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_KLASSKLASS_HPP 26 #define SHARE_VM_OOPS_KLASSKLASS_HPP 27 28 #include "memory/oopFactory.hpp" 29 #include "oops/klass.hpp" 30 #include "oops/klassOop.hpp" 31 32 // A klassKlass serves as the fix point of the klass chain. 33 // The klass of klassKlass is itself. 34 35 class klassKlass: public Klass { 36 friend class VMStructs; 37 private: 38 juint _alloc_size; // allocation profiling support 39 public: 40 // Testing 41 bool oop_is_klass() const { return true; } 42 bool is_leaf_class() const { return true; } 43 44 // Sizing 45 int oop_size(oop obj) const; 46 int klass_oop_size() const { return object_size(); } 47 48 // Allocation 49 DEFINE_ALLOCATE_PERMANENT(klassKlass); 50 static klassOop create_klass(TRAPS ); 51 52 // Casting from klassOop 53 static klassKlass* cast(klassOop k) { 54 assert(k->klass_part()->oop_is_klass(), "cast to klassKlass"); 55 return (klassKlass*) k->klass_part(); 56 } 57 58 // Sizing 59 static int header_size() { return oopDesc::header_size() + sizeof(klassKlass)/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 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 // Allocation profiling support 74 juint alloc_size() const { return _alloc_size; } 75 void set_alloc_size(juint n) { _alloc_size = n; } 76 77 // Printing 78 void oop_print_value_on(oop obj, outputStream* st); 79 void oop_print_on (oop obj, outputStream* st); 80 81 // Verification 82 const char* internal_name() const; 83 void oop_verify_on(oop obj, outputStream* st); 84 }; 85 86 #endif // SHARE_VM_OOPS_KLASSKLASS_HPP