RFR(XXS): 7147806: G1: Crash in vm bootstrap when running with -XX:+UseG1GC -XX:-UsePerfData
igor.veresov at oracle.com
Wed Feb 22 16:38:30 PST 2012
On Wednesday, February 22, 2012 at 12:10 PM, 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.
> * Small test case (gcbasher) with the offending command line flag
> combination and with just G1.
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