# HG changeset patch
# User twisti
# Date 1391807860 0
#      Fri Feb 07 21:17:40 2014 +0000
# Node ID a66016d23db17dbe4b8d54b1680f732a116e0a4c
# Parent  38ae397aa523096aa3f94d23e1a38aa75e55f8f5
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
Reviewed-by: jrose, kvn

diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/ci/ciClassList.hpp
--- openjdk/hotspot/src/share/vm/ci/ciClassList.hpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/ci/ciClassList.hpp	Fri Feb 07 21:17:40 2014 +0000
@@ -49,6 +49,7 @@
 class     ciCallSite;
 class     ciMemberName;
 class     ciMethodHandle;
+class     ciMethodType;
 class   ciMethod;
 class   ciMethodData;
 class     ciReceiverTypeData;  // part of ciMethodData
@@ -105,6 +106,7 @@
 friend class ciMethod;                 \
 friend class ciMethodData;             \
 friend class ciMethodHandle;           \
+friend class ciMethodType;             \
 friend class ciReceiverTypeData;       \
 friend class ciSymbol;                 \
 friend class ciArray;                  \
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/ci/ciMethodType.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ openjdk/hotspot/src/share/vm/ci/ciMethodType.hpp	Fri Feb 07 21:17:40 2014 +0000
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_CI_CIMETHODTYPE_HPP
+#define SHARE_VM_CI_CIMETHODTYPE_HPP
+
+#include "ci/ciInstance.hpp"
+#include "ci/ciUtilities.hpp"
+#include "classfile/javaClasses.hpp"
+
+// ciMethodType
+//
+// The class represents a java.lang.invoke.MethodType object.
+class ciMethodType : public ciInstance {
+private:
+  ciType* class_to_citype(oop klass_oop) const {
+    if (java_lang_Class::is_primitive(klass_oop)) {
+      BasicType bt = java_lang_Class::primitive_type(klass_oop);
+      return ciType::make(bt);
+    } else {
+      klassOop k = java_lang_Class::as_klassOop(klass_oop);
+      return CURRENT_ENV->get_object(k)->as_klass();
+    }
+  }
+
+public:
+  ciMethodType(instanceHandle h_i) : ciInstance(h_i) {}
+
+  // What kind of ciObject is this?
+  bool is_method_type() const { return true; }
+
+  ciType* rtype() const {
+    GUARDED_VM_ENTRY(
+      oop rtype = java_lang_invoke_MethodType::rtype(get_oop());
+      return class_to_citype(rtype);
+    )
+  }
+
+  int ptype_count() const {
+    GUARDED_VM_ENTRY(return java_lang_invoke_MethodType::ptype_count(get_oop());)
+  }
+
+  int ptype_slot_count() const {
+    GUARDED_VM_ENTRY(return java_lang_invoke_MethodType::ptype_slot_count(get_oop());)
+  }
+
+  ciType* ptype_at(int index) const {
+    GUARDED_VM_ENTRY(
+      oop ptype = java_lang_invoke_MethodType::ptype(get_oop(), index);
+      return class_to_citype(ptype);
+    )
+  }
+};
+
+#endif // SHARE_VM_CI_CIMETHODTYPE_HPP
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/ci/ciObject.hpp
--- openjdk/hotspot/src/share/vm/ci/ciObject.hpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/ci/ciObject.hpp	Fri Feb 07 21:17:40 2014 +0000
@@ -146,6 +146,7 @@
   virtual bool is_method()                  { return false; }
   virtual bool is_method_data()             { return false; }
   virtual bool is_method_handle()     const { return false; }
+  virtual bool is_method_type()       const { return false; }
   virtual bool is_array()                   { return false; }
   virtual bool is_obj_array()               { return false; }
   virtual bool is_type_array()              { return false; }
@@ -193,103 +194,107 @@
   }
 
   // Subclass casting with assertions.
-  ciNullObject*            as_null_object() {
+  ciNullObject* as_null_object() {
     assert(is_null_object(), "bad cast");
     return (ciNullObject*)this;
   }
-  ciCallSite*              as_call_site() {
+  ciCallSite* as_call_site() {
     assert(is_call_site(), "bad cast");
-    return (ciCallSite*) this;
+    return (ciCallSite*)this;
   }
-  ciCPCache*               as_cpcache() {
+  ciCPCache* as_cpcache() {
     assert(is_cpcache(), "bad cast");
-    return (ciCPCache*) this;
+    return (ciCPCache*)this;
   }
-  ciInstance*              as_instance() {
+  ciInstance* as_instance() {
     assert(is_instance(), "bad cast");
     return (ciInstance*)this;
   }
-  ciMemberName*            as_member_name() {
+  ciMemberName* as_member_name() {
     assert(is_member_name(), "bad cast");
     return (ciMemberName*)this;
   }
-  ciMethod*                as_method() {
+  ciMethod* as_method() {
     assert(is_method(), "bad cast");
     return (ciMethod*)this;
   }
-  ciMethodData*            as_method_data() {
+  ciMethodData* as_method_data() {
     assert(is_method_data(), "bad cast");
     return (ciMethodData*)this;
   }
-  ciMethodHandle*          as_method_handle() {
+  ciMethodHandle* as_method_handle() {
     assert(is_method_handle(), "bad cast");
-    return (ciMethodHandle*) this;
+    return (ciMethodHandle*)this;
   }
-  ciArray*                 as_array() {
+  ciMethodType* as_method_type() {
+    assert(is_method_type(), "bad cast");
+    return (ciMethodType*)this;
+  }
+  ciArray* as_array() {
     assert(is_array(), "bad cast");
     return (ciArray*)this;
   }
-  ciObjArray*              as_obj_array() {
+  ciObjArray* as_obj_array() {
     assert(is_obj_array(), "bad cast");
     return (ciObjArray*)this;
   }
-  ciTypeArray*             as_type_array() {
+  ciTypeArray* as_type_array() {
     assert(is_type_array(), "bad cast");
     return (ciTypeArray*)this;
   }
-  ciSymbol*                as_symbol() {
+  ciSymbol* as_symbol() {
     assert(is_symbol(), "bad cast");
     return (ciSymbol*)this;
   }
-  ciType*                  as_type() {
+  ciType* as_type() {
     assert(is_type(), "bad cast");
     return (ciType*)this;
   }
-  ciReturnAddress*         as_return_address() {
+  ciReturnAddress* as_return_address() {
     assert(is_return_address(), "bad cast");
     return (ciReturnAddress*)this;
   }
-  ciKlass*                 as_klass() {
+  ciKlass* as_klass() {
     assert(is_klass(), "bad cast");
     return (ciKlass*)this;
   }
-  ciInstanceKlass*         as_instance_klass() {
+  ciInstanceKlass* as_instance_klass() {
     assert(is_instance_klass(), "bad cast");
     return (ciInstanceKlass*)this;
   }
-  ciMethodKlass*           as_method_klass() {
+  ciMethodKlass* as_method_klass() {
     assert(is_method_klass(), "bad cast");
     return (ciMethodKlass*)this;
   }
-  ciArrayKlass*            as_array_klass() {
+  ciArrayKlass* as_array_klass() {
     assert(is_array_klass(), "bad cast");
     return (ciArrayKlass*)this;
   }
-  ciObjArrayKlass*         as_obj_array_klass() {
+  ciObjArrayKlass* as_obj_array_klass() {
     assert(is_obj_array_klass(), "bad cast");
     return (ciObjArrayKlass*)this;
   }
-  ciTypeArrayKlass*        as_type_array_klass() {
+  ciTypeArrayKlass* as_type_array_klass() {
     assert(is_type_array_klass(), "bad cast");
     return (ciTypeArrayKlass*)this;
   }
-  ciKlassKlass*            as_klass_klass() {
+  ciKlassKlass* as_klass_klass() {
     assert(is_klass_klass(), "bad cast");
     return (ciKlassKlass*)this;
   }
-  ciInstanceKlassKlass*    as_instance_klass_klass() {
+  ciInstanceKlassKlass* as_instance_klass_klass() {
     assert(is_instance_klass_klass(), "bad cast");
     return (ciInstanceKlassKlass*)this;
   }
-  ciArrayKlassKlass*       as_array_klass_klass() {
+  ciArrayKlassKlass* as_array_klass_klass() {
     assert(is_array_klass_klass(), "bad cast");
     return (ciArrayKlassKlass*)this;
   }
-  ciObjArrayKlassKlass*    as_obj_array_klass_klass() {
+  ciObjArrayKlassKlass* as_obj_array_klass_klass() {
     assert(is_obj_array_klass_klass(), "bad cast");
     return (ciObjArrayKlassKlass*)this;
   }
-  ciTypeArrayKlassKlass*   as_type_array_klass_klass() {
+  ciTypeArrayKlassKlass* as_type_array_klass_klass() {
     assert(is_type_array_klass_klass(), "bad cast");
     return (ciTypeArrayKlassKlass*)this;
   }
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/ci/ciObjectFactory.cpp
--- openjdk/hotspot/src/share/vm/ci/ciObjectFactory.cpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/ci/ciObjectFactory.cpp	Fri Feb 07 21:17:40 2014 +0000
@@ -32,6 +32,7 @@
 #include "ci/ciMethod.hpp"
 #include "ci/ciMethodData.hpp"
 #include "ci/ciMethodHandle.hpp"
+#include "ci/ciMethodType.hpp"
 #include "ci/ciMethodKlass.hpp"
 #include "ci/ciNullObject.hpp"
 #include "ci/ciObjArray.hpp"
@@ -349,6 +350,8 @@
       return new (arena()) ciMemberName(h_i);
     else if (java_lang_invoke_MethodHandle::is_instance(o))
       return new (arena()) ciMethodHandle(h_i);
+    else if (java_lang_invoke_MethodType::is_instance(o))
+      return new (arena()) ciMethodType(h_i);
     else
       return new (arena()) ciInstance(h_i);
   } else if (o->is_objArray()) {
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/ci/ciSignature.cpp
--- openjdk/hotspot/src/share/vm/ci/ciSignature.cpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/ci/ciSignature.cpp	Fri Feb 07 21:17:40 2014 +0000
@@ -23,6 +23,7 @@
  */
 
 #include "precompiled.hpp"
+#include "ci/ciMethodType.hpp"
 #include "ci/ciSignature.hpp"
 #include "ci/ciUtilities.hpp"
 #include "memory/allocation.inline.hpp"
@@ -80,6 +81,24 @@
 }
 
 // ------------------------------------------------------------------
+// ciSignature::ciSignature
+ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol, ciMethodType* method_type) :
+  _symbol(symbol),
+  _accessing_klass(accessing_klass),
+  _size( method_type->ptype_slot_count()),
+  _count(method_type->ptype_count())
+{
+  ASSERT_IN_VM;
+  EXCEPTION_CONTEXT;
+  Arena* arena = CURRENT_ENV->arena();
+  _types = new (arena) GrowableArray<ciType*>(arena, _count + 1, 0, NULL);
+  for (int i = 0; i < _count; i++) {
+    _types->append(method_type->ptype_at(i));
+  }
+  _types->append(method_type->rtype());
+}
+
+// ------------------------------------------------------------------
 // ciSignature::return_type
 //
 // What is the return type of this signature?
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/ci/ciSignature.hpp
--- openjdk/hotspot/src/share/vm/ci/ciSignature.hpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/ci/ciSignature.hpp	Fri Feb 07 21:17:40 2014 +0000
@@ -47,6 +47,7 @@
   friend class ciObjectFactory;
 
   ciSignature(ciKlass* accessing_klass, constantPoolHandle cpool, ciSymbol* signature);
+  ciSignature(ciKlass* accessing_klass,                           ciSymbol* signature, ciMethodType* method_type);
 
   void get_all_klasses();
 
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/ci/ciStreams.cpp
--- openjdk/hotspot/src/share/vm/ci/ciStreams.cpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/ci/ciStreams.cpp	Fri Feb 07 21:17:40 2014 +0000
@@ -363,12 +363,15 @@
   constantPoolHandle cpool(_method->get_methodOop()->constants());
   ciMethod* m = env->get_method_by_index(cpool, get_method_index(), cur_bc(), _holder);
   will_link = m->is_loaded();
-  // Get declared method signature and return it.
-  if (has_optional_appendix()) {
-    const int sig_index = get_method_signature_index();
-    Symbol* sig_sym = cpool->symbol_at(sig_index);
-    ciKlass* pool_holder = env->get_object(cpool->pool_holder())->as_klass();
-    (*declared_signature_result) = new (env->arena()) ciSignature(pool_holder, cpool, env->get_symbol(sig_sym));
+
+  // Use the MethodType stored in the CP cache to create a signature
+  // with correct types (in respect to class loaders).
+  if (has_method_type()) {
+    ciSymbol*     sig_sym     = env->get_symbol(cpool->symbol_at(get_method_signature_index()));
+    ciKlass*      pool_holder = env->get_object(cpool->pool_holder())->as_klass();
+    ciMethodType* method_type = get_method_type();
+    ciSignature* declared_signature = new (env->arena()) ciSignature(pool_holder, sig_sym, method_type);
+    (*declared_signature_result) = declared_signature;
   } else {
     (*declared_signature_result) = m->signature();
   }
@@ -399,6 +402,31 @@
 }
 
 // ------------------------------------------------------------------
+// ciBytecodeStream::has_method_type
+//
+// Returns true if there is a MethodType argument stored in the
+// constant pool cache at the current bci.
+bool ciBytecodeStream::has_method_type() {
+  GUARDED_VM_ENTRY(
+    constantPoolHandle cpool(_method->get_methodOop()->constants());
+    return constantPoolOopDesc::has_method_type_at_if_loaded(cpool, get_method_index());
+  )
+}
+
+// ------------------------------------------------------------------
+// ciBytecodeStream::get_method_type
+//
+// Return the MethodType stored in the constant pool cache at
+// the current bci.
+ciMethodType* ciBytecodeStream::get_method_type() {
+  GUARDED_VM_ENTRY(
+    constantPoolHandle cpool(_method->get_methodOop()->constants());
+    oop method_type_oop = constantPoolOopDesc::method_type_at_if_loaded(cpool, get_method_index());
+    return CURRENT_ENV->get_object(method_type_oop)->as_method_type();
+  )
+}
+
+// ------------------------------------------------------------------
 // ciBytecodeStream::get_declared_method_holder
 //
 // Get the declared holder of the currently referenced method.
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/ci/ciStreams.hpp
--- openjdk/hotspot/src/share/vm/ci/ciStreams.hpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/ci/ciStreams.hpp	Fri Feb 07 21:17:40 2014 +0000
@@ -259,12 +259,14 @@
   int      get_field_holder_index();
   int      get_field_signature_index();
 
-  ciMethod* get_method(bool& will_link, ciSignature* *declared_signature_result);
-  bool      has_appendix();
-  ciObject* get_appendix();
-  ciKlass*  get_declared_method_holder();
-  int       get_method_holder_index();
-  int       get_method_signature_index();
+  ciMethod*     get_method(bool& will_link, ciSignature* *declared_signature_result);
+  bool          has_appendix();
+  ciObject*     get_appendix();
+  bool          has_method_type();
+  ciMethodType* get_method_type();
+  ciKlass*      get_declared_method_holder();
+  int           get_method_holder_index();
+  int           get_method_signature_index();
 
   ciCPCache*  get_cpcache() const;
   ciCallSite* get_call_site();
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/classfile/systemDictionary.cpp
--- openjdk/hotspot/src/share/vm/classfile/systemDictionary.cpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/classfile/systemDictionary.cpp	Fri Feb 07 21:17:40 2014 +0000
@@ -2432,7 +2432,8 @@
 methodHandle SystemDictionary::find_method_handle_invoker(Symbol* name,
                                                           Symbol* signature,
                                                           KlassHandle accessing_klass,
-                                                          Handle* appendix_result,
+                                                          Handle *appendix_result,
+                                                          Handle *method_type_result,
                                                           TRAPS) {
   methodHandle empty;
   assert(EnableInvokeDynamic, "");
@@ -2464,6 +2465,7 @@
                          vmSymbols::linkMethod_signature(),
                          &args, CHECK_(empty));
   Handle mname(THREAD, (oop) result.get_jobject());
+  (*method_type_result) = method_type;
   return unpack_method_and_appendix(mname, appendix_box, appendix_result, THREAD);
 }
 
@@ -2610,7 +2612,8 @@
                                                               Handle bootstrap_specifier,
                                                               Symbol* name,
                                                               Symbol* type,
-                                                              Handle* appendix_result,
+                                                              Handle *appendix_result,
+                                                              Handle *method_type_result,
                                                               TRAPS) {
   methodHandle empty;
   Handle bsm, info;
@@ -2653,6 +2656,7 @@
                          vmSymbols::linkCallSite_signature(),
                          &args, CHECK_(empty));
   Handle mname(THREAD, (oop) result.get_jobject());
+  (*method_type_result) = method_type;
   return unpack_method_and_appendix(mname, appendix_box, appendix_result, THREAD);
 }
 
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/classfile/systemDictionary.hpp
--- openjdk/hotspot/src/share/vm/classfile/systemDictionary.hpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/classfile/systemDictionary.hpp	Fri Feb 07 21:17:40 2014 +0000
@@ -488,6 +488,7 @@
                                                  Symbol* signature,
                                                  KlassHandle accessing_klass,
                                                  Handle *appendix_result,
+                                                 Handle *method_type_result,
                                                  TRAPS);
   // for a given signature, find the internal MethodHandle method (linkTo* or invokeBasic)
   // (does not ask Java, since this is a low-level intrinsic defined by the JVM)
@@ -514,6 +515,7 @@
                                                      Symbol* name,
                                                      Symbol* type,
                                                      Handle *appendix_result,
+                                                     Handle *method_type_result,
                                                      TRAPS);
 
   // Utility for printing loader "name" as part of tracing constraints
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/interpreter/bytecodeInterpreter.cpp
--- openjdk/hotspot/src/share/vm/interpreter/bytecodeInterpreter.cpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/interpreter/bytecodeInterpreter.cpp	Fri Feb 07 21:17:40 2014 +0000
@@ -2216,12 +2216,11 @@
         methodOop method = cache->f1_as_method();
         VERIFY_OOP(method);
 
-	/** Re-enabled in 7200949
         if (cache->has_appendix()) {
           constantPoolOop constants = METHOD->constants();
           SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0);
           MORE_STACK(1);
-	  } **/
+	}
 
         istate->set_msg(call_method);
         istate->set_callee(method);
@@ -2249,12 +2248,11 @@
 
         VERIFY_OOP(method);
 
-	/** Re-enabled in 7200949
         if (cache->has_appendix()) {
           constantPoolOop constants = METHOD->constants();
           SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0);
           MORE_STACK(1);
-	  } **/
+	}
 
         istate->set_msg(call_method);
         istate->set_callee(method);
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/interpreter/interpreterRuntime.cpp
--- openjdk/hotspot/src/share/vm/interpreter/interpreterRuntime.cpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/interpreter/interpreterRuntime.cpp	Fri Feb 07 21:17:40 2014 +0000
@@ -764,7 +764,8 @@
   cache_entry(thread)->set_method_handle(
       pool,
       info.resolved_method(),
-      info.resolved_appendix());
+      info.resolved_appendix(),
+      info.resolved_method_type());
 }
 IRT_END
 
@@ -791,7 +792,8 @@
   pool->cache()->secondary_entry_at(index)->set_dynamic_call(
       pool,
       info.resolved_method(),
-      info.resolved_appendix());
+      info.resolved_appendix(),
+      info.resolved_method_type());
 }
 IRT_END
 
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/interpreter/linkResolver.cpp
--- openjdk/hotspot/src/share/vm/interpreter/linkResolver.cpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/interpreter/linkResolver.cpp	Fri Feb 07 21:17:40 2014 +0000
@@ -99,7 +99,7 @@
   assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
 }
 
-void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, TRAPS) {
+void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) {
   if (resolved_method.is_null()) {
     THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
   }
@@ -110,7 +110,8 @@
   int vtable_index = methodOopDesc::nonvirtual_vtable_index;
   assert(resolved_method->vtable_index() == vtable_index, "");
   set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
-  _resolved_appendix = resolved_appendix;
+  _resolved_appendix    = resolved_appendix;
+  _resolved_method_type = resolved_method_type;
 }
 
 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
@@ -221,7 +222,8 @@
 void LinkResolver::lookup_polymorphic_method(methodHandle& result,
                                              KlassHandle klass, Symbol* name, Symbol* full_signature,
                                              KlassHandle current_klass,
-                                             Handle* appendix_result_or_null,
+                                             Handle *appendix_result_or_null,
+                                             Handle *method_type_result,
                                              TRAPS) {
   vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
   if (TraceMethodHandles) {
@@ -275,10 +277,12 @@
       }
 
       Handle appendix;
+      Handle method_type;
       result = SystemDictionary::find_method_handle_invoker(name,
                                                             full_signature,
                                                             current_klass,
                                                             &appendix,
+                                                            &method_type,
                                                             CHECK);
       if (TraceMethodHandles) {
         tty->print("lookup_polymorphic_method => (via Java) ");
@@ -307,6 +311,7 @@
 
         assert(appendix_result_or_null != NULL, "");
         (*appendix_result_or_null) = appendix;
+        (*method_type_result)      = method_type;
         return;
       }
     }
@@ -419,7 +424,7 @@
     if (resolved_method.is_null()) {
       // JSR 292:  see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
       lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
-                                current_klass, (Handle*)NULL, THREAD);
+                                current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
       if (HAS_PENDING_EXCEPTION) {
         nested_exception = Handle(THREAD, PENDING_EXCEPTION);
         CLEAR_PENDING_EXCEPTION;
@@ -1207,11 +1212,12 @@
   assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
   assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
   methodHandle resolved_method;
-  Handle resolved_appendix;
+  Handle       resolved_appendix;
+  Handle       resolved_method_type;
   lookup_polymorphic_method(resolved_method, resolved_klass,
                             method_name, method_signature,
-                            current_klass, &resolved_appendix, CHECK);
-  result.set_handle(resolved_method, resolved_appendix, CHECK);
+                            current_klass, &resolved_appendix, &resolved_method_type, CHECK);
+  result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
 }
 
 
@@ -1219,7 +1225,7 @@
   assert(EnableInvokeDynamic, "");
   pool->set_invokedynamic();    // mark header to flag active call sites
 
-  //resolve_pool(<resolved_klass>, method_name,  method_signature, current_klass, pool, index, CHECK);
+  //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
   Symbol* method_name       = pool->name_ref_at(index);
   Symbol* method_signature  = pool->signature_ref_at(index);
   KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
@@ -1236,9 +1242,10 @@
     bootstrap_specifier = Handle(THREAD, bsm_info);
   }
   if (!cpce->is_f1_null()) {
-    methodHandle method(THREAD, cpce->f2_as_vfinal_method());
-    Handle appendix(THREAD, cpce->has_appendix() ? cpce->f1_appendix() : (oop)NULL);
-    result.set_handle(method, appendix, CHECK);
+    methodHandle method(     THREAD, cpce->f2_as_vfinal_method());
+    Handle       appendix(   THREAD, cpce->appendix_if_resolved(pool));
+    Handle       method_type(THREAD, cpce->method_type_if_resolved(pool));
+    result.set_handle(method, appendix, method_type, CHECK);
     return;
   }
 
@@ -1260,11 +1267,13 @@
   // JSR 292:  this must resolve to an implicitly generated method MH.linkToCallSite(*...)
   // The appendix argument is likely to be a freshly-created CallSite.
   Handle       resolved_appendix;
+  Handle       resolved_method_type;
   methodHandle resolved_method =
     SystemDictionary::find_dynamic_call_site_invoker(current_klass,
                                                      bootstrap_specifier,
                                                      method_name, method_signature,
                                                      &resolved_appendix,
+                                                     &resolved_method_type,
                                                      CHECK);
   if (HAS_PENDING_EXCEPTION) {
     if (TraceMethodHandles) {
@@ -1285,7 +1294,7 @@
     THROW_MSG_CAUSE(vmSymbols::java_lang_BootstrapMethodError(),
                     "BootstrapMethodError", nested_exception)
   }
-  result.set_handle(resolved_method, resolved_appendix, CHECK);
+  result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
 }
 
 //------------------------------------------------------------------------------------------------------------------------
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/interpreter/linkResolver.hpp
--- openjdk/hotspot/src/share/vm/interpreter/linkResolver.hpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/interpreter/linkResolver.hpp	Fri Feb 07 21:17:40 2014 +0000
@@ -76,12 +76,13 @@
   methodHandle _selected_method;        // dynamic (actual) target method
   int          _vtable_index;           // vtable index of selected method
   Handle       _resolved_appendix;      // extra argument in constant pool (if CPCE::has_appendix)
+  Handle       _resolved_method_type;   // MethodType (for invokedynamic and invokehandle call sites)
 
-  void         set_static(   KlassHandle resolved_klass,                             methodHandle resolved_method                                                , TRAPS);
-  void         set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method                  , TRAPS);
-  void         set_virtual(  KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS);
-  void         set_handle(                                                           methodHandle resolved_method,   Handle resolved_appendix,                     TRAPS);
-  void         set_common(   KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS);
+  void         set_static(   KlassHandle resolved_klass,                             methodHandle resolved_method                                                       , TRAPS);
+  void         set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method                         , TRAPS);
+  void         set_virtual(  KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index       , TRAPS);
+  void         set_handle(                                                           methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS);
+  void         set_common(   KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index       , TRAPS);
 
   friend class LinkResolver;
 
@@ -91,6 +92,7 @@
   methodHandle resolved_method() const           { return _resolved_method; }
   methodHandle selected_method() const           { return _selected_method; }
   Handle       resolved_appendix() const         { return _resolved_appendix; }
+  Handle       resolved_method_type() const      { return _resolved_method_type; }
 
   BasicType    result_type() const               { return selected_method()->result_type(); }
   bool         has_vtable_index() const          { return _vtable_index >= 0; }
@@ -113,7 +115,7 @@
   static void lookup_instance_method_in_klasses (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS);
   static void lookup_method_in_interfaces       (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS);
   static void lookup_polymorphic_method         (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature,
-                                                 KlassHandle current_klass, Handle* appendix_result_or_null, TRAPS);
+                                                 KlassHandle current_klass, Handle *appendix_result_or_null, Handle *method_type_result, TRAPS);
 
   static int vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS);
 
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/interpreter/rewriter.cpp
--- openjdk/hotspot/src/share/vm/interpreter/rewriter.cpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/interpreter/rewriter.cpp	Fri Feb 07 21:17:40 2014 +0000
@@ -163,10 +163,14 @@
       if (status == 0) {
         if (_pool->klass_ref_at_noresolve(cp_index) == vmSymbols::java_lang_invoke_MethodHandle() &&
             MethodHandles::is_signature_polymorphic_name(SystemDictionary::MethodHandle_klass(),
-                                                         _pool->name_ref_at(cp_index)))
+                                                         _pool->name_ref_at(cp_index))) {
+          assert(has_cp_cache(cp_index), "should already have an entry");
+          int cpc  = maybe_add_cp_cache_entry(cp_index);  // should already have an entry
+          int cpc2 = add_secondary_cp_cache_entry(cpc);
           status = +1;
-        else
+        } else {
           status = -1;
+        }
         _method_handle_invokers[cp_index] = status;
       }
       // We use a special internal bytecode for such methods (if non-static).
@@ -195,6 +199,10 @@
     int cp_index = Bytes::get_Java_u2(p);
     int cpc  = maybe_add_cp_cache_entry(cp_index);  // add lazily
     int cpc2 = add_secondary_cp_cache_entry(cpc);
+    // The second secondary entry is required to store the MethodType and
+    // must be the next entry.
+    int cpc3 = add_secondary_cp_cache_entry(cpc);
+    assert(cpc2 + 1 == cpc3, err_msg_res("must be consecutive: %d + 1 == %d", cpc2, cpc3));
 
     // Replace the trailing four bytes with a CPC index for the dynamic
     // call site.  Unlike other CPC entries, there is one per bytecode,
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/oops/constantPoolOop.cpp
--- openjdk/hotspot/src/share/vm/oops/constantPoolOop.cpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/oops/constantPoolOop.cpp	Fri Feb 07 21:17:40 2014 +0000
@@ -270,13 +270,7 @@
                                                    int which) {
   assert(!constantPoolCacheOopDesc::is_secondary_index(which), "no indy instruction here");
   if (cpool->cache() == NULL)  return NULL;  // nothing to load yet
-  int cache_index = get_cpcache_index(which);
-  if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) {
-    if (PrintMiscellaneous && (Verbose||WizardMode)) {
-      tty->print_cr("bad operand %d in:", which); cpool->print();
-    }
-    return NULL;
-  }
+  int cache_index = decode_cpcache_index(which, true);
   ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
   return e->method_if_resolved(cpool);
 }
@@ -284,44 +278,33 @@
 
 bool constantPoolOopDesc::has_appendix_at_if_loaded(constantPoolHandle cpool, int which) {
   if (cpool->cache() == NULL)  return false;  // nothing to load yet
-  // XXX Is there a simpler way to get to the secondary entry?
-  ConstantPoolCacheEntry* e;
-  if (constantPoolCacheOopDesc::is_secondary_index(which)) {
-    e = cpool->cache()->secondary_entry_at(which);
-  } else {
-    int cache_index = get_cpcache_index(which);
-    if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) {
-      if (PrintMiscellaneous && (Verbose||WizardMode)) {
-        tty->print_cr("bad operand %d in:", which); cpool->print();
-      }
-      return false;
-    }
-    e = cpool->cache()->entry_at(cache_index);
-  }
+  int cache_index = decode_cpcache_index(which, true);
+  ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
   return e->has_appendix();
 }
 
 
 oop constantPoolOopDesc::appendix_at_if_loaded(constantPoolHandle cpool, int which) {
   if (cpool->cache() == NULL)  return NULL;  // nothing to load yet
-  // XXX Is there a simpler way to get to the secondary entry?
-  ConstantPoolCacheEntry* e;
-  if (constantPoolCacheOopDesc::is_secondary_index(which)) {
-    e = cpool->cache()->secondary_entry_at(which);
-  } else {
-    int cache_index = get_cpcache_index(which);
-    if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) {
-      if (PrintMiscellaneous && (Verbose||WizardMode)) {
-        tty->print_cr("bad operand %d in:", which); cpool->print();
-      }
-      return NULL;
-    }
-    e = cpool->cache()->entry_at(cache_index);
-  }
-  if (!e->has_appendix()) {
-    return NULL;
-  }
-  return e->f1_as_instance();
+  int cache_index = decode_cpcache_index(which, true);
+  ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
+  return e->appendix_if_resolved(cpool);
+}
+
+
+bool constantPoolOopDesc::has_method_type_at_if_loaded(constantPoolHandle cpool, int which) {
+  if (cpool->cache() == NULL)  return false;  // nothing to load yet
+  int cache_index = decode_cpcache_index(which, true);
+  ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
+  return e->has_method_type();
+}
+
+oop constantPoolOopDesc::method_type_at_if_loaded(constantPoolHandle cpool, int which) {
+  if (cpool->cache() == NULL)  return NULL;  // nothing to load yet
+  int cache_index = decode_cpcache_index(which, true);
+  ConstantPoolCacheEntry* e  = cpool->cache()->entry_at(cache_index);  // get next CPC entry
+  ConstantPoolCacheEntry* e2 = cpool->cache()->find_secondary_entry_for(e);
+  return e2->method_type_if_resolved(cpool);
 }
 
 
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/oops/constantPoolOop.hpp
--- openjdk/hotspot/src/share/vm/oops/constantPoolOop.hpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/oops/constantPoolOop.hpp	Fri Feb 07 21:17:40 2014 +0000
@@ -674,6 +674,8 @@
   static methodOop       method_at_if_loaded      (constantPoolHandle this_oop, int which);
   static bool      has_appendix_at_if_loaded      (constantPoolHandle this_oop, int which);
   static oop           appendix_at_if_loaded      (constantPoolHandle this_oop, int which);
+  static bool   has_method_type_at_if_loaded      (constantPoolHandle this_oop, int which);
+  static oop        method_type_at_if_loaded      (constantPoolHandle this_oop, int which);
   static klassOop         klass_at_if_loaded      (constantPoolHandle this_oop, int which);
   static klassOop     klass_ref_at_if_loaded      (constantPoolHandle this_oop, int which);
   // Same as above - but does LinkResolving.
@@ -704,6 +706,12 @@
 #endif //ASSERT
 
   static int get_cpcache_index(int index) { return index - CPCACHE_INDEX_TAG; }
+  static int decode_cpcache_index(int raw_index, bool invokedynamic_ok = false) {
+    if (invokedynamic_ok && constantPoolCacheOopDesc::is_secondary_index(raw_index))
+      return constantPoolCacheOopDesc::decode_secondary_index(raw_index);
+    else
+      return get_cpcache_index(raw_index);
+  }
 
  private:
 
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/oops/cpCacheOop.cpp
--- openjdk/hotspot/src/share/vm/oops/cpCacheOop.cpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/oops/cpCacheOop.cpp	Fri Feb 07 21:17:40 2014 +0000
@@ -266,21 +266,23 @@
 
 
 void ConstantPoolCacheEntry::set_method_handle(constantPoolHandle cpool,
-                                               methodHandle adapter, Handle appendix) {
+                                               methodHandle adapter,
+                                               Handle appendix, Handle method_type) {
   assert(!is_secondary_entry(), "");
-  set_method_handle_common(cpool, Bytecodes::_invokehandle, adapter, appendix);
+  set_method_handle_common(cpool, Bytecodes::_invokehandle, adapter, appendix, method_type);
 }
 
 void ConstantPoolCacheEntry::set_dynamic_call(constantPoolHandle cpool,
-                                              methodHandle adapter, Handle appendix) {
+                                              methodHandle adapter,
+                                              Handle appendix, Handle method_type) {
   assert(is_secondary_entry(), "");
-  set_method_handle_common(cpool, Bytecodes::_invokedynamic, adapter, appendix);
+  set_method_handle_common(cpool, Bytecodes::_invokedynamic, adapter, appendix, method_type);
 }
 
 void ConstantPoolCacheEntry::set_method_handle_common(constantPoolHandle cpool,
                                                       Bytecodes::Code invoke_code,
                                                       methodHandle adapter,
-                                                      Handle appendix) {
+                                                      Handle appendix, Handle method_type) {
   // NOTE: This CPCE can be the subject of data races.
   // There are three words to update: flags, f2, f1 (in that order).
   // Writers must store all other values before f1.
@@ -296,23 +298,28 @@
     return;
   }
 
-  bool has_appendix = appendix.not_null();
+  const bool has_appendix    = appendix.not_null();
+  const bool has_method_type = method_type.not_null();
+
   if (!has_appendix) {
     // The extra argument is not used, but we need a non-null value to signify linkage state.
     // Set it to something benign that will never leak memory.
     appendix = Universe::void_mirror();
   }
 
+  // Write the flags.
   set_method_flags(as_TosState(adapter->result_type()),
-                   ((has_appendix ?  1 : 0) << has_appendix_shift) |
-                   (                 1      << is_vfinal_shift)    |
-                   (                 1      << is_final_shift),
+                   ((has_appendix    ? 1 : 0) << has_appendix_shift)    |
+                   ((has_method_type ? 1 : 0) << has_method_type_shift) |
+                   (                   1      << is_vfinal_shift)       |
+                   (                   1      << is_final_shift),
                    adapter->size_of_parameters());
 
   if (TraceInvokeDynamic) {
-    tty->print_cr("set_method_handle bc=%d appendix="PTR_FORMAT"%s method="PTR_FORMAT" ",
+    tty->print_cr("set_method_handle bc=%d appendix="PTR_FORMAT"%s method_type="PTR_FORMAT"%s method="PTR_FORMAT" ",
                   invoke_code,
-                  (intptr_t)appendix(), (has_appendix ? "" : " (unused)"),
+                  (intptr_t)appendix(),    (has_appendix    ? "" : " (unused)"),
+                  (intptr_t)method_type(), (has_method_type ? "" : " (unused)"),
                   (intptr_t)adapter());
     adapter->print();
     if (has_appendix)  appendix()->print();
@@ -336,14 +343,31 @@
   // The fact that String and List are involved is encoded in the MethodType in f1.
   // This allows us to create fewer method oops, while keeping type safety.
   //
+
   set_f2_as_vfinal_method(adapter());
+
+  // Store MethodType, if any.
+  if (has_method_type) {
+    ConstantPoolCacheEntry* e2 = cpool->cache()->find_secondary_entry_for(this);
+
+    // Write the flags.
+    e2->set_method_flags(as_TosState(adapter->result_type()),
+                     ((has_method_type ? 1 : 0) << has_method_type_shift) |
+                     (                   1      << is_vfinal_shift)       |
+                     (                   1      << is_final_shift),
+                     adapter->size_of_parameters());
+    e2->release_set_f1(method_type());
+  }
+
   assert(appendix.not_null(), "needed for linkage state");
   release_set_f1(appendix());  // This must be the last one to set (see NOTE above)!
+
   if (!is_secondary_entry()) {
     // The interpreter assembly code does not check byte_2,
     // but it is used by is_resolved, method_if_resolved, etc.
     set_bytecode_2(invoke_code);
   }
+
   NOT_PRODUCT(verify(tty));
   if (TraceInvokeDynamic) {
     this->print(tty, 0);
@@ -401,6 +425,20 @@
 }
 
 
+oop ConstantPoolCacheEntry::appendix_if_resolved(constantPoolHandle cpool) {
+  if (is_f1_null() || !has_appendix())
+    return NULL;
+  return f1_appendix();
+}
+
+
+oop ConstantPoolCacheEntry::method_type_if_resolved(constantPoolHandle cpool) {
+  if (is_f1_null() || !has_method_type())
+    return NULL;
+  return f1_as_instance();
+}
+
+
 class LocalOopClosure: public OopClosure {
  private:
   void (*_f)(oop*);
diff -r 38ae397aa523 -r a66016d23db1 src/share/vm/oops/cpCacheOop.hpp
--- openjdk/hotspot/src/share/vm/oops/cpCacheOop.hpp	Thu Feb 06 14:33:44 2014 +0000
+++ openjdk/hotspot/src/share/vm/oops/cpCacheOop.hpp	Fri Feb 07 21:17:40 2014 +0000
@@ -167,10 +167,11 @@
     tos_state_mask             = right_n_bits(tos_state_bits),
     tos_state_shift            = BitsPerInt - tos_state_bits,  // see verify_tos_state_shift below
     // misc. option bits; can be any bit position in [16..27]
-    is_vfinal_shift            = 21,
-    is_volatile_shift          = 22,
-    is_final_shift             = 23,
-    has_appendix_shift         = 24,
+    is_vfinal_shift            = 20,
+    is_volatile_shift          = 21,
+    is_final_shift             = 22,
+    has_appendix_shift         = 23,
+    has_method_type_shift      = 24,
     is_forced_virtual_shift    = 25,
     is_field_entry_shift       = 26,
     // low order bits give field index (for FieldInfo) or method parameter size:
@@ -224,13 +225,15 @@
   void set_method_handle(
     constantPoolHandle cpool,                    // holding constant pool (required for locking)
     methodHandle method,                         // adapter for invokeExact, etc.
-    Handle appendix                              // stored in f1; could be a java.lang.invoke.MethodType
+    Handle appendix,                             // stored in f1; could be a java.lang.invoke.MethodType
+    Handle method_type                           // stored in f1 (of secondary entry); is a java.lang.invoke.MethodType
   );
 
   void set_dynamic_call(
     constantPoolHandle cpool,                    // holding constant pool (required for locking)
     methodHandle method,                         // adapter for this call site
-    Handle appendix                              // stored in f1; could be a java.lang.invoke.CallSite
+    Handle appendix,                             // stored in f1; could be a java.lang.invoke.CallSite
+    Handle method_type                           // stored in f1 (of secondary entry); is a java.lang.invoke.MethodType
   );
 
   // Common code for invokedynamic and MH invocations.
@@ -252,10 +255,13 @@
     constantPoolHandle cpool,                    // holding constant pool (required for locking)
     Bytecodes::Code invoke_code,                 // _invokehandle or _invokedynamic
     methodHandle adapter,                        // invoker method (f2)
-    Handle appendix                              // appendix such as CallSite, MethodType, etc. (f1)
+    Handle appendix,                             // appendix such as CallSite, MethodType, etc. (f1)
+    Handle method_type                           // MethodType (f1 of secondary entry)
   );
 
-  methodOop method_if_resolved(constantPoolHandle cpool);
+  methodOop      method_if_resolved(constantPoolHandle cpool);
+  oop          appendix_if_resolved(constantPoolHandle cpool);
+  oop       method_type_if_resolved(constantPoolHandle cpool);
 
   void set_parameter_size(int value);
 
@@ -267,11 +273,11 @@
       case Bytecodes::_getfield        :    // fall through
       case Bytecodes::_invokespecial   :    // fall through
       case Bytecodes::_invokestatic    :    // fall through
+      case Bytecodes::_invokehandle    :    // fall through
+      case Bytecodes::_invokedynamic   :    // fall through
       case Bytecodes::_invokeinterface : return 1;
       case Bytecodes::_putstatic       :    // fall through
       case Bytecodes::_putfield        :    // fall through
-      case Bytecodes::_invokehandle    :    // fall through
-      case Bytecodes::_invokedynamic   :    // fall through
       case Bytecodes::_invokevirtual   : return 2;
       default                          : break;
     }
@@ -310,7 +316,8 @@
   int  parameter_size() const                    { assert(is_method_entry(), ""); return (_flags & parameter_size_mask); }
   bool is_volatile() const                       { return (_flags & (1 << is_volatile_shift))       != 0; }
   bool is_final() const                          { return (_flags & (1 << is_final_shift))          != 0; }
-  bool has_appendix() const                      { return (_flags & (1 << has_appendix_shift))     != 0; }
+  bool has_appendix() const                      { return (_flags & (1 << has_appendix_shift))      != 0; }
+  bool has_method_type() const                   { return (_flags & (1 << has_method_type_shift))   != 0; }
   bool is_forced_virtual() const                 { return (_flags & (1 << is_forced_virtual_shift)) != 0; }
   bool is_vfinal() const                         { return (_flags & (1 << is_vfinal_shift))         != 0; }
   bool is_method_entry() const                   { return (_flags & (1 << is_field_entry_shift))    == 0; }
@@ -446,6 +453,29 @@
     return entry_at(primary_index);
   }
 
+  int index_of(ConstantPoolCacheEntry* e) {
+    assert(base() <= e && e < base() + length(), "oob");
+    int cpc_index = (e - base());
+    assert(entry_at(cpc_index) == e, "sanity");
+    return cpc_index;
+  }
+  ConstantPoolCacheEntry* find_secondary_entry_for(ConstantPoolCacheEntry* e) {
+    const int cpc_index = index_of(e);
+    if (e->is_secondary_entry()) {
+      ConstantPoolCacheEntry* e2 = entry_at(cpc_index + 1);
+      assert(e->main_entry_index() == e2->main_entry_index(), "");
+      return e2;
+    } else {
+      for (int i = length() - 1; i >= 0; i--) {
+        ConstantPoolCacheEntry* e2 = entry_at(i);
+        if (cpc_index == e2->main_entry_index())
+          return e2;
+      }
+    }
+    fatal("no secondary entry found");
+    return NULL;
+  }
+
   // Code generation
   static ByteSize base_offset()                  { return in_ByteSize(sizeof(constantPoolCacheOopDesc)); }
   static ByteSize entry_offset(int raw_index) {