1 /*
2 * Copyright (c) 1998, 2018, 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 "memory/universe.hpp"
31 #include "oops/method.hpp"
32 #include "oops/oop.inline.hpp"
33 #include "runtime/handles.inline.hpp"
34 #include "runtime/icache.hpp"
35 #include "runtime/interfaceSupport.inline.hpp"
36 #include "runtime/signature.hpp"
37
38
39 #define __ _masm->
40
41
42 // Implementation of SignatureHandlerGenerator
43 InterpreterRuntime::SignatureHandlerGenerator::SignatureHandlerGenerator(const methodHandle& method, CodeBuffer* buffer) :
44 NativeSignatureIterator(method) {
45 _masm = new MacroAssembler(buffer);
46 #ifdef AMD64
47 #ifdef _WIN64
48 _num_args = (method->is_static() ? 1 : 0);
49 _stack_offset = (Argument::n_int_register_parameters_c+1)* wordSize; // don't overwrite return address
50 #else
51 _num_int_args = (method->is_static() ? 1 : 0);
52 _num_fp_args = 0;
53 _stack_offset = wordSize; // don't overwrite return address
54 #endif // _WIN64
55 #endif // AMD64
56 }
57
58 void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
59 move(offset(), jni_offset() + 1);
60 }
61
62 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
63 move(offset(), jni_offset() + 1);
64 }
65
66 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
67 move(offset(), jni_offset() + 2);
68 move(offset() + 1, jni_offset() + 1);
69 }
70
71 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
72 box (offset(), jni_offset() + 1);
73 }
74
75 void InterpreterRuntime::SignatureHandlerGenerator::move(int from_offset, int to_offset) {
76 __ movl(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
77 __ movl(Address(to(), to_offset * wordSize), temp());
78 }
79
80
81 void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {
82 __ lea(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
83 __ cmpptr(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), (int32_t)NULL_WORD); // do not use temp() to avoid AGI
84 Label L;
85 __ jcc(Assembler::notZero, L);
86 __ movptr(temp(), NULL_WORD);
87 __ bind(L);
88 __ movptr(Address(to(), to_offset * wordSize), temp());
89 }
90
91
92 void InterpreterRuntime::SignatureHandlerGenerator::generate( uint64_t fingerprint) {
93 // generate code to handle arguments
94 iterate(fingerprint);
95 // return result handler
96 __ lea(rax,
97 ExternalAddress((address)Interpreter::result_handler(method()->result_type())));
98 // return
99 __ ret(0);
100 __ flush();
101 }
102
103
104 Register InterpreterRuntime::SignatureHandlerGenerator::from() { return rdi; }
105 Register InterpreterRuntime::SignatureHandlerGenerator::to() { return rsp; }
106 Register InterpreterRuntime::SignatureHandlerGenerator::temp() { return rcx; }
107
108
109 // Implementation of SignatureHandlerLibrary
110
111 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
112
113 class SlowSignatureHandler: public NativeSignatureIterator {
114 private:
115 address _from;
116 intptr_t* _to;
117
118 virtual void pass_int() {
119 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
120 _from -= Interpreter::stackElementSize;
121 }
122
123 virtual void pass_float() {
124 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
125 _from -= Interpreter::stackElementSize;
126 }
127
128 virtual void pass_long() {
129 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
130 _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
131 _to += 2;
132 _from -= 2*Interpreter::stackElementSize;
133 }
134
135 virtual void pass_object() {
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 IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* thread, Method* method, intptr_t* from, intptr_t* to))
151 methodHandle m(thread, (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 IRT_END