Mercurial > hg > truffle
annotate src/share/vm/oops/typeArrayKlass.hpp @ 6725:da91efe96a93
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 |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_OOPS_TYPEARRAYKLASS_HPP |
| 26 #define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP | |
| 27 | |
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28 #include "classfile/classLoaderData.hpp" |
| 1972 | 29 #include "oops/arrayKlass.hpp" |
| 30 | |
| 0 | 31 // A typeArrayKlass is the klass of a typeArray |
| 32 // It contains the type and size of the elements | |
| 33 | |
| 34 class typeArrayKlass : public arrayKlass { | |
| 35 friend class VMStructs; | |
| 36 private: | |
| 37 jint _max_length; // maximum number of elements allowed in an array | |
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38 |
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39 // Constructor |
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40 typeArrayKlass(BasicType type, Symbol* name); |
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41 static typeArrayKlass* allocate(ClassLoaderData* loader_data, BasicType type, Symbol* name, TRAPS); |
| 0 | 42 public: |
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43 typeArrayKlass() {} // For dummy objects. |
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44 |
| 0 | 45 // instance variables |
| 46 jint max_length() { return _max_length; } | |
| 47 void set_max_length(jint m) { _max_length = m; } | |
| 48 | |
| 49 // testers | |
| 50 bool oop_is_typeArray_slow() const { return true; } | |
| 51 | |
| 52 // klass allocation | |
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53 static typeArrayKlass* create_klass(BasicType type, const char* name_str, |
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54 TRAPS); |
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55 static inline Klass* create_klass(BasicType type, int scale, TRAPS) { |
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56 typeArrayKlass* tak = create_klass(type, external_name(type), CHECK_NULL); |
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57 assert(scale == (1 << tak->log2_element_size()), "scale must check out"); |
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58 return tak; |
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59 } |
| 0 | 60 |
| 61 int oop_size(oop obj) const; | |
| 62 | |
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63 bool compute_is_subtype_of(Klass* k); |
| 0 | 64 |
| 65 // Allocation | |
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66 typeArrayOop allocate_common(int length, bool do_zero, TRAPS); |
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67 typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, true, THREAD); } |
| 0 | 68 oop multi_allocate(int rank, jint* sizes, TRAPS); |
| 69 | |
| 70 // Copying | |
| 71 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); | |
| 72 | |
| 73 // Iteration | |
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74 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk); |
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75 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr); |
| 0 | 76 |
| 77 // Garbage collection | |
| 78 void oop_follow_contents(oop obj); | |
| 79 int oop_adjust_pointers(oop obj); | |
| 80 | |
| 81 // Parallel Scavenge and Parallel Old | |
| 82 PARALLEL_GC_DECLS | |
| 83 | |
| 84 protected: | |
| 85 // Find n'th dimensional array | |
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86 virtual Klass* array_klass_impl(bool or_null, int n, TRAPS); |
| 0 | 87 |
| 88 // Returns the array class with this class as element type | |
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89 virtual Klass* array_klass_impl(bool or_null, TRAPS); |
| 0 | 90 |
| 91 public: | |
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92 // Casting from Klass* |
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93 static typeArrayKlass* cast(Klass* k) { |
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94 assert(k->oop_is_typeArray(), "cast to typeArrayKlass"); |
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95 return (typeArrayKlass*) k; |
| 0 | 96 } |
| 97 | |
| 98 // Naming | |
| 99 static const char* external_name(BasicType type); | |
| 100 | |
| 101 // Sizing | |
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102 static int header_size() { return sizeof(typeArrayKlass)/HeapWordSize; } |
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103 int size() const { return arrayKlass::static_size(header_size()); } |
| 0 | 104 |
| 105 // Initialization (virtual from Klass) | |
| 106 void initialize(TRAPS); | |
| 107 | |
| 108 public: | |
| 109 // Printing | |
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110 #ifndef PRODUCT |
| 0 | 111 void oop_print_on(oop obj, outputStream* st); |
| 112 #endif | |
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113 |
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114 void print_on(outputStream* st) const; |
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115 void print_value_on(outputStream* st) const; |
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116 |
| 0 | 117 public: |
| 118 const char* internal_name() const; | |
| 119 }; | |
| 1972 | 120 |
| 121 #endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP |