RFR: 8359472: JVM crashes when attaching a dynamic agent before JVMTI_PHASE_LIVE

[Francesco Andreuzzi]

On Mon, 13 Oct 2025 11:52:06 GMT, Kerem Kat <krk at openjdk.org> wrote:

>> In this PR I add a check to prevent debug builds to crash when an agent tries to attach while the JVM is not in live phase.
>> 
>> Passes tier1 and tier2 (fastdebug).
>
> src/hotspot/share/prims/jvmtiAgentList.cpp line 201:
> 
>> 199:   if (JvmtiEnvBase::get_phase() != JVMTI_PHASE_LIVE) {
>> 200:     st->print_cr("Not in live phase");
>> 201:     return;
> 
> Will the agent be loaded later?

No, but the client can retry later.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27766#discussion_r2426122346