Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.cpp @ 2376:c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
Reviewed-by: kvn, coleenp, twisti, stefank
| author | never |
|---|---|
| date | Fri, 18 Mar 2011 16:00:34 -0700 |
| parents | 8033953d67ff |
| children | 38fea01eb669 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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" |
| 26 #include "classfile/classFileParser.hpp" | |
| 27 #include "classfile/classLoader.hpp" | |
| 28 #include "classfile/javaClasses.hpp" | |
| 29 #include "classfile/symbolTable.hpp" | |
| 30 #include "classfile/systemDictionary.hpp" | |
| 31 #include "classfile/verificationType.hpp" | |
| 32 #include "classfile/verifier.hpp" | |
| 33 #include "classfile/vmSymbols.hpp" | |
| 34 #include "memory/allocation.hpp" | |
| 35 #include "memory/gcLocker.hpp" | |
| 36 #include "memory/oopFactory.hpp" | |
| 37 #include "memory/universe.inline.hpp" | |
| 38 #include "oops/constantPoolOop.hpp" | |
| 39 #include "oops/instanceKlass.hpp" | |
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40 #include "oops/instanceMirrorKlass.hpp" |
| 1972 | 41 #include "oops/klass.inline.hpp" |
| 42 #include "oops/klassOop.hpp" | |
| 43 #include "oops/klassVtable.hpp" | |
| 44 #include "oops/methodOop.hpp" | |
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45 #include "oops/symbol.hpp" |
| 1972 | 46 #include "prims/jvmtiExport.hpp" |
| 47 #include "runtime/javaCalls.hpp" | |
| 48 #include "runtime/perfData.hpp" | |
| 49 #include "runtime/reflection.hpp" | |
| 50 #include "runtime/signature.hpp" | |
| 51 #include "runtime/timer.hpp" | |
| 52 #include "services/classLoadingService.hpp" | |
| 53 #include "services/threadService.hpp" | |
| 0 | 54 |
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55 // We generally try to create the oops directly when parsing, rather than |
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56 // allocating temporary data structures and copying the bytes twice. A |
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57 // temporary area is only needed when parsing utf8 entries in the constant |
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58 // pool and when parsing line number tables. |
| 0 | 59 |
| 60 // We add assert in debug mode when class format is not checked. | |
| 61 | |
| 62 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE | |
| 63 #define JAVA_MIN_SUPPORTED_VERSION 45 | |
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64 #define JAVA_MAX_SUPPORTED_VERSION 51 |
| 0 | 65 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 |
| 66 | |
| 67 // Used for two backward compatibility reasons: | |
| 68 // - to check for new additions to the class file format in JDK1.5 | |
| 69 // - to check for bug fixes in the format checker in JDK1.5 | |
| 70 #define JAVA_1_5_VERSION 49 | |
| 71 | |
| 72 // Used for backward compatibility reasons: | |
| 73 // - to check for javac bug fixes that happened after 1.5 | |
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74 // - also used as the max version when running in jdk6 |
| 0 | 75 #define JAVA_6_VERSION 50 |
| 76 | |
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77 // Used for backward compatibility reasons: |
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78 // - to check NameAndType_info signatures more aggressively |
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79 #define JAVA_7_VERSION 51 |
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80 |
| 0 | 81 |
| 82 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) { | |
| 83 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize | |
| 84 // this function (_current can be allocated in a register, with scalar | |
| 85 // replacement of aggregates). The _current pointer is copied back to | |
| 86 // stream() when this function returns. DON'T call another method within | |
| 87 // this method that uses stream(). | |
| 88 ClassFileStream* cfs0 = stream(); | |
| 89 ClassFileStream cfs1 = *cfs0; | |
| 90 ClassFileStream* cfs = &cfs1; | |
| 91 #ifdef ASSERT | |
| 1685 | 92 assert(cfs->allocated_on_stack(),"should be local"); |
| 0 | 93 u1* old_current = cfs0->current(); |
| 94 #endif | |
| 95 | |
| 96 // Used for batching symbol allocations. | |
| 97 const char* names[SymbolTable::symbol_alloc_batch_size]; | |
| 98 int lengths[SymbolTable::symbol_alloc_batch_size]; | |
| 99 int indices[SymbolTable::symbol_alloc_batch_size]; | |
| 100 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; | |
| 101 int names_count = 0; | |
| 102 | |
| 103 // parsing Index 0 is unused | |
| 104 for (int index = 1; index < length; index++) { | |
| 105 // Each of the following case guarantees one more byte in the stream | |
| 106 // for the following tag or the access_flags following constant pool, | |
| 107 // so we don't need bounds-check for reading tag. | |
| 108 u1 tag = cfs->get_u1_fast(); | |
| 109 switch (tag) { | |
| 110 case JVM_CONSTANT_Class : | |
| 111 { | |
| 112 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags | |
| 113 u2 name_index = cfs->get_u2_fast(); | |
| 114 cp->klass_index_at_put(index, name_index); | |
| 115 } | |
| 116 break; | |
| 117 case JVM_CONSTANT_Fieldref : | |
| 118 { | |
| 119 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 120 u2 class_index = cfs->get_u2_fast(); | |
| 121 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 122 cp->field_at_put(index, class_index, name_and_type_index); | |
| 123 } | |
| 124 break; | |
| 125 case JVM_CONSTANT_Methodref : | |
| 126 { | |
| 127 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 128 u2 class_index = cfs->get_u2_fast(); | |
| 129 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 130 cp->method_at_put(index, class_index, name_and_type_index); | |
| 131 } | |
| 132 break; | |
| 133 case JVM_CONSTANT_InterfaceMethodref : | |
| 134 { | |
| 135 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 136 u2 class_index = cfs->get_u2_fast(); | |
| 137 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 138 cp->interface_method_at_put(index, class_index, name_and_type_index); | |
| 139 } | |
| 140 break; | |
| 141 case JVM_CONSTANT_String : | |
| 142 { | |
| 143 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags | |
| 144 u2 string_index = cfs->get_u2_fast(); | |
| 145 cp->string_index_at_put(index, string_index); | |
| 146 } | |
| 147 break; | |
| 1602 | 148 case JVM_CONSTANT_MethodHandle : |
| 149 case JVM_CONSTANT_MethodType : | |
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150 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { |
| 1602 | 151 classfile_parse_error( |
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152 "Class file version does not support constant tag %u in class file %s", |
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153 tag, CHECK); |
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154 } |
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155 if (!EnableMethodHandles) { |
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156 classfile_parse_error( |
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157 "This JVM does not support constant tag %u in class file %s", |
| 1602 | 158 tag, CHECK); |
| 159 } | |
| 160 if (tag == JVM_CONSTANT_MethodHandle) { | |
| 161 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags | |
| 162 u1 ref_kind = cfs->get_u1_fast(); | |
| 163 u2 method_index = cfs->get_u2_fast(); | |
| 164 cp->method_handle_index_at_put(index, ref_kind, method_index); | |
| 165 } else if (tag == JVM_CONSTANT_MethodType) { | |
| 166 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags | |
| 167 u2 signature_index = cfs->get_u2_fast(); | |
| 168 cp->method_type_index_at_put(index, signature_index); | |
| 169 } else { | |
| 170 ShouldNotReachHere(); | |
| 171 } | |
| 172 break; | |
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173 case JVM_CONSTANT_InvokeDynamicTrans : // this tag appears only in old classfiles |
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174 case JVM_CONSTANT_InvokeDynamic : |
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175 { |
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176 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { |
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177 classfile_parse_error( |
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178 "Class file version does not support constant tag %u in class file %s", |
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179 tag, CHECK); |
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180 } |
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181 if (!EnableInvokeDynamic) { |
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182 classfile_parse_error( |
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183 "This JVM does not support constant tag %u in class file %s", |
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184 tag, CHECK); |
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185 } |
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186 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags |
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187 u2 bootstrap_specifier_index = cfs->get_u2_fast(); |
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188 u2 name_and_type_index = cfs->get_u2_fast(); |
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189 if (tag == JVM_CONSTANT_InvokeDynamicTrans) { |
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190 if (!AllowTransitionalJSR292) |
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191 classfile_parse_error( |
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192 "This JVM does not support transitional InvokeDynamic tag %u in class file %s", |
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193 tag, CHECK); |
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194 cp->invoke_dynamic_trans_at_put(index, bootstrap_specifier_index, name_and_type_index); |
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195 break; |
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196 } |
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197 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) |
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198 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later |
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199 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index); |
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200 } |
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201 break; |
| 0 | 202 case JVM_CONSTANT_Integer : |
| 203 { | |
| 204 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 205 u4 bytes = cfs->get_u4_fast(); | |
| 206 cp->int_at_put(index, (jint) bytes); | |
| 207 } | |
| 208 break; | |
| 209 case JVM_CONSTANT_Float : | |
| 210 { | |
| 211 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 212 u4 bytes = cfs->get_u4_fast(); | |
| 213 cp->float_at_put(index, *(jfloat*)&bytes); | |
| 214 } | |
| 215 break; | |
| 216 case JVM_CONSTANT_Long : | |
| 217 // A mangled type might cause you to overrun allocated memory | |
| 218 guarantee_property(index+1 < length, | |
| 219 "Invalid constant pool entry %u in class file %s", | |
| 220 index, CHECK); | |
| 221 { | |
| 222 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 223 u8 bytes = cfs->get_u8_fast(); | |
| 224 cp->long_at_put(index, bytes); | |
| 225 } | |
| 226 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 227 break; | |
| 228 case JVM_CONSTANT_Double : | |
| 229 // A mangled type might cause you to overrun allocated memory | |
| 230 guarantee_property(index+1 < length, | |
| 231 "Invalid constant pool entry %u in class file %s", | |
| 232 index, CHECK); | |
| 233 { | |
| 234 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 235 u8 bytes = cfs->get_u8_fast(); | |
| 236 cp->double_at_put(index, *(jdouble*)&bytes); | |
| 237 } | |
| 238 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 239 break; | |
| 240 case JVM_CONSTANT_NameAndType : | |
| 241 { | |
| 242 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags | |
| 243 u2 name_index = cfs->get_u2_fast(); | |
| 244 u2 signature_index = cfs->get_u2_fast(); | |
| 245 cp->name_and_type_at_put(index, name_index, signature_index); | |
| 246 } | |
| 247 break; | |
| 248 case JVM_CONSTANT_Utf8 : | |
| 249 { | |
| 250 cfs->guarantee_more(2, CHECK); // utf8_length | |
| 251 u2 utf8_length = cfs->get_u2_fast(); | |
| 252 u1* utf8_buffer = cfs->get_u1_buffer(); | |
| 253 assert(utf8_buffer != NULL, "null utf8 buffer"); | |
| 254 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. | |
| 255 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags | |
| 256 cfs->skip_u1_fast(utf8_length); | |
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257 |
| 0 | 258 // Before storing the symbol, make sure it's legal |
| 259 if (_need_verify) { | |
| 260 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); | |
| 261 } | |
| 262 | |
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263 if (AnonymousClasses && has_cp_patch_at(index)) { |
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264 Handle patch = clear_cp_patch_at(index); |
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265 guarantee_property(java_lang_String::is_instance(patch()), |
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266 "Illegal utf8 patch at %d in class file %s", |
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267 index, CHECK); |
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268 char* str = java_lang_String::as_utf8_string(patch()); |
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269 // (could use java_lang_String::as_symbol instead, but might as well batch them) |
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270 utf8_buffer = (u1*) str; |
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271 utf8_length = (int) strlen(str); |
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272 } |
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273 |
| 0 | 274 unsigned int hash; |
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275 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); |
| 0 | 276 if (result == NULL) { |
| 277 names[names_count] = (char*)utf8_buffer; | |
| 278 lengths[names_count] = utf8_length; | |
| 279 indices[names_count] = index; | |
| 280 hashValues[names_count++] = hash; | |
| 281 if (names_count == SymbolTable::symbol_alloc_batch_size) { | |
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282 SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); |
| 0 | 283 names_count = 0; |
| 284 } | |
| 285 } else { | |
| 286 cp->symbol_at_put(index, result); | |
| 287 } | |
| 288 } | |
| 289 break; | |
| 290 default: | |
| 291 classfile_parse_error( | |
| 292 "Unknown constant tag %u in class file %s", tag, CHECK); | |
| 293 break; | |
| 294 } | |
| 295 } | |
| 296 | |
| 297 // Allocate the remaining symbols | |
| 298 if (names_count > 0) { | |
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299 SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); |
| 0 | 300 } |
| 301 | |
| 302 // Copy _current pointer of local copy back to stream(). | |
| 303 #ifdef ASSERT | |
| 304 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); | |
| 305 #endif | |
| 306 cfs0->set_current(cfs1.current()); | |
| 307 } | |
| 308 | |
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309 // This class unreferences constant pool symbols if an error has occurred |
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310 // while parsing the class before it is assigned into the class. |
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311 // If it gets an error after that it is unloaded and the constant pool will |
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312 // be cleaned up then. |
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313 class ConstantPoolCleaner : public StackObj { |
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314 constantPoolHandle _cphandle; |
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315 bool _in_error; |
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316 public: |
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317 ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {} |
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318 ~ConstantPoolCleaner() { |
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319 if (_in_error && _cphandle.not_null()) { |
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320 _cphandle->unreference_symbols(); |
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321 } |
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322 } |
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323 void set_in_error(bool clean) { _in_error = clean; } |
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324 }; |
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325 |
| 0 | 326 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } |
| 327 | |
| 328 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { | |
| 329 ClassFileStream* cfs = stream(); | |
| 330 constantPoolHandle nullHandle; | |
| 331 | |
| 332 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag | |
| 333 u2 length = cfs->get_u2_fast(); | |
| 334 guarantee_property( | |
| 335 length >= 1, "Illegal constant pool size %u in class file %s", | |
| 336 length, CHECK_(nullHandle)); | |
| 337 constantPoolOop constant_pool = | |
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338 oopFactory::new_constantPool(length, |
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339 oopDesc::IsSafeConc, |
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340 CHECK_(nullHandle)); |
| 0 | 341 constantPoolHandle cp (THREAD, constant_pool); |
| 342 | |
| 343 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
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344 ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up. |
| 0 | 345 |
| 346 // parsing constant pool entries | |
| 347 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
| 348 | |
| 349 int index = 1; // declared outside of loops for portability | |
| 350 | |
| 351 // first verification pass - validate cross references and fixup class and string constants | |
| 352 for (index = 1; index < length; index++) { // Index 0 is unused | |
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353 jbyte tag = cp->tag_at(index).value(); |
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354 switch (tag) { |
| 0 | 355 case JVM_CONSTANT_Class : |
| 356 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 357 break; | |
| 358 case JVM_CONSTANT_Fieldref : | |
| 359 // fall through | |
| 360 case JVM_CONSTANT_Methodref : | |
| 361 // fall through | |
| 362 case JVM_CONSTANT_InterfaceMethodref : { | |
| 363 if (!_need_verify) break; | |
| 364 int klass_ref_index = cp->klass_ref_index_at(index); | |
| 365 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 366 check_property(valid_cp_range(klass_ref_index, length) && | |
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367 is_klass_reference(cp, klass_ref_index), |
| 0 | 368 "Invalid constant pool index %u in class file %s", |
| 369 klass_ref_index, | |
| 370 CHECK_(nullHandle)); | |
| 371 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
| 372 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
| 373 "Invalid constant pool index %u in class file %s", | |
| 374 name_and_type_ref_index, | |
| 375 CHECK_(nullHandle)); | |
| 376 break; | |
| 377 } | |
| 378 case JVM_CONSTANT_String : | |
| 379 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 380 break; | |
| 381 case JVM_CONSTANT_Integer : | |
| 382 break; | |
| 383 case JVM_CONSTANT_Float : | |
| 384 break; | |
| 385 case JVM_CONSTANT_Long : | |
| 386 case JVM_CONSTANT_Double : | |
| 387 index++; | |
| 388 check_property( | |
| 389 (index < length && cp->tag_at(index).is_invalid()), | |
| 390 "Improper constant pool long/double index %u in class file %s", | |
| 391 index, CHECK_(nullHandle)); | |
| 392 break; | |
| 393 case JVM_CONSTANT_NameAndType : { | |
| 394 if (!_need_verify) break; | |
| 395 int name_ref_index = cp->name_ref_index_at(index); | |
| 396 int signature_ref_index = cp->signature_ref_index_at(index); | |
| 397 check_property( | |
| 398 valid_cp_range(name_ref_index, length) && | |
| 399 cp->tag_at(name_ref_index).is_utf8(), | |
| 400 "Invalid constant pool index %u in class file %s", | |
| 401 name_ref_index, CHECK_(nullHandle)); | |
| 402 check_property( | |
| 403 valid_cp_range(signature_ref_index, length) && | |
| 404 cp->tag_at(signature_ref_index).is_utf8(), | |
| 405 "Invalid constant pool index %u in class file %s", | |
| 406 signature_ref_index, CHECK_(nullHandle)); | |
| 407 break; | |
| 408 } | |
| 409 case JVM_CONSTANT_Utf8 : | |
| 410 break; | |
| 411 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
| 412 case JVM_CONSTANT_UnresolvedClassInError: | |
| 413 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 414 break; | |
| 415 case JVM_CONSTANT_ClassIndex : | |
| 416 { | |
| 417 int class_index = cp->klass_index_at(index); | |
| 418 check_property( | |
| 419 valid_cp_range(class_index, length) && | |
| 420 cp->tag_at(class_index).is_utf8(), | |
| 421 "Invalid constant pool index %u in class file %s", | |
| 422 class_index, CHECK_(nullHandle)); | |
| 423 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
| 424 } | |
| 425 break; | |
| 426 case JVM_CONSTANT_UnresolvedString : | |
| 427 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 428 break; | |
| 429 case JVM_CONSTANT_StringIndex : | |
| 430 { | |
| 431 int string_index = cp->string_index_at(index); | |
| 432 check_property( | |
| 433 valid_cp_range(string_index, length) && | |
| 434 cp->tag_at(string_index).is_utf8(), | |
| 435 "Invalid constant pool index %u in class file %s", | |
| 436 string_index, CHECK_(nullHandle)); | |
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437 Symbol* sym = cp->symbol_at(string_index); |
| 0 | 438 cp->unresolved_string_at_put(index, sym); |
| 439 } | |
| 440 break; | |
| 1602 | 441 case JVM_CONSTANT_MethodHandle : |
| 442 { | |
| 443 int ref_index = cp->method_handle_index_at(index); | |
| 444 check_property( | |
| 445 valid_cp_range(ref_index, length) && | |
| 446 EnableMethodHandles, | |
| 447 "Invalid constant pool index %u in class file %s", | |
| 448 ref_index, CHECK_(nullHandle)); | |
| 449 constantTag tag = cp->tag_at(ref_index); | |
| 450 int ref_kind = cp->method_handle_ref_kind_at(index); | |
| 451 switch (ref_kind) { | |
| 452 case JVM_REF_getField: | |
| 453 case JVM_REF_getStatic: | |
| 454 case JVM_REF_putField: | |
| 455 case JVM_REF_putStatic: | |
| 456 check_property( | |
| 457 tag.is_field(), | |
| 458 "Invalid constant pool index %u in class file %s (not a field)", | |
| 459 ref_index, CHECK_(nullHandle)); | |
| 460 break; | |
| 461 case JVM_REF_invokeVirtual: | |
| 462 case JVM_REF_invokeStatic: | |
| 463 case JVM_REF_invokeSpecial: | |
| 464 case JVM_REF_newInvokeSpecial: | |
| 465 check_property( | |
| 466 tag.is_method(), | |
| 467 "Invalid constant pool index %u in class file %s (not a method)", | |
| 468 ref_index, CHECK_(nullHandle)); | |
| 469 break; | |
| 470 case JVM_REF_invokeInterface: | |
| 471 check_property( | |
| 472 tag.is_interface_method(), | |
| 473 "Invalid constant pool index %u in class file %s (not an interface method)", | |
| 474 ref_index, CHECK_(nullHandle)); | |
| 475 break; | |
| 476 default: | |
| 477 classfile_parse_error( | |
| 478 "Bad method handle kind at constant pool index %u in class file %s", | |
| 479 index, CHECK_(nullHandle)); | |
| 480 } | |
| 481 // Keep the ref_index unchanged. It will be indirected at link-time. | |
| 482 } | |
| 483 break; | |
| 484 case JVM_CONSTANT_MethodType : | |
| 485 { | |
| 486 int ref_index = cp->method_type_index_at(index); | |
| 487 check_property( | |
| 488 valid_cp_range(ref_index, length) && | |
| 489 cp->tag_at(ref_index).is_utf8() && | |
| 490 EnableMethodHandles, | |
| 491 "Invalid constant pool index %u in class file %s", | |
| 492 ref_index, CHECK_(nullHandle)); | |
| 493 } | |
| 494 break; | |
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495 case JVM_CONSTANT_InvokeDynamicTrans : |
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496 case JVM_CONSTANT_InvokeDynamic : |
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497 { |
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498 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index); |
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499 check_property(valid_cp_range(name_and_type_ref_index, length) && |
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500 cp->tag_at(name_and_type_ref_index).is_name_and_type(), |
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501 "Invalid constant pool index %u in class file %s", |
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502 name_and_type_ref_index, |
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503 CHECK_(nullHandle)); |
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504 if (tag == JVM_CONSTANT_InvokeDynamicTrans) { |
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505 int bootstrap_method_ref_index = cp->invoke_dynamic_bootstrap_method_ref_index_at(index); |
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506 check_property(valid_cp_range(bootstrap_method_ref_index, length) && |
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507 cp->tag_at(bootstrap_method_ref_index).is_method_handle(), |
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508 "Invalid constant pool index %u in class file %s", |
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509 bootstrap_method_ref_index, |
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510 CHECK_(nullHandle)); |
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511 } |
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512 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available |
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513 break; |
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514 } |
| 0 | 515 default: |
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516 fatal(err_msg("bad constant pool tag value %u", |
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517 cp->tag_at(index).value())); |
| 0 | 518 ShouldNotReachHere(); |
| 519 break; | |
| 520 } // end of switch | |
| 521 } // end of for | |
| 522 | |
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523 if (_cp_patches != NULL) { |
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524 // need to treat this_class specially... |
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525 assert(AnonymousClasses, ""); |
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526 int this_class_index; |
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527 { |
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528 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len |
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529 u1* mark = cfs->current(); |
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530 u2 flags = cfs->get_u2_fast(); |
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531 this_class_index = cfs->get_u2_fast(); |
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532 cfs->set_current(mark); // revert to mark |
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533 } |
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534 |
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535 for (index = 1; index < length; index++) { // Index 0 is unused |
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536 if (has_cp_patch_at(index)) { |
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537 guarantee_property(index != this_class_index, |
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538 "Illegal constant pool patch to self at %d in class file %s", |
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539 index, CHECK_(nullHandle)); |
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540 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle)); |
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541 } |
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542 } |
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543 // Ensure that all the patches have been used. |
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544 for (index = 0; index < _cp_patches->length(); index++) { |
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545 guarantee_property(!has_cp_patch_at(index), |
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546 "Unused constant pool patch at %d in class file %s", |
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547 index, CHECK_(nullHandle)); |
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548 } |
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549 } |
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550 |
| 0 | 551 if (!_need_verify) { |
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552 cp_in_error.set_in_error(false); |
| 0 | 553 return cp; |
| 554 } | |
| 555 | |
| 556 // second verification pass - checks the strings are of the right format. | |
|
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557 // but not yet to the other entries |
| 0 | 558 for (index = 1; index < length; index++) { |
| 559 jbyte tag = cp->tag_at(index).value(); | |
| 560 switch (tag) { | |
| 561 case JVM_CONSTANT_UnresolvedClass: { | |
|
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562 Symbol* class_name = cp->unresolved_klass_at(index); |
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563 // check the name, even if _cp_patches will overwrite it |
| 0 | 564 verify_legal_class_name(class_name, CHECK_(nullHandle)); |
| 565 break; | |
| 566 } | |
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567 case JVM_CONSTANT_NameAndType: { |
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568 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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569 int sig_index = cp->signature_ref_index_at(index); |
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570 int name_index = cp->name_ref_index_at(index); |
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571 Symbol* name = cp->symbol_at(name_index); |
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572 Symbol* sig = cp->symbol_at(sig_index); |
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573 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { |
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574 verify_legal_method_signature(name, sig, CHECK_(nullHandle)); |
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575 } else { |
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576 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); |
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577 } |
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578 } |
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579 break; |
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580 } |
| 0 | 581 case JVM_CONSTANT_Fieldref: |
| 582 case JVM_CONSTANT_Methodref: | |
| 583 case JVM_CONSTANT_InterfaceMethodref: { | |
| 584 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 585 // already verified to be utf8 | |
| 586 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
| 587 // already verified to be utf8 | |
| 588 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
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589 Symbol* name = cp->symbol_at(name_ref_index); |
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590 Symbol* signature = cp->symbol_at(signature_ref_index); |
| 0 | 591 if (tag == JVM_CONSTANT_Fieldref) { |
| 592 verify_legal_field_name(name, CHECK_(nullHandle)); | |
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593 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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594 // Signature is verified above, when iterating NameAndType_info. |
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595 // Need only to be sure it's the right type. |
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596 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) { |
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597 throwIllegalSignature( |
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598 "Field", name, signature, CHECK_(nullHandle)); |
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599 } |
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600 } else { |
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601 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); |
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602 } |
| 0 | 603 } else { |
| 604 verify_legal_method_name(name, CHECK_(nullHandle)); | |
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605 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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606 // Signature is verified above, when iterating NameAndType_info. |
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607 // Need only to be sure it's the right type. |
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608 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) { |
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609 throwIllegalSignature( |
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610 "Method", name, signature, CHECK_(nullHandle)); |
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611 } |
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612 } else { |
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613 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); |
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614 } |
| 0 | 615 if (tag == JVM_CONSTANT_Methodref) { |
| 616 // 4509014: If a class method name begins with '<', it must be "<init>". | |
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617 assert(name != NULL, "method name in constant pool is null"); |
| 0 | 618 unsigned int name_len = name->utf8_length(); |
| 619 assert(name_len > 0, "bad method name"); // already verified as legal name | |
| 620 if (name->byte_at(0) == '<') { | |
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621 if (name != vmSymbols::object_initializer_name()) { |
| 0 | 622 classfile_parse_error( |
| 623 "Bad method name at constant pool index %u in class file %s", | |
| 624 name_ref_index, CHECK_(nullHandle)); | |
| 625 } | |
| 626 } | |
| 627 } | |
| 628 } | |
| 629 break; | |
| 630 } | |
| 1602 | 631 case JVM_CONSTANT_MethodHandle: { |
| 632 int ref_index = cp->method_handle_index_at(index); | |
| 633 int ref_kind = cp->method_handle_ref_kind_at(index); | |
| 634 switch (ref_kind) { | |
| 635 case JVM_REF_invokeVirtual: | |
| 636 case JVM_REF_invokeStatic: | |
| 637 case JVM_REF_invokeSpecial: | |
| 638 case JVM_REF_newInvokeSpecial: | |
| 639 { | |
| 640 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index); | |
| 641 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
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642 Symbol* name = cp->symbol_at(name_ref_index); |
| 1602 | 643 if (ref_kind == JVM_REF_newInvokeSpecial) { |
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644 if (name != vmSymbols::object_initializer_name()) { |
| 1602 | 645 classfile_parse_error( |
| 646 "Bad constructor name at constant pool index %u in class file %s", | |
| 647 name_ref_index, CHECK_(nullHandle)); | |
| 648 } | |
| 649 } else { | |
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650 if (name == vmSymbols::object_initializer_name()) { |
| 1602 | 651 classfile_parse_error( |
| 652 "Bad method name at constant pool index %u in class file %s", | |
| 653 name_ref_index, CHECK_(nullHandle)); | |
| 654 } | |
| 655 } | |
| 656 } | |
| 657 break; | |
| 658 // Other ref_kinds are already fully checked in previous pass. | |
| 659 } | |
| 660 break; | |
| 661 } | |
| 662 case JVM_CONSTANT_MethodType: { | |
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663 Symbol* no_name = vmSymbols::type_name(); // place holder |
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664 Symbol* signature = cp->method_type_signature_at(index); |
| 1602 | 665 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle)); |
| 666 break; | |
| 667 } | |
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668 case JVM_CONSTANT_Utf8: { |
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669 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted"); |
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670 } |
| 0 | 671 } // end of switch |
| 672 } // end of for | |
| 673 | |
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674 cp_in_error.set_in_error(false); |
| 0 | 675 return cp; |
| 676 } | |
| 677 | |
| 678 | |
|
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679 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) { |
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680 assert(AnonymousClasses, ""); |
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681 BasicType patch_type = T_VOID; |
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682 switch (cp->tag_at(index).value()) { |
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683 |
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684 case JVM_CONSTANT_UnresolvedClass : |
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685 // Patching a class means pre-resolving it. |
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686 // The name in the constant pool is ignored. |
| 1602 | 687 if (java_lang_Class::is_instance(patch())) { |
|
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688 guarantee_property(!java_lang_Class::is_primitive(patch()), |
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689 "Illegal class patch at %d in class file %s", |
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690 index, CHECK); |
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691 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch())); |
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692 } else { |
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693 guarantee_property(java_lang_String::is_instance(patch()), |
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694 "Illegal class patch at %d in class file %s", |
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695 index, CHECK); |
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696 Symbol* name = java_lang_String::as_symbol(patch(), CHECK); |
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697 cp->unresolved_klass_at_put(index, name); |
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698 } |
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699 break; |
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700 |
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701 case JVM_CONSTANT_UnresolvedString : |
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702 // Patching a string means pre-resolving it. |
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703 // The spelling in the constant pool is ignored. |
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704 // The constant reference may be any object whatever. |
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705 // If it is not a real interned string, the constant is referred |
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706 // to as a "pseudo-string", and must be presented to the CP |
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707 // explicitly, because it may require scavenging. |
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708 cp->pseudo_string_at_put(index, patch()); |
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709 break; |
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710 |
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711 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim; |
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712 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim; |
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713 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim; |
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714 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim; |
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715 patch_prim: |
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716 { |
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717 jvalue value; |
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718 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); |
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719 guarantee_property(value_type == patch_type, |
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720 "Illegal primitive patch at %d in class file %s", |
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721 index, CHECK); |
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722 switch (value_type) { |
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723 case T_INT: cp->int_at_put(index, value.i); break; |
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724 case T_FLOAT: cp->float_at_put(index, value.f); break; |
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725 case T_LONG: cp->long_at_put(index, value.j); break; |
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726 case T_DOUBLE: cp->double_at_put(index, value.d); break; |
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727 default: assert(false, ""); |
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728 } |
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729 } |
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730 break; |
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731 |
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732 default: |
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733 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. |
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734 guarantee_property(!has_cp_patch_at(index), |
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735 "Illegal unexpected patch at %d in class file %s", |
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736 index, CHECK); |
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737 return; |
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738 } |
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739 |
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740 // On fall-through, mark the patch as used. |
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741 clear_cp_patch_at(index); |
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742 } |
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743 |
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744 |
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745 |
| 0 | 746 class NameSigHash: public ResourceObj { |
| 747 public: | |
|
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748 Symbol* _name; // name |
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749 Symbol* _sig; // signature |
| 0 | 750 NameSigHash* _next; // Next entry in hash table |
| 751 }; | |
| 752 | |
| 753 | |
| 754 #define HASH_ROW_SIZE 256 | |
| 755 | |
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756 unsigned int hash(Symbol* name, Symbol* sig) { |
| 0 | 757 unsigned int raw_hash = 0; |
| 758 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
| 759 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
| 760 | |
| 761 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
| 762 } | |
| 763 | |
| 764 | |
| 765 void initialize_hashtable(NameSigHash** table) { | |
| 766 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
| 767 } | |
| 768 | |
| 769 // Return false if the name/sig combination is found in table. | |
| 770 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
| 771 // The old format checker uses heap sort to find duplicates. | |
| 772 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
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773 // of table since we don't expect Symbol*'s to move. |
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774 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) { |
| 0 | 775 assert(name != NULL, "name in constant pool is NULL"); |
| 776 | |
| 777 // First lookup for duplicates | |
| 778 int index = hash(name, sig); | |
| 779 NameSigHash* entry = table[index]; | |
| 780 while (entry != NULL) { | |
| 781 if (entry->_name == name && entry->_sig == sig) { | |
| 782 return false; | |
| 783 } | |
| 784 entry = entry->_next; | |
| 785 } | |
| 786 | |
| 787 // No duplicate is found, allocate a new entry and fill it. | |
| 788 entry = new NameSigHash(); | |
| 789 entry->_name = name; | |
| 790 entry->_sig = sig; | |
| 791 | |
| 792 // Insert into hash table | |
| 793 entry->_next = table[index]; | |
| 794 table[index] = entry; | |
| 795 | |
| 796 return true; | |
| 797 } | |
| 798 | |
| 799 | |
| 800 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
| 801 int length, | |
| 802 Handle class_loader, | |
| 803 Handle protection_domain, | |
|
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804 Symbol* class_name, |
| 0 | 805 TRAPS) { |
| 806 ClassFileStream* cfs = stream(); | |
| 807 assert(length > 0, "only called for length>0"); | |
| 808 objArrayHandle nullHandle; | |
| 809 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 810 objArrayHandle interfaces (THREAD, interface_oop); | |
| 811 | |
| 812 int index; | |
| 813 for (index = 0; index < length; index++) { | |
| 814 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
|
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815 KlassHandle interf; |
| 0 | 816 check_property( |
| 817 valid_cp_range(interface_index, cp->length()) && | |
|
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818 is_klass_reference(cp, interface_index), |
| 0 | 819 "Interface name has bad constant pool index %u in class file %s", |
| 820 interface_index, CHECK_(nullHandle)); | |
|
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821 if (cp->tag_at(interface_index).is_klass()) { |
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822 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); |
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823 } else { |
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824 Symbol* unresolved_klass = cp->klass_name_at(interface_index); |
|
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825 |
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826 // Don't need to check legal name because it's checked when parsing constant pool. |
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827 // But need to make sure it's not an array type. |
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828 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, |
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829 "Bad interface name in class file %s", CHECK_(nullHandle)); |
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830 |
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831 // Call resolve_super so classcircularity is checked |
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832 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, |
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833 unresolved_klass, class_loader, protection_domain, |
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834 false, CHECK_(nullHandle)); |
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835 interf = KlassHandle(THREAD, k); |
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836 |
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837 if (LinkWellKnownClasses) // my super type is well known to me |
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838 cp->klass_at_put(interface_index, interf()); // eagerly resolve |
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839 } |
| 0 | 840 |
| 841 if (!Klass::cast(interf())->is_interface()) { | |
| 842 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
| 843 } | |
| 844 interfaces->obj_at_put(index, interf()); | |
| 845 } | |
| 846 | |
| 847 if (!_need_verify || length <= 1) { | |
| 848 return interfaces; | |
| 849 } | |
| 850 | |
| 851 // Check if there's any duplicates in interfaces | |
| 852 ResourceMark rm(THREAD); | |
| 853 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 854 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 855 initialize_hashtable(interface_names); | |
| 856 bool dup = false; | |
| 857 { | |
| 858 debug_only(No_Safepoint_Verifier nsv;) | |
| 859 for (index = 0; index < length; index++) { | |
| 860 klassOop k = (klassOop)interfaces->obj_at(index); | |
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861 Symbol* name = instanceKlass::cast(k)->name(); |
| 0 | 862 // If no duplicates, add (name, NULL) in hashtable interface_names. |
| 863 if (!put_after_lookup(name, NULL, interface_names)) { | |
| 864 dup = true; | |
| 865 break; | |
| 866 } | |
| 867 } | |
| 868 } | |
| 869 if (dup) { | |
| 870 classfile_parse_error("Duplicate interface name in class file %s", | |
| 871 CHECK_(nullHandle)); | |
| 872 } | |
| 873 | |
| 874 return interfaces; | |
| 875 } | |
| 876 | |
| 877 | |
| 878 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
| 879 // Make sure the constant pool entry is of a type appropriate to this field | |
| 880 guarantee_property( | |
| 881 (constantvalue_index > 0 && | |
| 882 constantvalue_index < cp->length()), | |
| 883 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
| 884 constantvalue_index, CHECK); | |
| 885 constantTag value_type = cp->tag_at(constantvalue_index); | |
| 886 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
| 887 case T_LONG: | |
| 888 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
| 889 break; | |
| 890 case T_FLOAT: | |
| 891 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
| 892 break; | |
| 893 case T_DOUBLE: | |
| 894 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
| 895 break; | |
| 896 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
| 897 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
| 898 break; | |
| 899 case T_OBJECT: | |
|
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900 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") |
| 0 | 901 && (value_type.is_string() || value_type.is_unresolved_string())), |
| 902 "Bad string initial value in class file %s", CHECK); | |
| 903 break; | |
| 904 default: | |
| 905 classfile_parse_error( | |
| 906 "Unable to set initial value %u in class file %s", | |
| 907 constantvalue_index, CHECK); | |
| 908 } | |
| 909 } | |
| 910 | |
| 911 | |
| 912 // Parse attributes for a field. | |
| 913 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
| 914 u2 attributes_count, | |
| 915 bool is_static, u2 signature_index, | |
| 916 u2* constantvalue_index_addr, | |
| 917 bool* is_synthetic_addr, | |
| 918 u2* generic_signature_index_addr, | |
| 919 typeArrayHandle* field_annotations, | |
| 920 TRAPS) { | |
| 921 ClassFileStream* cfs = stream(); | |
| 922 assert(attributes_count > 0, "length should be greater than 0"); | |
| 923 u2 constantvalue_index = 0; | |
| 924 u2 generic_signature_index = 0; | |
| 925 bool is_synthetic = false; | |
| 926 u1* runtime_visible_annotations = NULL; | |
| 927 int runtime_visible_annotations_length = 0; | |
| 928 u1* runtime_invisible_annotations = NULL; | |
| 929 int runtime_invisible_annotations_length = 0; | |
| 930 while (attributes_count--) { | |
| 931 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 932 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 933 u4 attribute_length = cfs->get_u4_fast(); | |
| 934 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
| 935 cp->tag_at(attribute_name_index).is_utf8(), | |
| 936 "Invalid field attribute index %u in class file %s", | |
| 937 attribute_name_index, | |
| 938 CHECK); | |
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939 Symbol* attribute_name = cp->symbol_at(attribute_name_index); |
| 0 | 940 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { |
| 941 // ignore if non-static | |
| 942 if (constantvalue_index != 0) { | |
| 943 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
| 944 } | |
| 945 check_property( | |
| 946 attribute_length == 2, | |
| 947 "Invalid ConstantValue field attribute length %u in class file %s", | |
| 948 attribute_length, CHECK); | |
| 949 constantvalue_index = cfs->get_u2(CHECK); | |
| 950 if (_need_verify) { | |
| 951 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
| 952 } | |
| 953 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
| 954 if (attribute_length != 0) { | |
| 955 classfile_parse_error( | |
| 956 "Invalid Synthetic field attribute length %u in class file %s", | |
| 957 attribute_length, CHECK); | |
| 958 } | |
| 959 is_synthetic = true; | |
| 960 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 961 if (attribute_length != 0) { | |
| 962 classfile_parse_error( | |
| 963 "Invalid Deprecated field attribute length %u in class file %s", | |
| 964 attribute_length, CHECK); | |
| 965 } | |
| 966 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 967 if (attribute_name == vmSymbols::tag_signature()) { | |
| 968 if (attribute_length != 2) { | |
| 969 classfile_parse_error( | |
| 970 "Wrong size %u for field's Signature attribute in class file %s", | |
| 971 attribute_length, CHECK); | |
| 972 } | |
| 973 generic_signature_index = cfs->get_u2(CHECK); | |
| 974 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 975 runtime_visible_annotations_length = attribute_length; | |
| 976 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 977 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 978 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 979 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 980 runtime_invisible_annotations_length = attribute_length; | |
| 981 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 982 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 983 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 984 } else { | |
| 985 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 986 } | |
| 987 } else { | |
| 988 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 989 } | |
| 990 } | |
| 991 | |
| 992 *constantvalue_index_addr = constantvalue_index; | |
| 993 *is_synthetic_addr = is_synthetic; | |
| 994 *generic_signature_index_addr = generic_signature_index; | |
| 995 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
| 996 runtime_visible_annotations_length, | |
| 997 runtime_invisible_annotations, | |
| 998 runtime_invisible_annotations_length, | |
| 999 CHECK); | |
| 1000 return; | |
| 1001 } | |
| 1002 | |
| 1003 | |
| 1004 // Field allocation types. Used for computing field offsets. | |
| 1005 | |
| 1006 enum FieldAllocationType { | |
| 1007 STATIC_OOP, // Oops | |
| 1008 STATIC_BYTE, // Boolean, Byte, char | |
| 1009 STATIC_SHORT, // shorts | |
| 1010 STATIC_WORD, // ints | |
| 1011 STATIC_DOUBLE, // long or double | |
| 1012 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
| 1013 NONSTATIC_OOP, | |
| 1014 NONSTATIC_BYTE, | |
| 1015 NONSTATIC_SHORT, | |
| 1016 NONSTATIC_WORD, | |
| 1017 NONSTATIC_DOUBLE, | |
| 1018 NONSTATIC_ALIGNED_DOUBLE | |
| 1019 }; | |
| 1020 | |
| 1021 | |
| 1022 struct FieldAllocationCount { | |
|
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1023 unsigned int static_oop_count; |
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1024 unsigned int static_byte_count; |
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1025 unsigned int static_short_count; |
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1026 unsigned int static_word_count; |
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1027 unsigned int static_double_count; |
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1028 unsigned int nonstatic_oop_count; |
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1029 unsigned int nonstatic_byte_count; |
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1030 unsigned int nonstatic_short_count; |
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1031 unsigned int nonstatic_word_count; |
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1032 unsigned int nonstatic_double_count; |
| 0 | 1033 }; |
| 1034 | |
| 1035 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
| 1036 struct FieldAllocationCount *fac, | |
| 1037 objArrayHandle* fields_annotations, TRAPS) { | |
| 1038 ClassFileStream* cfs = stream(); | |
| 1039 typeArrayHandle nullHandle; | |
| 1040 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 1041 u2 length = cfs->get_u2_fast(); | |
| 1042 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
| 1043 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
| 1044 typeArrayHandle fields(THREAD, new_fields); | |
| 1045 | |
| 1046 int index = 0; | |
| 1047 typeArrayHandle field_annotations; | |
| 1048 for (int n = 0; n < length; n++) { | |
| 1049 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 1050 | |
| 1051 AccessFlags access_flags; | |
| 1052 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
| 1053 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
| 1054 access_flags.set_flags(flags); | |
| 1055 | |
| 1056 u2 name_index = cfs->get_u2_fast(); | |
| 1057 int cp_size = cp->length(); | |
| 1058 check_property( | |
| 1059 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
| 1060 "Invalid constant pool index %u for field name in class file %s", | |
| 1061 name_index, CHECK_(nullHandle)); | |
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1062 Symbol* name = cp->symbol_at(name_index); |
| 0 | 1063 verify_legal_field_name(name, CHECK_(nullHandle)); |
| 1064 | |
| 1065 u2 signature_index = cfs->get_u2_fast(); | |
| 1066 check_property( | |
| 1067 valid_cp_range(signature_index, cp_size) && | |
| 1068 cp->tag_at(signature_index).is_utf8(), | |
| 1069 "Invalid constant pool index %u for field signature in class file %s", | |
| 1070 signature_index, CHECK_(nullHandle)); | |
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1071 Symbol* sig = cp->symbol_at(signature_index); |
| 0 | 1072 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); |
| 1073 | |
| 1074 u2 constantvalue_index = 0; | |
| 1075 bool is_synthetic = false; | |
| 1076 u2 generic_signature_index = 0; | |
| 1077 bool is_static = access_flags.is_static(); | |
| 1078 | |
| 1079 u2 attributes_count = cfs->get_u2_fast(); | |
| 1080 if (attributes_count > 0) { | |
| 1081 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
| 1082 &constantvalue_index, &is_synthetic, | |
| 1083 &generic_signature_index, &field_annotations, | |
| 1084 CHECK_(nullHandle)); | |
| 1085 if (field_annotations.not_null()) { | |
| 1086 if (fields_annotations->is_null()) { | |
| 1087 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1088 *fields_annotations = objArrayHandle(THREAD, md); | |
| 1089 } | |
| 1090 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
| 1091 } | |
| 1092 if (is_synthetic) { | |
| 1093 access_flags.set_is_synthetic(); | |
| 1094 } | |
| 1095 } | |
| 1096 | |
| 1097 fields->short_at_put(index++, access_flags.as_short()); | |
| 1098 fields->short_at_put(index++, name_index); | |
| 1099 fields->short_at_put(index++, signature_index); | |
| 1100 fields->short_at_put(index++, constantvalue_index); | |
| 1101 | |
| 1102 // Remember how many oops we encountered and compute allocation type | |
| 1103 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
| 1104 FieldAllocationType atype; | |
| 1105 if ( is_static ) { | |
| 1106 switch ( type ) { | |
| 1107 case T_BOOLEAN: | |
| 1108 case T_BYTE: | |
| 1109 fac->static_byte_count++; | |
| 1110 atype = STATIC_BYTE; | |
| 1111 break; | |
| 1112 case T_LONG: | |
| 1113 case T_DOUBLE: | |
| 1114 if (Universe::field_type_should_be_aligned(type)) { | |
| 1115 atype = STATIC_ALIGNED_DOUBLE; | |
| 1116 } else { | |
| 1117 atype = STATIC_DOUBLE; | |
| 1118 } | |
| 1119 fac->static_double_count++; | |
| 1120 break; | |
| 1121 case T_CHAR: | |
| 1122 case T_SHORT: | |
| 1123 fac->static_short_count++; | |
| 1124 atype = STATIC_SHORT; | |
| 1125 break; | |
| 1126 case T_FLOAT: | |
| 1127 case T_INT: | |
| 1128 fac->static_word_count++; | |
| 1129 atype = STATIC_WORD; | |
| 1130 break; | |
| 1131 case T_ARRAY: | |
| 1132 case T_OBJECT: | |
| 1133 fac->static_oop_count++; | |
| 1134 atype = STATIC_OOP; | |
| 1135 break; | |
| 1136 case T_ADDRESS: | |
| 1137 case T_VOID: | |
| 1138 default: | |
| 1139 assert(0, "bad field type"); | |
| 1140 } | |
| 1141 } else { | |
| 1142 switch ( type ) { | |
| 1143 case T_BOOLEAN: | |
| 1144 case T_BYTE: | |
| 1145 fac->nonstatic_byte_count++; | |
| 1146 atype = NONSTATIC_BYTE; | |
| 1147 break; | |
| 1148 case T_LONG: | |
| 1149 case T_DOUBLE: | |
| 1150 if (Universe::field_type_should_be_aligned(type)) { | |
| 1151 atype = NONSTATIC_ALIGNED_DOUBLE; | |
| 1152 } else { | |
| 1153 atype = NONSTATIC_DOUBLE; | |
| 1154 } | |
| 1155 fac->nonstatic_double_count++; | |
| 1156 break; | |
| 1157 case T_CHAR: | |
| 1158 case T_SHORT: | |
| 1159 fac->nonstatic_short_count++; | |
| 1160 atype = NONSTATIC_SHORT; | |
| 1161 break; | |
| 1162 case T_FLOAT: | |
| 1163 case T_INT: | |
| 1164 fac->nonstatic_word_count++; | |
| 1165 atype = NONSTATIC_WORD; | |
| 1166 break; | |
| 1167 case T_ARRAY: | |
| 1168 case T_OBJECT: | |
| 1169 fac->nonstatic_oop_count++; | |
| 1170 atype = NONSTATIC_OOP; | |
| 1171 break; | |
| 1172 case T_ADDRESS: | |
| 1173 case T_VOID: | |
| 1174 default: | |
| 1175 assert(0, "bad field type"); | |
| 1176 } | |
| 1177 } | |
| 1178 | |
| 1179 // The correct offset is computed later (all oop fields will be located together) | |
| 1180 // We temporarily store the allocation type in the offset field | |
| 1181 fields->short_at_put(index++, atype); | |
| 1182 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
| 1183 fields->short_at_put(index++, generic_signature_index); | |
| 1184 } | |
| 1185 | |
| 1186 if (_need_verify && length > 1) { | |
| 1187 // Check duplicated fields | |
| 1188 ResourceMark rm(THREAD); | |
| 1189 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1190 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 1191 initialize_hashtable(names_and_sigs); | |
| 1192 bool dup = false; | |
| 1193 { | |
| 1194 debug_only(No_Safepoint_Verifier nsv;) | |
| 1195 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
| 1196 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
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1197 Symbol* name = cp->symbol_at(name_index); |
| 0 | 1198 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); |
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1199 Symbol* sig = cp->symbol_at(sig_index); |
| 0 | 1200 // If no duplicates, add name/signature in hashtable names_and_sigs. |
| 1201 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
| 1202 dup = true; | |
| 1203 break; | |
| 1204 } | |
| 1205 } | |
| 1206 } | |
| 1207 if (dup) { | |
| 1208 classfile_parse_error("Duplicate field name&signature in class file %s", | |
| 1209 CHECK_(nullHandle)); | |
| 1210 } | |
| 1211 } | |
| 1212 | |
| 1213 return fields; | |
| 1214 } | |
| 1215 | |
| 1216 | |
| 1217 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
| 1218 while (length-- > 0) { | |
| 1219 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
| 1220 } | |
| 1221 } | |
| 1222 | |
| 1223 | |
| 1224 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
| 1225 u4 exception_table_length, | |
| 1226 constantPoolHandle cp, | |
| 1227 TRAPS) { | |
| 1228 ClassFileStream* cfs = stream(); | |
| 1229 typeArrayHandle nullHandle; | |
| 1230 | |
| 1231 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
| 1232 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
| 1233 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
| 1234 | |
| 1235 int index = 0; | |
| 1236 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
| 1237 for (unsigned int i = 0; i < exception_table_length; i++) { | |
| 1238 u2 start_pc = cfs->get_u2_fast(); | |
| 1239 u2 end_pc = cfs->get_u2_fast(); | |
| 1240 u2 handler_pc = cfs->get_u2_fast(); | |
| 1241 u2 catch_type_index = cfs->get_u2_fast(); | |
| 1242 // Will check legal target after parsing code array in verifier. | |
| 1243 if (_need_verify) { | |
| 1244 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
| 1245 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
| 1246 guarantee_property(handler_pc < code_length, | |
| 1247 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
| 1248 if (catch_type_index != 0) { | |
| 1249 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
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1250 is_klass_reference(cp, catch_type_index), |
| 0 | 1251 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); |
| 1252 } | |
| 1253 } | |
| 1254 exception_handlers->int_at_put(index++, start_pc); | |
| 1255 exception_handlers->int_at_put(index++, end_pc); | |
| 1256 exception_handlers->int_at_put(index++, handler_pc); | |
| 1257 exception_handlers->int_at_put(index++, catch_type_index); | |
| 1258 } | |
| 1259 return exception_handlers; | |
| 1260 } | |
| 1261 | |
| 1262 void ClassFileParser::parse_linenumber_table( | |
| 1263 u4 code_attribute_length, u4 code_length, | |
| 1264 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
| 1265 ClassFileStream* cfs = stream(); | |
| 1266 unsigned int num_entries = cfs->get_u2(CHECK); | |
| 1267 | |
| 1268 // Each entry is a u2 start_pc, and a u2 line_number | |
| 1269 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
| 1270 | |
| 1271 // Verify line number attribute and table length | |
| 1272 check_property( | |
| 1273 code_attribute_length == sizeof(u2) + length_in_bytes, | |
| 1274 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
| 1275 | |
| 1276 cfs->guarantee_more(length_in_bytes, CHECK); | |
| 1277 | |
| 1278 if ((*write_stream) == NULL) { | |
| 1279 if (length_in_bytes > fixed_buffer_size) { | |
| 1280 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
| 1281 } else { | |
| 1282 (*write_stream) = new CompressedLineNumberWriteStream( | |
| 1283 linenumbertable_buffer, fixed_buffer_size); | |
| 1284 } | |
| 1285 } | |
| 1286 | |
| 1287 while (num_entries-- > 0) { | |
| 1288 u2 bci = cfs->get_u2_fast(); // start_pc | |
| 1289 u2 line = cfs->get_u2_fast(); // line_number | |
| 1290 guarantee_property(bci < code_length, | |
| 1291 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
| 1292 (*write_stream)->write_pair(bci, line); | |
| 1293 } | |
| 1294 } | |
| 1295 | |
| 1296 | |
| 1297 // Class file LocalVariableTable elements. | |
| 1298 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
| 1299 public: | |
| 1300 u2 start_bci; | |
| 1301 u2 length; | |
| 1302 u2 name_cp_index; | |
| 1303 u2 descriptor_cp_index; | |
| 1304 u2 slot; | |
| 1305 }; | |
| 1306 | |
| 1307 | |
| 1308 class LVT_Hash: public CHeapObj { | |
| 1309 public: | |
| 1310 LocalVariableTableElement *_elem; // element | |
| 1311 LVT_Hash* _next; // Next entry in hash table | |
| 1312 }; | |
| 1313 | |
| 1314 unsigned int hash(LocalVariableTableElement *elem) { | |
| 1315 unsigned int raw_hash = elem->start_bci; | |
| 1316 | |
| 1317 raw_hash = elem->length + raw_hash * 37; | |
| 1318 raw_hash = elem->name_cp_index + raw_hash * 37; | |
| 1319 raw_hash = elem->slot + raw_hash * 37; | |
| 1320 | |
| 1321 return raw_hash % HASH_ROW_SIZE; | |
| 1322 } | |
| 1323 | |
| 1324 void initialize_hashtable(LVT_Hash** table) { | |
| 1325 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 1326 table[i] = NULL; | |
| 1327 } | |
| 1328 } | |
| 1329 | |
| 1330 void clear_hashtable(LVT_Hash** table) { | |
| 1331 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 1332 LVT_Hash* current = table[i]; | |
| 1333 LVT_Hash* next; | |
| 1334 while (current != NULL) { | |
| 1335 next = current->_next; | |
| 1336 current->_next = NULL; | |
| 1337 delete(current); | |
| 1338 current = next; | |
| 1339 } | |
| 1340 table[i] = NULL; | |
| 1341 } | |
| 1342 } | |
| 1343 | |
| 1344 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
| 1345 LVT_Hash* entry = table[index]; | |
| 1346 | |
| 1347 /* | |
| 1348 * 3-tuple start_bci/length/slot has to be unique key, | |
| 1349 * so the following comparison seems to be redundant: | |
| 1350 * && elem->name_cp_index == entry->_elem->name_cp_index | |
| 1351 */ | |
| 1352 while (entry != NULL) { | |
| 1353 if (elem->start_bci == entry->_elem->start_bci | |
| 1354 && elem->length == entry->_elem->length | |
| 1355 && elem->name_cp_index == entry->_elem->name_cp_index | |
| 1356 && elem->slot == entry->_elem->slot | |
| 1357 ) { | |
| 1358 return entry; | |
| 1359 } | |
| 1360 entry = entry->_next; | |
| 1361 } | |
| 1362 return NULL; | |
| 1363 } | |
| 1364 | |
| 1365 // Return false if the local variable is found in table. | |
| 1366 // Return true if no duplicate is found. | |
| 1367 // And local variable is added as a new entry in table. | |
| 1368 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
| 1369 // First lookup for duplicates | |
| 1370 int index = hash(elem); | |
| 1371 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
| 1372 | |
| 1373 if (entry != NULL) { | |
| 1374 return false; | |
| 1375 } | |
| 1376 // No duplicate is found, allocate a new entry and fill it. | |
| 1377 if ((entry = new LVT_Hash()) == NULL) { | |
| 1378 return false; | |
| 1379 } | |
| 1380 entry->_elem = elem; | |
| 1381 | |
| 1382 // Insert into hash table | |
| 1383 entry->_next = table[index]; | |
| 1384 table[index] = entry; | |
| 1385 | |
| 1386 return true; | |
| 1387 } | |
| 1388 | |
| 1389 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
| 1390 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
| 1391 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
| 1392 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
| 1393 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
| 1394 lvt->signature_cp_index = 0; | |
| 1395 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
| 1396 } | |
| 1397 | |
| 1398 // Function is used to parse both attributes: | |
| 1399 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
| 1400 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
| 1401 u2 max_locals, | |
| 1402 u4 code_attribute_length, | |
| 1403 constantPoolHandle cp, | |
| 1404 u2* localvariable_table_length, | |
| 1405 bool isLVTT, | |
| 1406 TRAPS) { | |
| 1407 ClassFileStream* cfs = stream(); | |
| 1408 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
| 1409 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
| 1410 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
| 1411 // Verify local variable table attribute has right length | |
| 1412 if (_need_verify) { | |
| 1413 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
| 1414 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
| 1415 } | |
| 1416 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
| 1417 assert(localvariable_table_start != NULL, "null local variable table"); | |
| 1418 if (!_need_verify) { | |
| 1419 cfs->skip_u2_fast(size); | |
| 1420 } else { | |
| 1421 cfs->guarantee_more(size * 2, CHECK_NULL); | |
| 1422 for(int i = 0; i < (*localvariable_table_length); i++) { | |
| 1423 u2 start_pc = cfs->get_u2_fast(); | |
| 1424 u2 length = cfs->get_u2_fast(); | |
| 1425 u2 name_index = cfs->get_u2_fast(); | |
| 1426 u2 descriptor_index = cfs->get_u2_fast(); | |
| 1427 u2 index = cfs->get_u2_fast(); | |
| 1428 // Assign to a u4 to avoid overflow | |
| 1429 u4 end_pc = (u4)start_pc + (u4)length; | |
| 1430 | |
| 1431 if (start_pc >= code_length) { | |
| 1432 classfile_parse_error( | |
| 1433 "Invalid start_pc %u in %s in class file %s", | |
| 1434 start_pc, tbl_name, CHECK_NULL); | |
| 1435 } | |
| 1436 if (end_pc > code_length) { | |
| 1437 classfile_parse_error( | |
| 1438 "Invalid length %u in %s in class file %s", | |
| 1439 length, tbl_name, CHECK_NULL); | |
| 1440 } | |
| 1441 int cp_size = cp->length(); | |
| 1442 guarantee_property( | |
| 1443 valid_cp_range(name_index, cp_size) && | |
| 1444 cp->tag_at(name_index).is_utf8(), | |
| 1445 "Name index %u in %s has bad constant type in class file %s", | |
| 1446 name_index, tbl_name, CHECK_NULL); | |
| 1447 guarantee_property( | |
| 1448 valid_cp_range(descriptor_index, cp_size) && | |
| 1449 cp->tag_at(descriptor_index).is_utf8(), | |
| 1450 "Signature index %u in %s has bad constant type in class file %s", | |
| 1451 descriptor_index, tbl_name, CHECK_NULL); | |
| 1452 | |
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1453 Symbol* name = cp->symbol_at(name_index); |
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1454 Symbol* sig = cp->symbol_at(descriptor_index); |
| 0 | 1455 verify_legal_field_name(name, CHECK_NULL); |
| 1456 u2 extra_slot = 0; | |
| 1457 if (!isLVTT) { | |
| 1458 verify_legal_field_signature(name, sig, CHECK_NULL); | |
| 1459 | |
| 1460 // 4894874: check special cases for double and long local variables | |
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1461 if (sig == vmSymbols::type_signature(T_DOUBLE) || |
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1462 sig == vmSymbols::type_signature(T_LONG)) { |
| 0 | 1463 extra_slot = 1; |
| 1464 } | |
| 1465 } | |
| 1466 guarantee_property((index + extra_slot) < max_locals, | |
| 1467 "Invalid index %u in %s in class file %s", | |
| 1468 index, tbl_name, CHECK_NULL); | |
| 1469 } | |
| 1470 } | |
| 1471 return localvariable_table_start; | |
| 1472 } | |
| 1473 | |
| 1474 | |
| 1475 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
| 1476 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
| 1477 ClassFileStream* cfs = stream(); | |
| 1478 u2 index = 0; // index in the array with long/double occupying two slots | |
| 1479 u4 i1 = *u1_index; | |
| 1480 u4 i2 = *u2_index + 1; | |
| 1481 for(int i = 0; i < array_length; i++) { | |
| 1482 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
| 1483 index++; | |
| 1484 if (tag == ITEM_Long || tag == ITEM_Double) { | |
| 1485 index++; | |
| 1486 } else if (tag == ITEM_Object) { | |
| 1487 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1488 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
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1489 is_klass_reference(cp, class_index), |
| 0 | 1490 "Bad class index %u in StackMap in class file %s", |
| 1491 class_index, CHECK); | |
| 1492 } else if (tag == ITEM_Uninitialized) { | |
| 1493 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1494 guarantee_property( | |
| 1495 offset < code_length, | |
| 1496 "Bad uninitialized type offset %u in StackMap in class file %s", | |
| 1497 offset, CHECK); | |
| 1498 } else { | |
| 1499 guarantee_property( | |
| 1500 tag <= (u1)ITEM_Uninitialized, | |
| 1501 "Unknown variable type %u in StackMap in class file %s", | |
| 1502 tag, CHECK); | |
| 1503 } | |
| 1504 } | |
| 1505 u2_array[*u2_index] = index; | |
| 1506 *u1_index = i1; | |
| 1507 *u2_index = i2; | |
| 1508 } | |
| 1509 | |
| 1510 typeArrayOop ClassFileParser::parse_stackmap_table( | |
| 1511 u4 code_attribute_length, TRAPS) { | |
| 1512 if (code_attribute_length == 0) | |
| 1513 return NULL; | |
| 1514 | |
| 1515 ClassFileStream* cfs = stream(); | |
| 1516 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
| 1517 assert(stackmap_table_start != NULL, "null stackmap table"); | |
| 1518 | |
| 1519 // check code_attribute_length first | |
| 1520 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
| 1521 | |
| 1522 if (!_need_verify && !DumpSharedSpaces) { | |
| 1523 return NULL; | |
| 1524 } | |
| 1525 | |
| 1526 typeArrayOop stackmap_data = | |
| 1527 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
| 1528 | |
| 1529 stackmap_data->set_length(code_attribute_length); | |
| 1530 memcpy((void*)stackmap_data->byte_at_addr(0), | |
| 1531 (void*)stackmap_table_start, code_attribute_length); | |
| 1532 return stackmap_data; | |
| 1533 } | |
| 1534 | |
| 1535 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
| 1536 u4 method_attribute_length, | |
| 1537 constantPoolHandle cp, TRAPS) { | |
| 1538 ClassFileStream* cfs = stream(); | |
| 1539 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
| 1540 *checked_exceptions_length = cfs->get_u2_fast(); | |
| 1541 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1542 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
| 1543 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
| 1544 if (!_need_verify) { | |
| 1545 cfs->skip_u2_fast(size); | |
| 1546 } else { | |
| 1547 // Verify each value in the checked exception table | |
| 1548 u2 checked_exception; | |
| 1549 u2 len = *checked_exceptions_length; | |
| 1550 cfs->guarantee_more(2 * len, CHECK_NULL); | |
| 1551 for (int i = 0; i < len; i++) { | |
| 1552 checked_exception = cfs->get_u2_fast(); | |
| 1553 check_property( | |
| 1554 valid_cp_range(checked_exception, cp->length()) && | |
|
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1555 is_klass_reference(cp, checked_exception), |
| 0 | 1556 "Exception name has bad type at constant pool %u in class file %s", |
| 1557 checked_exception, CHECK_NULL); | |
| 1558 } | |
| 1559 } | |
| 1560 // check exceptions attribute length | |
| 1561 if (_need_verify) { | |
| 1562 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
| 1563 sizeof(u2) * size), | |
| 1564 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
| 1565 } | |
| 1566 return checked_exceptions_start; | |
| 1567 } | |
| 1568 | |
|
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1569 void ClassFileParser::throwIllegalSignature( |
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1570 const char* type, Symbol* name, Symbol* sig, TRAPS) { |
|
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1571 ResourceMark rm(THREAD); |
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1572 Exceptions::fthrow(THREAD_AND_LOCATION, |
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1573 vmSymbols::java_lang_ClassFormatError(), |
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1574 "%s \"%s\" in class %s has illegal signature \"%s\"", type, |
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1575 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); |
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1576 } |
| 0 | 1577 |
| 1578 #define MAX_ARGS_SIZE 255 | |
| 1579 #define MAX_CODE_SIZE 65535 | |
| 1580 #define INITIAL_MAX_LVT_NUMBER 256 | |
| 1581 | |
| 1582 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
| 1583 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
| 1584 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
| 1585 // entire method attribute is parsed. | |
| 1586 // | |
| 1587 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1588 // from the method back up to the containing klass. These flag values | |
| 1589 // are added to klass's access_flags. | |
| 1590 | |
| 1591 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
| 1592 AccessFlags *promoted_flags, | |
| 1593 typeArrayHandle* method_annotations, | |
| 1594 typeArrayHandle* method_parameter_annotations, | |
| 1595 typeArrayHandle* method_default_annotations, | |
| 1596 TRAPS) { | |
| 1597 ClassFileStream* cfs = stream(); | |
| 1598 methodHandle nullHandle; | |
| 1599 ResourceMark rm(THREAD); | |
| 1600 // Parse fixed parts | |
| 1601 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 1602 | |
| 1603 int flags = cfs->get_u2_fast(); | |
| 1604 u2 name_index = cfs->get_u2_fast(); | |
| 1605 int cp_size = cp->length(); | |
| 1606 check_property( | |
| 1607 valid_cp_range(name_index, cp_size) && | |
| 1608 cp->tag_at(name_index).is_utf8(), | |
| 1609 "Illegal constant pool index %u for method name in class file %s", | |
| 1610 name_index, CHECK_(nullHandle)); | |
|
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1611 Symbol* name = cp->symbol_at(name_index); |
| 0 | 1612 verify_legal_method_name(name, CHECK_(nullHandle)); |
| 1613 | |
| 1614 u2 signature_index = cfs->get_u2_fast(); | |
| 1615 guarantee_property( | |
| 1616 valid_cp_range(signature_index, cp_size) && | |
| 1617 cp->tag_at(signature_index).is_utf8(), | |
| 1618 "Illegal constant pool index %u for method signature in class file %s", | |
| 1619 signature_index, CHECK_(nullHandle)); | |
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1620 Symbol* signature = cp->symbol_at(signature_index); |
| 0 | 1621 |
| 1622 AccessFlags access_flags; | |
| 1623 if (name == vmSymbols::class_initializer_name()) { | |
|
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1624 // We ignore the other access flags for a valid class initializer. |
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1625 // (JVM Spec 2nd ed., chapter 4.6) |
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1626 if (_major_version < 51) { // backward compatibility |
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1627 flags = JVM_ACC_STATIC; |
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1628 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) { |
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1629 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT; |
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1630 } |
| 0 | 1631 } else { |
| 1632 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
| 1633 } | |
| 1634 | |
| 1635 int args_size = -1; // only used when _need_verify is true | |
| 1636 if (_need_verify) { | |
| 1637 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
| 1638 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 1639 if (args_size > MAX_ARGS_SIZE) { | |
| 1640 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
| 1641 } | |
| 1642 } | |
| 1643 | |
| 1644 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 1645 | |
| 1646 // Default values for code and exceptions attribute elements | |
| 1647 u2 max_stack = 0; | |
| 1648 u2 max_locals = 0; | |
| 1649 u4 code_length = 0; | |
| 1650 u1* code_start = 0; | |
| 1651 u2 exception_table_length = 0; | |
| 1652 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
| 1653 u2 checked_exceptions_length = 0; | |
| 1654 u2* checked_exceptions_start = NULL; | |
| 1655 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
| 1656 int linenumber_table_length = 0; | |
| 1657 int total_lvt_length = 0; | |
| 1658 u2 lvt_cnt = 0; | |
| 1659 u2 lvtt_cnt = 0; | |
| 1660 bool lvt_allocated = false; | |
| 1661 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1662 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1663 u2* localvariable_table_length; | |
| 1664 u2** localvariable_table_start; | |
| 1665 u2* localvariable_type_table_length; | |
| 1666 u2** localvariable_type_table_start; | |
| 1667 bool parsed_code_attribute = false; | |
| 1668 bool parsed_checked_exceptions_attribute = false; | |
| 1669 bool parsed_stackmap_attribute = false; | |
| 1670 // stackmap attribute - JDK1.5 | |
| 1671 typeArrayHandle stackmap_data; | |
| 1672 u2 generic_signature_index = 0; | |
| 1673 u1* runtime_visible_annotations = NULL; | |
| 1674 int runtime_visible_annotations_length = 0; | |
| 1675 u1* runtime_invisible_annotations = NULL; | |
| 1676 int runtime_invisible_annotations_length = 0; | |
| 1677 u1* runtime_visible_parameter_annotations = NULL; | |
| 1678 int runtime_visible_parameter_annotations_length = 0; | |
| 1679 u1* runtime_invisible_parameter_annotations = NULL; | |
| 1680 int runtime_invisible_parameter_annotations_length = 0; | |
| 1681 u1* annotation_default = NULL; | |
| 1682 int annotation_default_length = 0; | |
| 1683 | |
| 1684 // Parse code and exceptions attribute | |
| 1685 u2 method_attributes_count = cfs->get_u2_fast(); | |
| 1686 while (method_attributes_count--) { | |
| 1687 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
| 1688 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
| 1689 u4 method_attribute_length = cfs->get_u4_fast(); | |
| 1690 check_property( | |
| 1691 valid_cp_range(method_attribute_name_index, cp_size) && | |
| 1692 cp->tag_at(method_attribute_name_index).is_utf8(), | |
| 1693 "Invalid method attribute name index %u in class file %s", | |
| 1694 method_attribute_name_index, CHECK_(nullHandle)); | |
| 1695 | |
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1696 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index); |
| 0 | 1697 if (method_attribute_name == vmSymbols::tag_code()) { |
| 1698 // Parse Code attribute | |
| 1699 if (_need_verify) { | |
| 1700 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
| 1701 "Code attribute in native or abstract methods in class file %s", | |
| 1702 CHECK_(nullHandle)); | |
| 1703 } | |
| 1704 if (parsed_code_attribute) { | |
| 1705 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
| 1706 } | |
| 1707 parsed_code_attribute = true; | |
| 1708 | |
| 1709 // Stack size, locals size, and code size | |
| 1710 if (_major_version == 45 && _minor_version <= 2) { | |
| 1711 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
| 1712 max_stack = cfs->get_u1_fast(); | |
| 1713 max_locals = cfs->get_u1_fast(); | |
| 1714 code_length = cfs->get_u2_fast(); | |
| 1715 } else { | |
| 1716 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
| 1717 max_stack = cfs->get_u2_fast(); | |
| 1718 max_locals = cfs->get_u2_fast(); | |
| 1719 code_length = cfs->get_u4_fast(); | |
| 1720 } | |
| 1721 if (_need_verify) { | |
| 1722 guarantee_property(args_size <= max_locals, | |
| 1723 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
| 1724 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
| 1725 "Invalid method Code length %u in class file %s", | |
| 1726 code_length, CHECK_(nullHandle)); | |
| 1727 } | |
| 1728 // Code pointer | |
| 1729 code_start = cfs->get_u1_buffer(); | |
| 1730 assert(code_start != NULL, "null code start"); | |
| 1731 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
| 1732 cfs->skip_u1_fast(code_length); | |
| 1733 | |
| 1734 // Exception handler table | |
| 1735 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
| 1736 exception_table_length = cfs->get_u2_fast(); | |
| 1737 if (exception_table_length > 0) { | |
| 1738 exception_handlers = | |
| 1739 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
| 1740 } | |
| 1741 | |
| 1742 // Parse additional attributes in code attribute | |
| 1743 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
| 1744 u2 code_attributes_count = cfs->get_u2_fast(); | |
|
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1745 |
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1746 unsigned int calculated_attribute_length = 0; |
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1747 |
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1748 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1749 calculated_attribute_length = |
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1750 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1751 } else { |
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1752 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1753 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1754 } |
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1755 calculated_attribute_length += |
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1756 code_length + |
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1757 sizeof(exception_table_length) + |
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1758 sizeof(code_attributes_count) + |
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1759 exception_table_length * |
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1760 ( sizeof(u2) + // start_pc |
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1761 sizeof(u2) + // end_pc |
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1762 sizeof(u2) + // handler_pc |
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1763 sizeof(u2) ); // catch_type_index |
| 0 | 1764 |
| 1765 while (code_attributes_count--) { | |
| 1766 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
| 1767 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
| 1768 u4 code_attribute_length = cfs->get_u4_fast(); | |
| 1769 calculated_attribute_length += code_attribute_length + | |
| 1770 sizeof(code_attribute_name_index) + | |
| 1771 sizeof(code_attribute_length); | |
| 1772 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
| 1773 cp->tag_at(code_attribute_name_index).is_utf8(), | |
| 1774 "Invalid code attribute name index %u in class file %s", | |
| 1775 code_attribute_name_index, | |
| 1776 CHECK_(nullHandle)); | |
| 1777 if (LoadLineNumberTables && | |
| 1778 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
| 1779 // Parse and compress line number table | |
| 1780 parse_linenumber_table(code_attribute_length, code_length, | |
| 1781 &linenumber_table, CHECK_(nullHandle)); | |
| 1782 | |
| 1783 } else if (LoadLocalVariableTables && | |
| 1784 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
| 1785 // Parse local variable table | |
| 1786 if (!lvt_allocated) { | |
| 1787 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1788 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1789 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1790 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1791 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1792 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1793 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1794 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1795 lvt_allocated = true; | |
| 1796 } | |
| 1797 if (lvt_cnt == max_lvt_cnt) { | |
| 1798 max_lvt_cnt <<= 1; | |
| 1799 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
| 1800 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
| 1801 } | |
| 1802 localvariable_table_start[lvt_cnt] = | |
| 1803 parse_localvariable_table(code_length, | |
| 1804 max_locals, | |
| 1805 code_attribute_length, | |
| 1806 cp, | |
| 1807 &localvariable_table_length[lvt_cnt], | |
| 1808 false, // is not LVTT | |
| 1809 CHECK_(nullHandle)); | |
| 1810 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
| 1811 lvt_cnt++; | |
| 1812 } else if (LoadLocalVariableTypeTables && | |
| 1813 _major_version >= JAVA_1_5_VERSION && | |
| 1814 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
| 1815 if (!lvt_allocated) { | |
| 1816 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1817 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1818 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1819 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1820 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1821 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1822 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1823 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1824 lvt_allocated = true; | |
| 1825 } | |
| 1826 // Parse local variable type table | |
| 1827 if (lvtt_cnt == max_lvtt_cnt) { | |
| 1828 max_lvtt_cnt <<= 1; | |
| 1829 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
| 1830 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
| 1831 } | |
| 1832 localvariable_type_table_start[lvtt_cnt] = | |
| 1833 parse_localvariable_table(code_length, | |
| 1834 max_locals, | |
| 1835 code_attribute_length, | |
| 1836 cp, | |
| 1837 &localvariable_type_table_length[lvtt_cnt], | |
| 1838 true, // is LVTT | |
| 1839 CHECK_(nullHandle)); | |
| 1840 lvtt_cnt++; | |
| 1841 } else if (UseSplitVerifier && | |
| 1842 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
| 1843 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
| 1844 // Stack map is only needed by the new verifier in JDK1.5. | |
| 1845 if (parsed_stackmap_attribute) { | |
| 1846 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
| 1847 } | |
| 1848 typeArrayOop sm = | |
| 1849 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
| 1850 stackmap_data = typeArrayHandle(THREAD, sm); | |
| 1851 parsed_stackmap_attribute = true; | |
| 1852 } else { | |
| 1853 // Skip unknown attributes | |
| 1854 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
| 1855 } | |
| 1856 } | |
| 1857 // check method attribute length | |
| 1858 if (_need_verify) { | |
| 1859 guarantee_property(method_attribute_length == calculated_attribute_length, | |
| 1860 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
| 1861 } | |
| 1862 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
| 1863 // Parse Exceptions attribute | |
| 1864 if (parsed_checked_exceptions_attribute) { | |
| 1865 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
| 1866 } | |
| 1867 parsed_checked_exceptions_attribute = true; | |
| 1868 checked_exceptions_start = | |
| 1869 parse_checked_exceptions(&checked_exceptions_length, | |
| 1870 method_attribute_length, | |
| 1871 cp, CHECK_(nullHandle)); | |
| 1872 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
| 1873 if (method_attribute_length != 0) { | |
| 1874 classfile_parse_error( | |
| 1875 "Invalid Synthetic method attribute length %u in class file %s", | |
| 1876 method_attribute_length, CHECK_(nullHandle)); | |
| 1877 } | |
| 1878 // Should we check that there hasn't already been a synthetic attribute? | |
| 1879 access_flags.set_is_synthetic(); | |
| 1880 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 1881 if (method_attribute_length != 0) { | |
| 1882 classfile_parse_error( | |
| 1883 "Invalid Deprecated method attribute length %u in class file %s", | |
| 1884 method_attribute_length, CHECK_(nullHandle)); | |
| 1885 } | |
| 1886 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 1887 if (method_attribute_name == vmSymbols::tag_signature()) { | |
| 1888 if (method_attribute_length != 2) { | |
| 1889 classfile_parse_error( | |
| 1890 "Invalid Signature attribute length %u in class file %s", | |
| 1891 method_attribute_length, CHECK_(nullHandle)); | |
| 1892 } | |
| 1893 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
| 1894 generic_signature_index = cfs->get_u2_fast(); | |
| 1895 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 1896 runtime_visible_annotations_length = method_attribute_length; | |
| 1897 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 1898 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 1899 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
| 1900 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 1901 runtime_invisible_annotations_length = method_attribute_length; | |
| 1902 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 1903 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 1904 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
| 1905 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
| 1906 runtime_visible_parameter_annotations_length = method_attribute_length; | |
| 1907 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1908 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
| 1909 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1910 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
| 1911 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
| 1912 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1913 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
| 1914 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1915 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
| 1916 annotation_default_length = method_attribute_length; | |
| 1917 annotation_default = cfs->get_u1_buffer(); | |
| 1918 assert(annotation_default != NULL, "null annotation default"); | |
| 1919 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
| 1920 } else { | |
| 1921 // Skip unknown attributes | |
| 1922 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1923 } | |
| 1924 } else { | |
| 1925 // Skip unknown attributes | |
| 1926 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1927 } | |
| 1928 } | |
| 1929 | |
| 1930 if (linenumber_table != NULL) { | |
| 1931 linenumber_table->write_terminator(); | |
| 1932 linenumber_table_length = linenumber_table->position(); | |
| 1933 } | |
| 1934 | |
| 1935 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
| 1936 if (_need_verify) { | |
| 1937 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
| 1938 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
| 1939 } | |
| 1940 | |
| 1941 // All sizing information for a methodOop is finally available, now create it | |
|
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1942 methodOop m_oop = oopFactory::new_method(code_length, access_flags, linenumber_table_length, |
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1943 total_lvt_length, checked_exceptions_length, |
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1944 oopDesc::IsSafeConc, CHECK_(nullHandle)); |
| 0 | 1945 methodHandle m (THREAD, m_oop); |
| 1946 | |
| 1947 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
| 1948 | |
| 1949 // Fill in information from fixed part (access_flags already set) | |
| 1950 m->set_constants(cp()); | |
| 1951 m->set_name_index(name_index); | |
| 1952 m->set_signature_index(signature_index); | |
| 1953 m->set_generic_signature_index(generic_signature_index); | |
| 1954 #ifdef CC_INTERP | |
| 1955 // hmm is there a gc issue here?? | |
| 1956 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
| 1957 m->set_result_index(rtf.type()); | |
| 1958 #endif | |
| 1959 | |
| 1960 if (args_size >= 0) { | |
| 1961 m->set_size_of_parameters(args_size); | |
| 1962 } else { | |
| 1963 m->compute_size_of_parameters(THREAD); | |
| 1964 } | |
| 1965 #ifdef ASSERT | |
| 1966 if (args_size >= 0) { | |
| 1967 m->compute_size_of_parameters(THREAD); | |
| 1968 assert(args_size == m->size_of_parameters(), ""); | |
| 1969 } | |
| 1970 #endif | |
| 1971 | |
| 1972 // Fill in code attribute information | |
| 1973 m->set_max_stack(max_stack); | |
| 1974 m->set_max_locals(max_locals); | |
| 1975 m->constMethod()->set_stackmap_data(stackmap_data()); | |
| 1976 | |
| 1977 /** | |
| 1978 * The exception_table field is the flag used to indicate | |
| 1979 * that the methodOop and it's associated constMethodOop are partially | |
| 1980 * initialized and thus are exempt from pre/post GC verification. Once | |
| 1981 * the field is set, the oops are considered fully initialized so make | |
| 1982 * sure that the oops can pass verification when this field is set. | |
| 1983 */ | |
| 1984 m->set_exception_table(exception_handlers()); | |
| 1985 | |
| 1986 // Copy byte codes | |
|
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1987 m->set_code(code_start); |
| 0 | 1988 |
| 1989 // Copy line number table | |
| 1990 if (linenumber_table != NULL) { | |
| 1991 memcpy(m->compressed_linenumber_table(), | |
| 1992 linenumber_table->buffer(), linenumber_table_length); | |
| 1993 } | |
| 1994 | |
| 1995 // Copy checked exceptions | |
| 1996 if (checked_exceptions_length > 0) { | |
| 1997 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1998 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
| 1999 } | |
| 2000 | |
| 2001 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
| 2002 * | |
| 2003 * Rules for LVT's and LVTT's are: | |
| 2004 * - There can be any number of LVT's and LVTT's. | |
| 2005 * - If there are n LVT's, it is the same as if there was just | |
| 2006 * one LVT containing all the entries from the n LVT's. | |
| 2007 * - There may be no more than one LVT entry per local variable. | |
| 2008 * Two LVT entries are 'equal' if these fields are the same: | |
| 2009 * start_pc, length, name, slot | |
| 2010 * - There may be no more than one LVTT entry per each LVT entry. | |
| 2011 * Each LVTT entry has to match some LVT entry. | |
| 2012 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
| 2013 */ | |
| 2014 if (total_lvt_length > 0) { | |
| 2015 int tbl_no, idx; | |
| 2016 | |
| 2017 promoted_flags->set_has_localvariable_table(); | |
| 2018 | |
| 2019 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
| 2020 initialize_hashtable(lvt_Hash); | |
| 2021 | |
| 2022 // To fill LocalVariableTable in | |
| 2023 Classfile_LVT_Element* cf_lvt; | |
| 2024 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
| 2025 | |
| 2026 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
| 2027 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
| 2028 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
| 2029 copy_lvt_element(&cf_lvt[idx], lvt); | |
| 2030 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
| 2031 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
| 2032 && _need_verify | |
| 2033 && _major_version >= JAVA_1_5_VERSION ) { | |
| 2034 clear_hashtable(lvt_Hash); | |
| 2035 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
| 2036 "entry for '%s' in class file %s", | |
| 2037 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
| 2038 CHECK_(nullHandle)); | |
| 2039 } | |
| 2040 } | |
| 2041 } | |
| 2042 | |
| 2043 // To merge LocalVariableTable and LocalVariableTypeTable | |
| 2044 Classfile_LVT_Element* cf_lvtt; | |
| 2045 LocalVariableTableElement lvtt_elem; | |
| 2046 | |
| 2047 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
| 2048 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
| 2049 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
| 2050 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
| 2051 int index = hash(&lvtt_elem); | |
| 2052 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
| 2053 if (entry == NULL) { | |
| 2054 if (_need_verify) { | |
| 2055 clear_hashtable(lvt_Hash); | |
| 2056 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
| 2057 "does not match any LVT entry", | |
| 2058 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 2059 CHECK_(nullHandle)); | |
| 2060 } | |
| 2061 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
| 2062 clear_hashtable(lvt_Hash); | |
| 2063 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
| 2064 "entry for '%s' in class file %s", | |
| 2065 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 2066 CHECK_(nullHandle)); | |
| 2067 } else { | |
| 2068 // to add generic signatures into LocalVariableTable | |
| 2069 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
| 2070 } | |
| 2071 } | |
| 2072 } | |
| 2073 clear_hashtable(lvt_Hash); | |
| 2074 } | |
| 2075 | |
| 2076 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
| 2077 runtime_visible_annotations_length, | |
| 2078 runtime_invisible_annotations, | |
| 2079 runtime_invisible_annotations_length, | |
| 2080 CHECK_(nullHandle)); | |
| 2081 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
| 2082 runtime_visible_parameter_annotations_length, | |
| 2083 runtime_invisible_parameter_annotations, | |
| 2084 runtime_invisible_parameter_annotations_length, | |
| 2085 CHECK_(nullHandle)); | |
| 2086 *method_default_annotations = assemble_annotations(annotation_default, | |
| 2087 annotation_default_length, | |
| 2088 NULL, | |
| 2089 0, | |
| 2090 CHECK_(nullHandle)); | |
| 2091 | |
|
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2092 if (name == vmSymbols::finalize_method_name() && |
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2093 signature == vmSymbols::void_method_signature()) { |
| 0 | 2094 if (m->is_empty_method()) { |
| 2095 _has_empty_finalizer = true; | |
| 2096 } else { | |
| 2097 _has_finalizer = true; | |
| 2098 } | |
| 2099 } | |
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2100 if (name == vmSymbols::object_initializer_name() && |
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2101 signature == vmSymbols::void_method_signature() && |
| 0 | 2102 m->is_vanilla_constructor()) { |
| 2103 _has_vanilla_constructor = true; | |
| 2104 } | |
| 2105 | |
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2106 if (EnableMethodHandles && (m->is_method_handle_invoke() || |
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2107 m->is_method_handle_adapter())) { |
| 710 | 2108 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(), |
| 2109 "Method handle invokers must be defined internally to the VM", nullHandle); | |
| 2110 } | |
| 2111 | |
| 0 | 2112 return m; |
| 2113 } | |
| 2114 | |
| 2115 | |
| 2116 // The promoted_flags parameter is used to pass relevant access_flags | |
| 2117 // from the methods back up to the containing klass. These flag values | |
| 2118 // are added to klass's access_flags. | |
| 2119 | |
| 2120 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
| 2121 AccessFlags* promoted_flags, | |
| 2122 bool* has_final_method, | |
| 2123 objArrayOop* methods_annotations_oop, | |
| 2124 objArrayOop* methods_parameter_annotations_oop, | |
| 2125 objArrayOop* methods_default_annotations_oop, | |
| 2126 TRAPS) { | |
| 2127 ClassFileStream* cfs = stream(); | |
| 2128 objArrayHandle nullHandle; | |
| 2129 typeArrayHandle method_annotations; | |
| 2130 typeArrayHandle method_parameter_annotations; | |
| 2131 typeArrayHandle method_default_annotations; | |
| 2132 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 2133 u2 length = cfs->get_u2_fast(); | |
| 2134 if (length == 0) { | |
| 2135 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 2136 } else { | |
| 2137 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2138 objArrayHandle methods(THREAD, m); | |
| 2139 HandleMark hm(THREAD); | |
| 2140 objArrayHandle methods_annotations; | |
| 2141 objArrayHandle methods_parameter_annotations; | |
| 2142 objArrayHandle methods_default_annotations; | |
| 2143 for (int index = 0; index < length; index++) { | |
| 2144 methodHandle method = parse_method(cp, is_interface, | |
| 2145 promoted_flags, | |
| 2146 &method_annotations, | |
| 2147 &method_parameter_annotations, | |
| 2148 &method_default_annotations, | |
| 2149 CHECK_(nullHandle)); | |
| 2150 if (method->is_final()) { | |
| 2151 *has_final_method = true; | |
| 2152 } | |
| 2153 methods->obj_at_put(index, method()); | |
| 2154 if (method_annotations.not_null()) { | |
| 2155 if (methods_annotations.is_null()) { | |
| 2156 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2157 methods_annotations = objArrayHandle(THREAD, md); | |
| 2158 } | |
| 2159 methods_annotations->obj_at_put(index, method_annotations()); | |
| 2160 } | |
| 2161 if (method_parameter_annotations.not_null()) { | |
| 2162 if (methods_parameter_annotations.is_null()) { | |
| 2163 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2164 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
| 2165 } | |
| 2166 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
| 2167 } | |
| 2168 if (method_default_annotations.not_null()) { | |
| 2169 if (methods_default_annotations.is_null()) { | |
| 2170 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2171 methods_default_annotations = objArrayHandle(THREAD, md); | |
| 2172 } | |
| 2173 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
| 2174 } | |
| 2175 } | |
| 2176 if (_need_verify && length > 1) { | |
| 2177 // Check duplicated methods | |
| 2178 ResourceMark rm(THREAD); | |
| 2179 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 2180 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 2181 initialize_hashtable(names_and_sigs); | |
| 2182 bool dup = false; | |
| 2183 { | |
| 2184 debug_only(No_Safepoint_Verifier nsv;) | |
| 2185 for (int i = 0; i < length; i++) { | |
| 2186 methodOop m = (methodOop)methods->obj_at(i); | |
| 2187 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 2188 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
| 2189 dup = true; | |
| 2190 break; | |
| 2191 } | |
| 2192 } | |
| 2193 } | |
| 2194 if (dup) { | |
| 2195 classfile_parse_error("Duplicate method name&signature in class file %s", | |
| 2196 CHECK_(nullHandle)); | |
| 2197 } | |
| 2198 } | |
| 2199 | |
| 2200 *methods_annotations_oop = methods_annotations(); | |
| 2201 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
| 2202 *methods_default_annotations_oop = methods_default_annotations(); | |
| 2203 | |
| 2204 return methods; | |
| 2205 } | |
| 2206 } | |
| 2207 | |
| 2208 | |
| 2209 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
| 2210 objArrayHandle methods_annotations, | |
| 2211 objArrayHandle methods_parameter_annotations, | |
| 2212 objArrayHandle methods_default_annotations, | |
| 2213 TRAPS) { | |
| 2214 typeArrayHandle nullHandle; | |
| 2215 int length = methods()->length(); | |
| 2216 // If JVMTI original method ordering is enabled we have to | |
| 2217 // remember the original class file ordering. | |
| 2218 // We temporarily use the vtable_index field in the methodOop to store the | |
| 2219 // class file index, so we can read in after calling qsort. | |
| 2220 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 2221 for (int index = 0; index < length; index++) { | |
| 2222 methodOop m = methodOop(methods->obj_at(index)); | |
| 2223 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
| 2224 m->set_vtable_index(index); | |
| 2225 } | |
| 2226 } | |
| 2227 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
|
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2228 // Note that the ordering is not alphabetical, see Symbol::fast_compare |
| 0 | 2229 methodOopDesc::sort_methods(methods(), |
| 2230 methods_annotations(), | |
| 2231 methods_parameter_annotations(), | |
| 2232 methods_default_annotations()); | |
| 2233 | |
| 2234 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
| 2235 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 2236 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
| 2237 typeArrayHandle method_ordering(THREAD, new_ordering); | |
| 2238 for (int index = 0; index < length; index++) { | |
| 2239 methodOop m = methodOop(methods->obj_at(index)); | |
| 2240 int old_index = m->vtable_index(); | |
| 2241 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
| 2242 method_ordering->int_at_put(index, old_index); | |
| 2243 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
| 2244 } | |
| 2245 return method_ordering; | |
| 2246 } else { | |
| 2247 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
| 2248 } | |
| 2249 } | |
| 2250 | |
| 2251 | |
| 2252 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2253 ClassFileStream* cfs = stream(); | |
| 2254 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
| 2255 u2 sourcefile_index = cfs->get_u2_fast(); | |
| 2256 check_property( | |
| 2257 valid_cp_range(sourcefile_index, cp->length()) && | |
| 2258 cp->tag_at(sourcefile_index).is_utf8(), | |
| 2259 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
| 2260 sourcefile_index, CHECK); | |
| 2261 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
| 2262 } | |
| 2263 | |
| 2264 | |
| 2265 | |
| 2266 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
| 2267 instanceKlassHandle k, | |
| 2268 int length, TRAPS) { | |
| 2269 ClassFileStream* cfs = stream(); | |
| 2270 u1* sde_buffer = cfs->get_u1_buffer(); | |
| 2271 assert(sde_buffer != NULL, "null sde buffer"); | |
| 2272 | |
| 2273 // Don't bother storing it if there is no way to retrieve it | |
| 2274 if (JvmtiExport::can_get_source_debug_extension()) { | |
| 2275 // Optimistically assume that only 1 byte UTF format is used | |
| 2276 // (common case) | |
|
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2277 TempNewSymbol sde_symbol = SymbolTable::new_symbol((const char*)sde_buffer, length, CHECK); |
| 0 | 2278 k->set_source_debug_extension(sde_symbol); |
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2279 // Note that set_source_debug_extension() increments the reference count |
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|
2280 // for its copy of the Symbol*, so use a TempNewSymbol here. |
| 0 | 2281 } |
| 2282 // Got utf8 string, set stream position forward | |
| 2283 cfs->skip_u1(length, CHECK); | |
| 2284 } | |
| 2285 | |
| 2286 | |
| 2287 // Inner classes can be static, private or protected (classic VM does this) | |
| 2288 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
| 2289 | |
| 2290 // Return number of classes in the inner classes attribute table | |
| 2291 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2292 ClassFileStream* cfs = stream(); | |
| 2293 cfs->guarantee_more(2, CHECK_0); // length | |
| 2294 u2 length = cfs->get_u2_fast(); | |
| 2295 | |
| 2296 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
| 2297 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
| 2298 typeArrayHandle inner_classes(THREAD, ic); | |
| 2299 int index = 0; | |
| 2300 int cp_size = cp->length(); | |
| 2301 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
| 2302 for (int n = 0; n < length; n++) { | |
| 2303 // Inner class index | |
| 2304 u2 inner_class_info_index = cfs->get_u2_fast(); | |
| 2305 check_property( | |
| 2306 inner_class_info_index == 0 || | |
| 2307 (valid_cp_range(inner_class_info_index, cp_size) && | |
|
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|
2308 is_klass_reference(cp, inner_class_info_index)), |
| 0 | 2309 "inner_class_info_index %u has bad constant type in class file %s", |
| 2310 inner_class_info_index, CHECK_0); | |
| 2311 // Outer class index | |
| 2312 u2 outer_class_info_index = cfs->get_u2_fast(); | |
| 2313 check_property( | |
| 2314 outer_class_info_index == 0 || | |
| 2315 (valid_cp_range(outer_class_info_index, cp_size) && | |
|
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2316 is_klass_reference(cp, outer_class_info_index)), |
| 0 | 2317 "outer_class_info_index %u has bad constant type in class file %s", |
| 2318 outer_class_info_index, CHECK_0); | |
| 2319 // Inner class name | |
| 2320 u2 inner_name_index = cfs->get_u2_fast(); | |
| 2321 check_property( | |
| 2322 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
| 2323 cp->tag_at(inner_name_index).is_utf8()), | |
| 2324 "inner_name_index %u has bad constant type in class file %s", | |
| 2325 inner_name_index, CHECK_0); | |
| 2326 if (_need_verify) { | |
| 2327 guarantee_property(inner_class_info_index != outer_class_info_index, | |
| 2328 "Class is both outer and inner class in class file %s", CHECK_0); | |
| 2329 } | |
| 2330 // Access flags | |
| 2331 AccessFlags inner_access_flags; | |
| 2332 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
| 2333 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2334 // Set abstract bit for old class files for backward compatibility | |
| 2335 flags |= JVM_ACC_ABSTRACT; | |
| 2336 } | |
| 2337 verify_legal_class_modifiers(flags, CHECK_0); | |
| 2338 inner_access_flags.set_flags(flags); | |
| 2339 | |
| 2340 inner_classes->short_at_put(index++, inner_class_info_index); | |
| 2341 inner_classes->short_at_put(index++, outer_class_info_index); | |
| 2342 inner_classes->short_at_put(index++, inner_name_index); | |
| 2343 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
| 2344 } | |
| 2345 | |
| 2346 // 4347400: make sure there's no duplicate entry in the classes array | |
| 2347 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2348 for(int i = 0; i < inner_classes->length(); i += 4) { | |
| 2349 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
| 2350 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
| 2351 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
| 2352 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
| 2353 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
| 2354 "Duplicate entry in InnerClasses in class file %s", | |
| 2355 CHECK_0); | |
| 2356 } | |
| 2357 } | |
| 2358 } | |
| 2359 | |
| 2360 // Update instanceKlass with inner class info. | |
| 2361 k->set_inner_classes(inner_classes()); | |
| 2362 return length; | |
| 2363 } | |
| 2364 | |
| 2365 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2366 k->set_is_synthetic(); | |
| 2367 } | |
| 2368 | |
| 2369 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2370 ClassFileStream* cfs = stream(); | |
| 2371 u2 signature_index = cfs->get_u2(CHECK); | |
| 2372 check_property( | |
| 2373 valid_cp_range(signature_index, cp->length()) && | |
| 2374 cp->tag_at(signature_index).is_utf8(), | |
| 2375 "Invalid constant pool index %u in Signature attribute in class file %s", | |
| 2376 signature_index, CHECK); | |
| 2377 k->set_generic_signature(cp->symbol_at(signature_index)); | |
| 2378 } | |
| 2379 | |
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2380 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k, |
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2381 u4 attribute_byte_length, TRAPS) { |
|
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2382 ClassFileStream* cfs = stream(); |
|
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2383 u1* current_start = cfs->current(); |
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|
2384 |
|
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|
2385 cfs->guarantee_more(2, CHECK); // length |
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|
2386 int attribute_array_length = cfs->get_u2_fast(); |
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|
2387 |
|
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|
2388 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length, |
|
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|
2389 "Short length on BootstrapMethods in class file %s", |
|
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|
2390 CHECK); |
|
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|
2391 |
|
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2392 // The attribute contains a counted array of counted tuples of shorts, |
|
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|
2393 // represending bootstrap specifiers: |
|
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|
2394 // length*{bootstrap_method_index, argument_count*{argument_index}} |
|
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2395 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2); |
|
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2396 // operand_count = number of shorts in attr, except for leading length |
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2397 |
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|
2398 // The attribute is copied into a short[] array. |
|
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2399 // The array begins with a series of short[2] pairs, one for each tuple. |
|
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2400 int index_size = (attribute_array_length * 2); |
|
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2401 |
|
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|
2402 typeArrayOop operands_oop = oopFactory::new_permanent_intArray(index_size + operand_count, CHECK); |
|
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|
2403 typeArrayHandle operands(THREAD, operands_oop); |
|
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|
2404 operands_oop = NULL; // tidy |
|
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|
2405 |
|
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|
2406 int operand_fill_index = index_size; |
|
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diff
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|
2407 int cp_size = cp->length(); |
|
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|
2408 |
|
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diff
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|
2409 for (int n = 0; n < attribute_array_length; n++) { |
|
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diff
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|
2410 // Store a 32-bit offset into the header of the operand array. |
|
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diff
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|
2411 assert(constantPoolOopDesc::operand_offset_at(operands(), n) == 0, ""); |
|
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diff
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|
2412 constantPoolOopDesc::operand_offset_at_put(operands(), n, operand_fill_index); |
|
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|
2413 |
|
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diff
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|
2414 // Read a bootstrap specifier. |
|
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diff
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|
2415 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc |
|
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diff
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|
2416 u2 bootstrap_method_index = cfs->get_u2_fast(); |
|
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|
2417 u2 argument_count = cfs->get_u2_fast(); |
|
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|
2418 check_property( |
|
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|
2419 valid_cp_range(bootstrap_method_index, cp_size) && |
|
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diff
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|
2420 cp->tag_at(bootstrap_method_index).is_method_handle(), |
|
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diff
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|
2421 "bootstrap_method_index %u has bad constant type in class file %s", |
| 2085 | 2422 bootstrap_method_index, |
|
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|
2423 CHECK); |
|
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|
2424 operands->short_at_put(operand_fill_index++, bootstrap_method_index); |
|
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|
2425 operands->short_at_put(operand_fill_index++, argument_count); |
|
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|
2426 |
|
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diff
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|
2427 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc] |
|
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|
2428 for (int j = 0; j < argument_count; j++) { |
| 2085 | 2429 u2 argument_index = cfs->get_u2_fast(); |
|
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|
2430 check_property( |
| 2085 | 2431 valid_cp_range(argument_index, cp_size) && |
| 2432 cp->tag_at(argument_index).is_loadable_constant(), | |
|
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|
2433 "argument_index %u has bad constant type in class file %s", |
| 2085 | 2434 argument_index, |
|
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|
2435 CHECK); |
| 2085 | 2436 operands->short_at_put(operand_fill_index++, argument_index); |
|
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|
2437 } |
|
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|
2438 } |
|
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|
2439 |
|
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|
2440 assert(operand_fill_index == operands()->length(), "exact fill"); |
|
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diff
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|
2441 assert(constantPoolOopDesc::operand_array_length(operands()) == attribute_array_length, "correct decode"); |
|
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|
2442 |
|
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diff
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|
2443 u1* current_end = cfs->current(); |
|
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diff
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|
2444 guarantee_property(current_end == current_start + attribute_byte_length, |
|
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diff
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|
2445 "Bad length on BootstrapMethods in class file %s", |
|
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diff
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|
2446 CHECK); |
|
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diff
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|
2447 |
|
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diff
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|
2448 cp->set_operands(operands()); |
|
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diff
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|
2449 } |
|
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|
2450 |
|
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|
2451 |
| 0 | 2452 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { |
| 2453 ClassFileStream* cfs = stream(); | |
| 2454 // Set inner classes attribute to default sentinel | |
| 2455 k->set_inner_classes(Universe::the_empty_short_array()); | |
| 2456 cfs->guarantee_more(2, CHECK); // attributes_count | |
| 2457 u2 attributes_count = cfs->get_u2_fast(); | |
| 2458 bool parsed_sourcefile_attribute = false; | |
| 2459 bool parsed_innerclasses_attribute = false; | |
| 2460 bool parsed_enclosingmethod_attribute = false; | |
|
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|
2461 bool parsed_bootstrap_methods_attribute = false; |
| 0 | 2462 u1* runtime_visible_annotations = NULL; |
| 2463 int runtime_visible_annotations_length = 0; | |
| 2464 u1* runtime_invisible_annotations = NULL; | |
| 2465 int runtime_invisible_annotations_length = 0; | |
| 2466 // Iterate over attributes | |
| 2467 while (attributes_count--) { | |
| 2468 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 2469 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 2470 u4 attribute_length = cfs->get_u4_fast(); | |
| 2471 check_property( | |
| 2472 valid_cp_range(attribute_name_index, cp->length()) && | |
| 2473 cp->tag_at(attribute_name_index).is_utf8(), | |
| 2474 "Attribute name has bad constant pool index %u in class file %s", | |
| 2475 attribute_name_index, CHECK); | |
|
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diff
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|
2476 Symbol* tag = cp->symbol_at(attribute_name_index); |
| 0 | 2477 if (tag == vmSymbols::tag_source_file()) { |
| 2478 // Check for SourceFile tag | |
| 2479 if (_need_verify) { | |
| 2480 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
| 2481 } | |
| 2482 if (parsed_sourcefile_attribute) { | |
| 2483 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
| 2484 } else { | |
| 2485 parsed_sourcefile_attribute = true; | |
| 2486 } | |
| 2487 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
| 2488 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
| 2489 // Check for SourceDebugExtension tag | |
| 2490 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
| 2491 } else if (tag == vmSymbols::tag_inner_classes()) { | |
| 2492 // Check for InnerClasses tag | |
| 2493 if (parsed_innerclasses_attribute) { | |
| 2494 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
| 2495 } else { | |
| 2496 parsed_innerclasses_attribute = true; | |
| 2497 } | |
| 2498 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
| 2499 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2500 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
| 2501 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
| 2502 } | |
| 2503 } else if (tag == vmSymbols::tag_synthetic()) { | |
| 2504 // Check for Synthetic tag | |
| 2505 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
| 2506 if (attribute_length != 0) { | |
| 2507 classfile_parse_error( | |
| 2508 "Invalid Synthetic classfile attribute length %u in class file %s", | |
| 2509 attribute_length, CHECK); | |
| 2510 } | |
| 2511 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
| 2512 } else if (tag == vmSymbols::tag_deprecated()) { | |
| 2513 // Check for Deprecatd tag - 4276120 | |
| 2514 if (attribute_length != 0) { | |
| 2515 classfile_parse_error( | |
| 2516 "Invalid Deprecated classfile attribute length %u in class file %s", | |
| 2517 attribute_length, CHECK); | |
| 2518 } | |
| 2519 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 2520 if (tag == vmSymbols::tag_signature()) { | |
| 2521 if (attribute_length != 2) { | |
| 2522 classfile_parse_error( | |
| 2523 "Wrong Signature attribute length %u in class file %s", | |
| 2524 attribute_length, CHECK); | |
| 2525 } | |
| 2526 parse_classfile_signature_attribute(cp, k, CHECK); | |
| 2527 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
| 2528 runtime_visible_annotations_length = attribute_length; | |
| 2529 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 2530 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 2531 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 2532 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 2533 runtime_invisible_annotations_length = attribute_length; | |
| 2534 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 2535 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 2536 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 2537 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
| 2538 if (parsed_enclosingmethod_attribute) { | |
| 2539 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
| 2540 } else { | |
| 2541 parsed_enclosingmethod_attribute = true; | |
| 2542 } | |
| 2543 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
| 2544 u2 class_index = cfs->get_u2_fast(); | |
| 2545 u2 method_index = cfs->get_u2_fast(); | |
| 2546 if (class_index == 0) { | |
| 2547 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2548 } | |
| 2549 // Validate the constant pool indices and types | |
| 2550 if (!cp->is_within_bounds(class_index) || | |
|
431
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
196
diff
changeset
|
2551 !is_klass_reference(cp, class_index)) { |
| 0 | 2552 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); |
| 2553 } | |
| 2554 if (method_index != 0 && | |
| 2555 (!cp->is_within_bounds(method_index) || | |
| 2556 !cp->tag_at(method_index).is_name_and_type())) { | |
| 2557 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2558 } | |
| 2559 k->set_enclosing_method_indices(class_index, method_index); | |
|
2011
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
2560 } else if (tag == vmSymbols::tag_bootstrap_methods() && |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
2561 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
2562 if (parsed_bootstrap_methods_attribute) |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
2563 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK); |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
2564 parsed_bootstrap_methods_attribute = true; |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
2565 parse_classfile_bootstrap_methods_attribute(cp, k, attribute_length, CHECK); |
| 0 | 2566 } else { |
| 2567 // Unknown attribute | |
| 2568 cfs->skip_u1(attribute_length, CHECK); | |
| 2569 } | |
| 2570 } else { | |
| 2571 // Unknown attribute | |
| 2572 cfs->skip_u1(attribute_length, CHECK); | |
| 2573 } | |
| 2574 } | |
| 2575 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
| 2576 runtime_visible_annotations_length, | |
| 2577 runtime_invisible_annotations, | |
| 2578 runtime_invisible_annotations_length, | |
| 2579 CHECK); | |
| 2580 k->set_class_annotations(annotations()); | |
|
2011
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
2581 |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
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1972
diff
changeset
|
2582 if (_max_bootstrap_specifier_index >= 0) { |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
2583 guarantee_property(parsed_bootstrap_methods_attribute, |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
2584 "Missing BootstrapMethods attribute in class file %s", CHECK); |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
1972
diff
changeset
|
2585 } |
| 0 | 2586 } |
| 2587 | |
| 2588 | |
| 2589 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
| 2590 int runtime_visible_annotations_length, | |
| 2591 u1* runtime_invisible_annotations, | |
| 2592 int runtime_invisible_annotations_length, TRAPS) { | |
| 2593 typeArrayHandle annotations; | |
| 2594 if (runtime_visible_annotations != NULL || | |
| 2595 runtime_invisible_annotations != NULL) { | |
| 2596 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
| 2597 runtime_invisible_annotations_length, CHECK_(annotations)); | |
| 2598 annotations = typeArrayHandle(THREAD, anno); | |
| 2599 if (runtime_visible_annotations != NULL) { | |
| 2600 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
| 2601 } | |
| 2602 if (runtime_invisible_annotations != NULL) { | |
| 2603 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
| 2604 } | |
| 2605 } | |
| 2606 return annotations; | |
| 2607 } | |
| 2608 | |
| 2609 | |
| 2610 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
| 2611 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2612 // This code is for compatibility with earlier jdk's that do not | |
| 2613 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
| 2614 // the check for the "discovered" field should issue a warning if | |
| 2615 // the field is not found. For 1.6 this code should be issue a | |
| 2616 // fatal error if the "discovered" field is not found. | |
| 2617 // | |
| 2618 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2619 // next type of non-static oops leaves room for the fake oop. | |
| 2620 // Do not increment next_nonstatic_oop_offset so that the | |
| 2621 // fake oop is place after the java.lang.ref.Reference oop | |
| 2622 // fields. | |
| 2623 // | |
| 2624 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2625 // field. If it is not present, artifically create a field for it. | |
| 2626 // This allows this VM to run on early JDK where the field is not | |
| 2627 // present. | |
| 2628 int reference_sig_index = 0; | |
| 2629 int reference_name_index = 0; | |
| 2630 int reference_index = 0; | |
| 2631 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
| 2632 const int n = (*fields_ptr)()->length(); | |
| 2633 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
| 2634 int name_index = | |
| 2635 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
| 2636 int sig_index = | |
| 2637 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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2085
diff
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|
2638 Symbol* f_name = cp->symbol_at(name_index); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2085
diff
changeset
|
2639 Symbol* f_sig = cp->symbol_at(sig_index); |
| 0 | 2640 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { |
| 2641 // Save the index for reference signature for later use. | |
| 2642 // The fake discovered field does not entries in the | |
| 2643 // constant pool so the index for its signature cannot | |
| 2644 // be extracted from the constant pool. It will need | |
| 2645 // later, however. It's signature is vmSymbols::reference_signature() | |
| 2646 // so same an index for that signature. | |
| 2647 reference_sig_index = sig_index; | |
| 2648 reference_name_index = name_index; | |
| 2649 reference_index = i; | |
| 2650 } | |
| 2651 if (f_name == vmSymbols::reference_discovered_name() && | |
| 2652 f_sig == vmSymbols::reference_signature()) { | |
| 2653 // The values below are fake but will force extra | |
| 2654 // non-static oop fields and a corresponding non-static | |
| 2655 // oop map block to be allocated. | |
| 2656 extra = 0; | |
| 2657 break; | |
| 2658 } | |
| 2659 } | |
| 2660 if (extra != 0) { | |
| 2661 fac_ptr->nonstatic_oop_count += extra; | |
| 2662 // Add the additional entry to "fields" so that the klass | |
| 2663 // contains the "discoverd" field and the field will be initialized | |
| 2664 // in instances of the object. | |
| 2665 int fields_with_fix_length = (*fields_ptr)()->length() + | |
| 2666 instanceKlass::next_offset; | |
| 2667 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
| 2668 fields_with_fix_length, CHECK); | |
| 2669 typeArrayHandle fields_with_fix(THREAD, ff); | |
| 2670 | |
| 2671 // Take everything from the original but the length. | |
| 2672 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
| 2673 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
| 2674 } | |
| 2675 | |
| 2676 // Add the fake field at the end. | |
| 2677 int i = (*fields_ptr)->length(); | |
| 2678 // There is no name index for the fake "discovered" field nor | |
| 2679 // signature but a signature is needed so that the field will | |
| 2680 // be properly initialized. Use one found for | |
| 2681 // one of the other reference fields. Be sure the index for the | |
| 2682 // name is 0. In fieldDescriptor::initialize() the index of the | |
| 2683 // name is checked. That check is by passed for the last nonstatic | |
| 2684 // oop field in a java.lang.ref.Reference which is assumed to be | |
| 2685 // this artificial "discovered" field. An assertion checks that | |
| 2686 // the name index is 0. | |
| 2687 assert(reference_index != 0, "Missing signature for reference"); | |
| 2688 | |
| 2689 int j; | |
| 2690 for (j = 0; j < instanceKlass::next_offset; j++) { | |
| 2691 fields_with_fix->ushort_at_put(i + j, | |
| 2692 (*fields_ptr)->ushort_at(reference_index +j)); | |
| 2693 } | |
| 2694 // Clear the public access flag and set the private access flag. | |
| 2695 short flags; | |
| 2696 flags = | |
| 2697 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
| 2698 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
| 2699 flags = flags & (~JVM_ACC_PUBLIC); | |
| 2700 flags = flags | JVM_ACC_PRIVATE; | |
| 2701 AccessFlags access_flags; | |
| 2702 access_flags.set_flags(flags); | |
| 2703 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
| 2704 assert(access_flags.is_private(), "Failed to set private flag"); | |
| 2705 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
| 2706 flags); | |
| 2707 | |
| 2708 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
| 2709 == reference_name_index, "The fake reference name is incorrect"); | |
| 2710 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
| 2711 == reference_sig_index, "The fake reference signature is incorrect"); | |
| 2712 // The type of the field is stored in the low_offset entry during | |
| 2713 // parsing. | |
| 2714 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
| 2715 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
| 2716 | |
| 2717 // "fields" is allocated in the permanent generation. Disgard | |
| 2718 // it and let it be collected. | |
| 2719 (*fields_ptr) = fields_with_fix; | |
| 2720 } | |
| 2721 return; | |
| 2722 } | |
| 2723 | |
| 2724 | |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2725 void ClassFileParser::java_lang_Class_fix_pre(int* nonstatic_field_size, |
|
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2726 FieldAllocationCount *fac_ptr) { |
| 0 | 2727 // Add fake fields for java.lang.Class instances |
| 2728 // | |
| 2729 // This is not particularly nice. We should consider adding a | |
| 2730 // private transient object field at the Java level to | |
| 2731 // java.lang.Class. Alternatively we could add a subclass of | |
| 2732 // instanceKlass which provides an accessor and size computer for | |
| 2733 // this field, but that appears to be more code than this hack. | |
| 2734 // | |
| 2735 // NOTE that we wedge these in at the beginning rather than the | |
| 2736 // end of the object because the Class layout changed between JDK | |
| 2737 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
| 2738 // nonstatic oop fields were added at the Java level. The offsets | |
| 2739 // of these fake fields can't change between these two JDK | |
| 2740 // versions because when the offsets are computed at bootstrap | |
| 2741 // time we don't know yet which version of the JDK we're running in. | |
| 2742 | |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2743 // The values below are fake but will force three non-static oop fields and |
| 0 | 2744 // a corresponding non-static oop map block to be allocated. |
| 2745 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
| 2746 fac_ptr->nonstatic_oop_count += extra; | |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2747 |
|
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2748 // Reserve some leading space for fake ints |
|
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2749 *nonstatic_field_size += align_size_up(java_lang_Class::hc_number_of_fake_int_fields * BytesPerInt, heapOopSize) / heapOopSize; |
| 0 | 2750 } |
| 2751 | |
| 2752 | |
| 2753 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
| 2754 // Cause the extra fake fields in java.lang.Class to show up before | |
| 2755 // the Java fields for layout compatibility between 1.3 and 1.4 | |
| 2756 // Incrementing next_nonstatic_oop_offset here advances the | |
| 2757 // location where the real java fields are placed. | |
| 2758 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
92
diff
changeset
|
2759 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
| 0 | 2760 } |
| 2761 | |
| 2762 | |
| 710 | 2763 // Force MethodHandle.vmentry to be an unmanaged pointer. |
| 2764 // There is no way for a classfile to express this, so we must help it. | |
|
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2356
diff
changeset
|
2765 void ClassFileParser::java_lang_invoke_MethodHandle_fix_pre(constantPoolHandle cp, |
|
1909
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2766 typeArrayHandle fields, |
| 710 | 2767 FieldAllocationCount *fac_ptr, |
| 2768 TRAPS) { | |
|
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2356
diff
changeset
|
2769 // Add fake fields for java.lang.invoke.MethodHandle instances |
| 710 | 2770 // |
| 2771 // This is not particularly nice, but since there is no way to express | |
| 2772 // a native wordSize field in Java, we must do it at this level. | |
| 2773 | |
| 2774 if (!EnableMethodHandles) return; | |
| 2775 | |
| 2776 int word_sig_index = 0; | |
| 2777 const int cp_size = cp->length(); | |
| 2778 for (int index = 1; index < cp_size; index++) { | |
| 2779 if (cp->tag_at(index).is_utf8() && | |
| 2780 cp->symbol_at(index) == vmSymbols::machine_word_signature()) { | |
| 2781 word_sig_index = index; | |
| 2782 break; | |
| 2783 } | |
| 2784 } | |
| 2785 | |
|
2356
72dee110246f
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
2334
diff
changeset
|
2786 if (AllowTransitionalJSR292 && word_sig_index == 0) return; |
| 710 | 2787 if (word_sig_index == 0) |
| 2788 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
|
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2356
diff
changeset
|
2789 "missing I or J signature (for vmentry) in java.lang.invoke.MethodHandle"); |
| 710 | 2790 |
|
1909
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2791 // Find vmentry field and change the signature. |
| 710 | 2792 bool found_vmentry = false; |
|
1909
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
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1847
diff
changeset
|
2793 for (int i = 0; i < fields->length(); i += instanceKlass::next_offset) { |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2794 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2795 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2796 int acc_flags = fields->ushort_at(i + instanceKlass::access_flags_offset); |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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2085
diff
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|
2797 Symbol* f_name = cp->symbol_at(name_index); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2085
diff
changeset
|
2798 Symbol* f_sig = cp->symbol_at(sig_index); |
|
1909
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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1847
diff
changeset
|
2799 if (f_name == vmSymbols::vmentry_name() && (acc_flags & JVM_ACC_STATIC) == 0) { |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2800 if (f_sig == vmSymbols::machine_word_signature()) { |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2801 // If the signature of vmentry is already changed, we're done. |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2802 found_vmentry = true; |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2803 break; |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2804 } |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2805 else if (f_sig == vmSymbols::byte_signature()) { |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2806 // Adjust the field type from byte to an unmanaged pointer. |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2807 assert(fac_ptr->nonstatic_byte_count > 0, ""); |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2808 fac_ptr->nonstatic_byte_count -= 1; |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2809 |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2810 fields->ushort_at_put(i + instanceKlass::signature_index_offset, word_sig_index); |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
twisti
parents:
1847
diff
changeset
|
2811 assert(wordSize == longSize || wordSize == jintSize, "ILP32 or LP64"); |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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diff
changeset
|
2812 if (wordSize == longSize) fac_ptr->nonstatic_double_count += 1; |
|
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changeset
|
2813 else fac_ptr->nonstatic_word_count += 1; |
|
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|
2814 |
|
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|
2815 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset); |
|
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|
2816 assert(atype == NONSTATIC_BYTE, ""); |
|
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|
2817 FieldAllocationType new_atype = (wordSize == longSize) ? NONSTATIC_DOUBLE : NONSTATIC_WORD; |
|
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|
2818 fields->ushort_at_put(i + instanceKlass::low_offset, new_atype); |
|
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|
2819 |
|
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|
2820 found_vmentry = true; |
|
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|
2821 break; |
|
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|
2822 } |
| 710 | 2823 } |
| 2824 } | |
| 2825 | |
|
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72dee110246f
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diff
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|
2826 if (AllowTransitionalJSR292 && !found_vmentry) return; |
| 710 | 2827 if (!found_vmentry) |
| 2828 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
|
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7012648: move JSR 292 to package java.lang.invoke and adjust names
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|
2829 "missing vmentry byte field in java.lang.invoke.MethodHandle"); |
| 710 | 2830 } |
| 2831 | |
| 2832 | |
|
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|
2833 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name, |
| 0 | 2834 Handle class_loader, |
| 2835 Handle protection_domain, | |
| 710 | 2836 KlassHandle host_klass, |
|
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|
2837 GrowableArray<Handle>* cp_patches, |
|
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|
2838 TempNewSymbol& parsed_name, |
|
973
ad6585fd4087
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diff
changeset
|
2839 bool verify, |
| 0 | 2840 TRAPS) { |
| 2841 // So that JVMTI can cache class file in the state before retransformable agents | |
| 2842 // have modified it | |
| 2843 unsigned char *cached_class_file_bytes = NULL; | |
| 2844 jint cached_class_file_length; | |
| 2845 | |
| 2846 ClassFileStream* cfs = stream(); | |
| 2847 // Timing | |
|
875
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|
2848 assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
|
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6857194: Add hotspot perf counters to aid class loading performance measurement
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|
2849 JavaThread* jt = (JavaThread*) THREAD; |
|
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6857194: Add hotspot perf counters to aid class loading performance measurement
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|
2850 |
|
6a93908f268f
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|
2851 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(), |
|
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
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|
2852 ClassLoader::perf_class_parse_selftime(), |
|
6a93908f268f
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|
2853 NULL, |
|
6a93908f268f
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diff
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|
2854 jt->get_thread_stat()->perf_recursion_counts_addr(), |
|
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
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|
2855 jt->get_thread_stat()->perf_timers_addr(), |
|
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6857194: Add hotspot perf counters to aid class loading performance measurement
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diff
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|
2856 PerfClassTraceTime::PARSE_CLASS); |
| 0 | 2857 |
| 2858 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
|
2011
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7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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1972
diff
changeset
|
2859 _max_bootstrap_specifier_index = -1; |
| 0 | 2860 |
| 2861 if (JvmtiExport::should_post_class_file_load_hook()) { | |
| 2862 unsigned char* ptr = cfs->buffer(); | |
| 2863 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
| 2864 | |
| 2865 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
| 2866 &ptr, &end_ptr, | |
| 2867 &cached_class_file_bytes, | |
| 2868 &cached_class_file_length); | |
| 2869 | |
| 2870 if (ptr != cfs->buffer()) { | |
| 2871 // JVMTI agent has modified class file data. | |
| 2872 // Set new class file stream using JVMTI agent modified | |
| 2873 // class file data. | |
| 2874 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
| 2875 set_stream(cfs); | |
| 2876 } | |
| 2877 } | |
| 2878 | |
| 710 | 2879 _host_klass = host_klass; |
|
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|
2880 _cp_patches = cp_patches; |
| 0 | 2881 |
| 2882 instanceKlassHandle nullHandle; | |
| 2883 | |
| 2884 // Figure out whether we can skip format checking (matching classic VM behavior) | |
|
973
ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
acorn
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879
diff
changeset
|
2885 _need_verify = Verifier::should_verify_for(class_loader(), verify); |
| 0 | 2886 |
| 2887 // Set the verify flag in stream | |
| 2888 cfs->set_verify(_need_verify); | |
| 2889 | |
| 2890 // Save the class file name for easier error message printing. | |
|
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6990754: Use native memory and reference counting to implement SymbolTable
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|
2891 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name(); |
| 0 | 2892 |
| 2893 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
| 2894 // Magic value | |
| 2895 u4 magic = cfs->get_u4_fast(); | |
| 2896 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
| 2897 "Incompatible magic value %u in class file %s", | |
| 2898 magic, CHECK_(nullHandle)); | |
| 2899 | |
| 2900 // Version numbers | |
| 2901 u2 minor_version = cfs->get_u2_fast(); | |
| 2902 u2 major_version = cfs->get_u2_fast(); | |
| 2903 | |
| 2904 // Check version numbers - we check this even with verifier off | |
| 2905 if (!is_supported_version(major_version, minor_version)) { | |
|
2177
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|
2906 if (name == NULL) { |
| 0 | 2907 Exceptions::fthrow( |
| 2908 THREAD_AND_LOCATION, | |
|
2177
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|
2909 vmSymbols::java_lang_UnsupportedClassVersionError(), |
| 0 | 2910 "Unsupported major.minor version %u.%u", |
| 2911 major_version, | |
| 2912 minor_version); | |
| 2913 } else { | |
| 2914 ResourceMark rm(THREAD); | |
| 2915 Exceptions::fthrow( | |
| 2916 THREAD_AND_LOCATION, | |
|
2177
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|
2917 vmSymbols::java_lang_UnsupportedClassVersionError(), |
| 0 | 2918 "%s : Unsupported major.minor version %u.%u", |
| 2919 name->as_C_string(), | |
| 2920 major_version, | |
| 2921 minor_version); | |
| 2922 } | |
| 2923 return nullHandle; | |
| 2924 } | |
| 2925 | |
| 2926 _major_version = major_version; | |
| 2927 _minor_version = minor_version; | |
| 2928 | |
| 2929 | |
| 2930 // Check if verification needs to be relaxed for this class file | |
| 2931 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
| 2932 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
| 2933 | |
| 2934 // Constant pool | |
| 2935 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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2085
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changeset
|
2936 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up. |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2085
diff
changeset
|
2937 |
| 0 | 2938 int cp_size = cp->length(); |
| 2939 | |
| 2940 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
| 2941 | |
| 2942 // Access flags | |
| 2943 AccessFlags access_flags; | |
| 2944 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
| 2945 | |
| 2946 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2947 // Set abstract bit for old class files for backward compatibility | |
| 2948 flags |= JVM_ACC_ABSTRACT; | |
| 2949 } | |
| 2950 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
| 2951 access_flags.set_flags(flags); | |
| 2952 | |
| 2953 // This class and superclass | |
| 2954 instanceKlassHandle super_klass; | |
| 2955 u2 this_class_index = cfs->get_u2_fast(); | |
| 2956 check_property( | |
| 2957 valid_cp_range(this_class_index, cp_size) && | |
| 2958 cp->tag_at(this_class_index).is_unresolved_klass(), | |
| 2959 "Invalid this class index %u in constant pool in class file %s", | |
| 2960 this_class_index, CHECK_(nullHandle)); | |
| 2961 | |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2085
diff
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|
2962 Symbol* class_name = cp->unresolved_klass_at(this_class_index); |
|
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6990754: Use native memory and reference counting to implement SymbolTable
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parents:
2085
diff
changeset
|
2963 assert(class_name != NULL, "class_name can't be null"); |
| 0 | 2964 |
| 2965 // It's important to set parsed_name *before* resolving the super class. | |
| 2966 // (it's used for cleanup by the caller if parsing fails) | |
| 2967 parsed_name = class_name; | |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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2085
diff
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|
2968 // parsed_name is returned and can be used if there's an error, so add to |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2085
diff
changeset
|
2969 // its reference count. Caller will decrement the refcount. |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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2085
diff
changeset
|
2970 parsed_name->increment_refcount(); |
| 0 | 2971 |
| 2972 // Update _class_name which could be null previously to be class_name | |
| 2973 _class_name = class_name; | |
| 2974 | |
| 2975 // Don't need to check whether this class name is legal or not. | |
| 2976 // It has been checked when constant pool is parsed. | |
| 2977 // However, make sure it is not an array type. | |
| 2978 if (_need_verify) { | |
| 2979 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 2980 "Bad class name in class file %s", | |
| 2981 CHECK_(nullHandle)); | |
| 2982 } | |
| 2983 | |
| 2984 klassOop preserve_this_klass; // for storing result across HandleMark | |
| 2985 | |
| 2986 // release all handles when parsing is done | |
| 2987 { HandleMark hm(THREAD); | |
| 2988 | |
| 2989 // Checks if name in class file matches requested name | |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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2085
diff
changeset
|
2990 if (name != NULL && class_name != name) { |
| 0 | 2991 ResourceMark rm(THREAD); |
| 2992 Exceptions::fthrow( | |
| 2993 THREAD_AND_LOCATION, | |
|
2177
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2085
diff
changeset
|
2994 vmSymbols::java_lang_NoClassDefFoundError(), |
| 0 | 2995 "%s (wrong name: %s)", |
| 2996 name->as_C_string(), | |
| 2997 class_name->as_C_string() | |
| 2998 ); | |
| 2999 return nullHandle; | |
| 3000 } | |
| 3001 | |
| 3002 if (TraceClassLoadingPreorder) { | |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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2085
diff
changeset
|
3003 tty->print("[Loading %s", name->as_klass_external_name()); |
| 0 | 3004 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); |
| 3005 tty->print_cr("]"); | |
| 3006 } | |
| 3007 | |
| 3008 u2 super_class_index = cfs->get_u2_fast(); | |
| 3009 if (super_class_index == 0) { | |
|
2177
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2085
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changeset
|
3010 check_property(class_name == vmSymbols::java_lang_Object(), |
| 0 | 3011 "Invalid superclass index %u in class file %s", |
| 3012 super_class_index, | |
| 3013 CHECK_(nullHandle)); | |
| 3014 } else { | |
| 3015 check_property(valid_cp_range(super_class_index, cp_size) && | |
|
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|
3016 is_klass_reference(cp, super_class_index), |
| 0 | 3017 "Invalid superclass index %u in class file %s", |
| 3018 super_class_index, | |
| 3019 CHECK_(nullHandle)); | |
| 3020 // The class name should be legal because it is checked when parsing constant pool. | |
| 3021 // However, make sure it is not an array type. | |
|
431
a45484ea312d
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|
3022 bool is_array = false; |
|
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|
3023 if (cp->tag_at(super_class_index).is_klass()) { |
|
a45484ea312d
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|
3024 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index)); |
|
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|
3025 if (_need_verify) |
|
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|
3026 is_array = super_klass->oop_is_array(); |
|
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diff
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|
3027 } else if (_need_verify) { |
|
a45484ea312d
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diff
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|
3028 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); |
|
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|
3029 } |
| 0 | 3030 if (_need_verify) { |
|
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|
3031 guarantee_property(!is_array, |
| 0 | 3032 "Bad superclass name in class file %s", CHECK_(nullHandle)); |
| 3033 } | |
| 3034 } | |
| 3035 | |
| 3036 // Interfaces | |
| 3037 u2 itfs_len = cfs->get_u2_fast(); | |
| 3038 objArrayHandle local_interfaces; | |
| 3039 if (itfs_len == 0) { | |
| 3040 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 3041 } else { | |
|
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6857194: Add hotspot perf counters to aid class loading performance measurement
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|
3042 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle)); |
| 0 | 3043 } |
| 3044 | |
| 3045 // Fields (offsets are filled in later) | |
| 3046 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
| 3047 objArrayHandle fields_annotations; | |
| 3048 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
| 3049 // Methods | |
| 3050 bool has_final_method = false; | |
| 3051 AccessFlags promoted_flags; | |
| 3052 promoted_flags.set_flags(0); | |
| 3053 // These need to be oop pointers because they are allocated lazily | |
| 3054 // inside parse_methods inside a nested HandleMark | |
| 3055 objArrayOop methods_annotations_oop = NULL; | |
| 3056 objArrayOop methods_parameter_annotations_oop = NULL; | |
| 3057 objArrayOop methods_default_annotations_oop = NULL; | |
| 3058 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
| 3059 &promoted_flags, | |
| 3060 &has_final_method, | |
| 3061 &methods_annotations_oop, | |
| 3062 &methods_parameter_annotations_oop, | |
| 3063 &methods_default_annotations_oop, | |
| 3064 CHECK_(nullHandle)); | |
| 3065 | |
| 3066 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
| 3067 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
| 3068 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
| 3069 | |
| 3070 // We check super class after class file is parsed and format is checked | |
|
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|
3071 if (super_class_index > 0 && super_klass.is_null()) { |
|
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|
3072 Symbol* sk = cp->klass_name_at(super_class_index); |
| 0 | 3073 if (access_flags.is_interface()) { |
| 3074 // Before attempting to resolve the superclass, check for class format | |
| 3075 // errors not checked yet. | |
|
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|
3076 guarantee_property(sk == vmSymbols::java_lang_Object(), |
| 0 | 3077 "Interfaces must have java.lang.Object as superclass in class file %s", |
| 3078 CHECK_(nullHandle)); | |
| 3079 } | |
| 3080 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
| 3081 sk, | |
| 3082 class_loader, | |
| 3083 protection_domain, | |
| 3084 true, | |
| 3085 CHECK_(nullHandle)); | |
|
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|
3086 |
| 0 | 3087 KlassHandle kh (THREAD, k); |
| 3088 super_klass = instanceKlassHandle(THREAD, kh()); | |
|
474
7a018855d2f0
6779339: turn off LinkWellKnownClasses by default pending further testing
jrose
parents:
431
diff
changeset
|
3089 if (LinkWellKnownClasses) // my super class is well known to me |
|
7a018855d2f0
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431
diff
changeset
|
3090 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve |
|
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|
3091 } |
|
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|
3092 if (super_klass.not_null()) { |
| 0 | 3093 if (super_klass->is_interface()) { |
| 3094 ResourceMark rm(THREAD); | |
| 3095 Exceptions::fthrow( | |
| 3096 THREAD_AND_LOCATION, | |
|
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|
3097 vmSymbols::java_lang_IncompatibleClassChangeError(), |
| 0 | 3098 "class %s has interface %s as super class", |
| 3099 class_name->as_klass_external_name(), | |
| 3100 super_klass->external_name() | |
| 3101 ); | |
| 3102 return nullHandle; | |
| 3103 } | |
| 3104 // Make sure super class is not final | |
| 3105 if (super_klass->is_final()) { | |
| 3106 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
| 3107 } | |
| 3108 } | |
| 3109 | |
| 3110 // Compute the transitive list of all unique interfaces implemented by this class | |
| 3111 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
| 3112 | |
| 3113 // sort methods | |
| 3114 typeArrayHandle method_ordering = sort_methods(methods, | |
| 3115 methods_annotations, | |
| 3116 methods_parameter_annotations, | |
| 3117 methods_default_annotations, | |
| 3118 CHECK_(nullHandle)); | |
| 3119 | |
| 3120 // promote flags from parse_methods() to the klass' flags | |
| 3121 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
| 3122 | |
| 3123 // Size of Java vtable (in words) | |
| 3124 int vtable_size = 0; | |
| 3125 int itable_size = 0; | |
| 3126 int num_miranda_methods = 0; | |
| 3127 | |
| 3128 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
| 3129 num_miranda_methods, | |
| 3130 super_klass(), | |
| 3131 methods(), | |
| 3132 access_flags, | |
|
652
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|
3133 class_loader, |
|
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|
3134 class_name, |
|
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|
3135 local_interfaces(), |
|
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|
3136 CHECK_(nullHandle)); |
| 0 | 3137 |
| 3138 // Size of Java itable (in words) | |
| 3139 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
| 3140 | |
| 3141 // Field size and offset computation | |
| 3142 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
| 3143 #ifndef PRODUCT | |
| 3144 int orig_nonstatic_field_size = 0; | |
| 3145 #endif | |
| 3146 int static_field_size = 0; | |
| 3147 int next_static_oop_offset; | |
| 3148 int next_static_double_offset; | |
| 3149 int next_static_word_offset; | |
| 3150 int next_static_short_offset; | |
| 3151 int next_static_byte_offset; | |
| 3152 int next_static_type_offset; | |
| 3153 int next_nonstatic_oop_offset; | |
| 3154 int next_nonstatic_double_offset; | |
| 3155 int next_nonstatic_word_offset; | |
| 3156 int next_nonstatic_short_offset; | |
| 3157 int next_nonstatic_byte_offset; | |
| 3158 int next_nonstatic_type_offset; | |
| 3159 int first_nonstatic_oop_offset; | |
| 3160 int first_nonstatic_field_offset; | |
| 3161 int next_nonstatic_field_offset; | |
| 3162 | |
| 3163 // Calculate the starting byte offsets | |
|
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|
3164 next_static_oop_offset = instanceMirrorKlass::offset_of_static_fields(); |
| 0 | 3165 next_static_double_offset = next_static_oop_offset + |
|
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|
3166 (fac.static_oop_count * heapOopSize); |
| 0 | 3167 if ( fac.static_double_count && |
| 3168 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
| 3169 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
| 3170 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
| 3171 } | |
| 3172 | |
| 3173 next_static_word_offset = next_static_double_offset + | |
| 3174 (fac.static_double_count * BytesPerLong); | |
| 3175 next_static_short_offset = next_static_word_offset + | |
| 3176 (fac.static_word_count * BytesPerInt); | |
| 3177 next_static_byte_offset = next_static_short_offset + | |
| 3178 (fac.static_short_count * BytesPerShort); | |
| 3179 next_static_type_offset = align_size_up((next_static_byte_offset + | |
| 3180 fac.static_byte_count ), wordSize ); | |
| 3181 static_field_size = (next_static_type_offset - | |
| 3182 next_static_oop_offset) / wordSize; | |
|
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|
3183 |
|
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|
3184 // Add fake fields for java.lang.Class instances (also see below) |
|
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|
3185 if (class_name == vmSymbols::java_lang_Class() && class_loader.is_null()) { |
|
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|
3186 java_lang_Class_fix_pre(&nonstatic_field_size, &fac); |
|
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|
3187 } |
|
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|
3188 |
|
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|
3189 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + |
|
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|
3190 nonstatic_field_size * heapOopSize; |
| 0 | 3191 next_nonstatic_field_offset = first_nonstatic_field_offset; |
| 3192 | |
|
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|
3193 // adjust the vmentry field declaration in java.lang.invoke.MethodHandle |
|
8033953d67ff
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|
3194 if (EnableMethodHandles && class_name == vmSymbols::java_lang_invoke_MethodHandle() && class_loader.is_null()) { |
|
8033953d67ff
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|
3195 java_lang_invoke_MethodHandle_fix_pre(cp, fields, &fac, CHECK_(nullHandle)); |
|
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
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|
3196 } |
|
8033953d67ff
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|
3197 if (AllowTransitionalJSR292 && |
|
8033953d67ff
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|
3198 EnableMethodHandles && class_name == vmSymbols::java_dyn_MethodHandle() && class_loader.is_null()) { |
|
8033953d67ff
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jrose
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diff
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|
3199 java_lang_invoke_MethodHandle_fix_pre(cp, fields, &fac, CHECK_(nullHandle)); |
|
2356
72dee110246f
6839872: remove implementation inheritance from JSR 292 APIs
jrose
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diff
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|
3200 } |
|
72dee110246f
6839872: remove implementation inheritance from JSR 292 APIs
jrose
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2334
diff
changeset
|
3201 if (AllowTransitionalJSR292 && |
|
72dee110246f
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jrose
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diff
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|
3202 EnableMethodHandles && class_name == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) { |
|
72dee110246f
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diff
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|
3203 // allow vmentry field in MethodHandleImpl also |
|
2357
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|
3204 java_lang_invoke_MethodHandle_fix_pre(cp, fields, &fac, CHECK_(nullHandle)); |
| 710 | 3205 } |
| 3206 | |
| 0 | 3207 // Add a fake "discovered" field if it is not present |
| 3208 // for compatibility with earlier jdk's. | |
|
2177
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|
3209 if (class_name == vmSymbols::java_lang_ref_Reference() |
| 0 | 3210 && class_loader.is_null()) { |
| 3211 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
| 3212 } | |
| 3213 // end of "discovered" field compactibility fix | |
| 3214 | |
|
939
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|
3215 unsigned int nonstatic_double_count = fac.nonstatic_double_count; |
|
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|
3216 unsigned int nonstatic_word_count = fac.nonstatic_word_count; |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
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|
3217 unsigned int nonstatic_short_count = fac.nonstatic_short_count; |
|
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|
3218 unsigned int nonstatic_byte_count = fac.nonstatic_byte_count; |
|
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|
3219 unsigned int nonstatic_oop_count = fac.nonstatic_oop_count; |
| 0 | 3220 |
|
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|
3221 bool super_has_nonstatic_fields = |
|
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|
3222 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
|
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|
3223 bool has_nonstatic_fields = super_has_nonstatic_fields || |
|
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|
3224 ((nonstatic_double_count + nonstatic_word_count + |
|
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92
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|
3225 nonstatic_short_count + nonstatic_byte_count + |
|
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diff
changeset
|
3226 nonstatic_oop_count) != 0); |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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92
diff
changeset
|
3227 |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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92
diff
changeset
|
3228 |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3229 // Prepare list of oops for oop map generation. |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3230 int* nonstatic_oop_offsets; |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3231 unsigned int* nonstatic_oop_counts; |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3232 unsigned int nonstatic_oop_map_count = 0; |
| 0 | 3233 |
| 3234 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
|
939
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6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3235 THREAD, int, nonstatic_oop_count + 1); |
| 938 | 3236 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3237 THREAD, unsigned int, nonstatic_oop_count + 1); |
| 0 | 3238 |
| 3239 // Add fake fields for java.lang.Class instances (also see above). | |
| 3240 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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2085
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changeset
|
3241 if(class_name == vmSymbols::java_lang_Class() && class_loader.is_null()) { |
| 0 | 3242 java_lang_Class_fix_post(&next_nonstatic_field_offset); |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3243 nonstatic_oop_offsets[0] = first_nonstatic_field_offset; |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3244 const uint fake_oop_count = (next_nonstatic_field_offset - |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3245 first_nonstatic_field_offset) / heapOopSize; |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3246 nonstatic_oop_counts[0] = fake_oop_count; |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3247 nonstatic_oop_map_count = 1; |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3248 nonstatic_oop_count -= fake_oop_count; |
| 0 | 3249 first_nonstatic_oop_offset = first_nonstatic_field_offset; |
| 3250 } else { | |
| 3251 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
| 3252 } | |
| 3253 | |
| 3254 #ifndef PRODUCT | |
| 3255 if( PrintCompactFieldsSavings ) { | |
| 3256 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
|
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|
3257 (nonstatic_oop_count * heapOopSize); |
| 0 | 3258 if ( nonstatic_double_count > 0 ) { |
| 3259 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
| 3260 } | |
| 3261 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 3262 (nonstatic_double_count * BytesPerLong); | |
| 3263 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 3264 (nonstatic_word_count * BytesPerInt); | |
| 3265 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 3266 (nonstatic_short_count * BytesPerShort); | |
| 3267 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
|
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|
3268 nonstatic_byte_count ), heapOopSize ); |
| 0 | 3269 orig_nonstatic_field_size = nonstatic_field_size + |
|
165
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|
3270 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); |
| 0 | 3271 } |
| 3272 #endif | |
| 3273 bool compact_fields = CompactFields; | |
| 3274 int allocation_style = FieldsAllocationStyle; | |
|
1366
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|
3275 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? |
|
b9d85fcdf743
6940733: allocate non static oop fields in super and sub classes together
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1144
diff
changeset
|
3276 assert(false, "0 <= FieldsAllocationStyle <= 2"); |
| 0 | 3277 allocation_style = 1; // Optimistic |
| 3278 } | |
| 3279 | |
| 3280 // The next classes have predefined hard-coded fields offsets | |
| 3281 // (see in JavaClasses::compute_hard_coded_offsets()). | |
| 3282 // Use default fields allocation order for them. | |
| 3283 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
|
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|
3284 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() || |
|
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|
3285 class_name == vmSymbols::java_lang_Class() || |
|
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|
3286 class_name == vmSymbols::java_lang_ClassLoader() || |
|
3582bf76420e
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|
3287 class_name == vmSymbols::java_lang_ref_Reference() || |
|
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|
3288 class_name == vmSymbols::java_lang_ref_SoftReference() || |
|
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|
3289 class_name == vmSymbols::java_lang_StackTraceElement() || |
|
3582bf76420e
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|
3290 class_name == vmSymbols::java_lang_String() || |
|
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|
3291 class_name == vmSymbols::java_lang_Throwable() || |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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|
3292 class_name == vmSymbols::java_lang_Boolean() || |
|
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|
3293 class_name == vmSymbols::java_lang_Character() || |
|
3582bf76420e
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|
3294 class_name == vmSymbols::java_lang_Float() || |
|
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|
3295 class_name == vmSymbols::java_lang_Double() || |
|
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|
3296 class_name == vmSymbols::java_lang_Byte() || |
|
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|
3297 class_name == vmSymbols::java_lang_Short() || |
|
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|
3298 class_name == vmSymbols::java_lang_Integer() || |
|
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2085
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|
3299 class_name == vmSymbols::java_lang_Long())) { |
| 0 | 3300 allocation_style = 0; // Allocate oops first |
| 3301 compact_fields = false; // Don't compact fields | |
| 3302 } | |
| 3303 | |
| 3304 if( allocation_style == 0 ) { | |
| 3305 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
| 3306 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
| 3307 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
|
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|
3308 (nonstatic_oop_count * heapOopSize); |
| 0 | 3309 } else if( allocation_style == 1 ) { |
| 3310 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
| 3311 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
|
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|
3312 } else if( allocation_style == 2 ) { |
|
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changeset
|
3313 // Fields allocation: oops fields in super and sub classes are together. |
|
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diff
changeset
|
3314 if( nonstatic_field_size > 0 && super_klass() != NULL && |
|
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|
3315 super_klass->nonstatic_oop_map_size() > 0 ) { |
|
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|
3316 int map_size = super_klass->nonstatic_oop_map_size(); |
|
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diff
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|
3317 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps(); |
|
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diff
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|
3318 OopMapBlock* last_map = first_map + map_size - 1; |
|
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diff
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|
3319 int next_offset = last_map->offset() + (last_map->count() * heapOopSize); |
|
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|
3320 if (next_offset == next_nonstatic_field_offset) { |
|
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|
3321 allocation_style = 0; // allocate oops first |
|
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diff
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|
3322 next_nonstatic_oop_offset = next_nonstatic_field_offset; |
|
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|
3323 next_nonstatic_double_offset = next_nonstatic_oop_offset + |
|
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diff
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|
3324 (nonstatic_oop_count * heapOopSize); |
|
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|
3325 } |
|
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diff
changeset
|
3326 } |
|
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|
3327 if( allocation_style == 2 ) { |
|
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diff
changeset
|
3328 allocation_style = 1; // allocate oops last |
|
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|
3329 next_nonstatic_double_offset = next_nonstatic_field_offset; |
|
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|
3330 } |
| 0 | 3331 } else { |
| 3332 ShouldNotReachHere(); | |
| 3333 } | |
| 3334 | |
| 3335 int nonstatic_oop_space_count = 0; | |
| 3336 int nonstatic_word_space_count = 0; | |
| 3337 int nonstatic_short_space_count = 0; | |
| 3338 int nonstatic_byte_space_count = 0; | |
| 3339 int nonstatic_oop_space_offset; | |
| 3340 int nonstatic_word_space_offset; | |
| 3341 int nonstatic_short_space_offset; | |
| 3342 int nonstatic_byte_space_offset; | |
| 3343 | |
|
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|
3344 if( nonstatic_double_count > 0 ) { |
|
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|
3345 int offset = next_nonstatic_double_offset; |
| 0 | 3346 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
| 3347 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
| 3348 // Allocate available fields into the gap before double field. | |
| 3349 int length = next_nonstatic_double_offset - offset; | |
| 3350 assert(length == BytesPerInt, ""); | |
| 3351 nonstatic_word_space_offset = offset; | |
| 3352 if( nonstatic_word_count > 0 ) { | |
| 3353 nonstatic_word_count -= 1; | |
| 3354 nonstatic_word_space_count = 1; // Only one will fit | |
| 3355 length -= BytesPerInt; | |
| 3356 offset += BytesPerInt; | |
| 3357 } | |
| 3358 nonstatic_short_space_offset = offset; | |
| 3359 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
| 3360 nonstatic_short_count -= 1; | |
| 3361 nonstatic_short_space_count += 1; | |
| 3362 length -= BytesPerShort; | |
| 3363 offset += BytesPerShort; | |
| 3364 } | |
| 3365 nonstatic_byte_space_offset = offset; | |
| 3366 while( length > 0 && nonstatic_byte_count > 0 ) { | |
| 3367 nonstatic_byte_count -= 1; | |
| 3368 nonstatic_byte_space_count += 1; | |
| 3369 length -= 1; | |
| 3370 } | |
| 3371 // Allocate oop field in the gap if there are no other fields for that. | |
| 3372 nonstatic_oop_space_offset = offset; | |
|
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|
3373 if( length >= heapOopSize && nonstatic_oop_count > 0 && |
| 0 | 3374 allocation_style != 0 ) { // when oop fields not first |
| 3375 nonstatic_oop_count -= 1; | |
| 3376 nonstatic_oop_space_count = 1; // Only one will fit | |
|
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|
3377 length -= heapOopSize; |
|
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diff
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|
3378 offset += heapOopSize; |
| 0 | 3379 } |
| 3380 } | |
| 3381 } | |
| 3382 | |
| 3383 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 3384 (nonstatic_double_count * BytesPerLong); | |
| 3385 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 3386 (nonstatic_word_count * BytesPerInt); | |
| 3387 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 3388 (nonstatic_short_count * BytesPerShort); | |
| 3389 | |
| 3390 int notaligned_offset; | |
| 3391 if( allocation_style == 0 ) { | |
| 3392 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 3393 } else { // allocation_style == 1 | |
| 3394 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 3395 if( nonstatic_oop_count > 0 ) { | |
|
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|
3396 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
| 0 | 3397 } |
|
113
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|
3398 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
| 0 | 3399 } |
|
165
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|
3400 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); |
| 0 | 3401 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset |
|
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|
3402 - first_nonstatic_field_offset)/heapOopSize); |
| 0 | 3403 |
| 3404 // Iterate over fields again and compute correct offsets. | |
| 3405 // The field allocation type was temporarily stored in the offset slot. | |
| 3406 // oop fields are located before non-oop fields (static and non-static). | |
| 3407 int len = fields->length(); | |
| 3408 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
| 3409 int real_offset; | |
| 1108 | 3410 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset); |
| 0 | 3411 switch (atype) { |
| 3412 case STATIC_OOP: | |
| 3413 real_offset = next_static_oop_offset; | |
|
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diff
changeset
|
3414 next_static_oop_offset += heapOopSize; |
| 0 | 3415 break; |
| 3416 case STATIC_BYTE: | |
| 3417 real_offset = next_static_byte_offset; | |
| 3418 next_static_byte_offset += 1; | |
| 3419 break; | |
| 3420 case STATIC_SHORT: | |
| 3421 real_offset = next_static_short_offset; | |
| 3422 next_static_short_offset += BytesPerShort; | |
| 3423 break; | |
| 3424 case STATIC_WORD: | |
| 3425 real_offset = next_static_word_offset; | |
| 3426 next_static_word_offset += BytesPerInt; | |
| 3427 break; | |
| 3428 case STATIC_ALIGNED_DOUBLE: | |
| 3429 case STATIC_DOUBLE: | |
| 3430 real_offset = next_static_double_offset; | |
| 3431 next_static_double_offset += BytesPerLong; | |
| 3432 break; | |
| 3433 case NONSTATIC_OOP: | |
| 3434 if( nonstatic_oop_space_count > 0 ) { | |
| 3435 real_offset = nonstatic_oop_space_offset; | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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92
diff
changeset
|
3436 nonstatic_oop_space_offset += heapOopSize; |
| 0 | 3437 nonstatic_oop_space_count -= 1; |
| 3438 } else { | |
| 3439 real_offset = next_nonstatic_oop_offset; | |
|
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diff
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|
3440 next_nonstatic_oop_offset += heapOopSize; |
| 0 | 3441 } |
| 3442 // Update oop maps | |
| 3443 if( nonstatic_oop_map_count > 0 && | |
| 3444 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3445 real_offset - |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3446 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3447 heapOopSize ) { |
| 0 | 3448 // Extend current oop map |
| 938 | 3449 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; |
| 0 | 3450 } else { |
| 3451 // Create new oop map | |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3452 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; |
| 938 | 3453 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; |
| 0 | 3454 nonstatic_oop_map_count += 1; |
| 3455 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
| 3456 first_nonstatic_oop_offset = real_offset; | |
| 3457 } | |
| 3458 } | |
| 3459 break; | |
| 3460 case NONSTATIC_BYTE: | |
| 3461 if( nonstatic_byte_space_count > 0 ) { | |
| 3462 real_offset = nonstatic_byte_space_offset; | |
| 3463 nonstatic_byte_space_offset += 1; | |
| 3464 nonstatic_byte_space_count -= 1; | |
| 3465 } else { | |
| 3466 real_offset = next_nonstatic_byte_offset; | |
| 3467 next_nonstatic_byte_offset += 1; | |
| 3468 } | |
| 3469 break; | |
| 3470 case NONSTATIC_SHORT: | |
| 3471 if( nonstatic_short_space_count > 0 ) { | |
| 3472 real_offset = nonstatic_short_space_offset; | |
| 3473 nonstatic_short_space_offset += BytesPerShort; | |
| 3474 nonstatic_short_space_count -= 1; | |
| 3475 } else { | |
| 3476 real_offset = next_nonstatic_short_offset; | |
| 3477 next_nonstatic_short_offset += BytesPerShort; | |
| 3478 } | |
| 3479 break; | |
| 3480 case NONSTATIC_WORD: | |
| 3481 if( nonstatic_word_space_count > 0 ) { | |
| 3482 real_offset = nonstatic_word_space_offset; | |
| 3483 nonstatic_word_space_offset += BytesPerInt; | |
| 3484 nonstatic_word_space_count -= 1; | |
| 3485 } else { | |
| 3486 real_offset = next_nonstatic_word_offset; | |
| 3487 next_nonstatic_word_offset += BytesPerInt; | |
| 3488 } | |
| 3489 break; | |
| 3490 case NONSTATIC_ALIGNED_DOUBLE: | |
| 3491 case NONSTATIC_DOUBLE: | |
| 3492 real_offset = next_nonstatic_double_offset; | |
| 3493 next_nonstatic_double_offset += BytesPerLong; | |
| 3494 break; | |
| 3495 default: | |
| 3496 ShouldNotReachHere(); | |
| 3497 } | |
| 1108 | 3498 fields->short_at_put(i + instanceKlass::low_offset, extract_low_short_from_int(real_offset)); |
| 3499 fields->short_at_put(i + instanceKlass::high_offset, extract_high_short_from_int(real_offset)); | |
| 0 | 3500 } |
| 3501 | |
| 3502 // Size of instances | |
| 3503 int instance_size; | |
| 3504 | |
|
165
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136
diff
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|
3505 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); |
| 0 | 3506 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); |
| 3507 | |
|
165
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|
3508 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value"); |
| 0 | 3509 |
| 938 | 3510 // Number of non-static oop map blocks allocated at end of klass. |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3511 const unsigned int total_oop_map_count = |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3512 compute_oop_map_count(super_klass, nonstatic_oop_map_count, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3513 first_nonstatic_oop_offset); |
| 0 | 3514 |
| 3515 // Compute reference type | |
| 3516 ReferenceType rt; | |
| 3517 if (super_klass() == NULL) { | |
| 3518 rt = REF_NONE; | |
| 3519 } else { | |
| 3520 rt = super_klass->reference_type(); | |
| 3521 } | |
| 3522 | |
| 3523 // We can now create the basic klassOop for this klass | |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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parents:
2357
diff
changeset
|
3524 klassOop ik = oopFactory::new_instanceKlass(name, vtable_size, itable_size, |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3525 static_field_size, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3526 total_oop_map_count, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
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938
diff
changeset
|
3527 rt, CHECK_(nullHandle)); |
| 0 | 3528 instanceKlassHandle this_klass (THREAD, ik); |
| 3529 | |
| 938 | 3530 assert(this_klass->static_field_size() == static_field_size, "sanity"); |
| 3531 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count, | |
| 3532 "sanity"); | |
| 0 | 3533 |
| 3534 // Fill in information already parsed | |
| 3535 this_klass->set_access_flags(access_flags); | |
| 975 | 3536 this_klass->set_should_verify_class(verify); |
| 0 | 3537 jint lh = Klass::instance_layout_helper(instance_size, false); |
| 3538 this_klass->set_layout_helper(lh); | |
| 3539 assert(this_klass->oop_is_instance(), "layout is correct"); | |
| 3540 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
| 3541 // Not yet: supers are done below to support the new subtype-checking fields | |
| 3542 //this_klass->set_super(super_klass()); | |
| 3543 this_klass->set_class_loader(class_loader()); | |
| 3544 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
| 975 | 3545 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
|
2376
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7017732: move static fields into Class to prepare for perm gen removal
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parents:
2357
diff
changeset
|
3546 this_klass->set_static_oop_field_count(fac.static_oop_count); |
| 0 | 3547 cp->set_pool_holder(this_klass()); |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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2085
diff
changeset
|
3548 error_handler.set_in_error(false); // turn off error handler for cp |
| 0 | 3549 this_klass->set_constants(cp()); |
| 3550 this_klass->set_local_interfaces(local_interfaces()); | |
| 3551 this_klass->set_fields(fields()); | |
| 3552 this_klass->set_methods(methods()); | |
| 3553 if (has_final_method) { | |
| 3554 this_klass->set_has_final_method(); | |
| 3555 } | |
| 3556 this_klass->set_method_ordering(method_ordering()); | |
|
977
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6419370: 4/4 new jmethodID code has tiny holes in synchronization
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975
diff
changeset
|
3557 // The instanceKlass::_methods_jmethod_ids cache and the |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
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parents:
975
diff
changeset
|
3558 // instanceKlass::_methods_cached_itable_indices cache are |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
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975
diff
changeset
|
3559 // both managed on the assumption that the initial cache |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
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975
diff
changeset
|
3560 // size is equal to the number of methods in the class. If |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3561 // that changes, then instanceKlass::idnum_can_increment() |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3562 // has to be changed accordingly. |
| 0 | 3563 this_klass->set_initial_method_idnum(methods->length()); |
| 3564 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
| 710 | 3565 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself |
|
474
7a018855d2f0
6779339: turn off LinkWellKnownClasses by default pending further testing
jrose
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431
diff
changeset
|
3566 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve |
| 0 | 3567 this_klass->set_protection_domain(protection_domain()); |
| 3568 this_klass->set_fields_annotations(fields_annotations()); | |
| 3569 this_klass->set_methods_annotations(methods_annotations()); | |
| 3570 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
| 3571 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
| 3572 | |
| 3573 this_klass->set_minor_version(minor_version); | |
| 3574 this_klass->set_major_version(major_version); | |
| 3575 | |
|
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
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710
diff
changeset
|
3576 // Set up methodOop::intrinsic_id as soon as we know the names of methods. |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3577 // (We used to do this lazily, but now we query it in Rewriter, |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3578 // which is eagerly done for every method, so we might as well do it now, |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
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710
diff
changeset
|
3579 // when everything is fresh in memory.) |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
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710
diff
changeset
|
3580 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) { |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
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710
diff
changeset
|
3581 for (int j = 0; j < methods->length(); j++) { |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
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710
diff
changeset
|
3582 ((methodOop)methods->obj_at(j))->init_intrinsic_id(); |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
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710
diff
changeset
|
3583 } |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
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710
diff
changeset
|
3584 } |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3585 |
| 0 | 3586 if (cached_class_file_bytes != NULL) { |
| 3587 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
| 3588 this_klass->set_cached_class_file(cached_class_file_bytes, | |
| 3589 cached_class_file_length); | |
| 3590 } | |
| 3591 | |
| 3592 // Miranda methods | |
| 3593 if ((num_miranda_methods > 0) || | |
| 3594 // if this class introduced new miranda methods or | |
| 3595 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
| 3596 // super class exists and this class inherited miranda methods | |
| 3597 ) { | |
| 3598 this_klass->set_has_miranda_methods(); // then set a flag | |
| 3599 } | |
| 3600 | |
| 3601 // Additional attributes | |
| 3602 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
| 3603 | |
| 3604 // Make sure this is the end of class file stream | |
| 3605 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
| 3606 | |
| 3607 // VerifyOops believes that once this has been set, the object is completely loaded. | |
| 3608 // Compute transitive closure of interfaces this class implements | |
| 3609 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
| 3610 | |
| 3611 // Fill in information needed to compute superclasses. | |
| 3612 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
| 3613 | |
| 3614 // Initialize itable offset tables | |
| 3615 klassItable::setup_itable_offset_table(this_klass); | |
| 3616 | |
| 3617 // Do final class setup | |
| 938 | 3618 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts); |
| 0 | 3619 |
| 3620 set_precomputed_flags(this_klass); | |
| 3621 | |
| 3622 // reinitialize modifiers, using the InnerClasses attribute | |
| 3623 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
| 3624 this_klass->set_modifier_flags(computed_modifiers); | |
| 3625 | |
| 3626 // check if this class can access its super class | |
| 3627 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
| 3628 | |
| 3629 // check if this class can access its superinterfaces | |
| 3630 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
| 3631 | |
| 3632 // check if this class overrides any final method | |
| 3633 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
| 3634 | |
| 3635 // check that if this class is an interface then it doesn't have static methods | |
| 3636 if (this_klass->is_interface()) { | |
| 3637 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
| 3638 } | |
| 3639 | |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
3640 // Allocate mirror and initialize static fields |
|
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
3641 java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle)); |
|
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
3642 |
| 0 | 3643 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), |
| 3644 false /* not shared class */); | |
| 3645 | |
| 3646 if (TraceClassLoading) { | |
| 3647 // print in a single call to reduce interleaving of output | |
| 3648 if (cfs->source() != NULL) { | |
| 3649 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3650 cfs->source()); | |
| 3651 } else if (class_loader.is_null()) { | |
| 3652 if (THREAD->is_Java_thread()) { | |
| 3653 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
| 3654 tty->print("[Loaded %s by instance of %s]\n", | |
| 3655 this_klass->external_name(), | |
| 3656 instanceKlass::cast(caller)->external_name()); | |
| 3657 } else { | |
| 3658 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
| 3659 } | |
| 3660 } else { | |
| 3661 ResourceMark rm; | |
| 3662 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3663 instanceKlass::cast(class_loader->klass())->external_name()); | |
| 3664 } | |
| 3665 } | |
| 3666 | |
| 3667 if (TraceClassResolution) { | |
| 3668 // print out the superclass. | |
| 3669 const char * from = Klass::cast(this_klass())->external_name(); | |
| 3670 if (this_klass->java_super() != NULL) { | |
|
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
652
diff
changeset
|
3671 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); |
| 0 | 3672 } |
| 3673 // print out each of the interface classes referred to by this class. | |
| 3674 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
| 3675 if (!local_interfaces.is_null()) { | |
| 3676 int length = local_interfaces->length(); | |
| 3677 for (int i = 0; i < length; i++) { | |
| 3678 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3679 instanceKlass* to_class = instanceKlass::cast(k); | |
| 3680 const char * to = to_class->external_name(); | |
|
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
652
diff
changeset
|
3681 tty->print("RESOLVE %s %s (interface)\n", from, to); |
| 0 | 3682 } |
| 3683 } | |
| 3684 } | |
| 3685 | |
| 3686 #ifndef PRODUCT | |
| 3687 if( PrintCompactFieldsSavings ) { | |
| 3688 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
|
165
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3689 tty->print("[Saved %d of %d bytes in %s]\n", |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3690 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize, |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3691 orig_nonstatic_field_size*heapOopSize, |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3692 this_klass->external_name()); |
| 0 | 3693 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { |
|
165
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3694 tty->print("[Wasted %d over %d bytes in %s]\n", |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3695 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize, |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3696 orig_nonstatic_field_size*heapOopSize, |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3697 this_klass->external_name()); |
| 0 | 3698 } |
| 3699 } | |
| 3700 #endif | |
| 3701 | |
| 3702 // preserve result across HandleMark | |
| 3703 preserve_this_klass = this_klass(); | |
| 3704 } | |
| 3705 | |
| 3706 // Create new handle outside HandleMark | |
| 3707 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
| 3708 debug_only(this_klass->as_klassOop()->verify();) | |
| 3709 | |
| 3710 return this_klass; | |
| 3711 } | |
| 3712 | |
| 3713 | |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3714 unsigned int |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3715 ClassFileParser::compute_oop_map_count(instanceKlassHandle super, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3716 unsigned int nonstatic_oop_map_count, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3717 int first_nonstatic_oop_offset) { |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3718 unsigned int map_count = |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3719 super.is_null() ? 0 : super->nonstatic_oop_map_count(); |
| 0 | 3720 if (nonstatic_oop_map_count > 0) { |
| 3721 // We have oops to add to map | |
| 938 | 3722 if (map_count == 0) { |
| 3723 map_count = nonstatic_oop_map_count; | |
| 0 | 3724 } else { |
| 938 | 3725 // Check whether we should add a new map block or whether the last one can |
| 3726 // be extended | |
| 3727 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); | |
| 3728 OopMapBlock* const last_map = first_map + map_count - 1; | |
| 3729 | |
| 3730 int next_offset = last_map->offset() + last_map->count() * heapOopSize; | |
| 0 | 3731 if (next_offset == first_nonstatic_oop_offset) { |
| 3732 // There is no gap bettwen superklass's last oop field and first | |
| 3733 // local oop field, merge maps. | |
| 3734 nonstatic_oop_map_count -= 1; | |
| 3735 } else { | |
| 3736 // Superklass didn't end with a oop field, add extra maps | |
| 938 | 3737 assert(next_offset < first_nonstatic_oop_offset, "just checking"); |
| 0 | 3738 } |
| 938 | 3739 map_count += nonstatic_oop_map_count; |
| 0 | 3740 } |
| 3741 } | |
| 938 | 3742 return map_count; |
| 0 | 3743 } |
| 3744 | |
| 3745 | |
| 3746 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3747 unsigned int nonstatic_oop_map_count, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3748 int* nonstatic_oop_offsets, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3749 unsigned int* nonstatic_oop_counts) { |
| 0 | 3750 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); |
| 938 | 3751 const instanceKlass* const super = k->superklass(); |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3752 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; |
| 938 | 3753 if (super_count > 0) { |
| 3754 // Copy maps from superklass | |
| 0 | 3755 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3756 for (unsigned int i = 0; i < super_count; ++i) { |
| 0 | 3757 *this_oop_map++ = *super_oop_map++; |
| 3758 } | |
| 3759 } | |
| 938 | 3760 |
| 0 | 3761 if (nonstatic_oop_map_count > 0) { |
| 938 | 3762 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { |
| 3763 // The counts differ because there is no gap between superklass's last oop | |
| 3764 // field and the first local oop field. Extend the last oop map copied | |
| 0 | 3765 // from the superklass instead of creating new one. |
| 3766 nonstatic_oop_map_count--; | |
| 3767 nonstatic_oop_offsets++; | |
| 3768 this_oop_map--; | |
| 938 | 3769 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); |
| 0 | 3770 this_oop_map++; |
| 3771 } | |
| 938 | 3772 |
| 0 | 3773 // Add new map blocks, fill them |
| 3774 while (nonstatic_oop_map_count-- > 0) { | |
| 3775 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
| 938 | 3776 this_oop_map->set_count(*nonstatic_oop_counts++); |
| 0 | 3777 this_oop_map++; |
| 3778 } | |
| 938 | 3779 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == |
| 3780 this_oop_map, "sanity"); | |
| 0 | 3781 } |
| 3782 } | |
| 3783 | |
| 3784 | |
| 3785 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
| 3786 klassOop super = k->super(); | |
| 3787 | |
| 3788 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
| 3789 // in which case we don't have to register objects as finalizable | |
| 3790 if (!_has_empty_finalizer) { | |
| 3791 if (_has_finalizer || | |
| 3792 (super != NULL && super->klass_part()->has_finalizer())) { | |
| 3793 k->set_has_finalizer(); | |
| 3794 } | |
| 3795 } | |
| 3796 | |
| 3797 #ifdef ASSERT | |
| 3798 bool f = false; | |
| 3799 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
| 3800 vmSymbols::void_method_signature()); | |
| 3801 if (m != NULL && !m->is_empty_method()) { | |
| 3802 f = true; | |
| 3803 } | |
| 3804 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
| 3805 #endif | |
| 3806 | |
| 3807 // Check if this klass supports the java.lang.Cloneable interface | |
| 1142 | 3808 if (SystemDictionary::Cloneable_klass_loaded()) { |
| 3809 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) { | |
| 0 | 3810 k->set_is_cloneable(); |
| 3811 } | |
| 3812 } | |
| 3813 | |
| 3814 // Check if this klass has a vanilla default constructor | |
| 3815 if (super == NULL) { | |
| 3816 // java.lang.Object has empty default constructor | |
| 3817 k->set_has_vanilla_constructor(); | |
| 3818 } else { | |
| 3819 if (Klass::cast(super)->has_vanilla_constructor() && | |
| 3820 _has_vanilla_constructor) { | |
| 3821 k->set_has_vanilla_constructor(); | |
| 3822 } | |
| 3823 #ifdef ASSERT | |
| 3824 bool v = false; | |
| 3825 if (Klass::cast(super)->has_vanilla_constructor()) { | |
| 3826 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
| 3827 ), vmSymbols::void_method_signature()); | |
| 3828 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
| 3829 v = true; | |
| 3830 } | |
| 3831 } | |
| 3832 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
| 3833 #endif | |
| 3834 } | |
| 3835 | |
| 3836 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
| 3837 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
| 3838 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
| 3839 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
| 3840 || k->is_abstract() || k->is_interface() | |
| 3841 || (k->name() == vmSymbols::java_lang_Class() | |
| 3842 && k->class_loader() == NULL) | |
| 3843 || k->size_helper() >= FastAllocateSizeLimit) { | |
| 3844 // Forbid fast-path allocation. | |
| 3845 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
| 3846 k->set_layout_helper(lh); | |
| 3847 } | |
| 3848 } | |
| 3849 | |
| 3850 | |
| 3851 // utility method for appending and array with check for duplicates | |
| 3852 | |
| 3853 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
| 3854 // iterate over new interfaces | |
| 3855 for (int i = 0; i < ifs->length(); i++) { | |
| 3856 oop e = ifs->obj_at(i); | |
| 3857 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
| 3858 // check for duplicates | |
| 3859 bool duplicate = false; | |
| 3860 for (int j = 0; j < index; j++) { | |
| 3861 if (result->obj_at(j) == e) { | |
| 3862 duplicate = true; | |
| 3863 break; | |
| 3864 } | |
| 3865 } | |
| 3866 // add new interface | |
| 3867 if (!duplicate) { | |
| 3868 result->obj_at_put(index++, e); | |
| 3869 } | |
| 3870 } | |
| 3871 } | |
| 3872 | |
| 3873 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
| 3874 // Compute maximum size for transitive interfaces | |
| 3875 int max_transitive_size = 0; | |
| 3876 int super_size = 0; | |
| 3877 // Add superclass transitive interfaces size | |
| 3878 if (super.not_null()) { | |
| 3879 super_size = super->transitive_interfaces()->length(); | |
| 3880 max_transitive_size += super_size; | |
| 3881 } | |
| 3882 // Add local interfaces' super interfaces | |
| 3883 int local_size = local_ifs->length(); | |
| 3884 for (int i = 0; i < local_size; i++) { | |
| 3885 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3886 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
| 3887 } | |
| 3888 // Finally add local interfaces | |
| 3889 max_transitive_size += local_size; | |
| 3890 // Construct array | |
| 3891 objArrayHandle result; | |
| 3892 if (max_transitive_size == 0) { | |
| 3893 // no interfaces, use canonicalized array | |
| 3894 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 3895 } else if (max_transitive_size == super_size) { | |
| 3896 // no new local interfaces added, share superklass' transitive interface array | |
| 3897 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
| 3898 } else if (max_transitive_size == local_size) { | |
| 3899 // only local interfaces added, share local interface array | |
| 3900 result = local_ifs; | |
| 3901 } else { | |
| 3902 objArrayHandle nullHandle; | |
| 3903 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
| 3904 result = objArrayHandle(THREAD, new_objarray); | |
| 3905 int index = 0; | |
| 3906 // Copy down from superclass | |
| 3907 if (super.not_null()) { | |
| 3908 append_interfaces(result, index, super->transitive_interfaces()); | |
| 3909 } | |
| 3910 // Copy down from local interfaces' superinterfaces | |
| 3911 for (int i = 0; i < local_ifs->length(); i++) { | |
| 3912 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3913 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
| 3914 } | |
| 3915 // Finally add local interfaces | |
| 3916 append_interfaces(result, index, local_ifs()); | |
| 3917 | |
| 3918 // Check if duplicates were removed | |
| 3919 if (index != max_transitive_size) { | |
| 3920 assert(index < max_transitive_size, "just checking"); | |
| 3921 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
| 3922 for (int i = 0; i < index; i++) { | |
| 3923 oop e = result->obj_at(i); | |
| 3924 assert(e != NULL, "just checking"); | |
| 3925 new_result->obj_at_put(i, e); | |
| 3926 } | |
| 3927 result = objArrayHandle(THREAD, new_result); | |
| 3928 } | |
| 3929 } | |
| 3930 return result; | |
| 3931 } | |
| 3932 | |
| 3933 | |
| 3934 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3935 klassOop super = this_klass->super(); | |
| 3936 if ((super != NULL) && | |
| 3937 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
| 3938 ResourceMark rm(THREAD); | |
| 3939 Exceptions::fthrow( | |
| 3940 THREAD_AND_LOCATION, | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2085
diff
changeset
|
3941 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 3942 "class %s cannot access its superclass %s", |
| 3943 this_klass->external_name(), | |
| 3944 instanceKlass::cast(super)->external_name() | |
| 3945 ); | |
| 3946 return; | |
| 3947 } | |
| 3948 } | |
| 3949 | |
| 3950 | |
| 3951 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3952 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
| 3953 int lng = local_interfaces->length(); | |
| 3954 for (int i = lng - 1; i >= 0; i--) { | |
| 3955 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3956 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
| 3957 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
| 3958 ResourceMark rm(THREAD); | |
| 3959 Exceptions::fthrow( | |
| 3960 THREAD_AND_LOCATION, | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2085
diff
changeset
|
3961 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 3962 "class %s cannot access its superinterface %s", |
| 3963 this_klass->external_name(), | |
| 3964 instanceKlass::cast(k)->external_name() | |
| 3965 ); | |
| 3966 return; | |
| 3967 } | |
| 3968 } | |
| 3969 } | |
| 3970 | |
| 3971 | |
| 3972 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
| 3973 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3974 int num_methods = methods->length(); | |
| 3975 | |
| 3976 // go thru each method and check if it overrides a final method | |
| 3977 for (int index = 0; index < num_methods; index++) { | |
| 3978 methodOop m = (methodOop)methods->obj_at(index); | |
| 3979 | |
| 3980 // skip private, static and <init> methods | |
| 3981 if ((!m->is_private()) && | |
| 3982 (!m->is_static()) && | |
| 3983 (m->name() != vmSymbols::object_initializer_name())) { | |
| 3984 | |
|
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3985 Symbol* name = m->name(); |
|
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3986 Symbol* signature = m->signature(); |
| 0 | 3987 klassOop k = this_klass->super(); |
| 3988 methodOop super_m = NULL; | |
| 3989 while (k != NULL) { | |
| 3990 // skip supers that don't have final methods. | |
| 3991 if (k->klass_part()->has_final_method()) { | |
| 3992 // lookup a matching method in the super class hierarchy | |
| 3993 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
| 3994 if (super_m == NULL) { | |
| 3995 break; // didn't find any match; get out | |
| 3996 } | |
| 3997 | |
| 3998 if (super_m->is_final() && | |
| 3999 // matching method in super is final | |
| 4000 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
| 4001 super_m->method_holder(), | |
| 4002 super_m->method_holder(), | |
| 4003 super_m->access_flags(), false)) | |
| 4004 // this class can access super final method and therefore override | |
| 4005 ) { | |
| 4006 ResourceMark rm(THREAD); | |
| 4007 Exceptions::fthrow( | |
| 4008 THREAD_AND_LOCATION, | |
|
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4009 vmSymbols::java_lang_VerifyError(), |
| 0 | 4010 "class %s overrides final method %s.%s", |
| 4011 this_klass->external_name(), | |
| 4012 name->as_C_string(), | |
| 4013 signature->as_C_string() | |
| 4014 ); | |
| 4015 return; | |
| 4016 } | |
| 4017 | |
| 4018 // continue to look from super_m's holder's super. | |
| 4019 k = instanceKlass::cast(super_m->method_holder())->super(); | |
| 4020 continue; | |
| 4021 } | |
| 4022 | |
| 4023 k = k->klass_part()->super(); | |
| 4024 } | |
| 4025 } | |
| 4026 } | |
| 4027 } | |
| 4028 | |
| 4029 | |
| 4030 // assumes that this_klass is an interface | |
| 4031 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
| 4032 assert(this_klass->is_interface(), "not an interface"); | |
| 4033 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 4034 int num_methods = methods->length(); | |
| 4035 | |
| 4036 for (int index = 0; index < num_methods; index++) { | |
| 4037 methodOop m = (methodOop)methods->obj_at(index); | |
| 4038 // if m is static and not the init method, throw a verify error | |
| 4039 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
| 4040 ResourceMark rm(THREAD); | |
| 4041 Exceptions::fthrow( | |
| 4042 THREAD_AND_LOCATION, | |
|
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4043 vmSymbols::java_lang_VerifyError(), |
| 0 | 4044 "Illegal static method %s in interface %s", |
| 4045 m->name()->as_C_string(), | |
| 4046 this_klass->external_name() | |
| 4047 ); | |
| 4048 return; | |
| 4049 } | |
| 4050 } | |
| 4051 } | |
| 4052 | |
| 4053 // utility methods for format checking | |
| 4054 | |
| 4055 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
| 4056 if (!_need_verify) { return; } | |
| 4057 | |
| 4058 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
| 4059 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 4060 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 4061 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
| 4062 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 4063 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
| 4064 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 4065 | |
| 4066 if ((is_abstract && is_final) || | |
| 4067 (is_interface && !is_abstract) || | |
| 4068 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
| 4069 (!is_interface && major_gte_15 && is_annotation)) { | |
| 4070 ResourceMark rm(THREAD); | |
| 4071 Exceptions::fthrow( | |
| 4072 THREAD_AND_LOCATION, | |
|
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4073 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4074 "Illegal class modifiers in class %s: 0x%X", |
| 4075 _class_name->as_C_string(), flags | |
| 4076 ); | |
| 4077 return; | |
| 4078 } | |
| 4079 } | |
| 4080 | |
| 4081 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
| 4082 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 4083 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 4084 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 4085 | |
| 4086 return ((is_public && is_protected) || | |
| 4087 (is_public && is_private) || | |
| 4088 (is_protected && is_private)); | |
| 4089 } | |
| 4090 | |
| 4091 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
|
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4092 u2 max_version = |
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4093 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION : |
|
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4094 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION); |
| 0 | 4095 return (major >= JAVA_MIN_SUPPORTED_VERSION) && |
|
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4096 (major <= max_version) && |
|
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4097 ((major != max_version) || |
| 0 | 4098 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); |
| 4099 } | |
| 4100 | |
| 4101 void ClassFileParser::verify_legal_field_modifiers( | |
| 4102 jint flags, bool is_interface, TRAPS) { | |
| 4103 if (!_need_verify) { return; } | |
| 4104 | |
| 4105 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 4106 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 4107 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 4108 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 4109 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 4110 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
| 4111 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
| 4112 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 4113 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 4114 | |
| 4115 bool is_illegal = false; | |
| 4116 | |
| 4117 if (is_interface) { | |
| 4118 if (!is_public || !is_static || !is_final || is_private || | |
| 4119 is_protected || is_volatile || is_transient || | |
| 4120 (major_gte_15 && is_enum)) { | |
| 4121 is_illegal = true; | |
| 4122 } | |
| 4123 } else { // not interface | |
| 4124 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
| 4125 is_illegal = true; | |
| 4126 } | |
| 4127 } | |
| 4128 | |
| 4129 if (is_illegal) { | |
| 4130 ResourceMark rm(THREAD); | |
| 4131 Exceptions::fthrow( | |
| 4132 THREAD_AND_LOCATION, | |
|
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4133 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4134 "Illegal field modifiers in class %s: 0x%X", |
| 4135 _class_name->as_C_string(), flags); | |
| 4136 return; | |
| 4137 } | |
| 4138 } | |
| 4139 | |
| 4140 void ClassFileParser::verify_legal_method_modifiers( | |
|
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4141 jint flags, bool is_interface, Symbol* name, TRAPS) { |
| 0 | 4142 if (!_need_verify) { return; } |
| 4143 | |
| 4144 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 4145 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 4146 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 4147 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 4148 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
| 4149 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 4150 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
| 4151 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
| 4152 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
| 4153 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 4154 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
| 4155 | |
| 4156 bool is_illegal = false; | |
| 4157 | |
| 4158 if (is_interface) { | |
| 4159 if (!is_abstract || !is_public || is_static || is_final || | |
| 4160 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
| 4161 is_illegal = true; | |
| 4162 } | |
| 4163 } else { // not interface | |
| 4164 if (is_initializer) { | |
| 4165 if (is_static || is_final || is_synchronized || is_native || | |
| 4166 is_abstract || (major_gte_15 && is_bridge)) { | |
| 4167 is_illegal = true; | |
| 4168 } | |
| 4169 } else { // not initializer | |
| 4170 if (is_abstract) { | |
| 4171 if ((is_final || is_native || is_private || is_static || | |
| 4172 (major_gte_15 && (is_synchronized || is_strict)))) { | |
| 4173 is_illegal = true; | |
| 4174 } | |
| 4175 } | |
| 4176 if (has_illegal_visibility(flags)) { | |
| 4177 is_illegal = true; | |
| 4178 } | |
| 4179 } | |
| 4180 } | |
| 4181 | |
| 4182 if (is_illegal) { | |
| 4183 ResourceMark rm(THREAD); | |
| 4184 Exceptions::fthrow( | |
| 4185 THREAD_AND_LOCATION, | |
|
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4186 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4187 "Method %s in class %s has illegal modifiers: 0x%X", |
| 4188 name->as_C_string(), _class_name->as_C_string(), flags); | |
| 4189 return; | |
| 4190 } | |
| 4191 } | |
| 4192 | |
| 4193 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
| 4194 assert(_need_verify, "only called when _need_verify is true"); | |
| 4195 int i = 0; | |
| 4196 int count = length >> 2; | |
| 4197 for (int k=0; k<count; k++) { | |
| 4198 unsigned char b0 = buffer[i]; | |
| 4199 unsigned char b1 = buffer[i+1]; | |
| 4200 unsigned char b2 = buffer[i+2]; | |
| 4201 unsigned char b3 = buffer[i+3]; | |
| 4202 // For an unsigned char v, | |
| 4203 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
| 4204 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
| 4205 unsigned char res = b0 | b0 - 1 | | |
| 4206 b1 | b1 - 1 | | |
| 4207 b2 | b2 - 1 | | |
| 4208 b3 | b3 - 1; | |
| 4209 if (res >= 128) break; | |
| 4210 i += 4; | |
| 4211 } | |
| 4212 for(; i < length; i++) { | |
| 4213 unsigned short c; | |
| 4214 // no embedded zeros | |
| 4215 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4216 if(buffer[i] < 128) { | |
| 4217 continue; | |
| 4218 } | |
| 4219 if ((i + 5) < length) { // see if it's legal supplementary character | |
| 4220 if (UTF8::is_supplementary_character(&buffer[i])) { | |
| 4221 c = UTF8::get_supplementary_character(&buffer[i]); | |
| 4222 i += 5; | |
| 4223 continue; | |
| 4224 } | |
| 4225 } | |
| 4226 switch (buffer[i] >> 4) { | |
| 4227 default: break; | |
| 4228 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
| 4229 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4230 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
| 4231 c = (buffer[i] & 0x1F) << 6; | |
| 4232 i++; | |
| 4233 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 4234 c += buffer[i] & 0x3F; | |
| 4235 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
| 4236 // for classes with major > 47, c must a null or a character in its shortest form | |
| 4237 break; | |
| 4238 } | |
| 4239 } | |
| 4240 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4241 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
| 4242 c = (buffer[i] & 0xF) << 12; | |
| 4243 i += 2; | |
| 4244 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 4245 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
| 4246 if (_major_version <= 47 || c >= 0x800) { | |
| 4247 // for classes with major > 47, c must be in its shortest form | |
| 4248 break; | |
| 4249 } | |
| 4250 } | |
| 4251 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4252 } // end of switch | |
| 4253 } // end of for | |
| 4254 } | |
| 4255 | |
| 4256 // Checks if name is a legal class name. | |
|
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4257 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) { |
| 0 | 4258 if (!_need_verify || _relax_verify) { return; } |
| 4259 | |
| 4260 char buf[fixed_buffer_size]; | |
| 4261 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4262 unsigned int length = name->utf8_length(); | |
| 4263 bool legal = false; | |
| 4264 | |
| 4265 if (length > 0) { | |
| 4266 char* p; | |
| 4267 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
| 4268 p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 4269 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4270 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 4271 if (bytes[0] != '<') { | |
| 4272 p = skip_over_field_name(bytes, true, length); | |
| 4273 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4274 } | |
| 4275 } else { | |
| 4276 // 4900761: relax the constraints based on JSR202 spec | |
| 4277 // Class names may be drawn from the entire Unicode character set. | |
| 4278 // Identifiers between '/' must be unqualified names. | |
| 4279 // The utf8 string has been verified when parsing cpool entries. | |
| 4280 legal = verify_unqualified_name(bytes, length, LegalClass); | |
| 4281 } | |
| 4282 } | |
| 4283 if (!legal) { | |
| 4284 ResourceMark rm(THREAD); | |
| 4285 Exceptions::fthrow( | |
| 4286 THREAD_AND_LOCATION, | |
|
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4287 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4288 "Illegal class name \"%s\" in class file %s", bytes, |
| 4289 _class_name->as_C_string() | |
| 4290 ); | |
| 4291 return; | |
| 4292 } | |
| 4293 } | |
| 4294 | |
| 4295 // Checks if name is a legal field name. | |
|
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4296 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) { |
| 0 | 4297 if (!_need_verify || _relax_verify) { return; } |
| 4298 | |
| 4299 char buf[fixed_buffer_size]; | |
| 4300 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4301 unsigned int length = name->utf8_length(); | |
| 4302 bool legal = false; | |
| 4303 | |
| 4304 if (length > 0) { | |
| 4305 if (_major_version < JAVA_1_5_VERSION) { | |
| 4306 if (bytes[0] != '<') { | |
| 4307 char* p = skip_over_field_name(bytes, false, length); | |
| 4308 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4309 } | |
| 4310 } else { | |
| 4311 // 4881221: relax the constraints based on JSR202 spec | |
| 4312 legal = verify_unqualified_name(bytes, length, LegalField); | |
| 4313 } | |
| 4314 } | |
| 4315 | |
| 4316 if (!legal) { | |
| 4317 ResourceMark rm(THREAD); | |
| 4318 Exceptions::fthrow( | |
| 4319 THREAD_AND_LOCATION, | |
|
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4320 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4321 "Illegal field name \"%s\" in class %s", bytes, |
| 4322 _class_name->as_C_string() | |
| 4323 ); | |
| 4324 return; | |
| 4325 } | |
| 4326 } | |
| 4327 | |
| 4328 // Checks if name is a legal method name. | |
|
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4329 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) { |
| 0 | 4330 if (!_need_verify || _relax_verify) { return; } |
| 4331 | |
|
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4332 assert(name != NULL, "method name is null"); |
| 0 | 4333 char buf[fixed_buffer_size]; |
| 4334 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4335 unsigned int length = name->utf8_length(); | |
| 4336 bool legal = false; | |
| 4337 | |
| 4338 if (length > 0) { | |
| 4339 if (bytes[0] == '<') { | |
| 4340 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
| 4341 legal = true; | |
| 4342 } | |
| 4343 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 4344 char* p; | |
| 4345 p = skip_over_field_name(bytes, false, length); | |
| 4346 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4347 } else { | |
| 4348 // 4881221: relax the constraints based on JSR202 spec | |
| 4349 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
| 4350 } | |
| 4351 } | |
| 4352 | |
| 4353 if (!legal) { | |
| 4354 ResourceMark rm(THREAD); | |
| 4355 Exceptions::fthrow( | |
| 4356 THREAD_AND_LOCATION, | |
|
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4357 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4358 "Illegal method name \"%s\" in class %s", bytes, |
| 4359 _class_name->as_C_string() | |
| 4360 ); | |
| 4361 return; | |
| 4362 } | |
| 4363 } | |
| 4364 | |
| 4365 | |
| 4366 // Checks if signature is a legal field signature. | |
|
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4367 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) { |
| 0 | 4368 if (!_need_verify) { return; } |
| 4369 | |
| 4370 char buf[fixed_buffer_size]; | |
| 4371 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4372 unsigned int length = signature->utf8_length(); | |
| 4373 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 4374 | |
| 4375 if (p == NULL || (p - bytes) != (int)length) { | |
|
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4376 throwIllegalSignature("Field", name, signature, CHECK); |
| 0 | 4377 } |
| 4378 } | |
| 4379 | |
| 4380 // Checks if signature is a legal method signature. | |
| 4381 // Returns number of parameters | |
|
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4382 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) { |
| 0 | 4383 if (!_need_verify) { |
| 4384 // make sure caller's args_size will be less than 0 even for non-static | |
| 4385 // method so it will be recomputed in compute_size_of_parameters(). | |
| 4386 return -2; | |
| 4387 } | |
| 4388 | |
| 4389 unsigned int args_size = 0; | |
| 4390 char buf[fixed_buffer_size]; | |
| 4391 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4392 unsigned int length = signature->utf8_length(); | |
| 4393 char* nextp; | |
| 4394 | |
| 4395 // The first character must be a '(' | |
| 4396 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
| 4397 length--; | |
| 4398 // Skip over legal field signatures | |
| 4399 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 4400 while ((length > 0) && (nextp != NULL)) { | |
| 4401 args_size++; | |
| 4402 if (p[0] == 'J' || p[0] == 'D') { | |
| 4403 args_size++; | |
| 4404 } | |
| 4405 length -= nextp - p; | |
| 4406 p = nextp; | |
| 4407 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 4408 } | |
| 4409 // The first non-signature thing better be a ')' | |
| 4410 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
| 4411 length--; | |
| 4412 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
| 4413 // All internal methods must return void | |
| 4414 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
| 4415 return args_size; | |
| 4416 } | |
| 4417 } else { | |
| 4418 // Now we better just have a return value | |
| 4419 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
| 4420 if (nextp && ((int)length == (nextp - p))) { | |
| 4421 return args_size; | |
| 4422 } | |
| 4423 } | |
| 4424 } | |
| 4425 } | |
| 4426 // Report error | |
|
1586
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6930553: classfile format checker allows invalid method descriptor in CONSTANT_NameAndType_info in some cases
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1513
diff
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|
4427 throwIllegalSignature("Method", name, signature, CHECK_0); |
| 0 | 4428 return 0; |
| 4429 } | |
| 4430 | |
| 4431 | |
|
1881
6412b3805cd6
6891959: HotSpot should not throw ClassFormatError if a class has a field with '>' and/or '<' in its name
kamg
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1847
diff
changeset
|
4432 // Unqualified names may not contain the characters '.', ';', '[', or '/'. |
|
6412b3805cd6
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kamg
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1847
diff
changeset
|
4433 // Method names also may not contain the characters '<' or '>', unless <init> |
|
6412b3805cd6
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kamg
parents:
1847
diff
changeset
|
4434 // or <clinit>. Note that method names may not be <init> or <clinit> in this |
|
6412b3805cd6
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kamg
parents:
1847
diff
changeset
|
4435 // method. Because these names have been checked as special cases before |
|
6412b3805cd6
6891959: HotSpot should not throw ClassFormatError if a class has a field with '>' and/or '<' in its name
kamg
parents:
1847
diff
changeset
|
4436 // calling this method in verify_legal_method_name. |
|
6412b3805cd6
6891959: HotSpot should not throw ClassFormatError if a class has a field with '>' and/or '<' in its name
kamg
parents:
1847
diff
changeset
|
4437 bool ClassFileParser::verify_unqualified_name( |
|
6412b3805cd6
6891959: HotSpot should not throw ClassFormatError if a class has a field with '>' and/or '<' in its name
kamg
parents:
1847
diff
changeset
|
4438 char* name, unsigned int length, int type) { |
| 0 | 4439 jchar ch; |
| 4440 | |
| 4441 for (char* p = name; p != name + length; ) { | |
| 4442 ch = *p; | |
| 4443 if (ch < 128) { | |
| 4444 p++; | |
|
1881
6412b3805cd6
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kamg
parents:
1847
diff
changeset
|
4445 if (ch == '.' || ch == ';' || ch == '[' ) { |
|
6412b3805cd6
6891959: HotSpot should not throw ClassFormatError if a class has a field with '>' and/or '<' in its name
kamg
parents:
1847
diff
changeset
|
4446 return false; // do not permit '.', ';', or '[' |
| 0 | 4447 } |
| 4448 if (type != LegalClass && ch == '/') { | |
| 4449 return false; // do not permit '/' unless it's class name | |
| 4450 } | |
| 4451 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
| 4452 return false; // do not permit '<' or '>' in method names | |
| 4453 } | |
| 4454 } else { | |
| 4455 char* tmp_p = UTF8::next(p, &ch); | |
| 4456 p = tmp_p; | |
| 4457 } | |
| 4458 } | |
| 4459 return true; | |
| 4460 } | |
| 4461 | |
| 4462 | |
| 4463 // Take pointer to a string. Skip over the longest part of the string that could | |
| 4464 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
| 4465 // Return a pointer to just past the fieldname. | |
| 4466 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
| 4467 // being true, we saw consecutive slashes (meaning we were looking for a | |
| 4468 // qualified path but found something that was badly-formed). | |
| 4469 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
| 4470 char* p; | |
| 4471 jchar ch; | |
| 4472 jboolean last_is_slash = false; | |
| 4473 jboolean not_first_ch = false; | |
| 4474 | |
| 4475 for (p = name; p != name + length; not_first_ch = true) { | |
| 4476 char* old_p = p; | |
| 4477 ch = *p; | |
| 4478 if (ch < 128) { | |
| 4479 p++; | |
| 4480 // quick check for ascii | |
| 4481 if ((ch >= 'a' && ch <= 'z') || | |
| 4482 (ch >= 'A' && ch <= 'Z') || | |
| 4483 (ch == '_' || ch == '$') || | |
| 4484 (not_first_ch && ch >= '0' && ch <= '9')) { | |
| 4485 last_is_slash = false; | |
| 4486 continue; | |
| 4487 } | |
| 4488 if (slash_ok && ch == '/') { | |
| 4489 if (last_is_slash) { | |
| 4490 return NULL; // Don't permit consecutive slashes | |
| 4491 } | |
| 4492 last_is_slash = true; | |
| 4493 continue; | |
| 4494 } | |
| 4495 } else { | |
| 4496 jint unicode_ch; | |
| 4497 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
| 4498 p = tmp_p; | |
| 4499 last_is_slash = false; | |
| 4500 // Check if ch is Java identifier start or is Java identifier part | |
| 4501 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
| 4502 EXCEPTION_MARK; | |
| 1142 | 4503 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass()); |
| 0 | 4504 |
| 4505 // return value | |
| 4506 JavaValue result(T_BOOLEAN); | |
| 4507 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
| 4508 JavaCallArguments args; | |
| 4509 args.push_int(unicode_ch); | |
| 4510 | |
| 4511 // public static boolean isJavaIdentifierStart(char ch); | |
| 4512 JavaCalls::call_static(&result, | |
| 4513 klass, | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2085
diff
changeset
|
4514 vmSymbols::isJavaIdentifierStart_name(), |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2085
diff
changeset
|
4515 vmSymbols::int_bool_signature(), |
| 0 | 4516 &args, |
| 4517 THREAD); | |
| 4518 | |
| 4519 if (HAS_PENDING_EXCEPTION) { | |
| 4520 CLEAR_PENDING_EXCEPTION; | |
| 4521 return 0; | |
| 4522 } | |
| 4523 if (result.get_jboolean()) { | |
| 4524 continue; | |
| 4525 } | |
| 4526 | |
| 4527 if (not_first_ch) { | |
| 4528 // public static boolean isJavaIdentifierPart(char ch); | |
| 4529 JavaCalls::call_static(&result, | |
| 4530 klass, | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2085
diff
changeset
|
4531 vmSymbols::isJavaIdentifierPart_name(), |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2085
diff
changeset
|
4532 vmSymbols::int_bool_signature(), |
| 0 | 4533 &args, |
| 4534 THREAD); | |
| 4535 | |
| 4536 if (HAS_PENDING_EXCEPTION) { | |
| 4537 CLEAR_PENDING_EXCEPTION; | |
| 4538 return 0; | |
| 4539 } | |
| 4540 | |
| 4541 if (result.get_jboolean()) { | |
| 4542 continue; | |
| 4543 } | |
| 4544 } | |
| 4545 } | |
| 4546 return (not_first_ch) ? old_p : NULL; | |
| 4547 } | |
| 4548 return (not_first_ch) ? p : NULL; | |
| 4549 } | |
| 4550 | |
| 4551 | |
| 4552 // Take pointer to a string. Skip over the longest part of the string that could | |
| 4553 // be taken as a field signature. Allow "void" if void_ok. | |
| 4554 // Return a pointer to just past the signature. | |
| 4555 // Return NULL if no legal signature is found. | |
| 4556 char* ClassFileParser::skip_over_field_signature(char* signature, | |
| 4557 bool void_ok, | |
| 4558 unsigned int length, | |
| 4559 TRAPS) { | |
| 4560 unsigned int array_dim = 0; | |
| 4561 while (length > 0) { | |
| 4562 switch (signature[0]) { | |
| 4563 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
| 4564 case JVM_SIGNATURE_BOOLEAN: | |
| 4565 case JVM_SIGNATURE_BYTE: | |
| 4566 case JVM_SIGNATURE_CHAR: | |
| 4567 case JVM_SIGNATURE_SHORT: | |
| 4568 case JVM_SIGNATURE_INT: | |
| 4569 case JVM_SIGNATURE_FLOAT: | |
| 4570 case JVM_SIGNATURE_LONG: | |
| 4571 case JVM_SIGNATURE_DOUBLE: | |
| 4572 return signature + 1; | |
| 4573 case JVM_SIGNATURE_CLASS: { | |
| 4574 if (_major_version < JAVA_1_5_VERSION) { | |
| 4575 // Skip over the class name if one is there | |
| 4576 char* p = skip_over_field_name(signature + 1, true, --length); | |
| 4577 | |
| 4578 // The next character better be a semicolon | |
| 4579 if (p && (p - signature) > 1 && p[0] == ';') { | |
| 4580 return p + 1; | |
| 4581 } | |
| 4582 } else { | |
| 4583 // 4900761: For class version > 48, any unicode is allowed in class name. | |
| 4584 length--; | |
| 4585 signature++; | |
| 4586 while (length > 0 && signature[0] != ';') { | |
| 4587 if (signature[0] == '.') { | |
| 4588 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
| 4589 } | |
| 4590 length--; | |
| 4591 signature++; | |
| 4592 } | |
| 4593 if (signature[0] == ';') { return signature + 1; } | |
| 4594 } | |
| 4595 | |
| 4596 return NULL; | |
| 4597 } | |
| 4598 case JVM_SIGNATURE_ARRAY: | |
| 4599 array_dim++; | |
| 4600 if (array_dim > 255) { | |
| 4601 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
| 4602 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
| 4603 } | |
| 4604 // The rest of what's there better be a legal signature | |
| 4605 signature++; | |
| 4606 length--; | |
| 4607 void_ok = false; | |
| 4608 break; | |
| 4609 | |
| 4610 default: | |
| 4611 return NULL; | |
| 4612 } | |
| 4613 } | |
| 4614 return NULL; | |
| 4615 } |