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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // AccessFlags is an abstraction over Java access flags.
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26
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27
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28 enum {
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29 // See jvm.h for shared JVM_ACC_XXX access flags
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30
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31 // HotSpot-specific access flags
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32
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33 // flags actually put in .class file
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34 JVM_ACC_WRITTEN_FLAGS = 0x00007FFF,
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35
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36 // methodOop flags
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37 JVM_ACC_MONITOR_MATCH = 0x10000000, // True if we know that monitorenter/monitorexit bytecodes match
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38 JVM_ACC_HAS_MONITOR_BYTECODES = 0x20000000, // Method contains monitorenter/monitorexit bytecodes
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39 JVM_ACC_HAS_LOOPS = 0x40000000, // Method has loops
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40 JVM_ACC_LOOPS_FLAG_INIT = (int)0x80000000,// The loop flag has been initialized
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41 JVM_ACC_QUEUED = 0x01000000, // Queued for compilation
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42 JVM_ACC_NOT_TIER1_COMPILABLE = 0x04000000,
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43 JVM_ACC_NOT_OSR_COMPILABLE = 0x08000000,
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44 JVM_ACC_HAS_LINE_NUMBER_TABLE = 0x00100000,
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45 JVM_ACC_HAS_CHECKED_EXCEPTIONS = 0x00400000,
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46 JVM_ACC_HAS_JSRS = 0x00800000,
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47 JVM_ACC_IS_OLD = 0x00010000, // RedefineClasses() has replaced this method
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48 JVM_ACC_IS_OBSOLETE = 0x00020000, // RedefineClasses() has made method obsolete
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49 JVM_ACC_IS_PREFIXED_NATIVE = 0x00040000, // JVMTI has prefixed this native method
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50
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51 // klassOop flags
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52 JVM_ACC_HAS_MIRANDA_METHODS = 0x10000000, // True if this class has miranda methods in it's vtable
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53 JVM_ACC_HAS_VANILLA_CONSTRUCTOR = 0x20000000, // True if klass has a vanilla default constructor
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54 JVM_ACC_HAS_FINALIZER = 0x40000000, // True if klass has a non-empty finalize() method
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55 JVM_ACC_IS_CLONEABLE = (int)0x80000000,// True if klass supports the Clonable interface
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56 JVM_ACC_HAS_FINAL_METHOD = 0x01000000, // True if klass has final method
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57
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58 // klassOop and methodOop flags
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59 JVM_ACC_HAS_LOCAL_VARIABLE_TABLE= 0x00200000,
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60
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61 JVM_ACC_PROMOTED_FLAGS = 0x00200000, // flags promoted from methods to the holding klass
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62
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63 // field flags
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64 // Note: these flags must be defined in the low order 16 bits because
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65 // instanceKlass only stores a ushort worth of information from the
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66 // AccessFlags value.
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67 // These bits must not conflict with any other field-related access flags
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68 // (e.g., ACC_ENUM).
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69 // Note that the class-related ACC_ANNOTATION bit conflicts with these flags.
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70 JVM_ACC_FIELD_ACCESS_WATCHED = 0x00002000, // field access is watched by JVMTI
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71 JVM_ACC_FIELD_MODIFICATION_WATCHED = 0x00008000, // field modification is watched by JVMTI
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72
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73 // flags accepted by set_field_flags()
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74 JVM_ACC_FIELD_FLAGS = 0x00008000 | JVM_ACC_WRITTEN_FLAGS
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75 };
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76
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77
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78 class AccessFlags VALUE_OBJ_CLASS_SPEC {
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79 friend class VMStructs;
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80 private:
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81 jint _flags;
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82
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83 public:
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84 // Java access flags
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85 bool is_public () const { return (_flags & JVM_ACC_PUBLIC ) != 0; }
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86 bool is_private () const { return (_flags & JVM_ACC_PRIVATE ) != 0; }
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87 bool is_protected () const { return (_flags & JVM_ACC_PROTECTED ) != 0; }
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88 bool is_static () const { return (_flags & JVM_ACC_STATIC ) != 0; }
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89 bool is_final () const { return (_flags & JVM_ACC_FINAL ) != 0; }
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90 bool is_synchronized() const { return (_flags & JVM_ACC_SYNCHRONIZED) != 0; }
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91 bool is_super () const { return (_flags & JVM_ACC_SUPER ) != 0; }
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92 bool is_volatile () const { return (_flags & JVM_ACC_VOLATILE ) != 0; }
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93 bool is_transient () const { return (_flags & JVM_ACC_TRANSIENT ) != 0; }
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94 bool is_native () const { return (_flags & JVM_ACC_NATIVE ) != 0; }
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95 bool is_interface () const { return (_flags & JVM_ACC_INTERFACE ) != 0; }
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96 bool is_abstract () const { return (_flags & JVM_ACC_ABSTRACT ) != 0; }
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97 bool is_strict () const { return (_flags & JVM_ACC_STRICT ) != 0; }
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98
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99 // Attribute flags
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100 bool is_synthetic () const { return (_flags & JVM_ACC_SYNTHETIC ) != 0; }
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101
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102 // methodOop flags
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103 bool is_monitor_matching () const { return (_flags & JVM_ACC_MONITOR_MATCH ) != 0; }
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104 bool has_monitor_bytecodes () const { return (_flags & JVM_ACC_HAS_MONITOR_BYTECODES ) != 0; }
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105 bool has_loops () const { return (_flags & JVM_ACC_HAS_LOOPS ) != 0; }
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106 bool loops_flag_init () const { return (_flags & JVM_ACC_LOOPS_FLAG_INIT ) != 0; }
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107 bool queued_for_compilation () const { return (_flags & JVM_ACC_QUEUED ) != 0; }
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108 bool is_not_tier1_compilable () const { return (_flags & JVM_ACC_NOT_TIER1_COMPILABLE ) != 0; }
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109 bool is_not_osr_compilable () const { return (_flags & JVM_ACC_NOT_OSR_COMPILABLE ) != 0; }
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110 bool has_linenumber_table () const { return (_flags & JVM_ACC_HAS_LINE_NUMBER_TABLE ) != 0; }
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111 bool has_checked_exceptions () const { return (_flags & JVM_ACC_HAS_CHECKED_EXCEPTIONS ) != 0; }
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112 bool has_jsrs () const { return (_flags & JVM_ACC_HAS_JSRS ) != 0; }
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113 bool is_old () const { return (_flags & JVM_ACC_IS_OLD ) != 0; }
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114 bool is_obsolete () const { return (_flags & JVM_ACC_IS_OBSOLETE ) != 0; }
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115 bool is_prefixed_native () const { return (_flags & JVM_ACC_IS_PREFIXED_NATIVE ) != 0; }
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116
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117 // klassOop flags
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118 bool has_miranda_methods () const { return (_flags & JVM_ACC_HAS_MIRANDA_METHODS ) != 0; }
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119 bool has_vanilla_constructor () const { return (_flags & JVM_ACC_HAS_VANILLA_CONSTRUCTOR) != 0; }
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120 bool has_finalizer () const { return (_flags & JVM_ACC_HAS_FINALIZER ) != 0; }
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121 bool has_final_method () const { return (_flags & JVM_ACC_HAS_FINAL_METHOD ) != 0; }
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122 bool is_cloneable () const { return (_flags & JVM_ACC_IS_CLONEABLE ) != 0; }
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123 // klassOop and methodOop flags
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124 bool has_localvariable_table () const { return (_flags & JVM_ACC_HAS_LOCAL_VARIABLE_TABLE) != 0; }
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125 void set_has_localvariable_table() { atomic_set_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); }
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126 void clear_has_localvariable_table() { atomic_clear_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); }
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127
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128 // field flags
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129 bool is_field_access_watched() const { return (_flags & JVM_ACC_FIELD_ACCESS_WATCHED) != 0; }
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130 bool is_field_modification_watched() const
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131 { return (_flags & JVM_ACC_FIELD_MODIFICATION_WATCHED) != 0; }
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132
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133 // get .class file flags
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134 jint get_flags () const { return (_flags & JVM_ACC_WRITTEN_FLAGS); }
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135
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136 // Initialization
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137 void add_promoted_flags(jint flags) { _flags |= (flags & JVM_ACC_PROMOTED_FLAGS); }
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138 void set_field_flags(jint flags) { _flags = (flags & JVM_ACC_FIELD_FLAGS); }
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139 void set_flags(jint flags) { _flags = (flags & JVM_ACC_WRITTEN_FLAGS); }
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140
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141 void set_queued_for_compilation() { atomic_set_bits(JVM_ACC_QUEUED); }
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142 void clear_queued_for_compilation() { atomic_clear_bits(JVM_ACC_QUEUED); }
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143
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144 // Atomic update of flags
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145 void atomic_set_bits(jint bits);
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146 void atomic_clear_bits(jint bits);
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147
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148 private:
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149 friend class methodOopDesc;
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150 friend class Klass;
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151 friend class ClassFileParser;
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152 // the functions below should only be called on the _access_flags inst var directly,
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153 // otherwise they are just changing a copy of the flags
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154
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155 // attribute flags
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156 void set_is_synthetic() { atomic_set_bits(JVM_ACC_SYNTHETIC); }
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157
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158 // methodOop flags
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159 void set_monitor_matching() { atomic_set_bits(JVM_ACC_MONITOR_MATCH); }
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160 void set_has_monitor_bytecodes() { atomic_set_bits(JVM_ACC_HAS_MONITOR_BYTECODES); }
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161 void set_has_loops() { atomic_set_bits(JVM_ACC_HAS_LOOPS); }
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162 void set_loops_flag_init() { atomic_set_bits(JVM_ACC_LOOPS_FLAG_INIT); }
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163 void set_not_tier1_compilable() { atomic_set_bits(JVM_ACC_NOT_TIER1_COMPILABLE); }
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164 void set_not_osr_compilable() { atomic_set_bits(JVM_ACC_NOT_OSR_COMPILABLE); }
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165 void set_has_linenumber_table() { atomic_set_bits(JVM_ACC_HAS_LINE_NUMBER_TABLE); }
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166 void set_has_checked_exceptions() { atomic_set_bits(JVM_ACC_HAS_CHECKED_EXCEPTIONS); }
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167 void set_has_jsrs() { atomic_set_bits(JVM_ACC_HAS_JSRS); }
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168 void set_is_old() { atomic_set_bits(JVM_ACC_IS_OLD); }
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169 void set_is_obsolete() { atomic_set_bits(JVM_ACC_IS_OBSOLETE); }
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170 void set_is_prefixed_native() { atomic_set_bits(JVM_ACC_IS_PREFIXED_NATIVE); }
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171
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172 // klassOop flags
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173 void set_has_vanilla_constructor() { atomic_set_bits(JVM_ACC_HAS_VANILLA_CONSTRUCTOR); }
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174 void set_has_finalizer() { atomic_set_bits(JVM_ACC_HAS_FINALIZER); }
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175 void set_has_final_method() { atomic_set_bits(JVM_ACC_HAS_FINAL_METHOD); }
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176 void set_is_cloneable() { atomic_set_bits(JVM_ACC_IS_CLONEABLE); }
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177 void set_has_miranda_methods() { atomic_set_bits(JVM_ACC_HAS_MIRANDA_METHODS); }
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178
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179 public:
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180 // field flags
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181 void set_is_field_access_watched(const bool value)
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182 {
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183 if (value) {
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184 atomic_set_bits(JVM_ACC_FIELD_ACCESS_WATCHED);
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185 } else {
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186 atomic_clear_bits(JVM_ACC_FIELD_ACCESS_WATCHED);
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187 }
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188 }
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189 void set_is_field_modification_watched(const bool value)
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190 {
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191 if (value) {
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192 atomic_set_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED);
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193 } else {
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194 atomic_clear_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED);
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195 }
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196 }
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197
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198 // Conversion
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199 jshort as_short() { return (jshort)_flags; }
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200 jint as_int() { return _flags; }
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201
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202 // Printing/debugging
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203 void print_on(outputStream* st) const PRODUCT_RETURN;
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204 };
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