--- a/hotspot/src/share/vm/prims/whitebox.cpp	Thu Apr 07 12:16:03 2016 +0000
+++ b/hotspot/src/share/vm/prims/whitebox.cpp	Thu Apr 07 16:51:37 2016 +0200
@@ -637,17 +637,26 @@
   return result;
 WB_END
 
-WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
-  // Screen for unavailable/bad comp level
-  if (CompileBroker::compiler(comp_level) == NULL) {
+bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
+  // Screen for unavailable/bad comp level or null method
+  if (method == NULL || CompileBroker::compiler(comp_level) == NULL) {
     return false;
   }
-  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
-  CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
-  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
+  methodHandle mh(THREAD, method);
   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
   MutexLockerEx mu(Compile_lock);
   return (mh->queued_for_compilation() || nm != NULL);
+}
+
+WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
+  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
+  CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
+  return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
+WB_END
+
+WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
+  instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
+  return WhiteBox::compile_method(ikh->class_initializer(), comp_level, InvocationEntryBci, THREAD);
 WB_END
 
 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
@@ -1643,6 +1652,8 @@
       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
   {CC"enqueueMethodForCompilation0",
       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
+  {CC"enqueueInitializerForCompilation0",
+      CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
   {CC"clearMethodState0",
       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},

--- a/hotspot/src/share/vm/prims/whitebox.hpp	Thu Apr 07 12:16:03 2016 +0000
+++ b/hotspot/src/share/vm/prims/whitebox.hpp	Thu Apr 07 16:51:37 2016 +0200
@@ -77,6 +77,7 @@
   static void register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread,
     JNINativeMethod* method_array, int method_count);
   static void register_extended(JNIEnv* env, jclass wbclass, JavaThread* thread);
+  static bool compile_method(Method* method, int comp_level, int bci, Thread* THREAD);
 };