https://git.ruby-lang.org/ruby.git/commit/?id=56ca006784

From 56ca006784d8737463857776a807c6f656ca8455 Mon Sep 17 00:00:00 2001
From: Koichi Sasada <ko1@a...>
Date: Tue, 2 Jun 2020 17:18:09 +0900
Subject: run lldb to investigate the stuck process.

Before sending signals (ABRT, KILL), use lldb to show the
backtrace of a stuck process.

This commit also reverts recent changes for terminate().

diff --git a/tool/lib/envutil.rb b/tool/lib/envutil.rb
index 9d1521b..fb9d1fa 100644
--- a/tool/lib/envutil.rb
+++ b/tool/lib/envutil.rb
@@ -72,20 +72,28 @@ module EnvUtil https://github.com/ruby/ruby/blob/trunk/tool/lib/envutil.rb#L72
   end
   module_function :timeout
 
-  def terminate(pid, signal = :TERM, pgroup = nil, reprieve = 3)
+  def terminate(pid, signal = :TERM, pgroup = nil, reprieve = 1)
     reprieve = apply_timeout_scale(reprieve) if reprieve
 
     signals = Array(signal).select do |sig|
       DEFAULT_SIGNALS[sig.to_s] or
         DEFAULT_SIGNALS[Signal.signame(sig)] rescue false
     end
-    signals |= [:SEGV, :ABRT, :KILL]
+    signals |= [:ABRT, :KILL]
     case pgroup
     when 0, true
       pgroup = -pid
     when nil, false
       pgroup = pid
     end
+
+    if /darwin/ =~ RUBY_PLATFORM
+      # sudo -n: --non-interactive
+      # lldb -p: attach
+      #      -o: run command
+      puts `sudo -n lldb -p #{pid} --batch -o "bt all" -o "call rb_vmdebug_stack_dump_all_threads()" -o quit`
+    end
+
     while signal = signals.shift
       begin
         Process.kill signal, pgroup
-- 
cgit v0.10.2


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