Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.cpp @ 1608:2389669474a6
Merge
| author | jrose |
|---|---|
| date | Tue, 15 Jun 2010 15:57:36 -0700 |
| parents | 3a9de63b2209 136b78722a08 |
| children | 083fde3b838e |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2009, 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 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_classFileParser.cpp.incl" | |
| 27 | |
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28 // We generally try to create the oops directly when parsing, rather than |
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29 // allocating temporary data structures and copying the bytes twice. A |
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30 // temporary area is only needed when parsing utf8 entries in the constant |
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31 // pool and when parsing line number tables. |
| 0 | 32 |
| 33 // We add assert in debug mode when class format is not checked. | |
| 34 | |
| 35 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE | |
| 36 #define JAVA_MIN_SUPPORTED_VERSION 45 | |
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37 #define JAVA_MAX_SUPPORTED_VERSION 51 |
| 0 | 38 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 |
| 39 | |
| 40 // Used for two backward compatibility reasons: | |
| 41 // - to check for new additions to the class file format in JDK1.5 | |
| 42 // - to check for bug fixes in the format checker in JDK1.5 | |
| 43 #define JAVA_1_5_VERSION 49 | |
| 44 | |
| 45 // Used for backward compatibility reasons: | |
| 46 // - to check for javac bug fixes that happened after 1.5 | |
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47 // - also used as the max version when running in jdk6 |
| 0 | 48 #define JAVA_6_VERSION 50 |
| 49 | |
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50 // Used for backward compatibility reasons: |
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51 // - to check NameAndType_info signatures more aggressively |
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52 #define JAVA_7_VERSION 51 |
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53 |
| 0 | 54 |
| 55 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) { | |
| 56 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize | |
| 57 // this function (_current can be allocated in a register, with scalar | |
| 58 // replacement of aggregates). The _current pointer is copied back to | |
| 59 // stream() when this function returns. DON'T call another method within | |
| 60 // this method that uses stream(). | |
| 61 ClassFileStream* cfs0 = stream(); | |
| 62 ClassFileStream cfs1 = *cfs0; | |
| 63 ClassFileStream* cfs = &cfs1; | |
| 64 #ifdef ASSERT | |
| 65 u1* old_current = cfs0->current(); | |
| 66 #endif | |
| 67 | |
| 68 // Used for batching symbol allocations. | |
| 69 const char* names[SymbolTable::symbol_alloc_batch_size]; | |
| 70 int lengths[SymbolTable::symbol_alloc_batch_size]; | |
| 71 int indices[SymbolTable::symbol_alloc_batch_size]; | |
| 72 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; | |
| 73 int names_count = 0; | |
| 74 | |
| 75 // parsing Index 0 is unused | |
| 76 for (int index = 1; index < length; index++) { | |
| 77 // Each of the following case guarantees one more byte in the stream | |
| 78 // for the following tag or the access_flags following constant pool, | |
| 79 // so we don't need bounds-check for reading tag. | |
| 80 u1 tag = cfs->get_u1_fast(); | |
| 81 switch (tag) { | |
| 82 case JVM_CONSTANT_Class : | |
| 83 { | |
| 84 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags | |
| 85 u2 name_index = cfs->get_u2_fast(); | |
| 86 cp->klass_index_at_put(index, name_index); | |
| 87 } | |
| 88 break; | |
| 89 case JVM_CONSTANT_Fieldref : | |
| 90 { | |
| 91 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 92 u2 class_index = cfs->get_u2_fast(); | |
| 93 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 94 cp->field_at_put(index, class_index, name_and_type_index); | |
| 95 } | |
| 96 break; | |
| 97 case JVM_CONSTANT_Methodref : | |
| 98 { | |
| 99 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 100 u2 class_index = cfs->get_u2_fast(); | |
| 101 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 102 cp->method_at_put(index, class_index, name_and_type_index); | |
| 103 } | |
| 104 break; | |
| 105 case JVM_CONSTANT_InterfaceMethodref : | |
| 106 { | |
| 107 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 108 u2 class_index = cfs->get_u2_fast(); | |
| 109 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 110 cp->interface_method_at_put(index, class_index, name_and_type_index); | |
| 111 } | |
| 112 break; | |
| 113 case JVM_CONSTANT_String : | |
| 114 { | |
| 115 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags | |
| 116 u2 string_index = cfs->get_u2_fast(); | |
| 117 cp->string_index_at_put(index, string_index); | |
| 118 } | |
| 119 break; | |
| 1602 | 120 case JVM_CONSTANT_MethodHandle : |
| 121 case JVM_CONSTANT_MethodType : | |
| 122 if (!EnableMethodHandles || | |
| 123 _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
| 124 classfile_parse_error( | |
| 125 (!EnableInvokeDynamic ? | |
| 126 "This JVM does not support constant tag %u in class file %s" : | |
| 127 "Class file version does not support constant tag %u in class file %s"), | |
| 128 tag, CHECK); | |
| 129 } | |
| 130 if (tag == JVM_CONSTANT_MethodHandle) { | |
| 131 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags | |
| 132 u1 ref_kind = cfs->get_u1_fast(); | |
| 133 u2 method_index = cfs->get_u2_fast(); | |
| 134 cp->method_handle_index_at_put(index, ref_kind, method_index); | |
| 135 } else if (tag == JVM_CONSTANT_MethodType) { | |
| 136 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags | |
| 137 u2 signature_index = cfs->get_u2_fast(); | |
| 138 cp->method_type_index_at_put(index, signature_index); | |
| 139 } else { | |
| 140 ShouldNotReachHere(); | |
| 141 } | |
| 142 break; | |
| 0 | 143 case JVM_CONSTANT_Integer : |
| 144 { | |
| 145 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 146 u4 bytes = cfs->get_u4_fast(); | |
| 147 cp->int_at_put(index, (jint) bytes); | |
| 148 } | |
| 149 break; | |
| 150 case JVM_CONSTANT_Float : | |
| 151 { | |
| 152 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 153 u4 bytes = cfs->get_u4_fast(); | |
| 154 cp->float_at_put(index, *(jfloat*)&bytes); | |
| 155 } | |
| 156 break; | |
| 157 case JVM_CONSTANT_Long : | |
| 158 // A mangled type might cause you to overrun allocated memory | |
| 159 guarantee_property(index+1 < length, | |
| 160 "Invalid constant pool entry %u in class file %s", | |
| 161 index, CHECK); | |
| 162 { | |
| 163 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 164 u8 bytes = cfs->get_u8_fast(); | |
| 165 cp->long_at_put(index, bytes); | |
| 166 } | |
| 167 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 168 break; | |
| 169 case JVM_CONSTANT_Double : | |
| 170 // A mangled type might cause you to overrun allocated memory | |
| 171 guarantee_property(index+1 < length, | |
| 172 "Invalid constant pool entry %u in class file %s", | |
| 173 index, CHECK); | |
| 174 { | |
| 175 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 176 u8 bytes = cfs->get_u8_fast(); | |
| 177 cp->double_at_put(index, *(jdouble*)&bytes); | |
| 178 } | |
| 179 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 180 break; | |
| 181 case JVM_CONSTANT_NameAndType : | |
| 182 { | |
| 183 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags | |
| 184 u2 name_index = cfs->get_u2_fast(); | |
| 185 u2 signature_index = cfs->get_u2_fast(); | |
| 186 cp->name_and_type_at_put(index, name_index, signature_index); | |
| 187 } | |
| 188 break; | |
| 189 case JVM_CONSTANT_Utf8 : | |
| 190 { | |
| 191 cfs->guarantee_more(2, CHECK); // utf8_length | |
| 192 u2 utf8_length = cfs->get_u2_fast(); | |
| 193 u1* utf8_buffer = cfs->get_u1_buffer(); | |
| 194 assert(utf8_buffer != NULL, "null utf8 buffer"); | |
| 195 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. | |
| 196 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags | |
| 197 cfs->skip_u1_fast(utf8_length); | |
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198 |
| 0 | 199 // Before storing the symbol, make sure it's legal |
| 200 if (_need_verify) { | |
| 201 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); | |
| 202 } | |
| 203 | |
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204 if (AnonymousClasses && has_cp_patch_at(index)) { |
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205 Handle patch = clear_cp_patch_at(index); |
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206 guarantee_property(java_lang_String::is_instance(patch()), |
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207 "Illegal utf8 patch at %d in class file %s", |
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208 index, CHECK); |
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209 char* str = java_lang_String::as_utf8_string(patch()); |
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210 // (could use java_lang_String::as_symbol instead, but might as well batch them) |
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211 utf8_buffer = (u1*) str; |
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212 utf8_length = (int) strlen(str); |
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213 } |
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214 |
| 0 | 215 unsigned int hash; |
| 216 symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); | |
| 217 if (result == NULL) { | |
| 218 names[names_count] = (char*)utf8_buffer; | |
| 219 lengths[names_count] = utf8_length; | |
| 220 indices[names_count] = index; | |
| 221 hashValues[names_count++] = hash; | |
| 222 if (names_count == SymbolTable::symbol_alloc_batch_size) { | |
| 223 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
| 224 names_count = 0; | |
| 225 } | |
| 226 } else { | |
| 227 cp->symbol_at_put(index, result); | |
| 228 } | |
| 229 } | |
| 230 break; | |
| 231 default: | |
| 232 classfile_parse_error( | |
| 233 "Unknown constant tag %u in class file %s", tag, CHECK); | |
| 234 break; | |
| 235 } | |
| 236 } | |
| 237 | |
| 238 // Allocate the remaining symbols | |
| 239 if (names_count > 0) { | |
| 240 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
| 241 } | |
| 242 | |
| 243 // Copy _current pointer of local copy back to stream(). | |
| 244 #ifdef ASSERT | |
| 245 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); | |
| 246 #endif | |
| 247 cfs0->set_current(cfs1.current()); | |
| 248 } | |
| 249 | |
| 250 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } | |
| 251 | |
| 252 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { | |
| 253 ClassFileStream* cfs = stream(); | |
| 254 constantPoolHandle nullHandle; | |
| 255 | |
| 256 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag | |
| 257 u2 length = cfs->get_u2_fast(); | |
| 258 guarantee_property( | |
| 259 length >= 1, "Illegal constant pool size %u in class file %s", | |
| 260 length, CHECK_(nullHandle)); | |
| 261 constantPoolOop constant_pool = | |
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262 oopFactory::new_constantPool(length, |
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263 methodOopDesc::IsSafeConc, |
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264 CHECK_(nullHandle)); |
| 0 | 265 constantPoolHandle cp (THREAD, constant_pool); |
| 266 | |
| 267 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
| 268 | |
| 269 // parsing constant pool entries | |
| 270 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
| 271 | |
| 272 int index = 1; // declared outside of loops for portability | |
| 273 | |
| 274 // first verification pass - validate cross references and fixup class and string constants | |
| 275 for (index = 1; index < length; index++) { // Index 0 is unused | |
| 276 switch (cp->tag_at(index).value()) { | |
| 277 case JVM_CONSTANT_Class : | |
| 278 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 279 break; | |
| 280 case JVM_CONSTANT_Fieldref : | |
| 281 // fall through | |
| 282 case JVM_CONSTANT_Methodref : | |
| 283 // fall through | |
| 284 case JVM_CONSTANT_InterfaceMethodref : { | |
| 285 if (!_need_verify) break; | |
| 286 int klass_ref_index = cp->klass_ref_index_at(index); | |
| 287 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 288 check_property(valid_cp_range(klass_ref_index, length) && | |
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289 is_klass_reference(cp, klass_ref_index), |
| 0 | 290 "Invalid constant pool index %u in class file %s", |
| 291 klass_ref_index, | |
| 292 CHECK_(nullHandle)); | |
| 293 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
| 294 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
| 295 "Invalid constant pool index %u in class file %s", | |
| 296 name_and_type_ref_index, | |
| 297 CHECK_(nullHandle)); | |
| 298 break; | |
| 299 } | |
| 300 case JVM_CONSTANT_String : | |
| 301 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 302 break; | |
| 303 case JVM_CONSTANT_Integer : | |
| 304 break; | |
| 305 case JVM_CONSTANT_Float : | |
| 306 break; | |
| 307 case JVM_CONSTANT_Long : | |
| 308 case JVM_CONSTANT_Double : | |
| 309 index++; | |
| 310 check_property( | |
| 311 (index < length && cp->tag_at(index).is_invalid()), | |
| 312 "Improper constant pool long/double index %u in class file %s", | |
| 313 index, CHECK_(nullHandle)); | |
| 314 break; | |
| 315 case JVM_CONSTANT_NameAndType : { | |
| 316 if (!_need_verify) break; | |
| 317 int name_ref_index = cp->name_ref_index_at(index); | |
| 318 int signature_ref_index = cp->signature_ref_index_at(index); | |
| 319 check_property( | |
| 320 valid_cp_range(name_ref_index, length) && | |
| 321 cp->tag_at(name_ref_index).is_utf8(), | |
| 322 "Invalid constant pool index %u in class file %s", | |
| 323 name_ref_index, CHECK_(nullHandle)); | |
| 324 check_property( | |
| 325 valid_cp_range(signature_ref_index, length) && | |
| 326 cp->tag_at(signature_ref_index).is_utf8(), | |
| 327 "Invalid constant pool index %u in class file %s", | |
| 328 signature_ref_index, CHECK_(nullHandle)); | |
| 329 break; | |
| 330 } | |
| 331 case JVM_CONSTANT_Utf8 : | |
| 332 break; | |
| 333 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
| 334 case JVM_CONSTANT_UnresolvedClassInError: | |
| 335 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 336 break; | |
| 337 case JVM_CONSTANT_ClassIndex : | |
| 338 { | |
| 339 int class_index = cp->klass_index_at(index); | |
| 340 check_property( | |
| 341 valid_cp_range(class_index, length) && | |
| 342 cp->tag_at(class_index).is_utf8(), | |
| 343 "Invalid constant pool index %u in class file %s", | |
| 344 class_index, CHECK_(nullHandle)); | |
| 345 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
| 346 } | |
| 347 break; | |
| 348 case JVM_CONSTANT_UnresolvedString : | |
| 349 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 350 break; | |
| 351 case JVM_CONSTANT_StringIndex : | |
| 352 { | |
| 353 int string_index = cp->string_index_at(index); | |
| 354 check_property( | |
| 355 valid_cp_range(string_index, length) && | |
| 356 cp->tag_at(string_index).is_utf8(), | |
| 357 "Invalid constant pool index %u in class file %s", | |
| 358 string_index, CHECK_(nullHandle)); | |
| 359 symbolOop sym = cp->symbol_at(string_index); | |
| 360 cp->unresolved_string_at_put(index, sym); | |
| 361 } | |
| 362 break; | |
| 1602 | 363 case JVM_CONSTANT_MethodHandle : |
| 364 { | |
| 365 int ref_index = cp->method_handle_index_at(index); | |
| 366 check_property( | |
| 367 valid_cp_range(ref_index, length) && | |
| 368 EnableMethodHandles, | |
| 369 "Invalid constant pool index %u in class file %s", | |
| 370 ref_index, CHECK_(nullHandle)); | |
| 371 constantTag tag = cp->tag_at(ref_index); | |
| 372 int ref_kind = cp->method_handle_ref_kind_at(index); | |
| 373 switch (ref_kind) { | |
| 374 case JVM_REF_getField: | |
| 375 case JVM_REF_getStatic: | |
| 376 case JVM_REF_putField: | |
| 377 case JVM_REF_putStatic: | |
| 378 check_property( | |
| 379 tag.is_field(), | |
| 380 "Invalid constant pool index %u in class file %s (not a field)", | |
| 381 ref_index, CHECK_(nullHandle)); | |
| 382 break; | |
| 383 case JVM_REF_invokeVirtual: | |
| 384 case JVM_REF_invokeStatic: | |
| 385 case JVM_REF_invokeSpecial: | |
| 386 case JVM_REF_newInvokeSpecial: | |
| 387 check_property( | |
| 388 tag.is_method(), | |
| 389 "Invalid constant pool index %u in class file %s (not a method)", | |
| 390 ref_index, CHECK_(nullHandle)); | |
| 391 break; | |
| 392 case JVM_REF_invokeInterface: | |
| 393 check_property( | |
| 394 tag.is_interface_method(), | |
| 395 "Invalid constant pool index %u in class file %s (not an interface method)", | |
| 396 ref_index, CHECK_(nullHandle)); | |
| 397 break; | |
| 398 default: | |
| 399 classfile_parse_error( | |
| 400 "Bad method handle kind at constant pool index %u in class file %s", | |
| 401 index, CHECK_(nullHandle)); | |
| 402 } | |
| 403 // Keep the ref_index unchanged. It will be indirected at link-time. | |
| 404 } | |
| 405 break; | |
| 406 case JVM_CONSTANT_MethodType : | |
| 407 { | |
| 408 int ref_index = cp->method_type_index_at(index); | |
| 409 check_property( | |
| 410 valid_cp_range(ref_index, length) && | |
| 411 cp->tag_at(ref_index).is_utf8() && | |
| 412 EnableMethodHandles, | |
| 413 "Invalid constant pool index %u in class file %s", | |
| 414 ref_index, CHECK_(nullHandle)); | |
| 415 } | |
| 416 break; | |
| 0 | 417 default: |
|
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418 fatal(err_msg("bad constant pool tag value %u", |
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419 cp->tag_at(index).value())); |
| 0 | 420 ShouldNotReachHere(); |
| 421 break; | |
| 422 } // end of switch | |
| 423 } // end of for | |
| 424 | |
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425 if (_cp_patches != NULL) { |
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426 // need to treat this_class specially... |
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427 assert(AnonymousClasses, ""); |
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428 int this_class_index; |
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429 { |
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430 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len |
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431 u1* mark = cfs->current(); |
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432 u2 flags = cfs->get_u2_fast(); |
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433 this_class_index = cfs->get_u2_fast(); |
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434 cfs->set_current(mark); // revert to mark |
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435 } |
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436 |
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437 for (index = 1; index < length; index++) { // Index 0 is unused |
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438 if (has_cp_patch_at(index)) { |
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439 guarantee_property(index != this_class_index, |
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440 "Illegal constant pool patch to self at %d in class file %s", |
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441 index, CHECK_(nullHandle)); |
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442 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle)); |
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443 } |
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444 } |
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445 // Ensure that all the patches have been used. |
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446 for (index = 0; index < _cp_patches->length(); index++) { |
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447 guarantee_property(!has_cp_patch_at(index), |
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448 "Unused constant pool patch at %d in class file %s", |
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449 index, CHECK_(nullHandle)); |
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450 } |
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451 } |
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452 |
| 0 | 453 if (!_need_verify) { |
| 454 return cp; | |
| 455 } | |
| 456 | |
| 457 // second verification pass - checks the strings are of the right format. | |
|
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458 // but not yet to the other entries |
| 0 | 459 for (index = 1; index < length; index++) { |
| 460 jbyte tag = cp->tag_at(index).value(); | |
| 461 switch (tag) { | |
| 462 case JVM_CONSTANT_UnresolvedClass: { | |
| 463 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index)); | |
|
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464 // check the name, even if _cp_patches will overwrite it |
| 0 | 465 verify_legal_class_name(class_name, CHECK_(nullHandle)); |
| 466 break; | |
| 467 } | |
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468 case JVM_CONSTANT_NameAndType: { |
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469 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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470 int sig_index = cp->signature_ref_index_at(index); |
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471 int name_index = cp->name_ref_index_at(index); |
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472 symbolHandle name(THREAD, cp->symbol_at(name_index)); |
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473 symbolHandle sig(THREAD, cp->symbol_at(sig_index)); |
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474 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { |
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475 verify_legal_method_signature(name, sig, CHECK_(nullHandle)); |
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476 } else { |
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477 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); |
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478 } |
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479 } |
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480 break; |
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481 } |
| 0 | 482 case JVM_CONSTANT_Fieldref: |
| 483 case JVM_CONSTANT_Methodref: | |
| 484 case JVM_CONSTANT_InterfaceMethodref: { | |
| 485 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 486 // already verified to be utf8 | |
| 487 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
| 488 // already verified to be utf8 | |
| 489 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
| 490 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
| 491 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index)); | |
| 492 if (tag == JVM_CONSTANT_Fieldref) { | |
| 493 verify_legal_field_name(name, CHECK_(nullHandle)); | |
|
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494 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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495 // Signature is verified above, when iterating NameAndType_info. |
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496 // Need only to be sure it's the right type. |
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497 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) { |
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498 throwIllegalSignature( |
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499 "Field", name, signature, CHECK_(nullHandle)); |
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500 } |
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501 } else { |
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502 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); |
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503 } |
| 0 | 504 } else { |
| 505 verify_legal_method_name(name, CHECK_(nullHandle)); | |
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506 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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507 // Signature is verified above, when iterating NameAndType_info. |
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508 // Need only to be sure it's the right type. |
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509 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) { |
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510 throwIllegalSignature( |
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511 "Method", name, signature, CHECK_(nullHandle)); |
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512 } |
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513 } else { |
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514 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); |
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515 } |
| 0 | 516 if (tag == JVM_CONSTANT_Methodref) { |
| 517 // 4509014: If a class method name begins with '<', it must be "<init>". | |
| 518 assert(!name.is_null(), "method name in constant pool is null"); | |
| 519 unsigned int name_len = name->utf8_length(); | |
| 520 assert(name_len > 0, "bad method name"); // already verified as legal name | |
| 521 if (name->byte_at(0) == '<') { | |
| 522 if (name() != vmSymbols::object_initializer_name()) { | |
| 523 classfile_parse_error( | |
| 524 "Bad method name at constant pool index %u in class file %s", | |
| 525 name_ref_index, CHECK_(nullHandle)); | |
| 526 } | |
| 527 } | |
| 528 } | |
| 529 } | |
| 530 break; | |
| 531 } | |
| 1602 | 532 case JVM_CONSTANT_MethodHandle: { |
| 533 int ref_index = cp->method_handle_index_at(index); | |
| 534 int ref_kind = cp->method_handle_ref_kind_at(index); | |
| 535 switch (ref_kind) { | |
| 536 case JVM_REF_invokeVirtual: | |
| 537 case JVM_REF_invokeStatic: | |
| 538 case JVM_REF_invokeSpecial: | |
| 539 case JVM_REF_newInvokeSpecial: | |
| 540 { | |
| 541 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index); | |
| 542 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
| 543 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
| 544 if (ref_kind == JVM_REF_newInvokeSpecial) { | |
| 545 if (name() != vmSymbols::object_initializer_name()) { | |
| 546 classfile_parse_error( | |
| 547 "Bad constructor name at constant pool index %u in class file %s", | |
| 548 name_ref_index, CHECK_(nullHandle)); | |
| 549 } | |
| 550 } else { | |
| 551 if (name() == vmSymbols::object_initializer_name()) { | |
| 552 classfile_parse_error( | |
| 553 "Bad method name at constant pool index %u in class file %s", | |
| 554 name_ref_index, CHECK_(nullHandle)); | |
| 555 } | |
| 556 } | |
| 557 } | |
| 558 break; | |
| 559 // Other ref_kinds are already fully checked in previous pass. | |
| 560 } | |
| 561 break; | |
| 562 } | |
| 563 case JVM_CONSTANT_MethodType: { | |
| 564 symbolHandle no_name = vmSymbolHandles::type_name(); // place holder | |
| 565 symbolHandle signature(THREAD, cp->method_type_signature_at(index)); | |
| 566 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle)); | |
| 567 break; | |
| 568 } | |
| 0 | 569 } // end of switch |
| 570 } // end of for | |
| 571 | |
| 572 return cp; | |
| 573 } | |
| 574 | |
| 575 | |
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576 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) { |
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577 assert(AnonymousClasses, ""); |
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578 BasicType patch_type = T_VOID; |
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579 switch (cp->tag_at(index).value()) { |
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580 |
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581 case JVM_CONSTANT_UnresolvedClass : |
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582 // Patching a class means pre-resolving it. |
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583 // The name in the constant pool is ignored. |
| 1602 | 584 if (java_lang_Class::is_instance(patch())) { |
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585 guarantee_property(!java_lang_Class::is_primitive(patch()), |
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586 "Illegal class patch at %d in class file %s", |
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587 index, CHECK); |
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588 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch())); |
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589 } else { |
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590 guarantee_property(java_lang_String::is_instance(patch()), |
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591 "Illegal class patch at %d in class file %s", |
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592 index, CHECK); |
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593 symbolHandle name = java_lang_String::as_symbol(patch(), CHECK); |
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594 cp->unresolved_klass_at_put(index, name()); |
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595 } |
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596 break; |
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597 |
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598 case JVM_CONSTANT_UnresolvedString : |
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599 // Patching a string means pre-resolving it. |
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600 // The spelling in the constant pool is ignored. |
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601 // The constant reference may be any object whatever. |
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602 // If it is not a real interned string, the constant is referred |
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603 // to as a "pseudo-string", and must be presented to the CP |
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604 // explicitly, because it may require scavenging. |
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605 cp->pseudo_string_at_put(index, patch()); |
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606 break; |
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607 |
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608 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim; |
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609 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim; |
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610 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim; |
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611 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim; |
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612 patch_prim: |
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613 { |
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614 jvalue value; |
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615 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); |
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616 guarantee_property(value_type == patch_type, |
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617 "Illegal primitive patch at %d in class file %s", |
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618 index, CHECK); |
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619 switch (value_type) { |
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620 case T_INT: cp->int_at_put(index, value.i); break; |
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621 case T_FLOAT: cp->float_at_put(index, value.f); break; |
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622 case T_LONG: cp->long_at_put(index, value.j); break; |
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623 case T_DOUBLE: cp->double_at_put(index, value.d); break; |
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624 default: assert(false, ""); |
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625 } |
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626 } |
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627 break; |
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628 |
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629 default: |
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630 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. |
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631 guarantee_property(!has_cp_patch_at(index), |
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632 "Illegal unexpected patch at %d in class file %s", |
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633 index, CHECK); |
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634 return; |
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635 } |
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636 |
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637 // On fall-through, mark the patch as used. |
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638 clear_cp_patch_at(index); |
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639 } |
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640 |
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641 |
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642 |
| 0 | 643 class NameSigHash: public ResourceObj { |
| 644 public: | |
| 645 symbolOop _name; // name | |
| 646 symbolOop _sig; // signature | |
| 647 NameSigHash* _next; // Next entry in hash table | |
| 648 }; | |
| 649 | |
| 650 | |
| 651 #define HASH_ROW_SIZE 256 | |
| 652 | |
| 653 unsigned int hash(symbolOop name, symbolOop sig) { | |
| 654 unsigned int raw_hash = 0; | |
| 655 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
| 656 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
| 657 | |
| 658 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
| 659 } | |
| 660 | |
| 661 | |
| 662 void initialize_hashtable(NameSigHash** table) { | |
| 663 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
| 664 } | |
| 665 | |
| 666 // Return false if the name/sig combination is found in table. | |
| 667 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
| 668 // The old format checker uses heap sort to find duplicates. | |
| 669 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
| 670 // of table since we don't expect symbolOop's to move. | |
| 671 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) { | |
| 672 assert(name != NULL, "name in constant pool is NULL"); | |
| 673 | |
| 674 // First lookup for duplicates | |
| 675 int index = hash(name, sig); | |
| 676 NameSigHash* entry = table[index]; | |
| 677 while (entry != NULL) { | |
| 678 if (entry->_name == name && entry->_sig == sig) { | |
| 679 return false; | |
| 680 } | |
| 681 entry = entry->_next; | |
| 682 } | |
| 683 | |
| 684 // No duplicate is found, allocate a new entry and fill it. | |
| 685 entry = new NameSigHash(); | |
| 686 entry->_name = name; | |
| 687 entry->_sig = sig; | |
| 688 | |
| 689 // Insert into hash table | |
| 690 entry->_next = table[index]; | |
| 691 table[index] = entry; | |
| 692 | |
| 693 return true; | |
| 694 } | |
| 695 | |
| 696 | |
| 697 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
| 698 int length, | |
| 699 Handle class_loader, | |
| 700 Handle protection_domain, | |
| 701 symbolHandle class_name, | |
| 702 TRAPS) { | |
| 703 ClassFileStream* cfs = stream(); | |
| 704 assert(length > 0, "only called for length>0"); | |
| 705 objArrayHandle nullHandle; | |
| 706 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 707 objArrayHandle interfaces (THREAD, interface_oop); | |
| 708 | |
| 709 int index; | |
| 710 for (index = 0; index < length; index++) { | |
| 711 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
|
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712 KlassHandle interf; |
| 0 | 713 check_property( |
| 714 valid_cp_range(interface_index, cp->length()) && | |
|
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715 is_klass_reference(cp, interface_index), |
| 0 | 716 "Interface name has bad constant pool index %u in class file %s", |
| 717 interface_index, CHECK_(nullHandle)); | |
|
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718 if (cp->tag_at(interface_index).is_klass()) { |
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719 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); |
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720 } else { |
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721 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index)); |
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722 |
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723 // Don't need to check legal name because it's checked when parsing constant pool. |
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724 // But need to make sure it's not an array type. |
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725 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, |
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726 "Bad interface name in class file %s", CHECK_(nullHandle)); |
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727 |
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728 // Call resolve_super so classcircularity is checked |
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729 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, |
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730 unresolved_klass, class_loader, protection_domain, |
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731 false, CHECK_(nullHandle)); |
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732 interf = KlassHandle(THREAD, k); |
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733 |
|
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734 if (LinkWellKnownClasses) // my super type is well known to me |
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735 cp->klass_at_put(interface_index, interf()); // eagerly resolve |
|
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736 } |
| 0 | 737 |
| 738 if (!Klass::cast(interf())->is_interface()) { | |
| 739 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
| 740 } | |
| 741 interfaces->obj_at_put(index, interf()); | |
| 742 } | |
| 743 | |
| 744 if (!_need_verify || length <= 1) { | |
| 745 return interfaces; | |
| 746 } | |
| 747 | |
| 748 // Check if there's any duplicates in interfaces | |
| 749 ResourceMark rm(THREAD); | |
| 750 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 751 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 752 initialize_hashtable(interface_names); | |
| 753 bool dup = false; | |
| 754 { | |
| 755 debug_only(No_Safepoint_Verifier nsv;) | |
| 756 for (index = 0; index < length; index++) { | |
| 757 klassOop k = (klassOop)interfaces->obj_at(index); | |
| 758 symbolOop name = instanceKlass::cast(k)->name(); | |
| 759 // If no duplicates, add (name, NULL) in hashtable interface_names. | |
| 760 if (!put_after_lookup(name, NULL, interface_names)) { | |
| 761 dup = true; | |
| 762 break; | |
| 763 } | |
| 764 } | |
| 765 } | |
| 766 if (dup) { | |
| 767 classfile_parse_error("Duplicate interface name in class file %s", | |
| 768 CHECK_(nullHandle)); | |
| 769 } | |
| 770 | |
| 771 return interfaces; | |
| 772 } | |
| 773 | |
| 774 | |
| 775 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
| 776 // Make sure the constant pool entry is of a type appropriate to this field | |
| 777 guarantee_property( | |
| 778 (constantvalue_index > 0 && | |
| 779 constantvalue_index < cp->length()), | |
| 780 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
| 781 constantvalue_index, CHECK); | |
| 782 constantTag value_type = cp->tag_at(constantvalue_index); | |
| 783 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
| 784 case T_LONG: | |
| 785 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
| 786 break; | |
| 787 case T_FLOAT: | |
| 788 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
| 789 break; | |
| 790 case T_DOUBLE: | |
| 791 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
| 792 break; | |
| 793 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
| 794 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
| 795 break; | |
| 796 case T_OBJECT: | |
|
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797 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") |
| 0 | 798 && (value_type.is_string() || value_type.is_unresolved_string())), |
| 799 "Bad string initial value in class file %s", CHECK); | |
| 800 break; | |
| 801 default: | |
| 802 classfile_parse_error( | |
| 803 "Unable to set initial value %u in class file %s", | |
| 804 constantvalue_index, CHECK); | |
| 805 } | |
| 806 } | |
| 807 | |
| 808 | |
| 809 // Parse attributes for a field. | |
| 810 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
| 811 u2 attributes_count, | |
| 812 bool is_static, u2 signature_index, | |
| 813 u2* constantvalue_index_addr, | |
| 814 bool* is_synthetic_addr, | |
| 815 u2* generic_signature_index_addr, | |
| 816 typeArrayHandle* field_annotations, | |
| 817 TRAPS) { | |
| 818 ClassFileStream* cfs = stream(); | |
| 819 assert(attributes_count > 0, "length should be greater than 0"); | |
| 820 u2 constantvalue_index = 0; | |
| 821 u2 generic_signature_index = 0; | |
| 822 bool is_synthetic = false; | |
| 823 u1* runtime_visible_annotations = NULL; | |
| 824 int runtime_visible_annotations_length = 0; | |
| 825 u1* runtime_invisible_annotations = NULL; | |
| 826 int runtime_invisible_annotations_length = 0; | |
| 827 while (attributes_count--) { | |
| 828 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 829 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 830 u4 attribute_length = cfs->get_u4_fast(); | |
| 831 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
| 832 cp->tag_at(attribute_name_index).is_utf8(), | |
| 833 "Invalid field attribute index %u in class file %s", | |
| 834 attribute_name_index, | |
| 835 CHECK); | |
| 836 symbolOop attribute_name = cp->symbol_at(attribute_name_index); | |
| 837 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { | |
| 838 // ignore if non-static | |
| 839 if (constantvalue_index != 0) { | |
| 840 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
| 841 } | |
| 842 check_property( | |
| 843 attribute_length == 2, | |
| 844 "Invalid ConstantValue field attribute length %u in class file %s", | |
| 845 attribute_length, CHECK); | |
| 846 constantvalue_index = cfs->get_u2(CHECK); | |
| 847 if (_need_verify) { | |
| 848 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
| 849 } | |
| 850 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
| 851 if (attribute_length != 0) { | |
| 852 classfile_parse_error( | |
| 853 "Invalid Synthetic field attribute length %u in class file %s", | |
| 854 attribute_length, CHECK); | |
| 855 } | |
| 856 is_synthetic = true; | |
| 857 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 858 if (attribute_length != 0) { | |
| 859 classfile_parse_error( | |
| 860 "Invalid Deprecated field attribute length %u in class file %s", | |
| 861 attribute_length, CHECK); | |
| 862 } | |
| 863 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 864 if (attribute_name == vmSymbols::tag_signature()) { | |
| 865 if (attribute_length != 2) { | |
| 866 classfile_parse_error( | |
| 867 "Wrong size %u for field's Signature attribute in class file %s", | |
| 868 attribute_length, CHECK); | |
| 869 } | |
| 870 generic_signature_index = cfs->get_u2(CHECK); | |
| 871 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 872 runtime_visible_annotations_length = attribute_length; | |
| 873 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 874 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 875 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 876 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 877 runtime_invisible_annotations_length = attribute_length; | |
| 878 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 879 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 880 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 881 } else { | |
| 882 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 883 } | |
| 884 } else { | |
| 885 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 886 } | |
| 887 } | |
| 888 | |
| 889 *constantvalue_index_addr = constantvalue_index; | |
| 890 *is_synthetic_addr = is_synthetic; | |
| 891 *generic_signature_index_addr = generic_signature_index; | |
| 892 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
| 893 runtime_visible_annotations_length, | |
| 894 runtime_invisible_annotations, | |
| 895 runtime_invisible_annotations_length, | |
| 896 CHECK); | |
| 897 return; | |
| 898 } | |
| 899 | |
| 900 | |
| 901 // Field allocation types. Used for computing field offsets. | |
| 902 | |
| 903 enum FieldAllocationType { | |
| 904 STATIC_OOP, // Oops | |
| 905 STATIC_BYTE, // Boolean, Byte, char | |
| 906 STATIC_SHORT, // shorts | |
| 907 STATIC_WORD, // ints | |
| 908 STATIC_DOUBLE, // long or double | |
| 909 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
| 910 NONSTATIC_OOP, | |
| 911 NONSTATIC_BYTE, | |
| 912 NONSTATIC_SHORT, | |
| 913 NONSTATIC_WORD, | |
| 914 NONSTATIC_DOUBLE, | |
| 915 NONSTATIC_ALIGNED_DOUBLE | |
| 916 }; | |
| 917 | |
| 918 | |
| 919 struct FieldAllocationCount { | |
|
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920 unsigned int static_oop_count; |
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921 unsigned int static_byte_count; |
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922 unsigned int static_short_count; |
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923 unsigned int static_word_count; |
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924 unsigned int static_double_count; |
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925 unsigned int nonstatic_oop_count; |
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926 unsigned int nonstatic_byte_count; |
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927 unsigned int nonstatic_short_count; |
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928 unsigned int nonstatic_word_count; |
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929 unsigned int nonstatic_double_count; |
| 0 | 930 }; |
| 931 | |
| 932 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
| 933 struct FieldAllocationCount *fac, | |
| 934 objArrayHandle* fields_annotations, TRAPS) { | |
| 935 ClassFileStream* cfs = stream(); | |
| 936 typeArrayHandle nullHandle; | |
| 937 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 938 u2 length = cfs->get_u2_fast(); | |
| 939 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
| 940 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
| 941 typeArrayHandle fields(THREAD, new_fields); | |
| 942 | |
| 943 int index = 0; | |
| 944 typeArrayHandle field_annotations; | |
| 945 for (int n = 0; n < length; n++) { | |
| 946 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 947 | |
| 948 AccessFlags access_flags; | |
| 949 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
| 950 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
| 951 access_flags.set_flags(flags); | |
| 952 | |
| 953 u2 name_index = cfs->get_u2_fast(); | |
| 954 int cp_size = cp->length(); | |
| 955 check_property( | |
| 956 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
| 957 "Invalid constant pool index %u for field name in class file %s", | |
| 958 name_index, CHECK_(nullHandle)); | |
| 959 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 960 verify_legal_field_name(name, CHECK_(nullHandle)); | |
| 961 | |
| 962 u2 signature_index = cfs->get_u2_fast(); | |
| 963 check_property( | |
| 964 valid_cp_range(signature_index, cp_size) && | |
| 965 cp->tag_at(signature_index).is_utf8(), | |
| 966 "Invalid constant pool index %u for field signature in class file %s", | |
| 967 signature_index, CHECK_(nullHandle)); | |
| 968 symbolHandle sig(THREAD, cp->symbol_at(signature_index)); | |
| 969 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); | |
| 970 | |
| 971 u2 constantvalue_index = 0; | |
| 972 bool is_synthetic = false; | |
| 973 u2 generic_signature_index = 0; | |
| 974 bool is_static = access_flags.is_static(); | |
| 975 | |
| 976 u2 attributes_count = cfs->get_u2_fast(); | |
| 977 if (attributes_count > 0) { | |
| 978 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
| 979 &constantvalue_index, &is_synthetic, | |
| 980 &generic_signature_index, &field_annotations, | |
| 981 CHECK_(nullHandle)); | |
| 982 if (field_annotations.not_null()) { | |
| 983 if (fields_annotations->is_null()) { | |
| 984 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 985 *fields_annotations = objArrayHandle(THREAD, md); | |
| 986 } | |
| 987 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
| 988 } | |
| 989 if (is_synthetic) { | |
| 990 access_flags.set_is_synthetic(); | |
| 991 } | |
| 992 } | |
| 993 | |
| 994 fields->short_at_put(index++, access_flags.as_short()); | |
| 995 fields->short_at_put(index++, name_index); | |
| 996 fields->short_at_put(index++, signature_index); | |
| 997 fields->short_at_put(index++, constantvalue_index); | |
| 998 | |
| 999 // Remember how many oops we encountered and compute allocation type | |
| 1000 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
| 1001 FieldAllocationType atype; | |
| 1002 if ( is_static ) { | |
| 1003 switch ( type ) { | |
| 1004 case T_BOOLEAN: | |
| 1005 case T_BYTE: | |
| 1006 fac->static_byte_count++; | |
| 1007 atype = STATIC_BYTE; | |
| 1008 break; | |
| 1009 case T_LONG: | |
| 1010 case T_DOUBLE: | |
| 1011 if (Universe::field_type_should_be_aligned(type)) { | |
| 1012 atype = STATIC_ALIGNED_DOUBLE; | |
| 1013 } else { | |
| 1014 atype = STATIC_DOUBLE; | |
| 1015 } | |
| 1016 fac->static_double_count++; | |
| 1017 break; | |
| 1018 case T_CHAR: | |
| 1019 case T_SHORT: | |
| 1020 fac->static_short_count++; | |
| 1021 atype = STATIC_SHORT; | |
| 1022 break; | |
| 1023 case T_FLOAT: | |
| 1024 case T_INT: | |
| 1025 fac->static_word_count++; | |
| 1026 atype = STATIC_WORD; | |
| 1027 break; | |
| 1028 case T_ARRAY: | |
| 1029 case T_OBJECT: | |
| 1030 fac->static_oop_count++; | |
| 1031 atype = STATIC_OOP; | |
| 1032 break; | |
| 1033 case T_ADDRESS: | |
| 1034 case T_VOID: | |
| 1035 default: | |
| 1036 assert(0, "bad field type"); | |
| 1037 } | |
| 1038 } else { | |
| 1039 switch ( type ) { | |
| 1040 case T_BOOLEAN: | |
| 1041 case T_BYTE: | |
| 1042 fac->nonstatic_byte_count++; | |
| 1043 atype = NONSTATIC_BYTE; | |
| 1044 break; | |
| 1045 case T_LONG: | |
| 1046 case T_DOUBLE: | |
| 1047 if (Universe::field_type_should_be_aligned(type)) { | |
| 1048 atype = NONSTATIC_ALIGNED_DOUBLE; | |
| 1049 } else { | |
| 1050 atype = NONSTATIC_DOUBLE; | |
| 1051 } | |
| 1052 fac->nonstatic_double_count++; | |
| 1053 break; | |
| 1054 case T_CHAR: | |
| 1055 case T_SHORT: | |
| 1056 fac->nonstatic_short_count++; | |
| 1057 atype = NONSTATIC_SHORT; | |
| 1058 break; | |
| 1059 case T_FLOAT: | |
| 1060 case T_INT: | |
| 1061 fac->nonstatic_word_count++; | |
| 1062 atype = NONSTATIC_WORD; | |
| 1063 break; | |
| 1064 case T_ARRAY: | |
| 1065 case T_OBJECT: | |
| 1066 fac->nonstatic_oop_count++; | |
| 1067 atype = NONSTATIC_OOP; | |
| 1068 break; | |
| 1069 case T_ADDRESS: | |
| 1070 case T_VOID: | |
| 1071 default: | |
| 1072 assert(0, "bad field type"); | |
| 1073 } | |
| 1074 } | |
| 1075 | |
| 1076 // The correct offset is computed later (all oop fields will be located together) | |
| 1077 // We temporarily store the allocation type in the offset field | |
| 1078 fields->short_at_put(index++, atype); | |
| 1079 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
| 1080 fields->short_at_put(index++, generic_signature_index); | |
| 1081 } | |
| 1082 | |
| 1083 if (_need_verify && length > 1) { | |
| 1084 // Check duplicated fields | |
| 1085 ResourceMark rm(THREAD); | |
| 1086 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1087 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 1088 initialize_hashtable(names_and_sigs); | |
| 1089 bool dup = false; | |
| 1090 { | |
| 1091 debug_only(No_Safepoint_Verifier nsv;) | |
| 1092 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
| 1093 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
| 1094 symbolOop name = cp->symbol_at(name_index); | |
| 1095 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); | |
| 1096 symbolOop sig = cp->symbol_at(sig_index); | |
| 1097 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 1098 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
| 1099 dup = true; | |
| 1100 break; | |
| 1101 } | |
| 1102 } | |
| 1103 } | |
| 1104 if (dup) { | |
| 1105 classfile_parse_error("Duplicate field name&signature in class file %s", | |
| 1106 CHECK_(nullHandle)); | |
| 1107 } | |
| 1108 } | |
| 1109 | |
| 1110 return fields; | |
| 1111 } | |
| 1112 | |
| 1113 | |
| 1114 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
| 1115 while (length-- > 0) { | |
| 1116 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
| 1117 } | |
| 1118 } | |
| 1119 | |
| 1120 | |
| 1121 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
| 1122 u4 exception_table_length, | |
| 1123 constantPoolHandle cp, | |
| 1124 TRAPS) { | |
| 1125 ClassFileStream* cfs = stream(); | |
| 1126 typeArrayHandle nullHandle; | |
| 1127 | |
| 1128 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
| 1129 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
| 1130 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
| 1131 | |
| 1132 int index = 0; | |
| 1133 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
| 1134 for (unsigned int i = 0; i < exception_table_length; i++) { | |
| 1135 u2 start_pc = cfs->get_u2_fast(); | |
| 1136 u2 end_pc = cfs->get_u2_fast(); | |
| 1137 u2 handler_pc = cfs->get_u2_fast(); | |
| 1138 u2 catch_type_index = cfs->get_u2_fast(); | |
| 1139 // Will check legal target after parsing code array in verifier. | |
| 1140 if (_need_verify) { | |
| 1141 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
| 1142 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
| 1143 guarantee_property(handler_pc < code_length, | |
| 1144 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
| 1145 if (catch_type_index != 0) { | |
| 1146 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
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1147 is_klass_reference(cp, catch_type_index), |
| 0 | 1148 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); |
| 1149 } | |
| 1150 } | |
| 1151 exception_handlers->int_at_put(index++, start_pc); | |
| 1152 exception_handlers->int_at_put(index++, end_pc); | |
| 1153 exception_handlers->int_at_put(index++, handler_pc); | |
| 1154 exception_handlers->int_at_put(index++, catch_type_index); | |
| 1155 } | |
| 1156 return exception_handlers; | |
| 1157 } | |
| 1158 | |
| 1159 void ClassFileParser::parse_linenumber_table( | |
| 1160 u4 code_attribute_length, u4 code_length, | |
| 1161 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
| 1162 ClassFileStream* cfs = stream(); | |
| 1163 unsigned int num_entries = cfs->get_u2(CHECK); | |
| 1164 | |
| 1165 // Each entry is a u2 start_pc, and a u2 line_number | |
| 1166 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
| 1167 | |
| 1168 // Verify line number attribute and table length | |
| 1169 check_property( | |
| 1170 code_attribute_length == sizeof(u2) + length_in_bytes, | |
| 1171 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
| 1172 | |
| 1173 cfs->guarantee_more(length_in_bytes, CHECK); | |
| 1174 | |
| 1175 if ((*write_stream) == NULL) { | |
| 1176 if (length_in_bytes > fixed_buffer_size) { | |
| 1177 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
| 1178 } else { | |
| 1179 (*write_stream) = new CompressedLineNumberWriteStream( | |
| 1180 linenumbertable_buffer, fixed_buffer_size); | |
| 1181 } | |
| 1182 } | |
| 1183 | |
| 1184 while (num_entries-- > 0) { | |
| 1185 u2 bci = cfs->get_u2_fast(); // start_pc | |
| 1186 u2 line = cfs->get_u2_fast(); // line_number | |
| 1187 guarantee_property(bci < code_length, | |
| 1188 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
| 1189 (*write_stream)->write_pair(bci, line); | |
| 1190 } | |
| 1191 } | |
| 1192 | |
| 1193 | |
| 1194 // Class file LocalVariableTable elements. | |
| 1195 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
| 1196 public: | |
| 1197 u2 start_bci; | |
| 1198 u2 length; | |
| 1199 u2 name_cp_index; | |
| 1200 u2 descriptor_cp_index; | |
| 1201 u2 slot; | |
| 1202 }; | |
| 1203 | |
| 1204 | |
| 1205 class LVT_Hash: public CHeapObj { | |
| 1206 public: | |
| 1207 LocalVariableTableElement *_elem; // element | |
| 1208 LVT_Hash* _next; // Next entry in hash table | |
| 1209 }; | |
| 1210 | |
| 1211 unsigned int hash(LocalVariableTableElement *elem) { | |
| 1212 unsigned int raw_hash = elem->start_bci; | |
| 1213 | |
| 1214 raw_hash = elem->length + raw_hash * 37; | |
| 1215 raw_hash = elem->name_cp_index + raw_hash * 37; | |
| 1216 raw_hash = elem->slot + raw_hash * 37; | |
| 1217 | |
| 1218 return raw_hash % HASH_ROW_SIZE; | |
| 1219 } | |
| 1220 | |
| 1221 void initialize_hashtable(LVT_Hash** table) { | |
| 1222 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 1223 table[i] = NULL; | |
| 1224 } | |
| 1225 } | |
| 1226 | |
| 1227 void clear_hashtable(LVT_Hash** table) { | |
| 1228 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 1229 LVT_Hash* current = table[i]; | |
| 1230 LVT_Hash* next; | |
| 1231 while (current != NULL) { | |
| 1232 next = current->_next; | |
| 1233 current->_next = NULL; | |
| 1234 delete(current); | |
| 1235 current = next; | |
| 1236 } | |
| 1237 table[i] = NULL; | |
| 1238 } | |
| 1239 } | |
| 1240 | |
| 1241 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
| 1242 LVT_Hash* entry = table[index]; | |
| 1243 | |
| 1244 /* | |
| 1245 * 3-tuple start_bci/length/slot has to be unique key, | |
| 1246 * so the following comparison seems to be redundant: | |
| 1247 * && elem->name_cp_index == entry->_elem->name_cp_index | |
| 1248 */ | |
| 1249 while (entry != NULL) { | |
| 1250 if (elem->start_bci == entry->_elem->start_bci | |
| 1251 && elem->length == entry->_elem->length | |
| 1252 && elem->name_cp_index == entry->_elem->name_cp_index | |
| 1253 && elem->slot == entry->_elem->slot | |
| 1254 ) { | |
| 1255 return entry; | |
| 1256 } | |
| 1257 entry = entry->_next; | |
| 1258 } | |
| 1259 return NULL; | |
| 1260 } | |
| 1261 | |
| 1262 // Return false if the local variable is found in table. | |
| 1263 // Return true if no duplicate is found. | |
| 1264 // And local variable is added as a new entry in table. | |
| 1265 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
| 1266 // First lookup for duplicates | |
| 1267 int index = hash(elem); | |
| 1268 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
| 1269 | |
| 1270 if (entry != NULL) { | |
| 1271 return false; | |
| 1272 } | |
| 1273 // No duplicate is found, allocate a new entry and fill it. | |
| 1274 if ((entry = new LVT_Hash()) == NULL) { | |
| 1275 return false; | |
| 1276 } | |
| 1277 entry->_elem = elem; | |
| 1278 | |
| 1279 // Insert into hash table | |
| 1280 entry->_next = table[index]; | |
| 1281 table[index] = entry; | |
| 1282 | |
| 1283 return true; | |
| 1284 } | |
| 1285 | |
| 1286 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
| 1287 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
| 1288 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
| 1289 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
| 1290 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
| 1291 lvt->signature_cp_index = 0; | |
| 1292 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
| 1293 } | |
| 1294 | |
| 1295 // Function is used to parse both attributes: | |
| 1296 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
| 1297 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
| 1298 u2 max_locals, | |
| 1299 u4 code_attribute_length, | |
| 1300 constantPoolHandle cp, | |
| 1301 u2* localvariable_table_length, | |
| 1302 bool isLVTT, | |
| 1303 TRAPS) { | |
| 1304 ClassFileStream* cfs = stream(); | |
| 1305 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
| 1306 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
| 1307 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
| 1308 // Verify local variable table attribute has right length | |
| 1309 if (_need_verify) { | |
| 1310 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
| 1311 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
| 1312 } | |
| 1313 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
| 1314 assert(localvariable_table_start != NULL, "null local variable table"); | |
| 1315 if (!_need_verify) { | |
| 1316 cfs->skip_u2_fast(size); | |
| 1317 } else { | |
| 1318 cfs->guarantee_more(size * 2, CHECK_NULL); | |
| 1319 for(int i = 0; i < (*localvariable_table_length); i++) { | |
| 1320 u2 start_pc = cfs->get_u2_fast(); | |
| 1321 u2 length = cfs->get_u2_fast(); | |
| 1322 u2 name_index = cfs->get_u2_fast(); | |
| 1323 u2 descriptor_index = cfs->get_u2_fast(); | |
| 1324 u2 index = cfs->get_u2_fast(); | |
| 1325 // Assign to a u4 to avoid overflow | |
| 1326 u4 end_pc = (u4)start_pc + (u4)length; | |
| 1327 | |
| 1328 if (start_pc >= code_length) { | |
| 1329 classfile_parse_error( | |
| 1330 "Invalid start_pc %u in %s in class file %s", | |
| 1331 start_pc, tbl_name, CHECK_NULL); | |
| 1332 } | |
| 1333 if (end_pc > code_length) { | |
| 1334 classfile_parse_error( | |
| 1335 "Invalid length %u in %s in class file %s", | |
| 1336 length, tbl_name, CHECK_NULL); | |
| 1337 } | |
| 1338 int cp_size = cp->length(); | |
| 1339 guarantee_property( | |
| 1340 valid_cp_range(name_index, cp_size) && | |
| 1341 cp->tag_at(name_index).is_utf8(), | |
| 1342 "Name index %u in %s has bad constant type in class file %s", | |
| 1343 name_index, tbl_name, CHECK_NULL); | |
| 1344 guarantee_property( | |
| 1345 valid_cp_range(descriptor_index, cp_size) && | |
| 1346 cp->tag_at(descriptor_index).is_utf8(), | |
| 1347 "Signature index %u in %s has bad constant type in class file %s", | |
| 1348 descriptor_index, tbl_name, CHECK_NULL); | |
| 1349 | |
| 1350 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 1351 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index)); | |
| 1352 verify_legal_field_name(name, CHECK_NULL); | |
| 1353 u2 extra_slot = 0; | |
| 1354 if (!isLVTT) { | |
| 1355 verify_legal_field_signature(name, sig, CHECK_NULL); | |
| 1356 | |
| 1357 // 4894874: check special cases for double and long local variables | |
| 1358 if (sig() == vmSymbols::type_signature(T_DOUBLE) || | |
| 1359 sig() == vmSymbols::type_signature(T_LONG)) { | |
| 1360 extra_slot = 1; | |
| 1361 } | |
| 1362 } | |
| 1363 guarantee_property((index + extra_slot) < max_locals, | |
| 1364 "Invalid index %u in %s in class file %s", | |
| 1365 index, tbl_name, CHECK_NULL); | |
| 1366 } | |
| 1367 } | |
| 1368 return localvariable_table_start; | |
| 1369 } | |
| 1370 | |
| 1371 | |
| 1372 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
| 1373 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
| 1374 ClassFileStream* cfs = stream(); | |
| 1375 u2 index = 0; // index in the array with long/double occupying two slots | |
| 1376 u4 i1 = *u1_index; | |
| 1377 u4 i2 = *u2_index + 1; | |
| 1378 for(int i = 0; i < array_length; i++) { | |
| 1379 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
| 1380 index++; | |
| 1381 if (tag == ITEM_Long || tag == ITEM_Double) { | |
| 1382 index++; | |
| 1383 } else if (tag == ITEM_Object) { | |
| 1384 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1385 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
|
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1386 is_klass_reference(cp, class_index), |
| 0 | 1387 "Bad class index %u in StackMap in class file %s", |
| 1388 class_index, CHECK); | |
| 1389 } else if (tag == ITEM_Uninitialized) { | |
| 1390 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1391 guarantee_property( | |
| 1392 offset < code_length, | |
| 1393 "Bad uninitialized type offset %u in StackMap in class file %s", | |
| 1394 offset, CHECK); | |
| 1395 } else { | |
| 1396 guarantee_property( | |
| 1397 tag <= (u1)ITEM_Uninitialized, | |
| 1398 "Unknown variable type %u in StackMap in class file %s", | |
| 1399 tag, CHECK); | |
| 1400 } | |
| 1401 } | |
| 1402 u2_array[*u2_index] = index; | |
| 1403 *u1_index = i1; | |
| 1404 *u2_index = i2; | |
| 1405 } | |
| 1406 | |
| 1407 typeArrayOop ClassFileParser::parse_stackmap_table( | |
| 1408 u4 code_attribute_length, TRAPS) { | |
| 1409 if (code_attribute_length == 0) | |
| 1410 return NULL; | |
| 1411 | |
| 1412 ClassFileStream* cfs = stream(); | |
| 1413 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
| 1414 assert(stackmap_table_start != NULL, "null stackmap table"); | |
| 1415 | |
| 1416 // check code_attribute_length first | |
| 1417 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
| 1418 | |
| 1419 if (!_need_verify && !DumpSharedSpaces) { | |
| 1420 return NULL; | |
| 1421 } | |
| 1422 | |
| 1423 typeArrayOop stackmap_data = | |
| 1424 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
| 1425 | |
| 1426 stackmap_data->set_length(code_attribute_length); | |
| 1427 memcpy((void*)stackmap_data->byte_at_addr(0), | |
| 1428 (void*)stackmap_table_start, code_attribute_length); | |
| 1429 return stackmap_data; | |
| 1430 } | |
| 1431 | |
| 1432 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
| 1433 u4 method_attribute_length, | |
| 1434 constantPoolHandle cp, TRAPS) { | |
| 1435 ClassFileStream* cfs = stream(); | |
| 1436 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
| 1437 *checked_exceptions_length = cfs->get_u2_fast(); | |
| 1438 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1439 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
| 1440 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
| 1441 if (!_need_verify) { | |
| 1442 cfs->skip_u2_fast(size); | |
| 1443 } else { | |
| 1444 // Verify each value in the checked exception table | |
| 1445 u2 checked_exception; | |
| 1446 u2 len = *checked_exceptions_length; | |
| 1447 cfs->guarantee_more(2 * len, CHECK_NULL); | |
| 1448 for (int i = 0; i < len; i++) { | |
| 1449 checked_exception = cfs->get_u2_fast(); | |
| 1450 check_property( | |
| 1451 valid_cp_range(checked_exception, cp->length()) && | |
|
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1452 is_klass_reference(cp, checked_exception), |
| 0 | 1453 "Exception name has bad type at constant pool %u in class file %s", |
| 1454 checked_exception, CHECK_NULL); | |
| 1455 } | |
| 1456 } | |
| 1457 // check exceptions attribute length | |
| 1458 if (_need_verify) { | |
| 1459 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
| 1460 sizeof(u2) * size), | |
| 1461 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
| 1462 } | |
| 1463 return checked_exceptions_start; | |
| 1464 } | |
| 1465 | |
|
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1466 void ClassFileParser::throwIllegalSignature( |
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1467 const char* type, symbolHandle name, symbolHandle sig, TRAPS) { |
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1468 ResourceMark rm(THREAD); |
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1469 Exceptions::fthrow(THREAD_AND_LOCATION, |
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1470 vmSymbols::java_lang_ClassFormatError(), |
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1471 "%s \"%s\" in class %s has illegal signature \"%s\"", type, |
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1472 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); |
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1473 } |
| 0 | 1474 |
| 1475 #define MAX_ARGS_SIZE 255 | |
| 1476 #define MAX_CODE_SIZE 65535 | |
| 1477 #define INITIAL_MAX_LVT_NUMBER 256 | |
| 1478 | |
| 1479 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
| 1480 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
| 1481 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
| 1482 // entire method attribute is parsed. | |
| 1483 // | |
| 1484 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1485 // from the method back up to the containing klass. These flag values | |
| 1486 // are added to klass's access_flags. | |
| 1487 | |
| 1488 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
| 1489 AccessFlags *promoted_flags, | |
| 1490 typeArrayHandle* method_annotations, | |
| 1491 typeArrayHandle* method_parameter_annotations, | |
| 1492 typeArrayHandle* method_default_annotations, | |
| 1493 TRAPS) { | |
| 1494 ClassFileStream* cfs = stream(); | |
| 1495 methodHandle nullHandle; | |
| 1496 ResourceMark rm(THREAD); | |
| 1497 // Parse fixed parts | |
| 1498 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 1499 | |
| 1500 int flags = cfs->get_u2_fast(); | |
| 1501 u2 name_index = cfs->get_u2_fast(); | |
| 1502 int cp_size = cp->length(); | |
| 1503 check_property( | |
| 1504 valid_cp_range(name_index, cp_size) && | |
| 1505 cp->tag_at(name_index).is_utf8(), | |
| 1506 "Illegal constant pool index %u for method name in class file %s", | |
| 1507 name_index, CHECK_(nullHandle)); | |
| 1508 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 1509 verify_legal_method_name(name, CHECK_(nullHandle)); | |
| 1510 | |
| 1511 u2 signature_index = cfs->get_u2_fast(); | |
| 1512 guarantee_property( | |
| 1513 valid_cp_range(signature_index, cp_size) && | |
| 1514 cp->tag_at(signature_index).is_utf8(), | |
| 1515 "Illegal constant pool index %u for method signature in class file %s", | |
| 1516 signature_index, CHECK_(nullHandle)); | |
| 1517 symbolHandle signature(THREAD, cp->symbol_at(signature_index)); | |
| 1518 | |
| 1519 AccessFlags access_flags; | |
| 1520 if (name == vmSymbols::class_initializer_name()) { | |
| 1521 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
| 1522 flags = JVM_ACC_STATIC; | |
| 1523 } else { | |
| 1524 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
| 1525 } | |
| 1526 | |
| 1527 int args_size = -1; // only used when _need_verify is true | |
| 1528 if (_need_verify) { | |
| 1529 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
| 1530 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 1531 if (args_size > MAX_ARGS_SIZE) { | |
| 1532 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
| 1533 } | |
| 1534 } | |
| 1535 | |
| 1536 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 1537 | |
| 1538 // Default values for code and exceptions attribute elements | |
| 1539 u2 max_stack = 0; | |
| 1540 u2 max_locals = 0; | |
| 1541 u4 code_length = 0; | |
| 1542 u1* code_start = 0; | |
| 1543 u2 exception_table_length = 0; | |
| 1544 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
| 1545 u2 checked_exceptions_length = 0; | |
| 1546 u2* checked_exceptions_start = NULL; | |
| 1547 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
| 1548 int linenumber_table_length = 0; | |
| 1549 int total_lvt_length = 0; | |
| 1550 u2 lvt_cnt = 0; | |
| 1551 u2 lvtt_cnt = 0; | |
| 1552 bool lvt_allocated = false; | |
| 1553 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1554 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1555 u2* localvariable_table_length; | |
| 1556 u2** localvariable_table_start; | |
| 1557 u2* localvariable_type_table_length; | |
| 1558 u2** localvariable_type_table_start; | |
| 1559 bool parsed_code_attribute = false; | |
| 1560 bool parsed_checked_exceptions_attribute = false; | |
| 1561 bool parsed_stackmap_attribute = false; | |
| 1562 // stackmap attribute - JDK1.5 | |
| 1563 typeArrayHandle stackmap_data; | |
| 1564 u2 generic_signature_index = 0; | |
| 1565 u1* runtime_visible_annotations = NULL; | |
| 1566 int runtime_visible_annotations_length = 0; | |
| 1567 u1* runtime_invisible_annotations = NULL; | |
| 1568 int runtime_invisible_annotations_length = 0; | |
| 1569 u1* runtime_visible_parameter_annotations = NULL; | |
| 1570 int runtime_visible_parameter_annotations_length = 0; | |
| 1571 u1* runtime_invisible_parameter_annotations = NULL; | |
| 1572 int runtime_invisible_parameter_annotations_length = 0; | |
| 1573 u1* annotation_default = NULL; | |
| 1574 int annotation_default_length = 0; | |
| 1575 | |
| 1576 // Parse code and exceptions attribute | |
| 1577 u2 method_attributes_count = cfs->get_u2_fast(); | |
| 1578 while (method_attributes_count--) { | |
| 1579 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
| 1580 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
| 1581 u4 method_attribute_length = cfs->get_u4_fast(); | |
| 1582 check_property( | |
| 1583 valid_cp_range(method_attribute_name_index, cp_size) && | |
| 1584 cp->tag_at(method_attribute_name_index).is_utf8(), | |
| 1585 "Invalid method attribute name index %u in class file %s", | |
| 1586 method_attribute_name_index, CHECK_(nullHandle)); | |
| 1587 | |
| 1588 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index); | |
| 1589 if (method_attribute_name == vmSymbols::tag_code()) { | |
| 1590 // Parse Code attribute | |
| 1591 if (_need_verify) { | |
| 1592 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
| 1593 "Code attribute in native or abstract methods in class file %s", | |
| 1594 CHECK_(nullHandle)); | |
| 1595 } | |
| 1596 if (parsed_code_attribute) { | |
| 1597 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
| 1598 } | |
| 1599 parsed_code_attribute = true; | |
| 1600 | |
| 1601 // Stack size, locals size, and code size | |
| 1602 if (_major_version == 45 && _minor_version <= 2) { | |
| 1603 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
| 1604 max_stack = cfs->get_u1_fast(); | |
| 1605 max_locals = cfs->get_u1_fast(); | |
| 1606 code_length = cfs->get_u2_fast(); | |
| 1607 } else { | |
| 1608 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
| 1609 max_stack = cfs->get_u2_fast(); | |
| 1610 max_locals = cfs->get_u2_fast(); | |
| 1611 code_length = cfs->get_u4_fast(); | |
| 1612 } | |
| 1613 if (_need_verify) { | |
| 1614 guarantee_property(args_size <= max_locals, | |
| 1615 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
| 1616 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
| 1617 "Invalid method Code length %u in class file %s", | |
| 1618 code_length, CHECK_(nullHandle)); | |
| 1619 } | |
| 1620 // Code pointer | |
| 1621 code_start = cfs->get_u1_buffer(); | |
| 1622 assert(code_start != NULL, "null code start"); | |
| 1623 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
| 1624 cfs->skip_u1_fast(code_length); | |
| 1625 | |
| 1626 // Exception handler table | |
| 1627 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
| 1628 exception_table_length = cfs->get_u2_fast(); | |
| 1629 if (exception_table_length > 0) { | |
| 1630 exception_handlers = | |
| 1631 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
| 1632 } | |
| 1633 | |
| 1634 // Parse additional attributes in code attribute | |
| 1635 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
| 1636 u2 code_attributes_count = cfs->get_u2_fast(); | |
|
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1637 |
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1638 unsigned int calculated_attribute_length = 0; |
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1639 |
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1640 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1641 calculated_attribute_length = |
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1642 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1643 } else { |
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1644 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1645 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1646 } |
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1647 calculated_attribute_length += |
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1648 code_length + |
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1649 sizeof(exception_table_length) + |
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1650 sizeof(code_attributes_count) + |
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1651 exception_table_length * |
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1652 ( sizeof(u2) + // start_pc |
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1653 sizeof(u2) + // end_pc |
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1654 sizeof(u2) + // handler_pc |
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1655 sizeof(u2) ); // catch_type_index |
| 0 | 1656 |
| 1657 while (code_attributes_count--) { | |
| 1658 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
| 1659 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
| 1660 u4 code_attribute_length = cfs->get_u4_fast(); | |
| 1661 calculated_attribute_length += code_attribute_length + | |
| 1662 sizeof(code_attribute_name_index) + | |
| 1663 sizeof(code_attribute_length); | |
| 1664 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
| 1665 cp->tag_at(code_attribute_name_index).is_utf8(), | |
| 1666 "Invalid code attribute name index %u in class file %s", | |
| 1667 code_attribute_name_index, | |
| 1668 CHECK_(nullHandle)); | |
| 1669 if (LoadLineNumberTables && | |
| 1670 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
| 1671 // Parse and compress line number table | |
| 1672 parse_linenumber_table(code_attribute_length, code_length, | |
| 1673 &linenumber_table, CHECK_(nullHandle)); | |
| 1674 | |
| 1675 } else if (LoadLocalVariableTables && | |
| 1676 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
| 1677 // Parse local variable table | |
| 1678 if (!lvt_allocated) { | |
| 1679 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1680 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1681 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1682 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1683 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1684 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1685 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1686 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1687 lvt_allocated = true; | |
| 1688 } | |
| 1689 if (lvt_cnt == max_lvt_cnt) { | |
| 1690 max_lvt_cnt <<= 1; | |
| 1691 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
| 1692 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
| 1693 } | |
| 1694 localvariable_table_start[lvt_cnt] = | |
| 1695 parse_localvariable_table(code_length, | |
| 1696 max_locals, | |
| 1697 code_attribute_length, | |
| 1698 cp, | |
| 1699 &localvariable_table_length[lvt_cnt], | |
| 1700 false, // is not LVTT | |
| 1701 CHECK_(nullHandle)); | |
| 1702 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
| 1703 lvt_cnt++; | |
| 1704 } else if (LoadLocalVariableTypeTables && | |
| 1705 _major_version >= JAVA_1_5_VERSION && | |
| 1706 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
| 1707 if (!lvt_allocated) { | |
| 1708 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1709 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1710 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1711 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1712 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1713 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1714 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1715 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1716 lvt_allocated = true; | |
| 1717 } | |
| 1718 // Parse local variable type table | |
| 1719 if (lvtt_cnt == max_lvtt_cnt) { | |
| 1720 max_lvtt_cnt <<= 1; | |
| 1721 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
| 1722 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
| 1723 } | |
| 1724 localvariable_type_table_start[lvtt_cnt] = | |
| 1725 parse_localvariable_table(code_length, | |
| 1726 max_locals, | |
| 1727 code_attribute_length, | |
| 1728 cp, | |
| 1729 &localvariable_type_table_length[lvtt_cnt], | |
| 1730 true, // is LVTT | |
| 1731 CHECK_(nullHandle)); | |
| 1732 lvtt_cnt++; | |
| 1733 } else if (UseSplitVerifier && | |
| 1734 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
| 1735 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
| 1736 // Stack map is only needed by the new verifier in JDK1.5. | |
| 1737 if (parsed_stackmap_attribute) { | |
| 1738 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
| 1739 } | |
| 1740 typeArrayOop sm = | |
| 1741 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
| 1742 stackmap_data = typeArrayHandle(THREAD, sm); | |
| 1743 parsed_stackmap_attribute = true; | |
| 1744 } else { | |
| 1745 // Skip unknown attributes | |
| 1746 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
| 1747 } | |
| 1748 } | |
| 1749 // check method attribute length | |
| 1750 if (_need_verify) { | |
| 1751 guarantee_property(method_attribute_length == calculated_attribute_length, | |
| 1752 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
| 1753 } | |
| 1754 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
| 1755 // Parse Exceptions attribute | |
| 1756 if (parsed_checked_exceptions_attribute) { | |
| 1757 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
| 1758 } | |
| 1759 parsed_checked_exceptions_attribute = true; | |
| 1760 checked_exceptions_start = | |
| 1761 parse_checked_exceptions(&checked_exceptions_length, | |
| 1762 method_attribute_length, | |
| 1763 cp, CHECK_(nullHandle)); | |
| 1764 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
| 1765 if (method_attribute_length != 0) { | |
| 1766 classfile_parse_error( | |
| 1767 "Invalid Synthetic method attribute length %u in class file %s", | |
| 1768 method_attribute_length, CHECK_(nullHandle)); | |
| 1769 } | |
| 1770 // Should we check that there hasn't already been a synthetic attribute? | |
| 1771 access_flags.set_is_synthetic(); | |
| 1772 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 1773 if (method_attribute_length != 0) { | |
| 1774 classfile_parse_error( | |
| 1775 "Invalid Deprecated method attribute length %u in class file %s", | |
| 1776 method_attribute_length, CHECK_(nullHandle)); | |
| 1777 } | |
| 1778 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 1779 if (method_attribute_name == vmSymbols::tag_signature()) { | |
| 1780 if (method_attribute_length != 2) { | |
| 1781 classfile_parse_error( | |
| 1782 "Invalid Signature attribute length %u in class file %s", | |
| 1783 method_attribute_length, CHECK_(nullHandle)); | |
| 1784 } | |
| 1785 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
| 1786 generic_signature_index = cfs->get_u2_fast(); | |
| 1787 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 1788 runtime_visible_annotations_length = method_attribute_length; | |
| 1789 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 1790 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 1791 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
| 1792 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 1793 runtime_invisible_annotations_length = method_attribute_length; | |
| 1794 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 1795 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 1796 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
| 1797 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
| 1798 runtime_visible_parameter_annotations_length = method_attribute_length; | |
| 1799 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1800 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
| 1801 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1802 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
| 1803 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
| 1804 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1805 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
| 1806 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1807 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
| 1808 annotation_default_length = method_attribute_length; | |
| 1809 annotation_default = cfs->get_u1_buffer(); | |
| 1810 assert(annotation_default != NULL, "null annotation default"); | |
| 1811 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
| 1812 } else { | |
| 1813 // Skip unknown attributes | |
| 1814 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1815 } | |
| 1816 } else { | |
| 1817 // Skip unknown attributes | |
| 1818 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1819 } | |
| 1820 } | |
| 1821 | |
| 1822 if (linenumber_table != NULL) { | |
| 1823 linenumber_table->write_terminator(); | |
| 1824 linenumber_table_length = linenumber_table->position(); | |
| 1825 } | |
| 1826 | |
| 1827 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
| 1828 if (_need_verify) { | |
| 1829 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
| 1830 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
| 1831 } | |
| 1832 | |
| 1833 // All sizing information for a methodOop is finally available, now create it | |
| 1834 methodOop m_oop = oopFactory::new_method( | |
| 1835 code_length, access_flags, linenumber_table_length, | |
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1836 total_lvt_length, checked_exceptions_length, |
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1837 methodOopDesc::IsSafeConc, CHECK_(nullHandle)); |
| 0 | 1838 methodHandle m (THREAD, m_oop); |
| 1839 | |
| 1840 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
| 1841 | |
| 1842 // Fill in information from fixed part (access_flags already set) | |
| 1843 m->set_constants(cp()); | |
| 1844 m->set_name_index(name_index); | |
| 1845 m->set_signature_index(signature_index); | |
| 1846 m->set_generic_signature_index(generic_signature_index); | |
| 1847 #ifdef CC_INTERP | |
| 1848 // hmm is there a gc issue here?? | |
| 1849 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
| 1850 m->set_result_index(rtf.type()); | |
| 1851 #endif | |
| 1852 | |
| 1853 if (args_size >= 0) { | |
| 1854 m->set_size_of_parameters(args_size); | |
| 1855 } else { | |
| 1856 m->compute_size_of_parameters(THREAD); | |
| 1857 } | |
| 1858 #ifdef ASSERT | |
| 1859 if (args_size >= 0) { | |
| 1860 m->compute_size_of_parameters(THREAD); | |
| 1861 assert(args_size == m->size_of_parameters(), ""); | |
| 1862 } | |
| 1863 #endif | |
| 1864 | |
| 1865 // Fill in code attribute information | |
| 1866 m->set_max_stack(max_stack); | |
| 1867 m->set_max_locals(max_locals); | |
| 1868 m->constMethod()->set_stackmap_data(stackmap_data()); | |
| 1869 | |
| 1870 /** | |
| 1871 * The exception_table field is the flag used to indicate | |
| 1872 * that the methodOop and it's associated constMethodOop are partially | |
| 1873 * initialized and thus are exempt from pre/post GC verification. Once | |
| 1874 * the field is set, the oops are considered fully initialized so make | |
| 1875 * sure that the oops can pass verification when this field is set. | |
| 1876 */ | |
| 1877 m->set_exception_table(exception_handlers()); | |
| 1878 | |
| 1879 // Copy byte codes | |
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1880 m->set_code(code_start); |
| 0 | 1881 |
| 1882 // Copy line number table | |
| 1883 if (linenumber_table != NULL) { | |
| 1884 memcpy(m->compressed_linenumber_table(), | |
| 1885 linenumber_table->buffer(), linenumber_table_length); | |
| 1886 } | |
| 1887 | |
| 1888 // Copy checked exceptions | |
| 1889 if (checked_exceptions_length > 0) { | |
| 1890 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1891 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
| 1892 } | |
| 1893 | |
| 1894 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
| 1895 * | |
| 1896 * Rules for LVT's and LVTT's are: | |
| 1897 * - There can be any number of LVT's and LVTT's. | |
| 1898 * - If there are n LVT's, it is the same as if there was just | |
| 1899 * one LVT containing all the entries from the n LVT's. | |
| 1900 * - There may be no more than one LVT entry per local variable. | |
| 1901 * Two LVT entries are 'equal' if these fields are the same: | |
| 1902 * start_pc, length, name, slot | |
| 1903 * - There may be no more than one LVTT entry per each LVT entry. | |
| 1904 * Each LVTT entry has to match some LVT entry. | |
| 1905 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
| 1906 */ | |
| 1907 if (total_lvt_length > 0) { | |
| 1908 int tbl_no, idx; | |
| 1909 | |
| 1910 promoted_flags->set_has_localvariable_table(); | |
| 1911 | |
| 1912 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
| 1913 initialize_hashtable(lvt_Hash); | |
| 1914 | |
| 1915 // To fill LocalVariableTable in | |
| 1916 Classfile_LVT_Element* cf_lvt; | |
| 1917 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
| 1918 | |
| 1919 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
| 1920 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
| 1921 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
| 1922 copy_lvt_element(&cf_lvt[idx], lvt); | |
| 1923 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
| 1924 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
| 1925 && _need_verify | |
| 1926 && _major_version >= JAVA_1_5_VERSION ) { | |
| 1927 clear_hashtable(lvt_Hash); | |
| 1928 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
| 1929 "entry for '%s' in class file %s", | |
| 1930 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
| 1931 CHECK_(nullHandle)); | |
| 1932 } | |
| 1933 } | |
| 1934 } | |
| 1935 | |
| 1936 // To merge LocalVariableTable and LocalVariableTypeTable | |
| 1937 Classfile_LVT_Element* cf_lvtt; | |
| 1938 LocalVariableTableElement lvtt_elem; | |
| 1939 | |
| 1940 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
| 1941 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
| 1942 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
| 1943 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
| 1944 int index = hash(&lvtt_elem); | |
| 1945 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
| 1946 if (entry == NULL) { | |
| 1947 if (_need_verify) { | |
| 1948 clear_hashtable(lvt_Hash); | |
| 1949 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
| 1950 "does not match any LVT entry", | |
| 1951 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 1952 CHECK_(nullHandle)); | |
| 1953 } | |
| 1954 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
| 1955 clear_hashtable(lvt_Hash); | |
| 1956 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
| 1957 "entry for '%s' in class file %s", | |
| 1958 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 1959 CHECK_(nullHandle)); | |
| 1960 } else { | |
| 1961 // to add generic signatures into LocalVariableTable | |
| 1962 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
| 1963 } | |
| 1964 } | |
| 1965 } | |
| 1966 clear_hashtable(lvt_Hash); | |
| 1967 } | |
| 1968 | |
| 1969 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
| 1970 runtime_visible_annotations_length, | |
| 1971 runtime_invisible_annotations, | |
| 1972 runtime_invisible_annotations_length, | |
| 1973 CHECK_(nullHandle)); | |
| 1974 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
| 1975 runtime_visible_parameter_annotations_length, | |
| 1976 runtime_invisible_parameter_annotations, | |
| 1977 runtime_invisible_parameter_annotations_length, | |
| 1978 CHECK_(nullHandle)); | |
| 1979 *method_default_annotations = assemble_annotations(annotation_default, | |
| 1980 annotation_default_length, | |
| 1981 NULL, | |
| 1982 0, | |
| 1983 CHECK_(nullHandle)); | |
| 1984 | |
| 1985 if (name() == vmSymbols::finalize_method_name() && | |
| 1986 signature() == vmSymbols::void_method_signature()) { | |
| 1987 if (m->is_empty_method()) { | |
| 1988 _has_empty_finalizer = true; | |
| 1989 } else { | |
| 1990 _has_finalizer = true; | |
| 1991 } | |
| 1992 } | |
| 1993 if (name() == vmSymbols::object_initializer_name() && | |
| 1994 signature() == vmSymbols::void_method_signature() && | |
| 1995 m->is_vanilla_constructor()) { | |
| 1996 _has_vanilla_constructor = true; | |
| 1997 } | |
| 1998 | |
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1999 if (EnableMethodHandles && (m->is_method_handle_invoke() || |
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2000 m->is_method_handle_adapter())) { |
| 710 | 2001 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(), |
| 2002 "Method handle invokers must be defined internally to the VM", nullHandle); | |
| 2003 } | |
| 2004 | |
| 0 | 2005 return m; |
| 2006 } | |
| 2007 | |
| 2008 | |
| 2009 // The promoted_flags parameter is used to pass relevant access_flags | |
| 2010 // from the methods back up to the containing klass. These flag values | |
| 2011 // are added to klass's access_flags. | |
| 2012 | |
| 2013 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
| 2014 AccessFlags* promoted_flags, | |
| 2015 bool* has_final_method, | |
| 2016 objArrayOop* methods_annotations_oop, | |
| 2017 objArrayOop* methods_parameter_annotations_oop, | |
| 2018 objArrayOop* methods_default_annotations_oop, | |
| 2019 TRAPS) { | |
| 2020 ClassFileStream* cfs = stream(); | |
| 2021 objArrayHandle nullHandle; | |
| 2022 typeArrayHandle method_annotations; | |
| 2023 typeArrayHandle method_parameter_annotations; | |
| 2024 typeArrayHandle method_default_annotations; | |
| 2025 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 2026 u2 length = cfs->get_u2_fast(); | |
| 2027 if (length == 0) { | |
| 2028 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 2029 } else { | |
| 2030 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2031 objArrayHandle methods(THREAD, m); | |
| 2032 HandleMark hm(THREAD); | |
| 2033 objArrayHandle methods_annotations; | |
| 2034 objArrayHandle methods_parameter_annotations; | |
| 2035 objArrayHandle methods_default_annotations; | |
| 2036 for (int index = 0; index < length; index++) { | |
| 2037 methodHandle method = parse_method(cp, is_interface, | |
| 2038 promoted_flags, | |
| 2039 &method_annotations, | |
| 2040 &method_parameter_annotations, | |
| 2041 &method_default_annotations, | |
| 2042 CHECK_(nullHandle)); | |
| 2043 if (method->is_final()) { | |
| 2044 *has_final_method = true; | |
| 2045 } | |
| 2046 methods->obj_at_put(index, method()); | |
| 2047 if (method_annotations.not_null()) { | |
| 2048 if (methods_annotations.is_null()) { | |
| 2049 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2050 methods_annotations = objArrayHandle(THREAD, md); | |
| 2051 } | |
| 2052 methods_annotations->obj_at_put(index, method_annotations()); | |
| 2053 } | |
| 2054 if (method_parameter_annotations.not_null()) { | |
| 2055 if (methods_parameter_annotations.is_null()) { | |
| 2056 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2057 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
| 2058 } | |
| 2059 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
| 2060 } | |
| 2061 if (method_default_annotations.not_null()) { | |
| 2062 if (methods_default_annotations.is_null()) { | |
| 2063 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2064 methods_default_annotations = objArrayHandle(THREAD, md); | |
| 2065 } | |
| 2066 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
| 2067 } | |
| 2068 } | |
| 2069 if (_need_verify && length > 1) { | |
| 2070 // Check duplicated methods | |
| 2071 ResourceMark rm(THREAD); | |
| 2072 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 2073 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 2074 initialize_hashtable(names_and_sigs); | |
| 2075 bool dup = false; | |
| 2076 { | |
| 2077 debug_only(No_Safepoint_Verifier nsv;) | |
| 2078 for (int i = 0; i < length; i++) { | |
| 2079 methodOop m = (methodOop)methods->obj_at(i); | |
| 2080 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 2081 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
| 2082 dup = true; | |
| 2083 break; | |
| 2084 } | |
| 2085 } | |
| 2086 } | |
| 2087 if (dup) { | |
| 2088 classfile_parse_error("Duplicate method name&signature in class file %s", | |
| 2089 CHECK_(nullHandle)); | |
| 2090 } | |
| 2091 } | |
| 2092 | |
| 2093 *methods_annotations_oop = methods_annotations(); | |
| 2094 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
| 2095 *methods_default_annotations_oop = methods_default_annotations(); | |
| 2096 | |
| 2097 return methods; | |
| 2098 } | |
| 2099 } | |
| 2100 | |
| 2101 | |
| 2102 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
| 2103 objArrayHandle methods_annotations, | |
| 2104 objArrayHandle methods_parameter_annotations, | |
| 2105 objArrayHandle methods_default_annotations, | |
| 2106 TRAPS) { | |
| 2107 typeArrayHandle nullHandle; | |
| 2108 int length = methods()->length(); | |
| 2109 // If JVMTI original method ordering is enabled we have to | |
| 2110 // remember the original class file ordering. | |
| 2111 // We temporarily use the vtable_index field in the methodOop to store the | |
| 2112 // class file index, so we can read in after calling qsort. | |
| 2113 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 2114 for (int index = 0; index < length; index++) { | |
| 2115 methodOop m = methodOop(methods->obj_at(index)); | |
| 2116 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
| 2117 m->set_vtable_index(index); | |
| 2118 } | |
| 2119 } | |
| 2120 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
| 2121 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare | |
| 2122 methodOopDesc::sort_methods(methods(), | |
| 2123 methods_annotations(), | |
| 2124 methods_parameter_annotations(), | |
| 2125 methods_default_annotations()); | |
| 2126 | |
| 2127 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
| 2128 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 2129 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
| 2130 typeArrayHandle method_ordering(THREAD, new_ordering); | |
| 2131 for (int index = 0; index < length; index++) { | |
| 2132 methodOop m = methodOop(methods->obj_at(index)); | |
| 2133 int old_index = m->vtable_index(); | |
| 2134 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
| 2135 method_ordering->int_at_put(index, old_index); | |
| 2136 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
| 2137 } | |
| 2138 return method_ordering; | |
| 2139 } else { | |
| 2140 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
| 2141 } | |
| 2142 } | |
| 2143 | |
| 2144 | |
| 2145 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2146 ClassFileStream* cfs = stream(); | |
| 2147 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
| 2148 u2 sourcefile_index = cfs->get_u2_fast(); | |
| 2149 check_property( | |
| 2150 valid_cp_range(sourcefile_index, cp->length()) && | |
| 2151 cp->tag_at(sourcefile_index).is_utf8(), | |
| 2152 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
| 2153 sourcefile_index, CHECK); | |
| 2154 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
| 2155 } | |
| 2156 | |
| 2157 | |
| 2158 | |
| 2159 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
| 2160 instanceKlassHandle k, | |
| 2161 int length, TRAPS) { | |
| 2162 ClassFileStream* cfs = stream(); | |
| 2163 u1* sde_buffer = cfs->get_u1_buffer(); | |
| 2164 assert(sde_buffer != NULL, "null sde buffer"); | |
| 2165 | |
| 2166 // Don't bother storing it if there is no way to retrieve it | |
| 2167 if (JvmtiExport::can_get_source_debug_extension()) { | |
| 2168 // Optimistically assume that only 1 byte UTF format is used | |
| 2169 // (common case) | |
| 2170 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer, | |
| 2171 length, CHECK); | |
| 2172 k->set_source_debug_extension(sde_symbol); | |
| 2173 } | |
| 2174 // Got utf8 string, set stream position forward | |
| 2175 cfs->skip_u1(length, CHECK); | |
| 2176 } | |
| 2177 | |
| 2178 | |
| 2179 // Inner classes can be static, private or protected (classic VM does this) | |
| 2180 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
| 2181 | |
| 2182 // Return number of classes in the inner classes attribute table | |
| 2183 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2184 ClassFileStream* cfs = stream(); | |
| 2185 cfs->guarantee_more(2, CHECK_0); // length | |
| 2186 u2 length = cfs->get_u2_fast(); | |
| 2187 | |
| 2188 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
| 2189 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
| 2190 typeArrayHandle inner_classes(THREAD, ic); | |
| 2191 int index = 0; | |
| 2192 int cp_size = cp->length(); | |
| 2193 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
| 2194 for (int n = 0; n < length; n++) { | |
| 2195 // Inner class index | |
| 2196 u2 inner_class_info_index = cfs->get_u2_fast(); | |
| 2197 check_property( | |
| 2198 inner_class_info_index == 0 || | |
| 2199 (valid_cp_range(inner_class_info_index, cp_size) && | |
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2200 is_klass_reference(cp, inner_class_info_index)), |
| 0 | 2201 "inner_class_info_index %u has bad constant type in class file %s", |
| 2202 inner_class_info_index, CHECK_0); | |
| 2203 // Outer class index | |
| 2204 u2 outer_class_info_index = cfs->get_u2_fast(); | |
| 2205 check_property( | |
| 2206 outer_class_info_index == 0 || | |
| 2207 (valid_cp_range(outer_class_info_index, cp_size) && | |
|
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2208 is_klass_reference(cp, outer_class_info_index)), |
| 0 | 2209 "outer_class_info_index %u has bad constant type in class file %s", |
| 2210 outer_class_info_index, CHECK_0); | |
| 2211 // Inner class name | |
| 2212 u2 inner_name_index = cfs->get_u2_fast(); | |
| 2213 check_property( | |
| 2214 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
| 2215 cp->tag_at(inner_name_index).is_utf8()), | |
| 2216 "inner_name_index %u has bad constant type in class file %s", | |
| 2217 inner_name_index, CHECK_0); | |
| 2218 if (_need_verify) { | |
| 2219 guarantee_property(inner_class_info_index != outer_class_info_index, | |
| 2220 "Class is both outer and inner class in class file %s", CHECK_0); | |
| 2221 } | |
| 2222 // Access flags | |
| 2223 AccessFlags inner_access_flags; | |
| 2224 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
| 2225 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2226 // Set abstract bit for old class files for backward compatibility | |
| 2227 flags |= JVM_ACC_ABSTRACT; | |
| 2228 } | |
| 2229 verify_legal_class_modifiers(flags, CHECK_0); | |
| 2230 inner_access_flags.set_flags(flags); | |
| 2231 | |
| 2232 inner_classes->short_at_put(index++, inner_class_info_index); | |
| 2233 inner_classes->short_at_put(index++, outer_class_info_index); | |
| 2234 inner_classes->short_at_put(index++, inner_name_index); | |
| 2235 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
| 2236 } | |
| 2237 | |
| 2238 // 4347400: make sure there's no duplicate entry in the classes array | |
| 2239 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2240 for(int i = 0; i < inner_classes->length(); i += 4) { | |
| 2241 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
| 2242 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
| 2243 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
| 2244 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
| 2245 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
| 2246 "Duplicate entry in InnerClasses in class file %s", | |
| 2247 CHECK_0); | |
| 2248 } | |
| 2249 } | |
| 2250 } | |
| 2251 | |
| 2252 // Update instanceKlass with inner class info. | |
| 2253 k->set_inner_classes(inner_classes()); | |
| 2254 return length; | |
| 2255 } | |
| 2256 | |
| 2257 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2258 k->set_is_synthetic(); | |
| 2259 } | |
| 2260 | |
| 2261 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2262 ClassFileStream* cfs = stream(); | |
| 2263 u2 signature_index = cfs->get_u2(CHECK); | |
| 2264 check_property( | |
| 2265 valid_cp_range(signature_index, cp->length()) && | |
| 2266 cp->tag_at(signature_index).is_utf8(), | |
| 2267 "Invalid constant pool index %u in Signature attribute in class file %s", | |
| 2268 signature_index, CHECK); | |
| 2269 k->set_generic_signature(cp->symbol_at(signature_index)); | |
| 2270 } | |
| 2271 | |
| 2272 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2273 ClassFileStream* cfs = stream(); | |
| 2274 // Set inner classes attribute to default sentinel | |
| 2275 k->set_inner_classes(Universe::the_empty_short_array()); | |
| 2276 cfs->guarantee_more(2, CHECK); // attributes_count | |
| 2277 u2 attributes_count = cfs->get_u2_fast(); | |
| 2278 bool parsed_sourcefile_attribute = false; | |
| 2279 bool parsed_innerclasses_attribute = false; | |
| 2280 bool parsed_enclosingmethod_attribute = false; | |
| 2281 u1* runtime_visible_annotations = NULL; | |
| 2282 int runtime_visible_annotations_length = 0; | |
| 2283 u1* runtime_invisible_annotations = NULL; | |
| 2284 int runtime_invisible_annotations_length = 0; | |
| 2285 // Iterate over attributes | |
| 2286 while (attributes_count--) { | |
| 2287 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 2288 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 2289 u4 attribute_length = cfs->get_u4_fast(); | |
| 2290 check_property( | |
| 2291 valid_cp_range(attribute_name_index, cp->length()) && | |
| 2292 cp->tag_at(attribute_name_index).is_utf8(), | |
| 2293 "Attribute name has bad constant pool index %u in class file %s", | |
| 2294 attribute_name_index, CHECK); | |
| 2295 symbolOop tag = cp->symbol_at(attribute_name_index); | |
| 2296 if (tag == vmSymbols::tag_source_file()) { | |
| 2297 // Check for SourceFile tag | |
| 2298 if (_need_verify) { | |
| 2299 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
| 2300 } | |
| 2301 if (parsed_sourcefile_attribute) { | |
| 2302 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
| 2303 } else { | |
| 2304 parsed_sourcefile_attribute = true; | |
| 2305 } | |
| 2306 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
| 2307 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
| 2308 // Check for SourceDebugExtension tag | |
| 2309 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
| 2310 } else if (tag == vmSymbols::tag_inner_classes()) { | |
| 2311 // Check for InnerClasses tag | |
| 2312 if (parsed_innerclasses_attribute) { | |
| 2313 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
| 2314 } else { | |
| 2315 parsed_innerclasses_attribute = true; | |
| 2316 } | |
| 2317 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
| 2318 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2319 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
| 2320 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
| 2321 } | |
| 2322 } else if (tag == vmSymbols::tag_synthetic()) { | |
| 2323 // Check for Synthetic tag | |
| 2324 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
| 2325 if (attribute_length != 0) { | |
| 2326 classfile_parse_error( | |
| 2327 "Invalid Synthetic classfile attribute length %u in class file %s", | |
| 2328 attribute_length, CHECK); | |
| 2329 } | |
| 2330 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
| 2331 } else if (tag == vmSymbols::tag_deprecated()) { | |
| 2332 // Check for Deprecatd tag - 4276120 | |
| 2333 if (attribute_length != 0) { | |
| 2334 classfile_parse_error( | |
| 2335 "Invalid Deprecated classfile attribute length %u in class file %s", | |
| 2336 attribute_length, CHECK); | |
| 2337 } | |
| 2338 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 2339 if (tag == vmSymbols::tag_signature()) { | |
| 2340 if (attribute_length != 2) { | |
| 2341 classfile_parse_error( | |
| 2342 "Wrong Signature attribute length %u in class file %s", | |
| 2343 attribute_length, CHECK); | |
| 2344 } | |
| 2345 parse_classfile_signature_attribute(cp, k, CHECK); | |
| 2346 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
| 2347 runtime_visible_annotations_length = attribute_length; | |
| 2348 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 2349 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 2350 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 2351 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 2352 runtime_invisible_annotations_length = attribute_length; | |
| 2353 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 2354 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 2355 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 2356 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
| 2357 if (parsed_enclosingmethod_attribute) { | |
| 2358 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
| 2359 } else { | |
| 2360 parsed_enclosingmethod_attribute = true; | |
| 2361 } | |
| 2362 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
| 2363 u2 class_index = cfs->get_u2_fast(); | |
| 2364 u2 method_index = cfs->get_u2_fast(); | |
| 2365 if (class_index == 0) { | |
| 2366 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2367 } | |
| 2368 // Validate the constant pool indices and types | |
| 2369 if (!cp->is_within_bounds(class_index) || | |
|
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|
2370 !is_klass_reference(cp, class_index)) { |
| 0 | 2371 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); |
| 2372 } | |
| 2373 if (method_index != 0 && | |
| 2374 (!cp->is_within_bounds(method_index) || | |
| 2375 !cp->tag_at(method_index).is_name_and_type())) { | |
| 2376 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2377 } | |
| 2378 k->set_enclosing_method_indices(class_index, method_index); | |
| 2379 } else { | |
| 2380 // Unknown attribute | |
| 2381 cfs->skip_u1(attribute_length, CHECK); | |
| 2382 } | |
| 2383 } else { | |
| 2384 // Unknown attribute | |
| 2385 cfs->skip_u1(attribute_length, CHECK); | |
| 2386 } | |
| 2387 } | |
| 2388 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
| 2389 runtime_visible_annotations_length, | |
| 2390 runtime_invisible_annotations, | |
| 2391 runtime_invisible_annotations_length, | |
| 2392 CHECK); | |
| 2393 k->set_class_annotations(annotations()); | |
| 2394 } | |
| 2395 | |
| 2396 | |
| 2397 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
| 2398 int runtime_visible_annotations_length, | |
| 2399 u1* runtime_invisible_annotations, | |
| 2400 int runtime_invisible_annotations_length, TRAPS) { | |
| 2401 typeArrayHandle annotations; | |
| 2402 if (runtime_visible_annotations != NULL || | |
| 2403 runtime_invisible_annotations != NULL) { | |
| 2404 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
| 2405 runtime_invisible_annotations_length, CHECK_(annotations)); | |
| 2406 annotations = typeArrayHandle(THREAD, anno); | |
| 2407 if (runtime_visible_annotations != NULL) { | |
| 2408 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
| 2409 } | |
| 2410 if (runtime_invisible_annotations != NULL) { | |
| 2411 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
| 2412 } | |
| 2413 } | |
| 2414 return annotations; | |
| 2415 } | |
| 2416 | |
| 2417 | |
| 2418 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
| 2419 KlassHandle h_k (THREAD, fd->field_holder()); | |
| 2420 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
| 2421 if (fd->has_initial_value()) { | |
| 2422 BasicType t = fd->field_type(); | |
| 2423 switch (t) { | |
| 2424 case T_BYTE: | |
| 2425 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
| 2426 break; | |
| 2427 case T_BOOLEAN: | |
| 2428 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
| 2429 break; | |
| 2430 case T_CHAR: | |
| 2431 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
| 2432 break; | |
| 2433 case T_SHORT: | |
| 2434 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
| 2435 break; | |
| 2436 case T_INT: | |
| 2437 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
| 2438 break; | |
| 2439 case T_FLOAT: | |
| 2440 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
| 2441 break; | |
| 2442 case T_DOUBLE: | |
| 2443 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
| 2444 break; | |
| 2445 case T_LONG: | |
| 2446 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
| 2447 break; | |
| 2448 case T_OBJECT: | |
| 2449 { | |
| 2450 #ifdef ASSERT | |
| 2451 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK); | |
| 2452 assert(fd->signature() == sym, "just checking"); | |
| 2453 #endif | |
| 2454 oop string = fd->string_initial_value(CHECK); | |
| 2455 h_k()->obj_field_put(fd->offset(), string); | |
| 2456 } | |
| 2457 break; | |
| 2458 default: | |
| 2459 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
| 2460 "Illegal ConstantValue attribute in class file"); | |
| 2461 } | |
| 2462 } | |
| 2463 } | |
| 2464 | |
| 2465 | |
| 2466 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
| 2467 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2468 // This code is for compatibility with earlier jdk's that do not | |
| 2469 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
| 2470 // the check for the "discovered" field should issue a warning if | |
| 2471 // the field is not found. For 1.6 this code should be issue a | |
| 2472 // fatal error if the "discovered" field is not found. | |
| 2473 // | |
| 2474 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2475 // next type of non-static oops leaves room for the fake oop. | |
| 2476 // Do not increment next_nonstatic_oop_offset so that the | |
| 2477 // fake oop is place after the java.lang.ref.Reference oop | |
| 2478 // fields. | |
| 2479 // | |
| 2480 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2481 // field. If it is not present, artifically create a field for it. | |
| 2482 // This allows this VM to run on early JDK where the field is not | |
| 2483 // present. | |
| 2484 | |
| 2485 // | |
| 2486 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2487 // next type of non-static oops leaves room for the fake oop. | |
| 2488 // Do not increment next_nonstatic_oop_offset so that the | |
| 2489 // fake oop is place after the java.lang.ref.Reference oop | |
| 2490 // fields. | |
| 2491 // | |
| 2492 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2493 // field. If it is not present, artifically create a field for it. | |
| 2494 // This allows this VM to run on early JDK where the field is not | |
| 2495 // present. | |
| 2496 int reference_sig_index = 0; | |
| 2497 int reference_name_index = 0; | |
| 2498 int reference_index = 0; | |
| 2499 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
| 2500 const int n = (*fields_ptr)()->length(); | |
| 2501 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
| 2502 int name_index = | |
| 2503 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
| 2504 int sig_index = | |
| 2505 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
| 2506 symbolOop f_name = cp->symbol_at(name_index); | |
| 2507 symbolOop f_sig = cp->symbol_at(sig_index); | |
| 2508 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { | |
| 2509 // Save the index for reference signature for later use. | |
| 2510 // The fake discovered field does not entries in the | |
| 2511 // constant pool so the index for its signature cannot | |
| 2512 // be extracted from the constant pool. It will need | |
| 2513 // later, however. It's signature is vmSymbols::reference_signature() | |
| 2514 // so same an index for that signature. | |
| 2515 reference_sig_index = sig_index; | |
| 2516 reference_name_index = name_index; | |
| 2517 reference_index = i; | |
| 2518 } | |
| 2519 if (f_name == vmSymbols::reference_discovered_name() && | |
| 2520 f_sig == vmSymbols::reference_signature()) { | |
| 2521 // The values below are fake but will force extra | |
| 2522 // non-static oop fields and a corresponding non-static | |
| 2523 // oop map block to be allocated. | |
| 2524 extra = 0; | |
| 2525 break; | |
| 2526 } | |
| 2527 } | |
| 2528 if (extra != 0) { | |
| 2529 fac_ptr->nonstatic_oop_count += extra; | |
| 2530 // Add the additional entry to "fields" so that the klass | |
| 2531 // contains the "discoverd" field and the field will be initialized | |
| 2532 // in instances of the object. | |
| 2533 int fields_with_fix_length = (*fields_ptr)()->length() + | |
| 2534 instanceKlass::next_offset; | |
| 2535 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
| 2536 fields_with_fix_length, CHECK); | |
| 2537 typeArrayHandle fields_with_fix(THREAD, ff); | |
| 2538 | |
| 2539 // Take everything from the original but the length. | |
| 2540 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
| 2541 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
| 2542 } | |
| 2543 | |
| 2544 // Add the fake field at the end. | |
| 2545 int i = (*fields_ptr)->length(); | |
| 2546 // There is no name index for the fake "discovered" field nor | |
| 2547 // signature but a signature is needed so that the field will | |
| 2548 // be properly initialized. Use one found for | |
| 2549 // one of the other reference fields. Be sure the index for the | |
| 2550 // name is 0. In fieldDescriptor::initialize() the index of the | |
| 2551 // name is checked. That check is by passed for the last nonstatic | |
| 2552 // oop field in a java.lang.ref.Reference which is assumed to be | |
| 2553 // this artificial "discovered" field. An assertion checks that | |
| 2554 // the name index is 0. | |
| 2555 assert(reference_index != 0, "Missing signature for reference"); | |
| 2556 | |
| 2557 int j; | |
| 2558 for (j = 0; j < instanceKlass::next_offset; j++) { | |
| 2559 fields_with_fix->ushort_at_put(i + j, | |
| 2560 (*fields_ptr)->ushort_at(reference_index +j)); | |
| 2561 } | |
| 2562 // Clear the public access flag and set the private access flag. | |
| 2563 short flags; | |
| 2564 flags = | |
| 2565 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
| 2566 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
| 2567 flags = flags & (~JVM_ACC_PUBLIC); | |
| 2568 flags = flags | JVM_ACC_PRIVATE; | |
| 2569 AccessFlags access_flags; | |
| 2570 access_flags.set_flags(flags); | |
| 2571 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
| 2572 assert(access_flags.is_private(), "Failed to set private flag"); | |
| 2573 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
| 2574 flags); | |
| 2575 | |
| 2576 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
| 2577 == reference_name_index, "The fake reference name is incorrect"); | |
| 2578 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
| 2579 == reference_sig_index, "The fake reference signature is incorrect"); | |
| 2580 // The type of the field is stored in the low_offset entry during | |
| 2581 // parsing. | |
| 2582 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
| 2583 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
| 2584 | |
| 2585 // "fields" is allocated in the permanent generation. Disgard | |
| 2586 // it and let it be collected. | |
| 2587 (*fields_ptr) = fields_with_fix; | |
| 2588 } | |
| 2589 return; | |
| 2590 } | |
| 2591 | |
| 2592 | |
| 2593 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
| 2594 FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2595 // Add fake fields for java.lang.Class instances | |
| 2596 // | |
| 2597 // This is not particularly nice. We should consider adding a | |
| 2598 // private transient object field at the Java level to | |
| 2599 // java.lang.Class. Alternatively we could add a subclass of | |
| 2600 // instanceKlass which provides an accessor and size computer for | |
| 2601 // this field, but that appears to be more code than this hack. | |
| 2602 // | |
| 2603 // NOTE that we wedge these in at the beginning rather than the | |
| 2604 // end of the object because the Class layout changed between JDK | |
| 2605 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
| 2606 // nonstatic oop fields were added at the Java level. The offsets | |
| 2607 // of these fake fields can't change between these two JDK | |
| 2608 // versions because when the offsets are computed at bootstrap | |
| 2609 // time we don't know yet which version of the JDK we're running in. | |
| 2610 | |
| 2611 // The values below are fake but will force two non-static oop fields and | |
| 2612 // a corresponding non-static oop map block to be allocated. | |
| 2613 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
| 2614 fac_ptr->nonstatic_oop_count += extra; | |
| 2615 } | |
| 2616 | |
| 2617 | |
| 2618 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
| 2619 // Cause the extra fake fields in java.lang.Class to show up before | |
| 2620 // the Java fields for layout compatibility between 1.3 and 1.4 | |
| 2621 // Incrementing next_nonstatic_oop_offset here advances the | |
| 2622 // location where the real java fields are placed. | |
| 2623 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
|
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|
2624 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
| 0 | 2625 } |
| 2626 | |
| 2627 | |
| 710 | 2628 // Force MethodHandle.vmentry to be an unmanaged pointer. |
| 2629 // There is no way for a classfile to express this, so we must help it. | |
| 2630 void ClassFileParser::java_dyn_MethodHandle_fix_pre(constantPoolHandle cp, | |
| 2631 typeArrayHandle* fields_ptr, | |
| 2632 FieldAllocationCount *fac_ptr, | |
| 2633 TRAPS) { | |
| 2634 // Add fake fields for java.dyn.MethodHandle instances | |
| 2635 // | |
| 2636 // This is not particularly nice, but since there is no way to express | |
| 2637 // a native wordSize field in Java, we must do it at this level. | |
| 2638 | |
| 2639 if (!EnableMethodHandles) return; | |
| 2640 | |
| 2641 int word_sig_index = 0; | |
| 2642 const int cp_size = cp->length(); | |
| 2643 for (int index = 1; index < cp_size; index++) { | |
| 2644 if (cp->tag_at(index).is_utf8() && | |
| 2645 cp->symbol_at(index) == vmSymbols::machine_word_signature()) { | |
| 2646 word_sig_index = index; | |
| 2647 break; | |
| 2648 } | |
| 2649 } | |
| 2650 | |
| 2651 if (word_sig_index == 0) | |
| 2652 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
| 2653 "missing I or J signature (for vmentry) in java.dyn.MethodHandle"); | |
| 2654 | |
| 2655 bool found_vmentry = false; | |
| 2656 | |
| 2657 const int n = (*fields_ptr)()->length(); | |
| 2658 for (int i = 0; i < n; i += instanceKlass::next_offset) { | |
| 2659 int name_index = (*fields_ptr)->ushort_at(i + instanceKlass::name_index_offset); | |
| 2660 int sig_index = (*fields_ptr)->ushort_at(i + instanceKlass::signature_index_offset); | |
| 2661 int acc_flags = (*fields_ptr)->ushort_at(i + instanceKlass::access_flags_offset); | |
| 2662 symbolOop f_name = cp->symbol_at(name_index); | |
| 2663 symbolOop f_sig = cp->symbol_at(sig_index); | |
| 2664 if (f_sig == vmSymbols::byte_signature() && | |
| 2665 f_name == vmSymbols::vmentry_name() && | |
| 2666 (acc_flags & JVM_ACC_STATIC) == 0) { | |
| 2667 // Adjust the field type from byte to an unmanaged pointer. | |
| 2668 assert(fac_ptr->nonstatic_byte_count > 0, ""); | |
| 2669 fac_ptr->nonstatic_byte_count -= 1; | |
| 2670 (*fields_ptr)->ushort_at_put(i + instanceKlass::signature_index_offset, | |
| 2671 word_sig_index); | |
| 1108 | 2672 fac_ptr->nonstatic_word_count += 1; |
| 2673 | |
| 2674 FieldAllocationType atype = (FieldAllocationType) (*fields_ptr)->ushort_at(i + instanceKlass::low_offset); | |
| 710 | 2675 assert(atype == NONSTATIC_BYTE, ""); |
| 2676 FieldAllocationType new_atype = NONSTATIC_WORD; | |
| 1108 | 2677 (*fields_ptr)->ushort_at_put(i + instanceKlass::low_offset, new_atype); |
| 710 | 2678 |
| 2679 found_vmentry = true; | |
| 2680 break; | |
| 2681 } | |
| 2682 } | |
| 2683 | |
| 2684 if (!found_vmentry) | |
| 2685 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
| 2686 "missing vmentry byte field in java.dyn.MethodHandle"); | |
| 2687 | |
| 2688 } | |
| 2689 | |
| 2690 | |
| 0 | 2691 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name, |
| 2692 Handle class_loader, | |
| 2693 Handle protection_domain, | |
| 710 | 2694 KlassHandle host_klass, |
|
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2695 GrowableArray<Handle>* cp_patches, |
| 0 | 2696 symbolHandle& parsed_name, |
|
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2697 bool verify, |
| 0 | 2698 TRAPS) { |
| 2699 // So that JVMTI can cache class file in the state before retransformable agents | |
| 2700 // have modified it | |
| 2701 unsigned char *cached_class_file_bytes = NULL; | |
| 2702 jint cached_class_file_length; | |
| 2703 | |
| 2704 ClassFileStream* cfs = stream(); | |
| 2705 // Timing | |
|
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2706 assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
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2707 JavaThread* jt = (JavaThread*) THREAD; |
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2708 |
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2709 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(), |
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2710 ClassLoader::perf_class_parse_selftime(), |
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2711 NULL, |
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2712 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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2713 jt->get_thread_stat()->perf_timers_addr(), |
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2714 PerfClassTraceTime::PARSE_CLASS); |
| 0 | 2715 |
| 2716 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
| 2717 | |
| 2718 if (JvmtiExport::should_post_class_file_load_hook()) { | |
| 2719 unsigned char* ptr = cfs->buffer(); | |
| 2720 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
| 2721 | |
| 2722 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
| 2723 &ptr, &end_ptr, | |
| 2724 &cached_class_file_bytes, | |
| 2725 &cached_class_file_length); | |
| 2726 | |
| 2727 if (ptr != cfs->buffer()) { | |
| 2728 // JVMTI agent has modified class file data. | |
| 2729 // Set new class file stream using JVMTI agent modified | |
| 2730 // class file data. | |
| 2731 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
| 2732 set_stream(cfs); | |
| 2733 } | |
| 2734 } | |
| 2735 | |
| 710 | 2736 _host_klass = host_klass; |
|
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2737 _cp_patches = cp_patches; |
| 0 | 2738 |
| 2739 instanceKlassHandle nullHandle; | |
| 2740 | |
| 2741 // Figure out whether we can skip format checking (matching classic VM behavior) | |
|
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2742 _need_verify = Verifier::should_verify_for(class_loader(), verify); |
| 0 | 2743 |
| 2744 // Set the verify flag in stream | |
| 2745 cfs->set_verify(_need_verify); | |
| 2746 | |
| 2747 // Save the class file name for easier error message printing. | |
| 2748 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name(); | |
| 2749 | |
| 2750 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
| 2751 // Magic value | |
| 2752 u4 magic = cfs->get_u4_fast(); | |
| 2753 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
| 2754 "Incompatible magic value %u in class file %s", | |
| 2755 magic, CHECK_(nullHandle)); | |
| 2756 | |
| 2757 // Version numbers | |
| 2758 u2 minor_version = cfs->get_u2_fast(); | |
| 2759 u2 major_version = cfs->get_u2_fast(); | |
| 2760 | |
| 2761 // Check version numbers - we check this even with verifier off | |
| 2762 if (!is_supported_version(major_version, minor_version)) { | |
| 2763 if (name.is_null()) { | |
| 2764 Exceptions::fthrow( | |
| 2765 THREAD_AND_LOCATION, | |
| 2766 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
| 2767 "Unsupported major.minor version %u.%u", | |
| 2768 major_version, | |
| 2769 minor_version); | |
| 2770 } else { | |
| 2771 ResourceMark rm(THREAD); | |
| 2772 Exceptions::fthrow( | |
| 2773 THREAD_AND_LOCATION, | |
| 2774 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
| 2775 "%s : Unsupported major.minor version %u.%u", | |
| 2776 name->as_C_string(), | |
| 2777 major_version, | |
| 2778 minor_version); | |
| 2779 } | |
| 2780 return nullHandle; | |
| 2781 } | |
| 2782 | |
| 2783 _major_version = major_version; | |
| 2784 _minor_version = minor_version; | |
| 2785 | |
| 2786 | |
| 2787 // Check if verification needs to be relaxed for this class file | |
| 2788 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
| 2789 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
| 2790 | |
| 2791 // Constant pool | |
| 2792 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
| 2793 int cp_size = cp->length(); | |
| 2794 | |
| 2795 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
| 2796 | |
| 2797 // Access flags | |
| 2798 AccessFlags access_flags; | |
| 2799 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
| 2800 | |
| 2801 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2802 // Set abstract bit for old class files for backward compatibility | |
| 2803 flags |= JVM_ACC_ABSTRACT; | |
| 2804 } | |
| 2805 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
| 2806 access_flags.set_flags(flags); | |
| 2807 | |
| 2808 // This class and superclass | |
| 2809 instanceKlassHandle super_klass; | |
| 2810 u2 this_class_index = cfs->get_u2_fast(); | |
| 2811 check_property( | |
| 2812 valid_cp_range(this_class_index, cp_size) && | |
| 2813 cp->tag_at(this_class_index).is_unresolved_klass(), | |
| 2814 "Invalid this class index %u in constant pool in class file %s", | |
| 2815 this_class_index, CHECK_(nullHandle)); | |
| 2816 | |
| 2817 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index)); | |
| 2818 assert(class_name.not_null(), "class_name can't be null"); | |
| 2819 | |
| 2820 // It's important to set parsed_name *before* resolving the super class. | |
| 2821 // (it's used for cleanup by the caller if parsing fails) | |
| 2822 parsed_name = class_name; | |
| 2823 | |
| 2824 // Update _class_name which could be null previously to be class_name | |
| 2825 _class_name = class_name; | |
| 2826 | |
| 2827 // Don't need to check whether this class name is legal or not. | |
| 2828 // It has been checked when constant pool is parsed. | |
| 2829 // However, make sure it is not an array type. | |
| 2830 if (_need_verify) { | |
| 2831 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 2832 "Bad class name in class file %s", | |
| 2833 CHECK_(nullHandle)); | |
| 2834 } | |
| 2835 | |
| 2836 klassOop preserve_this_klass; // for storing result across HandleMark | |
| 2837 | |
| 2838 // release all handles when parsing is done | |
| 2839 { HandleMark hm(THREAD); | |
| 2840 | |
| 2841 // Checks if name in class file matches requested name | |
| 2842 if (name.not_null() && class_name() != name()) { | |
| 2843 ResourceMark rm(THREAD); | |
| 2844 Exceptions::fthrow( | |
| 2845 THREAD_AND_LOCATION, | |
| 2846 vmSymbolHandles::java_lang_NoClassDefFoundError(), | |
| 2847 "%s (wrong name: %s)", | |
| 2848 name->as_C_string(), | |
| 2849 class_name->as_C_string() | |
| 2850 ); | |
| 2851 return nullHandle; | |
| 2852 } | |
| 2853 | |
| 2854 if (TraceClassLoadingPreorder) { | |
| 2855 tty->print("[Loading %s", name()->as_klass_external_name()); | |
| 2856 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); | |
| 2857 tty->print_cr("]"); | |
| 2858 } | |
| 2859 | |
| 2860 u2 super_class_index = cfs->get_u2_fast(); | |
| 2861 if (super_class_index == 0) { | |
| 2862 check_property(class_name() == vmSymbols::java_lang_Object(), | |
| 2863 "Invalid superclass index %u in class file %s", | |
| 2864 super_class_index, | |
| 2865 CHECK_(nullHandle)); | |
| 2866 } else { | |
| 2867 check_property(valid_cp_range(super_class_index, cp_size) && | |
|
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2868 is_klass_reference(cp, super_class_index), |
| 0 | 2869 "Invalid superclass index %u in class file %s", |
| 2870 super_class_index, | |
| 2871 CHECK_(nullHandle)); | |
| 2872 // The class name should be legal because it is checked when parsing constant pool. | |
| 2873 // However, make sure it is not an array type. | |
|
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2874 bool is_array = false; |
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2875 if (cp->tag_at(super_class_index).is_klass()) { |
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2876 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index)); |
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2877 if (_need_verify) |
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2878 is_array = super_klass->oop_is_array(); |
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2879 } else if (_need_verify) { |
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2880 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); |
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2881 } |
| 0 | 2882 if (_need_verify) { |
|
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2883 guarantee_property(!is_array, |
| 0 | 2884 "Bad superclass name in class file %s", CHECK_(nullHandle)); |
| 2885 } | |
| 2886 } | |
| 2887 | |
| 2888 // Interfaces | |
| 2889 u2 itfs_len = cfs->get_u2_fast(); | |
| 2890 objArrayHandle local_interfaces; | |
| 2891 if (itfs_len == 0) { | |
| 2892 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 2893 } else { | |
|
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2894 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle)); |
| 0 | 2895 } |
| 2896 | |
| 2897 // Fields (offsets are filled in later) | |
| 2898 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
| 2899 objArrayHandle fields_annotations; | |
| 2900 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
| 2901 // Methods | |
| 2902 bool has_final_method = false; | |
| 2903 AccessFlags promoted_flags; | |
| 2904 promoted_flags.set_flags(0); | |
| 2905 // These need to be oop pointers because they are allocated lazily | |
| 2906 // inside parse_methods inside a nested HandleMark | |
| 2907 objArrayOop methods_annotations_oop = NULL; | |
| 2908 objArrayOop methods_parameter_annotations_oop = NULL; | |
| 2909 objArrayOop methods_default_annotations_oop = NULL; | |
| 2910 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
| 2911 &promoted_flags, | |
| 2912 &has_final_method, | |
| 2913 &methods_annotations_oop, | |
| 2914 &methods_parameter_annotations_oop, | |
| 2915 &methods_default_annotations_oop, | |
| 2916 CHECK_(nullHandle)); | |
| 2917 | |
| 2918 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
| 2919 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
| 2920 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
| 2921 | |
| 2922 // We check super class after class file is parsed and format is checked | |
|
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2923 if (super_class_index > 0 && super_klass.is_null()) { |
| 0 | 2924 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index)); |
| 2925 if (access_flags.is_interface()) { | |
| 2926 // Before attempting to resolve the superclass, check for class format | |
| 2927 // errors not checked yet. | |
| 2928 guarantee_property(sk() == vmSymbols::java_lang_Object(), | |
| 2929 "Interfaces must have java.lang.Object as superclass in class file %s", | |
| 2930 CHECK_(nullHandle)); | |
| 2931 } | |
| 2932 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
| 2933 sk, | |
| 2934 class_loader, | |
| 2935 protection_domain, | |
| 2936 true, | |
| 2937 CHECK_(nullHandle)); | |
|
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2938 |
| 0 | 2939 KlassHandle kh (THREAD, k); |
| 2940 super_klass = instanceKlassHandle(THREAD, kh()); | |
|
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2941 if (LinkWellKnownClasses) // my super class is well known to me |
|
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2942 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve |
|
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2943 } |
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2944 if (super_klass.not_null()) { |
| 0 | 2945 if (super_klass->is_interface()) { |
| 2946 ResourceMark rm(THREAD); | |
| 2947 Exceptions::fthrow( | |
| 2948 THREAD_AND_LOCATION, | |
| 2949 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), | |
| 2950 "class %s has interface %s as super class", | |
| 2951 class_name->as_klass_external_name(), | |
| 2952 super_klass->external_name() | |
| 2953 ); | |
| 2954 return nullHandle; | |
| 2955 } | |
| 2956 // Make sure super class is not final | |
| 2957 if (super_klass->is_final()) { | |
| 2958 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
| 2959 } | |
| 2960 } | |
| 2961 | |
| 2962 // Compute the transitive list of all unique interfaces implemented by this class | |
| 2963 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
| 2964 | |
| 2965 // sort methods | |
| 2966 typeArrayHandle method_ordering = sort_methods(methods, | |
| 2967 methods_annotations, | |
| 2968 methods_parameter_annotations, | |
| 2969 methods_default_annotations, | |
| 2970 CHECK_(nullHandle)); | |
| 2971 | |
| 2972 // promote flags from parse_methods() to the klass' flags | |
| 2973 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
| 2974 | |
| 2975 // Size of Java vtable (in words) | |
| 2976 int vtable_size = 0; | |
| 2977 int itable_size = 0; | |
| 2978 int num_miranda_methods = 0; | |
| 2979 | |
| 2980 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
| 2981 num_miranda_methods, | |
| 2982 super_klass(), | |
| 2983 methods(), | |
| 2984 access_flags, | |
|
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2985 class_loader, |
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2986 class_name, |
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2987 local_interfaces(), |
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2988 CHECK_(nullHandle)); |
| 0 | 2989 |
| 2990 // Size of Java itable (in words) | |
| 2991 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
| 2992 | |
| 2993 // Field size and offset computation | |
| 2994 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
| 2995 #ifndef PRODUCT | |
| 2996 int orig_nonstatic_field_size = 0; | |
| 2997 #endif | |
| 2998 int static_field_size = 0; | |
| 2999 int next_static_oop_offset; | |
| 3000 int next_static_double_offset; | |
| 3001 int next_static_word_offset; | |
| 3002 int next_static_short_offset; | |
| 3003 int next_static_byte_offset; | |
| 3004 int next_static_type_offset; | |
| 3005 int next_nonstatic_oop_offset; | |
| 3006 int next_nonstatic_double_offset; | |
| 3007 int next_nonstatic_word_offset; | |
| 3008 int next_nonstatic_short_offset; | |
| 3009 int next_nonstatic_byte_offset; | |
| 3010 int next_nonstatic_type_offset; | |
| 3011 int first_nonstatic_oop_offset; | |
| 3012 int first_nonstatic_field_offset; | |
| 3013 int next_nonstatic_field_offset; | |
| 3014 | |
| 3015 // Calculate the starting byte offsets | |
| 3016 next_static_oop_offset = (instanceKlass::header_size() + | |
| 3017 align_object_offset(vtable_size) + | |
| 3018 align_object_offset(itable_size)) * wordSize; | |
| 3019 next_static_double_offset = next_static_oop_offset + | |
|
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3020 (fac.static_oop_count * heapOopSize); |
| 0 | 3021 if ( fac.static_double_count && |
| 3022 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
| 3023 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
| 3024 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
| 3025 } | |
| 3026 | |
| 3027 next_static_word_offset = next_static_double_offset + | |
| 3028 (fac.static_double_count * BytesPerLong); | |
| 3029 next_static_short_offset = next_static_word_offset + | |
| 3030 (fac.static_word_count * BytesPerInt); | |
| 3031 next_static_byte_offset = next_static_short_offset + | |
| 3032 (fac.static_short_count * BytesPerShort); | |
| 3033 next_static_type_offset = align_size_up((next_static_byte_offset + | |
| 3034 fac.static_byte_count ), wordSize ); | |
| 3035 static_field_size = (next_static_type_offset - | |
| 3036 next_static_oop_offset) / wordSize; | |
|
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3037 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + |
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3038 nonstatic_field_size * heapOopSize; |
| 0 | 3039 next_nonstatic_field_offset = first_nonstatic_field_offset; |
| 3040 | |
| 3041 // Add fake fields for java.lang.Class instances (also see below) | |
| 3042 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
| 3043 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); | |
| 3044 } | |
| 3045 | |
| 710 | 3046 // adjust the vmentry field declaration in java.dyn.MethodHandle |
| 3047 if (EnableMethodHandles && class_name() == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) { | |
| 3048 java_dyn_MethodHandle_fix_pre(cp, &fields, &fac, CHECK_(nullHandle)); | |
| 3049 } | |
| 3050 | |
| 0 | 3051 // Add a fake "discovered" field if it is not present |
| 3052 // for compatibility with earlier jdk's. | |
| 3053 if (class_name() == vmSymbols::java_lang_ref_Reference() | |
| 3054 && class_loader.is_null()) { | |
| 3055 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
| 3056 } | |
| 3057 // end of "discovered" field compactibility fix | |
| 3058 | |
|
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3059 unsigned int nonstatic_double_count = fac.nonstatic_double_count; |
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3060 unsigned int nonstatic_word_count = fac.nonstatic_word_count; |
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3061 unsigned int nonstatic_short_count = fac.nonstatic_short_count; |
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3062 unsigned int nonstatic_byte_count = fac.nonstatic_byte_count; |
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3063 unsigned int nonstatic_oop_count = fac.nonstatic_oop_count; |
| 0 | 3064 |
|
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3065 bool super_has_nonstatic_fields = |
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3066 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
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3067 bool has_nonstatic_fields = super_has_nonstatic_fields || |
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3068 ((nonstatic_double_count + nonstatic_word_count + |
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3069 nonstatic_short_count + nonstatic_byte_count + |
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3070 nonstatic_oop_count) != 0); |
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3071 |
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3072 |
|
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3073 // Prepare list of oops for oop map generation. |
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3074 int* nonstatic_oop_offsets; |
|
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3075 unsigned int* nonstatic_oop_counts; |
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3076 unsigned int nonstatic_oop_map_count = 0; |
| 0 | 3077 |
| 3078 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
|
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3079 THREAD, int, nonstatic_oop_count + 1); |
| 938 | 3080 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( |
|
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3081 THREAD, unsigned int, nonstatic_oop_count + 1); |
| 0 | 3082 |
| 3083 // Add fake fields for java.lang.Class instances (also see above). | |
| 3084 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
| 3085 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
| 3086 java_lang_Class_fix_post(&next_nonstatic_field_offset); | |
|
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3087 nonstatic_oop_offsets[0] = first_nonstatic_field_offset; |
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3088 const uint fake_oop_count = (next_nonstatic_field_offset - |
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3089 first_nonstatic_field_offset) / heapOopSize; |
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3090 nonstatic_oop_counts[0] = fake_oop_count; |
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3091 nonstatic_oop_map_count = 1; |
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3092 nonstatic_oop_count -= fake_oop_count; |
| 0 | 3093 first_nonstatic_oop_offset = first_nonstatic_field_offset; |
| 3094 } else { | |
| 3095 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
| 3096 } | |
| 3097 | |
| 3098 #ifndef PRODUCT | |
| 3099 if( PrintCompactFieldsSavings ) { | |
| 3100 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
|
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3101 (nonstatic_oop_count * heapOopSize); |
| 0 | 3102 if ( nonstatic_double_count > 0 ) { |
| 3103 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
| 3104 } | |
| 3105 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 3106 (nonstatic_double_count * BytesPerLong); | |
| 3107 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 3108 (nonstatic_word_count * BytesPerInt); | |
| 3109 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 3110 (nonstatic_short_count * BytesPerShort); | |
| 3111 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
|
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3112 nonstatic_byte_count ), heapOopSize ); |
| 0 | 3113 orig_nonstatic_field_size = nonstatic_field_size + |
|
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3114 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); |
| 0 | 3115 } |
| 3116 #endif | |
| 3117 bool compact_fields = CompactFields; | |
| 3118 int allocation_style = FieldsAllocationStyle; | |
|
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3119 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? |
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3120 assert(false, "0 <= FieldsAllocationStyle <= 2"); |
| 0 | 3121 allocation_style = 1; // Optimistic |
| 3122 } | |
| 3123 | |
| 3124 // The next classes have predefined hard-coded fields offsets | |
| 3125 // (see in JavaClasses::compute_hard_coded_offsets()). | |
| 3126 // Use default fields allocation order for them. | |
| 3127 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
| 3128 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() || | |
| 3129 class_name() == vmSymbols::java_lang_Class() || | |
| 3130 class_name() == vmSymbols::java_lang_ClassLoader() || | |
| 3131 class_name() == vmSymbols::java_lang_ref_Reference() || | |
| 3132 class_name() == vmSymbols::java_lang_ref_SoftReference() || | |
| 3133 class_name() == vmSymbols::java_lang_StackTraceElement() || | |
| 3134 class_name() == vmSymbols::java_lang_String() || | |
|
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3135 class_name() == vmSymbols::java_lang_Throwable() || |
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3136 class_name() == vmSymbols::java_lang_Boolean() || |
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3137 class_name() == vmSymbols::java_lang_Character() || |
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3138 class_name() == vmSymbols::java_lang_Float() || |
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3139 class_name() == vmSymbols::java_lang_Double() || |
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3140 class_name() == vmSymbols::java_lang_Byte() || |
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3141 class_name() == vmSymbols::java_lang_Short() || |
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3142 class_name() == vmSymbols::java_lang_Integer() || |
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3143 class_name() == vmSymbols::java_lang_Long())) { |
| 0 | 3144 allocation_style = 0; // Allocate oops first |
| 3145 compact_fields = false; // Don't compact fields | |
| 3146 } | |
| 3147 | |
| 3148 if( allocation_style == 0 ) { | |
| 3149 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
| 3150 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
| 3151 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
|
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3152 (nonstatic_oop_count * heapOopSize); |
| 0 | 3153 } else if( allocation_style == 1 ) { |
| 3154 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
| 3155 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
|
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3156 } else if( allocation_style == 2 ) { |
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3157 // Fields allocation: oops fields in super and sub classes are together. |
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3158 if( nonstatic_field_size > 0 && super_klass() != NULL && |
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3159 super_klass->nonstatic_oop_map_size() > 0 ) { |
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3160 int map_size = super_klass->nonstatic_oop_map_size(); |
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3161 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps(); |
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3162 OopMapBlock* last_map = first_map + map_size - 1; |
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3163 int next_offset = last_map->offset() + (last_map->count() * heapOopSize); |
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3164 if (next_offset == next_nonstatic_field_offset) { |
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3165 allocation_style = 0; // allocate oops first |
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3166 next_nonstatic_oop_offset = next_nonstatic_field_offset; |
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3167 next_nonstatic_double_offset = next_nonstatic_oop_offset + |
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3168 (nonstatic_oop_count * heapOopSize); |
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3169 } |
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3170 } |
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3171 if( allocation_style == 2 ) { |
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3172 allocation_style = 1; // allocate oops last |
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3173 next_nonstatic_double_offset = next_nonstatic_field_offset; |
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3174 } |
| 0 | 3175 } else { |
| 3176 ShouldNotReachHere(); | |
| 3177 } | |
| 3178 | |
| 3179 int nonstatic_oop_space_count = 0; | |
| 3180 int nonstatic_word_space_count = 0; | |
| 3181 int nonstatic_short_space_count = 0; | |
| 3182 int nonstatic_byte_space_count = 0; | |
| 3183 int nonstatic_oop_space_offset; | |
| 3184 int nonstatic_word_space_offset; | |
| 3185 int nonstatic_short_space_offset; | |
| 3186 int nonstatic_byte_space_offset; | |
| 3187 | |
|
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3188 if( nonstatic_double_count > 0 ) { |
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3189 int offset = next_nonstatic_double_offset; |
| 0 | 3190 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
| 3191 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
| 3192 // Allocate available fields into the gap before double field. | |
| 3193 int length = next_nonstatic_double_offset - offset; | |
| 3194 assert(length == BytesPerInt, ""); | |
| 3195 nonstatic_word_space_offset = offset; | |
| 3196 if( nonstatic_word_count > 0 ) { | |
| 3197 nonstatic_word_count -= 1; | |
| 3198 nonstatic_word_space_count = 1; // Only one will fit | |
| 3199 length -= BytesPerInt; | |
| 3200 offset += BytesPerInt; | |
| 3201 } | |
| 3202 nonstatic_short_space_offset = offset; | |
| 3203 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
| 3204 nonstatic_short_count -= 1; | |
| 3205 nonstatic_short_space_count += 1; | |
| 3206 length -= BytesPerShort; | |
| 3207 offset += BytesPerShort; | |
| 3208 } | |
| 3209 nonstatic_byte_space_offset = offset; | |
| 3210 while( length > 0 && nonstatic_byte_count > 0 ) { | |
| 3211 nonstatic_byte_count -= 1; | |
| 3212 nonstatic_byte_space_count += 1; | |
| 3213 length -= 1; | |
| 3214 } | |
| 3215 // Allocate oop field in the gap if there are no other fields for that. | |
| 3216 nonstatic_oop_space_offset = offset; | |
|
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3217 if( length >= heapOopSize && nonstatic_oop_count > 0 && |
| 0 | 3218 allocation_style != 0 ) { // when oop fields not first |
| 3219 nonstatic_oop_count -= 1; | |
| 3220 nonstatic_oop_space_count = 1; // Only one will fit | |
|
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3221 length -= heapOopSize; |
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3222 offset += heapOopSize; |
| 0 | 3223 } |
| 3224 } | |
| 3225 } | |
| 3226 | |
| 3227 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 3228 (nonstatic_double_count * BytesPerLong); | |
| 3229 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 3230 (nonstatic_word_count * BytesPerInt); | |
| 3231 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 3232 (nonstatic_short_count * BytesPerShort); | |
| 3233 | |
| 3234 int notaligned_offset; | |
| 3235 if( allocation_style == 0 ) { | |
| 3236 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 3237 } else { // allocation_style == 1 | |
| 3238 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 3239 if( nonstatic_oop_count > 0 ) { | |
|
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3240 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
| 0 | 3241 } |
|
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|
3242 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
| 0 | 3243 } |
|
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changeset
|
3244 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); |
| 0 | 3245 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset |
|
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|
3246 - first_nonstatic_field_offset)/heapOopSize); |
| 0 | 3247 |
| 3248 // Iterate over fields again and compute correct offsets. | |
| 3249 // The field allocation type was temporarily stored in the offset slot. | |
| 3250 // oop fields are located before non-oop fields (static and non-static). | |
| 3251 int len = fields->length(); | |
| 3252 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
| 3253 int real_offset; | |
| 1108 | 3254 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset); |
| 0 | 3255 switch (atype) { |
| 3256 case STATIC_OOP: | |
| 3257 real_offset = next_static_oop_offset; | |
|
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92
diff
changeset
|
3258 next_static_oop_offset += heapOopSize; |
| 0 | 3259 break; |
| 3260 case STATIC_BYTE: | |
| 3261 real_offset = next_static_byte_offset; | |
| 3262 next_static_byte_offset += 1; | |
| 3263 break; | |
| 3264 case STATIC_SHORT: | |
| 3265 real_offset = next_static_short_offset; | |
| 3266 next_static_short_offset += BytesPerShort; | |
| 3267 break; | |
| 3268 case STATIC_WORD: | |
| 3269 real_offset = next_static_word_offset; | |
| 3270 next_static_word_offset += BytesPerInt; | |
| 3271 break; | |
| 3272 case STATIC_ALIGNED_DOUBLE: | |
| 3273 case STATIC_DOUBLE: | |
| 3274 real_offset = next_static_double_offset; | |
| 3275 next_static_double_offset += BytesPerLong; | |
| 3276 break; | |
| 3277 case NONSTATIC_OOP: | |
| 3278 if( nonstatic_oop_space_count > 0 ) { | |
| 3279 real_offset = nonstatic_oop_space_offset; | |
|
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diff
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|
3280 nonstatic_oop_space_offset += heapOopSize; |
| 0 | 3281 nonstatic_oop_space_count -= 1; |
| 3282 } else { | |
| 3283 real_offset = next_nonstatic_oop_offset; | |
|
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|
3284 next_nonstatic_oop_offset += heapOopSize; |
| 0 | 3285 } |
| 3286 // Update oop maps | |
| 3287 if( nonstatic_oop_map_count > 0 && | |
| 3288 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
|
939
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diff
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|
3289 real_offset - |
|
9eebd3ac74cf
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diff
changeset
|
3290 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * |
|
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diff
changeset
|
3291 heapOopSize ) { |
| 0 | 3292 // Extend current oop map |
| 938 | 3293 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; |
| 0 | 3294 } else { |
| 3295 // Create new oop map | |
|
939
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diff
changeset
|
3296 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; |
| 938 | 3297 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; |
| 0 | 3298 nonstatic_oop_map_count += 1; |
| 3299 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
| 3300 first_nonstatic_oop_offset = real_offset; | |
| 3301 } | |
| 3302 } | |
| 3303 break; | |
| 3304 case NONSTATIC_BYTE: | |
| 3305 if( nonstatic_byte_space_count > 0 ) { | |
| 3306 real_offset = nonstatic_byte_space_offset; | |
| 3307 nonstatic_byte_space_offset += 1; | |
| 3308 nonstatic_byte_space_count -= 1; | |
| 3309 } else { | |
| 3310 real_offset = next_nonstatic_byte_offset; | |
| 3311 next_nonstatic_byte_offset += 1; | |
| 3312 } | |
| 3313 break; | |
| 3314 case NONSTATIC_SHORT: | |
| 3315 if( nonstatic_short_space_count > 0 ) { | |
| 3316 real_offset = nonstatic_short_space_offset; | |
| 3317 nonstatic_short_space_offset += BytesPerShort; | |
| 3318 nonstatic_short_space_count -= 1; | |
| 3319 } else { | |
| 3320 real_offset = next_nonstatic_short_offset; | |
| 3321 next_nonstatic_short_offset += BytesPerShort; | |
| 3322 } | |
| 3323 break; | |
| 3324 case NONSTATIC_WORD: | |
| 3325 if( nonstatic_word_space_count > 0 ) { | |
| 3326 real_offset = nonstatic_word_space_offset; | |
| 3327 nonstatic_word_space_offset += BytesPerInt; | |
| 3328 nonstatic_word_space_count -= 1; | |
| 3329 } else { | |
| 3330 real_offset = next_nonstatic_word_offset; | |
| 3331 next_nonstatic_word_offset += BytesPerInt; | |
| 3332 } | |
| 3333 break; | |
| 3334 case NONSTATIC_ALIGNED_DOUBLE: | |
| 3335 case NONSTATIC_DOUBLE: | |
| 3336 real_offset = next_nonstatic_double_offset; | |
| 3337 next_nonstatic_double_offset += BytesPerLong; | |
| 3338 break; | |
| 3339 default: | |
| 3340 ShouldNotReachHere(); | |
| 3341 } | |
| 1108 | 3342 fields->short_at_put(i + instanceKlass::low_offset, extract_low_short_from_int(real_offset)); |
| 3343 fields->short_at_put(i + instanceKlass::high_offset, extract_high_short_from_int(real_offset)); | |
| 0 | 3344 } |
| 3345 | |
| 3346 // Size of instances | |
| 3347 int instance_size; | |
| 3348 | |
|
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diff
changeset
|
3349 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); |
| 0 | 3350 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); |
| 3351 | |
|
165
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changeset
|
3352 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 | 3353 |
| 938 | 3354 // Number of non-static oop map blocks allocated at end of klass. |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3355 const unsigned int total_oop_map_count = |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3356 compute_oop_map_count(super_klass, nonstatic_oop_map_count, |
|
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jcoomes
parents:
938
diff
changeset
|
3357 first_nonstatic_oop_offset); |
| 0 | 3358 |
| 3359 // Compute reference type | |
| 3360 ReferenceType rt; | |
| 3361 if (super_klass() == NULL) { | |
| 3362 rt = REF_NONE; | |
| 3363 } else { | |
| 3364 rt = super_klass->reference_type(); | |
| 3365 } | |
| 3366 | |
| 3367 // We can now create the basic klassOop for this klass | |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3368 klassOop ik = oopFactory::new_instanceKlass(vtable_size, itable_size, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3369 static_field_size, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3370 total_oop_map_count, |
|
9eebd3ac74cf
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jcoomes
parents:
938
diff
changeset
|
3371 rt, CHECK_(nullHandle)); |
| 0 | 3372 instanceKlassHandle this_klass (THREAD, ik); |
| 3373 | |
| 938 | 3374 assert(this_klass->static_field_size() == static_field_size, "sanity"); |
| 3375 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count, | |
| 3376 "sanity"); | |
| 0 | 3377 |
| 3378 // Fill in information already parsed | |
| 3379 this_klass->set_access_flags(access_flags); | |
| 975 | 3380 this_klass->set_should_verify_class(verify); |
| 0 | 3381 jint lh = Klass::instance_layout_helper(instance_size, false); |
| 3382 this_klass->set_layout_helper(lh); | |
| 3383 assert(this_klass->oop_is_instance(), "layout is correct"); | |
| 3384 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
| 3385 // Not yet: supers are done below to support the new subtype-checking fields | |
| 3386 //this_klass->set_super(super_klass()); | |
| 3387 this_klass->set_class_loader(class_loader()); | |
| 3388 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
| 975 | 3389 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
| 0 | 3390 this_klass->set_static_oop_field_size(fac.static_oop_count); |
| 3391 cp->set_pool_holder(this_klass()); | |
| 3392 this_klass->set_constants(cp()); | |
| 3393 this_klass->set_local_interfaces(local_interfaces()); | |
| 3394 this_klass->set_fields(fields()); | |
| 3395 this_klass->set_methods(methods()); | |
| 3396 if (has_final_method) { | |
| 3397 this_klass->set_has_final_method(); | |
| 3398 } | |
| 3399 this_klass->set_method_ordering(method_ordering()); | |
|
977
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3400 // The instanceKlass::_methods_jmethod_ids cache and the |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3401 // instanceKlass::_methods_cached_itable_indices cache are |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3402 // both managed on the assumption that the initial cache |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3403 // 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
|
3404 // that changes, then instanceKlass::idnum_can_increment() |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3405 // has to be changed accordingly. |
| 0 | 3406 this_klass->set_initial_method_idnum(methods->length()); |
| 3407 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
| 710 | 3408 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself |
|
474
7a018855d2f0
6779339: turn off LinkWellKnownClasses by default pending further testing
jrose
parents:
431
diff
changeset
|
3409 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve |
| 0 | 3410 this_klass->set_protection_domain(protection_domain()); |
| 3411 this_klass->set_fields_annotations(fields_annotations()); | |
| 3412 this_klass->set_methods_annotations(methods_annotations()); | |
| 3413 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
| 3414 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
| 3415 | |
| 3416 this_klass->set_minor_version(minor_version); | |
| 3417 this_klass->set_major_version(major_version); | |
| 3418 | |
|
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3419 // 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
|
3420 // (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
|
3421 // 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
parents:
710
diff
changeset
|
3422 // when everything is fresh in memory.) |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3423 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
parents:
710
diff
changeset
|
3424 for (int j = 0; j < methods->length(); j++) { |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3425 ((methodOop)methods->obj_at(j))->init_intrinsic_id(); |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3426 } |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3427 } |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3428 |
| 0 | 3429 if (cached_class_file_bytes != NULL) { |
| 3430 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
| 3431 this_klass->set_cached_class_file(cached_class_file_bytes, | |
| 3432 cached_class_file_length); | |
| 3433 } | |
| 3434 | |
| 3435 // Miranda methods | |
| 3436 if ((num_miranda_methods > 0) || | |
| 3437 // if this class introduced new miranda methods or | |
| 3438 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
| 3439 // super class exists and this class inherited miranda methods | |
| 3440 ) { | |
| 3441 this_klass->set_has_miranda_methods(); // then set a flag | |
| 3442 } | |
| 3443 | |
| 3444 // Additional attributes | |
| 3445 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
| 3446 | |
| 3447 // Make sure this is the end of class file stream | |
| 3448 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
| 3449 | |
| 3450 // Initialize static fields | |
| 3451 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
| 3452 | |
| 3453 // VerifyOops believes that once this has been set, the object is completely loaded. | |
| 3454 // Compute transitive closure of interfaces this class implements | |
| 3455 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
| 3456 | |
| 3457 // Fill in information needed to compute superclasses. | |
| 3458 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
| 3459 | |
| 3460 // Initialize itable offset tables | |
| 3461 klassItable::setup_itable_offset_table(this_klass); | |
| 3462 | |
| 3463 // Do final class setup | |
| 938 | 3464 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts); |
| 0 | 3465 |
| 3466 set_precomputed_flags(this_klass); | |
| 3467 | |
| 3468 // reinitialize modifiers, using the InnerClasses attribute | |
| 3469 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
| 3470 this_klass->set_modifier_flags(computed_modifiers); | |
| 3471 | |
| 3472 // check if this class can access its super class | |
| 3473 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
| 3474 | |
| 3475 // check if this class can access its superinterfaces | |
| 3476 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
| 3477 | |
| 3478 // check if this class overrides any final method | |
| 3479 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
| 3480 | |
| 3481 // check that if this class is an interface then it doesn't have static methods | |
| 3482 if (this_klass->is_interface()) { | |
| 3483 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
| 3484 } | |
| 3485 | |
| 3486 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
| 3487 false /* not shared class */); | |
| 3488 | |
| 3489 if (TraceClassLoading) { | |
| 3490 // print in a single call to reduce interleaving of output | |
| 3491 if (cfs->source() != NULL) { | |
| 3492 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3493 cfs->source()); | |
| 3494 } else if (class_loader.is_null()) { | |
| 3495 if (THREAD->is_Java_thread()) { | |
| 3496 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
| 3497 tty->print("[Loaded %s by instance of %s]\n", | |
| 3498 this_klass->external_name(), | |
| 3499 instanceKlass::cast(caller)->external_name()); | |
| 3500 } else { | |
| 3501 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
| 3502 } | |
| 3503 } else { | |
| 3504 ResourceMark rm; | |
| 3505 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3506 instanceKlass::cast(class_loader->klass())->external_name()); | |
| 3507 } | |
| 3508 } | |
| 3509 | |
| 3510 if (TraceClassResolution) { | |
| 3511 // print out the superclass. | |
| 3512 const char * from = Klass::cast(this_klass())->external_name(); | |
| 3513 if (this_klass->java_super() != NULL) { | |
|
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
652
diff
changeset
|
3514 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); |
| 0 | 3515 } |
| 3516 // print out each of the interface classes referred to by this class. | |
| 3517 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
| 3518 if (!local_interfaces.is_null()) { | |
| 3519 int length = local_interfaces->length(); | |
| 3520 for (int i = 0; i < length; i++) { | |
| 3521 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3522 instanceKlass* to_class = instanceKlass::cast(k); | |
| 3523 const char * to = to_class->external_name(); | |
|
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
652
diff
changeset
|
3524 tty->print("RESOLVE %s %s (interface)\n", from, to); |
| 0 | 3525 } |
| 3526 } | |
| 3527 } | |
| 3528 | |
| 3529 #ifndef PRODUCT | |
| 3530 if( PrintCompactFieldsSavings ) { | |
| 3531 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
|
165
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kvn
parents:
136
diff
changeset
|
3532 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
|
3533 (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
|
3534 orig_nonstatic_field_size*heapOopSize, |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3535 this_klass->external_name()); |
| 0 | 3536 } 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
|
3537 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
|
3538 (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
|
3539 orig_nonstatic_field_size*heapOopSize, |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
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136
diff
changeset
|
3540 this_klass->external_name()); |
| 0 | 3541 } |
| 3542 } | |
| 3543 #endif | |
| 3544 | |
| 3545 // preserve result across HandleMark | |
| 3546 preserve_this_klass = this_klass(); | |
| 3547 } | |
| 3548 | |
| 3549 // Create new handle outside HandleMark | |
| 3550 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
| 3551 debug_only(this_klass->as_klassOop()->verify();) | |
| 3552 | |
| 3553 return this_klass; | |
| 3554 } | |
| 3555 | |
| 3556 | |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3557 unsigned int |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3558 ClassFileParser::compute_oop_map_count(instanceKlassHandle super, |
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3559 unsigned int nonstatic_oop_map_count, |
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3560 int first_nonstatic_oop_offset) { |
|
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3561 unsigned int map_count = |
|
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3562 super.is_null() ? 0 : super->nonstatic_oop_map_count(); |
| 0 | 3563 if (nonstatic_oop_map_count > 0) { |
| 3564 // We have oops to add to map | |
| 938 | 3565 if (map_count == 0) { |
| 3566 map_count = nonstatic_oop_map_count; | |
| 0 | 3567 } else { |
| 938 | 3568 // Check whether we should add a new map block or whether the last one can |
| 3569 // be extended | |
| 3570 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); | |
| 3571 OopMapBlock* const last_map = first_map + map_count - 1; | |
| 3572 | |
| 3573 int next_offset = last_map->offset() + last_map->count() * heapOopSize; | |
| 0 | 3574 if (next_offset == first_nonstatic_oop_offset) { |
| 3575 // There is no gap bettwen superklass's last oop field and first | |
| 3576 // local oop field, merge maps. | |
| 3577 nonstatic_oop_map_count -= 1; | |
| 3578 } else { | |
| 3579 // Superklass didn't end with a oop field, add extra maps | |
| 938 | 3580 assert(next_offset < first_nonstatic_oop_offset, "just checking"); |
| 0 | 3581 } |
| 938 | 3582 map_count += nonstatic_oop_map_count; |
| 0 | 3583 } |
| 3584 } | |
| 938 | 3585 return map_count; |
| 0 | 3586 } |
| 3587 | |
| 3588 | |
| 3589 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
|
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|
3590 unsigned int nonstatic_oop_map_count, |
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3591 int* nonstatic_oop_offsets, |
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3592 unsigned int* nonstatic_oop_counts) { |
| 0 | 3593 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); |
| 938 | 3594 const instanceKlass* const super = k->superklass(); |
|
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3595 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; |
| 938 | 3596 if (super_count > 0) { |
| 3597 // Copy maps from superklass | |
| 0 | 3598 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); |
|
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3599 for (unsigned int i = 0; i < super_count; ++i) { |
| 0 | 3600 *this_oop_map++ = *super_oop_map++; |
| 3601 } | |
| 3602 } | |
| 938 | 3603 |
| 0 | 3604 if (nonstatic_oop_map_count > 0) { |
| 938 | 3605 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { |
| 3606 // The counts differ because there is no gap between superklass's last oop | |
| 3607 // field and the first local oop field. Extend the last oop map copied | |
| 0 | 3608 // from the superklass instead of creating new one. |
| 3609 nonstatic_oop_map_count--; | |
| 3610 nonstatic_oop_offsets++; | |
| 3611 this_oop_map--; | |
| 938 | 3612 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); |
| 0 | 3613 this_oop_map++; |
| 3614 } | |
| 938 | 3615 |
| 0 | 3616 // Add new map blocks, fill them |
| 3617 while (nonstatic_oop_map_count-- > 0) { | |
| 3618 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
| 938 | 3619 this_oop_map->set_count(*nonstatic_oop_counts++); |
| 0 | 3620 this_oop_map++; |
| 3621 } | |
| 938 | 3622 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == |
| 3623 this_oop_map, "sanity"); | |
| 0 | 3624 } |
| 3625 } | |
| 3626 | |
| 3627 | |
| 3628 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
| 3629 klassOop super = k->super(); | |
| 3630 | |
| 3631 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
| 3632 // in which case we don't have to register objects as finalizable | |
| 3633 if (!_has_empty_finalizer) { | |
| 3634 if (_has_finalizer || | |
| 3635 (super != NULL && super->klass_part()->has_finalizer())) { | |
| 3636 k->set_has_finalizer(); | |
| 3637 } | |
| 3638 } | |
| 3639 | |
| 3640 #ifdef ASSERT | |
| 3641 bool f = false; | |
| 3642 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
| 3643 vmSymbols::void_method_signature()); | |
| 3644 if (m != NULL && !m->is_empty_method()) { | |
| 3645 f = true; | |
| 3646 } | |
| 3647 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
| 3648 #endif | |
| 3649 | |
| 3650 // Check if this klass supports the java.lang.Cloneable interface | |
| 1142 | 3651 if (SystemDictionary::Cloneable_klass_loaded()) { |
| 3652 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) { | |
| 0 | 3653 k->set_is_cloneable(); |
| 3654 } | |
| 3655 } | |
| 3656 | |
| 3657 // Check if this klass has a vanilla default constructor | |
| 3658 if (super == NULL) { | |
| 3659 // java.lang.Object has empty default constructor | |
| 3660 k->set_has_vanilla_constructor(); | |
| 3661 } else { | |
| 3662 if (Klass::cast(super)->has_vanilla_constructor() && | |
| 3663 _has_vanilla_constructor) { | |
| 3664 k->set_has_vanilla_constructor(); | |
| 3665 } | |
| 3666 #ifdef ASSERT | |
| 3667 bool v = false; | |
| 3668 if (Klass::cast(super)->has_vanilla_constructor()) { | |
| 3669 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
| 3670 ), vmSymbols::void_method_signature()); | |
| 3671 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
| 3672 v = true; | |
| 3673 } | |
| 3674 } | |
| 3675 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
| 3676 #endif | |
| 3677 } | |
| 3678 | |
| 3679 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
| 3680 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
| 3681 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
| 3682 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
| 3683 || k->is_abstract() || k->is_interface() | |
| 3684 || (k->name() == vmSymbols::java_lang_Class() | |
| 3685 && k->class_loader() == NULL) | |
| 3686 || k->size_helper() >= FastAllocateSizeLimit) { | |
| 3687 // Forbid fast-path allocation. | |
| 3688 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
| 3689 k->set_layout_helper(lh); | |
| 3690 } | |
| 3691 } | |
| 3692 | |
| 3693 | |
| 3694 // utility method for appending and array with check for duplicates | |
| 3695 | |
| 3696 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
| 3697 // iterate over new interfaces | |
| 3698 for (int i = 0; i < ifs->length(); i++) { | |
| 3699 oop e = ifs->obj_at(i); | |
| 3700 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
| 3701 // check for duplicates | |
| 3702 bool duplicate = false; | |
| 3703 for (int j = 0; j < index; j++) { | |
| 3704 if (result->obj_at(j) == e) { | |
| 3705 duplicate = true; | |
| 3706 break; | |
| 3707 } | |
| 3708 } | |
| 3709 // add new interface | |
| 3710 if (!duplicate) { | |
| 3711 result->obj_at_put(index++, e); | |
| 3712 } | |
| 3713 } | |
| 3714 } | |
| 3715 | |
| 3716 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
| 3717 // Compute maximum size for transitive interfaces | |
| 3718 int max_transitive_size = 0; | |
| 3719 int super_size = 0; | |
| 3720 // Add superclass transitive interfaces size | |
| 3721 if (super.not_null()) { | |
| 3722 super_size = super->transitive_interfaces()->length(); | |
| 3723 max_transitive_size += super_size; | |
| 3724 } | |
| 3725 // Add local interfaces' super interfaces | |
| 3726 int local_size = local_ifs->length(); | |
| 3727 for (int i = 0; i < local_size; i++) { | |
| 3728 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3729 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
| 3730 } | |
| 3731 // Finally add local interfaces | |
| 3732 max_transitive_size += local_size; | |
| 3733 // Construct array | |
| 3734 objArrayHandle result; | |
| 3735 if (max_transitive_size == 0) { | |
| 3736 // no interfaces, use canonicalized array | |
| 3737 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 3738 } else if (max_transitive_size == super_size) { | |
| 3739 // no new local interfaces added, share superklass' transitive interface array | |
| 3740 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
| 3741 } else if (max_transitive_size == local_size) { | |
| 3742 // only local interfaces added, share local interface array | |
| 3743 result = local_ifs; | |
| 3744 } else { | |
| 3745 objArrayHandle nullHandle; | |
| 3746 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
| 3747 result = objArrayHandle(THREAD, new_objarray); | |
| 3748 int index = 0; | |
| 3749 // Copy down from superclass | |
| 3750 if (super.not_null()) { | |
| 3751 append_interfaces(result, index, super->transitive_interfaces()); | |
| 3752 } | |
| 3753 // Copy down from local interfaces' superinterfaces | |
| 3754 for (int i = 0; i < local_ifs->length(); i++) { | |
| 3755 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3756 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
| 3757 } | |
| 3758 // Finally add local interfaces | |
| 3759 append_interfaces(result, index, local_ifs()); | |
| 3760 | |
| 3761 // Check if duplicates were removed | |
| 3762 if (index != max_transitive_size) { | |
| 3763 assert(index < max_transitive_size, "just checking"); | |
| 3764 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
| 3765 for (int i = 0; i < index; i++) { | |
| 3766 oop e = result->obj_at(i); | |
| 3767 assert(e != NULL, "just checking"); | |
| 3768 new_result->obj_at_put(i, e); | |
| 3769 } | |
| 3770 result = objArrayHandle(THREAD, new_result); | |
| 3771 } | |
| 3772 } | |
| 3773 return result; | |
| 3774 } | |
| 3775 | |
| 3776 | |
| 3777 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3778 klassOop super = this_klass->super(); | |
| 3779 if ((super != NULL) && | |
| 3780 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
| 3781 ResourceMark rm(THREAD); | |
| 3782 Exceptions::fthrow( | |
| 3783 THREAD_AND_LOCATION, | |
| 3784 vmSymbolHandles::java_lang_IllegalAccessError(), | |
| 3785 "class %s cannot access its superclass %s", | |
| 3786 this_klass->external_name(), | |
| 3787 instanceKlass::cast(super)->external_name() | |
| 3788 ); | |
| 3789 return; | |
| 3790 } | |
| 3791 } | |
| 3792 | |
| 3793 | |
| 3794 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3795 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
| 3796 int lng = local_interfaces->length(); | |
| 3797 for (int i = lng - 1; i >= 0; i--) { | |
| 3798 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3799 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
| 3800 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
| 3801 ResourceMark rm(THREAD); | |
| 3802 Exceptions::fthrow( | |
| 3803 THREAD_AND_LOCATION, | |
| 3804 vmSymbolHandles::java_lang_IllegalAccessError(), | |
| 3805 "class %s cannot access its superinterface %s", | |
| 3806 this_klass->external_name(), | |
| 3807 instanceKlass::cast(k)->external_name() | |
| 3808 ); | |
| 3809 return; | |
| 3810 } | |
| 3811 } | |
| 3812 } | |
| 3813 | |
| 3814 | |
| 3815 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
| 3816 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3817 int num_methods = methods->length(); | |
| 3818 | |
| 3819 // go thru each method and check if it overrides a final method | |
| 3820 for (int index = 0; index < num_methods; index++) { | |
| 3821 methodOop m = (methodOop)methods->obj_at(index); | |
| 3822 | |
| 3823 // skip private, static and <init> methods | |
| 3824 if ((!m->is_private()) && | |
| 3825 (!m->is_static()) && | |
| 3826 (m->name() != vmSymbols::object_initializer_name())) { | |
| 3827 | |
| 3828 symbolOop name = m->name(); | |
| 3829 symbolOop signature = m->signature(); | |
| 3830 klassOop k = this_klass->super(); | |
| 3831 methodOop super_m = NULL; | |
| 3832 while (k != NULL) { | |
| 3833 // skip supers that don't have final methods. | |
| 3834 if (k->klass_part()->has_final_method()) { | |
| 3835 // lookup a matching method in the super class hierarchy | |
| 3836 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
| 3837 if (super_m == NULL) { | |
| 3838 break; // didn't find any match; get out | |
| 3839 } | |
| 3840 | |
| 3841 if (super_m->is_final() && | |
| 3842 // matching method in super is final | |
| 3843 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
| 3844 super_m->method_holder(), | |
| 3845 super_m->method_holder(), | |
| 3846 super_m->access_flags(), false)) | |
| 3847 // this class can access super final method and therefore override | |
| 3848 ) { | |
| 3849 ResourceMark rm(THREAD); | |
| 3850 Exceptions::fthrow( | |
| 3851 THREAD_AND_LOCATION, | |
| 3852 vmSymbolHandles::java_lang_VerifyError(), | |
| 3853 "class %s overrides final method %s.%s", | |
| 3854 this_klass->external_name(), | |
| 3855 name->as_C_string(), | |
| 3856 signature->as_C_string() | |
| 3857 ); | |
| 3858 return; | |
| 3859 } | |
| 3860 | |
| 3861 // continue to look from super_m's holder's super. | |
| 3862 k = instanceKlass::cast(super_m->method_holder())->super(); | |
| 3863 continue; | |
| 3864 } | |
| 3865 | |
| 3866 k = k->klass_part()->super(); | |
| 3867 } | |
| 3868 } | |
| 3869 } | |
| 3870 } | |
| 3871 | |
| 3872 | |
| 3873 // assumes that this_klass is an interface | |
| 3874 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
| 3875 assert(this_klass->is_interface(), "not an interface"); | |
| 3876 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3877 int num_methods = methods->length(); | |
| 3878 | |
| 3879 for (int index = 0; index < num_methods; index++) { | |
| 3880 methodOop m = (methodOop)methods->obj_at(index); | |
| 3881 // if m is static and not the init method, throw a verify error | |
| 3882 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
| 3883 ResourceMark rm(THREAD); | |
| 3884 Exceptions::fthrow( | |
| 3885 THREAD_AND_LOCATION, | |
| 3886 vmSymbolHandles::java_lang_VerifyError(), | |
| 3887 "Illegal static method %s in interface %s", | |
| 3888 m->name()->as_C_string(), | |
| 3889 this_klass->external_name() | |
| 3890 ); | |
| 3891 return; | |
| 3892 } | |
| 3893 } | |
| 3894 } | |
| 3895 | |
| 3896 // utility methods for format checking | |
| 3897 | |
| 3898 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
| 3899 if (!_need_verify) { return; } | |
| 3900 | |
| 3901 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
| 3902 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 3903 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3904 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
| 3905 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 3906 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
| 3907 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3908 | |
| 3909 if ((is_abstract && is_final) || | |
| 3910 (is_interface && !is_abstract) || | |
| 3911 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
| 3912 (!is_interface && major_gte_15 && is_annotation)) { | |
| 3913 ResourceMark rm(THREAD); | |
| 3914 Exceptions::fthrow( | |
| 3915 THREAD_AND_LOCATION, | |
| 3916 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3917 "Illegal class modifiers in class %s: 0x%X", | |
| 3918 _class_name->as_C_string(), flags | |
| 3919 ); | |
| 3920 return; | |
| 3921 } | |
| 3922 } | |
| 3923 | |
| 3924 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
| 3925 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3926 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 3927 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3928 | |
| 3929 return ((is_public && is_protected) || | |
| 3930 (is_public && is_private) || | |
| 3931 (is_protected && is_private)); | |
| 3932 } | |
| 3933 | |
| 3934 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
|
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|
3935 u2 max_version = |
|
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|
3936 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION : |
|
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|
3937 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION); |
| 0 | 3938 return (major >= JAVA_MIN_SUPPORTED_VERSION) && |
|
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|
3939 (major <= max_version) && |
|
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|
3940 ((major != max_version) || |
| 0 | 3941 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); |
| 3942 } | |
| 3943 | |
| 3944 void ClassFileParser::verify_legal_field_modifiers( | |
| 3945 jint flags, bool is_interface, TRAPS) { | |
| 3946 if (!_need_verify) { return; } | |
| 3947 | |
| 3948 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3949 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 3950 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3951 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 3952 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3953 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
| 3954 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
| 3955 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 3956 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3957 | |
| 3958 bool is_illegal = false; | |
| 3959 | |
| 3960 if (is_interface) { | |
| 3961 if (!is_public || !is_static || !is_final || is_private || | |
| 3962 is_protected || is_volatile || is_transient || | |
| 3963 (major_gte_15 && is_enum)) { | |
| 3964 is_illegal = true; | |
| 3965 } | |
| 3966 } else { // not interface | |
| 3967 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
| 3968 is_illegal = true; | |
| 3969 } | |
| 3970 } | |
| 3971 | |
| 3972 if (is_illegal) { | |
| 3973 ResourceMark rm(THREAD); | |
| 3974 Exceptions::fthrow( | |
| 3975 THREAD_AND_LOCATION, | |
| 3976 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3977 "Illegal field modifiers in class %s: 0x%X", | |
| 3978 _class_name->as_C_string(), flags); | |
| 3979 return; | |
| 3980 } | |
| 3981 } | |
| 3982 | |
| 3983 void ClassFileParser::verify_legal_method_modifiers( | |
| 3984 jint flags, bool is_interface, symbolHandle name, TRAPS) { | |
| 3985 if (!_need_verify) { return; } | |
| 3986 | |
| 3987 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3988 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3989 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 3990 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3991 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
| 3992 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 3993 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
| 3994 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
| 3995 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
| 3996 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3997 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
| 3998 | |
| 3999 bool is_illegal = false; | |
| 4000 | |
| 4001 if (is_interface) { | |
| 4002 if (!is_abstract || !is_public || is_static || is_final || | |
| 4003 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
| 4004 is_illegal = true; | |
| 4005 } | |
| 4006 } else { // not interface | |
| 4007 if (is_initializer) { | |
| 4008 if (is_static || is_final || is_synchronized || is_native || | |
| 4009 is_abstract || (major_gte_15 && is_bridge)) { | |
| 4010 is_illegal = true; | |
| 4011 } | |
| 4012 } else { // not initializer | |
| 4013 if (is_abstract) { | |
| 4014 if ((is_final || is_native || is_private || is_static || | |
| 4015 (major_gte_15 && (is_synchronized || is_strict)))) { | |
| 4016 is_illegal = true; | |
| 4017 } | |
| 4018 } | |
| 4019 if (has_illegal_visibility(flags)) { | |
| 4020 is_illegal = true; | |
| 4021 } | |
| 4022 } | |
| 4023 } | |
| 4024 | |
| 4025 if (is_illegal) { | |
| 4026 ResourceMark rm(THREAD); | |
| 4027 Exceptions::fthrow( | |
| 4028 THREAD_AND_LOCATION, | |
| 4029 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4030 "Method %s in class %s has illegal modifiers: 0x%X", | |
| 4031 name->as_C_string(), _class_name->as_C_string(), flags); | |
| 4032 return; | |
| 4033 } | |
| 4034 } | |
| 4035 | |
| 4036 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
| 4037 assert(_need_verify, "only called when _need_verify is true"); | |
| 4038 int i = 0; | |
| 4039 int count = length >> 2; | |
| 4040 for (int k=0; k<count; k++) { | |
| 4041 unsigned char b0 = buffer[i]; | |
| 4042 unsigned char b1 = buffer[i+1]; | |
| 4043 unsigned char b2 = buffer[i+2]; | |
| 4044 unsigned char b3 = buffer[i+3]; | |
| 4045 // For an unsigned char v, | |
| 4046 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
| 4047 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
| 4048 unsigned char res = b0 | b0 - 1 | | |
| 4049 b1 | b1 - 1 | | |
| 4050 b2 | b2 - 1 | | |
| 4051 b3 | b3 - 1; | |
| 4052 if (res >= 128) break; | |
| 4053 i += 4; | |
| 4054 } | |
| 4055 for(; i < length; i++) { | |
| 4056 unsigned short c; | |
| 4057 // no embedded zeros | |
| 4058 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4059 if(buffer[i] < 128) { | |
| 4060 continue; | |
| 4061 } | |
| 4062 if ((i + 5) < length) { // see if it's legal supplementary character | |
| 4063 if (UTF8::is_supplementary_character(&buffer[i])) { | |
| 4064 c = UTF8::get_supplementary_character(&buffer[i]); | |
| 4065 i += 5; | |
| 4066 continue; | |
| 4067 } | |
| 4068 } | |
| 4069 switch (buffer[i] >> 4) { | |
| 4070 default: break; | |
| 4071 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
| 4072 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4073 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
| 4074 c = (buffer[i] & 0x1F) << 6; | |
| 4075 i++; | |
| 4076 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 4077 c += buffer[i] & 0x3F; | |
| 4078 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
| 4079 // for classes with major > 47, c must a null or a character in its shortest form | |
| 4080 break; | |
| 4081 } | |
| 4082 } | |
| 4083 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4084 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
| 4085 c = (buffer[i] & 0xF) << 12; | |
| 4086 i += 2; | |
| 4087 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 4088 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
| 4089 if (_major_version <= 47 || c >= 0x800) { | |
| 4090 // for classes with major > 47, c must be in its shortest form | |
| 4091 break; | |
| 4092 } | |
| 4093 } | |
| 4094 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4095 } // end of switch | |
| 4096 } // end of for | |
| 4097 } | |
| 4098 | |
| 4099 // Checks if name is a legal class name. | |
| 4100 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) { | |
| 4101 if (!_need_verify || _relax_verify) { return; } | |
| 4102 | |
| 4103 char buf[fixed_buffer_size]; | |
| 4104 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4105 unsigned int length = name->utf8_length(); | |
| 4106 bool legal = false; | |
| 4107 | |
| 4108 if (length > 0) { | |
| 4109 char* p; | |
| 4110 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
| 4111 p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 4112 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4113 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 4114 if (bytes[0] != '<') { | |
| 4115 p = skip_over_field_name(bytes, true, length); | |
| 4116 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4117 } | |
| 4118 } else { | |
| 4119 // 4900761: relax the constraints based on JSR202 spec | |
| 4120 // Class names may be drawn from the entire Unicode character set. | |
| 4121 // Identifiers between '/' must be unqualified names. | |
| 4122 // The utf8 string has been verified when parsing cpool entries. | |
| 4123 legal = verify_unqualified_name(bytes, length, LegalClass); | |
| 4124 } | |
| 4125 } | |
| 4126 if (!legal) { | |
| 4127 ResourceMark rm(THREAD); | |
| 4128 Exceptions::fthrow( | |
| 4129 THREAD_AND_LOCATION, | |
| 4130 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4131 "Illegal class name \"%s\" in class file %s", bytes, | |
| 4132 _class_name->as_C_string() | |
| 4133 ); | |
| 4134 return; | |
| 4135 } | |
| 4136 } | |
| 4137 | |
| 4138 // Checks if name is a legal field name. | |
| 4139 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) { | |
| 4140 if (!_need_verify || _relax_verify) { return; } | |
| 4141 | |
| 4142 char buf[fixed_buffer_size]; | |
| 4143 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4144 unsigned int length = name->utf8_length(); | |
| 4145 bool legal = false; | |
| 4146 | |
| 4147 if (length > 0) { | |
| 4148 if (_major_version < JAVA_1_5_VERSION) { | |
| 4149 if (bytes[0] != '<') { | |
| 4150 char* p = skip_over_field_name(bytes, false, length); | |
| 4151 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4152 } | |
| 4153 } else { | |
| 4154 // 4881221: relax the constraints based on JSR202 spec | |
| 4155 legal = verify_unqualified_name(bytes, length, LegalField); | |
| 4156 } | |
| 4157 } | |
| 4158 | |
| 4159 if (!legal) { | |
| 4160 ResourceMark rm(THREAD); | |
| 4161 Exceptions::fthrow( | |
| 4162 THREAD_AND_LOCATION, | |
| 4163 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4164 "Illegal field name \"%s\" in class %s", bytes, | |
| 4165 _class_name->as_C_string() | |
| 4166 ); | |
| 4167 return; | |
| 4168 } | |
| 4169 } | |
| 4170 | |
| 4171 // Checks if name is a legal method name. | |
| 4172 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) { | |
| 4173 if (!_need_verify || _relax_verify) { return; } | |
| 4174 | |
| 4175 assert(!name.is_null(), "method name is null"); | |
| 4176 char buf[fixed_buffer_size]; | |
| 4177 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4178 unsigned int length = name->utf8_length(); | |
| 4179 bool legal = false; | |
| 4180 | |
| 4181 if (length > 0) { | |
| 4182 if (bytes[0] == '<') { | |
| 4183 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
| 4184 legal = true; | |
| 4185 } | |
| 4186 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 4187 char* p; | |
| 4188 p = skip_over_field_name(bytes, false, length); | |
| 4189 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4190 } else { | |
| 4191 // 4881221: relax the constraints based on JSR202 spec | |
| 4192 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
| 4193 } | |
| 4194 } | |
| 4195 | |
| 4196 if (!legal) { | |
| 4197 ResourceMark rm(THREAD); | |
| 4198 Exceptions::fthrow( | |
| 4199 THREAD_AND_LOCATION, | |
| 4200 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4201 "Illegal method name \"%s\" in class %s", bytes, | |
| 4202 _class_name->as_C_string() | |
| 4203 ); | |
| 4204 return; | |
| 4205 } | |
| 4206 } | |
| 4207 | |
| 4208 | |
| 4209 // Checks if signature is a legal field signature. | |
| 4210 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
| 4211 if (!_need_verify) { return; } | |
| 4212 | |
| 4213 char buf[fixed_buffer_size]; | |
| 4214 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4215 unsigned int length = signature->utf8_length(); | |
| 4216 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 4217 | |
| 4218 if (p == NULL || (p - bytes) != (int)length) { | |
|
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|
4219 throwIllegalSignature("Field", name, signature, CHECK); |
| 0 | 4220 } |
| 4221 } | |
| 4222 | |
| 4223 // Checks if signature is a legal method signature. | |
| 4224 // Returns number of parameters | |
| 4225 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
| 4226 if (!_need_verify) { | |
| 4227 // make sure caller's args_size will be less than 0 even for non-static | |
| 4228 // method so it will be recomputed in compute_size_of_parameters(). | |
| 4229 return -2; | |
| 4230 } | |
| 4231 | |
| 4232 unsigned int args_size = 0; | |
| 4233 char buf[fixed_buffer_size]; | |
| 4234 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4235 unsigned int length = signature->utf8_length(); | |
| 4236 char* nextp; | |
| 4237 | |
| 4238 // The first character must be a '(' | |
| 4239 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
| 4240 length--; | |
| 4241 // Skip over legal field signatures | |
| 4242 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 4243 while ((length > 0) && (nextp != NULL)) { | |
| 4244 args_size++; | |
| 4245 if (p[0] == 'J' || p[0] == 'D') { | |
| 4246 args_size++; | |
| 4247 } | |
| 4248 length -= nextp - p; | |
| 4249 p = nextp; | |
| 4250 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 4251 } | |
| 4252 // The first non-signature thing better be a ')' | |
| 4253 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
| 4254 length--; | |
| 4255 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
| 4256 // All internal methods must return void | |
| 4257 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
| 4258 return args_size; | |
| 4259 } | |
| 4260 } else { | |
| 4261 // Now we better just have a return value | |
| 4262 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
| 4263 if (nextp && ((int)length == (nextp - p))) { | |
| 4264 return args_size; | |
| 4265 } | |
| 4266 } | |
| 4267 } | |
| 4268 } | |
| 4269 // Report error | |
|
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diff
changeset
|
4270 throwIllegalSignature("Method", name, signature, CHECK_0); |
| 0 | 4271 return 0; |
| 4272 } | |
| 4273 | |
| 4274 | |
| 4275 // Unqualified names may not contain the characters '.', ';', or '/'. | |
| 4276 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>. | |
| 4277 // Note that method names may not be <init> or <clinit> in this method. | |
| 4278 // Because these names have been checked as special cases before calling this method | |
| 4279 // in verify_legal_method_name. | |
| 4280 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) { | |
| 4281 jchar ch; | |
| 4282 | |
| 4283 for (char* p = name; p != name + length; ) { | |
| 4284 ch = *p; | |
| 4285 if (ch < 128) { | |
| 4286 p++; | |
| 4287 if (ch == '.' || ch == ';') { | |
| 4288 return false; // do not permit '.' or ';' | |
| 4289 } | |
| 4290 if (type != LegalClass && ch == '/') { | |
| 4291 return false; // do not permit '/' unless it's class name | |
| 4292 } | |
| 4293 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
| 4294 return false; // do not permit '<' or '>' in method names | |
| 4295 } | |
| 4296 } else { | |
| 4297 char* tmp_p = UTF8::next(p, &ch); | |
| 4298 p = tmp_p; | |
| 4299 } | |
| 4300 } | |
| 4301 return true; | |
| 4302 } | |
| 4303 | |
| 4304 | |
| 4305 // Take pointer to a string. Skip over the longest part of the string that could | |
| 4306 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
| 4307 // Return a pointer to just past the fieldname. | |
| 4308 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
| 4309 // being true, we saw consecutive slashes (meaning we were looking for a | |
| 4310 // qualified path but found something that was badly-formed). | |
| 4311 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
| 4312 char* p; | |
| 4313 jchar ch; | |
| 4314 jboolean last_is_slash = false; | |
| 4315 jboolean not_first_ch = false; | |
| 4316 | |
| 4317 for (p = name; p != name + length; not_first_ch = true) { | |
| 4318 char* old_p = p; | |
| 4319 ch = *p; | |
| 4320 if (ch < 128) { | |
| 4321 p++; | |
| 4322 // quick check for ascii | |
| 4323 if ((ch >= 'a' && ch <= 'z') || | |
| 4324 (ch >= 'A' && ch <= 'Z') || | |
| 4325 (ch == '_' || ch == '$') || | |
| 4326 (not_first_ch && ch >= '0' && ch <= '9')) { | |
| 4327 last_is_slash = false; | |
| 4328 continue; | |
| 4329 } | |
| 4330 if (slash_ok && ch == '/') { | |
| 4331 if (last_is_slash) { | |
| 4332 return NULL; // Don't permit consecutive slashes | |
| 4333 } | |
| 4334 last_is_slash = true; | |
| 4335 continue; | |
| 4336 } | |
| 4337 } else { | |
| 4338 jint unicode_ch; | |
| 4339 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
| 4340 p = tmp_p; | |
| 4341 last_is_slash = false; | |
| 4342 // Check if ch is Java identifier start or is Java identifier part | |
| 4343 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
| 4344 EXCEPTION_MARK; | |
| 1142 | 4345 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass()); |
| 0 | 4346 |
| 4347 // return value | |
| 4348 JavaValue result(T_BOOLEAN); | |
| 4349 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
| 4350 JavaCallArguments args; | |
| 4351 args.push_int(unicode_ch); | |
| 4352 | |
| 4353 // public static boolean isJavaIdentifierStart(char ch); | |
| 4354 JavaCalls::call_static(&result, | |
| 4355 klass, | |
| 4356 vmSymbolHandles::isJavaIdentifierStart_name(), | |
| 4357 vmSymbolHandles::int_bool_signature(), | |
| 4358 &args, | |
| 4359 THREAD); | |
| 4360 | |
| 4361 if (HAS_PENDING_EXCEPTION) { | |
| 4362 CLEAR_PENDING_EXCEPTION; | |
| 4363 return 0; | |
| 4364 } | |
| 4365 if (result.get_jboolean()) { | |
| 4366 continue; | |
| 4367 } | |
| 4368 | |
| 4369 if (not_first_ch) { | |
| 4370 // public static boolean isJavaIdentifierPart(char ch); | |
| 4371 JavaCalls::call_static(&result, | |
| 4372 klass, | |
| 4373 vmSymbolHandles::isJavaIdentifierPart_name(), | |
| 4374 vmSymbolHandles::int_bool_signature(), | |
| 4375 &args, | |
| 4376 THREAD); | |
| 4377 | |
| 4378 if (HAS_PENDING_EXCEPTION) { | |
| 4379 CLEAR_PENDING_EXCEPTION; | |
| 4380 return 0; | |
| 4381 } | |
| 4382 | |
| 4383 if (result.get_jboolean()) { | |
| 4384 continue; | |
| 4385 } | |
| 4386 } | |
| 4387 } | |
| 4388 return (not_first_ch) ? old_p : NULL; | |
| 4389 } | |
| 4390 return (not_first_ch) ? p : NULL; | |
| 4391 } | |
| 4392 | |
| 4393 | |
| 4394 // Take pointer to a string. Skip over the longest part of the string that could | |
| 4395 // be taken as a field signature. Allow "void" if void_ok. | |
| 4396 // Return a pointer to just past the signature. | |
| 4397 // Return NULL if no legal signature is found. | |
| 4398 char* ClassFileParser::skip_over_field_signature(char* signature, | |
| 4399 bool void_ok, | |
| 4400 unsigned int length, | |
| 4401 TRAPS) { | |
| 4402 unsigned int array_dim = 0; | |
| 4403 while (length > 0) { | |
| 4404 switch (signature[0]) { | |
| 4405 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
| 4406 case JVM_SIGNATURE_BOOLEAN: | |
| 4407 case JVM_SIGNATURE_BYTE: | |
| 4408 case JVM_SIGNATURE_CHAR: | |
| 4409 case JVM_SIGNATURE_SHORT: | |
| 4410 case JVM_SIGNATURE_INT: | |
| 4411 case JVM_SIGNATURE_FLOAT: | |
| 4412 case JVM_SIGNATURE_LONG: | |
| 4413 case JVM_SIGNATURE_DOUBLE: | |
| 4414 return signature + 1; | |
| 4415 case JVM_SIGNATURE_CLASS: { | |
| 4416 if (_major_version < JAVA_1_5_VERSION) { | |
| 4417 // Skip over the class name if one is there | |
| 4418 char* p = skip_over_field_name(signature + 1, true, --length); | |
| 4419 | |
| 4420 // The next character better be a semicolon | |
| 4421 if (p && (p - signature) > 1 && p[0] == ';') { | |
| 4422 return p + 1; | |
| 4423 } | |
| 4424 } else { | |
| 4425 // 4900761: For class version > 48, any unicode is allowed in class name. | |
| 4426 length--; | |
| 4427 signature++; | |
| 4428 while (length > 0 && signature[0] != ';') { | |
| 4429 if (signature[0] == '.') { | |
| 4430 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
| 4431 } | |
| 4432 length--; | |
| 4433 signature++; | |
| 4434 } | |
| 4435 if (signature[0] == ';') { return signature + 1; } | |
| 4436 } | |
| 4437 | |
| 4438 return NULL; | |
| 4439 } | |
| 4440 case JVM_SIGNATURE_ARRAY: | |
| 4441 array_dim++; | |
| 4442 if (array_dim > 255) { | |
| 4443 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
| 4444 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
| 4445 } | |
| 4446 // The rest of what's there better be a legal signature | |
| 4447 signature++; | |
| 4448 length--; | |
| 4449 void_ok = false; | |
| 4450 break; | |
| 4451 | |
| 4452 default: | |
| 4453 return NULL; | |
| 4454 } | |
| 4455 } | |
| 4456 return NULL; | |
| 4457 } |