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  1. JDK
  2. JDK-8274320

os::fork_and_exec() should be using posix_spawn

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    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 18
    • Fix Version/s: 18
    • Component/s: hotspot
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    • Resolved In Build:
      b22

      Description

      os::fork_and_exec(), used in the hotspot to spawn child programs (scripts etc) in error situations, should be using posix_spawn.

      ATM it uses either `fork()` or `vfork()`. `vfork()` got deprecated on MacOS and we get build errors (JDK-8274293) - even though in this case it would be completely fine to use. This leaves us with `fork()` for MacOS, which has the known problems with large-footprint-parents. This matters here especially since we also use os::fork_and_exec to implement `-XX:OnError` for OOM situations.

      We already use posix_spawn() as default for Runtime.exec() since JDK 15, and it is available on all our Unices. We also should use it here.

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              Assignee:
              stuefe Thomas Stuefe
              Reporter:
              stuefe Thomas Stuefe
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