[GR-19220] Add Truffle::Graal.total_compilation_time (#2628)

PullRequest: truffleruby/3236

Author: eregon

src/main/java/org/truffleruby/extra/TruffleGraalNodes.java

@@ -41,6 +41,9 @@
 import com.oracle.truffle.api.frame.MaterializedFrame;
 import com.oracle.truffle.api.nodes.NodeUtil;
 
+import java.lang.management.CompilationMXBean;
+import java.lang.management.ManagementFactory;
+
 @CoreModule("Truffle::Graal")
 public abstract class TruffleGraalNodes {
 
@@ -222,4 +225,18 @@ protected Object blackhole(Object value) {
 
     }
 
+    @CoreMethod(names = "total_compilation_time", onSingleton = true)
+    public abstract static class TotalCompilationTimeNode extends CoreMethodArrayArgumentsNode {
+        private static CompilationMXBean bean;
+
+        @TruffleBoundary
+        @Specialization
+        protected final long totalCompilationTime() {
+            if (bean == null) {
+                bean = ManagementFactory.getCompilationMXBean();
+            }
+
+            return bean.getTotalCompilationTime();
+        }
+    }
 }

tool/jt.rb

@@ -2854,7 +2854,7 @@ def format_specializations_arguments
   end
 
   def format_specializations_check
-    abort 'Some Specializations were not protected.' if format_specializations_visibility
+    abort 'Some Specializations did not use the protected visibility.' if format_specializations_visibility
     abort 'Some Specializations were not properly formatted.' if format_specializations_arguments
     abort 'There were extra blank lines around imports.' if Formatting.format_imports
   end