* thread.c (thread_cleanup_func): delete locking_mutex when thread

object become dummy because of fork.  [ruby-core:26744]
  [ruby-core:26745]

* bootstraptest/test_thread.rb: add a test for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25771 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Mon Nov 16 00:06:26 2009  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* thread.c (thread_cleanup_func): delete locking_mutex when thread
+	  object become dummy because of fork.  [ruby-core:26744]
+	  [ruby-core:26745]
+
+	* bootstraptest/test_thread.rb: add a test for above.
+
 Sat Nov 14 21:54:46 2009  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* class.c (rb_mod_init_copy): fix memory leak of Class#dup.

bootstraptest/test_thread.rb

@@ -385,3 +385,26 @@ assert_equal 'ok', %q{
   end
   :ok
 }
+
+assert_equal 'ok', %{
+  open("zzz.rb", "w") do |f|
+    f.puts <<-END
+      begin
+        m = Mutex.new
+        Thread.new { m.lock; sleep 1 }
+        sleep 0.3
+        Thread.new do
+          sleep 0.3
+          fork { GC.start }
+        end
+        m.lock
+        pid, status = Process.wait2
+        $result = status.success? ? :ok : :ng
+      rescue NotImplementedError
+        $result = :ok
+      end
+    END
+  end
+  require "./zzz.rb"
+  $result
+}

thread.c

@@ -380,6 +380,7 @@ thread_cleanup_func(void *th_ptr)
 	rb_mutex_unlock_all(th->keeping_mutexes, th);
 	th->keeping_mutexes = NULL;
     }
+    th->locking_mutex = Qfalse;
     thread_cleanup_func_before_exec(th_ptr);
     native_thread_destroy(th);
 }