1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2016 SAP SE. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 // Platform-specific definitions for method handles.
  27 // These definitions are inlined into class MethodHandles.
  28 
  29   // Adapters
  30   enum /* platform_dependent_constants */ {
  31     adapter_code_size = NOT_LP64(23000 DEBUG_ONLY(+ 40000)) LP64_ONLY(35000 DEBUG_ONLY(+ 50000))
  32   };
  33 
  34   // Additional helper methods for MethodHandles code generation:
  35  public:
  36   static void load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg);
  37 
  38   static void verify_klass(MacroAssembler* _masm,
  39                            Register obj_reg, SystemDictionary::WKID klass_id,
  40                            Register temp_reg, Register temp2_reg,
  41                            const char* error_message = "wrong klass") NOT_DEBUG_RETURN;
  42 
  43   static void verify_method_handle(MacroAssembler* _masm, Register mh_reg,
  44                                    Register temp_reg, Register temp2_reg) {
  45     verify_klass(_masm, mh_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_invoke_MethodHandle),
  46                  temp_reg, temp2_reg,
  47                  "reference is a MH");
  48   }
  49 
  50   static void verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) NOT_DEBUG_RETURN;
  51 
  52   // Similar to InterpreterMacroAssembler::jump_from_interpreted.
  53   // Takes care of special dispatch from single stepping too.
  54   static void jump_from_method_handle(MacroAssembler* _masm, Register method,
  55                                       Register temp, Register temp2,
  56                                       bool for_compiler_entry);
  57 
  58   static void jump_to_lambda_form(MacroAssembler* _masm,
  59                                   Register recv, Register method_temp,
  60                                   Register temp2, Register temp3,
  61                                   bool for_compiler_entry);