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/*
* Copyright (c) 2003, 2009, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
class LoaderConstraintEntry;
class LoaderConstraintTable : public Hashtable {
friend class VMStructs;
private:
enum Constants {
_loader_constraint_size = 107, // number of entries in constraint table
_nof_buckets = 1009 // number of buckets in hash table
};
LoaderConstraintEntry** find_loader_constraint(symbolHandle name,
Handle loader);
public:
LoaderConstraintTable(int nof_buckets);
LoaderConstraintEntry* new_entry(unsigned int hash, symbolOop name,
klassOop klass, int num_loaders,
int max_loaders);
LoaderConstraintEntry* bucket(int i) {
return (LoaderConstraintEntry*)Hashtable::bucket(i);
}
LoaderConstraintEntry** bucket_addr(int i) {
return (LoaderConstraintEntry**)Hashtable::bucket_addr(i);
}
// GC support
void oops_do(OopClosure* f);
void always_strong_classes_do(OopClosure* blk);
// Check class loader constraints
bool add_entry(symbolHandle name, klassOop klass1, Handle loader1,
klassOop klass2, Handle loader2);
// Note: The main entry point for this module is via SystemDictionary.
// SystemDictionary::check_signature_loaders(symbolHandle signature,
// Handle loader1, Handle loader2,
// bool is_method, TRAPS)
klassOop find_constrained_klass(symbolHandle name, Handle loader);
// Class loader constraints
void ensure_loader_constraint_capacity(LoaderConstraintEntry *p, int nfree);
void extend_loader_constraint(LoaderConstraintEntry* p, Handle loader,
klassOop klass);
void merge_loader_constraints(LoaderConstraintEntry** pp1,
LoaderConstraintEntry** pp2, klassOop klass);
bool check_or_update(instanceKlassHandle k, Handle loader,
symbolHandle name);
void purge_loader_constraints(BoolObjectClosure* is_alive);
void verify(Dictionary* dictionary, PlaceholderTable* placeholders);
#ifndef PRODUCT
void print();
#endif
};
class LoaderConstraintEntry : public HashtableEntry {
friend class VMStructs;
private:
symbolOop _name; // class name
int _num_loaders;
int _max_loaders;
oop* _loaders; // initiating loaders
public:
klassOop klass() { return (klassOop)literal(); }
klassOop* klass_addr() { return (klassOop*)literal_addr(); }
void set_klass(klassOop k) { set_literal(k); }
LoaderConstraintEntry* next() {
return (LoaderConstraintEntry*)HashtableEntry::next();
}
LoaderConstraintEntry** next_addr() {
return (LoaderConstraintEntry**)HashtableEntry::next_addr();
}
void set_next(LoaderConstraintEntry* next) {
HashtableEntry::set_next(next);
}
symbolOop name() { return _name; }
symbolOop* name_addr() { return &_name; }
void set_name(symbolOop name) { _name = name; }
int num_loaders() { return _num_loaders; }
void set_num_loaders(int i) { _num_loaders = i; }
int max_loaders() { return _max_loaders; }
void set_max_loaders(int i) { _max_loaders = i; }
oop* loaders() { return _loaders; }
void set_loaders(oop* loaders) { _loaders = loaders; }
oop loader(int i) { return _loaders[i]; }
oop* loader_addr(int i) { return &_loaders[i]; }
void set_loader(int i, oop p) { _loaders[i] = p; }
};
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