Mercurial > hg > graal-compiler

annotate src/share/vm/oops/klass.cpp @ 7212:291ffc492eb6

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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
author Doug Simon <doug.simon@oracle.com>
date Fri, 14 Dec 2012 14:35:13 +0100
parents 2cb439954abf 90273fc0a981
children 5fc51c1ecdeb
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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/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/metadataFactory.hpp"
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33 #include "memory/oopFactory.hpp"
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34 #include "memory/resourceArea.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/oop.inline2.hpp"
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38 #include "runtime/atomic.hpp"
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39 #include "utilities/stack.hpp"
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40 #ifndef SERIALGC
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41 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
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42 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp"
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43 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
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44 #endif
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45
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46 void Klass::set_name(Symbol* n) {
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47 _name = n;
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48 if (_name != NULL) _name->increment_refcount();
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49 }
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50
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51 bool Klass::is_subclass_of(Klass* k) const {
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52 // Run up the super chain and check
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53 if (this == k) return true;
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54
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55 Klass* t = const_cast<Klass*>(this)->super();
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56
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57 while (t != NULL) {
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58 if (t == k) return true;
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59 t = t->super();
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60 }
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61 return false;
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62 }
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63
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64 bool Klass::search_secondary_supers(Klass* k) const {
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65 // Put some extra logic here out-of-line, before the search proper.
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66 // This cuts down the size of the inline method.
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67
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68 // This is necessary, since I am never in my own secondary_super list.
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69 if (this == k)
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70 return true;
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71 // Scan the array-of-objects for a match
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72 int cnt = secondary_supers()->length();
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73 for (int i = 0; i < cnt; i++) {
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74 if (secondary_supers()->at(i) == k) {
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75 ((Klass*)this)->set_secondary_super_cache(k);
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76 return true;
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77 }
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78 }
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79 return false;
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80 }
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81
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82 // Return self, except for abstract classes with exactly 1
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83 // implementor. Then return the 1 concrete implementation.
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84 Klass *Klass::up_cast_abstract() {
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85 Klass *r = this;
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86 while( r->is_abstract() ) { // Receiver is abstract?
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87 Klass *s = r->subklass(); // Check for exactly 1 subklass
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88 if( !s || s->next_sibling() ) // Oops; wrong count; give up
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89 return this; // Return 'this' as a no-progress flag
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90 r = s; // Loop till find concrete class
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91 }
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92 return r; // Return the 1 concrete class
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93 }
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94
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95 // Find LCA in class hierarchy
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96 Klass *Klass::LCA( Klass *k2 ) {
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97 Klass *k1 = this;
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98 while( 1 ) {
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99 if( k1->is_subtype_of(k2) ) return k2;
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100 if( k2->is_subtype_of(k1) ) return k1;
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101 k1 = k1->super();
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102 k2 = k2->super();
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103 }
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104 }
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105
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106
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107 void Klass::check_valid_for_instantiation(bool throwError, TRAPS) {
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108 ResourceMark rm(THREAD);
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109 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError()
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110 : vmSymbols::java_lang_InstantiationException(), external_name());
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111 }
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112
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113
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114 void Klass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) {
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115 THROW(vmSymbols::java_lang_ArrayStoreException());
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116 }
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117
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118
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119 void Klass::initialize(TRAPS) {
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120 ShouldNotReachHere();
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121 }
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122
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123 bool Klass::compute_is_subtype_of(Klass* k) {
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124 assert(k->is_klass(), "argument must be a class");
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125 return is_subclass_of(k);
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126 }
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127
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128
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129 Method* Klass::uncached_lookup_method(Symbol* name, Symbol* signature) const {
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130 #ifdef ASSERT
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131 tty->print_cr("Error: uncached_lookup_method called on a klass oop."
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132 " Likely error: reflection method does not correctly"
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133 " wrap return value in a mirror object.");
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134 #endif
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135 ShouldNotReachHere();
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136 return NULL;
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137 }
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138
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139 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) {
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140 return Metaspace::allocate(loader_data, word_size, /*read_only*/false,
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141 Metaspace::ClassType, CHECK_NULL);
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142 }
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143
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144 Klass::Klass() {
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145 Klass* k = this;
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146
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147 { // Preinitialize supertype information.
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148 // A later call to initialize_supers() may update these settings:
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149 set_super(NULL);
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150 for (juint i = 0; i < Klass::primary_super_limit(); i++) {
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151 _primary_supers[i] = NULL;
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152 }
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153 set_secondary_supers(NULL);
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154 _primary_supers[0] = k;
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155 set_super_check_offset(in_bytes(primary_supers_offset()));
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156 }
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157
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158 set_java_mirror(NULL);
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159 set_modifier_flags(0);
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160 set_layout_helper(Klass::_lh_neutral_value);
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161 set_name(NULL);
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162 AccessFlags af;
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163 af.set_flags(0);
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164 set_access_flags(af);
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165 set_subklass(NULL);
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166 set_next_sibling(NULL);
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167 set_next_link(NULL);
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168 set_alloc_count(0);
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169 TRACE_SET_KLASS_TRACE_ID(this, 0);
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170
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171 set_prototype_header(markOopDesc::prototype());
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172 set_biased_lock_revocation_count(0);
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173 set_last_biased_lock_bulk_revocation_time(0);
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174
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175 // The klass doesn't have any references at this point.
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176 clear_modified_oops();
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177 clear_accumulated_modified_oops();
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178 }
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179
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180 jint Klass::array_layout_helper(BasicType etype) {
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181 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype");
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182 // Note that T_ARRAY is not allowed here.
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183 int hsize = arrayOopDesc::base_offset_in_bytes(etype);
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184 int esize = type2aelembytes(etype);
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185 bool isobj = (etype == T_OBJECT);
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186 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value;
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187 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize));
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188
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189 assert(lh < (int)_lh_neutral_value, "must look like an array layout");
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190 assert(layout_helper_is_array(lh), "correct kind");
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191 assert(layout_helper_is_objArray(lh) == isobj, "correct kind");
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192 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind");
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193 assert(layout_helper_header_size(lh) == hsize, "correct decode");
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194 assert(layout_helper_element_type(lh) == etype, "correct decode");
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195 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode");
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196
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197 return lh;
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198 }
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199
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200 bool Klass::can_be_primary_super_slow() const {
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201 if (super() == NULL)
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202 return true;
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203 else if (super()->super_depth() >= primary_super_limit()-1)
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204 return false;
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205 else
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206 return true;
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207 }
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208
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209 void Klass::initialize_supers(Klass* k, TRAPS) {
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210 if (FastSuperclassLimit == 0) {
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211 // None of the other machinery matters.
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212 set_super(k);
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213 return;
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214 }
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215 if (k == NULL) {
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216 set_super(NULL);
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217 _primary_supers[0] = this;
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218 assert(super_depth() == 0, "Object must already be initialized properly");
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219 } else if (k != super() || k == SystemDictionary::Object_klass()) {
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220 assert(super() == NULL || super() == SystemDictionary::Object_klass(),
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221 "initialize this only once to a non-trivial value");
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222 set_super(k);
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223 Klass* sup = k;
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224 int sup_depth = sup->super_depth();
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225 juint my_depth = MIN2(sup_depth + 1, (int)primary_super_limit());
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226 if (!can_be_primary_super_slow())
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227 my_depth = primary_super_limit();
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228 for (juint i = 0; i < my_depth; i++) {
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229 _primary_supers[i] = sup->_primary_supers[i];
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230 }
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231 Klass* *super_check_cell;
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232 if (my_depth < primary_super_limit()) {
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233 _primary_supers[my_depth] = this;
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234 super_check_cell = &_primary_supers[my_depth];
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235 } else {
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236 // Overflow of the primary_supers array forces me to be secondary.
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237 super_check_cell = &_secondary_super_cache;
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238 }
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239 set_super_check_offset((address)super_check_cell - (address) this);
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240
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241 #ifdef ASSERT
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242 {
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243 juint j = super_depth();
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244 assert(j == my_depth, "computed accessor gets right answer");
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245 Klass* t = this;
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246 while (!t->can_be_primary_super()) {
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247 t = t->super();
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248 j = t->super_depth();
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249 }
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250 for (juint j1 = j+1; j1 < primary_super_limit(); j1++) {
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251 assert(primary_super_of_depth(j1) == NULL, "super list padding");
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252 }
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253 while (t != NULL) {
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254 assert(primary_super_of_depth(j) == t, "super list initialization");
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255 t = t->super();
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256 --j;
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257 }
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258 assert(j == (juint)-1, "correct depth count");
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259 }
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260 #endif
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261 }
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262
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263 if (secondary_supers() == NULL) {
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264 KlassHandle this_kh (THREAD, this);
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265
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266 // Now compute the list of secondary supertypes.
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267 // Secondaries can occasionally be on the super chain,
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268 // if the inline "_primary_supers" array overflows.
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269 int extras = 0;
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270 Klass* p;
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271 for (p = super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) {
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272 ++extras;
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273 }
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274
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275 ResourceMark rm(THREAD); // need to reclaim GrowableArrays allocated below
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276
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277 // Compute the "real" non-extra secondaries.
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278 GrowableArray<Klass*>* secondaries = compute_secondary_supers(extras);
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279 if (secondaries == NULL) {
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280 // secondary_supers set by compute_secondary_supers
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281 return;
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282 }
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283
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284 GrowableArray<Klass*>* primaries = new GrowableArray<Klass*>(extras);
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285
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286 for (p = this_kh->super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) {
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287 int i; // Scan for overflow primaries being duplicates of 2nd'arys
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288
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289 // This happens frequently for very deeply nested arrays: the
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290 // primary superclass chain overflows into the secondary. The
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291 // secondary list contains the element_klass's secondaries with
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292 // an extra array dimension added. If the element_klass's
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293 // secondary list already contains some primary overflows, they
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294 // (with the extra level of array-ness) will collide with the
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295 // normal primary superclass overflows.
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296 for( i = 0; i < secondaries->length(); i++ ) {
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297 if( secondaries->at(i) == p )
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298 break;
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299 }
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300 if( i < secondaries->length() )
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301 continue; // It's a dup, don't put it in
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302 primaries->push(p);
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303 }
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304 // Combine the two arrays into a metadata object to pack the array.
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305 // The primaries are added in the reverse order, then the secondaries.
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306 int new_length = primaries->length() + secondaries->length();
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307 Array<Klass*>* s2 = MetadataFactory::new_array<Klass*>(
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308 class_loader_data(), new_length, CHECK);
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309 int fill_p = primaries->length();
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310 for (int j = 0; j < fill_p; j++) {
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311 s2->at_put(j, primaries->pop()); // add primaries in reverse order.
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312 }
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313 for( int j = 0; j < secondaries->length(); j++ ) {
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314 s2->at_put(j+fill_p, secondaries->at(j)); // add secondaries on the end.
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315 }
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316
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317 #ifdef ASSERT
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318 // We must not copy any NULL placeholders left over from bootstrap.
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319 for (int j = 0; j < s2->length(); j++) {
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320 assert(s2->at(j) != NULL, "correct bootstrapping order");
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321 }
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322 #endif
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323
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324 this_kh->set_secondary_supers(s2);
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325 }
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326 }
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327
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328 GrowableArray<Klass*>* Klass::compute_secondary_supers(int num_extra_slots) {
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329 assert(num_extra_slots == 0, "override for complex klasses");
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330 set_secondary_supers(Universe::the_empty_klass_array());
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331 return NULL;
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332 }
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333
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334
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335 Klass* Klass::subklass() const {
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336 return _subklass == NULL ? NULL : _subklass;
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337 }
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338
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339 InstanceKlass* Klass::superklass() const {
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340 assert(super() == NULL || super()->oop_is_instance(), "must be instance klass");
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341 return _super == NULL ? NULL : InstanceKlass::cast(_super);
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342 }
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343
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344 Klass* Klass::next_sibling() const {
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345 return _next_sibling == NULL ? NULL : _next_sibling;
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346 }
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347
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348 void Klass::set_subklass(Klass* s) {
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349 assert(s != this, "sanity check");
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350 _subklass = s;
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351 }
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352
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353 void Klass::set_next_sibling(Klass* s) {
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354 assert(s != this, "sanity check");
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355 _next_sibling = s;
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356 }
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357
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358 void Klass::append_to_sibling_list() {
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359 debug_only(verify();)
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360 // add ourselves to superklass' subklass list
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361 InstanceKlass* super = superklass();
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362 if (super == NULL) return; // special case: class Object
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363 assert((!super->is_interface() // interfaces cannot be supers
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364 && (super->superklass() == NULL || !is_interface())),
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365 "an interface can only be a subklass of Object");
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366 Klass* prev_first_subklass = super->subklass_oop();
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367 if (prev_first_subklass != NULL) {
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368 // set our sibling to be the superklass' previous first subklass
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369 set_next_sibling(prev_first_subklass);
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370 }
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371 // make ourselves the superklass' first subklass
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372 super->set_subklass(this);
6867
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373 debug_only(verify();)
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374 }
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375
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376 bool Klass::is_loader_alive(BoolObjectClosure* is_alive) {
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377 assert(is_metadata(), "p is not meta-data");
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378 assert(ClassLoaderDataGraph::contains((address)this), "is in the metaspace");
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379
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diff changeset
380 #ifdef ASSERT
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381 // The class is alive iff the class loader is alive.
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382 oop loader = class_loader();
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383 bool loader_alive = (loader == NULL) || is_alive->do_object_b(loader);
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384 #endif // ASSERT
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385
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386 // The class is alive if it's mirror is alive (which should be marked if the
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coleenp
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387 // loader is alive) unless it's an anoymous class.
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coleenp
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388 bool mirror_alive = is_alive->do_object_b(java_mirror());
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coleenp
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389 assert(!mirror_alive || loader_alive, "loader must be alive if the mirror is"
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coleenp
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390 " but not the other way around with anonymous classes");
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391 return mirror_alive;
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392 }
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393
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394 void Klass::clean_weak_klass_links(BoolObjectClosure* is_alive) {
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coleenp
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diff changeset
395 if (!ClassUnloading) {
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coleenp
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diff changeset
396 return;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
397 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
398
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coleenp
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diff changeset
399 Klass* root = SystemDictionary::Object_klass();
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400 Stack<Klass*, mtGC> stack;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
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401
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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402 stack.push(root);
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coleenp
parents: 6008
diff changeset
403 while (!stack.is_empty()) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
404 Klass* current = stack.pop();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
405
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406 assert(current->is_loader_alive(is_alive), "just checking, this should be live");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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407
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
408 // Find and set the first alive subklass
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coleenp
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409 Klass* sub = current->subklass_oop();
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410 while (sub != NULL && !sub->is_loader_alive(is_alive)) {
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411 #ifndef PRODUCT
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412 if (TraceClassUnloading && WizardMode) {
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413 ResourceMark rm;
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414 tty->print_cr("[Unlinking class (subclass) %s]", sub->external_name());
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415 }
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416 #endif
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417 sub = sub->next_sibling_oop();
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418 }
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419 current->set_subklass(sub);
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coleenp
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diff changeset
420 if (sub != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
421 stack.push(sub);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
422 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
423
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
424 // Find and set the first alive sibling
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
425 Klass* sibling = current->next_sibling_oop();
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coleenp
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diff changeset
426 while (sibling != NULL && !sibling->is_loader_alive(is_alive)) {
7185
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coleenp
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diff changeset
427 if (TraceClassUnloading && WizardMode) {
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diff changeset
428 ResourceMark rm;
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diff changeset
429 tty->print_cr("[Unlinking class (sibling) %s]", sibling->external_name());
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diff changeset
430 }
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431 sibling = sibling->next_sibling_oop();
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432 }
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433 current->set_next_sibling(sibling);
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434 if (sibling != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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435 stack.push(sibling);
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diff changeset
436 }
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437
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
438 // Clean the implementors list and method data.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
439 if (current->oop_is_instance()) {
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diff changeset
440 InstanceKlass* ik = InstanceKlass::cast(current);
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441 ik->clean_implementors_list(is_alive);
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442 ik->clean_method_data(is_alive);
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443 }
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444 }
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445 }
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446
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447 void Klass::klass_update_barrier_set(oop v) {
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448 record_modified_oops();
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449 }
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diff changeset
450
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451 void Klass::klass_update_barrier_set_pre(void* p, oop v) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
452 // This barrier used by G1, where it's used remember the old oop values,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
453 // so that we don't forget any objects that were live at the snapshot at
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
454 // the beginning. This function is only used when we write oops into
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
455 // Klasses. Since the Klasses are used as roots in G1, we don't have to
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
456 // do anything here.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
457 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
458
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
459 void Klass::klass_oop_store(oop* p, oop v) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
460 assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
461 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
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diff changeset
462
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
463 // do the store
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
464 if (always_do_update_barrier) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
465 klass_oop_store((volatile oop*)p, v);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
466 } else {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
467 klass_update_barrier_set_pre((void*)p, v);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
468 *p = v;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
469 klass_update_barrier_set(v);
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 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
472
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
473 void Klass::klass_oop_store(volatile oop* p, oop v) {
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coleenp
parents: 6008
diff changeset
474 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
475 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
476
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
477 klass_update_barrier_set_pre((void*)p, v);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
478 OrderAccess::release_store_ptr(p, v);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
479 klass_update_barrier_set(v);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
480 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
481
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
482 void Klass::oops_do(OopClosure* cl) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
483 cl->do_oop(&_java_mirror);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
484 }
0
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485
a61af66fc99e Initial load
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486 void Klass::remove_unshareable_info() {
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487 set_subklass(NULL);
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488 set_next_sibling(NULL);
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diff changeset
489 // Clear the java mirror
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
490 set_java_mirror(NULL);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
491 set_next_link(NULL);
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 // Null out class_loader_data because we don't share that yet.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
494 set_class_loader_data(NULL);
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495 }
a61af66fc99e Initial load
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diff changeset
496
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diff changeset
497 void Klass::restore_unshareable_info(TRAPS) {
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coleenp
parents: 6008
diff changeset
498 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
499 // Restore class_loader_data to the null class loader data
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
500 set_class_loader_data(loader_data);
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501
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diff changeset
502 // Add to null class loader list first before creating the mirror
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
503 // (same order as class file parsing)
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
504 loader_data->add_class(this);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
505
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
506 // Recreate the class mirror
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
507 java_lang_Class::create_mirror(this, CHECK);
2177
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 1972
diff changeset
508 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 1972
diff changeset
509
6725
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diff changeset
510 Klass* Klass::array_klass_or_null(int rank) {
0
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511 EXCEPTION_MARK;
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512 // No exception can be thrown by array_klass_impl when called with or_null == true.
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513 // (In anycase, the execption mark will fail if it do so)
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514 return array_klass_impl(true, rank, THREAD);
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515 }
a61af66fc99e Initial load
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diff changeset
516
a61af66fc99e Initial load
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diff changeset
517
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diff changeset
518 Klass* Klass::array_klass_or_null() {
0
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519 EXCEPTION_MARK;
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520 // No exception can be thrown by array_klass_impl when called with or_null == true.
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521 // (In anycase, the execption mark will fail if it do so)
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522 return array_klass_impl(true, THREAD);
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523 }
a61af66fc99e Initial load
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diff changeset
524
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525
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526 Klass* Klass::array_klass_impl(bool or_null, int rank, TRAPS) {
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coleenp
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527 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass");
0
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528 return NULL;
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529 }
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530
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531
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532 Klass* Klass::array_klass_impl(bool or_null, TRAPS) {
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533 fatal("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass");
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534 return NULL;
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535 }
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536
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537
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diff changeset
538 void Klass::with_array_klasses_do(void f(Klass* k)) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
539 f(this);
0
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540 }
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541
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542
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543 oop Klass::class_loader() const { return class_loader_data()->class_loader(); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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544
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545 const char* Klass::external_name() const {
431
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parents: 196
diff changeset
546 if (oop_is_instance()) {
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547 InstanceKlass* ik = (InstanceKlass*) this;
431
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
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parents: 196
diff changeset
548 if (ik->is_anonymous()) {
2416
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twisti
parents: 2177
diff changeset
549 assert(EnableInvokeDynamic, "");
7185
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
550 intptr_t hash = 0;
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
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551 if (ik->java_mirror() != NULL) {
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
552 // 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
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553 hash = ik->java_mirror()->identity_hash();
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 6983
diff changeset
554 }
431
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
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parents: 196
diff changeset
555 char hash_buf[40];
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
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parents: 196
diff changeset
556 sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash);
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
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parents: 196
diff changeset
557 size_t hash_len = strlen(hash_buf);
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
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parents: 196
diff changeset
558
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
559 size_t result_len = name()->utf8_length();
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
560 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
561 name()->as_klass_external_name(result, (int) result_len + 1);
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
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parents: 196
diff changeset
562 assert(strlen(result) == result_len, "");
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
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parents: 196
diff changeset
563 strcpy(result + result_len, hash_buf);
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
564 assert(strlen(result) == result_len + hash_len, "");
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
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parents: 196
diff changeset
565 return result;
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
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parents: 196
diff changeset
566 }
a45484ea312d 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 196
diff changeset
567 }
1039
987e948ebbc8 6815692: method handle code needs some cleanup (post-6655638)
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parents: 605
diff changeset
568 if (name() == NULL) return "<unknown>";
0
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569 return name()->as_klass_external_name();
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570 }
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571
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572
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jrose
parents: 605
diff changeset
573 const char* Klass::signature_name() const {
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parents: 605
diff changeset
574 if (name() == NULL) return "<unknown>";
0
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575 return name()->as_C_string();
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576 }
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577
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578 // Unless overridden, modifier_flags is 0.
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579 jint Klass::compute_modifier_flags(TRAPS) const {
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580 return 0;
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581 }
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582
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583 int Klass::atomic_incr_biased_lock_revocation_count() {
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584 return (int) Atomic::add(1, &_biased_lock_revocation_count);
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585 }
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586
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587 // Unless overridden, jvmti_class_status has no flags set.
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588 jint Klass::jvmti_class_status() const {
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589 return 0;
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590 }
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591
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diff changeset
592
0
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593 // Printing
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594
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diff changeset
595 void Klass::print_on(outputStream* st) const {
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coleenp
parents: 6008
diff changeset
596 ResourceMark rm;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
597 // print title
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
598 st->print("%s", internal_name());
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
599 print_address_on(st);
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diff changeset
600 st->cr();
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coleenp
parents: 6008
diff changeset
601 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
602
0
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603 void Klass::oop_print_on(oop obj, outputStream* st) {
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604 ResourceMark rm;
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605 // print title
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606 st->print_cr("%s ", internal_name());
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607 obj->print_address_on(st);
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608
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parents:
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609 if (WizardMode) {
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610 // print header
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611 obj->mark()->print_on(st);
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parents:
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612 }
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parents:
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613
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parents:
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614 // print class
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parents:
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615 st->print(" - klass: ");
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parents:
diff changeset
616 obj->klass()->print_value_on(st);
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617 st->cr();
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618 }
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619
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620 void Klass::oop_print_value_on(oop obj, outputStream* st) {
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parents:
diff changeset
621 // print title
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parents:
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622 ResourceMark rm; // Cannot print in debug mode without this
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parents:
diff changeset
623 st->print("%s", internal_name());
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624 obj->print_address_on(st);
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parents:
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625 }
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parents:
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626
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diff changeset
627
0
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628 // Verification
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diff changeset
629
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diff changeset
630 void Klass::verify_on(outputStream* st) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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parents: 6008
diff changeset
631 guarantee(!Universe::heap()->is_in_reserved(this), "Shouldn't be");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
632 guarantee(this->is_metadata(), "should be in metaspace");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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parents: 6008
diff changeset
633
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
634 assert(ClassLoaderDataGraph::contains((address)this), "Should be");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
635
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
636 guarantee(this->is_klass(),"should be klass");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
637
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
638 if (super() != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
639 guarantee(super()->is_metadata(), "should be in metaspace");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
640 guarantee(super()->is_klass(), "should be klass");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
641 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
642 if (secondary_super_cache() != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
643 Klass* ko = secondary_super_cache();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
644 guarantee(ko->is_metadata(), "should be in metaspace");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
645 guarantee(ko->is_klass(), "should be klass");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
646 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
647 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
648 Klass* ko = _primary_supers[i];
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
649 if (ko != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
650 guarantee(ko->is_metadata(), "should be in metaspace");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
651 guarantee(ko->is_klass(), "should be klass");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
652 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
653 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
654
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
655 if (java_mirror() != NULL) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
656 guarantee(java_mirror()->is_oop(), "should be instance");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
657 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
658 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6008
diff changeset
659
0
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diff changeset
660 void Klass::oop_verify_on(oop obj, outputStream* st) {
a61af66fc99e Initial load
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diff changeset
661 guarantee(obj->is_oop(), "should be oop");
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
662 guarantee(obj->klass()->is_metadata(), "should not be in Java heap");
0
a61af66fc99e Initial load
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parents:
diff changeset
663 guarantee(obj->klass()->is_klass(), "klass field is not a klass");
a61af66fc99e Initial load
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parents:
diff changeset
664 }
a61af66fc99e Initial load
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parents:
diff changeset
665
a61af66fc99e Initial load
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parents:
diff changeset
666 #ifndef PRODUCT
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parents:
diff changeset
667
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parents:
diff changeset
668 void Klass::verify_vtable_index(int i) {
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parents:
diff changeset
669 if (oop_is_instance()) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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parents: 6008
diff changeset
670 assert(i>=0 && i<((InstanceKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds");
0
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parents:
diff changeset
671 } else {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
672 assert(oop_is_array(), "Must be");
6831
d8ce2825b193 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
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parents: 6725
diff changeset
673 assert(i>=0 && i<((ArrayKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds");
0
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parents:
diff changeset
674 }
a61af66fc99e Initial load
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parents:
diff changeset
675 }
a61af66fc99e Initial load
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diff changeset
676
a61af66fc99e Initial load
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diff changeset
677 #endif