1 /* 2 * Copyright (c) 1997, 2009, 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 // An instanceKlassKlass is the klass of an instanceKlass 26 27 class instanceKlassKlass : public klassKlass { 28 public: 29 // Dispatched operation 30 bool oop_is_klass() const { return true; } 31 bool oop_is_instanceKlass() const { return true; } 32 33 int oop_size(oop obj) const; 34 int klass_oop_size() const { return object_size(); } 35 36 // Allocation 37 DEFINE_ALLOCATE_PERMANENT(instanceKlassKlass); 38 static klassOop create_klass(TRAPS); 39 klassOop allocate_instance_klass(int vtable_len, 40 int itable_len, 41 int static_field_size, 42 unsigned int nonstatic_oop_map_count, 43 ReferenceType rt, 44 TRAPS); 45 46 // Casting from klassOop 47 static instanceKlassKlass* cast(klassOop k) { 48 assert(k->klass_part()->oop_is_klass(), "cast to instanceKlassKlass"); 49 return (instanceKlassKlass*) k->klass_part(); 50 } 51 52 // Sizing 53 static int header_size() { return oopDesc::header_size() + sizeof(instanceKlassKlass)/HeapWordSize; } 54 int object_size() const { return align_object_size(header_size()); } 55 56 // Garbage collection 57 void oop_follow_contents(oop obj); 58 int oop_adjust_pointers(oop obj); 59 bool oop_is_parsable(oop obj) const; 60 61 // Parallel Scavenge and Parallel Old 62 PARALLEL_GC_DECLS 63 64 // Iterators 65 int oop_oop_iterate(oop obj, OopClosure* blk); 66 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); 67 68 private: 69 // Apply closure to the InstanceKlass oops that are outside the java heap. 70 inline void iterate_c_heap_oops(instanceKlass* ik, OopClosure* closure); 71 72 public: 73 // Printing 74 void oop_print_value_on(oop obj, outputStream* st); 75 #ifndef PRODUCT 76 void oop_print_on(oop obj, outputStream* st); 77 #endif 78 79 // Verification 80 const char* internal_name() const; 81 void oop_verify_on(oop obj, outputStream* st); 82 // tells whether obj is partially constructed (gc during class loading) 83 bool oop_partially_loaded(oop obj) const; 84 void oop_set_partially_loaded(oop obj); 85 };