1 /*
 2  * Copyright (c) 2016, 2021, 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, vmClassID 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, VM_CLASS_ID(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);