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 // A constantPoolKlass is the klass of a constantPoolOop 26 27 class constantPoolKlass : public Klass { 28 juint _alloc_size; // allocation profiling support 29 public: 30 // Dispatched klass operations 31 bool oop_is_constantPool() const { return true; } 32 int oop_size(oop obj) const; 33 int klass_oop_size() const { return object_size(); } 34 35 // Allocation 36 DEFINE_ALLOCATE_PERMANENT(constantPoolKlass); 37 constantPoolOop allocate(int length, bool is_conc_safe, TRAPS); 38 static klassOop create_klass(TRAPS); 39 40 // Casting from klassOop 41 static constantPoolKlass* cast(klassOop k) { 42 assert(k->klass_part()->oop_is_constantPool(), "cast to constantPoolKlass"); 43 return (constantPoolKlass*) k->klass_part(); 44 } 45 46 // Sizing 47 static int header_size() { return oopDesc::header_size() + sizeof(constantPoolKlass)/HeapWordSize; } 48 int object_size() const { return align_object_size(header_size()); } 49 50 // Garbage collection 51 // Returns true is the object is safe for GC concurrent processing. 52 virtual bool oop_is_conc_safe(oop obj) const; 53 void oop_follow_contents(oop obj); 54 int oop_adjust_pointers(oop obj); 55 56 // Parallel Scavenge and Parallel Old 57 PARALLEL_GC_DECLS 58 59 // Iterators 60 int oop_oop_iterate(oop obj, OopClosure* blk); 61 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); 62 63 // Allocation profiling support 64 juint alloc_size() const { return _alloc_size; } 65 void set_alloc_size(juint n) { _alloc_size = n; } 66 67 // Printing 68 void oop_print_value_on(oop obj, outputStream* st); 69 void oop_print_on(oop obj, outputStream* st); 70 71 // Verification 72 const char* internal_name() const; 73 void oop_verify_on(oop obj, outputStream* st); 74 // tells whether obj is partially constructed (gc during class loading) 75 bool oop_partially_loaded(oop obj) const; 76 void oop_set_partially_loaded(oop obj); 77 #ifndef PRODUCT 78 // Compile the world support 79 static void preload_and_initialize_all_classes(oop constant_pool, TRAPS); 80 #endif 81 };