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::move(int from_offset, int to_offset) {
65 __ movl(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
66 __ movl(Address(to(), to_offset * wordSize), temp());
67 }
68
69
70 void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {
71 __ lea(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
72 __ cmpptr(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), NULL_WORD); // do not use temp() to avoid AGI
73 Label L;
74 __ jcc(Assembler::notZero, L);
75 __ movptr(temp(), NULL_WORD);
76 __ bind(L);
77 __ movptr(Address(to(), to_offset * wordSize), temp());
78 }
79
80
81 void InterpreterRuntime::SignatureHandlerGenerator::generate( uint64_t fingerprint) {
82 // generate code to handle arguments
83 iterate(fingerprint);
84 // return result handler
85 __ lea(rax,
86 ExternalAddress((address)Interpreter::result_handler(method()->result_type())));
87 // return
88 __ ret(0);
89 __ flush();
90 }
91
92
93 Register InterpreterRuntime::SignatureHandlerGenerator::from() { return rdi; }
94 Register InterpreterRuntime::SignatureHandlerGenerator::to() { return rsp; }
95 Register InterpreterRuntime::SignatureHandlerGenerator::temp() { return rcx; }
96
97
98 // Implementation of SignatureHandlerLibrary
99
100 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
101
102 class SlowSignatureHandler: public NativeSignatureIterator {
103 private:
104 address _from;
105 intptr_t* _to;
106
107 virtual void pass_int() {
108 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
109 _from -= Interpreter::stackElementSize;
110 }
111
112 virtual void pass_float() {
113 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
114 _from -= Interpreter::stackElementSize;
115 }
116
117 virtual void pass_long() {
118 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
119 _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
120 _to += 2;
121 _from -= 2*Interpreter::stackElementSize;
122 }
123
124 virtual void pass_object() {
125 // pass address of from
126 intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
127 *_to++ = (*(intptr_t*)from_addr == 0) ? NULL_WORD : from_addr;
128 _from -= Interpreter::stackElementSize;
129 }
130
131 public:
132 SlowSignatureHandler(const methodHandle& method, address from, intptr_t* to) :
133 NativeSignatureIterator(method) {
134 _from = from;
135 _to = to + (is_static() ? 2 : 1);
136 }
137 };
138
139 JRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* current, Method* method, intptr_t* from, intptr_t* to))
140 methodHandle m(current, (Method*)method);
141 assert(m->is_native(), "sanity check");
142 // handle arguments
143 SlowSignatureHandler(m, (address)from, to + 1).iterate((uint64_t)CONST64(-1));
144 // return result handler
145 return Interpreter::result_handler(m->result_type());
146 JRT_END