JFR emergency dump would happen when OOM was thrown. However it would not contain most recent `OldObjectSample` events emitted by LeakProfiler.

I reported this issue in past, and it seems to be difficult to fix soon, and also JDK codebase has been updated in several years. It brings us to fix this issue easier than past.

So I propose again to emit the events from LeakProfiler when OOM happened.

[1] https://mail.openjdk.org/pipermail/hotspot-jfr-dev/2019-January/000381.html