1 /* 2 * Copyright (c) 2011, 2016, 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 #include "classfile/classLoaderData.hpp" 26 #include "classfile/javaClasses.hpp" 27 #include "oops/oop.inline.hpp" 28 29 unsigned int ClassLoaderData::identity_hash() const { 30 return _class_loader == NULL ? 0 : _class_loader->identity_hash(); 31 } 32 33 inline ClassLoaderData* ClassLoaderData::class_loader_data_or_null(oop loader) { 34 if (loader == NULL) { 35 return ClassLoaderData::the_null_class_loader_data(); 36 } 37 return java_lang_ClassLoader::loader_data(loader); 38 } 39 40 inline ClassLoaderData* ClassLoaderData::class_loader_data(oop loader) { 41 ClassLoaderData* loader_data = class_loader_data_or_null(loader); 42 assert(loader_data != NULL, "Must be"); 43 return loader_data; 44 } 45 46 47 inline ClassLoaderData *ClassLoaderDataGraph::find_or_create(Handle loader, TRAPS) { 48 guarantee(loader() != NULL && loader()->is_oop(), "Loader must be oop"); 49 // Gets the class loader data out of the java/lang/ClassLoader object, if non-null 50 // it's already in the loader_data, so no need to add 51 ClassLoaderData* loader_data= java_lang_ClassLoader::loader_data(loader()); 52 if (loader_data) { 53 return loader_data; 54 } 55 return ClassLoaderDataGraph::add(loader, false, THREAD); 56 }