RFR(XS): 8213898: CDS dumping of springboot asserts in G1ArchiveAllocator::alloc_new_region

[Jiangli Zhou]

Thanks again, Thomas!

Jiangli


On 11/15/18 10:11 AM, Thomas Schatzl wrote:
> Hi,
>
> On Thu, 2018-11-15 at 10:05 -0800, Jiangli Zhou wrote:
>> Please review the following small fix for the
>> assert(is_available(index)) failure when dumping the classes for
>> springboot (thanks Eric Caspole for reporting the issue!).
>>
>>     webrev: http://cr.openjdk.java.net/~jiangli/8213898/webrev.00/
>>
>>     bug: https://bugs.openjdk.java.net/browse/JDK-8213898
>>
>> HeapRegionManager::find_highest_free is used by
>> G1ArchiveAllocator::alloc_new_region at CDS dump time for allocating
>> a highest free GC region when archiving selected java heap objects.
>> We need to check if the region obtained from the
>> HeapRegionManager::_regions is available, as it might be uncommitted
>> during heap shrinking. The fix has been reviewed by Thomas Schatzl
>> in the bug report. Thanks Thomas!.
>   looks good.
>
> Thomas
>
>