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

src/share/vm/ci/ciInstanceKlass.hpp@3941674cc7fa (annotated)

src/share/vm/ci/ciInstanceKlass.hpp

Mon, 12 Jul 2010 10:58:25 -0700

author

never

date

Mon, 12 Jul 2010 10:58:25 -0700

changeset 2000

3941674cc7fa

parent 1907

c18cbe5936b8

child 2314

f95d63e2154a

permissions

-rw-r--r--

6958668: repeated uncommon trapping for new of klass which is being initialized
Reviewed-by: kvn, jrose

duke@435	1	/*
never@2000	2	* Copyright (c) 1999, 2010, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* 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
never@2000	42	instanceKlass::ClassState _init_state; // state of class
coleenp@548	43	bool _is_shared;
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
twisti@1573	81	bool is_in_package_impl(const char* packagename, int len);
twisti@1573	82
duke@435	83	void print_impl(outputStream* st);
duke@435	84
duke@435	85	ciConstantPoolCache* field_cache();
duke@435	86
duke@435	87	bool is_shared() { return _is_shared; }
duke@435	88
never@2000	89	void compute_shared_init_state();
duke@435	90	bool compute_shared_has_subklass();
duke@435	91	int compute_shared_nof_implementors();
duke@435	92	int compute_nonstatic_fields();
duke@435	93	GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
duke@435	94
never@2000	95	// Update the init_state for shared klasses
never@2000	96	void update_if_shared(instanceKlass::ClassState expected) {
never@2000	97	if (_is_shared && _init_state != expected) {
never@2000	98	if (is_loaded()) compute_shared_init_state();
never@2000	99	}
never@2000	100	}
never@2000	101
duke@435	102	public:
duke@435	103	// Has this klass been initialized?
duke@435	104	bool is_initialized() {
never@2000	105	update_if_shared(instanceKlass::fully_initialized);
never@2000	106	return _init_state == instanceKlass::fully_initialized;
never@2000	107	}
never@2000	108	// Is this klass being initialized?
never@2000	109	bool is_being_initialized() {
never@2000	110	update_if_shared(instanceKlass::being_initialized);
never@2000	111	return _init_state == instanceKlass::being_initialized;
duke@435	112	}
duke@435	113	// Has this klass been linked?
duke@435	114	bool is_linked() {
never@2000	115	update_if_shared(instanceKlass::linked);
never@2000	116	return _init_state >= instanceKlass::linked;
duke@435	117	}
duke@435	118
duke@435	119	// General klass information.
duke@435	120	ciFlags flags() {
duke@435	121	assert(is_loaded(), "must be loaded");
duke@435	122	return _flags;
duke@435	123	}
duke@435	124	bool has_finalizer() {
duke@435	125	assert(is_loaded(), "must be loaded");
duke@435	126	return _has_finalizer; }
duke@435	127	bool has_subklass() {
duke@435	128	assert(is_loaded(), "must be loaded");
duke@435	129	if (_is_shared && !_has_subklass) {
duke@435	130	if (flags().is_final()) {
duke@435	131	return false;
duke@435	132	} else {
duke@435	133	return compute_shared_has_subklass();
duke@435	134	}
duke@435	135	}
duke@435	136	return _has_subklass;
duke@435	137	}
duke@435	138	jint size_helper() {
duke@435	139	return (Klass::layout_helper_size_in_bytes(layout_helper())
duke@435	140	>> LogHeapWordSize);
duke@435	141	}
duke@435	142	jint nonstatic_field_size() {
duke@435	143	assert(is_loaded(), "must be loaded");
duke@435	144	return _nonstatic_field_size; }
coleenp@548	145	jint has_nonstatic_fields() {
coleenp@548	146	assert(is_loaded(), "must be loaded");
coleenp@548	147	return _has_nonstatic_fields; }
kvn@479	148	jint nonstatic_oop_map_size() {
kvn@479	149	assert(is_loaded(), "must be loaded");
kvn@479	150	return _nonstatic_oop_map_size; }
duke@435	151	ciInstanceKlass* super();
duke@435	152	jint nof_implementors() {
duke@435	153	assert(is_loaded(), "must be loaded");
duke@435	154	if (_is_shared) return compute_shared_nof_implementors();
duke@435	155	return _nof_implementors;
duke@435	156	}
duke@435	157
duke@435	158	ciInstanceKlass* get_canonical_holder(int offset);
duke@435	159	ciField* get_field_by_offset(int field_offset, bool is_static);
never@1515	160	ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
kvn@479	161
kvn@479	162	GrowableArray<ciField*>* non_static_fields();
kvn@479	163
duke@435	164	// total number of nonstatic fields (including inherited):
duke@435	165	int nof_nonstatic_fields() {
duke@435	166	if (_nonstatic_fields == NULL)
duke@435	167	return compute_nonstatic_fields();
duke@435	168	else
duke@435	169	return _nonstatic_fields->length();
duke@435	170	}
duke@435	171	// nth nonstatic field (presented by ascending address)
duke@435	172	ciField* nonstatic_field_at(int i) {
duke@435	173	assert(_nonstatic_fields != NULL, "");
duke@435	174	return _nonstatic_fields->at(i);
duke@435	175	}
duke@435	176
duke@435	177	ciInstanceKlass* unique_concrete_subklass();
duke@435	178	bool has_finalizable_subclass();
duke@435	179
duke@435	180	bool contains_field_offset(int offset) {
coleenp@548	181	return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size());
duke@435	182	}
duke@435	183
duke@435	184	// Get the instance of java.lang.Class corresponding to
duke@435	185	// this klass. This instance is used for locking of
duke@435	186	// synchronized static methods of this klass.
duke@435	187	ciInstance* java_mirror();
duke@435	188
duke@435	189	// Java access flags
duke@435	190	bool is_public () { return flags().is_public(); }
duke@435	191	bool is_final () { return flags().is_final(); }
duke@435	192	bool is_super () { return flags().is_super(); }
duke@435	193	bool is_interface () { return flags().is_interface(); }
duke@435	194	bool is_abstract () { return flags().is_abstract(); }
duke@435	195
duke@435	196	ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
duke@435	197	// Note: To find a method from name and type strings, use ciSymbol::make,
duke@435	198	// but consider adding to vmSymbols.hpp instead.
duke@435	199
duke@435	200	bool is_leaf_type();
duke@435	201	ciInstanceKlass* implementor(int n);
duke@435	202
duke@435	203	// Is the defining class loader of this class the default loader?
duke@435	204	bool uses_default_loader();
duke@435	205
duke@435	206	bool is_java_lang_Object();
duke@435	207
twisti@1573	208	// Is this klass in the given package?
twisti@1573	209	bool is_in_package(const char* packagename) {
twisti@1573	210	return is_in_package(packagename, (int) strlen(packagename));
twisti@1573	211	}
twisti@1573	212	bool is_in_package(const char* packagename, int len);
twisti@1573	213
duke@435	214	// What kind of ciObject is this?
duke@435	215	bool is_instance_klass() { return true; }
duke@435	216	bool is_java_klass() { return true; }
duke@435	217	};