RFR: 8259486: Replace PreserveExceptionMark with implementation for CautiouslyPreserveExceptionMark [v3]

[Coleen Phillimore]

On Tue, 12 Jan 2021 02:43:26 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix wrong JavaThread::active in fill_in_stack_trace.
>
> The fix looks good to me.
> Thanks,
> Serguei

Thanks Serguei!

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PR: https://git.openjdk.java.net/jdk/pull/2007