Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.cpp @ 856:75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
Summary: remove useless lazy evaluation of intrinsics; add LAST_COMPILER_INLINE to help categorize them
Reviewed-by: kvn
| author | jrose |
|---|---|
| date | Tue, 21 Jul 2009 16:56:06 -0700 |
| parents | e5b0439ef4ae |
| children | 494244ae0171 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 579 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_classFileParser.cpp.incl" | |
| 27 | |
| 28 // We generally try to create the oops directly when parsing, rather than allocating | |
| 29 // temporary data structures and copying the bytes twice. A temporary area is only | |
| 30 // needed when parsing utf8 entries in the constant pool and when parsing line number | |
| 31 // tables. | |
| 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 | |
| 50 | |
| 51 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) { | |
| 52 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize | |
| 53 // this function (_current can be allocated in a register, with scalar | |
| 54 // replacement of aggregates). The _current pointer is copied back to | |
| 55 // stream() when this function returns. DON'T call another method within | |
| 56 // this method that uses stream(). | |
| 57 ClassFileStream* cfs0 = stream(); | |
| 58 ClassFileStream cfs1 = *cfs0; | |
| 59 ClassFileStream* cfs = &cfs1; | |
| 60 #ifdef ASSERT | |
| 61 u1* old_current = cfs0->current(); | |
| 62 #endif | |
| 63 | |
| 64 // Used for batching symbol allocations. | |
| 65 const char* names[SymbolTable::symbol_alloc_batch_size]; | |
| 66 int lengths[SymbolTable::symbol_alloc_batch_size]; | |
| 67 int indices[SymbolTable::symbol_alloc_batch_size]; | |
| 68 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; | |
| 69 int names_count = 0; | |
| 70 | |
| 71 // parsing Index 0 is unused | |
| 72 for (int index = 1; index < length; index++) { | |
| 73 // Each of the following case guarantees one more byte in the stream | |
| 74 // for the following tag or the access_flags following constant pool, | |
| 75 // so we don't need bounds-check for reading tag. | |
| 76 u1 tag = cfs->get_u1_fast(); | |
| 77 switch (tag) { | |
| 78 case JVM_CONSTANT_Class : | |
| 79 { | |
| 80 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags | |
| 81 u2 name_index = cfs->get_u2_fast(); | |
| 82 cp->klass_index_at_put(index, name_index); | |
| 83 } | |
| 84 break; | |
| 85 case JVM_CONSTANT_Fieldref : | |
| 86 { | |
| 87 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 88 u2 class_index = cfs->get_u2_fast(); | |
| 89 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 90 cp->field_at_put(index, class_index, name_and_type_index); | |
| 91 } | |
| 92 break; | |
| 93 case JVM_CONSTANT_Methodref : | |
| 94 { | |
| 95 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 96 u2 class_index = cfs->get_u2_fast(); | |
| 97 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 98 cp->method_at_put(index, class_index, name_and_type_index); | |
| 99 } | |
| 100 break; | |
| 101 case JVM_CONSTANT_InterfaceMethodref : | |
| 102 { | |
| 103 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 104 u2 class_index = cfs->get_u2_fast(); | |
| 105 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 106 cp->interface_method_at_put(index, class_index, name_and_type_index); | |
| 107 } | |
| 108 break; | |
| 109 case JVM_CONSTANT_String : | |
| 110 { | |
| 111 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags | |
| 112 u2 string_index = cfs->get_u2_fast(); | |
| 113 cp->string_index_at_put(index, string_index); | |
| 114 } | |
| 115 break; | |
| 116 case JVM_CONSTANT_Integer : | |
| 117 { | |
| 118 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 119 u4 bytes = cfs->get_u4_fast(); | |
| 120 cp->int_at_put(index, (jint) bytes); | |
| 121 } | |
| 122 break; | |
| 123 case JVM_CONSTANT_Float : | |
| 124 { | |
| 125 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 126 u4 bytes = cfs->get_u4_fast(); | |
| 127 cp->float_at_put(index, *(jfloat*)&bytes); | |
| 128 } | |
| 129 break; | |
| 130 case JVM_CONSTANT_Long : | |
| 131 // A mangled type might cause you to overrun allocated memory | |
| 132 guarantee_property(index+1 < length, | |
| 133 "Invalid constant pool entry %u in class file %s", | |
| 134 index, CHECK); | |
| 135 { | |
| 136 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 137 u8 bytes = cfs->get_u8_fast(); | |
| 138 cp->long_at_put(index, bytes); | |
| 139 } | |
| 140 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 141 break; | |
| 142 case JVM_CONSTANT_Double : | |
| 143 // A mangled type might cause you to overrun allocated memory | |
| 144 guarantee_property(index+1 < length, | |
| 145 "Invalid constant pool entry %u in class file %s", | |
| 146 index, CHECK); | |
| 147 { | |
| 148 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 149 u8 bytes = cfs->get_u8_fast(); | |
| 150 cp->double_at_put(index, *(jdouble*)&bytes); | |
| 151 } | |
| 152 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 153 break; | |
| 154 case JVM_CONSTANT_NameAndType : | |
| 155 { | |
| 156 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags | |
| 157 u2 name_index = cfs->get_u2_fast(); | |
| 158 u2 signature_index = cfs->get_u2_fast(); | |
| 159 cp->name_and_type_at_put(index, name_index, signature_index); | |
| 160 } | |
| 161 break; | |
| 162 case JVM_CONSTANT_Utf8 : | |
| 163 { | |
| 164 cfs->guarantee_more(2, CHECK); // utf8_length | |
| 165 u2 utf8_length = cfs->get_u2_fast(); | |
| 166 u1* utf8_buffer = cfs->get_u1_buffer(); | |
| 167 assert(utf8_buffer != NULL, "null utf8 buffer"); | |
| 168 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. | |
| 169 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags | |
| 170 cfs->skip_u1_fast(utf8_length); | |
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171 |
| 0 | 172 // Before storing the symbol, make sure it's legal |
| 173 if (_need_verify) { | |
| 174 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); | |
| 175 } | |
| 176 | |
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177 if (AnonymousClasses && has_cp_patch_at(index)) { |
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178 Handle patch = clear_cp_patch_at(index); |
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179 guarantee_property(java_lang_String::is_instance(patch()), |
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180 "Illegal utf8 patch at %d in class file %s", |
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181 index, CHECK); |
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182 char* str = java_lang_String::as_utf8_string(patch()); |
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183 // (could use java_lang_String::as_symbol instead, but might as well batch them) |
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184 utf8_buffer = (u1*) str; |
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185 utf8_length = (int) strlen(str); |
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186 } |
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187 |
| 0 | 188 unsigned int hash; |
| 189 symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); | |
| 190 if (result == NULL) { | |
| 191 names[names_count] = (char*)utf8_buffer; | |
| 192 lengths[names_count] = utf8_length; | |
| 193 indices[names_count] = index; | |
| 194 hashValues[names_count++] = hash; | |
| 195 if (names_count == SymbolTable::symbol_alloc_batch_size) { | |
| 196 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
| 197 names_count = 0; | |
| 198 } | |
| 199 } else { | |
| 200 cp->symbol_at_put(index, result); | |
| 201 } | |
| 202 } | |
| 203 break; | |
| 204 default: | |
| 205 classfile_parse_error( | |
| 206 "Unknown constant tag %u in class file %s", tag, CHECK); | |
| 207 break; | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 // Allocate the remaining symbols | |
| 212 if (names_count > 0) { | |
| 213 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
| 214 } | |
| 215 | |
| 216 // Copy _current pointer of local copy back to stream(). | |
| 217 #ifdef ASSERT | |
| 218 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); | |
| 219 #endif | |
| 220 cfs0->set_current(cfs1.current()); | |
| 221 } | |
| 222 | |
| 223 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } | |
| 224 | |
| 225 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { | |
| 226 ClassFileStream* cfs = stream(); | |
| 227 constantPoolHandle nullHandle; | |
| 228 | |
| 229 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag | |
| 230 u2 length = cfs->get_u2_fast(); | |
| 231 guarantee_property( | |
| 232 length >= 1, "Illegal constant pool size %u in class file %s", | |
| 233 length, CHECK_(nullHandle)); | |
| 234 constantPoolOop constant_pool = | |
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235 oopFactory::new_constantPool(length, |
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236 methodOopDesc::IsSafeConc, |
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237 CHECK_(nullHandle)); |
| 0 | 238 constantPoolHandle cp (THREAD, constant_pool); |
| 239 | |
| 240 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
| 241 | |
| 242 // parsing constant pool entries | |
| 243 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
| 244 | |
| 245 int index = 1; // declared outside of loops for portability | |
| 246 | |
| 247 // first verification pass - validate cross references and fixup class and string constants | |
| 248 for (index = 1; index < length; index++) { // Index 0 is unused | |
| 249 switch (cp->tag_at(index).value()) { | |
| 250 case JVM_CONSTANT_Class : | |
| 251 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 252 break; | |
| 253 case JVM_CONSTANT_Fieldref : | |
| 254 // fall through | |
| 255 case JVM_CONSTANT_Methodref : | |
| 256 // fall through | |
| 257 case JVM_CONSTANT_InterfaceMethodref : { | |
| 258 if (!_need_verify) break; | |
| 259 int klass_ref_index = cp->klass_ref_index_at(index); | |
| 260 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 261 check_property(valid_cp_range(klass_ref_index, length) && | |
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262 is_klass_reference(cp, klass_ref_index), |
| 0 | 263 "Invalid constant pool index %u in class file %s", |
| 264 klass_ref_index, | |
| 265 CHECK_(nullHandle)); | |
| 266 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
| 267 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
| 268 "Invalid constant pool index %u in class file %s", | |
| 269 name_and_type_ref_index, | |
| 270 CHECK_(nullHandle)); | |
| 271 break; | |
| 272 } | |
| 273 case JVM_CONSTANT_String : | |
| 274 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 275 break; | |
| 276 case JVM_CONSTANT_Integer : | |
| 277 break; | |
| 278 case JVM_CONSTANT_Float : | |
| 279 break; | |
| 280 case JVM_CONSTANT_Long : | |
| 281 case JVM_CONSTANT_Double : | |
| 282 index++; | |
| 283 check_property( | |
| 284 (index < length && cp->tag_at(index).is_invalid()), | |
| 285 "Improper constant pool long/double index %u in class file %s", | |
| 286 index, CHECK_(nullHandle)); | |
| 287 break; | |
| 288 case JVM_CONSTANT_NameAndType : { | |
| 289 if (!_need_verify) break; | |
| 290 int name_ref_index = cp->name_ref_index_at(index); | |
| 291 int signature_ref_index = cp->signature_ref_index_at(index); | |
| 292 check_property( | |
| 293 valid_cp_range(name_ref_index, length) && | |
| 294 cp->tag_at(name_ref_index).is_utf8(), | |
| 295 "Invalid constant pool index %u in class file %s", | |
| 296 name_ref_index, CHECK_(nullHandle)); | |
| 297 check_property( | |
| 298 valid_cp_range(signature_ref_index, length) && | |
| 299 cp->tag_at(signature_ref_index).is_utf8(), | |
| 300 "Invalid constant pool index %u in class file %s", | |
| 301 signature_ref_index, CHECK_(nullHandle)); | |
| 302 break; | |
| 303 } | |
| 304 case JVM_CONSTANT_Utf8 : | |
| 305 break; | |
| 306 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
| 307 case JVM_CONSTANT_UnresolvedClassInError: | |
| 308 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 309 break; | |
| 310 case JVM_CONSTANT_ClassIndex : | |
| 311 { | |
| 312 int class_index = cp->klass_index_at(index); | |
| 313 check_property( | |
| 314 valid_cp_range(class_index, length) && | |
| 315 cp->tag_at(class_index).is_utf8(), | |
| 316 "Invalid constant pool index %u in class file %s", | |
| 317 class_index, CHECK_(nullHandle)); | |
| 318 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
| 319 } | |
| 320 break; | |
| 321 case JVM_CONSTANT_UnresolvedString : | |
| 322 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 323 break; | |
| 324 case JVM_CONSTANT_StringIndex : | |
| 325 { | |
| 326 int string_index = cp->string_index_at(index); | |
| 327 check_property( | |
| 328 valid_cp_range(string_index, length) && | |
| 329 cp->tag_at(string_index).is_utf8(), | |
| 330 "Invalid constant pool index %u in class file %s", | |
| 331 string_index, CHECK_(nullHandle)); | |
| 332 symbolOop sym = cp->symbol_at(string_index); | |
| 333 cp->unresolved_string_at_put(index, sym); | |
| 334 } | |
| 335 break; | |
| 336 default: | |
| 337 fatal1("bad constant pool tag value %u", cp->tag_at(index).value()); | |
| 338 ShouldNotReachHere(); | |
| 339 break; | |
| 340 } // end of switch | |
| 341 } // end of for | |
| 342 | |
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343 if (_cp_patches != NULL) { |
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344 // need to treat this_class specially... |
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345 assert(AnonymousClasses, ""); |
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346 int this_class_index; |
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347 { |
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348 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len |
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349 u1* mark = cfs->current(); |
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350 u2 flags = cfs->get_u2_fast(); |
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351 this_class_index = cfs->get_u2_fast(); |
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352 cfs->set_current(mark); // revert to mark |
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353 } |
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354 |
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355 for (index = 1; index < length; index++) { // Index 0 is unused |
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356 if (has_cp_patch_at(index)) { |
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357 guarantee_property(index != this_class_index, |
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358 "Illegal constant pool patch to self at %d in class file %s", |
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359 index, CHECK_(nullHandle)); |
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360 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle)); |
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361 } |
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362 } |
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363 // Ensure that all the patches have been used. |
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364 for (index = 0; index < _cp_patches->length(); index++) { |
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365 guarantee_property(!has_cp_patch_at(index), |
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366 "Unused constant pool patch at %d in class file %s", |
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367 index, CHECK_(nullHandle)); |
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368 } |
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369 } |
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370 |
| 0 | 371 if (!_need_verify) { |
| 372 return cp; | |
| 373 } | |
| 374 | |
| 375 // second verification pass - checks the strings are of the right format. | |
|
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376 // but not yet to the other entries |
| 0 | 377 for (index = 1; index < length; index++) { |
| 378 jbyte tag = cp->tag_at(index).value(); | |
| 379 switch (tag) { | |
| 380 case JVM_CONSTANT_UnresolvedClass: { | |
| 381 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index)); | |
|
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382 // check the name, even if _cp_patches will overwrite it |
| 0 | 383 verify_legal_class_name(class_name, CHECK_(nullHandle)); |
| 384 break; | |
| 385 } | |
| 386 case JVM_CONSTANT_Fieldref: | |
| 387 case JVM_CONSTANT_Methodref: | |
| 388 case JVM_CONSTANT_InterfaceMethodref: { | |
| 389 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 390 // already verified to be utf8 | |
| 391 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
| 392 // already verified to be utf8 | |
| 393 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
| 394 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
| 395 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index)); | |
| 396 if (tag == JVM_CONSTANT_Fieldref) { | |
| 397 verify_legal_field_name(name, CHECK_(nullHandle)); | |
| 398 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); | |
| 399 } else { | |
| 400 verify_legal_method_name(name, CHECK_(nullHandle)); | |
| 401 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 402 if (tag == JVM_CONSTANT_Methodref) { | |
| 403 // 4509014: If a class method name begins with '<', it must be "<init>". | |
| 404 assert(!name.is_null(), "method name in constant pool is null"); | |
| 405 unsigned int name_len = name->utf8_length(); | |
| 406 assert(name_len > 0, "bad method name"); // already verified as legal name | |
| 407 if (name->byte_at(0) == '<') { | |
| 408 if (name() != vmSymbols::object_initializer_name()) { | |
| 409 classfile_parse_error( | |
| 410 "Bad method name at constant pool index %u in class file %s", | |
| 411 name_ref_index, CHECK_(nullHandle)); | |
| 412 } | |
| 413 } | |
| 414 } | |
| 415 } | |
| 416 break; | |
| 417 } | |
| 418 } // end of switch | |
| 419 } // end of for | |
| 420 | |
| 421 return cp; | |
| 422 } | |
| 423 | |
| 424 | |
|
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425 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) { |
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426 assert(AnonymousClasses, ""); |
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427 BasicType patch_type = T_VOID; |
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428 switch (cp->tag_at(index).value()) { |
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429 |
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430 case JVM_CONSTANT_UnresolvedClass : |
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431 // Patching a class means pre-resolving it. |
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432 // The name in the constant pool is ignored. |
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433 if (patch->klass() == SystemDictionary::class_klass()) { // %%% java_lang_Class::is_instance |
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434 guarantee_property(!java_lang_Class::is_primitive(patch()), |
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435 "Illegal class patch at %d in class file %s", |
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436 index, CHECK); |
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437 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch())); |
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438 } else { |
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439 guarantee_property(java_lang_String::is_instance(patch()), |
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440 "Illegal class patch at %d in class file %s", |
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441 index, CHECK); |
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442 symbolHandle name = java_lang_String::as_symbol(patch(), CHECK); |
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443 cp->unresolved_klass_at_put(index, name()); |
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444 } |
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445 break; |
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446 |
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447 case JVM_CONSTANT_UnresolvedString : |
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448 // Patching a string means pre-resolving it. |
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449 // The spelling in the constant pool is ignored. |
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450 // The constant reference may be any object whatever. |
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451 // If it is not a real interned string, the constant is referred |
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452 // to as a "pseudo-string", and must be presented to the CP |
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453 // explicitly, because it may require scavenging. |
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454 cp->pseudo_string_at_put(index, patch()); |
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455 break; |
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456 |
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457 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim; |
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458 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim; |
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459 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim; |
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460 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim; |
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461 patch_prim: |
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462 { |
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463 jvalue value; |
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464 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); |
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465 guarantee_property(value_type == patch_type, |
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466 "Illegal primitive patch at %d in class file %s", |
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467 index, CHECK); |
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468 switch (value_type) { |
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469 case T_INT: cp->int_at_put(index, value.i); break; |
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470 case T_FLOAT: cp->float_at_put(index, value.f); break; |
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471 case T_LONG: cp->long_at_put(index, value.j); break; |
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472 case T_DOUBLE: cp->double_at_put(index, value.d); break; |
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473 default: assert(false, ""); |
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474 } |
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475 } |
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476 break; |
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477 |
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478 default: |
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479 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. |
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480 guarantee_property(!has_cp_patch_at(index), |
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481 "Illegal unexpected patch at %d in class file %s", |
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482 index, CHECK); |
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483 return; |
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484 } |
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485 |
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486 // On fall-through, mark the patch as used. |
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487 clear_cp_patch_at(index); |
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488 } |
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489 |
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490 |
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491 |
| 0 | 492 class NameSigHash: public ResourceObj { |
| 493 public: | |
| 494 symbolOop _name; // name | |
| 495 symbolOop _sig; // signature | |
| 496 NameSigHash* _next; // Next entry in hash table | |
| 497 }; | |
| 498 | |
| 499 | |
| 500 #define HASH_ROW_SIZE 256 | |
| 501 | |
| 502 unsigned int hash(symbolOop name, symbolOop sig) { | |
| 503 unsigned int raw_hash = 0; | |
| 504 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
| 505 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
| 506 | |
| 507 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
| 508 } | |
| 509 | |
| 510 | |
| 511 void initialize_hashtable(NameSigHash** table) { | |
| 512 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
| 513 } | |
| 514 | |
| 515 // Return false if the name/sig combination is found in table. | |
| 516 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
| 517 // The old format checker uses heap sort to find duplicates. | |
| 518 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
| 519 // of table since we don't expect symbolOop's to move. | |
| 520 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) { | |
| 521 assert(name != NULL, "name in constant pool is NULL"); | |
| 522 | |
| 523 // First lookup for duplicates | |
| 524 int index = hash(name, sig); | |
| 525 NameSigHash* entry = table[index]; | |
| 526 while (entry != NULL) { | |
| 527 if (entry->_name == name && entry->_sig == sig) { | |
| 528 return false; | |
| 529 } | |
| 530 entry = entry->_next; | |
| 531 } | |
| 532 | |
| 533 // No duplicate is found, allocate a new entry and fill it. | |
| 534 entry = new NameSigHash(); | |
| 535 entry->_name = name; | |
| 536 entry->_sig = sig; | |
| 537 | |
| 538 // Insert into hash table | |
| 539 entry->_next = table[index]; | |
| 540 table[index] = entry; | |
| 541 | |
| 542 return true; | |
| 543 } | |
| 544 | |
| 545 | |
| 546 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
| 547 int length, | |
| 548 Handle class_loader, | |
| 549 Handle protection_domain, | |
| 550 PerfTraceTime* vmtimer, | |
| 551 symbolHandle class_name, | |
| 552 TRAPS) { | |
| 553 ClassFileStream* cfs = stream(); | |
| 554 assert(length > 0, "only called for length>0"); | |
| 555 objArrayHandle nullHandle; | |
| 556 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 557 objArrayHandle interfaces (THREAD, interface_oop); | |
| 558 | |
| 559 int index; | |
| 560 for (index = 0; index < length; index++) { | |
| 561 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
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562 KlassHandle interf; |
| 0 | 563 check_property( |
| 564 valid_cp_range(interface_index, cp->length()) && | |
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565 is_klass_reference(cp, interface_index), |
| 0 | 566 "Interface name has bad constant pool index %u in class file %s", |
| 567 interface_index, CHECK_(nullHandle)); | |
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568 if (cp->tag_at(interface_index).is_klass()) { |
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569 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); |
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570 } else { |
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571 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index)); |
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572 |
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573 // Don't need to check legal name because it's checked when parsing constant pool. |
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574 // But need to make sure it's not an array type. |
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575 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, |
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576 "Bad interface name in class file %s", CHECK_(nullHandle)); |
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577 |
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578 vmtimer->suspend(); // do not count recursive loading twice |
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579 // Call resolve_super so classcircularity is checked |
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580 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, |
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581 unresolved_klass, class_loader, protection_domain, |
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582 false, CHECK_(nullHandle)); |
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583 interf = KlassHandle(THREAD, k); |
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584 vmtimer->resume(); |
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585 |
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586 if (LinkWellKnownClasses) // my super type is well known to me |
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587 cp->klass_at_put(interface_index, interf()); // eagerly resolve |
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588 } |
| 0 | 589 |
| 590 if (!Klass::cast(interf())->is_interface()) { | |
| 591 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
| 592 } | |
| 593 interfaces->obj_at_put(index, interf()); | |
| 594 } | |
| 595 | |
| 596 if (!_need_verify || length <= 1) { | |
| 597 return interfaces; | |
| 598 } | |
| 599 | |
| 600 // Check if there's any duplicates in interfaces | |
| 601 ResourceMark rm(THREAD); | |
| 602 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 603 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 604 initialize_hashtable(interface_names); | |
| 605 bool dup = false; | |
| 606 { | |
| 607 debug_only(No_Safepoint_Verifier nsv;) | |
| 608 for (index = 0; index < length; index++) { | |
| 609 klassOop k = (klassOop)interfaces->obj_at(index); | |
| 610 symbolOop name = instanceKlass::cast(k)->name(); | |
| 611 // If no duplicates, add (name, NULL) in hashtable interface_names. | |
| 612 if (!put_after_lookup(name, NULL, interface_names)) { | |
| 613 dup = true; | |
| 614 break; | |
| 615 } | |
| 616 } | |
| 617 } | |
| 618 if (dup) { | |
| 619 classfile_parse_error("Duplicate interface name in class file %s", | |
| 620 CHECK_(nullHandle)); | |
| 621 } | |
| 622 | |
| 623 return interfaces; | |
| 624 } | |
| 625 | |
| 626 | |
| 627 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
| 628 // Make sure the constant pool entry is of a type appropriate to this field | |
| 629 guarantee_property( | |
| 630 (constantvalue_index > 0 && | |
| 631 constantvalue_index < cp->length()), | |
| 632 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
| 633 constantvalue_index, CHECK); | |
| 634 constantTag value_type = cp->tag_at(constantvalue_index); | |
| 635 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
| 636 case T_LONG: | |
| 637 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
| 638 break; | |
| 639 case T_FLOAT: | |
| 640 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
| 641 break; | |
| 642 case T_DOUBLE: | |
| 643 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
| 644 break; | |
| 645 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
| 646 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
| 647 break; | |
| 648 case T_OBJECT: | |
| 649 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;", 18) | |
| 650 && (value_type.is_string() || value_type.is_unresolved_string())), | |
| 651 "Bad string initial value in class file %s", CHECK); | |
| 652 break; | |
| 653 default: | |
| 654 classfile_parse_error( | |
| 655 "Unable to set initial value %u in class file %s", | |
| 656 constantvalue_index, CHECK); | |
| 657 } | |
| 658 } | |
| 659 | |
| 660 | |
| 661 // Parse attributes for a field. | |
| 662 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
| 663 u2 attributes_count, | |
| 664 bool is_static, u2 signature_index, | |
| 665 u2* constantvalue_index_addr, | |
| 666 bool* is_synthetic_addr, | |
| 667 u2* generic_signature_index_addr, | |
| 668 typeArrayHandle* field_annotations, | |
| 669 TRAPS) { | |
| 670 ClassFileStream* cfs = stream(); | |
| 671 assert(attributes_count > 0, "length should be greater than 0"); | |
| 672 u2 constantvalue_index = 0; | |
| 673 u2 generic_signature_index = 0; | |
| 674 bool is_synthetic = false; | |
| 675 u1* runtime_visible_annotations = NULL; | |
| 676 int runtime_visible_annotations_length = 0; | |
| 677 u1* runtime_invisible_annotations = NULL; | |
| 678 int runtime_invisible_annotations_length = 0; | |
| 679 while (attributes_count--) { | |
| 680 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 681 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 682 u4 attribute_length = cfs->get_u4_fast(); | |
| 683 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
| 684 cp->tag_at(attribute_name_index).is_utf8(), | |
| 685 "Invalid field attribute index %u in class file %s", | |
| 686 attribute_name_index, | |
| 687 CHECK); | |
| 688 symbolOop attribute_name = cp->symbol_at(attribute_name_index); | |
| 689 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { | |
| 690 // ignore if non-static | |
| 691 if (constantvalue_index != 0) { | |
| 692 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
| 693 } | |
| 694 check_property( | |
| 695 attribute_length == 2, | |
| 696 "Invalid ConstantValue field attribute length %u in class file %s", | |
| 697 attribute_length, CHECK); | |
| 698 constantvalue_index = cfs->get_u2(CHECK); | |
| 699 if (_need_verify) { | |
| 700 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
| 701 } | |
| 702 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
| 703 if (attribute_length != 0) { | |
| 704 classfile_parse_error( | |
| 705 "Invalid Synthetic field attribute length %u in class file %s", | |
| 706 attribute_length, CHECK); | |
| 707 } | |
| 708 is_synthetic = true; | |
| 709 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 710 if (attribute_length != 0) { | |
| 711 classfile_parse_error( | |
| 712 "Invalid Deprecated field attribute length %u in class file %s", | |
| 713 attribute_length, CHECK); | |
| 714 } | |
| 715 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 716 if (attribute_name == vmSymbols::tag_signature()) { | |
| 717 if (attribute_length != 2) { | |
| 718 classfile_parse_error( | |
| 719 "Wrong size %u for field's Signature attribute in class file %s", | |
| 720 attribute_length, CHECK); | |
| 721 } | |
| 722 generic_signature_index = cfs->get_u2(CHECK); | |
| 723 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 724 runtime_visible_annotations_length = attribute_length; | |
| 725 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 726 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 727 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 728 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 729 runtime_invisible_annotations_length = attribute_length; | |
| 730 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 731 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 732 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 733 } else { | |
| 734 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 735 } | |
| 736 } else { | |
| 737 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 738 } | |
| 739 } | |
| 740 | |
| 741 *constantvalue_index_addr = constantvalue_index; | |
| 742 *is_synthetic_addr = is_synthetic; | |
| 743 *generic_signature_index_addr = generic_signature_index; | |
| 744 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
| 745 runtime_visible_annotations_length, | |
| 746 runtime_invisible_annotations, | |
| 747 runtime_invisible_annotations_length, | |
| 748 CHECK); | |
| 749 return; | |
| 750 } | |
| 751 | |
| 752 | |
| 753 // Field allocation types. Used for computing field offsets. | |
| 754 | |
| 755 enum FieldAllocationType { | |
| 756 STATIC_OOP, // Oops | |
| 757 STATIC_BYTE, // Boolean, Byte, char | |
| 758 STATIC_SHORT, // shorts | |
| 759 STATIC_WORD, // ints | |
| 760 STATIC_DOUBLE, // long or double | |
| 761 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
| 762 NONSTATIC_OOP, | |
| 763 NONSTATIC_BYTE, | |
| 764 NONSTATIC_SHORT, | |
| 765 NONSTATIC_WORD, | |
| 766 NONSTATIC_DOUBLE, | |
| 767 NONSTATIC_ALIGNED_DOUBLE | |
| 768 }; | |
| 769 | |
| 770 | |
| 771 struct FieldAllocationCount { | |
| 772 int static_oop_count; | |
| 773 int static_byte_count; | |
| 774 int static_short_count; | |
| 775 int static_word_count; | |
| 776 int static_double_count; | |
| 777 int nonstatic_oop_count; | |
| 778 int nonstatic_byte_count; | |
| 779 int nonstatic_short_count; | |
| 780 int nonstatic_word_count; | |
| 781 int nonstatic_double_count; | |
| 782 }; | |
| 783 | |
| 784 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
| 785 struct FieldAllocationCount *fac, | |
| 786 objArrayHandle* fields_annotations, TRAPS) { | |
| 787 ClassFileStream* cfs = stream(); | |
| 788 typeArrayHandle nullHandle; | |
| 789 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 790 u2 length = cfs->get_u2_fast(); | |
| 791 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
| 792 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
| 793 typeArrayHandle fields(THREAD, new_fields); | |
| 794 | |
| 795 int index = 0; | |
| 796 typeArrayHandle field_annotations; | |
| 797 for (int n = 0; n < length; n++) { | |
| 798 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 799 | |
| 800 AccessFlags access_flags; | |
| 801 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
| 802 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
| 803 access_flags.set_flags(flags); | |
| 804 | |
| 805 u2 name_index = cfs->get_u2_fast(); | |
| 806 int cp_size = cp->length(); | |
| 807 check_property( | |
| 808 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
| 809 "Invalid constant pool index %u for field name in class file %s", | |
| 810 name_index, CHECK_(nullHandle)); | |
| 811 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 812 verify_legal_field_name(name, CHECK_(nullHandle)); | |
| 813 | |
| 814 u2 signature_index = cfs->get_u2_fast(); | |
| 815 check_property( | |
| 816 valid_cp_range(signature_index, cp_size) && | |
| 817 cp->tag_at(signature_index).is_utf8(), | |
| 818 "Invalid constant pool index %u for field signature in class file %s", | |
| 819 signature_index, CHECK_(nullHandle)); | |
| 820 symbolHandle sig(THREAD, cp->symbol_at(signature_index)); | |
| 821 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); | |
| 822 | |
| 823 u2 constantvalue_index = 0; | |
| 824 bool is_synthetic = false; | |
| 825 u2 generic_signature_index = 0; | |
| 826 bool is_static = access_flags.is_static(); | |
| 827 | |
| 828 u2 attributes_count = cfs->get_u2_fast(); | |
| 829 if (attributes_count > 0) { | |
| 830 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
| 831 &constantvalue_index, &is_synthetic, | |
| 832 &generic_signature_index, &field_annotations, | |
| 833 CHECK_(nullHandle)); | |
| 834 if (field_annotations.not_null()) { | |
| 835 if (fields_annotations->is_null()) { | |
| 836 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 837 *fields_annotations = objArrayHandle(THREAD, md); | |
| 838 } | |
| 839 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
| 840 } | |
| 841 if (is_synthetic) { | |
| 842 access_flags.set_is_synthetic(); | |
| 843 } | |
| 844 } | |
| 845 | |
| 846 fields->short_at_put(index++, access_flags.as_short()); | |
| 847 fields->short_at_put(index++, name_index); | |
| 848 fields->short_at_put(index++, signature_index); | |
| 849 fields->short_at_put(index++, constantvalue_index); | |
| 850 | |
| 851 // Remember how many oops we encountered and compute allocation type | |
| 852 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
| 853 FieldAllocationType atype; | |
| 854 if ( is_static ) { | |
| 855 switch ( type ) { | |
| 856 case T_BOOLEAN: | |
| 857 case T_BYTE: | |
| 858 fac->static_byte_count++; | |
| 859 atype = STATIC_BYTE; | |
| 860 break; | |
| 861 case T_LONG: | |
| 862 case T_DOUBLE: | |
| 863 if (Universe::field_type_should_be_aligned(type)) { | |
| 864 atype = STATIC_ALIGNED_DOUBLE; | |
| 865 } else { | |
| 866 atype = STATIC_DOUBLE; | |
| 867 } | |
| 868 fac->static_double_count++; | |
| 869 break; | |
| 870 case T_CHAR: | |
| 871 case T_SHORT: | |
| 872 fac->static_short_count++; | |
| 873 atype = STATIC_SHORT; | |
| 874 break; | |
| 875 case T_FLOAT: | |
| 876 case T_INT: | |
| 877 fac->static_word_count++; | |
| 878 atype = STATIC_WORD; | |
| 879 break; | |
| 880 case T_ARRAY: | |
| 881 case T_OBJECT: | |
| 882 fac->static_oop_count++; | |
| 883 atype = STATIC_OOP; | |
| 884 break; | |
| 885 case T_ADDRESS: | |
| 886 case T_VOID: | |
| 887 default: | |
| 888 assert(0, "bad field type"); | |
| 889 } | |
| 890 } else { | |
| 891 switch ( type ) { | |
| 892 case T_BOOLEAN: | |
| 893 case T_BYTE: | |
| 894 fac->nonstatic_byte_count++; | |
| 895 atype = NONSTATIC_BYTE; | |
| 896 break; | |
| 897 case T_LONG: | |
| 898 case T_DOUBLE: | |
| 899 if (Universe::field_type_should_be_aligned(type)) { | |
| 900 atype = NONSTATIC_ALIGNED_DOUBLE; | |
| 901 } else { | |
| 902 atype = NONSTATIC_DOUBLE; | |
| 903 } | |
| 904 fac->nonstatic_double_count++; | |
| 905 break; | |
| 906 case T_CHAR: | |
| 907 case T_SHORT: | |
| 908 fac->nonstatic_short_count++; | |
| 909 atype = NONSTATIC_SHORT; | |
| 910 break; | |
| 911 case T_FLOAT: | |
| 912 case T_INT: | |
| 913 fac->nonstatic_word_count++; | |
| 914 atype = NONSTATIC_WORD; | |
| 915 break; | |
| 916 case T_ARRAY: | |
| 917 case T_OBJECT: | |
| 918 fac->nonstatic_oop_count++; | |
| 919 atype = NONSTATIC_OOP; | |
| 920 break; | |
| 921 case T_ADDRESS: | |
| 922 case T_VOID: | |
| 923 default: | |
| 924 assert(0, "bad field type"); | |
| 925 } | |
| 926 } | |
| 927 | |
| 928 // The correct offset is computed later (all oop fields will be located together) | |
| 929 // We temporarily store the allocation type in the offset field | |
| 930 fields->short_at_put(index++, atype); | |
| 931 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
| 932 fields->short_at_put(index++, generic_signature_index); | |
| 933 } | |
| 934 | |
| 935 if (_need_verify && length > 1) { | |
| 936 // Check duplicated fields | |
| 937 ResourceMark rm(THREAD); | |
| 938 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 939 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 940 initialize_hashtable(names_and_sigs); | |
| 941 bool dup = false; | |
| 942 { | |
| 943 debug_only(No_Safepoint_Verifier nsv;) | |
| 944 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
| 945 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
| 946 symbolOop name = cp->symbol_at(name_index); | |
| 947 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); | |
| 948 symbolOop sig = cp->symbol_at(sig_index); | |
| 949 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 950 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
| 951 dup = true; | |
| 952 break; | |
| 953 } | |
| 954 } | |
| 955 } | |
| 956 if (dup) { | |
| 957 classfile_parse_error("Duplicate field name&signature in class file %s", | |
| 958 CHECK_(nullHandle)); | |
| 959 } | |
| 960 } | |
| 961 | |
| 962 return fields; | |
| 963 } | |
| 964 | |
| 965 | |
| 966 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
| 967 while (length-- > 0) { | |
| 968 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
| 969 } | |
| 970 } | |
| 971 | |
| 972 | |
| 973 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
| 974 u4 exception_table_length, | |
| 975 constantPoolHandle cp, | |
| 976 TRAPS) { | |
| 977 ClassFileStream* cfs = stream(); | |
| 978 typeArrayHandle nullHandle; | |
| 979 | |
| 980 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
| 981 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
| 982 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
| 983 | |
| 984 int index = 0; | |
| 985 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
| 986 for (unsigned int i = 0; i < exception_table_length; i++) { | |
| 987 u2 start_pc = cfs->get_u2_fast(); | |
| 988 u2 end_pc = cfs->get_u2_fast(); | |
| 989 u2 handler_pc = cfs->get_u2_fast(); | |
| 990 u2 catch_type_index = cfs->get_u2_fast(); | |
| 991 // Will check legal target after parsing code array in verifier. | |
| 992 if (_need_verify) { | |
| 993 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
| 994 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
| 995 guarantee_property(handler_pc < code_length, | |
| 996 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
| 997 if (catch_type_index != 0) { | |
| 998 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
|
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changeset
|
999 is_klass_reference(cp, catch_type_index), |
| 0 | 1000 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); |
| 1001 } | |
| 1002 } | |
| 1003 exception_handlers->int_at_put(index++, start_pc); | |
| 1004 exception_handlers->int_at_put(index++, end_pc); | |
| 1005 exception_handlers->int_at_put(index++, handler_pc); | |
| 1006 exception_handlers->int_at_put(index++, catch_type_index); | |
| 1007 } | |
| 1008 return exception_handlers; | |
| 1009 } | |
| 1010 | |
| 1011 void ClassFileParser::parse_linenumber_table( | |
| 1012 u4 code_attribute_length, u4 code_length, | |
| 1013 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
| 1014 ClassFileStream* cfs = stream(); | |
| 1015 unsigned int num_entries = cfs->get_u2(CHECK); | |
| 1016 | |
| 1017 // Each entry is a u2 start_pc, and a u2 line_number | |
| 1018 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
| 1019 | |
| 1020 // Verify line number attribute and table length | |
| 1021 check_property( | |
| 1022 code_attribute_length == sizeof(u2) + length_in_bytes, | |
| 1023 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
| 1024 | |
| 1025 cfs->guarantee_more(length_in_bytes, CHECK); | |
| 1026 | |
| 1027 if ((*write_stream) == NULL) { | |
| 1028 if (length_in_bytes > fixed_buffer_size) { | |
| 1029 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
| 1030 } else { | |
| 1031 (*write_stream) = new CompressedLineNumberWriteStream( | |
| 1032 linenumbertable_buffer, fixed_buffer_size); | |
| 1033 } | |
| 1034 } | |
| 1035 | |
| 1036 while (num_entries-- > 0) { | |
| 1037 u2 bci = cfs->get_u2_fast(); // start_pc | |
| 1038 u2 line = cfs->get_u2_fast(); // line_number | |
| 1039 guarantee_property(bci < code_length, | |
| 1040 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
| 1041 (*write_stream)->write_pair(bci, line); | |
| 1042 } | |
| 1043 } | |
| 1044 | |
| 1045 | |
| 1046 // Class file LocalVariableTable elements. | |
| 1047 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
| 1048 public: | |
| 1049 u2 start_bci; | |
| 1050 u2 length; | |
| 1051 u2 name_cp_index; | |
| 1052 u2 descriptor_cp_index; | |
| 1053 u2 slot; | |
| 1054 }; | |
| 1055 | |
| 1056 | |
| 1057 class LVT_Hash: public CHeapObj { | |
| 1058 public: | |
| 1059 LocalVariableTableElement *_elem; // element | |
| 1060 LVT_Hash* _next; // Next entry in hash table | |
| 1061 }; | |
| 1062 | |
| 1063 unsigned int hash(LocalVariableTableElement *elem) { | |
| 1064 unsigned int raw_hash = elem->start_bci; | |
| 1065 | |
| 1066 raw_hash = elem->length + raw_hash * 37; | |
| 1067 raw_hash = elem->name_cp_index + raw_hash * 37; | |
| 1068 raw_hash = elem->slot + raw_hash * 37; | |
| 1069 | |
| 1070 return raw_hash % HASH_ROW_SIZE; | |
| 1071 } | |
| 1072 | |
| 1073 void initialize_hashtable(LVT_Hash** table) { | |
| 1074 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 1075 table[i] = NULL; | |
| 1076 } | |
| 1077 } | |
| 1078 | |
| 1079 void clear_hashtable(LVT_Hash** table) { | |
| 1080 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 1081 LVT_Hash* current = table[i]; | |
| 1082 LVT_Hash* next; | |
| 1083 while (current != NULL) { | |
| 1084 next = current->_next; | |
| 1085 current->_next = NULL; | |
| 1086 delete(current); | |
| 1087 current = next; | |
| 1088 } | |
| 1089 table[i] = NULL; | |
| 1090 } | |
| 1091 } | |
| 1092 | |
| 1093 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
| 1094 LVT_Hash* entry = table[index]; | |
| 1095 | |
| 1096 /* | |
| 1097 * 3-tuple start_bci/length/slot has to be unique key, | |
| 1098 * so the following comparison seems to be redundant: | |
| 1099 * && elem->name_cp_index == entry->_elem->name_cp_index | |
| 1100 */ | |
| 1101 while (entry != NULL) { | |
| 1102 if (elem->start_bci == entry->_elem->start_bci | |
| 1103 && elem->length == entry->_elem->length | |
| 1104 && elem->name_cp_index == entry->_elem->name_cp_index | |
| 1105 && elem->slot == entry->_elem->slot | |
| 1106 ) { | |
| 1107 return entry; | |
| 1108 } | |
| 1109 entry = entry->_next; | |
| 1110 } | |
| 1111 return NULL; | |
| 1112 } | |
| 1113 | |
| 1114 // Return false if the local variable is found in table. | |
| 1115 // Return true if no duplicate is found. | |
| 1116 // And local variable is added as a new entry in table. | |
| 1117 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
| 1118 // First lookup for duplicates | |
| 1119 int index = hash(elem); | |
| 1120 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
| 1121 | |
| 1122 if (entry != NULL) { | |
| 1123 return false; | |
| 1124 } | |
| 1125 // No duplicate is found, allocate a new entry and fill it. | |
| 1126 if ((entry = new LVT_Hash()) == NULL) { | |
| 1127 return false; | |
| 1128 } | |
| 1129 entry->_elem = elem; | |
| 1130 | |
| 1131 // Insert into hash table | |
| 1132 entry->_next = table[index]; | |
| 1133 table[index] = entry; | |
| 1134 | |
| 1135 return true; | |
| 1136 } | |
| 1137 | |
| 1138 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
| 1139 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
| 1140 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
| 1141 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
| 1142 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
| 1143 lvt->signature_cp_index = 0; | |
| 1144 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
| 1145 } | |
| 1146 | |
| 1147 // Function is used to parse both attributes: | |
| 1148 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
| 1149 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
| 1150 u2 max_locals, | |
| 1151 u4 code_attribute_length, | |
| 1152 constantPoolHandle cp, | |
| 1153 u2* localvariable_table_length, | |
| 1154 bool isLVTT, | |
| 1155 TRAPS) { | |
| 1156 ClassFileStream* cfs = stream(); | |
| 1157 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
| 1158 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
| 1159 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
| 1160 // Verify local variable table attribute has right length | |
| 1161 if (_need_verify) { | |
| 1162 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
| 1163 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
| 1164 } | |
| 1165 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
| 1166 assert(localvariable_table_start != NULL, "null local variable table"); | |
| 1167 if (!_need_verify) { | |
| 1168 cfs->skip_u2_fast(size); | |
| 1169 } else { | |
| 1170 cfs->guarantee_more(size * 2, CHECK_NULL); | |
| 1171 for(int i = 0; i < (*localvariable_table_length); i++) { | |
| 1172 u2 start_pc = cfs->get_u2_fast(); | |
| 1173 u2 length = cfs->get_u2_fast(); | |
| 1174 u2 name_index = cfs->get_u2_fast(); | |
| 1175 u2 descriptor_index = cfs->get_u2_fast(); | |
| 1176 u2 index = cfs->get_u2_fast(); | |
| 1177 // Assign to a u4 to avoid overflow | |
| 1178 u4 end_pc = (u4)start_pc + (u4)length; | |
| 1179 | |
| 1180 if (start_pc >= code_length) { | |
| 1181 classfile_parse_error( | |
| 1182 "Invalid start_pc %u in %s in class file %s", | |
| 1183 start_pc, tbl_name, CHECK_NULL); | |
| 1184 } | |
| 1185 if (end_pc > code_length) { | |
| 1186 classfile_parse_error( | |
| 1187 "Invalid length %u in %s in class file %s", | |
| 1188 length, tbl_name, CHECK_NULL); | |
| 1189 } | |
| 1190 int cp_size = cp->length(); | |
| 1191 guarantee_property( | |
| 1192 valid_cp_range(name_index, cp_size) && | |
| 1193 cp->tag_at(name_index).is_utf8(), | |
| 1194 "Name index %u in %s has bad constant type in class file %s", | |
| 1195 name_index, tbl_name, CHECK_NULL); | |
| 1196 guarantee_property( | |
| 1197 valid_cp_range(descriptor_index, cp_size) && | |
| 1198 cp->tag_at(descriptor_index).is_utf8(), | |
| 1199 "Signature index %u in %s has bad constant type in class file %s", | |
| 1200 descriptor_index, tbl_name, CHECK_NULL); | |
| 1201 | |
| 1202 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 1203 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index)); | |
| 1204 verify_legal_field_name(name, CHECK_NULL); | |
| 1205 u2 extra_slot = 0; | |
| 1206 if (!isLVTT) { | |
| 1207 verify_legal_field_signature(name, sig, CHECK_NULL); | |
| 1208 | |
| 1209 // 4894874: check special cases for double and long local variables | |
| 1210 if (sig() == vmSymbols::type_signature(T_DOUBLE) || | |
| 1211 sig() == vmSymbols::type_signature(T_LONG)) { | |
| 1212 extra_slot = 1; | |
| 1213 } | |
| 1214 } | |
| 1215 guarantee_property((index + extra_slot) < max_locals, | |
| 1216 "Invalid index %u in %s in class file %s", | |
| 1217 index, tbl_name, CHECK_NULL); | |
| 1218 } | |
| 1219 } | |
| 1220 return localvariable_table_start; | |
| 1221 } | |
| 1222 | |
| 1223 | |
| 1224 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
| 1225 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
| 1226 ClassFileStream* cfs = stream(); | |
| 1227 u2 index = 0; // index in the array with long/double occupying two slots | |
| 1228 u4 i1 = *u1_index; | |
| 1229 u4 i2 = *u2_index + 1; | |
| 1230 for(int i = 0; i < array_length; i++) { | |
| 1231 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
| 1232 index++; | |
| 1233 if (tag == ITEM_Long || tag == ITEM_Double) { | |
| 1234 index++; | |
| 1235 } else if (tag == ITEM_Object) { | |
| 1236 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1237 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
|
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1238 is_klass_reference(cp, class_index), |
| 0 | 1239 "Bad class index %u in StackMap in class file %s", |
| 1240 class_index, CHECK); | |
| 1241 } else if (tag == ITEM_Uninitialized) { | |
| 1242 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1243 guarantee_property( | |
| 1244 offset < code_length, | |
| 1245 "Bad uninitialized type offset %u in StackMap in class file %s", | |
| 1246 offset, CHECK); | |
| 1247 } else { | |
| 1248 guarantee_property( | |
| 1249 tag <= (u1)ITEM_Uninitialized, | |
| 1250 "Unknown variable type %u in StackMap in class file %s", | |
| 1251 tag, CHECK); | |
| 1252 } | |
| 1253 } | |
| 1254 u2_array[*u2_index] = index; | |
| 1255 *u1_index = i1; | |
| 1256 *u2_index = i2; | |
| 1257 } | |
| 1258 | |
| 1259 typeArrayOop ClassFileParser::parse_stackmap_table( | |
| 1260 u4 code_attribute_length, TRAPS) { | |
| 1261 if (code_attribute_length == 0) | |
| 1262 return NULL; | |
| 1263 | |
| 1264 ClassFileStream* cfs = stream(); | |
| 1265 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
| 1266 assert(stackmap_table_start != NULL, "null stackmap table"); | |
| 1267 | |
| 1268 // check code_attribute_length first | |
| 1269 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
| 1270 | |
| 1271 if (!_need_verify && !DumpSharedSpaces) { | |
| 1272 return NULL; | |
| 1273 } | |
| 1274 | |
| 1275 typeArrayOop stackmap_data = | |
| 1276 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
| 1277 | |
| 1278 stackmap_data->set_length(code_attribute_length); | |
| 1279 memcpy((void*)stackmap_data->byte_at_addr(0), | |
| 1280 (void*)stackmap_table_start, code_attribute_length); | |
| 1281 return stackmap_data; | |
| 1282 } | |
| 1283 | |
| 1284 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
| 1285 u4 method_attribute_length, | |
| 1286 constantPoolHandle cp, TRAPS) { | |
| 1287 ClassFileStream* cfs = stream(); | |
| 1288 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
| 1289 *checked_exceptions_length = cfs->get_u2_fast(); | |
| 1290 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1291 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
| 1292 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
| 1293 if (!_need_verify) { | |
| 1294 cfs->skip_u2_fast(size); | |
| 1295 } else { | |
| 1296 // Verify each value in the checked exception table | |
| 1297 u2 checked_exception; | |
| 1298 u2 len = *checked_exceptions_length; | |
| 1299 cfs->guarantee_more(2 * len, CHECK_NULL); | |
| 1300 for (int i = 0; i < len; i++) { | |
| 1301 checked_exception = cfs->get_u2_fast(); | |
| 1302 check_property( | |
| 1303 valid_cp_range(checked_exception, cp->length()) && | |
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1304 is_klass_reference(cp, checked_exception), |
| 0 | 1305 "Exception name has bad type at constant pool %u in class file %s", |
| 1306 checked_exception, CHECK_NULL); | |
| 1307 } | |
| 1308 } | |
| 1309 // check exceptions attribute length | |
| 1310 if (_need_verify) { | |
| 1311 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
| 1312 sizeof(u2) * size), | |
| 1313 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
| 1314 } | |
| 1315 return checked_exceptions_start; | |
| 1316 } | |
| 1317 | |
| 1318 | |
| 1319 #define MAX_ARGS_SIZE 255 | |
| 1320 #define MAX_CODE_SIZE 65535 | |
| 1321 #define INITIAL_MAX_LVT_NUMBER 256 | |
| 1322 | |
| 1323 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
| 1324 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
| 1325 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
| 1326 // entire method attribute is parsed. | |
| 1327 // | |
| 1328 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1329 // from the method back up to the containing klass. These flag values | |
| 1330 // are added to klass's access_flags. | |
| 1331 | |
| 1332 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
| 1333 AccessFlags *promoted_flags, | |
| 1334 typeArrayHandle* method_annotations, | |
| 1335 typeArrayHandle* method_parameter_annotations, | |
| 1336 typeArrayHandle* method_default_annotations, | |
| 1337 TRAPS) { | |
| 1338 ClassFileStream* cfs = stream(); | |
| 1339 methodHandle nullHandle; | |
| 1340 ResourceMark rm(THREAD); | |
| 1341 // Parse fixed parts | |
| 1342 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 1343 | |
| 1344 int flags = cfs->get_u2_fast(); | |
| 1345 u2 name_index = cfs->get_u2_fast(); | |
| 1346 int cp_size = cp->length(); | |
| 1347 check_property( | |
| 1348 valid_cp_range(name_index, cp_size) && | |
| 1349 cp->tag_at(name_index).is_utf8(), | |
| 1350 "Illegal constant pool index %u for method name in class file %s", | |
| 1351 name_index, CHECK_(nullHandle)); | |
| 1352 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 1353 verify_legal_method_name(name, CHECK_(nullHandle)); | |
| 1354 | |
| 1355 u2 signature_index = cfs->get_u2_fast(); | |
| 1356 guarantee_property( | |
| 1357 valid_cp_range(signature_index, cp_size) && | |
| 1358 cp->tag_at(signature_index).is_utf8(), | |
| 1359 "Illegal constant pool index %u for method signature in class file %s", | |
| 1360 signature_index, CHECK_(nullHandle)); | |
| 1361 symbolHandle signature(THREAD, cp->symbol_at(signature_index)); | |
| 1362 | |
| 1363 AccessFlags access_flags; | |
| 1364 if (name == vmSymbols::class_initializer_name()) { | |
| 1365 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
| 1366 flags = JVM_ACC_STATIC; | |
| 1367 } else { | |
| 1368 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
| 1369 } | |
| 1370 | |
| 1371 int args_size = -1; // only used when _need_verify is true | |
| 1372 if (_need_verify) { | |
| 1373 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
| 1374 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 1375 if (args_size > MAX_ARGS_SIZE) { | |
| 1376 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
| 1377 } | |
| 1378 } | |
| 1379 | |
| 1380 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 1381 | |
| 1382 // Default values for code and exceptions attribute elements | |
| 1383 u2 max_stack = 0; | |
| 1384 u2 max_locals = 0; | |
| 1385 u4 code_length = 0; | |
| 1386 u1* code_start = 0; | |
| 1387 u2 exception_table_length = 0; | |
| 1388 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
| 1389 u2 checked_exceptions_length = 0; | |
| 1390 u2* checked_exceptions_start = NULL; | |
| 1391 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
| 1392 int linenumber_table_length = 0; | |
| 1393 int total_lvt_length = 0; | |
| 1394 u2 lvt_cnt = 0; | |
| 1395 u2 lvtt_cnt = 0; | |
| 1396 bool lvt_allocated = false; | |
| 1397 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1398 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1399 u2* localvariable_table_length; | |
| 1400 u2** localvariable_table_start; | |
| 1401 u2* localvariable_type_table_length; | |
| 1402 u2** localvariable_type_table_start; | |
| 1403 bool parsed_code_attribute = false; | |
| 1404 bool parsed_checked_exceptions_attribute = false; | |
| 1405 bool parsed_stackmap_attribute = false; | |
| 1406 // stackmap attribute - JDK1.5 | |
| 1407 typeArrayHandle stackmap_data; | |
| 1408 u2 generic_signature_index = 0; | |
| 1409 u1* runtime_visible_annotations = NULL; | |
| 1410 int runtime_visible_annotations_length = 0; | |
| 1411 u1* runtime_invisible_annotations = NULL; | |
| 1412 int runtime_invisible_annotations_length = 0; | |
| 1413 u1* runtime_visible_parameter_annotations = NULL; | |
| 1414 int runtime_visible_parameter_annotations_length = 0; | |
| 1415 u1* runtime_invisible_parameter_annotations = NULL; | |
| 1416 int runtime_invisible_parameter_annotations_length = 0; | |
| 1417 u1* annotation_default = NULL; | |
| 1418 int annotation_default_length = 0; | |
| 1419 | |
| 1420 // Parse code and exceptions attribute | |
| 1421 u2 method_attributes_count = cfs->get_u2_fast(); | |
| 1422 while (method_attributes_count--) { | |
| 1423 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
| 1424 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
| 1425 u4 method_attribute_length = cfs->get_u4_fast(); | |
| 1426 check_property( | |
| 1427 valid_cp_range(method_attribute_name_index, cp_size) && | |
| 1428 cp->tag_at(method_attribute_name_index).is_utf8(), | |
| 1429 "Invalid method attribute name index %u in class file %s", | |
| 1430 method_attribute_name_index, CHECK_(nullHandle)); | |
| 1431 | |
| 1432 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index); | |
| 1433 if (method_attribute_name == vmSymbols::tag_code()) { | |
| 1434 // Parse Code attribute | |
| 1435 if (_need_verify) { | |
| 1436 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
| 1437 "Code attribute in native or abstract methods in class file %s", | |
| 1438 CHECK_(nullHandle)); | |
| 1439 } | |
| 1440 if (parsed_code_attribute) { | |
| 1441 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
| 1442 } | |
| 1443 parsed_code_attribute = true; | |
| 1444 | |
| 1445 // Stack size, locals size, and code size | |
| 1446 if (_major_version == 45 && _minor_version <= 2) { | |
| 1447 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
| 1448 max_stack = cfs->get_u1_fast(); | |
| 1449 max_locals = cfs->get_u1_fast(); | |
| 1450 code_length = cfs->get_u2_fast(); | |
| 1451 } else { | |
| 1452 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
| 1453 max_stack = cfs->get_u2_fast(); | |
| 1454 max_locals = cfs->get_u2_fast(); | |
| 1455 code_length = cfs->get_u4_fast(); | |
| 1456 } | |
| 1457 if (_need_verify) { | |
| 1458 guarantee_property(args_size <= max_locals, | |
| 1459 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
| 1460 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
| 1461 "Invalid method Code length %u in class file %s", | |
| 1462 code_length, CHECK_(nullHandle)); | |
| 1463 } | |
| 1464 // Code pointer | |
| 1465 code_start = cfs->get_u1_buffer(); | |
| 1466 assert(code_start != NULL, "null code start"); | |
| 1467 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
| 1468 cfs->skip_u1_fast(code_length); | |
| 1469 | |
| 1470 // Exception handler table | |
| 1471 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
| 1472 exception_table_length = cfs->get_u2_fast(); | |
| 1473 if (exception_table_length > 0) { | |
| 1474 exception_handlers = | |
| 1475 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
| 1476 } | |
| 1477 | |
| 1478 // Parse additional attributes in code attribute | |
| 1479 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
| 1480 u2 code_attributes_count = cfs->get_u2_fast(); | |
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1481 |
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1482 unsigned int calculated_attribute_length = 0; |
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1483 |
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1484 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1485 calculated_attribute_length = |
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1486 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1487 } else { |
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1488 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1489 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1490 } |
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1491 calculated_attribute_length += |
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1492 code_length + |
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1493 sizeof(exception_table_length) + |
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1494 sizeof(code_attributes_count) + |
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1495 exception_table_length * |
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1496 ( sizeof(u2) + // start_pc |
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1497 sizeof(u2) + // end_pc |
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1498 sizeof(u2) + // handler_pc |
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1499 sizeof(u2) ); // catch_type_index |
| 0 | 1500 |
| 1501 while (code_attributes_count--) { | |
| 1502 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
| 1503 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
| 1504 u4 code_attribute_length = cfs->get_u4_fast(); | |
| 1505 calculated_attribute_length += code_attribute_length + | |
| 1506 sizeof(code_attribute_name_index) + | |
| 1507 sizeof(code_attribute_length); | |
| 1508 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
| 1509 cp->tag_at(code_attribute_name_index).is_utf8(), | |
| 1510 "Invalid code attribute name index %u in class file %s", | |
| 1511 code_attribute_name_index, | |
| 1512 CHECK_(nullHandle)); | |
| 1513 if (LoadLineNumberTables && | |
| 1514 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
| 1515 // Parse and compress line number table | |
| 1516 parse_linenumber_table(code_attribute_length, code_length, | |
| 1517 &linenumber_table, CHECK_(nullHandle)); | |
| 1518 | |
| 1519 } else if (LoadLocalVariableTables && | |
| 1520 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
| 1521 // Parse local variable table | |
| 1522 if (!lvt_allocated) { | |
| 1523 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1524 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1525 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1526 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1527 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1528 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1529 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1530 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1531 lvt_allocated = true; | |
| 1532 } | |
| 1533 if (lvt_cnt == max_lvt_cnt) { | |
| 1534 max_lvt_cnt <<= 1; | |
| 1535 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
| 1536 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
| 1537 } | |
| 1538 localvariable_table_start[lvt_cnt] = | |
| 1539 parse_localvariable_table(code_length, | |
| 1540 max_locals, | |
| 1541 code_attribute_length, | |
| 1542 cp, | |
| 1543 &localvariable_table_length[lvt_cnt], | |
| 1544 false, // is not LVTT | |
| 1545 CHECK_(nullHandle)); | |
| 1546 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
| 1547 lvt_cnt++; | |
| 1548 } else if (LoadLocalVariableTypeTables && | |
| 1549 _major_version >= JAVA_1_5_VERSION && | |
| 1550 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
| 1551 if (!lvt_allocated) { | |
| 1552 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1553 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1554 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1555 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1556 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1557 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1558 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1559 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1560 lvt_allocated = true; | |
| 1561 } | |
| 1562 // Parse local variable type table | |
| 1563 if (lvtt_cnt == max_lvtt_cnt) { | |
| 1564 max_lvtt_cnt <<= 1; | |
| 1565 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
| 1566 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
| 1567 } | |
| 1568 localvariable_type_table_start[lvtt_cnt] = | |
| 1569 parse_localvariable_table(code_length, | |
| 1570 max_locals, | |
| 1571 code_attribute_length, | |
| 1572 cp, | |
| 1573 &localvariable_type_table_length[lvtt_cnt], | |
| 1574 true, // is LVTT | |
| 1575 CHECK_(nullHandle)); | |
| 1576 lvtt_cnt++; | |
| 1577 } else if (UseSplitVerifier && | |
| 1578 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
| 1579 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
| 1580 // Stack map is only needed by the new verifier in JDK1.5. | |
| 1581 if (parsed_stackmap_attribute) { | |
| 1582 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
| 1583 } | |
| 1584 typeArrayOop sm = | |
| 1585 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
| 1586 stackmap_data = typeArrayHandle(THREAD, sm); | |
| 1587 parsed_stackmap_attribute = true; | |
| 1588 } else { | |
| 1589 // Skip unknown attributes | |
| 1590 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
| 1591 } | |
| 1592 } | |
| 1593 // check method attribute length | |
| 1594 if (_need_verify) { | |
| 1595 guarantee_property(method_attribute_length == calculated_attribute_length, | |
| 1596 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
| 1597 } | |
| 1598 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
| 1599 // Parse Exceptions attribute | |
| 1600 if (parsed_checked_exceptions_attribute) { | |
| 1601 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
| 1602 } | |
| 1603 parsed_checked_exceptions_attribute = true; | |
| 1604 checked_exceptions_start = | |
| 1605 parse_checked_exceptions(&checked_exceptions_length, | |
| 1606 method_attribute_length, | |
| 1607 cp, CHECK_(nullHandle)); | |
| 1608 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
| 1609 if (method_attribute_length != 0) { | |
| 1610 classfile_parse_error( | |
| 1611 "Invalid Synthetic method attribute length %u in class file %s", | |
| 1612 method_attribute_length, CHECK_(nullHandle)); | |
| 1613 } | |
| 1614 // Should we check that there hasn't already been a synthetic attribute? | |
| 1615 access_flags.set_is_synthetic(); | |
| 1616 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 1617 if (method_attribute_length != 0) { | |
| 1618 classfile_parse_error( | |
| 1619 "Invalid Deprecated method attribute length %u in class file %s", | |
| 1620 method_attribute_length, CHECK_(nullHandle)); | |
| 1621 } | |
| 1622 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 1623 if (method_attribute_name == vmSymbols::tag_signature()) { | |
| 1624 if (method_attribute_length != 2) { | |
| 1625 classfile_parse_error( | |
| 1626 "Invalid Signature attribute length %u in class file %s", | |
| 1627 method_attribute_length, CHECK_(nullHandle)); | |
| 1628 } | |
| 1629 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
| 1630 generic_signature_index = cfs->get_u2_fast(); | |
| 1631 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 1632 runtime_visible_annotations_length = method_attribute_length; | |
| 1633 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 1634 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 1635 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
| 1636 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 1637 runtime_invisible_annotations_length = method_attribute_length; | |
| 1638 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 1639 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 1640 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
| 1641 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
| 1642 runtime_visible_parameter_annotations_length = method_attribute_length; | |
| 1643 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1644 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
| 1645 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1646 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
| 1647 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
| 1648 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1649 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
| 1650 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1651 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
| 1652 annotation_default_length = method_attribute_length; | |
| 1653 annotation_default = cfs->get_u1_buffer(); | |
| 1654 assert(annotation_default != NULL, "null annotation default"); | |
| 1655 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
| 1656 } else { | |
| 1657 // Skip unknown attributes | |
| 1658 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1659 } | |
| 1660 } else { | |
| 1661 // Skip unknown attributes | |
| 1662 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1663 } | |
| 1664 } | |
| 1665 | |
| 1666 if (linenumber_table != NULL) { | |
| 1667 linenumber_table->write_terminator(); | |
| 1668 linenumber_table_length = linenumber_table->position(); | |
| 1669 } | |
| 1670 | |
| 1671 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
| 1672 if (_need_verify) { | |
| 1673 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
| 1674 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
| 1675 } | |
| 1676 | |
| 1677 // All sizing information for a methodOop is finally available, now create it | |
| 1678 methodOop m_oop = oopFactory::new_method( | |
| 1679 code_length, access_flags, linenumber_table_length, | |
|
518
0af8b0718fc9
6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
jmasa
parents:
474
diff
changeset
|
1680 total_lvt_length, checked_exceptions_length, |
|
0af8b0718fc9
6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
jmasa
parents:
474
diff
changeset
|
1681 methodOopDesc::IsSafeConc, CHECK_(nullHandle)); |
| 0 | 1682 methodHandle m (THREAD, m_oop); |
| 1683 | |
| 1684 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
| 1685 | |
| 1686 // Fill in information from fixed part (access_flags already set) | |
| 1687 m->set_constants(cp()); | |
| 1688 m->set_name_index(name_index); | |
| 1689 m->set_signature_index(signature_index); | |
| 1690 m->set_generic_signature_index(generic_signature_index); | |
| 1691 #ifdef CC_INTERP | |
| 1692 // hmm is there a gc issue here?? | |
| 1693 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
| 1694 m->set_result_index(rtf.type()); | |
| 1695 #endif | |
| 1696 | |
| 1697 if (args_size >= 0) { | |
| 1698 m->set_size_of_parameters(args_size); | |
| 1699 } else { | |
| 1700 m->compute_size_of_parameters(THREAD); | |
| 1701 } | |
| 1702 #ifdef ASSERT | |
| 1703 if (args_size >= 0) { | |
| 1704 m->compute_size_of_parameters(THREAD); | |
| 1705 assert(args_size == m->size_of_parameters(), ""); | |
| 1706 } | |
| 1707 #endif | |
| 1708 | |
| 1709 // Fill in code attribute information | |
| 1710 m->set_max_stack(max_stack); | |
| 1711 m->set_max_locals(max_locals); | |
| 1712 m->constMethod()->set_stackmap_data(stackmap_data()); | |
| 1713 | |
| 1714 /** | |
| 1715 * The exception_table field is the flag used to indicate | |
| 1716 * that the methodOop and it's associated constMethodOop are partially | |
| 1717 * initialized and thus are exempt from pre/post GC verification. Once | |
| 1718 * the field is set, the oops are considered fully initialized so make | |
| 1719 * sure that the oops can pass verification when this field is set. | |
| 1720 */ | |
| 1721 m->set_exception_table(exception_handlers()); | |
| 1722 | |
| 1723 // Copy byte codes | |
| 1724 if (code_length > 0) { | |
| 1725 memcpy(m->code_base(), code_start, code_length); | |
| 1726 } | |
| 1727 | |
| 1728 // Copy line number table | |
| 1729 if (linenumber_table != NULL) { | |
| 1730 memcpy(m->compressed_linenumber_table(), | |
| 1731 linenumber_table->buffer(), linenumber_table_length); | |
| 1732 } | |
| 1733 | |
| 1734 // Copy checked exceptions | |
| 1735 if (checked_exceptions_length > 0) { | |
| 1736 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1737 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
| 1738 } | |
| 1739 | |
| 1740 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
| 1741 * | |
| 1742 * Rules for LVT's and LVTT's are: | |
| 1743 * - There can be any number of LVT's and LVTT's. | |
| 1744 * - If there are n LVT's, it is the same as if there was just | |
| 1745 * one LVT containing all the entries from the n LVT's. | |
| 1746 * - There may be no more than one LVT entry per local variable. | |
| 1747 * Two LVT entries are 'equal' if these fields are the same: | |
| 1748 * start_pc, length, name, slot | |
| 1749 * - There may be no more than one LVTT entry per each LVT entry. | |
| 1750 * Each LVTT entry has to match some LVT entry. | |
| 1751 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
| 1752 */ | |
| 1753 if (total_lvt_length > 0) { | |
| 1754 int tbl_no, idx; | |
| 1755 | |
| 1756 promoted_flags->set_has_localvariable_table(); | |
| 1757 | |
| 1758 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
| 1759 initialize_hashtable(lvt_Hash); | |
| 1760 | |
| 1761 // To fill LocalVariableTable in | |
| 1762 Classfile_LVT_Element* cf_lvt; | |
| 1763 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
| 1764 | |
| 1765 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
| 1766 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
| 1767 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
| 1768 copy_lvt_element(&cf_lvt[idx], lvt); | |
| 1769 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
| 1770 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
| 1771 && _need_verify | |
| 1772 && _major_version >= JAVA_1_5_VERSION ) { | |
| 1773 clear_hashtable(lvt_Hash); | |
| 1774 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
| 1775 "entry for '%s' in class file %s", | |
| 1776 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
| 1777 CHECK_(nullHandle)); | |
| 1778 } | |
| 1779 } | |
| 1780 } | |
| 1781 | |
| 1782 // To merge LocalVariableTable and LocalVariableTypeTable | |
| 1783 Classfile_LVT_Element* cf_lvtt; | |
| 1784 LocalVariableTableElement lvtt_elem; | |
| 1785 | |
| 1786 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
| 1787 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
| 1788 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
| 1789 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
| 1790 int index = hash(&lvtt_elem); | |
| 1791 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
| 1792 if (entry == NULL) { | |
| 1793 if (_need_verify) { | |
| 1794 clear_hashtable(lvt_Hash); | |
| 1795 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
| 1796 "does not match any LVT entry", | |
| 1797 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 1798 CHECK_(nullHandle)); | |
| 1799 } | |
| 1800 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
| 1801 clear_hashtable(lvt_Hash); | |
| 1802 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
| 1803 "entry for '%s' in class file %s", | |
| 1804 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 1805 CHECK_(nullHandle)); | |
| 1806 } else { | |
| 1807 // to add generic signatures into LocalVariableTable | |
| 1808 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
| 1809 } | |
| 1810 } | |
| 1811 } | |
| 1812 clear_hashtable(lvt_Hash); | |
| 1813 } | |
| 1814 | |
| 1815 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
| 1816 runtime_visible_annotations_length, | |
| 1817 runtime_invisible_annotations, | |
| 1818 runtime_invisible_annotations_length, | |
| 1819 CHECK_(nullHandle)); | |
| 1820 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
| 1821 runtime_visible_parameter_annotations_length, | |
| 1822 runtime_invisible_parameter_annotations, | |
| 1823 runtime_invisible_parameter_annotations_length, | |
| 1824 CHECK_(nullHandle)); | |
| 1825 *method_default_annotations = assemble_annotations(annotation_default, | |
| 1826 annotation_default_length, | |
| 1827 NULL, | |
| 1828 0, | |
| 1829 CHECK_(nullHandle)); | |
| 1830 | |
| 1831 if (name() == vmSymbols::finalize_method_name() && | |
| 1832 signature() == vmSymbols::void_method_signature()) { | |
| 1833 if (m->is_empty_method()) { | |
| 1834 _has_empty_finalizer = true; | |
| 1835 } else { | |
| 1836 _has_finalizer = true; | |
| 1837 } | |
| 1838 } | |
| 1839 if (name() == vmSymbols::object_initializer_name() && | |
| 1840 signature() == vmSymbols::void_method_signature() && | |
| 1841 m->is_vanilla_constructor()) { | |
| 1842 _has_vanilla_constructor = true; | |
| 1843 } | |
| 1844 | |
| 710 | 1845 if (EnableMethodHandles && m->is_method_handle_invoke()) { |
| 1846 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(), | |
| 1847 "Method handle invokers must be defined internally to the VM", nullHandle); | |
| 1848 } | |
| 1849 | |
| 0 | 1850 return m; |
| 1851 } | |
| 1852 | |
| 1853 | |
| 1854 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1855 // from the methods back up to the containing klass. These flag values | |
| 1856 // are added to klass's access_flags. | |
| 1857 | |
| 1858 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
| 1859 AccessFlags* promoted_flags, | |
| 1860 bool* has_final_method, | |
| 1861 objArrayOop* methods_annotations_oop, | |
| 1862 objArrayOop* methods_parameter_annotations_oop, | |
| 1863 objArrayOop* methods_default_annotations_oop, | |
| 1864 TRAPS) { | |
| 1865 ClassFileStream* cfs = stream(); | |
| 1866 objArrayHandle nullHandle; | |
| 1867 typeArrayHandle method_annotations; | |
| 1868 typeArrayHandle method_parameter_annotations; | |
| 1869 typeArrayHandle method_default_annotations; | |
| 1870 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 1871 u2 length = cfs->get_u2_fast(); | |
| 1872 if (length == 0) { | |
| 1873 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 1874 } else { | |
| 1875 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1876 objArrayHandle methods(THREAD, m); | |
| 1877 HandleMark hm(THREAD); | |
| 1878 objArrayHandle methods_annotations; | |
| 1879 objArrayHandle methods_parameter_annotations; | |
| 1880 objArrayHandle methods_default_annotations; | |
| 1881 for (int index = 0; index < length; index++) { | |
| 1882 methodHandle method = parse_method(cp, is_interface, | |
| 1883 promoted_flags, | |
| 1884 &method_annotations, | |
| 1885 &method_parameter_annotations, | |
| 1886 &method_default_annotations, | |
| 1887 CHECK_(nullHandle)); | |
| 1888 if (method->is_final()) { | |
| 1889 *has_final_method = true; | |
| 1890 } | |
| 1891 methods->obj_at_put(index, method()); | |
| 1892 if (method_annotations.not_null()) { | |
| 1893 if (methods_annotations.is_null()) { | |
| 1894 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1895 methods_annotations = objArrayHandle(THREAD, md); | |
| 1896 } | |
| 1897 methods_annotations->obj_at_put(index, method_annotations()); | |
| 1898 } | |
| 1899 if (method_parameter_annotations.not_null()) { | |
| 1900 if (methods_parameter_annotations.is_null()) { | |
| 1901 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1902 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
| 1903 } | |
| 1904 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
| 1905 } | |
| 1906 if (method_default_annotations.not_null()) { | |
| 1907 if (methods_default_annotations.is_null()) { | |
| 1908 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1909 methods_default_annotations = objArrayHandle(THREAD, md); | |
| 1910 } | |
| 1911 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
| 1912 } | |
| 1913 } | |
| 1914 if (_need_verify && length > 1) { | |
| 1915 // Check duplicated methods | |
| 1916 ResourceMark rm(THREAD); | |
| 1917 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1918 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 1919 initialize_hashtable(names_and_sigs); | |
| 1920 bool dup = false; | |
| 1921 { | |
| 1922 debug_only(No_Safepoint_Verifier nsv;) | |
| 1923 for (int i = 0; i < length; i++) { | |
| 1924 methodOop m = (methodOop)methods->obj_at(i); | |
| 1925 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 1926 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
| 1927 dup = true; | |
| 1928 break; | |
| 1929 } | |
| 1930 } | |
| 1931 } | |
| 1932 if (dup) { | |
| 1933 classfile_parse_error("Duplicate method name&signature in class file %s", | |
| 1934 CHECK_(nullHandle)); | |
| 1935 } | |
| 1936 } | |
| 1937 | |
| 1938 *methods_annotations_oop = methods_annotations(); | |
| 1939 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
| 1940 *methods_default_annotations_oop = methods_default_annotations(); | |
| 1941 | |
| 1942 return methods; | |
| 1943 } | |
| 1944 } | |
| 1945 | |
| 1946 | |
| 1947 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
| 1948 objArrayHandle methods_annotations, | |
| 1949 objArrayHandle methods_parameter_annotations, | |
| 1950 objArrayHandle methods_default_annotations, | |
| 1951 TRAPS) { | |
| 1952 typeArrayHandle nullHandle; | |
| 1953 int length = methods()->length(); | |
| 1954 // If JVMTI original method ordering is enabled we have to | |
| 1955 // remember the original class file ordering. | |
| 1956 // We temporarily use the vtable_index field in the methodOop to store the | |
| 1957 // class file index, so we can read in after calling qsort. | |
| 1958 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 1959 for (int index = 0; index < length; index++) { | |
| 1960 methodOop m = methodOop(methods->obj_at(index)); | |
| 1961 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
| 1962 m->set_vtable_index(index); | |
| 1963 } | |
| 1964 } | |
| 1965 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
| 1966 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare | |
| 1967 methodOopDesc::sort_methods(methods(), | |
| 1968 methods_annotations(), | |
| 1969 methods_parameter_annotations(), | |
| 1970 methods_default_annotations()); | |
| 1971 | |
| 1972 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
| 1973 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 1974 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
| 1975 typeArrayHandle method_ordering(THREAD, new_ordering); | |
| 1976 for (int index = 0; index < length; index++) { | |
| 1977 methodOop m = methodOop(methods->obj_at(index)); | |
| 1978 int old_index = m->vtable_index(); | |
| 1979 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
| 1980 method_ordering->int_at_put(index, old_index); | |
| 1981 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
| 1982 } | |
| 1983 return method_ordering; | |
| 1984 } else { | |
| 1985 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
| 1986 } | |
| 1987 } | |
| 1988 | |
| 1989 | |
| 1990 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1991 ClassFileStream* cfs = stream(); | |
| 1992 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
| 1993 u2 sourcefile_index = cfs->get_u2_fast(); | |
| 1994 check_property( | |
| 1995 valid_cp_range(sourcefile_index, cp->length()) && | |
| 1996 cp->tag_at(sourcefile_index).is_utf8(), | |
| 1997 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
| 1998 sourcefile_index, CHECK); | |
| 1999 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
| 2000 } | |
| 2001 | |
| 2002 | |
| 2003 | |
| 2004 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
| 2005 instanceKlassHandle k, | |
| 2006 int length, TRAPS) { | |
| 2007 ClassFileStream* cfs = stream(); | |
| 2008 u1* sde_buffer = cfs->get_u1_buffer(); | |
| 2009 assert(sde_buffer != NULL, "null sde buffer"); | |
| 2010 | |
| 2011 // Don't bother storing it if there is no way to retrieve it | |
| 2012 if (JvmtiExport::can_get_source_debug_extension()) { | |
| 2013 // Optimistically assume that only 1 byte UTF format is used | |
| 2014 // (common case) | |
| 2015 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer, | |
| 2016 length, CHECK); | |
| 2017 k->set_source_debug_extension(sde_symbol); | |
| 2018 } | |
| 2019 // Got utf8 string, set stream position forward | |
| 2020 cfs->skip_u1(length, CHECK); | |
| 2021 } | |
| 2022 | |
| 2023 | |
| 2024 // Inner classes can be static, private or protected (classic VM does this) | |
| 2025 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
| 2026 | |
| 2027 // Return number of classes in the inner classes attribute table | |
| 2028 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2029 ClassFileStream* cfs = stream(); | |
| 2030 cfs->guarantee_more(2, CHECK_0); // length | |
| 2031 u2 length = cfs->get_u2_fast(); | |
| 2032 | |
| 2033 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
| 2034 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
| 2035 typeArrayHandle inner_classes(THREAD, ic); | |
| 2036 int index = 0; | |
| 2037 int cp_size = cp->length(); | |
| 2038 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
| 2039 for (int n = 0; n < length; n++) { | |
| 2040 // Inner class index | |
| 2041 u2 inner_class_info_index = cfs->get_u2_fast(); | |
| 2042 check_property( | |
| 2043 inner_class_info_index == 0 || | |
| 2044 (valid_cp_range(inner_class_info_index, cp_size) && | |
|
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2045 is_klass_reference(cp, inner_class_info_index)), |
| 0 | 2046 "inner_class_info_index %u has bad constant type in class file %s", |
| 2047 inner_class_info_index, CHECK_0); | |
| 2048 // Outer class index | |
| 2049 u2 outer_class_info_index = cfs->get_u2_fast(); | |
| 2050 check_property( | |
| 2051 outer_class_info_index == 0 || | |
| 2052 (valid_cp_range(outer_class_info_index, cp_size) && | |
|
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2053 is_klass_reference(cp, outer_class_info_index)), |
| 0 | 2054 "outer_class_info_index %u has bad constant type in class file %s", |
| 2055 outer_class_info_index, CHECK_0); | |
| 2056 // Inner class name | |
| 2057 u2 inner_name_index = cfs->get_u2_fast(); | |
| 2058 check_property( | |
| 2059 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
| 2060 cp->tag_at(inner_name_index).is_utf8()), | |
| 2061 "inner_name_index %u has bad constant type in class file %s", | |
| 2062 inner_name_index, CHECK_0); | |
| 2063 if (_need_verify) { | |
| 2064 guarantee_property(inner_class_info_index != outer_class_info_index, | |
| 2065 "Class is both outer and inner class in class file %s", CHECK_0); | |
| 2066 } | |
| 2067 // Access flags | |
| 2068 AccessFlags inner_access_flags; | |
| 2069 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
| 2070 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2071 // Set abstract bit for old class files for backward compatibility | |
| 2072 flags |= JVM_ACC_ABSTRACT; | |
| 2073 } | |
| 2074 verify_legal_class_modifiers(flags, CHECK_0); | |
| 2075 inner_access_flags.set_flags(flags); | |
| 2076 | |
| 2077 inner_classes->short_at_put(index++, inner_class_info_index); | |
| 2078 inner_classes->short_at_put(index++, outer_class_info_index); | |
| 2079 inner_classes->short_at_put(index++, inner_name_index); | |
| 2080 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
| 2081 } | |
| 2082 | |
| 2083 // 4347400: make sure there's no duplicate entry in the classes array | |
| 2084 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2085 for(int i = 0; i < inner_classes->length(); i += 4) { | |
| 2086 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
| 2087 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
| 2088 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
| 2089 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
| 2090 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
| 2091 "Duplicate entry in InnerClasses in class file %s", | |
| 2092 CHECK_0); | |
| 2093 } | |
| 2094 } | |
| 2095 } | |
| 2096 | |
| 2097 // Update instanceKlass with inner class info. | |
| 2098 k->set_inner_classes(inner_classes()); | |
| 2099 return length; | |
| 2100 } | |
| 2101 | |
| 2102 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2103 k->set_is_synthetic(); | |
| 2104 } | |
| 2105 | |
| 2106 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2107 ClassFileStream* cfs = stream(); | |
| 2108 u2 signature_index = cfs->get_u2(CHECK); | |
| 2109 check_property( | |
| 2110 valid_cp_range(signature_index, cp->length()) && | |
| 2111 cp->tag_at(signature_index).is_utf8(), | |
| 2112 "Invalid constant pool index %u in Signature attribute in class file %s", | |
| 2113 signature_index, CHECK); | |
| 2114 k->set_generic_signature(cp->symbol_at(signature_index)); | |
| 2115 } | |
| 2116 | |
| 2117 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2118 ClassFileStream* cfs = stream(); | |
| 2119 // Set inner classes attribute to default sentinel | |
| 2120 k->set_inner_classes(Universe::the_empty_short_array()); | |
| 2121 cfs->guarantee_more(2, CHECK); // attributes_count | |
| 2122 u2 attributes_count = cfs->get_u2_fast(); | |
| 2123 bool parsed_sourcefile_attribute = false; | |
| 2124 bool parsed_innerclasses_attribute = false; | |
| 2125 bool parsed_enclosingmethod_attribute = false; | |
| 2126 u1* runtime_visible_annotations = NULL; | |
| 2127 int runtime_visible_annotations_length = 0; | |
| 2128 u1* runtime_invisible_annotations = NULL; | |
| 2129 int runtime_invisible_annotations_length = 0; | |
| 2130 // Iterate over attributes | |
| 2131 while (attributes_count--) { | |
| 2132 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 2133 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 2134 u4 attribute_length = cfs->get_u4_fast(); | |
| 2135 check_property( | |
| 2136 valid_cp_range(attribute_name_index, cp->length()) && | |
| 2137 cp->tag_at(attribute_name_index).is_utf8(), | |
| 2138 "Attribute name has bad constant pool index %u in class file %s", | |
| 2139 attribute_name_index, CHECK); | |
| 2140 symbolOop tag = cp->symbol_at(attribute_name_index); | |
| 2141 if (tag == vmSymbols::tag_source_file()) { | |
| 2142 // Check for SourceFile tag | |
| 2143 if (_need_verify) { | |
| 2144 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
| 2145 } | |
| 2146 if (parsed_sourcefile_attribute) { | |
| 2147 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
| 2148 } else { | |
| 2149 parsed_sourcefile_attribute = true; | |
| 2150 } | |
| 2151 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
| 2152 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
| 2153 // Check for SourceDebugExtension tag | |
| 2154 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
| 2155 } else if (tag == vmSymbols::tag_inner_classes()) { | |
| 2156 // Check for InnerClasses tag | |
| 2157 if (parsed_innerclasses_attribute) { | |
| 2158 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
| 2159 } else { | |
| 2160 parsed_innerclasses_attribute = true; | |
| 2161 } | |
| 2162 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
| 2163 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2164 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
| 2165 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
| 2166 } | |
| 2167 } else if (tag == vmSymbols::tag_synthetic()) { | |
| 2168 // Check for Synthetic tag | |
| 2169 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
| 2170 if (attribute_length != 0) { | |
| 2171 classfile_parse_error( | |
| 2172 "Invalid Synthetic classfile attribute length %u in class file %s", | |
| 2173 attribute_length, CHECK); | |
| 2174 } | |
| 2175 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
| 2176 } else if (tag == vmSymbols::tag_deprecated()) { | |
| 2177 // Check for Deprecatd tag - 4276120 | |
| 2178 if (attribute_length != 0) { | |
| 2179 classfile_parse_error( | |
| 2180 "Invalid Deprecated classfile attribute length %u in class file %s", | |
| 2181 attribute_length, CHECK); | |
| 2182 } | |
| 2183 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 2184 if (tag == vmSymbols::tag_signature()) { | |
| 2185 if (attribute_length != 2) { | |
| 2186 classfile_parse_error( | |
| 2187 "Wrong Signature attribute length %u in class file %s", | |
| 2188 attribute_length, CHECK); | |
| 2189 } | |
| 2190 parse_classfile_signature_attribute(cp, k, CHECK); | |
| 2191 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
| 2192 runtime_visible_annotations_length = attribute_length; | |
| 2193 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 2194 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 2195 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 2196 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 2197 runtime_invisible_annotations_length = attribute_length; | |
| 2198 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 2199 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 2200 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 2201 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
| 2202 if (parsed_enclosingmethod_attribute) { | |
| 2203 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
| 2204 } else { | |
| 2205 parsed_enclosingmethod_attribute = true; | |
| 2206 } | |
| 2207 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
| 2208 u2 class_index = cfs->get_u2_fast(); | |
| 2209 u2 method_index = cfs->get_u2_fast(); | |
| 2210 if (class_index == 0) { | |
| 2211 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2212 } | |
| 2213 // Validate the constant pool indices and types | |
| 2214 if (!cp->is_within_bounds(class_index) || | |
|
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|
2215 !is_klass_reference(cp, class_index)) { |
| 0 | 2216 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); |
| 2217 } | |
| 2218 if (method_index != 0 && | |
| 2219 (!cp->is_within_bounds(method_index) || | |
| 2220 !cp->tag_at(method_index).is_name_and_type())) { | |
| 2221 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2222 } | |
| 2223 k->set_enclosing_method_indices(class_index, method_index); | |
| 2224 } else { | |
| 2225 // Unknown attribute | |
| 2226 cfs->skip_u1(attribute_length, CHECK); | |
| 2227 } | |
| 2228 } else { | |
| 2229 // Unknown attribute | |
| 2230 cfs->skip_u1(attribute_length, CHECK); | |
| 2231 } | |
| 2232 } | |
| 2233 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
| 2234 runtime_visible_annotations_length, | |
| 2235 runtime_invisible_annotations, | |
| 2236 runtime_invisible_annotations_length, | |
| 2237 CHECK); | |
| 2238 k->set_class_annotations(annotations()); | |
| 2239 } | |
| 2240 | |
| 2241 | |
| 2242 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
| 2243 int runtime_visible_annotations_length, | |
| 2244 u1* runtime_invisible_annotations, | |
| 2245 int runtime_invisible_annotations_length, TRAPS) { | |
| 2246 typeArrayHandle annotations; | |
| 2247 if (runtime_visible_annotations != NULL || | |
| 2248 runtime_invisible_annotations != NULL) { | |
| 2249 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
| 2250 runtime_invisible_annotations_length, CHECK_(annotations)); | |
| 2251 annotations = typeArrayHandle(THREAD, anno); | |
| 2252 if (runtime_visible_annotations != NULL) { | |
| 2253 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
| 2254 } | |
| 2255 if (runtime_invisible_annotations != NULL) { | |
| 2256 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
| 2257 } | |
| 2258 } | |
| 2259 return annotations; | |
| 2260 } | |
| 2261 | |
| 2262 | |
| 2263 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
| 2264 KlassHandle h_k (THREAD, fd->field_holder()); | |
| 2265 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
| 2266 if (fd->has_initial_value()) { | |
| 2267 BasicType t = fd->field_type(); | |
| 2268 switch (t) { | |
| 2269 case T_BYTE: | |
| 2270 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
| 2271 break; | |
| 2272 case T_BOOLEAN: | |
| 2273 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
| 2274 break; | |
| 2275 case T_CHAR: | |
| 2276 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
| 2277 break; | |
| 2278 case T_SHORT: | |
| 2279 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
| 2280 break; | |
| 2281 case T_INT: | |
| 2282 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
| 2283 break; | |
| 2284 case T_FLOAT: | |
| 2285 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
| 2286 break; | |
| 2287 case T_DOUBLE: | |
| 2288 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
| 2289 break; | |
| 2290 case T_LONG: | |
| 2291 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
| 2292 break; | |
| 2293 case T_OBJECT: | |
| 2294 { | |
| 2295 #ifdef ASSERT | |
| 2296 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK); | |
| 2297 assert(fd->signature() == sym, "just checking"); | |
| 2298 #endif | |
| 2299 oop string = fd->string_initial_value(CHECK); | |
| 2300 h_k()->obj_field_put(fd->offset(), string); | |
| 2301 } | |
| 2302 break; | |
| 2303 default: | |
| 2304 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
| 2305 "Illegal ConstantValue attribute in class file"); | |
| 2306 } | |
| 2307 } | |
| 2308 } | |
| 2309 | |
| 2310 | |
| 2311 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
| 2312 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2313 // This code is for compatibility with earlier jdk's that do not | |
| 2314 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
| 2315 // the check for the "discovered" field should issue a warning if | |
| 2316 // the field is not found. For 1.6 this code should be issue a | |
| 2317 // fatal error if the "discovered" field is not found. | |
| 2318 // | |
| 2319 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2320 // next type of non-static oops leaves room for the fake oop. | |
| 2321 // Do not increment next_nonstatic_oop_offset so that the | |
| 2322 // fake oop is place after the java.lang.ref.Reference oop | |
| 2323 // fields. | |
| 2324 // | |
| 2325 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2326 // field. If it is not present, artifically create a field for it. | |
| 2327 // This allows this VM to run on early JDK where the field is not | |
| 2328 // present. | |
| 2329 | |
| 2330 // | |
| 2331 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2332 // next type of non-static oops leaves room for the fake oop. | |
| 2333 // Do not increment next_nonstatic_oop_offset so that the | |
| 2334 // fake oop is place after the java.lang.ref.Reference oop | |
| 2335 // fields. | |
| 2336 // | |
| 2337 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2338 // field. If it is not present, artifically create a field for it. | |
| 2339 // This allows this VM to run on early JDK where the field is not | |
| 2340 // present. | |
| 2341 int reference_sig_index = 0; | |
| 2342 int reference_name_index = 0; | |
| 2343 int reference_index = 0; | |
| 2344 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
| 2345 const int n = (*fields_ptr)()->length(); | |
| 2346 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
| 2347 int name_index = | |
| 2348 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
| 2349 int sig_index = | |
| 2350 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
| 2351 symbolOop f_name = cp->symbol_at(name_index); | |
| 2352 symbolOop f_sig = cp->symbol_at(sig_index); | |
| 2353 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { | |
| 2354 // Save the index for reference signature for later use. | |
| 2355 // The fake discovered field does not entries in the | |
| 2356 // constant pool so the index for its signature cannot | |
| 2357 // be extracted from the constant pool. It will need | |
| 2358 // later, however. It's signature is vmSymbols::reference_signature() | |
| 2359 // so same an index for that signature. | |
| 2360 reference_sig_index = sig_index; | |
| 2361 reference_name_index = name_index; | |
| 2362 reference_index = i; | |
| 2363 } | |
| 2364 if (f_name == vmSymbols::reference_discovered_name() && | |
| 2365 f_sig == vmSymbols::reference_signature()) { | |
| 2366 // The values below are fake but will force extra | |
| 2367 // non-static oop fields and a corresponding non-static | |
| 2368 // oop map block to be allocated. | |
| 2369 extra = 0; | |
| 2370 break; | |
| 2371 } | |
| 2372 } | |
| 2373 if (extra != 0) { | |
| 2374 fac_ptr->nonstatic_oop_count += extra; | |
| 2375 // Add the additional entry to "fields" so that the klass | |
| 2376 // contains the "discoverd" field and the field will be initialized | |
| 2377 // in instances of the object. | |
| 2378 int fields_with_fix_length = (*fields_ptr)()->length() + | |
| 2379 instanceKlass::next_offset; | |
| 2380 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
| 2381 fields_with_fix_length, CHECK); | |
| 2382 typeArrayHandle fields_with_fix(THREAD, ff); | |
| 2383 | |
| 2384 // Take everything from the original but the length. | |
| 2385 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
| 2386 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
| 2387 } | |
| 2388 | |
| 2389 // Add the fake field at the end. | |
| 2390 int i = (*fields_ptr)->length(); | |
| 2391 // There is no name index for the fake "discovered" field nor | |
| 2392 // signature but a signature is needed so that the field will | |
| 2393 // be properly initialized. Use one found for | |
| 2394 // one of the other reference fields. Be sure the index for the | |
| 2395 // name is 0. In fieldDescriptor::initialize() the index of the | |
| 2396 // name is checked. That check is by passed for the last nonstatic | |
| 2397 // oop field in a java.lang.ref.Reference which is assumed to be | |
| 2398 // this artificial "discovered" field. An assertion checks that | |
| 2399 // the name index is 0. | |
| 2400 assert(reference_index != 0, "Missing signature for reference"); | |
| 2401 | |
| 2402 int j; | |
| 2403 for (j = 0; j < instanceKlass::next_offset; j++) { | |
| 2404 fields_with_fix->ushort_at_put(i + j, | |
| 2405 (*fields_ptr)->ushort_at(reference_index +j)); | |
| 2406 } | |
| 2407 // Clear the public access flag and set the private access flag. | |
| 2408 short flags; | |
| 2409 flags = | |
| 2410 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
| 2411 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
| 2412 flags = flags & (~JVM_ACC_PUBLIC); | |
| 2413 flags = flags | JVM_ACC_PRIVATE; | |
| 2414 AccessFlags access_flags; | |
| 2415 access_flags.set_flags(flags); | |
| 2416 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
| 2417 assert(access_flags.is_private(), "Failed to set private flag"); | |
| 2418 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
| 2419 flags); | |
| 2420 | |
| 2421 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
| 2422 == reference_name_index, "The fake reference name is incorrect"); | |
| 2423 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
| 2424 == reference_sig_index, "The fake reference signature is incorrect"); | |
| 2425 // The type of the field is stored in the low_offset entry during | |
| 2426 // parsing. | |
| 2427 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
| 2428 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
| 2429 | |
| 2430 // "fields" is allocated in the permanent generation. Disgard | |
| 2431 // it and let it be collected. | |
| 2432 (*fields_ptr) = fields_with_fix; | |
| 2433 } | |
| 2434 return; | |
| 2435 } | |
| 2436 | |
| 2437 | |
| 2438 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
| 2439 FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2440 // Add fake fields for java.lang.Class instances | |
| 2441 // | |
| 2442 // This is not particularly nice. We should consider adding a | |
| 2443 // private transient object field at the Java level to | |
| 2444 // java.lang.Class. Alternatively we could add a subclass of | |
| 2445 // instanceKlass which provides an accessor and size computer for | |
| 2446 // this field, but that appears to be more code than this hack. | |
| 2447 // | |
| 2448 // NOTE that we wedge these in at the beginning rather than the | |
| 2449 // end of the object because the Class layout changed between JDK | |
| 2450 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
| 2451 // nonstatic oop fields were added at the Java level. The offsets | |
| 2452 // of these fake fields can't change between these two JDK | |
| 2453 // versions because when the offsets are computed at bootstrap | |
| 2454 // time we don't know yet which version of the JDK we're running in. | |
| 2455 | |
| 2456 // The values below are fake but will force two non-static oop fields and | |
| 2457 // a corresponding non-static oop map block to be allocated. | |
| 2458 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
| 2459 fac_ptr->nonstatic_oop_count += extra; | |
| 2460 } | |
| 2461 | |
| 2462 | |
| 2463 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
| 2464 // Cause the extra fake fields in java.lang.Class to show up before | |
| 2465 // the Java fields for layout compatibility between 1.3 and 1.4 | |
| 2466 // Incrementing next_nonstatic_oop_offset here advances the | |
| 2467 // location where the real java fields are placed. | |
| 2468 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
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2469 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
| 0 | 2470 } |
| 2471 | |
| 2472 | |
| 710 | 2473 // Force MethodHandle.vmentry to be an unmanaged pointer. |
| 2474 // There is no way for a classfile to express this, so we must help it. | |
| 2475 void ClassFileParser::java_dyn_MethodHandle_fix_pre(constantPoolHandle cp, | |
| 2476 typeArrayHandle* fields_ptr, | |
| 2477 FieldAllocationCount *fac_ptr, | |
| 2478 TRAPS) { | |
| 2479 // Add fake fields for java.dyn.MethodHandle instances | |
| 2480 // | |
| 2481 // This is not particularly nice, but since there is no way to express | |
| 2482 // a native wordSize field in Java, we must do it at this level. | |
| 2483 | |
| 2484 if (!EnableMethodHandles) return; | |
| 2485 | |
| 2486 int word_sig_index = 0; | |
| 2487 const int cp_size = cp->length(); | |
| 2488 for (int index = 1; index < cp_size; index++) { | |
| 2489 if (cp->tag_at(index).is_utf8() && | |
| 2490 cp->symbol_at(index) == vmSymbols::machine_word_signature()) { | |
| 2491 word_sig_index = index; | |
| 2492 break; | |
| 2493 } | |
| 2494 } | |
| 2495 | |
| 2496 if (word_sig_index == 0) | |
| 2497 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
| 2498 "missing I or J signature (for vmentry) in java.dyn.MethodHandle"); | |
| 2499 | |
| 2500 bool found_vmentry = false; | |
| 2501 | |
| 2502 const int n = (*fields_ptr)()->length(); | |
| 2503 for (int i = 0; i < n; i += instanceKlass::next_offset) { | |
| 2504 int name_index = (*fields_ptr)->ushort_at(i + instanceKlass::name_index_offset); | |
| 2505 int sig_index = (*fields_ptr)->ushort_at(i + instanceKlass::signature_index_offset); | |
| 2506 int acc_flags = (*fields_ptr)->ushort_at(i + instanceKlass::access_flags_offset); | |
| 2507 symbolOop f_name = cp->symbol_at(name_index); | |
| 2508 symbolOop f_sig = cp->symbol_at(sig_index); | |
| 2509 if (f_sig == vmSymbols::byte_signature() && | |
| 2510 f_name == vmSymbols::vmentry_name() && | |
| 2511 (acc_flags & JVM_ACC_STATIC) == 0) { | |
| 2512 // Adjust the field type from byte to an unmanaged pointer. | |
| 2513 assert(fac_ptr->nonstatic_byte_count > 0, ""); | |
| 2514 fac_ptr->nonstatic_byte_count -= 1; | |
| 2515 (*fields_ptr)->ushort_at_put(i + instanceKlass::signature_index_offset, | |
| 2516 word_sig_index); | |
| 2517 if (wordSize == jintSize) { | |
| 2518 fac_ptr->nonstatic_word_count += 1; | |
| 2519 } else { | |
| 2520 fac_ptr->nonstatic_double_count += 1; | |
| 2521 } | |
| 2522 | |
| 2523 FieldAllocationType atype = (FieldAllocationType) (*fields_ptr)->ushort_at(i+4); | |
| 2524 assert(atype == NONSTATIC_BYTE, ""); | |
| 2525 FieldAllocationType new_atype = NONSTATIC_WORD; | |
| 2526 if (wordSize > jintSize) { | |
| 2527 if (Universe::field_type_should_be_aligned(T_LONG)) { | |
| 2528 atype = NONSTATIC_ALIGNED_DOUBLE; | |
| 2529 } else { | |
| 2530 atype = NONSTATIC_DOUBLE; | |
| 2531 } | |
| 2532 } | |
| 2533 (*fields_ptr)->ushort_at_put(i+4, new_atype); | |
| 2534 | |
| 2535 found_vmentry = true; | |
| 2536 break; | |
| 2537 } | |
| 2538 } | |
| 2539 | |
| 2540 if (!found_vmentry) | |
| 2541 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
| 2542 "missing vmentry byte field in java.dyn.MethodHandle"); | |
| 2543 | |
| 2544 } | |
| 2545 | |
| 2546 | |
| 0 | 2547 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name, |
| 2548 Handle class_loader, | |
| 2549 Handle protection_domain, | |
| 710 | 2550 KlassHandle host_klass, |
|
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2551 GrowableArray<Handle>* cp_patches, |
| 0 | 2552 symbolHandle& parsed_name, |
| 2553 TRAPS) { | |
| 2554 // So that JVMTI can cache class file in the state before retransformable agents | |
| 2555 // have modified it | |
| 2556 unsigned char *cached_class_file_bytes = NULL; | |
| 2557 jint cached_class_file_length; | |
| 2558 | |
| 2559 ClassFileStream* cfs = stream(); | |
| 2560 // Timing | |
| 2561 PerfTraceTime vmtimer(ClassLoader::perf_accumulated_time()); | |
| 2562 | |
| 2563 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
| 2564 | |
| 2565 if (JvmtiExport::should_post_class_file_load_hook()) { | |
| 2566 unsigned char* ptr = cfs->buffer(); | |
| 2567 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
| 2568 | |
| 2569 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
| 2570 &ptr, &end_ptr, | |
| 2571 &cached_class_file_bytes, | |
| 2572 &cached_class_file_length); | |
| 2573 | |
| 2574 if (ptr != cfs->buffer()) { | |
| 2575 // JVMTI agent has modified class file data. | |
| 2576 // Set new class file stream using JVMTI agent modified | |
| 2577 // class file data. | |
| 2578 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
| 2579 set_stream(cfs); | |
| 2580 } | |
| 2581 } | |
| 2582 | |
| 710 | 2583 _host_klass = host_klass; |
|
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2584 _cp_patches = cp_patches; |
| 0 | 2585 |
| 2586 instanceKlassHandle nullHandle; | |
| 2587 | |
| 2588 // Figure out whether we can skip format checking (matching classic VM behavior) | |
| 2589 _need_verify = Verifier::should_verify_for(class_loader()); | |
| 2590 | |
| 2591 // Set the verify flag in stream | |
| 2592 cfs->set_verify(_need_verify); | |
| 2593 | |
| 2594 // Save the class file name for easier error message printing. | |
| 2595 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name(); | |
| 2596 | |
| 2597 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
| 2598 // Magic value | |
| 2599 u4 magic = cfs->get_u4_fast(); | |
| 2600 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
| 2601 "Incompatible magic value %u in class file %s", | |
| 2602 magic, CHECK_(nullHandle)); | |
| 2603 | |
| 2604 // Version numbers | |
| 2605 u2 minor_version = cfs->get_u2_fast(); | |
| 2606 u2 major_version = cfs->get_u2_fast(); | |
| 2607 | |
| 2608 // Check version numbers - we check this even with verifier off | |
| 2609 if (!is_supported_version(major_version, minor_version)) { | |
| 2610 if (name.is_null()) { | |
| 2611 Exceptions::fthrow( | |
| 2612 THREAD_AND_LOCATION, | |
| 2613 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
| 2614 "Unsupported major.minor version %u.%u", | |
| 2615 major_version, | |
| 2616 minor_version); | |
| 2617 } else { | |
| 2618 ResourceMark rm(THREAD); | |
| 2619 Exceptions::fthrow( | |
| 2620 THREAD_AND_LOCATION, | |
| 2621 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
| 2622 "%s : Unsupported major.minor version %u.%u", | |
| 2623 name->as_C_string(), | |
| 2624 major_version, | |
| 2625 minor_version); | |
| 2626 } | |
| 2627 return nullHandle; | |
| 2628 } | |
| 2629 | |
| 2630 _major_version = major_version; | |
| 2631 _minor_version = minor_version; | |
| 2632 | |
| 2633 | |
| 2634 // Check if verification needs to be relaxed for this class file | |
| 2635 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
| 2636 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
| 2637 | |
| 2638 // Constant pool | |
| 2639 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
| 2640 int cp_size = cp->length(); | |
| 2641 | |
| 2642 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
| 2643 | |
| 2644 // Access flags | |
| 2645 AccessFlags access_flags; | |
| 2646 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
| 2647 | |
| 2648 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2649 // Set abstract bit for old class files for backward compatibility | |
| 2650 flags |= JVM_ACC_ABSTRACT; | |
| 2651 } | |
| 2652 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
| 2653 access_flags.set_flags(flags); | |
| 2654 | |
| 2655 // This class and superclass | |
| 2656 instanceKlassHandle super_klass; | |
| 2657 u2 this_class_index = cfs->get_u2_fast(); | |
| 2658 check_property( | |
| 2659 valid_cp_range(this_class_index, cp_size) && | |
| 2660 cp->tag_at(this_class_index).is_unresolved_klass(), | |
| 2661 "Invalid this class index %u in constant pool in class file %s", | |
| 2662 this_class_index, CHECK_(nullHandle)); | |
| 2663 | |
| 2664 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index)); | |
| 2665 assert(class_name.not_null(), "class_name can't be null"); | |
| 2666 | |
| 2667 // It's important to set parsed_name *before* resolving the super class. | |
| 2668 // (it's used for cleanup by the caller if parsing fails) | |
| 2669 parsed_name = class_name; | |
| 2670 | |
| 2671 // Update _class_name which could be null previously to be class_name | |
| 2672 _class_name = class_name; | |
| 2673 | |
| 2674 // Don't need to check whether this class name is legal or not. | |
| 2675 // It has been checked when constant pool is parsed. | |
| 2676 // However, make sure it is not an array type. | |
| 2677 if (_need_verify) { | |
| 2678 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 2679 "Bad class name in class file %s", | |
| 2680 CHECK_(nullHandle)); | |
| 2681 } | |
| 2682 | |
| 2683 klassOop preserve_this_klass; // for storing result across HandleMark | |
| 2684 | |
| 2685 // release all handles when parsing is done | |
| 2686 { HandleMark hm(THREAD); | |
| 2687 | |
| 2688 // Checks if name in class file matches requested name | |
| 2689 if (name.not_null() && class_name() != name()) { | |
| 2690 ResourceMark rm(THREAD); | |
| 2691 Exceptions::fthrow( | |
| 2692 THREAD_AND_LOCATION, | |
| 2693 vmSymbolHandles::java_lang_NoClassDefFoundError(), | |
| 2694 "%s (wrong name: %s)", | |
| 2695 name->as_C_string(), | |
| 2696 class_name->as_C_string() | |
| 2697 ); | |
| 2698 return nullHandle; | |
| 2699 } | |
| 2700 | |
| 2701 if (TraceClassLoadingPreorder) { | |
| 2702 tty->print("[Loading %s", name()->as_klass_external_name()); | |
| 2703 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); | |
| 2704 tty->print_cr("]"); | |
| 2705 } | |
| 2706 | |
| 2707 u2 super_class_index = cfs->get_u2_fast(); | |
| 2708 if (super_class_index == 0) { | |
| 2709 check_property(class_name() == vmSymbols::java_lang_Object(), | |
| 2710 "Invalid superclass index %u in class file %s", | |
| 2711 super_class_index, | |
| 2712 CHECK_(nullHandle)); | |
| 2713 } else { | |
| 2714 check_property(valid_cp_range(super_class_index, cp_size) && | |
|
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2715 is_klass_reference(cp, super_class_index), |
| 0 | 2716 "Invalid superclass index %u in class file %s", |
| 2717 super_class_index, | |
| 2718 CHECK_(nullHandle)); | |
| 2719 // The class name should be legal because it is checked when parsing constant pool. | |
| 2720 // However, make sure it is not an array type. | |
|
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2721 bool is_array = false; |
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2722 if (cp->tag_at(super_class_index).is_klass()) { |
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2723 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index)); |
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2724 if (_need_verify) |
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2725 is_array = super_klass->oop_is_array(); |
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2726 } else if (_need_verify) { |
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2727 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); |
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2728 } |
| 0 | 2729 if (_need_verify) { |
|
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2730 guarantee_property(!is_array, |
| 0 | 2731 "Bad superclass name in class file %s", CHECK_(nullHandle)); |
| 2732 } | |
| 2733 } | |
| 2734 | |
| 2735 // Interfaces | |
| 2736 u2 itfs_len = cfs->get_u2_fast(); | |
| 2737 objArrayHandle local_interfaces; | |
| 2738 if (itfs_len == 0) { | |
| 2739 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 2740 } else { | |
| 2741 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, &vmtimer, _class_name, CHECK_(nullHandle)); | |
| 2742 } | |
| 2743 | |
| 2744 // Fields (offsets are filled in later) | |
| 2745 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
| 2746 objArrayHandle fields_annotations; | |
| 2747 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
| 2748 // Methods | |
| 2749 bool has_final_method = false; | |
| 2750 AccessFlags promoted_flags; | |
| 2751 promoted_flags.set_flags(0); | |
| 2752 // These need to be oop pointers because they are allocated lazily | |
| 2753 // inside parse_methods inside a nested HandleMark | |
| 2754 objArrayOop methods_annotations_oop = NULL; | |
| 2755 objArrayOop methods_parameter_annotations_oop = NULL; | |
| 2756 objArrayOop methods_default_annotations_oop = NULL; | |
| 2757 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
| 2758 &promoted_flags, | |
| 2759 &has_final_method, | |
| 2760 &methods_annotations_oop, | |
| 2761 &methods_parameter_annotations_oop, | |
| 2762 &methods_default_annotations_oop, | |
| 2763 CHECK_(nullHandle)); | |
| 2764 | |
| 2765 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
| 2766 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
| 2767 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
| 2768 | |
| 2769 // We check super class after class file is parsed and format is checked | |
|
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2770 if (super_class_index > 0 && super_klass.is_null()) { |
| 0 | 2771 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index)); |
| 2772 if (access_flags.is_interface()) { | |
| 2773 // Before attempting to resolve the superclass, check for class format | |
| 2774 // errors not checked yet. | |
| 2775 guarantee_property(sk() == vmSymbols::java_lang_Object(), | |
| 2776 "Interfaces must have java.lang.Object as superclass in class file %s", | |
| 2777 CHECK_(nullHandle)); | |
| 2778 } | |
| 2779 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
| 2780 sk, | |
| 2781 class_loader, | |
| 2782 protection_domain, | |
| 2783 true, | |
| 2784 CHECK_(nullHandle)); | |
| 2785 KlassHandle kh (THREAD, k); | |
| 2786 super_klass = instanceKlassHandle(THREAD, kh()); | |
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2787 if (LinkWellKnownClasses) // my super class is well known to me |
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2788 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve |
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2789 } |
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2790 if (super_klass.not_null()) { |
| 0 | 2791 if (super_klass->is_interface()) { |
| 2792 ResourceMark rm(THREAD); | |
| 2793 Exceptions::fthrow( | |
| 2794 THREAD_AND_LOCATION, | |
| 2795 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), | |
| 2796 "class %s has interface %s as super class", | |
| 2797 class_name->as_klass_external_name(), | |
| 2798 super_klass->external_name() | |
| 2799 ); | |
| 2800 return nullHandle; | |
| 2801 } | |
| 2802 // Make sure super class is not final | |
| 2803 if (super_klass->is_final()) { | |
| 2804 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
| 2805 } | |
| 2806 } | |
| 2807 | |
| 2808 // Compute the transitive list of all unique interfaces implemented by this class | |
| 2809 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
| 2810 | |
| 2811 // sort methods | |
| 2812 typeArrayHandle method_ordering = sort_methods(methods, | |
| 2813 methods_annotations, | |
| 2814 methods_parameter_annotations, | |
| 2815 methods_default_annotations, | |
| 2816 CHECK_(nullHandle)); | |
| 2817 | |
| 2818 // promote flags from parse_methods() to the klass' flags | |
| 2819 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
| 2820 | |
| 2821 // Size of Java vtable (in words) | |
| 2822 int vtable_size = 0; | |
| 2823 int itable_size = 0; | |
| 2824 int num_miranda_methods = 0; | |
| 2825 | |
| 2826 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
| 2827 num_miranda_methods, | |
| 2828 super_klass(), | |
| 2829 methods(), | |
| 2830 access_flags, | |
|
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2831 class_loader, |
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2832 class_name, |
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2833 local_interfaces(), |
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2834 CHECK_(nullHandle)); |
| 0 | 2835 |
| 2836 // Size of Java itable (in words) | |
| 2837 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
| 2838 | |
| 2839 // Field size and offset computation | |
| 2840 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
| 2841 #ifndef PRODUCT | |
| 2842 int orig_nonstatic_field_size = 0; | |
| 2843 #endif | |
| 2844 int static_field_size = 0; | |
| 2845 int next_static_oop_offset; | |
| 2846 int next_static_double_offset; | |
| 2847 int next_static_word_offset; | |
| 2848 int next_static_short_offset; | |
| 2849 int next_static_byte_offset; | |
| 2850 int next_static_type_offset; | |
| 2851 int next_nonstatic_oop_offset; | |
| 2852 int next_nonstatic_double_offset; | |
| 2853 int next_nonstatic_word_offset; | |
| 2854 int next_nonstatic_short_offset; | |
| 2855 int next_nonstatic_byte_offset; | |
| 2856 int next_nonstatic_type_offset; | |
| 2857 int first_nonstatic_oop_offset; | |
| 2858 int first_nonstatic_field_offset; | |
| 2859 int next_nonstatic_field_offset; | |
| 2860 | |
| 2861 // Calculate the starting byte offsets | |
| 2862 next_static_oop_offset = (instanceKlass::header_size() + | |
| 2863 align_object_offset(vtable_size) + | |
| 2864 align_object_offset(itable_size)) * wordSize; | |
| 2865 next_static_double_offset = next_static_oop_offset + | |
|
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2866 (fac.static_oop_count * heapOopSize); |
| 0 | 2867 if ( fac.static_double_count && |
| 2868 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
| 2869 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
| 2870 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
| 2871 } | |
| 2872 | |
| 2873 next_static_word_offset = next_static_double_offset + | |
| 2874 (fac.static_double_count * BytesPerLong); | |
| 2875 next_static_short_offset = next_static_word_offset + | |
| 2876 (fac.static_word_count * BytesPerInt); | |
| 2877 next_static_byte_offset = next_static_short_offset + | |
| 2878 (fac.static_short_count * BytesPerShort); | |
| 2879 next_static_type_offset = align_size_up((next_static_byte_offset + | |
| 2880 fac.static_byte_count ), wordSize ); | |
| 2881 static_field_size = (next_static_type_offset - | |
| 2882 next_static_oop_offset) / wordSize; | |
|
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2883 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + |
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2884 nonstatic_field_size * heapOopSize; |
| 0 | 2885 next_nonstatic_field_offset = first_nonstatic_field_offset; |
| 2886 | |
| 2887 // Add fake fields for java.lang.Class instances (also see below) | |
| 2888 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
| 2889 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); | |
| 2890 } | |
| 2891 | |
| 710 | 2892 // adjust the vmentry field declaration in java.dyn.MethodHandle |
| 2893 if (EnableMethodHandles && class_name() == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) { | |
| 2894 java_dyn_MethodHandle_fix_pre(cp, &fields, &fac, CHECK_(nullHandle)); | |
| 2895 } | |
| 2896 | |
| 0 | 2897 // Add a fake "discovered" field if it is not present |
| 2898 // for compatibility with earlier jdk's. | |
| 2899 if (class_name() == vmSymbols::java_lang_ref_Reference() | |
| 2900 && class_loader.is_null()) { | |
| 2901 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
| 2902 } | |
| 2903 // end of "discovered" field compactibility fix | |
| 2904 | |
| 2905 int nonstatic_double_count = fac.nonstatic_double_count; | |
| 2906 int nonstatic_word_count = fac.nonstatic_word_count; | |
| 2907 int nonstatic_short_count = fac.nonstatic_short_count; | |
| 2908 int nonstatic_byte_count = fac.nonstatic_byte_count; | |
| 2909 int nonstatic_oop_count = fac.nonstatic_oop_count; | |
| 2910 | |
|
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2911 bool super_has_nonstatic_fields = |
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2912 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
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2913 bool has_nonstatic_fields = super_has_nonstatic_fields || |
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2914 ((nonstatic_double_count + nonstatic_word_count + |
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2915 nonstatic_short_count + nonstatic_byte_count + |
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2916 nonstatic_oop_count) != 0); |
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2917 |
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2918 |
| 0 | 2919 // Prepare list of oops for oop maps generation. |
| 2920 u2* nonstatic_oop_offsets; | |
| 2921 u2* nonstatic_oop_length; | |
| 2922 int nonstatic_oop_map_count = 0; | |
| 2923 | |
| 2924 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 2925 THREAD, u2, nonstatic_oop_count+1); | |
| 2926 nonstatic_oop_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 2927 THREAD, u2, nonstatic_oop_count+1); | |
| 2928 | |
| 2929 // Add fake fields for java.lang.Class instances (also see above). | |
| 2930 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
| 2931 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
| 2932 java_lang_Class_fix_post(&next_nonstatic_field_offset); | |
| 2933 nonstatic_oop_offsets[0] = (u2)first_nonstatic_field_offset; | |
| 2934 int fake_oop_count = (( next_nonstatic_field_offset - | |
|
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2935 first_nonstatic_field_offset ) / heapOopSize); |
| 0 | 2936 nonstatic_oop_length [0] = (u2)fake_oop_count; |
| 2937 nonstatic_oop_map_count = 1; | |
| 2938 nonstatic_oop_count -= fake_oop_count; | |
| 2939 first_nonstatic_oop_offset = first_nonstatic_field_offset; | |
| 2940 } else { | |
| 2941 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
| 2942 } | |
| 2943 | |
| 2944 #ifndef PRODUCT | |
| 2945 if( PrintCompactFieldsSavings ) { | |
| 2946 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
|
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2947 (nonstatic_oop_count * heapOopSize); |
| 0 | 2948 if ( nonstatic_double_count > 0 ) { |
| 2949 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
| 2950 } | |
| 2951 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 2952 (nonstatic_double_count * BytesPerLong); | |
| 2953 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 2954 (nonstatic_word_count * BytesPerInt); | |
| 2955 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 2956 (nonstatic_short_count * BytesPerShort); | |
| 2957 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
|
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2958 nonstatic_byte_count ), heapOopSize ); |
| 0 | 2959 orig_nonstatic_field_size = nonstatic_field_size + |
|
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2960 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); |
| 0 | 2961 } |
| 2962 #endif | |
| 2963 bool compact_fields = CompactFields; | |
| 2964 int allocation_style = FieldsAllocationStyle; | |
| 2965 if( allocation_style < 0 || allocation_style > 1 ) { // Out of range? | |
| 2966 assert(false, "0 <= FieldsAllocationStyle <= 1"); | |
| 2967 allocation_style = 1; // Optimistic | |
| 2968 } | |
| 2969 | |
| 2970 // The next classes have predefined hard-coded fields offsets | |
| 2971 // (see in JavaClasses::compute_hard_coded_offsets()). | |
| 2972 // Use default fields allocation order for them. | |
| 2973 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
| 2974 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() || | |
| 2975 class_name() == vmSymbols::java_lang_Class() || | |
| 2976 class_name() == vmSymbols::java_lang_ClassLoader() || | |
| 2977 class_name() == vmSymbols::java_lang_ref_Reference() || | |
| 2978 class_name() == vmSymbols::java_lang_ref_SoftReference() || | |
| 2979 class_name() == vmSymbols::java_lang_StackTraceElement() || | |
| 2980 class_name() == vmSymbols::java_lang_String() || | |
|
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2981 class_name() == vmSymbols::java_lang_Throwable() || |
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2982 class_name() == vmSymbols::java_lang_Boolean() || |
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2983 class_name() == vmSymbols::java_lang_Character() || |
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2984 class_name() == vmSymbols::java_lang_Float() || |
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2985 class_name() == vmSymbols::java_lang_Double() || |
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2986 class_name() == vmSymbols::java_lang_Byte() || |
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2987 class_name() == vmSymbols::java_lang_Short() || |
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2988 class_name() == vmSymbols::java_lang_Integer() || |
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2989 class_name() == vmSymbols::java_lang_Long())) { |
| 0 | 2990 allocation_style = 0; // Allocate oops first |
| 2991 compact_fields = false; // Don't compact fields | |
| 2992 } | |
| 2993 | |
| 2994 if( allocation_style == 0 ) { | |
| 2995 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
| 2996 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
| 2997 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
|
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2998 (nonstatic_oop_count * heapOopSize); |
| 0 | 2999 } else if( allocation_style == 1 ) { |
| 3000 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
| 3001 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
| 3002 } else { | |
| 3003 ShouldNotReachHere(); | |
| 3004 } | |
| 3005 | |
| 3006 int nonstatic_oop_space_count = 0; | |
| 3007 int nonstatic_word_space_count = 0; | |
| 3008 int nonstatic_short_space_count = 0; | |
| 3009 int nonstatic_byte_space_count = 0; | |
| 3010 int nonstatic_oop_space_offset; | |
| 3011 int nonstatic_word_space_offset; | |
| 3012 int nonstatic_short_space_offset; | |
| 3013 int nonstatic_byte_space_offset; | |
| 3014 | |
|
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3015 if( nonstatic_double_count > 0 ) { |
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3016 int offset = next_nonstatic_double_offset; |
| 0 | 3017 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
| 3018 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
| 3019 // Allocate available fields into the gap before double field. | |
| 3020 int length = next_nonstatic_double_offset - offset; | |
| 3021 assert(length == BytesPerInt, ""); | |
| 3022 nonstatic_word_space_offset = offset; | |
| 3023 if( nonstatic_word_count > 0 ) { | |
| 3024 nonstatic_word_count -= 1; | |
| 3025 nonstatic_word_space_count = 1; // Only one will fit | |
| 3026 length -= BytesPerInt; | |
| 3027 offset += BytesPerInt; | |
| 3028 } | |
| 3029 nonstatic_short_space_offset = offset; | |
| 3030 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
| 3031 nonstatic_short_count -= 1; | |
| 3032 nonstatic_short_space_count += 1; | |
| 3033 length -= BytesPerShort; | |
| 3034 offset += BytesPerShort; | |
| 3035 } | |
| 3036 nonstatic_byte_space_offset = offset; | |
| 3037 while( length > 0 && nonstatic_byte_count > 0 ) { | |
| 3038 nonstatic_byte_count -= 1; | |
| 3039 nonstatic_byte_space_count += 1; | |
| 3040 length -= 1; | |
| 3041 } | |
| 3042 // Allocate oop field in the gap if there are no other fields for that. | |
| 3043 nonstatic_oop_space_offset = offset; | |
|
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3044 if( length >= heapOopSize && nonstatic_oop_count > 0 && |
| 0 | 3045 allocation_style != 0 ) { // when oop fields not first |
| 3046 nonstatic_oop_count -= 1; | |
| 3047 nonstatic_oop_space_count = 1; // Only one will fit | |
|
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3048 length -= heapOopSize; |
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3049 offset += heapOopSize; |
| 0 | 3050 } |
| 3051 } | |
| 3052 } | |
| 3053 | |
| 3054 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 3055 (nonstatic_double_count * BytesPerLong); | |
| 3056 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 3057 (nonstatic_word_count * BytesPerInt); | |
| 3058 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 3059 (nonstatic_short_count * BytesPerShort); | |
| 3060 | |
| 3061 int notaligned_offset; | |
| 3062 if( allocation_style == 0 ) { | |
| 3063 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 3064 } else { // allocation_style == 1 | |
| 3065 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 3066 if( nonstatic_oop_count > 0 ) { | |
|
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3067 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
| 0 | 3068 } |
|
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3069 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
| 0 | 3070 } |
|
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3071 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); |
| 0 | 3072 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset |
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3073 - first_nonstatic_field_offset)/heapOopSize); |
| 0 | 3074 |
| 3075 // Iterate over fields again and compute correct offsets. | |
| 3076 // The field allocation type was temporarily stored in the offset slot. | |
| 3077 // oop fields are located before non-oop fields (static and non-static). | |
| 3078 int len = fields->length(); | |
| 3079 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
| 3080 int real_offset; | |
| 3081 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i+4); | |
| 3082 switch (atype) { | |
| 3083 case STATIC_OOP: | |
| 3084 real_offset = next_static_oop_offset; | |
|
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3085 next_static_oop_offset += heapOopSize; |
| 0 | 3086 break; |
| 3087 case STATIC_BYTE: | |
| 3088 real_offset = next_static_byte_offset; | |
| 3089 next_static_byte_offset += 1; | |
| 3090 break; | |
| 3091 case STATIC_SHORT: | |
| 3092 real_offset = next_static_short_offset; | |
| 3093 next_static_short_offset += BytesPerShort; | |
| 3094 break; | |
| 3095 case STATIC_WORD: | |
| 3096 real_offset = next_static_word_offset; | |
| 3097 next_static_word_offset += BytesPerInt; | |
| 3098 break; | |
| 3099 case STATIC_ALIGNED_DOUBLE: | |
| 3100 case STATIC_DOUBLE: | |
| 3101 real_offset = next_static_double_offset; | |
| 3102 next_static_double_offset += BytesPerLong; | |
| 3103 break; | |
| 3104 case NONSTATIC_OOP: | |
| 3105 if( nonstatic_oop_space_count > 0 ) { | |
| 3106 real_offset = nonstatic_oop_space_offset; | |
|
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3107 nonstatic_oop_space_offset += heapOopSize; |
| 0 | 3108 nonstatic_oop_space_count -= 1; |
| 3109 } else { | |
| 3110 real_offset = next_nonstatic_oop_offset; | |
|
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3111 next_nonstatic_oop_offset += heapOopSize; |
| 0 | 3112 } |
| 3113 // Update oop maps | |
| 3114 if( nonstatic_oop_map_count > 0 && | |
| 3115 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
|
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3116 (u2)(real_offset - nonstatic_oop_length[nonstatic_oop_map_count - 1] * heapOopSize) ) { |
| 0 | 3117 // Extend current oop map |
| 3118 nonstatic_oop_length[nonstatic_oop_map_count - 1] += 1; | |
| 3119 } else { | |
| 3120 // Create new oop map | |
| 3121 nonstatic_oop_offsets[nonstatic_oop_map_count] = (u2)real_offset; | |
| 3122 nonstatic_oop_length [nonstatic_oop_map_count] = 1; | |
| 3123 nonstatic_oop_map_count += 1; | |
| 3124 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
| 3125 first_nonstatic_oop_offset = real_offset; | |
| 3126 } | |
| 3127 } | |
| 3128 break; | |
| 3129 case NONSTATIC_BYTE: | |
| 3130 if( nonstatic_byte_space_count > 0 ) { | |
| 3131 real_offset = nonstatic_byte_space_offset; | |
| 3132 nonstatic_byte_space_offset += 1; | |
| 3133 nonstatic_byte_space_count -= 1; | |
| 3134 } else { | |
| 3135 real_offset = next_nonstatic_byte_offset; | |
| 3136 next_nonstatic_byte_offset += 1; | |
| 3137 } | |
| 3138 break; | |
| 3139 case NONSTATIC_SHORT: | |
| 3140 if( nonstatic_short_space_count > 0 ) { | |
| 3141 real_offset = nonstatic_short_space_offset; | |
| 3142 nonstatic_short_space_offset += BytesPerShort; | |
| 3143 nonstatic_short_space_count -= 1; | |
| 3144 } else { | |
| 3145 real_offset = next_nonstatic_short_offset; | |
| 3146 next_nonstatic_short_offset += BytesPerShort; | |
| 3147 } | |
| 3148 break; | |
| 3149 case NONSTATIC_WORD: | |
| 3150 if( nonstatic_word_space_count > 0 ) { | |
| 3151 real_offset = nonstatic_word_space_offset; | |
| 3152 nonstatic_word_space_offset += BytesPerInt; | |
| 3153 nonstatic_word_space_count -= 1; | |
| 3154 } else { | |
| 3155 real_offset = next_nonstatic_word_offset; | |
| 3156 next_nonstatic_word_offset += BytesPerInt; | |
| 3157 } | |
| 3158 break; | |
| 3159 case NONSTATIC_ALIGNED_DOUBLE: | |
| 3160 case NONSTATIC_DOUBLE: | |
| 3161 real_offset = next_nonstatic_double_offset; | |
| 3162 next_nonstatic_double_offset += BytesPerLong; | |
| 3163 break; | |
| 3164 default: | |
| 3165 ShouldNotReachHere(); | |
| 3166 } | |
| 3167 fields->short_at_put(i+4, extract_low_short_from_int(real_offset) ); | |
| 3168 fields->short_at_put(i+5, extract_high_short_from_int(real_offset) ); | |
| 3169 } | |
| 3170 | |
| 3171 // Size of instances | |
| 3172 int instance_size; | |
| 3173 | |
|
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|
3174 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); |
| 0 | 3175 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); |
| 3176 | |
|
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3177 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 | 3178 |
| 3179 // Size of non-static oop map blocks (in words) allocated at end of klass | |
| 3180 int nonstatic_oop_map_size = compute_oop_map_size(super_klass, nonstatic_oop_map_count, first_nonstatic_oop_offset); | |
| 3181 | |
| 3182 // Compute reference type | |
| 3183 ReferenceType rt; | |
| 3184 if (super_klass() == NULL) { | |
| 3185 rt = REF_NONE; | |
| 3186 } else { | |
| 3187 rt = super_klass->reference_type(); | |
| 3188 } | |
| 3189 | |
| 3190 // We can now create the basic klassOop for this klass | |
| 3191 klassOop ik = oopFactory::new_instanceKlass( | |
| 3192 vtable_size, itable_size, | |
| 3193 static_field_size, nonstatic_oop_map_size, | |
| 3194 rt, CHECK_(nullHandle)); | |
| 3195 instanceKlassHandle this_klass (THREAD, ik); | |
| 3196 | |
| 3197 assert(this_klass->static_field_size() == static_field_size && | |
| 3198 this_klass->nonstatic_oop_map_size() == nonstatic_oop_map_size, "sanity check"); | |
| 3199 | |
| 3200 // Fill in information already parsed | |
| 3201 this_klass->set_access_flags(access_flags); | |
| 3202 jint lh = Klass::instance_layout_helper(instance_size, false); | |
| 3203 this_klass->set_layout_helper(lh); | |
| 3204 assert(this_klass->oop_is_instance(), "layout is correct"); | |
| 3205 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
| 3206 // Not yet: supers are done below to support the new subtype-checking fields | |
| 3207 //this_klass->set_super(super_klass()); | |
| 3208 this_klass->set_class_loader(class_loader()); | |
| 3209 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
|
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|
3210 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
| 0 | 3211 this_klass->set_static_oop_field_size(fac.static_oop_count); |
| 3212 cp->set_pool_holder(this_klass()); | |
| 3213 this_klass->set_constants(cp()); | |
| 3214 this_klass->set_local_interfaces(local_interfaces()); | |
| 3215 this_klass->set_fields(fields()); | |
| 3216 this_klass->set_methods(methods()); | |
| 3217 if (has_final_method) { | |
| 3218 this_klass->set_has_final_method(); | |
| 3219 } | |
| 3220 this_klass->set_method_ordering(method_ordering()); | |
| 3221 this_klass->set_initial_method_idnum(methods->length()); | |
| 3222 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
| 710 | 3223 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself |
|
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|
3224 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve |
| 0 | 3225 this_klass->set_protection_domain(protection_domain()); |
| 3226 this_klass->set_fields_annotations(fields_annotations()); | |
| 3227 this_klass->set_methods_annotations(methods_annotations()); | |
| 3228 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
| 3229 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
| 3230 | |
| 3231 this_klass->set_minor_version(minor_version); | |
| 3232 this_klass->set_major_version(major_version); | |
| 3233 | |
|
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|
3234 // Set up methodOop::intrinsic_id as soon as we know the names of methods. |
|
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diff
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|
3235 // (We used to do this lazily, but now we query it in Rewriter, |
|
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|
3236 // which is eagerly done for every method, so we might as well do it now, |
|
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diff
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|
3237 // when everything is fresh in memory.) |
|
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diff
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|
3238 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) { |
|
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diff
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|
3239 for (int j = 0; j < methods->length(); j++) { |
|
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diff
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|
3240 ((methodOop)methods->obj_at(j))->init_intrinsic_id(); |
|
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jrose
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diff
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|
3241 } |
|
75596850f863
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diff
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|
3242 } |
|
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|
3243 |
| 0 | 3244 if (cached_class_file_bytes != NULL) { |
| 3245 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
| 3246 this_klass->set_cached_class_file(cached_class_file_bytes, | |
| 3247 cached_class_file_length); | |
| 3248 } | |
| 3249 | |
| 3250 // Miranda methods | |
| 3251 if ((num_miranda_methods > 0) || | |
| 3252 // if this class introduced new miranda methods or | |
| 3253 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
| 3254 // super class exists and this class inherited miranda methods | |
| 3255 ) { | |
| 3256 this_klass->set_has_miranda_methods(); // then set a flag | |
| 3257 } | |
| 3258 | |
| 3259 // Additional attributes | |
| 3260 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
| 3261 | |
| 3262 // Make sure this is the end of class file stream | |
| 3263 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
| 3264 | |
| 3265 // Initialize static fields | |
| 3266 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
| 3267 | |
| 3268 // VerifyOops believes that once this has been set, the object is completely loaded. | |
| 3269 // Compute transitive closure of interfaces this class implements | |
| 3270 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
| 3271 | |
| 3272 // Fill in information needed to compute superclasses. | |
| 3273 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
| 3274 | |
| 3275 // Initialize itable offset tables | |
| 3276 klassItable::setup_itable_offset_table(this_klass); | |
| 3277 | |
| 3278 // Do final class setup | |
| 3279 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_length); | |
| 3280 | |
| 3281 set_precomputed_flags(this_klass); | |
| 3282 | |
| 3283 // reinitialize modifiers, using the InnerClasses attribute | |
| 3284 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
| 3285 this_klass->set_modifier_flags(computed_modifiers); | |
| 3286 | |
| 3287 // check if this class can access its super class | |
| 3288 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
| 3289 | |
| 3290 // check if this class can access its superinterfaces | |
| 3291 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
| 3292 | |
| 3293 // check if this class overrides any final method | |
| 3294 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
| 3295 | |
| 3296 // check that if this class is an interface then it doesn't have static methods | |
| 3297 if (this_klass->is_interface()) { | |
| 3298 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
| 3299 } | |
| 3300 | |
| 3301 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
| 3302 false /* not shared class */); | |
| 3303 | |
| 3304 if (TraceClassLoading) { | |
| 3305 // print in a single call to reduce interleaving of output | |
| 3306 if (cfs->source() != NULL) { | |
| 3307 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3308 cfs->source()); | |
| 3309 } else if (class_loader.is_null()) { | |
| 3310 if (THREAD->is_Java_thread()) { | |
| 3311 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
| 3312 tty->print("[Loaded %s by instance of %s]\n", | |
| 3313 this_klass->external_name(), | |
| 3314 instanceKlass::cast(caller)->external_name()); | |
| 3315 } else { | |
| 3316 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
| 3317 } | |
| 3318 } else { | |
| 3319 ResourceMark rm; | |
| 3320 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3321 instanceKlass::cast(class_loader->klass())->external_name()); | |
| 3322 } | |
| 3323 } | |
| 3324 | |
| 3325 if (TraceClassResolution) { | |
| 3326 // print out the superclass. | |
| 3327 const char * from = Klass::cast(this_klass())->external_name(); | |
| 3328 if (this_klass->java_super() != NULL) { | |
|
657
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652
diff
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|
3329 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); |
| 0 | 3330 } |
| 3331 // print out each of the interface classes referred to by this class. | |
| 3332 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
| 3333 if (!local_interfaces.is_null()) { | |
| 3334 int length = local_interfaces->length(); | |
| 3335 for (int i = 0; i < length; i++) { | |
| 3336 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3337 instanceKlass* to_class = instanceKlass::cast(k); | |
| 3338 const char * to = to_class->external_name(); | |
|
657
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652
diff
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|
3339 tty->print("RESOLVE %s %s (interface)\n", from, to); |
| 0 | 3340 } |
| 3341 } | |
| 3342 } | |
| 3343 | |
| 3344 #ifndef PRODUCT | |
| 3345 if( PrintCompactFieldsSavings ) { | |
| 3346 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
|
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|
3347 tty->print("[Saved %d of %d bytes in %s]\n", |
|
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|
3348 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize, |
|
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|
3349 orig_nonstatic_field_size*heapOopSize, |
|
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|
3350 this_klass->external_name()); |
| 0 | 3351 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { |
|
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|
3352 tty->print("[Wasted %d over %d bytes in %s]\n", |
|
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|
3353 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize, |
|
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diff
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|
3354 orig_nonstatic_field_size*heapOopSize, |
|
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|
3355 this_klass->external_name()); |
| 0 | 3356 } |
| 3357 } | |
| 3358 #endif | |
| 3359 | |
| 3360 // preserve result across HandleMark | |
| 3361 preserve_this_klass = this_klass(); | |
| 3362 } | |
| 3363 | |
| 3364 // Create new handle outside HandleMark | |
| 3365 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
| 3366 debug_only(this_klass->as_klassOop()->verify();) | |
| 3367 | |
| 3368 return this_klass; | |
| 3369 } | |
| 3370 | |
| 3371 | |
| 3372 int ClassFileParser::compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_map_count, int first_nonstatic_oop_offset) { | |
| 3373 int map_size = super.is_null() ? 0 : super->nonstatic_oop_map_size(); | |
| 3374 if (nonstatic_oop_map_count > 0) { | |
| 3375 // We have oops to add to map | |
| 3376 if (map_size == 0) { | |
| 3377 map_size = nonstatic_oop_map_count; | |
| 3378 } else { | |
| 3379 // Check whether we should add a new map block or whether the last one can be extended | |
| 3380 OopMapBlock* first_map = super->start_of_nonstatic_oop_maps(); | |
| 3381 OopMapBlock* last_map = first_map + map_size - 1; | |
| 3382 | |
|
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|
3383 int next_offset = last_map->offset() + (last_map->length() * heapOopSize); |
| 0 | 3384 if (next_offset == first_nonstatic_oop_offset) { |
| 3385 // There is no gap bettwen superklass's last oop field and first | |
| 3386 // local oop field, merge maps. | |
| 3387 nonstatic_oop_map_count -= 1; | |
| 3388 } else { | |
| 3389 // Superklass didn't end with a oop field, add extra maps | |
| 3390 assert(next_offset<first_nonstatic_oop_offset, "just checking"); | |
| 3391 } | |
| 3392 map_size += nonstatic_oop_map_count; | |
| 3393 } | |
| 3394 } | |
| 3395 return map_size; | |
| 3396 } | |
| 3397 | |
| 3398 | |
| 3399 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
| 3400 int nonstatic_oop_map_count, | |
| 3401 u2* nonstatic_oop_offsets, u2* nonstatic_oop_length) { | |
| 3402 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); | |
| 3403 OopMapBlock* last_oop_map = this_oop_map + k->nonstatic_oop_map_size(); | |
| 3404 instanceKlass* super = k->superklass(); | |
| 3405 if (super != NULL) { | |
| 3406 int super_oop_map_size = super->nonstatic_oop_map_size(); | |
| 3407 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); | |
| 3408 // Copy maps from superklass | |
| 3409 while (super_oop_map_size-- > 0) { | |
| 3410 *this_oop_map++ = *super_oop_map++; | |
| 3411 } | |
| 3412 } | |
| 3413 if (nonstatic_oop_map_count > 0) { | |
| 3414 if (this_oop_map + nonstatic_oop_map_count > last_oop_map) { | |
| 3415 // Calculated in compute_oop_map_size() number of oop maps is less then | |
| 3416 // collected oop maps since there is no gap between superklass's last oop | |
| 3417 // field and first local oop field. Extend the last oop map copied | |
| 3418 // from the superklass instead of creating new one. | |
| 3419 nonstatic_oop_map_count--; | |
| 3420 nonstatic_oop_offsets++; | |
| 3421 this_oop_map--; | |
| 3422 this_oop_map->set_length(this_oop_map->length() + *nonstatic_oop_length++); | |
| 3423 this_oop_map++; | |
| 3424 } | |
| 3425 assert((this_oop_map + nonstatic_oop_map_count) == last_oop_map, "just checking"); | |
| 3426 // Add new map blocks, fill them | |
| 3427 while (nonstatic_oop_map_count-- > 0) { | |
| 3428 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
| 3429 this_oop_map->set_length(*nonstatic_oop_length++); | |
| 3430 this_oop_map++; | |
| 3431 } | |
| 3432 } | |
| 3433 } | |
| 3434 | |
| 3435 | |
| 3436 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
| 3437 klassOop super = k->super(); | |
| 3438 | |
| 3439 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
| 3440 // in which case we don't have to register objects as finalizable | |
| 3441 if (!_has_empty_finalizer) { | |
| 3442 if (_has_finalizer || | |
| 3443 (super != NULL && super->klass_part()->has_finalizer())) { | |
| 3444 k->set_has_finalizer(); | |
| 3445 } | |
| 3446 } | |
| 3447 | |
| 3448 #ifdef ASSERT | |
| 3449 bool f = false; | |
| 3450 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
| 3451 vmSymbols::void_method_signature()); | |
| 3452 if (m != NULL && !m->is_empty_method()) { | |
| 3453 f = true; | |
| 3454 } | |
| 3455 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
| 3456 #endif | |
| 3457 | |
| 3458 // Check if this klass supports the java.lang.Cloneable interface | |
| 3459 if (SystemDictionary::cloneable_klass_loaded()) { | |
| 3460 if (k->is_subtype_of(SystemDictionary::cloneable_klass())) { | |
| 3461 k->set_is_cloneable(); | |
| 3462 } | |
| 3463 } | |
| 3464 | |
| 3465 // Check if this klass has a vanilla default constructor | |
| 3466 if (super == NULL) { | |
| 3467 // java.lang.Object has empty default constructor | |
| 3468 k->set_has_vanilla_constructor(); | |
| 3469 } else { | |
| 3470 if (Klass::cast(super)->has_vanilla_constructor() && | |
| 3471 _has_vanilla_constructor) { | |
| 3472 k->set_has_vanilla_constructor(); | |
| 3473 } | |
| 3474 #ifdef ASSERT | |
| 3475 bool v = false; | |
| 3476 if (Klass::cast(super)->has_vanilla_constructor()) { | |
| 3477 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
| 3478 ), vmSymbols::void_method_signature()); | |
| 3479 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
| 3480 v = true; | |
| 3481 } | |
| 3482 } | |
| 3483 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
| 3484 #endif | |
| 3485 } | |
| 3486 | |
| 3487 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
| 3488 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
| 3489 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
| 3490 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
| 3491 || k->is_abstract() || k->is_interface() | |
| 3492 || (k->name() == vmSymbols::java_lang_Class() | |
| 3493 && k->class_loader() == NULL) | |
| 3494 || k->size_helper() >= FastAllocateSizeLimit) { | |
| 3495 // Forbid fast-path allocation. | |
| 3496 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
| 3497 k->set_layout_helper(lh); | |
| 3498 } | |
| 3499 } | |
| 3500 | |
| 3501 | |
| 3502 // utility method for appending and array with check for duplicates | |
| 3503 | |
| 3504 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
| 3505 // iterate over new interfaces | |
| 3506 for (int i = 0; i < ifs->length(); i++) { | |
| 3507 oop e = ifs->obj_at(i); | |
| 3508 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
| 3509 // check for duplicates | |
| 3510 bool duplicate = false; | |
| 3511 for (int j = 0; j < index; j++) { | |
| 3512 if (result->obj_at(j) == e) { | |
| 3513 duplicate = true; | |
| 3514 break; | |
| 3515 } | |
| 3516 } | |
| 3517 // add new interface | |
| 3518 if (!duplicate) { | |
| 3519 result->obj_at_put(index++, e); | |
| 3520 } | |
| 3521 } | |
| 3522 } | |
| 3523 | |
| 3524 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
| 3525 // Compute maximum size for transitive interfaces | |
| 3526 int max_transitive_size = 0; | |
| 3527 int super_size = 0; | |
| 3528 // Add superclass transitive interfaces size | |
| 3529 if (super.not_null()) { | |
| 3530 super_size = super->transitive_interfaces()->length(); | |
| 3531 max_transitive_size += super_size; | |
| 3532 } | |
| 3533 // Add local interfaces' super interfaces | |
| 3534 int local_size = local_ifs->length(); | |
| 3535 for (int i = 0; i < local_size; i++) { | |
| 3536 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3537 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
| 3538 } | |
| 3539 // Finally add local interfaces | |
| 3540 max_transitive_size += local_size; | |
| 3541 // Construct array | |
| 3542 objArrayHandle result; | |
| 3543 if (max_transitive_size == 0) { | |
| 3544 // no interfaces, use canonicalized array | |
| 3545 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 3546 } else if (max_transitive_size == super_size) { | |
| 3547 // no new local interfaces added, share superklass' transitive interface array | |
| 3548 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
| 3549 } else if (max_transitive_size == local_size) { | |
| 3550 // only local interfaces added, share local interface array | |
| 3551 result = local_ifs; | |
| 3552 } else { | |
| 3553 objArrayHandle nullHandle; | |
| 3554 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
| 3555 result = objArrayHandle(THREAD, new_objarray); | |
| 3556 int index = 0; | |
| 3557 // Copy down from superclass | |
| 3558 if (super.not_null()) { | |
| 3559 append_interfaces(result, index, super->transitive_interfaces()); | |
| 3560 } | |
| 3561 // Copy down from local interfaces' superinterfaces | |
| 3562 for (int i = 0; i < local_ifs->length(); i++) { | |
| 3563 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3564 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
| 3565 } | |
| 3566 // Finally add local interfaces | |
| 3567 append_interfaces(result, index, local_ifs()); | |
| 3568 | |
| 3569 // Check if duplicates were removed | |
| 3570 if (index != max_transitive_size) { | |
| 3571 assert(index < max_transitive_size, "just checking"); | |
| 3572 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
| 3573 for (int i = 0; i < index; i++) { | |
| 3574 oop e = result->obj_at(i); | |
| 3575 assert(e != NULL, "just checking"); | |
| 3576 new_result->obj_at_put(i, e); | |
| 3577 } | |
| 3578 result = objArrayHandle(THREAD, new_result); | |
| 3579 } | |
| 3580 } | |
| 3581 return result; | |
| 3582 } | |
| 3583 | |
| 3584 | |
| 3585 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3586 klassOop super = this_klass->super(); | |
| 3587 if ((super != NULL) && | |
| 3588 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
| 3589 ResourceMark rm(THREAD); | |
| 3590 Exceptions::fthrow( | |
| 3591 THREAD_AND_LOCATION, | |
| 3592 vmSymbolHandles::java_lang_IllegalAccessError(), | |
| 3593 "class %s cannot access its superclass %s", | |
| 3594 this_klass->external_name(), | |
| 3595 instanceKlass::cast(super)->external_name() | |
| 3596 ); | |
| 3597 return; | |
| 3598 } | |
| 3599 } | |
| 3600 | |
| 3601 | |
| 3602 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3603 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
| 3604 int lng = local_interfaces->length(); | |
| 3605 for (int i = lng - 1; i >= 0; i--) { | |
| 3606 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3607 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
| 3608 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
| 3609 ResourceMark rm(THREAD); | |
| 3610 Exceptions::fthrow( | |
| 3611 THREAD_AND_LOCATION, | |
| 3612 vmSymbolHandles::java_lang_IllegalAccessError(), | |
| 3613 "class %s cannot access its superinterface %s", | |
| 3614 this_klass->external_name(), | |
| 3615 instanceKlass::cast(k)->external_name() | |
| 3616 ); | |
| 3617 return; | |
| 3618 } | |
| 3619 } | |
| 3620 } | |
| 3621 | |
| 3622 | |
| 3623 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
| 3624 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3625 int num_methods = methods->length(); | |
| 3626 | |
| 3627 // go thru each method and check if it overrides a final method | |
| 3628 for (int index = 0; index < num_methods; index++) { | |
| 3629 methodOop m = (methodOop)methods->obj_at(index); | |
| 3630 | |
| 3631 // skip private, static and <init> methods | |
| 3632 if ((!m->is_private()) && | |
| 3633 (!m->is_static()) && | |
| 3634 (m->name() != vmSymbols::object_initializer_name())) { | |
| 3635 | |
| 3636 symbolOop name = m->name(); | |
| 3637 symbolOop signature = m->signature(); | |
| 3638 klassOop k = this_klass->super(); | |
| 3639 methodOop super_m = NULL; | |
| 3640 while (k != NULL) { | |
| 3641 // skip supers that don't have final methods. | |
| 3642 if (k->klass_part()->has_final_method()) { | |
| 3643 // lookup a matching method in the super class hierarchy | |
| 3644 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
| 3645 if (super_m == NULL) { | |
| 3646 break; // didn't find any match; get out | |
| 3647 } | |
| 3648 | |
| 3649 if (super_m->is_final() && | |
| 3650 // matching method in super is final | |
| 3651 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
| 3652 super_m->method_holder(), | |
| 3653 super_m->method_holder(), | |
| 3654 super_m->access_flags(), false)) | |
| 3655 // this class can access super final method and therefore override | |
| 3656 ) { | |
| 3657 ResourceMark rm(THREAD); | |
| 3658 Exceptions::fthrow( | |
| 3659 THREAD_AND_LOCATION, | |
| 3660 vmSymbolHandles::java_lang_VerifyError(), | |
| 3661 "class %s overrides final method %s.%s", | |
| 3662 this_klass->external_name(), | |
| 3663 name->as_C_string(), | |
| 3664 signature->as_C_string() | |
| 3665 ); | |
| 3666 return; | |
| 3667 } | |
| 3668 | |
| 3669 // continue to look from super_m's holder's super. | |
| 3670 k = instanceKlass::cast(super_m->method_holder())->super(); | |
| 3671 continue; | |
| 3672 } | |
| 3673 | |
| 3674 k = k->klass_part()->super(); | |
| 3675 } | |
| 3676 } | |
| 3677 } | |
| 3678 } | |
| 3679 | |
| 3680 | |
| 3681 // assumes that this_klass is an interface | |
| 3682 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
| 3683 assert(this_klass->is_interface(), "not an interface"); | |
| 3684 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3685 int num_methods = methods->length(); | |
| 3686 | |
| 3687 for (int index = 0; index < num_methods; index++) { | |
| 3688 methodOop m = (methodOop)methods->obj_at(index); | |
| 3689 // if m is static and not the init method, throw a verify error | |
| 3690 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
| 3691 ResourceMark rm(THREAD); | |
| 3692 Exceptions::fthrow( | |
| 3693 THREAD_AND_LOCATION, | |
| 3694 vmSymbolHandles::java_lang_VerifyError(), | |
| 3695 "Illegal static method %s in interface %s", | |
| 3696 m->name()->as_C_string(), | |
| 3697 this_klass->external_name() | |
| 3698 ); | |
| 3699 return; | |
| 3700 } | |
| 3701 } | |
| 3702 } | |
| 3703 | |
| 3704 // utility methods for format checking | |
| 3705 | |
| 3706 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
| 3707 if (!_need_verify) { return; } | |
| 3708 | |
| 3709 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
| 3710 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 3711 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3712 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
| 3713 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 3714 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
| 3715 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3716 | |
| 3717 if ((is_abstract && is_final) || | |
| 3718 (is_interface && !is_abstract) || | |
| 3719 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
| 3720 (!is_interface && major_gte_15 && is_annotation)) { | |
| 3721 ResourceMark rm(THREAD); | |
| 3722 Exceptions::fthrow( | |
| 3723 THREAD_AND_LOCATION, | |
| 3724 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3725 "Illegal class modifiers in class %s: 0x%X", | |
| 3726 _class_name->as_C_string(), flags | |
| 3727 ); | |
| 3728 return; | |
| 3729 } | |
| 3730 } | |
| 3731 | |
| 3732 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
| 3733 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3734 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 3735 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3736 | |
| 3737 return ((is_public && is_protected) || | |
| 3738 (is_public && is_private) || | |
| 3739 (is_protected && is_private)); | |
| 3740 } | |
| 3741 | |
| 3742 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
|
176
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|
3743 u2 max_version = JDK_Version::is_gte_jdk17x_version() ? |
|
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parents:
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diff
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|
3744 JAVA_MAX_SUPPORTED_VERSION : JAVA_6_VERSION; |
| 0 | 3745 return (major >= JAVA_MIN_SUPPORTED_VERSION) && |
|
176
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136
diff
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|
3746 (major <= max_version) && |
|
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diff
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|
3747 ((major != max_version) || |
| 0 | 3748 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); |
| 3749 } | |
| 3750 | |
| 3751 void ClassFileParser::verify_legal_field_modifiers( | |
| 3752 jint flags, bool is_interface, TRAPS) { | |
| 3753 if (!_need_verify) { return; } | |
| 3754 | |
| 3755 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3756 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 3757 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3758 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 3759 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3760 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
| 3761 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
| 3762 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 3763 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3764 | |
| 3765 bool is_illegal = false; | |
| 3766 | |
| 3767 if (is_interface) { | |
| 3768 if (!is_public || !is_static || !is_final || is_private || | |
| 3769 is_protected || is_volatile || is_transient || | |
| 3770 (major_gte_15 && is_enum)) { | |
| 3771 is_illegal = true; | |
| 3772 } | |
| 3773 } else { // not interface | |
| 3774 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
| 3775 is_illegal = true; | |
| 3776 } | |
| 3777 } | |
| 3778 | |
| 3779 if (is_illegal) { | |
| 3780 ResourceMark rm(THREAD); | |
| 3781 Exceptions::fthrow( | |
| 3782 THREAD_AND_LOCATION, | |
| 3783 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3784 "Illegal field modifiers in class %s: 0x%X", | |
| 3785 _class_name->as_C_string(), flags); | |
| 3786 return; | |
| 3787 } | |
| 3788 } | |
| 3789 | |
| 3790 void ClassFileParser::verify_legal_method_modifiers( | |
| 3791 jint flags, bool is_interface, symbolHandle name, TRAPS) { | |
| 3792 if (!_need_verify) { return; } | |
| 3793 | |
| 3794 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3795 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3796 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 3797 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3798 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
| 3799 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 3800 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
| 3801 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
| 3802 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
| 3803 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3804 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
| 3805 | |
| 3806 bool is_illegal = false; | |
| 3807 | |
| 3808 if (is_interface) { | |
| 3809 if (!is_abstract || !is_public || is_static || is_final || | |
| 3810 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
| 3811 is_illegal = true; | |
| 3812 } | |
| 3813 } else { // not interface | |
| 3814 if (is_initializer) { | |
| 3815 if (is_static || is_final || is_synchronized || is_native || | |
| 3816 is_abstract || (major_gte_15 && is_bridge)) { | |
| 3817 is_illegal = true; | |
| 3818 } | |
| 3819 } else { // not initializer | |
| 3820 if (is_abstract) { | |
| 3821 if ((is_final || is_native || is_private || is_static || | |
| 3822 (major_gte_15 && (is_synchronized || is_strict)))) { | |
| 3823 is_illegal = true; | |
| 3824 } | |
| 3825 } | |
| 3826 if (has_illegal_visibility(flags)) { | |
| 3827 is_illegal = true; | |
| 3828 } | |
| 3829 } | |
| 3830 } | |
| 3831 | |
| 3832 if (is_illegal) { | |
| 3833 ResourceMark rm(THREAD); | |
| 3834 Exceptions::fthrow( | |
| 3835 THREAD_AND_LOCATION, | |
| 3836 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3837 "Method %s in class %s has illegal modifiers: 0x%X", | |
| 3838 name->as_C_string(), _class_name->as_C_string(), flags); | |
| 3839 return; | |
| 3840 } | |
| 3841 } | |
| 3842 | |
| 3843 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
| 3844 assert(_need_verify, "only called when _need_verify is true"); | |
| 3845 int i = 0; | |
| 3846 int count = length >> 2; | |
| 3847 for (int k=0; k<count; k++) { | |
| 3848 unsigned char b0 = buffer[i]; | |
| 3849 unsigned char b1 = buffer[i+1]; | |
| 3850 unsigned char b2 = buffer[i+2]; | |
| 3851 unsigned char b3 = buffer[i+3]; | |
| 3852 // For an unsigned char v, | |
| 3853 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
| 3854 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
| 3855 unsigned char res = b0 | b0 - 1 | | |
| 3856 b1 | b1 - 1 | | |
| 3857 b2 | b2 - 1 | | |
| 3858 b3 | b3 - 1; | |
| 3859 if (res >= 128) break; | |
| 3860 i += 4; | |
| 3861 } | |
| 3862 for(; i < length; i++) { | |
| 3863 unsigned short c; | |
| 3864 // no embedded zeros | |
| 3865 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3866 if(buffer[i] < 128) { | |
| 3867 continue; | |
| 3868 } | |
| 3869 if ((i + 5) < length) { // see if it's legal supplementary character | |
| 3870 if (UTF8::is_supplementary_character(&buffer[i])) { | |
| 3871 c = UTF8::get_supplementary_character(&buffer[i]); | |
| 3872 i += 5; | |
| 3873 continue; | |
| 3874 } | |
| 3875 } | |
| 3876 switch (buffer[i] >> 4) { | |
| 3877 default: break; | |
| 3878 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
| 3879 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3880 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
| 3881 c = (buffer[i] & 0x1F) << 6; | |
| 3882 i++; | |
| 3883 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 3884 c += buffer[i] & 0x3F; | |
| 3885 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
| 3886 // for classes with major > 47, c must a null or a character in its shortest form | |
| 3887 break; | |
| 3888 } | |
| 3889 } | |
| 3890 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3891 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
| 3892 c = (buffer[i] & 0xF) << 12; | |
| 3893 i += 2; | |
| 3894 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 3895 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
| 3896 if (_major_version <= 47 || c >= 0x800) { | |
| 3897 // for classes with major > 47, c must be in its shortest form | |
| 3898 break; | |
| 3899 } | |
| 3900 } | |
| 3901 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3902 } // end of switch | |
| 3903 } // end of for | |
| 3904 } | |
| 3905 | |
| 3906 // Checks if name is a legal class name. | |
| 3907 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) { | |
| 3908 if (!_need_verify || _relax_verify) { return; } | |
| 3909 | |
| 3910 char buf[fixed_buffer_size]; | |
| 3911 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3912 unsigned int length = name->utf8_length(); | |
| 3913 bool legal = false; | |
| 3914 | |
| 3915 if (length > 0) { | |
| 3916 char* p; | |
| 3917 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
| 3918 p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 3919 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3920 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 3921 if (bytes[0] != '<') { | |
| 3922 p = skip_over_field_name(bytes, true, length); | |
| 3923 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3924 } | |
| 3925 } else { | |
| 3926 // 4900761: relax the constraints based on JSR202 spec | |
| 3927 // Class names may be drawn from the entire Unicode character set. | |
| 3928 // Identifiers between '/' must be unqualified names. | |
| 3929 // The utf8 string has been verified when parsing cpool entries. | |
| 3930 legal = verify_unqualified_name(bytes, length, LegalClass); | |
| 3931 } | |
| 3932 } | |
| 3933 if (!legal) { | |
| 3934 ResourceMark rm(THREAD); | |
| 3935 Exceptions::fthrow( | |
| 3936 THREAD_AND_LOCATION, | |
| 3937 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3938 "Illegal class name \"%s\" in class file %s", bytes, | |
| 3939 _class_name->as_C_string() | |
| 3940 ); | |
| 3941 return; | |
| 3942 } | |
| 3943 } | |
| 3944 | |
| 3945 // Checks if name is a legal field name. | |
| 3946 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) { | |
| 3947 if (!_need_verify || _relax_verify) { return; } | |
| 3948 | |
| 3949 char buf[fixed_buffer_size]; | |
| 3950 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3951 unsigned int length = name->utf8_length(); | |
| 3952 bool legal = false; | |
| 3953 | |
| 3954 if (length > 0) { | |
| 3955 if (_major_version < JAVA_1_5_VERSION) { | |
| 3956 if (bytes[0] != '<') { | |
| 3957 char* p = skip_over_field_name(bytes, false, length); | |
| 3958 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3959 } | |
| 3960 } else { | |
| 3961 // 4881221: relax the constraints based on JSR202 spec | |
| 3962 legal = verify_unqualified_name(bytes, length, LegalField); | |
| 3963 } | |
| 3964 } | |
| 3965 | |
| 3966 if (!legal) { | |
| 3967 ResourceMark rm(THREAD); | |
| 3968 Exceptions::fthrow( | |
| 3969 THREAD_AND_LOCATION, | |
| 3970 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3971 "Illegal field name \"%s\" in class %s", bytes, | |
| 3972 _class_name->as_C_string() | |
| 3973 ); | |
| 3974 return; | |
| 3975 } | |
| 3976 } | |
| 3977 | |
| 3978 // Checks if name is a legal method name. | |
| 3979 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) { | |
| 3980 if (!_need_verify || _relax_verify) { return; } | |
| 3981 | |
| 3982 assert(!name.is_null(), "method name is null"); | |
| 3983 char buf[fixed_buffer_size]; | |
| 3984 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3985 unsigned int length = name->utf8_length(); | |
| 3986 bool legal = false; | |
| 3987 | |
| 3988 if (length > 0) { | |
| 3989 if (bytes[0] == '<') { | |
| 3990 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
| 3991 legal = true; | |
| 3992 } | |
| 3993 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 3994 char* p; | |
| 3995 p = skip_over_field_name(bytes, false, length); | |
| 3996 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3997 } else { | |
| 3998 // 4881221: relax the constraints based on JSR202 spec | |
| 3999 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
| 4000 } | |
| 4001 } | |
| 4002 | |
| 4003 if (!legal) { | |
| 4004 ResourceMark rm(THREAD); | |
| 4005 Exceptions::fthrow( | |
| 4006 THREAD_AND_LOCATION, | |
| 4007 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4008 "Illegal method name \"%s\" in class %s", bytes, | |
| 4009 _class_name->as_C_string() | |
| 4010 ); | |
| 4011 return; | |
| 4012 } | |
| 4013 } | |
| 4014 | |
| 4015 | |
| 4016 // Checks if signature is a legal field signature. | |
| 4017 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
| 4018 if (!_need_verify) { return; } | |
| 4019 | |
| 4020 char buf[fixed_buffer_size]; | |
| 4021 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4022 unsigned int length = signature->utf8_length(); | |
| 4023 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 4024 | |
| 4025 if (p == NULL || (p - bytes) != (int)length) { | |
| 4026 ResourceMark rm(THREAD); | |
| 4027 Exceptions::fthrow( | |
| 4028 THREAD_AND_LOCATION, | |
| 4029 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4030 "Field \"%s\" in class %s has illegal signature \"%s\"", | |
| 4031 name->as_C_string(), _class_name->as_C_string(), bytes | |
| 4032 ); | |
| 4033 return; | |
| 4034 } | |
| 4035 } | |
| 4036 | |
| 4037 // Checks if signature is a legal method signature. | |
| 4038 // Returns number of parameters | |
| 4039 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
| 4040 if (!_need_verify) { | |
| 4041 // make sure caller's args_size will be less than 0 even for non-static | |
| 4042 // method so it will be recomputed in compute_size_of_parameters(). | |
| 4043 return -2; | |
| 4044 } | |
| 4045 | |
| 4046 unsigned int args_size = 0; | |
| 4047 char buf[fixed_buffer_size]; | |
| 4048 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4049 unsigned int length = signature->utf8_length(); | |
| 4050 char* nextp; | |
| 4051 | |
| 4052 // The first character must be a '(' | |
| 4053 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
| 4054 length--; | |
| 4055 // Skip over legal field signatures | |
| 4056 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 4057 while ((length > 0) && (nextp != NULL)) { | |
| 4058 args_size++; | |
| 4059 if (p[0] == 'J' || p[0] == 'D') { | |
| 4060 args_size++; | |
| 4061 } | |
| 4062 length -= nextp - p; | |
| 4063 p = nextp; | |
| 4064 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 4065 } | |
| 4066 // The first non-signature thing better be a ')' | |
| 4067 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
| 4068 length--; | |
| 4069 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
| 4070 // All internal methods must return void | |
| 4071 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
| 4072 return args_size; | |
| 4073 } | |
| 4074 } else { | |
| 4075 // Now we better just have a return value | |
| 4076 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
| 4077 if (nextp && ((int)length == (nextp - p))) { | |
| 4078 return args_size; | |
| 4079 } | |
| 4080 } | |
| 4081 } | |
| 4082 } | |
| 4083 // Report error | |
| 4084 ResourceMark rm(THREAD); | |
| 4085 Exceptions::fthrow( | |
| 4086 THREAD_AND_LOCATION, | |
| 4087 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4088 "Method \"%s\" in class %s has illegal signature \"%s\"", | |
| 4089 name->as_C_string(), _class_name->as_C_string(), p | |
| 4090 ); | |
| 4091 return 0; | |
| 4092 } | |
| 4093 | |
| 4094 | |
| 4095 // Unqualified names may not contain the characters '.', ';', or '/'. | |
| 4096 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>. | |
| 4097 // Note that method names may not be <init> or <clinit> in this method. | |
| 4098 // Because these names have been checked as special cases before calling this method | |
| 4099 // in verify_legal_method_name. | |
| 4100 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) { | |
| 4101 jchar ch; | |
| 4102 | |
| 4103 for (char* p = name; p != name + length; ) { | |
| 4104 ch = *p; | |
| 4105 if (ch < 128) { | |
| 4106 p++; | |
| 4107 if (ch == '.' || ch == ';') { | |
| 4108 return false; // do not permit '.' or ';' | |
| 4109 } | |
| 4110 if (type != LegalClass && ch == '/') { | |
| 4111 return false; // do not permit '/' unless it's class name | |
| 4112 } | |
| 4113 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
| 4114 return false; // do not permit '<' or '>' in method names | |
| 4115 } | |
| 4116 } else { | |
| 4117 char* tmp_p = UTF8::next(p, &ch); | |
| 4118 p = tmp_p; | |
| 4119 } | |
| 4120 } | |
| 4121 return true; | |
| 4122 } | |
| 4123 | |
| 4124 | |
| 4125 // Take pointer to a string. Skip over the longest part of the string that could | |
| 4126 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
| 4127 // Return a pointer to just past the fieldname. | |
| 4128 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
| 4129 // being true, we saw consecutive slashes (meaning we were looking for a | |
| 4130 // qualified path but found something that was badly-formed). | |
| 4131 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
| 4132 char* p; | |
| 4133 jchar ch; | |
| 4134 jboolean last_is_slash = false; | |
| 4135 jboolean not_first_ch = false; | |
| 4136 | |
| 4137 for (p = name; p != name + length; not_first_ch = true) { | |
| 4138 char* old_p = p; | |
| 4139 ch = *p; | |
| 4140 if (ch < 128) { | |
| 4141 p++; | |
| 4142 // quick check for ascii | |
| 4143 if ((ch >= 'a' && ch <= 'z') || | |
| 4144 (ch >= 'A' && ch <= 'Z') || | |
| 4145 (ch == '_' || ch == '$') || | |
| 4146 (not_first_ch && ch >= '0' && ch <= '9')) { | |
| 4147 last_is_slash = false; | |
| 4148 continue; | |
| 4149 } | |
| 4150 if (slash_ok && ch == '/') { | |
| 4151 if (last_is_slash) { | |
| 4152 return NULL; // Don't permit consecutive slashes | |
| 4153 } | |
| 4154 last_is_slash = true; | |
| 4155 continue; | |
| 4156 } | |
| 4157 } else { | |
| 4158 jint unicode_ch; | |
| 4159 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
| 4160 p = tmp_p; | |
| 4161 last_is_slash = false; | |
| 4162 // Check if ch is Java identifier start or is Java identifier part | |
| 4163 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
| 4164 EXCEPTION_MARK; | |
| 4165 instanceKlassHandle klass (THREAD, SystemDictionary::char_klass()); | |
| 4166 | |
| 4167 // return value | |
| 4168 JavaValue result(T_BOOLEAN); | |
| 4169 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
| 4170 JavaCallArguments args; | |
| 4171 args.push_int(unicode_ch); | |
| 4172 | |
| 4173 // public static boolean isJavaIdentifierStart(char ch); | |
| 4174 JavaCalls::call_static(&result, | |
| 4175 klass, | |
| 4176 vmSymbolHandles::isJavaIdentifierStart_name(), | |
| 4177 vmSymbolHandles::int_bool_signature(), | |
| 4178 &args, | |
| 4179 THREAD); | |
| 4180 | |
| 4181 if (HAS_PENDING_EXCEPTION) { | |
| 4182 CLEAR_PENDING_EXCEPTION; | |
| 4183 return 0; | |
| 4184 } | |
| 4185 if (result.get_jboolean()) { | |
| 4186 continue; | |
| 4187 } | |
| 4188 | |
| 4189 if (not_first_ch) { | |
| 4190 // public static boolean isJavaIdentifierPart(char ch); | |
| 4191 JavaCalls::call_static(&result, | |
| 4192 klass, | |
| 4193 vmSymbolHandles::isJavaIdentifierPart_name(), | |
| 4194 vmSymbolHandles::int_bool_signature(), | |
| 4195 &args, | |
| 4196 THREAD); | |
| 4197 | |
| 4198 if (HAS_PENDING_EXCEPTION) { | |
| 4199 CLEAR_PENDING_EXCEPTION; | |
| 4200 return 0; | |
| 4201 } | |
| 4202 | |
| 4203 if (result.get_jboolean()) { | |
| 4204 continue; | |
| 4205 } | |
| 4206 } | |
| 4207 } | |
| 4208 return (not_first_ch) ? old_p : NULL; | |
| 4209 } | |
| 4210 return (not_first_ch) ? p : NULL; | |
| 4211 } | |
| 4212 | |
| 4213 | |
| 4214 // Take pointer to a string. Skip over the longest part of the string that could | |
| 4215 // be taken as a field signature. Allow "void" if void_ok. | |
| 4216 // Return a pointer to just past the signature. | |
| 4217 // Return NULL if no legal signature is found. | |
| 4218 char* ClassFileParser::skip_over_field_signature(char* signature, | |
| 4219 bool void_ok, | |
| 4220 unsigned int length, | |
| 4221 TRAPS) { | |
| 4222 unsigned int array_dim = 0; | |
| 4223 while (length > 0) { | |
| 4224 switch (signature[0]) { | |
| 4225 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
| 4226 case JVM_SIGNATURE_BOOLEAN: | |
| 4227 case JVM_SIGNATURE_BYTE: | |
| 4228 case JVM_SIGNATURE_CHAR: | |
| 4229 case JVM_SIGNATURE_SHORT: | |
| 4230 case JVM_SIGNATURE_INT: | |
| 4231 case JVM_SIGNATURE_FLOAT: | |
| 4232 case JVM_SIGNATURE_LONG: | |
| 4233 case JVM_SIGNATURE_DOUBLE: | |
| 4234 return signature + 1; | |
| 4235 case JVM_SIGNATURE_CLASS: { | |
| 4236 if (_major_version < JAVA_1_5_VERSION) { | |
| 4237 // Skip over the class name if one is there | |
| 4238 char* p = skip_over_field_name(signature + 1, true, --length); | |
| 4239 | |
| 4240 // The next character better be a semicolon | |
| 4241 if (p && (p - signature) > 1 && p[0] == ';') { | |
| 4242 return p + 1; | |
| 4243 } | |
| 4244 } else { | |
| 4245 // 4900761: For class version > 48, any unicode is allowed in class name. | |
| 4246 length--; | |
| 4247 signature++; | |
| 4248 while (length > 0 && signature[0] != ';') { | |
| 4249 if (signature[0] == '.') { | |
| 4250 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
| 4251 } | |
| 4252 length--; | |
| 4253 signature++; | |
| 4254 } | |
| 4255 if (signature[0] == ';') { return signature + 1; } | |
| 4256 } | |
| 4257 | |
| 4258 return NULL; | |
| 4259 } | |
| 4260 case JVM_SIGNATURE_ARRAY: | |
| 4261 array_dim++; | |
| 4262 if (array_dim > 255) { | |
| 4263 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
| 4264 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
| 4265 } | |
| 4266 // The rest of what's there better be a legal signature | |
| 4267 signature++; | |
| 4268 length--; | |
| 4269 void_ok = false; | |
| 4270 break; | |
| 4271 | |
| 4272 default: | |
| 4273 return NULL; | |
| 4274 } | |
| 4275 } | |
| 4276 return NULL; | |
| 4277 } |