1 /* 2 * Copyright (c) 1997, 2010, 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_INSTANCEKLASSKLASS_HPP 26 #define SHARE_VM_OOPS_INSTANCEKLASSKLASS_HPP 27 28 #include "oops/klassKlass.hpp" 29 30 // An instanceKlassKlass is the klass of an instanceKlass 31 32 class instanceKlassKlass : public klassKlass { 33 public: 34 // Dispatched operation 35 bool oop_is_klass() const { return true; } 36 bool oop_is_instanceKlass() const { return true; } 37 38 int oop_size(oop obj) const; 39 int klass_oop_size() const { return object_size(); } 40 41 // Allocation 42 DEFINE_ALLOCATE_PERMANENT(instanceKlassKlass); 43 static klassOop create_klass(TRAPS); 44 klassOop allocate_instance_klass(int vtable_len, 45 int itable_len, 46 int static_field_size, 47 unsigned int nonstatic_oop_map_count, 48 ReferenceType rt, 49 TRAPS); 50 51 // Casting from klassOop 52 static instanceKlassKlass* cast(klassOop k) { 53 assert(k->klass_part()->oop_is_klass(), "cast to instanceKlassKlass"); 54 return (instanceKlassKlass*) k->klass_part(); 55 } 56 57 // Sizing 58 static int header_size() { return oopDesc::header_size() + sizeof(instanceKlassKlass)/HeapWordSize; } 59 int object_size() const { return align_object_size(header_size()); } 60 61 // Garbage collection 62 void oop_follow_contents(oop obj); 63 int oop_adjust_pointers(oop obj); 64 bool oop_is_parsable(oop obj) const; 65 66 // Parallel Scavenge and Parallel Old 67 PARALLEL_GC_DECLS 68 69 // Iterators 70 int oop_oop_iterate(oop obj, OopClosure* blk); 71 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); 72 73 private: 74 // Apply closure to the InstanceKlass oops that are outside the java heap. 75 inline void iterate_c_heap_oops(instanceKlass* ik, OopClosure* closure); 76 77 public: 78 // Printing 79 void oop_print_value_on(oop obj, outputStream* st); 80 #ifndef PRODUCT 81 void oop_print_on(oop obj, outputStream* st); 82 #endif 83 84 // Verification 85 const char* internal_name() const; 86 void oop_verify_on(oop obj, outputStream* st); 87 // tells whether obj is partially constructed (gc during class loading) 88 bool oop_partially_loaded(oop obj) const; 89 void oop_set_partially_loaded(oop obj); 90 }; 91 92 #endif // SHARE_VM_OOPS_INSTANCEKLASSKLASS_HPP