On Tue, 24 Jun 2025 23:53:23 GMT, Alex Menkov <amen...@openjdk.org> wrote:

> I thought if we need some sanity test for ThreadStart event with 
> can_generate_early_vmstart capability, but looking at the spec I see no 
> relations between them. So it's unclear what was the purpose of the test.

The test purpose was to ensure the `ThreadStart` are posted in the early 
`VM_START` phase. The issue is that a few system threads are triggered to start 
in the early `VM_START` but there is no guaranty they are really started in 
that phase because of a race with the VM initializing thread.

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PR Comment: https://git.openjdk.org/jdk/pull/25948#issuecomment-3002273203

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