Mercurial > hg > truffle
diff src/share/vm/ci/ciObjectFactory.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 5571b97fc1ec c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/ci/ciObjectFactory.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,110 @@ +/* + * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// ciObjectFactory +// +// This class handles requests for the creation of new instances +// of ciObject and its subclasses. It contains a caching mechanism +// which ensures that for each oop, at most one ciObject is created. +// This invariant allows efficient implementation of ciObject. +class ciObjectFactory : public ResourceObj { +private: + static volatile bool _initialized; + static GrowableArray<ciObject*>* _shared_ci_objects; + static ciSymbol* _shared_ci_symbols[]; + static int _shared_ident_limit; + + Arena* _arena; + GrowableArray<ciObject*>* _ci_objects; + GrowableArray<ciMethod*>* _unloaded_methods; + GrowableArray<ciKlass*>* _unloaded_klasses; + GrowableArray<ciReturnAddress*>* _return_addresses; + int _next_ident; + +public: + struct NonPermObject : public ResourceObj { + ciObject* _object; + NonPermObject* _next; + + inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object); + ciObject* object() { return _object; } + NonPermObject* &next() { return _next; } + }; +private: + enum { NON_PERM_BUCKETS = 61 }; + NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS]; + int _non_perm_count; + + int find(oop key, GrowableArray<ciObject*>* objects); + bool is_found_at(int index, oop key, GrowableArray<ciObject*>* objects); + void insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects); + ciObject* create_new_object(oop o); + static bool is_equal(NonPermObject* p, oop key) { + return p->object()->get_oop() == key; + } + + NonPermObject* &find_non_perm(oop key); + void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj); + + void init_ident_of(ciObject* obj); + + Arena* arena() { return _arena; } + + void print_contents_impl(); + +public: + static bool is_initialized() { return _initialized; } + + static void initialize(); + void init_shared_objects(); + + ciObjectFactory(Arena* arena, int expected_size); + + + // Get the ciObject corresponding to some oop. + ciObject* get(oop key); + + // Get the ciSymbol corresponding to one of the vmSymbols. + static ciSymbol* vm_symbol_at(int index); + + // Get the ciMethod representing an unloaded/unfound method. + ciMethod* get_unloaded_method(ciInstanceKlass* holder, + ciSymbol* name, + ciSymbol* signature); + + // Get a ciKlass representing an unloaded klass. + ciKlass* get_unloaded_klass(ciKlass* accessing_klass, + ciSymbol* name, + bool create_if_not_found); + + + // Get the ciMethodData representing the methodData for a method + // with none. + ciMethodData* get_empty_methodData(); + + ciReturnAddress* get_return_address(int bci); + + void print_contents(); + void print(); +};