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src/share/vm/ci/ciObjectFactory.hpp@ac27a9c85bea (annotated)

src/share/vm/ci/ciObjectFactory.hpp

Thu, 24 May 2018 18:41:44 +0800

author

aoqi

date

Thu, 24 May 2018 18:41:44 +0800

changeset 8856

ac27a9c85bea

parent 7535

7ae4e26cb1e0

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef SHARE_VM_CI_CIOBJECTFACTORY_HPP
aoqi@0	26	#define SHARE_VM_CI_CIOBJECTFACTORY_HPP
aoqi@0	27
aoqi@0	28	#include "ci/ciClassList.hpp"
aoqi@0	29	#include "ci/ciObject.hpp"
aoqi@0	30	#include "utilities/growableArray.hpp"
aoqi@0	31
aoqi@0	32	// ciObjectFactory
aoqi@0	33	//
aoqi@0	34	// This class handles requests for the creation of new instances
aoqi@0	35	// of ciObject and its subclasses. It contains a caching mechanism
aoqi@0	36	// which ensures that for each oop, at most one ciObject is created.
aoqi@0	37	// This invariant allows efficient implementation of ciObject.
aoqi@0	38	class ciObjectFactory : public ResourceObj {
aoqi@0	39	friend class VMStructs;
aoqi@0	40	friend class ciEnv;
aoqi@0	41
aoqi@0	42	private:
aoqi@0	43	static volatile bool _initialized;
aoqi@0	44	static GrowableArray<ciMetadata*>* _shared_ci_metadata;
aoqi@0	45	static ciSymbol* _shared_ci_symbols[];
aoqi@0	46	static int _shared_ident_limit;
aoqi@0	47
aoqi@0	48	Arena* _arena;
aoqi@0	49	GrowableArray<ciMetadata*>* _ci_metadata;
aoqi@0	50	GrowableArray<ciMethod*>* _unloaded_methods;
aoqi@0	51	GrowableArray<ciKlass*>* _unloaded_klasses;
aoqi@0	52	GrowableArray<ciInstance*>* _unloaded_instances;
aoqi@0	53	GrowableArray<ciReturnAddress*>* _return_addresses;
aoqi@0	54	GrowableArray<ciSymbol*>* _symbols; // keep list of symbols created
aoqi@0	55	int _next_ident;
aoqi@0	56
aoqi@0	57	public:
aoqi@0	58	struct NonPermObject : public ResourceObj {
aoqi@0	59	ciObject* _object;
aoqi@0	60	NonPermObject* _next;
aoqi@0	61
aoqi@0	62	inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object);
aoqi@0	63	ciObject* object() { return _object; }
aoqi@0	64	NonPermObject* &next() { return _next; }
aoqi@0	65	};
aoqi@0	66	private:
aoqi@0	67	enum { NON_PERM_BUCKETS = 61 };
aoqi@0	68	NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS];
aoqi@0	69	int _non_perm_count;
aoqi@0	70
aoqi@0	71	int find(Metadata* key, GrowableArray<ciMetadata*>* objects);
aoqi@0	72	bool is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects);
aoqi@0	73	void insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects);
aoqi@0	74
aoqi@0	75	ciObject* create_new_object(oop o);
vlivanov@7384	76	ciMetadata* create_new_metadata(Metadata* o);
mikael@6198	77
stefank@6992	78	void ensure_metadata_alive(ciMetadata* m);
aoqi@0	79
aoqi@0	80	static bool is_equal(NonPermObject* p, oop key) {
aoqi@0	81	return p->object()->get_oop() == key;
aoqi@0	82	}
aoqi@0	83
aoqi@0	84	NonPermObject* &find_non_perm(oop key);
aoqi@0	85	void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj);
aoqi@0	86
aoqi@0	87	void init_ident_of(ciBaseObject* obj);
aoqi@0	88
aoqi@0	89	Arena* arena() { return _arena; }
aoqi@0	90
aoqi@0	91	void print_contents_impl();
aoqi@0	92
aoqi@0	93	ciInstance* get_unloaded_instance(ciInstanceKlass* klass);
aoqi@0	94
aoqi@0	95	public:
aoqi@0	96	static bool is_initialized() { return _initialized; }
aoqi@0	97
aoqi@0	98	static void initialize();
aoqi@0	99	void init_shared_objects();
aoqi@0	100	void remove_symbols();
aoqi@0	101
aoqi@0	102	ciObjectFactory(Arena* arena, int expected_size);
aoqi@0	103
aoqi@0	104	// Get the ciObject corresponding to some oop.
aoqi@0	105	ciObject* get(oop key);
aoqi@0	106	ciMetadata* get_metadata(Metadata* key);
aoqi@0	107	ciSymbol* get_symbol(Symbol* key);
aoqi@0	108
aoqi@0	109	// Get the ciSymbol corresponding to one of the vmSymbols.
aoqi@0	110	static ciSymbol* vm_symbol_at(int index);
aoqi@0	111
aoqi@0	112	// Get the ciMethod representing an unloaded/unfound method.
aoqi@0	113	ciMethod* get_unloaded_method(ciInstanceKlass* holder,
aoqi@0	114	ciSymbol* name,
aoqi@0	115	ciSymbol* signature,
aoqi@0	116	ciInstanceKlass* accessor);
aoqi@0	117
aoqi@0	118	// Get a ciKlass representing an unloaded klass.
aoqi@0	119	ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
aoqi@0	120	ciSymbol* name,
aoqi@0	121	bool create_if_not_found);
aoqi@0	122
aoqi@0	123	// Get a ciInstance representing an unresolved klass mirror.
aoqi@0	124	ciInstance* get_unloaded_klass_mirror(ciKlass* type);
aoqi@0	125
aoqi@0	126	// Get a ciInstance representing an unresolved method handle constant.
aoqi@0	127	ciInstance* get_unloaded_method_handle_constant(ciKlass* holder,
aoqi@0	128	ciSymbol* name,
aoqi@0	129	ciSymbol* signature,
aoqi@0	130	int ref_kind);
aoqi@0	131
aoqi@0	132	// Get a ciInstance representing an unresolved method type constant.
aoqi@0	133	ciInstance* get_unloaded_method_type_constant(ciSymbol* signature);
aoqi@0	134
aoqi@0	135
aoqi@0	136	ciInstance* get_unloaded_object_constant();
aoqi@0	137
aoqi@0	138	// Get the ciMethodData representing the methodData for a method
aoqi@0	139	// with none.
aoqi@0	140	ciMethodData* get_empty_methodData();
aoqi@0	141
aoqi@0	142	ciReturnAddress* get_return_address(int bci);
aoqi@0	143
aoqi@0	144	GrowableArray<ciMetadata*>* get_ci_metadata() const { return _ci_metadata; }
aoqi@0	145	// RedefineClasses support
aoqi@0	146	void metadata_do(void f(Metadata*));
aoqi@0	147
aoqi@0	148	void print_contents();
aoqi@0	149	void print();
aoqi@0	150	};
aoqi@0	151
aoqi@0	152	#endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP