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_OOPS_INSTANCECLASSLOADERKLASS_HPP 26 #define SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP 27 28 #include "oops/instanceKlass.hpp" 29 #include "utilities/macros.hpp" 30 31 class ClassFileParser; 32 33 // An InstanceClassLoaderKlass is a specialization of the InstanceKlass. It does 34 // not add any field. It is added to walk the dependencies for the class loader 35 // key that this class loader points to. This is how the loader_data graph is 36 // walked and dependant class loaders are kept alive. I thought we walked 37 // the list later? 38 39 class InstanceClassLoaderKlass: public InstanceKlass { 40 friend class VMStructs; 41 friend class InstanceKlass; 42 public: 43 static const KlassID ID = InstanceClassLoaderKlassID; 44 45 private: 46 InstanceClassLoaderKlass(const ClassFileParser& parser) : InstanceKlass(parser, InstanceKlass::_misc_kind_class_loader, ID) {} 47 48 public: 49 InstanceClassLoaderKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } 50 51 // GC specific object visitors 52 // 53 #if INCLUDE_PARALLELGC 54 // Parallel Compact 55 void oop_pc_follow_contents(oop obj, ParCompactionManager* cm); 56 void oop_pc_update_pointers(oop obj, ParCompactionManager* cm); 57 #endif 58 59 // Oop fields (and metadata) iterators 60 // 61 // The InstanceClassLoaderKlass iterators also visit the CLD pointer (or mirror of anonymous klasses.) 62 63 public: 64 // Forward iteration 65 // Iterate over the oop fields and metadata. 66 template <typename T, class OopClosureType> 67 inline void oop_oop_iterate(oop obj, OopClosureType* closure); 68 69 // Reverse iteration 70 // Iterate over the oop fields and metadata. 71 template <typename T, class OopClosureType> 72 inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure); 73 74 // Bounded range iteration 75 // Iterate over the oop fields and metadata. 76 template <typename T, class OopClosureType> 77 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr); 78 }; 79 80 #endif // SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP