1 /*
2 * Copyright (c) 1998, 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 #include "precompiled.hpp"
26 #include "interpreter/interp_masm.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "memory/allocation.inline.hpp"
30 #include "oops/method.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "runtime/handles.inline.hpp"
33 #include "runtime/icache.hpp"
34 #include "runtime/interfaceSupport.inline.hpp"
35 #include "runtime/signature.hpp"
36
37
38 #define __ _masm->
39
40
41 // Implementation of SignatureHandlerGenerator
42 InterpreterRuntime::SignatureHandlerGenerator::SignatureHandlerGenerator(const methodHandle& method, CodeBuffer* buffer) :
43 NativeSignatureIterator(method) {
44 _masm = new MacroAssembler(buffer);
45 }
46
47 void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
48 move(offset(), jni_offset() + 1);
49 }
50
51 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
52 move(offset(), jni_offset() + 1);
53 }
54
55 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
56 move(offset(), jni_offset() + 2);
57 move(offset() + 1, jni_offset() + 1);
58 }
59
60 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
61 box (offset(), jni_offset() + 1);
62 }
63
64 void InterpreterRuntime::SignatureHandlerGenerator::pass_valuetype() {
65 box (offset(), jni_offset() + 1);
66 }
67
68 void InterpreterRuntime::SignatureHandlerGenerator::move(int from_offset, int to_offset) {
69 __ movl(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
70 __ movl(Address(to(), to_offset * wordSize), temp());
71 }
72
73
74 void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {
75 __ lea(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
76 __ cmpptr(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), NULL_WORD); // do not use temp() to avoid AGI
77 Label L;
78 __ jcc(Assembler::notZero, L);
79 __ movptr(temp(), NULL_WORD);
80 __ bind(L);
81 __ movptr(Address(to(), to_offset * wordSize), temp());
82 }
83
84
85 void InterpreterRuntime::SignatureHandlerGenerator::generate( uint64_t fingerprint) {
86 // generate code to handle arguments
87 iterate(fingerprint);
88 // return result handler
89 __ lea(rax,
90 ExternalAddress((address)Interpreter::result_handler(method()->result_type())));
91 // return
92 __ ret(0);
93 __ flush();
94 }
95
96
97 Register InterpreterRuntime::SignatureHandlerGenerator::from() { return rdi; }
98 Register InterpreterRuntime::SignatureHandlerGenerator::to() { return rsp; }
99 Register InterpreterRuntime::SignatureHandlerGenerator::temp() { return rcx; }
100
101
102 // Implementation of SignatureHandlerLibrary
103
104 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
105
106 class SlowSignatureHandler: public NativeSignatureIterator {
107 private:
108 address _from;
109 intptr_t* _to;
110
111 virtual void pass_int() {
112 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
113 _from -= Interpreter::stackElementSize;
114 }
115
116 virtual void pass_float() {
117 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
118 _from -= Interpreter::stackElementSize;
119 }
120
121 virtual void pass_long() {
122 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
123 _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
124 _to += 2;
125 _from -= 2*Interpreter::stackElementSize;
126 }
127
128 virtual void pass_object() {
129 // pass address of from
130 intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
131 *_to++ = (*(intptr_t*)from_addr == 0) ? NULL_WORD : from_addr;
132 _from -= Interpreter::stackElementSize;
133 }
134
135 virtual void pass_valuetype() {
136 // pass address of from
137 intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
138 *_to++ = (*(intptr_t*)from_addr == 0) ? NULL_WORD : from_addr;
139 _from -= Interpreter::stackElementSize;
140 }
141
142 public:
143 SlowSignatureHandler(const methodHandle& method, address from, intptr_t* to) :
144 NativeSignatureIterator(method) {
145 _from = from;
146 _to = to + (is_static() ? 2 : 1);
147 }
148 };
149
150 JRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* current, Method* method, intptr_t* from, intptr_t* to))
151 methodHandle m(current, (Method*)method);
152 assert(m->is_native(), "sanity check");
153 // handle arguments
154 SlowSignatureHandler(m, (address)from, to + 1).iterate((uint64_t)CONST64(-1));
155 // return result handler
156 return Interpreter::result_handler(m->result_type());
157 JRT_END