1 /* 2 * Copyright (c) 2011, 2018, 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_VM_CLASSFILE_CLASSLOADERDATA_INLINE_HPP 26 #define SHARE_VM_CLASSFILE_CLASSLOADERDATA_INLINE_HPP 27 28 #include "classfile/classLoaderData.hpp" 29 #include "classfile/javaClasses.hpp" 30 #include "oops/instanceKlass.hpp" 31 #include "oops/oop.inline.hpp" 32 #include "oops/oopHandle.inline.hpp" 33 #include "oops/weakHandle.inline.hpp" 34 35 inline oop ClassLoaderData::class_loader() const { 36 assert(!_unloading, "This oop is not available to unloading class loader data"); 37 assert(_holder.is_null() || holder_no_keepalive() != NULL , "This class loader data holder must be alive"); 38 return _class_loader.resolve(); 39 } 40 41 inline bool ClassLoaderData::is_boot_class_loader_data() const { 42 return class_loader() == NULL; 43 } 44 45 inline ClassLoaderData* ClassLoaderData::class_loader_data_or_null(oop loader) { 46 if (loader == NULL) { 47 return ClassLoaderData::the_null_class_loader_data(); 48 } 49 return java_lang_ClassLoader::loader_data_acquire(loader); 50 } 51 52 inline ClassLoaderData* ClassLoaderData::class_loader_data(oop loader) { 53 ClassLoaderData* loader_data = class_loader_data_or_null(loader); 54 assert(loader_data != NULL, "Must be"); 55 return loader_data; 56 } 57 58 59 inline ClassLoaderData *ClassLoaderDataGraph::find_or_create(Handle loader) { 60 guarantee(loader() != NULL && oopDesc::is_oop(loader()), "Loader must be oop"); 61 // Gets the class loader data out of the java/lang/ClassLoader object, if non-null 62 // it's already in the loader_data, so no need to add 63 ClassLoaderData* loader_data= java_lang_ClassLoader::loader_data_acquire(loader()); 64 if (loader_data) { 65 return loader_data; 66 } 67 return ClassLoaderDataGraph::add(loader, false); 68 } 69 70 size_t ClassLoaderDataGraph::num_instance_classes() { 71 return _num_instance_classes; 72 } 73 74 size_t ClassLoaderDataGraph::num_array_classes() { 75 return _num_array_classes; 76 } 77 78 void ClassLoaderDataGraph::inc_instance_classes(size_t count) { 79 Atomic::add(count, &_num_instance_classes); 80 } 81 82 void ClassLoaderDataGraph::dec_instance_classes(size_t count) { 83 assert(count <= _num_instance_classes, "Sanity"); 84 Atomic::sub(count, &_num_instance_classes); 85 } 86 87 void ClassLoaderDataGraph::inc_array_classes(size_t count) { 88 Atomic::add(count, &_num_array_classes); 89 } 90 91 void ClassLoaderDataGraph::dec_array_classes(size_t count) { 92 assert(count <= _num_array_classes, "Sanity"); 93 Atomic::sub(count, &_num_array_classes); 94 } 95 96 bool ClassLoaderDataGraph::should_clean_metaspaces_and_reset() { 97 // Only clean metaspaces after full GC. 98 bool do_cleaning = _safepoint_cleanup_needed; 99 #if INCLUDE_JVMTI 100 do_cleaning = do_cleaning && (_should_clean_deallocate_lists || InstanceKlass::has_previous_versions()); 101 #else 102 do_cleaning = do_cleaning && _should_clean_deallocate_lists; 103 #endif 104 _safepoint_cleanup_needed = false; // reset 105 return do_cleaning; 106 } 107 108 #endif // SHARE_VM_CLASSFILE_CLASSLOADERDATA_INLINE_HPP