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src/share/vm/utilities/accessFlags.hpp@e6b1331a51d2 (annotated)

src/share/vm/utilities/accessFlags.hpp

Sat, 10 Sep 2011 17:29:02 -0700

author

never

date

Sat, 10 Sep 2011 17:29:02 -0700

changeset 3137

e6b1331a51d2

parent 2314

f95d63e2154a

child 3803

71afdabfd05b

permissions

-rw-r--r--

7086585: make Java field injection more flexible
Reviewed-by: jrose, twisti, kvn, coleenp

duke@435	1	/*
iveresov@2138	2	* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_UTILITIES_ACCESSFLAGS_HPP
stefank@2314	26	#define SHARE_VM_UTILITIES_ACCESSFLAGS_HPP
stefank@2314	27
stefank@2314	28	#include "prims/jvm.h"
stefank@2314	29	#include "utilities/top.hpp"
stefank@2314	30
duke@435	31	// AccessFlags is an abstraction over Java access flags.
duke@435	32
duke@435	33
duke@435	34	enum {
duke@435	35	// See jvm.h for shared JVM_ACC_XXX access flags
duke@435	36
duke@435	37	// HotSpot-specific access flags
duke@435	38
duke@435	39	// flags actually put in .class file
duke@435	40	JVM_ACC_WRITTEN_FLAGS = 0x00007FFF,
duke@435	41
duke@435	42	// methodOop flags
duke@435	43	JVM_ACC_MONITOR_MATCH = 0x10000000, // True if we know that monitorenter/monitorexit bytecodes match
duke@435	44	JVM_ACC_HAS_MONITOR_BYTECODES = 0x20000000, // Method contains monitorenter/monitorexit bytecodes
duke@435	45	JVM_ACC_HAS_LOOPS = 0x40000000, // Method has loops
duke@435	46	JVM_ACC_LOOPS_FLAG_INIT = (int)0x80000000,// The loop flag has been initialized
duke@435	47	JVM_ACC_QUEUED = 0x01000000, // Queued for compilation
iveresov@2138	48	JVM_ACC_NOT_C2_COMPILABLE = 0x02000000,
iveresov@2138	49	JVM_ACC_NOT_C1_COMPILABLE = 0x04000000,
duke@435	50	JVM_ACC_NOT_OSR_COMPILABLE = 0x08000000,
duke@435	51	JVM_ACC_HAS_LINE_NUMBER_TABLE = 0x00100000,
duke@435	52	JVM_ACC_HAS_CHECKED_EXCEPTIONS = 0x00400000,
duke@435	53	JVM_ACC_HAS_JSRS = 0x00800000,
duke@435	54	JVM_ACC_IS_OLD = 0x00010000, // RedefineClasses() has replaced this method
duke@435	55	JVM_ACC_IS_OBSOLETE = 0x00020000, // RedefineClasses() has made method obsolete
duke@435	56	JVM_ACC_IS_PREFIXED_NATIVE = 0x00040000, // JVMTI has prefixed this native method
iveresov@2138	57
jrose@1145	58	JVM_MH_INVOKE_BITS // = 0x10001100 // MethodHandle.invoke quasi-native
jrose@1145	59	= (JVM_ACC_NATIVE | JVM_ACC_SYNTHETIC | JVM_ACC_MONITOR_MATCH),
duke@435	60
duke@435	61	// klassOop flags
duke@435	62	JVM_ACC_HAS_MIRANDA_METHODS = 0x10000000, // True if this class has miranda methods in it's vtable
duke@435	63	JVM_ACC_HAS_VANILLA_CONSTRUCTOR = 0x20000000, // True if klass has a vanilla default constructor
duke@435	64	JVM_ACC_HAS_FINALIZER = 0x40000000, // True if klass has a non-empty finalize() method
duke@435	65	JVM_ACC_IS_CLONEABLE = (int)0x80000000,// True if klass supports the Clonable interface
duke@435	66	JVM_ACC_HAS_FINAL_METHOD = 0x01000000, // True if klass has final method
duke@435	67
duke@435	68	// klassOop and methodOop flags
duke@435	69	JVM_ACC_HAS_LOCAL_VARIABLE_TABLE= 0x00200000,
duke@435	70
duke@435	71	JVM_ACC_PROMOTED_FLAGS = 0x00200000, // flags promoted from methods to the holding klass
duke@435	72
duke@435	73	// field flags
duke@435	74	// Note: these flags must be defined in the low order 16 bits because
duke@435	75	// instanceKlass only stores a ushort worth of information from the
duke@435	76	// AccessFlags value.
duke@435	77	// These bits must not conflict with any other field-related access flags
duke@435	78	// (e.g., ACC_ENUM).
duke@435	79	// Note that the class-related ACC_ANNOTATION bit conflicts with these flags.
duke@435	80	JVM_ACC_FIELD_ACCESS_WATCHED = 0x00002000, // field access is watched by JVMTI
duke@435	81	JVM_ACC_FIELD_MODIFICATION_WATCHED = 0x00008000, // field modification is watched by JVMTI
never@3137	82	JVM_ACC_FIELD_INTERNAL = 0x00000400, // internal field, same as JVM_ACC_ABSTRACT
never@3137	83
never@3137	84	JVM_ACC_FIELD_INTERNAL_FLAGS = JVM_ACC_FIELD_ACCESS_WATCHED |
never@3137	85	JVM_ACC_FIELD_MODIFICATION_WATCHED |
never@3137	86	JVM_ACC_FIELD_INTERNAL,
duke@435	87
duke@435	88	// flags accepted by set_field_flags()
never@3137	89	JVM_ACC_FIELD_FLAGS = JVM_RECOGNIZED_FIELD_MODIFIERS | JVM_ACC_FIELD_INTERNAL_FLAGS
jrose@1145	90
duke@435	91	};
duke@435	92
duke@435	93
duke@435	94	class AccessFlags VALUE_OBJ_CLASS_SPEC {
duke@435	95	friend class VMStructs;
duke@435	96	private:
duke@435	97	jint _flags;
duke@435	98
duke@435	99	public:
duke@435	100	// Java access flags
duke@435	101	bool is_public () const { return (_flags & JVM_ACC_PUBLIC ) != 0; }
duke@435	102	bool is_private () const { return (_flags & JVM_ACC_PRIVATE ) != 0; }
duke@435	103	bool is_protected () const { return (_flags & JVM_ACC_PROTECTED ) != 0; }
duke@435	104	bool is_static () const { return (_flags & JVM_ACC_STATIC ) != 0; }
duke@435	105	bool is_final () const { return (_flags & JVM_ACC_FINAL ) != 0; }
duke@435	106	bool is_synchronized() const { return (_flags & JVM_ACC_SYNCHRONIZED) != 0; }
duke@435	107	bool is_super () const { return (_flags & JVM_ACC_SUPER ) != 0; }
duke@435	108	bool is_volatile () const { return (_flags & JVM_ACC_VOLATILE ) != 0; }
duke@435	109	bool is_transient () const { return (_flags & JVM_ACC_TRANSIENT ) != 0; }
duke@435	110	bool is_native () const { return (_flags & JVM_ACC_NATIVE ) != 0; }
duke@435	111	bool is_interface () const { return (_flags & JVM_ACC_INTERFACE ) != 0; }
duke@435	112	bool is_abstract () const { return (_flags & JVM_ACC_ABSTRACT ) != 0; }
duke@435	113	bool is_strict () const { return (_flags & JVM_ACC_STRICT ) != 0; }
duke@435	114
duke@435	115	// Attribute flags
duke@435	116	bool is_synthetic () const { return (_flags & JVM_ACC_SYNTHETIC ) != 0; }
duke@435	117
duke@435	118	// methodOop flags
duke@435	119	bool is_monitor_matching () const { return (_flags & JVM_ACC_MONITOR_MATCH ) != 0; }
duke@435	120	bool has_monitor_bytecodes () const { return (_flags & JVM_ACC_HAS_MONITOR_BYTECODES ) != 0; }
duke@435	121	bool has_loops () const { return (_flags & JVM_ACC_HAS_LOOPS ) != 0; }
duke@435	122	bool loops_flag_init () const { return (_flags & JVM_ACC_LOOPS_FLAG_INIT ) != 0; }
duke@435	123	bool queued_for_compilation () const { return (_flags & JVM_ACC_QUEUED ) != 0; }
iveresov@2138	124	bool is_not_c1_compilable () const { return (_flags & JVM_ACC_NOT_C1_COMPILABLE ) != 0; }
iveresov@2138	125	bool is_not_c2_compilable () const { return (_flags & JVM_ACC_NOT_C2_COMPILABLE ) != 0; }
duke@435	126	bool is_not_osr_compilable () const { return (_flags & JVM_ACC_NOT_OSR_COMPILABLE ) != 0; }
duke@435	127	bool has_linenumber_table () const { return (_flags & JVM_ACC_HAS_LINE_NUMBER_TABLE ) != 0; }
duke@435	128	bool has_checked_exceptions () const { return (_flags & JVM_ACC_HAS_CHECKED_EXCEPTIONS ) != 0; }
duke@435	129	bool has_jsrs () const { return (_flags & JVM_ACC_HAS_JSRS ) != 0; }
duke@435	130	bool is_old () const { return (_flags & JVM_ACC_IS_OLD ) != 0; }
duke@435	131	bool is_obsolete () const { return (_flags & JVM_ACC_IS_OBSOLETE ) != 0; }
duke@435	132	bool is_prefixed_native () const { return (_flags & JVM_ACC_IS_PREFIXED_NATIVE ) != 0; }
duke@435	133
jrose@1145	134	// JSR 292: A method of the form MethodHandle.invoke(A...)R method is
jrose@1145	135	// neither bytecoded nor a JNI native, but rather a fast call through
jrose@1145	136	// a lightweight method handle object. Because it is not bytecoded,
jrose@1145	137	// it has the native bit set, but the monitor-match bit is also set
jrose@1145	138	// to distinguish it from a JNI native (which never has the match bit set).
jrose@1145	139	// The synthetic bit is also present, because such a method is never
jrose@1145	140	// explicitly defined in Java code.
jrose@1145	141	bool is_method_handle_invoke () const { return (_flags & JVM_MH_INVOKE_BITS) == JVM_MH_INVOKE_BITS; }
jrose@1145	142
duke@435	143	// klassOop flags
duke@435	144	bool has_miranda_methods () const { return (_flags & JVM_ACC_HAS_MIRANDA_METHODS ) != 0; }
duke@435	145	bool has_vanilla_constructor () const { return (_flags & JVM_ACC_HAS_VANILLA_CONSTRUCTOR) != 0; }
duke@435	146	bool has_finalizer () const { return (_flags & JVM_ACC_HAS_FINALIZER ) != 0; }
duke@435	147	bool has_final_method () const { return (_flags & JVM_ACC_HAS_FINAL_METHOD ) != 0; }
duke@435	148	bool is_cloneable () const { return (_flags & JVM_ACC_IS_CLONEABLE ) != 0; }
duke@435	149	// klassOop and methodOop flags
duke@435	150	bool has_localvariable_table () const { return (_flags & JVM_ACC_HAS_LOCAL_VARIABLE_TABLE) != 0; }
duke@435	151	void set_has_localvariable_table() { atomic_set_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); }
duke@435	152	void clear_has_localvariable_table() { atomic_clear_bits(JVM_ACC_HAS_LOCAL_VARIABLE_TABLE); }
duke@435	153
duke@435	154	// field flags
duke@435	155	bool is_field_access_watched() const { return (_flags & JVM_ACC_FIELD_ACCESS_WATCHED) != 0; }
duke@435	156	bool is_field_modification_watched() const
duke@435	157	{ return (_flags & JVM_ACC_FIELD_MODIFICATION_WATCHED) != 0; }
never@3137	158	bool is_internal() const { return (_flags & JVM_ACC_FIELD_INTERNAL) != 0; }
duke@435	159
duke@435	160	// get .class file flags
duke@435	161	jint get_flags () const { return (_flags & JVM_ACC_WRITTEN_FLAGS); }
duke@435	162
duke@435	163	// Initialization
duke@435	164	void add_promoted_flags(jint flags) { _flags |= (flags & JVM_ACC_PROMOTED_FLAGS); }
never@3137	165	void set_field_flags(jint flags) {
never@3137	166	assert((flags & JVM_ACC_FIELD_FLAGS) == flags, "only recognized flags");
never@3137	167	_flags = (flags & JVM_ACC_FIELD_FLAGS);
never@3137	168	}
duke@435	169	void set_flags(jint flags) { _flags = (flags & JVM_ACC_WRITTEN_FLAGS); }
duke@435	170
duke@435	171	void set_queued_for_compilation() { atomic_set_bits(JVM_ACC_QUEUED); }
duke@435	172	void clear_queued_for_compilation() { atomic_clear_bits(JVM_ACC_QUEUED); }
duke@435	173
duke@435	174	// Atomic update of flags
duke@435	175	void atomic_set_bits(jint bits);
duke@435	176	void atomic_clear_bits(jint bits);
duke@435	177
duke@435	178	private:
duke@435	179	friend class methodOopDesc;
duke@435	180	friend class Klass;
duke@435	181	friend class ClassFileParser;
duke@435	182	// the functions below should only be called on the _access_flags inst var directly,
duke@435	183	// otherwise they are just changing a copy of the flags
duke@435	184
duke@435	185	// attribute flags
duke@435	186	void set_is_synthetic() { atomic_set_bits(JVM_ACC_SYNTHETIC); }
duke@435	187
duke@435	188	// methodOop flags
duke@435	189	void set_monitor_matching() { atomic_set_bits(JVM_ACC_MONITOR_MATCH); }
duke@435	190	void set_has_monitor_bytecodes() { atomic_set_bits(JVM_ACC_HAS_MONITOR_BYTECODES); }
duke@435	191	void set_has_loops() { atomic_set_bits(JVM_ACC_HAS_LOOPS); }
duke@435	192	void set_loops_flag_init() { atomic_set_bits(JVM_ACC_LOOPS_FLAG_INIT); }
iveresov@2138	193	void set_not_c1_compilable() { atomic_set_bits(JVM_ACC_NOT_C1_COMPILABLE); }
iveresov@2138	194	void set_not_c2_compilable() { atomic_set_bits(JVM_ACC_NOT_C2_COMPILABLE); }
duke@435	195	void set_not_osr_compilable() { atomic_set_bits(JVM_ACC_NOT_OSR_COMPILABLE); }
duke@435	196	void set_has_linenumber_table() { atomic_set_bits(JVM_ACC_HAS_LINE_NUMBER_TABLE); }
duke@435	197	void set_has_checked_exceptions() { atomic_set_bits(JVM_ACC_HAS_CHECKED_EXCEPTIONS); }
duke@435	198	void set_has_jsrs() { atomic_set_bits(JVM_ACC_HAS_JSRS); }
duke@435	199	void set_is_old() { atomic_set_bits(JVM_ACC_IS_OLD); }
duke@435	200	void set_is_obsolete() { atomic_set_bits(JVM_ACC_IS_OBSOLETE); }
duke@435	201	void set_is_prefixed_native() { atomic_set_bits(JVM_ACC_IS_PREFIXED_NATIVE); }
duke@435	202
duke@435	203	// klassOop flags
duke@435	204	void set_has_vanilla_constructor() { atomic_set_bits(JVM_ACC_HAS_VANILLA_CONSTRUCTOR); }
duke@435	205	void set_has_finalizer() { atomic_set_bits(JVM_ACC_HAS_FINALIZER); }
duke@435	206	void set_has_final_method() { atomic_set_bits(JVM_ACC_HAS_FINAL_METHOD); }
duke@435	207	void set_is_cloneable() { atomic_set_bits(JVM_ACC_IS_CLONEABLE); }
duke@435	208	void set_has_miranda_methods() { atomic_set_bits(JVM_ACC_HAS_MIRANDA_METHODS); }
duke@435	209
duke@435	210	public:
duke@435	211	// field flags
duke@435	212	void set_is_field_access_watched(const bool value)
duke@435	213	{
duke@435	214	if (value) {
duke@435	215	atomic_set_bits(JVM_ACC_FIELD_ACCESS_WATCHED);
duke@435	216	} else {
duke@435	217	atomic_clear_bits(JVM_ACC_FIELD_ACCESS_WATCHED);
duke@435	218	}
duke@435	219	}
duke@435	220	void set_is_field_modification_watched(const bool value)
duke@435	221	{
duke@435	222	if (value) {
duke@435	223	atomic_set_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED);
duke@435	224	} else {
duke@435	225	atomic_clear_bits(JVM_ACC_FIELD_MODIFICATION_WATCHED);
duke@435	226	}
duke@435	227	}
duke@435	228
duke@435	229	// Conversion
never@3137	230	jshort as_short() const { return (jshort)_flags; }
never@3137	231	jint as_int() const { return _flags; }
duke@435	232
jrose@1145	233	inline friend AccessFlags accessFlags_from(jint flags);
jrose@1145	234
duke@435	235	// Printing/debugging
duke@435	236	void print_on(outputStream* st) const PRODUCT_RETURN;
duke@435	237	};
jrose@1145	238
jrose@1145	239	inline AccessFlags accessFlags_from(jint flags) {
jrose@1145	240	AccessFlags af;
jrose@1145	241	af._flags = flags;
jrose@1145	242	return af;
jrose@1145	243	}
stefank@2314	244
stefank@2314	245	#endif // SHARE_VM_UTILITIES_ACCESSFLAGS_HPP