hg: jdk/submit: 8252657: JVMTI agent is not unloaded when Agent_OnAttach is failed

[suenaga at oss.nttdata.com]

Changeset: 39c9f7d6c41f
Author:    ysuenaga
Date:      2020-09-01 22:36 +0900
URL:       https://hg.openjdk.java.net/jdk/submit/rev/39c9f7d6c41f

8252657: JVMTI agent is not unloaded when Agent_OnAttach is failed

! src/hotspot/share/prims/jvmtiExport.cpp
! test/hotspot/jtreg/serviceability/dcmd/jvmti/AttachFailed/AttachReturnError.java