RFR: 8268857: Merge three vm operations in thread_dump [v3]

[Denghui Dong]

On Thu, 17 Jun 2021 23:12:04 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Sorry still not a fan even with the hacked in deadline support for find_deadlocks. It is too arbitrary - you have no idea what constitutes a reasonable deadline, nor by how much you may overshoot that deadline.
> 
> David

Hi David,

Thanks for the comment.

Yes, there is no good way to determine a suitable deadline.

I intend to temporarily give up the idea of combining VM_FindDeadlocks into VM_ExtendedPrintThreads.

But I think we can at least merge `VM_PrintJNI` and `VM_PrintThreads`, because the implementation of `VM_PrintJNI` is very fast. What do you think?

Denghui

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PR: https://git.openjdk.java.net/jdk/pull/4504