> Analysts and supporters often use /proc/xx/maps to make sense of the memory 
> footprint of a process.
> 
> Interpreting the memory map correctly can help when used as a complement to 
> other tools (e.g. NMT). There even exist tools out there that attempt to 
> annotate the process memory map with JVM information.
> 
> That, however, can be more accurately done from within the JVM, at least for 
> mappings originating from hotspot. After all, we can correlate the mapping 
> information in NMT with the VMA map.
> 
> Example output (from a spring petstore run):
> 
> [example_system_map.txt](https://github.com/openjdk/jdk/files/13179054/example_system_map.txt)
> 
> This patch adds the VM annotations for VMAs that are *mmaped*. I also have an 
> experimental patch that works with malloc'ed memory, but it is not ready yet 
> for consumption and I leave that part of for now.

Thomas Stuefe has updated the pull request incrementally with one additional 
commit since the last revision:

  remove remnants of os::realpath

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/16301/files
  - new: https://git.openjdk.org/jdk/pull/16301/files/050656a0..e181298b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16301&range=10
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16301&range=09-10

  Stats: 10 lines in 2 files changed: 0 ins; 10 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/16301.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16301/head:pull/16301

PR: https://git.openjdk.org/jdk/pull/16301

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