hg: jdk/jdk15: 8247530: JfrCheckpointManager failed "assert(!SafepointSynchronize::is_at_safepoint()) failed: invariant"

[markus.gronlund at oracle.com]

Changeset: 624948a92351
Author:    mgronlun
Date:      2020-06-15 21:52 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk15/rev/624948a92351

8247530: JfrCheckpointManager failed "assert(!SafepointSynchronize::is_at_safepoint()) failed: invariant"
Reviewed-by: egahlin

! src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointManager.cpp