RFR: JDK-8306507: [linux] Print number of memory mappings in error reports [v2]

[Andrew Dinn]

On Thu, 27 Apr 2023 12:18:30 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> The number of active mappings of a crashed JVM is interesting in case of an OOM, but counting mappings is cumbersome, especially when dealing with very large processes. /proc/pid/maps can have millions of lines.
>> 
>> Let's print out the number of active mappings when hs-err printing.
>
> Thomas Stuefe has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:
> 
>  - Merge branch 'openjdk:master' into JDK-8306507-Print-number-of-memory-mappings-in-error-reports
>  - JDK-8306507-Print-number-of-memory-mappings-in-error-reports

Looks fine to me.

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Marked as reviewed by adinn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13555#pullrequestreview-1432229698