1 /* 2 * Copyright (c) 1997, 2011, 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(Symbol* name, 45 int vtable_len, 46 int itable_len, 47 int static_field_size, 48 unsigned int nonstatic_oop_map_count, 49 ReferenceType rt, 50 TRAPS); 51 52 // Casting from klassOop 53 static instanceKlassKlass* cast(klassOop k) { 54 assert(k->klass_part()->oop_is_klass(), "cast to instanceKlassKlass"); 55 return (instanceKlassKlass*) k->klass_part(); 56 } 57 58 // Sizing 59 static int header_size() { return oopDesc::header_size() + sizeof(instanceKlassKlass)/HeapWordSize; } 60 int object_size() const { return align_object_size(header_size()); } 61 62 // Garbage collection 63 void oop_follow_contents(oop obj); 64 int oop_adjust_pointers(oop obj); 65 bool oop_is_parsable(oop obj) const; 66 67 // Parallel Scavenge and Parallel Old 68 PARALLEL_GC_DECLS 69 70 // Iterators 71 int oop_oop_iterate(oop obj, OopClosure* blk); 72 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); 73 74 private: 75 // Apply closure to the InstanceKlass oops that are outside the java heap. 76 inline void iterate_c_heap_oops(instanceKlass* ik, OopClosure* closure); 77 78 public: 79 // Printing 80 void oop_print_value_on(oop obj, outputStream* st); 81 #ifndef PRODUCT 82 void oop_print_on(oop obj, outputStream* st); 83 #endif 84 85 // Verification 86 const char* internal_name() const; 87 void oop_verify_on(oop obj, outputStream* st); 88 // tells whether obj is partially constructed (gc during class loading) 89 bool oop_partially_loaded(oop obj) const; 90 void oop_set_partially_loaded(oop obj); 91 }; 92 93 #endif // SHARE_VM_OOPS_INSTANCEKLASSKLASS_HPP