Module: Henitai::Integration::ChildBootstrap

Defined in:
lib/henitai/integration/child_bootstrap.rb

Overview

The first thing a forked mutant child does, before any test-framework work begins.

Extracted from the fork block so the sequence is named and unit-testable without forking, and so both the RSpec and Minitest paths -- which share MutantRunSupport#spawn_mutant -- get identical treatment.

Class Method Summary collapse

Class Method Details

.after_fork!(parent_pid:) ⇒ Object

Parameters:

  • parent_pid (Integer) —

    captured in the parent before Process.fork. Reading Process.ppid here instead would race the very death the watchdog is looking for: a parent that dies between fork and this line leaves the child with ppid 1 as its baseline, making it look permanently healthy.



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# File 'lib/henitai/integration/child_bootstrap.rb', line 17

def self.after_fork!(parent_pid:)
  # First, so that even a crash later in this method releases the
  # reports-directory lock rather than pinning it with an inherited fd.
  InheritedFdRegistry.close_all!
  Process.setpgid(0, 0)
  OrphanWatchdog.start(parent_pid:)
  nil
end