1 /*
2 * Copyright (c) 1998, 2019, 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
SignatureHandlerGenerator(const methodHandle & method,CodeBuffer * buffer)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
pass_int()57 void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
58 move(offset(), jni_offset() + 1);
59 }
60
pass_float()61 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
62 move(offset(), jni_offset() + 1);
63 }
64
pass_long()65 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
66 move(offset(), jni_offset() + 2);
67 move(offset() + 1, jni_offset() + 1);
68 }
69
pass_object()70 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
71 box (offset(), jni_offset() + 1);
72 }
73
move(int from_offset,int to_offset)74 void InterpreterRuntime::SignatureHandlerGenerator::move(int from_offset, int to_offset) {
75 __ movl(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
76 __ movl(Address(to(), to_offset * wordSize), temp());
77 }
78
79
box(int from_offset,int to_offset)80 void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {
81 __ lea(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
82 __ cmpptr(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), (int32_t)NULL_WORD); // do not use temp() to avoid AGI
83 Label L;
84 __ jcc(Assembler::notZero, L);
85 __ movptr(temp(), NULL_WORD);
86 __ bind(L);
87 __ movptr(Address(to(), to_offset * wordSize), temp());
88 }
89
90
generate(uint64_t fingerprint)91 void InterpreterRuntime::SignatureHandlerGenerator::generate( uint64_t fingerprint) {
92 // generate code to handle arguments
93 iterate(fingerprint);
94 // return result handler
95 __ lea(rax,
96 ExternalAddress((address)Interpreter::result_handler(method()->result_type())));
97 // return
98 __ ret(0);
99 __ flush();
100 }
101
102
from()103 Register InterpreterRuntime::SignatureHandlerGenerator::from() { return rdi; }
to()104 Register InterpreterRuntime::SignatureHandlerGenerator::to() { return rsp; }
temp()105 Register InterpreterRuntime::SignatureHandlerGenerator::temp() { return rcx; }
106
107
108 // Implementation of SignatureHandlerLibrary
109
pd_set_handler(address handler)110 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
111
112 class SlowSignatureHandler: public NativeSignatureIterator {
113 private:
114 address _from;
115 intptr_t* _to;
116
pass_int()117 virtual void pass_int() {
118 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
119 _from -= Interpreter::stackElementSize;
120 }
121
pass_float()122 virtual void pass_float() {
123 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
124 _from -= Interpreter::stackElementSize;
125 }
126
pass_long()127 virtual void pass_long() {
128 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
129 _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
130 _to += 2;
131 _from -= 2*Interpreter::stackElementSize;
132 }
133
pass_object()134 virtual void pass_object() {
135 // pass address of from
136 intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
137 *_to++ = (*(intptr_t*)from_addr == 0) ? NULL_WORD : from_addr;
138 _from -= Interpreter::stackElementSize;
139 }
140
141 public:
SlowSignatureHandler(const methodHandle & method,address from,intptr_t * to)142 SlowSignatureHandler(const methodHandle& method, address from, intptr_t* to) :
143 NativeSignatureIterator(method) {
144 _from = from;
145 _to = to + (is_static() ? 2 : 1);
146 }
147 };
148
149 JRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* thread, Method* method, intptr_t* from, intptr_t* to))
150 methodHandle m(thread, (Method*)method);
151 assert(m->is_native(), "sanity check");
152 // handle arguments
153 SlowSignatureHandler(m, (address)from, to + 1).iterate((uint64_t)CONST64(-1));
154 // return result handler
155 return Interpreter::result_handler(m->result_type());
156 JRT_END
157