Backporting an AsyncGetCallTrace patch to OpenJDK6

Joe Darcy Joe.Darcy at Sun.COM
Mon Sep 8 14:55:46 PDT 2008

Daniel D. Daugherty wrote:
> Can someone remind me which HSX version OpenJDK6-B11 is based on?

Currently in OpenJDK 6 we are on HS10, but we plan to upgrade to HS11 in 
the near future.


> Compiler team, Steve G. had talked about back porting this fix
> to earlier HSX releases (prior to HSX-13), but I don't believe
> that he got to that task or handed off to anyone else on the
> Compiler team prior to the unfortunate event at the end of June.
> I reviewed Steve's original changes from an AsyncGetCallTrace()
> point-of-view and I can review these change from the same POV,
> but one or more folks on the compiler team is going to have to
> look at these changes from the Compiler team POV...
> Dan
> Hiroshi Yamauchi wrote:
>> Hi,
>> I backported the change
>> into OpenJDK6 b11 (the patch attached) to avoid JVM crashes in the
>> AsyncGetCallTrace(). The change appears to have been first introduced
>> in OpenJDK7 b27 (Hotspot v13-b01).
>> It'd be great if this patch can be reviewed and applied to future 
>> OpenJDK6
>> builds.
>> I understand that this may be a 'scary' patch considering the stable
>> nature of OpenJDK6. I'd appreciate it if the Hotspot folks can review 
>> and
>> comment on this patch.
>> Thanks,
>> Hiroshi

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