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comparison src/share/vm/utilities/accessFlags.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2007 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 // AccessFlags is an abstraction over Java access flags.
26
27
28 enum {
29 // See jvm.h for shared JVM_ACC_XXX access flags
30
31 // HotSpot-specific access flags
32
33 // flags actually put in .class file
34 JVM_ACC_WRITTEN_FLAGS = 0x00007FFF,
35
36 // methodOop flags
37 JVM_ACC_MONITOR_MATCH = 0x10000000, // True if we know that monitorenter/monitorexit bytecodes match
38 JVM_ACC_HAS_MONITOR_BYTECODES = 0x20000000, // Method contains monitorenter/monitorexit bytecodes
39 JVM_ACC_HAS_LOOPS = 0x40000000, // Method has loops
40 JVM_ACC_LOOPS_FLAG_INIT = (int)0x80000000,// The loop flag has been initialized
41 JVM_ACC_QUEUED = 0x01000000, // Queued for compilation
42 JVM_ACC_NOT_TIER1_COMPILABLE = 0x04000000,
43 JVM_ACC_NOT_OSR_COMPILABLE = 0x08000000,
44 JVM_ACC_HAS_LINE_NUMBER_TABLE = 0x00100000,
45 JVM_ACC_HAS_CHECKED_EXCEPTIONS = 0x00400000,
46 JVM_ACC_HAS_JSRS = 0x00800000,
47 JVM_ACC_IS_OLD = 0x00010000, // RedefineClasses() has replaced this method
48 JVM_ACC_IS_OBSOLETE = 0x00020000, // RedefineClasses() has made method obsolete
49 JVM_ACC_IS_PREFIXED_NATIVE = 0x00040000, // JVMTI has prefixed this native method
50
51 // klassOop flags
52 JVM_ACC_HAS_MIRANDA_METHODS = 0x10000000, // True if this class has miranda methods in it's vtable
53 JVM_ACC_HAS_VANILLA_CONSTRUCTOR = 0x20000000, // True if klass has a vanilla default constructor
54 JVM_ACC_HAS_FINALIZER = 0x40000000, // True if klass has a non-empty finalize() method
55 JVM_ACC_IS_CLONEABLE = (int)0x80000000,// True if klass supports the Clonable interface
56 JVM_ACC_HAS_FINAL_METHOD = 0x01000000, // True if klass has final method
57
58 // klassOop and methodOop flags
59 JVM_ACC_HAS_LOCAL_VARIABLE_TABLE= 0x00200000,
60
61 JVM_ACC_PROMOTED_FLAGS = 0x00200000, // flags promoted from methods to the holding klass
62
63 // field flags
64 // Note: these flags must be defined in the low order 16 bits because
65 // instanceKlass only stores a ushort worth of information from the
66 // AccessFlags value.
67 // These bits must not conflict with any other field-related access flags
68 // (e.g., ACC_ENUM).
69 // Note that the class-related ACC_ANNOTATION bit conflicts with these flags.
70 JVM_ACC_FIELD_ACCESS_WATCHED = 0x00002000, // field access is watched by JVMTI
71 JVM_ACC_FIELD_MODIFICATION_WATCHED = 0x00008000, // field modification is watched by JVMTI
72
73 // flags accepted by set_field_flags()
74 JVM_ACC_FIELD_FLAGS = 0x00008000 | JVM_ACC_WRITTEN_FLAGS
75 };
76
77
78 class AccessFlags VALUE_OBJ_CLASS_SPEC {
79 friend class VMStructs;
80 private:
81 jint _flags;
82
83 public:
84 // Java access flags
85 bool is_public () const { return (_flags & JVM_ACC_PUBLIC ) != 0; }
86 bool is_private () const { return (_flags & JVM_ACC_PRIVATE ) != 0; }
87 bool is_protected () const { return (_flags & JVM_ACC_PROTECTED ) != 0; }
88 bool is_static () const { return (_flags & JVM_ACC_STATIC ) != 0; }
89 bool is_final () const { return (_flags & JVM_ACC_FINAL ) != 0; }
90 bool is_synchronized() const { return (_flags & JVM_ACC_SYNCHRONIZED) != 0; }
91 bool is_super () const { return (_flags & JVM_ACC_SUPER ) != 0; }
92 bool is_volatile () const { return (_flags & JVM_ACC_VOLATILE ) != 0; }
93 bool is_transient () const { return (_flags & JVM_ACC_TRANSIENT ) != 0; }
94 bool is_native () const { return (_flags & JVM_ACC_NATIVE ) != 0; }
95 bool is_interface () const { return (_flags & JVM_ACC_INTERFACE ) != 0; }
96 bool is_abstract () const { return (_flags & JVM_ACC_ABSTRACT ) != 0; }
97 bool is_strict () const { return (_flags & JVM_ACC_STRICT ) != 0; }
98
99 // Attribute flags
100 bool is_synthetic () const { return (_flags & JVM_ACC_SYNTHETIC ) != 0; }
101
102 // methodOop flags
103 bool is_monitor_matching () const { return (_flags & JVM_ACC_MONITOR_MATCH ) != 0; }
104 bool has_monitor_bytecodes () const { return (_flags & JVM_ACC_HAS_MONITOR_BYTECODES ) != 0; }
105 bool has_loops () const { return (_flags & JVM_ACC_HAS_LOOPS ) != 0; }
106 bool loops_flag_init () const { return (_flags & JVM_ACC_LOOPS_FLAG_INIT ) != 0; }
107 bool queued_for_compilation () const { return (_flags & JVM_ACC_QUEUED ) != 0; }
108 bool is_not_tier1_compilable () const { return (_flags & JVM_ACC_NOT_TIER1_COMPILABLE ) != 0; }
109 bool is_not_osr_compilable () const { return (_flags & JVM_ACC_NOT_OSR_COMPILABLE ) != 0; }
110 bool has_linenumber_table () const { return (_flags & JVM_ACC_HAS_LINE_NUMBER_TABLE ) != 0; }
111 bool has_checked_exceptions () const { return (_flags & JVM_ACC_HAS_CHECKED_EXCEPTIONS ) != 0; }
112 bool has_jsrs () const { return (_flags & JVM_ACC_HAS_JSRS ) != 0; }
113 bool is_old () const { return (_flags & JVM_ACC_IS_OLD ) != 0; }
114 bool is_obsolete () const { return (_flags & JVM_ACC_IS_OBSOLETE ) != 0; }
115 bool is_prefixed_native () const { return (_flags & JVM_ACC_IS_PREFIXED_NATIVE ) != 0; }
116
117 // klassOop flags
118 bool has_miranda_methods () const { return (_flags & JVM_ACC_HAS_MIRANDA_METHODS ) != 0; }
119 bool has_vanilla_constructor () const { return (_flags & JVM_ACC_HAS_VANILLA_CONSTRUCTOR) != 0; }
120 bool has_finalizer () const { return (_flags & JVM_ACC_HAS_FINALIZER ) != 0; }
121 bool has_final_method () const { return (_flags & JVM_ACC_HAS_FINAL_METHOD ) != 0; }
122 bool is_cloneable () const { return (_flags & JVM_ACC_IS_CLONEABLE ) != 0; }
123 // klassOop and methodOop flags
124 bool has_localvariable_table () const { return (_flags & JVM_ACC_HAS_LOCAL_VARIABLE_TABLE) != 0; }
125 void set_has_localvariable_table() { atomic_set_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); }
126 void clear_has_localvariable_table() { atomic_clear_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); }
127
128 // field flags
129 bool is_field_access_watched() const { return (_flags & JVM_ACC_FIELD_ACCESS_WATCHED) != 0; }
130 bool is_field_modification_watched() const
131 { return (_flags & JVM_ACC_FIELD_MODIFICATION_WATCHED) != 0; }
132
133 // get .class file flags
134 jint get_flags () const { return (_flags & JVM_ACC_WRITTEN_FLAGS); }
135
136 // Initialization
137 void add_promoted_flags(jint flags) { _flags |= (flags & JVM_ACC_PROMOTED_FLAGS); }
138 void set_field_flags(jint flags) { _flags = (flags & JVM_ACC_FIELD_FLAGS); }
139 void set_flags(jint flags) { _flags = (flags & JVM_ACC_WRITTEN_FLAGS); }
140
141 void set_queued_for_compilation() { atomic_set_bits(JVM_ACC_QUEUED); }
142 void clear_queued_for_compilation() { atomic_clear_bits(JVM_ACC_QUEUED); }
143
144 // Atomic update of flags
145 void atomic_set_bits(jint bits);
146 void atomic_clear_bits(jint bits);
147
148 private:
149 friend class methodOopDesc;
150 friend class Klass;
151 friend class ClassFileParser;
152 // the functions below should only be called on the _access_flags inst var directly,
153 // otherwise they are just changing a copy of the flags
154
155 // attribute flags
156 void set_is_synthetic() { atomic_set_bits(JVM_ACC_SYNTHETIC); }
157
158 // methodOop flags
159 void set_monitor_matching() { atomic_set_bits(JVM_ACC_MONITOR_MATCH); }
160 void set_has_monitor_bytecodes() { atomic_set_bits(JVM_ACC_HAS_MONITOR_BYTECODES); }
161 void set_has_loops() { atomic_set_bits(JVM_ACC_HAS_LOOPS); }
162 void set_loops_flag_init() { atomic_set_bits(JVM_ACC_LOOPS_FLAG_INIT); }
163 void set_not_tier1_compilable() { atomic_set_bits(JVM_ACC_NOT_TIER1_COMPILABLE); }
164 void set_not_osr_compilable() { atomic_set_bits(JVM_ACC_NOT_OSR_COMPILABLE); }
165 void set_has_linenumber_table() { atomic_set_bits(JVM_ACC_HAS_LINE_NUMBER_TABLE); }
166 void set_has_checked_exceptions() { atomic_set_bits(JVM_ACC_HAS_CHECKED_EXCEPTIONS); }
167 void set_has_jsrs() { atomic_set_bits(JVM_ACC_HAS_JSRS); }
168 void set_is_old() { atomic_set_bits(JVM_ACC_IS_OLD); }
169 void set_is_obsolete() { atomic_set_bits(JVM_ACC_IS_OBSOLETE); }
170 void set_is_prefixed_native() { atomic_set_bits(JVM_ACC_IS_PREFIXED_NATIVE); }
171
172 // klassOop flags
173 void set_has_vanilla_constructor() { atomic_set_bits(JVM_ACC_HAS_VANILLA_CONSTRUCTOR); }
174 void set_has_finalizer() { atomic_set_bits(JVM_ACC_HAS_FINALIZER); }
175 void set_has_final_method() { atomic_set_bits(JVM_ACC_HAS_FINAL_METHOD); }
176 void set_is_cloneable() { atomic_set_bits(JVM_ACC_IS_CLONEABLE); }
177 void set_has_miranda_methods() { atomic_set_bits(JVM_ACC_HAS_MIRANDA_METHODS); }
178
179 public:
180 // field flags
181 void set_is_field_access_watched(const bool value)
182 {
183 if (value) {
184 atomic_set_bits(JVM_ACC_FIELD_ACCESS_WATCHED);
185 } else {
186 atomic_clear_bits(JVM_ACC_FIELD_ACCESS_WATCHED);
187 }
188 }
189 void set_is_field_modification_watched(const bool value)
190 {
191 if (value) {
192 atomic_set_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED);
193 } else {
194 atomic_clear_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED);
195 }
196 }
197
198 // Conversion
199 jshort as_short() { return (jshort)_flags; }
200 jint as_int() { return _flags; }
201
202 // Printing/debugging
203 void print_on(outputStream* st) const PRODUCT_RETURN;
204 };