git: openjdk/jdk21u: master: 8314679: SA fails to properly attach to JVM after having just detached from a different JVM

[Chris Plummer]

Changeset: bb1adb1d
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2023-08-30 18:50:25 +0000
URL:       https://git.openjdk.org/jdk21u/commit/bb1adb1d3d6d0dc8d95b65c7ce09aaa8ac34a342

8314679: SA fails to properly attach to JVM after having just detached from a different JVM

Backport-of: 38a9edfb7ee2d91ff52074137c5b69e27bcdbdc3

! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/memory/FileMapInfo.java
! test/hotspot/jtreg/ProblemList-generational-zgc.txt
+ test/hotspot/jtreg/serviceability/sa/ClhsdbAttachDifferentJVMs.java