merges r22577, r22578 and r22642 from trunk into ruby_1_9_1.

--
* thread.c (thread_cleanup_func): unlock all locked mutexes even when
  forking.  [ruby-core:22269]
--
* bootstraptest/test_thread.rb: fix for environment where fork is not
  available.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@22733 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 16 insertions, 0 deletions

diff --git a/bootstraptest/test_thread.rb b/bootstraptest/test_thread.rb
index ce90737eb..54544df45 100644
--- a/bootstraptest/test_thread.rb
+++ b/bootstraptest/test_thread.rb
@@ -216,6 +216,22 @@ assert_equal 'true', %{
   end
 }
 
+assert_equal 'ok', %{
+  open("zzz.rb", "w") do |f|
+    f.puts <<-END
+      begin
+        Thread.new { fork { GC.start } }.join
+        pid, status = Process.wait2
+        $result = status.success? ? :ok : :ng
+      rescue NotImplementedError
+        $result = :ok
+      end
+    END
+  end
+  require "zzz.rb"
+  $result
+}
+
 assert_finish 3, %{
   th = Thread.new {sleep 2}
   th.join(1)