annotate src/share/vm/oops/typeArrayKlass.cpp @ 6862:8a5ea0a9ccc4

7127708: G1: change task num types from int to uint in concurrent mark Summary: Change the type of various task num fields, parameters etc to unsigned and rename them to be more consistent with the other collectors. Code changes were also reviewed by Vitaly Davidovich. Reviewed-by: johnc Contributed-by: Kaushik Srenevasan <kaushik@twitter.com>
author johnc
date Sat, 06 Oct 2012 01:17:44 -0700
parents 86af3dacab81
children 6e5a59a8e4a7
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1 /*
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2 * Copyright (c) 1997, 2012, 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 #include "precompiled.hpp"
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26 #include "classfile/symbolTable.hpp"
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27 #include "classfile/systemDictionary.hpp"
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28 #include "classfile/vmSymbols.hpp"
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29 #include "gc_interface/collectedHeap.hpp"
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30 #include "gc_interface/collectedHeap.inline.hpp"
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31 #include "memory/metadataFactory.hpp"
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32 #include "memory/resourceArea.hpp"
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33 #include "memory/universe.hpp"
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34 #include "memory/universe.inline.hpp"
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35 #include "oops/instanceKlass.hpp"
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36 #include "oops/klass.inline.hpp"
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37 #include "oops/objArrayKlass.hpp"
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38 #include "oops/oop.inline.hpp"
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39 #include "oops/typeArrayKlass.hpp"
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40 #include "oops/typeArrayOop.hpp"
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41 #include "runtime/handles.inline.hpp"
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42
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43 bool typeArrayKlass::compute_is_subtype_of(Klass* k) {
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44 if (!k->oop_is_typeArray()) {
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45 return arrayKlass::compute_is_subtype_of(k);
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46 }
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47
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48 typeArrayKlass* tak = typeArrayKlass::cast(k);
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49 if (dimension() != tak->dimension()) return false;
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50
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51 return element_type() == tak->element_type();
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52 }
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53
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54 typeArrayKlass* typeArrayKlass::create_klass(BasicType type,
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55 const char* name_str, TRAPS) {
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56 Symbol* sym = NULL;
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57 if (name_str != NULL) {
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58 sym = SymbolTable::new_permanent_symbol(name_str, CHECK_NULL);
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59 }
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60
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61 ClassLoaderData* null_loader_data = ClassLoaderData::the_null_class_loader_data();
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62
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63 typeArrayKlass* ak = typeArrayKlass::allocate(null_loader_data, type, sym, CHECK_NULL);
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64
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65 // Add all classes to our internal class loader list here,
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66 // including classes in the bootstrap (NULL) class loader.
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67 // GC walks these as strong roots.
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68 null_loader_data->add_class(ak);
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69
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70 // Call complete_create_array_klass after all instance variables have been initialized.
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71 complete_create_array_klass(ak, ak->super(), CHECK_NULL);
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72
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73 return ak;
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74 }
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75
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76 typeArrayKlass* typeArrayKlass::allocate(ClassLoaderData* loader_data, BasicType type, Symbol* name, TRAPS) {
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77 assert(typeArrayKlass::header_size() <= InstanceKlass::header_size(),
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78 "array klasses must be same size as InstanceKlass");
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79
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80 int size = arrayKlass::static_size(typeArrayKlass::header_size());
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81
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82 return new (loader_data, size, THREAD) typeArrayKlass(type, name);
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83 }
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84
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85 typeArrayKlass::typeArrayKlass(BasicType type, Symbol* name) : arrayKlass(name) {
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86 set_layout_helper(array_layout_helper(type));
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87 assert(oop_is_array(), "sanity");
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88 assert(oop_is_typeArray(), "sanity");
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89
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90 set_max_length(arrayOopDesc::max_array_length(type));
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91 assert(size() >= typeArrayKlass::header_size(), "bad size");
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92
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93 set_class_loader_data(ClassLoaderData::the_null_class_loader_data());
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94 }
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95
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96 typeArrayOop typeArrayKlass::allocate_common(int length, bool do_zero, TRAPS) {
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97 assert(log2_element_size() >= 0, "bad scale");
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98 if (length >= 0) {
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99 if (length <= max_length()) {
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100 size_t size = typeArrayOopDesc::object_size(layout_helper(), length);
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101 KlassHandle h_k(THREAD, this);
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102 typeArrayOop t;
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103 CollectedHeap* ch = Universe::heap();
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104 if (do_zero) {
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105 t = (typeArrayOop)CollectedHeap::array_allocate(h_k, (int)size, length, CHECK_NULL);
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106 } else {
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107 t = (typeArrayOop)CollectedHeap::array_allocate_nozero(h_k, (int)size, length, CHECK_NULL);
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108 }
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109 return t;
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110 } else {
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111 report_java_out_of_memory("Requested array size exceeds VM limit");
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112 JvmtiExport::post_array_size_exhausted();
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113 THROW_OOP_0(Universe::out_of_memory_error_array_size());
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114 }
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115 } else {
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116 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
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117 }
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118 }
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119
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120 oop typeArrayKlass::multi_allocate(int rank, jint* last_size, TRAPS) {
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121 // For typeArrays this is only called for the last dimension
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122 assert(rank == 1, "just checking");
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123 int length = *last_size;
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124 return allocate(length, THREAD);
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125 }
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126
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127
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128 void typeArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) {
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129 assert(s->is_typeArray(), "must be type array");
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130
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131 // Check destination
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132 if (!d->is_typeArray() || element_type() != typeArrayKlass::cast(d->klass())->element_type()) {
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133 THROW(vmSymbols::java_lang_ArrayStoreException());
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134 }
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135
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136 // Check is all offsets and lengths are non negative
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137 if (src_pos < 0 || dst_pos < 0 || length < 0) {
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138 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
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139 }
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140 // Check if the ranges are valid
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141 if ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length())
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142 || (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) {
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143 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
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144 }
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145 // Check zero copy
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146 if (length == 0)
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147 return;
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148
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149 // This is an attempt to make the copy_array fast.
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150 int l2es = log2_element_size();
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151 int ihs = array_header_in_bytes() / wordSize;
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152 char* src = (char*) ((oop*)s + ihs) + ((size_t)src_pos << l2es);
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153 char* dst = (char*) ((oop*)d + ihs) + ((size_t)dst_pos << l2es);
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154 Copy::conjoint_memory_atomic(src, dst, (size_t)length << l2es);
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155 }
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156
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157
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158 // create a klass of array holding typeArrays
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159 Klass* typeArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) {
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160 int dim = dimension();
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161 assert(dim <= n, "check order of chain");
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162 if (dim == n)
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163 return this;
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164
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165 if (higher_dimension() == NULL) {
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166 if (or_null) return NULL;
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167
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168 ResourceMark rm;
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169 JavaThread *jt = (JavaThread *)THREAD;
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170 {
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171 MutexLocker mc(Compile_lock, THREAD); // for vtables
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172 // Atomic create higher dimension and link into list
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173 MutexLocker mu(MultiArray_lock, THREAD);
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174
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175 if (higher_dimension() == NULL) {
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176 Klass* oak = objArrayKlass::allocate_objArray_klass(
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177 class_loader_data(), dim + 1, this, CHECK_NULL);
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178 objArrayKlass* h_ak = objArrayKlass::cast(oak);
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179 h_ak->set_lower_dimension(this);
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180 OrderAccess::storestore();
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181 set_higher_dimension(h_ak);
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182 assert(h_ak->oop_is_objArray(), "incorrect initialization of objArrayKlass");
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183 }
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184 }
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185 } else {
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186 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
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187 }
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188 objArrayKlass* h_ak = objArrayKlass::cast(higher_dimension());
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189 if (or_null) {
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190 return h_ak->array_klass_or_null(n);
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191 }
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192 return h_ak->array_klass(n, CHECK_NULL);
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193 }
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194
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195 Klass* typeArrayKlass::array_klass_impl(bool or_null, TRAPS) {
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196 return array_klass_impl(or_null, dimension() + 1, THREAD);
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197 }
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198
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199 int typeArrayKlass::oop_size(oop obj) const {
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200 assert(obj->is_typeArray(),"must be a type array");
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201 typeArrayOop t = typeArrayOop(obj);
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202 return t->object_size();
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203 }
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204
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205 void typeArrayKlass::oop_follow_contents(oop obj) {
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206 assert(obj->is_typeArray(),"must be a type array");
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207 // Performance tweak: We skip iterating over the klass pointer since we
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208 // know that Universe::typeArrayKlass never moves.
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209 }
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210
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211 #ifndef SERIALGC
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212 void typeArrayKlass::oop_follow_contents(ParCompactionManager* cm, oop obj) {
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213 assert(obj->is_typeArray(),"must be a type array");
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214 // Performance tweak: We skip iterating over the klass pointer since we
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215 // know that Universe::typeArrayKlass never moves.
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216 }
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217 #endif // SERIALGC
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218
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219 int typeArrayKlass::oop_adjust_pointers(oop obj) {
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220 assert(obj->is_typeArray(),"must be a type array");
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221 typeArrayOop t = typeArrayOop(obj);
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222 // Performance tweak: We skip iterating over the klass pointer since we
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223 // know that Universe::typeArrayKlass never moves.
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224 return t->object_size();
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225 }
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226
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227 int typeArrayKlass::oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
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228 assert(obj->is_typeArray(),"must be a type array");
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229 typeArrayOop t = typeArrayOop(obj);
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230 // Performance tweak: We skip iterating over the klass pointer since we
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231 // know that Universe::typeArrayKlass never moves.
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232 return t->object_size();
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233 }
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234
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235 int typeArrayKlass::oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
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236 assert(obj->is_typeArray(),"must be a type array");
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237 typeArrayOop t = typeArrayOop(obj);
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238 // Performance tweak: We skip iterating over the klass pointer since we
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239 // know that Universe::typeArrayKlass never moves.
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240 return t->object_size();
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241 }
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242
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243 #ifndef SERIALGC
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244 void typeArrayKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
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245 ShouldNotReachHere();
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246 assert(obj->is_typeArray(),"must be a type array");
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247 }
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248
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249 int
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250 typeArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
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251 assert(obj->is_typeArray(),"must be a type array");
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252 return typeArrayOop(obj)->object_size();
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253 }
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254 #endif // SERIALGC
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255
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256 void typeArrayKlass::initialize(TRAPS) {
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257 // Nothing to do. Having this function is handy since objArrayKlasses can be
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258 // initialized by calling initialize on their bottom_klass, see objArrayKlass::initialize
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259 }
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260
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261 const char* typeArrayKlass::external_name(BasicType type) {
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262 switch (type) {
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263 case T_BOOLEAN: return "[Z";
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264 case T_CHAR: return "[C";
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265 case T_FLOAT: return "[F";
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266 case T_DOUBLE: return "[D";
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267 case T_BYTE: return "[B";
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268 case T_SHORT: return "[S";
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269 case T_INT: return "[I";
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270 case T_LONG: return "[J";
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271 default: ShouldNotReachHere();
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272 }
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273 return NULL;
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274 }
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275
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276
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277 // Printing
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278
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279 void typeArrayKlass::print_on(outputStream* st) const {
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280 #ifndef PRODUCT
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281 assert(is_klass(), "must be klass");
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282 print_value_on(st);
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283 Klass::print_on(st);
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284 #endif //PRODUCT
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285 }
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286
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287 void typeArrayKlass::print_value_on(outputStream* st) const {
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288 assert(is_klass(), "must be klass");
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289 st->print("{type array ");
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290 switch (element_type()) {
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291 case T_BOOLEAN: st->print("bool"); break;
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292 case T_CHAR: st->print("char"); break;
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293 case T_FLOAT: st->print("float"); break;
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294 case T_DOUBLE: st->print("double"); break;
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295 case T_BYTE: st->print("byte"); break;
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296 case T_SHORT: st->print("short"); break;
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297 case T_INT: st->print("int"); break;
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298 case T_LONG: st->print("long"); break;
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299 default: ShouldNotReachHere();
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300 }
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301 st->print("}");
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302 }
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303
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304 #ifndef PRODUCT
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305
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306 static void print_boolean_array(typeArrayOop ta, int print_len, outputStream* st) {
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307 for (int index = 0; index < print_len; index++) {
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308 st->print_cr(" - %3d: %s", index, (ta->bool_at(index) == 0) ? "false" : "true");
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309 }
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310 }
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311
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312
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313 static void print_char_array(typeArrayOop ta, int print_len, outputStream* st) {
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314 for (int index = 0; index < print_len; index++) {
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315 jchar c = ta->char_at(index);
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316 st->print_cr(" - %3d: %x %c", index, c, isprint(c) ? c : ' ');
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317 }
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318 }
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319
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320
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321 static void print_float_array(typeArrayOop ta, int print_len, outputStream* st) {
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322 for (int index = 0; index < print_len; index++) {
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323 st->print_cr(" - %3d: %g", index, ta->float_at(index));
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324 }
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325 }
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326
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327
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328 static void print_double_array(typeArrayOop ta, int print_len, outputStream* st) {
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329 for (int index = 0; index < print_len; index++) {
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330 st->print_cr(" - %3d: %g", index, ta->double_at(index));
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331 }
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332 }
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333
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334
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335 static void print_byte_array(typeArrayOop ta, int print_len, outputStream* st) {
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336 for (int index = 0; index < print_len; index++) {
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337 jbyte c = ta->byte_at(index);
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338 st->print_cr(" - %3d: %x %c", index, c, isprint(c) ? c : ' ');
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339 }
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340 }
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341
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342
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343 static void print_short_array(typeArrayOop ta, int print_len, outputStream* st) {
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344 for (int index = 0; index < print_len; index++) {
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345 int v = ta->ushort_at(index);
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346 st->print_cr(" - %3d: 0x%x\t %d", index, v, v);
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347 }
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348 }
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349
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350
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351 static void print_int_array(typeArrayOop ta, int print_len, outputStream* st) {
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352 for (int index = 0; index < print_len; index++) {
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353 jint v = ta->int_at(index);
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354 st->print_cr(" - %3d: 0x%x %d", index, v, v);
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355 }
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356 }
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357
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358
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359 static void print_long_array(typeArrayOop ta, int print_len, outputStream* st) {
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360 for (int index = 0; index < print_len; index++) {
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361 jlong v = ta->long_at(index);
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362 st->print_cr(" - %3d: 0x%x 0x%x", index, high(v), low(v));
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363 }
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364 }
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365
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366
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367 void typeArrayKlass::oop_print_on(oop obj, outputStream* st) {
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368 arrayKlass::oop_print_on(obj, st);
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369 typeArrayOop ta = typeArrayOop(obj);
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370 int print_len = MIN2((intx) ta->length(), MaxElementPrintSize);
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371 switch (element_type()) {
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372 case T_BOOLEAN: print_boolean_array(ta, print_len, st); break;
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373 case T_CHAR: print_char_array(ta, print_len, st); break;
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374 case T_FLOAT: print_float_array(ta, print_len, st); break;
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375 case T_DOUBLE: print_double_array(ta, print_len, st); break;
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376 case T_BYTE: print_byte_array(ta, print_len, st); break;
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377 case T_SHORT: print_short_array(ta, print_len, st); break;
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378 case T_INT: print_int_array(ta, print_len, st); break;
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379 case T_LONG: print_long_array(ta, print_len, st); break;
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380 default: ShouldNotReachHere();
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381 }
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382 int remaining = ta->length() - print_len;
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383 if (remaining > 0) {
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86af3dacab81 8000227: [obj|type]ArrayKlass::oop_print_on prints one line to tty instead of the provided output stream
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384 st->print_cr(" - <%d more elements, increase MaxElementPrintSize to print>", remaining);
0
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385 }
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386 }
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387
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388 #endif // PRODUCT
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389
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390 const char* typeArrayKlass::internal_name() const {
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391 return Klass::external_name();
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392 }