jruby · Nov 6, 2014 · Nov 6, 2014
Showing with 13 additions and 2 deletions.

+12 −2 core/src/main/ruby/jruby/kernel/gc.rb

+1 −0 test/mri/excludes/TestGc.rb
diff --git a/core/src/main/ruby/jruby/kernel/gc.rb b/core/src/main/ruby/jruby/kernel/gc.rb
@@ -1,11 +1,13 @@
 module GC
-  def self.stat(all_stats = {})
+  def self.stat(all_stats_or_key = {})
     gc_beans = java.lang.management.ManagementFactory.garbage_collector_mx_beans
     pool_beans = {}
     java.lang.management.ManagementFactory.memory_pool_mx_beans.each do |pool_bean|
       pool_beans[pool_bean.name] = pool_bean
     end
 
+    all_stats = all_stats_or_key.is_a?(Hash) ? all_stats_or_key : {}
+
     all_stats.merge!({
         :count => 0,
         :time => 0,
@@ -53,7 +55,15 @@ def self.stat(all_stats = {})
       end
     end
 
-    all_stats
+    if all_stats_or_key.is_a?(Symbol)
+      if all_stats.key?(all_stats_or_key)
+        all_stats[all_stats_or_key]
+      else
+        raise ArgumentError.new(format("Unknown key %s", all_stats_or_key).force_encoding("UTF-8"))
+      end
+    else
+      all_stats
+    end
   end
 
   begin

diff --git a/test/mri/excludes/TestGc.rb b/test/mri/excludes/TestGc.rb
@@ -16,3 +16,4 @@
 exclude :test_stat, "tests count_objects"
 exclude :test_sweep_in_finalizer, ""
 exclude :test_verify_internal_consistency, ""
+exclude :test_stat_constraints, ""