1 /*
 2  * Copyright (c) 2010, 2021, 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 = 4000 DEBUG_ONLY(+ 6000)
31 };
32 
33 // Additional helper methods for MethodHandles code generation:
34 public:
35   static void load_klass_from_Class(MacroAssembler* _masm, Register klass_reg);
36 
37   static void verify_klass(MacroAssembler* _masm,
38                            Register obj, vmClassID klass_id,
39                            const char* error_message = "wrong klass") NOT_DEBUG_RETURN;
40 
41   static void verify_method_handle(MacroAssembler* _masm, Register mh_reg) {
42     verify_klass(_masm, mh_reg, VM_CLASS_ID(MethodHandle_klass),
43                  "reference is a MH");
44   }
45 
46   static void verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) NOT_DEBUG_RETURN;
47 
48   // Similar to InterpreterMacroAssembler::jump_from_interpreted.
49   // Takes care of special dispatch from single stepping too.
50   static void jump_from_method_handle(MacroAssembler* _masm, Register method, Register temp,
51                                       bool for_compiler_entry);
52 
53   static void jump_to_lambda_form(MacroAssembler* _masm,
54                                   Register recv, Register method_temp,
55                                   Register temp2,
56                                   bool for_compiler_entry);
57 
58   static Register saved_last_sp_register() {
59     // Should be in sharedRuntime, not here.
60     return LP64_ONLY(r13) NOT_LP64(rsi);
61   }