Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.cpp @ 165:437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
Summary: Use the gap also for a narrow oop field and a boxing object value.
Reviewed-by: coleenp, never
author | kvn |
---|---|
date | Wed, 21 May 2008 16:31:35 -0700 |
parents | 7f3a69574470 |
children | 1f809e010142 |
rev | line source |
---|---|
0 | 1 /* |
2 * Copyright 1997-2007 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 | |
136
7f3a69574470
6695506: JVM should accept classfiles with classfile version 51
kamg
parents:
113
diff
changeset
|
37 #define JAVA_MAX_SUPPORTED_VERSION 51 |
0 | 38 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 |
39 | |
40 // Used for two backward compatibility reasons: | |
41 // - to check for new additions to the class file format in JDK1.5 | |
42 // - to check for bug fixes in the format checker in JDK1.5 | |
43 #define JAVA_1_5_VERSION 49 | |
44 | |
45 // Used for backward compatibility reasons: | |
46 // - to check for javac bug fixes that happened after 1.5 | |
47 #define JAVA_6_VERSION 50 | |
48 | |
49 | |
50 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) { | |
51 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize | |
52 // this function (_current can be allocated in a register, with scalar | |
53 // replacement of aggregates). The _current pointer is copied back to | |
54 // stream() when this function returns. DON'T call another method within | |
55 // this method that uses stream(). | |
56 ClassFileStream* cfs0 = stream(); | |
57 ClassFileStream cfs1 = *cfs0; | |
58 ClassFileStream* cfs = &cfs1; | |
59 #ifdef ASSERT | |
60 u1* old_current = cfs0->current(); | |
61 #endif | |
62 | |
63 // Used for batching symbol allocations. | |
64 const char* names[SymbolTable::symbol_alloc_batch_size]; | |
65 int lengths[SymbolTable::symbol_alloc_batch_size]; | |
66 int indices[SymbolTable::symbol_alloc_batch_size]; | |
67 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; | |
68 int names_count = 0; | |
69 | |
70 // parsing Index 0 is unused | |
71 for (int index = 1; index < length; index++) { | |
72 // Each of the following case guarantees one more byte in the stream | |
73 // for the following tag or the access_flags following constant pool, | |
74 // so we don't need bounds-check for reading tag. | |
75 u1 tag = cfs->get_u1_fast(); | |
76 switch (tag) { | |
77 case JVM_CONSTANT_Class : | |
78 { | |
79 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags | |
80 u2 name_index = cfs->get_u2_fast(); | |
81 cp->klass_index_at_put(index, name_index); | |
82 } | |
83 break; | |
84 case JVM_CONSTANT_Fieldref : | |
85 { | |
86 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
87 u2 class_index = cfs->get_u2_fast(); | |
88 u2 name_and_type_index = cfs->get_u2_fast(); | |
89 cp->field_at_put(index, class_index, name_and_type_index); | |
90 } | |
91 break; | |
92 case JVM_CONSTANT_Methodref : | |
93 { | |
94 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
95 u2 class_index = cfs->get_u2_fast(); | |
96 u2 name_and_type_index = cfs->get_u2_fast(); | |
97 cp->method_at_put(index, class_index, name_and_type_index); | |
98 } | |
99 break; | |
100 case JVM_CONSTANT_InterfaceMethodref : | |
101 { | |
102 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
103 u2 class_index = cfs->get_u2_fast(); | |
104 u2 name_and_type_index = cfs->get_u2_fast(); | |
105 cp->interface_method_at_put(index, class_index, name_and_type_index); | |
106 } | |
107 break; | |
108 case JVM_CONSTANT_String : | |
109 { | |
110 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags | |
111 u2 string_index = cfs->get_u2_fast(); | |
112 cp->string_index_at_put(index, string_index); | |
113 } | |
114 break; | |
115 case JVM_CONSTANT_Integer : | |
116 { | |
117 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
118 u4 bytes = cfs->get_u4_fast(); | |
119 cp->int_at_put(index, (jint) bytes); | |
120 } | |
121 break; | |
122 case JVM_CONSTANT_Float : | |
123 { | |
124 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
125 u4 bytes = cfs->get_u4_fast(); | |
126 cp->float_at_put(index, *(jfloat*)&bytes); | |
127 } | |
128 break; | |
129 case JVM_CONSTANT_Long : | |
130 // A mangled type might cause you to overrun allocated memory | |
131 guarantee_property(index+1 < length, | |
132 "Invalid constant pool entry %u in class file %s", | |
133 index, CHECK); | |
134 { | |
135 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
136 u8 bytes = cfs->get_u8_fast(); | |
137 cp->long_at_put(index, bytes); | |
138 } | |
139 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
140 break; | |
141 case JVM_CONSTANT_Double : | |
142 // A mangled type might cause you to overrun allocated memory | |
143 guarantee_property(index+1 < length, | |
144 "Invalid constant pool entry %u in class file %s", | |
145 index, CHECK); | |
146 { | |
147 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
148 u8 bytes = cfs->get_u8_fast(); | |
149 cp->double_at_put(index, *(jdouble*)&bytes); | |
150 } | |
151 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
152 break; | |
153 case JVM_CONSTANT_NameAndType : | |
154 { | |
155 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags | |
156 u2 name_index = cfs->get_u2_fast(); | |
157 u2 signature_index = cfs->get_u2_fast(); | |
158 cp->name_and_type_at_put(index, name_index, signature_index); | |
159 } | |
160 break; | |
161 case JVM_CONSTANT_Utf8 : | |
162 { | |
163 cfs->guarantee_more(2, CHECK); // utf8_length | |
164 u2 utf8_length = cfs->get_u2_fast(); | |
165 u1* utf8_buffer = cfs->get_u1_buffer(); | |
166 assert(utf8_buffer != NULL, "null utf8 buffer"); | |
167 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. | |
168 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags | |
169 cfs->skip_u1_fast(utf8_length); | |
170 // Before storing the symbol, make sure it's legal | |
171 if (_need_verify) { | |
172 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); | |
173 } | |
174 | |
175 unsigned int hash; | |
176 symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); | |
177 if (result == NULL) { | |
178 names[names_count] = (char*)utf8_buffer; | |
179 lengths[names_count] = utf8_length; | |
180 indices[names_count] = index; | |
181 hashValues[names_count++] = hash; | |
182 if (names_count == SymbolTable::symbol_alloc_batch_size) { | |
183 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
184 names_count = 0; | |
185 } | |
186 } else { | |
187 cp->symbol_at_put(index, result); | |
188 } | |
189 } | |
190 break; | |
191 default: | |
192 classfile_parse_error( | |
193 "Unknown constant tag %u in class file %s", tag, CHECK); | |
194 break; | |
195 } | |
196 } | |
197 | |
198 // Allocate the remaining symbols | |
199 if (names_count > 0) { | |
200 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
201 } | |
202 | |
203 // Copy _current pointer of local copy back to stream(). | |
204 #ifdef ASSERT | |
205 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); | |
206 #endif | |
207 cfs0->set_current(cfs1.current()); | |
208 } | |
209 | |
210 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } | |
211 | |
212 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { | |
213 ClassFileStream* cfs = stream(); | |
214 constantPoolHandle nullHandle; | |
215 | |
216 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag | |
217 u2 length = cfs->get_u2_fast(); | |
218 guarantee_property( | |
219 length >= 1, "Illegal constant pool size %u in class file %s", | |
220 length, CHECK_(nullHandle)); | |
221 constantPoolOop constant_pool = | |
222 oopFactory::new_constantPool(length, CHECK_(nullHandle)); | |
223 constantPoolHandle cp (THREAD, constant_pool); | |
224 | |
225 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
226 | |
227 // parsing constant pool entries | |
228 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
229 | |
230 int index = 1; // declared outside of loops for portability | |
231 | |
232 // first verification pass - validate cross references and fixup class and string constants | |
233 for (index = 1; index < length; index++) { // Index 0 is unused | |
234 switch (cp->tag_at(index).value()) { | |
235 case JVM_CONSTANT_Class : | |
236 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
237 break; | |
238 case JVM_CONSTANT_Fieldref : | |
239 // fall through | |
240 case JVM_CONSTANT_Methodref : | |
241 // fall through | |
242 case JVM_CONSTANT_InterfaceMethodref : { | |
243 if (!_need_verify) break; | |
244 int klass_ref_index = cp->klass_ref_index_at(index); | |
245 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
246 check_property(valid_cp_range(klass_ref_index, length) && | |
247 cp->tag_at(klass_ref_index).is_klass_reference(), | |
248 "Invalid constant pool index %u in class file %s", | |
249 klass_ref_index, | |
250 CHECK_(nullHandle)); | |
251 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
252 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
253 "Invalid constant pool index %u in class file %s", | |
254 name_and_type_ref_index, | |
255 CHECK_(nullHandle)); | |
256 break; | |
257 } | |
258 case JVM_CONSTANT_String : | |
259 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
260 break; | |
261 case JVM_CONSTANT_Integer : | |
262 break; | |
263 case JVM_CONSTANT_Float : | |
264 break; | |
265 case JVM_CONSTANT_Long : | |
266 case JVM_CONSTANT_Double : | |
267 index++; | |
268 check_property( | |
269 (index < length && cp->tag_at(index).is_invalid()), | |
270 "Improper constant pool long/double index %u in class file %s", | |
271 index, CHECK_(nullHandle)); | |
272 break; | |
273 case JVM_CONSTANT_NameAndType : { | |
274 if (!_need_verify) break; | |
275 int name_ref_index = cp->name_ref_index_at(index); | |
276 int signature_ref_index = cp->signature_ref_index_at(index); | |
277 check_property( | |
278 valid_cp_range(name_ref_index, length) && | |
279 cp->tag_at(name_ref_index).is_utf8(), | |
280 "Invalid constant pool index %u in class file %s", | |
281 name_ref_index, CHECK_(nullHandle)); | |
282 check_property( | |
283 valid_cp_range(signature_ref_index, length) && | |
284 cp->tag_at(signature_ref_index).is_utf8(), | |
285 "Invalid constant pool index %u in class file %s", | |
286 signature_ref_index, CHECK_(nullHandle)); | |
287 break; | |
288 } | |
289 case JVM_CONSTANT_Utf8 : | |
290 break; | |
291 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
292 case JVM_CONSTANT_UnresolvedClassInError: | |
293 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
294 break; | |
295 case JVM_CONSTANT_ClassIndex : | |
296 { | |
297 int class_index = cp->klass_index_at(index); | |
298 check_property( | |
299 valid_cp_range(class_index, length) && | |
300 cp->tag_at(class_index).is_utf8(), | |
301 "Invalid constant pool index %u in class file %s", | |
302 class_index, CHECK_(nullHandle)); | |
303 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
304 } | |
305 break; | |
306 case JVM_CONSTANT_UnresolvedString : | |
307 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
308 break; | |
309 case JVM_CONSTANT_StringIndex : | |
310 { | |
311 int string_index = cp->string_index_at(index); | |
312 check_property( | |
313 valid_cp_range(string_index, length) && | |
314 cp->tag_at(string_index).is_utf8(), | |
315 "Invalid constant pool index %u in class file %s", | |
316 string_index, CHECK_(nullHandle)); | |
317 symbolOop sym = cp->symbol_at(string_index); | |
318 cp->unresolved_string_at_put(index, sym); | |
319 } | |
320 break; | |
321 default: | |
322 fatal1("bad constant pool tag value %u", cp->tag_at(index).value()); | |
323 ShouldNotReachHere(); | |
324 break; | |
325 } // end of switch | |
326 } // end of for | |
327 | |
328 if (!_need_verify) { | |
329 return cp; | |
330 } | |
331 | |
332 // second verification pass - checks the strings are of the right format. | |
333 for (index = 1; index < length; index++) { | |
334 jbyte tag = cp->tag_at(index).value(); | |
335 switch (tag) { | |
336 case JVM_CONSTANT_UnresolvedClass: { | |
337 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index)); | |
338 verify_legal_class_name(class_name, CHECK_(nullHandle)); | |
339 break; | |
340 } | |
341 case JVM_CONSTANT_Fieldref: | |
342 case JVM_CONSTANT_Methodref: | |
343 case JVM_CONSTANT_InterfaceMethodref: { | |
344 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
345 // already verified to be utf8 | |
346 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
347 // already verified to be utf8 | |
348 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
349 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
350 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index)); | |
351 if (tag == JVM_CONSTANT_Fieldref) { | |
352 verify_legal_field_name(name, CHECK_(nullHandle)); | |
353 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); | |
354 } else { | |
355 verify_legal_method_name(name, CHECK_(nullHandle)); | |
356 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
357 if (tag == JVM_CONSTANT_Methodref) { | |
358 // 4509014: If a class method name begins with '<', it must be "<init>". | |
359 assert(!name.is_null(), "method name in constant pool is null"); | |
360 unsigned int name_len = name->utf8_length(); | |
361 assert(name_len > 0, "bad method name"); // already verified as legal name | |
362 if (name->byte_at(0) == '<') { | |
363 if (name() != vmSymbols::object_initializer_name()) { | |
364 classfile_parse_error( | |
365 "Bad method name at constant pool index %u in class file %s", | |
366 name_ref_index, CHECK_(nullHandle)); | |
367 } | |
368 } | |
369 } | |
370 } | |
371 break; | |
372 } | |
373 } // end of switch | |
374 } // end of for | |
375 | |
376 return cp; | |
377 } | |
378 | |
379 | |
380 class NameSigHash: public ResourceObj { | |
381 public: | |
382 symbolOop _name; // name | |
383 symbolOop _sig; // signature | |
384 NameSigHash* _next; // Next entry in hash table | |
385 }; | |
386 | |
387 | |
388 #define HASH_ROW_SIZE 256 | |
389 | |
390 unsigned int hash(symbolOop name, symbolOop sig) { | |
391 unsigned int raw_hash = 0; | |
392 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
393 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
394 | |
395 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
396 } | |
397 | |
398 | |
399 void initialize_hashtable(NameSigHash** table) { | |
400 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
401 } | |
402 | |
403 // Return false if the name/sig combination is found in table. | |
404 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
405 // The old format checker uses heap sort to find duplicates. | |
406 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
407 // of table since we don't expect symbolOop's to move. | |
408 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) { | |
409 assert(name != NULL, "name in constant pool is NULL"); | |
410 | |
411 // First lookup for duplicates | |
412 int index = hash(name, sig); | |
413 NameSigHash* entry = table[index]; | |
414 while (entry != NULL) { | |
415 if (entry->_name == name && entry->_sig == sig) { | |
416 return false; | |
417 } | |
418 entry = entry->_next; | |
419 } | |
420 | |
421 // No duplicate is found, allocate a new entry and fill it. | |
422 entry = new NameSigHash(); | |
423 entry->_name = name; | |
424 entry->_sig = sig; | |
425 | |
426 // Insert into hash table | |
427 entry->_next = table[index]; | |
428 table[index] = entry; | |
429 | |
430 return true; | |
431 } | |
432 | |
433 | |
434 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
435 int length, | |
436 Handle class_loader, | |
437 Handle protection_domain, | |
438 PerfTraceTime* vmtimer, | |
439 symbolHandle class_name, | |
440 TRAPS) { | |
441 ClassFileStream* cfs = stream(); | |
442 assert(length > 0, "only called for length>0"); | |
443 objArrayHandle nullHandle; | |
444 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
445 objArrayHandle interfaces (THREAD, interface_oop); | |
446 | |
447 int index; | |
448 for (index = 0; index < length; index++) { | |
449 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
450 check_property( | |
451 valid_cp_range(interface_index, cp->length()) && | |
452 cp->tag_at(interface_index).is_unresolved_klass(), | |
453 "Interface name has bad constant pool index %u in class file %s", | |
454 interface_index, CHECK_(nullHandle)); | |
455 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index)); | |
456 | |
457 // Don't need to check legal name because it's checked when parsing constant pool. | |
458 // But need to make sure it's not an array type. | |
459 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
460 "Bad interface name in class file %s", CHECK_(nullHandle)); | |
461 | |
462 vmtimer->suspend(); // do not count recursive loading twice | |
463 // Call resolve_super so classcircularity is checked | |
464 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
465 unresolved_klass, class_loader, protection_domain, | |
466 false, CHECK_(nullHandle)); | |
467 KlassHandle interf (THREAD, k); | |
468 vmtimer->resume(); | |
469 | |
470 if (!Klass::cast(interf())->is_interface()) { | |
471 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
472 } | |
473 interfaces->obj_at_put(index, interf()); | |
474 } | |
475 | |
476 if (!_need_verify || length <= 1) { | |
477 return interfaces; | |
478 } | |
479 | |
480 // Check if there's any duplicates in interfaces | |
481 ResourceMark rm(THREAD); | |
482 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
483 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
484 initialize_hashtable(interface_names); | |
485 bool dup = false; | |
486 { | |
487 debug_only(No_Safepoint_Verifier nsv;) | |
488 for (index = 0; index < length; index++) { | |
489 klassOop k = (klassOop)interfaces->obj_at(index); | |
490 symbolOop name = instanceKlass::cast(k)->name(); | |
491 // If no duplicates, add (name, NULL) in hashtable interface_names. | |
492 if (!put_after_lookup(name, NULL, interface_names)) { | |
493 dup = true; | |
494 break; | |
495 } | |
496 } | |
497 } | |
498 if (dup) { | |
499 classfile_parse_error("Duplicate interface name in class file %s", | |
500 CHECK_(nullHandle)); | |
501 } | |
502 | |
503 return interfaces; | |
504 } | |
505 | |
506 | |
507 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
508 // Make sure the constant pool entry is of a type appropriate to this field | |
509 guarantee_property( | |
510 (constantvalue_index > 0 && | |
511 constantvalue_index < cp->length()), | |
512 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
513 constantvalue_index, CHECK); | |
514 constantTag value_type = cp->tag_at(constantvalue_index); | |
515 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
516 case T_LONG: | |
517 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
518 break; | |
519 case T_FLOAT: | |
520 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
521 break; | |
522 case T_DOUBLE: | |
523 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
524 break; | |
525 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
526 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
527 break; | |
528 case T_OBJECT: | |
529 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;", 18) | |
530 && (value_type.is_string() || value_type.is_unresolved_string())), | |
531 "Bad string initial value in class file %s", CHECK); | |
532 break; | |
533 default: | |
534 classfile_parse_error( | |
535 "Unable to set initial value %u in class file %s", | |
536 constantvalue_index, CHECK); | |
537 } | |
538 } | |
539 | |
540 | |
541 // Parse attributes for a field. | |
542 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
543 u2 attributes_count, | |
544 bool is_static, u2 signature_index, | |
545 u2* constantvalue_index_addr, | |
546 bool* is_synthetic_addr, | |
547 u2* generic_signature_index_addr, | |
548 typeArrayHandle* field_annotations, | |
549 TRAPS) { | |
550 ClassFileStream* cfs = stream(); | |
551 assert(attributes_count > 0, "length should be greater than 0"); | |
552 u2 constantvalue_index = 0; | |
553 u2 generic_signature_index = 0; | |
554 bool is_synthetic = false; | |
555 u1* runtime_visible_annotations = NULL; | |
556 int runtime_visible_annotations_length = 0; | |
557 u1* runtime_invisible_annotations = NULL; | |
558 int runtime_invisible_annotations_length = 0; | |
559 while (attributes_count--) { | |
560 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
561 u2 attribute_name_index = cfs->get_u2_fast(); | |
562 u4 attribute_length = cfs->get_u4_fast(); | |
563 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
564 cp->tag_at(attribute_name_index).is_utf8(), | |
565 "Invalid field attribute index %u in class file %s", | |
566 attribute_name_index, | |
567 CHECK); | |
568 symbolOop attribute_name = cp->symbol_at(attribute_name_index); | |
569 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { | |
570 // ignore if non-static | |
571 if (constantvalue_index != 0) { | |
572 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
573 } | |
574 check_property( | |
575 attribute_length == 2, | |
576 "Invalid ConstantValue field attribute length %u in class file %s", | |
577 attribute_length, CHECK); | |
578 constantvalue_index = cfs->get_u2(CHECK); | |
579 if (_need_verify) { | |
580 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
581 } | |
582 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
583 if (attribute_length != 0) { | |
584 classfile_parse_error( | |
585 "Invalid Synthetic field attribute length %u in class file %s", | |
586 attribute_length, CHECK); | |
587 } | |
588 is_synthetic = true; | |
589 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
590 if (attribute_length != 0) { | |
591 classfile_parse_error( | |
592 "Invalid Deprecated field attribute length %u in class file %s", | |
593 attribute_length, CHECK); | |
594 } | |
595 } else if (_major_version >= JAVA_1_5_VERSION) { | |
596 if (attribute_name == vmSymbols::tag_signature()) { | |
597 if (attribute_length != 2) { | |
598 classfile_parse_error( | |
599 "Wrong size %u for field's Signature attribute in class file %s", | |
600 attribute_length, CHECK); | |
601 } | |
602 generic_signature_index = cfs->get_u2(CHECK); | |
603 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
604 runtime_visible_annotations_length = attribute_length; | |
605 runtime_visible_annotations = cfs->get_u1_buffer(); | |
606 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
607 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
608 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
609 runtime_invisible_annotations_length = attribute_length; | |
610 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
611 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
612 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
613 } else { | |
614 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
615 } | |
616 } else { | |
617 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
618 } | |
619 } | |
620 | |
621 *constantvalue_index_addr = constantvalue_index; | |
622 *is_synthetic_addr = is_synthetic; | |
623 *generic_signature_index_addr = generic_signature_index; | |
624 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
625 runtime_visible_annotations_length, | |
626 runtime_invisible_annotations, | |
627 runtime_invisible_annotations_length, | |
628 CHECK); | |
629 return; | |
630 } | |
631 | |
632 | |
633 // Field allocation types. Used for computing field offsets. | |
634 | |
635 enum FieldAllocationType { | |
636 STATIC_OOP, // Oops | |
637 STATIC_BYTE, // Boolean, Byte, char | |
638 STATIC_SHORT, // shorts | |
639 STATIC_WORD, // ints | |
640 STATIC_DOUBLE, // long or double | |
641 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
642 NONSTATIC_OOP, | |
643 NONSTATIC_BYTE, | |
644 NONSTATIC_SHORT, | |
645 NONSTATIC_WORD, | |
646 NONSTATIC_DOUBLE, | |
647 NONSTATIC_ALIGNED_DOUBLE | |
648 }; | |
649 | |
650 | |
651 struct FieldAllocationCount { | |
652 int static_oop_count; | |
653 int static_byte_count; | |
654 int static_short_count; | |
655 int static_word_count; | |
656 int static_double_count; | |
657 int nonstatic_oop_count; | |
658 int nonstatic_byte_count; | |
659 int nonstatic_short_count; | |
660 int nonstatic_word_count; | |
661 int nonstatic_double_count; | |
662 }; | |
663 | |
664 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
665 struct FieldAllocationCount *fac, | |
666 objArrayHandle* fields_annotations, TRAPS) { | |
667 ClassFileStream* cfs = stream(); | |
668 typeArrayHandle nullHandle; | |
669 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
670 u2 length = cfs->get_u2_fast(); | |
671 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
672 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
673 typeArrayHandle fields(THREAD, new_fields); | |
674 | |
675 int index = 0; | |
676 typeArrayHandle field_annotations; | |
677 for (int n = 0; n < length; n++) { | |
678 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
679 | |
680 AccessFlags access_flags; | |
681 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
682 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
683 access_flags.set_flags(flags); | |
684 | |
685 u2 name_index = cfs->get_u2_fast(); | |
686 int cp_size = cp->length(); | |
687 check_property( | |
688 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
689 "Invalid constant pool index %u for field name in class file %s", | |
690 name_index, CHECK_(nullHandle)); | |
691 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
692 verify_legal_field_name(name, CHECK_(nullHandle)); | |
693 | |
694 u2 signature_index = cfs->get_u2_fast(); | |
695 check_property( | |
696 valid_cp_range(signature_index, cp_size) && | |
697 cp->tag_at(signature_index).is_utf8(), | |
698 "Invalid constant pool index %u for field signature in class file %s", | |
699 signature_index, CHECK_(nullHandle)); | |
700 symbolHandle sig(THREAD, cp->symbol_at(signature_index)); | |
701 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); | |
702 | |
703 u2 constantvalue_index = 0; | |
704 bool is_synthetic = false; | |
705 u2 generic_signature_index = 0; | |
706 bool is_static = access_flags.is_static(); | |
707 | |
708 u2 attributes_count = cfs->get_u2_fast(); | |
709 if (attributes_count > 0) { | |
710 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
711 &constantvalue_index, &is_synthetic, | |
712 &generic_signature_index, &field_annotations, | |
713 CHECK_(nullHandle)); | |
714 if (field_annotations.not_null()) { | |
715 if (fields_annotations->is_null()) { | |
716 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
717 *fields_annotations = objArrayHandle(THREAD, md); | |
718 } | |
719 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
720 } | |
721 if (is_synthetic) { | |
722 access_flags.set_is_synthetic(); | |
723 } | |
724 } | |
725 | |
726 fields->short_at_put(index++, access_flags.as_short()); | |
727 fields->short_at_put(index++, name_index); | |
728 fields->short_at_put(index++, signature_index); | |
729 fields->short_at_put(index++, constantvalue_index); | |
730 | |
731 // Remember how many oops we encountered and compute allocation type | |
732 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
733 FieldAllocationType atype; | |
734 if ( is_static ) { | |
735 switch ( type ) { | |
736 case T_BOOLEAN: | |
737 case T_BYTE: | |
738 fac->static_byte_count++; | |
739 atype = STATIC_BYTE; | |
740 break; | |
741 case T_LONG: | |
742 case T_DOUBLE: | |
743 if (Universe::field_type_should_be_aligned(type)) { | |
744 atype = STATIC_ALIGNED_DOUBLE; | |
745 } else { | |
746 atype = STATIC_DOUBLE; | |
747 } | |
748 fac->static_double_count++; | |
749 break; | |
750 case T_CHAR: | |
751 case T_SHORT: | |
752 fac->static_short_count++; | |
753 atype = STATIC_SHORT; | |
754 break; | |
755 case T_FLOAT: | |
756 case T_INT: | |
757 fac->static_word_count++; | |
758 atype = STATIC_WORD; | |
759 break; | |
760 case T_ARRAY: | |
761 case T_OBJECT: | |
762 fac->static_oop_count++; | |
763 atype = STATIC_OOP; | |
764 break; | |
765 case T_ADDRESS: | |
766 case T_VOID: | |
767 default: | |
768 assert(0, "bad field type"); | |
769 } | |
770 } else { | |
771 switch ( type ) { | |
772 case T_BOOLEAN: | |
773 case T_BYTE: | |
774 fac->nonstatic_byte_count++; | |
775 atype = NONSTATIC_BYTE; | |
776 break; | |
777 case T_LONG: | |
778 case T_DOUBLE: | |
779 if (Universe::field_type_should_be_aligned(type)) { | |
780 atype = NONSTATIC_ALIGNED_DOUBLE; | |
781 } else { | |
782 atype = NONSTATIC_DOUBLE; | |
783 } | |
784 fac->nonstatic_double_count++; | |
785 break; | |
786 case T_CHAR: | |
787 case T_SHORT: | |
788 fac->nonstatic_short_count++; | |
789 atype = NONSTATIC_SHORT; | |
790 break; | |
791 case T_FLOAT: | |
792 case T_INT: | |
793 fac->nonstatic_word_count++; | |
794 atype = NONSTATIC_WORD; | |
795 break; | |
796 case T_ARRAY: | |
797 case T_OBJECT: | |
798 fac->nonstatic_oop_count++; | |
799 atype = NONSTATIC_OOP; | |
800 break; | |
801 case T_ADDRESS: | |
802 case T_VOID: | |
803 default: | |
804 assert(0, "bad field type"); | |
805 } | |
806 } | |
807 | |
808 // The correct offset is computed later (all oop fields will be located together) | |
809 // We temporarily store the allocation type in the offset field | |
810 fields->short_at_put(index++, atype); | |
811 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
812 fields->short_at_put(index++, generic_signature_index); | |
813 } | |
814 | |
815 if (_need_verify && length > 1) { | |
816 // Check duplicated fields | |
817 ResourceMark rm(THREAD); | |
818 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
819 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
820 initialize_hashtable(names_and_sigs); | |
821 bool dup = false; | |
822 { | |
823 debug_only(No_Safepoint_Verifier nsv;) | |
824 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
825 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
826 symbolOop name = cp->symbol_at(name_index); | |
827 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); | |
828 symbolOop sig = cp->symbol_at(sig_index); | |
829 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
830 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
831 dup = true; | |
832 break; | |
833 } | |
834 } | |
835 } | |
836 if (dup) { | |
837 classfile_parse_error("Duplicate field name&signature in class file %s", | |
838 CHECK_(nullHandle)); | |
839 } | |
840 } | |
841 | |
842 return fields; | |
843 } | |
844 | |
845 | |
846 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
847 while (length-- > 0) { | |
848 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
849 } | |
850 } | |
851 | |
852 | |
853 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
854 u4 exception_table_length, | |
855 constantPoolHandle cp, | |
856 TRAPS) { | |
857 ClassFileStream* cfs = stream(); | |
858 typeArrayHandle nullHandle; | |
859 | |
860 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
861 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
862 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
863 | |
864 int index = 0; | |
865 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
866 for (unsigned int i = 0; i < exception_table_length; i++) { | |
867 u2 start_pc = cfs->get_u2_fast(); | |
868 u2 end_pc = cfs->get_u2_fast(); | |
869 u2 handler_pc = cfs->get_u2_fast(); | |
870 u2 catch_type_index = cfs->get_u2_fast(); | |
871 // Will check legal target after parsing code array in verifier. | |
872 if (_need_verify) { | |
873 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
874 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
875 guarantee_property(handler_pc < code_length, | |
876 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
877 if (catch_type_index != 0) { | |
878 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
879 (cp->tag_at(catch_type_index).is_klass() || | |
880 cp->tag_at(catch_type_index).is_unresolved_klass()), | |
881 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); | |
882 } | |
883 } | |
884 exception_handlers->int_at_put(index++, start_pc); | |
885 exception_handlers->int_at_put(index++, end_pc); | |
886 exception_handlers->int_at_put(index++, handler_pc); | |
887 exception_handlers->int_at_put(index++, catch_type_index); | |
888 } | |
889 return exception_handlers; | |
890 } | |
891 | |
892 void ClassFileParser::parse_linenumber_table( | |
893 u4 code_attribute_length, u4 code_length, | |
894 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
895 ClassFileStream* cfs = stream(); | |
896 unsigned int num_entries = cfs->get_u2(CHECK); | |
897 | |
898 // Each entry is a u2 start_pc, and a u2 line_number | |
899 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
900 | |
901 // Verify line number attribute and table length | |
902 check_property( | |
903 code_attribute_length == sizeof(u2) + length_in_bytes, | |
904 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
905 | |
906 cfs->guarantee_more(length_in_bytes, CHECK); | |
907 | |
908 if ((*write_stream) == NULL) { | |
909 if (length_in_bytes > fixed_buffer_size) { | |
910 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
911 } else { | |
912 (*write_stream) = new CompressedLineNumberWriteStream( | |
913 linenumbertable_buffer, fixed_buffer_size); | |
914 } | |
915 } | |
916 | |
917 while (num_entries-- > 0) { | |
918 u2 bci = cfs->get_u2_fast(); // start_pc | |
919 u2 line = cfs->get_u2_fast(); // line_number | |
920 guarantee_property(bci < code_length, | |
921 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
922 (*write_stream)->write_pair(bci, line); | |
923 } | |
924 } | |
925 | |
926 | |
927 // Class file LocalVariableTable elements. | |
928 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
929 public: | |
930 u2 start_bci; | |
931 u2 length; | |
932 u2 name_cp_index; | |
933 u2 descriptor_cp_index; | |
934 u2 slot; | |
935 }; | |
936 | |
937 | |
938 class LVT_Hash: public CHeapObj { | |
939 public: | |
940 LocalVariableTableElement *_elem; // element | |
941 LVT_Hash* _next; // Next entry in hash table | |
942 }; | |
943 | |
944 unsigned int hash(LocalVariableTableElement *elem) { | |
945 unsigned int raw_hash = elem->start_bci; | |
946 | |
947 raw_hash = elem->length + raw_hash * 37; | |
948 raw_hash = elem->name_cp_index + raw_hash * 37; | |
949 raw_hash = elem->slot + raw_hash * 37; | |
950 | |
951 return raw_hash % HASH_ROW_SIZE; | |
952 } | |
953 | |
954 void initialize_hashtable(LVT_Hash** table) { | |
955 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
956 table[i] = NULL; | |
957 } | |
958 } | |
959 | |
960 void clear_hashtable(LVT_Hash** table) { | |
961 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
962 LVT_Hash* current = table[i]; | |
963 LVT_Hash* next; | |
964 while (current != NULL) { | |
965 next = current->_next; | |
966 current->_next = NULL; | |
967 delete(current); | |
968 current = next; | |
969 } | |
970 table[i] = NULL; | |
971 } | |
972 } | |
973 | |
974 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
975 LVT_Hash* entry = table[index]; | |
976 | |
977 /* | |
978 * 3-tuple start_bci/length/slot has to be unique key, | |
979 * so the following comparison seems to be redundant: | |
980 * && elem->name_cp_index == entry->_elem->name_cp_index | |
981 */ | |
982 while (entry != NULL) { | |
983 if (elem->start_bci == entry->_elem->start_bci | |
984 && elem->length == entry->_elem->length | |
985 && elem->name_cp_index == entry->_elem->name_cp_index | |
986 && elem->slot == entry->_elem->slot | |
987 ) { | |
988 return entry; | |
989 } | |
990 entry = entry->_next; | |
991 } | |
992 return NULL; | |
993 } | |
994 | |
995 // Return false if the local variable is found in table. | |
996 // Return true if no duplicate is found. | |
997 // And local variable is added as a new entry in table. | |
998 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
999 // First lookup for duplicates | |
1000 int index = hash(elem); | |
1001 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
1002 | |
1003 if (entry != NULL) { | |
1004 return false; | |
1005 } | |
1006 // No duplicate is found, allocate a new entry and fill it. | |
1007 if ((entry = new LVT_Hash()) == NULL) { | |
1008 return false; | |
1009 } | |
1010 entry->_elem = elem; | |
1011 | |
1012 // Insert into hash table | |
1013 entry->_next = table[index]; | |
1014 table[index] = entry; | |
1015 | |
1016 return true; | |
1017 } | |
1018 | |
1019 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
1020 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
1021 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
1022 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
1023 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
1024 lvt->signature_cp_index = 0; | |
1025 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
1026 } | |
1027 | |
1028 // Function is used to parse both attributes: | |
1029 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
1030 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
1031 u2 max_locals, | |
1032 u4 code_attribute_length, | |
1033 constantPoolHandle cp, | |
1034 u2* localvariable_table_length, | |
1035 bool isLVTT, | |
1036 TRAPS) { | |
1037 ClassFileStream* cfs = stream(); | |
1038 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
1039 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
1040 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
1041 // Verify local variable table attribute has right length | |
1042 if (_need_verify) { | |
1043 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
1044 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
1045 } | |
1046 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
1047 assert(localvariable_table_start != NULL, "null local variable table"); | |
1048 if (!_need_verify) { | |
1049 cfs->skip_u2_fast(size); | |
1050 } else { | |
1051 cfs->guarantee_more(size * 2, CHECK_NULL); | |
1052 for(int i = 0; i < (*localvariable_table_length); i++) { | |
1053 u2 start_pc = cfs->get_u2_fast(); | |
1054 u2 length = cfs->get_u2_fast(); | |
1055 u2 name_index = cfs->get_u2_fast(); | |
1056 u2 descriptor_index = cfs->get_u2_fast(); | |
1057 u2 index = cfs->get_u2_fast(); | |
1058 // Assign to a u4 to avoid overflow | |
1059 u4 end_pc = (u4)start_pc + (u4)length; | |
1060 | |
1061 if (start_pc >= code_length) { | |
1062 classfile_parse_error( | |
1063 "Invalid start_pc %u in %s in class file %s", | |
1064 start_pc, tbl_name, CHECK_NULL); | |
1065 } | |
1066 if (end_pc > code_length) { | |
1067 classfile_parse_error( | |
1068 "Invalid length %u in %s in class file %s", | |
1069 length, tbl_name, CHECK_NULL); | |
1070 } | |
1071 int cp_size = cp->length(); | |
1072 guarantee_property( | |
1073 valid_cp_range(name_index, cp_size) && | |
1074 cp->tag_at(name_index).is_utf8(), | |
1075 "Name index %u in %s has bad constant type in class file %s", | |
1076 name_index, tbl_name, CHECK_NULL); | |
1077 guarantee_property( | |
1078 valid_cp_range(descriptor_index, cp_size) && | |
1079 cp->tag_at(descriptor_index).is_utf8(), | |
1080 "Signature index %u in %s has bad constant type in class file %s", | |
1081 descriptor_index, tbl_name, CHECK_NULL); | |
1082 | |
1083 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
1084 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index)); | |
1085 verify_legal_field_name(name, CHECK_NULL); | |
1086 u2 extra_slot = 0; | |
1087 if (!isLVTT) { | |
1088 verify_legal_field_signature(name, sig, CHECK_NULL); | |
1089 | |
1090 // 4894874: check special cases for double and long local variables | |
1091 if (sig() == vmSymbols::type_signature(T_DOUBLE) || | |
1092 sig() == vmSymbols::type_signature(T_LONG)) { | |
1093 extra_slot = 1; | |
1094 } | |
1095 } | |
1096 guarantee_property((index + extra_slot) < max_locals, | |
1097 "Invalid index %u in %s in class file %s", | |
1098 index, tbl_name, CHECK_NULL); | |
1099 } | |
1100 } | |
1101 return localvariable_table_start; | |
1102 } | |
1103 | |
1104 | |
1105 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
1106 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
1107 ClassFileStream* cfs = stream(); | |
1108 u2 index = 0; // index in the array with long/double occupying two slots | |
1109 u4 i1 = *u1_index; | |
1110 u4 i2 = *u2_index + 1; | |
1111 for(int i = 0; i < array_length; i++) { | |
1112 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
1113 index++; | |
1114 if (tag == ITEM_Long || tag == ITEM_Double) { | |
1115 index++; | |
1116 } else if (tag == ITEM_Object) { | |
1117 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
1118 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
1119 cp->tag_at(class_index).is_unresolved_klass(), | |
1120 "Bad class index %u in StackMap in class file %s", | |
1121 class_index, CHECK); | |
1122 } else if (tag == ITEM_Uninitialized) { | |
1123 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
1124 guarantee_property( | |
1125 offset < code_length, | |
1126 "Bad uninitialized type offset %u in StackMap in class file %s", | |
1127 offset, CHECK); | |
1128 } else { | |
1129 guarantee_property( | |
1130 tag <= (u1)ITEM_Uninitialized, | |
1131 "Unknown variable type %u in StackMap in class file %s", | |
1132 tag, CHECK); | |
1133 } | |
1134 } | |
1135 u2_array[*u2_index] = index; | |
1136 *u1_index = i1; | |
1137 *u2_index = i2; | |
1138 } | |
1139 | |
1140 typeArrayOop ClassFileParser::parse_stackmap_table( | |
1141 u4 code_attribute_length, TRAPS) { | |
1142 if (code_attribute_length == 0) | |
1143 return NULL; | |
1144 | |
1145 ClassFileStream* cfs = stream(); | |
1146 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
1147 assert(stackmap_table_start != NULL, "null stackmap table"); | |
1148 | |
1149 // check code_attribute_length first | |
1150 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
1151 | |
1152 if (!_need_verify && !DumpSharedSpaces) { | |
1153 return NULL; | |
1154 } | |
1155 | |
1156 typeArrayOop stackmap_data = | |
1157 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
1158 | |
1159 stackmap_data->set_length(code_attribute_length); | |
1160 memcpy((void*)stackmap_data->byte_at_addr(0), | |
1161 (void*)stackmap_table_start, code_attribute_length); | |
1162 return stackmap_data; | |
1163 } | |
1164 | |
1165 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
1166 u4 method_attribute_length, | |
1167 constantPoolHandle cp, TRAPS) { | |
1168 ClassFileStream* cfs = stream(); | |
1169 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
1170 *checked_exceptions_length = cfs->get_u2_fast(); | |
1171 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
1172 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
1173 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
1174 if (!_need_verify) { | |
1175 cfs->skip_u2_fast(size); | |
1176 } else { | |
1177 // Verify each value in the checked exception table | |
1178 u2 checked_exception; | |
1179 u2 len = *checked_exceptions_length; | |
1180 cfs->guarantee_more(2 * len, CHECK_NULL); | |
1181 for (int i = 0; i < len; i++) { | |
1182 checked_exception = cfs->get_u2_fast(); | |
1183 check_property( | |
1184 valid_cp_range(checked_exception, cp->length()) && | |
1185 cp->tag_at(checked_exception).is_klass_reference(), | |
1186 "Exception name has bad type at constant pool %u in class file %s", | |
1187 checked_exception, CHECK_NULL); | |
1188 } | |
1189 } | |
1190 // check exceptions attribute length | |
1191 if (_need_verify) { | |
1192 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
1193 sizeof(u2) * size), | |
1194 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
1195 } | |
1196 return checked_exceptions_start; | |
1197 } | |
1198 | |
1199 | |
1200 #define MAX_ARGS_SIZE 255 | |
1201 #define MAX_CODE_SIZE 65535 | |
1202 #define INITIAL_MAX_LVT_NUMBER 256 | |
1203 | |
1204 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
1205 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
1206 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
1207 // entire method attribute is parsed. | |
1208 // | |
1209 // The promoted_flags parameter is used to pass relevant access_flags | |
1210 // from the method back up to the containing klass. These flag values | |
1211 // are added to klass's access_flags. | |
1212 | |
1213 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
1214 AccessFlags *promoted_flags, | |
1215 typeArrayHandle* method_annotations, | |
1216 typeArrayHandle* method_parameter_annotations, | |
1217 typeArrayHandle* method_default_annotations, | |
1218 TRAPS) { | |
1219 ClassFileStream* cfs = stream(); | |
1220 methodHandle nullHandle; | |
1221 ResourceMark rm(THREAD); | |
1222 // Parse fixed parts | |
1223 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
1224 | |
1225 int flags = cfs->get_u2_fast(); | |
1226 u2 name_index = cfs->get_u2_fast(); | |
1227 int cp_size = cp->length(); | |
1228 check_property( | |
1229 valid_cp_range(name_index, cp_size) && | |
1230 cp->tag_at(name_index).is_utf8(), | |
1231 "Illegal constant pool index %u for method name in class file %s", | |
1232 name_index, CHECK_(nullHandle)); | |
1233 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
1234 verify_legal_method_name(name, CHECK_(nullHandle)); | |
1235 | |
1236 u2 signature_index = cfs->get_u2_fast(); | |
1237 guarantee_property( | |
1238 valid_cp_range(signature_index, cp_size) && | |
1239 cp->tag_at(signature_index).is_utf8(), | |
1240 "Illegal constant pool index %u for method signature in class file %s", | |
1241 signature_index, CHECK_(nullHandle)); | |
1242 symbolHandle signature(THREAD, cp->symbol_at(signature_index)); | |
1243 | |
1244 AccessFlags access_flags; | |
1245 if (name == vmSymbols::class_initializer_name()) { | |
1246 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
1247 flags = JVM_ACC_STATIC; | |
1248 } else { | |
1249 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
1250 } | |
1251 | |
1252 int args_size = -1; // only used when _need_verify is true | |
1253 if (_need_verify) { | |
1254 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
1255 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
1256 if (args_size > MAX_ARGS_SIZE) { | |
1257 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
1258 } | |
1259 } | |
1260 | |
1261 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
1262 | |
1263 // Default values for code and exceptions attribute elements | |
1264 u2 max_stack = 0; | |
1265 u2 max_locals = 0; | |
1266 u4 code_length = 0; | |
1267 u1* code_start = 0; | |
1268 u2 exception_table_length = 0; | |
1269 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
1270 u2 checked_exceptions_length = 0; | |
1271 u2* checked_exceptions_start = NULL; | |
1272 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
1273 int linenumber_table_length = 0; | |
1274 int total_lvt_length = 0; | |
1275 u2 lvt_cnt = 0; | |
1276 u2 lvtt_cnt = 0; | |
1277 bool lvt_allocated = false; | |
1278 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
1279 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
1280 u2* localvariable_table_length; | |
1281 u2** localvariable_table_start; | |
1282 u2* localvariable_type_table_length; | |
1283 u2** localvariable_type_table_start; | |
1284 bool parsed_code_attribute = false; | |
1285 bool parsed_checked_exceptions_attribute = false; | |
1286 bool parsed_stackmap_attribute = false; | |
1287 // stackmap attribute - JDK1.5 | |
1288 typeArrayHandle stackmap_data; | |
1289 u2 generic_signature_index = 0; | |
1290 u1* runtime_visible_annotations = NULL; | |
1291 int runtime_visible_annotations_length = 0; | |
1292 u1* runtime_invisible_annotations = NULL; | |
1293 int runtime_invisible_annotations_length = 0; | |
1294 u1* runtime_visible_parameter_annotations = NULL; | |
1295 int runtime_visible_parameter_annotations_length = 0; | |
1296 u1* runtime_invisible_parameter_annotations = NULL; | |
1297 int runtime_invisible_parameter_annotations_length = 0; | |
1298 u1* annotation_default = NULL; | |
1299 int annotation_default_length = 0; | |
1300 | |
1301 // Parse code and exceptions attribute | |
1302 u2 method_attributes_count = cfs->get_u2_fast(); | |
1303 while (method_attributes_count--) { | |
1304 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
1305 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
1306 u4 method_attribute_length = cfs->get_u4_fast(); | |
1307 check_property( | |
1308 valid_cp_range(method_attribute_name_index, cp_size) && | |
1309 cp->tag_at(method_attribute_name_index).is_utf8(), | |
1310 "Invalid method attribute name index %u in class file %s", | |
1311 method_attribute_name_index, CHECK_(nullHandle)); | |
1312 | |
1313 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index); | |
1314 if (method_attribute_name == vmSymbols::tag_code()) { | |
1315 // Parse Code attribute | |
1316 if (_need_verify) { | |
1317 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
1318 "Code attribute in native or abstract methods in class file %s", | |
1319 CHECK_(nullHandle)); | |
1320 } | |
1321 if (parsed_code_attribute) { | |
1322 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
1323 } | |
1324 parsed_code_attribute = true; | |
1325 | |
1326 // Stack size, locals size, and code size | |
1327 if (_major_version == 45 && _minor_version <= 2) { | |
1328 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
1329 max_stack = cfs->get_u1_fast(); | |
1330 max_locals = cfs->get_u1_fast(); | |
1331 code_length = cfs->get_u2_fast(); | |
1332 } else { | |
1333 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
1334 max_stack = cfs->get_u2_fast(); | |
1335 max_locals = cfs->get_u2_fast(); | |
1336 code_length = cfs->get_u4_fast(); | |
1337 } | |
1338 if (_need_verify) { | |
1339 guarantee_property(args_size <= max_locals, | |
1340 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
1341 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
1342 "Invalid method Code length %u in class file %s", | |
1343 code_length, CHECK_(nullHandle)); | |
1344 } | |
1345 // Code pointer | |
1346 code_start = cfs->get_u1_buffer(); | |
1347 assert(code_start != NULL, "null code start"); | |
1348 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
1349 cfs->skip_u1_fast(code_length); | |
1350 | |
1351 // Exception handler table | |
1352 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
1353 exception_table_length = cfs->get_u2_fast(); | |
1354 if (exception_table_length > 0) { | |
1355 exception_handlers = | |
1356 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
1357 } | |
1358 | |
1359 // Parse additional attributes in code attribute | |
1360 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
1361 u2 code_attributes_count = cfs->get_u2_fast(); | |
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1362 |
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1363 unsigned int calculated_attribute_length = 0; |
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1364 |
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1365 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1366 calculated_attribute_length = |
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1367 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1368 } else { |
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1369 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1370 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1371 } |
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1372 calculated_attribute_length += |
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1373 code_length + |
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1374 sizeof(exception_table_length) + |
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1375 sizeof(code_attributes_count) + |
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1376 exception_table_length * |
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1377 ( sizeof(u2) + // start_pc |
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1378 sizeof(u2) + // end_pc |
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1379 sizeof(u2) + // handler_pc |
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1380 sizeof(u2) ); // catch_type_index |
0 | 1381 |
1382 while (code_attributes_count--) { | |
1383 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
1384 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
1385 u4 code_attribute_length = cfs->get_u4_fast(); | |
1386 calculated_attribute_length += code_attribute_length + | |
1387 sizeof(code_attribute_name_index) + | |
1388 sizeof(code_attribute_length); | |
1389 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
1390 cp->tag_at(code_attribute_name_index).is_utf8(), | |
1391 "Invalid code attribute name index %u in class file %s", | |
1392 code_attribute_name_index, | |
1393 CHECK_(nullHandle)); | |
1394 if (LoadLineNumberTables && | |
1395 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
1396 // Parse and compress line number table | |
1397 parse_linenumber_table(code_attribute_length, code_length, | |
1398 &linenumber_table, CHECK_(nullHandle)); | |
1399 | |
1400 } else if (LoadLocalVariableTables && | |
1401 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
1402 // Parse local variable table | |
1403 if (!lvt_allocated) { | |
1404 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1405 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1406 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1407 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1408 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1409 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1410 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1411 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1412 lvt_allocated = true; | |
1413 } | |
1414 if (lvt_cnt == max_lvt_cnt) { | |
1415 max_lvt_cnt <<= 1; | |
1416 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
1417 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
1418 } | |
1419 localvariable_table_start[lvt_cnt] = | |
1420 parse_localvariable_table(code_length, | |
1421 max_locals, | |
1422 code_attribute_length, | |
1423 cp, | |
1424 &localvariable_table_length[lvt_cnt], | |
1425 false, // is not LVTT | |
1426 CHECK_(nullHandle)); | |
1427 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
1428 lvt_cnt++; | |
1429 } else if (LoadLocalVariableTypeTables && | |
1430 _major_version >= JAVA_1_5_VERSION && | |
1431 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
1432 if (!lvt_allocated) { | |
1433 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1434 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1435 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1436 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1437 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1438 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1439 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1440 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1441 lvt_allocated = true; | |
1442 } | |
1443 // Parse local variable type table | |
1444 if (lvtt_cnt == max_lvtt_cnt) { | |
1445 max_lvtt_cnt <<= 1; | |
1446 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
1447 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
1448 } | |
1449 localvariable_type_table_start[lvtt_cnt] = | |
1450 parse_localvariable_table(code_length, | |
1451 max_locals, | |
1452 code_attribute_length, | |
1453 cp, | |
1454 &localvariable_type_table_length[lvtt_cnt], | |
1455 true, // is LVTT | |
1456 CHECK_(nullHandle)); | |
1457 lvtt_cnt++; | |
1458 } else if (UseSplitVerifier && | |
1459 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
1460 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
1461 // Stack map is only needed by the new verifier in JDK1.5. | |
1462 if (parsed_stackmap_attribute) { | |
1463 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
1464 } | |
1465 typeArrayOop sm = | |
1466 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
1467 stackmap_data = typeArrayHandle(THREAD, sm); | |
1468 parsed_stackmap_attribute = true; | |
1469 } else { | |
1470 // Skip unknown attributes | |
1471 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
1472 } | |
1473 } | |
1474 // check method attribute length | |
1475 if (_need_verify) { | |
1476 guarantee_property(method_attribute_length == calculated_attribute_length, | |
1477 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
1478 } | |
1479 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
1480 // Parse Exceptions attribute | |
1481 if (parsed_checked_exceptions_attribute) { | |
1482 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
1483 } | |
1484 parsed_checked_exceptions_attribute = true; | |
1485 checked_exceptions_start = | |
1486 parse_checked_exceptions(&checked_exceptions_length, | |
1487 method_attribute_length, | |
1488 cp, CHECK_(nullHandle)); | |
1489 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
1490 if (method_attribute_length != 0) { | |
1491 classfile_parse_error( | |
1492 "Invalid Synthetic method attribute length %u in class file %s", | |
1493 method_attribute_length, CHECK_(nullHandle)); | |
1494 } | |
1495 // Should we check that there hasn't already been a synthetic attribute? | |
1496 access_flags.set_is_synthetic(); | |
1497 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
1498 if (method_attribute_length != 0) { | |
1499 classfile_parse_error( | |
1500 "Invalid Deprecated method attribute length %u in class file %s", | |
1501 method_attribute_length, CHECK_(nullHandle)); | |
1502 } | |
1503 } else if (_major_version >= JAVA_1_5_VERSION) { | |
1504 if (method_attribute_name == vmSymbols::tag_signature()) { | |
1505 if (method_attribute_length != 2) { | |
1506 classfile_parse_error( | |
1507 "Invalid Signature attribute length %u in class file %s", | |
1508 method_attribute_length, CHECK_(nullHandle)); | |
1509 } | |
1510 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
1511 generic_signature_index = cfs->get_u2_fast(); | |
1512 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
1513 runtime_visible_annotations_length = method_attribute_length; | |
1514 runtime_visible_annotations = cfs->get_u1_buffer(); | |
1515 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
1516 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
1517 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
1518 runtime_invisible_annotations_length = method_attribute_length; | |
1519 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
1520 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
1521 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
1522 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
1523 runtime_visible_parameter_annotations_length = method_attribute_length; | |
1524 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
1525 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
1526 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
1527 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
1528 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
1529 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
1530 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
1531 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
1532 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
1533 annotation_default_length = method_attribute_length; | |
1534 annotation_default = cfs->get_u1_buffer(); | |
1535 assert(annotation_default != NULL, "null annotation default"); | |
1536 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
1537 } else { | |
1538 // Skip unknown attributes | |
1539 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
1540 } | |
1541 } else { | |
1542 // Skip unknown attributes | |
1543 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
1544 } | |
1545 } | |
1546 | |
1547 if (linenumber_table != NULL) { | |
1548 linenumber_table->write_terminator(); | |
1549 linenumber_table_length = linenumber_table->position(); | |
1550 } | |
1551 | |
1552 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
1553 if (_need_verify) { | |
1554 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
1555 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
1556 } | |
1557 | |
1558 // All sizing information for a methodOop is finally available, now create it | |
1559 methodOop m_oop = oopFactory::new_method( | |
1560 code_length, access_flags, linenumber_table_length, | |
1561 total_lvt_length, checked_exceptions_length, CHECK_(nullHandle)); | |
1562 methodHandle m (THREAD, m_oop); | |
1563 | |
1564 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
1565 | |
1566 // Fill in information from fixed part (access_flags already set) | |
1567 m->set_constants(cp()); | |
1568 m->set_name_index(name_index); | |
1569 m->set_signature_index(signature_index); | |
1570 m->set_generic_signature_index(generic_signature_index); | |
1571 #ifdef CC_INTERP | |
1572 // hmm is there a gc issue here?? | |
1573 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
1574 m->set_result_index(rtf.type()); | |
1575 #endif | |
1576 | |
1577 if (args_size >= 0) { | |
1578 m->set_size_of_parameters(args_size); | |
1579 } else { | |
1580 m->compute_size_of_parameters(THREAD); | |
1581 } | |
1582 #ifdef ASSERT | |
1583 if (args_size >= 0) { | |
1584 m->compute_size_of_parameters(THREAD); | |
1585 assert(args_size == m->size_of_parameters(), ""); | |
1586 } | |
1587 #endif | |
1588 | |
1589 // Fill in code attribute information | |
1590 m->set_max_stack(max_stack); | |
1591 m->set_max_locals(max_locals); | |
1592 m->constMethod()->set_stackmap_data(stackmap_data()); | |
1593 | |
1594 /** | |
1595 * The exception_table field is the flag used to indicate | |
1596 * that the methodOop and it's associated constMethodOop are partially | |
1597 * initialized and thus are exempt from pre/post GC verification. Once | |
1598 * the field is set, the oops are considered fully initialized so make | |
1599 * sure that the oops can pass verification when this field is set. | |
1600 */ | |
1601 m->set_exception_table(exception_handlers()); | |
1602 | |
1603 // Copy byte codes | |
1604 if (code_length > 0) { | |
1605 memcpy(m->code_base(), code_start, code_length); | |
1606 } | |
1607 | |
1608 // Copy line number table | |
1609 if (linenumber_table != NULL) { | |
1610 memcpy(m->compressed_linenumber_table(), | |
1611 linenumber_table->buffer(), linenumber_table_length); | |
1612 } | |
1613 | |
1614 // Copy checked exceptions | |
1615 if (checked_exceptions_length > 0) { | |
1616 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
1617 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
1618 } | |
1619 | |
1620 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
1621 * | |
1622 * Rules for LVT's and LVTT's are: | |
1623 * - There can be any number of LVT's and LVTT's. | |
1624 * - If there are n LVT's, it is the same as if there was just | |
1625 * one LVT containing all the entries from the n LVT's. | |
1626 * - There may be no more than one LVT entry per local variable. | |
1627 * Two LVT entries are 'equal' if these fields are the same: | |
1628 * start_pc, length, name, slot | |
1629 * - There may be no more than one LVTT entry per each LVT entry. | |
1630 * Each LVTT entry has to match some LVT entry. | |
1631 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
1632 */ | |
1633 if (total_lvt_length > 0) { | |
1634 int tbl_no, idx; | |
1635 | |
1636 promoted_flags->set_has_localvariable_table(); | |
1637 | |
1638 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
1639 initialize_hashtable(lvt_Hash); | |
1640 | |
1641 // To fill LocalVariableTable in | |
1642 Classfile_LVT_Element* cf_lvt; | |
1643 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
1644 | |
1645 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
1646 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
1647 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
1648 copy_lvt_element(&cf_lvt[idx], lvt); | |
1649 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
1650 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
1651 && _need_verify | |
1652 && _major_version >= JAVA_1_5_VERSION ) { | |
1653 clear_hashtable(lvt_Hash); | |
1654 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
1655 "entry for '%s' in class file %s", | |
1656 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
1657 CHECK_(nullHandle)); | |
1658 } | |
1659 } | |
1660 } | |
1661 | |
1662 // To merge LocalVariableTable and LocalVariableTypeTable | |
1663 Classfile_LVT_Element* cf_lvtt; | |
1664 LocalVariableTableElement lvtt_elem; | |
1665 | |
1666 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
1667 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
1668 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
1669 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
1670 int index = hash(&lvtt_elem); | |
1671 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
1672 if (entry == NULL) { | |
1673 if (_need_verify) { | |
1674 clear_hashtable(lvt_Hash); | |
1675 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
1676 "does not match any LVT entry", | |
1677 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
1678 CHECK_(nullHandle)); | |
1679 } | |
1680 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
1681 clear_hashtable(lvt_Hash); | |
1682 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
1683 "entry for '%s' in class file %s", | |
1684 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
1685 CHECK_(nullHandle)); | |
1686 } else { | |
1687 // to add generic signatures into LocalVariableTable | |
1688 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
1689 } | |
1690 } | |
1691 } | |
1692 clear_hashtable(lvt_Hash); | |
1693 } | |
1694 | |
1695 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
1696 runtime_visible_annotations_length, | |
1697 runtime_invisible_annotations, | |
1698 runtime_invisible_annotations_length, | |
1699 CHECK_(nullHandle)); | |
1700 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
1701 runtime_visible_parameter_annotations_length, | |
1702 runtime_invisible_parameter_annotations, | |
1703 runtime_invisible_parameter_annotations_length, | |
1704 CHECK_(nullHandle)); | |
1705 *method_default_annotations = assemble_annotations(annotation_default, | |
1706 annotation_default_length, | |
1707 NULL, | |
1708 0, | |
1709 CHECK_(nullHandle)); | |
1710 | |
1711 if (name() == vmSymbols::finalize_method_name() && | |
1712 signature() == vmSymbols::void_method_signature()) { | |
1713 if (m->is_empty_method()) { | |
1714 _has_empty_finalizer = true; | |
1715 } else { | |
1716 _has_finalizer = true; | |
1717 } | |
1718 } | |
1719 if (name() == vmSymbols::object_initializer_name() && | |
1720 signature() == vmSymbols::void_method_signature() && | |
1721 m->is_vanilla_constructor()) { | |
1722 _has_vanilla_constructor = true; | |
1723 } | |
1724 | |
1725 return m; | |
1726 } | |
1727 | |
1728 | |
1729 // The promoted_flags parameter is used to pass relevant access_flags | |
1730 // from the methods back up to the containing klass. These flag values | |
1731 // are added to klass's access_flags. | |
1732 | |
1733 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
1734 AccessFlags* promoted_flags, | |
1735 bool* has_final_method, | |
1736 objArrayOop* methods_annotations_oop, | |
1737 objArrayOop* methods_parameter_annotations_oop, | |
1738 objArrayOop* methods_default_annotations_oop, | |
1739 TRAPS) { | |
1740 ClassFileStream* cfs = stream(); | |
1741 objArrayHandle nullHandle; | |
1742 typeArrayHandle method_annotations; | |
1743 typeArrayHandle method_parameter_annotations; | |
1744 typeArrayHandle method_default_annotations; | |
1745 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
1746 u2 length = cfs->get_u2_fast(); | |
1747 if (length == 0) { | |
1748 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
1749 } else { | |
1750 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1751 objArrayHandle methods(THREAD, m); | |
1752 HandleMark hm(THREAD); | |
1753 objArrayHandle methods_annotations; | |
1754 objArrayHandle methods_parameter_annotations; | |
1755 objArrayHandle methods_default_annotations; | |
1756 for (int index = 0; index < length; index++) { | |
1757 methodHandle method = parse_method(cp, is_interface, | |
1758 promoted_flags, | |
1759 &method_annotations, | |
1760 &method_parameter_annotations, | |
1761 &method_default_annotations, | |
1762 CHECK_(nullHandle)); | |
1763 if (method->is_final()) { | |
1764 *has_final_method = true; | |
1765 } | |
1766 methods->obj_at_put(index, method()); | |
1767 if (method_annotations.not_null()) { | |
1768 if (methods_annotations.is_null()) { | |
1769 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1770 methods_annotations = objArrayHandle(THREAD, md); | |
1771 } | |
1772 methods_annotations->obj_at_put(index, method_annotations()); | |
1773 } | |
1774 if (method_parameter_annotations.not_null()) { | |
1775 if (methods_parameter_annotations.is_null()) { | |
1776 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1777 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
1778 } | |
1779 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
1780 } | |
1781 if (method_default_annotations.not_null()) { | |
1782 if (methods_default_annotations.is_null()) { | |
1783 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1784 methods_default_annotations = objArrayHandle(THREAD, md); | |
1785 } | |
1786 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
1787 } | |
1788 } | |
1789 if (_need_verify && length > 1) { | |
1790 // Check duplicated methods | |
1791 ResourceMark rm(THREAD); | |
1792 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1793 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
1794 initialize_hashtable(names_and_sigs); | |
1795 bool dup = false; | |
1796 { | |
1797 debug_only(No_Safepoint_Verifier nsv;) | |
1798 for (int i = 0; i < length; i++) { | |
1799 methodOop m = (methodOop)methods->obj_at(i); | |
1800 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
1801 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
1802 dup = true; | |
1803 break; | |
1804 } | |
1805 } | |
1806 } | |
1807 if (dup) { | |
1808 classfile_parse_error("Duplicate method name&signature in class file %s", | |
1809 CHECK_(nullHandle)); | |
1810 } | |
1811 } | |
1812 | |
1813 *methods_annotations_oop = methods_annotations(); | |
1814 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
1815 *methods_default_annotations_oop = methods_default_annotations(); | |
1816 | |
1817 return methods; | |
1818 } | |
1819 } | |
1820 | |
1821 | |
1822 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
1823 objArrayHandle methods_annotations, | |
1824 objArrayHandle methods_parameter_annotations, | |
1825 objArrayHandle methods_default_annotations, | |
1826 TRAPS) { | |
1827 typeArrayHandle nullHandle; | |
1828 int length = methods()->length(); | |
1829 // If JVMTI original method ordering is enabled we have to | |
1830 // remember the original class file ordering. | |
1831 // We temporarily use the vtable_index field in the methodOop to store the | |
1832 // class file index, so we can read in after calling qsort. | |
1833 if (JvmtiExport::can_maintain_original_method_order()) { | |
1834 for (int index = 0; index < length; index++) { | |
1835 methodOop m = methodOop(methods->obj_at(index)); | |
1836 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
1837 m->set_vtable_index(index); | |
1838 } | |
1839 } | |
1840 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
1841 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare | |
1842 methodOopDesc::sort_methods(methods(), | |
1843 methods_annotations(), | |
1844 methods_parameter_annotations(), | |
1845 methods_default_annotations()); | |
1846 | |
1847 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
1848 if (JvmtiExport::can_maintain_original_method_order()) { | |
1849 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
1850 typeArrayHandle method_ordering(THREAD, new_ordering); | |
1851 for (int index = 0; index < length; index++) { | |
1852 methodOop m = methodOop(methods->obj_at(index)); | |
1853 int old_index = m->vtable_index(); | |
1854 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
1855 method_ordering->int_at_put(index, old_index); | |
1856 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
1857 } | |
1858 return method_ordering; | |
1859 } else { | |
1860 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
1861 } | |
1862 } | |
1863 | |
1864 | |
1865 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
1866 ClassFileStream* cfs = stream(); | |
1867 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
1868 u2 sourcefile_index = cfs->get_u2_fast(); | |
1869 check_property( | |
1870 valid_cp_range(sourcefile_index, cp->length()) && | |
1871 cp->tag_at(sourcefile_index).is_utf8(), | |
1872 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
1873 sourcefile_index, CHECK); | |
1874 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
1875 } | |
1876 | |
1877 | |
1878 | |
1879 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
1880 instanceKlassHandle k, | |
1881 int length, TRAPS) { | |
1882 ClassFileStream* cfs = stream(); | |
1883 u1* sde_buffer = cfs->get_u1_buffer(); | |
1884 assert(sde_buffer != NULL, "null sde buffer"); | |
1885 | |
1886 // Don't bother storing it if there is no way to retrieve it | |
1887 if (JvmtiExport::can_get_source_debug_extension()) { | |
1888 // Optimistically assume that only 1 byte UTF format is used | |
1889 // (common case) | |
1890 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer, | |
1891 length, CHECK); | |
1892 k->set_source_debug_extension(sde_symbol); | |
1893 } | |
1894 // Got utf8 string, set stream position forward | |
1895 cfs->skip_u1(length, CHECK); | |
1896 } | |
1897 | |
1898 | |
1899 // Inner classes can be static, private or protected (classic VM does this) | |
1900 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
1901 | |
1902 // Return number of classes in the inner classes attribute table | |
1903 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
1904 ClassFileStream* cfs = stream(); | |
1905 cfs->guarantee_more(2, CHECK_0); // length | |
1906 u2 length = cfs->get_u2_fast(); | |
1907 | |
1908 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
1909 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
1910 typeArrayHandle inner_classes(THREAD, ic); | |
1911 int index = 0; | |
1912 int cp_size = cp->length(); | |
1913 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
1914 for (int n = 0; n < length; n++) { | |
1915 // Inner class index | |
1916 u2 inner_class_info_index = cfs->get_u2_fast(); | |
1917 check_property( | |
1918 inner_class_info_index == 0 || | |
1919 (valid_cp_range(inner_class_info_index, cp_size) && | |
1920 cp->tag_at(inner_class_info_index).is_klass_reference()), | |
1921 "inner_class_info_index %u has bad constant type in class file %s", | |
1922 inner_class_info_index, CHECK_0); | |
1923 // Outer class index | |
1924 u2 outer_class_info_index = cfs->get_u2_fast(); | |
1925 check_property( | |
1926 outer_class_info_index == 0 || | |
1927 (valid_cp_range(outer_class_info_index, cp_size) && | |
1928 cp->tag_at(outer_class_info_index).is_klass_reference()), | |
1929 "outer_class_info_index %u has bad constant type in class file %s", | |
1930 outer_class_info_index, CHECK_0); | |
1931 // Inner class name | |
1932 u2 inner_name_index = cfs->get_u2_fast(); | |
1933 check_property( | |
1934 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
1935 cp->tag_at(inner_name_index).is_utf8()), | |
1936 "inner_name_index %u has bad constant type in class file %s", | |
1937 inner_name_index, CHECK_0); | |
1938 if (_need_verify) { | |
1939 guarantee_property(inner_class_info_index != outer_class_info_index, | |
1940 "Class is both outer and inner class in class file %s", CHECK_0); | |
1941 } | |
1942 // Access flags | |
1943 AccessFlags inner_access_flags; | |
1944 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
1945 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
1946 // Set abstract bit for old class files for backward compatibility | |
1947 flags |= JVM_ACC_ABSTRACT; | |
1948 } | |
1949 verify_legal_class_modifiers(flags, CHECK_0); | |
1950 inner_access_flags.set_flags(flags); | |
1951 | |
1952 inner_classes->short_at_put(index++, inner_class_info_index); | |
1953 inner_classes->short_at_put(index++, outer_class_info_index); | |
1954 inner_classes->short_at_put(index++, inner_name_index); | |
1955 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
1956 } | |
1957 | |
1958 // 4347400: make sure there's no duplicate entry in the classes array | |
1959 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
1960 for(int i = 0; i < inner_classes->length(); i += 4) { | |
1961 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
1962 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
1963 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
1964 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
1965 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
1966 "Duplicate entry in InnerClasses in class file %s", | |
1967 CHECK_0); | |
1968 } | |
1969 } | |
1970 } | |
1971 | |
1972 // Update instanceKlass with inner class info. | |
1973 k->set_inner_classes(inner_classes()); | |
1974 return length; | |
1975 } | |
1976 | |
1977 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
1978 k->set_is_synthetic(); | |
1979 } | |
1980 | |
1981 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
1982 ClassFileStream* cfs = stream(); | |
1983 u2 signature_index = cfs->get_u2(CHECK); | |
1984 check_property( | |
1985 valid_cp_range(signature_index, cp->length()) && | |
1986 cp->tag_at(signature_index).is_utf8(), | |
1987 "Invalid constant pool index %u in Signature attribute in class file %s", | |
1988 signature_index, CHECK); | |
1989 k->set_generic_signature(cp->symbol_at(signature_index)); | |
1990 } | |
1991 | |
1992 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
1993 ClassFileStream* cfs = stream(); | |
1994 // Set inner classes attribute to default sentinel | |
1995 k->set_inner_classes(Universe::the_empty_short_array()); | |
1996 cfs->guarantee_more(2, CHECK); // attributes_count | |
1997 u2 attributes_count = cfs->get_u2_fast(); | |
1998 bool parsed_sourcefile_attribute = false; | |
1999 bool parsed_innerclasses_attribute = false; | |
2000 bool parsed_enclosingmethod_attribute = false; | |
2001 u1* runtime_visible_annotations = NULL; | |
2002 int runtime_visible_annotations_length = 0; | |
2003 u1* runtime_invisible_annotations = NULL; | |
2004 int runtime_invisible_annotations_length = 0; | |
2005 // Iterate over attributes | |
2006 while (attributes_count--) { | |
2007 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
2008 u2 attribute_name_index = cfs->get_u2_fast(); | |
2009 u4 attribute_length = cfs->get_u4_fast(); | |
2010 check_property( | |
2011 valid_cp_range(attribute_name_index, cp->length()) && | |
2012 cp->tag_at(attribute_name_index).is_utf8(), | |
2013 "Attribute name has bad constant pool index %u in class file %s", | |
2014 attribute_name_index, CHECK); | |
2015 symbolOop tag = cp->symbol_at(attribute_name_index); | |
2016 if (tag == vmSymbols::tag_source_file()) { | |
2017 // Check for SourceFile tag | |
2018 if (_need_verify) { | |
2019 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
2020 } | |
2021 if (parsed_sourcefile_attribute) { | |
2022 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
2023 } else { | |
2024 parsed_sourcefile_attribute = true; | |
2025 } | |
2026 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
2027 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
2028 // Check for SourceDebugExtension tag | |
2029 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
2030 } else if (tag == vmSymbols::tag_inner_classes()) { | |
2031 // Check for InnerClasses tag | |
2032 if (parsed_innerclasses_attribute) { | |
2033 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
2034 } else { | |
2035 parsed_innerclasses_attribute = true; | |
2036 } | |
2037 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
2038 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
2039 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
2040 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
2041 } | |
2042 } else if (tag == vmSymbols::tag_synthetic()) { | |
2043 // Check for Synthetic tag | |
2044 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
2045 if (attribute_length != 0) { | |
2046 classfile_parse_error( | |
2047 "Invalid Synthetic classfile attribute length %u in class file %s", | |
2048 attribute_length, CHECK); | |
2049 } | |
2050 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
2051 } else if (tag == vmSymbols::tag_deprecated()) { | |
2052 // Check for Deprecatd tag - 4276120 | |
2053 if (attribute_length != 0) { | |
2054 classfile_parse_error( | |
2055 "Invalid Deprecated classfile attribute length %u in class file %s", | |
2056 attribute_length, CHECK); | |
2057 } | |
2058 } else if (_major_version >= JAVA_1_5_VERSION) { | |
2059 if (tag == vmSymbols::tag_signature()) { | |
2060 if (attribute_length != 2) { | |
2061 classfile_parse_error( | |
2062 "Wrong Signature attribute length %u in class file %s", | |
2063 attribute_length, CHECK); | |
2064 } | |
2065 parse_classfile_signature_attribute(cp, k, CHECK); | |
2066 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
2067 runtime_visible_annotations_length = attribute_length; | |
2068 runtime_visible_annotations = cfs->get_u1_buffer(); | |
2069 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
2070 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
2071 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
2072 runtime_invisible_annotations_length = attribute_length; | |
2073 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
2074 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
2075 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
2076 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
2077 if (parsed_enclosingmethod_attribute) { | |
2078 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
2079 } else { | |
2080 parsed_enclosingmethod_attribute = true; | |
2081 } | |
2082 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
2083 u2 class_index = cfs->get_u2_fast(); | |
2084 u2 method_index = cfs->get_u2_fast(); | |
2085 if (class_index == 0) { | |
2086 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
2087 } | |
2088 // Validate the constant pool indices and types | |
2089 if (!cp->is_within_bounds(class_index) || | |
2090 !cp->tag_at(class_index).is_klass_reference()) { | |
2091 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); | |
2092 } | |
2093 if (method_index != 0 && | |
2094 (!cp->is_within_bounds(method_index) || | |
2095 !cp->tag_at(method_index).is_name_and_type())) { | |
2096 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
2097 } | |
2098 k->set_enclosing_method_indices(class_index, method_index); | |
2099 } else { | |
2100 // Unknown attribute | |
2101 cfs->skip_u1(attribute_length, CHECK); | |
2102 } | |
2103 } else { | |
2104 // Unknown attribute | |
2105 cfs->skip_u1(attribute_length, CHECK); | |
2106 } | |
2107 } | |
2108 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
2109 runtime_visible_annotations_length, | |
2110 runtime_invisible_annotations, | |
2111 runtime_invisible_annotations_length, | |
2112 CHECK); | |
2113 k->set_class_annotations(annotations()); | |
2114 } | |
2115 | |
2116 | |
2117 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
2118 int runtime_visible_annotations_length, | |
2119 u1* runtime_invisible_annotations, | |
2120 int runtime_invisible_annotations_length, TRAPS) { | |
2121 typeArrayHandle annotations; | |
2122 if (runtime_visible_annotations != NULL || | |
2123 runtime_invisible_annotations != NULL) { | |
2124 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
2125 runtime_invisible_annotations_length, CHECK_(annotations)); | |
2126 annotations = typeArrayHandle(THREAD, anno); | |
2127 if (runtime_visible_annotations != NULL) { | |
2128 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
2129 } | |
2130 if (runtime_invisible_annotations != NULL) { | |
2131 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
2132 } | |
2133 } | |
2134 return annotations; | |
2135 } | |
2136 | |
2137 | |
2138 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
2139 KlassHandle h_k (THREAD, fd->field_holder()); | |
2140 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
2141 if (fd->has_initial_value()) { | |
2142 BasicType t = fd->field_type(); | |
2143 switch (t) { | |
2144 case T_BYTE: | |
2145 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
2146 break; | |
2147 case T_BOOLEAN: | |
2148 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
2149 break; | |
2150 case T_CHAR: | |
2151 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
2152 break; | |
2153 case T_SHORT: | |
2154 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
2155 break; | |
2156 case T_INT: | |
2157 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
2158 break; | |
2159 case T_FLOAT: | |
2160 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
2161 break; | |
2162 case T_DOUBLE: | |
2163 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
2164 break; | |
2165 case T_LONG: | |
2166 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
2167 break; | |
2168 case T_OBJECT: | |
2169 { | |
2170 #ifdef ASSERT | |
2171 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK); | |
2172 assert(fd->signature() == sym, "just checking"); | |
2173 #endif | |
2174 oop string = fd->string_initial_value(CHECK); | |
2175 h_k()->obj_field_put(fd->offset(), string); | |
2176 } | |
2177 break; | |
2178 default: | |
2179 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
2180 "Illegal ConstantValue attribute in class file"); | |
2181 } | |
2182 } | |
2183 } | |
2184 | |
2185 | |
2186 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
2187 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
2188 // This code is for compatibility with earlier jdk's that do not | |
2189 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
2190 // the check for the "discovered" field should issue a warning if | |
2191 // the field is not found. For 1.6 this code should be issue a | |
2192 // fatal error if the "discovered" field is not found. | |
2193 // | |
2194 // Increment fac.nonstatic_oop_count so that the start of the | |
2195 // next type of non-static oops leaves room for the fake oop. | |
2196 // Do not increment next_nonstatic_oop_offset so that the | |
2197 // fake oop is place after the java.lang.ref.Reference oop | |
2198 // fields. | |
2199 // | |
2200 // Check the fields in java.lang.ref.Reference for the "discovered" | |
2201 // field. If it is not present, artifically create a field for it. | |
2202 // This allows this VM to run on early JDK where the field is not | |
2203 // present. | |
2204 | |
2205 // | |
2206 // Increment fac.nonstatic_oop_count so that the start of the | |
2207 // next type of non-static oops leaves room for the fake oop. | |
2208 // Do not increment next_nonstatic_oop_offset so that the | |
2209 // fake oop is place after the java.lang.ref.Reference oop | |
2210 // fields. | |
2211 // | |
2212 // Check the fields in java.lang.ref.Reference for the "discovered" | |
2213 // field. If it is not present, artifically create a field for it. | |
2214 // This allows this VM to run on early JDK where the field is not | |
2215 // present. | |
2216 int reference_sig_index = 0; | |
2217 int reference_name_index = 0; | |
2218 int reference_index = 0; | |
2219 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
2220 const int n = (*fields_ptr)()->length(); | |
2221 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
2222 int name_index = | |
2223 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
2224 int sig_index = | |
2225 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
2226 symbolOop f_name = cp->symbol_at(name_index); | |
2227 symbolOop f_sig = cp->symbol_at(sig_index); | |
2228 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { | |
2229 // Save the index for reference signature for later use. | |
2230 // The fake discovered field does not entries in the | |
2231 // constant pool so the index for its signature cannot | |
2232 // be extracted from the constant pool. It will need | |
2233 // later, however. It's signature is vmSymbols::reference_signature() | |
2234 // so same an index for that signature. | |
2235 reference_sig_index = sig_index; | |
2236 reference_name_index = name_index; | |
2237 reference_index = i; | |
2238 } | |
2239 if (f_name == vmSymbols::reference_discovered_name() && | |
2240 f_sig == vmSymbols::reference_signature()) { | |
2241 // The values below are fake but will force extra | |
2242 // non-static oop fields and a corresponding non-static | |
2243 // oop map block to be allocated. | |
2244 extra = 0; | |
2245 break; | |
2246 } | |
2247 } | |
2248 if (extra != 0) { | |
2249 fac_ptr->nonstatic_oop_count += extra; | |
2250 // Add the additional entry to "fields" so that the klass | |
2251 // contains the "discoverd" field and the field will be initialized | |
2252 // in instances of the object. | |
2253 int fields_with_fix_length = (*fields_ptr)()->length() + | |
2254 instanceKlass::next_offset; | |
2255 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
2256 fields_with_fix_length, CHECK); | |
2257 typeArrayHandle fields_with_fix(THREAD, ff); | |
2258 | |
2259 // Take everything from the original but the length. | |
2260 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
2261 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
2262 } | |
2263 | |
2264 // Add the fake field at the end. | |
2265 int i = (*fields_ptr)->length(); | |
2266 // There is no name index for the fake "discovered" field nor | |
2267 // signature but a signature is needed so that the field will | |
2268 // be properly initialized. Use one found for | |
2269 // one of the other reference fields. Be sure the index for the | |
2270 // name is 0. In fieldDescriptor::initialize() the index of the | |
2271 // name is checked. That check is by passed for the last nonstatic | |
2272 // oop field in a java.lang.ref.Reference which is assumed to be | |
2273 // this artificial "discovered" field. An assertion checks that | |
2274 // the name index is 0. | |
2275 assert(reference_index != 0, "Missing signature for reference"); | |
2276 | |
2277 int j; | |
2278 for (j = 0; j < instanceKlass::next_offset; j++) { | |
2279 fields_with_fix->ushort_at_put(i + j, | |
2280 (*fields_ptr)->ushort_at(reference_index +j)); | |
2281 } | |
2282 // Clear the public access flag and set the private access flag. | |
2283 short flags; | |
2284 flags = | |
2285 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
2286 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
2287 flags = flags & (~JVM_ACC_PUBLIC); | |
2288 flags = flags | JVM_ACC_PRIVATE; | |
2289 AccessFlags access_flags; | |
2290 access_flags.set_flags(flags); | |
2291 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
2292 assert(access_flags.is_private(), "Failed to set private flag"); | |
2293 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
2294 flags); | |
2295 | |
2296 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
2297 == reference_name_index, "The fake reference name is incorrect"); | |
2298 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
2299 == reference_sig_index, "The fake reference signature is incorrect"); | |
2300 // The type of the field is stored in the low_offset entry during | |
2301 // parsing. | |
2302 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
2303 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
2304 | |
2305 // "fields" is allocated in the permanent generation. Disgard | |
2306 // it and let it be collected. | |
2307 (*fields_ptr) = fields_with_fix; | |
2308 } | |
2309 return; | |
2310 } | |
2311 | |
2312 | |
2313 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
2314 FieldAllocationCount *fac_ptr, TRAPS) { | |
2315 // Add fake fields for java.lang.Class instances | |
2316 // | |
2317 // This is not particularly nice. We should consider adding a | |
2318 // private transient object field at the Java level to | |
2319 // java.lang.Class. Alternatively we could add a subclass of | |
2320 // instanceKlass which provides an accessor and size computer for | |
2321 // this field, but that appears to be more code than this hack. | |
2322 // | |
2323 // NOTE that we wedge these in at the beginning rather than the | |
2324 // end of the object because the Class layout changed between JDK | |
2325 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
2326 // nonstatic oop fields were added at the Java level. The offsets | |
2327 // of these fake fields can't change between these two JDK | |
2328 // versions because when the offsets are computed at bootstrap | |
2329 // time we don't know yet which version of the JDK we're running in. | |
2330 | |
2331 // The values below are fake but will force two non-static oop fields and | |
2332 // a corresponding non-static oop map block to be allocated. | |
2333 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
2334 fac_ptr->nonstatic_oop_count += extra; | |
2335 } | |
2336 | |
2337 | |
2338 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
2339 // Cause the extra fake fields in java.lang.Class to show up before | |
2340 // the Java fields for layout compatibility between 1.3 and 1.4 | |
2341 // Incrementing next_nonstatic_oop_offset here advances the | |
2342 // location where the real java fields are placed. | |
2343 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
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2344 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
0 | 2345 } |
2346 | |
2347 | |
2348 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name, | |
2349 Handle class_loader, | |
2350 Handle protection_domain, | |
2351 symbolHandle& parsed_name, | |
2352 TRAPS) { | |
2353 // So that JVMTI can cache class file in the state before retransformable agents | |
2354 // have modified it | |
2355 unsigned char *cached_class_file_bytes = NULL; | |
2356 jint cached_class_file_length; | |
2357 | |
2358 ClassFileStream* cfs = stream(); | |
2359 // Timing | |
2360 PerfTraceTime vmtimer(ClassLoader::perf_accumulated_time()); | |
2361 | |
2362 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
2363 | |
2364 if (JvmtiExport::should_post_class_file_load_hook()) { | |
2365 unsigned char* ptr = cfs->buffer(); | |
2366 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
2367 | |
2368 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
2369 &ptr, &end_ptr, | |
2370 &cached_class_file_bytes, | |
2371 &cached_class_file_length); | |
2372 | |
2373 if (ptr != cfs->buffer()) { | |
2374 // JVMTI agent has modified class file data. | |
2375 // Set new class file stream using JVMTI agent modified | |
2376 // class file data. | |
2377 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
2378 set_stream(cfs); | |
2379 } | |
2380 } | |
2381 | |
2382 | |
2383 instanceKlassHandle nullHandle; | |
2384 | |
2385 // Figure out whether we can skip format checking (matching classic VM behavior) | |
2386 _need_verify = Verifier::should_verify_for(class_loader()); | |
2387 | |
2388 // Set the verify flag in stream | |
2389 cfs->set_verify(_need_verify); | |
2390 | |
2391 // Save the class file name for easier error message printing. | |
2392 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name(); | |
2393 | |
2394 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
2395 // Magic value | |
2396 u4 magic = cfs->get_u4_fast(); | |
2397 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
2398 "Incompatible magic value %u in class file %s", | |
2399 magic, CHECK_(nullHandle)); | |
2400 | |
2401 // Version numbers | |
2402 u2 minor_version = cfs->get_u2_fast(); | |
2403 u2 major_version = cfs->get_u2_fast(); | |
2404 | |
2405 // Check version numbers - we check this even with verifier off | |
2406 if (!is_supported_version(major_version, minor_version)) { | |
2407 if (name.is_null()) { | |
2408 Exceptions::fthrow( | |
2409 THREAD_AND_LOCATION, | |
2410 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
2411 "Unsupported major.minor version %u.%u", | |
2412 major_version, | |
2413 minor_version); | |
2414 } else { | |
2415 ResourceMark rm(THREAD); | |
2416 Exceptions::fthrow( | |
2417 THREAD_AND_LOCATION, | |
2418 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
2419 "%s : Unsupported major.minor version %u.%u", | |
2420 name->as_C_string(), | |
2421 major_version, | |
2422 minor_version); | |
2423 } | |
2424 return nullHandle; | |
2425 } | |
2426 | |
2427 _major_version = major_version; | |
2428 _minor_version = minor_version; | |
2429 | |
2430 | |
2431 // Check if verification needs to be relaxed for this class file | |
2432 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
2433 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
2434 | |
2435 // Constant pool | |
2436 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
2437 int cp_size = cp->length(); | |
2438 | |
2439 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
2440 | |
2441 // Access flags | |
2442 AccessFlags access_flags; | |
2443 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
2444 | |
2445 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
2446 // Set abstract bit for old class files for backward compatibility | |
2447 flags |= JVM_ACC_ABSTRACT; | |
2448 } | |
2449 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
2450 access_flags.set_flags(flags); | |
2451 | |
2452 // This class and superclass | |
2453 instanceKlassHandle super_klass; | |
2454 u2 this_class_index = cfs->get_u2_fast(); | |
2455 check_property( | |
2456 valid_cp_range(this_class_index, cp_size) && | |
2457 cp->tag_at(this_class_index).is_unresolved_klass(), | |
2458 "Invalid this class index %u in constant pool in class file %s", | |
2459 this_class_index, CHECK_(nullHandle)); | |
2460 | |
2461 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index)); | |
2462 assert(class_name.not_null(), "class_name can't be null"); | |
2463 | |
2464 // It's important to set parsed_name *before* resolving the super class. | |
2465 // (it's used for cleanup by the caller if parsing fails) | |
2466 parsed_name = class_name; | |
2467 | |
2468 // Update _class_name which could be null previously to be class_name | |
2469 _class_name = class_name; | |
2470 | |
2471 // Don't need to check whether this class name is legal or not. | |
2472 // It has been checked when constant pool is parsed. | |
2473 // However, make sure it is not an array type. | |
2474 if (_need_verify) { | |
2475 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
2476 "Bad class name in class file %s", | |
2477 CHECK_(nullHandle)); | |
2478 } | |
2479 | |
2480 klassOop preserve_this_klass; // for storing result across HandleMark | |
2481 | |
2482 // release all handles when parsing is done | |
2483 { HandleMark hm(THREAD); | |
2484 | |
2485 // Checks if name in class file matches requested name | |
2486 if (name.not_null() && class_name() != name()) { | |
2487 ResourceMark rm(THREAD); | |
2488 Exceptions::fthrow( | |
2489 THREAD_AND_LOCATION, | |
2490 vmSymbolHandles::java_lang_NoClassDefFoundError(), | |
2491 "%s (wrong name: %s)", | |
2492 name->as_C_string(), | |
2493 class_name->as_C_string() | |
2494 ); | |
2495 return nullHandle; | |
2496 } | |
2497 | |
2498 if (TraceClassLoadingPreorder) { | |
2499 tty->print("[Loading %s", name()->as_klass_external_name()); | |
2500 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); | |
2501 tty->print_cr("]"); | |
2502 } | |
2503 | |
2504 u2 super_class_index = cfs->get_u2_fast(); | |
2505 if (super_class_index == 0) { | |
2506 check_property(class_name() == vmSymbols::java_lang_Object(), | |
2507 "Invalid superclass index %u in class file %s", | |
2508 super_class_index, | |
2509 CHECK_(nullHandle)); | |
2510 } else { | |
2511 check_property(valid_cp_range(super_class_index, cp_size) && | |
2512 cp->tag_at(super_class_index).is_unresolved_klass(), | |
2513 "Invalid superclass index %u in class file %s", | |
2514 super_class_index, | |
2515 CHECK_(nullHandle)); | |
2516 // The class name should be legal because it is checked when parsing constant pool. | |
2517 // However, make sure it is not an array type. | |
2518 if (_need_verify) { | |
2519 guarantee_property(cp->unresolved_klass_at(super_class_index)->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
2520 "Bad superclass name in class file %s", CHECK_(nullHandle)); | |
2521 } | |
2522 } | |
2523 | |
2524 // Interfaces | |
2525 u2 itfs_len = cfs->get_u2_fast(); | |
2526 objArrayHandle local_interfaces; | |
2527 if (itfs_len == 0) { | |
2528 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
2529 } else { | |
2530 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, &vmtimer, _class_name, CHECK_(nullHandle)); | |
2531 } | |
2532 | |
2533 // Fields (offsets are filled in later) | |
2534 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
2535 objArrayHandle fields_annotations; | |
2536 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
2537 // Methods | |
2538 bool has_final_method = false; | |
2539 AccessFlags promoted_flags; | |
2540 promoted_flags.set_flags(0); | |
2541 // These need to be oop pointers because they are allocated lazily | |
2542 // inside parse_methods inside a nested HandleMark | |
2543 objArrayOop methods_annotations_oop = NULL; | |
2544 objArrayOop methods_parameter_annotations_oop = NULL; | |
2545 objArrayOop methods_default_annotations_oop = NULL; | |
2546 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
2547 &promoted_flags, | |
2548 &has_final_method, | |
2549 &methods_annotations_oop, | |
2550 &methods_parameter_annotations_oop, | |
2551 &methods_default_annotations_oop, | |
2552 CHECK_(nullHandle)); | |
2553 | |
2554 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
2555 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
2556 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
2557 | |
2558 // We check super class after class file is parsed and format is checked | |
2559 if (super_class_index > 0) { | |
2560 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index)); | |
2561 if (access_flags.is_interface()) { | |
2562 // Before attempting to resolve the superclass, check for class format | |
2563 // errors not checked yet. | |
2564 guarantee_property(sk() == vmSymbols::java_lang_Object(), | |
2565 "Interfaces must have java.lang.Object as superclass in class file %s", | |
2566 CHECK_(nullHandle)); | |
2567 } | |
2568 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
2569 sk, | |
2570 class_loader, | |
2571 protection_domain, | |
2572 true, | |
2573 CHECK_(nullHandle)); | |
2574 KlassHandle kh (THREAD, k); | |
2575 super_klass = instanceKlassHandle(THREAD, kh()); | |
2576 if (super_klass->is_interface()) { | |
2577 ResourceMark rm(THREAD); | |
2578 Exceptions::fthrow( | |
2579 THREAD_AND_LOCATION, | |
2580 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), | |
2581 "class %s has interface %s as super class", | |
2582 class_name->as_klass_external_name(), | |
2583 super_klass->external_name() | |
2584 ); | |
2585 return nullHandle; | |
2586 } | |
2587 // Make sure super class is not final | |
2588 if (super_klass->is_final()) { | |
2589 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
2590 } | |
2591 } | |
2592 | |
2593 // Compute the transitive list of all unique interfaces implemented by this class | |
2594 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
2595 | |
2596 // sort methods | |
2597 typeArrayHandle method_ordering = sort_methods(methods, | |
2598 methods_annotations, | |
2599 methods_parameter_annotations, | |
2600 methods_default_annotations, | |
2601 CHECK_(nullHandle)); | |
2602 | |
2603 // promote flags from parse_methods() to the klass' flags | |
2604 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
2605 | |
2606 // Size of Java vtable (in words) | |
2607 int vtable_size = 0; | |
2608 int itable_size = 0; | |
2609 int num_miranda_methods = 0; | |
2610 | |
2611 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
2612 num_miranda_methods, | |
2613 super_klass(), | |
2614 methods(), | |
2615 access_flags, | |
2616 class_loader(), | |
2617 class_name(), | |
2618 local_interfaces()); | |
2619 | |
2620 // Size of Java itable (in words) | |
2621 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
2622 | |
2623 // Field size and offset computation | |
2624 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
2625 #ifndef PRODUCT | |
2626 int orig_nonstatic_field_size = 0; | |
2627 #endif | |
2628 int static_field_size = 0; | |
2629 int next_static_oop_offset; | |
2630 int next_static_double_offset; | |
2631 int next_static_word_offset; | |
2632 int next_static_short_offset; | |
2633 int next_static_byte_offset; | |
2634 int next_static_type_offset; | |
2635 int next_nonstatic_oop_offset; | |
2636 int next_nonstatic_double_offset; | |
2637 int next_nonstatic_word_offset; | |
2638 int next_nonstatic_short_offset; | |
2639 int next_nonstatic_byte_offset; | |
2640 int next_nonstatic_type_offset; | |
2641 int first_nonstatic_oop_offset; | |
2642 int first_nonstatic_field_offset; | |
2643 int next_nonstatic_field_offset; | |
2644 | |
2645 // Calculate the starting byte offsets | |
2646 next_static_oop_offset = (instanceKlass::header_size() + | |
2647 align_object_offset(vtable_size) + | |
2648 align_object_offset(itable_size)) * wordSize; | |
2649 next_static_double_offset = next_static_oop_offset + | |
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2650 (fac.static_oop_count * heapOopSize); |
0 | 2651 if ( fac.static_double_count && |
2652 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
2653 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
2654 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
2655 } | |
2656 | |
2657 next_static_word_offset = next_static_double_offset + | |
2658 (fac.static_double_count * BytesPerLong); | |
2659 next_static_short_offset = next_static_word_offset + | |
2660 (fac.static_word_count * BytesPerInt); | |
2661 next_static_byte_offset = next_static_short_offset + | |
2662 (fac.static_short_count * BytesPerShort); | |
2663 next_static_type_offset = align_size_up((next_static_byte_offset + | |
2664 fac.static_byte_count ), wordSize ); | |
2665 static_field_size = (next_static_type_offset - | |
2666 next_static_oop_offset) / wordSize; | |
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2667 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + |
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2668 nonstatic_field_size * heapOopSize; |
0 | 2669 next_nonstatic_field_offset = first_nonstatic_field_offset; |
2670 | |
2671 // Add fake fields for java.lang.Class instances (also see below) | |
2672 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
2673 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); | |
2674 } | |
2675 | |
2676 // Add a fake "discovered" field if it is not present | |
2677 // for compatibility with earlier jdk's. | |
2678 if (class_name() == vmSymbols::java_lang_ref_Reference() | |
2679 && class_loader.is_null()) { | |
2680 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
2681 } | |
2682 // end of "discovered" field compactibility fix | |
2683 | |
2684 int nonstatic_double_count = fac.nonstatic_double_count; | |
2685 int nonstatic_word_count = fac.nonstatic_word_count; | |
2686 int nonstatic_short_count = fac.nonstatic_short_count; | |
2687 int nonstatic_byte_count = fac.nonstatic_byte_count; | |
2688 int nonstatic_oop_count = fac.nonstatic_oop_count; | |
2689 | |
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2690 bool super_has_nonstatic_fields = |
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2691 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
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2692 bool has_nonstatic_fields = super_has_nonstatic_fields || |
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2693 ((nonstatic_double_count + nonstatic_word_count + |
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2694 nonstatic_short_count + nonstatic_byte_count + |
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2695 nonstatic_oop_count) != 0); |
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2696 |
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2697 |
0 | 2698 // Prepare list of oops for oop maps generation. |
2699 u2* nonstatic_oop_offsets; | |
2700 u2* nonstatic_oop_length; | |
2701 int nonstatic_oop_map_count = 0; | |
2702 | |
2703 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
2704 THREAD, u2, nonstatic_oop_count+1); | |
2705 nonstatic_oop_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
2706 THREAD, u2, nonstatic_oop_count+1); | |
2707 | |
2708 // Add fake fields for java.lang.Class instances (also see above). | |
2709 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
2710 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
2711 java_lang_Class_fix_post(&next_nonstatic_field_offset); | |
2712 nonstatic_oop_offsets[0] = (u2)first_nonstatic_field_offset; | |
2713 int fake_oop_count = (( next_nonstatic_field_offset - | |
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2714 first_nonstatic_field_offset ) / heapOopSize); |
0 | 2715 nonstatic_oop_length [0] = (u2)fake_oop_count; |
2716 nonstatic_oop_map_count = 1; | |
2717 nonstatic_oop_count -= fake_oop_count; | |
2718 first_nonstatic_oop_offset = first_nonstatic_field_offset; | |
2719 } else { | |
2720 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
2721 } | |
2722 | |
2723 #ifndef PRODUCT | |
2724 if( PrintCompactFieldsSavings ) { | |
2725 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
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2726 (nonstatic_oop_count * heapOopSize); |
0 | 2727 if ( nonstatic_double_count > 0 ) { |
2728 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
2729 } | |
2730 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
2731 (nonstatic_double_count * BytesPerLong); | |
2732 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
2733 (nonstatic_word_count * BytesPerInt); | |
2734 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
2735 (nonstatic_short_count * BytesPerShort); | |
2736 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
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2737 nonstatic_byte_count ), heapOopSize ); |
0 | 2738 orig_nonstatic_field_size = nonstatic_field_size + |
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2739 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); |
0 | 2740 } |
2741 #endif | |
2742 bool compact_fields = CompactFields; | |
2743 int allocation_style = FieldsAllocationStyle; | |
2744 if( allocation_style < 0 || allocation_style > 1 ) { // Out of range? | |
2745 assert(false, "0 <= FieldsAllocationStyle <= 1"); | |
2746 allocation_style = 1; // Optimistic | |
2747 } | |
2748 | |
2749 // The next classes have predefined hard-coded fields offsets | |
2750 // (see in JavaClasses::compute_hard_coded_offsets()). | |
2751 // Use default fields allocation order for them. | |
2752 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
2753 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() || | |
2754 class_name() == vmSymbols::java_lang_Class() || | |
2755 class_name() == vmSymbols::java_lang_ClassLoader() || | |
2756 class_name() == vmSymbols::java_lang_ref_Reference() || | |
2757 class_name() == vmSymbols::java_lang_ref_SoftReference() || | |
2758 class_name() == vmSymbols::java_lang_StackTraceElement() || | |
2759 class_name() == vmSymbols::java_lang_String() || | |
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2760 class_name() == vmSymbols::java_lang_Throwable() || |
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2761 class_name() == vmSymbols::java_lang_Boolean() || |
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2762 class_name() == vmSymbols::java_lang_Character() || |
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2763 class_name() == vmSymbols::java_lang_Float() || |
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2764 class_name() == vmSymbols::java_lang_Double() || |
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2765 class_name() == vmSymbols::java_lang_Byte() || |
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2766 class_name() == vmSymbols::java_lang_Short() || |
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2767 class_name() == vmSymbols::java_lang_Integer() || |
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2768 class_name() == vmSymbols::java_lang_Long())) { |
0 | 2769 allocation_style = 0; // Allocate oops first |
2770 compact_fields = false; // Don't compact fields | |
2771 } | |
2772 | |
2773 if( allocation_style == 0 ) { | |
2774 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
2775 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
2776 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
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2777 (nonstatic_oop_count * heapOopSize); |
0 | 2778 } else if( allocation_style == 1 ) { |
2779 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
2780 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
2781 } else { | |
2782 ShouldNotReachHere(); | |
2783 } | |
2784 | |
2785 int nonstatic_oop_space_count = 0; | |
2786 int nonstatic_word_space_count = 0; | |
2787 int nonstatic_short_space_count = 0; | |
2788 int nonstatic_byte_space_count = 0; | |
2789 int nonstatic_oop_space_offset; | |
2790 int nonstatic_word_space_offset; | |
2791 int nonstatic_short_space_offset; | |
2792 int nonstatic_byte_space_offset; | |
2793 | |
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2794 if( nonstatic_double_count > 0 ) { |
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2795 int offset = next_nonstatic_double_offset; |
0 | 2796 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
2797 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
2798 // Allocate available fields into the gap before double field. | |
2799 int length = next_nonstatic_double_offset - offset; | |
2800 assert(length == BytesPerInt, ""); | |
2801 nonstatic_word_space_offset = offset; | |
2802 if( nonstatic_word_count > 0 ) { | |
2803 nonstatic_word_count -= 1; | |
2804 nonstatic_word_space_count = 1; // Only one will fit | |
2805 length -= BytesPerInt; | |
2806 offset += BytesPerInt; | |
2807 } | |
2808 nonstatic_short_space_offset = offset; | |
2809 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
2810 nonstatic_short_count -= 1; | |
2811 nonstatic_short_space_count += 1; | |
2812 length -= BytesPerShort; | |
2813 offset += BytesPerShort; | |
2814 } | |
2815 nonstatic_byte_space_offset = offset; | |
2816 while( length > 0 && nonstatic_byte_count > 0 ) { | |
2817 nonstatic_byte_count -= 1; | |
2818 nonstatic_byte_space_count += 1; | |
2819 length -= 1; | |
2820 } | |
2821 // Allocate oop field in the gap if there are no other fields for that. | |
2822 nonstatic_oop_space_offset = offset; | |
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2823 if( length >= heapOopSize && nonstatic_oop_count > 0 && |
0 | 2824 allocation_style != 0 ) { // when oop fields not first |
2825 nonstatic_oop_count -= 1; | |
2826 nonstatic_oop_space_count = 1; // Only one will fit | |
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2827 length -= heapOopSize; |
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2828 offset += heapOopSize; |
0 | 2829 } |
2830 } | |
2831 } | |
2832 | |
2833 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
2834 (nonstatic_double_count * BytesPerLong); | |
2835 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
2836 (nonstatic_word_count * BytesPerInt); | |
2837 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
2838 (nonstatic_short_count * BytesPerShort); | |
2839 | |
2840 int notaligned_offset; | |
2841 if( allocation_style == 0 ) { | |
2842 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
2843 } else { // allocation_style == 1 | |
2844 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
2845 if( nonstatic_oop_count > 0 ) { | |
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2846 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
0 | 2847 } |
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2848 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
0 | 2849 } |
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2850 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); |
0 | 2851 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset |
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2852 - first_nonstatic_field_offset)/heapOopSize); |
0 | 2853 |
2854 // Iterate over fields again and compute correct offsets. | |
2855 // The field allocation type was temporarily stored in the offset slot. | |
2856 // oop fields are located before non-oop fields (static and non-static). | |
2857 int len = fields->length(); | |
2858 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
2859 int real_offset; | |
2860 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i+4); | |
2861 switch (atype) { | |
2862 case STATIC_OOP: | |
2863 real_offset = next_static_oop_offset; | |
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2864 next_static_oop_offset += heapOopSize; |
0 | 2865 break; |
2866 case STATIC_BYTE: | |
2867 real_offset = next_static_byte_offset; | |
2868 next_static_byte_offset += 1; | |
2869 break; | |
2870 case STATIC_SHORT: | |
2871 real_offset = next_static_short_offset; | |
2872 next_static_short_offset += BytesPerShort; | |
2873 break; | |
2874 case STATIC_WORD: | |
2875 real_offset = next_static_word_offset; | |
2876 next_static_word_offset += BytesPerInt; | |
2877 break; | |
2878 case STATIC_ALIGNED_DOUBLE: | |
2879 case STATIC_DOUBLE: | |
2880 real_offset = next_static_double_offset; | |
2881 next_static_double_offset += BytesPerLong; | |
2882 break; | |
2883 case NONSTATIC_OOP: | |
2884 if( nonstatic_oop_space_count > 0 ) { | |
2885 real_offset = nonstatic_oop_space_offset; | |
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2886 nonstatic_oop_space_offset += heapOopSize; |
0 | 2887 nonstatic_oop_space_count -= 1; |
2888 } else { | |
2889 real_offset = next_nonstatic_oop_offset; | |
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2890 next_nonstatic_oop_offset += heapOopSize; |
0 | 2891 } |
2892 // Update oop maps | |
2893 if( nonstatic_oop_map_count > 0 && | |
2894 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
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2895 (u2)(real_offset - nonstatic_oop_length[nonstatic_oop_map_count - 1] * heapOopSize) ) { |
0 | 2896 // Extend current oop map |
2897 nonstatic_oop_length[nonstatic_oop_map_count - 1] += 1; | |
2898 } else { | |
2899 // Create new oop map | |
2900 nonstatic_oop_offsets[nonstatic_oop_map_count] = (u2)real_offset; | |
2901 nonstatic_oop_length [nonstatic_oop_map_count] = 1; | |
2902 nonstatic_oop_map_count += 1; | |
2903 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
2904 first_nonstatic_oop_offset = real_offset; | |
2905 } | |
2906 } | |
2907 break; | |
2908 case NONSTATIC_BYTE: | |
2909 if( nonstatic_byte_space_count > 0 ) { | |
2910 real_offset = nonstatic_byte_space_offset; | |
2911 nonstatic_byte_space_offset += 1; | |
2912 nonstatic_byte_space_count -= 1; | |
2913 } else { | |
2914 real_offset = next_nonstatic_byte_offset; | |
2915 next_nonstatic_byte_offset += 1; | |
2916 } | |
2917 break; | |
2918 case NONSTATIC_SHORT: | |
2919 if( nonstatic_short_space_count > 0 ) { | |
2920 real_offset = nonstatic_short_space_offset; | |
2921 nonstatic_short_space_offset += BytesPerShort; | |
2922 nonstatic_short_space_count -= 1; | |
2923 } else { | |
2924 real_offset = next_nonstatic_short_offset; | |
2925 next_nonstatic_short_offset += BytesPerShort; | |
2926 } | |
2927 break; | |
2928 case NONSTATIC_WORD: | |
2929 if( nonstatic_word_space_count > 0 ) { | |
2930 real_offset = nonstatic_word_space_offset; | |
2931 nonstatic_word_space_offset += BytesPerInt; | |
2932 nonstatic_word_space_count -= 1; | |
2933 } else { | |
2934 real_offset = next_nonstatic_word_offset; | |
2935 next_nonstatic_word_offset += BytesPerInt; | |
2936 } | |
2937 break; | |
2938 case NONSTATIC_ALIGNED_DOUBLE: | |
2939 case NONSTATIC_DOUBLE: | |
2940 real_offset = next_nonstatic_double_offset; | |
2941 next_nonstatic_double_offset += BytesPerLong; | |
2942 break; | |
2943 default: | |
2944 ShouldNotReachHere(); | |
2945 } | |
2946 fields->short_at_put(i+4, extract_low_short_from_int(real_offset) ); | |
2947 fields->short_at_put(i+5, extract_high_short_from_int(real_offset) ); | |
2948 } | |
2949 | |
2950 // Size of instances | |
2951 int instance_size; | |
2952 | |
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2953 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); |
0 | 2954 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); |
2955 | |
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2956 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value"); |
0 | 2957 |
2958 // Size of non-static oop map blocks (in words) allocated at end of klass | |
2959 int nonstatic_oop_map_size = compute_oop_map_size(super_klass, nonstatic_oop_map_count, first_nonstatic_oop_offset); | |
2960 | |
2961 // Compute reference type | |
2962 ReferenceType rt; | |
2963 if (super_klass() == NULL) { | |
2964 rt = REF_NONE; | |
2965 } else { | |
2966 rt = super_klass->reference_type(); | |
2967 } | |
2968 | |
2969 // We can now create the basic klassOop for this klass | |
2970 klassOop ik = oopFactory::new_instanceKlass( | |
2971 vtable_size, itable_size, | |
2972 static_field_size, nonstatic_oop_map_size, | |
2973 rt, CHECK_(nullHandle)); | |
2974 instanceKlassHandle this_klass (THREAD, ik); | |
2975 | |
2976 assert(this_klass->static_field_size() == static_field_size && | |
2977 this_klass->nonstatic_oop_map_size() == nonstatic_oop_map_size, "sanity check"); | |
2978 | |
2979 // Fill in information already parsed | |
2980 this_klass->set_access_flags(access_flags); | |
2981 jint lh = Klass::instance_layout_helper(instance_size, false); | |
2982 this_klass->set_layout_helper(lh); | |
2983 assert(this_klass->oop_is_instance(), "layout is correct"); | |
2984 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
2985 // Not yet: supers are done below to support the new subtype-checking fields | |
2986 //this_klass->set_super(super_klass()); | |
2987 this_klass->set_class_loader(class_loader()); | |
2988 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
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2989 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
0 | 2990 this_klass->set_static_oop_field_size(fac.static_oop_count); |
2991 cp->set_pool_holder(this_klass()); | |
2992 this_klass->set_constants(cp()); | |
2993 this_klass->set_local_interfaces(local_interfaces()); | |
2994 this_klass->set_fields(fields()); | |
2995 this_klass->set_methods(methods()); | |
2996 if (has_final_method) { | |
2997 this_klass->set_has_final_method(); | |
2998 } | |
2999 this_klass->set_method_ordering(method_ordering()); | |
3000 this_klass->set_initial_method_idnum(methods->length()); | |
3001 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
3002 this_klass->set_protection_domain(protection_domain()); | |
3003 this_klass->set_fields_annotations(fields_annotations()); | |
3004 this_klass->set_methods_annotations(methods_annotations()); | |
3005 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
3006 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
3007 | |
3008 this_klass->set_minor_version(minor_version); | |
3009 this_klass->set_major_version(major_version); | |
3010 | |
3011 if (cached_class_file_bytes != NULL) { | |
3012 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
3013 this_klass->set_cached_class_file(cached_class_file_bytes, | |
3014 cached_class_file_length); | |
3015 } | |
3016 | |
3017 // Miranda methods | |
3018 if ((num_miranda_methods > 0) || | |
3019 // if this class introduced new miranda methods or | |
3020 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
3021 // super class exists and this class inherited miranda methods | |
3022 ) { | |
3023 this_klass->set_has_miranda_methods(); // then set a flag | |
3024 } | |
3025 | |
3026 // Additional attributes | |
3027 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
3028 | |
3029 // Make sure this is the end of class file stream | |
3030 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
3031 | |
3032 // Initialize static fields | |
3033 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
3034 | |
3035 // VerifyOops believes that once this has been set, the object is completely loaded. | |
3036 // Compute transitive closure of interfaces this class implements | |
3037 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
3038 | |
3039 // Fill in information needed to compute superclasses. | |
3040 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
3041 | |
3042 // Initialize itable offset tables | |
3043 klassItable::setup_itable_offset_table(this_klass); | |
3044 | |
3045 // Do final class setup | |
3046 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_length); | |
3047 | |
3048 set_precomputed_flags(this_klass); | |
3049 | |
3050 // reinitialize modifiers, using the InnerClasses attribute | |
3051 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
3052 this_klass->set_modifier_flags(computed_modifiers); | |
3053 | |
3054 // check if this class can access its super class | |
3055 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
3056 | |
3057 // check if this class can access its superinterfaces | |
3058 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
3059 | |
3060 // check if this class overrides any final method | |
3061 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
3062 | |
3063 // check that if this class is an interface then it doesn't have static methods | |
3064 if (this_klass->is_interface()) { | |
3065 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
3066 } | |
3067 | |
3068 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
3069 false /* not shared class */); | |
3070 | |
3071 if (TraceClassLoading) { | |
3072 // print in a single call to reduce interleaving of output | |
3073 if (cfs->source() != NULL) { | |
3074 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
3075 cfs->source()); | |
3076 } else if (class_loader.is_null()) { | |
3077 if (THREAD->is_Java_thread()) { | |
3078 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
3079 tty->print("[Loaded %s by instance of %s]\n", | |
3080 this_klass->external_name(), | |
3081 instanceKlass::cast(caller)->external_name()); | |
3082 } else { | |
3083 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
3084 } | |
3085 } else { | |
3086 ResourceMark rm; | |
3087 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
3088 instanceKlass::cast(class_loader->klass())->external_name()); | |
3089 } | |
3090 } | |
3091 | |
3092 if (TraceClassResolution) { | |
3093 // print out the superclass. | |
3094 const char * from = Klass::cast(this_klass())->external_name(); | |
3095 if (this_klass->java_super() != NULL) { | |
3096 tty->print("RESOLVE %s %s\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); | |
3097 } | |
3098 // print out each of the interface classes referred to by this class. | |
3099 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
3100 if (!local_interfaces.is_null()) { | |
3101 int length = local_interfaces->length(); | |
3102 for (int i = 0; i < length; i++) { | |
3103 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
3104 instanceKlass* to_class = instanceKlass::cast(k); | |
3105 const char * to = to_class->external_name(); | |
3106 tty->print("RESOLVE %s %s\n", from, to); | |
3107 } | |
3108 } | |
3109 } | |
3110 | |
3111 #ifndef PRODUCT | |
3112 if( PrintCompactFieldsSavings ) { | |
3113 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
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3114 tty->print("[Saved %d of %d bytes in %s]\n", |
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3115 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize, |
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3116 orig_nonstatic_field_size*heapOopSize, |
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3117 this_klass->external_name()); |
0 | 3118 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { |
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3119 tty->print("[Wasted %d over %d bytes in %s]\n", |
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3120 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize, |
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3121 orig_nonstatic_field_size*heapOopSize, |
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3122 this_klass->external_name()); |
0 | 3123 } |
3124 } | |
3125 #endif | |
3126 | |
3127 // preserve result across HandleMark | |
3128 preserve_this_klass = this_klass(); | |
3129 } | |
3130 | |
3131 // Create new handle outside HandleMark | |
3132 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
3133 debug_only(this_klass->as_klassOop()->verify();) | |
3134 | |
3135 return this_klass; | |
3136 } | |
3137 | |
3138 | |
3139 int ClassFileParser::compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_map_count, int first_nonstatic_oop_offset) { | |
3140 int map_size = super.is_null() ? 0 : super->nonstatic_oop_map_size(); | |
3141 if (nonstatic_oop_map_count > 0) { | |
3142 // We have oops to add to map | |
3143 if (map_size == 0) { | |
3144 map_size = nonstatic_oop_map_count; | |
3145 } else { | |
3146 // Check whether we should add a new map block or whether the last one can be extended | |
3147 OopMapBlock* first_map = super->start_of_nonstatic_oop_maps(); | |
3148 OopMapBlock* last_map = first_map + map_size - 1; | |
3149 | |
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3150 int next_offset = last_map->offset() + (last_map->length() * heapOopSize); |
0 | 3151 if (next_offset == first_nonstatic_oop_offset) { |
3152 // There is no gap bettwen superklass's last oop field and first | |
3153 // local oop field, merge maps. | |
3154 nonstatic_oop_map_count -= 1; | |
3155 } else { | |
3156 // Superklass didn't end with a oop field, add extra maps | |
3157 assert(next_offset<first_nonstatic_oop_offset, "just checking"); | |
3158 } | |
3159 map_size += nonstatic_oop_map_count; | |
3160 } | |
3161 } | |
3162 return map_size; | |
3163 } | |
3164 | |
3165 | |
3166 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
3167 int nonstatic_oop_map_count, | |
3168 u2* nonstatic_oop_offsets, u2* nonstatic_oop_length) { | |
3169 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); | |
3170 OopMapBlock* last_oop_map = this_oop_map + k->nonstatic_oop_map_size(); | |
3171 instanceKlass* super = k->superklass(); | |
3172 if (super != NULL) { | |
3173 int super_oop_map_size = super->nonstatic_oop_map_size(); | |
3174 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); | |
3175 // Copy maps from superklass | |
3176 while (super_oop_map_size-- > 0) { | |
3177 *this_oop_map++ = *super_oop_map++; | |
3178 } | |
3179 } | |
3180 if (nonstatic_oop_map_count > 0) { | |
3181 if (this_oop_map + nonstatic_oop_map_count > last_oop_map) { | |
3182 // Calculated in compute_oop_map_size() number of oop maps is less then | |
3183 // collected oop maps since there is no gap between superklass's last oop | |
3184 // field and first local oop field. Extend the last oop map copied | |
3185 // from the superklass instead of creating new one. | |
3186 nonstatic_oop_map_count--; | |
3187 nonstatic_oop_offsets++; | |
3188 this_oop_map--; | |
3189 this_oop_map->set_length(this_oop_map->length() + *nonstatic_oop_length++); | |
3190 this_oop_map++; | |
3191 } | |
3192 assert((this_oop_map + nonstatic_oop_map_count) == last_oop_map, "just checking"); | |
3193 // Add new map blocks, fill them | |
3194 while (nonstatic_oop_map_count-- > 0) { | |
3195 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
3196 this_oop_map->set_length(*nonstatic_oop_length++); | |
3197 this_oop_map++; | |
3198 } | |
3199 } | |
3200 } | |
3201 | |
3202 | |
3203 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
3204 klassOop super = k->super(); | |
3205 | |
3206 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
3207 // in which case we don't have to register objects as finalizable | |
3208 if (!_has_empty_finalizer) { | |
3209 if (_has_finalizer || | |
3210 (super != NULL && super->klass_part()->has_finalizer())) { | |
3211 k->set_has_finalizer(); | |
3212 } | |
3213 } | |
3214 | |
3215 #ifdef ASSERT | |
3216 bool f = false; | |
3217 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
3218 vmSymbols::void_method_signature()); | |
3219 if (m != NULL && !m->is_empty_method()) { | |
3220 f = true; | |
3221 } | |
3222 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
3223 #endif | |
3224 | |
3225 // Check if this klass supports the java.lang.Cloneable interface | |
3226 if (SystemDictionary::cloneable_klass_loaded()) { | |
3227 if (k->is_subtype_of(SystemDictionary::cloneable_klass())) { | |
3228 k->set_is_cloneable(); | |
3229 } | |
3230 } | |
3231 | |
3232 // Check if this klass has a vanilla default constructor | |
3233 if (super == NULL) { | |
3234 // java.lang.Object has empty default constructor | |
3235 k->set_has_vanilla_constructor(); | |
3236 } else { | |
3237 if (Klass::cast(super)->has_vanilla_constructor() && | |
3238 _has_vanilla_constructor) { | |
3239 k->set_has_vanilla_constructor(); | |
3240 } | |
3241 #ifdef ASSERT | |
3242 bool v = false; | |
3243 if (Klass::cast(super)->has_vanilla_constructor()) { | |
3244 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
3245 ), vmSymbols::void_method_signature()); | |
3246 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
3247 v = true; | |
3248 } | |
3249 } | |
3250 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
3251 #endif | |
3252 } | |
3253 | |
3254 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
3255 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
3256 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
3257 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
3258 || k->is_abstract() || k->is_interface() | |
3259 || (k->name() == vmSymbols::java_lang_Class() | |
3260 && k->class_loader() == NULL) | |
3261 || k->size_helper() >= FastAllocateSizeLimit) { | |
3262 // Forbid fast-path allocation. | |
3263 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
3264 k->set_layout_helper(lh); | |
3265 } | |
3266 } | |
3267 | |
3268 | |
3269 // utility method for appending and array with check for duplicates | |
3270 | |
3271 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
3272 // iterate over new interfaces | |
3273 for (int i = 0; i < ifs->length(); i++) { | |
3274 oop e = ifs->obj_at(i); | |
3275 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
3276 // check for duplicates | |
3277 bool duplicate = false; | |
3278 for (int j = 0; j < index; j++) { | |
3279 if (result->obj_at(j) == e) { | |
3280 duplicate = true; | |
3281 break; | |
3282 } | |
3283 } | |
3284 // add new interface | |
3285 if (!duplicate) { | |
3286 result->obj_at_put(index++, e); | |
3287 } | |
3288 } | |
3289 } | |
3290 | |
3291 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
3292 // Compute maximum size for transitive interfaces | |
3293 int max_transitive_size = 0; | |
3294 int super_size = 0; | |
3295 // Add superclass transitive interfaces size | |
3296 if (super.not_null()) { | |
3297 super_size = super->transitive_interfaces()->length(); | |
3298 max_transitive_size += super_size; | |
3299 } | |
3300 // Add local interfaces' super interfaces | |
3301 int local_size = local_ifs->length(); | |
3302 for (int i = 0; i < local_size; i++) { | |
3303 klassOop l = klassOop(local_ifs->obj_at(i)); | |
3304 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
3305 } | |
3306 // Finally add local interfaces | |
3307 max_transitive_size += local_size; | |
3308 // Construct array | |
3309 objArrayHandle result; | |
3310 if (max_transitive_size == 0) { | |
3311 // no interfaces, use canonicalized array | |
3312 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
3313 } else if (max_transitive_size == super_size) { | |
3314 // no new local interfaces added, share superklass' transitive interface array | |
3315 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
3316 } else if (max_transitive_size == local_size) { | |
3317 // only local interfaces added, share local interface array | |
3318 result = local_ifs; | |
3319 } else { | |
3320 objArrayHandle nullHandle; | |
3321 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
3322 result = objArrayHandle(THREAD, new_objarray); | |
3323 int index = 0; | |
3324 // Copy down from superclass | |
3325 if (super.not_null()) { | |
3326 append_interfaces(result, index, super->transitive_interfaces()); | |
3327 } | |
3328 // Copy down from local interfaces' superinterfaces | |
3329 for (int i = 0; i < local_ifs->length(); i++) { | |
3330 klassOop l = klassOop(local_ifs->obj_at(i)); | |
3331 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
3332 } | |
3333 // Finally add local interfaces | |
3334 append_interfaces(result, index, local_ifs()); | |
3335 | |
3336 // Check if duplicates were removed | |
3337 if (index != max_transitive_size) { | |
3338 assert(index < max_transitive_size, "just checking"); | |
3339 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
3340 for (int i = 0; i < index; i++) { | |
3341 oop e = result->obj_at(i); | |
3342 assert(e != NULL, "just checking"); | |
3343 new_result->obj_at_put(i, e); | |
3344 } | |
3345 result = objArrayHandle(THREAD, new_result); | |
3346 } | |
3347 } | |
3348 return result; | |
3349 } | |
3350 | |
3351 | |
3352 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
3353 klassOop super = this_klass->super(); | |
3354 if ((super != NULL) && | |
3355 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
3356 ResourceMark rm(THREAD); | |
3357 Exceptions::fthrow( | |
3358 THREAD_AND_LOCATION, | |
3359 vmSymbolHandles::java_lang_IllegalAccessError(), | |
3360 "class %s cannot access its superclass %s", | |
3361 this_klass->external_name(), | |
3362 instanceKlass::cast(super)->external_name() | |
3363 ); | |
3364 return; | |
3365 } | |
3366 } | |
3367 | |
3368 | |
3369 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
3370 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
3371 int lng = local_interfaces->length(); | |
3372 for (int i = lng - 1; i >= 0; i--) { | |
3373 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
3374 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
3375 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
3376 ResourceMark rm(THREAD); | |
3377 Exceptions::fthrow( | |
3378 THREAD_AND_LOCATION, | |
3379 vmSymbolHandles::java_lang_IllegalAccessError(), | |
3380 "class %s cannot access its superinterface %s", | |
3381 this_klass->external_name(), | |
3382 instanceKlass::cast(k)->external_name() | |
3383 ); | |
3384 return; | |
3385 } | |
3386 } | |
3387 } | |
3388 | |
3389 | |
3390 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
3391 objArrayHandle methods (THREAD, this_klass->methods()); | |
3392 int num_methods = methods->length(); | |
3393 | |
3394 // go thru each method and check if it overrides a final method | |
3395 for (int index = 0; index < num_methods; index++) { | |
3396 methodOop m = (methodOop)methods->obj_at(index); | |
3397 | |
3398 // skip private, static and <init> methods | |
3399 if ((!m->is_private()) && | |
3400 (!m->is_static()) && | |
3401 (m->name() != vmSymbols::object_initializer_name())) { | |
3402 | |
3403 symbolOop name = m->name(); | |
3404 symbolOop signature = m->signature(); | |
3405 klassOop k = this_klass->super(); | |
3406 methodOop super_m = NULL; | |
3407 while (k != NULL) { | |
3408 // skip supers that don't have final methods. | |
3409 if (k->klass_part()->has_final_method()) { | |
3410 // lookup a matching method in the super class hierarchy | |
3411 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
3412 if (super_m == NULL) { | |
3413 break; // didn't find any match; get out | |
3414 } | |
3415 | |
3416 if (super_m->is_final() && | |
3417 // matching method in super is final | |
3418 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
3419 super_m->method_holder(), | |
3420 super_m->method_holder(), | |
3421 super_m->access_flags(), false)) | |
3422 // this class can access super final method and therefore override | |
3423 ) { | |
3424 ResourceMark rm(THREAD); | |
3425 Exceptions::fthrow( | |
3426 THREAD_AND_LOCATION, | |
3427 vmSymbolHandles::java_lang_VerifyError(), | |
3428 "class %s overrides final method %s.%s", | |
3429 this_klass->external_name(), | |
3430 name->as_C_string(), | |
3431 signature->as_C_string() | |
3432 ); | |
3433 return; | |
3434 } | |
3435 | |
3436 // continue to look from super_m's holder's super. | |
3437 k = instanceKlass::cast(super_m->method_holder())->super(); | |
3438 continue; | |
3439 } | |
3440 | |
3441 k = k->klass_part()->super(); | |
3442 } | |
3443 } | |
3444 } | |
3445 } | |
3446 | |
3447 | |
3448 // assumes that this_klass is an interface | |
3449 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
3450 assert(this_klass->is_interface(), "not an interface"); | |
3451 objArrayHandle methods (THREAD, this_klass->methods()); | |
3452 int num_methods = methods->length(); | |
3453 | |
3454 for (int index = 0; index < num_methods; index++) { | |
3455 methodOop m = (methodOop)methods->obj_at(index); | |
3456 // if m is static and not the init method, throw a verify error | |
3457 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
3458 ResourceMark rm(THREAD); | |
3459 Exceptions::fthrow( | |
3460 THREAD_AND_LOCATION, | |
3461 vmSymbolHandles::java_lang_VerifyError(), | |
3462 "Illegal static method %s in interface %s", | |
3463 m->name()->as_C_string(), | |
3464 this_klass->external_name() | |
3465 ); | |
3466 return; | |
3467 } | |
3468 } | |
3469 } | |
3470 | |
3471 // utility methods for format checking | |
3472 | |
3473 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
3474 if (!_need_verify) { return; } | |
3475 | |
3476 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
3477 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
3478 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3479 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
3480 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
3481 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
3482 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3483 | |
3484 if ((is_abstract && is_final) || | |
3485 (is_interface && !is_abstract) || | |
3486 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
3487 (!is_interface && major_gte_15 && is_annotation)) { | |
3488 ResourceMark rm(THREAD); | |
3489 Exceptions::fthrow( | |
3490 THREAD_AND_LOCATION, | |
3491 vmSymbolHandles::java_lang_ClassFormatError(), | |
3492 "Illegal class modifiers in class %s: 0x%X", | |
3493 _class_name->as_C_string(), flags | |
3494 ); | |
3495 return; | |
3496 } | |
3497 } | |
3498 | |
3499 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
3500 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3501 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
3502 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3503 | |
3504 return ((is_public && is_protected) || | |
3505 (is_public && is_private) || | |
3506 (is_protected && is_private)); | |
3507 } | |
3508 | |
3509 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
3510 return (major >= JAVA_MIN_SUPPORTED_VERSION) && | |
3511 (major <= JAVA_MAX_SUPPORTED_VERSION) && | |
3512 ((major != JAVA_MAX_SUPPORTED_VERSION) || | |
3513 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); | |
3514 } | |
3515 | |
3516 void ClassFileParser::verify_legal_field_modifiers( | |
3517 jint flags, bool is_interface, TRAPS) { | |
3518 if (!_need_verify) { return; } | |
3519 | |
3520 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3521 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
3522 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3523 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
3524 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3525 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
3526 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
3527 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
3528 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3529 | |
3530 bool is_illegal = false; | |
3531 | |
3532 if (is_interface) { | |
3533 if (!is_public || !is_static || !is_final || is_private || | |
3534 is_protected || is_volatile || is_transient || | |
3535 (major_gte_15 && is_enum)) { | |
3536 is_illegal = true; | |
3537 } | |
3538 } else { // not interface | |
3539 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
3540 is_illegal = true; | |
3541 } | |
3542 } | |
3543 | |
3544 if (is_illegal) { | |
3545 ResourceMark rm(THREAD); | |
3546 Exceptions::fthrow( | |
3547 THREAD_AND_LOCATION, | |
3548 vmSymbolHandles::java_lang_ClassFormatError(), | |
3549 "Illegal field modifiers in class %s: 0x%X", | |
3550 _class_name->as_C_string(), flags); | |
3551 return; | |
3552 } | |
3553 } | |
3554 | |
3555 void ClassFileParser::verify_legal_method_modifiers( | |
3556 jint flags, bool is_interface, symbolHandle name, TRAPS) { | |
3557 if (!_need_verify) { return; } | |
3558 | |
3559 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3560 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3561 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
3562 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3563 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
3564 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
3565 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
3566 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
3567 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
3568 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3569 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
3570 | |
3571 bool is_illegal = false; | |
3572 | |
3573 if (is_interface) { | |
3574 if (!is_abstract || !is_public || is_static || is_final || | |
3575 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
3576 is_illegal = true; | |
3577 } | |
3578 } else { // not interface | |
3579 if (is_initializer) { | |
3580 if (is_static || is_final || is_synchronized || is_native || | |
3581 is_abstract || (major_gte_15 && is_bridge)) { | |
3582 is_illegal = true; | |
3583 } | |
3584 } else { // not initializer | |
3585 if (is_abstract) { | |
3586 if ((is_final || is_native || is_private || is_static || | |
3587 (major_gte_15 && (is_synchronized || is_strict)))) { | |
3588 is_illegal = true; | |
3589 } | |
3590 } | |
3591 if (has_illegal_visibility(flags)) { | |
3592 is_illegal = true; | |
3593 } | |
3594 } | |
3595 } | |
3596 | |
3597 if (is_illegal) { | |
3598 ResourceMark rm(THREAD); | |
3599 Exceptions::fthrow( | |
3600 THREAD_AND_LOCATION, | |
3601 vmSymbolHandles::java_lang_ClassFormatError(), | |
3602 "Method %s in class %s has illegal modifiers: 0x%X", | |
3603 name->as_C_string(), _class_name->as_C_string(), flags); | |
3604 return; | |
3605 } | |
3606 } | |
3607 | |
3608 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
3609 assert(_need_verify, "only called when _need_verify is true"); | |
3610 int i = 0; | |
3611 int count = length >> 2; | |
3612 for (int k=0; k<count; k++) { | |
3613 unsigned char b0 = buffer[i]; | |
3614 unsigned char b1 = buffer[i+1]; | |
3615 unsigned char b2 = buffer[i+2]; | |
3616 unsigned char b3 = buffer[i+3]; | |
3617 // For an unsigned char v, | |
3618 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
3619 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
3620 unsigned char res = b0 | b0 - 1 | | |
3621 b1 | b1 - 1 | | |
3622 b2 | b2 - 1 | | |
3623 b3 | b3 - 1; | |
3624 if (res >= 128) break; | |
3625 i += 4; | |
3626 } | |
3627 for(; i < length; i++) { | |
3628 unsigned short c; | |
3629 // no embedded zeros | |
3630 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3631 if(buffer[i] < 128) { | |
3632 continue; | |
3633 } | |
3634 if ((i + 5) < length) { // see if it's legal supplementary character | |
3635 if (UTF8::is_supplementary_character(&buffer[i])) { | |
3636 c = UTF8::get_supplementary_character(&buffer[i]); | |
3637 i += 5; | |
3638 continue; | |
3639 } | |
3640 } | |
3641 switch (buffer[i] >> 4) { | |
3642 default: break; | |
3643 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
3644 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3645 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
3646 c = (buffer[i] & 0x1F) << 6; | |
3647 i++; | |
3648 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
3649 c += buffer[i] & 0x3F; | |
3650 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
3651 // for classes with major > 47, c must a null or a character in its shortest form | |
3652 break; | |
3653 } | |
3654 } | |
3655 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3656 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
3657 c = (buffer[i] & 0xF) << 12; | |
3658 i += 2; | |
3659 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
3660 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
3661 if (_major_version <= 47 || c >= 0x800) { | |
3662 // for classes with major > 47, c must be in its shortest form | |
3663 break; | |
3664 } | |
3665 } | |
3666 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3667 } // end of switch | |
3668 } // end of for | |
3669 } | |
3670 | |
3671 // Checks if name is a legal class name. | |
3672 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) { | |
3673 if (!_need_verify || _relax_verify) { return; } | |
3674 | |
3675 char buf[fixed_buffer_size]; | |
3676 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3677 unsigned int length = name->utf8_length(); | |
3678 bool legal = false; | |
3679 | |
3680 if (length > 0) { | |
3681 char* p; | |
3682 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
3683 p = skip_over_field_signature(bytes, false, length, CHECK); | |
3684 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3685 } else if (_major_version < JAVA_1_5_VERSION) { | |
3686 if (bytes[0] != '<') { | |
3687 p = skip_over_field_name(bytes, true, length); | |
3688 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3689 } | |
3690 } else { | |
3691 // 4900761: relax the constraints based on JSR202 spec | |
3692 // Class names may be drawn from the entire Unicode character set. | |
3693 // Identifiers between '/' must be unqualified names. | |
3694 // The utf8 string has been verified when parsing cpool entries. | |
3695 legal = verify_unqualified_name(bytes, length, LegalClass); | |
3696 } | |
3697 } | |
3698 if (!legal) { | |
3699 ResourceMark rm(THREAD); | |
3700 Exceptions::fthrow( | |
3701 THREAD_AND_LOCATION, | |
3702 vmSymbolHandles::java_lang_ClassFormatError(), | |
3703 "Illegal class name \"%s\" in class file %s", bytes, | |
3704 _class_name->as_C_string() | |
3705 ); | |
3706 return; | |
3707 } | |
3708 } | |
3709 | |
3710 // Checks if name is a legal field name. | |
3711 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) { | |
3712 if (!_need_verify || _relax_verify) { return; } | |
3713 | |
3714 char buf[fixed_buffer_size]; | |
3715 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3716 unsigned int length = name->utf8_length(); | |
3717 bool legal = false; | |
3718 | |
3719 if (length > 0) { | |
3720 if (_major_version < JAVA_1_5_VERSION) { | |
3721 if (bytes[0] != '<') { | |
3722 char* p = skip_over_field_name(bytes, false, length); | |
3723 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3724 } | |
3725 } else { | |
3726 // 4881221: relax the constraints based on JSR202 spec | |
3727 legal = verify_unqualified_name(bytes, length, LegalField); | |
3728 } | |
3729 } | |
3730 | |
3731 if (!legal) { | |
3732 ResourceMark rm(THREAD); | |
3733 Exceptions::fthrow( | |
3734 THREAD_AND_LOCATION, | |
3735 vmSymbolHandles::java_lang_ClassFormatError(), | |
3736 "Illegal field name \"%s\" in class %s", bytes, | |
3737 _class_name->as_C_string() | |
3738 ); | |
3739 return; | |
3740 } | |
3741 } | |
3742 | |
3743 // Checks if name is a legal method name. | |
3744 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) { | |
3745 if (!_need_verify || _relax_verify) { return; } | |
3746 | |
3747 assert(!name.is_null(), "method name is null"); | |
3748 char buf[fixed_buffer_size]; | |
3749 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3750 unsigned int length = name->utf8_length(); | |
3751 bool legal = false; | |
3752 | |
3753 if (length > 0) { | |
3754 if (bytes[0] == '<') { | |
3755 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
3756 legal = true; | |
3757 } | |
3758 } else if (_major_version < JAVA_1_5_VERSION) { | |
3759 char* p; | |
3760 p = skip_over_field_name(bytes, false, length); | |
3761 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3762 } else { | |
3763 // 4881221: relax the constraints based on JSR202 spec | |
3764 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
3765 } | |
3766 } | |
3767 | |
3768 if (!legal) { | |
3769 ResourceMark rm(THREAD); | |
3770 Exceptions::fthrow( | |
3771 THREAD_AND_LOCATION, | |
3772 vmSymbolHandles::java_lang_ClassFormatError(), | |
3773 "Illegal method name \"%s\" in class %s", bytes, | |
3774 _class_name->as_C_string() | |
3775 ); | |
3776 return; | |
3777 } | |
3778 } | |
3779 | |
3780 | |
3781 // Checks if signature is a legal field signature. | |
3782 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
3783 if (!_need_verify) { return; } | |
3784 | |
3785 char buf[fixed_buffer_size]; | |
3786 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3787 unsigned int length = signature->utf8_length(); | |
3788 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
3789 | |
3790 if (p == NULL || (p - bytes) != (int)length) { | |
3791 ResourceMark rm(THREAD); | |
3792 Exceptions::fthrow( | |
3793 THREAD_AND_LOCATION, | |
3794 vmSymbolHandles::java_lang_ClassFormatError(), | |
3795 "Field \"%s\" in class %s has illegal signature \"%s\"", | |
3796 name->as_C_string(), _class_name->as_C_string(), bytes | |
3797 ); | |
3798 return; | |
3799 } | |
3800 } | |
3801 | |
3802 // Checks if signature is a legal method signature. | |
3803 // Returns number of parameters | |
3804 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
3805 if (!_need_verify) { | |
3806 // make sure caller's args_size will be less than 0 even for non-static | |
3807 // method so it will be recomputed in compute_size_of_parameters(). | |
3808 return -2; | |
3809 } | |
3810 | |
3811 unsigned int args_size = 0; | |
3812 char buf[fixed_buffer_size]; | |
3813 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3814 unsigned int length = signature->utf8_length(); | |
3815 char* nextp; | |
3816 | |
3817 // The first character must be a '(' | |
3818 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
3819 length--; | |
3820 // Skip over legal field signatures | |
3821 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
3822 while ((length > 0) && (nextp != NULL)) { | |
3823 args_size++; | |
3824 if (p[0] == 'J' || p[0] == 'D') { | |
3825 args_size++; | |
3826 } | |
3827 length -= nextp - p; | |
3828 p = nextp; | |
3829 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
3830 } | |
3831 // The first non-signature thing better be a ')' | |
3832 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
3833 length--; | |
3834 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
3835 // All internal methods must return void | |
3836 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
3837 return args_size; | |
3838 } | |
3839 } else { | |
3840 // Now we better just have a return value | |
3841 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
3842 if (nextp && ((int)length == (nextp - p))) { | |
3843 return args_size; | |
3844 } | |
3845 } | |
3846 } | |
3847 } | |
3848 // Report error | |
3849 ResourceMark rm(THREAD); | |
3850 Exceptions::fthrow( | |
3851 THREAD_AND_LOCATION, | |
3852 vmSymbolHandles::java_lang_ClassFormatError(), | |
3853 "Method \"%s\" in class %s has illegal signature \"%s\"", | |
3854 name->as_C_string(), _class_name->as_C_string(), p | |
3855 ); | |
3856 return 0; | |
3857 } | |
3858 | |
3859 | |
3860 // Unqualified names may not contain the characters '.', ';', or '/'. | |
3861 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>. | |
3862 // Note that method names may not be <init> or <clinit> in this method. | |
3863 // Because these names have been checked as special cases before calling this method | |
3864 // in verify_legal_method_name. | |
3865 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) { | |
3866 jchar ch; | |
3867 | |
3868 for (char* p = name; p != name + length; ) { | |
3869 ch = *p; | |
3870 if (ch < 128) { | |
3871 p++; | |
3872 if (ch == '.' || ch == ';') { | |
3873 return false; // do not permit '.' or ';' | |
3874 } | |
3875 if (type != LegalClass && ch == '/') { | |
3876 return false; // do not permit '/' unless it's class name | |
3877 } | |
3878 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
3879 return false; // do not permit '<' or '>' in method names | |
3880 } | |
3881 } else { | |
3882 char* tmp_p = UTF8::next(p, &ch); | |
3883 p = tmp_p; | |
3884 } | |
3885 } | |
3886 return true; | |
3887 } | |
3888 | |
3889 | |
3890 // Take pointer to a string. Skip over the longest part of the string that could | |
3891 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
3892 // Return a pointer to just past the fieldname. | |
3893 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
3894 // being true, we saw consecutive slashes (meaning we were looking for a | |
3895 // qualified path but found something that was badly-formed). | |
3896 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
3897 char* p; | |
3898 jchar ch; | |
3899 jboolean last_is_slash = false; | |
3900 jboolean not_first_ch = false; | |
3901 | |
3902 for (p = name; p != name + length; not_first_ch = true) { | |
3903 char* old_p = p; | |
3904 ch = *p; | |
3905 if (ch < 128) { | |
3906 p++; | |
3907 // quick check for ascii | |
3908 if ((ch >= 'a' && ch <= 'z') || | |
3909 (ch >= 'A' && ch <= 'Z') || | |
3910 (ch == '_' || ch == '$') || | |
3911 (not_first_ch && ch >= '0' && ch <= '9')) { | |
3912 last_is_slash = false; | |
3913 continue; | |
3914 } | |
3915 if (slash_ok && ch == '/') { | |
3916 if (last_is_slash) { | |
3917 return NULL; // Don't permit consecutive slashes | |
3918 } | |
3919 last_is_slash = true; | |
3920 continue; | |
3921 } | |
3922 } else { | |
3923 jint unicode_ch; | |
3924 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
3925 p = tmp_p; | |
3926 last_is_slash = false; | |
3927 // Check if ch is Java identifier start or is Java identifier part | |
3928 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
3929 EXCEPTION_MARK; | |
3930 instanceKlassHandle klass (THREAD, SystemDictionary::char_klass()); | |
3931 | |
3932 // return value | |
3933 JavaValue result(T_BOOLEAN); | |
3934 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
3935 JavaCallArguments args; | |
3936 args.push_int(unicode_ch); | |
3937 | |
3938 // public static boolean isJavaIdentifierStart(char ch); | |
3939 JavaCalls::call_static(&result, | |
3940 klass, | |
3941 vmSymbolHandles::isJavaIdentifierStart_name(), | |
3942 vmSymbolHandles::int_bool_signature(), | |
3943 &args, | |
3944 THREAD); | |
3945 | |
3946 if (HAS_PENDING_EXCEPTION) { | |
3947 CLEAR_PENDING_EXCEPTION; | |
3948 return 0; | |
3949 } | |
3950 if (result.get_jboolean()) { | |
3951 continue; | |
3952 } | |
3953 | |
3954 if (not_first_ch) { | |
3955 // public static boolean isJavaIdentifierPart(char ch); | |
3956 JavaCalls::call_static(&result, | |
3957 klass, | |
3958 vmSymbolHandles::isJavaIdentifierPart_name(), | |
3959 vmSymbolHandles::int_bool_signature(), | |
3960 &args, | |
3961 THREAD); | |
3962 | |
3963 if (HAS_PENDING_EXCEPTION) { | |
3964 CLEAR_PENDING_EXCEPTION; | |
3965 return 0; | |
3966 } | |
3967 | |
3968 if (result.get_jboolean()) { | |
3969 continue; | |
3970 } | |
3971 } | |
3972 } | |
3973 return (not_first_ch) ? old_p : NULL; | |
3974 } | |
3975 return (not_first_ch) ? p : NULL; | |
3976 } | |
3977 | |
3978 | |
3979 // Take pointer to a string. Skip over the longest part of the string that could | |
3980 // be taken as a field signature. Allow "void" if void_ok. | |
3981 // Return a pointer to just past the signature. | |
3982 // Return NULL if no legal signature is found. | |
3983 char* ClassFileParser::skip_over_field_signature(char* signature, | |
3984 bool void_ok, | |
3985 unsigned int length, | |
3986 TRAPS) { | |
3987 unsigned int array_dim = 0; | |
3988 while (length > 0) { | |
3989 switch (signature[0]) { | |
3990 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
3991 case JVM_SIGNATURE_BOOLEAN: | |
3992 case JVM_SIGNATURE_BYTE: | |
3993 case JVM_SIGNATURE_CHAR: | |
3994 case JVM_SIGNATURE_SHORT: | |
3995 case JVM_SIGNATURE_INT: | |
3996 case JVM_SIGNATURE_FLOAT: | |
3997 case JVM_SIGNATURE_LONG: | |
3998 case JVM_SIGNATURE_DOUBLE: | |
3999 return signature + 1; | |
4000 case JVM_SIGNATURE_CLASS: { | |
4001 if (_major_version < JAVA_1_5_VERSION) { | |
4002 // Skip over the class name if one is there | |
4003 char* p = skip_over_field_name(signature + 1, true, --length); | |
4004 | |
4005 // The next character better be a semicolon | |
4006 if (p && (p - signature) > 1 && p[0] == ';') { | |
4007 return p + 1; | |
4008 } | |
4009 } else { | |
4010 // 4900761: For class version > 48, any unicode is allowed in class name. | |
4011 length--; | |
4012 signature++; | |
4013 while (length > 0 && signature[0] != ';') { | |
4014 if (signature[0] == '.') { | |
4015 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
4016 } | |
4017 length--; | |
4018 signature++; | |
4019 } | |
4020 if (signature[0] == ';') { return signature + 1; } | |
4021 } | |
4022 | |
4023 return NULL; | |
4024 } | |
4025 case JVM_SIGNATURE_ARRAY: | |
4026 array_dim++; | |
4027 if (array_dim > 255) { | |
4028 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
4029 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
4030 } | |
4031 // The rest of what's there better be a legal signature | |
4032 signature++; | |
4033 length--; | |
4034 void_ok = false; | |
4035 break; | |
4036 | |
4037 default: | |
4038 return NULL; | |
4039 } | |
4040 } | |
4041 return NULL; | |
4042 } |