/* * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_UTILITIES_ACCESSFLAGS_HPP #define SHARE_VM_UTILITIES_ACCESSFLAGS_HPP #include "prims/jvm.h" #include "utilities/top.hpp" // AccessFlags is an abstraction over Java access flags. enum { // See jvm.h for shared JVM_ACC_XXX access flags // HotSpot-specific access flags // flags actually put in .class file JVM_ACC_WRITTEN_FLAGS = 0x00007FFF, // Method* flags JVM_ACC_MONITOR_MATCH = 0x10000000, // True if we know that monitorenter/monitorexit bytecodes match JVM_ACC_HAS_MONITOR_BYTECODES = 0x20000000, // Method contains monitorenter/monitorexit bytecodes JVM_ACC_HAS_LOOPS = 0x40000000, // Method has loops JVM_ACC_LOOPS_FLAG_INIT = (int)0x80000000,// The loop flag has been initialized JVM_ACC_QUEUED = 0x01000000, // Queued for compilation JVM_ACC_NOT_C2_COMPILABLE = 0x02000000, JVM_ACC_NOT_C1_COMPILABLE = 0x04000000, JVM_ACC_NOT_C2_OSR_COMPILABLE = 0x08000000, JVM_ACC_HAS_LINE_NUMBER_TABLE = 0x00100000, JVM_ACC_HAS_CHECKED_EXCEPTIONS = 0x00400000, JVM_ACC_HAS_JSRS = 0x00800000, JVM_ACC_IS_OLD = 0x00010000, // RedefineClasses() has replaced this method JVM_ACC_IS_OBSOLETE = 0x00020000, // RedefineClasses() has made method obsolete JVM_ACC_IS_PREFIXED_NATIVE = 0x00040000, // JVMTI has prefixed this native method JVM_ACC_ON_STACK = 0x00080000, // RedefinedClasses() is used on the stack // Klass* flags JVM_ACC_HAS_MIRANDA_METHODS = 0x10000000, // True if this class has miranda methods in it's vtable JVM_ACC_HAS_VANILLA_CONSTRUCTOR = 0x20000000, // True if klass has a vanilla default constructor JVM_ACC_HAS_FINALIZER = 0x40000000, // True if klass has a non-empty finalize() method JVM_ACC_IS_CLONEABLE = (int)0x80000000,// True if klass supports the Clonable interface JVM_ACC_HAS_FINAL_METHOD = 0x01000000, // True if klass has final method // Klass* and Method* flags JVM_ACC_HAS_LOCAL_VARIABLE_TABLE= 0x00200000, JVM_ACC_PROMOTED_FLAGS = 0x00200000, // flags promoted from methods to the holding klass // field flags // Note: these flags must be defined in the low order 16 bits because // InstanceKlass only stores a ushort worth of information from the // AccessFlags value. // These bits must not conflict with any other field-related access flags // (e.g., ACC_ENUM). // Note that the class-related ACC_ANNOTATION bit conflicts with these flags. JVM_ACC_FIELD_ACCESS_WATCHED = 0x00002000, // field access is watched by JVMTI JVM_ACC_FIELD_MODIFICATION_WATCHED = 0x00008000, // field modification is watched by JVMTI JVM_ACC_FIELD_INTERNAL = 0x00000400, // internal field, same as JVM_ACC_ABSTRACT JVM_ACC_FIELD_STABLE = 0x00000020, // @Stable field, same as JVM_ACC_SYNCHRONIZED JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE = 0x00000800, // field has generic signature JVM_ACC_FIELD_INTERNAL_FLAGS = JVM_ACC_FIELD_ACCESS_WATCHED | JVM_ACC_FIELD_MODIFICATION_WATCHED | JVM_ACC_FIELD_INTERNAL | JVM_ACC_FIELD_STABLE | JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE, // flags accepted by set_field_flags() JVM_ACC_FIELD_FLAGS = JVM_RECOGNIZED_FIELD_MODIFIERS | JVM_ACC_FIELD_INTERNAL_FLAGS }; class AccessFlags VALUE_OBJ_CLASS_SPEC { friend class VMStructs; private: jint _flags; public: // Java access flags bool is_public () const { return (_flags & JVM_ACC_PUBLIC ) != 0; } bool is_private () const { return (_flags & JVM_ACC_PRIVATE ) != 0; } bool is_protected () const { return (_flags & JVM_ACC_PROTECTED ) != 0; } bool is_static () const { return (_flags & JVM_ACC_STATIC ) != 0; } bool is_final () const { return (_flags & JVM_ACC_FINAL ) != 0; } bool is_synchronized() const { return (_flags & JVM_ACC_SYNCHRONIZED) != 0; } bool is_super () const { return (_flags & JVM_ACC_SUPER ) != 0; } bool is_volatile () const { return (_flags & JVM_ACC_VOLATILE ) != 0; } bool is_transient () const { return (_flags & JVM_ACC_TRANSIENT ) != 0; } bool is_native () const { return (_flags & JVM_ACC_NATIVE ) != 0; } bool is_interface () const { return (_flags & JVM_ACC_INTERFACE ) != 0; } bool is_abstract () const { return (_flags & JVM_ACC_ABSTRACT ) != 0; } bool is_strict () const { return (_flags & JVM_ACC_STRICT ) != 0; } // Attribute flags bool is_synthetic () const { return (_flags & JVM_ACC_SYNTHETIC ) != 0; } // Method* flags bool is_monitor_matching () const { return (_flags & JVM_ACC_MONITOR_MATCH ) != 0; } bool has_monitor_bytecodes () const { return (_flags & JVM_ACC_HAS_MONITOR_BYTECODES ) != 0; } bool has_loops () const { return (_flags & JVM_ACC_HAS_LOOPS ) != 0; } bool loops_flag_init () const { return (_flags & JVM_ACC_LOOPS_FLAG_INIT ) != 0; } bool queued_for_compilation () const { return (_flags & JVM_ACC_QUEUED ) != 0; } bool is_not_c1_compilable () const { return (_flags & JVM_ACC_NOT_C1_COMPILABLE ) != 0; } bool is_not_c2_compilable () const { return (_flags & JVM_ACC_NOT_C2_COMPILABLE ) != 0; } bool is_not_c2_osr_compilable() const { return (_flags & JVM_ACC_NOT_C2_OSR_COMPILABLE ) != 0; } bool has_linenumber_table () const { return (_flags & JVM_ACC_HAS_LINE_NUMBER_TABLE ) != 0; } bool has_checked_exceptions () const { return (_flags & JVM_ACC_HAS_CHECKED_EXCEPTIONS ) != 0; } bool has_jsrs () const { return (_flags & JVM_ACC_HAS_JSRS ) != 0; } bool is_old () const { return (_flags & JVM_ACC_IS_OLD ) != 0; } bool is_obsolete () const { return (_flags & JVM_ACC_IS_OBSOLETE ) != 0; } bool is_prefixed_native () const { return (_flags & JVM_ACC_IS_PREFIXED_NATIVE ) != 0; } // Klass* flags bool has_miranda_methods () const { return (_flags & JVM_ACC_HAS_MIRANDA_METHODS ) != 0; } bool has_vanilla_constructor () const { return (_flags & JVM_ACC_HAS_VANILLA_CONSTRUCTOR) != 0; } bool has_finalizer () const { return (_flags & JVM_ACC_HAS_FINALIZER ) != 0; } bool has_final_method () const { return (_flags & JVM_ACC_HAS_FINAL_METHOD ) != 0; } bool is_cloneable () const { return (_flags & JVM_ACC_IS_CLONEABLE ) != 0; } // Klass* and Method* flags bool has_localvariable_table () const { return (_flags & JVM_ACC_HAS_LOCAL_VARIABLE_TABLE) != 0; } void set_has_localvariable_table() { atomic_set_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); } void clear_has_localvariable_table() { atomic_clear_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); } // field flags bool is_field_access_watched() const { return (_flags & JVM_ACC_FIELD_ACCESS_WATCHED) != 0; } bool is_field_modification_watched() const { return (_flags & JVM_ACC_FIELD_MODIFICATION_WATCHED) != 0; } bool on_stack() const { return (_flags & JVM_ACC_ON_STACK) != 0; } bool is_internal() const { return (_flags & JVM_ACC_FIELD_INTERNAL) != 0; } bool is_stable() const { return (_flags & JVM_ACC_FIELD_STABLE) != 0; } bool field_has_generic_signature() const { return (_flags & JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE) != 0; } // get .class file flags jint get_flags () const { return (_flags & JVM_ACC_WRITTEN_FLAGS); } // Initialization void add_promoted_flags(jint flags) { _flags |= (flags & JVM_ACC_PROMOTED_FLAGS); } void set_field_flags(jint flags) { assert((flags & JVM_ACC_FIELD_FLAGS) == flags, "only recognized flags"); _flags = (flags & JVM_ACC_FIELD_FLAGS); } void set_flags(jint flags) { _flags = (flags & JVM_ACC_WRITTEN_FLAGS); } void set_queued_for_compilation() { atomic_set_bits(JVM_ACC_QUEUED); } void clear_queued_for_compilation() { atomic_clear_bits(JVM_ACC_QUEUED); } // Atomic update of flags void atomic_set_bits(jint bits); void atomic_clear_bits(jint bits); private: friend class Method; friend class Klass; friend class ClassFileParser; // the functions below should only be called on the _access_flags inst var directly, // otherwise they are just changing a copy of the flags // attribute flags void set_is_synthetic() { atomic_set_bits(JVM_ACC_SYNTHETIC); } // Method* flags void set_monitor_matching() { atomic_set_bits(JVM_ACC_MONITOR_MATCH); } void set_has_monitor_bytecodes() { atomic_set_bits(JVM_ACC_HAS_MONITOR_BYTECODES); } void set_has_loops() { atomic_set_bits(JVM_ACC_HAS_LOOPS); } void set_loops_flag_init() { atomic_set_bits(JVM_ACC_LOOPS_FLAG_INIT); } void set_not_c1_compilable() { atomic_set_bits(JVM_ACC_NOT_C1_COMPILABLE); } void set_not_c2_compilable() { atomic_set_bits(JVM_ACC_NOT_C2_COMPILABLE); } void set_not_c2_osr_compilable() { atomic_set_bits(JVM_ACC_NOT_C2_OSR_COMPILABLE); } void set_has_linenumber_table() { atomic_set_bits(JVM_ACC_HAS_LINE_NUMBER_TABLE); } void set_has_checked_exceptions() { atomic_set_bits(JVM_ACC_HAS_CHECKED_EXCEPTIONS); } void set_has_jsrs() { atomic_set_bits(JVM_ACC_HAS_JSRS); } void set_is_old() { atomic_set_bits(JVM_ACC_IS_OLD); } void set_is_obsolete() { atomic_set_bits(JVM_ACC_IS_OBSOLETE); } void set_is_prefixed_native() { atomic_set_bits(JVM_ACC_IS_PREFIXED_NATIVE); } void clear_not_c1_compilable() { atomic_clear_bits(JVM_ACC_NOT_C1_COMPILABLE); } void clear_not_c2_compilable() { atomic_clear_bits(JVM_ACC_NOT_C2_COMPILABLE); } void clear_not_c2_osr_compilable() { atomic_clear_bits(JVM_ACC_NOT_C2_OSR_COMPILABLE); } // Klass* flags void set_has_vanilla_constructor() { atomic_set_bits(JVM_ACC_HAS_VANILLA_CONSTRUCTOR); } void set_has_finalizer() { atomic_set_bits(JVM_ACC_HAS_FINALIZER); } void set_has_final_method() { atomic_set_bits(JVM_ACC_HAS_FINAL_METHOD); } void set_is_cloneable() { atomic_set_bits(JVM_ACC_IS_CLONEABLE); } void set_has_miranda_methods() { atomic_set_bits(JVM_ACC_HAS_MIRANDA_METHODS); } public: // field flags void set_is_field_access_watched(const bool value) { if (value) { atomic_set_bits(JVM_ACC_FIELD_ACCESS_WATCHED); } else { atomic_clear_bits(JVM_ACC_FIELD_ACCESS_WATCHED); } } void set_is_field_modification_watched(const bool value) { if (value) { atomic_set_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED); } else { atomic_clear_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED); } } void set_field_has_generic_signature() { atomic_set_bits(JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE); } void set_on_stack(const bool value) { if (value) { atomic_set_bits(JVM_ACC_ON_STACK); } else { atomic_clear_bits(JVM_ACC_ON_STACK); } } // Conversion jshort as_short() const { return (jshort)_flags; } jint as_int() const { return _flags; } inline friend AccessFlags accessFlags_from(jint flags); // Printing/debugging #if INCLUDE_JVMTI void print_on(outputStream* st) const; #else void print_on(outputStream* st) const PRODUCT_RETURN; #endif }; inline AccessFlags accessFlags_from(jint flags) { AccessFlags af; af._flags = flags; return af; } #endif // SHARE_VM_UTILITIES_ACCESSFLAGS_HPP