1 /*
2 * Copyright (c) 1998, 2012, 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/interpreter.hpp"
27 #include "interpreter/interpreterRuntime.hpp"
28 #include "memory/allocation.inline.hpp"
29 #include "memory/universe.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.hpp"
35 #include "runtime/signature.hpp"
36
37
38 #define __ _masm->
39
40
41 // Implementation of SignatureHandlerGenerator
42 void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
43 move(offset(), jni_offset() + 1);
44 }
45
46 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
47 move(offset(), jni_offset() + 1);
48 }
49
50 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
51 move(offset(), jni_offset() + 2);
52 move(offset() + 1, jni_offset() + 1);
53 }
54
55 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
56 box (offset(), jni_offset() + 1);
57 }
58
59 void InterpreterRuntime::SignatureHandlerGenerator::pass_valuetype() {
60 box (offset(), jni_offset() + 1);
61 }
62
63 void InterpreterRuntime::SignatureHandlerGenerator::move(int from_offset, int to_offset) {
64 __ movl(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
65 __ movl(Address(to(), to_offset * wordSize), temp());
66 }
67
68
69 void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {
70 __ lea(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
71 __ cmpptr(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), (int32_t)NULL_WORD); // do not use temp() to avoid AGI
72 Label L;
73 __ jcc(Assembler::notZero, L);
74 __ movptr(temp(), NULL_WORD);
75 __ bind(L);
76 __ movptr(Address(to(), to_offset * wordSize), temp());
77 }
78
79
80 void InterpreterRuntime::SignatureHandlerGenerator::generate( uint64_t fingerprint) {
81 // generate code to handle arguments
82 iterate(fingerprint);
83 // return result handler
84 __ lea(rax,
85 ExternalAddress((address)Interpreter::result_handler(method()->result_type())));
86 // return
87 __ ret(0);
88 __ flush();
89 }
90
91
92 Register InterpreterRuntime::SignatureHandlerGenerator::from() { return rdi; }
93 Register InterpreterRuntime::SignatureHandlerGenerator::to() { return rsp; }
94 Register InterpreterRuntime::SignatureHandlerGenerator::temp() { return rcx; }
95
96
97 // Implementation of SignatureHandlerLibrary
98
99 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
100
101 class SlowSignatureHandler: public NativeSignatureIterator {
102 private:
103 address _from;
104 intptr_t* _to;
105
106 virtual void pass_int() {
107 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
108 _from -= Interpreter::stackElementSize;
109 }
110
111 virtual void pass_float() {
112 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
113 _from -= Interpreter::stackElementSize;
114 }
115
116 virtual void pass_long() {
117 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
118 _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
119 _to += 2;
120 _from -= 2*Interpreter::stackElementSize;
121 }
122
123 virtual void pass_object() {
124 // pass address of from
125 intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
126 *_to++ = (*(intptr_t*)from_addr == 0) ? NULL_WORD : from_addr;
127 _from -= Interpreter::stackElementSize;
128 }
129
130 virtual void pass_valuetype() {
131 // pass address of from
132 intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
133 *_to++ = (*(intptr_t*)from_addr == 0) ? NULL_WORD : from_addr;
134 _from -= Interpreter::stackElementSize;
135 }
136
137 public:
138 SlowSignatureHandler(methodHandle method, address from, intptr_t* to) :
139 NativeSignatureIterator(method) {
140 _from = from;
141 _to = to + (is_static() ? 2 : 1);
142 }
143 };
144
145 IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* thread, Method* method, intptr_t* from, intptr_t* to))
146 methodHandle m(thread, (Method*)method);
147 assert(m->is_native(), "sanity check");
148 // handle arguments
149 SlowSignatureHandler(m, (address)from, to + 1).iterate((uint64_t)CONST64(-1));
150 // return result handler
151 return Interpreter::result_handler(m->result_type());
152 IRT_END