0
|
1 /*
|
|
2 * Copyright 1997-2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
20 * CA 95054 USA or visit www.sun.com if you need additional information or
|
|
21 * have any questions.
|
|
22 *
|
|
23 */
|
|
24
|
|
25 #include "incls/_precompiled.incl"
|
|
26 #include "incls/_bytecode.cpp.incl"
|
|
27
|
|
28 // Implementation of Bytecode
|
|
29 // Should eventually get rid of these functions and use ThisRelativeObj methods instead
|
|
30
|
|
31 void Bytecode::set_code(Bytecodes::Code code) {
|
|
32 Bytecodes::check(code);
|
|
33 *addr_at(0) = u_char(code);
|
|
34 }
|
|
35
|
|
36
|
|
37 void Bytecode::set_fast_index(int i) {
|
|
38 assert(0 <= i && i < 0x10000, "illegal index value");
|
|
39 Bytes::put_native_u2(addr_at(1), (jushort)i);
|
|
40 }
|
|
41
|
|
42
|
|
43 bool Bytecode::check_must_rewrite() const {
|
|
44 assert(Bytecodes::can_rewrite(code()), "post-check only");
|
|
45
|
|
46 // Some codes are conditionally rewriting. Look closely at them.
|
|
47 switch (code()) {
|
|
48 case Bytecodes::_aload_0:
|
|
49 // Even if RewriteFrequentPairs is turned on,
|
|
50 // the _aload_0 code might delay its rewrite until
|
|
51 // a following _getfield rewrites itself.
|
|
52 return false;
|
|
53
|
|
54 case Bytecodes::_lookupswitch:
|
|
55 return false; // the rewrite is not done by the interpreter
|
|
56
|
|
57 case Bytecodes::_new:
|
|
58 // (Could actually look at the class here, but the profit would be small.)
|
|
59 return false; // the rewrite is not always done
|
|
60 }
|
|
61
|
|
62 // No other special cases.
|
|
63 return true;
|
|
64 }
|
|
65
|
|
66
|
|
67
|
|
68 // Implementation of Bytecode_tableupswitch
|
|
69
|
|
70 int Bytecode_tableswitch::dest_offset_at(int i) const {
|
|
71 address x = aligned_addr_at(1);
|
|
72 int x2 = aligned_offset(1 + (3 + i)*jintSize);
|
|
73 int val = java_signed_word_at(x2);
|
|
74 return java_signed_word_at(aligned_offset(1 + (3 + i)*jintSize));
|
|
75 }
|
|
76
|
|
77
|
|
78 // Implementation of Bytecode_invoke
|
|
79
|
|
80 void Bytecode_invoke::verify() const {
|
|
81 Bytecodes::Code bc = adjusted_invoke_code();
|
|
82 assert(is_valid(), "check invoke");
|
|
83 }
|
|
84
|
|
85
|
|
86 symbolOop Bytecode_invoke::signature() const {
|
|
87 constantPoolOop constants = method()->constants();
|
|
88 return constants->signature_ref_at(index());
|
|
89 }
|
|
90
|
|
91
|
|
92 symbolOop Bytecode_invoke::name() const {
|
|
93 constantPoolOop constants = method()->constants();
|
|
94 return constants->name_ref_at(index());
|
|
95 }
|
|
96
|
|
97
|
|
98 BasicType Bytecode_invoke::result_type(Thread *thread) const {
|
|
99 symbolHandle sh(thread, signature());
|
|
100 ResultTypeFinder rts(sh);
|
|
101 rts.iterate();
|
|
102 return rts.type();
|
|
103 }
|
|
104
|
|
105
|
|
106 methodHandle Bytecode_invoke::static_target(TRAPS) {
|
|
107 methodHandle m;
|
|
108 KlassHandle resolved_klass;
|
|
109 constantPoolHandle constants(THREAD, _method->constants());
|
|
110
|
|
111 if (adjusted_invoke_code() != Bytecodes::_invokeinterface) {
|
|
112 LinkResolver::resolve_method(m, resolved_klass, constants, index(), CHECK_(methodHandle()));
|
|
113 } else {
|
|
114 LinkResolver::resolve_interface_method(m, resolved_klass, constants, index(), CHECK_(methodHandle()));
|
|
115 }
|
|
116 return m;
|
|
117 }
|
|
118
|
|
119
|
|
120 int Bytecode_invoke::index() const {
|
|
121 return Bytes::get_Java_u2(bcp() + 1);
|
|
122 }
|
|
123
|
|
124
|
|
125 // Implementation of Bytecode_static
|
|
126
|
|
127 void Bytecode_static::verify() const {
|
|
128 assert(Bytecodes::java_code(code()) == Bytecodes::_putstatic
|
|
129 || Bytecodes::java_code(code()) == Bytecodes::_getstatic, "check static");
|
|
130 }
|
|
131
|
|
132
|
|
133 BasicType Bytecode_static::result_type(methodOop method) const {
|
|
134 int index = java_hwrd_at(1);
|
|
135 constantPoolOop constants = method->constants();
|
|
136 symbolOop field_type = constants->signature_ref_at(index);
|
|
137 BasicType basic_type = FieldType::basic_type(field_type);
|
|
138 return basic_type;
|
|
139 }
|
|
140
|
|
141
|
|
142 // Implementation of Bytecode_field
|
|
143
|
|
144 void Bytecode_field::verify() const {
|
|
145 Bytecodes::Code stdc = Bytecodes::java_code(code());
|
|
146 assert(stdc == Bytecodes::_putstatic || stdc == Bytecodes::_getstatic ||
|
|
147 stdc == Bytecodes::_putfield || stdc == Bytecodes::_getfield, "check field");
|
|
148 }
|
|
149
|
|
150
|
|
151 bool Bytecode_field::is_static() const {
|
|
152 Bytecodes::Code stdc = Bytecodes::java_code(code());
|
|
153 return stdc == Bytecodes::_putstatic || stdc == Bytecodes::_getstatic;
|
|
154 }
|
|
155
|
|
156
|
|
157 int Bytecode_field::index() const {
|
|
158 return java_hwrd_at(1);
|
|
159 }
|
|
160
|
|
161
|
|
162 // Implementation of Bytecodes loac constant
|
|
163
|
|
164 int Bytecode_loadconstant::index() const {
|
|
165 Bytecodes::Code stdc = Bytecodes::java_code(code());
|
|
166 return stdc == Bytecodes::_ldc ? java_byte_at(1) : java_hwrd_at(1);
|
|
167 }
|
|
168
|
|
169 //------------------------------------------------------------------------------
|
|
170 // Non-product code
|
|
171
|
|
172 #ifndef PRODUCT
|
|
173
|
|
174 void Bytecode_lookupswitch::verify() const {
|
|
175 switch (Bytecodes::java_code(code())) {
|
|
176 case Bytecodes::_lookupswitch:
|
|
177 { int i = number_of_pairs() - 1;
|
|
178 while (i-- > 0) {
|
|
179 assert(pair_at(i)->match() < pair_at(i+1)->match(), "unsorted table entries");
|
|
180 }
|
|
181 }
|
|
182 break;
|
|
183 default:
|
|
184 fatal("not a lookupswitch bytecode");
|
|
185 }
|
|
186 }
|
|
187
|
|
188 void Bytecode_tableswitch::verify() const {
|
|
189 switch (Bytecodes::java_code(code())) {
|
|
190 case Bytecodes::_tableswitch:
|
|
191 { int lo = low_key();
|
|
192 int hi = high_key();
|
|
193 assert (hi >= lo, "incorrect hi/lo values in tableswitch");
|
|
194 int i = hi - lo - 1 ;
|
|
195 while (i-- > 0) {
|
|
196 // no special check needed
|
|
197 }
|
|
198 }
|
|
199 break;
|
|
200 default:
|
|
201 fatal("not a tableswitch bytecode");
|
|
202 }
|
|
203 }
|
|
204
|
|
205 #endif
|