153 lines
5.3 KiB
C++
153 lines
5.3 KiB
C++
/*
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* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_CI_CIOBJECTFACTORY_HPP
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#define SHARE_VM_CI_CIOBJECTFACTORY_HPP
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#include "ci/ciClassList.hpp"
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#include "ci/ciObject.hpp"
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#include "utilities/growableArray.hpp"
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// ciObjectFactory
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//
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// This class handles requests for the creation of new instances
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// of ciObject and its subclasses. It contains a caching mechanism
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// which ensures that for each oop, at most one ciObject is created.
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// This invariant allows efficient implementation of ciObject.
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class ciObjectFactory : public ResourceObj {
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friend class VMStructs;
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friend class ciEnv;
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private:
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static volatile bool _initialized;
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static GrowableArray<ciMetadata*>* _shared_ci_metadata;
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static ciSymbol* _shared_ci_symbols[];
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static int _shared_ident_limit;
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Arena* _arena;
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GrowableArray<ciMetadata*>* _ci_metadata;
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GrowableArray<ciMethod*>* _unloaded_methods;
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GrowableArray<ciKlass*>* _unloaded_klasses;
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GrowableArray<ciInstance*>* _unloaded_instances;
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GrowableArray<ciReturnAddress*>* _return_addresses;
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GrowableArray<ciSymbol*>* _symbols; // keep list of symbols created
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int _next_ident;
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public:
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struct NonPermObject : public ResourceObj {
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ciObject* _object;
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NonPermObject* _next;
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inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object);
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ciObject* object() { return _object; }
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NonPermObject* &next() { return _next; }
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};
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private:
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enum { NON_PERM_BUCKETS = 61 };
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NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS];
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int _non_perm_count;
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int find(Metadata* key, GrowableArray<ciMetadata*>* objects);
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bool is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects);
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void insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects);
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ciObject* create_new_object(oop o);
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ciMetadata* create_new_metadata(Metadata* o);
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void ensure_metadata_alive(ciMetadata* m);
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static bool is_equal(NonPermObject* p, oop key) {
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return p->object()->get_oop() == key;
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}
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NonPermObject* &find_non_perm(oop key);
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void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj);
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void init_ident_of(ciBaseObject* obj);
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Arena* arena() { return _arena; }
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void print_contents_impl();
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ciInstance* get_unloaded_instance(ciInstanceKlass* klass);
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public:
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static bool is_initialized() { return _initialized; }
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static void initialize();
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void init_shared_objects();
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void remove_symbols();
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ciObjectFactory(Arena* arena, int expected_size);
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// Get the ciObject corresponding to some oop.
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ciObject* get(oop key);
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ciMetadata* get_metadata(Metadata* key);
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ciSymbol* get_symbol(Symbol* key);
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// Get the ciSymbol corresponding to one of the vmSymbols.
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static ciSymbol* vm_symbol_at(int index);
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// Get the ciMethod representing an unloaded/unfound method.
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ciMethod* get_unloaded_method(ciInstanceKlass* holder,
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ciSymbol* name,
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ciSymbol* signature,
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ciInstanceKlass* accessor);
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// Get a ciKlass representing an unloaded klass.
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ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
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ciSymbol* name,
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bool create_if_not_found);
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// Get a ciInstance representing an unresolved klass mirror.
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ciInstance* get_unloaded_klass_mirror(ciKlass* type);
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// Get a ciInstance representing an unresolved method handle constant.
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ciInstance* get_unloaded_method_handle_constant(ciKlass* holder,
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ciSymbol* name,
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ciSymbol* signature,
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int ref_kind);
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// Get a ciInstance representing an unresolved method type constant.
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ciInstance* get_unloaded_method_type_constant(ciSymbol* signature);
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ciInstance* get_unloaded_object_constant();
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// Get the ciMethodData representing the methodData for a method
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// with none.
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ciMethodData* get_empty_methodData();
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ciReturnAddress* get_return_address(int bci);
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GrowableArray<ciMetadata*>* get_ci_metadata() const { return _ci_metadata; }
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// RedefineClasses support
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void metadata_do(void f(Metadata*));
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void print_contents();
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void print();
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};
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#endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP
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