[jdk11u-dev] RFR: 8243210: ClhsdbScanOops fails with NullPointerException in FileMapHeader.inCopiedVtableSpace

[Thomas Stuefe]

On Fri, 4 Aug 2023 15:09:49 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> We see this exact problem at customers, and the fix is trivial and no-risk, so lets get this fixed.
> 
> Unclean backport.
> 
> Differences:
> 
> - `src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/memory/FileMapInfo.java` had been rewritten for `8263002: Remove CDS MiscCode region` but it does not affect the effectiveness of this patch.
> 
> - `test/hotspot/jtreg/ProblemList.txt`: the original patch re-includes the formerly excluded test `serviceability/sa/ClhsdbScanOops.java` for macos. That exclusion did not exist in 11, so I left the hunk out.
> 
> Tests:
> 
> I manually tested `serviceability/sa/ClhsdbScanOops.java` on Linux x64, seems fine.

GHAs broken for crossbuild platforms; I tested the patch locally with arm32.

Due to the really simple nature of the patch I think the broken GHAs are not relevant.

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PR Comment: https://git.openjdk.org/jdk11u-dev/pull/2066#issuecomment-1667692681