• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/oops/fieldStreams.hpp@e6b1331a51d2 (annotated)

src/share/vm/oops/fieldStreams.hpp

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

author

never

date

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

changeset 3137

e6b1331a51d2

child 3803

71afdabfd05b

permissions

-rw-r--r--

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

never@3137	1	/*
never@3137	2	* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
never@3137	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@3137	4	*
never@3137	5	* This code is free software; you can redistribute it and/or modify it
never@3137	6	* under the terms of the GNU General Public License version 2 only, as
never@3137	7	* published by the Free Software Foundation.
never@3137	8	*
never@3137	9	* This code is distributed in the hope that it will be useful, but WITHOUT
never@3137	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@3137	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@3137	12	* version 2 for more details (a copy is included in the LICENSE file that
never@3137	13	* accompanied this code).
never@3137	14	*
never@3137	15	* You should have received a copy of the GNU General Public License version
never@3137	16	* 2 along with this work; if not, write to the Free Software Foundation,
never@3137	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@3137	18	*
never@3137	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
never@3137	20	* or visit www.oracle.com if you need additional information or have any
never@3137	21	* questions.
never@3137	22	*
never@3137	23	*/
never@3137	24
never@3137	25	#ifndef SHARE_VM_OOPS_FIELDSTREAMS_HPP
never@3137	26	#define SHARE_VM_OOPS_FIELDSTREAMS_HPP
never@3137	27
never@3137	28	#include "oops/instanceKlass.hpp"
never@3137	29	#include "oops/fieldInfo.hpp"
never@3137	30
never@3137	31	// The is the base class for iteration over the fields array
never@3137	32	// describing the declared fields in the class. Several subclasses
never@3137	33	// are provided depending on the kind of iteration required. The
never@3137	34	// JavaFieldStream is for iterating over regular Java fields and it
never@3137	35	// generally the preferred iterator. InternalFieldStream only
never@3137	36	// iterates over fields that have been injected by the JVM.
never@3137	37	// AllFieldStream exposes all fields and should only be used in rare
never@3137	38	// cases.
never@3137	39	class FieldStreamBase : public StackObj {
never@3137	40	protected:
never@3137	41	typeArrayHandle _fields;
never@3137	42	constantPoolHandle _constants;
never@3137	43	int _index;
never@3137	44	int _limit;
never@3137	45
never@3137	46	FieldInfo* field() const { return FieldInfo::from_field_array(_fields(), _index); }
never@3137	47
never@3137	48	FieldStreamBase(typeArrayHandle fields, constantPoolHandle constants, int start, int limit) {
never@3137	49	_fields = fields;
never@3137	50	_constants = constants;
never@3137	51	_index = start;
never@3137	52	_limit = limit;
never@3137	53	}
never@3137	54
never@3137	55	FieldStreamBase(typeArrayHandle fields, constantPoolHandle constants) {
never@3137	56	_fields = fields;
never@3137	57	_constants = constants;
never@3137	58	_index = 0;
never@3137	59	_limit = fields->length() / FieldInfo::field_slots;
never@3137	60	}
never@3137	61
never@3137	62	public:
never@3137	63	FieldStreamBase(instanceKlass* klass) {
never@3137	64	_fields = klass->fields();
never@3137	65	_constants = klass->constants();
never@3137	66	_index = 0;
never@3137	67	_limit = klass->java_fields_count();
never@3137	68	}
never@3137	69	FieldStreamBase(instanceKlassHandle klass) {
never@3137	70	_fields = klass->fields();
never@3137	71	_constants = klass->constants();
never@3137	72	_index = 0;
never@3137	73	_limit = klass->java_fields_count();
never@3137	74	}
never@3137	75
never@3137	76	// accessors
never@3137	77	int index() const { return _index; }
never@3137	78
never@3137	79	void next() { _index += 1; }
never@3137	80	bool done() const { return _index >= _limit; }
never@3137	81
never@3137	82	// Accessors for current field
never@3137	83	AccessFlags access_flags() const {
never@3137	84	AccessFlags flags;
never@3137	85	flags.set_flags(field()->access_flags());
never@3137	86	return flags;
never@3137	87	}
never@3137	88
never@3137	89	void set_access_flags(u2 flags) const {
never@3137	90	field()->set_access_flags(flags);
never@3137	91	}
never@3137	92
never@3137	93	void set_access_flags(AccessFlags flags) const {
never@3137	94	set_access_flags(flags.as_short());
never@3137	95	}
never@3137	96
never@3137	97	Symbol* name() const {
never@3137	98	return field()->name(_constants);
never@3137	99	}
never@3137	100
never@3137	101	Symbol* signature() const {
never@3137	102	return field()->signature(_constants);
never@3137	103	}
never@3137	104
never@3137	105	Symbol* generic_signature() const {
never@3137	106	return field()->generic_signature(_constants);
never@3137	107	}
never@3137	108
never@3137	109	int offset() const {
never@3137	110	return field()->offset();
never@3137	111	}
never@3137	112
never@3137	113	void set_offset(int offset) {
never@3137	114	field()->set_offset(offset);
never@3137	115	}
never@3137	116	};
never@3137	117
never@3137	118	// Iterate over only the internal fields
never@3137	119	class JavaFieldStream : public FieldStreamBase {
never@3137	120	public:
never@3137	121	JavaFieldStream(instanceKlass* k): FieldStreamBase(k->fields(), k->constants(), 0, k->java_fields_count()) {}
never@3137	122	JavaFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants(), 0, k->java_fields_count()) {}
never@3137	123
never@3137	124	int name_index() const {
never@3137	125	assert(!field()->is_internal(), "regular only");
never@3137	126	return field()->name_index();
never@3137	127	}
never@3137	128	void set_name_index(int index) {
never@3137	129	assert(!field()->is_internal(), "regular only");
never@3137	130	field()->set_name_index(index);
never@3137	131	}
never@3137	132	int signature_index() const {
never@3137	133	assert(!field()->is_internal(), "regular only");
never@3137	134	return field()->signature_index();
never@3137	135	}
never@3137	136	void set_signature_index(int index) {
never@3137	137	assert(!field()->is_internal(), "regular only");
never@3137	138	field()->set_signature_index(index);
never@3137	139	}
never@3137	140	int generic_signature_index() const {
never@3137	141	assert(!field()->is_internal(), "regular only");
never@3137	142	return field()->generic_signature_index();
never@3137	143	}
never@3137	144	void set_generic_signature_index(int index) {
never@3137	145	assert(!field()->is_internal(), "regular only");
never@3137	146	field()->set_generic_signature_index(index);
never@3137	147	}
never@3137	148	int initval_index() const {
never@3137	149	assert(!field()->is_internal(), "regular only");
never@3137	150	return field()->initval_index();
never@3137	151	}
never@3137	152	void set_initval_index(int index) {
never@3137	153	assert(!field()->is_internal(), "regular only");
never@3137	154	return field()->set_initval_index(index);
never@3137	155	}
never@3137	156	};
never@3137	157
never@3137	158
never@3137	159	// Iterate over only the internal fields
never@3137	160	class InternalFieldStream : public FieldStreamBase {
never@3137	161	public:
never@3137	162	InternalFieldStream(instanceKlass* k): FieldStreamBase(k->fields(), k->constants(), k->java_fields_count(), k->all_fields_count()) {}
never@3137	163	InternalFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants(), k->java_fields_count(), k->all_fields_count()) {}
never@3137	164	};
never@3137	165
never@3137	166
never@3137	167	class AllFieldStream : public FieldStreamBase {
never@3137	168	public:
never@3137	169	AllFieldStream(typeArrayHandle fields, constantPoolHandle constants): FieldStreamBase(fields, constants) {}
never@3137	170	AllFieldStream(instanceKlass* k): FieldStreamBase(k->fields(), k->constants()) {}
never@3137	171	AllFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants()) {}
never@3137	172	};
never@3137	173
never@3137	174	#endif // SHARE_VM_OOPS_FIELDSTREAMS_HPP