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src/share/vm/ci/ciObjectFactory.hpp@3582bf76420e (annotated)

src/share/vm/ci/ciObjectFactory.hpp

Thu, 27 Jan 2011 16:11:27 -0800

author

coleenp

date

Thu, 27 Jan 2011 16:11:27 -0800

changeset 2497

3582bf76420e

parent 2314

f95d63e2154a

child 2708

1d1603768966

permissions

-rw-r--r--

6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank

duke@435	1	/*
stefank@2314	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
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 {
duke@435	39	private:
duke@435	40	static volatile bool _initialized;
duke@435	41	static GrowableArray<ciObject*>* _shared_ci_objects;
duke@435	42	static ciSymbol* _shared_ci_symbols[];
duke@435	43	static int _shared_ident_limit;
duke@435	44
duke@435	45	Arena* _arena;
duke@435	46	GrowableArray<ciObject*>* _ci_objects;
duke@435	47	GrowableArray<ciMethod*>* _unloaded_methods;
duke@435	48	GrowableArray<ciKlass*>* _unloaded_klasses;
jrose@1957	49	GrowableArray<ciInstance*>* _unloaded_instances;
duke@435	50	GrowableArray<ciReturnAddress*>* _return_addresses;
coleenp@2497	51	GrowableArray<ciSymbol*>* _symbols; // keep list of symbols created
duke@435	52	int _next_ident;
duke@435	53
duke@435	54	public:
duke@435	55	struct NonPermObject : public ResourceObj {
duke@435	56	ciObject* _object;
duke@435	57	NonPermObject* _next;
duke@435	58
duke@435	59	inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object);
duke@435	60	ciObject* object() { return _object; }
duke@435	61	NonPermObject* &next() { return _next; }
duke@435	62	};
duke@435	63	private:
duke@435	64	enum { NON_PERM_BUCKETS = 61 };
duke@435	65	NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS];
duke@435	66	int _non_perm_count;
duke@435	67
duke@435	68	int find(oop key, GrowableArray<ciObject*>* objects);
duke@435	69	bool is_found_at(int index, oop key, GrowableArray<ciObject*>* objects);
duke@435	70	void insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects);
duke@435	71	ciObject* create_new_object(oop o);
duke@435	72	static bool is_equal(NonPermObject* p, oop key) {
duke@435	73	return p->object()->get_oop() == key;
duke@435	74	}
duke@435	75
duke@435	76	NonPermObject* &find_non_perm(oop key);
duke@435	77	void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj);
duke@435	78
duke@435	79	void init_ident_of(ciObject* obj);
coleenp@2497	80	void init_ident_of(ciSymbol* obj);
duke@435	81
duke@435	82	Arena* arena() { return _arena; }
duke@435	83
duke@435	84	void print_contents_impl();
duke@435	85
jrose@1957	86	ciInstance* get_unloaded_instance(ciInstanceKlass* klass);
jrose@1957	87
duke@435	88	public:
duke@435	89	static bool is_initialized() { return _initialized; }
duke@435	90
duke@435	91	static void initialize();
duke@435	92	void init_shared_objects();
coleenp@2497	93	void remove_symbols();
duke@435	94
duke@435	95	ciObjectFactory(Arena* arena, int expected_size);
duke@435	96
duke@435	97	// Get the ciObject corresponding to some oop.
duke@435	98	ciObject* get(oop key);
duke@435	99
coleenp@2497	100	ciSymbol* get_symbol(Symbol* key);
coleenp@2497	101
duke@435	102	// Get the ciSymbol corresponding to one of the vmSymbols.
duke@435	103	static ciSymbol* vm_symbol_at(int index);
duke@435	104
duke@435	105	// Get the ciMethod representing an unloaded/unfound method.
duke@435	106	ciMethod* get_unloaded_method(ciInstanceKlass* holder,
duke@435	107	ciSymbol* name,
duke@435	108	ciSymbol* signature);
duke@435	109
duke@435	110	// Get a ciKlass representing an unloaded klass.
duke@435	111	ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
duke@435	112	ciSymbol* name,
duke@435	113	bool create_if_not_found);
duke@435	114
jrose@1957	115	// Get a ciInstance representing an unresolved klass mirror.
jrose@1957	116	ciInstance* get_unloaded_klass_mirror(ciKlass* type);
jrose@1957	117
jrose@1957	118	// Get a ciInstance representing an unresolved method handle constant.
jrose@1957	119	ciInstance* get_unloaded_method_handle_constant(ciKlass* holder,
jrose@1957	120	ciSymbol* name,
jrose@1957	121	ciSymbol* signature,
jrose@1957	122	int ref_kind);
jrose@1957	123
jrose@1957	124	// Get a ciInstance representing an unresolved method type constant.
jrose@1957	125	ciInstance* get_unloaded_method_type_constant(ciSymbol* signature);
jrose@1957	126
duke@435	127
duke@435	128	// Get the ciMethodData representing the methodData for a method
duke@435	129	// with none.
duke@435	130	ciMethodData* get_empty_methodData();
duke@435	131
duke@435	132	ciReturnAddress* get_return_address(int bci);
duke@435	133
duke@435	134	void print_contents();
duke@435	135	void print();
duke@435	136	};
stefank@2314	137
stefank@2314	138	#endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP