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