strange.
>>>
>>> JDK7-B24 has the following values:
>>>
>>>     HS_MAJOR_VER=12
>>>     HS_MINOR_VER=0
>>>     HS_BUILD_NUMBER=01
>>>
>>> Joe stated earlier in this thread that OpenJDK6 is based on
>>> HSX-10 so its values should not be the same. For 1.6.0_07,
>>> I see:
>>>
>>>     HS_MAJOR_VER=10
>>>     HS_MINOR_VER=0
>>>     HS_BUILD_NUMBER=23
>>>
>>> Dan
>>>
>>>
>>>
>> Hmmm...
>> Then either Gary's HotSpot patch doesn't update that file or OpenJDK6
>> is not based on the same as this 1.6.0_07 thing you mention.
>> I'll try and have a closer look later.
>> --
>> Andrew :-)
>>
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> 
> IcedTea6 contains:
> 
> HS_MAJOR_VER=10
> HS_MINOR_VER=0
> HS_BUILD_NUMBER=19
> 
> IcedTea/b33 contains:
> 
> HS_MAJOR_VER=14
> HS_MINOR_VER=0
> HS_BUILD_NUMBER=01
> 
> icedtea-hotspot-6b11-7b24.patch only updates the src code and not
> make/hotspot_version
> so it's actually worryingly building a different version of HotSpot
> from the one it thinks it is.
> It will actually be 12-0-01 as you state, but will report 10-0-19.
> 
> Overall, it would be better to always build against the most recent
> stable HotSpot tree if possible
> rather than the one provided by the build drop.  Do we know what the
> most stable would be?

Generally, the HotSpot in the base OpenJDK 6 should be pretty stable. 
The policy I've implemented,
http://mail.openjdk.java.net/pipermail/jdk6-dev/2008-February/000005.html,
for the HotSpot in OpenJDK 6 is to track fixes in the 6 update releases, 
augmented with some other fixes for license corrections, gcc build 
issues, (and the occasional Eclipse crash).  The HotSpot in the base 
OpenJDK 6 code base is very close to the HotSpot in the currently 
shipping 6 update release.

-Joe