Review request (XS): JDK-8009282: Assertion "assert(used_and_free == capacity_bytes) failed: Accounting is wrong" failed with -XX:+Verbose -XX:+TraceMetadataChunkAllocation

Jon Masamitsu jon.masamitsu at oracle.com
Mon Mar 11 11:35:32 PDT 2013


Looks good.

Jon

On 03/11/13 06:12, Mikael Gerdin wrote:
> Hi,
>
> Please review this small fix for an incorrect assert that can trigger 
> when we run out of metaspace memory.
>
> Webrev:
> http://cr.openjdk.java.net/~mgerdin/8009282/webrev.0/
>
>
> The reasoning behind this change is that when running with the command 
> line flags specified in the bug report we call MetaspaceAux::print_on 
> when we're about to throw an j.l.OutOfMemoryError. At that point 
> another thread may be successful in allocating metaspace memory in 
> another class loader or smaller memory chunks which are available.
>
> The assert condition must only hold when the VM is at a safe point and 
> no other thread may be allocating metaspace memory.
>
> Thanks
> /Mikael


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