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1 /*
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2 * Copyright 1997-2007 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 // objArrayKlass is the klass for objArrays
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26
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27 class objArrayKlass : public arrayKlass {
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28 friend class VMStructs;
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29 private:
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30 klassOop _element_klass; // The klass of the elements of this array type
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31 klassOop _bottom_klass; // The one-dimensional type (instanceKlass or typeArrayKlass)
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32 public:
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33 // Instance variables
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34 klassOop element_klass() const { return _element_klass; }
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35 void set_element_klass(klassOop k) { oop_store_without_check((oop*) &_element_klass, (oop) k); }
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36 oop* element_klass_addr() { return (oop*)&_element_klass; }
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37
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38 klassOop bottom_klass() const { return _bottom_klass; }
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39 void set_bottom_klass(klassOop k) { oop_store_without_check((oop*) &_bottom_klass, (oop) k); }
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40 oop* bottom_klass_addr() { return (oop*)&_bottom_klass; }
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41
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42 // Compiler/Interpreter offset
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43 static int element_klass_offset_in_bytes() { return offset_of(objArrayKlass, _element_klass); }
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44
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45 // Dispatched operation
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46 bool can_be_primary_super_slow() const;
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47 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS);
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48 bool compute_is_subtype_of(klassOop k);
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49 bool oop_is_objArray_slow() const { return true; }
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50 int oop_size(oop obj) const;
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51 int klass_oop_size() const { return object_size(); }
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52
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53 // Allocation
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54 DEFINE_ALLOCATE_PERMANENT(objArrayKlass);
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55 objArrayOop allocate(int length, TRAPS);
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56 oop multi_allocate(int rank, jint* sizes, TRAPS);
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57
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58 // Copying
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59 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
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60
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61 // Compute protection domain
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62 oop protection_domain() { return Klass::cast(bottom_klass())->protection_domain(); }
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63 // Compute class loader
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64 oop class_loader() const { return Klass::cast(bottom_klass())->class_loader(); }
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65
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66 protected:
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67 // Returns the objArrayKlass for n'th dimension.
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68 virtual klassOop array_klass_impl(bool or_null, int n, TRAPS);
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69
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70 // Returns the array class with this class as element type.
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71 virtual klassOop array_klass_impl(bool or_null, TRAPS);
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72
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73 public:
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74 // Casting from klassOop
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75 static objArrayKlass* cast(klassOop k) {
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76 assert(k->klass_part()->oop_is_objArray_slow(), "cast to objArrayKlass");
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77 return (objArrayKlass*) k->klass_part();
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78 }
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79
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80 // Sizing
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81 static int header_size() { return oopDesc::header_size() + sizeof(objArrayKlass)/HeapWordSize; }
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82 int object_size() const { return arrayKlass::object_size(header_size()); }
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83
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84 // Initialization (virtual from Klass)
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85 void initialize(TRAPS);
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86
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87 // Garbage collection
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88 void oop_follow_contents(oop obj);
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89 int oop_adjust_pointers(oop obj);
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90
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91 // Parallel Scavenge and Parallel Old
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92 PARALLEL_GC_DECLS
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93
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94 // Iterators
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95 int oop_oop_iterate(oop obj, OopClosure* blk) {
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96 return oop_oop_iterate_v(obj, blk);
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97 }
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98 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
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99 return oop_oop_iterate_v_m(obj, blk, mr);
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100 }
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101 #define ObjArrayKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
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102 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
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103 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \
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104 MemRegion mr);
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105
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106 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
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107 ALL_OOP_OOP_ITERATE_CLOSURES_3(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
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108
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109 // JVM support
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110 jint compute_modifier_flags(TRAPS) const;
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111
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112 private:
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113 static klassOop array_klass_impl (objArrayKlassHandle this_oop, bool or_null, int n, TRAPS);
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114
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115 #ifndef PRODUCT
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116 public:
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117 // Printing
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118 void oop_print_on (oop obj, outputStream* st);
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119 void oop_print_value_on(oop obj, outputStream* st);
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120 #endif
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121
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122 public:
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123 // Verification
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124 const char* internal_name() const;
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125 void oop_verify_on(oop obj, outputStream* st);
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126 void oop_verify_old_oop(oop obj, oop* p, bool allow_dirty);
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127
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128 };
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