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annotate src/share/vm/oops/typeArrayKlass.hpp @ 14649:f6301b007a16

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6498581: ThreadInterruptTest3 produces wrong output on Windows Summary: There is race condition between os::interrupt and os::is_interrupted on Windows. In JVM_Sleep(Thread.sleep), check if thread gets interrupted, it may see interrupted but not really interrupted so cause spurious waking up (early return from sleep). Fix by checking if interrupt event really gets set thus prevent false return. For intrinsic of _isInterrupted, on Windows, go fastpath only on bit not set. Reviewed-by: acorn, kvn Contributed-by: david.holmes@oracle.com, yumin.qi@oracle.com
author minqi
date Wed, 26 Feb 2014 15:20:41 -0800
parents de6a9e811145
children 4ca6dc0799b6
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1 /*
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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 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.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
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26 #define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
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27
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28 #include "classfile/classLoaderData.hpp"
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29 #include "oops/arrayKlass.hpp"
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30
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31 // A TypeArrayKlass is the klass of a typeArray
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32 // It contains the type and size of the elements
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33
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34 class TypeArrayKlass : public ArrayKlass {
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35 friend class VMStructs;
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36 private:
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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);
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42 public:
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43 TypeArrayKlass() {} // For dummy objects.
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44
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45 // instance variables
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46 jint max_length() { return _max_length; }
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47 void set_max_length(jint m) { _max_length = m; }
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48
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49 // testers
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50 bool oop_is_typeArray_slow() const { return true; }
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51
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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 }
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61 int oop_size(oop obj) const;
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62
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63 bool compute_is_subtype_of(Klass* k);
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64
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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); }
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68 oop multi_allocate(int rank, jint* sizes, TRAPS);
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69
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70 oop protection_domain() const { return NULL; }
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71
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72 // Copying
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73 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
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74
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75 // Iteration
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76 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk);
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77 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr);
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78
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79 // Garbage collection
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80 void oop_follow_contents(oop obj);
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81 int oop_adjust_pointers(oop obj);
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82
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83 // Parallel Scavenge and Parallel Old
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84 PARALLEL_GC_DECLS
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85
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86 protected:
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87 // Find n'th dimensional array
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88 virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
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89
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90 // Returns the array class with this class as element type
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91 virtual Klass* array_klass_impl(bool or_null, TRAPS);
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93 public:
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94 // Casting from Klass*
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95 static TypeArrayKlass* cast(Klass* k) {
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96 assert(k->oop_is_typeArray(), "cast to TypeArrayKlass");
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97 return (TypeArrayKlass*) k;
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98 }
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99
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100 // Naming
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101 static const char* external_name(BasicType type);
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102
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103 // Sizing
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104 static int header_size() { return sizeof(TypeArrayKlass)/HeapWordSize; }
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105 int size() const { return ArrayKlass::static_size(header_size()); }
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106
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107 // Initialization (virtual from Klass)
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108 void initialize(TRAPS);
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109
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110 public:
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111 // Printing
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112 #ifndef PRODUCT
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113 void oop_print_on(oop obj, outputStream* st);
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114 #endif
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115
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116 void print_on(outputStream* st) const;
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117 void print_value_on(outputStream* st) const;
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118
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119 public:
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120 const char* internal_name() const;
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121 };
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122
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123 #endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP