1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/utilities/accessFlags.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,261 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_UTILITIES_ACCESSFLAGS_HPP
1.29 +#define SHARE_VM_UTILITIES_ACCESSFLAGS_HPP
1.30 +
1.31 +#include "prims/jvm.h"
1.32 +#include "utilities/top.hpp"
1.33 +
1.34 +// AccessFlags is an abstraction over Java access flags.
1.35 +
1.36 +
1.37 +enum {
1.38 + // See jvm.h for shared JVM_ACC_XXX access flags
1.39 +
1.40 + // HotSpot-specific access flags
1.41 +
1.42 + // flags actually put in .class file
1.43 + JVM_ACC_WRITTEN_FLAGS = 0x00007FFF,
1.44 +
1.45 + // Method* flags
1.46 + JVM_ACC_MONITOR_MATCH = 0x10000000, // True if we know that monitorenter/monitorexit bytecodes match
1.47 + JVM_ACC_HAS_MONITOR_BYTECODES = 0x20000000, // Method contains monitorenter/monitorexit bytecodes
1.48 + JVM_ACC_HAS_LOOPS = 0x40000000, // Method has loops
1.49 + JVM_ACC_LOOPS_FLAG_INIT = (int)0x80000000,// The loop flag has been initialized
1.50 + JVM_ACC_QUEUED = 0x01000000, // Queued for compilation
1.51 + JVM_ACC_NOT_C2_COMPILABLE = 0x02000000,
1.52 + JVM_ACC_NOT_C1_COMPILABLE = 0x04000000,
1.53 + JVM_ACC_NOT_C2_OSR_COMPILABLE = 0x08000000,
1.54 + JVM_ACC_HAS_LINE_NUMBER_TABLE = 0x00100000,
1.55 + JVM_ACC_HAS_CHECKED_EXCEPTIONS = 0x00400000,
1.56 + JVM_ACC_HAS_JSRS = 0x00800000,
1.57 + JVM_ACC_IS_OLD = 0x00010000, // RedefineClasses() has replaced this method
1.58 + JVM_ACC_IS_OBSOLETE = 0x00020000, // RedefineClasses() has made method obsolete
1.59 + JVM_ACC_IS_PREFIXED_NATIVE = 0x00040000, // JVMTI has prefixed this native method
1.60 + JVM_ACC_ON_STACK = 0x00080000, // RedefinedClasses() is used on the stack
1.61 +
1.62 + // Klass* flags
1.63 + JVM_ACC_HAS_MIRANDA_METHODS = 0x10000000, // True if this class has miranda methods in it's vtable
1.64 + JVM_ACC_HAS_VANILLA_CONSTRUCTOR = 0x20000000, // True if klass has a vanilla default constructor
1.65 + JVM_ACC_HAS_FINALIZER = 0x40000000, // True if klass has a non-empty finalize() method
1.66 + JVM_ACC_IS_CLONEABLE = (int)0x80000000,// True if klass supports the Clonable interface
1.67 + JVM_ACC_HAS_FINAL_METHOD = 0x01000000, // True if klass has final method
1.68 +
1.69 + // Klass* and Method* flags
1.70 + JVM_ACC_HAS_LOCAL_VARIABLE_TABLE= 0x00200000,
1.71 +
1.72 + JVM_ACC_PROMOTED_FLAGS = 0x00200000, // flags promoted from methods to the holding klass
1.73 +
1.74 + // field flags
1.75 + // Note: these flags must be defined in the low order 16 bits because
1.76 + // InstanceKlass only stores a ushort worth of information from the
1.77 + // AccessFlags value.
1.78 + // These bits must not conflict with any other field-related access flags
1.79 + // (e.g., ACC_ENUM).
1.80 + // Note that the class-related ACC_ANNOTATION bit conflicts with these flags.
1.81 + JVM_ACC_FIELD_ACCESS_WATCHED = 0x00002000, // field access is watched by JVMTI
1.82 + JVM_ACC_FIELD_MODIFICATION_WATCHED = 0x00008000, // field modification is watched by JVMTI
1.83 + JVM_ACC_FIELD_INTERNAL = 0x00000400, // internal field, same as JVM_ACC_ABSTRACT
1.84 + JVM_ACC_FIELD_STABLE = 0x00000020, // @Stable field, same as JVM_ACC_SYNCHRONIZED
1.85 + JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE = 0x00000800, // field has generic signature
1.86 +
1.87 + JVM_ACC_FIELD_INTERNAL_FLAGS = JVM_ACC_FIELD_ACCESS_WATCHED |
1.88 + JVM_ACC_FIELD_MODIFICATION_WATCHED |
1.89 + JVM_ACC_FIELD_INTERNAL |
1.90 + JVM_ACC_FIELD_STABLE |
1.91 + JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE,
1.92 +
1.93 + // flags accepted by set_field_flags()
1.94 + JVM_ACC_FIELD_FLAGS = JVM_RECOGNIZED_FIELD_MODIFIERS | JVM_ACC_FIELD_INTERNAL_FLAGS
1.95 +
1.96 +};
1.97 +
1.98 +
1.99 +class AccessFlags VALUE_OBJ_CLASS_SPEC {
1.100 + friend class VMStructs;
1.101 + private:
1.102 + jint _flags;
1.103 +
1.104 + public:
1.105 + // Java access flags
1.106 + bool is_public () const { return (_flags & JVM_ACC_PUBLIC ) != 0; }
1.107 + bool is_private () const { return (_flags & JVM_ACC_PRIVATE ) != 0; }
1.108 + bool is_protected () const { return (_flags & JVM_ACC_PROTECTED ) != 0; }
1.109 + bool is_static () const { return (_flags & JVM_ACC_STATIC ) != 0; }
1.110 + bool is_final () const { return (_flags & JVM_ACC_FINAL ) != 0; }
1.111 + bool is_synchronized() const { return (_flags & JVM_ACC_SYNCHRONIZED) != 0; }
1.112 + bool is_super () const { return (_flags & JVM_ACC_SUPER ) != 0; }
1.113 + bool is_volatile () const { return (_flags & JVM_ACC_VOLATILE ) != 0; }
1.114 + bool is_transient () const { return (_flags & JVM_ACC_TRANSIENT ) != 0; }
1.115 + bool is_native () const { return (_flags & JVM_ACC_NATIVE ) != 0; }
1.116 + bool is_interface () const { return (_flags & JVM_ACC_INTERFACE ) != 0; }
1.117 + bool is_abstract () const { return (_flags & JVM_ACC_ABSTRACT ) != 0; }
1.118 + bool is_strict () const { return (_flags & JVM_ACC_STRICT ) != 0; }
1.119 +
1.120 + // Attribute flags
1.121 + bool is_synthetic () const { return (_flags & JVM_ACC_SYNTHETIC ) != 0; }
1.122 +
1.123 + // Method* flags
1.124 + bool is_monitor_matching () const { return (_flags & JVM_ACC_MONITOR_MATCH ) != 0; }
1.125 + bool has_monitor_bytecodes () const { return (_flags & JVM_ACC_HAS_MONITOR_BYTECODES ) != 0; }
1.126 + bool has_loops () const { return (_flags & JVM_ACC_HAS_LOOPS ) != 0; }
1.127 + bool loops_flag_init () const { return (_flags & JVM_ACC_LOOPS_FLAG_INIT ) != 0; }
1.128 + bool queued_for_compilation () const { return (_flags & JVM_ACC_QUEUED ) != 0; }
1.129 + bool is_not_c1_compilable () const { return (_flags & JVM_ACC_NOT_C1_COMPILABLE ) != 0; }
1.130 + bool is_not_c2_compilable () const { return (_flags & JVM_ACC_NOT_C2_COMPILABLE ) != 0; }
1.131 + bool is_not_c2_osr_compilable() const { return (_flags & JVM_ACC_NOT_C2_OSR_COMPILABLE ) != 0; }
1.132 + bool has_linenumber_table () const { return (_flags & JVM_ACC_HAS_LINE_NUMBER_TABLE ) != 0; }
1.133 + bool has_checked_exceptions () const { return (_flags & JVM_ACC_HAS_CHECKED_EXCEPTIONS ) != 0; }
1.134 + bool has_jsrs () const { return (_flags & JVM_ACC_HAS_JSRS ) != 0; }
1.135 + bool is_old () const { return (_flags & JVM_ACC_IS_OLD ) != 0; }
1.136 + bool is_obsolete () const { return (_flags & JVM_ACC_IS_OBSOLETE ) != 0; }
1.137 + bool is_prefixed_native () const { return (_flags & JVM_ACC_IS_PREFIXED_NATIVE ) != 0; }
1.138 +
1.139 + // Klass* flags
1.140 + bool has_miranda_methods () const { return (_flags & JVM_ACC_HAS_MIRANDA_METHODS ) != 0; }
1.141 + bool has_vanilla_constructor () const { return (_flags & JVM_ACC_HAS_VANILLA_CONSTRUCTOR) != 0; }
1.142 + bool has_finalizer () const { return (_flags & JVM_ACC_HAS_FINALIZER ) != 0; }
1.143 + bool has_final_method () const { return (_flags & JVM_ACC_HAS_FINAL_METHOD ) != 0; }
1.144 + bool is_cloneable () const { return (_flags & JVM_ACC_IS_CLONEABLE ) != 0; }
1.145 + // Klass* and Method* flags
1.146 + bool has_localvariable_table () const { return (_flags & JVM_ACC_HAS_LOCAL_VARIABLE_TABLE) != 0; }
1.147 + void set_has_localvariable_table() { atomic_set_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); }
1.148 + void clear_has_localvariable_table() { atomic_clear_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); }
1.149 +
1.150 + // field flags
1.151 + bool is_field_access_watched() const { return (_flags & JVM_ACC_FIELD_ACCESS_WATCHED) != 0; }
1.152 + bool is_field_modification_watched() const
1.153 + { return (_flags & JVM_ACC_FIELD_MODIFICATION_WATCHED) != 0; }
1.154 + bool on_stack() const { return (_flags & JVM_ACC_ON_STACK) != 0; }
1.155 + bool is_internal() const { return (_flags & JVM_ACC_FIELD_INTERNAL) != 0; }
1.156 + bool is_stable() const { return (_flags & JVM_ACC_FIELD_STABLE) != 0; }
1.157 + bool field_has_generic_signature() const
1.158 + { return (_flags & JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE) != 0; }
1.159 +
1.160 + // get .class file flags
1.161 + jint get_flags () const { return (_flags & JVM_ACC_WRITTEN_FLAGS); }
1.162 +
1.163 + // Initialization
1.164 + void add_promoted_flags(jint flags) { _flags |= (flags & JVM_ACC_PROMOTED_FLAGS); }
1.165 + void set_field_flags(jint flags) {
1.166 + assert((flags & JVM_ACC_FIELD_FLAGS) == flags, "only recognized flags");
1.167 + _flags = (flags & JVM_ACC_FIELD_FLAGS);
1.168 + }
1.169 + void set_flags(jint flags) { _flags = (flags & JVM_ACC_WRITTEN_FLAGS); }
1.170 +
1.171 + void set_queued_for_compilation() { atomic_set_bits(JVM_ACC_QUEUED); }
1.172 + void clear_queued_for_compilation() { atomic_clear_bits(JVM_ACC_QUEUED); }
1.173 +
1.174 + // Atomic update of flags
1.175 + void atomic_set_bits(jint bits);
1.176 + void atomic_clear_bits(jint bits);
1.177 +
1.178 + private:
1.179 + friend class Method;
1.180 + friend class Klass;
1.181 + friend class ClassFileParser;
1.182 + // the functions below should only be called on the _access_flags inst var directly,
1.183 + // otherwise they are just changing a copy of the flags
1.184 +
1.185 + // attribute flags
1.186 + void set_is_synthetic() { atomic_set_bits(JVM_ACC_SYNTHETIC); }
1.187 +
1.188 + // Method* flags
1.189 + void set_monitor_matching() { atomic_set_bits(JVM_ACC_MONITOR_MATCH); }
1.190 + void set_has_monitor_bytecodes() { atomic_set_bits(JVM_ACC_HAS_MONITOR_BYTECODES); }
1.191 + void set_has_loops() { atomic_set_bits(JVM_ACC_HAS_LOOPS); }
1.192 + void set_loops_flag_init() { atomic_set_bits(JVM_ACC_LOOPS_FLAG_INIT); }
1.193 + void set_not_c1_compilable() { atomic_set_bits(JVM_ACC_NOT_C1_COMPILABLE); }
1.194 + void set_not_c2_compilable() { atomic_set_bits(JVM_ACC_NOT_C2_COMPILABLE); }
1.195 + void set_not_c2_osr_compilable() { atomic_set_bits(JVM_ACC_NOT_C2_OSR_COMPILABLE); }
1.196 + void set_has_linenumber_table() { atomic_set_bits(JVM_ACC_HAS_LINE_NUMBER_TABLE); }
1.197 + void set_has_checked_exceptions() { atomic_set_bits(JVM_ACC_HAS_CHECKED_EXCEPTIONS); }
1.198 + void set_has_jsrs() { atomic_set_bits(JVM_ACC_HAS_JSRS); }
1.199 + void set_is_old() { atomic_set_bits(JVM_ACC_IS_OLD); }
1.200 + void set_is_obsolete() { atomic_set_bits(JVM_ACC_IS_OBSOLETE); }
1.201 + void set_is_prefixed_native() { atomic_set_bits(JVM_ACC_IS_PREFIXED_NATIVE); }
1.202 +
1.203 + void clear_not_c1_compilable() { atomic_clear_bits(JVM_ACC_NOT_C1_COMPILABLE); }
1.204 + void clear_not_c2_compilable() { atomic_clear_bits(JVM_ACC_NOT_C2_COMPILABLE); }
1.205 + void clear_not_c2_osr_compilable() { atomic_clear_bits(JVM_ACC_NOT_C2_OSR_COMPILABLE); }
1.206 + // Klass* flags
1.207 + void set_has_vanilla_constructor() { atomic_set_bits(JVM_ACC_HAS_VANILLA_CONSTRUCTOR); }
1.208 + void set_has_finalizer() { atomic_set_bits(JVM_ACC_HAS_FINALIZER); }
1.209 + void set_has_final_method() { atomic_set_bits(JVM_ACC_HAS_FINAL_METHOD); }
1.210 + void set_is_cloneable() { atomic_set_bits(JVM_ACC_IS_CLONEABLE); }
1.211 + void set_has_miranda_methods() { atomic_set_bits(JVM_ACC_HAS_MIRANDA_METHODS); }
1.212 +
1.213 + public:
1.214 + // field flags
1.215 + void set_is_field_access_watched(const bool value)
1.216 + {
1.217 + if (value) {
1.218 + atomic_set_bits(JVM_ACC_FIELD_ACCESS_WATCHED);
1.219 + } else {
1.220 + atomic_clear_bits(JVM_ACC_FIELD_ACCESS_WATCHED);
1.221 + }
1.222 + }
1.223 + void set_is_field_modification_watched(const bool value)
1.224 + {
1.225 + if (value) {
1.226 + atomic_set_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED);
1.227 + } else {
1.228 + atomic_clear_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED);
1.229 + }
1.230 + }
1.231 + void set_field_has_generic_signature()
1.232 + {
1.233 + atomic_set_bits(JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE);
1.234 + }
1.235 +
1.236 + void set_on_stack(const bool value)
1.237 + {
1.238 + if (value) {
1.239 + atomic_set_bits(JVM_ACC_ON_STACK);
1.240 + } else {
1.241 + atomic_clear_bits(JVM_ACC_ON_STACK);
1.242 + }
1.243 + }
1.244 + // Conversion
1.245 + jshort as_short() const { return (jshort)_flags; }
1.246 + jint as_int() const { return _flags; }
1.247 +
1.248 + inline friend AccessFlags accessFlags_from(jint flags);
1.249 +
1.250 + // Printing/debugging
1.251 +#if INCLUDE_JVMTI
1.252 + void print_on(outputStream* st) const;
1.253 +#else
1.254 + void print_on(outputStream* st) const PRODUCT_RETURN;
1.255 +#endif
1.256 +};
1.257 +
1.258 +inline AccessFlags accessFlags_from(jint flags) {
1.259 + AccessFlags af;
1.260 + af._flags = flags;
1.261 + return af;
1.262 +}
1.263 +
1.264 +#endif // SHARE_VM_UTILITIES_ACCESSFLAGS_HPP
