sync generic_ivtbl

generic_ivtbl is a process global table to maintain instance variables
for non T_OBJECT/T_CLASS/... objects. So we need to protect them
for multi-Ractor exection.

Hint: we can make them Ractor local for unshareable objects, but
      now it is premature optimization.

1 files changed, 17 insertions, 0 deletions

diff --git a/bootstraptest/test_ractor.rb b/bootstraptest/test_ractor.rb
index 05139e2081..eaa265fcfa 100644
--- a/bootstraptest/test_ractor.rb
+++ b/bootstraptest/test_ractor.rb
@@ -780,6 +780,7 @@ assert_equal "#{N}#{N}", %Q{
   }.map{|r| r.take}.join
 }
 
+# enc_table
 assert_equal "#{N/10}", %Q{
   Ractor.new do
     loop do
@@ -794,4 +795,20 @@ assert_equal "#{N/10}", %Q{
   }
 }
 
+# Generic ivtbl
+n = N/2
+assert_equal "#{n}#{n}", %Q{
+  2.times.map{
+    Ractor.new do
+      #{n}.times do
+        obj = ''
+        obj.instance_variable_set("@a", 1)
+        obj.instance_variable_set("@b", 1)
+        obj.instance_variable_set("@c", 1)
+        obj.instance_variable_defined?("@a")
+      end
+    end
+  }.map{|r| r.take}.join
+}
+
 end # if !ENV['GITHUB_WORKFLOW']