RFR: 8259067: bootclasspath append takes out object lock [v2]

[Coleen Phillimore]

On Tue, 5 Jan 2021 02:03:42 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Simplify with a Mutex.
>
> Hi Coleen,
> 
> LGTM++
> 
> Thanks,
> Serguei

Thanks Serguei.  Ioi convinced me offline to simplify and just use a mutex, so I updated the patch to do that.  I tested with jdi and jvmti tests and will rerun tier1-3.

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PR: https://git.openjdk.java.net/jdk/pull/1935