accessFlags.hpp revision 3602:da91efe96a93
1/* 2 * Copyright (c) 1997, 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#ifndef SHARE_VM_UTILITIES_ACCESSFLAGS_HPP 26#define SHARE_VM_UTILITIES_ACCESSFLAGS_HPP 27 28#include "prims/jvm.h" 29#include "utilities/top.hpp" 30 31// AccessFlags is an abstraction over Java access flags. 32 33 34enum { 35 // See jvm.h for shared JVM_ACC_XXX access flags 36 37 // HotSpot-specific access flags 38 39 // flags actually put in .class file 40 JVM_ACC_WRITTEN_FLAGS = 0x00007FFF, 41 42 // Method* flags 43 JVM_ACC_MONITOR_MATCH = 0x10000000, // True if we know that monitorenter/monitorexit bytecodes match 44 JVM_ACC_HAS_MONITOR_BYTECODES = 0x20000000, // Method contains monitorenter/monitorexit bytecodes 45 JVM_ACC_HAS_LOOPS = 0x40000000, // Method has loops 46 JVM_ACC_LOOPS_FLAG_INIT = (int)0x80000000,// The loop flag has been initialized 47 JVM_ACC_QUEUED = 0x01000000, // Queued for compilation 48 JVM_ACC_NOT_C2_COMPILABLE = 0x02000000, 49 JVM_ACC_NOT_C1_COMPILABLE = 0x04000000, 50 JVM_ACC_NOT_OSR_COMPILABLE = 0x08000000, 51 JVM_ACC_HAS_LINE_NUMBER_TABLE = 0x00100000, 52 JVM_ACC_HAS_CHECKED_EXCEPTIONS = 0x00400000, 53 JVM_ACC_HAS_JSRS = 0x00800000, 54 JVM_ACC_IS_OLD = 0x00010000, // RedefineClasses() has replaced this method 55 JVM_ACC_IS_OBSOLETE = 0x00020000, // RedefineClasses() has made method obsolete 56 JVM_ACC_IS_PREFIXED_NATIVE = 0x00040000, // JVMTI has prefixed this native method 57 JVM_ACC_ON_STACK = 0x00080000, // RedefinedClasses() is used on the stack 58 59 // Klass* flags 60 JVM_ACC_HAS_MIRANDA_METHODS = 0x10000000, // True if this class has miranda methods in it's vtable 61 JVM_ACC_HAS_VANILLA_CONSTRUCTOR = 0x20000000, // True if klass has a vanilla default constructor 62 JVM_ACC_HAS_FINALIZER = 0x40000000, // True if klass has a non-empty finalize() method 63 JVM_ACC_IS_CLONEABLE = (int)0x80000000,// True if klass supports the Clonable interface 64 JVM_ACC_HAS_FINAL_METHOD = 0x01000000, // True if klass has final method 65 66 // Klass* and Method* flags 67 JVM_ACC_HAS_LOCAL_VARIABLE_TABLE= 0x00200000, 68 69 JVM_ACC_PROMOTED_FLAGS = 0x00200000, // flags promoted from methods to the holding klass 70 71 // field flags 72 // Note: these flags must be defined in the low order 16 bits because 73 // InstanceKlass only stores a ushort worth of information from the 74 // AccessFlags value. 75 // These bits must not conflict with any other field-related access flags 76 // (e.g., ACC_ENUM). 77 // Note that the class-related ACC_ANNOTATION bit conflicts with these flags. 78 JVM_ACC_FIELD_ACCESS_WATCHED = 0x00002000, // field access is watched by JVMTI 79 JVM_ACC_FIELD_MODIFICATION_WATCHED = 0x00008000, // field modification is watched by JVMTI 80 JVM_ACC_FIELD_INTERNAL = 0x00000400, // internal field, same as JVM_ACC_ABSTRACT 81 JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE = 0x00000800, // field has generic signature 82 83 JVM_ACC_FIELD_INTERNAL_FLAGS = JVM_ACC_FIELD_ACCESS_WATCHED | 84 JVM_ACC_FIELD_MODIFICATION_WATCHED | 85 JVM_ACC_FIELD_INTERNAL | 86 JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE, 87 88 // flags accepted by set_field_flags() 89 JVM_ACC_FIELD_FLAGS = JVM_RECOGNIZED_FIELD_MODIFIERS | JVM_ACC_FIELD_INTERNAL_FLAGS 90 91}; 92 93 94class AccessFlags VALUE_OBJ_CLASS_SPEC { 95 friend class VMStructs; 96 private: 97 jint _flags; 98 99 public: 100 // Java access flags 101 bool is_public () const { return (_flags & JVM_ACC_PUBLIC ) != 0; } 102 bool is_private () const { return (_flags & JVM_ACC_PRIVATE ) != 0; } 103 bool is_protected () const { return (_flags & JVM_ACC_PROTECTED ) != 0; } 104 bool is_static () const { return (_flags & JVM_ACC_STATIC ) != 0; } 105 bool is_final () const { return (_flags & JVM_ACC_FINAL ) != 0; } 106 bool is_synchronized() const { return (_flags & JVM_ACC_SYNCHRONIZED) != 0; } 107 bool is_super () const { return (_flags & JVM_ACC_SUPER ) != 0; } 108 bool is_volatile () const { return (_flags & JVM_ACC_VOLATILE ) != 0; } 109 bool is_transient () const { return (_flags & JVM_ACC_TRANSIENT ) != 0; } 110 bool is_native () const { return (_flags & JVM_ACC_NATIVE ) != 0; } 111 bool is_interface () const { return (_flags & JVM_ACC_INTERFACE ) != 0; } 112 bool is_abstract () const { return (_flags & JVM_ACC_ABSTRACT ) != 0; } 113 bool is_strict () const { return (_flags & JVM_ACC_STRICT ) != 0; } 114 115 // Attribute flags 116 bool is_synthetic () const { return (_flags & JVM_ACC_SYNTHETIC ) != 0; } 117 118 // Method* flags 119 bool is_monitor_matching () const { return (_flags & JVM_ACC_MONITOR_MATCH ) != 0; } 120 bool has_monitor_bytecodes () const { return (_flags & JVM_ACC_HAS_MONITOR_BYTECODES ) != 0; } 121 bool has_loops () const { return (_flags & JVM_ACC_HAS_LOOPS ) != 0; } 122 bool loops_flag_init () const { return (_flags & JVM_ACC_LOOPS_FLAG_INIT ) != 0; } 123 bool queued_for_compilation () const { return (_flags & JVM_ACC_QUEUED ) != 0; } 124 bool is_not_c1_compilable () const { return (_flags & JVM_ACC_NOT_C1_COMPILABLE ) != 0; } 125 bool is_not_c2_compilable () const { return (_flags & JVM_ACC_NOT_C2_COMPILABLE ) != 0; } 126 bool is_not_osr_compilable () const { return (_flags & JVM_ACC_NOT_OSR_COMPILABLE ) != 0; } 127 bool has_linenumber_table () const { return (_flags & JVM_ACC_HAS_LINE_NUMBER_TABLE ) != 0; } 128 bool has_checked_exceptions () const { return (_flags & JVM_ACC_HAS_CHECKED_EXCEPTIONS ) != 0; } 129 bool has_jsrs () const { return (_flags & JVM_ACC_HAS_JSRS ) != 0; } 130 bool is_old () const { return (_flags & JVM_ACC_IS_OLD ) != 0; } 131 bool is_obsolete () const { return (_flags & JVM_ACC_IS_OBSOLETE ) != 0; } 132 bool is_prefixed_native () const { return (_flags & JVM_ACC_IS_PREFIXED_NATIVE ) != 0; } 133 134 // Klass* flags 135 bool has_miranda_methods () const { return (_flags & JVM_ACC_HAS_MIRANDA_METHODS ) != 0; } 136 bool has_vanilla_constructor () const { return (_flags & JVM_ACC_HAS_VANILLA_CONSTRUCTOR) != 0; } 137 bool has_finalizer () const { return (_flags & JVM_ACC_HAS_FINALIZER ) != 0; } 138 bool has_final_method () const { return (_flags & JVM_ACC_HAS_FINAL_METHOD ) != 0; } 139 bool is_cloneable () const { return (_flags & JVM_ACC_IS_CLONEABLE ) != 0; } 140 // Klass* and Method* flags 141 bool has_localvariable_table () const { return (_flags & JVM_ACC_HAS_LOCAL_VARIABLE_TABLE) != 0; } 142 void set_has_localvariable_table() { atomic_set_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); } 143 void clear_has_localvariable_table() { atomic_clear_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); } 144 145 // field flags 146 bool is_field_access_watched() const { return (_flags & JVM_ACC_FIELD_ACCESS_WATCHED) != 0; } 147 bool is_field_modification_watched() const 148 { return (_flags & JVM_ACC_FIELD_MODIFICATION_WATCHED) != 0; } 149 bool on_stack() const { return (_flags & JVM_ACC_ON_STACK) != 0; } 150 bool is_internal() const { return (_flags & JVM_ACC_FIELD_INTERNAL) != 0; } 151 bool field_has_generic_signature() const 152 { return (_flags & JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE) != 0; } 153 154 // get .class file flags 155 jint get_flags () const { return (_flags & JVM_ACC_WRITTEN_FLAGS); } 156 157 // Initialization 158 void add_promoted_flags(jint flags) { _flags |= (flags & JVM_ACC_PROMOTED_FLAGS); } 159 void set_field_flags(jint flags) { 160 assert((flags & JVM_ACC_FIELD_FLAGS) == flags, "only recognized flags"); 161 _flags = (flags & JVM_ACC_FIELD_FLAGS); 162 } 163 void set_flags(jint flags) { _flags = (flags & JVM_ACC_WRITTEN_FLAGS); } 164 165 void set_queued_for_compilation() { atomic_set_bits(JVM_ACC_QUEUED); } 166 void clear_queued_for_compilation() { atomic_clear_bits(JVM_ACC_QUEUED); } 167 168 // Atomic update of flags 169 void atomic_set_bits(jint bits); 170 void atomic_clear_bits(jint bits); 171 172 private: 173 friend class Method; 174 friend class Klass; 175 friend class ClassFileParser; 176 // the functions below should only be called on the _access_flags inst var directly, 177 // otherwise they are just changing a copy of the flags 178 179 // attribute flags 180 void set_is_synthetic() { atomic_set_bits(JVM_ACC_SYNTHETIC); } 181 182 // Method* flags 183 void set_monitor_matching() { atomic_set_bits(JVM_ACC_MONITOR_MATCH); } 184 void set_has_monitor_bytecodes() { atomic_set_bits(JVM_ACC_HAS_MONITOR_BYTECODES); } 185 void set_has_loops() { atomic_set_bits(JVM_ACC_HAS_LOOPS); } 186 void set_loops_flag_init() { atomic_set_bits(JVM_ACC_LOOPS_FLAG_INIT); } 187 void set_not_c1_compilable() { atomic_set_bits(JVM_ACC_NOT_C1_COMPILABLE); } 188 void set_not_c2_compilable() { atomic_set_bits(JVM_ACC_NOT_C2_COMPILABLE); } 189 void set_not_osr_compilable() { atomic_set_bits(JVM_ACC_NOT_OSR_COMPILABLE); } 190 void set_has_linenumber_table() { atomic_set_bits(JVM_ACC_HAS_LINE_NUMBER_TABLE); } 191 void set_has_checked_exceptions() { atomic_set_bits(JVM_ACC_HAS_CHECKED_EXCEPTIONS); } 192 void set_has_jsrs() { atomic_set_bits(JVM_ACC_HAS_JSRS); } 193 void set_is_old() { atomic_set_bits(JVM_ACC_IS_OLD); } 194 void set_is_obsolete() { atomic_set_bits(JVM_ACC_IS_OBSOLETE); } 195 void set_is_prefixed_native() { atomic_set_bits(JVM_ACC_IS_PREFIXED_NATIVE); } 196 197 // Klass* flags 198 void set_has_vanilla_constructor() { atomic_set_bits(JVM_ACC_HAS_VANILLA_CONSTRUCTOR); } 199 void set_has_finalizer() { atomic_set_bits(JVM_ACC_HAS_FINALIZER); } 200 void set_has_final_method() { atomic_set_bits(JVM_ACC_HAS_FINAL_METHOD); } 201 void set_is_cloneable() { atomic_set_bits(JVM_ACC_IS_CLONEABLE); } 202 void set_has_miranda_methods() { atomic_set_bits(JVM_ACC_HAS_MIRANDA_METHODS); } 203 204 public: 205 // field flags 206 void set_is_field_access_watched(const bool value) 207 { 208 if (value) { 209 atomic_set_bits(JVM_ACC_FIELD_ACCESS_WATCHED); 210 } else { 211 atomic_clear_bits(JVM_ACC_FIELD_ACCESS_WATCHED); 212 } 213 } 214 void set_is_field_modification_watched(const bool value) 215 { 216 if (value) { 217 atomic_set_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED); 218 } else { 219 atomic_clear_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED); 220 } 221 } 222 void set_field_has_generic_signature() 223 { 224 atomic_set_bits(JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE); 225 } 226 227 void set_on_stack(const bool value) 228 { 229 if (value) { 230 atomic_set_bits(JVM_ACC_ON_STACK); 231 } else { 232 atomic_clear_bits(JVM_ACC_ON_STACK); 233 } 234 } 235 // Conversion 236 jshort as_short() const { return (jshort)_flags; } 237 jint as_int() const { return _flags; } 238 239 inline friend AccessFlags accessFlags_from(jint flags); 240 241 // Printing/debugging 242 void print_on(outputStream* st) const PRODUCT_RETURN; 243}; 244 245inline AccessFlags accessFlags_from(jint flags) { 246 AccessFlags af; 247 af._flags = flags; 248 return af; 249} 250 251#endif // SHARE_VM_UTILITIES_ACCESSFLAGS_HPP 252