1 /* 2 * Copyright (c) 2011, 2013, 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 "precompiled.hpp" 26 #include "classfile/javaClasses.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "gc_implementation/shared/markSweep.inline.hpp" 29 #include "gc_interface/collectedHeap.inline.hpp" 30 #include "memory/genOopClosures.inline.hpp" 31 #include "memory/iterator.inline.hpp" 32 #include "memory/oopFactory.hpp" 33 #include "oops/instanceKlass.hpp" 34 #include "oops/instanceClassLoaderKlass.hpp" 35 #include "oops/instanceMirrorKlass.hpp" 36 #include "oops/instanceOop.hpp" 37 #include "oops/oop.inline.hpp" 38 #include "oops/symbol.hpp" 39 #include "runtime/handles.inline.hpp" 40 #include "utilities/macros.hpp" 41 #if INCLUDE_ALL_GCS 42 #include "gc_implementation/parNew/parOopClosures.inline.hpp" 43 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" 44 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" 45 #include "oops/oop.pcgc.inline.hpp" 46 #endif // INCLUDE_ALL_GCS 47 48 // Macro to define InstanceClassLoaderKlass::oop_oop_iterate for virtual/nonvirtual for 49 // all closures. Macros calling macros above for each oop size. 50 // Since ClassLoader objects have only a pointer to the loader_data, they are not 51 // compressed nor does the pointer move. 52 53 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix)\ 54 \ 55 int InstanceClassLoaderKlass:: \ 56 oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ 57 /* Get size before changing pointers */ \ 58 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ 59 int size = InstanceKlass::oop_oop_iterate##nv_suffix(obj, closure); \ 60 \ 61 if_do_metadata_checked(closure, nv_suffix) { \ 62 ClassLoaderData* cld = java_lang_ClassLoader::loader_data(obj); \ 63 /* cld can be null if we have a non-registered class loader. */ \ 64 if (cld != NULL) { \ 65 closure->do_class_loader_data(cld); \ 66 } \ 67 } \ 68 \ 69 return size; \ 70 } 71 72 #if INCLUDE_ALL_GCS 73 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ 74 \ 75 int InstanceClassLoaderKlass:: \ 76 oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* closure) { \ 77 /* Get size before changing pointers */ \ 78 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ 79 int size = InstanceKlass::oop_oop_iterate_backwards##nv_suffix(obj, closure); \ 80 return size; \ 81 } 82 #endif // INCLUDE_ALL_GCS 83 84 85 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ 86 \ 87 int InstanceClassLoaderKlass:: \ 88 oop_oop_iterate##nv_suffix##_m(oop obj, \ 89 OopClosureType* closure, \ 90 MemRegion mr) { \ 91 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ 92 \ 93 int size = InstanceKlass::oop_oop_iterate##nv_suffix##_m(obj, closure, mr); \ 94 \ 95 if_do_metadata_checked(closure, nv_suffix) { \ 96 if (mr.contains(obj)) { \ 97 ClassLoaderData* cld = java_lang_ClassLoader::loader_data(obj); \ 98 /* cld can be null if we have a non-registered class loader. */ \ 99 if (cld != NULL) { \ 100 closure->do_class_loader_data(cld); \ 101 } \ 102 } \ 103 } \ 104 \ 105 return size; \ 106 } 107 108 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN) 109 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN) 110 #if INCLUDE_ALL_GCS 111 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) 112 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) 113 #endif // INCLUDE_ALL_GCS 114 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN_m) 115 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN_m) 116 117 void InstanceClassLoaderKlass::oop_follow_contents(oop obj) { 118 InstanceKlass::oop_follow_contents(obj); 119 ClassLoaderData * const loader_data = java_lang_ClassLoader::loader_data(obj); 120 121 // We must NULL check here, since the class loader 122 // can be found before the loader data has been set up. 123 if(loader_data != NULL) { 124 MarkSweep::follow_class_loader(loader_data); 125 } 126 } 127 128 #if INCLUDE_ALL_GCS 129 void InstanceClassLoaderKlass::oop_follow_contents(ParCompactionManager* cm, 130 oop obj) { 131 InstanceKlass::oop_follow_contents(cm, obj); 132 ClassLoaderData * const loader_data = java_lang_ClassLoader::loader_data(obj); 133 if (loader_data != NULL) { 134 PSParallelCompact::follow_class_loader(cm, loader_data); 135 } 136 } 137 138 void InstanceClassLoaderKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { 139 InstanceKlass::oop_push_contents(pm, obj); 140 141 // This is called by the young collector. It will already have taken care of 142 // all class loader data. So, we don't have to follow the class loader -> 143 // class loader data link. 144 } 145 146 int InstanceClassLoaderKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { 147 InstanceKlass::oop_update_pointers(cm, obj); 148 return size_helper(); 149 } 150 #endif // INCLUDE_ALL_GCS 151