RFR: 8029329: tmtools tests fail with NPE (in the tool) when run with G1 and FlightRecorder

Stefan Johansson stefan.johansson at oracle.com
Mon Dec 2 06:54:55 PST 2013

Hi again,

After discussions with Bengt I realized that the limit I actually want 
to use is the currently committed number of regions. Here is an updated 


On 2013-11-29 14:26, Stefan Johansson wrote:
> Hi,
> Please review this fix for:
> https://bugs.openjdk.java.net/browse/JDK-8029329
> Webrev:
> http://cr.openjdk.java.net/~sjohanss/8029329/webrev.00/
> Summary:
> The iterator used by the SA for walking through G1s heap regions used 
> the total number of regions as the limit for hasNext. This caused a 
> NullPointerException when reaching the first unallocated region. 
> Updated the SA to initialize the iterator with the currently allocated 
> number of regions as limit instead.
> Testing:
> * Tested builds through JPRT
> * Ran vm.tmtools.testlist throught Aurora and observed no failures on 
> the test I expected to pass.
> Thanks,
> Stefan

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