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comparison src/share/vm/oops/typeArrayKlass.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 a92cdbac8b9e
children d8ce2825b193
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6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 1997, 2010, 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.
23 */ 23 */
24 24
25 #ifndef SHARE_VM_OOPS_TYPEARRAYKLASS_HPP 25 #ifndef SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
26 #define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP 26 #define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
27 27
28 #include "classfile/classLoaderData.hpp"
28 #include "oops/arrayKlass.hpp" 29 #include "oops/arrayKlass.hpp"
29 30
30 // A typeArrayKlass is the klass of a typeArray 31 // A typeArrayKlass is the klass of a typeArray
31 // It contains the type and size of the elements 32 // It contains the type and size of the elements
32 33
33 class typeArrayKlass : public arrayKlass { 34 class typeArrayKlass : public arrayKlass {
34 friend class VMStructs; 35 friend class VMStructs;
35 private: 36 private:
36 jint _max_length; // maximum number of elements allowed in an array 37 jint _max_length; // maximum number of elements allowed in an array
38
39 // Constructor
40 typeArrayKlass(BasicType type, Symbol* name);
41 static typeArrayKlass* allocate(ClassLoaderData* loader_data, BasicType type, Symbol* name, TRAPS);
37 public: 42 public:
43 typeArrayKlass() {} // For dummy objects.
44
38 // instance variables 45 // instance variables
39 jint max_length() { return _max_length; } 46 jint max_length() { return _max_length; }
40 void set_max_length(jint m) { _max_length = m; } 47 void set_max_length(jint m) { _max_length = m; }
41 48
42 // testers 49 // testers
43 bool oop_is_typeArray_slow() const { return true; } 50 bool oop_is_typeArray_slow() const { return true; }
44 51
45 // klass allocation 52 // klass allocation
46 DEFINE_ALLOCATE_PERMANENT(typeArrayKlass); 53 static typeArrayKlass* create_klass(BasicType type, const char* name_str,
47 static klassOop create_klass(BasicType type, int scale, const char* name_str,
48 TRAPS); 54 TRAPS);
49 static inline klassOop create_klass(BasicType type, int scale, TRAPS) { 55 static inline Klass* create_klass(BasicType type, int scale, TRAPS) {
50 return create_klass(type, scale, external_name(type), CHECK_NULL); 56 typeArrayKlass* tak = create_klass(type, external_name(type), CHECK_NULL);
57 assert(scale == (1 << tak->log2_element_size()), "scale must check out");
58 return tak;
51 } 59 }
52 60
53 int oop_size(oop obj) const; 61 int oop_size(oop obj) const;
54 int klass_oop_size() const { return object_size(); }
55 62
56 bool compute_is_subtype_of(klassOop k); 63 bool compute_is_subtype_of(Klass* k);
57 64
58 // Allocation 65 // Allocation
59 typeArrayOop allocate_common(int length, bool do_zero, TRAPS); 66 typeArrayOop allocate_common(int length, bool do_zero, TRAPS);
60 typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, true, THREAD); } 67 typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, true, THREAD); }
61 typeArrayOop allocate_permanent(int length, TRAPS); // used for class file structures
62 oop multi_allocate(int rank, jint* sizes, TRAPS); 68 oop multi_allocate(int rank, jint* sizes, TRAPS);
63 69
64 // Copying 70 // Copying
65 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); 71 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
66 72
67 // Iteration 73 // Iteration
68 int oop_oop_iterate(oop obj, OopClosure* blk); 74 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk);
69 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); 75 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr);
70 76
71 // Garbage collection 77 // Garbage collection
72 void oop_follow_contents(oop obj); 78 void oop_follow_contents(oop obj);
73 int oop_adjust_pointers(oop obj); 79 int oop_adjust_pointers(oop obj);
74 80
75 // Parallel Scavenge and Parallel Old 81 // Parallel Scavenge and Parallel Old
76 PARALLEL_GC_DECLS 82 PARALLEL_GC_DECLS
77 83
78 protected: 84 protected:
79 // Find n'th dimensional array 85 // Find n'th dimensional array
80 virtual klassOop array_klass_impl(bool or_null, int n, TRAPS); 86 virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
81 87
82 // Returns the array class with this class as element type 88 // Returns the array class with this class as element type
83 virtual klassOop array_klass_impl(bool or_null, TRAPS); 89 virtual Klass* array_klass_impl(bool or_null, TRAPS);
84 90
85 public: 91 public:
86 // Casting from klassOop 92 // Casting from Klass*
87 static typeArrayKlass* cast(klassOop k) { 93 static typeArrayKlass* cast(Klass* k) {
88 assert(k->klass_part()->oop_is_typeArray_slow(), "cast to typeArrayKlass"); 94 assert(k->oop_is_typeArray(), "cast to typeArrayKlass");
89 return (typeArrayKlass*) k->klass_part(); 95 return (typeArrayKlass*) k;
90 } 96 }
91 97
92 // Naming 98 // Naming
93 static const char* external_name(BasicType type); 99 static const char* external_name(BasicType type);
94 100
95 // Sizing 101 // Sizing
96 static int header_size() { return oopDesc::header_size() + sizeof(typeArrayKlass)/HeapWordSize; } 102 static int header_size() { return sizeof(typeArrayKlass)/HeapWordSize; }
97 int object_size() const { return arrayKlass::object_size(header_size()); } 103 int size() const { return arrayKlass::static_size(header_size()); }
98 104
99 // Initialization (virtual from Klass) 105 // Initialization (virtual from Klass)
100 void initialize(TRAPS); 106 void initialize(TRAPS);
101 107
102 private:
103 // Helpers
104 static klassOop array_klass_impl(typeArrayKlassHandle h_this, bool or_null, int n, TRAPS);
105
106 #ifndef PRODUCT
107 public: 108 public:
108 // Printing 109 // Printing
110 #ifndef PRODUCT
109 void oop_print_on(oop obj, outputStream* st); 111 void oop_print_on(oop obj, outputStream* st);
110 #endif 112 #endif
113
114 void print_on(outputStream* st) const;
115 void print_value_on(outputStream* st) const;
116
111 public: 117 public:
112 const char* internal_name() const; 118 const char* internal_name() const;
113 }; 119 };
114 120
115 #endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP 121 #endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP