1 /*
   2  * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_CI_CIMETHODHANDLE_HPP
  26 #define SHARE_VM_CI_CIMETHODHANDLE_HPP
  27 
  28 #include "ci/ciCallProfile.hpp"
  29 #include "ci/ciInstance.hpp"
  30 #include "prims/methodHandles.hpp"
  31 
  32 // ciMethodHandle
  33 //
  34 // The class represents a java.lang.invoke.MethodHandle object.
  35 class ciMethodHandle : public ciInstance {
  36 private:
  37   ciMethod*      _callee;
  38   ciMethod*      _caller;
  39   ciCallProfile  _profile;
  40   ciMethod*      _method_handle_adapter;
  41   ciMethod*      _invokedynamic_adapter;
  42 
  43   // Return an adapter for this MethodHandle.
  44   ciMethod* get_adapter_impl(bool is_invokedynamic);
  45   ciMethod* get_adapter(     bool is_invokedynamic);
  46 
  47 protected:
  48   void print_chain_impl(outputStream* st) PRODUCT_RETURN;
  49 
  50 public:
  51   ciMethodHandle(instanceHandle h_i) :
  52     ciInstance(h_i),
  53     _callee(NULL),
  54     _caller(NULL),
  55     _method_handle_adapter(NULL),
  56     _invokedynamic_adapter(NULL)
  57   {}
  58 
  59   // What kind of ciObject is this?
  60   bool is_method_handle() const { return true; }
  61 
  62   void set_callee(ciMethod* m)                  { _callee  = m;       }
  63   void set_caller(ciMethod* m)                  { _caller  = m;       }
  64   void set_call_profile(ciCallProfile profile)  { _profile = profile; }
  65 
  66   // Return an adapter for a MethodHandle call.
  67   ciMethod* get_method_handle_adapter() {
  68     if (_method_handle_adapter == NULL) {
  69       _method_handle_adapter = get_adapter(false);
  70     }
  71     return _method_handle_adapter;
  72   }
  73 
  74   // Return an adapter for an invokedynamic call.
  75   ciMethod* get_invokedynamic_adapter() {
  76     if (_invokedynamic_adapter == NULL) {
  77       _invokedynamic_adapter = get_adapter(true);
  78     }
  79     return _invokedynamic_adapter;
  80   }
  81 
  82   void print_chain(outputStream* st = tty) PRODUCT_RETURN;
  83 };
  84 
  85 #endif // SHARE_VM_CI_CIMETHODHANDLE_HPP