[crac] RFR: Report checkpoint processing to jcmd [v18]

[Ilarion Nakonechnyy]

> pass output stream from diagnosticCommand.cpp through java code into os_linux.cpp::VM_crac::doit()

Ilarion Nakonechnyy has updated the pull request incrementally with one additional commit since the last revision:

  corrections for ThreadBlockInVM in effectively_complete

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

Changes:
  - all: https://git.openjdk.org/crac/pull/10/files
  - new: https://git.openjdk.org/crac/pull/10/files/fe6fab9e..5978c933

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=10&range=17
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=10&range=16-17

  Stats: 18 lines in 3 files changed: 7 ins; 2 del; 9 mod
  Patch: https://git.openjdk.org/crac/pull/10.diff
  Fetch: git fetch https://git.openjdk.org/crac pull/10/head:pull/10

PR: https://git.openjdk.org/crac/pull/10