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90 lines
3.5 KiB
C++
90 lines
3.5 KiB
C++
/*
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* Copyright (c) 2010, 2025, 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_MEMORY_METADATAFACTORY_HPP
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#define SHARE_MEMORY_METADATAFACTORY_HPP
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#include "classfile/classLoaderData.hpp"
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#include "cppstdlib/type_traits.hpp"
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#include "memory/classLoaderMetaspace.hpp"
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#include "oops/array.inline.hpp"
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#include "utilities/exceptions.hpp"
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#include "utilities/globalDefinitions.hpp"
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class MetadataFactory : AllStatic {
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public:
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template <typename T>
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static Array<T>* new_array(ClassLoaderData* loader_data, int length, TRAPS) {
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return new (loader_data, length, THREAD) Array<T>(length);
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}
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template <typename T>
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static Array<T>* new_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {
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Array<T>* array = new_array<T>(loader_data, length, CHECK_NULL);
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for (int i = 0; i < length; i++) {
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array->at_put(i, value);
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}
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return array;
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}
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// This API should be used for TrainingData only.
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template <typename T>
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static Array<T>* new_array_from_c_heap(int length, MemTag flags) {
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return new (length, flags) Array<T>(length);
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}
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template <typename T>
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static void free_array(ClassLoaderData* loader_data, Array<T>* data) {
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if (data != nullptr) {
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assert(loader_data != nullptr, "shouldn't pass null");
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assert(!data->in_aot_cache(), "cannot deallocate array in aot metaspace spaces");
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int size = data->size();
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loader_data->metaspace_non_null()->deallocate((MetaWord*)data, size);
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}
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}
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// Deallocation method for metadata
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template <class T>
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static void free_metadata(ClassLoaderData* loader_data, T* md) {
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if (md != nullptr) {
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assert(loader_data != nullptr, "shouldn't pass null");
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int size = md->size();
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// Call metadata's deallocate function which will deallocate fields and release_C_heap_structures
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assert(!md->on_stack(), "can't deallocate things on stack");
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assert(!md->in_aot_cache(), "cannot deallocate if in aot metaspace spaces");
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md->deallocate_contents(loader_data);
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// Call the destructor. This is currently used for MethodData which has a member
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// that needs to be destructed to release resources. Most Metadata derived classes have noop
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// destructors and/or cleanup using deallocate_contents.
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// T is a potentially const or volatile qualified pointer. Remove any const
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// or volatile so we can call the destructor of the type T points to.
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using U = std::remove_cv_t<T>;
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md->~U();
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loader_data->metaspace_non_null()->deallocate((MetaWord*)md, size);
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}
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}
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};
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#endif // SHARE_MEMORY_METADATAFACTORY_HPP
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