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_SYMBOLKLASS_HPP 26 #define SHARE_VM_OOPS_SYMBOLKLASS_HPP 27 28 #include "oops/typeArrayKlass.hpp" 29 30 // a symbolKlass is the klass for a symbolOop 31 32 class symbolKlass : public Klass { 33 friend class VMStructs; 34 private: 35 juint _alloc_size; // allocation profiling support 36 public: 37 // Allocation 38 DEFINE_ALLOCATE_PERMANENT(symbolKlass); 39 static klassOop create_klass(TRAPS); 40 symbolOop allocate_symbol(u1* name, int len, TRAPS); // Assumes no characters larger than 0x7F 41 bool allocate_symbols(int names_count, const char** names, int* lengths, symbolOop* sym_oops, TRAPS); 42 43 // Test operation 44 bool oop_is_symbol() const { return true; } 45 46 // Casting from klassOop 47 static symbolKlass* cast(klassOop k) { 48 assert(k->klass_part()->oop_is_symbol(), "cast to symbolKlass"); 49 return (symbolKlass*) k->klass_part(); 50 } 51 52 static int header_size() { return oopDesc::header_size() + sizeof(symbolKlass)/HeapWordSize; } 53 int oop_size(oop obj) const; 54 int klass_oop_size() const { return object_size(); } 55 int object_size() const { return align_object_size(header_size()); } 56 57 // Garbage collection 58 void oop_follow_contents(oop obj); 59 int oop_adjust_pointers(oop obj); 60 bool oop_is_parsable(oop obj) const; 61 62 // Parallel Scavenge and Parallel Old 63 PARALLEL_GC_DECLS 64 65 // Allocation profiling support 66 juint alloc_size() const { return _alloc_size; } 67 void set_alloc_size(juint n) { _alloc_size = n; } 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 // 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 //PRODUCT 78 const char* internal_name() const; 79 }; 80 81 #endif // SHARE_VM_OOPS_SYMBOLKLASS_HPP