1 /*
   2  * Copyright (c) 2011, 2017, 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 // Platform-specific definitions for method handles.
  26 // These definitions are inlined into class MethodHandles.
  27 
  28 // Adapters
  29 enum /* platform_dependent_constants */ {
  30   adapter_code_size = 35000 DEBUG_ONLY(+ 50000)
  31 };
  32 
  33 // Additional helper methods for MethodHandles code generation:
  34 public:
  35   static void load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg);
  36 
  37   static void verify_klass(MacroAssembler* _masm,
  38                            Register obj_reg, SystemDictionary::WKID klass_id,
  39                            Register temp_reg, Register temp2_reg,
  40                            const char* error_message = "wrong klass") NOT_DEBUG_RETURN;
  41 
  42   static void verify_method_handle(MacroAssembler* _masm, Register mh_reg,
  43                                    Register temp_reg, Register temp2_reg) {
  44     verify_klass(_masm, mh_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_invoke_MethodHandle),
  45                  temp_reg, temp2_reg,
  46                  "reference is a MH");
  47   }
  48 
  49   static void verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) NOT_DEBUG_RETURN;
  50 
  51   // Similar to InterpreterMacroAssembler::jump_from_interpreted.
  52   // Takes care of special dispatch from single stepping too.
  53   static void jump_from_method_handle(MacroAssembler* _masm, Register method,
  54                                       Register temp, Register temp2,
  55                                       bool for_compiler_entry);
  56 
  57   static void jump_to_lambda_form(MacroAssembler* _masm,
  58                                   Register recv, Register method_temp,
  59                                   Register temp2, Register temp3,
  60                                   bool for_compiler_entry);