Mercurial > hg > graal-compiler
annotate src/share/vm/oops/constantPool.cpp @ 8002:8391fdd36e1f
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author | dlong |
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date | Sun, 27 Jan 2013 01:07:09 -0800 |
parents | b14da2e6f2dc |
children | 3ac7d10a6572 5daaddd917a1 |
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" |
28 #include "classfile/symbolTable.hpp" | |
29 #include "classfile/systemDictionary.hpp" | |
30 #include "classfile/vmSymbols.hpp" | |
31 #include "interpreter/linkResolver.hpp" | |
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32 #include "memory/metadataFactory.hpp" |
1972 | 33 #include "memory/oopFactory.hpp" |
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34 #include "oops/constantPool.hpp" |
1972 | 35 #include "oops/instanceKlass.hpp" |
36 #include "oops/objArrayKlass.hpp" | |
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37 #include "prims/jvmtiRedefineClasses.hpp" |
1972 | 38 #include "runtime/fieldType.hpp" |
39 #include "runtime/init.hpp" | |
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40 #include "runtime/javaCalls.hpp" |
1972 | 41 #include "runtime/signature.hpp" |
42 #include "runtime/vframe.hpp" | |
0 | 43 |
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44 ConstantPool* ConstantPool::allocate(ClassLoaderData* loader_data, int length, TRAPS) { |
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45 // Tags are RW but comment below applies to tags also. |
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46 Array<u1>* tags = MetadataFactory::new_writeable_array<u1>(loader_data, length, 0, CHECK_NULL); |
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47 |
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48 int size = ConstantPool::size(length); |
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49 |
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50 // CDS considerations: |
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51 // Allocate read-write but may be able to move to read-only at dumping time |
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52 // if all the klasses are resolved. The only other field that is writable is |
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53 // the resolved_references array, which is recreated at startup time. |
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54 // But that could be moved to InstanceKlass (although a pain to access from |
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55 // assembly code). Maybe it could be moved to the cpCache which is RW. |
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56 return new (loader_data, size, false, THREAD) ConstantPool(tags); |
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57 } |
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58 |
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59 ConstantPool::ConstantPool(Array<u1>* tags) { |
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60 set_length(tags->length()); |
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61 set_tags(NULL); |
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62 set_cache(NULL); |
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63 set_reference_map(NULL); |
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64 set_resolved_references(NULL); |
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65 set_operands(NULL); |
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66 set_pool_holder(NULL); |
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67 set_flags(0); |
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68 // only set to non-zero if constant pool is merged by RedefineClasses |
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69 set_version(0); |
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70 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock")); |
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71 // all fields are initialized; needed for GC |
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72 set_on_stack(false); |
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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 void ConstantPool::set_flag_at(FlagBit fb) { |
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104 const int MAX_STATE_CHANGES = 2; |
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105 for (int i = MAX_STATE_CHANGES + 10; i > 0; i--) { |
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106 int oflags = _flags; |
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107 int nflags = oflags | (1 << (int)fb); |
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108 if (Atomic::cmpxchg(nflags, &_flags, oflags) == oflags) |
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109 return; |
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110 } |
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111 assert(false, "failed to cmpxchg flags"); |
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112 _flags |= (1 << (int)fb); // better than nothing |
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113 } |
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114 |
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115 objArrayOop ConstantPool::resolved_references() const { |
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116 return (objArrayOop)JNIHandles::resolve(_resolved_references); |
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117 } |
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118 |
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119 // Create resolved_references array and mapping array for original cp indexes |
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120 // The ldc bytecode was rewritten to have the resolved reference array index so need a way |
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121 // to map it back for resolving and some unlikely miscellaneous uses. |
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122 // The objects created by invokedynamic are appended to this list. |
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123 void ConstantPool::initialize_resolved_references(ClassLoaderData* loader_data, |
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124 intStack reference_map, |
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125 int constant_pool_map_length, |
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126 TRAPS) { |
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127 // Initialized the resolved object cache. |
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128 int map_length = reference_map.length(); |
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129 if (map_length > 0) { |
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130 // Only need mapping back to constant pool entries. The map isn't used for |
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131 // invokedynamic resolved_reference entries. The constant pool cache index |
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132 // has the mapping back to both the constant pool and to the resolved |
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133 // reference index. |
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134 if (constant_pool_map_length > 0) { |
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135 Array<u2>* om = MetadataFactory::new_array<u2>(loader_data, map_length, CHECK); |
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136 |
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137 for (int i = 0; i < constant_pool_map_length; i++) { |
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138 int x = reference_map.at(i); |
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139 assert(x == (int)(jushort) x, "klass index is too big"); |
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140 om->at_put(i, (jushort)x); |
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141 } |
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142 set_reference_map(om); |
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143 } |
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144 |
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145 // Create Java array for holding resolved strings, methodHandles, |
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146 // methodTypes, invokedynamic and invokehandle appendix objects, etc. |
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147 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK); |
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148 Handle refs_handle (THREAD, (oop)stom); // must handleize. |
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149 set_resolved_references(loader_data->add_handle(refs_handle)); |
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150 } |
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151 } |
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152 |
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153 // CDS support. Create a new resolved_references array. |
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154 void ConstantPool::restore_unshareable_info(TRAPS) { |
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155 |
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156 // restore the C++ vtable from the shared archive |
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157 restore_vtable(); |
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158 |
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159 if (SystemDictionary::Object_klass_loaded()) { |
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160 // Recreate the object array and add to ClassLoaderData. |
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161 int map_length = resolved_reference_length(); |
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162 if (map_length > 0) { |
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163 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK); |
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164 Handle refs_handle (THREAD, (oop)stom); // must handleize. |
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165 |
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166 ClassLoaderData* loader_data = pool_holder()->class_loader_data(); |
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167 set_resolved_references(loader_data->add_handle(refs_handle)); |
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168 } |
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169 |
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170 // Also need to recreate the mutex. Make sure this matches the constructor |
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171 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock")); |
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172 } |
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173 } |
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174 |
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175 void ConstantPool::remove_unshareable_info() { |
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176 // Resolved references are not in the shared archive. |
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177 // Save the length for restoration. It is not necessarily the same length |
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178 // as reference_map.length() if invokedynamic is saved. |
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179 set_resolved_reference_length( |
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180 resolved_references() != NULL ? resolved_references()->length() : 0); |
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181 set_resolved_references(NULL); |
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182 set_lock(NULL); |
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183 } |
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184 |
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185 int ConstantPool::cp_to_object_index(int cp_index) { |
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186 // this is harder don't do this so much. |
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187 for (int i = 0; i< reference_map()->length(); i++) { |
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188 if (reference_map()->at(i) == cp_index) return i; |
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189 // Zero entry is divider between constant pool indices for strings, |
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190 // method handles and method types. After that the index is a constant |
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191 // pool cache index for invokedynamic. Stop when zero (which can never |
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192 // be a constant pool index) |
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193 if (reference_map()->at(i) == 0) break; |
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194 } |
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195 // We might not find the index. |
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196 return _no_index_sentinel; |
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197 } |
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198 |
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199 Klass* ConstantPool::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) { |
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200 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*. |
0 | 201 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and |
202 // tag is not updated atomicly. | |
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203 |
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204 CPSlot entry = this_oop->slot_at(which); |
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205 if (entry.is_resolved()) { |
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206 assert(entry.get_klass()->is_klass(), "must be"); |
0 | 207 // Already resolved - return entry. |
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208 return entry.get_klass(); |
0 | 209 } |
210 | |
211 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object | |
212 // already has updated the object | |
213 assert(THREAD->is_Java_thread(), "must be a Java thread"); | |
214 bool do_resolve = false; | |
215 bool in_error = false; | |
216 | |
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217 // Create a handle for the mirror. This will preserve the resolved class |
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218 // until the loader_data is registered. |
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219 Handle mirror_handle; |
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220 |
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221 Symbol* name = NULL; |
0 | 222 Handle loader; |
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223 { MonitorLockerEx ml(this_oop->lock()); |
0 | 224 |
225 if (this_oop->tag_at(which).is_unresolved_klass()) { | |
226 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
227 in_error = true; | |
228 } else { | |
229 do_resolve = true; | |
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230 name = this_oop->unresolved_klass_at(which); |
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231 loader = Handle(THREAD, this_oop->pool_holder()->class_loader()); |
0 | 232 } |
233 } | |
234 } // unlocking constantPool | |
235 | |
236 | |
237 // The original attempt to resolve this constant pool entry failed so find the | |
238 // original error and throw it again (JVMS 5.4.3). | |
239 if (in_error) { | |
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240 Symbol* error = SystemDictionary::find_resolution_error(this_oop, which); |
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241 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table"); |
0 | 242 ResourceMark rm; |
243 // exception text will be the class name | |
244 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
245 THROW_MSG_0(error, className); | |
246 } | |
247 | |
248 if (do_resolve) { | |
249 // this_oop must be unlocked during resolve_or_fail | |
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250 oop protection_domain = this_oop->pool_holder()->protection_domain(); |
0 | 251 Handle h_prot (THREAD, protection_domain); |
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252 Klass* k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD); |
0 | 253 KlassHandle k; |
254 if (!HAS_PENDING_EXCEPTION) { | |
255 k = KlassHandle(THREAD, k_oop); | |
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256 // preserve the resolved klass. |
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257 mirror_handle = Handle(THREAD, k_oop->java_mirror()); |
0 | 258 // Do access check for klasses |
259 verify_constant_pool_resolve(this_oop, k, THREAD); | |
260 } | |
261 | |
262 // Failed to resolve class. We must record the errors so that subsequent attempts | |
263 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3). | |
264 if (HAS_PENDING_EXCEPTION) { | |
265 ResourceMark rm; | |
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266 Symbol* error = PENDING_EXCEPTION->klass()->name(); |
0 | 267 |
268 bool throw_orig_error = false; | |
269 { | |
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270 MonitorLockerEx ml(this_oop->lock()); |
0 | 271 |
272 // some other thread has beaten us and has resolved the class. | |
273 if (this_oop->tag_at(which).is_klass()) { | |
274 CLEAR_PENDING_EXCEPTION; | |
275 entry = this_oop->resolved_klass_at(which); | |
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276 return entry.get_klass(); |
0 | 277 } |
278 | |
279 if (!PENDING_EXCEPTION-> | |
1142 | 280 is_a(SystemDictionary::LinkageError_klass())) { |
0 | 281 // Just throw the exception and don't prevent these classes from |
282 // being loaded due to virtual machine errors like StackOverflow | |
283 // and OutOfMemoryError, etc, or if the thread was hit by stop() | |
284 // Needs clarification to section 5.4.3 of the VM spec (see 6308271) | |
285 } | |
286 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
287 SystemDictionary::add_resolution_error(this_oop, which, error); | |
288 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError); | |
289 } else { | |
290 // some other thread has put the class in error state. | |
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291 error = SystemDictionary::find_resolution_error(this_oop, which); |
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292 assert(error != NULL, "checking"); |
0 | 293 throw_orig_error = true; |
294 } | |
295 } // unlocked | |
296 | |
297 if (throw_orig_error) { | |
298 CLEAR_PENDING_EXCEPTION; | |
299 ResourceMark rm; | |
300 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
301 THROW_MSG_0(error, className); | |
302 } | |
303 | |
304 return 0; | |
305 } | |
306 | |
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307 if (TraceClassResolution && !k()->oop_is_array()) { |
0 | 308 // skip resolving the constant pool so that this code get's |
309 // called the next time some bytecodes refer to this class. | |
310 ResourceMark rm; | |
311 int line_number = -1; | |
312 const char * source_file = NULL; | |
313 if (JavaThread::current()->has_last_Java_frame()) { | |
314 // try to identify the method which called this function. | |
315 vframeStream vfst(JavaThread::current()); | |
316 if (!vfst.at_end()) { | |
317 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
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318 Symbol* s = vfst.method()->method_holder()->source_file_name(); |
0 | 319 if (s != NULL) { |
320 source_file = s->as_C_string(); | |
321 } | |
322 } | |
323 } | |
324 if (k() != this_oop->pool_holder()) { | |
325 // only print something if the classes are different | |
326 if (source_file != NULL) { | |
327 tty->print("RESOLVE %s %s %s:%d\n", | |
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328 this_oop->pool_holder()->external_name(), |
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329 InstanceKlass::cast(k())->external_name(), source_file, line_number); |
0 | 330 } else { |
331 tty->print("RESOLVE %s %s\n", | |
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332 this_oop->pool_holder()->external_name(), |
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333 InstanceKlass::cast(k())->external_name()); |
0 | 334 } |
335 } | |
336 return k(); | |
337 } else { | |
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338 MonitorLockerEx ml(this_oop->lock()); |
0 | 339 // Only updated constant pool - if it is resolved. |
340 do_resolve = this_oop->tag_at(which).is_unresolved_klass(); | |
341 if (do_resolve) { | |
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342 ClassLoaderData* this_key = this_oop->pool_holder()->class_loader_data(); |
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343 this_key->record_dependency(k(), CHECK_NULL); // Can throw OOM |
0 | 344 this_oop->klass_at_put(which, k()); |
345 } | |
346 } | |
347 } | |
348 | |
349 entry = this_oop->resolved_klass_at(which); | |
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350 assert(entry.is_resolved() && entry.get_klass()->is_klass(), "must be resolved at this point"); |
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351 return entry.get_klass(); |
0 | 352 } |
353 | |
354 | |
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355 // Does not update ConstantPool* - to avoid any exception throwing. Used |
0 | 356 // by compiler and exception handling. Also used to avoid classloads for |
357 // instanceof operations. Returns NULL if the class has not been loaded or | |
358 // if the verification of constant pool failed | |
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359 Klass* ConstantPool::klass_at_if_loaded(constantPoolHandle this_oop, int which) { |
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360 CPSlot entry = this_oop->slot_at(which); |
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361 if (entry.is_resolved()) { |
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362 assert(entry.get_klass()->is_klass(), "must be"); |
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363 return entry.get_klass(); |
0 | 364 } else { |
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365 assert(entry.is_unresolved(), "must be either symbol or klass"); |
0 | 366 Thread *thread = Thread::current(); |
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367 Symbol* name = entry.get_symbol(); |
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368 oop loader = this_oop->pool_holder()->class_loader(); |
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369 oop protection_domain = this_oop->pool_holder()->protection_domain(); |
0 | 370 Handle h_prot (thread, protection_domain); |
371 Handle h_loader (thread, loader); | |
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372 Klass* k = SystemDictionary::find(name, h_loader, h_prot, thread); |
0 | 373 |
374 if (k != NULL) { | |
375 // Make sure that resolving is legal | |
376 EXCEPTION_MARK; | |
377 KlassHandle klass(THREAD, k); | |
378 // return NULL if verification fails | |
379 verify_constant_pool_resolve(this_oop, klass, THREAD); | |
380 if (HAS_PENDING_EXCEPTION) { | |
381 CLEAR_PENDING_EXCEPTION; | |
382 return NULL; | |
383 } | |
384 return klass(); | |
385 } else { | |
386 return k; | |
387 } | |
388 } | |
389 } | |
390 | |
391 | |
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392 Klass* ConstantPool::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) { |
0 | 393 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which)); |
394 } | |
395 | |
396 | |
397 // This is an interface for the compiler that allows accessing non-resolved entries | |
398 // in the constant pool - but still performs the validations tests. Must be used | |
399 // in a pre-parse of the compiler - to determine what it can do and not do. | |
400 // Note: We cannot update the ConstantPool from the vm_thread. | |
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401 Klass* ConstantPool::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) { |
0 | 402 int which = this_oop->klass_ref_index_at(index); |
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403 CPSlot entry = this_oop->slot_at(which); |
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404 if (entry.is_resolved()) { |
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405 assert(entry.get_klass()->is_klass(), "must be"); |
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406 return entry.get_klass(); |
0 | 407 } else { |
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408 assert(entry.is_unresolved(), "must be either symbol or klass"); |
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409 Symbol* name = entry.get_symbol(); |
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410 oop loader = this_oop->pool_holder()->class_loader(); |
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411 oop protection_domain = this_oop->pool_holder()->protection_domain(); |
0 | 412 Handle h_loader(THREAD, loader); |
413 Handle h_prot (THREAD, protection_domain); | |
414 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD)); | |
415 | |
416 // Do access check for klasses | |
417 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL); | |
418 return k(); | |
419 } | |
420 } | |
421 | |
422 | |
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423 Method* ConstantPool::method_at_if_loaded(constantPoolHandle cpool, |
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424 int which) { |
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425 if (cpool->cache() == NULL) return NULL; // nothing to load yet |
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426 int cache_index = decode_cpcache_index(which, true); |
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427 if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) { |
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428 // FIXME: should be an assert |
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429 if (PrintMiscellaneous && (Verbose||WizardMode)) { |
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430 tty->print_cr("bad operand %d in:", which); cpool->print(); |
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431 } |
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432 return NULL; |
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433 } |
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434 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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435 return e->method_if_resolved(cpool); |
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436 } |
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437 |
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438 |
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439 bool ConstantPool::has_appendix_at_if_loaded(constantPoolHandle cpool, int which) { |
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440 if (cpool->cache() == NULL) return false; // nothing to load yet |
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441 int cache_index = decode_cpcache_index(which, true); |
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442 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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443 return e->has_appendix(); |
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444 } |
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445 |
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446 oop ConstantPool::appendix_at_if_loaded(constantPoolHandle cpool, int which) { |
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447 if (cpool->cache() == NULL) return NULL; // nothing to load yet |
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448 int cache_index = decode_cpcache_index(which, true); |
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449 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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450 return e->appendix_if_resolved(cpool); |
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451 } |
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452 |
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453 |
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454 bool ConstantPool::has_method_type_at_if_loaded(constantPoolHandle cpool, int which) { |
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455 if (cpool->cache() == NULL) return false; // nothing to load yet |
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456 int cache_index = decode_cpcache_index(which, true); |
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457 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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458 return e->has_method_type(); |
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459 } |
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460 |
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461 oop ConstantPool::method_type_at_if_loaded(constantPoolHandle cpool, int which) { |
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462 if (cpool->cache() == NULL) return NULL; // nothing to load yet |
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463 int cache_index = decode_cpcache_index(which, true); |
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464 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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465 return e->method_type_if_resolved(cpool); |
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466 } |
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467 |
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468 |
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469 Symbol* ConstantPool::impl_name_ref_at(int which, bool uncached) { |
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470 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
0 | 471 return symbol_at(name_index); |
472 } | |
473 | |
474 | |
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475 Symbol* ConstantPool::impl_signature_ref_at(int which, bool uncached) { |
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476 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
0 | 477 return symbol_at(signature_index); |
478 } | |
479 | |
480 | |
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481 int ConstantPool::impl_name_and_type_ref_index_at(int which, bool uncached) { |
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482 int i = which; |
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483 if (!uncached && cache() != NULL) { |
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484 if (ConstantPool::is_invokedynamic_index(which)) { |
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485 // Invokedynamic index is index into resolved_references |
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486 int pool_index = invokedynamic_cp_cache_entry_at(which)->constant_pool_index(); |
2460 | 487 pool_index = invoke_dynamic_name_and_type_ref_index_at(pool_index); |
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488 assert(tag_at(pool_index).is_name_and_type(), ""); |
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489 return pool_index; |
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490 } |
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491 // change byte-ordering and go via cache |
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492 i = remap_instruction_operand_from_cache(which); |
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493 } else { |
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494 if (tag_at(which).is_invoke_dynamic()) { |
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495 int pool_index = invoke_dynamic_name_and_type_ref_index_at(which); |
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496 assert(tag_at(pool_index).is_name_and_type(), ""); |
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497 return pool_index; |
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498 } |
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499 } |
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500 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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501 assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above"); |
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502 jint ref_index = *int_at_addr(i); |
0 | 503 return extract_high_short_from_int(ref_index); |
504 } | |
505 | |
506 | |
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507 int ConstantPool::impl_klass_ref_index_at(int which, bool uncached) { |
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508 guarantee(!ConstantPool::is_invokedynamic_index(which), |
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509 "an invokedynamic instruction does not have a klass"); |
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510 int i = which; |
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511 if (!uncached && cache() != NULL) { |
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512 // change byte-ordering and go via cache |
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513 i = remap_instruction_operand_from_cache(which); |
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514 } |
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515 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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516 jint ref_index = *int_at_addr(i); |
0 | 517 return extract_low_short_from_int(ref_index); |
518 } | |
519 | |
520 | |
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521 |
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522 int ConstantPool::remap_instruction_operand_from_cache(int operand) { |
1565 | 523 int cpc_index = operand; |
524 DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG); | |
525 assert((int)(u2)cpc_index == cpc_index, "clean u2"); | |
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526 int member_index = cache()->entry_at(cpc_index)->constant_pool_index(); |
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527 return member_index; |
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528 } |
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529 |
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530 |
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531 void ConstantPool::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { |
0 | 532 if (k->oop_is_instance() || k->oop_is_objArray()) { |
533 instanceKlassHandle holder (THREAD, this_oop->pool_holder()); | |
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534 Klass* elem_oop = k->oop_is_instance() ? k() : ObjArrayKlass::cast(k())->bottom_klass(); |
0 | 535 KlassHandle element (THREAD, elem_oop); |
536 | |
537 // The element type could be a typeArray - we only need the access check if it is | |
538 // an reference to another class | |
539 if (element->oop_is_instance()) { | |
540 LinkResolver::check_klass_accessability(holder, element, CHECK); | |
541 } | |
542 } | |
543 } | |
544 | |
545 | |
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546 int ConstantPool::name_ref_index_at(int which_nt) { |
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547 jint ref_index = name_and_type_at(which_nt); |
0 | 548 return extract_low_short_from_int(ref_index); |
549 } | |
550 | |
551 | |
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552 int ConstantPool::signature_ref_index_at(int which_nt) { |
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553 jint ref_index = name_and_type_at(which_nt); |
0 | 554 return extract_high_short_from_int(ref_index); |
555 } | |
556 | |
557 | |
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558 Klass* ConstantPool::klass_ref_at(int which, TRAPS) { |
0 | 559 return klass_at(klass_ref_index_at(which), CHECK_NULL); |
560 } | |
561 | |
562 | |
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563 Symbol* ConstantPool::klass_name_at(int which) { |
0 | 564 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), |
565 "Corrupted constant pool"); | |
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566 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*. |
0 | 567 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and |
568 // tag is not updated atomicly. | |
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569 CPSlot entry = slot_at(which); |
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570 if (entry.is_resolved()) { |
0 | 571 // Already resolved - return entry's name. |
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572 assert(entry.get_klass()->is_klass(), "must be"); |
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573 return entry.get_klass()->name(); |
0 | 574 } else { |
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575 assert(entry.is_unresolved(), "must be either symbol or klass"); |
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576 return entry.get_symbol(); |
0 | 577 } |
578 } | |
579 | |
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580 Symbol* ConstantPool::klass_ref_at_noresolve(int which) { |
0 | 581 jint ref_index = klass_ref_index_at(which); |
582 return klass_at_noresolve(ref_index); | |
583 } | |
584 | |
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585 Symbol* ConstantPool::uncached_klass_ref_at_noresolve(int which) { |
1602 | 586 jint ref_index = uncached_klass_ref_index_at(which); |
587 return klass_at_noresolve(ref_index); | |
588 } | |
589 | |
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590 char* ConstantPool::string_at_noresolve(int which) { |
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591 Symbol* s = unresolved_string_at(which); |
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592 if (s == NULL) { |
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593 return (char*)"<pseudo-string>"; |
0 | 594 } else { |
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595 return unresolved_string_at(which)->as_C_string(); |
0 | 596 } |
597 } | |
598 | |
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599 BasicType ConstantPool::basic_type_for_signature_at(int which) { |
0 | 600 return FieldType::basic_type(symbol_at(which)); |
601 } | |
602 | |
603 | |
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604 void ConstantPool::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { |
0 | 605 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused |
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606 if (this_oop->tag_at(index).is_string()) { |
0 | 607 this_oop->string_at(index, CHECK); |
608 } | |
609 } | |
610 } | |
611 | |
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612 // Resolve all the classes in the constant pool. If they are all resolved, |
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613 // the constant pool is read-only. Enhancement: allocate cp entries to |
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614 // another metaspace, and copy to read-only or read-write space if this |
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615 // bit is set. |
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616 bool ConstantPool::resolve_class_constants(TRAPS) { |
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617 constantPoolHandle cp(THREAD, this); |
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618 for (int index = 1; index < length(); index++) { // Index 0 is unused |
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619 if (tag_at(index).is_unresolved_klass() && |
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620 klass_at_if_loaded(cp, index) == NULL) { |
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621 return false; |
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622 } |
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623 } |
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624 // set_preresolution(); or some bit for future use |
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625 return true; |
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626 } |
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627 |
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628 // If resolution for MethodHandle or MethodType fails, save the exception |
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629 // in the resolution error table, so that the same exception is thrown again. |
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630 void ConstantPool::save_and_throw_exception(constantPoolHandle this_oop, int which, |
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631 int tag, TRAPS) { |
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632 ResourceMark rm; |
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633 Symbol* error = PENDING_EXCEPTION->klass()->name(); |
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634 MonitorLockerEx ml(this_oop->lock()); // lock cpool to change tag. |
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635 |
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636 int error_tag = (tag == JVM_CONSTANT_MethodHandle) ? |
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637 JVM_CONSTANT_MethodHandleInError : JVM_CONSTANT_MethodTypeInError; |
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638 |
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639 if (!PENDING_EXCEPTION-> |
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640 is_a(SystemDictionary::LinkageError_klass())) { |
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641 // Just throw the exception and don't prevent these classes from |
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642 // being loaded due to virtual machine errors like StackOverflow |
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643 // and OutOfMemoryError, etc, or if the thread was hit by stop() |
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644 // Needs clarification to section 5.4.3 of the VM spec (see 6308271) |
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645 |
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646 } else if (this_oop->tag_at(which).value() != error_tag) { |
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647 SystemDictionary::add_resolution_error(this_oop, which, error); |
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648 this_oop->tag_at_put(which, error_tag); |
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649 } else { |
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650 // some other thread has put the class in error state. |
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651 error = SystemDictionary::find_resolution_error(this_oop, which); |
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652 assert(error != NULL, "checking"); |
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653 CLEAR_PENDING_EXCEPTION; |
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654 THROW_MSG(error, ""); |
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655 } |
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656 } |
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657 |
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658 |
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659 // Called to resolve constants in the constant pool and return an oop. |
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660 // Some constant pool entries cache their resolved oop. This is also |
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661 // called to create oops from constants to use in arguments for invokedynamic |
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662 oop ConstantPool::resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS) { |
1602 | 663 oop result_oop = NULL; |
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664 Handle throw_exception; |
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665 |
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666 if (cache_index == _possible_index_sentinel) { |
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667 // It is possible that this constant is one which is cached in the objects. |
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668 // We'll do a linear search. This should be OK because this usage is rare. |
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669 assert(index > 0, "valid index"); |
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670 cache_index = this_oop->cp_to_object_index(index); |
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671 } |
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672 assert(cache_index == _no_index_sentinel || cache_index >= 0, ""); |
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673 assert(index == _no_index_sentinel || index >= 0, ""); |
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674 |
1602 | 675 if (cache_index >= 0) { |
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676 result_oop = this_oop->resolved_references()->obj_at(cache_index); |
1602 | 677 if (result_oop != NULL) { |
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678 return result_oop; |
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679 // That was easy... |
1602 | 680 } |
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681 index = this_oop->object_to_cp_index(cache_index); |
1602 | 682 } |
683 | |
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684 jvalue prim_value; // temp used only in a few cases below |
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685 |
1602 | 686 int tag_value = this_oop->tag_at(index).value(); |
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687 |
1602 | 688 switch (tag_value) { |
689 | |
690 case JVM_CONSTANT_UnresolvedClass: | |
691 case JVM_CONSTANT_UnresolvedClassInError: | |
692 case JVM_CONSTANT_Class: | |
693 { | |
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694 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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695 Klass* resolved = klass_at_impl(this_oop, index, CHECK_NULL); |
1602 | 696 // ldc wants the java mirror. |
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697 result_oop = resolved->java_mirror(); |
1602 | 698 break; |
699 } | |
700 | |
701 case JVM_CONSTANT_String: | |
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702 assert(cache_index != _no_index_sentinel, "should have been set"); |
1602 | 703 if (this_oop->is_pseudo_string_at(index)) { |
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704 result_oop = this_oop->pseudo_string_at(index, cache_index); |
1602 | 705 break; |
706 } | |
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707 result_oop = string_at_impl(this_oop, index, cache_index, CHECK_NULL); |
1602 | 708 break; |
709 | |
710 case JVM_CONSTANT_Object: | |
711 result_oop = this_oop->object_at(index); | |
712 break; | |
713 | |
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714 case JVM_CONSTANT_MethodHandleInError: |
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715 case JVM_CONSTANT_MethodTypeInError: |
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716 { |
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717 Symbol* error = SystemDictionary::find_resolution_error(this_oop, index); |
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718 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table"); |
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719 ResourceMark rm; |
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720 THROW_MSG_0(error, ""); |
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721 break; |
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722 } |
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723 |
1602 | 724 case JVM_CONSTANT_MethodHandle: |
725 { | |
726 int ref_kind = this_oop->method_handle_ref_kind_at(index); | |
727 int callee_index = this_oop->method_handle_klass_index_at(index); | |
2177
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728 Symbol* name = this_oop->method_handle_name_ref_at(index); |
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729 Symbol* signature = this_oop->method_handle_signature_ref_at(index); |
1602 | 730 if (PrintMiscellaneous) |
731 tty->print_cr("resolve JVM_CONSTANT_MethodHandle:%d [%d/%d/%d] %s.%s", | |
732 ref_kind, index, this_oop->method_handle_index_at(index), | |
733 callee_index, name->as_C_string(), signature->as_C_string()); | |
734 KlassHandle callee; | |
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735 { Klass* k = klass_at_impl(this_oop, callee_index, CHECK_NULL); |
1602 | 736 callee = KlassHandle(THREAD, k); |
737 } | |
738 KlassHandle klass(THREAD, this_oop->pool_holder()); | |
739 Handle value = SystemDictionary::link_method_handle_constant(klass, ref_kind, | |
740 callee, name, signature, | |
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741 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_MethodType: | |
750 { | |
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751 Symbol* signature = this_oop->method_type_signature_at(index); |
1602 | 752 if (PrintMiscellaneous) |
753 tty->print_cr("resolve JVM_CONSTANT_MethodType [%d/%d] %s", | |
754 index, this_oop->method_type_index_at(index), | |
755 signature->as_C_string()); | |
756 KlassHandle klass(THREAD, this_oop->pool_holder()); | |
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757 Handle value = SystemDictionary::find_method_handle_type(signature, klass, THREAD); |
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758 result_oop = value(); |
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759 if (HAS_PENDING_EXCEPTION) { |
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760 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL); |
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761 } |
1602 | 762 break; |
763 } | |
764 | |
765 case JVM_CONSTANT_Integer: | |
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766 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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767 prim_value.i = this_oop->int_at(index); |
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768 result_oop = java_lang_boxing_object::create(T_INT, &prim_value, CHECK_NULL); |
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769 break; |
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770 |
1602 | 771 case JVM_CONSTANT_Float: |
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772 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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773 prim_value.f = this_oop->float_at(index); |
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774 result_oop = java_lang_boxing_object::create(T_FLOAT, &prim_value, CHECK_NULL); |
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775 break; |
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776 |
1602 | 777 case JVM_CONSTANT_Long: |
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778 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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779 prim_value.j = this_oop->long_at(index); |
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780 result_oop = java_lang_boxing_object::create(T_LONG, &prim_value, CHECK_NULL); |
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781 break; |
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782 |
1602 | 783 case JVM_CONSTANT_Double: |
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784 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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785 prim_value.d = this_oop->double_at(index); |
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786 result_oop = java_lang_boxing_object::create(T_DOUBLE, &prim_value, CHECK_NULL); |
1602 | 787 break; |
788 | |
789 default: | |
790 DEBUG_ONLY( tty->print_cr("*** %p: tag at CP[%d/%d] = %d", | |
791 this_oop(), index, cache_index, tag_value) ); | |
792 assert(false, "unexpected constant tag"); | |
793 break; | |
794 } | |
795 | |
796 if (cache_index >= 0) { | |
797 // Cache the oop here also. | |
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798 Handle result_handle(THREAD, result_oop); |
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799 MonitorLockerEx ml(this_oop->lock()); // don't know if we really need this |
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800 oop result = this_oop->resolved_references()->obj_at(cache_index); |
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801 // Benign race condition: resolved_references may already be filled in while we were trying to lock. |
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802 // The important thing here is that all threads pick up the same result. |
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803 // It doesn't matter which racing thread wins, as long as only one |
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804 // result is used by all threads, and all future queries. |
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805 // That result may be either a resolved constant or a failure exception. |
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806 if (result == NULL) { |
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807 this_oop->resolved_references()->obj_at_put(cache_index, result_handle()); |
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808 return result_handle(); |
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809 } else { |
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810 // Return the winning thread's result. This can be different than |
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811 // result_handle() for MethodHandles. |
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812 return result; |
1602 | 813 } |
814 } else { | |
815 return result_oop; | |
816 } | |
817 } | |
818 | |
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819 oop ConstantPool::uncached_string_at(int which, TRAPS) { |
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820 Symbol* sym = unresolved_string_at(which); |
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821 oop str = StringTable::intern(sym, CHECK_(NULL)); |
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822 assert(java_lang_String::is_instance(str), "must be string"); |
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823 return str; |
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824 } |
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825 |
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826 |
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827 oop ConstantPool::resolve_bootstrap_specifier_at_impl(constantPoolHandle this_oop, int index, TRAPS) { |
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828 assert(this_oop->tag_at(index).is_invoke_dynamic(), "Corrupted constant pool"); |
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829 |
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830 Handle bsm; |
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831 int argc; |
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832 { |
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833 // JVM_CONSTANT_InvokeDynamic is an ordered pair of [bootm, name&type], plus optional arguments |
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834 // The bootm, being a JVM_CONSTANT_MethodHandle, has its own cache entry. |
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835 // It is accompanied by the optional arguments. |
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836 int bsm_index = this_oop->invoke_dynamic_bootstrap_method_ref_index_at(index); |
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837 oop bsm_oop = this_oop->resolve_possibly_cached_constant_at(bsm_index, CHECK_NULL); |
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838 if (!java_lang_invoke_MethodHandle::is_instance(bsm_oop)) { |
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839 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "BSM not an MethodHandle"); |
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840 } |
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841 |
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842 // Extract the optional static arguments. |
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843 argc = this_oop->invoke_dynamic_argument_count_at(index); |
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844 if (argc == 0) return bsm_oop; |
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845 |
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846 bsm = Handle(THREAD, bsm_oop); |
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847 } |
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848 |
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849 objArrayHandle info; |
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850 { |
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851 objArrayOop info_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), 1+argc, CHECK_NULL); |
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852 info = objArrayHandle(THREAD, info_oop); |
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853 } |
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854 |
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855 info->obj_at_put(0, bsm()); |
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856 for (int i = 0; i < argc; i++) { |
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857 int arg_index = this_oop->invoke_dynamic_argument_index_at(index, i); |
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858 oop arg_oop = this_oop->resolve_possibly_cached_constant_at(arg_index, CHECK_NULL); |
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859 info->obj_at_put(1+i, arg_oop); |
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860 } |
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861 |
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862 return info(); |
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863 } |
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864 |
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865 oop ConstantPool::string_at_impl(constantPoolHandle this_oop, int which, int obj_index, TRAPS) { |
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866 // If the string has already been interned, this entry will be non-null |
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867 oop str = this_oop->resolved_references()->obj_at(obj_index); |
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868 if (str != NULL) return str; |
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869 |
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870 Symbol* sym = this_oop->unresolved_string_at(which); |
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871 str = StringTable::intern(sym, CHECK_(NULL)); |
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872 this_oop->string_at_put(which, obj_index, str); |
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873 assert(java_lang_String::is_instance(str), "must be string"); |
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874 return str; |
0 | 875 } |
876 | |
877 | |
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878 bool ConstantPool::klass_name_at_matches(instanceKlassHandle k, |
0 | 879 int which) { |
2177
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880 // Names are interned, so we can compare Symbol*s directly |
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881 Symbol* cp_name = klass_name_at(which); |
0 | 882 return (cp_name == k->name()); |
883 } | |
884 | |
885 | |
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886 // Iterate over symbols and decrement ones which are Symbol*s. |
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887 // This is done during GC so do not need to lock constantPool unless we |
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888 // have per-thread safepoints. |
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889 // Only decrement the UTF8 symbols. Unresolved classes and strings point to |
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890 // these symbols but didn't increment the reference count. |
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891 void ConstantPool::unreference_symbols() { |
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892 for (int index = 1; index < length(); index++) { // Index 0 is unused |
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893 constantTag tag = tag_at(index); |
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894 if (tag.is_symbol()) { |
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895 symbol_at(index)->decrement_refcount(); |
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896 } |
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897 } |
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898 } |
0 | 899 |
900 | |
901 // Compare this constant pool's entry at index1 to the constant pool | |
902 // cp2's entry at index2. | |
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903 bool ConstantPool::compare_entry_to(int index1, constantPoolHandle cp2, |
0 | 904 int index2, TRAPS) { |
905 | |
906 jbyte t1 = tag_at(index1).value(); | |
907 jbyte t2 = cp2->tag_at(index2).value(); | |
908 | |
909 | |
910 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass | |
911 // when comparing | |
912 if (t1 == JVM_CONSTANT_UnresolvedClassInError) { | |
913 t1 = JVM_CONSTANT_UnresolvedClass; | |
914 } | |
915 if (t2 == JVM_CONSTANT_UnresolvedClassInError) { | |
916 t2 = JVM_CONSTANT_UnresolvedClass; | |
917 } | |
918 | |
919 if (t1 != t2) { | |
920 // Not the same entry type so there is nothing else to check. Note | |
921 // that this style of checking will consider resolved/unresolved | |
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922 // class pairs as different. |
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923 // From the ConstantPool* API point of view, this is correct |
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924 // behavior. See VM_RedefineClasses::merge_constant_pools() to see how this |
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925 // plays out in the context of ConstantPool* merging. |
0 | 926 return false; |
927 } | |
928 | |
929 switch (t1) { | |
930 case JVM_CONSTANT_Class: | |
931 { | |
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932 Klass* k1 = klass_at(index1, CHECK_false); |
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933 Klass* k2 = cp2->klass_at(index2, CHECK_false); |
0 | 934 if (k1 == k2) { |
935 return true; | |
936 } | |
937 } break; | |
938 | |
939 case JVM_CONSTANT_ClassIndex: | |
940 { | |
941 int recur1 = klass_index_at(index1); | |
942 int recur2 = cp2->klass_index_at(index2); | |
943 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
944 if (match) { | |
945 return true; | |
946 } | |
947 } break; | |
948 | |
949 case JVM_CONSTANT_Double: | |
950 { | |
951 jdouble d1 = double_at(index1); | |
952 jdouble d2 = cp2->double_at(index2); | |
953 if (d1 == d2) { | |
954 return true; | |
955 } | |
956 } break; | |
957 | |
958 case JVM_CONSTANT_Fieldref: | |
959 case JVM_CONSTANT_InterfaceMethodref: | |
960 case JVM_CONSTANT_Methodref: | |
961 { | |
962 int recur1 = uncached_klass_ref_index_at(index1); | |
963 int recur2 = cp2->uncached_klass_ref_index_at(index2); | |
964 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
965 if (match) { | |
966 recur1 = uncached_name_and_type_ref_index_at(index1); | |
967 recur2 = cp2->uncached_name_and_type_ref_index_at(index2); | |
968 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
969 if (match) { | |
970 return true; | |
971 } | |
972 } | |
973 } break; | |
974 | |
975 case JVM_CONSTANT_Float: | |
976 { | |
977 jfloat f1 = float_at(index1); | |
978 jfloat f2 = cp2->float_at(index2); | |
979 if (f1 == f2) { | |
980 return true; | |
981 } | |
982 } break; | |
983 | |
984 case JVM_CONSTANT_Integer: | |
985 { | |
986 jint i1 = int_at(index1); | |
987 jint i2 = cp2->int_at(index2); | |
988 if (i1 == i2) { | |
989 return true; | |
990 } | |
991 } break; | |
992 | |
993 case JVM_CONSTANT_Long: | |
994 { | |
995 jlong l1 = long_at(index1); | |
996 jlong l2 = cp2->long_at(index2); | |
997 if (l1 == l2) { | |
998 return true; | |
999 } | |
1000 } break; | |
1001 | |
1002 case JVM_CONSTANT_NameAndType: | |
1003 { | |
1004 int recur1 = name_ref_index_at(index1); | |
1005 int recur2 = cp2->name_ref_index_at(index2); | |
1006 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
1007 if (match) { | |
1008 recur1 = signature_ref_index_at(index1); | |
1009 recur2 = cp2->signature_ref_index_at(index2); | |
1010 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
1011 if (match) { | |
1012 return true; | |
1013 } | |
1014 } | |
1015 } break; | |
1016 | |
1017 case JVM_CONSTANT_StringIndex: | |
1018 { | |
1019 int recur1 = string_index_at(index1); | |
1020 int recur2 = cp2->string_index_at(index2); | |
1021 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
1022 if (match) { | |
1023 return true; | |
1024 } | |
1025 } break; | |
1026 | |
1027 case JVM_CONSTANT_UnresolvedClass: | |
1028 { | |
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1029 Symbol* k1 = unresolved_klass_at(index1); |
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1030 Symbol* k2 = cp2->unresolved_klass_at(index2); |
0 | 1031 if (k1 == k2) { |
1032 return true; | |
1033 } | |
1034 } break; | |
1035 | |
1602 | 1036 case JVM_CONSTANT_MethodType: |
1037 { | |
1038 int k1 = method_type_index_at(index1); | |
1039 int k2 = cp2->method_type_index_at(index2); | |
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1040 bool match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1041 if (match) { |
1602 | 1042 return true; |
1043 } | |
1044 } break; | |
1045 | |
1046 case JVM_CONSTANT_MethodHandle: | |
1047 { | |
1048 int k1 = method_handle_ref_kind_at(index1); | |
1049 int k2 = cp2->method_handle_ref_kind_at(index2); | |
1050 if (k1 == k2) { | |
1051 int i1 = method_handle_index_at(index1); | |
1052 int i2 = cp2->method_handle_index_at(index2); | |
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1053 bool match = compare_entry_to(i1, cp2, i2, CHECK_false); |
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1054 if (match) { |
1602 | 1055 return true; |
1056 } | |
1057 } | |
1058 } break; | |
1059 | |
1660
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1060 case JVM_CONSTANT_InvokeDynamic: |
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1061 { |
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1062 int k1 = invoke_dynamic_bootstrap_method_ref_index_at(index1); |
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1063 int k2 = cp2->invoke_dynamic_bootstrap_method_ref_index_at(index2); |
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1064 bool match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1065 if (!match) return false; |
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1066 k1 = invoke_dynamic_name_and_type_ref_index_at(index1); |
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1067 k2 = cp2->invoke_dynamic_name_and_type_ref_index_at(index2); |
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1068 match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1069 if (!match) return false; |
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1070 int argc = invoke_dynamic_argument_count_at(index1); |
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1071 if (argc == cp2->invoke_dynamic_argument_count_at(index2)) { |
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1072 for (int j = 0; j < argc; j++) { |
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1073 k1 = invoke_dynamic_argument_index_at(index1, j); |
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1074 k2 = cp2->invoke_dynamic_argument_index_at(index2, j); |
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1075 match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1076 if (!match) return false; |
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1077 } |
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1078 return true; // got through loop; all elements equal |
1660
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1079 } |
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1080 } break; |
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1081 |
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1082 case JVM_CONSTANT_String: |
0 | 1083 { |
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1084 Symbol* s1 = unresolved_string_at(index1); |
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1085 Symbol* s2 = cp2->unresolved_string_at(index2); |
0 | 1086 if (s1 == s2) { |
1087 return true; | |
1088 } | |
1089 } break; | |
1090 | |
1091 case JVM_CONSTANT_Utf8: | |
1092 { | |
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1093 Symbol* s1 = symbol_at(index1); |
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1094 Symbol* s2 = cp2->symbol_at(index2); |
0 | 1095 if (s1 == s2) { |
1096 return true; | |
1097 } | |
1098 } break; | |
1099 | |
1100 // Invalid is used as the tag for the second constant pool entry | |
1101 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
1102 // not be seen by itself. | |
1103 case JVM_CONSTANT_Invalid: // fall through | |
1104 | |
1105 default: | |
1106 ShouldNotReachHere(); | |
1107 break; | |
1108 } | |
1109 | |
1110 return false; | |
1111 } // end compare_entry_to() | |
1112 | |
1113 | |
1114 // Copy this constant pool's entries at start_i to end_i (inclusive) | |
1115 // to the constant pool to_cp's entries starting at to_i. A total of | |
1116 // (end_i - start_i) + 1 entries are copied. | |
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1117 void ConstantPool::copy_cp_to_impl(constantPoolHandle from_cp, int start_i, int end_i, |
0 | 1118 constantPoolHandle to_cp, int to_i, TRAPS) { |
1119 | |
1120 int dest_i = to_i; // leave original alone for debug purposes | |
1121 | |
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1122 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { |
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1123 copy_entry_to(from_cp, src_i, to_cp, dest_i, CHECK); |
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1124 |
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1125 switch (from_cp->tag_at(src_i).value()) { |
0 | 1126 case JVM_CONSTANT_Double: |
1127 case JVM_CONSTANT_Long: | |
1128 // double and long take two constant pool entries | |
1129 src_i += 2; | |
1130 dest_i += 2; | |
1131 break; | |
1132 | |
1133 default: | |
1134 // all others take one constant pool entry | |
1135 src_i++; | |
1136 dest_i++; | |
1137 break; | |
1138 } | |
1139 } | |
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1140 |
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1141 int from_oplen = operand_array_length(from_cp->operands()); |
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1142 int old_oplen = operand_array_length(to_cp->operands()); |
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1143 if (from_oplen != 0) { |
6934 | 1144 ClassLoaderData* loader_data = to_cp->pool_holder()->class_loader_data(); |
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1145 // append my operands to the target's operands array |
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1146 if (old_oplen == 0) { |
6934 | 1147 // Can't just reuse from_cp's operand list because of deallocation issues |
1148 int len = from_cp->operands()->length(); | |
1149 Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, len, CHECK); | |
1150 Copy::conjoint_memory_atomic( | |
1151 from_cp->operands()->adr_at(0), new_ops->adr_at(0), len * sizeof(u2)); | |
1152 to_cp->set_operands(new_ops); | |
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1153 } else { |
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1154 int old_len = to_cp->operands()->length(); |
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1155 int from_len = from_cp->operands()->length(); |
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1156 int old_off = old_oplen * sizeof(u2); |
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1157 int from_off = from_oplen * sizeof(u2); |
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1158 // Use the metaspace for the destination constant pool |
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1159 Array<u2>* new_operands = MetadataFactory::new_array<u2>(loader_data, old_len + from_len, CHECK); |
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1160 int fillp = 0, len = 0; |
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1161 // first part of dest |
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1162 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0), |
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1163 new_operands->adr_at(fillp), |
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1164 (len = old_off) * sizeof(u2)); |
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1165 fillp += len; |
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1166 // first part of src |
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1167 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0), |
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1168 new_operands->adr_at(fillp), |
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1169 (len = from_off) * sizeof(u2)); |
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1170 fillp += len; |
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1171 // second part of dest |
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1172 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(old_off), |
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1173 new_operands->adr_at(fillp), |
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1174 (len = old_len - old_off) * sizeof(u2)); |
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1175 fillp += len; |
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1176 // second part of src |
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1177 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(from_off), |
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1178 new_operands->adr_at(fillp), |
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1179 (len = from_len - from_off) * sizeof(u2)); |
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1180 fillp += len; |
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1181 assert(fillp == new_operands->length(), ""); |
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1182 |
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1183 // Adjust indexes in the first part of the copied operands array. |
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1184 for (int j = 0; j < from_oplen; j++) { |
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1185 int offset = operand_offset_at(new_operands, old_oplen + j); |
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1186 assert(offset == operand_offset_at(from_cp->operands(), j), "correct copy"); |
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1187 offset += old_len; // every new tuple is preceded by old_len extra u2's |
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1188 operand_offset_at_put(new_operands, old_oplen + j, offset); |
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1189 } |
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1190 |
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1191 // replace target operands array with combined array |
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1192 to_cp->set_operands(new_operands); |
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1193 } |
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1194 } |
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1195 |
0 | 1196 } // end copy_cp_to() |
1197 | |
1198 | |
1199 // Copy this constant pool's entry at from_i to the constant pool | |
1200 // to_cp's entry at to_i. | |
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1201 void ConstantPool::copy_entry_to(constantPoolHandle from_cp, int from_i, |
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1202 constantPoolHandle to_cp, int to_i, |
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1203 TRAPS) { |
0 | 1204 |
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1205 int tag = from_cp->tag_at(from_i).value(); |
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1206 switch (tag) { |
0 | 1207 case JVM_CONSTANT_Class: |
1208 { | |
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1209 Klass* k = from_cp->klass_at(from_i, CHECK); |
0 | 1210 to_cp->klass_at_put(to_i, k); |
1211 } break; | |
1212 | |
1213 case JVM_CONSTANT_ClassIndex: | |
1214 { | |
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1215 jint ki = from_cp->klass_index_at(from_i); |
0 | 1216 to_cp->klass_index_at_put(to_i, ki); |
1217 } break; | |
1218 | |
1219 case JVM_CONSTANT_Double: | |
1220 { | |
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1221 jdouble d = from_cp->double_at(from_i); |
0 | 1222 to_cp->double_at_put(to_i, d); |
1223 // double takes two constant pool entries so init second entry's tag | |
1224 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
1225 } break; | |
1226 | |
1227 case JVM_CONSTANT_Fieldref: | |
1228 { | |
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1229 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
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1230 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
0 | 1231 to_cp->field_at_put(to_i, class_index, name_and_type_index); |
1232 } break; | |
1233 | |
1234 case JVM_CONSTANT_Float: | |
1235 { | |
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1236 jfloat f = from_cp->float_at(from_i); |
0 | 1237 to_cp->float_at_put(to_i, f); |
1238 } break; | |
1239 | |
1240 case JVM_CONSTANT_Integer: | |
1241 { | |
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1242 jint i = from_cp->int_at(from_i); |
0 | 1243 to_cp->int_at_put(to_i, i); |
1244 } break; | |
1245 | |
1246 case JVM_CONSTANT_InterfaceMethodref: | |
1247 { | |
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1248 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
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1249 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
0 | 1250 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); |
1251 } break; | |
1252 | |
1253 case JVM_CONSTANT_Long: | |
1254 { | |
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1255 jlong l = from_cp->long_at(from_i); |
0 | 1256 to_cp->long_at_put(to_i, l); |
1257 // long takes two constant pool entries so init second entry's tag | |
1258 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
1259 } break; | |
1260 | |
1261 case JVM_CONSTANT_Methodref: | |
1262 { | |
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1263 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
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1264 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
0 | 1265 to_cp->method_at_put(to_i, class_index, name_and_type_index); |
1266 } break; | |
1267 | |
1268 case JVM_CONSTANT_NameAndType: | |
1269 { | |
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1270 int name_ref_index = from_cp->name_ref_index_at(from_i); |
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1271 int signature_ref_index = from_cp->signature_ref_index_at(from_i); |
0 | 1272 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); |
1273 } break; | |
1274 | |
1275 case JVM_CONSTANT_StringIndex: | |
1276 { | |
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1277 jint si = from_cp->string_index_at(from_i); |
0 | 1278 to_cp->string_index_at_put(to_i, si); |
1279 } break; | |
1280 | |
1281 case JVM_CONSTANT_UnresolvedClass: | |
1282 { | |
2332
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1283 // Can be resolved after checking tag, so check the slot first. |
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1284 CPSlot entry = from_cp->slot_at(from_i); |
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1285 if (entry.is_resolved()) { |
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1286 assert(entry.get_klass()->is_klass(), "must be"); |
2332
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1287 // Already resolved |
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1288 to_cp->klass_at_put(to_i, entry.get_klass()); |
2332
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1289 } else { |
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1290 to_cp->unresolved_klass_at_put(to_i, entry.get_symbol()); |
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1291 } |
0 | 1292 } break; |
1293 | |
1294 case JVM_CONSTANT_UnresolvedClassInError: | |
1295 { | |
2177
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1296 Symbol* k = from_cp->unresolved_klass_at(from_i); |
0 | 1297 to_cp->unresolved_klass_at_put(to_i, k); |
1298 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); | |
1299 } break; | |
1300 | |
1301 | |
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1302 case JVM_CONSTANT_String: |
0 | 1303 { |
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1304 Symbol* s = from_cp->unresolved_string_at(from_i); |
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1305 to_cp->unresolved_string_at_put(to_i, s); |
0 | 1306 } break; |
1307 | |
1308 case JVM_CONSTANT_Utf8: | |
1309 { | |
2177
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1310 Symbol* s = from_cp->symbol_at(from_i); |
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1311 // Need to increase refcount, the old one will be thrown away and deferenced |
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1312 s->increment_refcount(); |
0 | 1313 to_cp->symbol_at_put(to_i, s); |
1314 } break; | |
1315 | |
1602 | 1316 case JVM_CONSTANT_MethodType: |
1317 { | |
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1318 jint k = from_cp->method_type_index_at(from_i); |
1602 | 1319 to_cp->method_type_index_at_put(to_i, k); |
1320 } break; | |
1321 | |
1322 case JVM_CONSTANT_MethodHandle: | |
1323 { | |
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1324 int k1 = from_cp->method_handle_ref_kind_at(from_i); |
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1325 int k2 = from_cp->method_handle_index_at(from_i); |
1602 | 1326 to_cp->method_handle_index_at_put(to_i, k1, k2); |
1327 } break; | |
1328 | |
1660
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|
1329 case JVM_CONSTANT_InvokeDynamic: |
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diff
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|
1330 { |
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1331 int k1 = from_cp->invoke_dynamic_bootstrap_specifier_index(from_i); |
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1332 int k2 = from_cp->invoke_dynamic_name_and_type_ref_index_at(from_i); |
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1333 k1 += operand_array_length(to_cp->operands()); // to_cp might already have operands |
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|
1334 to_cp->invoke_dynamic_at_put(to_i, k1, k2); |
1660
083fde3b838e
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1602
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|
1335 } break; |
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|
1336 |
0 | 1337 // Invalid is used as the tag for the second constant pool entry |
1338 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
1339 // not be seen by itself. | |
1340 case JVM_CONSTANT_Invalid: // fall through | |
1341 | |
1342 default: | |
1343 { | |
1344 ShouldNotReachHere(); | |
1345 } break; | |
1346 } | |
1347 } // end copy_entry_to() | |
1348 | |
1349 | |
1350 // Search constant pool search_cp for an entry that matches this | |
1351 // constant pool's entry at pattern_i. Returns the index of a | |
1352 // matching entry or zero (0) if there is no matching entry. | |
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1353 int ConstantPool::find_matching_entry(int pattern_i, |
0 | 1354 constantPoolHandle search_cp, TRAPS) { |
1355 | |
1356 // index zero (0) is not used | |
1357 for (int i = 1; i < search_cp->length(); i++) { | |
1358 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); | |
1359 if (found) { | |
1360 return i; | |
1361 } | |
1362 } | |
1363 | |
1364 return 0; // entry not found; return unused index zero (0) | |
1365 } // end find_matching_entry() | |
1366 | |
1367 | |
1368 #ifndef PRODUCT | |
1369 | |
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1370 const char* ConstantPool::printable_name_at(int which) { |
0 | 1371 |
1372 constantTag tag = tag_at(which); | |
1373 | |
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1374 if (tag.is_string()) { |
0 | 1375 return string_at_noresolve(which); |
1376 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1377 return klass_name_at(which)->as_C_string(); | |
1378 } else if (tag.is_symbol()) { | |
1379 return symbol_at(which)->as_C_string(); | |
1380 } | |
1381 return ""; | |
1382 } | |
1383 | |
1384 #endif // PRODUCT | |
1385 | |
1386 | |
1387 // JVMTI GetConstantPool support | |
1388 | |
1389 // For temporary use until code is stable. | |
1390 #define DBG(code) | |
1391 | |
1392 static const char* WARN_MSG = "Must not be such entry!"; | |
1393 | |
1394 static void print_cpool_bytes(jint cnt, u1 *bytes) { | |
1395 jint size = 0; | |
1396 u2 idx1, idx2; | |
1397 | |
1398 for (jint idx = 1; idx < cnt; idx++) { | |
1399 jint ent_size = 0; | |
1400 u1 tag = *bytes++; | |
1401 size++; // count tag | |
1402 | |
1403 printf("const #%03d, tag: %02d ", idx, tag); | |
1404 switch(tag) { | |
1405 case JVM_CONSTANT_Invalid: { | |
1406 printf("Invalid"); | |
1407 break; | |
1408 } | |
1409 case JVM_CONSTANT_Unicode: { | |
1410 printf("Unicode %s", WARN_MSG); | |
1411 break; | |
1412 } | |
1413 case JVM_CONSTANT_Utf8: { | |
1414 u2 len = Bytes::get_Java_u2(bytes); | |
1415 char str[128]; | |
1416 if (len > 127) { | |
1417 len = 127; | |
1418 } | |
1419 strncpy(str, (char *) (bytes+2), len); | |
1420 str[len] = '\0'; | |
1421 printf("Utf8 \"%s\"", str); | |
1422 ent_size = 2 + len; | |
1423 break; | |
1424 } | |
1425 case JVM_CONSTANT_Integer: { | |
1426 u4 val = Bytes::get_Java_u4(bytes); | |
1427 printf("int %d", *(int *) &val); | |
1428 ent_size = 4; | |
1429 break; | |
1430 } | |
1431 case JVM_CONSTANT_Float: { | |
1432 u4 val = Bytes::get_Java_u4(bytes); | |
1433 printf("float %5.3ff", *(float *) &val); | |
1434 ent_size = 4; | |
1435 break; | |
1436 } | |
1437 case JVM_CONSTANT_Long: { | |
1438 u8 val = Bytes::get_Java_u8(bytes); | |
3960 | 1439 printf("long "INT64_FORMAT, (int64_t) *(jlong *) &val); |
0 | 1440 ent_size = 8; |
1441 idx++; // Long takes two cpool slots | |
1442 break; | |
1443 } | |
1444 case JVM_CONSTANT_Double: { | |
1445 u8 val = Bytes::get_Java_u8(bytes); | |
1446 printf("double %5.3fd", *(jdouble *)&val); | |
1447 ent_size = 8; | |
1448 idx++; // Double takes two cpool slots | |
1449 break; | |
1450 } | |
1451 case JVM_CONSTANT_Class: { | |
1452 idx1 = Bytes::get_Java_u2(bytes); | |
1453 printf("class #%03d", idx1); | |
1454 ent_size = 2; | |
1455 break; | |
1456 } | |
1457 case JVM_CONSTANT_String: { | |
1458 idx1 = Bytes::get_Java_u2(bytes); | |
1459 printf("String #%03d", idx1); | |
1460 ent_size = 2; | |
1461 break; | |
1462 } | |
1463 case JVM_CONSTANT_Fieldref: { | |
1464 idx1 = Bytes::get_Java_u2(bytes); | |
1465 idx2 = Bytes::get_Java_u2(bytes+2); | |
1466 printf("Field #%03d, #%03d", (int) idx1, (int) idx2); | |
1467 ent_size = 4; | |
1468 break; | |
1469 } | |
1470 case JVM_CONSTANT_Methodref: { | |
1471 idx1 = Bytes::get_Java_u2(bytes); | |
1472 idx2 = Bytes::get_Java_u2(bytes+2); | |
1473 printf("Method #%03d, #%03d", idx1, idx2); | |
1474 ent_size = 4; | |
1475 break; | |
1476 } | |
1477 case JVM_CONSTANT_InterfaceMethodref: { | |
1478 idx1 = Bytes::get_Java_u2(bytes); | |
1479 idx2 = Bytes::get_Java_u2(bytes+2); | |
1480 printf("InterfMethod #%03d, #%03d", idx1, idx2); | |
1481 ent_size = 4; | |
1482 break; | |
1483 } | |
1484 case JVM_CONSTANT_NameAndType: { | |
1485 idx1 = Bytes::get_Java_u2(bytes); | |
1486 idx2 = Bytes::get_Java_u2(bytes+2); | |
1487 printf("NameAndType #%03d, #%03d", idx1, idx2); | |
1488 ent_size = 4; | |
1489 break; | |
1490 } | |
1491 case JVM_CONSTANT_ClassIndex: { | |
1492 printf("ClassIndex %s", WARN_MSG); | |
1493 break; | |
1494 } | |
1495 case JVM_CONSTANT_UnresolvedClass: { | |
1496 printf("UnresolvedClass: %s", WARN_MSG); | |
1497 break; | |
1498 } | |
1499 case JVM_CONSTANT_UnresolvedClassInError: { | |
1500 printf("UnresolvedClassInErr: %s", WARN_MSG); | |
1501 break; | |
1502 } | |
1503 case JVM_CONSTANT_StringIndex: { | |
1504 printf("StringIndex: %s", WARN_MSG); | |
1505 break; | |
1506 } | |
1507 } | |
1508 printf(";\n"); | |
1509 bytes += ent_size; | |
1510 size += ent_size; | |
1511 } | |
1512 printf("Cpool size: %d\n", size); | |
1513 fflush(0); | |
1514 return; | |
1515 } /* end print_cpool_bytes */ | |
1516 | |
1517 | |
1518 // Returns size of constant pool entry. | |
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1519 jint ConstantPool::cpool_entry_size(jint idx) { |
0 | 1520 switch(tag_at(idx).value()) { |
1521 case JVM_CONSTANT_Invalid: | |
1522 case JVM_CONSTANT_Unicode: | |
1523 return 1; | |
1524 | |
1525 case JVM_CONSTANT_Utf8: | |
1526 return 3 + symbol_at(idx)->utf8_length(); | |
1527 | |
1528 case JVM_CONSTANT_Class: | |
1529 case JVM_CONSTANT_String: | |
1530 case JVM_CONSTANT_ClassIndex: | |
1531 case JVM_CONSTANT_UnresolvedClass: | |
1532 case JVM_CONSTANT_UnresolvedClassInError: | |
1533 case JVM_CONSTANT_StringIndex: | |
1602 | 1534 case JVM_CONSTANT_MethodType: |
0 | 1535 return 3; |
1536 | |
1602 | 1537 case JVM_CONSTANT_MethodHandle: |
1538 return 4; //tag, ref_kind, ref_index | |
1539 | |
0 | 1540 case JVM_CONSTANT_Integer: |
1541 case JVM_CONSTANT_Float: | |
1542 case JVM_CONSTANT_Fieldref: | |
1543 case JVM_CONSTANT_Methodref: | |
1544 case JVM_CONSTANT_InterfaceMethodref: | |
1545 case JVM_CONSTANT_NameAndType: | |
1913
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1546 return 5; |
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1547 |
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1548 case JVM_CONSTANT_InvokeDynamic: |
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1549 // u1 tag, u2 bsm, u2 nt |
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1550 return 5; |
0 | 1551 |
1552 case JVM_CONSTANT_Long: | |
1553 case JVM_CONSTANT_Double: | |
1554 return 9; | |
1555 } | |
1556 assert(false, "cpool_entry_size: Invalid constant pool entry tag"); | |
1557 return 1; | |
1558 } /* end cpool_entry_size */ | |
1559 | |
1560 | |
1561 // SymbolHashMap is used to find a constant pool index from a string. | |
1562 // This function fills in SymbolHashMaps, one for utf8s and one for | |
1563 // class names, returns size of the cpool raw bytes. | |
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1564 jint ConstantPool::hash_entries_to(SymbolHashMap *symmap, |
0 | 1565 SymbolHashMap *classmap) { |
1566 jint size = 0; | |
1567 | |
1568 for (u2 idx = 1; idx < length(); idx++) { | |
1569 u2 tag = tag_at(idx).value(); | |
1570 size += cpool_entry_size(idx); | |
1571 | |
1572 switch(tag) { | |
1573 case JVM_CONSTANT_Utf8: { | |
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1574 Symbol* sym = symbol_at(idx); |
0 | 1575 symmap->add_entry(sym, idx); |
1576 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); | |
1577 break; | |
1578 } | |
1579 case JVM_CONSTANT_Class: | |
1580 case JVM_CONSTANT_UnresolvedClass: | |
1581 case JVM_CONSTANT_UnresolvedClassInError: { | |
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1582 Symbol* sym = klass_name_at(idx); |
0 | 1583 classmap->add_entry(sym, idx); |
1584 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); | |
1585 break; | |
1586 } | |
1587 case JVM_CONSTANT_Long: | |
1588 case JVM_CONSTANT_Double: { | |
1589 idx++; // Both Long and Double take two cpool slots | |
1590 break; | |
1591 } | |
1592 } | |
1593 } | |
1594 return size; | |
1595 } /* end hash_utf8_entries_to */ | |
1596 | |
1597 | |
1598 // Copy cpool bytes. | |
1599 // Returns: | |
1600 // 0, in case of OutOfMemoryError | |
1601 // -1, in case of internal error | |
1602 // > 0, count of the raw cpool bytes that have been copied | |
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1603 int ConstantPool::copy_cpool_bytes(int cpool_size, |
0 | 1604 SymbolHashMap* tbl, |
1605 unsigned char *bytes) { | |
1606 u2 idx1, idx2; | |
1607 jint size = 0; | |
1608 jint cnt = length(); | |
1609 unsigned char *start_bytes = bytes; | |
1610 | |
1611 for (jint idx = 1; idx < cnt; idx++) { | |
1612 u1 tag = tag_at(idx).value(); | |
1613 jint ent_size = cpool_entry_size(idx); | |
1614 | |
1615 assert(size + ent_size <= cpool_size, "Size mismatch"); | |
1616 | |
1617 *bytes = tag; | |
1618 DBG(printf("#%03hd tag=%03hd, ", idx, tag)); | |
1619 switch(tag) { | |
1620 case JVM_CONSTANT_Invalid: { | |
1621 DBG(printf("JVM_CONSTANT_Invalid")); | |
1622 break; | |
1623 } | |
1624 case JVM_CONSTANT_Unicode: { | |
1625 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); | |
1626 DBG(printf("JVM_CONSTANT_Unicode")); | |
1627 break; | |
1628 } | |
1629 case JVM_CONSTANT_Utf8: { | |
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1630 Symbol* sym = symbol_at(idx); |
0 | 1631 char* str = sym->as_utf8(); |
1632 // Warning! It's crashing on x86 with len = sym->utf8_length() | |
1633 int len = (int) strlen(str); | |
1634 Bytes::put_Java_u2((address) (bytes+1), (u2) len); | |
1635 for (int i = 0; i < len; i++) { | |
1636 bytes[3+i] = (u1) str[i]; | |
1637 } | |
1638 DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); | |
1639 break; | |
1640 } | |
1641 case JVM_CONSTANT_Integer: { | |
1642 jint val = int_at(idx); | |
1643 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1644 break; | |
1645 } | |
1646 case JVM_CONSTANT_Float: { | |
1647 jfloat val = float_at(idx); | |
1648 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1649 break; | |
1650 } | |
1651 case JVM_CONSTANT_Long: { | |
1652 jlong val = long_at(idx); | |
1653 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1654 idx++; // Long takes two cpool slots | |
1655 break; | |
1656 } | |
1657 case JVM_CONSTANT_Double: { | |
1658 jdouble val = double_at(idx); | |
1659 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1660 idx++; // Double takes two cpool slots | |
1661 break; | |
1662 } | |
1663 case JVM_CONSTANT_Class: | |
1664 case JVM_CONSTANT_UnresolvedClass: | |
1665 case JVM_CONSTANT_UnresolvedClassInError: { | |
1666 *bytes = JVM_CONSTANT_Class; | |
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1667 Symbol* sym = klass_name_at(idx); |
0 | 1668 idx1 = tbl->symbol_to_value(sym); |
1669 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1670 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1671 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); | |
1672 break; | |
1673 } | |
1674 case JVM_CONSTANT_String: { | |
1675 *bytes = JVM_CONSTANT_String; | |
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1676 Symbol* sym = unresolved_string_at(idx); |
0 | 1677 idx1 = tbl->symbol_to_value(sym); |
1678 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1679 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1680 DBG(char *str = sym->as_utf8()); | |
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1681 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); |
0 | 1682 break; |
1683 } | |
1684 case JVM_CONSTANT_Fieldref: | |
1685 case JVM_CONSTANT_Methodref: | |
1686 case JVM_CONSTANT_InterfaceMethodref: { | |
1687 idx1 = uncached_klass_ref_index_at(idx); | |
1688 idx2 = uncached_name_and_type_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_Methodref: %hd %hd", idx1, idx2)); | |
1692 break; | |
1693 } | |
1694 case JVM_CONSTANT_NameAndType: { | |
1695 idx1 = name_ref_index_at(idx); | |
1696 idx2 = signature_ref_index_at(idx); | |
1697 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1698 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1699 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); | |
1700 break; | |
1701 } | |
1702 case JVM_CONSTANT_ClassIndex: { | |
1703 *bytes = JVM_CONSTANT_Class; | |
1704 idx1 = klass_index_at(idx); | |
1705 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1706 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); | |
1707 break; | |
1708 } | |
1709 case JVM_CONSTANT_StringIndex: { | |
1710 *bytes = JVM_CONSTANT_String; | |
1711 idx1 = string_index_at(idx); | |
1712 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1713 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); | |
1714 break; | |
1715 } | |
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1716 case JVM_CONSTANT_MethodHandle: |
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1717 case JVM_CONSTANT_MethodHandleInError: { |
1602 | 1718 *bytes = JVM_CONSTANT_MethodHandle; |
1719 int kind = method_handle_ref_kind_at(idx); | |
1720 idx1 = method_handle_index_at(idx); | |
1721 *(bytes+1) = (unsigned char) kind; | |
1722 Bytes::put_Java_u2((address) (bytes+2), idx1); | |
1723 DBG(printf("JVM_CONSTANT_MethodHandle: %d %hd", kind, idx1)); | |
1724 break; | |
1725 } | |
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1726 case JVM_CONSTANT_MethodType: |
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1727 case JVM_CONSTANT_MethodTypeInError: { |
1602 | 1728 *bytes = JVM_CONSTANT_MethodType; |
1729 idx1 = method_type_index_at(idx); | |
1730 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1731 DBG(printf("JVM_CONSTANT_MethodType: %hd", idx1)); | |
1732 break; | |
1733 } | |
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1734 case JVM_CONSTANT_InvokeDynamic: { |
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1735 *bytes = tag; |
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1736 idx1 = extract_low_short_from_int(*int_at_addr(idx)); |
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1737 idx2 = extract_high_short_from_int(*int_at_addr(idx)); |
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1738 assert(idx2 == invoke_dynamic_name_and_type_ref_index_at(idx), "correct half of u4"); |
1660
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1739 Bytes::put_Java_u2((address) (bytes+1), idx1); |
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1740 Bytes::put_Java_u2((address) (bytes+3), idx2); |
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1741 DBG(printf("JVM_CONSTANT_InvokeDynamic: %hd %hd", idx1, idx2)); |
1660
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1742 break; |
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1743 } |
0 | 1744 } |
1745 DBG(printf("\n")); | |
1746 bytes += ent_size; | |
1747 size += ent_size; | |
1748 } | |
1749 assert(size == cpool_size, "Size mismatch"); | |
1750 | |
1751 // Keep temorarily for debugging until it's stable. | |
1752 DBG(print_cpool_bytes(cnt, start_bytes)); | |
1753 return (int)(bytes - start_bytes); | |
1754 } /* end copy_cpool_bytes */ | |
1755 | |
1756 | |
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1757 void ConstantPool::set_on_stack(const bool value) { |
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1758 _on_stack = value; |
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1759 if (value) MetadataOnStackMark::record(this); |
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1760 } |
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1761 |
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1762 // JSR 292 support for patching constant pool oops after the class is linked and |
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1763 // the oop array for resolved references are created. |
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1764 // We can't do this during classfile parsing, which is how the other indexes are |
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1765 // patched. The other patches are applied early for some error checking |
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1766 // so only defer the pseudo_strings. |
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1767 void ConstantPool::patch_resolved_references( |
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1768 GrowableArray<Handle>* cp_patches) { |
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1769 assert(EnableInvokeDynamic, ""); |
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1770 for (int index = 1; index < cp_patches->length(); index++) { // Index 0 is unused |
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1771 Handle patch = cp_patches->at(index); |
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1772 if (patch.not_null()) { |
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1773 assert (tag_at(index).is_string(), "should only be string left"); |
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1774 // Patching a string means pre-resolving it. |
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1775 // The spelling in the constant pool is ignored. |
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1776 // The constant reference may be any object whatever. |
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1777 // If it is not a real interned string, the constant is referred |
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1778 // to as a "pseudo-string", and must be presented to the CP |
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1779 // explicitly, because it may require scavenging. |
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1780 int obj_index = cp_to_object_index(index); |
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1781 pseudo_string_at_put(index, obj_index, patch()); |
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1782 DEBUG_ONLY(cp_patches->at_put(index, Handle());) |
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1783 } |
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1784 } |
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1785 #ifdef ASSERT |
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1786 // Ensure that all the patches have been used. |
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1787 for (int index = 0; index < cp_patches->length(); index++) { |
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1788 assert(cp_patches->at(index).is_null(), |
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1789 err_msg("Unused constant pool patch at %d in class file %s", |
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1790 index, |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
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1791 pool_holder()->external_name())); |
6725
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1792 } |
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1793 #endif // ASSERT |
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1794 } |
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1795 |
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1796 #ifndef PRODUCT |
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1797 |
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1798 // CompileTheWorld support. Preload all classes loaded references in the passed in constantpool |
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1799 void ConstantPool::preload_and_initialize_all_classes(ConstantPool* obj, TRAPS) { |
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1800 guarantee(obj->is_constantPool(), "object must be constant pool"); |
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1801 constantPoolHandle cp(THREAD, (ConstantPool*)obj); |
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1802 guarantee(cp->pool_holder() != NULL, "must be fully loaded"); |
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1803 |
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1804 for (int i = 0; i< cp->length(); i++) { |
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1805 if (cp->tag_at(i).is_unresolved_klass()) { |
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1806 // This will force loading of the class |
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1807 Klass* klass = cp->klass_at(i, CHECK); |
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1808 if (klass->oop_is_instance()) { |
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1809 // Force initialization of class |
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1810 InstanceKlass::cast(klass)->initialize(CHECK); |
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1811 } |
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1812 } |
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1813 } |
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1814 } |
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1815 |
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1816 #endif |
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1817 |
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1818 |
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1819 // Printing |
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1820 |
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1821 void ConstantPool::print_on(outputStream* st) const { |
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1822 EXCEPTION_MARK; |
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1823 assert(is_constantPool(), "must be constantPool"); |
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1824 st->print_cr(internal_name()); |
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1825 if (flags() != 0) { |
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1826 st->print(" - flags: 0x%x", flags()); |
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1827 if (has_pseudo_string()) st->print(" has_pseudo_string"); |
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1828 if (has_invokedynamic()) st->print(" has_invokedynamic"); |
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1829 if (has_preresolution()) st->print(" has_preresolution"); |
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1830 st->cr(); |
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1831 } |
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1832 if (pool_holder() != NULL) { |
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1833 st->print_cr(" - holder: " INTPTR_FORMAT, pool_holder()); |
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1834 } |
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1835 st->print_cr(" - cache: " INTPTR_FORMAT, cache()); |
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1836 st->print_cr(" - resolved_references: " INTPTR_FORMAT, resolved_references()); |
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1837 st->print_cr(" - reference_map: " INTPTR_FORMAT, reference_map()); |
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1838 |
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1839 for (int index = 1; index < length(); index++) { // Index 0 is unused |
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1840 ((ConstantPool*)this)->print_entry_on(index, st); |
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1841 switch (tag_at(index).value()) { |
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1842 case JVM_CONSTANT_Long : |
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1843 case JVM_CONSTANT_Double : |
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1844 index++; // Skip entry following eigth-byte constant |
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1845 } |
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1846 |
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1847 } |
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1848 st->cr(); |
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|
1849 } |
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1850 |
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1851 // Print one constant pool entry |
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1852 void ConstantPool::print_entry_on(const int index, outputStream* st) { |
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1853 EXCEPTION_MARK; |
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1854 st->print(" - %3d : ", index); |
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1855 tag_at(index).print_on(st); |
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1856 st->print(" : "); |
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1857 switch (tag_at(index).value()) { |
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1858 case JVM_CONSTANT_Class : |
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1859 { Klass* k = klass_at(index, CATCH); |
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1860 k->print_value_on(st); |
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1861 st->print(" {0x%lx}", (address)k); |
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|
1862 } |
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|
1863 break; |
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1864 case JVM_CONSTANT_Fieldref : |
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1865 case JVM_CONSTANT_Methodref : |
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1866 case JVM_CONSTANT_InterfaceMethodref : |
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1867 st->print("klass_index=%d", uncached_klass_ref_index_at(index)); |
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1868 st->print(" name_and_type_index=%d", uncached_name_and_type_ref_index_at(index)); |
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1869 break; |
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1870 case JVM_CONSTANT_String : |
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1871 unresolved_string_at(index)->print_value_on(st); |
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1872 break; |
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1873 case JVM_CONSTANT_Object : { |
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1874 oop anObj = object_at(index); |
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1875 anObj->print_value_on(st); |
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1876 st->print(" {0x%lx}", (address)anObj); |
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1877 } break; |
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1878 case JVM_CONSTANT_Integer : |
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1879 st->print("%d", int_at(index)); |
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1880 break; |
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1881 case JVM_CONSTANT_Float : |
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1882 st->print("%f", float_at(index)); |
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1883 break; |
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1884 case JVM_CONSTANT_Long : |
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1885 st->print_jlong(long_at(index)); |
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|
1886 break; |
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1887 case JVM_CONSTANT_Double : |
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1888 st->print("%lf", double_at(index)); |
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|
1889 break; |
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1890 case JVM_CONSTANT_NameAndType : |
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1891 st->print("name_index=%d", name_ref_index_at(index)); |
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1892 st->print(" signature_index=%d", signature_ref_index_at(index)); |
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|
1893 break; |
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1894 case JVM_CONSTANT_Utf8 : |
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1895 symbol_at(index)->print_value_on(st); |
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|
1896 break; |
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1897 case JVM_CONSTANT_UnresolvedClass : // fall-through |
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1898 case JVM_CONSTANT_UnresolvedClassInError: { |
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1899 // unresolved_klass_at requires lock or safe world. |
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1900 CPSlot entry = slot_at(index); |
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1901 if (entry.is_resolved()) { |
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1902 entry.get_klass()->print_value_on(st); |
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1903 } else { |
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|
1904 entry.get_symbol()->print_value_on(st); |
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1905 } |
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|
1906 } |
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|
1907 break; |
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1908 case JVM_CONSTANT_MethodHandle : |
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1909 case JVM_CONSTANT_MethodHandleInError : |
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1910 st->print("ref_kind=%d", method_handle_ref_kind_at(index)); |
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1911 st->print(" ref_index=%d", method_handle_index_at(index)); |
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1912 break; |
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1913 case JVM_CONSTANT_MethodType : |
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1914 case JVM_CONSTANT_MethodTypeInError : |
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1915 st->print("signature_index=%d", method_type_index_at(index)); |
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1916 break; |
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1917 case JVM_CONSTANT_InvokeDynamic : |
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1918 { |
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1919 st->print("bootstrap_method_index=%d", invoke_dynamic_bootstrap_method_ref_index_at(index)); |
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1920 st->print(" name_and_type_index=%d", invoke_dynamic_name_and_type_ref_index_at(index)); |
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1921 int argc = invoke_dynamic_argument_count_at(index); |
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1922 if (argc > 0) { |
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1923 for (int arg_i = 0; arg_i < argc; arg_i++) { |
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1924 int arg = invoke_dynamic_argument_index_at(index, arg_i); |
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1925 st->print((arg_i == 0 ? " arguments={%d" : ", %d"), arg); |
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1926 } |
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1927 st->print("}"); |
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1928 } |
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1929 } |
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1930 break; |
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1931 default: |
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1932 ShouldNotReachHere(); |
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1933 break; |
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1934 } |
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1935 st->cr(); |
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1936 } |
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1937 |
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1938 void ConstantPool::print_value_on(outputStream* st) const { |
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1939 assert(is_constantPool(), "must be constantPool"); |
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1940 st->print("constant pool [%d]", length()); |
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1941 if (has_pseudo_string()) st->print("/pseudo_string"); |
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1942 if (has_invokedynamic()) st->print("/invokedynamic"); |
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1943 if (has_preresolution()) st->print("/preresolution"); |
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1944 if (operands() != NULL) st->print("/operands[%d]", operands()->length()); |
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1945 print_address_on(st); |
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1946 st->print(" for "); |
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1947 pool_holder()->print_value_on(st); |
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1948 if (pool_holder() != NULL) { |
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1949 bool extra = (pool_holder()->constants() != this); |
6725
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1950 if (extra) st->print(" (extra)"); |
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1951 } |
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1952 if (cache() != NULL) { |
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1953 st->print(" cache=" PTR_FORMAT, cache()); |
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1954 } |
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1955 } |
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1956 |
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1957 |
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1958 // Verification |
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1959 |
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1960 void ConstantPool::verify_on(outputStream* st) { |
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1961 guarantee(is_constantPool(), "object must be constant pool"); |
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1962 for (int i = 0; i< length(); i++) { |
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1963 constantTag tag = tag_at(i); |
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1964 CPSlot entry = slot_at(i); |
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1965 if (tag.is_klass()) { |
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1966 if (entry.is_resolved()) { |
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1967 guarantee(entry.get_klass()->is_metadata(), "should be metadata"); |
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1968 guarantee(entry.get_klass()->is_klass(), "should be klass"); |
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1969 } |
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1970 } else if (tag.is_unresolved_klass()) { |
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1971 if (entry.is_resolved()) { |
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1972 guarantee(entry.get_klass()->is_metadata(), "should be metadata"); |
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1973 guarantee(entry.get_klass()->is_klass(), "should be klass"); |
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1974 } |
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1975 } else if (tag.is_symbol()) { |
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1976 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count"); |
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1977 } else if (tag.is_string()) { |
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1978 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count"); |
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1979 } |
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1980 } |
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1981 if (cache() != NULL) { |
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1982 // Note: cache() can be NULL before a class is completely setup or |
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1983 // in temporary constant pools used during constant pool merging |
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1984 guarantee(cache()->is_metadata(), "should be metadata"); |
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1985 guarantee(cache()->is_constantPoolCache(), "should be constant pool cache"); |
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1986 } |
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1987 if (pool_holder() != NULL) { |
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1988 // Note: pool_holder() can be NULL in temporary constant pools |
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1989 // used during constant pool merging |
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1990 guarantee(pool_holder()->is_metadata(), "should be metadata"); |
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1991 guarantee(pool_holder()->is_klass(), "should be klass"); |
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1992 } |
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1993 } |
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1994 |
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1995 |
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1996 void SymbolHashMap::add_entry(Symbol* sym, u2 value) { |
0 | 1997 char *str = sym->as_utf8(); |
1998 unsigned int hash = compute_hash(str, sym->utf8_length()); | |
1999 unsigned int index = hash % table_size(); | |
2000 | |
2001 // check if already in map | |
2002 // we prefer the first entry since it is more likely to be what was used in | |
2003 // the class file | |
2004 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
2005 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
2006 if (en->hash() == hash && en->symbol() == sym) { | |
2007 return; // already there | |
2008 } | |
2009 } | |
2010 | |
2011 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); | |
2012 entry->set_next(bucket(index)); | |
2013 _buckets[index].set_entry(entry); | |
2014 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
2015 } | |
2016 | |
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2017 SymbolHashMapEntry* SymbolHashMap::find_entry(Symbol* sym) { |
0 | 2018 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); |
2019 char *str = sym->as_utf8(); | |
2020 int len = sym->utf8_length(); | |
2021 unsigned int hash = SymbolHashMap::compute_hash(str, len); | |
2022 unsigned int index = hash % table_size(); | |
2023 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
2024 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
2025 if (en->hash() == hash && en->symbol() == sym) { | |
2026 return en; | |
2027 } | |
2028 } | |
2029 return NULL; | |
2030 } |