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src/share/vm/ci/ciInstanceKlass.hpp@dd57230ba8fe (annotated)

src/share/vm/ci/ciInstanceKlass.hpp

Tue, 05 Jan 2010 15:21:25 +0100

author

twisti

date

Tue, 05 Jan 2010 15:21:25 +0100

changeset 1573

dd57230ba8fe

parent 1515

7c57aead6d3e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6893268: additional dynamic language related optimizations in C2
Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance.
Reviewed-by: kvn, never

duke@435	1	/*
xdono@631	2	* Copyright 1999-2008 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
twisti@1573	32	friend class ciBytecodeStream;
duke@435	33	friend class ciEnv;
twisti@1573	34	friend class ciExceptionHandler;
duke@435	35	friend class ciMethod;
duke@435	36	friend class ciField;
duke@435	37
duke@435	38	private:
duke@435	39	jobject _loader;
duke@435	40	jobject _protection_domain;
duke@435	41
coleenp@548	42	bool _is_shared;
duke@435	43	bool _is_initialized;
duke@435	44	bool _is_linked;
duke@435	45	bool _has_finalizer;
duke@435	46	bool _has_subklass;
coleenp@548	47	bool _has_nonstatic_fields;
coleenp@548	48
duke@435	49	ciFlags _flags;
duke@435	50	jint _nonstatic_field_size;
kvn@479	51	jint _nonstatic_oop_map_size;
duke@435	52
duke@435	53	// Lazy fields get filled in only upon request.
duke@435	54	ciInstanceKlass* _super;
duke@435	55	ciInstance* _java_mirror;
duke@435	56
duke@435	57	ciConstantPoolCache* _field_cache; // cached map index->field
duke@435	58	GrowableArray<ciField*>* _nonstatic_fields;
duke@435	59
duke@435	60	enum { implementors_limit = instanceKlass::implementors_limit };
duke@435	61	ciInstanceKlass* _implementors[implementors_limit];
duke@435	62	jint _nof_implementors;
duke@435	63
kvn@479	64	GrowableArray<ciField*>* _non_static_fields;
kvn@479	65
duke@435	66	protected:
duke@435	67	ciInstanceKlass(KlassHandle h_k);
duke@435	68	ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain);
duke@435	69
duke@435	70	instanceKlass* get_instanceKlass() const {
duke@435	71	return (instanceKlass*)get_Klass();
duke@435	72	}
duke@435	73
duke@435	74	oop loader();
duke@435	75	jobject loader_handle();
duke@435	76
duke@435	77	oop protection_domain();
duke@435	78	jobject protection_domain_handle();
duke@435	79
duke@435	80	const char* type_string() { return "ciInstanceKlass"; }
duke@435	81
twisti@1573	82	bool is_in_package_impl(const char* packagename, int len);
twisti@1573	83
duke@435	84	void print_impl(outputStream* st);
duke@435	85
duke@435	86	ciConstantPoolCache* field_cache();
duke@435	87
duke@435	88	bool is_shared() { return _is_shared; }
duke@435	89
duke@435	90	bool compute_shared_is_initialized();
duke@435	91	bool compute_shared_is_linked();
duke@435	92	bool compute_shared_has_subklass();
duke@435	93	int compute_shared_nof_implementors();
duke@435	94	int compute_nonstatic_fields();
duke@435	95	GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
duke@435	96
duke@435	97	public:
duke@435	98	// Has this klass been initialized?
duke@435	99	bool is_initialized() {
duke@435	100	if (_is_shared && !_is_initialized) {
duke@435	101	return is_loaded() && compute_shared_is_initialized();
duke@435	102	}
duke@435	103	return _is_initialized;
duke@435	104	}
duke@435	105	// Has this klass been linked?
duke@435	106	bool is_linked() {
duke@435	107	if (_is_shared && !_is_linked) {
duke@435	108	return is_loaded() && compute_shared_is_linked();
duke@435	109	}
duke@435	110	return _is_linked;
duke@435	111	}
duke@435	112
duke@435	113	// General klass information.
duke@435	114	ciFlags flags() {
duke@435	115	assert(is_loaded(), "must be loaded");
duke@435	116	return _flags;
duke@435	117	}
duke@435	118	bool has_finalizer() {
duke@435	119	assert(is_loaded(), "must be loaded");
duke@435	120	return _has_finalizer; }
duke@435	121	bool has_subklass() {
duke@435	122	assert(is_loaded(), "must be loaded");
duke@435	123	if (_is_shared && !_has_subklass) {
duke@435	124	if (flags().is_final()) {
duke@435	125	return false;
duke@435	126	} else {
duke@435	127	return compute_shared_has_subklass();
duke@435	128	}
duke@435	129	}
duke@435	130	return _has_subklass;
duke@435	131	}
duke@435	132	jint size_helper() {
duke@435	133	return (Klass::layout_helper_size_in_bytes(layout_helper())
duke@435	134	>> LogHeapWordSize);
duke@435	135	}
duke@435	136	jint nonstatic_field_size() {
duke@435	137	assert(is_loaded(), "must be loaded");
duke@435	138	return _nonstatic_field_size; }
coleenp@548	139	jint has_nonstatic_fields() {
coleenp@548	140	assert(is_loaded(), "must be loaded");
coleenp@548	141	return _has_nonstatic_fields; }
kvn@479	142	jint nonstatic_oop_map_size() {
kvn@479	143	assert(is_loaded(), "must be loaded");
kvn@479	144	return _nonstatic_oop_map_size; }
duke@435	145	ciInstanceKlass* super();
duke@435	146	jint nof_implementors() {
duke@435	147	assert(is_loaded(), "must be loaded");
duke@435	148	if (_is_shared) return compute_shared_nof_implementors();
duke@435	149	return _nof_implementors;
duke@435	150	}
duke@435	151
duke@435	152	ciInstanceKlass* get_canonical_holder(int offset);
duke@435	153	ciField* get_field_by_offset(int field_offset, bool is_static);
never@1515	154	ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
kvn@479	155
kvn@479	156	GrowableArray<ciField*>* non_static_fields();
kvn@479	157
duke@435	158	// total number of nonstatic fields (including inherited):
duke@435	159	int nof_nonstatic_fields() {
duke@435	160	if (_nonstatic_fields == NULL)
duke@435	161	return compute_nonstatic_fields();
duke@435	162	else
duke@435	163	return _nonstatic_fields->length();
duke@435	164	}
duke@435	165	// nth nonstatic field (presented by ascending address)
duke@435	166	ciField* nonstatic_field_at(int i) {
duke@435	167	assert(_nonstatic_fields != NULL, "");
duke@435	168	return _nonstatic_fields->at(i);
duke@435	169	}
duke@435	170
duke@435	171	ciInstanceKlass* unique_concrete_subklass();
duke@435	172	bool has_finalizable_subclass();
duke@435	173
duke@435	174	bool contains_field_offset(int offset) {
coleenp@548	175	return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size());
duke@435	176	}
duke@435	177
duke@435	178	// Get the instance of java.lang.Class corresponding to
duke@435	179	// this klass. This instance is used for locking of
duke@435	180	// synchronized static methods of this klass.
duke@435	181	ciInstance* java_mirror();
duke@435	182
duke@435	183	// Java access flags
duke@435	184	bool is_public () { return flags().is_public(); }
duke@435	185	bool is_final () { return flags().is_final(); }
duke@435	186	bool is_super () { return flags().is_super(); }
duke@435	187	bool is_interface () { return flags().is_interface(); }
duke@435	188	bool is_abstract () { return flags().is_abstract(); }
duke@435	189
duke@435	190	ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
duke@435	191	// Note: To find a method from name and type strings, use ciSymbol::make,
duke@435	192	// but consider adding to vmSymbols.hpp instead.
duke@435	193
duke@435	194	bool is_leaf_type();
duke@435	195	ciInstanceKlass* implementor(int n);
duke@435	196
duke@435	197	// Is the defining class loader of this class the default loader?
duke@435	198	bool uses_default_loader();
duke@435	199
duke@435	200	bool is_java_lang_Object();
duke@435	201
twisti@1573	202	// Is this klass in the given package?
twisti@1573	203	bool is_in_package(const char* packagename) {
twisti@1573	204	return is_in_package(packagename, (int) strlen(packagename));
twisti@1573	205	}
twisti@1573	206	bool is_in_package(const char* packagename, int len);
twisti@1573	207
duke@435	208	// What kind of ciObject is this?
duke@435	209	bool is_instance_klass() { return true; }
duke@435	210	bool is_java_klass() { return true; }
duke@435	211	};