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

src/share/vm/classfile/loaderConstraints.hpp@7ae4e26cb1e0 (annotated)

src/share/vm/classfile/loaderConstraints.hpp

Thu, 12 Oct 2017 21:27:07 +0800

author

aoqi

date

Thu, 12 Oct 2017 21:27:07 +0800

changeset 7535

7ae4e26cb1e0

parent 6876

710a3c8b516e

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2003, 2012, 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_CLASSFILE_LOADERCONSTRAINTS_HPP
aoqi@0	26	#define SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP
aoqi@0	27
aoqi@0	28	#include "classfile/dictionary.hpp"
aoqi@0	29	#include "classfile/placeholders.hpp"
aoqi@0	30	#include "utilities/hashtable.hpp"
aoqi@0	31
aoqi@0	32	class LoaderConstraintEntry;
aoqi@0	33	class Symbol;
aoqi@0	34
aoqi@0	35	class LoaderConstraintTable : public Hashtable<Klass*, mtClass> {
aoqi@0	36	friend class VMStructs;
aoqi@0	37	private:
aoqi@0	38
aoqi@0	39	enum Constants {
aoqi@0	40	_loader_constraint_size = 107, // number of entries in constraint table
aoqi@0	41	_nof_buckets = 1009 // number of buckets in hash table
aoqi@0	42	};
aoqi@0	43
aoqi@0	44	LoaderConstraintEntry** find_loader_constraint(Symbol* name,
aoqi@0	45	Handle loader);
aoqi@0	46
aoqi@0	47	public:
aoqi@0	48
aoqi@0	49	LoaderConstraintTable(int nof_buckets);
aoqi@0	50
aoqi@0	51	LoaderConstraintEntry* new_entry(unsigned int hash, Symbol* name,
aoqi@0	52	Klass* klass, int num_loaders,
aoqi@0	53	int max_loaders);
aoqi@0	54	void free_entry(LoaderConstraintEntry *entry);
aoqi@0	55
aoqi@0	56	LoaderConstraintEntry* bucket(int i) {
aoqi@0	57	return (LoaderConstraintEntry*)Hashtable<Klass*, mtClass>::bucket(i);
aoqi@0	58	}
aoqi@0	59
aoqi@0	60	LoaderConstraintEntry** bucket_addr(int i) {
aoqi@0	61	return (LoaderConstraintEntry**)Hashtable<Klass*, mtClass>::bucket_addr(i);
aoqi@0	62	}
aoqi@0	63
aoqi@0	64	// Enhanced Class Redefinition support
aoqi@0	65	void classes_do(KlassClosure* f);
aoqi@0	66
aoqi@0	67	// Check class loader constraints
aoqi@0	68	bool add_entry(Symbol* name, Klass* klass1, Handle loader1,
aoqi@0	69	Klass* klass2, Handle loader2);
aoqi@0	70
aoqi@0	71	// Note: The main entry point for this module is via SystemDictionary.
aoqi@0	72	// SystemDictionary::check_signature_loaders(Symbol* signature,
aoqi@0	73	// Handle loader1, Handle loader2,
aoqi@0	74	// bool is_method, TRAPS)
aoqi@0	75
aoqi@0	76	Klass* find_constrained_klass(Symbol* name, Handle loader);
aoqi@0	77
aoqi@0	78	// Class loader constraints
aoqi@0	79
aoqi@0	80	void ensure_loader_constraint_capacity(LoaderConstraintEntry *p, int nfree);
aoqi@0	81	void extend_loader_constraint(LoaderConstraintEntry* p, Handle loader,
aoqi@0	82	Klass* klass);
aoqi@0	83	void merge_loader_constraints(LoaderConstraintEntry** pp1,
aoqi@0	84	LoaderConstraintEntry** pp2, Klass* klass);
aoqi@0	85
aoqi@0	86	bool check_or_update(instanceKlassHandle k, Handle loader,
aoqi@0	87	Symbol* name);
aoqi@0	88
aoqi@0	89
aoqi@0	90	void purge_loader_constraints();
aoqi@0	91
aoqi@0	92	void verify(Dictionary* dictionary, PlaceholderTable* placeholders);
aoqi@0	93	#ifndef PRODUCT
aoqi@0	94	void print();
aoqi@0	95	#endif
aoqi@0	96	};
aoqi@0	97
aoqi@0	98	class LoaderConstraintEntry : public HashtableEntry<Klass*, mtClass> {
aoqi@0	99	friend class VMStructs;
aoqi@0	100	private:
aoqi@0	101	Symbol* _name; // class name
aoqi@0	102	int _num_loaders;
aoqi@0	103	int _max_loaders;
aoqi@0	104	// Loader constraints enforce correct linking behavior.
aoqi@0	105	// Thus, it really operates on ClassLoaderData which represents linking domain,
aoqi@0	106	// not class loaders.
aoqi@0	107	ClassLoaderData** _loaders; // initiating loaders
aoqi@0	108
aoqi@0	109	public:
aoqi@0	110
aoqi@0	111	Klass* klass() { return literal(); }
aoqi@0	112	Klass** klass_addr() { return literal_addr(); }
aoqi@0	113	void set_klass(Klass* k) { set_literal(k); }
aoqi@0	114
aoqi@0	115	LoaderConstraintEntry* next() {
aoqi@0	116	return (LoaderConstraintEntry*)HashtableEntry<Klass*, mtClass>::next();
aoqi@0	117	}
aoqi@0	118
aoqi@0	119	LoaderConstraintEntry** next_addr() {
aoqi@0	120	return (LoaderConstraintEntry**)HashtableEntry<Klass*, mtClass>::next_addr();
aoqi@0	121	}
aoqi@0	122	void set_next(LoaderConstraintEntry* next) {
aoqi@0	123	HashtableEntry<Klass*, mtClass>::set_next(next);
aoqi@0	124	}
aoqi@0	125
aoqi@0	126	Symbol* name() { return _name; }
aoqi@0	127	void set_name(Symbol* name) {
aoqi@0	128	_name = name;
aoqi@0	129	if (name != NULL) name->increment_refcount();
aoqi@0	130	}
aoqi@0	131
aoqi@0	132	int num_loaders() { return _num_loaders; }
aoqi@0	133	void set_num_loaders(int i) { _num_loaders = i; }
aoqi@0	134
aoqi@0	135	int max_loaders() { return _max_loaders; }
aoqi@0	136	void set_max_loaders(int i) { _max_loaders = i; }
aoqi@0	137
aoqi@0	138	ClassLoaderData** loaders() { return _loaders; }
aoqi@0	139	void set_loaders(ClassLoaderData** loaders) { _loaders = loaders; }
aoqi@0	140
aoqi@0	141	ClassLoaderData* loader_data(int i) { return _loaders[i]; }
aoqi@0	142	void set_loader_data(int i, ClassLoaderData* p) { _loaders[i] = p; }
aoqi@0	143	// convenience
aoqi@0	144	void set_loader(int i, oop p);
aoqi@0	145	};
aoqi@0	146
aoqi@0	147	#endif // SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP