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src/share/vm/runtime/reflectionUtils.hpp@c6ff24ceec1c (annotated)

src/share/vm/runtime/reflectionUtils.hpp

Thu, 10 Apr 2008 15:49:16 -0400

author

sbohne

date

Thu, 10 Apr 2008 15:49:16 -0400

changeset 528

c6ff24ceec1c

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6686407: Fix for 6666698 broke -XX:BiasedLockingStartupDelay=0
Summary: Stack allocated VM_EnableBiasedLocking op must be marked as such
Reviewed-by: xlu, acorn, never, dholmes

duke@435	1	/*
duke@435	2	* Copyright 1999-2005 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// A KlassStream is an abstract stream for streaming over self, superclasses
duke@435	26	// and (super)interfaces. Streaming is done in reverse order (subclasses first,
duke@435	27	// interfaces last).
duke@435	28	//
duke@435	29	// for (KlassStream st(k, false, false); !st.eos(); st.next()) {
duke@435	30	// klassOop k = st.klass();
duke@435	31	// ...
duke@435	32	// }
duke@435	33
duke@435	34	class KlassStream VALUE_OBJ_CLASS_SPEC {
duke@435	35	protected:
duke@435	36	instanceKlassHandle _klass; // current klass/interface iterated over
duke@435	37	objArrayHandle _interfaces; // transitive interfaces for initial class
duke@435	38	int _interface_index; // current interface being processed
duke@435	39	bool _local_only; // process initial class/interface only
duke@435	40	bool _classes_only; // process classes only (no interfaces)
duke@435	41	int _index;
duke@435	42
duke@435	43	virtual int length() const = 0;
duke@435	44
duke@435	45	public:
duke@435	46	// constructor
duke@435	47	KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only);
duke@435	48
duke@435	49	// testing
duke@435	50	bool eos();
duke@435	51
duke@435	52	// iterating
duke@435	53	virtual void next() = 0;
duke@435	54
duke@435	55	// accessors
duke@435	56	instanceKlassHandle klass() const { return _klass; }
duke@435	57	int index() const { return _index; }
duke@435	58	};
duke@435	59
duke@435	60
duke@435	61	// A MethodStream streams over all methods in a class, superclasses and (super)interfaces.
duke@435	62	// Streaming is done in reverse order (subclasses first, methods in reverse order)
duke@435	63	// Usage:
duke@435	64	//
duke@435	65	// for (MethodStream st(k, false, false); !st.eos(); st.next()) {
duke@435	66	// methodOop m = st.method();
duke@435	67	// ...
duke@435	68	// }
duke@435	69
duke@435	70	class MethodStream : public KlassStream {
duke@435	71	private:
duke@435	72	int length() const { return methods()->length(); }
duke@435	73	objArrayOop methods() const { return _klass->methods(); }
duke@435	74	public:
duke@435	75	MethodStream(instanceKlassHandle klass, bool local_only, bool classes_only)
duke@435	76	: KlassStream(klass, local_only, classes_only) {
duke@435	77	_index = length();
duke@435	78	next();
duke@435	79	}
duke@435	80
duke@435	81	void next() { _index--; }
duke@435	82	methodOop method() const { return methodOop(methods()->obj_at(index())); }
duke@435	83	};
duke@435	84
duke@435	85
duke@435	86	// A FieldStream streams over all fields in a class, superclasses and (super)interfaces.
duke@435	87	// Streaming is done in reverse order (subclasses first, fields in reverse order)
duke@435	88	// Usage:
duke@435	89	//
duke@435	90	// for (FieldStream st(k, false, false); !st.eos(); st.next()) {
duke@435	91	// symbolOop field_name = st.name();
duke@435	92	// ...
duke@435	93	// }
duke@435	94
duke@435	95
duke@435	96	class FieldStream : public KlassStream {
duke@435	97	private:
duke@435	98	int length() const { return fields()->length(); }
duke@435	99	constantPoolOop constants() const { return _klass->constants(); }
duke@435	100	protected:
duke@435	101	typeArrayOop fields() const { return _klass->fields(); }
duke@435	102	public:
duke@435	103	FieldStream(instanceKlassHandle klass, bool local_only, bool classes_only)
duke@435	104	: KlassStream(klass, local_only, classes_only) {
duke@435	105	_index = length();
duke@435	106	next();
duke@435	107	}
duke@435	108
duke@435	109	void next() { _index -= instanceKlass::next_offset; }
duke@435	110
duke@435	111	// Accessors for current field
duke@435	112	AccessFlags access_flags() const {
duke@435	113	AccessFlags flags;
duke@435	114	flags.set_flags(fields()->ushort_at(index() + instanceKlass::access_flags_offset));
duke@435	115	return flags;
duke@435	116	}
duke@435	117	symbolOop name() const {
duke@435	118	int name_index = fields()->ushort_at(index() + instanceKlass::name_index_offset);
duke@435	119	return constants()->symbol_at(name_index);
duke@435	120	}
duke@435	121	symbolOop signature() const {
duke@435	122	int signature_index = fields()->ushort_at(index() +
duke@435	123	instanceKlass::signature_index_offset);
duke@435	124	return constants()->symbol_at(signature_index);
duke@435	125	}
duke@435	126	// missing: initval()
duke@435	127	int offset() const {
duke@435	128	return _klass->offset_from_fields( index() );
duke@435	129	}
duke@435	130	};
duke@435	131
duke@435	132	class FilteredField {
duke@435	133	private:
duke@435	134	klassOop _klass;
duke@435	135	int _field_offset;
duke@435	136
duke@435	137	public:
duke@435	138	FilteredField(klassOop klass, int field_offset) {
duke@435	139	_klass = klass;
duke@435	140	_field_offset = field_offset;
duke@435	141	}
duke@435	142	klassOop klass() { return _klass; }
duke@435	143	oop* klass_addr() { return (oop*) &_klass; }
duke@435	144	int field_offset() { return _field_offset; }
duke@435	145	};
duke@435	146
duke@435	147	class FilteredFieldsMap : AllStatic {
duke@435	148	private:
duke@435	149	static GrowableArray<FilteredField *> *_filtered_fields;
duke@435	150	public:
duke@435	151	static void initialize();
duke@435	152	static bool is_filtered_field(klassOop klass, int field_offset) {
duke@435	153	for (int i=0; i < _filtered_fields->length(); i++) {
duke@435	154	if (klass == _filtered_fields->at(i)->klass() &&
duke@435	155	field_offset == _filtered_fields->at(i)->field_offset()) {
duke@435	156	return true;
duke@435	157	}
duke@435	158	}
duke@435	159	return false;
duke@435	160	}
duke@435	161	static int filtered_fields_count(klassOop klass, bool local_only) {
duke@435	162	int nflds = 0;
duke@435	163	for (int i=0; i < _filtered_fields->length(); i++) {
duke@435	164	if (local_only && klass == _filtered_fields->at(i)->klass()) {
duke@435	165	nflds++;
duke@435	166	} else if (klass->klass_part()->is_subtype_of(_filtered_fields->at(i)->klass())) {
duke@435	167	nflds++;
duke@435	168	}
duke@435	169	}
duke@435	170	return nflds;
duke@435	171	}
duke@435	172	// GC support.
duke@435	173	static void klasses_oops_do(OopClosure* f) {
duke@435	174	for (int i = 0; i < _filtered_fields->length(); i++) {
duke@435	175	f->do_oop((oop*)_filtered_fields->at(i)->klass_addr());
duke@435	176	}
duke@435	177	}
duke@435	178	};
duke@435	179
duke@435	180
duke@435	181	// A FilteredFieldStream streams over all fields in a class, superclasses and
duke@435	182	// (super)interfaces. Streaming is done in reverse order (subclasses first,
duke@435	183	// fields in reverse order)
duke@435	184	//
duke@435	185	// Usage:
duke@435	186	//
duke@435	187	// for (FilteredFieldStream st(k, false, false); !st.eos(); st.next()) {
duke@435	188	// symbolOop field_name = st.name();
duke@435	189	// ...
duke@435	190	// }
duke@435	191
duke@435	192	class FilteredFieldStream : public FieldStream {
duke@435	193	private:
duke@435	194	int _filtered_fields_count;
duke@435	195	bool has_filtered_field() { return (_filtered_fields_count > 0); }
duke@435	196
duke@435	197	public:
duke@435	198	FilteredFieldStream(instanceKlassHandle klass, bool local_only, bool classes_only)
duke@435	199	: FieldStream(klass, local_only, classes_only) {
duke@435	200	_filtered_fields_count = FilteredFieldsMap::filtered_fields_count((klassOop)klass(), local_only);
duke@435	201	}
duke@435	202	int field_count();
duke@435	203	void next() {
duke@435	204	_index -= instanceKlass::next_offset;
duke@435	205	if (has_filtered_field()) {
duke@435	206	while (_index >=0 && FilteredFieldsMap::is_filtered_field((klassOop)_klass(), offset())) {
duke@435	207	_index -= instanceKlass::next_offset;
duke@435	208	}
duke@435	209	}
duke@435	210	}
duke@435	211	};