1 /* 2 * Copyright (c) 2010, 2024, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_MEMORY_METADATAFACTORY_HPP 26 #define SHARE_MEMORY_METADATAFACTORY_HPP 27 28 #include "classfile/classLoaderData.hpp" 29 #include "memory/classLoaderMetaspace.hpp" 30 #include "oops/array.inline.hpp" 31 #include "utilities/exceptions.hpp" 32 #include "utilities/globalDefinitions.hpp" 33 #include <type_traits> 34 35 class MetadataFactory : AllStatic { 36 public: 37 template <typename T> 38 static Array<T>* new_array(ClassLoaderData* loader_data, int length, TRAPS) { 39 return new (loader_data, length, THREAD) Array<T>(length); 40 } 41 42 template <typename T> 43 static Array<T>* new_array(ClassLoaderData* loader_data, int length, T value, TRAPS) { 44 Array<T>* array = new_array<T>(loader_data, length, CHECK_NULL); 45 for (int i = 0; i < length; i++) { 46 array->at_put(i, value); 47 } 48 return array; 49 } 50 51 template <typename T> 52 static void free_array(ClassLoaderData* loader_data, Array<T>* data) { 53 if (data != nullptr) { 54 assert(loader_data != nullptr, "shouldn't pass null"); 55 assert(!data->is_shared(), "cannot deallocate array in shared spaces"); 56 int size = data->size(); 57 loader_data->metaspace_non_null()->deallocate((MetaWord*)data, size); 58 } 59 } 60 61 // Deallocation method for metadata 62 template <class T> 63 static void free_metadata(ClassLoaderData* loader_data, T* md) { 64 if (md != nullptr) { 65 assert(loader_data != nullptr, "shouldn't pass null"); 66 int size = md->size(); 67 // Call metadata's deallocate function which will deallocate fields and release_C_heap_structures 68 assert(!md->on_stack(), "can't deallocate things on stack"); 69 assert(!md->is_shared(), "cannot deallocate if in shared spaces"); 70 md->deallocate_contents(loader_data); 71 // Call the destructor. This is currently used for MethodData which has a member 72 // that needs to be destructed to release resources. Most Metadata derived classes have noop 73 // destructors and/or cleanup using deallocate_contents. 74 // T is a potentially const or volatile qualified pointer. Remove any const 75 // or volatile so we can call the destructor of the type T points to. 76 using U = std::remove_cv_t<T>; 77 md->~U(); 78 loader_data->metaspace_non_null()->deallocate((MetaWord*)md, size); 79 } 80 } 81 }; 82 83 #endif // SHARE_MEMORY_METADATAFACTORY_HPP --- EOF ---