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src/share/vm/ci/ciInstanceKlass.hpp@a61af66fc99e (annotated)

src/share/vm/ci/ciInstanceKlass.hpp

Sat, 01 Dec 2007 00:00:00 +0000

author

duke

date

Sat, 01 Dec 2007 00:00:00 +0000

changeset 435

a61af66fc99e

child 479

52fed2ec0afb

permissions

-rw-r--r--

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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	bool _is_shared;
duke@435	39
duke@435	40	jobject _loader;
duke@435	41	jobject _protection_domain;
duke@435	42
duke@435	43	bool _is_initialized;
duke@435	44	bool _is_linked;
duke@435	45	bool _has_finalizer;
duke@435	46	bool _has_subklass;
duke@435	47	ciFlags _flags;
duke@435	48	jint _nonstatic_field_size;
duke@435	49
duke@435	50	// Lazy fields get filled in only upon request.
duke@435	51	ciInstanceKlass* _super;
duke@435	52	ciInstance* _java_mirror;
duke@435	53
duke@435	54	ciConstantPoolCache* _field_cache; // cached map index->field
duke@435	55	GrowableArray<ciField*>* _nonstatic_fields;
duke@435	56
duke@435	57	enum { implementors_limit = instanceKlass::implementors_limit };
duke@435	58	ciInstanceKlass* _implementors[implementors_limit];
duke@435	59	jint _nof_implementors;
duke@435	60
duke@435	61	protected:
duke@435	62	ciInstanceKlass(KlassHandle h_k);
duke@435	63	ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain);
duke@435	64
duke@435	65	instanceKlass* get_instanceKlass() const {
duke@435	66	return (instanceKlass*)get_Klass();
duke@435	67	}
duke@435	68
duke@435	69	oop loader();
duke@435	70	jobject loader_handle();
duke@435	71
duke@435	72	oop protection_domain();
duke@435	73	jobject protection_domain_handle();
duke@435	74
duke@435	75	const char* type_string() { return "ciInstanceKlass"; }
duke@435	76
duke@435	77	void print_impl(outputStream* st);
duke@435	78
duke@435	79	ciConstantPoolCache* field_cache();
duke@435	80
duke@435	81	bool is_shared() { return _is_shared; }
duke@435	82
duke@435	83	bool compute_shared_is_initialized();
duke@435	84	bool compute_shared_is_linked();
duke@435	85	bool compute_shared_has_subklass();
duke@435	86	int compute_shared_nof_implementors();
duke@435	87	int compute_nonstatic_fields();
duke@435	88	GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
duke@435	89
duke@435	90	public:
duke@435	91	// Has this klass been initialized?
duke@435	92	bool is_initialized() {
duke@435	93	if (_is_shared && !_is_initialized) {
duke@435	94	return is_loaded() && compute_shared_is_initialized();
duke@435	95	}
duke@435	96	return _is_initialized;
duke@435	97	}
duke@435	98	// Has this klass been linked?
duke@435	99	bool is_linked() {
duke@435	100	if (_is_shared && !_is_linked) {
duke@435	101	return is_loaded() && compute_shared_is_linked();
duke@435	102	}
duke@435	103	return _is_linked;
duke@435	104	}
duke@435	105
duke@435	106	// General klass information.
duke@435	107	ciFlags flags() {
duke@435	108	assert(is_loaded(), "must be loaded");
duke@435	109	return _flags;
duke@435	110	}
duke@435	111	bool has_finalizer() {
duke@435	112	assert(is_loaded(), "must be loaded");
duke@435	113	return _has_finalizer; }
duke@435	114	bool has_subklass() {
duke@435	115	assert(is_loaded(), "must be loaded");
duke@435	116	if (_is_shared && !_has_subklass) {
duke@435	117	if (flags().is_final()) {
duke@435	118	return false;
duke@435	119	} else {
duke@435	120	return compute_shared_has_subklass();
duke@435	121	}
duke@435	122	}
duke@435	123	return _has_subklass;
duke@435	124	}
duke@435	125	jint size_helper() {
duke@435	126	return (Klass::layout_helper_size_in_bytes(layout_helper())
duke@435	127	>> LogHeapWordSize);
duke@435	128	}
duke@435	129	jint nonstatic_field_size() {
duke@435	130	assert(is_loaded(), "must be loaded");
duke@435	131	return _nonstatic_field_size; }
duke@435	132	ciInstanceKlass* super();
duke@435	133	jint nof_implementors() {
duke@435	134	assert(is_loaded(), "must be loaded");
duke@435	135	if (_is_shared) return compute_shared_nof_implementors();
duke@435	136	return _nof_implementors;
duke@435	137	}
duke@435	138
duke@435	139	ciInstanceKlass* get_canonical_holder(int offset);
duke@435	140	ciField* get_field_by_offset(int field_offset, bool is_static);
duke@435	141	// total number of nonstatic fields (including inherited):
duke@435	142	int nof_nonstatic_fields() {
duke@435	143	if (_nonstatic_fields == NULL)
duke@435	144	return compute_nonstatic_fields();
duke@435	145	else
duke@435	146	return _nonstatic_fields->length();
duke@435	147	}
duke@435	148	// nth nonstatic field (presented by ascending address)
duke@435	149	ciField* nonstatic_field_at(int i) {
duke@435	150	assert(_nonstatic_fields != NULL, "");
duke@435	151	return _nonstatic_fields->at(i);
duke@435	152	}
duke@435	153
duke@435	154	ciInstanceKlass* unique_concrete_subklass();
duke@435	155	bool has_finalizable_subclass();
duke@435	156
duke@435	157	bool contains_field_offset(int offset) {
duke@435	158	return (offset/wordSize) >= instanceOopDesc::header_size()
duke@435	159	&& (offset/wordSize)-instanceOopDesc::header_size() < nonstatic_field_size();
duke@435	160	}
duke@435	161
duke@435	162	// Get the instance of java.lang.Class corresponding to
duke@435	163	// this klass. This instance is used for locking of
duke@435	164	// synchronized static methods of this klass.
duke@435	165	ciInstance* java_mirror();
duke@435	166
duke@435	167	// Java access flags
duke@435	168	bool is_public () { return flags().is_public(); }
duke@435	169	bool is_final () { return flags().is_final(); }
duke@435	170	bool is_super () { return flags().is_super(); }
duke@435	171	bool is_interface () { return flags().is_interface(); }
duke@435	172	bool is_abstract () { return flags().is_abstract(); }
duke@435	173
duke@435	174	ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
duke@435	175	// Note: To find a method from name and type strings, use ciSymbol::make,
duke@435	176	// but consider adding to vmSymbols.hpp instead.
duke@435	177
duke@435	178	bool is_leaf_type();
duke@435	179	ciInstanceKlass* implementor(int n);
duke@435	180
duke@435	181	// Is the defining class loader of this class the default loader?
duke@435	182	bool uses_default_loader();
duke@435	183
duke@435	184	bool is_java_lang_Object();
duke@435	185
duke@435	186	// What kind of ciObject is this?
duke@435	187	bool is_instance_klass() { return true; }
duke@435	188	bool is_java_klass() { return true; }
duke@435	189	};