RFR: 8254824: SignalHandlerMark have no purpose [v2]

[David Holmes]

On Fri, 16 Oct 2020 08:13:28 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> SignalHandlerMark increase and decrease _num_nested_signal, but it is never read.
>> We have no caller to is_inside_signal_handler().
>> 
>> Testing T1.
>
> Robbin Ehn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added comments

Looks good.
Thanks.

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/677