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src/share/vm/classfile/loaderConstraints.hpp@c89f86385056 (annotated)

src/share/vm/classfile/loaderConstraints.hpp

Fri, 20 Mar 2009 23:19:36 -0700

author

jrose

date

Fri, 20 Mar 2009 23:19:36 -0700

changeset 1100

c89f86385056

parent 435

a61af66fc99e

child 1693

38836cf1d8d2

child 1771

0c3f888b7636

permissions

-rw-r--r--

6814659: separable cleanups and subroutines for 6655638
Summary: preparatory but separable changes for method handles
Reviewed-by: kvn, never

duke@435	1	/*
jrose@1100	2	* Copyright 2003-2009 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	class LoaderConstraintEntry;
duke@435	26
duke@435	27	class LoaderConstraintTable : public Hashtable {
duke@435	28	friend class VMStructs;
duke@435	29	private:
duke@435	30
duke@435	31	enum Constants {
duke@435	32	_loader_constraint_size = 107, // number of entries in constraint table
duke@435	33	_nof_buckets = 1009 // number of buckets in hash table
duke@435	34	};
duke@435	35
duke@435	36	LoaderConstraintEntry** find_loader_constraint(symbolHandle name,
duke@435	37	Handle loader);
duke@435	38
duke@435	39	public:
duke@435	40
duke@435	41	LoaderConstraintTable(int nof_buckets);
duke@435	42
duke@435	43	LoaderConstraintEntry* new_entry(unsigned int hash, symbolOop name,
duke@435	44	klassOop klass, int num_loaders,
duke@435	45	int max_loaders);
duke@435	46
duke@435	47	LoaderConstraintEntry* bucket(int i) {
duke@435	48	return (LoaderConstraintEntry*)Hashtable::bucket(i);
duke@435	49	}
duke@435	50
duke@435	51	LoaderConstraintEntry** bucket_addr(int i) {
duke@435	52	return (LoaderConstraintEntry**)Hashtable::bucket_addr(i);
duke@435	53	}
duke@435	54
duke@435	55	// GC support
duke@435	56	void oops_do(OopClosure* f);
duke@435	57	void always_strong_classes_do(OopClosure* blk);
duke@435	58
duke@435	59	// Check class loader constraints
duke@435	60	bool add_entry(symbolHandle name, klassOop klass1, Handle loader1,
duke@435	61	klassOop klass2, Handle loader2);
duke@435	62
jrose@1100	63	// Note: The main entry point for this module is via SystemDictionary.
jrose@1100	64	// SystemDictionary::check_signature_loaders(symbolHandle signature,
jrose@1100	65	// Handle loader1, Handle loader2,
jrose@1100	66	// bool is_method, TRAPS)
duke@435	67
duke@435	68	klassOop find_constrained_klass(symbolHandle name, Handle loader);
duke@435	69	klassOop find_constrained_elem_klass(symbolHandle name, symbolHandle elem_name,
duke@435	70	Handle loader, TRAPS);
duke@435	71
duke@435	72
duke@435	73	// Class loader constraints
duke@435	74
duke@435	75	void ensure_loader_constraint_capacity(LoaderConstraintEntry *p, int nfree);
duke@435	76	void extend_loader_constraint(LoaderConstraintEntry* p, Handle loader,
duke@435	77	klassOop klass);
duke@435	78	void merge_loader_constraints(LoaderConstraintEntry** pp1,
duke@435	79	LoaderConstraintEntry** pp2, klassOop klass);
duke@435	80
duke@435	81	bool check_or_update(instanceKlassHandle k, Handle loader,
duke@435	82	symbolHandle name);
duke@435	83
duke@435	84
duke@435	85	void purge_loader_constraints(BoolObjectClosure* is_alive);
duke@435	86
duke@435	87	void verify(Dictionary* dictionary);
duke@435	88	#ifndef PRODUCT
duke@435	89	void print();
duke@435	90	#endif
duke@435	91	};
duke@435	92
duke@435	93	class LoaderConstraintEntry : public HashtableEntry {
duke@435	94	friend class VMStructs;
duke@435	95	private:
duke@435	96	symbolOop _name; // class name
duke@435	97	int _num_loaders;
duke@435	98	int _max_loaders;
duke@435	99	oop* _loaders; // initiating loaders
duke@435	100
duke@435	101	public:
duke@435	102
duke@435	103	klassOop klass() { return (klassOop)literal(); }
duke@435	104	klassOop* klass_addr() { return (klassOop*)literal_addr(); }
duke@435	105	void set_klass(klassOop k) { set_literal(k); }
duke@435	106
duke@435	107	LoaderConstraintEntry* next() {
duke@435	108	return (LoaderConstraintEntry*)HashtableEntry::next();
duke@435	109	}
duke@435	110
duke@435	111	LoaderConstraintEntry** next_addr() {
duke@435	112	return (LoaderConstraintEntry**)HashtableEntry::next_addr();
duke@435	113	}
duke@435	114	void set_next(LoaderConstraintEntry* next) {
duke@435	115	HashtableEntry::set_next(next);
duke@435	116	}
duke@435	117
duke@435	118	symbolOop name() { return _name; }
duke@435	119	symbolOop* name_addr() { return &_name; }
duke@435	120	void set_name(symbolOop name) { _name = name; }
duke@435	121
duke@435	122	int num_loaders() { return _num_loaders; }
duke@435	123	void set_num_loaders(int i) { _num_loaders = i; }
duke@435	124
duke@435	125	int max_loaders() { return _max_loaders; }
duke@435	126	void set_max_loaders(int i) { _max_loaders = i; }
duke@435	127
duke@435	128	oop* loaders() { return _loaders; }
duke@435	129	void set_loaders(oop* loaders) { _loaders = loaders; }
duke@435	130
duke@435	131	oop loader(int i) { return _loaders[i]; }
duke@435	132	oop* loader_addr(int i) { return &_loaders[i]; }
duke@435	133	void set_loader(int i, oop p) { _loaders[i] = p; }
duke@435	134
duke@435	135	};