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

src/share/vm/ci/ciObjectFactory.hpp@2c6ef90f030a (annotated)

src/share/vm/ci/ciObjectFactory.hpp

Mon, 07 Jul 2014 10:12:40 +0200

author

stefank

date

Mon, 07 Jul 2014 10:12:40 +0200

changeset 6992

2c6ef90f030a

parent 6198

55fb97c4c58d

child 7384

6a528388c7da

permissions

-rw-r--r--

8049421: G1 Class Unloading after completing a concurrent mark cycle
Reviewed-by: tschatzl, ehelin, brutisso, coleenp, roland, iveresov
Contributed-by: stefan.karlsson@oracle.com, mikael.gerdin@oracle.com

duke@435	1	/*
mikael@6198	2	* Copyright (c) 1999, 2013, 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
stefank@2314	25	#ifndef SHARE_VM_CI_CIOBJECTFACTORY_HPP
stefank@2314	26	#define SHARE_VM_CI_CIOBJECTFACTORY_HPP
stefank@2314	27
stefank@2314	28	#include "ci/ciClassList.hpp"
stefank@2314	29	#include "ci/ciObject.hpp"
stefank@2314	30	#include "utilities/growableArray.hpp"
stefank@2314	31
duke@435	32	// ciObjectFactory
duke@435	33	//
duke@435	34	// This class handles requests for the creation of new instances
duke@435	35	// of ciObject and its subclasses. It contains a caching mechanism
duke@435	36	// which ensures that for each oop, at most one ciObject is created.
duke@435	37	// This invariant allows efficient implementation of ciObject.
duke@435	38	class ciObjectFactory : public ResourceObj {
never@3138	39	friend class VMStructs;
never@3138	40	friend class ciEnv;
never@3138	41
duke@435	42	private:
duke@435	43	static volatile bool _initialized;
coleenp@4037	44	static GrowableArray<ciMetadata*>* _shared_ci_metadata;
duke@435	45	static ciSymbol* _shared_ci_symbols[];
duke@435	46	static int _shared_ident_limit;
duke@435	47
duke@435	48	Arena* _arena;
coleenp@4037	49	GrowableArray<ciMetadata*>* _ci_metadata;
duke@435	50	GrowableArray<ciMethod*>* _unloaded_methods;
duke@435	51	GrowableArray<ciKlass*>* _unloaded_klasses;
jrose@1957	52	GrowableArray<ciInstance*>* _unloaded_instances;
duke@435	53	GrowableArray<ciReturnAddress*>* _return_addresses;
coleenp@2497	54	GrowableArray<ciSymbol*>* _symbols; // keep list of symbols created
duke@435	55	int _next_ident;
duke@435	56
duke@435	57	public:
duke@435	58	struct NonPermObject : public ResourceObj {
duke@435	59	ciObject* _object;
duke@435	60	NonPermObject* _next;
duke@435	61
duke@435	62	inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object);
duke@435	63	ciObject* object() { return _object; }
duke@435	64	NonPermObject* &next() { return _next; }
duke@435	65	};
duke@435	66	private:
duke@435	67	enum { NON_PERM_BUCKETS = 61 };
duke@435	68	NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS];
duke@435	69	int _non_perm_count;
duke@435	70
coleenp@4037	71	int find(Metadata* key, GrowableArray<ciMetadata*>* objects);
coleenp@4037	72	bool is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects);
coleenp@4037	73	void insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects);
coleenp@4037	74
duke@435	75	ciObject* create_new_object(oop o);
coleenp@4037	76	ciMetadata* create_new_object(Metadata* o);
coleenp@4037	77
stefank@6992	78	void ensure_metadata_alive(ciMetadata* m);
stefank@6992	79
duke@435	80	static bool is_equal(NonPermObject* p, oop key) {
duke@435	81	return p->object()->get_oop() == key;
duke@435	82	}
duke@435	83
duke@435	84	NonPermObject* &find_non_perm(oop key);
duke@435	85	void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj);
duke@435	86
coleenp@4037	87	void init_ident_of(ciBaseObject* obj);
duke@435	88
duke@435	89	Arena* arena() { return _arena; }
duke@435	90
duke@435	91	void print_contents_impl();
duke@435	92
jrose@1957	93	ciInstance* get_unloaded_instance(ciInstanceKlass* klass);
jrose@1957	94
duke@435	95	public:
duke@435	96	static bool is_initialized() { return _initialized; }
duke@435	97
duke@435	98	static void initialize();
duke@435	99	void init_shared_objects();
coleenp@2497	100	void remove_symbols();
duke@435	101
duke@435	102	ciObjectFactory(Arena* arena, int expected_size);
duke@435	103
duke@435	104	// Get the ciObject corresponding to some oop.
duke@435	105	ciObject* get(oop key);
coleenp@4037	106	ciMetadata* get_metadata(Metadata* key);
coleenp@2497	107	ciSymbol* get_symbol(Symbol* key);
coleenp@2497	108
duke@435	109	// Get the ciSymbol corresponding to one of the vmSymbols.
duke@435	110	static ciSymbol* vm_symbol_at(int index);
duke@435	111
duke@435	112	// Get the ciMethod representing an unloaded/unfound method.
duke@435	113	ciMethod* get_unloaded_method(ciInstanceKlass* holder,
duke@435	114	ciSymbol* name,
twisti@3197	115	ciSymbol* signature,
twisti@3197	116	ciInstanceKlass* accessor);
duke@435	117
duke@435	118	// Get a ciKlass representing an unloaded klass.
duke@435	119	ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
duke@435	120	ciSymbol* name,
duke@435	121	bool create_if_not_found);
duke@435	122
jrose@1957	123	// Get a ciInstance representing an unresolved klass mirror.
jrose@1957	124	ciInstance* get_unloaded_klass_mirror(ciKlass* type);
jrose@1957	125
jrose@1957	126	// Get a ciInstance representing an unresolved method handle constant.
jrose@1957	127	ciInstance* get_unloaded_method_handle_constant(ciKlass* holder,
jrose@1957	128	ciSymbol* name,
jrose@1957	129	ciSymbol* signature,
jrose@1957	130	int ref_kind);
jrose@1957	131
jrose@1957	132	// Get a ciInstance representing an unresolved method type constant.
jrose@1957	133	ciInstance* get_unloaded_method_type_constant(ciSymbol* signature);
jrose@1957	134
duke@435	135
roland@5628	136	ciInstance* get_unloaded_object_constant();
roland@5628	137
duke@435	138	// Get the ciMethodData representing the methodData for a method
duke@435	139	// with none.
duke@435	140	ciMethodData* get_empty_methodData();
duke@435	141
duke@435	142	ciReturnAddress* get_return_address(int bci);
duke@435	143
minqi@4267	144	GrowableArray<ciMetadata*>* get_ci_metadata() const { return _ci_metadata; }
coleenp@4037	145	// RedefineClasses support
coleenp@4037	146	void metadata_do(void f(Metadata*));
coleenp@4037	147
duke@435	148	void print_contents();
duke@435	149	void print();
duke@435	150	};
stefank@2314	151
stefank@2314	152	#endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP