RFR(XXS): 7147806: G1: Crash in vm bootstrap when running with -XX:+UseG1GC -XX:-UsePerfData
john.cuthbertson at oracle.com
Wed Feb 22 20:10:14 UTC 2012
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.
More information about the hotspot-gc-dev