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/*
* Copyright (c) 1999, 2013, 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_CI_CIOBJECTFACTORY_HPP
#define SHARE_VM_CI_CIOBJECTFACTORY_HPP
#include "ci/ciClassList.hpp"
#include "ci/ciObject.hpp"
#include "utilities/growableArray.hpp"
// 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 {
friend class VMStructs;
friend class ciEnv;
private:
static volatile bool _initialized;
static GrowableArray<ciMetadata*>* _shared_ci_metadata;
static ciSymbol* _shared_ci_symbols[];
static int _shared_ident_limit;
Arena* _arena;
GrowableArray<ciMetadata*>* _ci_metadata;
GrowableArray<ciMethod*>* _unloaded_methods;
GrowableArray<ciKlass*>* _unloaded_klasses;
GrowableArray<ciInstance*>* _unloaded_instances;
GrowableArray<ciReturnAddress*>* _return_addresses;
GrowableArray<ciSymbol*>* _symbols; // keep list of symbols created
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(Metadata* key, GrowableArray<ciMetadata*>* objects);
bool is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects);
void insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects);
ciObject* create_new_object(oop o);
ciMetadata* create_new_object(Metadata* 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(ciBaseObject* obj);
Arena* arena() { return _arena; }
void print_contents_impl();
ciInstance* get_unloaded_instance(ciInstanceKlass* klass);
public:
static bool is_initialized() { return _initialized; }
static void initialize();
void init_shared_objects();
void remove_symbols();
ciObjectFactory(Arena* arena, int expected_size);
// Get the ciObject corresponding to some oop.
ciObject* get(oop key);
ciMetadata* get_metadata(Metadata* key);
ciSymbol* get_symbol(Symbol* 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,
ciInstanceKlass* accessor);
// Get a ciKlass representing an unloaded klass.
ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
ciSymbol* name,
bool create_if_not_found);
// Get a ciInstance representing an unresolved klass mirror.
ciInstance* get_unloaded_klass_mirror(ciKlass* type);
// Get a ciInstance representing an unresolved method handle constant.
ciInstance* get_unloaded_method_handle_constant(ciKlass* holder,
ciSymbol* name,
ciSymbol* signature,
int ref_kind);
// Get a ciInstance representing an unresolved method type constant.
ciInstance* get_unloaded_method_type_constant(ciSymbol* signature);
ciInstance* get_unloaded_object_constant();
// Get the ciMethodData representing the methodData for a method
// with none.
ciMethodData* get_empty_methodData();
ciReturnAddress* get_return_address(int bci);
GrowableArray<ciMetadata*>* get_ci_metadata() const { return _ci_metadata; }
// RedefineClasses support
void metadata_do(void f(Metadata*));
void print_contents();
void print();
};
#endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP
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