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view src/share/vm/classfile/loaderConstraints.hpp @ 6408:e5768e936147
Allow snippets to inherit the stateAfter and stamp from the replacee
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Fri, 14 Sep 2012 14:21:33 -0700 |
parents | d2a62e0f25eb |
children | da91efe96a93 |
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/* * Copyright (c) 2003, 2011, 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. * */ #ifndef SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP #define SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP #include "classfile/dictionary.hpp" #include "classfile/placeholders.hpp" #include "utilities/hashtable.hpp" class LoaderConstraintEntry; class LoaderConstraintTable : public Hashtable<klassOop, mtClass> { 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(Symbol* name, Handle loader); public: LoaderConstraintTable(int nof_buckets); LoaderConstraintEntry* new_entry(unsigned int hash, Symbol* name, klassOop klass, int num_loaders, int max_loaders); void free_entry(LoaderConstraintEntry *entry); LoaderConstraintEntry* bucket(int i) { return (LoaderConstraintEntry*)Hashtable<klassOop, mtClass>::bucket(i); } LoaderConstraintEntry** bucket_addr(int i) { return (LoaderConstraintEntry**)Hashtable<klassOop, mtClass>::bucket_addr(i); } // GC support void oops_do(OopClosure* f); // Check class loader constraints bool add_entry(Symbol* name, klassOop klass1, Handle loader1, klassOop klass2, Handle loader2); // Note: The main entry point for this module is via SystemDictionary. // SystemDictionary::check_signature_loaders(Symbol* signature, // Handle loader1, Handle loader2, // bool is_method, TRAPS) klassOop find_constrained_klass(Symbol* 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, Symbol* name); void purge_loader_constraints(BoolObjectClosure* is_alive); void verify(Dictionary* dictionary, PlaceholderTable* placeholders); #ifndef PRODUCT void print(); #endif }; class LoaderConstraintEntry : public HashtableEntry<klassOop, mtClass> { friend class VMStructs; private: Symbol* _name; // class name int _num_loaders; int _max_loaders; oop* _loaders; // initiating loaders public: klassOop klass() { return literal(); } klassOop* klass_addr() { return literal_addr(); } void set_klass(klassOop k) { set_literal(k); } LoaderConstraintEntry* next() { return (LoaderConstraintEntry*)HashtableEntry<klassOop, mtClass>::next(); } LoaderConstraintEntry** next_addr() { return (LoaderConstraintEntry**)HashtableEntry<klassOop, mtClass>::next_addr(); } void set_next(LoaderConstraintEntry* next) { HashtableEntry<klassOop, mtClass>::set_next(next); } Symbol* name() { return _name; } void set_name(Symbol* name) { _name = name; if (name != NULL) name->increment_refcount(); } 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; } }; #endif // SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP