Mercurial > hg > truffle
annotate src/share/vm/oops/constantPool.cpp @ 8178:67ee3325c285
added support for node lowering to set the fixed node for the next node to be lowered
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 08 Mar 2013 13:54:41 +0100 |
parents | 5fc51c1ecdeb |
children | b9a918201d47 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "classfile/classLoaderData.hpp" |
1972 | 27 #include "classfile/javaClasses.hpp" |
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28 #include "classfile/metadataOnStackMark.hpp" |
1972 | 29 #include "classfile/symbolTable.hpp" |
30 #include "classfile/systemDictionary.hpp" | |
31 #include "classfile/vmSymbols.hpp" | |
32 #include "interpreter/linkResolver.hpp" | |
7956 | 33 #include "memory/heapInspection.hpp" |
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34 #include "memory/metadataFactory.hpp" |
1972 | 35 #include "memory/oopFactory.hpp" |
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36 #include "oops/constantPool.hpp" |
1972 | 37 #include "oops/instanceKlass.hpp" |
38 #include "oops/objArrayKlass.hpp" | |
39 #include "runtime/fieldType.hpp" | |
40 #include "runtime/init.hpp" | |
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41 #include "runtime/javaCalls.hpp" |
1972 | 42 #include "runtime/signature.hpp" |
43 #include "runtime/vframe.hpp" | |
0 | 44 |
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45 ConstantPool* ConstantPool::allocate(ClassLoaderData* loader_data, int length, TRAPS) { |
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46 // Tags are RW but comment below applies to tags also. |
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47 Array<u1>* tags = MetadataFactory::new_writeable_array<u1>(loader_data, length, 0, CHECK_NULL); |
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48 |
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49 int size = ConstantPool::size(length); |
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50 |
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51 // CDS considerations: |
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52 // Allocate read-write but may be able to move to read-only at dumping time |
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53 // if all the klasses are resolved. The only other field that is writable is |
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54 // the resolved_references array, which is recreated at startup time. |
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55 // But that could be moved to InstanceKlass (although a pain to access from |
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56 // assembly code). Maybe it could be moved to the cpCache which is RW. |
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57 return new (loader_data, size, false, THREAD) ConstantPool(tags); |
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58 } |
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59 |
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60 ConstantPool::ConstantPool(Array<u1>* tags) { |
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61 set_length(tags->length()); |
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62 set_tags(NULL); |
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63 set_cache(NULL); |
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64 set_reference_map(NULL); |
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65 set_resolved_references(NULL); |
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66 set_operands(NULL); |
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67 set_pool_holder(NULL); |
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68 set_flags(0); |
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69 |
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70 // only set to non-zero if constant pool is merged by RedefineClasses |
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71 set_version(0); |
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72 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock")); |
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73 |
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74 // initialize tag array |
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75 int length = tags->length(); |
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76 for (int index = 0; index < length; index++) { |
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77 tags->at_put(index, JVM_CONSTANT_Invalid); |
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78 } |
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79 set_tags(tags); |
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80 } |
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81 |
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82 void ConstantPool::deallocate_contents(ClassLoaderData* loader_data) { |
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83 MetadataFactory::free_metadata(loader_data, cache()); |
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84 set_cache(NULL); |
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85 MetadataFactory::free_array<jushort>(loader_data, operands()); |
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86 set_operands(NULL); |
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87 |
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88 release_C_heap_structures(); |
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89 |
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90 // free tag array |
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91 MetadataFactory::free_array<u1>(loader_data, tags()); |
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92 set_tags(NULL); |
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93 } |
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94 |
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95 void ConstantPool::release_C_heap_structures() { |
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96 // walk constant pool and decrement symbol reference counts |
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97 unreference_symbols(); |
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98 |
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99 delete _lock; |
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100 set_lock(NULL); |
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101 } |
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102 |
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103 objArrayOop ConstantPool::resolved_references() const { |
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104 return (objArrayOop)JNIHandles::resolve(_resolved_references); |
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105 } |
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106 |
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107 // Create resolved_references array and mapping array for original cp indexes |
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108 // The ldc bytecode was rewritten to have the resolved reference array index so need a way |
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109 // to map it back for resolving and some unlikely miscellaneous uses. |
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110 // The objects created by invokedynamic are appended to this list. |
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111 void ConstantPool::initialize_resolved_references(ClassLoaderData* loader_data, |
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112 intStack reference_map, |
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113 int constant_pool_map_length, |
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114 TRAPS) { |
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115 // Initialized the resolved object cache. |
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116 int map_length = reference_map.length(); |
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117 if (map_length > 0) { |
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118 // Only need mapping back to constant pool entries. The map isn't used for |
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119 // invokedynamic resolved_reference entries. The constant pool cache index |
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120 // has the mapping back to both the constant pool and to the resolved |
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121 // reference index. |
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122 if (constant_pool_map_length > 0) { |
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123 Array<u2>* om = MetadataFactory::new_array<u2>(loader_data, map_length, CHECK); |
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124 |
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125 for (int i = 0; i < constant_pool_map_length; i++) { |
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126 int x = reference_map.at(i); |
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127 assert(x == (int)(jushort) x, "klass index is too big"); |
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128 om->at_put(i, (jushort)x); |
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129 } |
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130 set_reference_map(om); |
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131 } |
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132 |
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133 // Create Java array for holding resolved strings, methodHandles, |
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134 // methodTypes, invokedynamic and invokehandle appendix objects, etc. |
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135 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK); |
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136 Handle refs_handle (THREAD, (oop)stom); // must handleize. |
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137 set_resolved_references(loader_data->add_handle(refs_handle)); |
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138 } |
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139 } |
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140 |
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141 // CDS support. Create a new resolved_references array. |
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142 void ConstantPool::restore_unshareable_info(TRAPS) { |
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143 |
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144 // restore the C++ vtable from the shared archive |
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145 restore_vtable(); |
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146 |
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147 if (SystemDictionary::Object_klass_loaded()) { |
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148 // Recreate the object array and add to ClassLoaderData. |
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149 int map_length = resolved_reference_length(); |
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150 if (map_length > 0) { |
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151 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK); |
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152 Handle refs_handle (THREAD, (oop)stom); // must handleize. |
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153 |
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154 ClassLoaderData* loader_data = pool_holder()->class_loader_data(); |
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155 set_resolved_references(loader_data->add_handle(refs_handle)); |
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156 } |
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157 |
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158 // Also need to recreate the mutex. Make sure this matches the constructor |
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159 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock")); |
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160 } |
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161 } |
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162 |
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163 void ConstantPool::remove_unshareable_info() { |
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164 // Resolved references are not in the shared archive. |
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165 // Save the length for restoration. It is not necessarily the same length |
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166 // as reference_map.length() if invokedynamic is saved. |
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167 set_resolved_reference_length( |
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168 resolved_references() != NULL ? resolved_references()->length() : 0); |
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169 set_resolved_references(NULL); |
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170 set_lock(NULL); |
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171 } |
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172 |
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173 int ConstantPool::cp_to_object_index(int cp_index) { |
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174 // this is harder don't do this so much. |
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175 for (int i = 0; i< reference_map()->length(); i++) { |
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176 if (reference_map()->at(i) == cp_index) return i; |
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177 // Zero entry is divider between constant pool indices for strings, |
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178 // method handles and method types. After that the index is a constant |
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179 // pool cache index for invokedynamic. Stop when zero (which can never |
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180 // be a constant pool index) |
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181 if (reference_map()->at(i) == 0) break; |
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182 } |
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183 // We might not find the index. |
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184 return _no_index_sentinel; |
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185 } |
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186 |
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187 Klass* ConstantPool::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) { |
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188 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*. |
0 | 189 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and |
190 // tag is not updated atomicly. | |
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191 |
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192 CPSlot entry = this_oop->slot_at(which); |
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193 if (entry.is_resolved()) { |
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194 assert(entry.get_klass()->is_klass(), "must be"); |
0 | 195 // Already resolved - return entry. |
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196 return entry.get_klass(); |
0 | 197 } |
198 | |
199 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object | |
200 // already has updated the object | |
201 assert(THREAD->is_Java_thread(), "must be a Java thread"); | |
202 bool do_resolve = false; | |
203 bool in_error = false; | |
204 | |
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205 // Create a handle for the mirror. This will preserve the resolved class |
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206 // until the loader_data is registered. |
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207 Handle mirror_handle; |
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208 |
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209 Symbol* name = NULL; |
0 | 210 Handle loader; |
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211 { MonitorLockerEx ml(this_oop->lock()); |
0 | 212 |
213 if (this_oop->tag_at(which).is_unresolved_klass()) { | |
214 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
215 in_error = true; | |
216 } else { | |
217 do_resolve = true; | |
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218 name = this_oop->unresolved_klass_at(which); |
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219 loader = Handle(THREAD, this_oop->pool_holder()->class_loader()); |
0 | 220 } |
221 } | |
222 } // unlocking constantPool | |
223 | |
224 | |
225 // The original attempt to resolve this constant pool entry failed so find the | |
226 // original error and throw it again (JVMS 5.4.3). | |
227 if (in_error) { | |
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228 Symbol* error = SystemDictionary::find_resolution_error(this_oop, which); |
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229 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table"); |
0 | 230 ResourceMark rm; |
231 // exception text will be the class name | |
232 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
233 THROW_MSG_0(error, className); | |
234 } | |
235 | |
236 if (do_resolve) { | |
237 // this_oop must be unlocked during resolve_or_fail | |
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238 oop protection_domain = this_oop->pool_holder()->protection_domain(); |
0 | 239 Handle h_prot (THREAD, protection_domain); |
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240 Klass* k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD); |
0 | 241 KlassHandle k; |
242 if (!HAS_PENDING_EXCEPTION) { | |
243 k = KlassHandle(THREAD, k_oop); | |
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244 // preserve the resolved klass. |
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245 mirror_handle = Handle(THREAD, k_oop->java_mirror()); |
0 | 246 // Do access check for klasses |
247 verify_constant_pool_resolve(this_oop, k, THREAD); | |
248 } | |
249 | |
250 // Failed to resolve class. We must record the errors so that subsequent attempts | |
251 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3). | |
252 if (HAS_PENDING_EXCEPTION) { | |
253 ResourceMark rm; | |
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254 Symbol* error = PENDING_EXCEPTION->klass()->name(); |
0 | 255 |
256 bool throw_orig_error = false; | |
257 { | |
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258 MonitorLockerEx ml(this_oop->lock()); |
0 | 259 |
260 // some other thread has beaten us and has resolved the class. | |
261 if (this_oop->tag_at(which).is_klass()) { | |
262 CLEAR_PENDING_EXCEPTION; | |
263 entry = this_oop->resolved_klass_at(which); | |
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264 return entry.get_klass(); |
0 | 265 } |
266 | |
267 if (!PENDING_EXCEPTION-> | |
1142 | 268 is_a(SystemDictionary::LinkageError_klass())) { |
0 | 269 // Just throw the exception and don't prevent these classes from |
270 // being loaded due to virtual machine errors like StackOverflow | |
271 // and OutOfMemoryError, etc, or if the thread was hit by stop() | |
272 // Needs clarification to section 5.4.3 of the VM spec (see 6308271) | |
273 } | |
274 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
275 SystemDictionary::add_resolution_error(this_oop, which, error); | |
276 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError); | |
277 } else { | |
278 // some other thread has put the class in error state. | |
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279 error = SystemDictionary::find_resolution_error(this_oop, which); |
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280 assert(error != NULL, "checking"); |
0 | 281 throw_orig_error = true; |
282 } | |
283 } // unlocked | |
284 | |
285 if (throw_orig_error) { | |
286 CLEAR_PENDING_EXCEPTION; | |
287 ResourceMark rm; | |
288 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
289 THROW_MSG_0(error, className); | |
290 } | |
291 | |
292 return 0; | |
293 } | |
294 | |
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295 if (TraceClassResolution && !k()->oop_is_array()) { |
0 | 296 // skip resolving the constant pool so that this code get's |
297 // called the next time some bytecodes refer to this class. | |
298 ResourceMark rm; | |
299 int line_number = -1; | |
300 const char * source_file = NULL; | |
301 if (JavaThread::current()->has_last_Java_frame()) { | |
302 // try to identify the method which called this function. | |
303 vframeStream vfst(JavaThread::current()); | |
304 if (!vfst.at_end()) { | |
305 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
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306 Symbol* s = vfst.method()->method_holder()->source_file_name(); |
0 | 307 if (s != NULL) { |
308 source_file = s->as_C_string(); | |
309 } | |
310 } | |
311 } | |
312 if (k() != this_oop->pool_holder()) { | |
313 // only print something if the classes are different | |
314 if (source_file != NULL) { | |
315 tty->print("RESOLVE %s %s %s:%d\n", | |
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316 this_oop->pool_holder()->external_name(), |
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317 InstanceKlass::cast(k())->external_name(), source_file, line_number); |
0 | 318 } else { |
319 tty->print("RESOLVE %s %s\n", | |
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320 this_oop->pool_holder()->external_name(), |
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321 InstanceKlass::cast(k())->external_name()); |
0 | 322 } |
323 } | |
324 return k(); | |
325 } else { | |
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326 MonitorLockerEx ml(this_oop->lock()); |
0 | 327 // Only updated constant pool - if it is resolved. |
328 do_resolve = this_oop->tag_at(which).is_unresolved_klass(); | |
329 if (do_resolve) { | |
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330 ClassLoaderData* this_key = this_oop->pool_holder()->class_loader_data(); |
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331 this_key->record_dependency(k(), CHECK_NULL); // Can throw OOM |
0 | 332 this_oop->klass_at_put(which, k()); |
333 } | |
334 } | |
335 } | |
336 | |
337 entry = this_oop->resolved_klass_at(which); | |
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338 assert(entry.is_resolved() && entry.get_klass()->is_klass(), "must be resolved at this point"); |
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339 return entry.get_klass(); |
0 | 340 } |
341 | |
342 | |
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343 // Does not update ConstantPool* - to avoid any exception throwing. Used |
0 | 344 // by compiler and exception handling. Also used to avoid classloads for |
345 // instanceof operations. Returns NULL if the class has not been loaded or | |
346 // if the verification of constant pool failed | |
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347 Klass* ConstantPool::klass_at_if_loaded(constantPoolHandle this_oop, int which) { |
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348 CPSlot entry = this_oop->slot_at(which); |
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349 if (entry.is_resolved()) { |
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350 assert(entry.get_klass()->is_klass(), "must be"); |
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351 return entry.get_klass(); |
0 | 352 } else { |
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353 assert(entry.is_unresolved(), "must be either symbol or klass"); |
0 | 354 Thread *thread = Thread::current(); |
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355 Symbol* name = entry.get_symbol(); |
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356 oop loader = this_oop->pool_holder()->class_loader(); |
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357 oop protection_domain = this_oop->pool_holder()->protection_domain(); |
0 | 358 Handle h_prot (thread, protection_domain); |
359 Handle h_loader (thread, loader); | |
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360 Klass* k = SystemDictionary::find(name, h_loader, h_prot, thread); |
0 | 361 |
362 if (k != NULL) { | |
363 // Make sure that resolving is legal | |
364 EXCEPTION_MARK; | |
365 KlassHandle klass(THREAD, k); | |
366 // return NULL if verification fails | |
367 verify_constant_pool_resolve(this_oop, klass, THREAD); | |
368 if (HAS_PENDING_EXCEPTION) { | |
369 CLEAR_PENDING_EXCEPTION; | |
370 return NULL; | |
371 } | |
372 return klass(); | |
373 } else { | |
374 return k; | |
375 } | |
376 } | |
377 } | |
378 | |
379 | |
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380 Klass* ConstantPool::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) { |
0 | 381 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which)); |
382 } | |
383 | |
384 | |
385 // This is an interface for the compiler that allows accessing non-resolved entries | |
386 // in the constant pool - but still performs the validations tests. Must be used | |
387 // in a pre-parse of the compiler - to determine what it can do and not do. | |
388 // Note: We cannot update the ConstantPool from the vm_thread. | |
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389 Klass* ConstantPool::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) { |
0 | 390 int which = this_oop->klass_ref_index_at(index); |
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391 CPSlot entry = this_oop->slot_at(which); |
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392 if (entry.is_resolved()) { |
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393 assert(entry.get_klass()->is_klass(), "must be"); |
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394 return entry.get_klass(); |
0 | 395 } else { |
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396 assert(entry.is_unresolved(), "must be either symbol or klass"); |
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397 Symbol* name = entry.get_symbol(); |
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398 oop loader = this_oop->pool_holder()->class_loader(); |
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399 oop protection_domain = this_oop->pool_holder()->protection_domain(); |
0 | 400 Handle h_loader(THREAD, loader); |
401 Handle h_prot (THREAD, protection_domain); | |
402 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD)); | |
403 | |
404 // Do access check for klasses | |
405 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL); | |
406 return k(); | |
407 } | |
408 } | |
409 | |
410 | |
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411 Method* ConstantPool::method_at_if_loaded(constantPoolHandle cpool, |
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412 int which) { |
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413 if (cpool->cache() == NULL) return NULL; // nothing to load yet |
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414 int cache_index = decode_cpcache_index(which, true); |
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415 if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) { |
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416 // FIXME: should be an assert |
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417 if (PrintMiscellaneous && (Verbose||WizardMode)) { |
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418 tty->print_cr("bad operand %d in:", which); cpool->print(); |
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419 } |
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420 return NULL; |
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421 } |
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422 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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423 return e->method_if_resolved(cpool); |
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424 } |
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425 |
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426 |
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427 bool ConstantPool::has_appendix_at_if_loaded(constantPoolHandle cpool, int which) { |
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428 if (cpool->cache() == NULL) return false; // nothing to load yet |
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429 int cache_index = decode_cpcache_index(which, true); |
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430 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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431 return e->has_appendix(); |
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432 } |
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433 |
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434 oop ConstantPool::appendix_at_if_loaded(constantPoolHandle cpool, int which) { |
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435 if (cpool->cache() == NULL) return NULL; // nothing to load yet |
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436 int cache_index = decode_cpcache_index(which, true); |
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437 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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438 return e->appendix_if_resolved(cpool); |
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439 } |
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440 |
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441 |
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442 bool ConstantPool::has_method_type_at_if_loaded(constantPoolHandle cpool, int which) { |
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443 if (cpool->cache() == NULL) return false; // nothing to load yet |
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444 int cache_index = decode_cpcache_index(which, true); |
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445 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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446 return e->has_method_type(); |
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447 } |
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448 |
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449 oop ConstantPool::method_type_at_if_loaded(constantPoolHandle cpool, int which) { |
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450 if (cpool->cache() == NULL) return NULL; // nothing to load yet |
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451 int cache_index = decode_cpcache_index(which, true); |
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452 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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453 return e->method_type_if_resolved(cpool); |
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454 } |
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455 |
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456 |
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457 Symbol* ConstantPool::impl_name_ref_at(int which, bool uncached) { |
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458 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
0 | 459 return symbol_at(name_index); |
460 } | |
461 | |
462 | |
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463 Symbol* ConstantPool::impl_signature_ref_at(int which, bool uncached) { |
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464 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
0 | 465 return symbol_at(signature_index); |
466 } | |
467 | |
468 | |
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469 int ConstantPool::impl_name_and_type_ref_index_at(int which, bool uncached) { |
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470 int i = which; |
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471 if (!uncached && cache() != NULL) { |
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472 if (ConstantPool::is_invokedynamic_index(which)) { |
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473 // Invokedynamic index is index into resolved_references |
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474 int pool_index = invokedynamic_cp_cache_entry_at(which)->constant_pool_index(); |
2460 | 475 pool_index = invoke_dynamic_name_and_type_ref_index_at(pool_index); |
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476 assert(tag_at(pool_index).is_name_and_type(), ""); |
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477 return pool_index; |
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478 } |
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479 // change byte-ordering and go via cache |
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480 i = remap_instruction_operand_from_cache(which); |
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481 } else { |
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482 if (tag_at(which).is_invoke_dynamic()) { |
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483 int pool_index = invoke_dynamic_name_and_type_ref_index_at(which); |
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484 assert(tag_at(pool_index).is_name_and_type(), ""); |
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485 return pool_index; |
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486 } |
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487 } |
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488 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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489 assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above"); |
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490 jint ref_index = *int_at_addr(i); |
0 | 491 return extract_high_short_from_int(ref_index); |
492 } | |
493 | |
494 | |
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495 int ConstantPool::impl_klass_ref_index_at(int which, bool uncached) { |
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496 guarantee(!ConstantPool::is_invokedynamic_index(which), |
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497 "an invokedynamic instruction does not have a klass"); |
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498 int i = which; |
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499 if (!uncached && cache() != NULL) { |
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500 // change byte-ordering and go via cache |
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501 i = remap_instruction_operand_from_cache(which); |
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502 } |
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503 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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504 jint ref_index = *int_at_addr(i); |
0 | 505 return extract_low_short_from_int(ref_index); |
506 } | |
507 | |
508 | |
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509 |
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510 int ConstantPool::remap_instruction_operand_from_cache(int operand) { |
1565 | 511 int cpc_index = operand; |
512 DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG); | |
513 assert((int)(u2)cpc_index == cpc_index, "clean u2"); | |
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514 int member_index = cache()->entry_at(cpc_index)->constant_pool_index(); |
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515 return member_index; |
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516 } |
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517 |
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518 |
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519 void ConstantPool::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { |
0 | 520 if (k->oop_is_instance() || k->oop_is_objArray()) { |
521 instanceKlassHandle holder (THREAD, this_oop->pool_holder()); | |
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522 Klass* elem_oop = k->oop_is_instance() ? k() : ObjArrayKlass::cast(k())->bottom_klass(); |
0 | 523 KlassHandle element (THREAD, elem_oop); |
524 | |
525 // The element type could be a typeArray - we only need the access check if it is | |
526 // an reference to another class | |
527 if (element->oop_is_instance()) { | |
528 LinkResolver::check_klass_accessability(holder, element, CHECK); | |
529 } | |
530 } | |
531 } | |
532 | |
533 | |
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534 int ConstantPool::name_ref_index_at(int which_nt) { |
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535 jint ref_index = name_and_type_at(which_nt); |
0 | 536 return extract_low_short_from_int(ref_index); |
537 } | |
538 | |
539 | |
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540 int ConstantPool::signature_ref_index_at(int which_nt) { |
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541 jint ref_index = name_and_type_at(which_nt); |
0 | 542 return extract_high_short_from_int(ref_index); |
543 } | |
544 | |
545 | |
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546 Klass* ConstantPool::klass_ref_at(int which, TRAPS) { |
0 | 547 return klass_at(klass_ref_index_at(which), CHECK_NULL); |
548 } | |
549 | |
550 | |
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551 Symbol* ConstantPool::klass_name_at(int which) { |
0 | 552 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), |
553 "Corrupted constant pool"); | |
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554 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*. |
0 | 555 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and |
556 // tag is not updated atomicly. | |
2177
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557 CPSlot entry = slot_at(which); |
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558 if (entry.is_resolved()) { |
0 | 559 // Already resolved - return entry's name. |
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560 assert(entry.get_klass()->is_klass(), "must be"); |
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561 return entry.get_klass()->name(); |
0 | 562 } else { |
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563 assert(entry.is_unresolved(), "must be either symbol or klass"); |
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564 return entry.get_symbol(); |
0 | 565 } |
566 } | |
567 | |
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568 Symbol* ConstantPool::klass_ref_at_noresolve(int which) { |
0 | 569 jint ref_index = klass_ref_index_at(which); |
570 return klass_at_noresolve(ref_index); | |
571 } | |
572 | |
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573 Symbol* ConstantPool::uncached_klass_ref_at_noresolve(int which) { |
1602 | 574 jint ref_index = uncached_klass_ref_index_at(which); |
575 return klass_at_noresolve(ref_index); | |
576 } | |
577 | |
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578 char* ConstantPool::string_at_noresolve(int which) { |
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579 Symbol* s = unresolved_string_at(which); |
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580 if (s == NULL) { |
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581 return (char*)"<pseudo-string>"; |
0 | 582 } else { |
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583 return unresolved_string_at(which)->as_C_string(); |
0 | 584 } |
585 } | |
586 | |
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587 BasicType ConstantPool::basic_type_for_signature_at(int which) { |
0 | 588 return FieldType::basic_type(symbol_at(which)); |
589 } | |
590 | |
591 | |
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592 void ConstantPool::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { |
0 | 593 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused |
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594 if (this_oop->tag_at(index).is_string()) { |
0 | 595 this_oop->string_at(index, CHECK); |
596 } | |
597 } | |
598 } | |
599 | |
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600 // Resolve all the classes in the constant pool. If they are all resolved, |
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601 // the constant pool is read-only. Enhancement: allocate cp entries to |
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602 // another metaspace, and copy to read-only or read-write space if this |
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603 // bit is set. |
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604 bool ConstantPool::resolve_class_constants(TRAPS) { |
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605 constantPoolHandle cp(THREAD, this); |
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606 for (int index = 1; index < length(); index++) { // Index 0 is unused |
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607 if (tag_at(index).is_unresolved_klass() && |
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608 klass_at_if_loaded(cp, index) == NULL) { |
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609 return false; |
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610 } |
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611 } |
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612 // set_preresolution(); or some bit for future use |
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613 return true; |
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614 } |
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615 |
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616 // If resolution for MethodHandle or MethodType fails, save the exception |
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617 // in the resolution error table, so that the same exception is thrown again. |
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618 void ConstantPool::save_and_throw_exception(constantPoolHandle this_oop, int which, |
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619 int tag, TRAPS) { |
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620 ResourceMark rm; |
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621 Symbol* error = PENDING_EXCEPTION->klass()->name(); |
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622 MonitorLockerEx ml(this_oop->lock()); // lock cpool to change tag. |
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623 |
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624 int error_tag = (tag == JVM_CONSTANT_MethodHandle) ? |
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625 JVM_CONSTANT_MethodHandleInError : JVM_CONSTANT_MethodTypeInError; |
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626 |
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627 if (!PENDING_EXCEPTION-> |
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628 is_a(SystemDictionary::LinkageError_klass())) { |
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629 // Just throw the exception and don't prevent these classes from |
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630 // being loaded due to virtual machine errors like StackOverflow |
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631 // and OutOfMemoryError, etc, or if the thread was hit by stop() |
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632 // Needs clarification to section 5.4.3 of the VM spec (see 6308271) |
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633 |
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634 } else if (this_oop->tag_at(which).value() != error_tag) { |
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635 SystemDictionary::add_resolution_error(this_oop, which, error); |
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636 this_oop->tag_at_put(which, error_tag); |
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637 } else { |
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638 // some other thread has put the class in error state. |
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639 error = SystemDictionary::find_resolution_error(this_oop, which); |
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640 assert(error != NULL, "checking"); |
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641 CLEAR_PENDING_EXCEPTION; |
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642 THROW_MSG(error, ""); |
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643 } |
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644 } |
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645 |
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646 |
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647 // Called to resolve constants in the constant pool and return an oop. |
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648 // Some constant pool entries cache their resolved oop. This is also |
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649 // called to create oops from constants to use in arguments for invokedynamic |
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650 oop ConstantPool::resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS) { |
1602 | 651 oop result_oop = NULL; |
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652 Handle throw_exception; |
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653 |
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654 if (cache_index == _possible_index_sentinel) { |
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655 // It is possible that this constant is one which is cached in the objects. |
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656 // We'll do a linear search. This should be OK because this usage is rare. |
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657 assert(index > 0, "valid index"); |
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658 cache_index = this_oop->cp_to_object_index(index); |
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659 } |
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660 assert(cache_index == _no_index_sentinel || cache_index >= 0, ""); |
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661 assert(index == _no_index_sentinel || index >= 0, ""); |
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662 |
1602 | 663 if (cache_index >= 0) { |
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664 result_oop = this_oop->resolved_references()->obj_at(cache_index); |
1602 | 665 if (result_oop != NULL) { |
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666 return result_oop; |
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667 // That was easy... |
1602 | 668 } |
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669 index = this_oop->object_to_cp_index(cache_index); |
1602 | 670 } |
671 | |
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672 jvalue prim_value; // temp used only in a few cases below |
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673 |
1602 | 674 int tag_value = this_oop->tag_at(index).value(); |
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675 |
1602 | 676 switch (tag_value) { |
677 | |
678 case JVM_CONSTANT_UnresolvedClass: | |
679 case JVM_CONSTANT_UnresolvedClassInError: | |
680 case JVM_CONSTANT_Class: | |
681 { | |
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682 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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683 Klass* resolved = klass_at_impl(this_oop, index, CHECK_NULL); |
1602 | 684 // ldc wants the java mirror. |
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685 result_oop = resolved->java_mirror(); |
1602 | 686 break; |
687 } | |
688 | |
689 case JVM_CONSTANT_String: | |
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690 assert(cache_index != _no_index_sentinel, "should have been set"); |
1602 | 691 if (this_oop->is_pseudo_string_at(index)) { |
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692 result_oop = this_oop->pseudo_string_at(index, cache_index); |
1602 | 693 break; |
694 } | |
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695 result_oop = string_at_impl(this_oop, index, cache_index, CHECK_NULL); |
1602 | 696 break; |
697 | |
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698 case JVM_CONSTANT_MethodHandleInError: |
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699 case JVM_CONSTANT_MethodTypeInError: |
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700 { |
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701 Symbol* error = SystemDictionary::find_resolution_error(this_oop, index); |
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702 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table"); |
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703 ResourceMark rm; |
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704 THROW_MSG_0(error, ""); |
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705 break; |
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706 } |
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707 |
1602 | 708 case JVM_CONSTANT_MethodHandle: |
709 { | |
710 int ref_kind = this_oop->method_handle_ref_kind_at(index); | |
711 int callee_index = this_oop->method_handle_klass_index_at(index); | |
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712 Symbol* name = this_oop->method_handle_name_ref_at(index); |
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713 Symbol* signature = this_oop->method_handle_signature_ref_at(index); |
1602 | 714 if (PrintMiscellaneous) |
715 tty->print_cr("resolve JVM_CONSTANT_MethodHandle:%d [%d/%d/%d] %s.%s", | |
716 ref_kind, index, this_oop->method_handle_index_at(index), | |
717 callee_index, name->as_C_string(), signature->as_C_string()); | |
718 KlassHandle callee; | |
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719 { Klass* k = klass_at_impl(this_oop, callee_index, CHECK_NULL); |
1602 | 720 callee = KlassHandle(THREAD, k); |
721 } | |
722 KlassHandle klass(THREAD, this_oop->pool_holder()); | |
723 Handle value = SystemDictionary::link_method_handle_constant(klass, ref_kind, | |
724 callee, name, signature, | |
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725 THREAD); |
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726 result_oop = value(); |
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727 if (HAS_PENDING_EXCEPTION) { |
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728 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL); |
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729 } |
1602 | 730 break; |
731 } | |
732 | |
733 case JVM_CONSTANT_MethodType: | |
734 { | |
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735 Symbol* signature = this_oop->method_type_signature_at(index); |
1602 | 736 if (PrintMiscellaneous) |
737 tty->print_cr("resolve JVM_CONSTANT_MethodType [%d/%d] %s", | |
738 index, this_oop->method_type_index_at(index), | |
739 signature->as_C_string()); | |
740 KlassHandle klass(THREAD, this_oop->pool_holder()); | |
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741 Handle value = SystemDictionary::find_method_handle_type(signature, klass, THREAD); |
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742 result_oop = value(); |
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743 if (HAS_PENDING_EXCEPTION) { |
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744 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL); |
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745 } |
1602 | 746 break; |
747 } | |
748 | |
749 case JVM_CONSTANT_Integer: | |
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750 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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751 prim_value.i = this_oop->int_at(index); |
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752 result_oop = java_lang_boxing_object::create(T_INT, &prim_value, CHECK_NULL); |
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753 break; |
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754 |
1602 | 755 case JVM_CONSTANT_Float: |
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756 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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757 prim_value.f = this_oop->float_at(index); |
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758 result_oop = java_lang_boxing_object::create(T_FLOAT, &prim_value, CHECK_NULL); |
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759 break; |
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760 |
1602 | 761 case JVM_CONSTANT_Long: |
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762 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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763 prim_value.j = this_oop->long_at(index); |
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764 result_oop = java_lang_boxing_object::create(T_LONG, &prim_value, CHECK_NULL); |
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765 break; |
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766 |
1602 | 767 case JVM_CONSTANT_Double: |
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768 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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769 prim_value.d = this_oop->double_at(index); |
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770 result_oop = java_lang_boxing_object::create(T_DOUBLE, &prim_value, CHECK_NULL); |
1602 | 771 break; |
772 | |
773 default: | |
774 DEBUG_ONLY( tty->print_cr("*** %p: tag at CP[%d/%d] = %d", | |
775 this_oop(), index, cache_index, tag_value) ); | |
776 assert(false, "unexpected constant tag"); | |
777 break; | |
778 } | |
779 | |
780 if (cache_index >= 0) { | |
781 // Cache the oop here also. | |
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782 Handle result_handle(THREAD, result_oop); |
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783 MonitorLockerEx ml(this_oop->lock()); // don't know if we really need this |
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784 oop result = this_oop->resolved_references()->obj_at(cache_index); |
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785 // Benign race condition: resolved_references may already be filled in while we were trying to lock. |
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786 // The important thing here is that all threads pick up the same result. |
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787 // It doesn't matter which racing thread wins, as long as only one |
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788 // result is used by all threads, and all future queries. |
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789 // That result may be either a resolved constant or a failure exception. |
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790 if (result == NULL) { |
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791 this_oop->resolved_references()->obj_at_put(cache_index, result_handle()); |
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792 return result_handle(); |
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793 } else { |
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794 // Return the winning thread's result. This can be different than |
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795 // result_handle() for MethodHandles. |
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796 return result; |
1602 | 797 } |
798 } else { | |
799 return result_oop; | |
800 } | |
801 } | |
802 | |
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803 oop ConstantPool::uncached_string_at(int which, TRAPS) { |
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804 Symbol* sym = unresolved_string_at(which); |
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805 oop str = StringTable::intern(sym, CHECK_(NULL)); |
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806 assert(java_lang_String::is_instance(str), "must be string"); |
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807 return str; |
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808 } |
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809 |
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810 |
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811 oop ConstantPool::resolve_bootstrap_specifier_at_impl(constantPoolHandle this_oop, int index, TRAPS) { |
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812 assert(this_oop->tag_at(index).is_invoke_dynamic(), "Corrupted constant pool"); |
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813 |
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814 Handle bsm; |
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815 int argc; |
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816 { |
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817 // JVM_CONSTANT_InvokeDynamic is an ordered pair of [bootm, name&type], plus optional arguments |
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818 // The bootm, being a JVM_CONSTANT_MethodHandle, has its own cache entry. |
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819 // It is accompanied by the optional arguments. |
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820 int bsm_index = this_oop->invoke_dynamic_bootstrap_method_ref_index_at(index); |
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821 oop bsm_oop = this_oop->resolve_possibly_cached_constant_at(bsm_index, CHECK_NULL); |
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822 if (!java_lang_invoke_MethodHandle::is_instance(bsm_oop)) { |
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823 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "BSM not an MethodHandle"); |
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824 } |
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825 |
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826 // Extract the optional static arguments. |
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827 argc = this_oop->invoke_dynamic_argument_count_at(index); |
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828 if (argc == 0) return bsm_oop; |
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829 |
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830 bsm = Handle(THREAD, bsm_oop); |
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831 } |
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832 |
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833 objArrayHandle info; |
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834 { |
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835 objArrayOop info_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), 1+argc, CHECK_NULL); |
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836 info = objArrayHandle(THREAD, info_oop); |
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837 } |
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838 |
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839 info->obj_at_put(0, bsm()); |
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840 for (int i = 0; i < argc; i++) { |
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841 int arg_index = this_oop->invoke_dynamic_argument_index_at(index, i); |
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842 oop arg_oop = this_oop->resolve_possibly_cached_constant_at(arg_index, CHECK_NULL); |
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843 info->obj_at_put(1+i, arg_oop); |
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844 } |
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845 |
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846 return info(); |
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847 } |
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848 |
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849 oop ConstantPool::string_at_impl(constantPoolHandle this_oop, int which, int obj_index, TRAPS) { |
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850 // If the string has already been interned, this entry will be non-null |
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851 oop str = this_oop->resolved_references()->obj_at(obj_index); |
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852 if (str != NULL) return str; |
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853 |
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854 Symbol* sym = this_oop->unresolved_string_at(which); |
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855 str = StringTable::intern(sym, CHECK_(NULL)); |
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856 this_oop->string_at_put(which, obj_index, str); |
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857 assert(java_lang_String::is_instance(str), "must be string"); |
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858 return str; |
0 | 859 } |
860 | |
861 | |
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862 bool ConstantPool::klass_name_at_matches(instanceKlassHandle k, |
0 | 863 int which) { |
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864 // Names are interned, so we can compare Symbol*s directly |
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865 Symbol* cp_name = klass_name_at(which); |
0 | 866 return (cp_name == k->name()); |
867 } | |
868 | |
869 | |
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870 // Iterate over symbols and decrement ones which are Symbol*s. |
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871 // This is done during GC so do not need to lock constantPool unless we |
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872 // have per-thread safepoints. |
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873 // Only decrement the UTF8 symbols. Unresolved classes and strings point to |
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874 // these symbols but didn't increment the reference count. |
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875 void ConstantPool::unreference_symbols() { |
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876 for (int index = 1; index < length(); index++) { // Index 0 is unused |
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877 constantTag tag = tag_at(index); |
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878 if (tag.is_symbol()) { |
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879 symbol_at(index)->decrement_refcount(); |
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880 } |
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881 } |
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882 } |
0 | 883 |
884 | |
885 // Compare this constant pool's entry at index1 to the constant pool | |
886 // cp2's entry at index2. | |
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887 bool ConstantPool::compare_entry_to(int index1, constantPoolHandle cp2, |
0 | 888 int index2, TRAPS) { |
889 | |
890 jbyte t1 = tag_at(index1).value(); | |
891 jbyte t2 = cp2->tag_at(index2).value(); | |
892 | |
893 | |
894 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass | |
895 // when comparing | |
896 if (t1 == JVM_CONSTANT_UnresolvedClassInError) { | |
897 t1 = JVM_CONSTANT_UnresolvedClass; | |
898 } | |
899 if (t2 == JVM_CONSTANT_UnresolvedClassInError) { | |
900 t2 = JVM_CONSTANT_UnresolvedClass; | |
901 } | |
902 | |
903 if (t1 != t2) { | |
904 // Not the same entry type so there is nothing else to check. Note | |
905 // that this style of checking will consider resolved/unresolved | |
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906 // class pairs as different. |
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907 // From the ConstantPool* API point of view, this is correct |
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908 // behavior. See VM_RedefineClasses::merge_constant_pools() to see how this |
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909 // plays out in the context of ConstantPool* merging. |
0 | 910 return false; |
911 } | |
912 | |
913 switch (t1) { | |
914 case JVM_CONSTANT_Class: | |
915 { | |
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916 Klass* k1 = klass_at(index1, CHECK_false); |
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917 Klass* k2 = cp2->klass_at(index2, CHECK_false); |
0 | 918 if (k1 == k2) { |
919 return true; | |
920 } | |
921 } break; | |
922 | |
923 case JVM_CONSTANT_ClassIndex: | |
924 { | |
925 int recur1 = klass_index_at(index1); | |
926 int recur2 = cp2->klass_index_at(index2); | |
927 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
928 if (match) { | |
929 return true; | |
930 } | |
931 } break; | |
932 | |
933 case JVM_CONSTANT_Double: | |
934 { | |
935 jdouble d1 = double_at(index1); | |
936 jdouble d2 = cp2->double_at(index2); | |
937 if (d1 == d2) { | |
938 return true; | |
939 } | |
940 } break; | |
941 | |
942 case JVM_CONSTANT_Fieldref: | |
943 case JVM_CONSTANT_InterfaceMethodref: | |
944 case JVM_CONSTANT_Methodref: | |
945 { | |
946 int recur1 = uncached_klass_ref_index_at(index1); | |
947 int recur2 = cp2->uncached_klass_ref_index_at(index2); | |
948 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
949 if (match) { | |
950 recur1 = uncached_name_and_type_ref_index_at(index1); | |
951 recur2 = cp2->uncached_name_and_type_ref_index_at(index2); | |
952 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
953 if (match) { | |
954 return true; | |
955 } | |
956 } | |
957 } break; | |
958 | |
959 case JVM_CONSTANT_Float: | |
960 { | |
961 jfloat f1 = float_at(index1); | |
962 jfloat f2 = cp2->float_at(index2); | |
963 if (f1 == f2) { | |
964 return true; | |
965 } | |
966 } break; | |
967 | |
968 case JVM_CONSTANT_Integer: | |
969 { | |
970 jint i1 = int_at(index1); | |
971 jint i2 = cp2->int_at(index2); | |
972 if (i1 == i2) { | |
973 return true; | |
974 } | |
975 } break; | |
976 | |
977 case JVM_CONSTANT_Long: | |
978 { | |
979 jlong l1 = long_at(index1); | |
980 jlong l2 = cp2->long_at(index2); | |
981 if (l1 == l2) { | |
982 return true; | |
983 } | |
984 } break; | |
985 | |
986 case JVM_CONSTANT_NameAndType: | |
987 { | |
988 int recur1 = name_ref_index_at(index1); | |
989 int recur2 = cp2->name_ref_index_at(index2); | |
990 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
991 if (match) { | |
992 recur1 = signature_ref_index_at(index1); | |
993 recur2 = cp2->signature_ref_index_at(index2); | |
994 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
995 if (match) { | |
996 return true; | |
997 } | |
998 } | |
999 } break; | |
1000 | |
1001 case JVM_CONSTANT_StringIndex: | |
1002 { | |
1003 int recur1 = string_index_at(index1); | |
1004 int recur2 = cp2->string_index_at(index2); | |
1005 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
1006 if (match) { | |
1007 return true; | |
1008 } | |
1009 } break; | |
1010 | |
1011 case JVM_CONSTANT_UnresolvedClass: | |
1012 { | |
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1013 Symbol* k1 = unresolved_klass_at(index1); |
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1014 Symbol* k2 = cp2->unresolved_klass_at(index2); |
0 | 1015 if (k1 == k2) { |
1016 return true; | |
1017 } | |
1018 } break; | |
1019 | |
1602 | 1020 case JVM_CONSTANT_MethodType: |
1021 { | |
1022 int k1 = method_type_index_at(index1); | |
1023 int k2 = cp2->method_type_index_at(index2); | |
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1024 bool match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1025 if (match) { |
1602 | 1026 return true; |
1027 } | |
1028 } break; | |
1029 | |
1030 case JVM_CONSTANT_MethodHandle: | |
1031 { | |
1032 int k1 = method_handle_ref_kind_at(index1); | |
1033 int k2 = cp2->method_handle_ref_kind_at(index2); | |
1034 if (k1 == k2) { | |
1035 int i1 = method_handle_index_at(index1); | |
1036 int i2 = cp2->method_handle_index_at(index2); | |
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1037 bool match = compare_entry_to(i1, cp2, i2, CHECK_false); |
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1038 if (match) { |
1602 | 1039 return true; |
1040 } | |
1041 } | |
1042 } break; | |
1043 | |
1660
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1044 case JVM_CONSTANT_InvokeDynamic: |
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1045 { |
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1046 int k1 = invoke_dynamic_bootstrap_method_ref_index_at(index1); |
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1047 int k2 = cp2->invoke_dynamic_bootstrap_method_ref_index_at(index2); |
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1048 bool match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1049 if (!match) return false; |
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1050 k1 = invoke_dynamic_name_and_type_ref_index_at(index1); |
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1051 k2 = cp2->invoke_dynamic_name_and_type_ref_index_at(index2); |
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1052 match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1053 if (!match) return false; |
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1054 int argc = invoke_dynamic_argument_count_at(index1); |
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1055 if (argc == cp2->invoke_dynamic_argument_count_at(index2)) { |
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1056 for (int j = 0; j < argc; j++) { |
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1057 k1 = invoke_dynamic_argument_index_at(index1, j); |
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1058 k2 = cp2->invoke_dynamic_argument_index_at(index2, j); |
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1059 match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1060 if (!match) return false; |
1913
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1061 } |
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1062 return true; // got through loop; all elements equal |
1660
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1063 } |
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1064 } break; |
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1065 |
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1066 case JVM_CONSTANT_String: |
0 | 1067 { |
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1068 Symbol* s1 = unresolved_string_at(index1); |
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1069 Symbol* s2 = cp2->unresolved_string_at(index2); |
0 | 1070 if (s1 == s2) { |
1071 return true; | |
1072 } | |
1073 } break; | |
1074 | |
1075 case JVM_CONSTANT_Utf8: | |
1076 { | |
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1077 Symbol* s1 = symbol_at(index1); |
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1078 Symbol* s2 = cp2->symbol_at(index2); |
0 | 1079 if (s1 == s2) { |
1080 return true; | |
1081 } | |
1082 } break; | |
1083 | |
1084 // Invalid is used as the tag for the second constant pool entry | |
1085 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
1086 // not be seen by itself. | |
1087 case JVM_CONSTANT_Invalid: // fall through | |
1088 | |
1089 default: | |
1090 ShouldNotReachHere(); | |
1091 break; | |
1092 } | |
1093 | |
1094 return false; | |
1095 } // end compare_entry_to() | |
1096 | |
1097 | |
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1098 void ConstantPool::copy_operands(constantPoolHandle from_cp, |
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1099 constantPoolHandle to_cp, |
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1100 TRAPS) { |
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1101 |
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1102 int from_oplen = operand_array_length(from_cp->operands()); |
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1103 int old_oplen = operand_array_length(to_cp->operands()); |
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1104 if (from_oplen != 0) { |
6934 | 1105 ClassLoaderData* loader_data = to_cp->pool_holder()->class_loader_data(); |
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1106 // append my operands to the target's operands array |
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1107 if (old_oplen == 0) { |
6934 | 1108 // Can't just reuse from_cp's operand list because of deallocation issues |
1109 int len = from_cp->operands()->length(); | |
1110 Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, len, CHECK); | |
1111 Copy::conjoint_memory_atomic( | |
1112 from_cp->operands()->adr_at(0), new_ops->adr_at(0), len * sizeof(u2)); | |
1113 to_cp->set_operands(new_ops); | |
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1114 } else { |
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1115 int old_len = to_cp->operands()->length(); |
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1116 int from_len = from_cp->operands()->length(); |
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1117 int old_off = old_oplen * sizeof(u2); |
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1118 int from_off = from_oplen * sizeof(u2); |
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1119 // Use the metaspace for the destination constant pool |
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1120 Array<u2>* new_operands = MetadataFactory::new_array<u2>(loader_data, old_len + from_len, CHECK); |
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1121 int fillp = 0, len = 0; |
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1122 // first part of dest |
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1123 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0), |
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1124 new_operands->adr_at(fillp), |
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1125 (len = old_off) * sizeof(u2)); |
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1126 fillp += len; |
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1127 // first part of src |
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1128 Copy::conjoint_memory_atomic(from_cp->operands()->adr_at(0), |
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1129 new_operands->adr_at(fillp), |
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1130 (len = from_off) * sizeof(u2)); |
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1131 fillp += len; |
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1132 // second part of dest |
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1133 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(old_off), |
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1134 new_operands->adr_at(fillp), |
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1135 (len = old_len - old_off) * sizeof(u2)); |
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1136 fillp += len; |
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1137 // second part of src |
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1138 Copy::conjoint_memory_atomic(from_cp->operands()->adr_at(from_off), |
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1139 new_operands->adr_at(fillp), |
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1140 (len = from_len - from_off) * sizeof(u2)); |
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1141 fillp += len; |
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1142 assert(fillp == new_operands->length(), ""); |
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1143 |
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1144 // Adjust indexes in the first part of the copied operands array. |
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1145 for (int j = 0; j < from_oplen; j++) { |
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1146 int offset = operand_offset_at(new_operands, old_oplen + j); |
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1147 assert(offset == operand_offset_at(from_cp->operands(), j), "correct copy"); |
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1148 offset += old_len; // every new tuple is preceded by old_len extra u2's |
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1149 operand_offset_at_put(new_operands, old_oplen + j, offset); |
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1150 } |
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1151 |
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1152 // replace target operands array with combined array |
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1153 to_cp->set_operands(new_operands); |
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1154 } |
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1155 } |
7952
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1156 } // end copy_operands() |
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1157 |
7952
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1158 |
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1159 // Copy this constant pool's entries at start_i to end_i (inclusive) |
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1160 // to the constant pool to_cp's entries starting at to_i. A total of |
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1161 // (end_i - start_i) + 1 entries are copied. |
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1162 void ConstantPool::copy_cp_to_impl(constantPoolHandle from_cp, int start_i, int end_i, |
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1163 constantPoolHandle to_cp, int to_i, TRAPS) { |
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1164 |
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1165 |
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1166 int dest_i = to_i; // leave original alone for debug purposes |
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1167 |
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1168 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { |
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1169 copy_entry_to(from_cp, src_i, to_cp, dest_i, CHECK); |
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|
1170 |
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1171 switch (from_cp->tag_at(src_i).value()) { |
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1172 case JVM_CONSTANT_Double: |
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1173 case JVM_CONSTANT_Long: |
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1174 // double and long take two constant pool entries |
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1175 src_i += 2; |
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1176 dest_i += 2; |
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1177 break; |
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1178 |
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1179 default: |
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1180 // all others take one constant pool entry |
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1181 src_i++; |
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1182 dest_i++; |
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1183 break; |
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1184 } |
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1185 } |
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1186 copy_operands(from_cp, to_cp, CHECK); |
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1187 |
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1188 } // end copy_cp_to_impl() |
0 | 1189 |
1190 | |
1191 // Copy this constant pool's entry at from_i to the constant pool | |
1192 // to_cp's entry at to_i. | |
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1193 void ConstantPool::copy_entry_to(constantPoolHandle from_cp, int from_i, |
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1194 constantPoolHandle to_cp, int to_i, |
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1195 TRAPS) { |
0 | 1196 |
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1197 int tag = from_cp->tag_at(from_i).value(); |
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1198 switch (tag) { |
0 | 1199 case JVM_CONSTANT_Class: |
1200 { | |
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1201 Klass* k = from_cp->klass_at(from_i, CHECK); |
0 | 1202 to_cp->klass_at_put(to_i, k); |
1203 } break; | |
1204 | |
1205 case JVM_CONSTANT_ClassIndex: | |
1206 { | |
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1207 jint ki = from_cp->klass_index_at(from_i); |
0 | 1208 to_cp->klass_index_at_put(to_i, ki); |
1209 } break; | |
1210 | |
1211 case JVM_CONSTANT_Double: | |
1212 { | |
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1213 jdouble d = from_cp->double_at(from_i); |
0 | 1214 to_cp->double_at_put(to_i, d); |
1215 // double takes two constant pool entries so init second entry's tag | |
1216 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
1217 } break; | |
1218 | |
1219 case JVM_CONSTANT_Fieldref: | |
1220 { | |
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1221 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
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1222 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
0 | 1223 to_cp->field_at_put(to_i, class_index, name_and_type_index); |
1224 } break; | |
1225 | |
1226 case JVM_CONSTANT_Float: | |
1227 { | |
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1228 jfloat f = from_cp->float_at(from_i); |
0 | 1229 to_cp->float_at_put(to_i, f); |
1230 } break; | |
1231 | |
1232 case JVM_CONSTANT_Integer: | |
1233 { | |
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1234 jint i = from_cp->int_at(from_i); |
0 | 1235 to_cp->int_at_put(to_i, i); |
1236 } break; | |
1237 | |
1238 case JVM_CONSTANT_InterfaceMethodref: | |
1239 { | |
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1240 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
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1241 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
0 | 1242 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); |
1243 } break; | |
1244 | |
1245 case JVM_CONSTANT_Long: | |
1246 { | |
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|
1247 jlong l = from_cp->long_at(from_i); |
0 | 1248 to_cp->long_at_put(to_i, l); |
1249 // long takes two constant pool entries so init second entry's tag | |
1250 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
1251 } break; | |
1252 | |
1253 case JVM_CONSTANT_Methodref: | |
1254 { | |
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1255 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
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1256 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
0 | 1257 to_cp->method_at_put(to_i, class_index, name_and_type_index); |
1258 } break; | |
1259 | |
1260 case JVM_CONSTANT_NameAndType: | |
1261 { | |
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|
1262 int name_ref_index = from_cp->name_ref_index_at(from_i); |
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|
1263 int signature_ref_index = from_cp->signature_ref_index_at(from_i); |
0 | 1264 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); |
1265 } break; | |
1266 | |
1267 case JVM_CONSTANT_StringIndex: | |
1268 { | |
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|
1269 jint si = from_cp->string_index_at(from_i); |
0 | 1270 to_cp->string_index_at_put(to_i, si); |
1271 } break; | |
1272 | |
1273 case JVM_CONSTANT_UnresolvedClass: | |
1274 { | |
2332
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|
1275 // Can be resolved after checking tag, so check the slot first. |
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|
1276 CPSlot entry = from_cp->slot_at(from_i); |
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1277 if (entry.is_resolved()) { |
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1278 assert(entry.get_klass()->is_klass(), "must be"); |
2332
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|
1279 // Already resolved |
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1280 to_cp->klass_at_put(to_i, entry.get_klass()); |
2332
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1281 } else { |
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|
1282 to_cp->unresolved_klass_at_put(to_i, entry.get_symbol()); |
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|
1283 } |
0 | 1284 } break; |
1285 | |
1286 case JVM_CONSTANT_UnresolvedClassInError: | |
1287 { | |
2177
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|
1288 Symbol* k = from_cp->unresolved_klass_at(from_i); |
0 | 1289 to_cp->unresolved_klass_at_put(to_i, k); |
1290 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); | |
1291 } break; | |
1292 | |
1293 | |
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1294 case JVM_CONSTANT_String: |
0 | 1295 { |
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1296 Symbol* s = from_cp->unresolved_string_at(from_i); |
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1297 to_cp->unresolved_string_at_put(to_i, s); |
0 | 1298 } break; |
1299 | |
1300 case JVM_CONSTANT_Utf8: | |
1301 { | |
2177
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1302 Symbol* s = from_cp->symbol_at(from_i); |
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1303 // Need to increase refcount, the old one will be thrown away and deferenced |
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|
1304 s->increment_refcount(); |
0 | 1305 to_cp->symbol_at_put(to_i, s); |
1306 } break; | |
1307 | |
1602 | 1308 case JVM_CONSTANT_MethodType: |
1309 { | |
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|
1310 jint k = from_cp->method_type_index_at(from_i); |
1602 | 1311 to_cp->method_type_index_at_put(to_i, k); |
1312 } break; | |
1313 | |
1314 case JVM_CONSTANT_MethodHandle: | |
1315 { | |
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1316 int k1 = from_cp->method_handle_ref_kind_at(from_i); |
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|
1317 int k2 = from_cp->method_handle_index_at(from_i); |
1602 | 1318 to_cp->method_handle_index_at_put(to_i, k1, k2); |
1319 } break; | |
1320 | |
1660
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1602
diff
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|
1321 case JVM_CONSTANT_InvokeDynamic: |
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diff
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|
1322 { |
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|
1323 int k1 = from_cp->invoke_dynamic_bootstrap_specifier_index(from_i); |
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|
1324 int k2 = from_cp->invoke_dynamic_name_and_type_ref_index_at(from_i); |
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1325 k1 += operand_array_length(to_cp->operands()); // to_cp might already have operands |
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|
1326 to_cp->invoke_dynamic_at_put(to_i, k1, k2); |
1660
083fde3b838e
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1602
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|
1327 } break; |
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|
1328 |
0 | 1329 // Invalid is used as the tag for the second constant pool entry |
1330 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
1331 // not be seen by itself. | |
1332 case JVM_CONSTANT_Invalid: // fall through | |
1333 | |
1334 default: | |
1335 { | |
1336 ShouldNotReachHere(); | |
1337 } break; | |
1338 } | |
1339 } // end copy_entry_to() | |
1340 | |
1341 | |
1342 // Search constant pool search_cp for an entry that matches this | |
1343 // constant pool's entry at pattern_i. Returns the index of a | |
1344 // matching entry or zero (0) if there is no matching entry. | |
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1345 int ConstantPool::find_matching_entry(int pattern_i, |
0 | 1346 constantPoolHandle search_cp, TRAPS) { |
1347 | |
1348 // index zero (0) is not used | |
1349 for (int i = 1; i < search_cp->length(); i++) { | |
1350 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); | |
1351 if (found) { | |
1352 return i; | |
1353 } | |
1354 } | |
1355 | |
1356 return 0; // entry not found; return unused index zero (0) | |
1357 } // end find_matching_entry() | |
1358 | |
1359 | |
1360 #ifndef PRODUCT | |
1361 | |
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1362 const char* ConstantPool::printable_name_at(int which) { |
0 | 1363 |
1364 constantTag tag = tag_at(which); | |
1365 | |
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1366 if (tag.is_string()) { |
0 | 1367 return string_at_noresolve(which); |
1368 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1369 return klass_name_at(which)->as_C_string(); | |
1370 } else if (tag.is_symbol()) { | |
1371 return symbol_at(which)->as_C_string(); | |
1372 } | |
1373 return ""; | |
1374 } | |
1375 | |
1376 #endif // PRODUCT | |
1377 | |
1378 | |
1379 // JVMTI GetConstantPool support | |
1380 | |
1381 // For temporary use until code is stable. | |
1382 #define DBG(code) | |
1383 | |
1384 static const char* WARN_MSG = "Must not be such entry!"; | |
1385 | |
1386 static void print_cpool_bytes(jint cnt, u1 *bytes) { | |
1387 jint size = 0; | |
1388 u2 idx1, idx2; | |
1389 | |
1390 for (jint idx = 1; idx < cnt; idx++) { | |
1391 jint ent_size = 0; | |
1392 u1 tag = *bytes++; | |
1393 size++; // count tag | |
1394 | |
1395 printf("const #%03d, tag: %02d ", idx, tag); | |
1396 switch(tag) { | |
1397 case JVM_CONSTANT_Invalid: { | |
1398 printf("Invalid"); | |
1399 break; | |
1400 } | |
1401 case JVM_CONSTANT_Unicode: { | |
1402 printf("Unicode %s", WARN_MSG); | |
1403 break; | |
1404 } | |
1405 case JVM_CONSTANT_Utf8: { | |
1406 u2 len = Bytes::get_Java_u2(bytes); | |
1407 char str[128]; | |
1408 if (len > 127) { | |
1409 len = 127; | |
1410 } | |
1411 strncpy(str, (char *) (bytes+2), len); | |
1412 str[len] = '\0'; | |
1413 printf("Utf8 \"%s\"", str); | |
1414 ent_size = 2 + len; | |
1415 break; | |
1416 } | |
1417 case JVM_CONSTANT_Integer: { | |
1418 u4 val = Bytes::get_Java_u4(bytes); | |
1419 printf("int %d", *(int *) &val); | |
1420 ent_size = 4; | |
1421 break; | |
1422 } | |
1423 case JVM_CONSTANT_Float: { | |
1424 u4 val = Bytes::get_Java_u4(bytes); | |
1425 printf("float %5.3ff", *(float *) &val); | |
1426 ent_size = 4; | |
1427 break; | |
1428 } | |
1429 case JVM_CONSTANT_Long: { | |
1430 u8 val = Bytes::get_Java_u8(bytes); | |
3960 | 1431 printf("long "INT64_FORMAT, (int64_t) *(jlong *) &val); |
0 | 1432 ent_size = 8; |
1433 idx++; // Long takes two cpool slots | |
1434 break; | |
1435 } | |
1436 case JVM_CONSTANT_Double: { | |
1437 u8 val = Bytes::get_Java_u8(bytes); | |
1438 printf("double %5.3fd", *(jdouble *)&val); | |
1439 ent_size = 8; | |
1440 idx++; // Double takes two cpool slots | |
1441 break; | |
1442 } | |
1443 case JVM_CONSTANT_Class: { | |
1444 idx1 = Bytes::get_Java_u2(bytes); | |
1445 printf("class #%03d", idx1); | |
1446 ent_size = 2; | |
1447 break; | |
1448 } | |
1449 case JVM_CONSTANT_String: { | |
1450 idx1 = Bytes::get_Java_u2(bytes); | |
1451 printf("String #%03d", idx1); | |
1452 ent_size = 2; | |
1453 break; | |
1454 } | |
1455 case JVM_CONSTANT_Fieldref: { | |
1456 idx1 = Bytes::get_Java_u2(bytes); | |
1457 idx2 = Bytes::get_Java_u2(bytes+2); | |
1458 printf("Field #%03d, #%03d", (int) idx1, (int) idx2); | |
1459 ent_size = 4; | |
1460 break; | |
1461 } | |
1462 case JVM_CONSTANT_Methodref: { | |
1463 idx1 = Bytes::get_Java_u2(bytes); | |
1464 idx2 = Bytes::get_Java_u2(bytes+2); | |
1465 printf("Method #%03d, #%03d", idx1, idx2); | |
1466 ent_size = 4; | |
1467 break; | |
1468 } | |
1469 case JVM_CONSTANT_InterfaceMethodref: { | |
1470 idx1 = Bytes::get_Java_u2(bytes); | |
1471 idx2 = Bytes::get_Java_u2(bytes+2); | |
1472 printf("InterfMethod #%03d, #%03d", idx1, idx2); | |
1473 ent_size = 4; | |
1474 break; | |
1475 } | |
1476 case JVM_CONSTANT_NameAndType: { | |
1477 idx1 = Bytes::get_Java_u2(bytes); | |
1478 idx2 = Bytes::get_Java_u2(bytes+2); | |
1479 printf("NameAndType #%03d, #%03d", idx1, idx2); | |
1480 ent_size = 4; | |
1481 break; | |
1482 } | |
1483 case JVM_CONSTANT_ClassIndex: { | |
1484 printf("ClassIndex %s", WARN_MSG); | |
1485 break; | |
1486 } | |
1487 case JVM_CONSTANT_UnresolvedClass: { | |
1488 printf("UnresolvedClass: %s", WARN_MSG); | |
1489 break; | |
1490 } | |
1491 case JVM_CONSTANT_UnresolvedClassInError: { | |
1492 printf("UnresolvedClassInErr: %s", WARN_MSG); | |
1493 break; | |
1494 } | |
1495 case JVM_CONSTANT_StringIndex: { | |
1496 printf("StringIndex: %s", WARN_MSG); | |
1497 break; | |
1498 } | |
1499 } | |
1500 printf(";\n"); | |
1501 bytes += ent_size; | |
1502 size += ent_size; | |
1503 } | |
1504 printf("Cpool size: %d\n", size); | |
1505 fflush(0); | |
1506 return; | |
1507 } /* end print_cpool_bytes */ | |
1508 | |
1509 | |
1510 // Returns size of constant pool entry. | |
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1511 jint ConstantPool::cpool_entry_size(jint idx) { |
0 | 1512 switch(tag_at(idx).value()) { |
1513 case JVM_CONSTANT_Invalid: | |
1514 case JVM_CONSTANT_Unicode: | |
1515 return 1; | |
1516 | |
1517 case JVM_CONSTANT_Utf8: | |
1518 return 3 + symbol_at(idx)->utf8_length(); | |
1519 | |
1520 case JVM_CONSTANT_Class: | |
1521 case JVM_CONSTANT_String: | |
1522 case JVM_CONSTANT_ClassIndex: | |
1523 case JVM_CONSTANT_UnresolvedClass: | |
1524 case JVM_CONSTANT_UnresolvedClassInError: | |
1525 case JVM_CONSTANT_StringIndex: | |
1602 | 1526 case JVM_CONSTANT_MethodType: |
0 | 1527 return 3; |
1528 | |
1602 | 1529 case JVM_CONSTANT_MethodHandle: |
1530 return 4; //tag, ref_kind, ref_index | |
1531 | |
0 | 1532 case JVM_CONSTANT_Integer: |
1533 case JVM_CONSTANT_Float: | |
1534 case JVM_CONSTANT_Fieldref: | |
1535 case JVM_CONSTANT_Methodref: | |
1536 case JVM_CONSTANT_InterfaceMethodref: | |
1537 case JVM_CONSTANT_NameAndType: | |
1913
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1538 return 5; |
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1539 |
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1540 case JVM_CONSTANT_InvokeDynamic: |
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1541 // u1 tag, u2 bsm, u2 nt |
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1542 return 5; |
0 | 1543 |
1544 case JVM_CONSTANT_Long: | |
1545 case JVM_CONSTANT_Double: | |
1546 return 9; | |
1547 } | |
1548 assert(false, "cpool_entry_size: Invalid constant pool entry tag"); | |
1549 return 1; | |
1550 } /* end cpool_entry_size */ | |
1551 | |
1552 | |
1553 // SymbolHashMap is used to find a constant pool index from a string. | |
1554 // This function fills in SymbolHashMaps, one for utf8s and one for | |
1555 // class names, returns size of the cpool raw bytes. | |
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1556 jint ConstantPool::hash_entries_to(SymbolHashMap *symmap, |
0 | 1557 SymbolHashMap *classmap) { |
1558 jint size = 0; | |
1559 | |
1560 for (u2 idx = 1; idx < length(); idx++) { | |
1561 u2 tag = tag_at(idx).value(); | |
1562 size += cpool_entry_size(idx); | |
1563 | |
1564 switch(tag) { | |
1565 case JVM_CONSTANT_Utf8: { | |
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1566 Symbol* sym = symbol_at(idx); |
0 | 1567 symmap->add_entry(sym, idx); |
1568 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); | |
1569 break; | |
1570 } | |
1571 case JVM_CONSTANT_Class: | |
1572 case JVM_CONSTANT_UnresolvedClass: | |
1573 case JVM_CONSTANT_UnresolvedClassInError: { | |
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1574 Symbol* sym = klass_name_at(idx); |
0 | 1575 classmap->add_entry(sym, idx); |
1576 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); | |
1577 break; | |
1578 } | |
1579 case JVM_CONSTANT_Long: | |
1580 case JVM_CONSTANT_Double: { | |
1581 idx++; // Both Long and Double take two cpool slots | |
1582 break; | |
1583 } | |
1584 } | |
1585 } | |
1586 return size; | |
1587 } /* end hash_utf8_entries_to */ | |
1588 | |
1589 | |
1590 // Copy cpool bytes. | |
1591 // Returns: | |
1592 // 0, in case of OutOfMemoryError | |
1593 // -1, in case of internal error | |
1594 // > 0, count of the raw cpool bytes that have been copied | |
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1595 int ConstantPool::copy_cpool_bytes(int cpool_size, |
0 | 1596 SymbolHashMap* tbl, |
1597 unsigned char *bytes) { | |
1598 u2 idx1, idx2; | |
1599 jint size = 0; | |
1600 jint cnt = length(); | |
1601 unsigned char *start_bytes = bytes; | |
1602 | |
1603 for (jint idx = 1; idx < cnt; idx++) { | |
1604 u1 tag = tag_at(idx).value(); | |
1605 jint ent_size = cpool_entry_size(idx); | |
1606 | |
1607 assert(size + ent_size <= cpool_size, "Size mismatch"); | |
1608 | |
1609 *bytes = tag; | |
1610 DBG(printf("#%03hd tag=%03hd, ", idx, tag)); | |
1611 switch(tag) { | |
1612 case JVM_CONSTANT_Invalid: { | |
1613 DBG(printf("JVM_CONSTANT_Invalid")); | |
1614 break; | |
1615 } | |
1616 case JVM_CONSTANT_Unicode: { | |
1617 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); | |
1618 DBG(printf("JVM_CONSTANT_Unicode")); | |
1619 break; | |
1620 } | |
1621 case JVM_CONSTANT_Utf8: { | |
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1622 Symbol* sym = symbol_at(idx); |
0 | 1623 char* str = sym->as_utf8(); |
1624 // Warning! It's crashing on x86 with len = sym->utf8_length() | |
1625 int len = (int) strlen(str); | |
1626 Bytes::put_Java_u2((address) (bytes+1), (u2) len); | |
1627 for (int i = 0; i < len; i++) { | |
1628 bytes[3+i] = (u1) str[i]; | |
1629 } | |
1630 DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); | |
1631 break; | |
1632 } | |
1633 case JVM_CONSTANT_Integer: { | |
1634 jint val = int_at(idx); | |
1635 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1636 break; | |
1637 } | |
1638 case JVM_CONSTANT_Float: { | |
1639 jfloat val = float_at(idx); | |
1640 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1641 break; | |
1642 } | |
1643 case JVM_CONSTANT_Long: { | |
1644 jlong val = long_at(idx); | |
1645 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1646 idx++; // Long takes two cpool slots | |
1647 break; | |
1648 } | |
1649 case JVM_CONSTANT_Double: { | |
1650 jdouble val = double_at(idx); | |
1651 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1652 idx++; // Double takes two cpool slots | |
1653 break; | |
1654 } | |
1655 case JVM_CONSTANT_Class: | |
1656 case JVM_CONSTANT_UnresolvedClass: | |
1657 case JVM_CONSTANT_UnresolvedClassInError: { | |
1658 *bytes = JVM_CONSTANT_Class; | |
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1659 Symbol* sym = klass_name_at(idx); |
0 | 1660 idx1 = tbl->symbol_to_value(sym); |
1661 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1662 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1663 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); | |
1664 break; | |
1665 } | |
1666 case JVM_CONSTANT_String: { | |
1667 *bytes = JVM_CONSTANT_String; | |
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1668 Symbol* sym = unresolved_string_at(idx); |
0 | 1669 idx1 = tbl->symbol_to_value(sym); |
1670 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1671 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1672 DBG(char *str = sym->as_utf8()); | |
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1673 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); |
0 | 1674 break; |
1675 } | |
1676 case JVM_CONSTANT_Fieldref: | |
1677 case JVM_CONSTANT_Methodref: | |
1678 case JVM_CONSTANT_InterfaceMethodref: { | |
1679 idx1 = uncached_klass_ref_index_at(idx); | |
1680 idx2 = uncached_name_and_type_ref_index_at(idx); | |
1681 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1682 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1683 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); | |
1684 break; | |
1685 } | |
1686 case JVM_CONSTANT_NameAndType: { | |
1687 idx1 = name_ref_index_at(idx); | |
1688 idx2 = signature_ref_index_at(idx); | |
1689 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1690 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1691 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); | |
1692 break; | |
1693 } | |
1694 case JVM_CONSTANT_ClassIndex: { | |
1695 *bytes = JVM_CONSTANT_Class; | |
1696 idx1 = klass_index_at(idx); | |
1697 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1698 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); | |
1699 break; | |
1700 } | |
1701 case JVM_CONSTANT_StringIndex: { | |
1702 *bytes = JVM_CONSTANT_String; | |
1703 idx1 = string_index_at(idx); | |
1704 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1705 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); | |
1706 break; | |
1707 } | |
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1708 case JVM_CONSTANT_MethodHandle: |
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1709 case JVM_CONSTANT_MethodHandleInError: { |
1602 | 1710 *bytes = JVM_CONSTANT_MethodHandle; |
1711 int kind = method_handle_ref_kind_at(idx); | |
1712 idx1 = method_handle_index_at(idx); | |
1713 *(bytes+1) = (unsigned char) kind; | |
1714 Bytes::put_Java_u2((address) (bytes+2), idx1); | |
1715 DBG(printf("JVM_CONSTANT_MethodHandle: %d %hd", kind, idx1)); | |
1716 break; | |
1717 } | |
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1718 case JVM_CONSTANT_MethodType: |
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1719 case JVM_CONSTANT_MethodTypeInError: { |
1602 | 1720 *bytes = JVM_CONSTANT_MethodType; |
1721 idx1 = method_type_index_at(idx); | |
1722 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1723 DBG(printf("JVM_CONSTANT_MethodType: %hd", idx1)); | |
1724 break; | |
1725 } | |
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1726 case JVM_CONSTANT_InvokeDynamic: { |
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1727 *bytes = tag; |
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1728 idx1 = extract_low_short_from_int(*int_at_addr(idx)); |
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1729 idx2 = extract_high_short_from_int(*int_at_addr(idx)); |
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1730 assert(idx2 == invoke_dynamic_name_and_type_ref_index_at(idx), "correct half of u4"); |
1660
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1731 Bytes::put_Java_u2((address) (bytes+1), idx1); |
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1732 Bytes::put_Java_u2((address) (bytes+3), idx2); |
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1733 DBG(printf("JVM_CONSTANT_InvokeDynamic: %hd %hd", idx1, idx2)); |
1660
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1734 break; |
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1735 } |
0 | 1736 } |
1737 DBG(printf("\n")); | |
1738 bytes += ent_size; | |
1739 size += ent_size; | |
1740 } | |
1741 assert(size == cpool_size, "Size mismatch"); | |
1742 | |
1743 // Keep temorarily for debugging until it's stable. | |
1744 DBG(print_cpool_bytes(cnt, start_bytes)); | |
1745 return (int)(bytes - start_bytes); | |
1746 } /* end copy_cpool_bytes */ | |
1747 | |
1748 | |
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1749 void ConstantPool::set_on_stack(const bool value) { |
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1750 if (value) { |
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1751 _flags |= _on_stack; |
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1752 } else { |
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1753 _flags &= ~_on_stack; |
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1754 } |
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1755 if (value) MetadataOnStackMark::record(this); |
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1756 } |
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1757 |
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1758 // JSR 292 support for patching constant pool oops after the class is linked and |
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1759 // the oop array for resolved references are created. |
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1760 // We can't do this during classfile parsing, which is how the other indexes are |
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1761 // patched. The other patches are applied early for some error checking |
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1762 // so only defer the pseudo_strings. |
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1763 void ConstantPool::patch_resolved_references( |
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1764 GrowableArray<Handle>* cp_patches) { |
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1765 assert(EnableInvokeDynamic, ""); |
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1766 for (int index = 1; index < cp_patches->length(); index++) { // Index 0 is unused |
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1767 Handle patch = cp_patches->at(index); |
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1768 if (patch.not_null()) { |
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1769 assert (tag_at(index).is_string(), "should only be string left"); |
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1770 // Patching a string means pre-resolving it. |
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1771 // The spelling in the constant pool is ignored. |
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1772 // The constant reference may be any object whatever. |
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1773 // If it is not a real interned string, the constant is referred |
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1774 // to as a "pseudo-string", and must be presented to the CP |
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1775 // explicitly, because it may require scavenging. |
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1776 int obj_index = cp_to_object_index(index); |
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1777 pseudo_string_at_put(index, obj_index, patch()); |
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1778 DEBUG_ONLY(cp_patches->at_put(index, Handle());) |
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1779 } |
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1780 } |
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1781 #ifdef ASSERT |
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1782 // Ensure that all the patches have been used. |
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1783 for (int index = 0; index < cp_patches->length(); index++) { |
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1784 assert(cp_patches->at(index).is_null(), |
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1785 err_msg("Unused constant pool patch at %d in class file %s", |
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1786 index, |
6940
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8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
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1787 pool_holder()->external_name())); |
6725
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1788 } |
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1789 #endif // ASSERT |
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1790 } |
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1791 |
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1792 #ifndef PRODUCT |
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1793 |
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1794 // CompileTheWorld support. Preload all classes loaded references in the passed in constantpool |
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1795 void ConstantPool::preload_and_initialize_all_classes(ConstantPool* obj, TRAPS) { |
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1796 guarantee(obj->is_constantPool(), "object must be constant pool"); |
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1797 constantPoolHandle cp(THREAD, (ConstantPool*)obj); |
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1798 guarantee(cp->pool_holder() != NULL, "must be fully loaded"); |
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1799 |
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1800 for (int i = 0; i< cp->length(); i++) { |
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1801 if (cp->tag_at(i).is_unresolved_klass()) { |
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1802 // This will force loading of the class |
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1803 Klass* klass = cp->klass_at(i, CHECK); |
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1804 if (klass->oop_is_instance()) { |
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1805 // Force initialization of class |
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1806 InstanceKlass::cast(klass)->initialize(CHECK); |
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1807 } |
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1808 } |
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1809 } |
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1810 } |
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1811 |
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1812 #endif |
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1813 |
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1814 |
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1815 // Printing |
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1816 |
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1817 void ConstantPool::print_on(outputStream* st) const { |
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1818 EXCEPTION_MARK; |
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1819 assert(is_constantPool(), "must be constantPool"); |
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1820 st->print_cr(internal_name()); |
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1821 if (flags() != 0) { |
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1822 st->print(" - flags: 0x%x", flags()); |
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1823 if (has_preresolution()) st->print(" has_preresolution"); |
7949
5daaddd917a1
8006040: NPG: on_stack processing wastes space in ConstantPool
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1824 if (on_stack()) st->print(" on_stack"); |
6725
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1825 st->cr(); |
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1826 } |
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1827 if (pool_holder() != NULL) { |
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1828 st->print_cr(" - holder: " INTPTR_FORMAT, pool_holder()); |
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1829 } |
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1830 st->print_cr(" - cache: " INTPTR_FORMAT, cache()); |
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1831 st->print_cr(" - resolved_references: " INTPTR_FORMAT, resolved_references()); |
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1832 st->print_cr(" - reference_map: " INTPTR_FORMAT, reference_map()); |
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1833 |
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1834 for (int index = 1; index < length(); index++) { // Index 0 is unused |
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1835 ((ConstantPool*)this)->print_entry_on(index, st); |
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1836 switch (tag_at(index).value()) { |
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1837 case JVM_CONSTANT_Long : |
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1838 case JVM_CONSTANT_Double : |
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1839 index++; // Skip entry following eigth-byte constant |
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1840 } |
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1841 |
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1842 } |
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1843 st->cr(); |
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1844 } |
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1845 |
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1846 // Print one constant pool entry |
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1847 void ConstantPool::print_entry_on(const int index, outputStream* st) { |
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1848 EXCEPTION_MARK; |
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1849 st->print(" - %3d : ", index); |
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1850 tag_at(index).print_on(st); |
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1851 st->print(" : "); |
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1852 switch (tag_at(index).value()) { |
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1853 case JVM_CONSTANT_Class : |
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1854 { Klass* k = klass_at(index, CATCH); |
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1855 k->print_value_on(st); |
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1856 st->print(" {0x%lx}", (address)k); |
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1857 } |
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1858 break; |
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1859 case JVM_CONSTANT_Fieldref : |
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1860 case JVM_CONSTANT_Methodref : |
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1861 case JVM_CONSTANT_InterfaceMethodref : |
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1862 st->print("klass_index=%d", uncached_klass_ref_index_at(index)); |
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1863 st->print(" name_and_type_index=%d", uncached_name_and_type_ref_index_at(index)); |
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1864 break; |
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1865 case JVM_CONSTANT_String : |
8104 | 1866 if (is_pseudo_string_at(index)) { |
1867 oop anObj = pseudo_string_at(index); | |
1868 anObj->print_value_on(st); | |
1869 st->print(" {0x%lx}", (address)anObj); | |
1870 } else { | |
1871 unresolved_string_at(index)->print_value_on(st); | |
1872 } | |
6725
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1873 break; |
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1874 case JVM_CONSTANT_Integer : |
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1875 st->print("%d", int_at(index)); |
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1876 break; |
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1877 case JVM_CONSTANT_Float : |
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1878 st->print("%f", float_at(index)); |
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1879 break; |
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1880 case JVM_CONSTANT_Long : |
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1881 st->print_jlong(long_at(index)); |
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1882 break; |
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1883 case JVM_CONSTANT_Double : |
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1884 st->print("%lf", double_at(index)); |
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1885 break; |
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1886 case JVM_CONSTANT_NameAndType : |
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1887 st->print("name_index=%d", name_ref_index_at(index)); |
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1888 st->print(" signature_index=%d", signature_ref_index_at(index)); |
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1889 break; |
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1890 case JVM_CONSTANT_Utf8 : |
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1891 symbol_at(index)->print_value_on(st); |
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1892 break; |
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1893 case JVM_CONSTANT_UnresolvedClass : // fall-through |
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1894 case JVM_CONSTANT_UnresolvedClassInError: { |
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1895 // unresolved_klass_at requires lock or safe world. |
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1896 CPSlot entry = slot_at(index); |
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1897 if (entry.is_resolved()) { |
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1898 entry.get_klass()->print_value_on(st); |
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1899 } else { |
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1900 entry.get_symbol()->print_value_on(st); |
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1901 } |
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1902 } |
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1903 break; |
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1904 case JVM_CONSTANT_MethodHandle : |
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1905 case JVM_CONSTANT_MethodHandleInError : |
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1906 st->print("ref_kind=%d", method_handle_ref_kind_at(index)); |
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1907 st->print(" ref_index=%d", method_handle_index_at(index)); |
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1908 break; |
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1909 case JVM_CONSTANT_MethodType : |
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1910 case JVM_CONSTANT_MethodTypeInError : |
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1911 st->print("signature_index=%d", method_type_index_at(index)); |
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1912 break; |
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1913 case JVM_CONSTANT_InvokeDynamic : |
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1914 { |
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1915 st->print("bootstrap_method_index=%d", invoke_dynamic_bootstrap_method_ref_index_at(index)); |
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1916 st->print(" name_and_type_index=%d", invoke_dynamic_name_and_type_ref_index_at(index)); |
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1917 int argc = invoke_dynamic_argument_count_at(index); |
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1918 if (argc > 0) { |
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1919 for (int arg_i = 0; arg_i < argc; arg_i++) { |
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1920 int arg = invoke_dynamic_argument_index_at(index, arg_i); |
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1921 st->print((arg_i == 0 ? " arguments={%d" : ", %d"), arg); |
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1922 } |
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1923 st->print("}"); |
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1924 } |
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1925 } |
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1926 break; |
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1927 default: |
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1928 ShouldNotReachHere(); |
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1929 break; |
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1930 } |
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1931 st->cr(); |
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1932 } |
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1933 |
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1934 void ConstantPool::print_value_on(outputStream* st) const { |
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1935 assert(is_constantPool(), "must be constantPool"); |
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1936 st->print("constant pool [%d]", length()); |
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1937 if (has_preresolution()) st->print("/preresolution"); |
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1938 if (operands() != NULL) st->print("/operands[%d]", operands()->length()); |
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1939 print_address_on(st); |
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1940 st->print(" for "); |
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1941 pool_holder()->print_value_on(st); |
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1942 if (pool_holder() != NULL) { |
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1943 bool extra = (pool_holder()->constants() != this); |
6725
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1944 if (extra) st->print(" (extra)"); |
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1945 } |
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1946 if (cache() != NULL) { |
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1947 st->print(" cache=" PTR_FORMAT, cache()); |
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1948 } |
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1949 } |
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1950 |
7956 | 1951 #if INCLUDE_SERVICES |
1952 // Size Statistics | |
1953 void ConstantPool::collect_statistics(KlassSizeStats *sz) const { | |
1954 sz->_cp_all_bytes += (sz->_cp_bytes = sz->count(this)); | |
1955 sz->_cp_all_bytes += (sz->_cp_tags_bytes = sz->count_array(tags())); | |
1956 sz->_cp_all_bytes += (sz->_cp_cache_bytes = sz->count(cache())); | |
1957 sz->_cp_all_bytes += (sz->_cp_operands_bytes = sz->count_array(operands())); | |
1958 sz->_cp_all_bytes += (sz->_cp_refmap_bytes = sz->count_array(reference_map())); | |
1959 | |
1960 sz->_ro_bytes += sz->_cp_operands_bytes + sz->_cp_tags_bytes + | |
1961 sz->_cp_refmap_bytes; | |
1962 sz->_rw_bytes += sz->_cp_bytes + sz->_cp_cache_bytes; | |
1963 } | |
1964 #endif // INCLUDE_SERVICES | |
6725
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1965 |
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1966 // Verification |
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1967 |
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1968 void ConstantPool::verify_on(outputStream* st) { |
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1969 guarantee(is_constantPool(), "object must be constant pool"); |
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1970 for (int i = 0; i< length(); i++) { |
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1971 constantTag tag = tag_at(i); |
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1972 CPSlot entry = slot_at(i); |
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1973 if (tag.is_klass()) { |
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1974 if (entry.is_resolved()) { |
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1975 guarantee(entry.get_klass()->is_metadata(), "should be metadata"); |
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1976 guarantee(entry.get_klass()->is_klass(), "should be klass"); |
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1977 } |
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1978 } else if (tag.is_unresolved_klass()) { |
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1979 if (entry.is_resolved()) { |
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1980 guarantee(entry.get_klass()->is_metadata(), "should be metadata"); |
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1981 guarantee(entry.get_klass()->is_klass(), "should be klass"); |
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1982 } |
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1983 } else if (tag.is_symbol()) { |
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1984 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count"); |
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1985 } else if (tag.is_string()) { |
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1986 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count"); |
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1987 } |
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1988 } |
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1989 if (cache() != NULL) { |
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1990 // Note: cache() can be NULL before a class is completely setup or |
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1991 // in temporary constant pools used during constant pool merging |
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1992 guarantee(cache()->is_metadata(), "should be metadata"); |
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1993 guarantee(cache()->is_constantPoolCache(), "should be constant pool cache"); |
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1994 } |
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1995 if (pool_holder() != NULL) { |
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1996 // Note: pool_holder() can be NULL in temporary constant pools |
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1997 // used during constant pool merging |
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1998 guarantee(pool_holder()->is_metadata(), "should be metadata"); |
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1999 guarantee(pool_holder()->is_klass(), "should be klass"); |
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2000 } |
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2001 } |
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2002 |
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2003 |
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2004 void SymbolHashMap::add_entry(Symbol* sym, u2 value) { |
0 | 2005 char *str = sym->as_utf8(); |
2006 unsigned int hash = compute_hash(str, sym->utf8_length()); | |
2007 unsigned int index = hash % table_size(); | |
2008 | |
2009 // check if already in map | |
2010 // we prefer the first entry since it is more likely to be what was used in | |
2011 // the class file | |
2012 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
2013 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
2014 if (en->hash() == hash && en->symbol() == sym) { | |
2015 return; // already there | |
2016 } | |
2017 } | |
2018 | |
2019 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); | |
2020 entry->set_next(bucket(index)); | |
2021 _buckets[index].set_entry(entry); | |
2022 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
2023 } | |
2024 | |
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2025 SymbolHashMapEntry* SymbolHashMap::find_entry(Symbol* sym) { |
0 | 2026 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); |
2027 char *str = sym->as_utf8(); | |
2028 int len = sym->utf8_length(); | |
2029 unsigned int hash = SymbolHashMap::compute_hash(str, len); | |
2030 unsigned int index = hash % table_size(); | |
2031 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
2032 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
2033 if (en->hash() == hash && en->symbol() == sym) { | |
2034 return en; | |
2035 } | |
2036 } | |
2037 return NULL; | |
2038 } |