[crac] RFR: Improved open file descriptors tracking [v2]

Radim Vansa duke at openjdk.org
Tue Jan 31 17:11:24 UTC 2023

> Tracks `java.io.FileDescriptor` instances as CRaC resource; before checkpoint these are reported and if not allow-listed (e.g. as opened as standard descriptors) an exception is thrown. Further investigation can use system property `jdk.crac.collect-fd-stacktraces=true` to record origin of those file descriptors.
> File descriptors claimed in Java code are passed to native; native code checks all open file descriptors and reports error if there's an unexpected FD that is not included in the list passed previously.

Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:

  Drop native FDs tracking


  - all: https://git.openjdk.org/crac/pull/43/files
  - new: https://git.openjdk.org/crac/pull/43/files/432c3f73..91b223ef

 - full: https://webrevs.openjdk.org/?repo=crac&pr=43&range=01
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=43&range=00-01

  Stats: 93 lines in 6 files changed: 0 ins; 89 del; 4 mod
  Patch: https://git.openjdk.org/crac/pull/43.diff
  Fetch: git fetch https://git.openjdk.org/crac pull/43/head:pull/43

PR: https://git.openjdk.org/crac/pull/43

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