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1 /*
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2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // An instanceKlassKlass is the klass of an instanceKlass
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26
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27 class instanceKlassKlass : public klassKlass {
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28 public:
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29 // Dispatched operation
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30 bool oop_is_klass() const { return true; }
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31 bool oop_is_instanceKlass() const { return true; }
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32
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33 int oop_size(oop obj) const;
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34 int klass_oop_size() const { return object_size(); }
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35
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36 // Allocation
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37 DEFINE_ALLOCATE_PERMANENT(instanceKlassKlass);
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38 static klassOop create_klass(TRAPS);
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39 klassOop allocate_instance_klass(int vtable_len,
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40 int itable_len,
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41 int static_field_size,
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42 int nonstatic_oop_map_size,
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43 ReferenceType rt,
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44 TRAPS);
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45
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46 // Casting from klassOop
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47 static instanceKlassKlass* cast(klassOop k) {
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48 assert(k->klass_part()->oop_is_klass(), "cast to instanceKlassKlass");
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49 return (instanceKlassKlass*) k->klass_part();
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50 }
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51
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52 // Sizing
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53 static int header_size() { return oopDesc::header_size() + sizeof(instanceKlassKlass)/HeapWordSize; }
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54 int object_size() const { return align_object_size(header_size()); }
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55
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56 // Garbage collection
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57 void oop_follow_contents(oop obj);
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58 int oop_adjust_pointers(oop obj);
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59 bool oop_is_parsable(oop obj) const;
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60
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61 // Parallel Scavenge and Parallel Old
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62 PARALLEL_GC_DECLS
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63
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64 // Iterators
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65 int oop_oop_iterate(oop obj, OopClosure* blk);
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66 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
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67
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68 private:
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69 // Apply closure to the InstanceKlass oops that are outside the java heap.
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70 inline void iterate_c_heap_oops(instanceKlass* ik, OopClosure* closure);
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71
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72 #ifndef PRODUCT
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73 public:
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74 // Printing
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75 void oop_print_on(oop obj, outputStream* st);
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76 void oop_print_value_on(oop obj, outputStream* st);
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77 #endif
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78
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79 public:
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80 // Verification
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81 const char* internal_name() const;
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82 void oop_verify_on(oop obj, outputStream* st);
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83 // tells whether obj is partially constructed (gc during class loading)
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84 bool oop_partially_loaded(oop obj) const;
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85 void oop_set_partially_loaded(oop obj);
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86 };
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