RFR: Better jdb support for vthreads. Improved jdb vthread testing support. [v3]

[Chris Plummer]

On Tue, 8 Mar 2022 15:29:04 GMT, Alex Menkov <amenkov at openjdk.org> wrote:

>> Chris Plummer has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Minor comment changes.
>
> test/hotspot/jtreg/vmTestbase/nsk/jdb/kill/kill001/kill001.java line 133:
> 
>> 131:         // Continue each of the threads that received the "kill" exception. Not needed
>> 132:         // for the vthread case since they are not actually killed.
>> 133:         if (!vthreadMode) for (int i = 0; i < numThreads; i++) {
> 
> if and for at the same line don't look good

ok

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PR: https://git.openjdk.java.net/loom/pull/97