[all-commits] [llvm/llvm-project] 718fbb: [llvm-exegesis] Kill process that recieve a signal...

[Aiden Grossman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 718fbbef5f18a2b7e7fc4f842b1452ae9bee581a
      https://github.com/llvm/llvm-project/commit/718fbbef5f18a2b7e7fc4f842b1452ae9bee581a
  Author: Aiden Grossman <agrossman154 at yahoo.com>
  Date:   2024-03-21 (Thu, 21 Mar 2024)

  Changed paths:
    M llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp

  Log Message:
  -----------
  [llvm-exegesis] Kill process that recieve a signal (#86069)

Before this patch, llvm-exegesis would leave processes lingering that
experienced signals like segmentation faults. They would up in a
signal-delivery-stop state under the ptrace and never exit. This does
not cause problems (or at least many) in llvm-exegesis as they are
cleaned up after the main process exits, which usually happens quickly.
However, in downstream use, when many blocks are being executed (many of
which run into signals) within a single process, these processes stay
around and can easily exhaust the process limit on some systems.

This patch cleans them up by sending SIGKILL after information about the
signal that was sent has been gathered.



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