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annotate src/share/vm/oops/klass.cpp @ 20317:ee019285a52c

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8031323: Optionally align objects copied to survivor spaces Reviewed-by: brutisso, tschatzl
author jmasa
date Mon, 04 Aug 2014 10:48:10 -0700
parents 2c6ef90f030a
children 6e0cb14ce59b
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1 /*
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2 * Copyright (c) 1997, 2014, 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/javaClasses.hpp"
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27 #include "classfile/dictionary.hpp"
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28 #include "classfile/systemDictionary.hpp"
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29 #include "classfile/vmSymbols.hpp"
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30 #include "gc_implementation/shared/markSweep.inline.hpp"
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31 #include "gc_interface/collectedHeap.inline.hpp"
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32 #include "memory/heapInspection.hpp"
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33 #include "memory/metadataFactory.hpp"
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34 #include "memory/oopFactory.hpp"
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35 #include "memory/resourceArea.hpp"
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36 #include "oops/instanceKlass.hpp"
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37 #include "oops/klass.inline.hpp"
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38 #include "oops/oop.inline2.hpp"
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39 #include "runtime/atomic.inline.hpp"
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40 #include "runtime/orderAccess.inline.hpp"
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41 #include "trace/traceMacros.hpp"
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42 #include "utilities/stack.hpp"
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43 #include "utilities/macros.hpp"
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44 #if INCLUDE_ALL_GCS
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45 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
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46 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
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47 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp"
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48 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
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49 #endif // INCLUDE_ALL_GCS
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50
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51 void Klass::set_name(Symbol* n) {
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52 _name = n;
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53 if (_name != NULL) _name->increment_refcount();
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54 }
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55
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56 bool Klass::is_subclass_of(const Klass* k) const {
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57 // Run up the super chain and check
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58 if (this == k) return true;
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59
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60 Klass* t = const_cast<Klass*>(this)->super();
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61
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62 while (t != NULL) {
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63 if (t == k) return true;
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64 t = t->super();
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65 }
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66 return false;
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67 }
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68
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69 bool Klass::search_secondary_supers(Klass* k) const {
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70 // Put some extra logic here out-of-line, before the search proper.
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71 // This cuts down the size of the inline method.
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72
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73 // This is necessary, since I am never in my own secondary_super list.
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74 if (this == k)
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75 return true;
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76 // Scan the array-of-objects for a match
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77 int cnt = secondary_supers()->length();
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78 for (int i = 0; i < cnt; i++) {
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79 if (secondary_supers()->at(i) == k) {
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80 ((Klass*)this)->set_secondary_super_cache(k);
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81 return true;
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82 }
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83 }
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84 return false;
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85 }
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86
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87 // Return self, except for abstract classes with exactly 1
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88 // implementor. Then return the 1 concrete implementation.
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89 Klass *Klass::up_cast_abstract() {
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90 Klass *r = this;
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91 while( r->is_abstract() ) { // Receiver is abstract?
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92 Klass *s = r->subklass(); // Check for exactly 1 subklass
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93 if( !s || s->next_sibling() ) // Oops; wrong count; give up
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94 return this; // Return 'this' as a no-progress flag
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95 r = s; // Loop till find concrete class
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96 }
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97 return r; // Return the 1 concrete class
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98 }
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99
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100 // Find LCA in class hierarchy
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101 Klass *Klass::LCA( Klass *k2 ) {
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102 Klass *k1 = this;
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103 while( 1 ) {
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104 if( k1->is_subtype_of(k2) ) return k2;
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105 if( k2->is_subtype_of(k1) ) return k1;
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106 k1 = k1->super();
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107 k2 = k2->super();
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108 }
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109 }
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110
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111
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112 void Klass::check_valid_for_instantiation(bool throwError, TRAPS) {
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113 ResourceMark rm(THREAD);
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114 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError()
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115 : vmSymbols::java_lang_InstantiationException(), external_name());
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116 }
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117
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118
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119 void Klass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) {
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120 THROW(vmSymbols::java_lang_ArrayStoreException());
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121 }
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122
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123
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124 void Klass::initialize(TRAPS) {
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125 ShouldNotReachHere();
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126 }
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127
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128 bool Klass::compute_is_subtype_of(Klass* k) {
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129 assert(k->is_klass(), "argument must be a class");
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130 return is_subclass_of(k);
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131 }
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132
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133
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134 Method* Klass::uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const {
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135 #ifdef ASSERT
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136 tty->print_cr("Error: uncached_lookup_method called on a klass oop."
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137 " Likely error: reflection method does not correctly"
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138 " wrap return value in a mirror object.");
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139 #endif
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140 ShouldNotReachHere();
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141 return NULL;
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142 }
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143
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144 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw() {
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145 return Metaspace::allocate(loader_data, word_size, /*read_only*/false,
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146 MetaspaceObj::ClassType, CHECK_NULL);
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147 }
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148
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149 Klass::Klass() {
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150 Klass* k = this;
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151
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152 // Preinitialize supertype information.
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153 // A later call to initialize_supers() may update these settings:
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154 set_super(NULL);
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155 for (juint i = 0; i < Klass::primary_super_limit(); i++) {
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156 _primary_supers[i] = NULL;
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157 }
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158 set_secondary_supers(NULL);
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159 set_secondary_super_cache(NULL);
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160 _primary_supers[0] = k;
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161 set_super_check_offset(in_bytes(primary_supers_offset()));
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162
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163 // The constructor is used from init_self_patching_vtbl_list,
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164 // which doesn't zero out the memory before calling the constructor.
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165 // Need to set the field explicitly to not hit an assert that the field
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166 // should be NULL before setting it.
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167 _java_mirror = NULL;
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168
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169 set_modifier_flags(0);
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170 set_layout_helper(Klass::_lh_neutral_value);
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171 set_name(NULL);
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172 AccessFlags af;
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173 af.set_flags(0);
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174 set_access_flags(af);
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175 set_subklass(NULL);
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176 set_next_sibling(NULL);
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177 set_next_link(NULL);
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178 TRACE_INIT_ID(this);
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179
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180 set_prototype_header(markOopDesc::prototype());
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181 set_biased_lock_revocation_count(0);
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182 set_last_biased_lock_bulk_revocation_time(0);
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183
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184 // The klass doesn't have any references at this point.
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185 clear_modified_oops();
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186 clear_accumulated_modified_oops();
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187 }
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188
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189 jint Klass::array_layout_helper(BasicType etype) {
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190 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype");
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191 // Note that T_ARRAY is not allowed here.
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192 int hsize = arrayOopDesc::base_offset_in_bytes(etype);
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193 int esize = type2aelembytes(etype);
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194 bool isobj = (etype == T_OBJECT);
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195 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value;
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196 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize));
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197
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198 assert(lh < (int)_lh_neutral_value, "must look like an array layout");
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199 assert(layout_helper_is_array(lh), "correct kind");
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200 assert(layout_helper_is_objArray(lh) == isobj, "correct kind");
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201 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind");
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202 assert(layout_helper_header_size(lh) == hsize, "correct decode");
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203 assert(layout_helper_element_type(lh) == etype, "correct decode");
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204 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode");
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205
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206 return lh;
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207 }
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208
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209 bool Klass::can_be_primary_super_slow() const {
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210 if (super() == NULL)
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211 return true;
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212 else if (super()->super_depth() >= primary_super_limit()-1)
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213 return false;
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214 else
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215 return true;
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216 }
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217
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218 void Klass::initialize_supers(Klass* k, TRAPS) {
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219 if (FastSuperclassLimit == 0) {
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220 // None of the other machinery matters.
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221 set_super(k);
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222 return;
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223 }
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224 if (k == NULL) {
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225 set_super(NULL);
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226 _primary_supers[0] = this;
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227 assert(super_depth() == 0, "Object must already be initialized properly");
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228 } else if (k != super() || k == SystemDictionary::Object_klass()) {
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229 assert(super() == NULL || super() == SystemDictionary::Object_klass(),
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230 "initialize this only once to a non-trivial value");
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231 set_super(k);
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232 Klass* sup = k;
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233 int sup_depth = sup->super_depth();
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234 juint my_depth = MIN2(sup_depth + 1, (int)primary_super_limit());
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235 if (!can_be_primary_super_slow())
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236 my_depth = primary_super_limit();
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237 for (juint i = 0; i < my_depth; i++) {
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238 _primary_supers[i] = sup->_primary_supers[i];
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239 }
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240 Klass* *super_check_cell;
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241 if (my_depth < primary_super_limit()) {
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242 _primary_supers[my_depth] = this;
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243 super_check_cell = &_primary_supers[my_depth];
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244 } else {
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245 // Overflow of the primary_supers array forces me to be secondary.
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246 super_check_cell = &_secondary_super_cache;
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247 }
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248 set_super_check_offset((address)super_check_cell - (address) this);
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249
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250 #ifdef ASSERT
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251 {
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252 juint j = super_depth();
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253 assert(j == my_depth, "computed accessor gets right answer");
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254 Klass* t = this;
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255 while (!t->can_be_primary_super()) {
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256 t = t->super();
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257 j = t->super_depth();
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258 }
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259 for (juint j1 = j+1; j1 < primary_super_limit(); j1++) {
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260 assert(primary_super_of_depth(j1) == NULL, "super list padding");
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261 }
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262 while (t != NULL) {
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263 assert(primary_super_of_depth(j) == t, "super list initialization");
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264 t = t->super();
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265 --j;
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266 }
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267 assert(j == (juint)-1, "correct depth count");
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268 }
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269 #endif
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270 }
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271
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272 if (secondary_supers() == NULL) {
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273 KlassHandle this_kh (THREAD, this);
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274
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275 // Now compute the list of secondary supertypes.
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276 // Secondaries can occasionally be on the super chain,
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277 // if the inline "_primary_supers" array overflows.
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278 int extras = 0;
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279 Klass* p;
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280 for (p = super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) {
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281 ++extras;
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282 }
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283
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284 ResourceMark rm(THREAD); // need to reclaim GrowableArrays allocated below
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285
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286 // Compute the "real" non-extra secondaries.
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287 GrowableArray<Klass*>* secondaries = compute_secondary_supers(extras);
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288 if (secondaries == NULL) {
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289 // secondary_supers set by compute_secondary_supers
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290 return;
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291 }
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292
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293 GrowableArray<Klass*>* primaries = new GrowableArray<Klass*>(extras);
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294
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295 for (p = this_kh->super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) {
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296 int i; // Scan for overflow primaries being duplicates of 2nd'arys
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297
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298 // This happens frequently for very deeply nested arrays: the
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299 // primary superclass chain overflows into the secondary. The
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300 // secondary list contains the element_klass's secondaries with
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301 // an extra array dimension added. If the element_klass's
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302 // secondary list already contains some primary overflows, they
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303 // (with the extra level of array-ness) will collide with the
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304 // normal primary superclass overflows.
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305 for( i = 0; i < secondaries->length(); i++ ) {
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306 if( secondaries->at(i) == p )
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307 break;
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308 }
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309 if( i < secondaries->length() )
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310 continue; // It's a dup, don't put it in
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311 primaries->push(p);
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312 }
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313 // Combine the two arrays into a metadata object to pack the array.
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314 // The primaries are added in the reverse order, then the secondaries.
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315 int new_length = primaries->length() + secondaries->length();
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316 Array<Klass*>* s2 = MetadataFactory::new_array<Klass*>(
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317 class_loader_data(), new_length, CHECK);
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318 int fill_p = primaries->length();
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319 for (int j = 0; j < fill_p; j++) {
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320 s2->at_put(j, primaries->pop()); // add primaries in reverse order.
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321 }
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322 for( int j = 0; j < secondaries->length(); j++ ) {
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323 s2->at_put(j+fill_p, secondaries->at(j)); // add secondaries on the end.
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324 }
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325
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326 #ifdef ASSERT
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327 // We must not copy any NULL placeholders left over from bootstrap.
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328 for (int j = 0; j < s2->length(); j++) {
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329 assert(s2->at(j) != NULL, "correct bootstrapping order");
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330 }
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331 #endif
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332
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333 this_kh->set_secondary_supers(s2);
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334 }
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335 }
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336
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337 GrowableArray<Klass*>* Klass::compute_secondary_supers(int num_extra_slots) {
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338 assert(num_extra_slots == 0, "override for complex klasses");
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339 set_secondary_supers(Universe::the_empty_klass_array());
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340 return NULL;
0
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341 }
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342
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343
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344 Klass* Klass::subklass() const {
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345 return _subklass == NULL ? NULL : _subklass;
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346 }
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347
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348 InstanceKlass* Klass::superklass() const {
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349 assert(super() == NULL || super()->oop_is_instance(), "must be instance klass");
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350 return _super == NULL ? NULL : InstanceKlass::cast(_super);
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351 }
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352
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353 Klass* Klass::next_sibling() const {
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354 return _next_sibling == NULL ? NULL : _next_sibling;
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355 }
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356
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357 void Klass::set_subklass(Klass* s) {
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358 assert(s != this, "sanity check");
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359 _subklass = s;
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360 }
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361
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diff changeset
362 void Klass::set_next_sibling(Klass* s) {
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coleenp
parents: 6008
diff changeset
363 assert(s != this, "sanity check");
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coleenp
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diff changeset
364 _next_sibling = s;
0
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365 }
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366
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367 void Klass::append_to_sibling_list() {
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bdb5f8c9978b 7199068: NPG: SharedSkipVerify is meaningless
coleenp
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diff changeset
368 debug_only(verify();)
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369 // add ourselves to superklass' subklass list
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370 InstanceKlass* super = superklass();
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371 if (super == NULL) return; // special case: class Object
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coleenp
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diff changeset
372 assert((!super->is_interface() // interfaces cannot be supers
0
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373 && (super->superklass() == NULL || !is_interface())),
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374 "an interface can only be a subklass of Object");
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375 Klass* prev_first_subklass = super->subklass_oop();
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376 if (prev_first_subklass != NULL) {
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377 // set our sibling to be the superklass' previous first subklass
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378 set_next_sibling(prev_first_subklass);
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379 }
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380 // make ourselves the superklass' first subklass
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381 super->set_subklass(this);
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382 debug_only(verify();)
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383 }
a61af66fc99e Initial load
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384
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385 bool Klass::is_loader_alive(BoolObjectClosure* is_alive) {
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coleenp
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386 #ifdef ASSERT
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387 // The class is alive iff the class loader is alive.
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coleenp
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388 oop loader = class_loader();
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coleenp
parents: 6983
diff changeset
389 bool loader_alive = (loader == NULL) || is_alive->do_object_b(loader);
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coleenp
parents: 6983
diff changeset
390 #endif // ASSERT
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coleenp
parents: 6983
diff changeset
391
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coleenp
parents: 6983
diff changeset
392 // The class is alive if it's mirror is alive (which should be marked if the
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
393 // loader is alive) unless it's an anoymous class.
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coleenp
parents: 6983
diff changeset
394 bool mirror_alive = is_alive->do_object_b(java_mirror());
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
395 assert(!mirror_alive || loader_alive, "loader must be alive if the mirror is"
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
396 " but not the other way around with anonymous classes");
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
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diff changeset
397 return mirror_alive;
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diff changeset
398 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
399
20278
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents: 20262
diff changeset
400 void Klass::clean_weak_klass_links(BoolObjectClosure* is_alive, bool clean_alive_klasses) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
401 if (!ClassUnloading) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
402 return;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
403 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
404
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
405 Klass* root = SystemDictionary::Object_klass();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
406 Stack<Klass*, mtGC> stack;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
407
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
408 stack.push(root);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
409 while (!stack.is_empty()) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
410 Klass* current = stack.pop();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
411
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
412 assert(current->is_loader_alive(is_alive), "just checking, this should be live");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
413
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
414 // Find and set the first alive subklass
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
415 Klass* sub = current->subklass_oop();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
416 while (sub != NULL && !sub->is_loader_alive(is_alive)) {
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417 #ifndef PRODUCT
7185
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coleenp
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diff changeset
418 if (TraceClassUnloading && WizardMode) {
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
419 ResourceMark rm;
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da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
420 tty->print_cr("[Unlinking class (subclass) %s]", sub->external_name());
7185
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
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diff changeset
421 }
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422 #endif
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diff changeset
423 sub = sub->next_sibling_oop();
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424 }
6725
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coleenp
parents: 6008
diff changeset
425 current->set_subklass(sub);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
426 if (sub != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
427 stack.push(sub);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
428 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
429
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
430 // Find and set the first alive sibling
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
431 Klass* sibling = current->next_sibling_oop();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
432 while (sibling != NULL && !sibling->is_loader_alive(is_alive)) {
7185
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
433 if (TraceClassUnloading && WizardMode) {
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
434 ResourceMark rm;
6725
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diff changeset
435 tty->print_cr("[Unlinking class (sibling) %s]", sibling->external_name());
7185
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
436 }
6725
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diff changeset
437 sibling = sibling->next_sibling_oop();
7185
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
438 }
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
439 current->set_next_sibling(sibling);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
440 if (sibling != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
441 stack.push(sibling);
7185
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
442 }
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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parents: 6008
diff changeset
443
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
444 // Clean the implementors list and method data.
20278
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
445 if (clean_alive_klasses && current->oop_is_instance()) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
446 InstanceKlass* ik = InstanceKlass::cast(current);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
447 ik->clean_implementors_list(is_alive);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
448 ik->clean_method_data(is_alive);
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449 }
a61af66fc99e Initial load
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parents:
diff changeset
450 }
a61af66fc99e Initial load
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parents:
diff changeset
451 }
a61af66fc99e Initial load
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parents:
diff changeset
452
6725
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coleenp
parents: 6008
diff changeset
453 void Klass::klass_update_barrier_set(oop v) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
454 record_modified_oops();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
455 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
456
20278
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
457 // This barrier is used by G1 to remember the old oop values, so
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
458 // that we don't forget any objects that were live at the snapshot at
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
459 // the beginning. This function is only used when we write oops into Klasses.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
460 void Klass::klass_update_barrier_set_pre(oop* p, oop v) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
461 #if INCLUDE_ALL_GCS
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
462 if (UseG1GC) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
463 oop obj = *p;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
464 if (obj != NULL) {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
465 G1SATBCardTableModRefBS::enqueue(obj);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
466 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
467 }
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
468 #endif
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
469 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
470
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
471 void Klass::klass_oop_store(oop* p, oop v) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
472 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
473 assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
474
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
475 // do the store
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
476 if (always_do_update_barrier) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
477 klass_oop_store((volatile oop*)p, v);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
478 } else {
20278
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
479 klass_update_barrier_set_pre(p, v);
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
480 *p = v;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
481 klass_update_barrier_set(v);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
482 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
483 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
484
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
485 void Klass::klass_oop_store(volatile oop* p, oop v) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
486 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
487 assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
488
20278
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 20262
diff changeset
489 klass_update_barrier_set_pre((oop*)p, v); // Cast away volatile.
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
490 OrderAccess::release_store_ptr(p, v);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
491 klass_update_barrier_set(v);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
492 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
493
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
494 void Klass::oops_do(OopClosure* cl) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
495 cl->do_oop(&_java_mirror);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
496 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
497
a61af66fc99e Initial load
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parents:
diff changeset
498 void Klass::remove_unshareable_info() {
17883
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
499 assert (DumpSharedSpaces, "only called for DumpSharedSpaces");
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
500
0
a61af66fc99e Initial load
duke
parents:
diff changeset
501 set_subklass(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
502 set_next_sibling(NULL);
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
503 // Clear the java mirror
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
504 set_java_mirror(NULL);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
505 set_next_link(NULL);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
506
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
507 // Null out class_loader_data because we don't share that yet.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
508 set_class_loader_data(NULL);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
509 }
a61af66fc99e Initial load
duke
parents:
diff changeset
510
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
511 void Klass::restore_unshareable_info(TRAPS) {
17916
34862ced4a87 8041723: Event Based tracing ids to be reassigned for CDS klasses
mgronlun
parents: 17889
diff changeset
512 TRACE_INIT_ID(this);
17883
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
513 // If an exception happened during CDS restore, some of these fields may already be
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
514 // set. We leave the class on the CLD list, even if incomplete so that we don't
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
515 // modify the CLD list outside a safepoint.
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
516 if (class_loader_data() == NULL) {
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
517 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
518 // Restore class_loader_data to the null class loader data
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
519 set_class_loader_data(loader_data);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
520
17883
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
521 // Add to null class loader list first before creating the mirror
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
522 // (same order as class file parsing)
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
523 loader_data->add_class(this);
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
524 }
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
525
10343
6bd680e9ea35 8003421: NPG: Move oops out of InstanceKlass into mirror
coleenp
parents: 10265
diff changeset
526 // Recreate the class mirror. The protection_domain is always null for
6bd680e9ea35 8003421: NPG: Move oops out of InstanceKlass into mirror
coleenp
parents: 10265
diff changeset
527 // boot loader, for now.
17883
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
528 // Only recreate it if not present. A previous attempt to restore may have
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
529 // gotten an OOM later but keep the mirror if it was created.
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
530 if (java_mirror() == NULL) {
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
531 java_lang_Class::create_mirror(this, Handle(NULL), CHECK);
9428a0b94204 8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
coleenp
parents: 17674
diff changeset
532 }
2177
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 1972
diff changeset
533 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 1972
diff changeset
534
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
535 Klass* Klass::array_klass_or_null(int rank) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
536 EXCEPTION_MARK;
a61af66fc99e Initial load
duke
parents:
diff changeset
537 // No exception can be thrown by array_klass_impl when called with or_null == true.
a61af66fc99e Initial load
duke
parents:
diff changeset
538 // (In anycase, the execption mark will fail if it do so)
a61af66fc99e Initial load
duke
parents:
diff changeset
539 return array_klass_impl(true, rank, THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
540 }
a61af66fc99e Initial load
duke
parents:
diff changeset
541
a61af66fc99e Initial load
duke
parents:
diff changeset
542
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
543 Klass* Klass::array_klass_or_null() {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
544 EXCEPTION_MARK;
a61af66fc99e Initial load
duke
parents:
diff changeset
545 // No exception can be thrown by array_klass_impl when called with or_null == true.
a61af66fc99e Initial load
duke
parents:
diff changeset
546 // (In anycase, the execption mark will fail if it do so)
a61af66fc99e Initial load
duke
parents:
diff changeset
547 return array_klass_impl(true, THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
548 }
a61af66fc99e Initial load
duke
parents:
diff changeset
549
a61af66fc99e Initial load
duke
parents:
diff changeset
550
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
551 Klass* Klass::array_klass_impl(bool or_null, int rank, TRAPS) {
6831
d8ce2825b193 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 6725
diff changeset
552 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass");
0
a61af66fc99e Initial load
duke
parents:
diff changeset
553 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
554 }
a61af66fc99e Initial load
duke
parents:
diff changeset
555
a61af66fc99e Initial load
duke
parents:
diff changeset
556
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
557 Klass* Klass::array_klass_impl(bool or_null, TRAPS) {
6831
d8ce2825b193 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 6725
diff changeset
558 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass");
0
a61af66fc99e Initial load
duke
parents:
diff changeset
559 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
560 }
a61af66fc99e Initial load
duke
parents:
diff changeset
561
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
562 oop Klass::class_loader() const { return class_loader_data()->class_loader(); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
563
0
a61af66fc99e Initial load
duke
parents:
diff changeset
564 const char* Klass::external_name() const {
431
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
565 if (oop_is_instance()) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
566 InstanceKlass* ik = (InstanceKlass*) this;
431
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
567 if (ik->is_anonymous()) {
2416
38fea01eb669 6817525: turn on method handle functionality by default for JSR 292
twisti
parents: 2177
diff changeset
568 assert(EnableInvokeDynamic, "");
7185
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
569 intptr_t hash = 0;
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
570 if (ik->java_mirror() != NULL) {
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
571 // java_mirror might not be created yet, return 0 as hash.
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
572 hash = ik->java_mirror()->identity_hash();
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
573 }
431
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
574 char hash_buf[40];
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
575 sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash);
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
576 size_t hash_len = strlen(hash_buf);
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
577
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
578 size_t result_len = name()->utf8_length();
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
579 char* result = NEW_RESOURCE_ARRAY(char, result_len + hash_len + 1);
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
580 name()->as_klass_external_name(result, (int) result_len + 1);
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
581 assert(strlen(result) == result_len, "");
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
582 strcpy(result + result_len, hash_buf);
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
583 assert(strlen(result) == result_len + hash_len, "");
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
584 return result;
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
585 }
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
586 }
1039
987e948ebbc8 6815692: method handle code needs some cleanup (post-6655638)
jrose
parents: 605
diff changeset
587 if (name() == NULL) return "<unknown>";
0
a61af66fc99e Initial load
duke
parents:
diff changeset
588 return name()->as_klass_external_name();
a61af66fc99e Initial load
duke
parents:
diff changeset
589 }
a61af66fc99e Initial load
duke
parents:
diff changeset
590
a61af66fc99e Initial load
duke
parents:
diff changeset
591
1039
987e948ebbc8 6815692: method handle code needs some cleanup (post-6655638)
jrose
parents: 605
diff changeset
592 const char* Klass::signature_name() const {
987e948ebbc8 6815692: method handle code needs some cleanup (post-6655638)
jrose
parents: 605
diff changeset
593 if (name() == NULL) return "<unknown>";
0
a61af66fc99e Initial load
duke
parents:
diff changeset
594 return name()->as_C_string();
a61af66fc99e Initial load
duke
parents:
diff changeset
595 }
a61af66fc99e Initial load
duke
parents:
diff changeset
596
a61af66fc99e Initial load
duke
parents:
diff changeset
597 // Unless overridden, modifier_flags is 0.
a61af66fc99e Initial load
duke
parents:
diff changeset
598 jint Klass::compute_modifier_flags(TRAPS) const {
a61af66fc99e Initial load
duke
parents:
diff changeset
599 return 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
600 }
a61af66fc99e Initial load
duke
parents:
diff changeset
601
a61af66fc99e Initial load
duke
parents:
diff changeset
602 int Klass::atomic_incr_biased_lock_revocation_count() {
a61af66fc99e Initial load
duke
parents:
diff changeset
603 return (int) Atomic::add(1, &_biased_lock_revocation_count);
a61af66fc99e Initial load
duke
parents:
diff changeset
604 }
a61af66fc99e Initial load
duke
parents:
diff changeset
605
a61af66fc99e Initial load
duke
parents:
diff changeset
606 // Unless overridden, jvmti_class_status has no flags set.
a61af66fc99e Initial load
duke
parents:
diff changeset
607 jint Klass::jvmti_class_status() const {
a61af66fc99e Initial load
duke
parents:
diff changeset
608 return 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
609 }
a61af66fc99e Initial load
duke
parents:
diff changeset
610
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
611
0
a61af66fc99e Initial load
duke
parents:
diff changeset
612 // Printing
a61af66fc99e Initial load
duke
parents:
diff changeset
613
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
614 void Klass::print_on(outputStream* st) const {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
615 ResourceMark rm;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
616 // print title
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
617 st->print("%s", internal_name());
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
618 print_address_on(st);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
619 st->cr();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
620 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
621
0
a61af66fc99e Initial load
duke
parents:
diff changeset
622 void Klass::oop_print_on(oop obj, outputStream* st) {
a61af66fc99e Initial load
duke
parents:
diff changeset
623 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
624 // print title
a61af66fc99e Initial load
duke
parents:
diff changeset
625 st->print_cr("%s ", internal_name());
a61af66fc99e Initial load
duke
parents:
diff changeset
626 obj->print_address_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
627
a61af66fc99e Initial load
duke
parents:
diff changeset
628 if (WizardMode) {
a61af66fc99e Initial load
duke
parents:
diff changeset
629 // print header
a61af66fc99e Initial load
duke
parents:
diff changeset
630 obj->mark()->print_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
631 }
a61af66fc99e Initial load
duke
parents:
diff changeset
632
a61af66fc99e Initial load
duke
parents:
diff changeset
633 // print class
a61af66fc99e Initial load
duke
parents:
diff changeset
634 st->print(" - klass: ");
a61af66fc99e Initial load
duke
parents:
diff changeset
635 obj->klass()->print_value_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
636 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
637 }
a61af66fc99e Initial load
duke
parents:
diff changeset
638
a61af66fc99e Initial load
duke
parents:
diff changeset
639 void Klass::oop_print_value_on(oop obj, outputStream* st) {
a61af66fc99e Initial load
duke
parents:
diff changeset
640 // print title
a61af66fc99e Initial load
duke
parents:
diff changeset
641 ResourceMark rm; // Cannot print in debug mode without this
a61af66fc99e Initial load
duke
parents:
diff changeset
642 st->print("%s", internal_name());
a61af66fc99e Initial load
duke
parents:
diff changeset
643 obj->print_address_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
644 }
a61af66fc99e Initial load
duke
parents:
diff changeset
645
7956
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
646 #if INCLUDE_SERVICES
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
647 // Size Statistics
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
648 void Klass::collect_statistics(KlassSizeStats *sz) const {
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
649 sz->_klass_bytes = sz->count(this);
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
650 sz->_mirror_bytes = sz->count(java_mirror());
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
651 sz->_secondary_supers_bytes = sz->count_array(secondary_supers());
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
652
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
653 sz->_ro_bytes += sz->_secondary_supers_bytes;
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
654 sz->_rw_bytes += sz->_klass_bytes + sz->_mirror_bytes;
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
655 }
16fb9f942703 6479360: PrintClassHistogram improvements
acorn
parents: 7185
diff changeset
656 #endif // INCLUDE_SERVICES
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
657
0
a61af66fc99e Initial load
duke
parents:
diff changeset
658 // Verification
a61af66fc99e Initial load
duke
parents:
diff changeset
659
17674
85318d1fe8fe 8027146: Class loading verification failure if GC occurs in Universe::flush_dependents_on
coleenp
parents: 17663
diff changeset
660 void Klass::verify_on(outputStream* st) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
661
11034
e0c9a1d29eb4 8016325: JVM hangs verifying system dictionary
coleenp
parents: 10405
diff changeset
662 // This can be expensive, but it is worth checking that this klass is actually
e0c9a1d29eb4 8016325: JVM hangs verifying system dictionary
coleenp
parents: 10405
diff changeset
663 // in the CLD graph but not in production.
17935
7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents: 17916
diff changeset
664 assert(Metaspace::contains((address)this), "Should be");
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
665
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
666 guarantee(this->is_klass(),"should be klass");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
667
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
668 if (super() != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
669 guarantee(super()->is_klass(), "should be klass");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
670 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
671 if (secondary_super_cache() != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
672 Klass* ko = secondary_super_cache();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
673 guarantee(ko->is_klass(), "should be klass");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
674 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
675 for ( uint i = 0; i < primary_super_limit(); i++ ) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
676 Klass* ko = _primary_supers[i];
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
677 if (ko != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
678 guarantee(ko->is_klass(), "should be klass");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
679 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
680 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
681
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
682 if (java_mirror() != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
683 guarantee(java_mirror()->is_oop(), "should be instance");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
684 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
685 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
686
0
a61af66fc99e Initial load
duke
parents:
diff changeset
687 void Klass::oop_verify_on(oop obj, outputStream* st) {
a61af66fc99e Initial load
duke
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diff changeset
688 guarantee(obj->is_oop(), "should be oop");
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689 guarantee(obj->klass()->is_klass(), "klass field is not a klass");
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690 }
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691
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692 #ifndef PRODUCT
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693
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694 bool Klass::verify_vtable_index(int i) {
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695 if (oop_is_instance()) {
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696 int limit = ((InstanceKlass*)this)->vtable_length()/vtableEntry::size();
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697 assert(i >= 0 && i < limit, err_msg("index %d out of bounds %d", i, limit));
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698 } else {
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699 assert(oop_is_array(), "Must be");
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700 int limit = ((ArrayKlass*)this)->vtable_length()/vtableEntry::size();
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701 assert(i >= 0 && i < limit, err_msg("index %d out of bounds %d", i, limit));
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702 }
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703 return true;
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704 }
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705
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706 bool Klass::verify_itable_index(int i) {
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707 assert(oop_is_instance(), "");
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708 int method_count = klassItable::method_count_for_interface(this);
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709 assert(i >= 0 && i < method_count, "index out of bounds");
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710 return true;
0
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711 }
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712
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713 #endif
20262
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714
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715 /////////////// Unit tests ///////////////
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716
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717 #ifndef PRODUCT
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718
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719 class TestKlass {
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720 public:
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721 static void test_oop_is_instanceClassLoader() {
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722 assert(SystemDictionary::ClassLoader_klass()->oop_is_instanceClassLoader(), "assert");
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723 assert(!SystemDictionary::String_klass()->oop_is_instanceClassLoader(), "assert");
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724 }
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725 };
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726
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727 void TestKlass_test() {
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728 TestKlass::test_oop_is_instanceClassLoader();
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729 }
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730
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731 #endif