hotspot/src/share/vm/utilities/accessFlags.hpp
author iignatyev
Tue, 09 Apr 2013 09:54:17 -0700
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child 19770 7cb9f982ea81
permissions -rw-r--r--
8007288: Additional WB API for compiler's testing Reviewed-by: kvn, vlivanov
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/*
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 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_UTILITIES_ACCESSFLAGS_HPP
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#define SHARE_VM_UTILITIES_ACCESSFLAGS_HPP
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#include "prims/jvm.h"
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#include "utilities/top.hpp"
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// AccessFlags is an abstraction over Java access flags.
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enum {
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  // See jvm.h for shared JVM_ACC_XXX access flags
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  // HotSpot-specific access flags
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  // flags actually put in .class file
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  JVM_ACC_WRITTEN_FLAGS           = 0x00007FFF,
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  // Method* flags
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  JVM_ACC_MONITOR_MATCH           = 0x10000000,     // True if we know that monitorenter/monitorexit bytecodes match
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  JVM_ACC_HAS_MONITOR_BYTECODES   = 0x20000000,     // Method contains monitorenter/monitorexit bytecodes
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  JVM_ACC_HAS_LOOPS               = 0x40000000,     // Method has loops
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  JVM_ACC_LOOPS_FLAG_INIT         = (int)0x80000000,// The loop flag has been initialized
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  JVM_ACC_QUEUED                  = 0x01000000,     // Queued for compilation
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  JVM_ACC_NOT_C2_COMPILABLE       = 0x02000000,
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  JVM_ACC_NOT_C1_COMPILABLE       = 0x04000000,
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  JVM_ACC_NOT_C2_OSR_COMPILABLE   = 0x08000000,
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  JVM_ACC_HAS_LINE_NUMBER_TABLE   = 0x00100000,
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  JVM_ACC_HAS_CHECKED_EXCEPTIONS  = 0x00400000,
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  JVM_ACC_HAS_JSRS                = 0x00800000,
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  JVM_ACC_IS_OLD                  = 0x00010000,     // RedefineClasses() has replaced this method
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  JVM_ACC_IS_OBSOLETE             = 0x00020000,     // RedefineClasses() has made method obsolete
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  JVM_ACC_IS_PREFIXED_NATIVE      = 0x00040000,     // JVMTI has prefixed this native method
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  JVM_ACC_ON_STACK                = 0x00080000,     // RedefinedClasses() is used on the stack
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  // Klass* flags
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  JVM_ACC_HAS_MIRANDA_METHODS     = 0x10000000,     // True if this class has miranda methods in it's vtable
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  JVM_ACC_HAS_VANILLA_CONSTRUCTOR = 0x20000000,     // True if klass has a vanilla default constructor
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  JVM_ACC_HAS_FINALIZER           = 0x40000000,     // True if klass has a non-empty finalize() method
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  JVM_ACC_IS_CLONEABLE            = (int)0x80000000,// True if klass supports the Clonable interface
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  JVM_ACC_HAS_FINAL_METHOD        = 0x01000000,     // True if klass has final method
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  // Klass* and Method* flags
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  JVM_ACC_HAS_LOCAL_VARIABLE_TABLE= 0x00200000,
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  JVM_ACC_PROMOTED_FLAGS          = 0x00200000,     // flags promoted from methods to the holding klass
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  // field flags
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  // Note: these flags must be defined in the low order 16 bits because
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  // InstanceKlass only stores a ushort worth of information from the
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  // AccessFlags value.
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  // These bits must not conflict with any other field-related access flags
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  // (e.g., ACC_ENUM).
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  // Note that the class-related ACC_ANNOTATION bit conflicts with these flags.
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  JVM_ACC_FIELD_ACCESS_WATCHED       = 0x00002000,  // field access is watched by JVMTI
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  JVM_ACC_FIELD_MODIFICATION_WATCHED = 0x00008000,  // field modification is watched by JVMTI
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  JVM_ACC_FIELD_INTERNAL             = 0x00000400,  // internal field, same as JVM_ACC_ABSTRACT
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  JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE = 0x00000800, // field has generic signature
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  JVM_ACC_FIELD_INTERNAL_FLAGS       = JVM_ACC_FIELD_ACCESS_WATCHED |
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                                       JVM_ACC_FIELD_MODIFICATION_WATCHED |
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                                       JVM_ACC_FIELD_INTERNAL |
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                                       JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE,
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                                                    // flags accepted by set_field_flags()
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  JVM_ACC_FIELD_FLAGS                = JVM_RECOGNIZED_FIELD_MODIFIERS | JVM_ACC_FIELD_INTERNAL_FLAGS
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};
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class AccessFlags VALUE_OBJ_CLASS_SPEC {
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  friend class VMStructs;
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 private:
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  jint _flags;
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 public:
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  // Java access flags
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  bool is_public      () const         { return (_flags & JVM_ACC_PUBLIC      ) != 0; }
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  bool is_private     () const         { return (_flags & JVM_ACC_PRIVATE     ) != 0; }
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  bool is_protected   () const         { return (_flags & JVM_ACC_PROTECTED   ) != 0; }
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  bool is_static      () const         { return (_flags & JVM_ACC_STATIC      ) != 0; }
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  bool is_final       () const         { return (_flags & JVM_ACC_FINAL       ) != 0; }
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  bool is_synchronized() const         { return (_flags & JVM_ACC_SYNCHRONIZED) != 0; }
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  bool is_super       () const         { return (_flags & JVM_ACC_SUPER       ) != 0; }
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  bool is_volatile    () const         { return (_flags & JVM_ACC_VOLATILE    ) != 0; }
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  bool is_transient   () const         { return (_flags & JVM_ACC_TRANSIENT   ) != 0; }
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  bool is_native      () const         { return (_flags & JVM_ACC_NATIVE      ) != 0; }
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  bool is_interface   () const         { return (_flags & JVM_ACC_INTERFACE   ) != 0; }
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  bool is_abstract    () const         { return (_flags & JVM_ACC_ABSTRACT    ) != 0; }
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  bool is_strict      () const         { return (_flags & JVM_ACC_STRICT      ) != 0; }
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  // Attribute flags
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  bool is_synthetic   () const         { return (_flags & JVM_ACC_SYNTHETIC   ) != 0; }
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  // Method* flags
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  bool is_monitor_matching     () const { return (_flags & JVM_ACC_MONITOR_MATCH          ) != 0; }
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  bool has_monitor_bytecodes   () const { return (_flags & JVM_ACC_HAS_MONITOR_BYTECODES  ) != 0; }
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  bool has_loops               () const { return (_flags & JVM_ACC_HAS_LOOPS              ) != 0; }
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  bool loops_flag_init         () const { return (_flags & JVM_ACC_LOOPS_FLAG_INIT        ) != 0; }
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  bool queued_for_compilation  () const { return (_flags & JVM_ACC_QUEUED                 ) != 0; }
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  bool is_not_c1_compilable    () const { return (_flags & JVM_ACC_NOT_C1_COMPILABLE      ) != 0; }
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  bool is_not_c2_compilable    () const { return (_flags & JVM_ACC_NOT_C2_COMPILABLE      ) != 0; }
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  bool is_not_c2_osr_compilable() const { return (_flags & JVM_ACC_NOT_C2_OSR_COMPILABLE  ) != 0; }
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  bool has_linenumber_table    () const { return (_flags & JVM_ACC_HAS_LINE_NUMBER_TABLE  ) != 0; }
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  bool has_checked_exceptions  () const { return (_flags & JVM_ACC_HAS_CHECKED_EXCEPTIONS ) != 0; }
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  bool has_jsrs                () const { return (_flags & JVM_ACC_HAS_JSRS               ) != 0; }
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  bool is_old                  () const { return (_flags & JVM_ACC_IS_OLD                 ) != 0; }
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  bool is_obsolete             () const { return (_flags & JVM_ACC_IS_OBSOLETE            ) != 0; }
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  bool is_prefixed_native      () const { return (_flags & JVM_ACC_IS_PREFIXED_NATIVE     ) != 0; }
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  // Klass* flags
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  bool has_miranda_methods     () const { return (_flags & JVM_ACC_HAS_MIRANDA_METHODS    ) != 0; }
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  bool has_vanilla_constructor () const { return (_flags & JVM_ACC_HAS_VANILLA_CONSTRUCTOR) != 0; }
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  bool has_finalizer           () const { return (_flags & JVM_ACC_HAS_FINALIZER          ) != 0; }
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  bool has_final_method        () const { return (_flags & JVM_ACC_HAS_FINAL_METHOD       ) != 0; }
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  bool is_cloneable            () const { return (_flags & JVM_ACC_IS_CLONEABLE           ) != 0; }
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  // Klass* and Method* flags
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  bool has_localvariable_table () const { return (_flags & JVM_ACC_HAS_LOCAL_VARIABLE_TABLE) != 0; }
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  void set_has_localvariable_table()    { atomic_set_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); }
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  void clear_has_localvariable_table()  { atomic_clear_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); }
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  // field flags
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  bool is_field_access_watched() const  { return (_flags & JVM_ACC_FIELD_ACCESS_WATCHED) != 0; }
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  bool is_field_modification_watched() const
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                                        { return (_flags & JVM_ACC_FIELD_MODIFICATION_WATCHED) != 0; }
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  bool on_stack() const                 { return (_flags & JVM_ACC_ON_STACK) != 0; }
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  bool is_internal() const              { return (_flags & JVM_ACC_FIELD_INTERNAL) != 0; }
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  bool field_has_generic_signature() const
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                                        { return (_flags & JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE) != 0; }
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  // get .class file flags
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  jint get_flags               () const { return (_flags & JVM_ACC_WRITTEN_FLAGS); }
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  // Initialization
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  void add_promoted_flags(jint flags)   { _flags |= (flags & JVM_ACC_PROMOTED_FLAGS); }
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  void set_field_flags(jint flags)      {
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    assert((flags & JVM_ACC_FIELD_FLAGS) == flags, "only recognized flags");
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    _flags = (flags & JVM_ACC_FIELD_FLAGS);
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  }
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  void set_flags(jint flags)            { _flags = (flags & JVM_ACC_WRITTEN_FLAGS); }
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  void set_queued_for_compilation()    { atomic_set_bits(JVM_ACC_QUEUED); }
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  void clear_queued_for_compilation()  { atomic_clear_bits(JVM_ACC_QUEUED); }
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  // Atomic update of flags
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  void atomic_set_bits(jint bits);
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  void atomic_clear_bits(jint bits);
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 private:
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  friend class Method;
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  friend class Klass;
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  friend class ClassFileParser;
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  // the functions below should only be called on the _access_flags inst var directly,
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  // otherwise they are just changing a copy of the flags
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  // attribute flags
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  void set_is_synthetic()              { atomic_set_bits(JVM_ACC_SYNTHETIC);               }
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  // Method* flags
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  void set_monitor_matching()          { atomic_set_bits(JVM_ACC_MONITOR_MATCH);           }
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  void set_has_monitor_bytecodes()     { atomic_set_bits(JVM_ACC_HAS_MONITOR_BYTECODES);   }
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  void set_has_loops()                 { atomic_set_bits(JVM_ACC_HAS_LOOPS);               }
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  void set_loops_flag_init()           { atomic_set_bits(JVM_ACC_LOOPS_FLAG_INIT);         }
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  void set_not_c1_compilable()         { atomic_set_bits(JVM_ACC_NOT_C1_COMPILABLE);       }
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  void set_not_c2_compilable()         { atomic_set_bits(JVM_ACC_NOT_C2_COMPILABLE);       }
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  void set_not_c2_osr_compilable()     { atomic_set_bits(JVM_ACC_NOT_C2_OSR_COMPILABLE);   }
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  void set_has_linenumber_table()      { atomic_set_bits(JVM_ACC_HAS_LINE_NUMBER_TABLE);   }
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  void set_has_checked_exceptions()    { atomic_set_bits(JVM_ACC_HAS_CHECKED_EXCEPTIONS);  }
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  void set_has_jsrs()                  { atomic_set_bits(JVM_ACC_HAS_JSRS);                }
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  void set_is_old()                    { atomic_set_bits(JVM_ACC_IS_OLD);                  }
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  void set_is_obsolete()               { atomic_set_bits(JVM_ACC_IS_OBSOLETE);             }
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  void set_is_prefixed_native()        { atomic_set_bits(JVM_ACC_IS_PREFIXED_NATIVE);      }
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  void clear_not_c1_compilable()       { atomic_clear_bits(JVM_ACC_NOT_C1_COMPILABLE);       }
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  void clear_not_c2_compilable()       { atomic_clear_bits(JVM_ACC_NOT_C2_COMPILABLE);       }
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  void clear_not_c2_osr_compilable()   { atomic_clear_bits(JVM_ACC_NOT_C2_OSR_COMPILABLE);   }
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  // Klass* flags
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  void set_has_vanilla_constructor()   { atomic_set_bits(JVM_ACC_HAS_VANILLA_CONSTRUCTOR); }
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  void set_has_finalizer()             { atomic_set_bits(JVM_ACC_HAS_FINALIZER);           }
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  void set_has_final_method()          { atomic_set_bits(JVM_ACC_HAS_FINAL_METHOD);        }
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  void set_is_cloneable()              { atomic_set_bits(JVM_ACC_IS_CLONEABLE);            }
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  void set_has_miranda_methods()       { atomic_set_bits(JVM_ACC_HAS_MIRANDA_METHODS);     }
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 public:
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  // field flags
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  void set_is_field_access_watched(const bool value)
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                                       {
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                                         if (value) {
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                                           atomic_set_bits(JVM_ACC_FIELD_ACCESS_WATCHED);
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                                         } else {
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                                           atomic_clear_bits(JVM_ACC_FIELD_ACCESS_WATCHED);
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                                         }
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                                       }
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  void set_is_field_modification_watched(const bool value)
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                                       {
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                                         if (value) {
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                                           atomic_set_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED);
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                                         } else {
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                                           atomic_clear_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED);
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                                         }
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                                       }
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  void set_field_has_generic_signature()
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                                       {
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                                         atomic_set_bits(JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE);
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                                       }
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  void set_on_stack(const bool value)
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                                       {
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                                         if (value) {
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                                           atomic_set_bits(JVM_ACC_ON_STACK);
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                                         } else {
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                                           atomic_clear_bits(JVM_ACC_ON_STACK);
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                                         }
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                                       }
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  // Conversion
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  jshort as_short() const              { return (jshort)_flags; }
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  jint   as_int() const                { return _flags; }
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  inline friend AccessFlags accessFlags_from(jint flags);
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  // Printing/debugging
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#if INCLUDE_JVMTI
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  void print_on(outputStream* st) const;
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#else
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  void print_on(outputStream* st) const PRODUCT_RETURN;
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#endif
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};
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inline AccessFlags accessFlags_from(jint flags) {
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  AccessFlags af;
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  af._flags = flags;
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  return af;
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}
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#endif // SHARE_VM_UTILITIES_ACCESSFLAGS_HPP