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 #ifdef AMD64
46 #ifdef _WIN64
47 _num_args = (method->is_static() ? 1 : 0);
48 _stack_offset = (Argument::n_int_register_parameters_c+1)* wordSize; // don't overwrite return address
49 #else
50 _num_int_args = (method->is_static() ? 1 : 0);
51 _num_fp_args = 0;
52 _stack_offset = wordSize; // don't overwrite return address
53 #endif // _WIN64
54 #endif // AMD64
55 }
56
57 void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
58 move(offset(), jni_offset() + 1);
59 }
60
61 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
62 move(offset(), jni_offset() + 1);
63 }
64
65 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
66 move(offset(), jni_offset() + 2);
67 move(offset() + 1, jni_offset() + 1);
68 }
69
70 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
71 box (offset(), jni_offset() + 1);
72 }
73
74 void InterpreterRuntime::SignatureHandlerGenerator::pass_valuetype() {
75 box (offset(), jni_offset() + 1);
76 }
77
78 void InterpreterRuntime::SignatureHandlerGenerator::move(int from_offset, int to_offset) {
79 __ movl(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
80 __ movl(Address(to(), to_offset * wordSize), temp());
81 }
82
83
84 void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {
85 __ lea(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
86 __ cmpptr(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), NULL_WORD); // do not use temp() to avoid AGI
87 Label L;
88 __ jcc(Assembler::notZero, L);
89 __ movptr(temp(), NULL_WORD);
90 __ bind(L);
91 __ movptr(Address(to(), to_offset * wordSize), temp());
92 }
93
94
95 void InterpreterRuntime::SignatureHandlerGenerator::generate( uint64_t fingerprint) {
96 // generate code to handle arguments
97 iterate(fingerprint);
98 // return result handler
99 __ lea(rax,
100 ExternalAddress((address)Interpreter::result_handler(method()->result_type())));
101 // return
102 __ ret(0);
103 __ flush();
104 }
105
106
107 Register InterpreterRuntime::SignatureHandlerGenerator::from() { return rdi; }
108 Register InterpreterRuntime::SignatureHandlerGenerator::to() { return rsp; }
109 Register InterpreterRuntime::SignatureHandlerGenerator::temp() { return rcx; }
110
111
112 // Implementation of SignatureHandlerLibrary
113
114 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
115
116 class SlowSignatureHandler: public NativeSignatureIterator {
117 private:
118 address _from;
119 intptr_t* _to;
120
121 virtual void pass_int() {
122 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
123 _from -= Interpreter::stackElementSize;
124 }
125
126 virtual void pass_float() {
127 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
128 _from -= Interpreter::stackElementSize;
129 }
130
131 virtual void pass_long() {
132 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
133 _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
134 _to += 2;
135 _from -= 2*Interpreter::stackElementSize;
136 }
137
138 virtual void pass_object() {
139 // pass address of from
140 intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
141 *_to++ = (*(intptr_t*)from_addr == 0) ? NULL_WORD : from_addr;
142 _from -= Interpreter::stackElementSize;
143 }
144
145 virtual void pass_valuetype() {
146 // pass address of from
147 intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
148 *_to++ = (*(intptr_t*)from_addr == 0) ? NULL_WORD : from_addr;
149 _from -= Interpreter::stackElementSize;
150 }
151
152 public:
153 SlowSignatureHandler(const methodHandle& method, address from, intptr_t* to) :
154 NativeSignatureIterator(method) {
155 _from = from;
156 _to = to + (is_static() ? 2 : 1);
157 }
158 };
159
160 JRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* current, Method* method, intptr_t* from, intptr_t* to))
161 methodHandle m(current, (Method*)method);
162 assert(m->is_native(), "sanity check");
163 // handle arguments
164 SlowSignatureHandler(m, (address)from, to + 1).iterate((uint64_t)CONST64(-1));
165 // return result handler
166 return Interpreter::result_handler(m->result_type());
167 JRT_END