From ca37c5d41ea806065033c8d6e24ec3820f952a3b Mon Sep 17 00:00:00 2001
From: normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 2 Jul 2018 23:14:52 +0000
Subject: process.c (waitpid_nogvl): start timer thread polling for lossy
 SIGCHLD

For systems with lossy SIGCHLD, an infinitely sleeping timer
thread needs to be aware of rb_waitpid callers in the first
place before it can check and reset polling status.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63829 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 process.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'process.c')

diff --git a/process.c b/process.c
index cf8cc3ac96..695fd72119 100644
--- a/process.c
+++ b/process.c
@@ -1034,6 +1034,9 @@ waitpid_nogvl(void *x)
      * by the time we enter this.  And we may also be interrupted.
      */
     if (!w->ret && !RUBY_VM_INTERRUPTED_ANY(w->ec)) {
+        if (SIGCHLD_LOSSY) {
+            rb_thread_wakeup_timer_thread();
+        }
         rb_native_cond_wait(w->cond, &th->interrupt_lock);
     }
     rb_native_mutex_unlock(&th->interrupt_lock);
-- 
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