RFR(XXS): 7147806: G1: Crash in vm bootstrap when running with -XX:+UseG1GC -XX:-UsePerfData

Bengt Rutisson bengt.rutisson at oracle.com
Wed Feb 22 23:31:07 PST 2012


Looks good.

What is the integration plan for this? The bug is a P4. Will you try to 
get it into hs23 or is it enough that this makes it into hs24?

Bengt

On 2012-02-22 21:10, John Cuthbertson wrote:
> Hi Everyone,
>
> Can I have a couple of volunteers to review the changes for this CR? 
> The webrev can be found at: 
> http://cr.openjdk.java.net/~johnc/7147806/webrev.0/
>
> The issues here was that some updates to the G1 performance counter 
> variables were not guarded. In the other collectors, the generation 
> and collector performance counters are allocated/initialized 
> unconditionally. The performance counter variables that these counters 
> contain, however, are allocated and updated only if UsePerfData is 
> enabled. In G1, some of these updates were not suitably guarded and so 
> we tried to update some unallocated performance counter variables.
>
> Testing:
> * Small test case (gcbasher) with the offending command line flag 
> combination and with just G1.
>
> Thanks,
>
> JohnC



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