Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/constantPool.cpp @ 6791:8d3cc6612bd1
7197033: missing ResourceMark for assert in Method::bci_from()
Summary: Added missing ResourceMark.
Reviewed-by: dholmes, coleenp, jmasa
author | kvn |
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date | Mon, 17 Sep 2012 17:02:10 -0700 |
parents | fa6e618671d7 |
children | f6b0eb4e44cf d8ce2825b193 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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_orig_length(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, InstanceKlass::cast(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 | |
250 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
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 = InstanceKlass::cast(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 InstanceKlass::cast(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 InstanceKlass::cast(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 = InstanceKlass::cast(this_oop->pool_holder())->class_loader_data(); |
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343 if (!this_key->is_the_null_class_loader_data()) { |
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344 this_key->record_dependency(k(), CHECK_NULL); // Can throw OOM |
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345 } |
0 | 346 this_oop->klass_at_put(which, k()); |
347 } | |
348 } | |
349 } | |
350 | |
351 entry = this_oop->resolved_klass_at(which); | |
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352 assert(entry.is_resolved() && entry.get_klass()->is_klass(), "must be resolved at this point"); |
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353 return entry.get_klass(); |
0 | 354 } |
355 | |
356 | |
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357 // Does not update ConstantPool* - to avoid any exception throwing. Used |
0 | 358 // by compiler and exception handling. Also used to avoid classloads for |
359 // instanceof operations. Returns NULL if the class has not been loaded or | |
360 // if the verification of constant pool failed | |
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361 Klass* ConstantPool::klass_at_if_loaded(constantPoolHandle this_oop, int which) { |
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362 CPSlot entry = this_oop->slot_at(which); |
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363 if (entry.is_resolved()) { |
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364 assert(entry.get_klass()->is_klass(), "must be"); |
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365 return entry.get_klass(); |
0 | 366 } else { |
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367 assert(entry.is_unresolved(), "must be either symbol or klass"); |
0 | 368 Thread *thread = Thread::current(); |
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369 Symbol* name = entry.get_symbol(); |
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370 oop loader = InstanceKlass::cast(this_oop->pool_holder())->class_loader(); |
0 | 371 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); |
372 Handle h_prot (thread, protection_domain); | |
373 Handle h_loader (thread, loader); | |
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374 Klass* k = SystemDictionary::find(name, h_loader, h_prot, thread); |
0 | 375 |
376 if (k != NULL) { | |
377 // Make sure that resolving is legal | |
378 EXCEPTION_MARK; | |
379 KlassHandle klass(THREAD, k); | |
380 // return NULL if verification fails | |
381 verify_constant_pool_resolve(this_oop, klass, THREAD); | |
382 if (HAS_PENDING_EXCEPTION) { | |
383 CLEAR_PENDING_EXCEPTION; | |
384 return NULL; | |
385 } | |
386 return klass(); | |
387 } else { | |
388 return k; | |
389 } | |
390 } | |
391 } | |
392 | |
393 | |
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394 Klass* ConstantPool::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) { |
0 | 395 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which)); |
396 } | |
397 | |
398 | |
399 // This is an interface for the compiler that allows accessing non-resolved entries | |
400 // in the constant pool - but still performs the validations tests. Must be used | |
401 // in a pre-parse of the compiler - to determine what it can do and not do. | |
402 // Note: We cannot update the ConstantPool from the vm_thread. | |
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403 Klass* ConstantPool::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) { |
0 | 404 int which = this_oop->klass_ref_index_at(index); |
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405 CPSlot entry = this_oop->slot_at(which); |
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406 if (entry.is_resolved()) { |
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407 assert(entry.get_klass()->is_klass(), "must be"); |
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408 return entry.get_klass(); |
0 | 409 } else { |
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410 assert(entry.is_unresolved(), "must be either symbol or klass"); |
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411 Symbol* name = entry.get_symbol(); |
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412 oop loader = InstanceKlass::cast(this_oop->pool_holder())->class_loader(); |
0 | 413 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); |
414 Handle h_loader(THREAD, loader); | |
415 Handle h_prot (THREAD, protection_domain); | |
416 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD)); | |
417 | |
418 // Do access check for klasses | |
419 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL); | |
420 return k(); | |
421 } | |
422 } | |
423 | |
424 | |
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425 Method* ConstantPool::method_at_if_loaded(constantPoolHandle cpool, |
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426 int which) { |
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427 if (cpool->cache() == NULL) return NULL; // nothing to load yet |
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428 int cache_index = decode_cpcache_index(which, true); |
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429 if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) { |
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430 // FIXME: should be an assert |
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431 if (PrintMiscellaneous && (Verbose||WizardMode)) { |
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432 tty->print_cr("bad operand %d in:", which); cpool->print(); |
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433 } |
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434 return NULL; |
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435 } |
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436 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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437 return e->method_if_resolved(cpool); |
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438 } |
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439 |
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440 |
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441 bool ConstantPool::has_appendix_at_if_loaded(constantPoolHandle cpool, int which) { |
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442 if (cpool->cache() == NULL) return false; // nothing to load yet |
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443 int cache_index = decode_cpcache_index(which, true); |
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444 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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445 return e->has_appendix(); |
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446 } |
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447 |
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448 |
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449 oop ConstantPool::appendix_at_if_loaded(constantPoolHandle cpool, int which) { |
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450 if (cpool->cache() == NULL) return NULL; // nothing to load yet |
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451 int cache_index = decode_cpcache_index(which, true); |
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452 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
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453 return e->appendix_if_resolved(cpool); |
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454 } |
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455 |
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456 |
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457 Symbol* ConstantPool::impl_name_ref_at(int which, bool uncached) { |
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458 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
0 | 459 return symbol_at(name_index); |
460 } | |
461 | |
462 | |
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463 Symbol* ConstantPool::impl_signature_ref_at(int which, bool uncached) { |
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464 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
0 | 465 return symbol_at(signature_index); |
466 } | |
467 | |
468 | |
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469 int ConstantPool::impl_name_and_type_ref_index_at(int which, bool uncached) { |
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470 int i = which; |
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471 if (!uncached && cache() != NULL) { |
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472 if (ConstantPool::is_invokedynamic_index(which)) { |
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473 // Invokedynamic index is index into resolved_references |
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474 int pool_index = invokedynamic_cp_cache_entry_at(which)->constant_pool_index(); |
2460 | 475 pool_index = invoke_dynamic_name_and_type_ref_index_at(pool_index); |
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476 assert(tag_at(pool_index).is_name_and_type(), ""); |
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477 return pool_index; |
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478 } |
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479 // change byte-ordering and go via cache |
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480 i = remap_instruction_operand_from_cache(which); |
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481 } else { |
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482 if (tag_at(which).is_invoke_dynamic()) { |
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483 int pool_index = invoke_dynamic_name_and_type_ref_index_at(which); |
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484 assert(tag_at(pool_index).is_name_and_type(), ""); |
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485 return pool_index; |
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486 } |
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487 } |
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488 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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489 assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above"); |
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490 jint ref_index = *int_at_addr(i); |
0 | 491 return extract_high_short_from_int(ref_index); |
492 } | |
493 | |
494 | |
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495 int ConstantPool::impl_klass_ref_index_at(int which, bool uncached) { |
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496 guarantee(!ConstantPool::is_invokedynamic_index(which), |
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497 "an invokedynamic instruction does not have a klass"); |
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498 int i = which; |
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499 if (!uncached && cache() != NULL) { |
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500 // change byte-ordering and go via cache |
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501 i = remap_instruction_operand_from_cache(which); |
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502 } |
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503 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
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504 jint ref_index = *int_at_addr(i); |
0 | 505 return extract_low_short_from_int(ref_index); |
506 } | |
507 | |
508 | |
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509 |
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510 int ConstantPool::remap_instruction_operand_from_cache(int operand) { |
1565 | 511 int cpc_index = operand; |
512 DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG); | |
513 assert((int)(u2)cpc_index == cpc_index, "clean u2"); | |
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514 int member_index = cache()->entry_at(cpc_index)->constant_pool_index(); |
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515 return member_index; |
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516 } |
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517 |
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518 |
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519 void ConstantPool::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { |
0 | 520 if (k->oop_is_instance() || k->oop_is_objArray()) { |
521 instanceKlassHandle holder (THREAD, this_oop->pool_holder()); | |
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522 Klass* elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass(); |
0 | 523 KlassHandle element (THREAD, elem_oop); |
524 | |
525 // The element type could be a typeArray - we only need the access check if it is | |
526 // an reference to another class | |
527 if (element->oop_is_instance()) { | |
528 LinkResolver::check_klass_accessability(holder, element, CHECK); | |
529 } | |
530 } | |
531 } | |
532 | |
533 | |
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534 int ConstantPool::name_ref_index_at(int which_nt) { |
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535 jint ref_index = name_and_type_at(which_nt); |
0 | 536 return extract_low_short_from_int(ref_index); |
537 } | |
538 | |
539 | |
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540 int ConstantPool::signature_ref_index_at(int which_nt) { |
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541 jint ref_index = name_and_type_at(which_nt); |
0 | 542 return extract_high_short_from_int(ref_index); |
543 } | |
544 | |
545 | |
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546 Klass* ConstantPool::klass_ref_at(int which, TRAPS) { |
0 | 547 return klass_at(klass_ref_index_at(which), CHECK_NULL); |
548 } | |
549 | |
550 | |
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551 Symbol* ConstantPool::klass_name_at(int which) { |
0 | 552 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), |
553 "Corrupted constant pool"); | |
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554 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*. |
0 | 555 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and |
556 // tag is not updated atomicly. | |
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557 CPSlot entry = slot_at(which); |
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558 if (entry.is_resolved()) { |
0 | 559 // Already resolved - return entry's name. |
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560 assert(entry.get_klass()->is_klass(), "must be"); |
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561 return entry.get_klass()->name(); |
0 | 562 } else { |
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563 assert(entry.is_unresolved(), "must be either symbol or klass"); |
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564 return entry.get_symbol(); |
0 | 565 } |
566 } | |
567 | |
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568 Symbol* ConstantPool::klass_ref_at_noresolve(int which) { |
0 | 569 jint ref_index = klass_ref_index_at(which); |
570 return klass_at_noresolve(ref_index); | |
571 } | |
572 | |
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573 Symbol* ConstantPool::uncached_klass_ref_at_noresolve(int which) { |
1602 | 574 jint ref_index = uncached_klass_ref_index_at(which); |
575 return klass_at_noresolve(ref_index); | |
576 } | |
577 | |
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578 char* ConstantPool::string_at_noresolve(int which) { |
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579 Symbol* s = unresolved_string_at(which); |
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580 if (s == NULL) { |
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581 return (char*)"<pseudo-string>"; |
0 | 582 } else { |
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583 return unresolved_string_at(which)->as_C_string(); |
0 | 584 } |
585 } | |
586 | |
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587 BasicType ConstantPool::basic_type_for_signature_at(int which) { |
0 | 588 return FieldType::basic_type(symbol_at(which)); |
589 } | |
590 | |
591 | |
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592 void ConstantPool::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { |
0 | 593 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused |
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594 if (this_oop->tag_at(index).is_string()) { |
0 | 595 this_oop->string_at(index, CHECK); |
596 } | |
597 } | |
598 } | |
599 | |
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600 // Resolve all the classes in the constant pool. If they are all resolved, |
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601 // the constant pool is read-only. Enhancement: allocate cp entries to |
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602 // another metaspace, and copy to read-only or read-write space if this |
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603 // bit is set. |
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604 bool ConstantPool::resolve_class_constants(TRAPS) { |
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605 constantPoolHandle cp(THREAD, this); |
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606 for (int index = 1; index < length(); index++) { // Index 0 is unused |
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607 if (tag_at(index).is_unresolved_klass() && |
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608 klass_at_if_loaded(cp, index) == NULL) { |
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609 return false; |
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610 } |
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611 } |
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612 // set_preresolution(); or some bit for future use |
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613 return true; |
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614 } |
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615 |
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616 // If resolution for MethodHandle or MethodType fails, save the exception |
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617 // in the resolution error table, so that the same exception is thrown again. |
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618 void ConstantPool::save_and_throw_exception(constantPoolHandle this_oop, int which, |
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619 int tag, TRAPS) { |
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620 ResourceMark rm; |
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621 Symbol* error = PENDING_EXCEPTION->klass()->name(); |
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622 MonitorLockerEx ml(this_oop->lock()); // lock cpool to change tag. |
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623 |
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624 int error_tag = (tag == JVM_CONSTANT_MethodHandle) ? |
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625 JVM_CONSTANT_MethodHandleInError : JVM_CONSTANT_MethodTypeInError; |
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626 |
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627 if (!PENDING_EXCEPTION-> |
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628 is_a(SystemDictionary::LinkageError_klass())) { |
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629 // Just throw the exception and don't prevent these classes from |
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630 // being loaded due to virtual machine errors like StackOverflow |
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631 // and OutOfMemoryError, etc, or if the thread was hit by stop() |
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632 // Needs clarification to section 5.4.3 of the VM spec (see 6308271) |
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633 |
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634 } else if (this_oop->tag_at(which).value() != error_tag) { |
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635 SystemDictionary::add_resolution_error(this_oop, which, error); |
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636 this_oop->tag_at_put(which, error_tag); |
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637 } else { |
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638 // some other thread has put the class in error state. |
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639 error = SystemDictionary::find_resolution_error(this_oop, which); |
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640 assert(error != NULL, "checking"); |
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641 CLEAR_PENDING_EXCEPTION; |
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642 THROW_MSG(error, ""); |
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643 } |
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644 } |
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645 |
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646 |
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647 // Called to resolve constants in the constant pool and return an oop. |
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648 // Some constant pool entries cache their resolved oop. This is also |
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649 // called to create oops from constants to use in arguments for invokedynamic |
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650 oop ConstantPool::resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS) { |
1602 | 651 oop result_oop = NULL; |
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652 Handle throw_exception; |
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653 |
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654 if (cache_index == _possible_index_sentinel) { |
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655 // It is possible that this constant is one which is cached in the objects. |
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656 // We'll do a linear search. This should be OK because this usage is rare. |
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657 assert(index > 0, "valid index"); |
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658 cache_index = this_oop->cp_to_object_index(index); |
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659 } |
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660 assert(cache_index == _no_index_sentinel || cache_index >= 0, ""); |
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661 assert(index == _no_index_sentinel || index >= 0, ""); |
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662 |
1602 | 663 if (cache_index >= 0) { |
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664 result_oop = this_oop->resolved_references()->obj_at(cache_index); |
1602 | 665 if (result_oop != NULL) { |
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666 return result_oop; |
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667 // That was easy... |
1602 | 668 } |
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669 index = this_oop->object_to_cp_index(cache_index); |
1602 | 670 } |
671 | |
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672 jvalue prim_value; // temp used only in a few cases below |
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673 |
1602 | 674 int tag_value = this_oop->tag_at(index).value(); |
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675 |
1602 | 676 switch (tag_value) { |
677 | |
678 case JVM_CONSTANT_UnresolvedClass: | |
679 case JVM_CONSTANT_UnresolvedClassInError: | |
680 case JVM_CONSTANT_Class: | |
681 { | |
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682 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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683 Klass* resolved = klass_at_impl(this_oop, index, CHECK_NULL); |
1602 | 684 // ldc wants the java mirror. |
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685 result_oop = resolved->java_mirror(); |
1602 | 686 break; |
687 } | |
688 | |
689 case JVM_CONSTANT_String: | |
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690 assert(cache_index != _no_index_sentinel, "should have been set"); |
1602 | 691 if (this_oop->is_pseudo_string_at(index)) { |
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692 result_oop = this_oop->pseudo_string_at(index, cache_index); |
1602 | 693 break; |
694 } | |
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695 result_oop = string_at_impl(this_oop, index, cache_index, CHECK_NULL); |
1602 | 696 break; |
697 | |
698 case JVM_CONSTANT_Object: | |
699 result_oop = this_oop->object_at(index); | |
700 break; | |
701 | |
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702 case JVM_CONSTANT_MethodHandleInError: |
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703 case JVM_CONSTANT_MethodTypeInError: |
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704 { |
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705 Symbol* error = SystemDictionary::find_resolution_error(this_oop, index); |
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706 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table"); |
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707 ResourceMark rm; |
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708 THROW_MSG_0(error, ""); |
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709 break; |
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710 } |
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711 |
1602 | 712 case JVM_CONSTANT_MethodHandle: |
713 { | |
714 int ref_kind = this_oop->method_handle_ref_kind_at(index); | |
715 int callee_index = this_oop->method_handle_klass_index_at(index); | |
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716 Symbol* name = this_oop->method_handle_name_ref_at(index); |
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717 Symbol* signature = this_oop->method_handle_signature_ref_at(index); |
1602 | 718 if (PrintMiscellaneous) |
719 tty->print_cr("resolve JVM_CONSTANT_MethodHandle:%d [%d/%d/%d] %s.%s", | |
720 ref_kind, index, this_oop->method_handle_index_at(index), | |
721 callee_index, name->as_C_string(), signature->as_C_string()); | |
722 KlassHandle callee; | |
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723 { Klass* k = klass_at_impl(this_oop, callee_index, CHECK_NULL); |
1602 | 724 callee = KlassHandle(THREAD, k); |
725 } | |
726 KlassHandle klass(THREAD, this_oop->pool_holder()); | |
727 Handle value = SystemDictionary::link_method_handle_constant(klass, ref_kind, | |
728 callee, name, signature, | |
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729 THREAD); |
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730 result_oop = value(); |
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731 if (HAS_PENDING_EXCEPTION) { |
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732 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL); |
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733 } |
1602 | 734 break; |
735 } | |
736 | |
737 case JVM_CONSTANT_MethodType: | |
738 { | |
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739 Symbol* signature = this_oop->method_type_signature_at(index); |
1602 | 740 if (PrintMiscellaneous) |
741 tty->print_cr("resolve JVM_CONSTANT_MethodType [%d/%d] %s", | |
742 index, this_oop->method_type_index_at(index), | |
743 signature->as_C_string()); | |
744 KlassHandle klass(THREAD, this_oop->pool_holder()); | |
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745 Handle value = SystemDictionary::find_method_handle_type(signature, klass, THREAD); |
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746 result_oop = value(); |
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747 if (HAS_PENDING_EXCEPTION) { |
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748 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL); |
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749 } |
1602 | 750 break; |
751 } | |
752 | |
753 case JVM_CONSTANT_Integer: | |
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754 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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755 prim_value.i = this_oop->int_at(index); |
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756 result_oop = java_lang_boxing_object::create(T_INT, &prim_value, CHECK_NULL); |
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757 break; |
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758 |
1602 | 759 case JVM_CONSTANT_Float: |
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760 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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761 prim_value.f = this_oop->float_at(index); |
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762 result_oop = java_lang_boxing_object::create(T_FLOAT, &prim_value, CHECK_NULL); |
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763 break; |
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764 |
1602 | 765 case JVM_CONSTANT_Long: |
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766 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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767 prim_value.j = this_oop->long_at(index); |
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768 result_oop = java_lang_boxing_object::create(T_LONG, &prim_value, CHECK_NULL); |
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769 break; |
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770 |
1602 | 771 case JVM_CONSTANT_Double: |
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772 assert(cache_index == _no_index_sentinel, "should not have been set"); |
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773 prim_value.d = this_oop->double_at(index); |
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774 result_oop = java_lang_boxing_object::create(T_DOUBLE, &prim_value, CHECK_NULL); |
1602 | 775 break; |
776 | |
777 default: | |
778 DEBUG_ONLY( tty->print_cr("*** %p: tag at CP[%d/%d] = %d", | |
779 this_oop(), index, cache_index, tag_value) ); | |
780 assert(false, "unexpected constant tag"); | |
781 break; | |
782 } | |
783 | |
784 if (cache_index >= 0) { | |
785 // Cache the oop here also. | |
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786 Handle result_handle(THREAD, result_oop); |
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787 MonitorLockerEx ml(this_oop->lock()); // don't know if we really need this |
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788 oop result = this_oop->resolved_references()->obj_at(cache_index); |
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789 // Benign race condition: resolved_references may already be filled in while we were trying to lock. |
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790 // The important thing here is that all threads pick up the same result. |
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791 // It doesn't matter which racing thread wins, as long as only one |
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792 // result is used by all threads, and all future queries. |
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793 // That result may be either a resolved constant or a failure exception. |
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794 if (result == NULL) { |
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795 this_oop->resolved_references()->obj_at_put(cache_index, result_handle()); |
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796 return result_handle(); |
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797 } else { |
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798 // Return the winning thread's result. This can be different than |
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799 // result_handle() for MethodHandles. |
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800 return result; |
1602 | 801 } |
802 } else { | |
803 return result_oop; | |
804 } | |
805 } | |
806 | |
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807 oop ConstantPool::uncached_string_at(int which, TRAPS) { |
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808 Symbol* sym = unresolved_string_at(which); |
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809 oop str = StringTable::intern(sym, CHECK_(NULL)); |
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810 assert(java_lang_String::is_instance(str), "must be string"); |
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811 return str; |
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812 } |
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813 |
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814 |
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815 oop ConstantPool::resolve_bootstrap_specifier_at_impl(constantPoolHandle this_oop, int index, TRAPS) { |
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816 assert(this_oop->tag_at(index).is_invoke_dynamic(), "Corrupted constant pool"); |
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817 |
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818 Handle bsm; |
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819 int argc; |
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820 { |
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821 // JVM_CONSTANT_InvokeDynamic is an ordered pair of [bootm, name&type], plus optional arguments |
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822 // The bootm, being a JVM_CONSTANT_MethodHandle, has its own cache entry. |
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823 // It is accompanied by the optional arguments. |
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824 int bsm_index = this_oop->invoke_dynamic_bootstrap_method_ref_index_at(index); |
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825 oop bsm_oop = this_oop->resolve_possibly_cached_constant_at(bsm_index, CHECK_NULL); |
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826 if (!java_lang_invoke_MethodHandle::is_instance(bsm_oop)) { |
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827 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "BSM not an MethodHandle"); |
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828 } |
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829 |
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830 // Extract the optional static arguments. |
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831 argc = this_oop->invoke_dynamic_argument_count_at(index); |
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832 if (argc == 0) return bsm_oop; |
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833 |
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834 bsm = Handle(THREAD, bsm_oop); |
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835 } |
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836 |
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837 objArrayHandle info; |
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838 { |
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839 objArrayOop info_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), 1+argc, CHECK_NULL); |
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840 info = objArrayHandle(THREAD, info_oop); |
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841 } |
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842 |
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843 info->obj_at_put(0, bsm()); |
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844 for (int i = 0; i < argc; i++) { |
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845 int arg_index = this_oop->invoke_dynamic_argument_index_at(index, i); |
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846 oop arg_oop = this_oop->resolve_possibly_cached_constant_at(arg_index, CHECK_NULL); |
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847 info->obj_at_put(1+i, arg_oop); |
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848 } |
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849 |
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850 return info(); |
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851 } |
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852 |
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853 oop ConstantPool::string_at_impl(constantPoolHandle this_oop, int which, int obj_index, TRAPS) { |
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854 // If the string has already been interned, this entry will be non-null |
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855 oop str = this_oop->resolved_references()->obj_at(obj_index); |
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856 if (str != NULL) return str; |
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857 |
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858 Symbol* sym = this_oop->unresolved_string_at(which); |
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859 str = StringTable::intern(sym, CHECK_(NULL)); |
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860 this_oop->string_at_put(which, obj_index, str); |
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861 assert(java_lang_String::is_instance(str), "must be string"); |
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862 return str; |
0 | 863 } |
864 | |
865 | |
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866 bool ConstantPool::klass_name_at_matches(instanceKlassHandle k, |
0 | 867 int which) { |
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868 // Names are interned, so we can compare Symbol*s directly |
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869 Symbol* cp_name = klass_name_at(which); |
0 | 870 return (cp_name == k->name()); |
871 } | |
872 | |
873 | |
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874 // Iterate over symbols and decrement ones which are Symbol*s. |
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875 // This is done during GC so do not need to lock constantPool unless we |
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876 // have per-thread safepoints. |
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877 // Only decrement the UTF8 symbols. Unresolved classes and strings point to |
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878 // these symbols but didn't increment the reference count. |
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879 void ConstantPool::unreference_symbols() { |
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880 for (int index = 1; index < length(); index++) { // Index 0 is unused |
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881 constantTag tag = tag_at(index); |
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882 if (tag.is_symbol()) { |
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883 symbol_at(index)->decrement_refcount(); |
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884 } |
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885 } |
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886 } |
0 | 887 |
888 | |
889 // Compare this constant pool's entry at index1 to the constant pool | |
890 // cp2's entry at index2. | |
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891 bool ConstantPool::compare_entry_to(int index1, constantPoolHandle cp2, |
0 | 892 int index2, TRAPS) { |
893 | |
894 jbyte t1 = tag_at(index1).value(); | |
895 jbyte t2 = cp2->tag_at(index2).value(); | |
896 | |
897 | |
898 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass | |
899 // when comparing | |
900 if (t1 == JVM_CONSTANT_UnresolvedClassInError) { | |
901 t1 = JVM_CONSTANT_UnresolvedClass; | |
902 } | |
903 if (t2 == JVM_CONSTANT_UnresolvedClassInError) { | |
904 t2 = JVM_CONSTANT_UnresolvedClass; | |
905 } | |
906 | |
907 if (t1 != t2) { | |
908 // Not the same entry type so there is nothing else to check. Note | |
909 // that this style of checking will consider resolved/unresolved | |
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910 // class pairs as different. |
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911 // From the ConstantPool* API point of view, this is correct |
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912 // behavior. See VM_RedefineClasses::merge_constant_pools() to see how this |
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913 // plays out in the context of ConstantPool* merging. |
0 | 914 return false; |
915 } | |
916 | |
917 switch (t1) { | |
918 case JVM_CONSTANT_Class: | |
919 { | |
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920 Klass* k1 = klass_at(index1, CHECK_false); |
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921 Klass* k2 = cp2->klass_at(index2, CHECK_false); |
0 | 922 if (k1 == k2) { |
923 return true; | |
924 } | |
925 } break; | |
926 | |
927 case JVM_CONSTANT_ClassIndex: | |
928 { | |
929 int recur1 = klass_index_at(index1); | |
930 int recur2 = cp2->klass_index_at(index2); | |
931 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
932 if (match) { | |
933 return true; | |
934 } | |
935 } break; | |
936 | |
937 case JVM_CONSTANT_Double: | |
938 { | |
939 jdouble d1 = double_at(index1); | |
940 jdouble d2 = cp2->double_at(index2); | |
941 if (d1 == d2) { | |
942 return true; | |
943 } | |
944 } break; | |
945 | |
946 case JVM_CONSTANT_Fieldref: | |
947 case JVM_CONSTANT_InterfaceMethodref: | |
948 case JVM_CONSTANT_Methodref: | |
949 { | |
950 int recur1 = uncached_klass_ref_index_at(index1); | |
951 int recur2 = cp2->uncached_klass_ref_index_at(index2); | |
952 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
953 if (match) { | |
954 recur1 = uncached_name_and_type_ref_index_at(index1); | |
955 recur2 = cp2->uncached_name_and_type_ref_index_at(index2); | |
956 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
957 if (match) { | |
958 return true; | |
959 } | |
960 } | |
961 } break; | |
962 | |
963 case JVM_CONSTANT_Float: | |
964 { | |
965 jfloat f1 = float_at(index1); | |
966 jfloat f2 = cp2->float_at(index2); | |
967 if (f1 == f2) { | |
968 return true; | |
969 } | |
970 } break; | |
971 | |
972 case JVM_CONSTANT_Integer: | |
973 { | |
974 jint i1 = int_at(index1); | |
975 jint i2 = cp2->int_at(index2); | |
976 if (i1 == i2) { | |
977 return true; | |
978 } | |
979 } break; | |
980 | |
981 case JVM_CONSTANT_Long: | |
982 { | |
983 jlong l1 = long_at(index1); | |
984 jlong l2 = cp2->long_at(index2); | |
985 if (l1 == l2) { | |
986 return true; | |
987 } | |
988 } break; | |
989 | |
990 case JVM_CONSTANT_NameAndType: | |
991 { | |
992 int recur1 = name_ref_index_at(index1); | |
993 int recur2 = cp2->name_ref_index_at(index2); | |
994 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
995 if (match) { | |
996 recur1 = signature_ref_index_at(index1); | |
997 recur2 = cp2->signature_ref_index_at(index2); | |
998 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
999 if (match) { | |
1000 return true; | |
1001 } | |
1002 } | |
1003 } break; | |
1004 | |
1005 case JVM_CONSTANT_StringIndex: | |
1006 { | |
1007 int recur1 = string_index_at(index1); | |
1008 int recur2 = cp2->string_index_at(index2); | |
1009 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
1010 if (match) { | |
1011 return true; | |
1012 } | |
1013 } break; | |
1014 | |
1015 case JVM_CONSTANT_UnresolvedClass: | |
1016 { | |
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1017 Symbol* k1 = unresolved_klass_at(index1); |
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1018 Symbol* k2 = cp2->unresolved_klass_at(index2); |
0 | 1019 if (k1 == k2) { |
1020 return true; | |
1021 } | |
1022 } break; | |
1023 | |
1602 | 1024 case JVM_CONSTANT_MethodType: |
1025 { | |
1026 int k1 = method_type_index_at(index1); | |
1027 int k2 = cp2->method_type_index_at(index2); | |
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1028 bool match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1029 if (match) { |
1602 | 1030 return true; |
1031 } | |
1032 } break; | |
1033 | |
1034 case JVM_CONSTANT_MethodHandle: | |
1035 { | |
1036 int k1 = method_handle_ref_kind_at(index1); | |
1037 int k2 = cp2->method_handle_ref_kind_at(index2); | |
1038 if (k1 == k2) { | |
1039 int i1 = method_handle_index_at(index1); | |
1040 int i2 = cp2->method_handle_index_at(index2); | |
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1041 bool match = compare_entry_to(i1, cp2, i2, CHECK_false); |
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1042 if (match) { |
1602 | 1043 return true; |
1044 } | |
1045 } | |
1046 } break; | |
1047 | |
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1048 case JVM_CONSTANT_InvokeDynamic: |
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1049 { |
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1050 int k1 = invoke_dynamic_bootstrap_method_ref_index_at(index1); |
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1051 int k2 = cp2->invoke_dynamic_bootstrap_method_ref_index_at(index2); |
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1052 bool match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1053 if (!match) return false; |
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1054 k1 = invoke_dynamic_name_and_type_ref_index_at(index1); |
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1055 k2 = cp2->invoke_dynamic_name_and_type_ref_index_at(index2); |
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1056 match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1057 if (!match) return false; |
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1058 int argc = invoke_dynamic_argument_count_at(index1); |
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1059 if (argc == cp2->invoke_dynamic_argument_count_at(index2)) { |
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1060 for (int j = 0; j < argc; j++) { |
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1061 k1 = invoke_dynamic_argument_index_at(index1, j); |
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1062 k2 = cp2->invoke_dynamic_argument_index_at(index2, j); |
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1063 match = compare_entry_to(k1, cp2, k2, CHECK_false); |
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1064 if (!match) return false; |
1913
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1065 } |
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1066 return true; // got through loop; all elements equal |
1660
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1067 } |
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1068 } break; |
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1069 |
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1070 case JVM_CONSTANT_String: |
0 | 1071 { |
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1072 Symbol* s1 = unresolved_string_at(index1); |
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1073 Symbol* s2 = cp2->unresolved_string_at(index2); |
0 | 1074 if (s1 == s2) { |
1075 return true; | |
1076 } | |
1077 } break; | |
1078 | |
1079 case JVM_CONSTANT_Utf8: | |
1080 { | |
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1081 Symbol* s1 = symbol_at(index1); |
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1082 Symbol* s2 = cp2->symbol_at(index2); |
0 | 1083 if (s1 == s2) { |
1084 return true; | |
1085 } | |
1086 } break; | |
1087 | |
1088 // Invalid is used as the tag for the second constant pool entry | |
1089 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
1090 // not be seen by itself. | |
1091 case JVM_CONSTANT_Invalid: // fall through | |
1092 | |
1093 default: | |
1094 ShouldNotReachHere(); | |
1095 break; | |
1096 } | |
1097 | |
1098 return false; | |
1099 } // end compare_entry_to() | |
1100 | |
1101 | |
1102 // Copy this constant pool's entries at start_i to end_i (inclusive) | |
1103 // to the constant pool to_cp's entries starting at to_i. A total of | |
1104 // (end_i - start_i) + 1 entries are copied. | |
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1105 void ConstantPool::copy_cp_to_impl(constantPoolHandle from_cp, int start_i, int end_i, |
0 | 1106 constantPoolHandle to_cp, int to_i, TRAPS) { |
1107 | |
1108 int dest_i = to_i; // leave original alone for debug purposes | |
1109 | |
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1110 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { |
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1111 copy_entry_to(from_cp, src_i, to_cp, dest_i, CHECK); |
1913
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1112 |
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1113 switch (from_cp->tag_at(src_i).value()) { |
0 | 1114 case JVM_CONSTANT_Double: |
1115 case JVM_CONSTANT_Long: | |
1116 // double and long take two constant pool entries | |
1117 src_i += 2; | |
1118 dest_i += 2; | |
1119 break; | |
1120 | |
1121 default: | |
1122 // all others take one constant pool entry | |
1123 src_i++; | |
1124 dest_i++; | |
1125 break; | |
1126 } | |
1127 } | |
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1128 |
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1129 int from_oplen = operand_array_length(from_cp->operands()); |
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1130 int old_oplen = operand_array_length(to_cp->operands()); |
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1131 if (from_oplen != 0) { |
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1132 // append my operands to the target's operands array |
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1133 if (old_oplen == 0) { |
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1134 to_cp->set_operands(from_cp->operands()); // reuse; do not merge |
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1135 } else { |
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1136 int old_len = to_cp->operands()->length(); |
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1137 int from_len = from_cp->operands()->length(); |
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1138 int old_off = old_oplen * sizeof(u2); |
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1139 int from_off = from_oplen * sizeof(u2); |
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1140 // Use the metaspace for the destination constant pool |
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1141 ClassLoaderData* loader_data = to_cp->pool_holder()->class_loader_data(); |
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1142 Array<u2>* new_operands = MetadataFactory::new_array<u2>(loader_data, old_len + from_len, CHECK); |
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1143 int fillp = 0, len = 0; |
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1144 // first part of dest |
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1145 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0), |
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1146 new_operands->adr_at(fillp), |
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1147 (len = old_off) * sizeof(u2)); |
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1148 fillp += len; |
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1149 // first part of src |
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1150 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0), |
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1151 new_operands->adr_at(fillp), |
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1152 (len = from_off) * sizeof(u2)); |
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1153 fillp += len; |
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1154 // second part of dest |
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1155 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(old_off), |
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1156 new_operands->adr_at(fillp), |
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1157 (len = old_len - old_off) * sizeof(u2)); |
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1158 fillp += len; |
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1159 // second part of src |
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1160 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(from_off), |
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1161 new_operands->adr_at(fillp), |
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1162 (len = from_len - from_off) * sizeof(u2)); |
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1163 fillp += len; |
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1164 assert(fillp == new_operands->length(), ""); |
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1165 |
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1166 // Adjust indexes in the first part of the copied operands array. |
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1167 for (int j = 0; j < from_oplen; j++) { |
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1168 int offset = operand_offset_at(new_operands, old_oplen + j); |
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1169 assert(offset == operand_offset_at(from_cp->operands(), j), "correct copy"); |
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1170 offset += old_len; // every new tuple is preceded by old_len extra u2's |
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1171 operand_offset_at_put(new_operands, old_oplen + j, offset); |
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1172 } |
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1173 |
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1174 // replace target operands array with combined array |
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1175 to_cp->set_operands(new_operands); |
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1176 } |
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1177 } |
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1178 |
0 | 1179 } // end copy_cp_to() |
1180 | |
1181 | |
1182 // Copy this constant pool's entry at from_i to the constant pool | |
1183 // to_cp's entry at to_i. | |
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1184 void ConstantPool::copy_entry_to(constantPoolHandle from_cp, int from_i, |
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1185 constantPoolHandle to_cp, int to_i, |
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1186 TRAPS) { |
0 | 1187 |
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1188 int tag = from_cp->tag_at(from_i).value(); |
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1189 switch (tag) { |
0 | 1190 case JVM_CONSTANT_Class: |
1191 { | |
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1192 Klass* k = from_cp->klass_at(from_i, CHECK); |
0 | 1193 to_cp->klass_at_put(to_i, k); |
1194 } break; | |
1195 | |
1196 case JVM_CONSTANT_ClassIndex: | |
1197 { | |
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1198 jint ki = from_cp->klass_index_at(from_i); |
0 | 1199 to_cp->klass_index_at_put(to_i, ki); |
1200 } break; | |
1201 | |
1202 case JVM_CONSTANT_Double: | |
1203 { | |
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1204 jdouble d = from_cp->double_at(from_i); |
0 | 1205 to_cp->double_at_put(to_i, d); |
1206 // double takes two constant pool entries so init second entry's tag | |
1207 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
1208 } break; | |
1209 | |
1210 case JVM_CONSTANT_Fieldref: | |
1211 { | |
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1212 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
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1213 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
0 | 1214 to_cp->field_at_put(to_i, class_index, name_and_type_index); |
1215 } break; | |
1216 | |
1217 case JVM_CONSTANT_Float: | |
1218 { | |
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1219 jfloat f = from_cp->float_at(from_i); |
0 | 1220 to_cp->float_at_put(to_i, f); |
1221 } break; | |
1222 | |
1223 case JVM_CONSTANT_Integer: | |
1224 { | |
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1225 jint i = from_cp->int_at(from_i); |
0 | 1226 to_cp->int_at_put(to_i, i); |
1227 } break; | |
1228 | |
1229 case JVM_CONSTANT_InterfaceMethodref: | |
1230 { | |
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1231 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
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1232 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
0 | 1233 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); |
1234 } break; | |
1235 | |
1236 case JVM_CONSTANT_Long: | |
1237 { | |
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1238 jlong l = from_cp->long_at(from_i); |
0 | 1239 to_cp->long_at_put(to_i, l); |
1240 // long takes two constant pool entries so init second entry's tag | |
1241 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
1242 } break; | |
1243 | |
1244 case JVM_CONSTANT_Methodref: | |
1245 { | |
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1246 int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
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1247 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
0 | 1248 to_cp->method_at_put(to_i, class_index, name_and_type_index); |
1249 } break; | |
1250 | |
1251 case JVM_CONSTANT_NameAndType: | |
1252 { | |
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1253 int name_ref_index = from_cp->name_ref_index_at(from_i); |
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1254 int signature_ref_index = from_cp->signature_ref_index_at(from_i); |
0 | 1255 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); |
1256 } break; | |
1257 | |
1258 case JVM_CONSTANT_StringIndex: | |
1259 { | |
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1260 jint si = from_cp->string_index_at(from_i); |
0 | 1261 to_cp->string_index_at_put(to_i, si); |
1262 } break; | |
1263 | |
1264 case JVM_CONSTANT_UnresolvedClass: | |
1265 { | |
2332
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1266 // Can be resolved after checking tag, so check the slot first. |
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1267 CPSlot entry = from_cp->slot_at(from_i); |
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1268 if (entry.is_resolved()) { |
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1269 assert(entry.get_klass()->is_klass(), "must be"); |
2332
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1270 // Already resolved |
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1271 to_cp->klass_at_put(to_i, entry.get_klass()); |
2332
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1272 } else { |
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1273 to_cp->unresolved_klass_at_put(to_i, entry.get_symbol()); |
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1274 } |
0 | 1275 } break; |
1276 | |
1277 case JVM_CONSTANT_UnresolvedClassInError: | |
1278 { | |
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1279 Symbol* k = from_cp->unresolved_klass_at(from_i); |
0 | 1280 to_cp->unresolved_klass_at_put(to_i, k); |
1281 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); | |
1282 } break; | |
1283 | |
1284 | |
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1285 case JVM_CONSTANT_String: |
0 | 1286 { |
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1287 Symbol* s = from_cp->unresolved_string_at(from_i); |
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1288 to_cp->unresolved_string_at_put(to_i, s); |
0 | 1289 } break; |
1290 | |
1291 case JVM_CONSTANT_Utf8: | |
1292 { | |
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1293 Symbol* s = from_cp->symbol_at(from_i); |
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1294 // Need to increase refcount, the old one will be thrown away and deferenced |
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1295 s->increment_refcount(); |
0 | 1296 to_cp->symbol_at_put(to_i, s); |
1297 } break; | |
1298 | |
1602 | 1299 case JVM_CONSTANT_MethodType: |
1300 { | |
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1301 jint k = from_cp->method_type_index_at(from_i); |
1602 | 1302 to_cp->method_type_index_at_put(to_i, k); |
1303 } break; | |
1304 | |
1305 case JVM_CONSTANT_MethodHandle: | |
1306 { | |
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1307 int k1 = from_cp->method_handle_ref_kind_at(from_i); |
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1308 int k2 = from_cp->method_handle_index_at(from_i); |
1602 | 1309 to_cp->method_handle_index_at_put(to_i, k1, k2); |
1310 } break; | |
1311 | |
1660
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1312 case JVM_CONSTANT_InvokeDynamic: |
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1313 { |
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1314 int k1 = from_cp->invoke_dynamic_bootstrap_specifier_index(from_i); |
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1315 int k2 = from_cp->invoke_dynamic_name_and_type_ref_index_at(from_i); |
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1316 k1 += operand_array_length(to_cp->operands()); // to_cp might already have operands |
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1317 to_cp->invoke_dynamic_at_put(to_i, k1, k2); |
1660
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1318 } break; |
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1319 |
0 | 1320 // Invalid is used as the tag for the second constant pool entry |
1321 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
1322 // not be seen by itself. | |
1323 case JVM_CONSTANT_Invalid: // fall through | |
1324 | |
1325 default: | |
1326 { | |
1327 ShouldNotReachHere(); | |
1328 } break; | |
1329 } | |
1330 } // end copy_entry_to() | |
1331 | |
1332 | |
1333 // Search constant pool search_cp for an entry that matches this | |
1334 // constant pool's entry at pattern_i. Returns the index of a | |
1335 // matching entry or zero (0) if there is no matching entry. | |
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1336 int ConstantPool::find_matching_entry(int pattern_i, |
0 | 1337 constantPoolHandle search_cp, TRAPS) { |
1338 | |
1339 // index zero (0) is not used | |
1340 for (int i = 1; i < search_cp->length(); i++) { | |
1341 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); | |
1342 if (found) { | |
1343 return i; | |
1344 } | |
1345 } | |
1346 | |
1347 return 0; // entry not found; return unused index zero (0) | |
1348 } // end find_matching_entry() | |
1349 | |
1350 | |
1351 #ifndef PRODUCT | |
1352 | |
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1353 const char* ConstantPool::printable_name_at(int which) { |
0 | 1354 |
1355 constantTag tag = tag_at(which); | |
1356 | |
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1357 if (tag.is_string()) { |
0 | 1358 return string_at_noresolve(which); |
1359 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1360 return klass_name_at(which)->as_C_string(); | |
1361 } else if (tag.is_symbol()) { | |
1362 return symbol_at(which)->as_C_string(); | |
1363 } | |
1364 return ""; | |
1365 } | |
1366 | |
1367 #endif // PRODUCT | |
1368 | |
1369 | |
1370 // JVMTI GetConstantPool support | |
1371 | |
1372 // For temporary use until code is stable. | |
1373 #define DBG(code) | |
1374 | |
1375 static const char* WARN_MSG = "Must not be such entry!"; | |
1376 | |
1377 static void print_cpool_bytes(jint cnt, u1 *bytes) { | |
1378 jint size = 0; | |
1379 u2 idx1, idx2; | |
1380 | |
1381 for (jint idx = 1; idx < cnt; idx++) { | |
1382 jint ent_size = 0; | |
1383 u1 tag = *bytes++; | |
1384 size++; // count tag | |
1385 | |
1386 printf("const #%03d, tag: %02d ", idx, tag); | |
1387 switch(tag) { | |
1388 case JVM_CONSTANT_Invalid: { | |
1389 printf("Invalid"); | |
1390 break; | |
1391 } | |
1392 case JVM_CONSTANT_Unicode: { | |
1393 printf("Unicode %s", WARN_MSG); | |
1394 break; | |
1395 } | |
1396 case JVM_CONSTANT_Utf8: { | |
1397 u2 len = Bytes::get_Java_u2(bytes); | |
1398 char str[128]; | |
1399 if (len > 127) { | |
1400 len = 127; | |
1401 } | |
1402 strncpy(str, (char *) (bytes+2), len); | |
1403 str[len] = '\0'; | |
1404 printf("Utf8 \"%s\"", str); | |
1405 ent_size = 2 + len; | |
1406 break; | |
1407 } | |
1408 case JVM_CONSTANT_Integer: { | |
1409 u4 val = Bytes::get_Java_u4(bytes); | |
1410 printf("int %d", *(int *) &val); | |
1411 ent_size = 4; | |
1412 break; | |
1413 } | |
1414 case JVM_CONSTANT_Float: { | |
1415 u4 val = Bytes::get_Java_u4(bytes); | |
1416 printf("float %5.3ff", *(float *) &val); | |
1417 ent_size = 4; | |
1418 break; | |
1419 } | |
1420 case JVM_CONSTANT_Long: { | |
1421 u8 val = Bytes::get_Java_u8(bytes); | |
3960 | 1422 printf("long "INT64_FORMAT, (int64_t) *(jlong *) &val); |
0 | 1423 ent_size = 8; |
1424 idx++; // Long takes two cpool slots | |
1425 break; | |
1426 } | |
1427 case JVM_CONSTANT_Double: { | |
1428 u8 val = Bytes::get_Java_u8(bytes); | |
1429 printf("double %5.3fd", *(jdouble *)&val); | |
1430 ent_size = 8; | |
1431 idx++; // Double takes two cpool slots | |
1432 break; | |
1433 } | |
1434 case JVM_CONSTANT_Class: { | |
1435 idx1 = Bytes::get_Java_u2(bytes); | |
1436 printf("class #%03d", idx1); | |
1437 ent_size = 2; | |
1438 break; | |
1439 } | |
1440 case JVM_CONSTANT_String: { | |
1441 idx1 = Bytes::get_Java_u2(bytes); | |
1442 printf("String #%03d", idx1); | |
1443 ent_size = 2; | |
1444 break; | |
1445 } | |
1446 case JVM_CONSTANT_Fieldref: { | |
1447 idx1 = Bytes::get_Java_u2(bytes); | |
1448 idx2 = Bytes::get_Java_u2(bytes+2); | |
1449 printf("Field #%03d, #%03d", (int) idx1, (int) idx2); | |
1450 ent_size = 4; | |
1451 break; | |
1452 } | |
1453 case JVM_CONSTANT_Methodref: { | |
1454 idx1 = Bytes::get_Java_u2(bytes); | |
1455 idx2 = Bytes::get_Java_u2(bytes+2); | |
1456 printf("Method #%03d, #%03d", idx1, idx2); | |
1457 ent_size = 4; | |
1458 break; | |
1459 } | |
1460 case JVM_CONSTANT_InterfaceMethodref: { | |
1461 idx1 = Bytes::get_Java_u2(bytes); | |
1462 idx2 = Bytes::get_Java_u2(bytes+2); | |
1463 printf("InterfMethod #%03d, #%03d", idx1, idx2); | |
1464 ent_size = 4; | |
1465 break; | |
1466 } | |
1467 case JVM_CONSTANT_NameAndType: { | |
1468 idx1 = Bytes::get_Java_u2(bytes); | |
1469 idx2 = Bytes::get_Java_u2(bytes+2); | |
1470 printf("NameAndType #%03d, #%03d", idx1, idx2); | |
1471 ent_size = 4; | |
1472 break; | |
1473 } | |
1474 case JVM_CONSTANT_ClassIndex: { | |
1475 printf("ClassIndex %s", WARN_MSG); | |
1476 break; | |
1477 } | |
1478 case JVM_CONSTANT_UnresolvedClass: { | |
1479 printf("UnresolvedClass: %s", WARN_MSG); | |
1480 break; | |
1481 } | |
1482 case JVM_CONSTANT_UnresolvedClassInError: { | |
1483 printf("UnresolvedClassInErr: %s", WARN_MSG); | |
1484 break; | |
1485 } | |
1486 case JVM_CONSTANT_StringIndex: { | |
1487 printf("StringIndex: %s", WARN_MSG); | |
1488 break; | |
1489 } | |
1490 } | |
1491 printf(";\n"); | |
1492 bytes += ent_size; | |
1493 size += ent_size; | |
1494 } | |
1495 printf("Cpool size: %d\n", size); | |
1496 fflush(0); | |
1497 return; | |
1498 } /* end print_cpool_bytes */ | |
1499 | |
1500 | |
1501 // Returns size of constant pool entry. | |
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1502 jint ConstantPool::cpool_entry_size(jint idx) { |
0 | 1503 switch(tag_at(idx).value()) { |
1504 case JVM_CONSTANT_Invalid: | |
1505 case JVM_CONSTANT_Unicode: | |
1506 return 1; | |
1507 | |
1508 case JVM_CONSTANT_Utf8: | |
1509 return 3 + symbol_at(idx)->utf8_length(); | |
1510 | |
1511 case JVM_CONSTANT_Class: | |
1512 case JVM_CONSTANT_String: | |
1513 case JVM_CONSTANT_ClassIndex: | |
1514 case JVM_CONSTANT_UnresolvedClass: | |
1515 case JVM_CONSTANT_UnresolvedClassInError: | |
1516 case JVM_CONSTANT_StringIndex: | |
1602 | 1517 case JVM_CONSTANT_MethodType: |
0 | 1518 return 3; |
1519 | |
1602 | 1520 case JVM_CONSTANT_MethodHandle: |
1521 return 4; //tag, ref_kind, ref_index | |
1522 | |
0 | 1523 case JVM_CONSTANT_Integer: |
1524 case JVM_CONSTANT_Float: | |
1525 case JVM_CONSTANT_Fieldref: | |
1526 case JVM_CONSTANT_Methodref: | |
1527 case JVM_CONSTANT_InterfaceMethodref: | |
1528 case JVM_CONSTANT_NameAndType: | |
1913
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1529 return 5; |
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1530 |
1660
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1531 case JVM_CONSTANT_InvokeDynamic: |
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1532 // u1 tag, u2 bsm, u2 nt |
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1533 return 5; |
0 | 1534 |
1535 case JVM_CONSTANT_Long: | |
1536 case JVM_CONSTANT_Double: | |
1537 return 9; | |
1538 } | |
1539 assert(false, "cpool_entry_size: Invalid constant pool entry tag"); | |
1540 return 1; | |
1541 } /* end cpool_entry_size */ | |
1542 | |
1543 | |
1544 // SymbolHashMap is used to find a constant pool index from a string. | |
1545 // This function fills in SymbolHashMaps, one for utf8s and one for | |
1546 // class names, returns size of the cpool raw bytes. | |
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1547 jint ConstantPool::hash_entries_to(SymbolHashMap *symmap, |
0 | 1548 SymbolHashMap *classmap) { |
1549 jint size = 0; | |
1550 | |
1551 for (u2 idx = 1; idx < length(); idx++) { | |
1552 u2 tag = tag_at(idx).value(); | |
1553 size += cpool_entry_size(idx); | |
1554 | |
1555 switch(tag) { | |
1556 case JVM_CONSTANT_Utf8: { | |
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1557 Symbol* sym = symbol_at(idx); |
0 | 1558 symmap->add_entry(sym, idx); |
1559 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); | |
1560 break; | |
1561 } | |
1562 case JVM_CONSTANT_Class: | |
1563 case JVM_CONSTANT_UnresolvedClass: | |
1564 case JVM_CONSTANT_UnresolvedClassInError: { | |
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1565 Symbol* sym = klass_name_at(idx); |
0 | 1566 classmap->add_entry(sym, idx); |
1567 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); | |
1568 break; | |
1569 } | |
1570 case JVM_CONSTANT_Long: | |
1571 case JVM_CONSTANT_Double: { | |
1572 idx++; // Both Long and Double take two cpool slots | |
1573 break; | |
1574 } | |
1575 } | |
1576 } | |
1577 return size; | |
1578 } /* end hash_utf8_entries_to */ | |
1579 | |
1580 | |
1581 // Copy cpool bytes. | |
1582 // Returns: | |
1583 // 0, in case of OutOfMemoryError | |
1584 // -1, in case of internal error | |
1585 // > 0, count of the raw cpool bytes that have been copied | |
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1586 int ConstantPool::copy_cpool_bytes(int cpool_size, |
0 | 1587 SymbolHashMap* tbl, |
1588 unsigned char *bytes) { | |
1589 u2 idx1, idx2; | |
1590 jint size = 0; | |
1591 jint cnt = length(); | |
1592 unsigned char *start_bytes = bytes; | |
1593 | |
1594 for (jint idx = 1; idx < cnt; idx++) { | |
1595 u1 tag = tag_at(idx).value(); | |
1596 jint ent_size = cpool_entry_size(idx); | |
1597 | |
1598 assert(size + ent_size <= cpool_size, "Size mismatch"); | |
1599 | |
1600 *bytes = tag; | |
1601 DBG(printf("#%03hd tag=%03hd, ", idx, tag)); | |
1602 switch(tag) { | |
1603 case JVM_CONSTANT_Invalid: { | |
1604 DBG(printf("JVM_CONSTANT_Invalid")); | |
1605 break; | |
1606 } | |
1607 case JVM_CONSTANT_Unicode: { | |
1608 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); | |
1609 DBG(printf("JVM_CONSTANT_Unicode")); | |
1610 break; | |
1611 } | |
1612 case JVM_CONSTANT_Utf8: { | |
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1613 Symbol* sym = symbol_at(idx); |
0 | 1614 char* str = sym->as_utf8(); |
1615 // Warning! It's crashing on x86 with len = sym->utf8_length() | |
1616 int len = (int) strlen(str); | |
1617 Bytes::put_Java_u2((address) (bytes+1), (u2) len); | |
1618 for (int i = 0; i < len; i++) { | |
1619 bytes[3+i] = (u1) str[i]; | |
1620 } | |
1621 DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); | |
1622 break; | |
1623 } | |
1624 case JVM_CONSTANT_Integer: { | |
1625 jint val = int_at(idx); | |
1626 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1627 break; | |
1628 } | |
1629 case JVM_CONSTANT_Float: { | |
1630 jfloat val = float_at(idx); | |
1631 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
1632 break; | |
1633 } | |
1634 case JVM_CONSTANT_Long: { | |
1635 jlong val = long_at(idx); | |
1636 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1637 idx++; // Long takes two cpool slots | |
1638 break; | |
1639 } | |
1640 case JVM_CONSTANT_Double: { | |
1641 jdouble val = double_at(idx); | |
1642 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
1643 idx++; // Double takes two cpool slots | |
1644 break; | |
1645 } | |
1646 case JVM_CONSTANT_Class: | |
1647 case JVM_CONSTANT_UnresolvedClass: | |
1648 case JVM_CONSTANT_UnresolvedClassInError: { | |
1649 *bytes = JVM_CONSTANT_Class; | |
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1650 Symbol* sym = klass_name_at(idx); |
0 | 1651 idx1 = tbl->symbol_to_value(sym); |
1652 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1653 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1654 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); | |
1655 break; | |
1656 } | |
1657 case JVM_CONSTANT_String: { | |
1658 *bytes = JVM_CONSTANT_String; | |
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1659 Symbol* sym = unresolved_string_at(idx); |
0 | 1660 idx1 = tbl->symbol_to_value(sym); |
1661 assert(idx1 != 0, "Have not found a hashtable entry"); | |
1662 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1663 DBG(char *str = sym->as_utf8()); | |
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1664 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); |
0 | 1665 break; |
1666 } | |
1667 case JVM_CONSTANT_Fieldref: | |
1668 case JVM_CONSTANT_Methodref: | |
1669 case JVM_CONSTANT_InterfaceMethodref: { | |
1670 idx1 = uncached_klass_ref_index_at(idx); | |
1671 idx2 = uncached_name_and_type_ref_index_at(idx); | |
1672 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1673 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1674 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); | |
1675 break; | |
1676 } | |
1677 case JVM_CONSTANT_NameAndType: { | |
1678 idx1 = name_ref_index_at(idx); | |
1679 idx2 = signature_ref_index_at(idx); | |
1680 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1681 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
1682 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); | |
1683 break; | |
1684 } | |
1685 case JVM_CONSTANT_ClassIndex: { | |
1686 *bytes = JVM_CONSTANT_Class; | |
1687 idx1 = klass_index_at(idx); | |
1688 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1689 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); | |
1690 break; | |
1691 } | |
1692 case JVM_CONSTANT_StringIndex: { | |
1693 *bytes = JVM_CONSTANT_String; | |
1694 idx1 = string_index_at(idx); | |
1695 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1696 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); | |
1697 break; | |
1698 } | |
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1699 case JVM_CONSTANT_MethodHandle: |
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1700 case JVM_CONSTANT_MethodHandleInError: { |
1602 | 1701 *bytes = JVM_CONSTANT_MethodHandle; |
1702 int kind = method_handle_ref_kind_at(idx); | |
1703 idx1 = method_handle_index_at(idx); | |
1704 *(bytes+1) = (unsigned char) kind; | |
1705 Bytes::put_Java_u2((address) (bytes+2), idx1); | |
1706 DBG(printf("JVM_CONSTANT_MethodHandle: %d %hd", kind, idx1)); | |
1707 break; | |
1708 } | |
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1709 case JVM_CONSTANT_MethodType: |
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1710 case JVM_CONSTANT_MethodTypeInError: { |
1602 | 1711 *bytes = JVM_CONSTANT_MethodType; |
1712 idx1 = method_type_index_at(idx); | |
1713 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
1714 DBG(printf("JVM_CONSTANT_MethodType: %hd", idx1)); | |
1715 break; | |
1716 } | |
1660
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1717 case JVM_CONSTANT_InvokeDynamic: { |
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1718 *bytes = tag; |
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1719 idx1 = extract_low_short_from_int(*int_at_addr(idx)); |
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1720 idx2 = extract_high_short_from_int(*int_at_addr(idx)); |
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1721 assert(idx2 == invoke_dynamic_name_and_type_ref_index_at(idx), "correct half of u4"); |
1660
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1722 Bytes::put_Java_u2((address) (bytes+1), idx1); |
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1723 Bytes::put_Java_u2((address) (bytes+3), idx2); |
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1724 DBG(printf("JVM_CONSTANT_InvokeDynamic: %hd %hd", idx1, idx2)); |
1660
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1725 break; |
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|
1726 } |
0 | 1727 } |
1728 DBG(printf("\n")); | |
1729 bytes += ent_size; | |
1730 size += ent_size; | |
1731 } | |
1732 assert(size == cpool_size, "Size mismatch"); | |
1733 | |
1734 // Keep temorarily for debugging until it's stable. | |
1735 DBG(print_cpool_bytes(cnt, start_bytes)); | |
1736 return (int)(bytes - start_bytes); | |
1737 } /* end copy_cpool_bytes */ | |
1738 | |
1739 | |
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1740 void ConstantPool::set_on_stack(const bool value) { |
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1741 _on_stack = value; |
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1742 if (value) MetadataOnStackMark::record(this); |
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1743 } |
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1744 |
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1745 // JSR 292 support for patching constant pool oops after the class is linked and |
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1746 // the oop array for resolved references are created. |
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1747 // We can't do this during classfile parsing, which is how the other indexes are |
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1748 // patched. The other patches are applied early for some error checking |
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1749 // so only defer the pseudo_strings. |
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1750 void ConstantPool::patch_resolved_references( |
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1751 GrowableArray<Handle>* cp_patches) { |
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1752 assert(EnableInvokeDynamic, ""); |
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1753 for (int index = 1; index < cp_patches->length(); index++) { // Index 0 is unused |
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1754 Handle patch = cp_patches->at(index); |
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1755 if (patch.not_null()) { |
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1756 assert (tag_at(index).is_string(), "should only be string left"); |
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1757 // Patching a string means pre-resolving it. |
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1758 // The spelling in the constant pool is ignored. |
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1759 // The constant reference may be any object whatever. |
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1760 // If it is not a real interned string, the constant is referred |
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1761 // to as a "pseudo-string", and must be presented to the CP |
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1762 // explicitly, because it may require scavenging. |
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1763 int obj_index = cp_to_object_index(index); |
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1764 pseudo_string_at_put(index, obj_index, patch()); |
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1765 DEBUG_ONLY(cp_patches->at_put(index, Handle());) |
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1766 } |
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1767 } |
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1768 #ifdef ASSERT |
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1769 // Ensure that all the patches have been used. |
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1770 for (int index = 0; index < cp_patches->length(); index++) { |
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1771 assert(cp_patches->at(index).is_null(), |
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1772 err_msg("Unused constant pool patch at %d in class file %s", |
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1773 index, |
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1774 InstanceKlass::cast(pool_holder())->external_name())); |
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1775 } |
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1776 #endif // ASSERT |
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1777 } |
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1778 |
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1779 #ifndef PRODUCT |
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1780 |
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1781 // CompileTheWorld support. Preload all classes loaded references in the passed in constantpool |
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1782 void ConstantPool::preload_and_initialize_all_classes(ConstantPool* obj, TRAPS) { |
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1783 guarantee(obj->is_constantPool(), "object must be constant pool"); |
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1784 constantPoolHandle cp(THREAD, (ConstantPool*)obj); |
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1785 guarantee(cp->pool_holder() != NULL, "must be fully loaded"); |
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1786 |
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1787 for (int i = 0; i< cp->length(); i++) { |
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1788 if (cp->tag_at(i).is_unresolved_klass()) { |
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1789 // This will force loading of the class |
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1790 Klass* klass = cp->klass_at(i, CHECK); |
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1791 if (klass->oop_is_instance()) { |
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1792 // Force initialization of class |
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1793 InstanceKlass::cast(klass)->initialize(CHECK); |
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1794 } |
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1795 } |
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1796 } |
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1797 } |
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1798 |
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1799 #endif |
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1800 |
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1801 |
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1802 // Printing |
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1803 |
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1804 void ConstantPool::print_on(outputStream* st) const { |
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1805 EXCEPTION_MARK; |
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1806 assert(is_constantPool(), "must be constantPool"); |
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1807 st->print_cr(internal_name()); |
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1808 if (flags() != 0) { |
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1809 st->print(" - flags: 0x%x", flags()); |
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1810 if (has_pseudo_string()) st->print(" has_pseudo_string"); |
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1811 if (has_invokedynamic()) st->print(" has_invokedynamic"); |
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1812 if (has_preresolution()) st->print(" has_preresolution"); |
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1813 st->cr(); |
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1814 } |
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1815 if (pool_holder() != NULL) { |
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1816 st->print_cr(" - holder: " INTPTR_FORMAT, pool_holder()); |
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1817 } |
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1818 st->print_cr(" - cache: " INTPTR_FORMAT, cache()); |
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1819 st->print_cr(" - resolved_references: " INTPTR_FORMAT, resolved_references()); |
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1820 st->print_cr(" - reference_map: " INTPTR_FORMAT, reference_map()); |
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1821 |
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1822 for (int index = 1; index < length(); index++) { // Index 0 is unused |
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1823 ((ConstantPool*)this)->print_entry_on(index, st); |
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1824 switch (tag_at(index).value()) { |
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1825 case JVM_CONSTANT_Long : |
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1826 case JVM_CONSTANT_Double : |
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1827 index++; // Skip entry following eigth-byte constant |
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1828 } |
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1829 |
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1830 } |
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1831 st->cr(); |
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1832 } |
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1833 |
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1834 // Print one constant pool entry |
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1835 void ConstantPool::print_entry_on(const int index, outputStream* st) { |
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1836 EXCEPTION_MARK; |
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1837 st->print(" - %3d : ", index); |
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1838 tag_at(index).print_on(st); |
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1839 st->print(" : "); |
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1840 switch (tag_at(index).value()) { |
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1841 case JVM_CONSTANT_Class : |
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1842 { Klass* k = klass_at(index, CATCH); |
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1843 k->print_value_on(st); |
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1844 st->print(" {0x%lx}", (address)k); |
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|
1845 } |
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|
1846 break; |
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|
1847 case JVM_CONSTANT_Fieldref : |
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1848 case JVM_CONSTANT_Methodref : |
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1849 case JVM_CONSTANT_InterfaceMethodref : |
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1850 st->print("klass_index=%d", uncached_klass_ref_index_at(index)); |
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1851 st->print(" name_and_type_index=%d", uncached_name_and_type_ref_index_at(index)); |
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1852 break; |
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|
1853 case JVM_CONSTANT_String : |
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1854 unresolved_string_at(index)->print_value_on(st); |
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|
1855 break; |
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|
1856 case JVM_CONSTANT_Object : { |
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1857 oop anObj = object_at(index); |
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1858 anObj->print_value_on(st); |
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1859 st->print(" {0x%lx}", (address)anObj); |
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1860 } break; |
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|
1861 case JVM_CONSTANT_Integer : |
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1862 st->print("%d", int_at(index)); |
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|
1863 break; |
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1864 case JVM_CONSTANT_Float : |
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1865 st->print("%f", float_at(index)); |
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|
1866 break; |
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1867 case JVM_CONSTANT_Long : |
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1868 st->print_jlong(long_at(index)); |
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|
1869 break; |
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|
1870 case JVM_CONSTANT_Double : |
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1871 st->print("%lf", double_at(index)); |
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|
1872 break; |
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|
1873 case JVM_CONSTANT_NameAndType : |
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1874 st->print("name_index=%d", name_ref_index_at(index)); |
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1875 st->print(" signature_index=%d", signature_ref_index_at(index)); |
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|
1876 break; |
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|
1877 case JVM_CONSTANT_Utf8 : |
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|
1878 symbol_at(index)->print_value_on(st); |
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|
1879 break; |
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|
1880 case JVM_CONSTANT_UnresolvedClass : // fall-through |
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1881 case JVM_CONSTANT_UnresolvedClassInError: { |
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1882 // unresolved_klass_at requires lock or safe world. |
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1883 CPSlot entry = slot_at(index); |
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1884 if (entry.is_resolved()) { |
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1885 entry.get_klass()->print_value_on(st); |
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1886 } else { |
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1887 entry.get_symbol()->print_value_on(st); |
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|
1888 } |
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|
1889 } |
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|
1890 break; |
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|
1891 case JVM_CONSTANT_MethodHandle : |
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1892 case JVM_CONSTANT_MethodHandleInError : |
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1893 st->print("ref_kind=%d", method_handle_ref_kind_at(index)); |
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1894 st->print(" ref_index=%d", method_handle_index_at(index)); |
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|
1895 break; |
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|
1896 case JVM_CONSTANT_MethodType : |
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1897 case JVM_CONSTANT_MethodTypeInError : |
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1898 st->print("signature_index=%d", method_type_index_at(index)); |
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1899 break; |
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|
1900 case JVM_CONSTANT_InvokeDynamic : |
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|
1901 { |
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1902 st->print("bootstrap_method_index=%d", invoke_dynamic_bootstrap_method_ref_index_at(index)); |
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1903 st->print(" name_and_type_index=%d", invoke_dynamic_name_and_type_ref_index_at(index)); |
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1904 int argc = invoke_dynamic_argument_count_at(index); |
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1905 if (argc > 0) { |
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1906 for (int arg_i = 0; arg_i < argc; arg_i++) { |
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1907 int arg = invoke_dynamic_argument_index_at(index, arg_i); |
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1908 st->print((arg_i == 0 ? " arguments={%d" : ", %d"), arg); |
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|
1909 } |
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1910 st->print("}"); |
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|
1911 } |
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|
1912 } |
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1913 break; |
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1914 default: |
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1915 ShouldNotReachHere(); |
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1916 break; |
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1917 } |
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1918 st->cr(); |
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1919 } |
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1920 |
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1921 void ConstantPool::print_value_on(outputStream* st) const { |
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1922 assert(is_constantPool(), "must be constantPool"); |
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1923 st->print("constant pool [%d]", length()); |
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1924 if (has_pseudo_string()) st->print("/pseudo_string"); |
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1925 if (has_invokedynamic()) st->print("/invokedynamic"); |
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1926 if (has_preresolution()) st->print("/preresolution"); |
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1927 if (operands() != NULL) st->print("/operands[%d]", operands()->length()); |
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1928 print_address_on(st); |
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1929 st->print(" for "); |
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1930 pool_holder()->print_value_on(st); |
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1931 if (pool_holder() != NULL) { |
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1932 bool extra = (InstanceKlass::cast(pool_holder())->constants() != this); |
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1933 if (extra) st->print(" (extra)"); |
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1934 } |
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1935 if (cache() != NULL) { |
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1936 st->print(" cache=" PTR_FORMAT, cache()); |
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1937 } |
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1938 } |
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1939 |
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1940 |
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1941 // Verification |
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1942 |
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1943 void ConstantPool::verify_on(outputStream* st) { |
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1944 guarantee(is_constantPool(), "object must be constant pool"); |
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1945 for (int i = 0; i< length(); i++) { |
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1946 constantTag tag = tag_at(i); |
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1947 CPSlot entry = slot_at(i); |
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1948 if (tag.is_klass()) { |
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1949 if (entry.is_resolved()) { |
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1950 guarantee(entry.get_klass()->is_metadata(), "should be metadata"); |
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1951 guarantee(entry.get_klass()->is_klass(), "should be klass"); |
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1952 } |
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1953 } else if (tag.is_unresolved_klass()) { |
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1954 if (entry.is_resolved()) { |
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1955 guarantee(entry.get_klass()->is_metadata(), "should be metadata"); |
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1956 guarantee(entry.get_klass()->is_klass(), "should be klass"); |
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1957 } |
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1958 } else if (tag.is_symbol()) { |
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1959 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count"); |
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1960 } else if (tag.is_string()) { |
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1961 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count"); |
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1962 } |
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1963 } |
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1964 if (cache() != NULL) { |
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1965 // Note: cache() can be NULL before a class is completely setup or |
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1966 // in temporary constant pools used during constant pool merging |
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1967 guarantee(cache()->is_metadata(), "should be metadata"); |
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1968 guarantee(cache()->is_constantPoolCache(), "should be constant pool cache"); |
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1969 } |
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1970 if (pool_holder() != NULL) { |
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1971 // Note: pool_holder() can be NULL in temporary constant pools |
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1972 // used during constant pool merging |
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1973 guarantee(pool_holder()->is_metadata(), "should be metadata"); |
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1974 guarantee(pool_holder()->is_klass(), "should be klass"); |
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1975 } |
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1976 } |
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1977 |
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1978 |
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1979 void SymbolHashMap::add_entry(Symbol* sym, u2 value) { |
0 | 1980 char *str = sym->as_utf8(); |
1981 unsigned int hash = compute_hash(str, sym->utf8_length()); | |
1982 unsigned int index = hash % table_size(); | |
1983 | |
1984 // check if already in map | |
1985 // we prefer the first entry since it is more likely to be what was used in | |
1986 // the class file | |
1987 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
1988 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1989 if (en->hash() == hash && en->symbol() == sym) { | |
1990 return; // already there | |
1991 } | |
1992 } | |
1993 | |
1994 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); | |
1995 entry->set_next(bucket(index)); | |
1996 _buckets[index].set_entry(entry); | |
1997 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
1998 } | |
1999 | |
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2000 SymbolHashMapEntry* SymbolHashMap::find_entry(Symbol* sym) { |
0 | 2001 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); |
2002 char *str = sym->as_utf8(); | |
2003 int len = sym->utf8_length(); | |
2004 unsigned int hash = SymbolHashMap::compute_hash(str, len); | |
2005 unsigned int index = hash % table_size(); | |
2006 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
2007 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
2008 if (en->hash() == hash && en->symbol() == sym) { | |
2009 return en; | |
2010 } | |
2011 } | |
2012 return NULL; | |
2013 } |