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src/share/vm/ci/ciInstanceKlass.hpp@ba764ed4b6f2 (annotated)

src/share/vm/ci/ciInstanceKlass.hpp

Sun, 13 Apr 2008 17:43:42 -0400

author

coleenp

date

Sun, 13 Apr 2008 17:43:42 -0400

changeset 548

ba764ed4b6f2

parent 479

52fed2ec0afb

child 631

d1605aabd0a1

permissions

-rw-r--r--

6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold

duke@435	1	/*
duke@435	2	* Copyright 1999-2007 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	// ciInstanceKlass
duke@435	26	//
duke@435	27	// This class represents a klassOop in the HotSpot virtual machine
duke@435	28	// whose Klass part is an instanceKlass. It may or may not
duke@435	29	// be loaded.
duke@435	30	class ciInstanceKlass : public ciKlass {
duke@435	31	CI_PACKAGE_ACCESS
duke@435	32	friend class ciEnv;
duke@435	33	friend class ciMethod;
duke@435	34	friend class ciField;
duke@435	35	friend class ciBytecodeStream;
duke@435	36
duke@435	37	private:
duke@435	38	jobject _loader;
duke@435	39	jobject _protection_domain;
duke@435	40
coleenp@548	41	bool _is_shared;
duke@435	42	bool _is_initialized;
duke@435	43	bool _is_linked;
duke@435	44	bool _has_finalizer;
duke@435	45	bool _has_subklass;
coleenp@548	46	bool _has_nonstatic_fields;
coleenp@548	47
duke@435	48	ciFlags _flags;
duke@435	49	jint _nonstatic_field_size;
kvn@479	50	jint _nonstatic_oop_map_size;
duke@435	51
duke@435	52	// Lazy fields get filled in only upon request.
duke@435	53	ciInstanceKlass* _super;
duke@435	54	ciInstance* _java_mirror;
duke@435	55
duke@435	56	ciConstantPoolCache* _field_cache; // cached map index->field
duke@435	57	GrowableArray<ciField*>* _nonstatic_fields;
duke@435	58
duke@435	59	enum { implementors_limit = instanceKlass::implementors_limit };
duke@435	60	ciInstanceKlass* _implementors[implementors_limit];
duke@435	61	jint _nof_implementors;
duke@435	62
kvn@479	63	GrowableArray<ciField*>* _non_static_fields;
kvn@479	64
duke@435	65	protected:
duke@435	66	ciInstanceKlass(KlassHandle h_k);
duke@435	67	ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain);
duke@435	68
duke@435	69	instanceKlass* get_instanceKlass() const {
duke@435	70	return (instanceKlass*)get_Klass();
duke@435	71	}
duke@435	72
duke@435	73	oop loader();
duke@435	74	jobject loader_handle();
duke@435	75
duke@435	76	oop protection_domain();
duke@435	77	jobject protection_domain_handle();
duke@435	78
duke@435	79	const char* type_string() { return "ciInstanceKlass"; }
duke@435	80
duke@435	81	void print_impl(outputStream* st);
duke@435	82
duke@435	83	ciConstantPoolCache* field_cache();
duke@435	84
duke@435	85	bool is_shared() { return _is_shared; }
duke@435	86
duke@435	87	bool compute_shared_is_initialized();
duke@435	88	bool compute_shared_is_linked();
duke@435	89	bool compute_shared_has_subklass();
duke@435	90	int compute_shared_nof_implementors();
duke@435	91	int compute_nonstatic_fields();
duke@435	92	GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
duke@435	93
duke@435	94	public:
duke@435	95	// Has this klass been initialized?
duke@435	96	bool is_initialized() {
duke@435	97	if (_is_shared && !_is_initialized) {
duke@435	98	return is_loaded() && compute_shared_is_initialized();
duke@435	99	}
duke@435	100	return _is_initialized;
duke@435	101	}
duke@435	102	// Has this klass been linked?
duke@435	103	bool is_linked() {
duke@435	104	if (_is_shared && !_is_linked) {
duke@435	105	return is_loaded() && compute_shared_is_linked();
duke@435	106	}
duke@435	107	return _is_linked;
duke@435	108	}
duke@435	109
duke@435	110	// General klass information.
duke@435	111	ciFlags flags() {
duke@435	112	assert(is_loaded(), "must be loaded");
duke@435	113	return _flags;
duke@435	114	}
duke@435	115	bool has_finalizer() {
duke@435	116	assert(is_loaded(), "must be loaded");
duke@435	117	return _has_finalizer; }
duke@435	118	bool has_subklass() {
duke@435	119	assert(is_loaded(), "must be loaded");
duke@435	120	if (_is_shared && !_has_subklass) {
duke@435	121	if (flags().is_final()) {
duke@435	122	return false;
duke@435	123	} else {
duke@435	124	return compute_shared_has_subklass();
duke@435	125	}
duke@435	126	}
duke@435	127	return _has_subklass;
duke@435	128	}
duke@435	129	jint size_helper() {
duke@435	130	return (Klass::layout_helper_size_in_bytes(layout_helper())
duke@435	131	>> LogHeapWordSize);
duke@435	132	}
duke@435	133	jint nonstatic_field_size() {
duke@435	134	assert(is_loaded(), "must be loaded");
duke@435	135	return _nonstatic_field_size; }
coleenp@548	136	jint has_nonstatic_fields() {
coleenp@548	137	assert(is_loaded(), "must be loaded");
coleenp@548	138	return _has_nonstatic_fields; }
kvn@479	139	jint nonstatic_oop_map_size() {
kvn@479	140	assert(is_loaded(), "must be loaded");
kvn@479	141	return _nonstatic_oop_map_size; }
duke@435	142	ciInstanceKlass* super();
duke@435	143	jint nof_implementors() {
duke@435	144	assert(is_loaded(), "must be loaded");
duke@435	145	if (_is_shared) return compute_shared_nof_implementors();
duke@435	146	return _nof_implementors;
duke@435	147	}
duke@435	148
duke@435	149	ciInstanceKlass* get_canonical_holder(int offset);
duke@435	150	ciField* get_field_by_offset(int field_offset, bool is_static);
kvn@479	151
kvn@479	152	GrowableArray<ciField*>* non_static_fields();
kvn@479	153
duke@435	154	// total number of nonstatic fields (including inherited):
duke@435	155	int nof_nonstatic_fields() {
duke@435	156	if (_nonstatic_fields == NULL)
duke@435	157	return compute_nonstatic_fields();
duke@435	158	else
duke@435	159	return _nonstatic_fields->length();
duke@435	160	}
duke@435	161	// nth nonstatic field (presented by ascending address)
duke@435	162	ciField* nonstatic_field_at(int i) {
duke@435	163	assert(_nonstatic_fields != NULL, "");
duke@435	164	return _nonstatic_fields->at(i);
duke@435	165	}
duke@435	166
duke@435	167	ciInstanceKlass* unique_concrete_subklass();
duke@435	168	bool has_finalizable_subclass();
duke@435	169
duke@435	170	bool contains_field_offset(int offset) {
coleenp@548	171	return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size());
duke@435	172	}
duke@435	173
duke@435	174	// Get the instance of java.lang.Class corresponding to
duke@435	175	// this klass. This instance is used for locking of
duke@435	176	// synchronized static methods of this klass.
duke@435	177	ciInstance* java_mirror();
duke@435	178
duke@435	179	// Java access flags
duke@435	180	bool is_public () { return flags().is_public(); }
duke@435	181	bool is_final () { return flags().is_final(); }
duke@435	182	bool is_super () { return flags().is_super(); }
duke@435	183	bool is_interface () { return flags().is_interface(); }
duke@435	184	bool is_abstract () { return flags().is_abstract(); }
duke@435	185
duke@435	186	ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
duke@435	187	// Note: To find a method from name and type strings, use ciSymbol::make,
duke@435	188	// but consider adding to vmSymbols.hpp instead.
duke@435	189
duke@435	190	bool is_leaf_type();
duke@435	191	ciInstanceKlass* implementor(int n);
duke@435	192
duke@435	193	// Is the defining class loader of this class the default loader?
duke@435	194	bool uses_default_loader();
duke@435	195
duke@435	196	bool is_java_lang_Object();
duke@435	197
duke@435	198	// What kind of ciObject is this?
duke@435	199	bool is_instance_klass() { return true; }
duke@435	200	bool is_java_klass() { return true; }
duke@435	201	};