Function runSubprocess

agent/reaper/reaper_test.go:37–58

runSubprocess re-execs the current test binary in a new process running only the named test. This isolates ForkReap's syscall.ForkExec and any process-directed signals (e.g. SIGINT) from the parent test binary, making these tests safe to run in CI and alongside other tests. Returns true inside the

(t *testing.T)

// the real test logic). Returns false in the parent after the
// subprocess exits successfully (caller should return).
func runSubprocess(t *testing.T) bool {
	t.Helper()

	if os.Getenv(subprocessEnvKey) == "1" {
		return true
	}

	ctx := testutil.Context(t, testutil.WaitMedium)

	//nolint:gosec // Test-controlled arguments.
	cmd := exec.CommandContext(ctx, os.Args[0],
		"-test.run=^"+t.Name()+"$",
		"-test.v",
	)
	cmd.Env = append(os.Environ(), subprocessEnvKey+"=1")

	out, err := cmd.CombinedOutput()
	t.Logf("Subprocess output:\n%s", out)
	require.NoError(t, err, "subprocess failed")

	return false
}

// withDone returns options that stop the reaper goroutine when t
// completes and wait for it to fully exit, preventing