RFR: 8356779: IGV: dump the index of the SafePointNode containing the current JVMS during parsing

[Quan Anh Mai]

On Thu, 4 Sep 2025 05:22:00 GMT, Saranya Natarajan <snatarajan at openjdk.org> wrote:

> This PR prints index of the SafePointNode containing the current JVMS during parsing in IGV. As stated in JBS the reason for this is that there are a lot of nodes during parsing, it would be nice to know what are the current nodes in the local slots or in the stack when looking at a graph.
> 
> IGV screenshot of before fix 
> <img width="314" height="675" alt="Screenshot 2025-09-15 at 11 56 54" src="https://github.com/user-attachments/assets/3489f580-f4a3-4f22-86a6-0d9351f1d143" />
> 
> IGV screenshot of after fix
> <img width="314" height="652" alt="Screenshot 2025-09-15 at 11 54 55" src="https://github.com/user-attachments/assets/239c7d60-7a2a-4608-acd0-036bab3ae048" />

Marked as reviewed by qamai (Committer).

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PR Review: https://git.openjdk.org/jdk/pull/27083#pullrequestreview-3224467839