ObjectSpace.each_object with Ractors

Unshareable objects should not be touched from multiple ractors
so ObjectSpace.each_object should be restricted. On multi-ractor
mode, ObjectSpace.each_object only iterates shareable objects.
[Feature #17270]

1 files changed, 9 insertions, 0 deletions

diff --git a/bootstraptest/test_ractor.rb b/bootstraptest/test_ractor.rb
index 94570597ba..a02adb612a 100644
--- a/bootstraptest/test_ractor.rb
+++ b/bootstraptest/test_ractor.rb
@@ -823,6 +823,15 @@ assert_equal '[1, 4, 3, 2, 1]', %q{
   counts.inspect
 }
 
+# ObjectSpace.each_object can not handle unshareable objects with Ractors
+assert_equal '0', %q{
+  Ractor.new{
+    n = 0
+    ObjectSpace.each_object{|o| n += 1 unless Ractor.shareable?(o)}
+    n
+  }.take
+}
+
 ###
 ### Synchronization tests
 ###