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comparison src/share/vm/oops/arrayKlass.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents 069ab3f976d3
children d8ce2825b193
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6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 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 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
25 #ifndef SHARE_VM_OOPS_ARRAYKLASS_HPP 25 #ifndef SHARE_VM_OOPS_ARRAYKLASS_HPP
26 #define SHARE_VM_OOPS_ARRAYKLASS_HPP 26 #define SHARE_VM_OOPS_ARRAYKLASS_HPP
27 27
28 #include "memory/universe.hpp" 28 #include "memory/universe.hpp"
29 #include "oops/klass.hpp" 29 #include "oops/klass.hpp"
30 #include "oops/klassOop.hpp" 30
31 #include "oops/klassVtable.hpp" 31 class klassVtable;
32 32
33 // arrayKlass is the abstract baseclass for all array classes 33 // arrayKlass is the abstract baseclass for all array classes
34 34
35 class arrayKlass: public Klass { 35 class arrayKlass: public Klass {
36 friend class VMStructs; 36 friend class VMStructs;
37 private: 37 private:
38 int _dimension; // This is n'th-dimensional array. 38 int _dimension; // This is n'th-dimensional array.
39 volatile klassOop _higher_dimension; // Refers the (n+1)'th-dimensional array (if present). 39 Klass* volatile _higher_dimension; // Refers the (n+1)'th-dimensional array (if present).
40 volatile klassOop _lower_dimension; // Refers the (n-1)'th-dimensional array (if present). 40 Klass* volatile _lower_dimension; // Refers the (n-1)'th-dimensional array (if present).
41 int _vtable_len; // size of vtable for this klass 41 int _vtable_len; // size of vtable for this klass
42 juint _alloc_size; // allocation profiling support 42 juint _alloc_size; // allocation profiling support
43 oop _component_mirror; // component type, as a java/lang/Class 43 oop _component_mirror; // component type, as a java/lang/Class
44 44
45 protected:
46 // Constructors
47 // The constructor with the Symbol argument does the real array
48 // initialization, the other is a dummy
49 arrayKlass(Symbol* name);
50 arrayKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for cds"); }
51
45 public: 52 public:
46 // Testing operation 53 // Testing operation
47 bool oop_is_array() const { return true; } 54 bool oop_is_array_slow() const { return true; }
48 55
49 // Instance variables 56 // Instance variables
50 int dimension() const { return _dimension; } 57 int dimension() const { return _dimension; }
51 void set_dimension(int dimension) { _dimension = dimension; } 58 void set_dimension(int dimension) { _dimension = dimension; }
52 59
53 klassOop higher_dimension() const { return _higher_dimension; } 60 Klass* higher_dimension() const { return _higher_dimension; }
54 void set_higher_dimension(klassOop k) { oop_store_without_check((oop*) &_higher_dimension, (oop) k); } 61 void set_higher_dimension(Klass* k) { _higher_dimension = k; }
55 oop* adr_higher_dimension() { return (oop*)&this->_higher_dimension;} 62 Klass** adr_higher_dimension() { return (Klass**)&this->_higher_dimension;}
56 63
57 klassOop lower_dimension() const { return _lower_dimension; } 64 Klass* lower_dimension() const { return _lower_dimension; }
58 void set_lower_dimension(klassOop k) { oop_store_without_check((oop*) &_lower_dimension, (oop) k); } 65 void set_lower_dimension(Klass* k) { _lower_dimension = k; }
59 oop* adr_lower_dimension() { return (oop*)&this->_lower_dimension;} 66 Klass** adr_lower_dimension() { return (Klass**)&this->_lower_dimension;}
60 67
61 // Allocation profiling support 68 // Allocation profiling support
62 juint alloc_size() const { return _alloc_size; } 69 juint alloc_size() const { return _alloc_size; }
63 void set_alloc_size(juint n) { _alloc_size = n; } 70 void set_alloc_size(juint n) { _alloc_size = n; }
64 71
67 int log2_element_size() const { return layout_helper_log2_element_size(layout_helper()); } 74 int log2_element_size() const { return layout_helper_log2_element_size(layout_helper()); }
68 // type of elements (T_OBJECT for both oop arrays and array-arrays) 75 // type of elements (T_OBJECT for both oop arrays and array-arrays)
69 BasicType element_type() const { return layout_helper_element_type(layout_helper()); } 76 BasicType element_type() const { return layout_helper_element_type(layout_helper()); }
70 77
71 oop component_mirror() const { return _component_mirror; } 78 oop component_mirror() const { return _component_mirror; }
72 void set_component_mirror(oop m) { oop_store((oop*) &_component_mirror, m); } 79 void set_component_mirror(oop m) { klass_oop_store(&_component_mirror, m); }
73 oop* adr_component_mirror() { return (oop*)&this->_component_mirror;} 80 oop* adr_component_mirror() { return (oop*)&this->_component_mirror;}
74 81
75 // Compiler/Interpreter offset 82 // Compiler/Interpreter offset
76 static ByteSize component_mirror_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(arrayKlass, _component_mirror)); } 83 static ByteSize component_mirror_offset() { return in_ByteSize(offset_of(arrayKlass, _component_mirror)); }
77 84
78 virtual klassOop java_super() const;//{ return SystemDictionary::Object_klass(); } 85 virtual Klass* java_super() const;//{ return SystemDictionary::Object_klass(); }
79 86
80 // Allocation 87 // Allocation
81 // Sizes points to the first dimension of the array, subsequent dimensions 88 // Sizes points to the first dimension of the array, subsequent dimensions
82 // are always in higher memory. The callers of these set that up. 89 // are always in higher memory. The callers of these set that up.
83 virtual oop multi_allocate(int rank, jint* sizes, TRAPS); 90 virtual oop multi_allocate(int rank, jint* sizes, TRAPS);
84 objArrayOop allocate_arrayArray(int n, int length, TRAPS); 91 objArrayOop allocate_arrayArray(int n, int length, TRAPS);
85 92
86 // Lookup operations 93 // Lookup operations
87 methodOop uncached_lookup_method(Symbol* name, Symbol* signature) const; 94 Method* uncached_lookup_method(Symbol* name, Symbol* signature) const;
88 95
89 // Casting from klassOop 96 // Casting from Klass*
90 static arrayKlass* cast(klassOop k) { 97 static arrayKlass* cast(Klass* k) {
91 Klass* kp = k->klass_part(); 98 assert(k->oop_is_array(), "cast to arrayKlass");
92 assert(kp->null_vtbl() || kp->oop_is_array(), "cast to arrayKlass"); 99 return (arrayKlass*) k;
93 return (arrayKlass*) kp;
94 } 100 }
95 101
96 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS); 102 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
97 bool compute_is_subtype_of(klassOop k); 103 bool compute_is_subtype_of(Klass* k);
98 104
99 // Sizing 105 // Sizing
100 static int header_size() { return oopDesc::header_size() + sizeof(arrayKlass)/HeapWordSize; } 106 static int header_size() { return sizeof(arrayKlass)/HeapWordSize; }
101 int object_size(int header_size) const; 107 static int static_size(int header_size);
102
103 bool object_is_parsable() const { return _vtable_len > 0; }
104 108
105 // Java vtable 109 // Java vtable
106 klassVtable* vtable() const; // return new klassVtable 110 klassVtable* vtable() const; // return new klassVtable
107 int vtable_length() const { return _vtable_len; } 111 int vtable_length() const { return _vtable_len; }
108 static int base_vtable_length() { return Universe::base_vtable_size(); } 112 static int base_vtable_length() { return Universe::base_vtable_size(); }
110 protected: 114 protected:
111 inline intptr_t* start_of_vtable() const; 115 inline intptr_t* start_of_vtable() const;
112 116
113 public: 117 public:
114 // Iterators 118 // Iterators
115 void array_klasses_do(void f(klassOop k)); 119 void array_klasses_do(void f(Klass* k));
116 void with_array_klasses_do(void f(klassOop k)); 120 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS);
121 void with_array_klasses_do(void f(Klass* k));
117 122
118 // Shared creation method 123 // GC support
119 static arrayKlassHandle base_create_array_klass( 124 virtual void oops_do(OopClosure* cl);
120 const Klass_vtbl& vtbl, 125
121 int header_size, KlassHandle klass,
122 TRAPS);
123 // Return a handle. 126 // Return a handle.
124 static void complete_create_array_klass(arrayKlassHandle k, KlassHandle super_klass, TRAPS); 127 static void complete_create_array_klass(arrayKlass* k, KlassHandle super_klass, TRAPS);
128
125 129
126 // jvm support 130 // jvm support
127 jint compute_modifier_flags(TRAPS) const; 131 jint compute_modifier_flags(TRAPS) const;
128 132
129 // JVMTI support 133 // JVMTI support
130 jint jvmti_class_status() const; 134 jint jvmti_class_status() const;
131 135
136 // CDS support - remove and restore oops from metadata. Oops are not shared.
137 virtual void remove_unshareable_info();
138 virtual void restore_unshareable_info(TRAPS);
139
132 // Printing 140 // Printing
141 void print_on(outputStream* st) const;
142 void print_value_on(outputStream* st) const;
143
133 void oop_print_on(oop obj, outputStream* st); 144 void oop_print_on(oop obj, outputStream* st);
134 145
135 // Verification 146 // Verification
147 void verify_on(outputStream* st);
148
136 void oop_verify_on(oop obj, outputStream* st); 149 void oop_verify_on(oop obj, outputStream* st);
137 }; 150 };
138 151
139 #endif // SHARE_VM_OOPS_ARRAYKLASS_HPP 152 #endif // SHARE_VM_OOPS_ARRAYKLASS_HPP