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rev 1079 : 6829192: JSR 292 needs to support 64-bit x86
Summary: changes for method handles and invokedynamic
Reviewed-by: ?, ?
rev 1083 : [mq]: indy.compiler.inline.patch
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--- old/src/share/vm/classfile/classFileParser.cpp
+++ new/src/share/vm/classfile/classFileParser.cpp
1 1 /*
2 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 21 * have any questions.
22 22 *
23 23 */
24 24
25 25 #include "incls/_precompiled.incl"
26 26 #include "incls/_classFileParser.cpp.incl"
27 27
28 28 // We generally try to create the oops directly when parsing, rather than allocating
29 29 // temporary data structures and copying the bytes twice. A temporary area is only
30 30 // needed when parsing utf8 entries in the constant pool and when parsing line number
31 31 // tables.
32 32
33 33 // We add assert in debug mode when class format is not checked.
34 34
35 35 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
36 36 #define JAVA_MIN_SUPPORTED_VERSION 45
37 37 #define JAVA_MAX_SUPPORTED_VERSION 51
38 38 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
39 39
40 40 // Used for two backward compatibility reasons:
41 41 // - to check for new additions to the class file format in JDK1.5
42 42 // - to check for bug fixes in the format checker in JDK1.5
43 43 #define JAVA_1_5_VERSION 49
44 44
45 45 // Used for backward compatibility reasons:
46 46 // - to check for javac bug fixes that happened after 1.5
47 47 // - also used as the max version when running in jdk6
48 48 #define JAVA_6_VERSION 50
49 49
50 50
51 51 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) {
52 52 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
53 53 // this function (_current can be allocated in a register, with scalar
54 54 // replacement of aggregates). The _current pointer is copied back to
55 55 // stream() when this function returns. DON'T call another method within
56 56 // this method that uses stream().
57 57 ClassFileStream* cfs0 = stream();
58 58 ClassFileStream cfs1 = *cfs0;
59 59 ClassFileStream* cfs = &cfs1;
60 60 #ifdef ASSERT
61 61 u1* old_current = cfs0->current();
62 62 #endif
63 63
64 64 // Used for batching symbol allocations.
65 65 const char* names[SymbolTable::symbol_alloc_batch_size];
66 66 int lengths[SymbolTable::symbol_alloc_batch_size];
67 67 int indices[SymbolTable::symbol_alloc_batch_size];
68 68 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
69 69 int names_count = 0;
70 70
71 71 // parsing Index 0 is unused
72 72 for (int index = 1; index < length; index++) {
73 73 // Each of the following case guarantees one more byte in the stream
74 74 // for the following tag or the access_flags following constant pool,
75 75 // so we don't need bounds-check for reading tag.
76 76 u1 tag = cfs->get_u1_fast();
77 77 switch (tag) {
78 78 case JVM_CONSTANT_Class :
79 79 {
80 80 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
81 81 u2 name_index = cfs->get_u2_fast();
82 82 cp->klass_index_at_put(index, name_index);
83 83 }
84 84 break;
85 85 case JVM_CONSTANT_Fieldref :
86 86 {
87 87 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
88 88 u2 class_index = cfs->get_u2_fast();
89 89 u2 name_and_type_index = cfs->get_u2_fast();
90 90 cp->field_at_put(index, class_index, name_and_type_index);
91 91 }
92 92 break;
93 93 case JVM_CONSTANT_Methodref :
94 94 {
95 95 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
96 96 u2 class_index = cfs->get_u2_fast();
97 97 u2 name_and_type_index = cfs->get_u2_fast();
98 98 cp->method_at_put(index, class_index, name_and_type_index);
99 99 }
100 100 break;
101 101 case JVM_CONSTANT_InterfaceMethodref :
102 102 {
103 103 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
104 104 u2 class_index = cfs->get_u2_fast();
105 105 u2 name_and_type_index = cfs->get_u2_fast();
106 106 cp->interface_method_at_put(index, class_index, name_and_type_index);
107 107 }
108 108 break;
109 109 case JVM_CONSTANT_String :
110 110 {
111 111 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
112 112 u2 string_index = cfs->get_u2_fast();
113 113 cp->string_index_at_put(index, string_index);
114 114 }
115 115 break;
116 116 case JVM_CONSTANT_Integer :
117 117 {
118 118 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
119 119 u4 bytes = cfs->get_u4_fast();
120 120 cp->int_at_put(index, (jint) bytes);
121 121 }
122 122 break;
123 123 case JVM_CONSTANT_Float :
124 124 {
125 125 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
126 126 u4 bytes = cfs->get_u4_fast();
127 127 cp->float_at_put(index, *(jfloat*)&bytes);
128 128 }
129 129 break;
130 130 case JVM_CONSTANT_Long :
131 131 // A mangled type might cause you to overrun allocated memory
132 132 guarantee_property(index+1 < length,
133 133 "Invalid constant pool entry %u in class file %s",
134 134 index, CHECK);
135 135 {
136 136 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
137 137 u8 bytes = cfs->get_u8_fast();
138 138 cp->long_at_put(index, bytes);
139 139 }
140 140 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
141 141 break;
142 142 case JVM_CONSTANT_Double :
143 143 // A mangled type might cause you to overrun allocated memory
144 144 guarantee_property(index+1 < length,
145 145 "Invalid constant pool entry %u in class file %s",
146 146 index, CHECK);
147 147 {
148 148 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
149 149 u8 bytes = cfs->get_u8_fast();
150 150 cp->double_at_put(index, *(jdouble*)&bytes);
151 151 }
152 152 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
153 153 break;
154 154 case JVM_CONSTANT_NameAndType :
155 155 {
156 156 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
157 157 u2 name_index = cfs->get_u2_fast();
158 158 u2 signature_index = cfs->get_u2_fast();
159 159 cp->name_and_type_at_put(index, name_index, signature_index);
160 160 }
161 161 break;
162 162 case JVM_CONSTANT_Utf8 :
163 163 {
164 164 cfs->guarantee_more(2, CHECK); // utf8_length
165 165 u2 utf8_length = cfs->get_u2_fast();
166 166 u1* utf8_buffer = cfs->get_u1_buffer();
167 167 assert(utf8_buffer != NULL, "null utf8 buffer");
168 168 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
169 169 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
170 170 cfs->skip_u1_fast(utf8_length);
171 171
172 172 // Before storing the symbol, make sure it's legal
173 173 if (_need_verify) {
174 174 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
175 175 }
176 176
177 177 if (AnonymousClasses && has_cp_patch_at(index)) {
178 178 Handle patch = clear_cp_patch_at(index);
179 179 guarantee_property(java_lang_String::is_instance(patch()),
180 180 "Illegal utf8 patch at %d in class file %s",
181 181 index, CHECK);
182 182 char* str = java_lang_String::as_utf8_string(patch());
183 183 // (could use java_lang_String::as_symbol instead, but might as well batch them)
184 184 utf8_buffer = (u1*) str;
185 185 utf8_length = (int) strlen(str);
186 186 }
187 187
188 188 unsigned int hash;
189 189 symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
190 190 if (result == NULL) {
191 191 names[names_count] = (char*)utf8_buffer;
192 192 lengths[names_count] = utf8_length;
193 193 indices[names_count] = index;
194 194 hashValues[names_count++] = hash;
195 195 if (names_count == SymbolTable::symbol_alloc_batch_size) {
196 196 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
197 197 names_count = 0;
198 198 }
199 199 } else {
200 200 cp->symbol_at_put(index, result);
201 201 }
202 202 }
203 203 break;
204 204 default:
205 205 classfile_parse_error(
206 206 "Unknown constant tag %u in class file %s", tag, CHECK);
207 207 break;
208 208 }
209 209 }
210 210
211 211 // Allocate the remaining symbols
212 212 if (names_count > 0) {
213 213 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
214 214 }
215 215
216 216 // Copy _current pointer of local copy back to stream().
217 217 #ifdef ASSERT
218 218 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
219 219 #endif
220 220 cfs0->set_current(cfs1.current());
221 221 }
222 222
223 223 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
224 224
225 225 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
226 226 ClassFileStream* cfs = stream();
227 227 constantPoolHandle nullHandle;
228 228
229 229 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
230 230 u2 length = cfs->get_u2_fast();
231 231 guarantee_property(
232 232 length >= 1, "Illegal constant pool size %u in class file %s",
233 233 length, CHECK_(nullHandle));
234 234 constantPoolOop constant_pool =
235 235 oopFactory::new_constantPool(length,
236 236 methodOopDesc::IsSafeConc,
237 237 CHECK_(nullHandle));
238 238 constantPoolHandle cp (THREAD, constant_pool);
239 239
240 240 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops
241 241
242 242 // parsing constant pool entries
243 243 parse_constant_pool_entries(cp, length, CHECK_(nullHandle));
244 244
245 245 int index = 1; // declared outside of loops for portability
246 246
247 247 // first verification pass - validate cross references and fixup class and string constants
248 248 for (index = 1; index < length; index++) { // Index 0 is unused
249 249 switch (cp->tag_at(index).value()) {
250 250 case JVM_CONSTANT_Class :
251 251 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
252 252 break;
253 253 case JVM_CONSTANT_Fieldref :
254 254 // fall through
255 255 case JVM_CONSTANT_Methodref :
256 256 // fall through
257 257 case JVM_CONSTANT_InterfaceMethodref : {
258 258 if (!_need_verify) break;
259 259 int klass_ref_index = cp->klass_ref_index_at(index);
260 260 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
261 261 check_property(valid_cp_range(klass_ref_index, length) &&
262 262 is_klass_reference(cp, klass_ref_index),
263 263 "Invalid constant pool index %u in class file %s",
264 264 klass_ref_index,
265 265 CHECK_(nullHandle));
266 266 check_property(valid_cp_range(name_and_type_ref_index, length) &&
267 267 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
268 268 "Invalid constant pool index %u in class file %s",
269 269 name_and_type_ref_index,
270 270 CHECK_(nullHandle));
271 271 break;
272 272 }
273 273 case JVM_CONSTANT_String :
274 274 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
275 275 break;
276 276 case JVM_CONSTANT_Integer :
277 277 break;
278 278 case JVM_CONSTANT_Float :
279 279 break;
280 280 case JVM_CONSTANT_Long :
281 281 case JVM_CONSTANT_Double :
282 282 index++;
283 283 check_property(
284 284 (index < length && cp->tag_at(index).is_invalid()),
285 285 "Improper constant pool long/double index %u in class file %s",
286 286 index, CHECK_(nullHandle));
287 287 break;
288 288 case JVM_CONSTANT_NameAndType : {
289 289 if (!_need_verify) break;
290 290 int name_ref_index = cp->name_ref_index_at(index);
291 291 int signature_ref_index = cp->signature_ref_index_at(index);
292 292 check_property(
293 293 valid_cp_range(name_ref_index, length) &&
294 294 cp->tag_at(name_ref_index).is_utf8(),
295 295 "Invalid constant pool index %u in class file %s",
296 296 name_ref_index, CHECK_(nullHandle));
297 297 check_property(
298 298 valid_cp_range(signature_ref_index, length) &&
299 299 cp->tag_at(signature_ref_index).is_utf8(),
300 300 "Invalid constant pool index %u in class file %s",
301 301 signature_ref_index, CHECK_(nullHandle));
302 302 break;
303 303 }
304 304 case JVM_CONSTANT_Utf8 :
305 305 break;
306 306 case JVM_CONSTANT_UnresolvedClass : // fall-through
307 307 case JVM_CONSTANT_UnresolvedClassInError:
308 308 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
309 309 break;
310 310 case JVM_CONSTANT_ClassIndex :
311 311 {
312 312 int class_index = cp->klass_index_at(index);
313 313 check_property(
314 314 valid_cp_range(class_index, length) &&
315 315 cp->tag_at(class_index).is_utf8(),
316 316 "Invalid constant pool index %u in class file %s",
317 317 class_index, CHECK_(nullHandle));
318 318 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
319 319 }
320 320 break;
321 321 case JVM_CONSTANT_UnresolvedString :
322 322 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
323 323 break;
324 324 case JVM_CONSTANT_StringIndex :
325 325 {
326 326 int string_index = cp->string_index_at(index);
327 327 check_property(
328 328 valid_cp_range(string_index, length) &&
329 329 cp->tag_at(string_index).is_utf8(),
330 330 "Invalid constant pool index %u in class file %s",
331 331 string_index, CHECK_(nullHandle));
332 332 symbolOop sym = cp->symbol_at(string_index);
333 333 cp->unresolved_string_at_put(index, sym);
334 334 }
335 335 break;
336 336 default:
337 337 fatal1("bad constant pool tag value %u", cp->tag_at(index).value());
338 338 ShouldNotReachHere();
339 339 break;
340 340 } // end of switch
341 341 } // end of for
342 342
343 343 if (_cp_patches != NULL) {
344 344 // need to treat this_class specially...
345 345 assert(AnonymousClasses, "");
346 346 int this_class_index;
347 347 {
348 348 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
349 349 u1* mark = cfs->current();
350 350 u2 flags = cfs->get_u2_fast();
351 351 this_class_index = cfs->get_u2_fast();
352 352 cfs->set_current(mark); // revert to mark
353 353 }
354 354
355 355 for (index = 1; index < length; index++) { // Index 0 is unused
356 356 if (has_cp_patch_at(index)) {
357 357 guarantee_property(index != this_class_index,
358 358 "Illegal constant pool patch to self at %d in class file %s",
359 359 index, CHECK_(nullHandle));
360 360 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
361 361 }
362 362 }
363 363 // Ensure that all the patches have been used.
364 364 for (index = 0; index < _cp_patches->length(); index++) {
365 365 guarantee_property(!has_cp_patch_at(index),
366 366 "Unused constant pool patch at %d in class file %s",
367 367 index, CHECK_(nullHandle));
368 368 }
369 369 }
370 370
371 371 if (!_need_verify) {
372 372 return cp;
373 373 }
374 374
375 375 // second verification pass - checks the strings are of the right format.
376 376 // but not yet to the other entries
377 377 for (index = 1; index < length; index++) {
378 378 jbyte tag = cp->tag_at(index).value();
379 379 switch (tag) {
380 380 case JVM_CONSTANT_UnresolvedClass: {
381 381 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index));
382 382 // check the name, even if _cp_patches will overwrite it
383 383 verify_legal_class_name(class_name, CHECK_(nullHandle));
384 384 break;
385 385 }
386 386 case JVM_CONSTANT_Fieldref:
387 387 case JVM_CONSTANT_Methodref:
388 388 case JVM_CONSTANT_InterfaceMethodref: {
389 389 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
390 390 // already verified to be utf8
391 391 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
392 392 // already verified to be utf8
393 393 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
394 394 symbolHandle name(THREAD, cp->symbol_at(name_ref_index));
395 395 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index));
396 396 if (tag == JVM_CONSTANT_Fieldref) {
397 397 verify_legal_field_name(name, CHECK_(nullHandle));
398 398 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
399 399 } else {
400 400 verify_legal_method_name(name, CHECK_(nullHandle));
401 401 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
402 402 if (tag == JVM_CONSTANT_Methodref) {
403 403 // 4509014: If a class method name begins with '<', it must be "<init>".
404 404 assert(!name.is_null(), "method name in constant pool is null");
405 405 unsigned int name_len = name->utf8_length();
406 406 assert(name_len > 0, "bad method name"); // already verified as legal name
407 407 if (name->byte_at(0) == '<') {
408 408 if (name() != vmSymbols::object_initializer_name()) {
409 409 classfile_parse_error(
410 410 "Bad method name at constant pool index %u in class file %s",
411 411 name_ref_index, CHECK_(nullHandle));
412 412 }
413 413 }
414 414 }
415 415 }
416 416 break;
417 417 }
418 418 } // end of switch
419 419 } // end of for
420 420
421 421 return cp;
422 422 }
423 423
424 424
425 425 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
426 426 assert(AnonymousClasses, "");
427 427 BasicType patch_type = T_VOID;
428 428 switch (cp->tag_at(index).value()) {
429 429
430 430 case JVM_CONSTANT_UnresolvedClass :
431 431 // Patching a class means pre-resolving it.
432 432 // The name in the constant pool is ignored.
433 433 if (patch->klass() == SystemDictionary::class_klass()) { // %%% java_lang_Class::is_instance
434 434 guarantee_property(!java_lang_Class::is_primitive(patch()),
435 435 "Illegal class patch at %d in class file %s",
436 436 index, CHECK);
437 437 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch()));
438 438 } else {
439 439 guarantee_property(java_lang_String::is_instance(patch()),
440 440 "Illegal class patch at %d in class file %s",
441 441 index, CHECK);
442 442 symbolHandle name = java_lang_String::as_symbol(patch(), CHECK);
443 443 cp->unresolved_klass_at_put(index, name());
444 444 }
445 445 break;
446 446
447 447 case JVM_CONSTANT_UnresolvedString :
448 448 // Patching a string means pre-resolving it.
449 449 // The spelling in the constant pool is ignored.
450 450 // The constant reference may be any object whatever.
451 451 // If it is not a real interned string, the constant is referred
452 452 // to as a "pseudo-string", and must be presented to the CP
453 453 // explicitly, because it may require scavenging.
454 454 cp->pseudo_string_at_put(index, patch());
455 455 break;
456 456
457 457 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
458 458 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
459 459 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
460 460 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
461 461 patch_prim:
462 462 {
463 463 jvalue value;
464 464 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
465 465 guarantee_property(value_type == patch_type,
466 466 "Illegal primitive patch at %d in class file %s",
467 467 index, CHECK);
468 468 switch (value_type) {
469 469 case T_INT: cp->int_at_put(index, value.i); break;
470 470 case T_FLOAT: cp->float_at_put(index, value.f); break;
471 471 case T_LONG: cp->long_at_put(index, value.j); break;
472 472 case T_DOUBLE: cp->double_at_put(index, value.d); break;
473 473 default: assert(false, "");
474 474 }
475 475 }
476 476 break;
477 477
478 478 default:
479 479 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
480 480 guarantee_property(!has_cp_patch_at(index),
481 481 "Illegal unexpected patch at %d in class file %s",
482 482 index, CHECK);
483 483 return;
484 484 }
485 485
486 486 // On fall-through, mark the patch as used.
487 487 clear_cp_patch_at(index);
488 488 }
489 489
490 490
491 491
492 492 class NameSigHash: public ResourceObj {
493 493 public:
494 494 symbolOop _name; // name
495 495 symbolOop _sig; // signature
496 496 NameSigHash* _next; // Next entry in hash table
497 497 };
498 498
499 499
500 500 #define HASH_ROW_SIZE 256
501 501
502 502 unsigned int hash(symbolOop name, symbolOop sig) {
503 503 unsigned int raw_hash = 0;
504 504 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
505 505 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
506 506
507 507 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
508 508 }
509 509
510 510
511 511 void initialize_hashtable(NameSigHash** table) {
512 512 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
513 513 }
514 514
515 515 // Return false if the name/sig combination is found in table.
516 516 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
517 517 // The old format checker uses heap sort to find duplicates.
518 518 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
519 519 // of table since we don't expect symbolOop's to move.
520 520 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) {
521 521 assert(name != NULL, "name in constant pool is NULL");
522 522
523 523 // First lookup for duplicates
524 524 int index = hash(name, sig);
525 525 NameSigHash* entry = table[index];
526 526 while (entry != NULL) {
527 527 if (entry->_name == name && entry->_sig == sig) {
528 528 return false;
529 529 }
530 530 entry = entry->_next;
531 531 }
532 532
533 533 // No duplicate is found, allocate a new entry and fill it.
534 534 entry = new NameSigHash();
535 535 entry->_name = name;
536 536 entry->_sig = sig;
537 537
538 538 // Insert into hash table
539 539 entry->_next = table[index];
540 540 table[index] = entry;
541 541
542 542 return true;
543 543 }
544 544
545 545
546 546 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
547 547 int length,
548 548 Handle class_loader,
549 549 Handle protection_domain,
550 550 symbolHandle class_name,
551 551 TRAPS) {
552 552 ClassFileStream* cfs = stream();
553 553 assert(length > 0, "only called for length>0");
554 554 objArrayHandle nullHandle;
555 555 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
556 556 objArrayHandle interfaces (THREAD, interface_oop);
557 557
558 558 int index;
559 559 for (index = 0; index < length; index++) {
560 560 u2 interface_index = cfs->get_u2(CHECK_(nullHandle));
561 561 KlassHandle interf;
562 562 check_property(
563 563 valid_cp_range(interface_index, cp->length()) &&
564 564 is_klass_reference(cp, interface_index),
565 565 "Interface name has bad constant pool index %u in class file %s",
566 566 interface_index, CHECK_(nullHandle));
567 567 if (cp->tag_at(interface_index).is_klass()) {
568 568 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
569 569 } else {
570 570 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index));
571 571
572 572 // Don't need to check legal name because it's checked when parsing constant pool.
573 573 // But need to make sure it's not an array type.
574 574 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
575 575 "Bad interface name in class file %s", CHECK_(nullHandle));
576 576
577 577 // Call resolve_super so classcircularity is checked
578 578 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
579 579 unresolved_klass, class_loader, protection_domain,
580 580 false, CHECK_(nullHandle));
581 581 interf = KlassHandle(THREAD, k);
582 582
583 583 if (LinkWellKnownClasses) // my super type is well known to me
584 584 cp->klass_at_put(interface_index, interf()); // eagerly resolve
585 585 }
586 586
587 587 if (!Klass::cast(interf())->is_interface()) {
588 588 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle);
589 589 }
590 590 interfaces->obj_at_put(index, interf());
591 591 }
592 592
593 593 if (!_need_verify || length <= 1) {
594 594 return interfaces;
595 595 }
596 596
597 597 // Check if there's any duplicates in interfaces
598 598 ResourceMark rm(THREAD);
599 599 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
600 600 THREAD, NameSigHash*, HASH_ROW_SIZE);
601 601 initialize_hashtable(interface_names);
602 602 bool dup = false;
603 603 {
604 604 debug_only(No_Safepoint_Verifier nsv;)
605 605 for (index = 0; index < length; index++) {
606 606 klassOop k = (klassOop)interfaces->obj_at(index);
607 607 symbolOop name = instanceKlass::cast(k)->name();
608 608 // If no duplicates, add (name, NULL) in hashtable interface_names.
609 609 if (!put_after_lookup(name, NULL, interface_names)) {
610 610 dup = true;
611 611 break;
612 612 }
613 613 }
614 614 }
615 615 if (dup) {
616 616 classfile_parse_error("Duplicate interface name in class file %s",
617 617 CHECK_(nullHandle));
618 618 }
619 619
620 620 return interfaces;
621 621 }
622 622
623 623
624 624 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
625 625 // Make sure the constant pool entry is of a type appropriate to this field
626 626 guarantee_property(
627 627 (constantvalue_index > 0 &&
628 628 constantvalue_index < cp->length()),
629 629 "Bad initial value index %u in ConstantValue attribute in class file %s",
630 630 constantvalue_index, CHECK);
631 631 constantTag value_type = cp->tag_at(constantvalue_index);
632 632 switch ( cp->basic_type_for_signature_at(signature_index) ) {
633 633 case T_LONG:
634 634 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
635 635 break;
636 636 case T_FLOAT:
637 637 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
638 638 break;
639 639 case T_DOUBLE:
640 640 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
641 641 break;
642 642 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
643 643 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
644 644 break;
645 645 case T_OBJECT:
646 646 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;", 18)
647 647 && (value_type.is_string() || value_type.is_unresolved_string())),
648 648 "Bad string initial value in class file %s", CHECK);
649 649 break;
650 650 default:
651 651 classfile_parse_error(
652 652 "Unable to set initial value %u in class file %s",
653 653 constantvalue_index, CHECK);
654 654 }
655 655 }
656 656
657 657
658 658 // Parse attributes for a field.
659 659 void ClassFileParser::parse_field_attributes(constantPoolHandle cp,
660 660 u2 attributes_count,
661 661 bool is_static, u2 signature_index,
662 662 u2* constantvalue_index_addr,
663 663 bool* is_synthetic_addr,
664 664 u2* generic_signature_index_addr,
665 665 typeArrayHandle* field_annotations,
666 666 TRAPS) {
667 667 ClassFileStream* cfs = stream();
668 668 assert(attributes_count > 0, "length should be greater than 0");
669 669 u2 constantvalue_index = 0;
670 670 u2 generic_signature_index = 0;
671 671 bool is_synthetic = false;
672 672 u1* runtime_visible_annotations = NULL;
673 673 int runtime_visible_annotations_length = 0;
674 674 u1* runtime_invisible_annotations = NULL;
675 675 int runtime_invisible_annotations_length = 0;
676 676 while (attributes_count--) {
677 677 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
678 678 u2 attribute_name_index = cfs->get_u2_fast();
679 679 u4 attribute_length = cfs->get_u4_fast();
680 680 check_property(valid_cp_range(attribute_name_index, cp->length()) &&
681 681 cp->tag_at(attribute_name_index).is_utf8(),
682 682 "Invalid field attribute index %u in class file %s",
683 683 attribute_name_index,
684 684 CHECK);
685 685 symbolOop attribute_name = cp->symbol_at(attribute_name_index);
686 686 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
687 687 // ignore if non-static
688 688 if (constantvalue_index != 0) {
689 689 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
690 690 }
691 691 check_property(
692 692 attribute_length == 2,
693 693 "Invalid ConstantValue field attribute length %u in class file %s",
694 694 attribute_length, CHECK);
695 695 constantvalue_index = cfs->get_u2(CHECK);
696 696 if (_need_verify) {
697 697 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
698 698 }
699 699 } else if (attribute_name == vmSymbols::tag_synthetic()) {
700 700 if (attribute_length != 0) {
701 701 classfile_parse_error(
702 702 "Invalid Synthetic field attribute length %u in class file %s",
703 703 attribute_length, CHECK);
704 704 }
705 705 is_synthetic = true;
706 706 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
707 707 if (attribute_length != 0) {
708 708 classfile_parse_error(
709 709 "Invalid Deprecated field attribute length %u in class file %s",
710 710 attribute_length, CHECK);
711 711 }
712 712 } else if (_major_version >= JAVA_1_5_VERSION) {
713 713 if (attribute_name == vmSymbols::tag_signature()) {
714 714 if (attribute_length != 2) {
715 715 classfile_parse_error(
716 716 "Wrong size %u for field's Signature attribute in class file %s",
717 717 attribute_length, CHECK);
718 718 }
719 719 generic_signature_index = cfs->get_u2(CHECK);
720 720 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
721 721 runtime_visible_annotations_length = attribute_length;
722 722 runtime_visible_annotations = cfs->get_u1_buffer();
723 723 assert(runtime_visible_annotations != NULL, "null visible annotations");
724 724 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
725 725 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
726 726 runtime_invisible_annotations_length = attribute_length;
727 727 runtime_invisible_annotations = cfs->get_u1_buffer();
728 728 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
729 729 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
730 730 } else {
731 731 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
732 732 }
733 733 } else {
734 734 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
735 735 }
736 736 }
737 737
738 738 *constantvalue_index_addr = constantvalue_index;
739 739 *is_synthetic_addr = is_synthetic;
740 740 *generic_signature_index_addr = generic_signature_index;
741 741 *field_annotations = assemble_annotations(runtime_visible_annotations,
742 742 runtime_visible_annotations_length,
743 743 runtime_invisible_annotations,
744 744 runtime_invisible_annotations_length,
745 745 CHECK);
746 746 return;
747 747 }
748 748
749 749
750 750 // Field allocation types. Used for computing field offsets.
751 751
752 752 enum FieldAllocationType {
753 753 STATIC_OOP, // Oops
754 754 STATIC_BYTE, // Boolean, Byte, char
755 755 STATIC_SHORT, // shorts
756 756 STATIC_WORD, // ints
757 757 STATIC_DOUBLE, // long or double
758 758 STATIC_ALIGNED_DOUBLE,// aligned long or double
759 759 NONSTATIC_OOP,
760 760 NONSTATIC_BYTE,
761 761 NONSTATIC_SHORT,
762 762 NONSTATIC_WORD,
763 763 NONSTATIC_DOUBLE,
764 764 NONSTATIC_ALIGNED_DOUBLE
765 765 };
766 766
767 767
768 768 struct FieldAllocationCount {
769 769 unsigned int static_oop_count;
770 770 unsigned int static_byte_count;
771 771 unsigned int static_short_count;
772 772 unsigned int static_word_count;
773 773 unsigned int static_double_count;
774 774 unsigned int nonstatic_oop_count;
775 775 unsigned int nonstatic_byte_count;
776 776 unsigned int nonstatic_short_count;
777 777 unsigned int nonstatic_word_count;
778 778 unsigned int nonstatic_double_count;
779 779 };
780 780
781 781 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface,
782 782 struct FieldAllocationCount *fac,
783 783 objArrayHandle* fields_annotations, TRAPS) {
784 784 ClassFileStream* cfs = stream();
785 785 typeArrayHandle nullHandle;
786 786 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
787 787 u2 length = cfs->get_u2_fast();
788 788 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index]
789 789 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle));
790 790 typeArrayHandle fields(THREAD, new_fields);
791 791
792 792 int index = 0;
793 793 typeArrayHandle field_annotations;
794 794 for (int n = 0; n < length; n++) {
795 795 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
796 796
797 797 AccessFlags access_flags;
798 798 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
799 799 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle));
800 800 access_flags.set_flags(flags);
801 801
802 802 u2 name_index = cfs->get_u2_fast();
803 803 int cp_size = cp->length();
804 804 check_property(
805 805 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
806 806 "Invalid constant pool index %u for field name in class file %s",
807 807 name_index, CHECK_(nullHandle));
808 808 symbolHandle name(THREAD, cp->symbol_at(name_index));
809 809 verify_legal_field_name(name, CHECK_(nullHandle));
810 810
811 811 u2 signature_index = cfs->get_u2_fast();
812 812 check_property(
813 813 valid_cp_range(signature_index, cp_size) &&
814 814 cp->tag_at(signature_index).is_utf8(),
815 815 "Invalid constant pool index %u for field signature in class file %s",
816 816 signature_index, CHECK_(nullHandle));
817 817 symbolHandle sig(THREAD, cp->symbol_at(signature_index));
818 818 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
819 819
820 820 u2 constantvalue_index = 0;
821 821 bool is_synthetic = false;
822 822 u2 generic_signature_index = 0;
823 823 bool is_static = access_flags.is_static();
824 824
825 825 u2 attributes_count = cfs->get_u2_fast();
826 826 if (attributes_count > 0) {
827 827 parse_field_attributes(cp, attributes_count, is_static, signature_index,
828 828 &constantvalue_index, &is_synthetic,
829 829 &generic_signature_index, &field_annotations,
830 830 CHECK_(nullHandle));
831 831 if (field_annotations.not_null()) {
832 832 if (fields_annotations->is_null()) {
833 833 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
834 834 *fields_annotations = objArrayHandle(THREAD, md);
835 835 }
836 836 (*fields_annotations)->obj_at_put(n, field_annotations());
837 837 }
838 838 if (is_synthetic) {
839 839 access_flags.set_is_synthetic();
840 840 }
841 841 }
842 842
843 843 fields->short_at_put(index++, access_flags.as_short());
844 844 fields->short_at_put(index++, name_index);
845 845 fields->short_at_put(index++, signature_index);
846 846 fields->short_at_put(index++, constantvalue_index);
847 847
848 848 // Remember how many oops we encountered and compute allocation type
849 849 BasicType type = cp->basic_type_for_signature_at(signature_index);
850 850 FieldAllocationType atype;
851 851 if ( is_static ) {
852 852 switch ( type ) {
853 853 case T_BOOLEAN:
854 854 case T_BYTE:
855 855 fac->static_byte_count++;
856 856 atype = STATIC_BYTE;
857 857 break;
858 858 case T_LONG:
859 859 case T_DOUBLE:
860 860 if (Universe::field_type_should_be_aligned(type)) {
861 861 atype = STATIC_ALIGNED_DOUBLE;
862 862 } else {
863 863 atype = STATIC_DOUBLE;
864 864 }
865 865 fac->static_double_count++;
866 866 break;
867 867 case T_CHAR:
868 868 case T_SHORT:
869 869 fac->static_short_count++;
870 870 atype = STATIC_SHORT;
871 871 break;
872 872 case T_FLOAT:
873 873 case T_INT:
874 874 fac->static_word_count++;
875 875 atype = STATIC_WORD;
876 876 break;
877 877 case T_ARRAY:
878 878 case T_OBJECT:
879 879 fac->static_oop_count++;
880 880 atype = STATIC_OOP;
881 881 break;
882 882 case T_ADDRESS:
883 883 case T_VOID:
884 884 default:
885 885 assert(0, "bad field type");
886 886 }
887 887 } else {
888 888 switch ( type ) {
889 889 case T_BOOLEAN:
890 890 case T_BYTE:
891 891 fac->nonstatic_byte_count++;
892 892 atype = NONSTATIC_BYTE;
893 893 break;
894 894 case T_LONG:
895 895 case T_DOUBLE:
896 896 if (Universe::field_type_should_be_aligned(type)) {
897 897 atype = NONSTATIC_ALIGNED_DOUBLE;
898 898 } else {
899 899 atype = NONSTATIC_DOUBLE;
900 900 }
901 901 fac->nonstatic_double_count++;
902 902 break;
903 903 case T_CHAR:
904 904 case T_SHORT:
905 905 fac->nonstatic_short_count++;
906 906 atype = NONSTATIC_SHORT;
907 907 break;
908 908 case T_FLOAT:
909 909 case T_INT:
910 910 fac->nonstatic_word_count++;
911 911 atype = NONSTATIC_WORD;
912 912 break;
913 913 case T_ARRAY:
914 914 case T_OBJECT:
915 915 fac->nonstatic_oop_count++;
916 916 atype = NONSTATIC_OOP;
917 917 break;
918 918 case T_ADDRESS:
919 919 case T_VOID:
920 920 default:
921 921 assert(0, "bad field type");
922 922 }
923 923 }
924 924
925 925 // The correct offset is computed later (all oop fields will be located together)
926 926 // We temporarily store the allocation type in the offset field
927 927 fields->short_at_put(index++, atype);
928 928 fields->short_at_put(index++, 0); // Clear out high word of byte offset
929 929 fields->short_at_put(index++, generic_signature_index);
930 930 }
931 931
932 932 if (_need_verify && length > 1) {
933 933 // Check duplicated fields
934 934 ResourceMark rm(THREAD);
935 935 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
936 936 THREAD, NameSigHash*, HASH_ROW_SIZE);
937 937 initialize_hashtable(names_and_sigs);
938 938 bool dup = false;
939 939 {
940 940 debug_only(No_Safepoint_Verifier nsv;)
941 941 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) {
942 942 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
943 943 symbolOop name = cp->symbol_at(name_index);
944 944 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset);
945 945 symbolOop sig = cp->symbol_at(sig_index);
946 946 // If no duplicates, add name/signature in hashtable names_and_sigs.
947 947 if (!put_after_lookup(name, sig, names_and_sigs)) {
948 948 dup = true;
949 949 break;
950 950 }
951 951 }
952 952 }
953 953 if (dup) {
954 954 classfile_parse_error("Duplicate field name&signature in class file %s",
955 955 CHECK_(nullHandle));
956 956 }
957 957 }
958 958
959 959 return fields;
960 960 }
961 961
962 962
963 963 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
964 964 while (length-- > 0) {
965 965 *dest++ = Bytes::get_Java_u2((u1*) (src++));
966 966 }
967 967 }
968 968
969 969
970 970 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length,
971 971 u4 exception_table_length,
972 972 constantPoolHandle cp,
973 973 TRAPS) {
974 974 ClassFileStream* cfs = stream();
975 975 typeArrayHandle nullHandle;
976 976
977 977 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index]
978 978 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle));
979 979 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh);
980 980
981 981 int index = 0;
982 982 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index
983 983 for (unsigned int i = 0; i < exception_table_length; i++) {
984 984 u2 start_pc = cfs->get_u2_fast();
985 985 u2 end_pc = cfs->get_u2_fast();
986 986 u2 handler_pc = cfs->get_u2_fast();
987 987 u2 catch_type_index = cfs->get_u2_fast();
988 988 // Will check legal target after parsing code array in verifier.
989 989 if (_need_verify) {
990 990 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
991 991 "Illegal exception table range in class file %s", CHECK_(nullHandle));
992 992 guarantee_property(handler_pc < code_length,
993 993 "Illegal exception table handler in class file %s", CHECK_(nullHandle));
994 994 if (catch_type_index != 0) {
995 995 guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
996 996 is_klass_reference(cp, catch_type_index),
997 997 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle));
998 998 }
999 999 }
1000 1000 exception_handlers->int_at_put(index++, start_pc);
1001 1001 exception_handlers->int_at_put(index++, end_pc);
1002 1002 exception_handlers->int_at_put(index++, handler_pc);
1003 1003 exception_handlers->int_at_put(index++, catch_type_index);
1004 1004 }
1005 1005 return exception_handlers;
1006 1006 }
1007 1007
1008 1008 void ClassFileParser::parse_linenumber_table(
1009 1009 u4 code_attribute_length, u4 code_length,
1010 1010 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1011 1011 ClassFileStream* cfs = stream();
1012 1012 unsigned int num_entries = cfs->get_u2(CHECK);
1013 1013
1014 1014 // Each entry is a u2 start_pc, and a u2 line_number
1015 1015 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1016 1016
1017 1017 // Verify line number attribute and table length
1018 1018 check_property(
1019 1019 code_attribute_length == sizeof(u2) + length_in_bytes,
1020 1020 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1021 1021
1022 1022 cfs->guarantee_more(length_in_bytes, CHECK);
1023 1023
1024 1024 if ((*write_stream) == NULL) {
1025 1025 if (length_in_bytes > fixed_buffer_size) {
1026 1026 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1027 1027 } else {
1028 1028 (*write_stream) = new CompressedLineNumberWriteStream(
1029 1029 linenumbertable_buffer, fixed_buffer_size);
1030 1030 }
1031 1031 }
1032 1032
1033 1033 while (num_entries-- > 0) {
1034 1034 u2 bci = cfs->get_u2_fast(); // start_pc
1035 1035 u2 line = cfs->get_u2_fast(); // line_number
1036 1036 guarantee_property(bci < code_length,
1037 1037 "Invalid pc in LineNumberTable in class file %s", CHECK);
1038 1038 (*write_stream)->write_pair(bci, line);
1039 1039 }
1040 1040 }
1041 1041
1042 1042
1043 1043 // Class file LocalVariableTable elements.
1044 1044 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1045 1045 public:
1046 1046 u2 start_bci;
1047 1047 u2 length;
1048 1048 u2 name_cp_index;
1049 1049 u2 descriptor_cp_index;
1050 1050 u2 slot;
1051 1051 };
1052 1052
1053 1053
1054 1054 class LVT_Hash: public CHeapObj {
1055 1055 public:
1056 1056 LocalVariableTableElement *_elem; // element
1057 1057 LVT_Hash* _next; // Next entry in hash table
1058 1058 };
1059 1059
1060 1060 unsigned int hash(LocalVariableTableElement *elem) {
1061 1061 unsigned int raw_hash = elem->start_bci;
1062 1062
1063 1063 raw_hash = elem->length + raw_hash * 37;
1064 1064 raw_hash = elem->name_cp_index + raw_hash * 37;
1065 1065 raw_hash = elem->slot + raw_hash * 37;
1066 1066
1067 1067 return raw_hash % HASH_ROW_SIZE;
1068 1068 }
1069 1069
1070 1070 void initialize_hashtable(LVT_Hash** table) {
1071 1071 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1072 1072 table[i] = NULL;
1073 1073 }
1074 1074 }
1075 1075
1076 1076 void clear_hashtable(LVT_Hash** table) {
1077 1077 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1078 1078 LVT_Hash* current = table[i];
1079 1079 LVT_Hash* next;
1080 1080 while (current != NULL) {
1081 1081 next = current->_next;
1082 1082 current->_next = NULL;
1083 1083 delete(current);
1084 1084 current = next;
1085 1085 }
1086 1086 table[i] = NULL;
1087 1087 }
1088 1088 }
1089 1089
1090 1090 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1091 1091 LVT_Hash* entry = table[index];
1092 1092
1093 1093 /*
1094 1094 * 3-tuple start_bci/length/slot has to be unique key,
1095 1095 * so the following comparison seems to be redundant:
1096 1096 * && elem->name_cp_index == entry->_elem->name_cp_index
1097 1097 */
1098 1098 while (entry != NULL) {
1099 1099 if (elem->start_bci == entry->_elem->start_bci
1100 1100 && elem->length == entry->_elem->length
1101 1101 && elem->name_cp_index == entry->_elem->name_cp_index
1102 1102 && elem->slot == entry->_elem->slot
1103 1103 ) {
1104 1104 return entry;
1105 1105 }
1106 1106 entry = entry->_next;
1107 1107 }
1108 1108 return NULL;
1109 1109 }
1110 1110
1111 1111 // Return false if the local variable is found in table.
1112 1112 // Return true if no duplicate is found.
1113 1113 // And local variable is added as a new entry in table.
1114 1114 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1115 1115 // First lookup for duplicates
1116 1116 int index = hash(elem);
1117 1117 LVT_Hash* entry = LVT_lookup(elem, index, table);
1118 1118
1119 1119 if (entry != NULL) {
1120 1120 return false;
1121 1121 }
1122 1122 // No duplicate is found, allocate a new entry and fill it.
1123 1123 if ((entry = new LVT_Hash()) == NULL) {
1124 1124 return false;
1125 1125 }
1126 1126 entry->_elem = elem;
1127 1127
1128 1128 // Insert into hash table
1129 1129 entry->_next = table[index];
1130 1130 table[index] = entry;
1131 1131
1132 1132 return true;
1133 1133 }
1134 1134
1135 1135 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1136 1136 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1137 1137 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1138 1138 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1139 1139 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1140 1140 lvt->signature_cp_index = 0;
1141 1141 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1142 1142 }
1143 1143
1144 1144 // Function is used to parse both attributes:
1145 1145 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1146 1146 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1147 1147 u2 max_locals,
1148 1148 u4 code_attribute_length,
1149 1149 constantPoolHandle cp,
1150 1150 u2* localvariable_table_length,
1151 1151 bool isLVTT,
1152 1152 TRAPS) {
1153 1153 ClassFileStream* cfs = stream();
1154 1154 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1155 1155 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1156 1156 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1157 1157 // Verify local variable table attribute has right length
1158 1158 if (_need_verify) {
1159 1159 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1160 1160 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1161 1161 }
1162 1162 u2* localvariable_table_start = cfs->get_u2_buffer();
1163 1163 assert(localvariable_table_start != NULL, "null local variable table");
1164 1164 if (!_need_verify) {
1165 1165 cfs->skip_u2_fast(size);
1166 1166 } else {
1167 1167 cfs->guarantee_more(size * 2, CHECK_NULL);
1168 1168 for(int i = 0; i < (*localvariable_table_length); i++) {
1169 1169 u2 start_pc = cfs->get_u2_fast();
1170 1170 u2 length = cfs->get_u2_fast();
1171 1171 u2 name_index = cfs->get_u2_fast();
1172 1172 u2 descriptor_index = cfs->get_u2_fast();
1173 1173 u2 index = cfs->get_u2_fast();
1174 1174 // Assign to a u4 to avoid overflow
1175 1175 u4 end_pc = (u4)start_pc + (u4)length;
1176 1176
1177 1177 if (start_pc >= code_length) {
1178 1178 classfile_parse_error(
1179 1179 "Invalid start_pc %u in %s in class file %s",
1180 1180 start_pc, tbl_name, CHECK_NULL);
1181 1181 }
1182 1182 if (end_pc > code_length) {
1183 1183 classfile_parse_error(
1184 1184 "Invalid length %u in %s in class file %s",
1185 1185 length, tbl_name, CHECK_NULL);
1186 1186 }
1187 1187 int cp_size = cp->length();
1188 1188 guarantee_property(
1189 1189 valid_cp_range(name_index, cp_size) &&
1190 1190 cp->tag_at(name_index).is_utf8(),
1191 1191 "Name index %u in %s has bad constant type in class file %s",
1192 1192 name_index, tbl_name, CHECK_NULL);
1193 1193 guarantee_property(
1194 1194 valid_cp_range(descriptor_index, cp_size) &&
1195 1195 cp->tag_at(descriptor_index).is_utf8(),
1196 1196 "Signature index %u in %s has bad constant type in class file %s",
1197 1197 descriptor_index, tbl_name, CHECK_NULL);
1198 1198
1199 1199 symbolHandle name(THREAD, cp->symbol_at(name_index));
1200 1200 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index));
1201 1201 verify_legal_field_name(name, CHECK_NULL);
1202 1202 u2 extra_slot = 0;
1203 1203 if (!isLVTT) {
1204 1204 verify_legal_field_signature(name, sig, CHECK_NULL);
1205 1205
1206 1206 // 4894874: check special cases for double and long local variables
1207 1207 if (sig() == vmSymbols::type_signature(T_DOUBLE) ||
1208 1208 sig() == vmSymbols::type_signature(T_LONG)) {
1209 1209 extra_slot = 1;
1210 1210 }
1211 1211 }
1212 1212 guarantee_property((index + extra_slot) < max_locals,
1213 1213 "Invalid index %u in %s in class file %s",
1214 1214 index, tbl_name, CHECK_NULL);
1215 1215 }
1216 1216 }
1217 1217 return localvariable_table_start;
1218 1218 }
1219 1219
1220 1220
1221 1221 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1222 1222 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1223 1223 ClassFileStream* cfs = stream();
1224 1224 u2 index = 0; // index in the array with long/double occupying two slots
1225 1225 u4 i1 = *u1_index;
1226 1226 u4 i2 = *u2_index + 1;
1227 1227 for(int i = 0; i < array_length; i++) {
1228 1228 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1229 1229 index++;
1230 1230 if (tag == ITEM_Long || tag == ITEM_Double) {
1231 1231 index++;
1232 1232 } else if (tag == ITEM_Object) {
1233 1233 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1234 1234 guarantee_property(valid_cp_range(class_index, cp->length()) &&
1235 1235 is_klass_reference(cp, class_index),
1236 1236 "Bad class index %u in StackMap in class file %s",
1237 1237 class_index, CHECK);
1238 1238 } else if (tag == ITEM_Uninitialized) {
1239 1239 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1240 1240 guarantee_property(
1241 1241 offset < code_length,
1242 1242 "Bad uninitialized type offset %u in StackMap in class file %s",
1243 1243 offset, CHECK);
1244 1244 } else {
1245 1245 guarantee_property(
1246 1246 tag <= (u1)ITEM_Uninitialized,
1247 1247 "Unknown variable type %u in StackMap in class file %s",
1248 1248 tag, CHECK);
1249 1249 }
1250 1250 }
1251 1251 u2_array[*u2_index] = index;
1252 1252 *u1_index = i1;
1253 1253 *u2_index = i2;
1254 1254 }
1255 1255
1256 1256 typeArrayOop ClassFileParser::parse_stackmap_table(
1257 1257 u4 code_attribute_length, TRAPS) {
1258 1258 if (code_attribute_length == 0)
1259 1259 return NULL;
1260 1260
1261 1261 ClassFileStream* cfs = stream();
1262 1262 u1* stackmap_table_start = cfs->get_u1_buffer();
1263 1263 assert(stackmap_table_start != NULL, "null stackmap table");
1264 1264
1265 1265 // check code_attribute_length first
1266 1266 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1267 1267
1268 1268 if (!_need_verify && !DumpSharedSpaces) {
1269 1269 return NULL;
1270 1270 }
1271 1271
1272 1272 typeArrayOop stackmap_data =
1273 1273 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
1274 1274
1275 1275 stackmap_data->set_length(code_attribute_length);
1276 1276 memcpy((void*)stackmap_data->byte_at_addr(0),
1277 1277 (void*)stackmap_table_start, code_attribute_length);
1278 1278 return stackmap_data;
1279 1279 }
1280 1280
1281 1281 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1282 1282 u4 method_attribute_length,
1283 1283 constantPoolHandle cp, TRAPS) {
1284 1284 ClassFileStream* cfs = stream();
1285 1285 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1286 1286 *checked_exceptions_length = cfs->get_u2_fast();
1287 1287 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1288 1288 u2* checked_exceptions_start = cfs->get_u2_buffer();
1289 1289 assert(checked_exceptions_start != NULL, "null checked exceptions");
1290 1290 if (!_need_verify) {
1291 1291 cfs->skip_u2_fast(size);
1292 1292 } else {
1293 1293 // Verify each value in the checked exception table
1294 1294 u2 checked_exception;
1295 1295 u2 len = *checked_exceptions_length;
1296 1296 cfs->guarantee_more(2 * len, CHECK_NULL);
1297 1297 for (int i = 0; i < len; i++) {
1298 1298 checked_exception = cfs->get_u2_fast();
1299 1299 check_property(
1300 1300 valid_cp_range(checked_exception, cp->length()) &&
1301 1301 is_klass_reference(cp, checked_exception),
1302 1302 "Exception name has bad type at constant pool %u in class file %s",
1303 1303 checked_exception, CHECK_NULL);
1304 1304 }
1305 1305 }
1306 1306 // check exceptions attribute length
1307 1307 if (_need_verify) {
1308 1308 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1309 1309 sizeof(u2) * size),
1310 1310 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1311 1311 }
1312 1312 return checked_exceptions_start;
1313 1313 }
1314 1314
1315 1315
1316 1316 #define MAX_ARGS_SIZE 255
1317 1317 #define MAX_CODE_SIZE 65535
1318 1318 #define INITIAL_MAX_LVT_NUMBER 256
1319 1319
1320 1320 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1321 1321 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the
1322 1322 // methodOop to save footprint, so we only know the size of the resulting methodOop when the
1323 1323 // entire method attribute is parsed.
1324 1324 //
1325 1325 // The promoted_flags parameter is used to pass relevant access_flags
1326 1326 // from the method back up to the containing klass. These flag values
1327 1327 // are added to klass's access_flags.
1328 1328
1329 1329 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface,
1330 1330 AccessFlags *promoted_flags,
1331 1331 typeArrayHandle* method_annotations,
1332 1332 typeArrayHandle* method_parameter_annotations,
1333 1333 typeArrayHandle* method_default_annotations,
1334 1334 TRAPS) {
1335 1335 ClassFileStream* cfs = stream();
1336 1336 methodHandle nullHandle;
1337 1337 ResourceMark rm(THREAD);
1338 1338 // Parse fixed parts
1339 1339 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1340 1340
1341 1341 int flags = cfs->get_u2_fast();
1342 1342 u2 name_index = cfs->get_u2_fast();
1343 1343 int cp_size = cp->length();
1344 1344 check_property(
1345 1345 valid_cp_range(name_index, cp_size) &&
1346 1346 cp->tag_at(name_index).is_utf8(),
1347 1347 "Illegal constant pool index %u for method name in class file %s",
1348 1348 name_index, CHECK_(nullHandle));
1349 1349 symbolHandle name(THREAD, cp->symbol_at(name_index));
1350 1350 verify_legal_method_name(name, CHECK_(nullHandle));
1351 1351
1352 1352 u2 signature_index = cfs->get_u2_fast();
1353 1353 guarantee_property(
1354 1354 valid_cp_range(signature_index, cp_size) &&
1355 1355 cp->tag_at(signature_index).is_utf8(),
1356 1356 "Illegal constant pool index %u for method signature in class file %s",
1357 1357 signature_index, CHECK_(nullHandle));
1358 1358 symbolHandle signature(THREAD, cp->symbol_at(signature_index));
1359 1359
1360 1360 AccessFlags access_flags;
1361 1361 if (name == vmSymbols::class_initializer_name()) {
1362 1362 // We ignore the access flags for a class initializer. (JVM Spec. p. 116)
1363 1363 flags = JVM_ACC_STATIC;
1364 1364 } else {
1365 1365 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1366 1366 }
1367 1367
1368 1368 int args_size = -1; // only used when _need_verify is true
1369 1369 if (_need_verify) {
1370 1370 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1371 1371 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1372 1372 if (args_size > MAX_ARGS_SIZE) {
1373 1373 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1374 1374 }
1375 1375 }
1376 1376
1377 1377 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1378 1378
1379 1379 // Default values for code and exceptions attribute elements
1380 1380 u2 max_stack = 0;
1381 1381 u2 max_locals = 0;
1382 1382 u4 code_length = 0;
1383 1383 u1* code_start = 0;
1384 1384 u2 exception_table_length = 0;
1385 1385 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1386 1386 u2 checked_exceptions_length = 0;
1387 1387 u2* checked_exceptions_start = NULL;
1388 1388 CompressedLineNumberWriteStream* linenumber_table = NULL;
1389 1389 int linenumber_table_length = 0;
1390 1390 int total_lvt_length = 0;
1391 1391 u2 lvt_cnt = 0;
1392 1392 u2 lvtt_cnt = 0;
1393 1393 bool lvt_allocated = false;
1394 1394 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1395 1395 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1396 1396 u2* localvariable_table_length;
1397 1397 u2** localvariable_table_start;
1398 1398 u2* localvariable_type_table_length;
1399 1399 u2** localvariable_type_table_start;
1400 1400 bool parsed_code_attribute = false;
1401 1401 bool parsed_checked_exceptions_attribute = false;
1402 1402 bool parsed_stackmap_attribute = false;
1403 1403 // stackmap attribute - JDK1.5
1404 1404 typeArrayHandle stackmap_data;
1405 1405 u2 generic_signature_index = 0;
1406 1406 u1* runtime_visible_annotations = NULL;
1407 1407 int runtime_visible_annotations_length = 0;
1408 1408 u1* runtime_invisible_annotations = NULL;
1409 1409 int runtime_invisible_annotations_length = 0;
1410 1410 u1* runtime_visible_parameter_annotations = NULL;
1411 1411 int runtime_visible_parameter_annotations_length = 0;
1412 1412 u1* runtime_invisible_parameter_annotations = NULL;
1413 1413 int runtime_invisible_parameter_annotations_length = 0;
1414 1414 u1* annotation_default = NULL;
1415 1415 int annotation_default_length = 0;
1416 1416
1417 1417 // Parse code and exceptions attribute
1418 1418 u2 method_attributes_count = cfs->get_u2_fast();
1419 1419 while (method_attributes_count--) {
1420 1420 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1421 1421 u2 method_attribute_name_index = cfs->get_u2_fast();
1422 1422 u4 method_attribute_length = cfs->get_u4_fast();
1423 1423 check_property(
1424 1424 valid_cp_range(method_attribute_name_index, cp_size) &&
1425 1425 cp->tag_at(method_attribute_name_index).is_utf8(),
1426 1426 "Invalid method attribute name index %u in class file %s",
1427 1427 method_attribute_name_index, CHECK_(nullHandle));
1428 1428
1429 1429 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index);
1430 1430 if (method_attribute_name == vmSymbols::tag_code()) {
1431 1431 // Parse Code attribute
1432 1432 if (_need_verify) {
1433 1433 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1434 1434 "Code attribute in native or abstract methods in class file %s",
1435 1435 CHECK_(nullHandle));
1436 1436 }
1437 1437 if (parsed_code_attribute) {
1438 1438 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1439 1439 }
1440 1440 parsed_code_attribute = true;
1441 1441
1442 1442 // Stack size, locals size, and code size
1443 1443 if (_major_version == 45 && _minor_version <= 2) {
1444 1444 cfs->guarantee_more(4, CHECK_(nullHandle));
1445 1445 max_stack = cfs->get_u1_fast();
1446 1446 max_locals = cfs->get_u1_fast();
1447 1447 code_length = cfs->get_u2_fast();
1448 1448 } else {
1449 1449 cfs->guarantee_more(8, CHECK_(nullHandle));
1450 1450 max_stack = cfs->get_u2_fast();
1451 1451 max_locals = cfs->get_u2_fast();
1452 1452 code_length = cfs->get_u4_fast();
1453 1453 }
1454 1454 if (_need_verify) {
1455 1455 guarantee_property(args_size <= max_locals,
1456 1456 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1457 1457 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1458 1458 "Invalid method Code length %u in class file %s",
1459 1459 code_length, CHECK_(nullHandle));
1460 1460 }
1461 1461 // Code pointer
1462 1462 code_start = cfs->get_u1_buffer();
1463 1463 assert(code_start != NULL, "null code start");
1464 1464 cfs->guarantee_more(code_length, CHECK_(nullHandle));
1465 1465 cfs->skip_u1_fast(code_length);
1466 1466
1467 1467 // Exception handler table
1468 1468 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
1469 1469 exception_table_length = cfs->get_u2_fast();
1470 1470 if (exception_table_length > 0) {
1471 1471 exception_handlers =
1472 1472 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle));
1473 1473 }
1474 1474
1475 1475 // Parse additional attributes in code attribute
1476 1476 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
1477 1477 u2 code_attributes_count = cfs->get_u2_fast();
1478 1478
1479 1479 unsigned int calculated_attribute_length = 0;
1480 1480
1481 1481 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1482 1482 calculated_attribute_length =
1483 1483 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1484 1484 } else {
1485 1485 // max_stack, locals and length are smaller in pre-version 45.2 classes
1486 1486 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1487 1487 }
1488 1488 calculated_attribute_length +=
1489 1489 code_length +
1490 1490 sizeof(exception_table_length) +
1491 1491 sizeof(code_attributes_count) +
1492 1492 exception_table_length *
1493 1493 ( sizeof(u2) + // start_pc
1494 1494 sizeof(u2) + // end_pc
1495 1495 sizeof(u2) + // handler_pc
1496 1496 sizeof(u2) ); // catch_type_index
1497 1497
1498 1498 while (code_attributes_count--) {
1499 1499 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
1500 1500 u2 code_attribute_name_index = cfs->get_u2_fast();
1501 1501 u4 code_attribute_length = cfs->get_u4_fast();
1502 1502 calculated_attribute_length += code_attribute_length +
1503 1503 sizeof(code_attribute_name_index) +
1504 1504 sizeof(code_attribute_length);
1505 1505 check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
1506 1506 cp->tag_at(code_attribute_name_index).is_utf8(),
1507 1507 "Invalid code attribute name index %u in class file %s",
1508 1508 code_attribute_name_index,
1509 1509 CHECK_(nullHandle));
1510 1510 if (LoadLineNumberTables &&
1511 1511 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
1512 1512 // Parse and compress line number table
1513 1513 parse_linenumber_table(code_attribute_length, code_length,
1514 1514 &linenumber_table, CHECK_(nullHandle));
1515 1515
1516 1516 } else if (LoadLocalVariableTables &&
1517 1517 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
1518 1518 // Parse local variable table
1519 1519 if (!lvt_allocated) {
1520 1520 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1521 1521 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1522 1522 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1523 1523 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1524 1524 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1525 1525 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1526 1526 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1527 1527 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1528 1528 lvt_allocated = true;
1529 1529 }
1530 1530 if (lvt_cnt == max_lvt_cnt) {
1531 1531 max_lvt_cnt <<= 1;
1532 1532 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
1533 1533 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
1534 1534 }
1535 1535 localvariable_table_start[lvt_cnt] =
1536 1536 parse_localvariable_table(code_length,
1537 1537 max_locals,
1538 1538 code_attribute_length,
1539 1539 cp,
1540 1540 &localvariable_table_length[lvt_cnt],
1541 1541 false, // is not LVTT
1542 1542 CHECK_(nullHandle));
1543 1543 total_lvt_length += localvariable_table_length[lvt_cnt];
1544 1544 lvt_cnt++;
1545 1545 } else if (LoadLocalVariableTypeTables &&
1546 1546 _major_version >= JAVA_1_5_VERSION &&
1547 1547 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
1548 1548 if (!lvt_allocated) {
1549 1549 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1550 1550 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1551 1551 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1552 1552 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1553 1553 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1554 1554 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1555 1555 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1556 1556 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1557 1557 lvt_allocated = true;
1558 1558 }
1559 1559 // Parse local variable type table
1560 1560 if (lvtt_cnt == max_lvtt_cnt) {
1561 1561 max_lvtt_cnt <<= 1;
1562 1562 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
1563 1563 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
1564 1564 }
1565 1565 localvariable_type_table_start[lvtt_cnt] =
1566 1566 parse_localvariable_table(code_length,
1567 1567 max_locals,
1568 1568 code_attribute_length,
1569 1569 cp,
1570 1570 &localvariable_type_table_length[lvtt_cnt],
1571 1571 true, // is LVTT
1572 1572 CHECK_(nullHandle));
1573 1573 lvtt_cnt++;
1574 1574 } else if (UseSplitVerifier &&
1575 1575 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
1576 1576 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
1577 1577 // Stack map is only needed by the new verifier in JDK1.5.
1578 1578 if (parsed_stackmap_attribute) {
1579 1579 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
1580 1580 }
1581 1581 typeArrayOop sm =
1582 1582 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
1583 1583 stackmap_data = typeArrayHandle(THREAD, sm);
1584 1584 parsed_stackmap_attribute = true;
1585 1585 } else {
1586 1586 // Skip unknown attributes
1587 1587 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
1588 1588 }
1589 1589 }
1590 1590 // check method attribute length
1591 1591 if (_need_verify) {
1592 1592 guarantee_property(method_attribute_length == calculated_attribute_length,
1593 1593 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
1594 1594 }
1595 1595 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
1596 1596 // Parse Exceptions attribute
1597 1597 if (parsed_checked_exceptions_attribute) {
1598 1598 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
1599 1599 }
1600 1600 parsed_checked_exceptions_attribute = true;
1601 1601 checked_exceptions_start =
1602 1602 parse_checked_exceptions(&checked_exceptions_length,
1603 1603 method_attribute_length,
1604 1604 cp, CHECK_(nullHandle));
1605 1605 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
1606 1606 if (method_attribute_length != 0) {
1607 1607 classfile_parse_error(
1608 1608 "Invalid Synthetic method attribute length %u in class file %s",
1609 1609 method_attribute_length, CHECK_(nullHandle));
1610 1610 }
1611 1611 // Should we check that there hasn't already been a synthetic attribute?
1612 1612 access_flags.set_is_synthetic();
1613 1613 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1614 1614 if (method_attribute_length != 0) {
1615 1615 classfile_parse_error(
1616 1616 "Invalid Deprecated method attribute length %u in class file %s",
1617 1617 method_attribute_length, CHECK_(nullHandle));
1618 1618 }
1619 1619 } else if (_major_version >= JAVA_1_5_VERSION) {
1620 1620 if (method_attribute_name == vmSymbols::tag_signature()) {
1621 1621 if (method_attribute_length != 2) {
1622 1622 classfile_parse_error(
1623 1623 "Invalid Signature attribute length %u in class file %s",
1624 1624 method_attribute_length, CHECK_(nullHandle));
1625 1625 }
1626 1626 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
1627 1627 generic_signature_index = cfs->get_u2_fast();
1628 1628 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1629 1629 runtime_visible_annotations_length = method_attribute_length;
1630 1630 runtime_visible_annotations = cfs->get_u1_buffer();
1631 1631 assert(runtime_visible_annotations != NULL, "null visible annotations");
1632 1632 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
1633 1633 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1634 1634 runtime_invisible_annotations_length = method_attribute_length;
1635 1635 runtime_invisible_annotations = cfs->get_u1_buffer();
1636 1636 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1637 1637 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
1638 1638 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
1639 1639 runtime_visible_parameter_annotations_length = method_attribute_length;
1640 1640 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
1641 1641 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
1642 1642 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
1643 1643 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
1644 1644 runtime_invisible_parameter_annotations_length = method_attribute_length;
1645 1645 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
1646 1646 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
1647 1647 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
1648 1648 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
1649 1649 annotation_default_length = method_attribute_length;
1650 1650 annotation_default = cfs->get_u1_buffer();
1651 1651 assert(annotation_default != NULL, "null annotation default");
1652 1652 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
1653 1653 } else {
1654 1654 // Skip unknown attributes
1655 1655 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1656 1656 }
1657 1657 } else {
1658 1658 // Skip unknown attributes
1659 1659 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1660 1660 }
1661 1661 }
1662 1662
1663 1663 if (linenumber_table != NULL) {
1664 1664 linenumber_table->write_terminator();
1665 1665 linenumber_table_length = linenumber_table->position();
1666 1666 }
1667 1667
1668 1668 // Make sure there's at least one Code attribute in non-native/non-abstract method
1669 1669 if (_need_verify) {
1670 1670 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
1671 1671 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
1672 1672 }
1673 1673
1674 1674 // All sizing information for a methodOop is finally available, now create it
1675 1675 methodOop m_oop = oopFactory::new_method(
1676 1676 code_length, access_flags, linenumber_table_length,
1677 1677 total_lvt_length, checked_exceptions_length,
1678 1678 methodOopDesc::IsSafeConc, CHECK_(nullHandle));
1679 1679 methodHandle m (THREAD, m_oop);
1680 1680
1681 1681 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize);
1682 1682
1683 1683 // Fill in information from fixed part (access_flags already set)
1684 1684 m->set_constants(cp());
1685 1685 m->set_name_index(name_index);
1686 1686 m->set_signature_index(signature_index);
1687 1687 m->set_generic_signature_index(generic_signature_index);
1688 1688 #ifdef CC_INTERP
1689 1689 // hmm is there a gc issue here??
1690 1690 ResultTypeFinder rtf(cp->symbol_at(signature_index));
1691 1691 m->set_result_index(rtf.type());
1692 1692 #endif
1693 1693
1694 1694 if (args_size >= 0) {
1695 1695 m->set_size_of_parameters(args_size);
1696 1696 } else {
1697 1697 m->compute_size_of_parameters(THREAD);
1698 1698 }
1699 1699 #ifdef ASSERT
1700 1700 if (args_size >= 0) {
1701 1701 m->compute_size_of_parameters(THREAD);
1702 1702 assert(args_size == m->size_of_parameters(), "");
1703 1703 }
1704 1704 #endif
1705 1705
1706 1706 // Fill in code attribute information
1707 1707 m->set_max_stack(max_stack);
1708 1708 m->set_max_locals(max_locals);
1709 1709 m->constMethod()->set_stackmap_data(stackmap_data());
1710 1710
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1711 1711 /**
1712 1712 * The exception_table field is the flag used to indicate
1713 1713 * that the methodOop and it's associated constMethodOop are partially
1714 1714 * initialized and thus are exempt from pre/post GC verification. Once
1715 1715 * the field is set, the oops are considered fully initialized so make
1716 1716 * sure that the oops can pass verification when this field is set.
1717 1717 */
1718 1718 m->set_exception_table(exception_handlers());
1719 1719
1720 1720 // Copy byte codes
1721 - if (code_length > 0) {
1722 - memcpy(m->code_base(), code_start, code_length);
1723 - }
1721 + m->set_code(code_start);
1724 1722
1725 1723 // Copy line number table
1726 1724 if (linenumber_table != NULL) {
1727 1725 memcpy(m->compressed_linenumber_table(),
1728 1726 linenumber_table->buffer(), linenumber_table_length);
1729 1727 }
1730 1728
1731 1729 // Copy checked exceptions
1732 1730 if (checked_exceptions_length > 0) {
1733 1731 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
1734 1732 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
1735 1733 }
1736 1734
1737 1735 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1738 1736 *
1739 1737 * Rules for LVT's and LVTT's are:
1740 1738 * - There can be any number of LVT's and LVTT's.
1741 1739 * - If there are n LVT's, it is the same as if there was just
1742 1740 * one LVT containing all the entries from the n LVT's.
1743 1741 * - There may be no more than one LVT entry per local variable.
1744 1742 * Two LVT entries are 'equal' if these fields are the same:
1745 1743 * start_pc, length, name, slot
1746 1744 * - There may be no more than one LVTT entry per each LVT entry.
1747 1745 * Each LVTT entry has to match some LVT entry.
1748 1746 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
1749 1747 */
1750 1748 if (total_lvt_length > 0) {
1751 1749 int tbl_no, idx;
1752 1750
1753 1751 promoted_flags->set_has_localvariable_table();
1754 1752
1755 1753 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
1756 1754 initialize_hashtable(lvt_Hash);
1757 1755
1758 1756 // To fill LocalVariableTable in
1759 1757 Classfile_LVT_Element* cf_lvt;
1760 1758 LocalVariableTableElement* lvt = m->localvariable_table_start();
1761 1759
1762 1760 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
1763 1761 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
1764 1762 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
1765 1763 copy_lvt_element(&cf_lvt[idx], lvt);
1766 1764 // If no duplicates, add LVT elem in hashtable lvt_Hash.
1767 1765 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
1768 1766 && _need_verify
1769 1767 && _major_version >= JAVA_1_5_VERSION ) {
1770 1768 clear_hashtable(lvt_Hash);
1771 1769 classfile_parse_error("Duplicated LocalVariableTable attribute "
1772 1770 "entry for '%s' in class file %s",
1773 1771 cp->symbol_at(lvt->name_cp_index)->as_utf8(),
1774 1772 CHECK_(nullHandle));
1775 1773 }
1776 1774 }
1777 1775 }
1778 1776
1779 1777 // To merge LocalVariableTable and LocalVariableTypeTable
1780 1778 Classfile_LVT_Element* cf_lvtt;
1781 1779 LocalVariableTableElement lvtt_elem;
1782 1780
1783 1781 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
1784 1782 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
1785 1783 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
1786 1784 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
1787 1785 int index = hash(&lvtt_elem);
1788 1786 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
1789 1787 if (entry == NULL) {
1790 1788 if (_need_verify) {
1791 1789 clear_hashtable(lvt_Hash);
1792 1790 classfile_parse_error("LVTT entry for '%s' in class file %s "
1793 1791 "does not match any LVT entry",
1794 1792 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1795 1793 CHECK_(nullHandle));
1796 1794 }
1797 1795 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
1798 1796 clear_hashtable(lvt_Hash);
1799 1797 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
1800 1798 "entry for '%s' in class file %s",
1801 1799 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1802 1800 CHECK_(nullHandle));
1803 1801 } else {
1804 1802 // to add generic signatures into LocalVariableTable
1805 1803 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
1806 1804 }
1807 1805 }
1808 1806 }
1809 1807 clear_hashtable(lvt_Hash);
1810 1808 }
1811 1809
1812 1810 *method_annotations = assemble_annotations(runtime_visible_annotations,
1813 1811 runtime_visible_annotations_length,
1814 1812 runtime_invisible_annotations,
1815 1813 runtime_invisible_annotations_length,
1816 1814 CHECK_(nullHandle));
1817 1815 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
1818 1816 runtime_visible_parameter_annotations_length,
1819 1817 runtime_invisible_parameter_annotations,
1820 1818 runtime_invisible_parameter_annotations_length,
1821 1819 CHECK_(nullHandle));
1822 1820 *method_default_annotations = assemble_annotations(annotation_default,
1823 1821 annotation_default_length,
1824 1822 NULL,
1825 1823 0,
1826 1824 CHECK_(nullHandle));
1827 1825
1828 1826 if (name() == vmSymbols::finalize_method_name() &&
1829 1827 signature() == vmSymbols::void_method_signature()) {
1830 1828 if (m->is_empty_method()) {
1831 1829 _has_empty_finalizer = true;
1832 1830 } else {
1833 1831 _has_finalizer = true;
1834 1832 }
1835 1833 }
1836 1834 if (name() == vmSymbols::object_initializer_name() &&
1837 1835 signature() == vmSymbols::void_method_signature() &&
1838 1836 m->is_vanilla_constructor()) {
1839 1837 _has_vanilla_constructor = true;
1840 1838 }
1841 1839
1842 1840 if (EnableMethodHandles && m->is_method_handle_invoke()) {
1843 1841 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
1844 1842 "Method handle invokers must be defined internally to the VM", nullHandle);
1845 1843 }
1846 1844
1847 1845 return m;
1848 1846 }
1849 1847
1850 1848
1851 1849 // The promoted_flags parameter is used to pass relevant access_flags
1852 1850 // from the methods back up to the containing klass. These flag values
1853 1851 // are added to klass's access_flags.
1854 1852
1855 1853 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
1856 1854 AccessFlags* promoted_flags,
1857 1855 bool* has_final_method,
1858 1856 objArrayOop* methods_annotations_oop,
1859 1857 objArrayOop* methods_parameter_annotations_oop,
1860 1858 objArrayOop* methods_default_annotations_oop,
1861 1859 TRAPS) {
1862 1860 ClassFileStream* cfs = stream();
1863 1861 objArrayHandle nullHandle;
1864 1862 typeArrayHandle method_annotations;
1865 1863 typeArrayHandle method_parameter_annotations;
1866 1864 typeArrayHandle method_default_annotations;
1867 1865 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
1868 1866 u2 length = cfs->get_u2_fast();
1869 1867 if (length == 0) {
1870 1868 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
1871 1869 } else {
1872 1870 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1873 1871 objArrayHandle methods(THREAD, m);
1874 1872 HandleMark hm(THREAD);
1875 1873 objArrayHandle methods_annotations;
1876 1874 objArrayHandle methods_parameter_annotations;
1877 1875 objArrayHandle methods_default_annotations;
1878 1876 for (int index = 0; index < length; index++) {
1879 1877 methodHandle method = parse_method(cp, is_interface,
1880 1878 promoted_flags,
1881 1879 &method_annotations,
1882 1880 &method_parameter_annotations,
1883 1881 &method_default_annotations,
1884 1882 CHECK_(nullHandle));
1885 1883 if (method->is_final()) {
1886 1884 *has_final_method = true;
1887 1885 }
1888 1886 methods->obj_at_put(index, method());
1889 1887 if (method_annotations.not_null()) {
1890 1888 if (methods_annotations.is_null()) {
1891 1889 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1892 1890 methods_annotations = objArrayHandle(THREAD, md);
1893 1891 }
1894 1892 methods_annotations->obj_at_put(index, method_annotations());
1895 1893 }
1896 1894 if (method_parameter_annotations.not_null()) {
1897 1895 if (methods_parameter_annotations.is_null()) {
1898 1896 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1899 1897 methods_parameter_annotations = objArrayHandle(THREAD, md);
1900 1898 }
1901 1899 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
1902 1900 }
1903 1901 if (method_default_annotations.not_null()) {
1904 1902 if (methods_default_annotations.is_null()) {
1905 1903 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1906 1904 methods_default_annotations = objArrayHandle(THREAD, md);
1907 1905 }
1908 1906 methods_default_annotations->obj_at_put(index, method_default_annotations());
1909 1907 }
1910 1908 }
1911 1909 if (_need_verify && length > 1) {
1912 1910 // Check duplicated methods
1913 1911 ResourceMark rm(THREAD);
1914 1912 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1915 1913 THREAD, NameSigHash*, HASH_ROW_SIZE);
1916 1914 initialize_hashtable(names_and_sigs);
1917 1915 bool dup = false;
1918 1916 {
1919 1917 debug_only(No_Safepoint_Verifier nsv;)
1920 1918 for (int i = 0; i < length; i++) {
1921 1919 methodOop m = (methodOop)methods->obj_at(i);
1922 1920 // If no duplicates, add name/signature in hashtable names_and_sigs.
1923 1921 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
1924 1922 dup = true;
1925 1923 break;
1926 1924 }
1927 1925 }
1928 1926 }
1929 1927 if (dup) {
1930 1928 classfile_parse_error("Duplicate method name&signature in class file %s",
1931 1929 CHECK_(nullHandle));
1932 1930 }
1933 1931 }
1934 1932
1935 1933 *methods_annotations_oop = methods_annotations();
1936 1934 *methods_parameter_annotations_oop = methods_parameter_annotations();
1937 1935 *methods_default_annotations_oop = methods_default_annotations();
1938 1936
1939 1937 return methods;
1940 1938 }
1941 1939 }
1942 1940
1943 1941
1944 1942 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
1945 1943 objArrayHandle methods_annotations,
1946 1944 objArrayHandle methods_parameter_annotations,
1947 1945 objArrayHandle methods_default_annotations,
1948 1946 TRAPS) {
1949 1947 typeArrayHandle nullHandle;
1950 1948 int length = methods()->length();
1951 1949 // If JVMTI original method ordering is enabled we have to
1952 1950 // remember the original class file ordering.
1953 1951 // We temporarily use the vtable_index field in the methodOop to store the
1954 1952 // class file index, so we can read in after calling qsort.
1955 1953 if (JvmtiExport::can_maintain_original_method_order()) {
1956 1954 for (int index = 0; index < length; index++) {
1957 1955 methodOop m = methodOop(methods->obj_at(index));
1958 1956 assert(!m->valid_vtable_index(), "vtable index should not be set");
1959 1957 m->set_vtable_index(index);
1960 1958 }
1961 1959 }
1962 1960 // Sort method array by ascending method name (for faster lookups & vtable construction)
1963 1961 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare
1964 1962 methodOopDesc::sort_methods(methods(),
1965 1963 methods_annotations(),
1966 1964 methods_parameter_annotations(),
1967 1965 methods_default_annotations());
1968 1966
1969 1967 // If JVMTI original method ordering is enabled construct int array remembering the original ordering
1970 1968 if (JvmtiExport::can_maintain_original_method_order()) {
1971 1969 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
1972 1970 typeArrayHandle method_ordering(THREAD, new_ordering);
1973 1971 for (int index = 0; index < length; index++) {
1974 1972 methodOop m = methodOop(methods->obj_at(index));
1975 1973 int old_index = m->vtable_index();
1976 1974 assert(old_index >= 0 && old_index < length, "invalid method index");
1977 1975 method_ordering->int_at_put(index, old_index);
1978 1976 m->set_vtable_index(methodOopDesc::invalid_vtable_index);
1979 1977 }
1980 1978 return method_ordering;
1981 1979 } else {
1982 1980 return typeArrayHandle(THREAD, Universe::the_empty_int_array());
1983 1981 }
1984 1982 }
1985 1983
1986 1984
1987 1985 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
1988 1986 ClassFileStream* cfs = stream();
1989 1987 cfs->guarantee_more(2, CHECK); // sourcefile_index
1990 1988 u2 sourcefile_index = cfs->get_u2_fast();
1991 1989 check_property(
1992 1990 valid_cp_range(sourcefile_index, cp->length()) &&
1993 1991 cp->tag_at(sourcefile_index).is_utf8(),
1994 1992 "Invalid SourceFile attribute at constant pool index %u in class file %s",
1995 1993 sourcefile_index, CHECK);
1996 1994 k->set_source_file_name(cp->symbol_at(sourcefile_index));
1997 1995 }
1998 1996
1999 1997
2000 1998
2001 1999 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2002 2000 instanceKlassHandle k,
2003 2001 int length, TRAPS) {
2004 2002 ClassFileStream* cfs = stream();
2005 2003 u1* sde_buffer = cfs->get_u1_buffer();
2006 2004 assert(sde_buffer != NULL, "null sde buffer");
2007 2005
2008 2006 // Don't bother storing it if there is no way to retrieve it
2009 2007 if (JvmtiExport::can_get_source_debug_extension()) {
2010 2008 // Optimistically assume that only 1 byte UTF format is used
2011 2009 // (common case)
2012 2010 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer,
2013 2011 length, CHECK);
2014 2012 k->set_source_debug_extension(sde_symbol);
2015 2013 }
2016 2014 // Got utf8 string, set stream position forward
2017 2015 cfs->skip_u1(length, CHECK);
2018 2016 }
2019 2017
2020 2018
2021 2019 // Inner classes can be static, private or protected (classic VM does this)
2022 2020 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2023 2021
2024 2022 // Return number of classes in the inner classes attribute table
2025 2023 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2026 2024 ClassFileStream* cfs = stream();
2027 2025 cfs->guarantee_more(2, CHECK_0); // length
2028 2026 u2 length = cfs->get_u2_fast();
2029 2027
2030 2028 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags]
2031 2029 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0);
2032 2030 typeArrayHandle inner_classes(THREAD, ic);
2033 2031 int index = 0;
2034 2032 int cp_size = cp->length();
2035 2033 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2036 2034 for (int n = 0; n < length; n++) {
2037 2035 // Inner class index
2038 2036 u2 inner_class_info_index = cfs->get_u2_fast();
2039 2037 check_property(
2040 2038 inner_class_info_index == 0 ||
2041 2039 (valid_cp_range(inner_class_info_index, cp_size) &&
2042 2040 is_klass_reference(cp, inner_class_info_index)),
2043 2041 "inner_class_info_index %u has bad constant type in class file %s",
2044 2042 inner_class_info_index, CHECK_0);
2045 2043 // Outer class index
2046 2044 u2 outer_class_info_index = cfs->get_u2_fast();
2047 2045 check_property(
2048 2046 outer_class_info_index == 0 ||
2049 2047 (valid_cp_range(outer_class_info_index, cp_size) &&
2050 2048 is_klass_reference(cp, outer_class_info_index)),
2051 2049 "outer_class_info_index %u has bad constant type in class file %s",
2052 2050 outer_class_info_index, CHECK_0);
2053 2051 // Inner class name
2054 2052 u2 inner_name_index = cfs->get_u2_fast();
2055 2053 check_property(
2056 2054 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2057 2055 cp->tag_at(inner_name_index).is_utf8()),
2058 2056 "inner_name_index %u has bad constant type in class file %s",
2059 2057 inner_name_index, CHECK_0);
2060 2058 if (_need_verify) {
2061 2059 guarantee_property(inner_class_info_index != outer_class_info_index,
2062 2060 "Class is both outer and inner class in class file %s", CHECK_0);
2063 2061 }
2064 2062 // Access flags
2065 2063 AccessFlags inner_access_flags;
2066 2064 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2067 2065 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2068 2066 // Set abstract bit for old class files for backward compatibility
2069 2067 flags |= JVM_ACC_ABSTRACT;
2070 2068 }
2071 2069 verify_legal_class_modifiers(flags, CHECK_0);
2072 2070 inner_access_flags.set_flags(flags);
2073 2071
2074 2072 inner_classes->short_at_put(index++, inner_class_info_index);
2075 2073 inner_classes->short_at_put(index++, outer_class_info_index);
2076 2074 inner_classes->short_at_put(index++, inner_name_index);
2077 2075 inner_classes->short_at_put(index++, inner_access_flags.as_short());
2078 2076 }
2079 2077
2080 2078 // 4347400: make sure there's no duplicate entry in the classes array
2081 2079 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2082 2080 for(int i = 0; i < inner_classes->length(); i += 4) {
2083 2081 for(int j = i + 4; j < inner_classes->length(); j += 4) {
2084 2082 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) ||
2085 2083 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
2086 2084 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
2087 2085 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
2088 2086 "Duplicate entry in InnerClasses in class file %s",
2089 2087 CHECK_0);
2090 2088 }
2091 2089 }
2092 2090 }
2093 2091
2094 2092 // Update instanceKlass with inner class info.
2095 2093 k->set_inner_classes(inner_classes());
2096 2094 return length;
2097 2095 }
2098 2096
2099 2097 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2100 2098 k->set_is_synthetic();
2101 2099 }
2102 2100
2103 2101 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2104 2102 ClassFileStream* cfs = stream();
2105 2103 u2 signature_index = cfs->get_u2(CHECK);
2106 2104 check_property(
2107 2105 valid_cp_range(signature_index, cp->length()) &&
2108 2106 cp->tag_at(signature_index).is_utf8(),
2109 2107 "Invalid constant pool index %u in Signature attribute in class file %s",
2110 2108 signature_index, CHECK);
2111 2109 k->set_generic_signature(cp->symbol_at(signature_index));
2112 2110 }
2113 2111
2114 2112 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2115 2113 ClassFileStream* cfs = stream();
2116 2114 // Set inner classes attribute to default sentinel
2117 2115 k->set_inner_classes(Universe::the_empty_short_array());
2118 2116 cfs->guarantee_more(2, CHECK); // attributes_count
2119 2117 u2 attributes_count = cfs->get_u2_fast();
2120 2118 bool parsed_sourcefile_attribute = false;
2121 2119 bool parsed_innerclasses_attribute = false;
2122 2120 bool parsed_enclosingmethod_attribute = false;
2123 2121 u1* runtime_visible_annotations = NULL;
2124 2122 int runtime_visible_annotations_length = 0;
2125 2123 u1* runtime_invisible_annotations = NULL;
2126 2124 int runtime_invisible_annotations_length = 0;
2127 2125 // Iterate over attributes
2128 2126 while (attributes_count--) {
2129 2127 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2130 2128 u2 attribute_name_index = cfs->get_u2_fast();
2131 2129 u4 attribute_length = cfs->get_u4_fast();
2132 2130 check_property(
2133 2131 valid_cp_range(attribute_name_index, cp->length()) &&
2134 2132 cp->tag_at(attribute_name_index).is_utf8(),
2135 2133 "Attribute name has bad constant pool index %u in class file %s",
2136 2134 attribute_name_index, CHECK);
2137 2135 symbolOop tag = cp->symbol_at(attribute_name_index);
2138 2136 if (tag == vmSymbols::tag_source_file()) {
2139 2137 // Check for SourceFile tag
2140 2138 if (_need_verify) {
2141 2139 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2142 2140 }
2143 2141 if (parsed_sourcefile_attribute) {
2144 2142 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2145 2143 } else {
2146 2144 parsed_sourcefile_attribute = true;
2147 2145 }
2148 2146 parse_classfile_sourcefile_attribute(cp, k, CHECK);
2149 2147 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2150 2148 // Check for SourceDebugExtension tag
2151 2149 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK);
2152 2150 } else if (tag == vmSymbols::tag_inner_classes()) {
2153 2151 // Check for InnerClasses tag
2154 2152 if (parsed_innerclasses_attribute) {
2155 2153 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2156 2154 } else {
2157 2155 parsed_innerclasses_attribute = true;
2158 2156 }
2159 2157 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK);
2160 2158 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2161 2159 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2162 2160 "Wrong InnerClasses attribute length in class file %s", CHECK);
2163 2161 }
2164 2162 } else if (tag == vmSymbols::tag_synthetic()) {
2165 2163 // Check for Synthetic tag
2166 2164 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2167 2165 if (attribute_length != 0) {
2168 2166 classfile_parse_error(
2169 2167 "Invalid Synthetic classfile attribute length %u in class file %s",
2170 2168 attribute_length, CHECK);
2171 2169 }
2172 2170 parse_classfile_synthetic_attribute(cp, k, CHECK);
2173 2171 } else if (tag == vmSymbols::tag_deprecated()) {
2174 2172 // Check for Deprecatd tag - 4276120
2175 2173 if (attribute_length != 0) {
2176 2174 classfile_parse_error(
2177 2175 "Invalid Deprecated classfile attribute length %u in class file %s",
2178 2176 attribute_length, CHECK);
2179 2177 }
2180 2178 } else if (_major_version >= JAVA_1_5_VERSION) {
2181 2179 if (tag == vmSymbols::tag_signature()) {
2182 2180 if (attribute_length != 2) {
2183 2181 classfile_parse_error(
2184 2182 "Wrong Signature attribute length %u in class file %s",
2185 2183 attribute_length, CHECK);
2186 2184 }
2187 2185 parse_classfile_signature_attribute(cp, k, CHECK);
2188 2186 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2189 2187 runtime_visible_annotations_length = attribute_length;
2190 2188 runtime_visible_annotations = cfs->get_u1_buffer();
2191 2189 assert(runtime_visible_annotations != NULL, "null visible annotations");
2192 2190 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2193 2191 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2194 2192 runtime_invisible_annotations_length = attribute_length;
2195 2193 runtime_invisible_annotations = cfs->get_u1_buffer();
2196 2194 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2197 2195 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2198 2196 } else if (tag == vmSymbols::tag_enclosing_method()) {
2199 2197 if (parsed_enclosingmethod_attribute) {
2200 2198 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2201 2199 } else {
2202 2200 parsed_enclosingmethod_attribute = true;
2203 2201 }
2204 2202 cfs->guarantee_more(4, CHECK); // class_index, method_index
2205 2203 u2 class_index = cfs->get_u2_fast();
2206 2204 u2 method_index = cfs->get_u2_fast();
2207 2205 if (class_index == 0) {
2208 2206 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2209 2207 }
2210 2208 // Validate the constant pool indices and types
2211 2209 if (!cp->is_within_bounds(class_index) ||
2212 2210 !is_klass_reference(cp, class_index)) {
2213 2211 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2214 2212 }
2215 2213 if (method_index != 0 &&
2216 2214 (!cp->is_within_bounds(method_index) ||
2217 2215 !cp->tag_at(method_index).is_name_and_type())) {
2218 2216 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2219 2217 }
2220 2218 k->set_enclosing_method_indices(class_index, method_index);
2221 2219 } else {
2222 2220 // Unknown attribute
2223 2221 cfs->skip_u1(attribute_length, CHECK);
2224 2222 }
2225 2223 } else {
2226 2224 // Unknown attribute
2227 2225 cfs->skip_u1(attribute_length, CHECK);
2228 2226 }
2229 2227 }
2230 2228 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
2231 2229 runtime_visible_annotations_length,
2232 2230 runtime_invisible_annotations,
2233 2231 runtime_invisible_annotations_length,
2234 2232 CHECK);
2235 2233 k->set_class_annotations(annotations());
2236 2234 }
2237 2235
2238 2236
2239 2237 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
2240 2238 int runtime_visible_annotations_length,
2241 2239 u1* runtime_invisible_annotations,
2242 2240 int runtime_invisible_annotations_length, TRAPS) {
2243 2241 typeArrayHandle annotations;
2244 2242 if (runtime_visible_annotations != NULL ||
2245 2243 runtime_invisible_annotations != NULL) {
2246 2244 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
2247 2245 runtime_invisible_annotations_length, CHECK_(annotations));
2248 2246 annotations = typeArrayHandle(THREAD, anno);
2249 2247 if (runtime_visible_annotations != NULL) {
2250 2248 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
2251 2249 }
2252 2250 if (runtime_invisible_annotations != NULL) {
2253 2251 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
2254 2252 }
2255 2253 }
2256 2254 return annotations;
2257 2255 }
2258 2256
2259 2257
2260 2258 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
2261 2259 KlassHandle h_k (THREAD, fd->field_holder());
2262 2260 assert(h_k.not_null() && fd->is_static(), "just checking");
2263 2261 if (fd->has_initial_value()) {
2264 2262 BasicType t = fd->field_type();
2265 2263 switch (t) {
2266 2264 case T_BYTE:
2267 2265 h_k()->byte_field_put(fd->offset(), fd->int_initial_value());
2268 2266 break;
2269 2267 case T_BOOLEAN:
2270 2268 h_k()->bool_field_put(fd->offset(), fd->int_initial_value());
2271 2269 break;
2272 2270 case T_CHAR:
2273 2271 h_k()->char_field_put(fd->offset(), fd->int_initial_value());
2274 2272 break;
2275 2273 case T_SHORT:
2276 2274 h_k()->short_field_put(fd->offset(), fd->int_initial_value());
2277 2275 break;
2278 2276 case T_INT:
2279 2277 h_k()->int_field_put(fd->offset(), fd->int_initial_value());
2280 2278 break;
2281 2279 case T_FLOAT:
2282 2280 h_k()->float_field_put(fd->offset(), fd->float_initial_value());
2283 2281 break;
2284 2282 case T_DOUBLE:
2285 2283 h_k()->double_field_put(fd->offset(), fd->double_initial_value());
2286 2284 break;
2287 2285 case T_LONG:
2288 2286 h_k()->long_field_put(fd->offset(), fd->long_initial_value());
2289 2287 break;
2290 2288 case T_OBJECT:
2291 2289 {
2292 2290 #ifdef ASSERT
2293 2291 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK);
2294 2292 assert(fd->signature() == sym, "just checking");
2295 2293 #endif
2296 2294 oop string = fd->string_initial_value(CHECK);
2297 2295 h_k()->obj_field_put(fd->offset(), string);
2298 2296 }
2299 2297 break;
2300 2298 default:
2301 2299 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
2302 2300 "Illegal ConstantValue attribute in class file");
2303 2301 }
2304 2302 }
2305 2303 }
2306 2304
2307 2305
2308 2306 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
2309 2307 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) {
2310 2308 // This code is for compatibility with earlier jdk's that do not
2311 2309 // have the "discovered" field in java.lang.ref.Reference. For 1.5
2312 2310 // the check for the "discovered" field should issue a warning if
2313 2311 // the field is not found. For 1.6 this code should be issue a
2314 2312 // fatal error if the "discovered" field is not found.
2315 2313 //
2316 2314 // Increment fac.nonstatic_oop_count so that the start of the
2317 2315 // next type of non-static oops leaves room for the fake oop.
2318 2316 // Do not increment next_nonstatic_oop_offset so that the
2319 2317 // fake oop is place after the java.lang.ref.Reference oop
2320 2318 // fields.
2321 2319 //
2322 2320 // Check the fields in java.lang.ref.Reference for the "discovered"
2323 2321 // field. If it is not present, artifically create a field for it.
2324 2322 // This allows this VM to run on early JDK where the field is not
2325 2323 // present.
2326 2324
2327 2325 //
2328 2326 // Increment fac.nonstatic_oop_count so that the start of the
2329 2327 // next type of non-static oops leaves room for the fake oop.
2330 2328 // Do not increment next_nonstatic_oop_offset so that the
2331 2329 // fake oop is place after the java.lang.ref.Reference oop
2332 2330 // fields.
2333 2331 //
2334 2332 // Check the fields in java.lang.ref.Reference for the "discovered"
2335 2333 // field. If it is not present, artifically create a field for it.
2336 2334 // This allows this VM to run on early JDK where the field is not
2337 2335 // present.
2338 2336 int reference_sig_index = 0;
2339 2337 int reference_name_index = 0;
2340 2338 int reference_index = 0;
2341 2339 int extra = java_lang_ref_Reference::number_of_fake_oop_fields;
2342 2340 const int n = (*fields_ptr)()->length();
2343 2341 for (int i = 0; i < n; i += instanceKlass::next_offset ) {
2344 2342 int name_index =
2345 2343 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset);
2346 2344 int sig_index =
2347 2345 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset);
2348 2346 symbolOop f_name = cp->symbol_at(name_index);
2349 2347 symbolOop f_sig = cp->symbol_at(sig_index);
2350 2348 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) {
2351 2349 // Save the index for reference signature for later use.
2352 2350 // The fake discovered field does not entries in the
2353 2351 // constant pool so the index for its signature cannot
2354 2352 // be extracted from the constant pool. It will need
2355 2353 // later, however. It's signature is vmSymbols::reference_signature()
2356 2354 // so same an index for that signature.
2357 2355 reference_sig_index = sig_index;
2358 2356 reference_name_index = name_index;
2359 2357 reference_index = i;
2360 2358 }
2361 2359 if (f_name == vmSymbols::reference_discovered_name() &&
2362 2360 f_sig == vmSymbols::reference_signature()) {
2363 2361 // The values below are fake but will force extra
2364 2362 // non-static oop fields and a corresponding non-static
2365 2363 // oop map block to be allocated.
2366 2364 extra = 0;
2367 2365 break;
2368 2366 }
2369 2367 }
2370 2368 if (extra != 0) {
2371 2369 fac_ptr->nonstatic_oop_count += extra;
2372 2370 // Add the additional entry to "fields" so that the klass
2373 2371 // contains the "discoverd" field and the field will be initialized
2374 2372 // in instances of the object.
2375 2373 int fields_with_fix_length = (*fields_ptr)()->length() +
2376 2374 instanceKlass::next_offset;
2377 2375 typeArrayOop ff = oopFactory::new_permanent_shortArray(
2378 2376 fields_with_fix_length, CHECK);
2379 2377 typeArrayHandle fields_with_fix(THREAD, ff);
2380 2378
2381 2379 // Take everything from the original but the length.
2382 2380 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) {
2383 2381 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx));
2384 2382 }
2385 2383
2386 2384 // Add the fake field at the end.
2387 2385 int i = (*fields_ptr)->length();
2388 2386 // There is no name index for the fake "discovered" field nor
2389 2387 // signature but a signature is needed so that the field will
2390 2388 // be properly initialized. Use one found for
2391 2389 // one of the other reference fields. Be sure the index for the
2392 2390 // name is 0. In fieldDescriptor::initialize() the index of the
2393 2391 // name is checked. That check is by passed for the last nonstatic
2394 2392 // oop field in a java.lang.ref.Reference which is assumed to be
2395 2393 // this artificial "discovered" field. An assertion checks that
2396 2394 // the name index is 0.
2397 2395 assert(reference_index != 0, "Missing signature for reference");
2398 2396
2399 2397 int j;
2400 2398 for (j = 0; j < instanceKlass::next_offset; j++) {
2401 2399 fields_with_fix->ushort_at_put(i + j,
2402 2400 (*fields_ptr)->ushort_at(reference_index +j));
2403 2401 }
2404 2402 // Clear the public access flag and set the private access flag.
2405 2403 short flags;
2406 2404 flags =
2407 2405 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset);
2408 2406 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set");
2409 2407 flags = flags & (~JVM_ACC_PUBLIC);
2410 2408 flags = flags | JVM_ACC_PRIVATE;
2411 2409 AccessFlags access_flags;
2412 2410 access_flags.set_flags(flags);
2413 2411 assert(!access_flags.is_public(), "Failed to clear public flag");
2414 2412 assert(access_flags.is_private(), "Failed to set private flag");
2415 2413 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset,
2416 2414 flags);
2417 2415
2418 2416 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset)
2419 2417 == reference_name_index, "The fake reference name is incorrect");
2420 2418 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset)
2421 2419 == reference_sig_index, "The fake reference signature is incorrect");
2422 2420 // The type of the field is stored in the low_offset entry during
2423 2421 // parsing.
2424 2422 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) ==
2425 2423 NONSTATIC_OOP, "The fake reference type is incorrect");
2426 2424
2427 2425 // "fields" is allocated in the permanent generation. Disgard
2428 2426 // it and let it be collected.
2429 2427 (*fields_ptr) = fields_with_fix;
2430 2428 }
2431 2429 return;
2432 2430 }
2433 2431
2434 2432
2435 2433 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr,
2436 2434 FieldAllocationCount *fac_ptr, TRAPS) {
2437 2435 // Add fake fields for java.lang.Class instances
2438 2436 //
2439 2437 // This is not particularly nice. We should consider adding a
2440 2438 // private transient object field at the Java level to
2441 2439 // java.lang.Class. Alternatively we could add a subclass of
2442 2440 // instanceKlass which provides an accessor and size computer for
2443 2441 // this field, but that appears to be more code than this hack.
2444 2442 //
2445 2443 // NOTE that we wedge these in at the beginning rather than the
2446 2444 // end of the object because the Class layout changed between JDK
2447 2445 // 1.3 and JDK 1.4 with the new reflection implementation; some
2448 2446 // nonstatic oop fields were added at the Java level. The offsets
2449 2447 // of these fake fields can't change between these two JDK
2450 2448 // versions because when the offsets are computed at bootstrap
2451 2449 // time we don't know yet which version of the JDK we're running in.
2452 2450
2453 2451 // The values below are fake but will force two non-static oop fields and
2454 2452 // a corresponding non-static oop map block to be allocated.
2455 2453 const int extra = java_lang_Class::number_of_fake_oop_fields;
2456 2454 fac_ptr->nonstatic_oop_count += extra;
2457 2455 }
2458 2456
2459 2457
2460 2458 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) {
2461 2459 // Cause the extra fake fields in java.lang.Class to show up before
2462 2460 // the Java fields for layout compatibility between 1.3 and 1.4
2463 2461 // Incrementing next_nonstatic_oop_offset here advances the
2464 2462 // location where the real java fields are placed.
2465 2463 const int extra = java_lang_Class::number_of_fake_oop_fields;
2466 2464 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize);
2467 2465 }
2468 2466
2469 2467
2470 2468 // Force MethodHandle.vmentry to be an unmanaged pointer.
2471 2469 // There is no way for a classfile to express this, so we must help it.
2472 2470 void ClassFileParser::java_dyn_MethodHandle_fix_pre(constantPoolHandle cp,
2473 2471 typeArrayHandle* fields_ptr,
2474 2472 FieldAllocationCount *fac_ptr,
2475 2473 TRAPS) {
2476 2474 // Add fake fields for java.dyn.MethodHandle instances
2477 2475 //
2478 2476 // This is not particularly nice, but since there is no way to express
2479 2477 // a native wordSize field in Java, we must do it at this level.
2480 2478
2481 2479 if (!EnableMethodHandles) return;
2482 2480
2483 2481 int word_sig_index = 0;
2484 2482 const int cp_size = cp->length();
2485 2483 for (int index = 1; index < cp_size; index++) {
2486 2484 if (cp->tag_at(index).is_utf8() &&
2487 2485 cp->symbol_at(index) == vmSymbols::machine_word_signature()) {
2488 2486 word_sig_index = index;
2489 2487 break;
2490 2488 }
2491 2489 }
2492 2490
2493 2491 if (word_sig_index == 0)
2494 2492 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(),
2495 2493 "missing I or J signature (for vmentry) in java.dyn.MethodHandle");
2496 2494
2497 2495 bool found_vmentry = false;
2498 2496
2499 2497 const int n = (*fields_ptr)()->length();
2500 2498 for (int i = 0; i < n; i += instanceKlass::next_offset) {
2501 2499 int name_index = (*fields_ptr)->ushort_at(i + instanceKlass::name_index_offset);
2502 2500 int sig_index = (*fields_ptr)->ushort_at(i + instanceKlass::signature_index_offset);
2503 2501 int acc_flags = (*fields_ptr)->ushort_at(i + instanceKlass::access_flags_offset);
2504 2502 symbolOop f_name = cp->symbol_at(name_index);
2505 2503 symbolOop f_sig = cp->symbol_at(sig_index);
2506 2504 if (f_sig == vmSymbols::byte_signature() &&
2507 2505 f_name == vmSymbols::vmentry_name() &&
2508 2506 (acc_flags & JVM_ACC_STATIC) == 0) {
2509 2507 // Adjust the field type from byte to an unmanaged pointer.
2510 2508 assert(fac_ptr->nonstatic_byte_count > 0, "");
2511 2509 fac_ptr->nonstatic_byte_count -= 1;
2512 2510 (*fields_ptr)->ushort_at_put(i + instanceKlass::signature_index_offset,
2513 2511 word_sig_index);
2514 2512 fac_ptr->nonstatic_word_count += 1;
2515 2513
2516 2514 FieldAllocationType atype = (FieldAllocationType) (*fields_ptr)->ushort_at(i + instanceKlass::low_offset);
2517 2515 assert(atype == NONSTATIC_BYTE, "");
2518 2516 FieldAllocationType new_atype = NONSTATIC_WORD;
2519 2517 (*fields_ptr)->ushort_at_put(i + instanceKlass::low_offset, new_atype);
2520 2518
2521 2519 found_vmentry = true;
2522 2520 break;
2523 2521 }
2524 2522 }
2525 2523
2526 2524 if (!found_vmentry)
2527 2525 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(),
2528 2526 "missing vmentry byte field in java.dyn.MethodHandle");
2529 2527
2530 2528 }
2531 2529
2532 2530
2533 2531 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name,
2534 2532 Handle class_loader,
2535 2533 Handle protection_domain,
2536 2534 KlassHandle host_klass,
2537 2535 GrowableArray<Handle>* cp_patches,
2538 2536 symbolHandle& parsed_name,
2539 2537 bool verify,
2540 2538 TRAPS) {
2541 2539 // So that JVMTI can cache class file in the state before retransformable agents
2542 2540 // have modified it
2543 2541 unsigned char *cached_class_file_bytes = NULL;
2544 2542 jint cached_class_file_length;
2545 2543
2546 2544 ClassFileStream* cfs = stream();
2547 2545 // Timing
2548 2546 assert(THREAD->is_Java_thread(), "must be a JavaThread");
2549 2547 JavaThread* jt = (JavaThread*) THREAD;
2550 2548
2551 2549 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2552 2550 ClassLoader::perf_class_parse_selftime(),
2553 2551 NULL,
2554 2552 jt->get_thread_stat()->perf_recursion_counts_addr(),
2555 2553 jt->get_thread_stat()->perf_timers_addr(),
2556 2554 PerfClassTraceTime::PARSE_CLASS);
2557 2555
2558 2556 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
2559 2557
2560 2558 if (JvmtiExport::should_post_class_file_load_hook()) {
2561 2559 unsigned char* ptr = cfs->buffer();
2562 2560 unsigned char* end_ptr = cfs->buffer() + cfs->length();
2563 2561
2564 2562 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
2565 2563 &ptr, &end_ptr,
2566 2564 &cached_class_file_bytes,
2567 2565 &cached_class_file_length);
2568 2566
2569 2567 if (ptr != cfs->buffer()) {
2570 2568 // JVMTI agent has modified class file data.
2571 2569 // Set new class file stream using JVMTI agent modified
2572 2570 // class file data.
2573 2571 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
2574 2572 set_stream(cfs);
2575 2573 }
2576 2574 }
2577 2575
2578 2576 _host_klass = host_klass;
2579 2577 _cp_patches = cp_patches;
2580 2578
2581 2579 instanceKlassHandle nullHandle;
2582 2580
2583 2581 // Figure out whether we can skip format checking (matching classic VM behavior)
2584 2582 _need_verify = Verifier::should_verify_for(class_loader(), verify);
2585 2583
2586 2584 // Set the verify flag in stream
2587 2585 cfs->set_verify(_need_verify);
2588 2586
2589 2587 // Save the class file name for easier error message printing.
2590 2588 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name();
2591 2589
2592 2590 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
2593 2591 // Magic value
2594 2592 u4 magic = cfs->get_u4_fast();
2595 2593 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
2596 2594 "Incompatible magic value %u in class file %s",
2597 2595 magic, CHECK_(nullHandle));
2598 2596
2599 2597 // Version numbers
2600 2598 u2 minor_version = cfs->get_u2_fast();
2601 2599 u2 major_version = cfs->get_u2_fast();
2602 2600
2603 2601 // Check version numbers - we check this even with verifier off
2604 2602 if (!is_supported_version(major_version, minor_version)) {
2605 2603 if (name.is_null()) {
2606 2604 Exceptions::fthrow(
2607 2605 THREAD_AND_LOCATION,
2608 2606 vmSymbolHandles::java_lang_UnsupportedClassVersionError(),
2609 2607 "Unsupported major.minor version %u.%u",
2610 2608 major_version,
2611 2609 minor_version);
2612 2610 } else {
2613 2611 ResourceMark rm(THREAD);
2614 2612 Exceptions::fthrow(
2615 2613 THREAD_AND_LOCATION,
2616 2614 vmSymbolHandles::java_lang_UnsupportedClassVersionError(),
2617 2615 "%s : Unsupported major.minor version %u.%u",
2618 2616 name->as_C_string(),
2619 2617 major_version,
2620 2618 minor_version);
2621 2619 }
2622 2620 return nullHandle;
2623 2621 }
2624 2622
2625 2623 _major_version = major_version;
2626 2624 _minor_version = minor_version;
2627 2625
2628 2626
2629 2627 // Check if verification needs to be relaxed for this class file
2630 2628 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
2631 2629 _relax_verify = Verifier::relax_verify_for(class_loader());
2632 2630
2633 2631 // Constant pool
2634 2632 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
2635 2633 int cp_size = cp->length();
2636 2634
2637 2635 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
2638 2636
2639 2637 // Access flags
2640 2638 AccessFlags access_flags;
2641 2639 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
2642 2640
2643 2641 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2644 2642 // Set abstract bit for old class files for backward compatibility
2645 2643 flags |= JVM_ACC_ABSTRACT;
2646 2644 }
2647 2645 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
2648 2646 access_flags.set_flags(flags);
2649 2647
2650 2648 // This class and superclass
2651 2649 instanceKlassHandle super_klass;
2652 2650 u2 this_class_index = cfs->get_u2_fast();
2653 2651 check_property(
2654 2652 valid_cp_range(this_class_index, cp_size) &&
2655 2653 cp->tag_at(this_class_index).is_unresolved_klass(),
2656 2654 "Invalid this class index %u in constant pool in class file %s",
2657 2655 this_class_index, CHECK_(nullHandle));
2658 2656
2659 2657 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index));
2660 2658 assert(class_name.not_null(), "class_name can't be null");
2661 2659
2662 2660 // It's important to set parsed_name *before* resolving the super class.
2663 2661 // (it's used for cleanup by the caller if parsing fails)
2664 2662 parsed_name = class_name;
2665 2663
2666 2664 // Update _class_name which could be null previously to be class_name
2667 2665 _class_name = class_name;
2668 2666
2669 2667 // Don't need to check whether this class name is legal or not.
2670 2668 // It has been checked when constant pool is parsed.
2671 2669 // However, make sure it is not an array type.
2672 2670 if (_need_verify) {
2673 2671 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
2674 2672 "Bad class name in class file %s",
2675 2673 CHECK_(nullHandle));
2676 2674 }
2677 2675
2678 2676 klassOop preserve_this_klass; // for storing result across HandleMark
2679 2677
2680 2678 // release all handles when parsing is done
2681 2679 { HandleMark hm(THREAD);
2682 2680
2683 2681 // Checks if name in class file matches requested name
2684 2682 if (name.not_null() && class_name() != name()) {
2685 2683 ResourceMark rm(THREAD);
2686 2684 Exceptions::fthrow(
2687 2685 THREAD_AND_LOCATION,
2688 2686 vmSymbolHandles::java_lang_NoClassDefFoundError(),
2689 2687 "%s (wrong name: %s)",
2690 2688 name->as_C_string(),
2691 2689 class_name->as_C_string()
2692 2690 );
2693 2691 return nullHandle;
2694 2692 }
2695 2693
2696 2694 if (TraceClassLoadingPreorder) {
2697 2695 tty->print("[Loading %s", name()->as_klass_external_name());
2698 2696 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
2699 2697 tty->print_cr("]");
2700 2698 }
2701 2699
2702 2700 u2 super_class_index = cfs->get_u2_fast();
2703 2701 if (super_class_index == 0) {
2704 2702 check_property(class_name() == vmSymbols::java_lang_Object(),
2705 2703 "Invalid superclass index %u in class file %s",
2706 2704 super_class_index,
2707 2705 CHECK_(nullHandle));
2708 2706 } else {
2709 2707 check_property(valid_cp_range(super_class_index, cp_size) &&
2710 2708 is_klass_reference(cp, super_class_index),
2711 2709 "Invalid superclass index %u in class file %s",
2712 2710 super_class_index,
2713 2711 CHECK_(nullHandle));
2714 2712 // The class name should be legal because it is checked when parsing constant pool.
2715 2713 // However, make sure it is not an array type.
2716 2714 bool is_array = false;
2717 2715 if (cp->tag_at(super_class_index).is_klass()) {
2718 2716 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
2719 2717 if (_need_verify)
2720 2718 is_array = super_klass->oop_is_array();
2721 2719 } else if (_need_verify) {
2722 2720 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
2723 2721 }
2724 2722 if (_need_verify) {
2725 2723 guarantee_property(!is_array,
2726 2724 "Bad superclass name in class file %s", CHECK_(nullHandle));
2727 2725 }
2728 2726 }
2729 2727
2730 2728 // Interfaces
2731 2729 u2 itfs_len = cfs->get_u2_fast();
2732 2730 objArrayHandle local_interfaces;
2733 2731 if (itfs_len == 0) {
2734 2732 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2735 2733 } else {
2736 2734 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle));
2737 2735 }
2738 2736
2739 2737 // Fields (offsets are filled in later)
2740 2738 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0};
2741 2739 objArrayHandle fields_annotations;
2742 2740 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle));
2743 2741 // Methods
2744 2742 bool has_final_method = false;
2745 2743 AccessFlags promoted_flags;
2746 2744 promoted_flags.set_flags(0);
2747 2745 // These need to be oop pointers because they are allocated lazily
2748 2746 // inside parse_methods inside a nested HandleMark
2749 2747 objArrayOop methods_annotations_oop = NULL;
2750 2748 objArrayOop methods_parameter_annotations_oop = NULL;
2751 2749 objArrayOop methods_default_annotations_oop = NULL;
2752 2750 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
2753 2751 &promoted_flags,
2754 2752 &has_final_method,
2755 2753 &methods_annotations_oop,
2756 2754 &methods_parameter_annotations_oop,
2757 2755 &methods_default_annotations_oop,
2758 2756 CHECK_(nullHandle));
2759 2757
2760 2758 objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
2761 2759 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
2762 2760 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
2763 2761
2764 2762 // We check super class after class file is parsed and format is checked
2765 2763 if (super_class_index > 0 && super_klass.is_null()) {
2766 2764 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index));
2767 2765 if (access_flags.is_interface()) {
2768 2766 // Before attempting to resolve the superclass, check for class format
2769 2767 // errors not checked yet.
2770 2768 guarantee_property(sk() == vmSymbols::java_lang_Object(),
2771 2769 "Interfaces must have java.lang.Object as superclass in class file %s",
2772 2770 CHECK_(nullHandle));
2773 2771 }
2774 2772 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
2775 2773 sk,
2776 2774 class_loader,
2777 2775 protection_domain,
2778 2776 true,
2779 2777 CHECK_(nullHandle));
2780 2778
2781 2779 KlassHandle kh (THREAD, k);
2782 2780 super_klass = instanceKlassHandle(THREAD, kh());
2783 2781 if (LinkWellKnownClasses) // my super class is well known to me
2784 2782 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve
2785 2783 }
2786 2784 if (super_klass.not_null()) {
2787 2785 if (super_klass->is_interface()) {
2788 2786 ResourceMark rm(THREAD);
2789 2787 Exceptions::fthrow(
2790 2788 THREAD_AND_LOCATION,
2791 2789 vmSymbolHandles::java_lang_IncompatibleClassChangeError(),
2792 2790 "class %s has interface %s as super class",
2793 2791 class_name->as_klass_external_name(),
2794 2792 super_klass->external_name()
2795 2793 );
2796 2794 return nullHandle;
2797 2795 }
2798 2796 // Make sure super class is not final
2799 2797 if (super_klass->is_final()) {
2800 2798 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
2801 2799 }
2802 2800 }
2803 2801
2804 2802 // Compute the transitive list of all unique interfaces implemented by this class
2805 2803 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
2806 2804
2807 2805 // sort methods
2808 2806 typeArrayHandle method_ordering = sort_methods(methods,
2809 2807 methods_annotations,
2810 2808 methods_parameter_annotations,
2811 2809 methods_default_annotations,
2812 2810 CHECK_(nullHandle));
2813 2811
2814 2812 // promote flags from parse_methods() to the klass' flags
2815 2813 access_flags.add_promoted_flags(promoted_flags.as_int());
2816 2814
2817 2815 // Size of Java vtable (in words)
2818 2816 int vtable_size = 0;
2819 2817 int itable_size = 0;
2820 2818 int num_miranda_methods = 0;
2821 2819
2822 2820 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
2823 2821 num_miranda_methods,
2824 2822 super_klass(),
2825 2823 methods(),
2826 2824 access_flags,
2827 2825 class_loader,
2828 2826 class_name,
2829 2827 local_interfaces(),
2830 2828 CHECK_(nullHandle));
2831 2829
2832 2830 // Size of Java itable (in words)
2833 2831 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
2834 2832
2835 2833 // Field size and offset computation
2836 2834 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
2837 2835 #ifndef PRODUCT
2838 2836 int orig_nonstatic_field_size = 0;
2839 2837 #endif
2840 2838 int static_field_size = 0;
2841 2839 int next_static_oop_offset;
2842 2840 int next_static_double_offset;
2843 2841 int next_static_word_offset;
2844 2842 int next_static_short_offset;
2845 2843 int next_static_byte_offset;
2846 2844 int next_static_type_offset;
2847 2845 int next_nonstatic_oop_offset;
2848 2846 int next_nonstatic_double_offset;
2849 2847 int next_nonstatic_word_offset;
2850 2848 int next_nonstatic_short_offset;
2851 2849 int next_nonstatic_byte_offset;
2852 2850 int next_nonstatic_type_offset;
2853 2851 int first_nonstatic_oop_offset;
2854 2852 int first_nonstatic_field_offset;
2855 2853 int next_nonstatic_field_offset;
2856 2854
2857 2855 // Calculate the starting byte offsets
2858 2856 next_static_oop_offset = (instanceKlass::header_size() +
2859 2857 align_object_offset(vtable_size) +
2860 2858 align_object_offset(itable_size)) * wordSize;
2861 2859 next_static_double_offset = next_static_oop_offset +
2862 2860 (fac.static_oop_count * heapOopSize);
2863 2861 if ( fac.static_double_count &&
2864 2862 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
2865 2863 Universe::field_type_should_be_aligned(T_LONG)) ) {
2866 2864 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
2867 2865 }
2868 2866
2869 2867 next_static_word_offset = next_static_double_offset +
2870 2868 (fac.static_double_count * BytesPerLong);
2871 2869 next_static_short_offset = next_static_word_offset +
2872 2870 (fac.static_word_count * BytesPerInt);
2873 2871 next_static_byte_offset = next_static_short_offset +
2874 2872 (fac.static_short_count * BytesPerShort);
2875 2873 next_static_type_offset = align_size_up((next_static_byte_offset +
2876 2874 fac.static_byte_count ), wordSize );
2877 2875 static_field_size = (next_static_type_offset -
2878 2876 next_static_oop_offset) / wordSize;
2879 2877 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
2880 2878 nonstatic_field_size * heapOopSize;
2881 2879 next_nonstatic_field_offset = first_nonstatic_field_offset;
2882 2880
2883 2881 // Add fake fields for java.lang.Class instances (also see below)
2884 2882 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) {
2885 2883 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle));
2886 2884 }
2887 2885
2888 2886 // adjust the vmentry field declaration in java.dyn.MethodHandle
2889 2887 if (EnableMethodHandles && class_name() == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) {
2890 2888 java_dyn_MethodHandle_fix_pre(cp, &fields, &fac, CHECK_(nullHandle));
2891 2889 }
2892 2890
2893 2891 // Add a fake "discovered" field if it is not present
2894 2892 // for compatibility with earlier jdk's.
2895 2893 if (class_name() == vmSymbols::java_lang_ref_Reference()
2896 2894 && class_loader.is_null()) {
2897 2895 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle));
2898 2896 }
2899 2897 // end of "discovered" field compactibility fix
2900 2898
2901 2899 unsigned int nonstatic_double_count = fac.nonstatic_double_count;
2902 2900 unsigned int nonstatic_word_count = fac.nonstatic_word_count;
2903 2901 unsigned int nonstatic_short_count = fac.nonstatic_short_count;
2904 2902 unsigned int nonstatic_byte_count = fac.nonstatic_byte_count;
2905 2903 unsigned int nonstatic_oop_count = fac.nonstatic_oop_count;
2906 2904
2907 2905 bool super_has_nonstatic_fields =
2908 2906 (super_klass() != NULL && super_klass->has_nonstatic_fields());
2909 2907 bool has_nonstatic_fields = super_has_nonstatic_fields ||
2910 2908 ((nonstatic_double_count + nonstatic_word_count +
2911 2909 nonstatic_short_count + nonstatic_byte_count +
2912 2910 nonstatic_oop_count) != 0);
2913 2911
2914 2912
2915 2913 // Prepare list of oops for oop map generation.
2916 2914 int* nonstatic_oop_offsets;
2917 2915 unsigned int* nonstatic_oop_counts;
2918 2916 unsigned int nonstatic_oop_map_count = 0;
2919 2917
2920 2918 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
2921 2919 THREAD, int, nonstatic_oop_count + 1);
2922 2920 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
2923 2921 THREAD, unsigned int, nonstatic_oop_count + 1);
2924 2922
2925 2923 // Add fake fields for java.lang.Class instances (also see above).
2926 2924 // FieldsAllocationStyle and CompactFields values will be reset to default.
2927 2925 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) {
2928 2926 java_lang_Class_fix_post(&next_nonstatic_field_offset);
2929 2927 nonstatic_oop_offsets[0] = first_nonstatic_field_offset;
2930 2928 const uint fake_oop_count = (next_nonstatic_field_offset -
2931 2929 first_nonstatic_field_offset) / heapOopSize;
2932 2930 nonstatic_oop_counts[0] = fake_oop_count;
2933 2931 nonstatic_oop_map_count = 1;
2934 2932 nonstatic_oop_count -= fake_oop_count;
2935 2933 first_nonstatic_oop_offset = first_nonstatic_field_offset;
2936 2934 } else {
2937 2935 first_nonstatic_oop_offset = 0; // will be set for first oop field
2938 2936 }
2939 2937
2940 2938 #ifndef PRODUCT
2941 2939 if( PrintCompactFieldsSavings ) {
2942 2940 next_nonstatic_double_offset = next_nonstatic_field_offset +
2943 2941 (nonstatic_oop_count * heapOopSize);
2944 2942 if ( nonstatic_double_count > 0 ) {
2945 2943 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
2946 2944 }
2947 2945 next_nonstatic_word_offset = next_nonstatic_double_offset +
2948 2946 (nonstatic_double_count * BytesPerLong);
2949 2947 next_nonstatic_short_offset = next_nonstatic_word_offset +
2950 2948 (nonstatic_word_count * BytesPerInt);
2951 2949 next_nonstatic_byte_offset = next_nonstatic_short_offset +
2952 2950 (nonstatic_short_count * BytesPerShort);
2953 2951 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
2954 2952 nonstatic_byte_count ), heapOopSize );
2955 2953 orig_nonstatic_field_size = nonstatic_field_size +
2956 2954 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
2957 2955 }
2958 2956 #endif
2959 2957 bool compact_fields = CompactFields;
2960 2958 int allocation_style = FieldsAllocationStyle;
2961 2959 if( allocation_style < 0 || allocation_style > 1 ) { // Out of range?
2962 2960 assert(false, "0 <= FieldsAllocationStyle <= 1");
2963 2961 allocation_style = 1; // Optimistic
2964 2962 }
2965 2963
2966 2964 // The next classes have predefined hard-coded fields offsets
2967 2965 // (see in JavaClasses::compute_hard_coded_offsets()).
2968 2966 // Use default fields allocation order for them.
2969 2967 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
2970 2968 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() ||
2971 2969 class_name() == vmSymbols::java_lang_Class() ||
2972 2970 class_name() == vmSymbols::java_lang_ClassLoader() ||
2973 2971 class_name() == vmSymbols::java_lang_ref_Reference() ||
2974 2972 class_name() == vmSymbols::java_lang_ref_SoftReference() ||
2975 2973 class_name() == vmSymbols::java_lang_StackTraceElement() ||
2976 2974 class_name() == vmSymbols::java_lang_String() ||
2977 2975 class_name() == vmSymbols::java_lang_Throwable() ||
2978 2976 class_name() == vmSymbols::java_lang_Boolean() ||
2979 2977 class_name() == vmSymbols::java_lang_Character() ||
2980 2978 class_name() == vmSymbols::java_lang_Float() ||
2981 2979 class_name() == vmSymbols::java_lang_Double() ||
2982 2980 class_name() == vmSymbols::java_lang_Byte() ||
2983 2981 class_name() == vmSymbols::java_lang_Short() ||
2984 2982 class_name() == vmSymbols::java_lang_Integer() ||
2985 2983 class_name() == vmSymbols::java_lang_Long())) {
2986 2984 allocation_style = 0; // Allocate oops first
2987 2985 compact_fields = false; // Don't compact fields
2988 2986 }
2989 2987
2990 2988 if( allocation_style == 0 ) {
2991 2989 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
2992 2990 next_nonstatic_oop_offset = next_nonstatic_field_offset;
2993 2991 next_nonstatic_double_offset = next_nonstatic_oop_offset +
2994 2992 (nonstatic_oop_count * heapOopSize);
2995 2993 } else if( allocation_style == 1 ) {
2996 2994 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
2997 2995 next_nonstatic_double_offset = next_nonstatic_field_offset;
2998 2996 } else {
2999 2997 ShouldNotReachHere();
3000 2998 }
3001 2999
3002 3000 int nonstatic_oop_space_count = 0;
3003 3001 int nonstatic_word_space_count = 0;
3004 3002 int nonstatic_short_space_count = 0;
3005 3003 int nonstatic_byte_space_count = 0;
3006 3004 int nonstatic_oop_space_offset;
3007 3005 int nonstatic_word_space_offset;
3008 3006 int nonstatic_short_space_offset;
3009 3007 int nonstatic_byte_space_offset;
3010 3008
3011 3009 if( nonstatic_double_count > 0 ) {
3012 3010 int offset = next_nonstatic_double_offset;
3013 3011 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3014 3012 if( compact_fields && offset != next_nonstatic_double_offset ) {
3015 3013 // Allocate available fields into the gap before double field.
3016 3014 int length = next_nonstatic_double_offset - offset;
3017 3015 assert(length == BytesPerInt, "");
3018 3016 nonstatic_word_space_offset = offset;
3019 3017 if( nonstatic_word_count > 0 ) {
3020 3018 nonstatic_word_count -= 1;
3021 3019 nonstatic_word_space_count = 1; // Only one will fit
3022 3020 length -= BytesPerInt;
3023 3021 offset += BytesPerInt;
3024 3022 }
3025 3023 nonstatic_short_space_offset = offset;
3026 3024 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3027 3025 nonstatic_short_count -= 1;
3028 3026 nonstatic_short_space_count += 1;
3029 3027 length -= BytesPerShort;
3030 3028 offset += BytesPerShort;
3031 3029 }
3032 3030 nonstatic_byte_space_offset = offset;
3033 3031 while( length > 0 && nonstatic_byte_count > 0 ) {
3034 3032 nonstatic_byte_count -= 1;
3035 3033 nonstatic_byte_space_count += 1;
3036 3034 length -= 1;
3037 3035 }
3038 3036 // Allocate oop field in the gap if there are no other fields for that.
3039 3037 nonstatic_oop_space_offset = offset;
3040 3038 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3041 3039 allocation_style != 0 ) { // when oop fields not first
3042 3040 nonstatic_oop_count -= 1;
3043 3041 nonstatic_oop_space_count = 1; // Only one will fit
3044 3042 length -= heapOopSize;
3045 3043 offset += heapOopSize;
3046 3044 }
3047 3045 }
3048 3046 }
3049 3047
3050 3048 next_nonstatic_word_offset = next_nonstatic_double_offset +
3051 3049 (nonstatic_double_count * BytesPerLong);
3052 3050 next_nonstatic_short_offset = next_nonstatic_word_offset +
3053 3051 (nonstatic_word_count * BytesPerInt);
3054 3052 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3055 3053 (nonstatic_short_count * BytesPerShort);
3056 3054
3057 3055 int notaligned_offset;
3058 3056 if( allocation_style == 0 ) {
3059 3057 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3060 3058 } else { // allocation_style == 1
3061 3059 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3062 3060 if( nonstatic_oop_count > 0 ) {
3063 3061 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3064 3062 }
3065 3063 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3066 3064 }
3067 3065 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3068 3066 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3069 3067 - first_nonstatic_field_offset)/heapOopSize);
3070 3068
3071 3069 // Iterate over fields again and compute correct offsets.
3072 3070 // The field allocation type was temporarily stored in the offset slot.
3073 3071 // oop fields are located before non-oop fields (static and non-static).
3074 3072 int len = fields->length();
3075 3073 for (int i = 0; i < len; i += instanceKlass::next_offset) {
3076 3074 int real_offset;
3077 3075 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset);
3078 3076 switch (atype) {
3079 3077 case STATIC_OOP:
3080 3078 real_offset = next_static_oop_offset;
3081 3079 next_static_oop_offset += heapOopSize;
3082 3080 break;
3083 3081 case STATIC_BYTE:
3084 3082 real_offset = next_static_byte_offset;
3085 3083 next_static_byte_offset += 1;
3086 3084 break;
3087 3085 case STATIC_SHORT:
3088 3086 real_offset = next_static_short_offset;
3089 3087 next_static_short_offset += BytesPerShort;
3090 3088 break;
3091 3089 case STATIC_WORD:
3092 3090 real_offset = next_static_word_offset;
3093 3091 next_static_word_offset += BytesPerInt;
3094 3092 break;
3095 3093 case STATIC_ALIGNED_DOUBLE:
3096 3094 case STATIC_DOUBLE:
3097 3095 real_offset = next_static_double_offset;
3098 3096 next_static_double_offset += BytesPerLong;
3099 3097 break;
3100 3098 case NONSTATIC_OOP:
3101 3099 if( nonstatic_oop_space_count > 0 ) {
3102 3100 real_offset = nonstatic_oop_space_offset;
3103 3101 nonstatic_oop_space_offset += heapOopSize;
3104 3102 nonstatic_oop_space_count -= 1;
3105 3103 } else {
3106 3104 real_offset = next_nonstatic_oop_offset;
3107 3105 next_nonstatic_oop_offset += heapOopSize;
3108 3106 }
3109 3107 // Update oop maps
3110 3108 if( nonstatic_oop_map_count > 0 &&
3111 3109 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3112 3110 real_offset -
3113 3111 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3114 3112 heapOopSize ) {
3115 3113 // Extend current oop map
3116 3114 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3117 3115 } else {
3118 3116 // Create new oop map
3119 3117 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3120 3118 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3121 3119 nonstatic_oop_map_count += 1;
3122 3120 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3123 3121 first_nonstatic_oop_offset = real_offset;
3124 3122 }
3125 3123 }
3126 3124 break;
3127 3125 case NONSTATIC_BYTE:
3128 3126 if( nonstatic_byte_space_count > 0 ) {
3129 3127 real_offset = nonstatic_byte_space_offset;
3130 3128 nonstatic_byte_space_offset += 1;
3131 3129 nonstatic_byte_space_count -= 1;
3132 3130 } else {
3133 3131 real_offset = next_nonstatic_byte_offset;
3134 3132 next_nonstatic_byte_offset += 1;
3135 3133 }
3136 3134 break;
3137 3135 case NONSTATIC_SHORT:
3138 3136 if( nonstatic_short_space_count > 0 ) {
3139 3137 real_offset = nonstatic_short_space_offset;
3140 3138 nonstatic_short_space_offset += BytesPerShort;
3141 3139 nonstatic_short_space_count -= 1;
3142 3140 } else {
3143 3141 real_offset = next_nonstatic_short_offset;
3144 3142 next_nonstatic_short_offset += BytesPerShort;
3145 3143 }
3146 3144 break;
3147 3145 case NONSTATIC_WORD:
3148 3146 if( nonstatic_word_space_count > 0 ) {
3149 3147 real_offset = nonstatic_word_space_offset;
3150 3148 nonstatic_word_space_offset += BytesPerInt;
3151 3149 nonstatic_word_space_count -= 1;
3152 3150 } else {
3153 3151 real_offset = next_nonstatic_word_offset;
3154 3152 next_nonstatic_word_offset += BytesPerInt;
3155 3153 }
3156 3154 break;
3157 3155 case NONSTATIC_ALIGNED_DOUBLE:
3158 3156 case NONSTATIC_DOUBLE:
3159 3157 real_offset = next_nonstatic_double_offset;
3160 3158 next_nonstatic_double_offset += BytesPerLong;
3161 3159 break;
3162 3160 default:
3163 3161 ShouldNotReachHere();
3164 3162 }
3165 3163 fields->short_at_put(i + instanceKlass::low_offset, extract_low_short_from_int(real_offset));
3166 3164 fields->short_at_put(i + instanceKlass::high_offset, extract_high_short_from_int(real_offset));
3167 3165 }
3168 3166
3169 3167 // Size of instances
3170 3168 int instance_size;
3171 3169
3172 3170 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3173 3171 instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3174 3172
3175 3173 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3176 3174
3177 3175 // Number of non-static oop map blocks allocated at end of klass.
3178 3176 const unsigned int total_oop_map_count =
3179 3177 compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3180 3178 first_nonstatic_oop_offset);
3181 3179
3182 3180 // Compute reference type
3183 3181 ReferenceType rt;
3184 3182 if (super_klass() == NULL) {
3185 3183 rt = REF_NONE;
3186 3184 } else {
3187 3185 rt = super_klass->reference_type();
3188 3186 }
3189 3187
3190 3188 // We can now create the basic klassOop for this klass
3191 3189 klassOop ik = oopFactory::new_instanceKlass(vtable_size, itable_size,
3192 3190 static_field_size,
3193 3191 total_oop_map_count,
3194 3192 rt, CHECK_(nullHandle));
3195 3193 instanceKlassHandle this_klass (THREAD, ik);
3196 3194
3197 3195 assert(this_klass->static_field_size() == static_field_size, "sanity");
3198 3196 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3199 3197 "sanity");
3200 3198
3201 3199 // Fill in information already parsed
3202 3200 this_klass->set_access_flags(access_flags);
3203 3201 this_klass->set_should_verify_class(verify);
3204 3202 jint lh = Klass::instance_layout_helper(instance_size, false);
3205 3203 this_klass->set_layout_helper(lh);
3206 3204 assert(this_klass->oop_is_instance(), "layout is correct");
3207 3205 assert(this_klass->size_helper() == instance_size, "correct size_helper");
3208 3206 // Not yet: supers are done below to support the new subtype-checking fields
3209 3207 //this_klass->set_super(super_klass());
3210 3208 this_klass->set_class_loader(class_loader());
3211 3209 this_klass->set_nonstatic_field_size(nonstatic_field_size);
3212 3210 this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3213 3211 this_klass->set_static_oop_field_size(fac.static_oop_count);
3214 3212 cp->set_pool_holder(this_klass());
3215 3213 this_klass->set_constants(cp());
3216 3214 this_klass->set_local_interfaces(local_interfaces());
3217 3215 this_klass->set_fields(fields());
3218 3216 this_klass->set_methods(methods());
3219 3217 if (has_final_method) {
3220 3218 this_klass->set_has_final_method();
3221 3219 }
3222 3220 this_klass->set_method_ordering(method_ordering());
3223 3221 // The instanceKlass::_methods_jmethod_ids cache and the
3224 3222 // instanceKlass::_methods_cached_itable_indices cache are
3225 3223 // both managed on the assumption that the initial cache
3226 3224 // size is equal to the number of methods in the class. If
3227 3225 // that changes, then instanceKlass::idnum_can_increment()
3228 3226 // has to be changed accordingly.
3229 3227 this_klass->set_initial_method_idnum(methods->length());
3230 3228 this_klass->set_name(cp->klass_name_at(this_class_index));
3231 3229 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself
3232 3230 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3233 3231 this_klass->set_protection_domain(protection_domain());
3234 3232 this_klass->set_fields_annotations(fields_annotations());
3235 3233 this_klass->set_methods_annotations(methods_annotations());
3236 3234 this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
3237 3235 this_klass->set_methods_default_annotations(methods_default_annotations());
3238 3236
3239 3237 this_klass->set_minor_version(minor_version);
3240 3238 this_klass->set_major_version(major_version);
3241 3239
3242 3240 // Set up methodOop::intrinsic_id as soon as we know the names of methods.
3243 3241 // (We used to do this lazily, but now we query it in Rewriter,
3244 3242 // which is eagerly done for every method, so we might as well do it now,
3245 3243 // when everything is fresh in memory.)
3246 3244 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) {
3247 3245 for (int j = 0; j < methods->length(); j++) {
3248 3246 ((methodOop)methods->obj_at(j))->init_intrinsic_id();
3249 3247 }
3250 3248 }
3251 3249
3252 3250 if (cached_class_file_bytes != NULL) {
3253 3251 // JVMTI: we have an instanceKlass now, tell it about the cached bytes
3254 3252 this_klass->set_cached_class_file(cached_class_file_bytes,
3255 3253 cached_class_file_length);
3256 3254 }
3257 3255
3258 3256 // Miranda methods
3259 3257 if ((num_miranda_methods > 0) ||
3260 3258 // if this class introduced new miranda methods or
3261 3259 (super_klass.not_null() && (super_klass->has_miranda_methods()))
3262 3260 // super class exists and this class inherited miranda methods
3263 3261 ) {
3264 3262 this_klass->set_has_miranda_methods(); // then set a flag
3265 3263 }
3266 3264
3267 3265 // Additional attributes
3268 3266 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle));
3269 3267
3270 3268 // Make sure this is the end of class file stream
3271 3269 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3272 3270
3273 3271 // Initialize static fields
3274 3272 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle));
3275 3273
3276 3274 // VerifyOops believes that once this has been set, the object is completely loaded.
3277 3275 // Compute transitive closure of interfaces this class implements
3278 3276 this_klass->set_transitive_interfaces(transitive_interfaces());
3279 3277
3280 3278 // Fill in information needed to compute superclasses.
3281 3279 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3282 3280
3283 3281 // Initialize itable offset tables
3284 3282 klassItable::setup_itable_offset_table(this_klass);
3285 3283
3286 3284 // Do final class setup
3287 3285 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3288 3286
3289 3287 set_precomputed_flags(this_klass);
3290 3288
3291 3289 // reinitialize modifiers, using the InnerClasses attribute
3292 3290 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3293 3291 this_klass->set_modifier_flags(computed_modifiers);
3294 3292
3295 3293 // check if this class can access its super class
3296 3294 check_super_class_access(this_klass, CHECK_(nullHandle));
3297 3295
3298 3296 // check if this class can access its superinterfaces
3299 3297 check_super_interface_access(this_klass, CHECK_(nullHandle));
3300 3298
3301 3299 // check if this class overrides any final method
3302 3300 check_final_method_override(this_klass, CHECK_(nullHandle));
3303 3301
3304 3302 // check that if this class is an interface then it doesn't have static methods
3305 3303 if (this_klass->is_interface()) {
3306 3304 check_illegal_static_method(this_klass, CHECK_(nullHandle));
3307 3305 }
3308 3306
3309 3307 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
3310 3308 false /* not shared class */);
3311 3309
3312 3310 if (TraceClassLoading) {
3313 3311 // print in a single call to reduce interleaving of output
3314 3312 if (cfs->source() != NULL) {
3315 3313 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3316 3314 cfs->source());
3317 3315 } else if (class_loader.is_null()) {
3318 3316 if (THREAD->is_Java_thread()) {
3319 3317 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3320 3318 tty->print("[Loaded %s by instance of %s]\n",
3321 3319 this_klass->external_name(),
3322 3320 instanceKlass::cast(caller)->external_name());
3323 3321 } else {
3324 3322 tty->print("[Loaded %s]\n", this_klass->external_name());
3325 3323 }
3326 3324 } else {
3327 3325 ResourceMark rm;
3328 3326 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3329 3327 instanceKlass::cast(class_loader->klass())->external_name());
3330 3328 }
3331 3329 }
3332 3330
3333 3331 if (TraceClassResolution) {
3334 3332 // print out the superclass.
3335 3333 const char * from = Klass::cast(this_klass())->external_name();
3336 3334 if (this_klass->java_super() != NULL) {
3337 3335 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name());
3338 3336 }
3339 3337 // print out each of the interface classes referred to by this class.
3340 3338 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
3341 3339 if (!local_interfaces.is_null()) {
3342 3340 int length = local_interfaces->length();
3343 3341 for (int i = 0; i < length; i++) {
3344 3342 klassOop k = klassOop(local_interfaces->obj_at(i));
3345 3343 instanceKlass* to_class = instanceKlass::cast(k);
3346 3344 const char * to = to_class->external_name();
3347 3345 tty->print("RESOLVE %s %s (interface)\n", from, to);
3348 3346 }
3349 3347 }
3350 3348 }
3351 3349
3352 3350 #ifndef PRODUCT
3353 3351 if( PrintCompactFieldsSavings ) {
3354 3352 if( nonstatic_field_size < orig_nonstatic_field_size ) {
3355 3353 tty->print("[Saved %d of %d bytes in %s]\n",
3356 3354 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3357 3355 orig_nonstatic_field_size*heapOopSize,
3358 3356 this_klass->external_name());
3359 3357 } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3360 3358 tty->print("[Wasted %d over %d bytes in %s]\n",
3361 3359 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3362 3360 orig_nonstatic_field_size*heapOopSize,
3363 3361 this_klass->external_name());
3364 3362 }
3365 3363 }
3366 3364 #endif
3367 3365
3368 3366 // preserve result across HandleMark
3369 3367 preserve_this_klass = this_klass();
3370 3368 }
3371 3369
3372 3370 // Create new handle outside HandleMark
3373 3371 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3374 3372 debug_only(this_klass->as_klassOop()->verify();)
3375 3373
3376 3374 return this_klass;
3377 3375 }
3378 3376
3379 3377
3380 3378 unsigned int
3381 3379 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3382 3380 unsigned int nonstatic_oop_map_count,
3383 3381 int first_nonstatic_oop_offset) {
3384 3382 unsigned int map_count =
3385 3383 super.is_null() ? 0 : super->nonstatic_oop_map_count();
3386 3384 if (nonstatic_oop_map_count > 0) {
3387 3385 // We have oops to add to map
3388 3386 if (map_count == 0) {
3389 3387 map_count = nonstatic_oop_map_count;
3390 3388 } else {
3391 3389 // Check whether we should add a new map block or whether the last one can
3392 3390 // be extended
3393 3391 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3394 3392 OopMapBlock* const last_map = first_map + map_count - 1;
3395 3393
3396 3394 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3397 3395 if (next_offset == first_nonstatic_oop_offset) {
3398 3396 // There is no gap bettwen superklass's last oop field and first
3399 3397 // local oop field, merge maps.
3400 3398 nonstatic_oop_map_count -= 1;
3401 3399 } else {
3402 3400 // Superklass didn't end with a oop field, add extra maps
3403 3401 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3404 3402 }
3405 3403 map_count += nonstatic_oop_map_count;
3406 3404 }
3407 3405 }
3408 3406 return map_count;
3409 3407 }
3410 3408
3411 3409
3412 3410 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3413 3411 unsigned int nonstatic_oop_map_count,
3414 3412 int* nonstatic_oop_offsets,
3415 3413 unsigned int* nonstatic_oop_counts) {
3416 3414 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3417 3415 const instanceKlass* const super = k->superklass();
3418 3416 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3419 3417 if (super_count > 0) {
3420 3418 // Copy maps from superklass
3421 3419 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3422 3420 for (unsigned int i = 0; i < super_count; ++i) {
3423 3421 *this_oop_map++ = *super_oop_map++;
3424 3422 }
3425 3423 }
3426 3424
3427 3425 if (nonstatic_oop_map_count > 0) {
3428 3426 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3429 3427 // The counts differ because there is no gap between superklass's last oop
3430 3428 // field and the first local oop field. Extend the last oop map copied
3431 3429 // from the superklass instead of creating new one.
3432 3430 nonstatic_oop_map_count--;
3433 3431 nonstatic_oop_offsets++;
3434 3432 this_oop_map--;
3435 3433 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3436 3434 this_oop_map++;
3437 3435 }
3438 3436
3439 3437 // Add new map blocks, fill them
3440 3438 while (nonstatic_oop_map_count-- > 0) {
3441 3439 this_oop_map->set_offset(*nonstatic_oop_offsets++);
3442 3440 this_oop_map->set_count(*nonstatic_oop_counts++);
3443 3441 this_oop_map++;
3444 3442 }
3445 3443 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3446 3444 this_oop_map, "sanity");
3447 3445 }
3448 3446 }
3449 3447
3450 3448
3451 3449 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3452 3450 klassOop super = k->super();
3453 3451
3454 3452 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3455 3453 // in which case we don't have to register objects as finalizable
3456 3454 if (!_has_empty_finalizer) {
3457 3455 if (_has_finalizer ||
3458 3456 (super != NULL && super->klass_part()->has_finalizer())) {
3459 3457 k->set_has_finalizer();
3460 3458 }
3461 3459 }
3462 3460
3463 3461 #ifdef ASSERT
3464 3462 bool f = false;
3465 3463 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(),
3466 3464 vmSymbols::void_method_signature());
3467 3465 if (m != NULL && !m->is_empty_method()) {
3468 3466 f = true;
3469 3467 }
3470 3468 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3471 3469 #endif
3472 3470
3473 3471 // Check if this klass supports the java.lang.Cloneable interface
3474 3472 if (SystemDictionary::cloneable_klass_loaded()) {
3475 3473 if (k->is_subtype_of(SystemDictionary::cloneable_klass())) {
3476 3474 k->set_is_cloneable();
3477 3475 }
3478 3476 }
3479 3477
3480 3478 // Check if this klass has a vanilla default constructor
3481 3479 if (super == NULL) {
3482 3480 // java.lang.Object has empty default constructor
3483 3481 k->set_has_vanilla_constructor();
3484 3482 } else {
3485 3483 if (Klass::cast(super)->has_vanilla_constructor() &&
3486 3484 _has_vanilla_constructor) {
3487 3485 k->set_has_vanilla_constructor();
3488 3486 }
3489 3487 #ifdef ASSERT
3490 3488 bool v = false;
3491 3489 if (Klass::cast(super)->has_vanilla_constructor()) {
3492 3490 methodOop constructor = k->find_method(vmSymbols::object_initializer_name(
3493 3491 ), vmSymbols::void_method_signature());
3494 3492 if (constructor != NULL && constructor->is_vanilla_constructor()) {
3495 3493 v = true;
3496 3494 }
3497 3495 }
3498 3496 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3499 3497 #endif
3500 3498 }
3501 3499
3502 3500 // If it cannot be fast-path allocated, set a bit in the layout helper.
3503 3501 // See documentation of instanceKlass::can_be_fastpath_allocated().
3504 3502 assert(k->size_helper() > 0, "layout_helper is initialized");
3505 3503 if ((!RegisterFinalizersAtInit && k->has_finalizer())
3506 3504 || k->is_abstract() || k->is_interface()
3507 3505 || (k->name() == vmSymbols::java_lang_Class()
3508 3506 && k->class_loader() == NULL)
3509 3507 || k->size_helper() >= FastAllocateSizeLimit) {
3510 3508 // Forbid fast-path allocation.
3511 3509 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
3512 3510 k->set_layout_helper(lh);
3513 3511 }
3514 3512 }
3515 3513
3516 3514
3517 3515 // utility method for appending and array with check for duplicates
3518 3516
3519 3517 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
3520 3518 // iterate over new interfaces
3521 3519 for (int i = 0; i < ifs->length(); i++) {
3522 3520 oop e = ifs->obj_at(i);
3523 3521 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
3524 3522 // check for duplicates
3525 3523 bool duplicate = false;
3526 3524 for (int j = 0; j < index; j++) {
3527 3525 if (result->obj_at(j) == e) {
3528 3526 duplicate = true;
3529 3527 break;
3530 3528 }
3531 3529 }
3532 3530 // add new interface
3533 3531 if (!duplicate) {
3534 3532 result->obj_at_put(index++, e);
3535 3533 }
3536 3534 }
3537 3535 }
3538 3536
3539 3537 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) {
3540 3538 // Compute maximum size for transitive interfaces
3541 3539 int max_transitive_size = 0;
3542 3540 int super_size = 0;
3543 3541 // Add superclass transitive interfaces size
3544 3542 if (super.not_null()) {
3545 3543 super_size = super->transitive_interfaces()->length();
3546 3544 max_transitive_size += super_size;
3547 3545 }
3548 3546 // Add local interfaces' super interfaces
3549 3547 int local_size = local_ifs->length();
3550 3548 for (int i = 0; i < local_size; i++) {
3551 3549 klassOop l = klassOop(local_ifs->obj_at(i));
3552 3550 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
3553 3551 }
3554 3552 // Finally add local interfaces
3555 3553 max_transitive_size += local_size;
3556 3554 // Construct array
3557 3555 objArrayHandle result;
3558 3556 if (max_transitive_size == 0) {
3559 3557 // no interfaces, use canonicalized array
3560 3558 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3561 3559 } else if (max_transitive_size == super_size) {
3562 3560 // no new local interfaces added, share superklass' transitive interface array
3563 3561 result = objArrayHandle(THREAD, super->transitive_interfaces());
3564 3562 } else if (max_transitive_size == local_size) {
3565 3563 // only local interfaces added, share local interface array
3566 3564 result = local_ifs;
3567 3565 } else {
3568 3566 objArrayHandle nullHandle;
3569 3567 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
3570 3568 result = objArrayHandle(THREAD, new_objarray);
3571 3569 int index = 0;
3572 3570 // Copy down from superclass
3573 3571 if (super.not_null()) {
3574 3572 append_interfaces(result, index, super->transitive_interfaces());
3575 3573 }
3576 3574 // Copy down from local interfaces' superinterfaces
3577 3575 for (int i = 0; i < local_ifs->length(); i++) {
3578 3576 klassOop l = klassOop(local_ifs->obj_at(i));
3579 3577 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
3580 3578 }
3581 3579 // Finally add local interfaces
3582 3580 append_interfaces(result, index, local_ifs());
3583 3581
3584 3582 // Check if duplicates were removed
3585 3583 if (index != max_transitive_size) {
3586 3584 assert(index < max_transitive_size, "just checking");
3587 3585 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
3588 3586 for (int i = 0; i < index; i++) {
3589 3587 oop e = result->obj_at(i);
3590 3588 assert(e != NULL, "just checking");
3591 3589 new_result->obj_at_put(i, e);
3592 3590 }
3593 3591 result = objArrayHandle(THREAD, new_result);
3594 3592 }
3595 3593 }
3596 3594 return result;
3597 3595 }
3598 3596
3599 3597
3600 3598 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
3601 3599 klassOop super = this_klass->super();
3602 3600 if ((super != NULL) &&
3603 3601 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
3604 3602 ResourceMark rm(THREAD);
3605 3603 Exceptions::fthrow(
3606 3604 THREAD_AND_LOCATION,
3607 3605 vmSymbolHandles::java_lang_IllegalAccessError(),
3608 3606 "class %s cannot access its superclass %s",
3609 3607 this_klass->external_name(),
3610 3608 instanceKlass::cast(super)->external_name()
3611 3609 );
3612 3610 return;
3613 3611 }
3614 3612 }
3615 3613
3616 3614
3617 3615 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
3618 3616 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
3619 3617 int lng = local_interfaces->length();
3620 3618 for (int i = lng - 1; i >= 0; i--) {
3621 3619 klassOop k = klassOop(local_interfaces->obj_at(i));
3622 3620 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
3623 3621 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
3624 3622 ResourceMark rm(THREAD);
3625 3623 Exceptions::fthrow(
3626 3624 THREAD_AND_LOCATION,
3627 3625 vmSymbolHandles::java_lang_IllegalAccessError(),
3628 3626 "class %s cannot access its superinterface %s",
3629 3627 this_klass->external_name(),
3630 3628 instanceKlass::cast(k)->external_name()
3631 3629 );
3632 3630 return;
3633 3631 }
3634 3632 }
3635 3633 }
3636 3634
3637 3635
3638 3636 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
3639 3637 objArrayHandle methods (THREAD, this_klass->methods());
3640 3638 int num_methods = methods->length();
3641 3639
3642 3640 // go thru each method and check if it overrides a final method
3643 3641 for (int index = 0; index < num_methods; index++) {
3644 3642 methodOop m = (methodOop)methods->obj_at(index);
3645 3643
3646 3644 // skip private, static and <init> methods
3647 3645 if ((!m->is_private()) &&
3648 3646 (!m->is_static()) &&
3649 3647 (m->name() != vmSymbols::object_initializer_name())) {
3650 3648
3651 3649 symbolOop name = m->name();
3652 3650 symbolOop signature = m->signature();
3653 3651 klassOop k = this_klass->super();
3654 3652 methodOop super_m = NULL;
3655 3653 while (k != NULL) {
3656 3654 // skip supers that don't have final methods.
3657 3655 if (k->klass_part()->has_final_method()) {
3658 3656 // lookup a matching method in the super class hierarchy
3659 3657 super_m = instanceKlass::cast(k)->lookup_method(name, signature);
3660 3658 if (super_m == NULL) {
3661 3659 break; // didn't find any match; get out
3662 3660 }
3663 3661
3664 3662 if (super_m->is_final() &&
3665 3663 // matching method in super is final
3666 3664 (Reflection::verify_field_access(this_klass->as_klassOop(),
3667 3665 super_m->method_holder(),
3668 3666 super_m->method_holder(),
3669 3667 super_m->access_flags(), false))
3670 3668 // this class can access super final method and therefore override
3671 3669 ) {
3672 3670 ResourceMark rm(THREAD);
3673 3671 Exceptions::fthrow(
3674 3672 THREAD_AND_LOCATION,
3675 3673 vmSymbolHandles::java_lang_VerifyError(),
3676 3674 "class %s overrides final method %s.%s",
3677 3675 this_klass->external_name(),
3678 3676 name->as_C_string(),
3679 3677 signature->as_C_string()
3680 3678 );
3681 3679 return;
3682 3680 }
3683 3681
3684 3682 // continue to look from super_m's holder's super.
3685 3683 k = instanceKlass::cast(super_m->method_holder())->super();
3686 3684 continue;
3687 3685 }
3688 3686
3689 3687 k = k->klass_part()->super();
3690 3688 }
3691 3689 }
3692 3690 }
3693 3691 }
3694 3692
3695 3693
3696 3694 // assumes that this_klass is an interface
3697 3695 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
3698 3696 assert(this_klass->is_interface(), "not an interface");
3699 3697 objArrayHandle methods (THREAD, this_klass->methods());
3700 3698 int num_methods = methods->length();
3701 3699
3702 3700 for (int index = 0; index < num_methods; index++) {
3703 3701 methodOop m = (methodOop)methods->obj_at(index);
3704 3702 // if m is static and not the init method, throw a verify error
3705 3703 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
3706 3704 ResourceMark rm(THREAD);
3707 3705 Exceptions::fthrow(
3708 3706 THREAD_AND_LOCATION,
3709 3707 vmSymbolHandles::java_lang_VerifyError(),
3710 3708 "Illegal static method %s in interface %s",
3711 3709 m->name()->as_C_string(),
3712 3710 this_klass->external_name()
3713 3711 );
3714 3712 return;
3715 3713 }
3716 3714 }
3717 3715 }
3718 3716
3719 3717 // utility methods for format checking
3720 3718
3721 3719 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
3722 3720 if (!_need_verify) { return; }
3723 3721
3724 3722 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
3725 3723 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
3726 3724 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
3727 3725 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
3728 3726 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
3729 3727 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
3730 3728 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
3731 3729
3732 3730 if ((is_abstract && is_final) ||
3733 3731 (is_interface && !is_abstract) ||
3734 3732 (is_interface && major_gte_15 && (is_super || is_enum)) ||
3735 3733 (!is_interface && major_gte_15 && is_annotation)) {
3736 3734 ResourceMark rm(THREAD);
3737 3735 Exceptions::fthrow(
3738 3736 THREAD_AND_LOCATION,
3739 3737 vmSymbolHandles::java_lang_ClassFormatError(),
3740 3738 "Illegal class modifiers in class %s: 0x%X",
3741 3739 _class_name->as_C_string(), flags
3742 3740 );
3743 3741 return;
3744 3742 }
3745 3743 }
3746 3744
3747 3745 bool ClassFileParser::has_illegal_visibility(jint flags) {
3748 3746 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
3749 3747 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
3750 3748 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
3751 3749
3752 3750 return ((is_public && is_protected) ||
3753 3751 (is_public && is_private) ||
3754 3752 (is_protected && is_private));
3755 3753 }
3756 3754
3757 3755 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
3758 3756 u2 max_version = JDK_Version::is_gte_jdk17x_version() ?
3759 3757 JAVA_MAX_SUPPORTED_VERSION : JAVA_6_VERSION;
3760 3758 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
3761 3759 (major <= max_version) &&
3762 3760 ((major != max_version) ||
3763 3761 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
3764 3762 }
3765 3763
3766 3764 void ClassFileParser::verify_legal_field_modifiers(
3767 3765 jint flags, bool is_interface, TRAPS) {
3768 3766 if (!_need_verify) { return; }
3769 3767
3770 3768 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
3771 3769 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
3772 3770 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
3773 3771 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
3774 3772 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
3775 3773 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
3776 3774 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
3777 3775 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
3778 3776 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
3779 3777
3780 3778 bool is_illegal = false;
3781 3779
3782 3780 if (is_interface) {
3783 3781 if (!is_public || !is_static || !is_final || is_private ||
3784 3782 is_protected || is_volatile || is_transient ||
3785 3783 (major_gte_15 && is_enum)) {
3786 3784 is_illegal = true;
3787 3785 }
3788 3786 } else { // not interface
3789 3787 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
3790 3788 is_illegal = true;
3791 3789 }
3792 3790 }
3793 3791
3794 3792 if (is_illegal) {
3795 3793 ResourceMark rm(THREAD);
3796 3794 Exceptions::fthrow(
3797 3795 THREAD_AND_LOCATION,
3798 3796 vmSymbolHandles::java_lang_ClassFormatError(),
3799 3797 "Illegal field modifiers in class %s: 0x%X",
3800 3798 _class_name->as_C_string(), flags);
3801 3799 return;
3802 3800 }
3803 3801 }
3804 3802
3805 3803 void ClassFileParser::verify_legal_method_modifiers(
3806 3804 jint flags, bool is_interface, symbolHandle name, TRAPS) {
3807 3805 if (!_need_verify) { return; }
3808 3806
3809 3807 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
3810 3808 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
3811 3809 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
3812 3810 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
3813 3811 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
3814 3812 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
3815 3813 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
3816 3814 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
3817 3815 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
3818 3816 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
3819 3817 const bool is_initializer = (name == vmSymbols::object_initializer_name());
3820 3818
3821 3819 bool is_illegal = false;
3822 3820
3823 3821 if (is_interface) {
3824 3822 if (!is_abstract || !is_public || is_static || is_final ||
3825 3823 is_native || (major_gte_15 && (is_synchronized || is_strict))) {
3826 3824 is_illegal = true;
3827 3825 }
3828 3826 } else { // not interface
3829 3827 if (is_initializer) {
3830 3828 if (is_static || is_final || is_synchronized || is_native ||
3831 3829 is_abstract || (major_gte_15 && is_bridge)) {
3832 3830 is_illegal = true;
3833 3831 }
3834 3832 } else { // not initializer
3835 3833 if (is_abstract) {
3836 3834 if ((is_final || is_native || is_private || is_static ||
3837 3835 (major_gte_15 && (is_synchronized || is_strict)))) {
3838 3836 is_illegal = true;
3839 3837 }
3840 3838 }
3841 3839 if (has_illegal_visibility(flags)) {
3842 3840 is_illegal = true;
3843 3841 }
3844 3842 }
3845 3843 }
3846 3844
3847 3845 if (is_illegal) {
3848 3846 ResourceMark rm(THREAD);
3849 3847 Exceptions::fthrow(
3850 3848 THREAD_AND_LOCATION,
3851 3849 vmSymbolHandles::java_lang_ClassFormatError(),
3852 3850 "Method %s in class %s has illegal modifiers: 0x%X",
3853 3851 name->as_C_string(), _class_name->as_C_string(), flags);
3854 3852 return;
3855 3853 }
3856 3854 }
3857 3855
3858 3856 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
3859 3857 assert(_need_verify, "only called when _need_verify is true");
3860 3858 int i = 0;
3861 3859 int count = length >> 2;
3862 3860 for (int k=0; k<count; k++) {
3863 3861 unsigned char b0 = buffer[i];
3864 3862 unsigned char b1 = buffer[i+1];
3865 3863 unsigned char b2 = buffer[i+2];
3866 3864 unsigned char b3 = buffer[i+3];
3867 3865 // For an unsigned char v,
3868 3866 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
3869 3867 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
3870 3868 unsigned char res = b0 | b0 - 1 |
3871 3869 b1 | b1 - 1 |
3872 3870 b2 | b2 - 1 |
3873 3871 b3 | b3 - 1;
3874 3872 if (res >= 128) break;
3875 3873 i += 4;
3876 3874 }
3877 3875 for(; i < length; i++) {
3878 3876 unsigned short c;
3879 3877 // no embedded zeros
3880 3878 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
3881 3879 if(buffer[i] < 128) {
3882 3880 continue;
3883 3881 }
3884 3882 if ((i + 5) < length) { // see if it's legal supplementary character
3885 3883 if (UTF8::is_supplementary_character(&buffer[i])) {
3886 3884 c = UTF8::get_supplementary_character(&buffer[i]);
3887 3885 i += 5;
3888 3886 continue;
3889 3887 }
3890 3888 }
3891 3889 switch (buffer[i] >> 4) {
3892 3890 default: break;
3893 3891 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
3894 3892 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
3895 3893 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
3896 3894 c = (buffer[i] & 0x1F) << 6;
3897 3895 i++;
3898 3896 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
3899 3897 c += buffer[i] & 0x3F;
3900 3898 if (_major_version <= 47 || c == 0 || c >= 0x80) {
3901 3899 // for classes with major > 47, c must a null or a character in its shortest form
3902 3900 break;
3903 3901 }
3904 3902 }
3905 3903 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
3906 3904 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
3907 3905 c = (buffer[i] & 0xF) << 12;
3908 3906 i += 2;
3909 3907 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
3910 3908 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
3911 3909 if (_major_version <= 47 || c >= 0x800) {
3912 3910 // for classes with major > 47, c must be in its shortest form
3913 3911 break;
3914 3912 }
3915 3913 }
3916 3914 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
3917 3915 } // end of switch
3918 3916 } // end of for
3919 3917 }
3920 3918
3921 3919 // Checks if name is a legal class name.
3922 3920 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) {
3923 3921 if (!_need_verify || _relax_verify) { return; }
3924 3922
3925 3923 char buf[fixed_buffer_size];
3926 3924 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
3927 3925 unsigned int length = name->utf8_length();
3928 3926 bool legal = false;
3929 3927
3930 3928 if (length > 0) {
3931 3929 char* p;
3932 3930 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
3933 3931 p = skip_over_field_signature(bytes, false, length, CHECK);
3934 3932 legal = (p != NULL) && ((p - bytes) == (int)length);
3935 3933 } else if (_major_version < JAVA_1_5_VERSION) {
3936 3934 if (bytes[0] != '<') {
3937 3935 p = skip_over_field_name(bytes, true, length);
3938 3936 legal = (p != NULL) && ((p - bytes) == (int)length);
3939 3937 }
3940 3938 } else {
3941 3939 // 4900761: relax the constraints based on JSR202 spec
3942 3940 // Class names may be drawn from the entire Unicode character set.
3943 3941 // Identifiers between '/' must be unqualified names.
3944 3942 // The utf8 string has been verified when parsing cpool entries.
3945 3943 legal = verify_unqualified_name(bytes, length, LegalClass);
3946 3944 }
3947 3945 }
3948 3946 if (!legal) {
3949 3947 ResourceMark rm(THREAD);
3950 3948 Exceptions::fthrow(
3951 3949 THREAD_AND_LOCATION,
3952 3950 vmSymbolHandles::java_lang_ClassFormatError(),
3953 3951 "Illegal class name \"%s\" in class file %s", bytes,
3954 3952 _class_name->as_C_string()
3955 3953 );
3956 3954 return;
3957 3955 }
3958 3956 }
3959 3957
3960 3958 // Checks if name is a legal field name.
3961 3959 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) {
3962 3960 if (!_need_verify || _relax_verify) { return; }
3963 3961
3964 3962 char buf[fixed_buffer_size];
3965 3963 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
3966 3964 unsigned int length = name->utf8_length();
3967 3965 bool legal = false;
3968 3966
3969 3967 if (length > 0) {
3970 3968 if (_major_version < JAVA_1_5_VERSION) {
3971 3969 if (bytes[0] != '<') {
3972 3970 char* p = skip_over_field_name(bytes, false, length);
3973 3971 legal = (p != NULL) && ((p - bytes) == (int)length);
3974 3972 }
3975 3973 } else {
3976 3974 // 4881221: relax the constraints based on JSR202 spec
3977 3975 legal = verify_unqualified_name(bytes, length, LegalField);
3978 3976 }
3979 3977 }
3980 3978
3981 3979 if (!legal) {
3982 3980 ResourceMark rm(THREAD);
3983 3981 Exceptions::fthrow(
3984 3982 THREAD_AND_LOCATION,
3985 3983 vmSymbolHandles::java_lang_ClassFormatError(),
3986 3984 "Illegal field name \"%s\" in class %s", bytes,
3987 3985 _class_name->as_C_string()
3988 3986 );
3989 3987 return;
3990 3988 }
3991 3989 }
3992 3990
3993 3991 // Checks if name is a legal method name.
3994 3992 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) {
3995 3993 if (!_need_verify || _relax_verify) { return; }
3996 3994
3997 3995 assert(!name.is_null(), "method name is null");
3998 3996 char buf[fixed_buffer_size];
3999 3997 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4000 3998 unsigned int length = name->utf8_length();
4001 3999 bool legal = false;
4002 4000
4003 4001 if (length > 0) {
4004 4002 if (bytes[0] == '<') {
4005 4003 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4006 4004 legal = true;
4007 4005 }
4008 4006 } else if (_major_version < JAVA_1_5_VERSION) {
4009 4007 char* p;
4010 4008 p = skip_over_field_name(bytes, false, length);
4011 4009 legal = (p != NULL) && ((p - bytes) == (int)length);
4012 4010 } else {
4013 4011 // 4881221: relax the constraints based on JSR202 spec
4014 4012 legal = verify_unqualified_name(bytes, length, LegalMethod);
4015 4013 }
4016 4014 }
4017 4015
4018 4016 if (!legal) {
4019 4017 ResourceMark rm(THREAD);
4020 4018 Exceptions::fthrow(
4021 4019 THREAD_AND_LOCATION,
4022 4020 vmSymbolHandles::java_lang_ClassFormatError(),
4023 4021 "Illegal method name \"%s\" in class %s", bytes,
4024 4022 _class_name->as_C_string()
4025 4023 );
4026 4024 return;
4027 4025 }
4028 4026 }
4029 4027
4030 4028
4031 4029 // Checks if signature is a legal field signature.
4032 4030 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) {
4033 4031 if (!_need_verify) { return; }
4034 4032
4035 4033 char buf[fixed_buffer_size];
4036 4034 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4037 4035 unsigned int length = signature->utf8_length();
4038 4036 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4039 4037
4040 4038 if (p == NULL || (p - bytes) != (int)length) {
4041 4039 ResourceMark rm(THREAD);
4042 4040 Exceptions::fthrow(
4043 4041 THREAD_AND_LOCATION,
4044 4042 vmSymbolHandles::java_lang_ClassFormatError(),
4045 4043 "Field \"%s\" in class %s has illegal signature \"%s\"",
4046 4044 name->as_C_string(), _class_name->as_C_string(), bytes
4047 4045 );
4048 4046 return;
4049 4047 }
4050 4048 }
4051 4049
4052 4050 // Checks if signature is a legal method signature.
4053 4051 // Returns number of parameters
4054 4052 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) {
4055 4053 if (!_need_verify) {
4056 4054 // make sure caller's args_size will be less than 0 even for non-static
4057 4055 // method so it will be recomputed in compute_size_of_parameters().
4058 4056 return -2;
4059 4057 }
4060 4058
4061 4059 unsigned int args_size = 0;
4062 4060 char buf[fixed_buffer_size];
4063 4061 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4064 4062 unsigned int length = signature->utf8_length();
4065 4063 char* nextp;
4066 4064
4067 4065 // The first character must be a '('
4068 4066 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4069 4067 length--;
4070 4068 // Skip over legal field signatures
4071 4069 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4072 4070 while ((length > 0) && (nextp != NULL)) {
4073 4071 args_size++;
4074 4072 if (p[0] == 'J' || p[0] == 'D') {
4075 4073 args_size++;
4076 4074 }
4077 4075 length -= nextp - p;
4078 4076 p = nextp;
4079 4077 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4080 4078 }
4081 4079 // The first non-signature thing better be a ')'
4082 4080 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4083 4081 length--;
4084 4082 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4085 4083 // All internal methods must return void
4086 4084 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4087 4085 return args_size;
4088 4086 }
4089 4087 } else {
4090 4088 // Now we better just have a return value
4091 4089 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4092 4090 if (nextp && ((int)length == (nextp - p))) {
4093 4091 return args_size;
4094 4092 }
4095 4093 }
4096 4094 }
4097 4095 }
4098 4096 // Report error
4099 4097 ResourceMark rm(THREAD);
4100 4098 Exceptions::fthrow(
4101 4099 THREAD_AND_LOCATION,
4102 4100 vmSymbolHandles::java_lang_ClassFormatError(),
4103 4101 "Method \"%s\" in class %s has illegal signature \"%s\"",
4104 4102 name->as_C_string(), _class_name->as_C_string(), p
4105 4103 );
4106 4104 return 0;
4107 4105 }
4108 4106
4109 4107
4110 4108 // Unqualified names may not contain the characters '.', ';', or '/'.
4111 4109 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>.
4112 4110 // Note that method names may not be <init> or <clinit> in this method.
4113 4111 // Because these names have been checked as special cases before calling this method
4114 4112 // in verify_legal_method_name.
4115 4113 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) {
4116 4114 jchar ch;
4117 4115
4118 4116 for (char* p = name; p != name + length; ) {
4119 4117 ch = *p;
4120 4118 if (ch < 128) {
4121 4119 p++;
4122 4120 if (ch == '.' || ch == ';') {
4123 4121 return false; // do not permit '.' or ';'
4124 4122 }
4125 4123 if (type != LegalClass && ch == '/') {
4126 4124 return false; // do not permit '/' unless it's class name
4127 4125 }
4128 4126 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4129 4127 return false; // do not permit '<' or '>' in method names
4130 4128 }
4131 4129 } else {
4132 4130 char* tmp_p = UTF8::next(p, &ch);
4133 4131 p = tmp_p;
4134 4132 }
4135 4133 }
4136 4134 return true;
4137 4135 }
4138 4136
4139 4137
4140 4138 // Take pointer to a string. Skip over the longest part of the string that could
4141 4139 // be taken as a fieldname. Allow '/' if slash_ok is true.
4142 4140 // Return a pointer to just past the fieldname.
4143 4141 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4144 4142 // being true, we saw consecutive slashes (meaning we were looking for a
4145 4143 // qualified path but found something that was badly-formed).
4146 4144 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4147 4145 char* p;
4148 4146 jchar ch;
4149 4147 jboolean last_is_slash = false;
4150 4148 jboolean not_first_ch = false;
4151 4149
4152 4150 for (p = name; p != name + length; not_first_ch = true) {
4153 4151 char* old_p = p;
4154 4152 ch = *p;
4155 4153 if (ch < 128) {
4156 4154 p++;
4157 4155 // quick check for ascii
4158 4156 if ((ch >= 'a' && ch <= 'z') ||
4159 4157 (ch >= 'A' && ch <= 'Z') ||
4160 4158 (ch == '_' || ch == '$') ||
4161 4159 (not_first_ch && ch >= '0' && ch <= '9')) {
4162 4160 last_is_slash = false;
4163 4161 continue;
4164 4162 }
4165 4163 if (slash_ok && ch == '/') {
4166 4164 if (last_is_slash) {
4167 4165 return NULL; // Don't permit consecutive slashes
4168 4166 }
4169 4167 last_is_slash = true;
4170 4168 continue;
4171 4169 }
4172 4170 } else {
4173 4171 jint unicode_ch;
4174 4172 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4175 4173 p = tmp_p;
4176 4174 last_is_slash = false;
4177 4175 // Check if ch is Java identifier start or is Java identifier part
4178 4176 // 4672820: call java.lang.Character methods directly without generating separate tables.
4179 4177 EXCEPTION_MARK;
4180 4178 instanceKlassHandle klass (THREAD, SystemDictionary::char_klass());
4181 4179
4182 4180 // return value
4183 4181 JavaValue result(T_BOOLEAN);
4184 4182 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4185 4183 JavaCallArguments args;
4186 4184 args.push_int(unicode_ch);
4187 4185
4188 4186 // public static boolean isJavaIdentifierStart(char ch);
4189 4187 JavaCalls::call_static(&result,
4190 4188 klass,
4191 4189 vmSymbolHandles::isJavaIdentifierStart_name(),
4192 4190 vmSymbolHandles::int_bool_signature(),
4193 4191 &args,
4194 4192 THREAD);
4195 4193
4196 4194 if (HAS_PENDING_EXCEPTION) {
4197 4195 CLEAR_PENDING_EXCEPTION;
4198 4196 return 0;
4199 4197 }
4200 4198 if (result.get_jboolean()) {
4201 4199 continue;
4202 4200 }
4203 4201
4204 4202 if (not_first_ch) {
4205 4203 // public static boolean isJavaIdentifierPart(char ch);
4206 4204 JavaCalls::call_static(&result,
4207 4205 klass,
4208 4206 vmSymbolHandles::isJavaIdentifierPart_name(),
4209 4207 vmSymbolHandles::int_bool_signature(),
4210 4208 &args,
4211 4209 THREAD);
4212 4210
4213 4211 if (HAS_PENDING_EXCEPTION) {
4214 4212 CLEAR_PENDING_EXCEPTION;
4215 4213 return 0;
4216 4214 }
4217 4215
4218 4216 if (result.get_jboolean()) {
4219 4217 continue;
4220 4218 }
4221 4219 }
4222 4220 }
4223 4221 return (not_first_ch) ? old_p : NULL;
4224 4222 }
4225 4223 return (not_first_ch) ? p : NULL;
4226 4224 }
4227 4225
4228 4226
4229 4227 // Take pointer to a string. Skip over the longest part of the string that could
4230 4228 // be taken as a field signature. Allow "void" if void_ok.
4231 4229 // Return a pointer to just past the signature.
4232 4230 // Return NULL if no legal signature is found.
4233 4231 char* ClassFileParser::skip_over_field_signature(char* signature,
4234 4232 bool void_ok,
4235 4233 unsigned int length,
4236 4234 TRAPS) {
4237 4235 unsigned int array_dim = 0;
4238 4236 while (length > 0) {
4239 4237 switch (signature[0]) {
4240 4238 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4241 4239 case JVM_SIGNATURE_BOOLEAN:
4242 4240 case JVM_SIGNATURE_BYTE:
4243 4241 case JVM_SIGNATURE_CHAR:
4244 4242 case JVM_SIGNATURE_SHORT:
4245 4243 case JVM_SIGNATURE_INT:
4246 4244 case JVM_SIGNATURE_FLOAT:
4247 4245 case JVM_SIGNATURE_LONG:
4248 4246 case JVM_SIGNATURE_DOUBLE:
4249 4247 return signature + 1;
4250 4248 case JVM_SIGNATURE_CLASS: {
4251 4249 if (_major_version < JAVA_1_5_VERSION) {
4252 4250 // Skip over the class name if one is there
4253 4251 char* p = skip_over_field_name(signature + 1, true, --length);
4254 4252
4255 4253 // The next character better be a semicolon
4256 4254 if (p && (p - signature) > 1 && p[0] == ';') {
4257 4255 return p + 1;
4258 4256 }
4259 4257 } else {
4260 4258 // 4900761: For class version > 48, any unicode is allowed in class name.
4261 4259 length--;
4262 4260 signature++;
4263 4261 while (length > 0 && signature[0] != ';') {
4264 4262 if (signature[0] == '.') {
4265 4263 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4266 4264 }
4267 4265 length--;
4268 4266 signature++;
4269 4267 }
4270 4268 if (signature[0] == ';') { return signature + 1; }
4271 4269 }
4272 4270
4273 4271 return NULL;
4274 4272 }
4275 4273 case JVM_SIGNATURE_ARRAY:
4276 4274 array_dim++;
4277 4275 if (array_dim > 255) {
4278 4276 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4279 4277 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4280 4278 }
4281 4279 // The rest of what's there better be a legal signature
4282 4280 signature++;
4283 4281 length--;
4284 4282 void_ok = false;
4285 4283 break;
4286 4284
4287 4285 default:
4288 4286 return NULL;
4289 4287 }
4290 4288 }
4291 4289 return NULL;
4292 4290 }
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