1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/classLoaderData.inline.hpp"
29 #include "classfile/defaultMethods.hpp"
30 #include "classfile/javaClasses.inline.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/systemDictionary.hpp"
33 #include "classfile/verificationType.hpp"
34 #include "classfile/verifier.hpp"
35 #include "classfile/vmSymbols.hpp"
36 #include "gc/shared/gcLocker.hpp"
37 #include "memory/allocation.hpp"
38 #include "memory/metadataFactory.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/referenceType.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.inline.hpp"
43 #include "oops/constantPool.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/instanceMirrorKlass.hpp"
47 #include "oops/klass.inline.hpp"
48 #include "oops/klassVtable.hpp"
49 #include "oops/method.hpp"
50 #include "oops/symbol.hpp"
51 #include "prims/jvm.h"
52 #include "prims/jvmtiExport.hpp"
53 #include "prims/jvmtiThreadState.hpp"
54 #include "runtime/javaCalls.hpp"
55 #include "runtime/perfData.hpp"
56 #include "runtime/reflection.hpp"
57 #include "runtime/signature.hpp"
58 #include "runtime/timer.hpp"
59 #include "services/classLoadingService.hpp"
60 #include "services/threadService.hpp"
61 #include "utilities/array.hpp"
62 #include "utilities/exceptions.hpp"
63 #include "utilities/globalDefinitions.hpp"
64 #include "utilities/macros.hpp"
65 #include "utilities/ostream.hpp"
66 #include "utilities/resourceHash.hpp"
67 #if INCLUDE_CDS
68 #include "classfile/systemDictionaryShared.hpp"
69 #endif
70
71 // We generally try to create the oops directly when parsing, rather than
72 // allocating temporary data structures and copying the bytes twice. A
73 // temporary area is only needed when parsing utf8 entries in the constant
74 // pool and when parsing line number tables.
75
76 // We add assert in debug mode when class format is not checked.
77
78 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
79 #define JAVA_MIN_SUPPORTED_VERSION 45
80 #define JAVA_MAX_SUPPORTED_VERSION 52
81 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
82
83 // Used for two backward compatibility reasons:
84 // - to check for new additions to the class file format in JDK1.5
85 // - to check for bug fixes in the format checker in JDK1.5
86 #define JAVA_1_5_VERSION 49
87
88 // Used for backward compatibility reasons:
89 // - to check for javac bug fixes that happened after 1.5
90 // - also used as the max version when running in jdk6
91 #define JAVA_6_VERSION 50
92
93 // Used for backward compatibility reasons:
94 // - to check NameAndType_info signatures more aggressively
95 #define JAVA_7_VERSION 51
96
97 // Extension method support.
98 #define JAVA_8_VERSION 52
99
100 void ClassFileParser::parse_constant_pool_entries(int length, TRAPS) {
101 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
102 // this function (_current can be allocated in a register, with scalar
103 // replacement of aggregates). The _current pointer is copied back to
104 // stream() when this function returns. DON'T call another method within
105 // this method that uses stream().
106 ClassFileStream* cfs0 = stream();
107 ClassFileStream cfs1 = *cfs0;
108 ClassFileStream* cfs = &cfs1;
109 #ifdef ASSERT
110 assert(cfs->allocated_on_stack(),"should be local");
111 u1* old_current = cfs0->current();
112 #endif
113 Handle class_loader(THREAD, _loader_data->class_loader());
114
115 // Used for batching symbol allocations.
116 const char* names[SymbolTable::symbol_alloc_batch_size];
117 int lengths[SymbolTable::symbol_alloc_batch_size];
118 int indices[SymbolTable::symbol_alloc_batch_size];
119 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
120 int names_count = 0;
121
122 // parsing Index 0 is unused
123 for (int index = 1; index < length; index++) {
124 // Each of the following case guarantees one more byte in the stream
125 // for the following tag or the access_flags following constant pool,
126 // so we don't need bounds-check for reading tag.
127 u1 tag = cfs->get_u1_fast();
128 switch (tag) {
129 case JVM_CONSTANT_Class :
130 {
131 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
132 u2 name_index = cfs->get_u2_fast();
133 _cp->klass_index_at_put(index, name_index);
134 }
135 break;
136 case JVM_CONSTANT_Fieldref :
137 {
138 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
139 u2 class_index = cfs->get_u2_fast();
140 u2 name_and_type_index = cfs->get_u2_fast();
141 _cp->field_at_put(index, class_index, name_and_type_index);
142 }
143 break;
144 case JVM_CONSTANT_Methodref :
145 {
146 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
147 u2 class_index = cfs->get_u2_fast();
148 u2 name_and_type_index = cfs->get_u2_fast();
149 _cp->method_at_put(index, class_index, name_and_type_index);
150 }
151 break;
152 case JVM_CONSTANT_InterfaceMethodref :
153 {
154 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
155 u2 class_index = cfs->get_u2_fast();
156 u2 name_and_type_index = cfs->get_u2_fast();
157 _cp->interface_method_at_put(index, class_index, name_and_type_index);
158 }
159 break;
160 case JVM_CONSTANT_String :
161 {
162 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
163 u2 string_index = cfs->get_u2_fast();
164 _cp->string_index_at_put(index, string_index);
165 }
166 break;
167 case JVM_CONSTANT_MethodHandle :
168 case JVM_CONSTANT_MethodType :
169 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
170 classfile_parse_error(
171 "Class file version does not support constant tag %u in class file %s",
172 tag, CHECK);
173 }
174 if (tag == JVM_CONSTANT_MethodHandle) {
175 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
176 u1 ref_kind = cfs->get_u1_fast();
177 u2 method_index = cfs->get_u2_fast();
178 _cp->method_handle_index_at_put(index, ref_kind, method_index);
179 } else if (tag == JVM_CONSTANT_MethodType) {
180 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
181 u2 signature_index = cfs->get_u2_fast();
182 _cp->method_type_index_at_put(index, signature_index);
183 } else {
184 ShouldNotReachHere();
185 }
186 break;
187 case JVM_CONSTANT_InvokeDynamic :
188 {
189 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
190 classfile_parse_error(
191 "Class file version does not support constant tag %u in class file %s",
192 tag, CHECK);
193 }
194 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
195 u2 bootstrap_specifier_index = cfs->get_u2_fast();
196 u2 name_and_type_index = cfs->get_u2_fast();
197 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
198 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
199 _cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
200 }
201 break;
202 case JVM_CONSTANT_Integer :
203 {
204 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
205 u4 bytes = cfs->get_u4_fast();
206 _cp->int_at_put(index, (jint) bytes);
207 }
208 break;
209 case JVM_CONSTANT_Float :
210 {
211 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
212 u4 bytes = cfs->get_u4_fast();
213 _cp->float_at_put(index, *(jfloat*)&bytes);
214 }
215 break;
216 case JVM_CONSTANT_Long :
217 // A mangled type might cause you to overrun allocated memory
218 guarantee_property(index+1 < length,
219 "Invalid constant pool entry %u in class file %s",
220 index, CHECK);
221 {
222 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
223 u8 bytes = cfs->get_u8_fast();
224 _cp->long_at_put(index, bytes);
225 }
226 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
227 break;
228 case JVM_CONSTANT_Double :
229 // A mangled type might cause you to overrun allocated memory
230 guarantee_property(index+1 < length,
231 "Invalid constant pool entry %u in class file %s",
232 index, CHECK);
233 {
234 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
235 u8 bytes = cfs->get_u8_fast();
236 _cp->double_at_put(index, *(jdouble*)&bytes);
237 }
238 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
239 break;
240 case JVM_CONSTANT_NameAndType :
241 {
242 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
243 u2 name_index = cfs->get_u2_fast();
244 u2 signature_index = cfs->get_u2_fast();
245 _cp->name_and_type_at_put(index, name_index, signature_index);
246 }
247 break;
248 case JVM_CONSTANT_Utf8 :
249 {
250 cfs->guarantee_more(2, CHECK); // utf8_length
251 u2 utf8_length = cfs->get_u2_fast();
252 u1* utf8_buffer = cfs->get_u1_buffer();
253 assert(utf8_buffer != NULL, "null utf8 buffer");
254 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
255 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
256 cfs->skip_u1_fast(utf8_length);
257
258 // Before storing the symbol, make sure it's legal
259 if (_need_verify) {
260 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
261 }
262
263 if (has_cp_patch_at(index)) {
264 Handle patch = clear_cp_patch_at(index);
265 guarantee_property(java_lang_String::is_instance(patch()),
266 "Illegal utf8 patch at %d in class file %s",
267 index, CHECK);
268 char* str = java_lang_String::as_utf8_string(patch());
269 // (could use java_lang_String::as_symbol instead, but might as well batch them)
270 utf8_buffer = (u1*) str;
271 utf8_length = (int) strlen(str);
272 }
273
274 unsigned int hash;
275 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
276 if (result == NULL) {
277 names[names_count] = (char*)utf8_buffer;
278 lengths[names_count] = utf8_length;
279 indices[names_count] = index;
280 hashValues[names_count++] = hash;
281 if (names_count == SymbolTable::symbol_alloc_batch_size) {
282 SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK);
283 names_count = 0;
284 }
285 } else {
286 _cp->symbol_at_put(index, result);
287 }
288 }
289 break;
290 default:
291 classfile_parse_error(
292 "Unknown constant tag %u in class file %s", tag, CHECK);
293 break;
294 }
295 }
296
297 // Allocate the remaining symbols
298 if (names_count > 0) {
299 SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK);
300 }
301
302 // Copy _current pointer of local copy back to stream().
303 #ifdef ASSERT
304 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
305 #endif
306 cfs0->set_current(cfs1.current());
307 }
308
309 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
310
311 inline Symbol* check_symbol_at(constantPoolHandle cp, int index) {
312 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8())
313 return cp->symbol_at(index);
314 else
315 return NULL;
316 }
317
318 PRAGMA_DIAG_PUSH
319 PRAGMA_FORMAT_NONLITERAL_IGNORED
320 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) {
321 ResourceMark rm(THREAD);
322 fatal(err_msg(msg, _class_name->as_C_string()));
323 }
324
325 void ClassFileParser::report_assert_property_failure(const char* msg, int index, TRAPS) {
326 ResourceMark rm(THREAD);
327 fatal(err_msg(msg, index, _class_name->as_C_string()));
328 }
329 PRAGMA_DIAG_POP
330
331 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
332 ClassFileStream* cfs = stream();
333 constantPoolHandle nullHandle;
334
335 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
336 u2 length = cfs->get_u2_fast();
337 guarantee_property(
338 length >= 1, "Illegal constant pool size %u in class file %s",
339 length, CHECK_(nullHandle));
340 ConstantPool* constant_pool = ConstantPool::allocate(_loader_data, length,
341 CHECK_(nullHandle));
342 _cp = constant_pool; // save in case of errors
343 constantPoolHandle cp (THREAD, constant_pool);
344
345 // parsing constant pool entries
346 parse_constant_pool_entries(length, CHECK_(nullHandle));
347
348 int index = 1; // declared outside of loops for portability
349
350 // first verification pass - validate cross references and fixup class and string constants
351 for (index = 1; index < length; index++) { // Index 0 is unused
352 jbyte tag = cp->tag_at(index).value();
353 switch (tag) {
354 case JVM_CONSTANT_Class :
355 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
356 break;
357 case JVM_CONSTANT_Fieldref :
358 // fall through
359 case JVM_CONSTANT_Methodref :
360 // fall through
361 case JVM_CONSTANT_InterfaceMethodref : {
362 if (!_need_verify) break;
363 int klass_ref_index = cp->klass_ref_index_at(index);
364 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
365 check_property(valid_klass_reference_at(klass_ref_index),
366 "Invalid constant pool index %u in class file %s",
367 klass_ref_index,
368 CHECK_(nullHandle));
369 check_property(valid_cp_range(name_and_type_ref_index, length) &&
370 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
371 "Invalid constant pool index %u in class file %s",
372 name_and_type_ref_index,
373 CHECK_(nullHandle));
374 break;
375 }
376 case JVM_CONSTANT_String :
377 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
378 break;
379 case JVM_CONSTANT_Integer :
380 break;
381 case JVM_CONSTANT_Float :
382 break;
383 case JVM_CONSTANT_Long :
384 case JVM_CONSTANT_Double :
385 index++;
386 check_property(
387 (index < length && cp->tag_at(index).is_invalid()),
388 "Improper constant pool long/double index %u in class file %s",
389 index, CHECK_(nullHandle));
390 break;
391 case JVM_CONSTANT_NameAndType : {
392 if (!_need_verify) break;
393 int name_ref_index = cp->name_ref_index_at(index);
394 int signature_ref_index = cp->signature_ref_index_at(index);
395 check_property(valid_symbol_at(name_ref_index),
396 "Invalid constant pool index %u in class file %s",
397 name_ref_index, CHECK_(nullHandle));
398 check_property(valid_symbol_at(signature_ref_index),
399 "Invalid constant pool index %u in class file %s",
400 signature_ref_index, CHECK_(nullHandle));
401 break;
402 }
403 case JVM_CONSTANT_Utf8 :
404 break;
405 case JVM_CONSTANT_UnresolvedClass : // fall-through
406 case JVM_CONSTANT_UnresolvedClassInError:
407 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
408 break;
409 case JVM_CONSTANT_ClassIndex :
410 {
411 int class_index = cp->klass_index_at(index);
412 check_property(valid_symbol_at(class_index),
413 "Invalid constant pool index %u in class file %s",
414 class_index, CHECK_(nullHandle));
415 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
416 }
417 break;
418 case JVM_CONSTANT_StringIndex :
419 {
420 int string_index = cp->string_index_at(index);
421 check_property(valid_symbol_at(string_index),
422 "Invalid constant pool index %u in class file %s",
423 string_index, CHECK_(nullHandle));
424 Symbol* sym = cp->symbol_at(string_index);
425 cp->unresolved_string_at_put(index, sym);
426 }
427 break;
428 case JVM_CONSTANT_MethodHandle :
429 {
430 int ref_index = cp->method_handle_index_at(index);
431 check_property(
432 valid_cp_range(ref_index, length),
433 "Invalid constant pool index %u in class file %s",
434 ref_index, CHECK_(nullHandle));
435 constantTag tag = cp->tag_at(ref_index);
436 int ref_kind = cp->method_handle_ref_kind_at(index);
437 switch (ref_kind) {
438 case JVM_REF_getField:
439 case JVM_REF_getStatic:
440 case JVM_REF_putField:
441 case JVM_REF_putStatic:
442 check_property(
443 tag.is_field(),
444 "Invalid constant pool index %u in class file %s (not a field)",
445 ref_index, CHECK_(nullHandle));
446 break;
447 case JVM_REF_invokeVirtual:
448 case JVM_REF_newInvokeSpecial:
449 check_property(
450 tag.is_method(),
451 "Invalid constant pool index %u in class file %s (not a method)",
452 ref_index, CHECK_(nullHandle));
453 break;
454 case JVM_REF_invokeStatic:
455 case JVM_REF_invokeSpecial:
456 check_property(tag.is_method() ||
457 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
458 "Invalid constant pool index %u in class file %s (not a method)",
459 ref_index, CHECK_(nullHandle));
460 break;
461 case JVM_REF_invokeInterface:
462 check_property(
463 tag.is_interface_method(),
464 "Invalid constant pool index %u in class file %s (not an interface method)",
465 ref_index, CHECK_(nullHandle));
466 break;
467 default:
468 classfile_parse_error(
469 "Bad method handle kind at constant pool index %u in class file %s",
470 index, CHECK_(nullHandle));
471 }
472 // Keep the ref_index unchanged. It will be indirected at link-time.
473 }
474 break;
475 case JVM_CONSTANT_MethodType :
476 {
477 int ref_index = cp->method_type_index_at(index);
478 check_property(valid_symbol_at(ref_index),
479 "Invalid constant pool index %u in class file %s",
480 ref_index, CHECK_(nullHandle));
481 }
482 break;
483 case JVM_CONSTANT_InvokeDynamic :
484 {
485 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
486 check_property(valid_cp_range(name_and_type_ref_index, length) &&
487 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
488 "Invalid constant pool index %u in class file %s",
489 name_and_type_ref_index,
490 CHECK_(nullHandle));
491 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
492 break;
493 }
494 default:
495 fatal(err_msg("bad constant pool tag value %u",
496 cp->tag_at(index).value()));
497 ShouldNotReachHere();
498 break;
499 } // end of switch
500 } // end of for
501
502 if (_cp_patches != NULL) {
503 // need to treat this_class specially...
504 int this_class_index;
505 {
506 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
507 u1* mark = cfs->current();
508 u2 flags = cfs->get_u2_fast();
509 this_class_index = cfs->get_u2_fast();
510 cfs->set_current(mark); // revert to mark
511 }
512
513 for (index = 1; index < length; index++) { // Index 0 is unused
514 if (has_cp_patch_at(index)) {
515 guarantee_property(index != this_class_index,
516 "Illegal constant pool patch to self at %d in class file %s",
517 index, CHECK_(nullHandle));
518 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
519 }
520 }
521 }
522
523 if (!_need_verify) {
524 return cp;
525 }
526
527 // second verification pass - checks the strings are of the right format.
528 // but not yet to the other entries
529 for (index = 1; index < length; index++) {
530 jbyte tag = cp->tag_at(index).value();
531 switch (tag) {
532 case JVM_CONSTANT_UnresolvedClass: {
533 Symbol* class_name = cp->klass_name_at(index);
534 // check the name, even if _cp_patches will overwrite it
535 verify_legal_class_name(class_name, CHECK_(nullHandle));
536 break;
537 }
538 case JVM_CONSTANT_NameAndType: {
539 if (_need_verify && _major_version >= JAVA_7_VERSION) {
540 int sig_index = cp->signature_ref_index_at(index);
541 int name_index = cp->name_ref_index_at(index);
542 Symbol* name = cp->symbol_at(name_index);
543 Symbol* sig = cp->symbol_at(sig_index);
544 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
545 verify_legal_method_signature(name, sig, CHECK_(nullHandle));
546 } else {
547 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
548 }
549 }
550 break;
551 }
552 case JVM_CONSTANT_InvokeDynamic:
553 case JVM_CONSTANT_Fieldref:
554 case JVM_CONSTANT_Methodref:
555 case JVM_CONSTANT_InterfaceMethodref: {
556 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
557 // already verified to be utf8
558 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
559 // already verified to be utf8
560 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
561 Symbol* name = cp->symbol_at(name_ref_index);
562 Symbol* signature = cp->symbol_at(signature_ref_index);
563 if (tag == JVM_CONSTANT_Fieldref) {
564 verify_legal_field_name(name, CHECK_(nullHandle));
565 if (_need_verify && _major_version >= JAVA_7_VERSION) {
566 // Signature is verified above, when iterating NameAndType_info.
567 // Need only to be sure it's the right type.
568 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
569 throwIllegalSignature(
570 "Field", name, signature, CHECK_(nullHandle));
571 }
572 } else {
573 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
574 }
575 } else {
576 verify_legal_method_name(name, CHECK_(nullHandle));
577 if (_need_verify && _major_version >= JAVA_7_VERSION) {
578 // Signature is verified above, when iterating NameAndType_info.
579 // Need only to be sure it's the right type.
580 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
581 throwIllegalSignature(
582 "Method", name, signature, CHECK_(nullHandle));
583 }
584 } else {
585 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
586 }
587 if (tag == JVM_CONSTANT_Methodref) {
588 // 4509014: If a class method name begins with '<', it must be "<init>".
589 assert(name != NULL, "method name in constant pool is null");
590 unsigned int name_len = name->utf8_length();
591 assert(name_len > 0, "bad method name"); // already verified as legal name
592 if (name->byte_at(0) == '<') {
593 if (name != vmSymbols::object_initializer_name()) {
594 classfile_parse_error(
595 "Bad method name at constant pool index %u in class file %s",
596 name_ref_index, CHECK_(nullHandle));
597 }
598 }
599 }
600 }
601 break;
602 }
603 case JVM_CONSTANT_MethodHandle: {
604 int ref_index = cp->method_handle_index_at(index);
605 int ref_kind = cp->method_handle_ref_kind_at(index);
606 switch (ref_kind) {
607 case JVM_REF_invokeVirtual:
608 case JVM_REF_invokeStatic:
609 case JVM_REF_invokeSpecial:
610 case JVM_REF_newInvokeSpecial:
611 {
612 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
613 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
614 Symbol* name = cp->symbol_at(name_ref_index);
615 if (ref_kind == JVM_REF_newInvokeSpecial) {
616 if (name != vmSymbols::object_initializer_name()) {
617 classfile_parse_error(
618 "Bad constructor name at constant pool index %u in class file %s",
619 name_ref_index, CHECK_(nullHandle));
620 }
621 } else {
622 if (name == vmSymbols::object_initializer_name()) {
623 classfile_parse_error(
624 "Bad method name at constant pool index %u in class file %s",
625 name_ref_index, CHECK_(nullHandle));
626 }
627 }
628 }
629 break;
630 // Other ref_kinds are already fully checked in previous pass.
631 }
632 break;
633 }
634 case JVM_CONSTANT_MethodType: {
635 Symbol* no_name = vmSymbols::type_name(); // place holder
636 Symbol* signature = cp->method_type_signature_at(index);
637 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
638 break;
639 }
640 case JVM_CONSTANT_Utf8: {
641 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
642 }
643 } // end of switch
644 } // end of for
645
646 return cp;
647 }
648
649
650 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
651 BasicType patch_type = T_VOID;
652
653 switch (cp->tag_at(index).value()) {
654
655 case JVM_CONSTANT_UnresolvedClass :
656 // Patching a class means pre-resolving it.
657 // The name in the constant pool is ignored.
658 if (java_lang_Class::is_instance(patch())) {
659 guarantee_property(!java_lang_Class::is_primitive(patch()),
660 "Illegal class patch at %d in class file %s",
661 index, CHECK);
662 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
663 } else {
664 guarantee_property(java_lang_String::is_instance(patch()),
665 "Illegal class patch at %d in class file %s",
666 index, CHECK);
667 Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
668 cp->unresolved_klass_at_put(index, name);
669 }
670 break;
671
672 case JVM_CONSTANT_String :
673 // skip this patch and don't clear it. Needs the oop array for resolved
674 // references to be created first.
675 return;
676
677 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
678 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
679 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
680 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
681 patch_prim:
682 {
683 jvalue value;
684 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
685 guarantee_property(value_type == patch_type,
686 "Illegal primitive patch at %d in class file %s",
687 index, CHECK);
688 switch (value_type) {
689 case T_INT: cp->int_at_put(index, value.i); break;
690 case T_FLOAT: cp->float_at_put(index, value.f); break;
691 case T_LONG: cp->long_at_put(index, value.j); break;
692 case T_DOUBLE: cp->double_at_put(index, value.d); break;
693 default: assert(false, "");
694 }
695 }
696 break;
697
698 default:
699 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
700 guarantee_property(!has_cp_patch_at(index),
701 "Illegal unexpected patch at %d in class file %s",
702 index, CHECK);
703 return;
704 }
705
706 // On fall-through, mark the patch as used.
707 clear_cp_patch_at(index);
708 }
709
710
711 class NameSigHash: public ResourceObj {
712 public:
713 Symbol* _name; // name
714 Symbol* _sig; // signature
715 NameSigHash* _next; // Next entry in hash table
716 };
717
718
719 #define HASH_ROW_SIZE 256
720
721 unsigned int hash(Symbol* name, Symbol* sig) {
722 unsigned int raw_hash = 0;
723 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
724 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
725
726 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
727 }
728
729
730 void initialize_hashtable(NameSigHash** table) {
731 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
732 }
733
734 // Return false if the name/sig combination is found in table.
735 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
736 // The old format checker uses heap sort to find duplicates.
737 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
738 // of table since we don't expect Symbol*'s to move.
739 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
740 assert(name != NULL, "name in constant pool is NULL");
741
742 // First lookup for duplicates
743 int index = hash(name, sig);
744 NameSigHash* entry = table[index];
745 while (entry != NULL) {
746 if (entry->_name == name && entry->_sig == sig) {
747 return false;
748 }
749 entry = entry->_next;
750 }
751
752 // No duplicate is found, allocate a new entry and fill it.
753 entry = new NameSigHash();
754 entry->_name = name;
755 entry->_sig = sig;
756
757 // Insert into hash table
758 entry->_next = table[index];
759 table[index] = entry;
760
761 return true;
762 }
763
764
765 Array<Klass*>* ClassFileParser::parse_interfaces(int length,
766 Handle protection_domain,
767 Symbol* class_name,
768 bool* has_default_methods,
769 TRAPS) {
770 if (length == 0) {
771 _local_interfaces = Universe::the_empty_klass_array();
772 } else {
773 ClassFileStream* cfs = stream();
774 assert(length > 0, "only called for length>0");
775 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, length, NULL, CHECK_NULL);
776
777 int index;
778 for (index = 0; index < length; index++) {
779 u2 interface_index = cfs->get_u2(CHECK_NULL);
780 KlassHandle interf;
781 check_property(
782 valid_klass_reference_at(interface_index),
783 "Interface name has bad constant pool index %u in class file %s",
784 interface_index, CHECK_NULL);
785 if (_cp->tag_at(interface_index).is_klass()) {
786 interf = KlassHandle(THREAD, _cp->resolved_klass_at(interface_index));
787 } else {
788 Symbol* unresolved_klass = _cp->klass_name_at(interface_index);
789
790 // Don't need to check legal name because it's checked when parsing constant pool.
791 // But need to make sure it's not an array type.
792 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
793 "Bad interface name in class file %s", CHECK_NULL);
794 Handle class_loader(THREAD, _loader_data->class_loader());
795
796 // Call resolve_super so classcircularity is checked
797 Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
798 unresolved_klass, class_loader, protection_domain,
799 false, CHECK_NULL);
800 interf = KlassHandle(THREAD, k);
801 }
802
803 if (!interf()->is_interface()) {
804 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL);
805 }
806 if (InstanceKlass::cast(interf())->has_default_methods()) {
807 *has_default_methods = true;
808 }
809 _local_interfaces->at_put(index, interf());
810 }
811
812 if (!_need_verify || length <= 1) {
813 return _local_interfaces;
814 }
815
816 // Check if there's any duplicates in interfaces
817 ResourceMark rm(THREAD);
818 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
819 THREAD, NameSigHash*, HASH_ROW_SIZE);
820 initialize_hashtable(interface_names);
821 bool dup = false;
822 {
823 debug_only(No_Safepoint_Verifier nsv;)
824 for (index = 0; index < length; index++) {
825 Klass* k = _local_interfaces->at(index);
826 Symbol* name = InstanceKlass::cast(k)->name();
827 // If no duplicates, add (name, NULL) in hashtable interface_names.
828 if (!put_after_lookup(name, NULL, interface_names)) {
829 dup = true;
830 break;
831 }
832 }
833 }
834 if (dup) {
835 classfile_parse_error("Duplicate interface name in class file %s", CHECK_NULL);
836 }
837 }
838 return _local_interfaces;
839 }
840
841
842 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, TRAPS) {
843 // Make sure the constant pool entry is of a type appropriate to this field
844 guarantee_property(
845 (constantvalue_index > 0 &&
846 constantvalue_index < _cp->length()),
847 "Bad initial value index %u in ConstantValue attribute in class file %s",
848 constantvalue_index, CHECK);
849 constantTag value_type = _cp->tag_at(constantvalue_index);
850 switch ( _cp->basic_type_for_signature_at(signature_index) ) {
851 case T_LONG:
852 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
853 break;
854 case T_FLOAT:
855 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
856 break;
857 case T_DOUBLE:
858 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
859 break;
860 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
861 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
862 break;
863 case T_OBJECT:
864 guarantee_property((_cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
865 && value_type.is_string()),
866 "Bad string initial value in class file %s", CHECK);
867 break;
868 default:
869 classfile_parse_error(
870 "Unable to set initial value %u in class file %s",
871 constantvalue_index, CHECK);
872 }
873 }
874
875
876 // Parse attributes for a field.
877 void ClassFileParser::parse_field_attributes(u2 attributes_count,
878 bool is_static, u2 signature_index,
879 u2* constantvalue_index_addr,
880 bool* is_synthetic_addr,
881 u2* generic_signature_index_addr,
882 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
883 TRAPS) {
884 ClassFileStream* cfs = stream();
885 assert(attributes_count > 0, "length should be greater than 0");
886 u2 constantvalue_index = 0;
887 u2 generic_signature_index = 0;
888 bool is_synthetic = false;
889 u1* runtime_visible_annotations = NULL;
890 int runtime_visible_annotations_length = 0;
891 u1* runtime_invisible_annotations = NULL;
892 int runtime_invisible_annotations_length = 0;
893 u1* runtime_visible_type_annotations = NULL;
894 int runtime_visible_type_annotations_length = 0;
895 u1* runtime_invisible_type_annotations = NULL;
896 int runtime_invisible_type_annotations_length = 0;
897 bool runtime_invisible_annotations_exists = false;
898 bool runtime_invisible_type_annotations_exists = false;
899 while (attributes_count--) {
900 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
901 u2 attribute_name_index = cfs->get_u2_fast();
902 u4 attribute_length = cfs->get_u4_fast();
903 check_property(valid_symbol_at(attribute_name_index),
904 "Invalid field attribute index %u in class file %s",
905 attribute_name_index,
906 CHECK);
907 Symbol* attribute_name = _cp->symbol_at(attribute_name_index);
908 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
909 // ignore if non-static
910 if (constantvalue_index != 0) {
911 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
912 }
913 check_property(
914 attribute_length == 2,
915 "Invalid ConstantValue field attribute length %u in class file %s",
916 attribute_length, CHECK);
917 constantvalue_index = cfs->get_u2(CHECK);
918 if (_need_verify) {
919 verify_constantvalue(constantvalue_index, signature_index, CHECK);
920 }
921 } else if (attribute_name == vmSymbols::tag_synthetic()) {
922 if (attribute_length != 0) {
923 classfile_parse_error(
924 "Invalid Synthetic field attribute length %u in class file %s",
925 attribute_length, CHECK);
926 }
927 is_synthetic = true;
928 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
929 if (attribute_length != 0) {
930 classfile_parse_error(
931 "Invalid Deprecated field attribute length %u in class file %s",
932 attribute_length, CHECK);
933 }
934 } else if (_major_version >= JAVA_1_5_VERSION) {
935 if (attribute_name == vmSymbols::tag_signature()) {
936 if (attribute_length != 2) {
937 classfile_parse_error(
938 "Wrong size %u for field's Signature attribute in class file %s",
939 attribute_length, CHECK);
940 }
941 generic_signature_index = parse_generic_signature_attribute(CHECK);
942 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
943 if (runtime_visible_annotations != NULL) {
944 classfile_parse_error(
945 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
946 }
947 runtime_visible_annotations_length = attribute_length;
948 runtime_visible_annotations = cfs->get_u1_buffer();
949 assert(runtime_visible_annotations != NULL, "null visible annotations");
950 parse_annotations(runtime_visible_annotations,
951 runtime_visible_annotations_length,
952 parsed_annotations);
953 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
954 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
955 if (runtime_invisible_annotations_exists) {
956 classfile_parse_error(
957 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
958 }
959 runtime_invisible_annotations_exists = true;
960 if (PreserveAllAnnotations) {
961 runtime_invisible_annotations_length = attribute_length;
962 runtime_invisible_annotations = cfs->get_u1_buffer();
963 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
964 }
965 cfs->skip_u1(attribute_length, CHECK);
966 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
967 if (runtime_visible_type_annotations != NULL) {
968 classfile_parse_error(
969 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
970 }
971 runtime_visible_type_annotations_length = attribute_length;
972 runtime_visible_type_annotations = cfs->get_u1_buffer();
973 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
974 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
975 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
976 if (runtime_invisible_type_annotations_exists) {
977 classfile_parse_error(
978 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
979 } else {
980 runtime_invisible_type_annotations_exists = true;
981 }
982 if (PreserveAllAnnotations) {
983 runtime_invisible_type_annotations_length = attribute_length;
984 runtime_invisible_type_annotations = cfs->get_u1_buffer();
985 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
986 }
987 cfs->skip_u1(attribute_length, CHECK);
988 } else {
989 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
990 }
991 } else {
992 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
993 }
994 }
995
996 *constantvalue_index_addr = constantvalue_index;
997 *is_synthetic_addr = is_synthetic;
998 *generic_signature_index_addr = generic_signature_index;
999 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1000 runtime_visible_annotations_length,
1001 runtime_invisible_annotations,
1002 runtime_invisible_annotations_length,
1003 CHECK);
1004 parsed_annotations->set_field_annotations(a);
1005 a = assemble_annotations(runtime_visible_type_annotations,
1006 runtime_visible_type_annotations_length,
1007 runtime_invisible_type_annotations,
1008 runtime_invisible_type_annotations_length,
1009 CHECK);
1010 parsed_annotations->set_field_type_annotations(a);
1011 return;
1012 }
1013
1014
1015 // Field allocation types. Used for computing field offsets.
1016
1017 enum FieldAllocationType {
1018 STATIC_OOP, // Oops
1019 STATIC_BYTE, // Boolean, Byte, char
1020 STATIC_SHORT, // shorts
1021 STATIC_WORD, // ints
1022 STATIC_DOUBLE, // aligned long or double
1023 NONSTATIC_OOP,
1024 NONSTATIC_BYTE,
1025 NONSTATIC_SHORT,
1026 NONSTATIC_WORD,
1027 NONSTATIC_DOUBLE,
1028 MAX_FIELD_ALLOCATION_TYPE,
1029 BAD_ALLOCATION_TYPE = -1
1030 };
1031
1032 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1033 BAD_ALLOCATION_TYPE, // 0
1034 BAD_ALLOCATION_TYPE, // 1
1035 BAD_ALLOCATION_TYPE, // 2
1036 BAD_ALLOCATION_TYPE, // 3
1037 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1038 NONSTATIC_SHORT, // T_CHAR = 5,
1039 NONSTATIC_WORD, // T_FLOAT = 6,
1040 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1041 NONSTATIC_BYTE, // T_BYTE = 8,
1042 NONSTATIC_SHORT, // T_SHORT = 9,
1043 NONSTATIC_WORD, // T_INT = 10,
1044 NONSTATIC_DOUBLE, // T_LONG = 11,
1045 NONSTATIC_OOP, // T_OBJECT = 12,
1046 NONSTATIC_OOP, // T_ARRAY = 13,
1047 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1048 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1049 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1050 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1051 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1052 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1053 BAD_ALLOCATION_TYPE, // 0
1054 BAD_ALLOCATION_TYPE, // 1
1055 BAD_ALLOCATION_TYPE, // 2
1056 BAD_ALLOCATION_TYPE, // 3
1057 STATIC_BYTE , // T_BOOLEAN = 4,
1058 STATIC_SHORT, // T_CHAR = 5,
1059 STATIC_WORD, // T_FLOAT = 6,
1060 STATIC_DOUBLE, // T_DOUBLE = 7,
1061 STATIC_BYTE, // T_BYTE = 8,
1062 STATIC_SHORT, // T_SHORT = 9,
1063 STATIC_WORD, // T_INT = 10,
1064 STATIC_DOUBLE, // T_LONG = 11,
1065 STATIC_OOP, // T_OBJECT = 12,
1066 STATIC_OOP, // T_ARRAY = 13,
1067 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1068 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1069 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1070 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1071 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1072 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1073 };
1074
1075 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1076 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1077 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1078 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1079 return result;
1080 }
1081
1082 class FieldAllocationCount: public ResourceObj {
1083 public:
1084 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1085
1086 FieldAllocationCount() {
1087 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1088 count[i] = 0;
1089 }
1090 }
1091
1092 FieldAllocationType update(bool is_static, BasicType type) {
1093 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1094 // Make sure there is no overflow with injected fields.
1095 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1096 count[atype]++;
1097 return atype;
1098 }
1099 };
1100
1101 Array<u2>* ClassFileParser::parse_fields(Symbol* class_name,
1102 bool is_interface,
1103 FieldAllocationCount *fac,
1104 u2* java_fields_count_ptr, TRAPS) {
1105 ClassFileStream* cfs = stream();
1106 cfs->guarantee_more(2, CHECK_NULL); // length
1107 u2 length = cfs->get_u2_fast();
1108 *java_fields_count_ptr = length;
1109
1110 int num_injected = 0;
1111 InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1112 int total_fields = length + num_injected;
1113
1114 // The field array starts with tuples of shorts
1115 // [access, name index, sig index, initial value index, byte offset].
1116 // A generic signature slot only exists for field with generic
1117 // signature attribute. And the access flag is set with
1118 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1119 // signature slots are at the end of the field array and after all
1120 // other fields data.
1121 //
1122 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1123 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1124 // ...
1125 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1126 // [generic signature index]
1127 // [generic signature index]
1128 // ...
1129 //
1130 // Allocate a temporary resource array for field data. For each field,
1131 // a slot is reserved in the temporary array for the generic signature
1132 // index. After parsing all fields, the data are copied to a permanent
1133 // array and any unused slots will be discarded.
1134 ResourceMark rm(THREAD);
1135 u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1136 THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1137
1138 // The generic signature slots start after all other fields' data.
1139 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1140 int num_generic_signature = 0;
1141 for (int n = 0; n < length; n++) {
1142 cfs->guarantee_more(8, CHECK_NULL); // access_flags, name_index, descriptor_index, attributes_count
1143
1144 AccessFlags access_flags;
1145 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1146 verify_legal_field_modifiers(flags, is_interface, CHECK_NULL);
1147 access_flags.set_flags(flags);
1148
1149 u2 name_index = cfs->get_u2_fast();
1150 int cp_size = _cp->length();
1151 check_property(valid_symbol_at(name_index),
1152 "Invalid constant pool index %u for field name in class file %s",
1153 name_index,
1154 CHECK_NULL);
1155 Symbol* name = _cp->symbol_at(name_index);
1156 verify_legal_field_name(name, CHECK_NULL);
1157
1158 u2 signature_index = cfs->get_u2_fast();
1159 check_property(valid_symbol_at(signature_index),
1160 "Invalid constant pool index %u for field signature in class file %s",
1161 signature_index, CHECK_NULL);
1162 Symbol* sig = _cp->symbol_at(signature_index);
1163 verify_legal_field_signature(name, sig, CHECK_NULL);
1164
1165 u2 constantvalue_index = 0;
1166 bool is_synthetic = false;
1167 u2 generic_signature_index = 0;
1168 bool is_static = access_flags.is_static();
1169 FieldAnnotationCollector parsed_annotations(_loader_data);
1170
1171 u2 attributes_count = cfs->get_u2_fast();
1172 if (attributes_count > 0) {
1173 parse_field_attributes(attributes_count, is_static, signature_index,
1174 &constantvalue_index, &is_synthetic,
1175 &generic_signature_index, &parsed_annotations,
1176 CHECK_NULL);
1177 if (parsed_annotations.field_annotations() != NULL) {
1178 if (_fields_annotations == NULL) {
1179 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1180 _loader_data, length, NULL,
1181 CHECK_NULL);
1182 }
1183 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1184 parsed_annotations.set_field_annotations(NULL);
1185 }
1186 if (parsed_annotations.field_type_annotations() != NULL) {
1187 if (_fields_type_annotations == NULL) {
1188 _fields_type_annotations = MetadataFactory::new_array<AnnotationArray*>(
1189 _loader_data, length, NULL,
1190 CHECK_NULL);
1191 }
1192 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1193 parsed_annotations.set_field_type_annotations(NULL);
1194 }
1195
1196 if (is_synthetic) {
1197 access_flags.set_is_synthetic();
1198 }
1199 if (generic_signature_index != 0) {
1200 access_flags.set_field_has_generic_signature();
1201 fa[generic_signature_slot] = generic_signature_index;
1202 generic_signature_slot ++;
1203 num_generic_signature ++;
1204 }
1205 }
1206
1207 FieldInfo* field = FieldInfo::from_field_array(fa, n);
1208 field->initialize(access_flags.as_short(),
1209 name_index,
1210 signature_index,
1211 constantvalue_index);
1212 BasicType type = _cp->basic_type_for_signature_at(signature_index);
1213
1214 // Remember how many oops we encountered and compute allocation type
1215 FieldAllocationType atype = fac->update(is_static, type);
1216 field->set_allocation_type(atype);
1217
1218 // After field is initialized with type, we can augment it with aux info
1219 if (parsed_annotations.has_any_annotations())
1220 parsed_annotations.apply_to(field);
1221 }
1222
1223 int index = length;
1224 if (num_injected != 0) {
1225 for (int n = 0; n < num_injected; n++) {
1226 // Check for duplicates
1227 if (injected[n].may_be_java) {
1228 Symbol* name = injected[n].name();
1229 Symbol* signature = injected[n].signature();
1230 bool duplicate = false;
1231 for (int i = 0; i < length; i++) {
1232 FieldInfo* f = FieldInfo::from_field_array(fa, i);
1233 if (name == _cp->symbol_at(f->name_index()) &&
1234 signature == _cp->symbol_at(f->signature_index())) {
1235 // Symbol is desclared in Java so skip this one
1236 duplicate = true;
1237 break;
1238 }
1239 }
1240 if (duplicate) {
1241 // These will be removed from the field array at the end
1242 continue;
1243 }
1244 }
1245
1246 // Injected field
1247 FieldInfo* field = FieldInfo::from_field_array(fa, index);
1248 field->initialize(JVM_ACC_FIELD_INTERNAL,
1249 injected[n].name_index,
1250 injected[n].signature_index,
1251 0);
1252
1253 BasicType type = FieldType::basic_type(injected[n].signature());
1254
1255 // Remember how many oops we encountered and compute allocation type
1256 FieldAllocationType atype = fac->update(false, type);
1257 field->set_allocation_type(atype);
1258 index++;
1259 }
1260 }
1261
1262 // Now copy the fields' data from the temporary resource array.
1263 // Sometimes injected fields already exist in the Java source so
1264 // the fields array could be too long. In that case the
1265 // fields array is trimed. Also unused slots that were reserved
1266 // for generic signature indexes are discarded.
1267 Array<u2>* fields = MetadataFactory::new_array<u2>(
1268 _loader_data, index * FieldInfo::field_slots + num_generic_signature,
1269 CHECK_NULL);
1270 _fields = fields; // save in case of error
1271 {
1272 int i = 0;
1273 for (; i < index * FieldInfo::field_slots; i++) {
1274 fields->at_put(i, fa[i]);
1275 }
1276 for (int j = total_fields * FieldInfo::field_slots;
1277 j < generic_signature_slot; j++) {
1278 fields->at_put(i++, fa[j]);
1279 }
1280 assert(i == fields->length(), "");
1281 }
1282
1283 if (_need_verify && length > 1) {
1284 // Check duplicated fields
1285 ResourceMark rm(THREAD);
1286 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1287 THREAD, NameSigHash*, HASH_ROW_SIZE);
1288 initialize_hashtable(names_and_sigs);
1289 bool dup = false;
1290 {
1291 debug_only(No_Safepoint_Verifier nsv;)
1292 for (AllFieldStream fs(fields, _cp); !fs.done(); fs.next()) {
1293 Symbol* name = fs.name();
1294 Symbol* sig = fs.signature();
1295 // If no duplicates, add name/signature in hashtable names_and_sigs.
1296 if (!put_after_lookup(name, sig, names_and_sigs)) {
1297 dup = true;
1298 break;
1299 }
1300 }
1301 }
1302 if (dup) {
1303 classfile_parse_error("Duplicate field name&signature in class file %s",
1304 CHECK_NULL);
1305 }
1306 }
1307
1308 return fields;
1309 }
1310
1311
1312 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1313 while (length-- > 0) {
1314 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1315 }
1316 }
1317
1318
1319 u2* ClassFileParser::parse_exception_table(u4 code_length,
1320 u4 exception_table_length,
1321 TRAPS) {
1322 ClassFileStream* cfs = stream();
1323
1324 u2* exception_table_start = cfs->get_u2_buffer();
1325 assert(exception_table_start != NULL, "null exception table");
1326 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
1327 // Will check legal target after parsing code array in verifier.
1328 if (_need_verify) {
1329 for (unsigned int i = 0; i < exception_table_length; i++) {
1330 u2 start_pc = cfs->get_u2_fast();
1331 u2 end_pc = cfs->get_u2_fast();
1332 u2 handler_pc = cfs->get_u2_fast();
1333 u2 catch_type_index = cfs->get_u2_fast();
1334 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1335 "Illegal exception table range in class file %s",
1336 CHECK_NULL);
1337 guarantee_property(handler_pc < code_length,
1338 "Illegal exception table handler in class file %s",
1339 CHECK_NULL);
1340 if (catch_type_index != 0) {
1341 guarantee_property(valid_klass_reference_at(catch_type_index),
1342 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1343 }
1344 }
1345 } else {
1346 cfs->skip_u2_fast(exception_table_length * 4);
1347 }
1348 return exception_table_start;
1349 }
1350
1351 void ClassFileParser::parse_linenumber_table(
1352 u4 code_attribute_length, u4 code_length,
1353 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1354 ClassFileStream* cfs = stream();
1355 unsigned int num_entries = cfs->get_u2(CHECK);
1356
1357 // Each entry is a u2 start_pc, and a u2 line_number
1358 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1359
1360 // Verify line number attribute and table length
1361 check_property(
1362 code_attribute_length == sizeof(u2) + length_in_bytes,
1363 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1364
1365 cfs->guarantee_more(length_in_bytes, CHECK);
1366
1367 if ((*write_stream) == NULL) {
1368 if (length_in_bytes > fixed_buffer_size) {
1369 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1370 } else {
1371 (*write_stream) = new CompressedLineNumberWriteStream(
1372 linenumbertable_buffer, fixed_buffer_size);
1373 }
1374 }
1375
1376 while (num_entries-- > 0) {
1377 u2 bci = cfs->get_u2_fast(); // start_pc
1378 u2 line = cfs->get_u2_fast(); // line_number
1379 guarantee_property(bci < code_length,
1380 "Invalid pc in LineNumberTable in class file %s", CHECK);
1381 (*write_stream)->write_pair(bci, line);
1382 }
1383 }
1384
1385
1386 class LVT_Hash : public AllStatic {
1387 public:
1388
1389 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1390 /*
1391 * 3-tuple start_bci/length/slot has to be unique key,
1392 * so the following comparison seems to be redundant:
1393 * && elem->name_cp_index == entry->_elem->name_cp_index
1394 */
1395 return (e0.start_bci == e1.start_bci &&
1396 e0.length == e1.length &&
1397 e0.name_cp_index == e1.name_cp_index &&
1398 e0.slot == e1.slot);
1399 }
1400
1401 static unsigned int hash(LocalVariableTableElement const& e0) {
1402 unsigned int raw_hash = e0.start_bci;
1403
1404 raw_hash = e0.length + raw_hash * 37;
1405 raw_hash = e0.name_cp_index + raw_hash * 37;
1406 raw_hash = e0.slot + raw_hash * 37;
1407
1408 return raw_hash;
1409 }
1410 };
1411
1412
1413 // Class file LocalVariableTable elements.
1414 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1415 public:
1416 u2 start_bci;
1417 u2 length;
1418 u2 name_cp_index;
1419 u2 descriptor_cp_index;
1420 u2 slot;
1421 };
1422
1423 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1424 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1425 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1426 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1427 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1428 lvt->signature_cp_index = 0;
1429 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1430 }
1431
1432 // Function is used to parse both attributes:
1433 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1434 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1435 u2 max_locals,
1436 u4 code_attribute_length,
1437 u2* localvariable_table_length,
1438 bool isLVTT,
1439 TRAPS) {
1440 ClassFileStream* cfs = stream();
1441 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1442 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1443 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1444 // Verify local variable table attribute has right length
1445 if (_need_verify) {
1446 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1447 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1448 }
1449 u2* localvariable_table_start = cfs->get_u2_buffer();
1450 assert(localvariable_table_start != NULL, "null local variable table");
1451 if (!_need_verify) {
1452 cfs->skip_u2_fast(size);
1453 } else {
1454 cfs->guarantee_more(size * 2, CHECK_NULL);
1455 for(int i = 0; i < (*localvariable_table_length); i++) {
1456 u2 start_pc = cfs->get_u2_fast();
1457 u2 length = cfs->get_u2_fast();
1458 u2 name_index = cfs->get_u2_fast();
1459 u2 descriptor_index = cfs->get_u2_fast();
1460 u2 index = cfs->get_u2_fast();
1461 // Assign to a u4 to avoid overflow
1462 u4 end_pc = (u4)start_pc + (u4)length;
1463
1464 if (start_pc >= code_length) {
1465 classfile_parse_error(
1466 "Invalid start_pc %u in %s in class file %s",
1467 start_pc, tbl_name, CHECK_NULL);
1468 }
1469 if (end_pc > code_length) {
1470 classfile_parse_error(
1471 "Invalid length %u in %s in class file %s",
1472 length, tbl_name, CHECK_NULL);
1473 }
1474 int cp_size = _cp->length();
1475 guarantee_property(valid_symbol_at(name_index),
1476 "Name index %u in %s has bad constant type in class file %s",
1477 name_index, tbl_name, CHECK_NULL);
1478 guarantee_property(valid_symbol_at(descriptor_index),
1479 "Signature index %u in %s has bad constant type in class file %s",
1480 descriptor_index, tbl_name, CHECK_NULL);
1481
1482 Symbol* name = _cp->symbol_at(name_index);
1483 Symbol* sig = _cp->symbol_at(descriptor_index);
1484 verify_legal_field_name(name, CHECK_NULL);
1485 u2 extra_slot = 0;
1486 if (!isLVTT) {
1487 verify_legal_field_signature(name, sig, CHECK_NULL);
1488
1489 // 4894874: check special cases for double and long local variables
1490 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1491 sig == vmSymbols::type_signature(T_LONG)) {
1492 extra_slot = 1;
1493 }
1494 }
1495 guarantee_property((index + extra_slot) < max_locals,
1496 "Invalid index %u in %s in class file %s",
1497 index, tbl_name, CHECK_NULL);
1498 }
1499 }
1500 return localvariable_table_start;
1501 }
1502
1503
1504 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1505 u1* u1_array, u2* u2_array, TRAPS) {
1506 ClassFileStream* cfs = stream();
1507 u2 index = 0; // index in the array with long/double occupying two slots
1508 u4 i1 = *u1_index;
1509 u4 i2 = *u2_index + 1;
1510 for(int i = 0; i < array_length; i++) {
1511 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1512 index++;
1513 if (tag == ITEM_Long || tag == ITEM_Double) {
1514 index++;
1515 } else if (tag == ITEM_Object) {
1516 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1517 guarantee_property(valid_klass_reference_at(class_index),
1518 "Bad class index %u in StackMap in class file %s",
1519 class_index, CHECK);
1520 } else if (tag == ITEM_Uninitialized) {
1521 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1522 guarantee_property(
1523 offset < code_length,
1524 "Bad uninitialized type offset %u in StackMap in class file %s",
1525 offset, CHECK);
1526 } else {
1527 guarantee_property(
1528 tag <= (u1)ITEM_Uninitialized,
1529 "Unknown variable type %u in StackMap in class file %s",
1530 tag, CHECK);
1531 }
1532 }
1533 u2_array[*u2_index] = index;
1534 *u1_index = i1;
1535 *u2_index = i2;
1536 }
1537
1538 u1* ClassFileParser::parse_stackmap_table(
1539 u4 code_attribute_length, TRAPS) {
1540 if (code_attribute_length == 0)
1541 return NULL;
1542
1543 ClassFileStream* cfs = stream();
1544 u1* stackmap_table_start = cfs->get_u1_buffer();
1545 assert(stackmap_table_start != NULL, "null stackmap table");
1546
1547 // check code_attribute_length first
1548 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1549
1550 if (!_need_verify && !DumpSharedSpaces) {
1551 return NULL;
1552 }
1553 return stackmap_table_start;
1554 }
1555
1556 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1557 u4 method_attribute_length,
1558 TRAPS) {
1559 ClassFileStream* cfs = stream();
1560 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1561 *checked_exceptions_length = cfs->get_u2_fast();
1562 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1563 u2* checked_exceptions_start = cfs->get_u2_buffer();
1564 assert(checked_exceptions_start != NULL, "null checked exceptions");
1565 if (!_need_verify) {
1566 cfs->skip_u2_fast(size);
1567 } else {
1568 // Verify each value in the checked exception table
1569 u2 checked_exception;
1570 u2 len = *checked_exceptions_length;
1571 cfs->guarantee_more(2 * len, CHECK_NULL);
1572 for (int i = 0; i < len; i++) {
1573 checked_exception = cfs->get_u2_fast();
1574 check_property(
1575 valid_klass_reference_at(checked_exception),
1576 "Exception name has bad type at constant pool %u in class file %s",
1577 checked_exception, CHECK_NULL);
1578 }
1579 }
1580 // check exceptions attribute length
1581 if (_need_verify) {
1582 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1583 sizeof(u2) * size),
1584 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1585 }
1586 return checked_exceptions_start;
1587 }
1588
1589 void ClassFileParser::throwIllegalSignature(
1590 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1591 ResourceMark rm(THREAD);
1592 Exceptions::fthrow(THREAD_AND_LOCATION,
1593 vmSymbols::java_lang_ClassFormatError(),
1594 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1595 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1596 }
1597
1598 // Skip an annotation. Return >=limit if there is any problem.
1599 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
1600 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1601 // value := switch (tag:u1) { ... }
1602 index += 2; // skip atype
1603 if ((index += 2) >= limit) return limit; // read nmem
1604 int nmem = Bytes::get_Java_u2(buffer+index-2);
1605 while (--nmem >= 0 && index < limit) {
1606 index += 2; // skip member
1607 index = skip_annotation_value(buffer, limit, index);
1608 }
1609 return index;
1610 }
1611
1612 // Skip an annotation value. Return >=limit if there is any problem.
1613 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
1614 // value := switch (tag:u1) {
1615 // case B, C, I, S, Z, D, F, J, c: con:u2;
1616 // case e: e_class:u2 e_name:u2;
1617 // case s: s_con:u2;
1618 // case [: do(nval:u2) {value};
1619 // case @: annotation;
1620 // case s: s_con:u2;
1621 // }
1622 if ((index += 1) >= limit) return limit; // read tag
1623 u1 tag = buffer[index-1];
1624 switch (tag) {
1625 case 'B': case 'C': case 'I': case 'S': case 'Z':
1626 case 'D': case 'F': case 'J': case 'c': case 's':
1627 index += 2; // skip con or s_con
1628 break;
1629 case 'e':
1630 index += 4; // skip e_class, e_name
1631 break;
1632 case '[':
1633 {
1634 if ((index += 2) >= limit) return limit; // read nval
1635 int nval = Bytes::get_Java_u2(buffer+index-2);
1636 while (--nval >= 0 && index < limit) {
1637 index = skip_annotation_value(buffer, limit, index);
1638 }
1639 }
1640 break;
1641 case '@':
1642 index = skip_annotation(buffer, limit, index);
1643 break;
1644 default:
1645 return limit; // bad tag byte
1646 }
1647 return index;
1648 }
1649
1650 // Sift through annotations, looking for those significant to the VM:
1651 void ClassFileParser::parse_annotations(u1* buffer, int limit,
1652 ClassFileParser::AnnotationCollector* coll) {
1653 // annotations := do(nann:u2) {annotation}
1654 int index = 0;
1655 if ((index += 2) >= limit) return; // read nann
1656 int nann = Bytes::get_Java_u2(buffer+index-2);
1657 enum { // initial annotation layout
1658 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1659 count_off = 2, // u2 such as 1 (one value)
1660 member_off = 4, // utf8 such as 'value'
1661 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1662 e_tag_val = 'e',
1663 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1664 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1665 e_size = 11, // end of 'e' annotation
1666 c_tag_val = 'c', // payload is type
1667 c_con_off = 7, // utf8 payload, such as 'I'
1668 c_size = 9, // end of 'c' annotation
1669 s_tag_val = 's', // payload is String
1670 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1671 s_size = 9,
1672 min_size = 6 // smallest possible size (zero members)
1673 };
1674 while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
1675 int index0 = index;
1676 index = skip_annotation(buffer, limit, index);
1677 u1* abase = buffer + index0;
1678 int atype = Bytes::get_Java_u2(abase + atype_off);
1679 int count = Bytes::get_Java_u2(abase + count_off);
1680 Symbol* aname = check_symbol_at(_cp, atype);
1681 if (aname == NULL) break; // invalid annotation name
1682 Symbol* member = NULL;
1683 if (count >= 1) {
1684 int member_index = Bytes::get_Java_u2(abase + member_off);
1685 member = check_symbol_at(_cp, member_index);
1686 if (member == NULL) break; // invalid member name
1687 }
1688
1689 // Here is where parsing particular annotations will take place.
1690 AnnotationCollector::ID id = coll->annotation_index(_loader_data, aname);
1691 if (id == AnnotationCollector::_unknown) continue;
1692 coll->set_annotation(id);
1693
1694 if (id == AnnotationCollector::_sun_misc_Contended) {
1695 // @Contended can optionally specify the contention group.
1696 //
1697 // Contended group defines the equivalence class over the fields:
1698 // the fields within the same contended group are not treated distinct.
1699 // The only exception is default group, which does not incur the
1700 // equivalence. Naturally, contention group for classes is meaningless.
1701 //
1702 // While the contention group is specified as String, annotation
1703 // values are already interned, and we might as well use the constant
1704 // pool index as the group tag.
1705 //
1706 u2 group_index = 0; // default contended group
1707 if (count == 1
1708 && s_size == (index - index0) // match size
1709 && s_tag_val == *(abase + tag_off)
1710 && member == vmSymbols::value_name()) {
1711 group_index = Bytes::get_Java_u2(abase + s_con_off);
1712 if (_cp->symbol_at(group_index)->utf8_length() == 0) {
1713 group_index = 0; // default contended group
1714 }
1715 }
1716 coll->set_contended_group(group_index);
1717 }
1718 }
1719 }
1720
1721 ClassFileParser::AnnotationCollector::ID
1722 ClassFileParser::AnnotationCollector::annotation_index(ClassLoaderData* loader_data,
1723 Symbol* name) {
1724 vmSymbols::SID sid = vmSymbols::find_sid(name);
1725 // Privileged code can use all annotations. Other code silently drops some.
1726 const bool privileged = loader_data->is_the_null_class_loader_data() ||
1727 loader_data->is_ext_class_loader_data() ||
1728 loader_data->is_anonymous();
1729 switch (sid) {
1730 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature):
1731 if (_location != _in_method) break; // only allow for methods
1732 if (!privileged) break; // only allow in privileged code
1733 return _method_CallerSensitive;
1734 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
1735 if (_location != _in_method) break; // only allow for methods
1736 if (!privileged) break; // only allow in privileged code
1737 return _method_ForceInline;
1738 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
1739 if (_location != _in_method) break; // only allow for methods
1740 if (!privileged) break; // only allow in privileged code
1741 return _method_DontInline;
1742 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature):
1743 if (_location != _in_method) break; // only allow for methods
1744 if (!privileged) break; // only allow in privileged code
1745 return _method_InjectedProfile;
1746 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
1747 if (_location != _in_method) break; // only allow for methods
1748 if (!privileged) break; // only allow in privileged code
1749 return _method_LambdaForm_Compiled;
1750 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
1751 if (_location != _in_method) break; // only allow for methods
1752 if (!privileged) break; // only allow in privileged code
1753 return _method_LambdaForm_Hidden;
1754 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_Stable_signature):
1755 if (_location != _in_field) break; // only allow for fields
1756 if (!privileged) break; // only allow in privileged code
1757 return _field_Stable;
1758 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_misc_Contended_signature):
1759 if (_location != _in_field && _location != _in_class) break; // only allow for fields and classes
1760 if (!EnableContended || (RestrictContended && !privileged)) break; // honor privileges
1761 return _sun_misc_Contended;
1762 default: break;
1763 }
1764 return AnnotationCollector::_unknown;
1765 }
1766
1767 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1768 if (is_contended())
1769 f->set_contended_group(contended_group());
1770 if (is_stable())
1771 f->set_stable(true);
1772 }
1773
1774 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
1775 // If there's an error deallocate metadata for field annotations
1776 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
1777 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
1778 }
1779
1780 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1781 if (has_annotation(_method_CallerSensitive))
1782 m->set_caller_sensitive(true);
1783 if (has_annotation(_method_ForceInline))
1784 m->set_force_inline(true);
1785 if (has_annotation(_method_DontInline))
1786 m->set_dont_inline(true);
1787 if (has_annotation(_method_InjectedProfile))
1788 m->set_has_injected_profile(true);
1789 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1790 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1791 if (has_annotation(_method_LambdaForm_Hidden))
1792 m->set_hidden(true);
1793 }
1794
1795 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1796 k->set_is_contended(is_contended());
1797 }
1798
1799
1800 #define MAX_ARGS_SIZE 255
1801 #define MAX_CODE_SIZE 65535
1802 #define INITIAL_MAX_LVT_NUMBER 256
1803
1804 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1805 *
1806 * Rules for LVT's and LVTT's are:
1807 * - There can be any number of LVT's and LVTT's.
1808 * - If there are n LVT's, it is the same as if there was just
1809 * one LVT containing all the entries from the n LVT's.
1810 * - There may be no more than one LVT entry per local variable.
1811 * Two LVT entries are 'equal' if these fields are the same:
1812 * start_pc, length, name, slot
1813 * - There may be no more than one LVTT entry per each LVT entry.
1814 * Each LVTT entry has to match some LVT entry.
1815 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
1816 */
1817 void ClassFileParser::copy_localvariable_table(ConstMethod* cm,
1818 int lvt_cnt,
1819 u2* localvariable_table_length,
1820 u2** localvariable_table_start,
1821 int lvtt_cnt,
1822 u2* localvariable_type_table_length,
1823 u2** localvariable_type_table_start,
1824 TRAPS) {
1825
1826 ResourceMark rm(THREAD);
1827
1828 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
1829 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
1830
1831 LVT_HashTable* table = new LVT_HashTable();
1832
1833 // To fill LocalVariableTable in
1834 Classfile_LVT_Element* cf_lvt;
1835 LocalVariableTableElement* lvt = cm->localvariable_table_start();
1836
1837 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
1838 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
1839 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
1840 copy_lvt_element(&cf_lvt[idx], lvt);
1841 // If no duplicates, add LVT elem in hashtable.
1842 if (table->put(*lvt, lvt) == false
1843 && _need_verify
1844 && _major_version >= JAVA_1_5_VERSION) {
1845 classfile_parse_error("Duplicated LocalVariableTable attribute "
1846 "entry for '%s' in class file %s",
1847 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
1848 CHECK);
1849 }
1850 }
1851 }
1852
1853 // To merge LocalVariableTable and LocalVariableTypeTable
1854 Classfile_LVT_Element* cf_lvtt;
1855 LocalVariableTableElement lvtt_elem;
1856
1857 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
1858 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
1859 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
1860 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
1861 LocalVariableTableElement** entry = table->get(lvtt_elem);
1862 if (entry == NULL) {
1863 if (_need_verify) {
1864 classfile_parse_error("LVTT entry for '%s' in class file %s "
1865 "does not match any LVT entry",
1866 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1867 CHECK);
1868 }
1869 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
1870 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
1871 "entry for '%s' in class file %s",
1872 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1873 CHECK);
1874 } else {
1875 // to add generic signatures into LocalVariableTable
1876 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
1877 }
1878 }
1879 }
1880 }
1881
1882
1883 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
1884 u1* runtime_visible_annotations,
1885 int runtime_visible_annotations_length,
1886 u1* runtime_invisible_annotations,
1887 int runtime_invisible_annotations_length,
1888 u1* runtime_visible_parameter_annotations,
1889 int runtime_visible_parameter_annotations_length,
1890 u1* runtime_invisible_parameter_annotations,
1891 int runtime_invisible_parameter_annotations_length,
1892 u1* runtime_visible_type_annotations,
1893 int runtime_visible_type_annotations_length,
1894 u1* runtime_invisible_type_annotations,
1895 int runtime_invisible_type_annotations_length,
1896 u1* annotation_default,
1897 int annotation_default_length,
1898 TRAPS) {
1899
1900 AnnotationArray* a;
1901
1902 if (runtime_visible_annotations_length +
1903 runtime_invisible_annotations_length > 0) {
1904 a = assemble_annotations(runtime_visible_annotations,
1905 runtime_visible_annotations_length,
1906 runtime_invisible_annotations,
1907 runtime_invisible_annotations_length,
1908 CHECK);
1909 cm->set_method_annotations(a);
1910 }
1911
1912 if (runtime_visible_parameter_annotations_length +
1913 runtime_invisible_parameter_annotations_length > 0) {
1914 a = assemble_annotations(runtime_visible_parameter_annotations,
1915 runtime_visible_parameter_annotations_length,
1916 runtime_invisible_parameter_annotations,
1917 runtime_invisible_parameter_annotations_length,
1918 CHECK);
1919 cm->set_parameter_annotations(a);
1920 }
1921
1922 if (annotation_default_length > 0) {
1923 a = assemble_annotations(annotation_default,
1924 annotation_default_length,
1925 NULL,
1926 0,
1927 CHECK);
1928 cm->set_default_annotations(a);
1929 }
1930
1931 if (runtime_visible_type_annotations_length +
1932 runtime_invisible_type_annotations_length > 0) {
1933 a = assemble_annotations(runtime_visible_type_annotations,
1934 runtime_visible_type_annotations_length,
1935 runtime_invisible_type_annotations,
1936 runtime_invisible_type_annotations_length,
1937 CHECK);
1938 cm->set_type_annotations(a);
1939 }
1940 }
1941
1942
1943 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1944 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
1945 // Method* to save footprint, so we only know the size of the resulting Method* when the
1946 // entire method attribute is parsed.
1947 //
1948 // The promoted_flags parameter is used to pass relevant access_flags
1949 // from the method back up to the containing klass. These flag values
1950 // are added to klass's access_flags.
1951
1952 methodHandle ClassFileParser::parse_method(bool is_interface,
1953 AccessFlags *promoted_flags,
1954 TRAPS) {
1955 ClassFileStream* cfs = stream();
1956 methodHandle nullHandle;
1957 ResourceMark rm(THREAD);
1958 // Parse fixed parts
1959 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1960
1961 int flags = cfs->get_u2_fast();
1962 u2 name_index = cfs->get_u2_fast();
1963 int cp_size = _cp->length();
1964 check_property(
1965 valid_symbol_at(name_index),
1966 "Illegal constant pool index %u for method name in class file %s",
1967 name_index, CHECK_(nullHandle));
1968 Symbol* name = _cp->symbol_at(name_index);
1969 verify_legal_method_name(name, CHECK_(nullHandle));
1970
1971 u2 signature_index = cfs->get_u2_fast();
1972 guarantee_property(
1973 valid_symbol_at(signature_index),
1974 "Illegal constant pool index %u for method signature in class file %s",
1975 signature_index, CHECK_(nullHandle));
1976 Symbol* signature = _cp->symbol_at(signature_index);
1977
1978 AccessFlags access_flags;
1979 if (name == vmSymbols::class_initializer_name()) {
1980 // We ignore the other access flags for a valid class initializer.
1981 // (JVM Spec 2nd ed., chapter 4.6)
1982 if (_major_version < 51) { // backward compatibility
1983 flags = JVM_ACC_STATIC;
1984 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1985 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1986 }
1987 } else {
1988 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1989 }
1990
1991 int args_size = -1; // only used when _need_verify is true
1992 if (_need_verify) {
1993 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1994 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1995 if (args_size > MAX_ARGS_SIZE) {
1996 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1997 }
1998 }
1999
2000 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2001
2002 // Default values for code and exceptions attribute elements
2003 u2 max_stack = 0;
2004 u2 max_locals = 0;
2005 u4 code_length = 0;
2006 u1* code_start = 0;
2007 u2 exception_table_length = 0;
2008 u2* exception_table_start = NULL;
2009 Array<int>* exception_handlers = Universe::the_empty_int_array();
2010 u2 checked_exceptions_length = 0;
2011 u2* checked_exceptions_start = NULL;
2012 CompressedLineNumberWriteStream* linenumber_table = NULL;
2013 int linenumber_table_length = 0;
2014 int total_lvt_length = 0;
2015 u2 lvt_cnt = 0;
2016 u2 lvtt_cnt = 0;
2017 bool lvt_allocated = false;
2018 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2019 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2020 u2* localvariable_table_length;
2021 u2** localvariable_table_start;
2022 u2* localvariable_type_table_length;
2023 u2** localvariable_type_table_start;
2024 int method_parameters_length = -1;
2025 u1* method_parameters_data = NULL;
2026 bool method_parameters_seen = false;
2027 bool parsed_code_attribute = false;
2028 bool parsed_checked_exceptions_attribute = false;
2029 bool parsed_stackmap_attribute = false;
2030 // stackmap attribute - JDK1.5
2031 u1* stackmap_data = NULL;
2032 int stackmap_data_length = 0;
2033 u2 generic_signature_index = 0;
2034 MethodAnnotationCollector parsed_annotations;
2035 u1* runtime_visible_annotations = NULL;
2036 int runtime_visible_annotations_length = 0;
2037 u1* runtime_invisible_annotations = NULL;
2038 int runtime_invisible_annotations_length = 0;
2039 u1* runtime_visible_parameter_annotations = NULL;
2040 int runtime_visible_parameter_annotations_length = 0;
2041 u1* runtime_invisible_parameter_annotations = NULL;
2042 int runtime_invisible_parameter_annotations_length = 0;
2043 u1* runtime_visible_type_annotations = NULL;
2044 int runtime_visible_type_annotations_length = 0;
2045 u1* runtime_invisible_type_annotations = NULL;
2046 int runtime_invisible_type_annotations_length = 0;
2047 bool runtime_invisible_annotations_exists = false;
2048 bool runtime_invisible_type_annotations_exists = false;
2049 bool runtime_invisible_parameter_annotations_exists = false;
2050 u1* annotation_default = NULL;
2051 int annotation_default_length = 0;
2052
2053 // Parse code and exceptions attribute
2054 u2 method_attributes_count = cfs->get_u2_fast();
2055 while (method_attributes_count--) {
2056 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
2057 u2 method_attribute_name_index = cfs->get_u2_fast();
2058 u4 method_attribute_length = cfs->get_u4_fast();
2059 check_property(
2060 valid_symbol_at(method_attribute_name_index),
2061 "Invalid method attribute name index %u in class file %s",
2062 method_attribute_name_index, CHECK_(nullHandle));
2063
2064 Symbol* method_attribute_name = _cp->symbol_at(method_attribute_name_index);
2065 if (method_attribute_name == vmSymbols::tag_code()) {
2066 // Parse Code attribute
2067 if (_need_verify) {
2068 guarantee_property(
2069 !access_flags.is_native() && !access_flags.is_abstract(),
2070 "Code attribute in native or abstract methods in class file %s",
2071 CHECK_(nullHandle));
2072 }
2073 if (parsed_code_attribute) {
2074 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
2075 }
2076 parsed_code_attribute = true;
2077
2078 // Stack size, locals size, and code size
2079 if (_major_version == 45 && _minor_version <= 2) {
2080 cfs->guarantee_more(4, CHECK_(nullHandle));
2081 max_stack = cfs->get_u1_fast();
2082 max_locals = cfs->get_u1_fast();
2083 code_length = cfs->get_u2_fast();
2084 } else {
2085 cfs->guarantee_more(8, CHECK_(nullHandle));
2086 max_stack = cfs->get_u2_fast();
2087 max_locals = cfs->get_u2_fast();
2088 code_length = cfs->get_u4_fast();
2089 }
2090 if (_need_verify) {
2091 guarantee_property(args_size <= max_locals,
2092 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
2093 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2094 "Invalid method Code length %u in class file %s",
2095 code_length, CHECK_(nullHandle));
2096 }
2097 // Code pointer
2098 code_start = cfs->get_u1_buffer();
2099 assert(code_start != NULL, "null code start");
2100 cfs->guarantee_more(code_length, CHECK_(nullHandle));
2101 cfs->skip_u1_fast(code_length);
2102
2103 // Exception handler table
2104 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
2105 exception_table_length = cfs->get_u2_fast();
2106 if (exception_table_length > 0) {
2107 exception_table_start =
2108 parse_exception_table(code_length, exception_table_length, CHECK_(nullHandle));
2109 }
2110
2111 // Parse additional attributes in code attribute
2112 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
2113 u2 code_attributes_count = cfs->get_u2_fast();
2114
2115 unsigned int calculated_attribute_length = 0;
2116
2117 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2118 calculated_attribute_length =
2119 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2120 } else {
2121 // max_stack, locals and length are smaller in pre-version 45.2 classes
2122 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2123 }
2124 calculated_attribute_length +=
2125 code_length +
2126 sizeof(exception_table_length) +
2127 sizeof(code_attributes_count) +
2128 exception_table_length *
2129 ( sizeof(u2) + // start_pc
2130 sizeof(u2) + // end_pc
2131 sizeof(u2) + // handler_pc
2132 sizeof(u2) ); // catch_type_index
2133
2134 while (code_attributes_count--) {
2135 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
2136 u2 code_attribute_name_index = cfs->get_u2_fast();
2137 u4 code_attribute_length = cfs->get_u4_fast();
2138 calculated_attribute_length += code_attribute_length +
2139 sizeof(code_attribute_name_index) +
2140 sizeof(code_attribute_length);
2141 check_property(valid_symbol_at(code_attribute_name_index),
2142 "Invalid code attribute name index %u in class file %s",
2143 code_attribute_name_index,
2144 CHECK_(nullHandle));
2145 if (LoadLineNumberTables &&
2146 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2147 // Parse and compress line number table
2148 parse_linenumber_table(code_attribute_length, code_length,
2149 &linenumber_table, CHECK_(nullHandle));
2150
2151 } else if (LoadLocalVariableTables &&
2152 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2153 // Parse local variable table
2154 if (!lvt_allocated) {
2155 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2156 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2157 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2158 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2159 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2160 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2161 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2162 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2163 lvt_allocated = true;
2164 }
2165 if (lvt_cnt == max_lvt_cnt) {
2166 max_lvt_cnt <<= 1;
2167 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2168 localvariable_table_start = REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2169 }
2170 localvariable_table_start[lvt_cnt] =
2171 parse_localvariable_table(code_length,
2172 max_locals,
2173 code_attribute_length,
2174 &localvariable_table_length[lvt_cnt],
2175 false, // is not LVTT
2176 CHECK_(nullHandle));
2177 total_lvt_length += localvariable_table_length[lvt_cnt];
2178 lvt_cnt++;
2179 } else if (LoadLocalVariableTypeTables &&
2180 _major_version >= JAVA_1_5_VERSION &&
2181 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2182 if (!lvt_allocated) {
2183 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2184 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2185 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2186 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2187 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2188 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2189 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2190 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2191 lvt_allocated = true;
2192 }
2193 // Parse local variable type table
2194 if (lvtt_cnt == max_lvtt_cnt) {
2195 max_lvtt_cnt <<= 1;
2196 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2197 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2198 }
2199 localvariable_type_table_start[lvtt_cnt] =
2200 parse_localvariable_table(code_length,
2201 max_locals,
2202 code_attribute_length,
2203 &localvariable_type_table_length[lvtt_cnt],
2204 true, // is LVTT
2205 CHECK_(nullHandle));
2206 lvtt_cnt++;
2207 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2208 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2209 // Stack map is only needed by the new verifier in JDK1.5.
2210 if (parsed_stackmap_attribute) {
2211 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2212 }
2213 stackmap_data = parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
2214 stackmap_data_length = code_attribute_length;
2215 parsed_stackmap_attribute = true;
2216 } else {
2217 // Skip unknown attributes
2218 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2219 }
2220 }
2221 // check method attribute length
2222 if (_need_verify) {
2223 guarantee_property(method_attribute_length == calculated_attribute_length,
2224 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2225 }
2226 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2227 // Parse Exceptions attribute
2228 if (parsed_checked_exceptions_attribute) {
2229 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2230 }
2231 parsed_checked_exceptions_attribute = true;
2232 checked_exceptions_start =
2233 parse_checked_exceptions(&checked_exceptions_length,
2234 method_attribute_length,
2235 CHECK_(nullHandle));
2236 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2237 // reject multiple method parameters
2238 if (method_parameters_seen) {
2239 classfile_parse_error("Multiple MethodParameters attributes in class file %s", CHECK_(nullHandle));
2240 }
2241 method_parameters_seen = true;
2242 method_parameters_length = cfs->get_u1_fast();
2243 const u2 real_length = (method_parameters_length * 4u) + 1u;
2244 if (method_attribute_length != real_length) {
2245 classfile_parse_error(
2246 "Invalid MethodParameters method attribute length %u in class file",
2247 method_attribute_length, CHECK_(nullHandle));
2248 }
2249 method_parameters_data = cfs->get_u1_buffer();
2250 cfs->skip_u2_fast(method_parameters_length);
2251 cfs->skip_u2_fast(method_parameters_length);
2252 // ignore this attribute if it cannot be reflected
2253 if (!SystemDictionary::Parameter_klass_loaded())
2254 method_parameters_length = -1;
2255 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2256 if (method_attribute_length != 0) {
2257 classfile_parse_error(
2258 "Invalid Synthetic method attribute length %u in class file %s",
2259 method_attribute_length, CHECK_(nullHandle));
2260 }
2261 // Should we check that there hasn't already been a synthetic attribute?
2262 access_flags.set_is_synthetic();
2263 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2264 if (method_attribute_length != 0) {
2265 classfile_parse_error(
2266 "Invalid Deprecated method attribute length %u in class file %s",
2267 method_attribute_length, CHECK_(nullHandle));
2268 }
2269 } else if (_major_version >= JAVA_1_5_VERSION) {
2270 if (method_attribute_name == vmSymbols::tag_signature()) {
2271 if (method_attribute_length != 2) {
2272 classfile_parse_error(
2273 "Invalid Signature attribute length %u in class file %s",
2274 method_attribute_length, CHECK_(nullHandle));
2275 }
2276 generic_signature_index = parse_generic_signature_attribute(CHECK_(nullHandle));
2277 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2278 if (runtime_visible_annotations != NULL) {
2279 classfile_parse_error(
2280 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2281 }
2282 runtime_visible_annotations_length = method_attribute_length;
2283 runtime_visible_annotations = cfs->get_u1_buffer();
2284 assert(runtime_visible_annotations != NULL, "null visible annotations");
2285 parse_annotations(runtime_visible_annotations,
2286 runtime_visible_annotations_length, &parsed_annotations);
2287 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2288 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2289 if (runtime_invisible_annotations_exists) {
2290 classfile_parse_error(
2291 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2292 }
2293 runtime_invisible_annotations_exists = true;
2294 if (PreserveAllAnnotations) {
2295 runtime_invisible_annotations_length = method_attribute_length;
2296 runtime_invisible_annotations = cfs->get_u1_buffer();
2297 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2298 }
2299 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2300 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2301 if (runtime_visible_parameter_annotations != NULL) {
2302 classfile_parse_error(
2303 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2304 }
2305 runtime_visible_parameter_annotations_length = method_attribute_length;
2306 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2307 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2308 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2309 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2310 if (runtime_invisible_parameter_annotations_exists) {
2311 classfile_parse_error(
2312 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2313 }
2314 runtime_invisible_parameter_annotations_exists = true;
2315 if (PreserveAllAnnotations) {
2316 runtime_invisible_parameter_annotations_length = method_attribute_length;
2317 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2318 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2319 }
2320 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2321 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2322 if (annotation_default != NULL) {
2323 classfile_parse_error(
2324 "Multiple AnnotationDefault attributes for method in class file %s",
2325 CHECK_(nullHandle));
2326 }
2327 annotation_default_length = method_attribute_length;
2328 annotation_default = cfs->get_u1_buffer();
2329 assert(annotation_default != NULL, "null annotation default");
2330 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2331 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2332 if (runtime_visible_type_annotations != NULL) {
2333 classfile_parse_error(
2334 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2335 CHECK_(nullHandle));
2336 }
2337 runtime_visible_type_annotations_length = method_attribute_length;
2338 runtime_visible_type_annotations = cfs->get_u1_buffer();
2339 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2340 // No need for the VM to parse Type annotations
2341 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_(nullHandle));
2342 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2343 if (runtime_invisible_type_annotations_exists) {
2344 classfile_parse_error(
2345 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2346 CHECK_(nullHandle));
2347 } else {
2348 runtime_invisible_type_annotations_exists = true;
2349 }
2350 if (PreserveAllAnnotations) {
2351 runtime_invisible_type_annotations_length = method_attribute_length;
2352 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2353 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2354 }
2355 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2356 } else {
2357 // Skip unknown attributes
2358 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2359 }
2360 } else {
2361 // Skip unknown attributes
2362 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2363 }
2364 }
2365
2366 if (linenumber_table != NULL) {
2367 linenumber_table->write_terminator();
2368 linenumber_table_length = linenumber_table->position();
2369 }
2370
2371 // Make sure there's at least one Code attribute in non-native/non-abstract method
2372 if (_need_verify) {
2373 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2374 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2375 }
2376
2377 // All sizing information for a Method* is finally available, now create it
2378 InlineTableSizes sizes(
2379 total_lvt_length,
2380 linenumber_table_length,
2381 exception_table_length,
2382 checked_exceptions_length,
2383 method_parameters_length,
2384 generic_signature_index,
2385 runtime_visible_annotations_length +
2386 runtime_invisible_annotations_length,
2387 runtime_visible_parameter_annotations_length +
2388 runtime_invisible_parameter_annotations_length,
2389 runtime_visible_type_annotations_length +
2390 runtime_invisible_type_annotations_length,
2391 annotation_default_length,
2392 0);
2393
2394 Method* m = Method::allocate(
2395 _loader_data, code_length, access_flags, &sizes,
2396 ConstMethod::NORMAL, CHECK_(nullHandle));
2397
2398 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2399
2400 // Fill in information from fixed part (access_flags already set)
2401 m->set_constants(_cp);
2402 m->set_name_index(name_index);
2403 m->set_signature_index(signature_index);
2404 #ifdef CC_INTERP
2405 // hmm is there a gc issue here??
2406 ResultTypeFinder rtf(_cp->symbol_at(signature_index));
2407 m->set_result_index(rtf.type());
2408 #endif
2409
2410 if (args_size >= 0) {
2411 m->set_size_of_parameters(args_size);
2412 } else {
2413 m->compute_size_of_parameters(THREAD);
2414 }
2415 #ifdef ASSERT
2416 if (args_size >= 0) {
2417 m->compute_size_of_parameters(THREAD);
2418 assert(args_size == m->size_of_parameters(), "");
2419 }
2420 #endif
2421
2422 // Fill in code attribute information
2423 m->set_max_stack(max_stack);
2424 m->set_max_locals(max_locals);
2425 if (stackmap_data != NULL) {
2426 m->constMethod()->copy_stackmap_data(_loader_data, stackmap_data,
2427 stackmap_data_length, CHECK_NULL);
2428 }
2429
2430 // Copy byte codes
2431 m->set_code(code_start);
2432
2433 // Copy line number table
2434 if (linenumber_table != NULL) {
2435 memcpy(m->compressed_linenumber_table(),
2436 linenumber_table->buffer(), linenumber_table_length);
2437 }
2438
2439 // Copy exception table
2440 if (exception_table_length > 0) {
2441 int size =
2442 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2443 copy_u2_with_conversion((u2*) m->exception_table_start(),
2444 exception_table_start, size);
2445 }
2446
2447 // Copy method parameters
2448 if (method_parameters_length > 0) {
2449 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2450 for (int i = 0; i < method_parameters_length; i++) {
2451 elem[i].name_cp_index = Bytes::get_Java_u2(method_parameters_data);
2452 method_parameters_data += 2;
2453 elem[i].flags = Bytes::get_Java_u2(method_parameters_data);
2454 method_parameters_data += 2;
2455 }
2456 }
2457
2458 // Copy checked exceptions
2459 if (checked_exceptions_length > 0) {
2460 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2461 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2462 }
2463
2464 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2465 if (total_lvt_length > 0) {
2466 promoted_flags->set_has_localvariable_table();
2467 copy_localvariable_table(m->constMethod(), lvt_cnt,
2468 localvariable_table_length,
2469 localvariable_table_start,
2470 lvtt_cnt,
2471 localvariable_type_table_length,
2472 localvariable_type_table_start, CHECK_NULL);
2473 }
2474
2475 if (parsed_annotations.has_any_annotations())
2476 parsed_annotations.apply_to(m);
2477
2478 // Copy annotations
2479 copy_method_annotations(m->constMethod(),
2480 runtime_visible_annotations,
2481 runtime_visible_annotations_length,
2482 runtime_invisible_annotations,
2483 runtime_invisible_annotations_length,
2484 runtime_visible_parameter_annotations,
2485 runtime_visible_parameter_annotations_length,
2486 runtime_invisible_parameter_annotations,
2487 runtime_invisible_parameter_annotations_length,
2488 runtime_visible_type_annotations,
2489 runtime_visible_type_annotations_length,
2490 runtime_invisible_type_annotations,
2491 runtime_invisible_type_annotations_length,
2492 annotation_default,
2493 annotation_default_length,
2494 CHECK_NULL);
2495
2496 if (name == vmSymbols::finalize_method_name() &&
2497 signature == vmSymbols::void_method_signature()) {
2498 if (m->is_empty_method()) {
2499 _has_empty_finalizer = true;
2500 } else {
2501 _has_finalizer = true;
2502 }
2503 }
2504 if (name == vmSymbols::object_initializer_name() &&
2505 signature == vmSymbols::void_method_signature() &&
2506 m->is_vanilla_constructor()) {
2507 _has_vanilla_constructor = true;
2508 }
2509
2510 NOT_PRODUCT(m->verify());
2511 return m;
2512 }
2513
2514
2515 // The promoted_flags parameter is used to pass relevant access_flags
2516 // from the methods back up to the containing klass. These flag values
2517 // are added to klass's access_flags.
2518
2519 Array<Method*>* ClassFileParser::parse_methods(bool is_interface,
2520 AccessFlags* promoted_flags,
2521 bool* has_final_method,
2522 bool* declares_default_methods,
2523 TRAPS) {
2524 ClassFileStream* cfs = stream();
2525 cfs->guarantee_more(2, CHECK_NULL); // length
2526 u2 length = cfs->get_u2_fast();
2527 if (length == 0) {
2528 _methods = Universe::the_empty_method_array();
2529 } else {
2530 _methods = MetadataFactory::new_array<Method*>(_loader_data, length, NULL, CHECK_NULL);
2531
2532 HandleMark hm(THREAD);
2533 for (int index = 0; index < length; index++) {
2534 methodHandle method = parse_method(is_interface,
2535 promoted_flags,
2536 CHECK_NULL);
2537
2538 if (method->is_final()) {
2539 *has_final_method = true;
2540 }
2541 // declares_default_methods: declares concrete instance methods, any access flags
2542 // used for interface initialization, and default method inheritance analysis
2543 if (is_interface && !(*declares_default_methods)
2544 && !method->is_abstract() && !method->is_static()) {
2545 *declares_default_methods = true;
2546 }
2547 _methods->at_put(index, method());
2548 }
2549
2550 if (_need_verify && length > 1) {
2551 // Check duplicated methods
2552 ResourceMark rm(THREAD);
2553 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2554 THREAD, NameSigHash*, HASH_ROW_SIZE);
2555 initialize_hashtable(names_and_sigs);
2556 bool dup = false;
2557 {
2558 debug_only(No_Safepoint_Verifier nsv;)
2559 for (int i = 0; i < length; i++) {
2560 Method* m = _methods->at(i);
2561 // If no duplicates, add name/signature in hashtable names_and_sigs.
2562 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2563 dup = true;
2564 break;
2565 }
2566 }
2567 }
2568 if (dup) {
2569 classfile_parse_error("Duplicate method name&signature in class file %s",
2570 CHECK_NULL);
2571 }
2572 }
2573 }
2574 return _methods;
2575 }
2576
2577
2578 intArray* ClassFileParser::sort_methods(Array<Method*>* methods) {
2579 int length = methods->length();
2580 // If JVMTI original method ordering or sharing is enabled we have to
2581 // remember the original class file ordering.
2582 // We temporarily use the vtable_index field in the Method* to store the
2583 // class file index, so we can read in after calling qsort.
2584 // Put the method ordering in the shared archive.
2585 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2586 for (int index = 0; index < length; index++) {
2587 Method* m = methods->at(index);
2588 assert(!m->valid_vtable_index(), "vtable index should not be set");
2589 m->set_vtable_index(index);
2590 }
2591 }
2592 // Sort method array by ascending method name (for faster lookups & vtable construction)
2593 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2594 Method::sort_methods(methods);
2595
2596 intArray* method_ordering = NULL;
2597 // If JVMTI original method ordering or sharing is enabled construct int
2598 // array remembering the original ordering
2599 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2600 method_ordering = new intArray(length);
2601 for (int index = 0; index < length; index++) {
2602 Method* m = methods->at(index);
2603 int old_index = m->vtable_index();
2604 assert(old_index >= 0 && old_index < length, "invalid method index");
2605 method_ordering->at_put(index, old_index);
2606 m->set_vtable_index(Method::invalid_vtable_index);
2607 }
2608 }
2609 return method_ordering;
2610 }
2611
2612 // Parse generic_signature attribute for methods and fields
2613 u2 ClassFileParser::parse_generic_signature_attribute(TRAPS) {
2614 ClassFileStream* cfs = stream();
2615 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2616 u2 generic_signature_index = cfs->get_u2_fast();
2617 check_property(
2618 valid_symbol_at(generic_signature_index),
2619 "Invalid Signature attribute at constant pool index %u in class file %s",
2620 generic_signature_index, CHECK_0);
2621 return generic_signature_index;
2622 }
2623
2624 void ClassFileParser::parse_classfile_sourcefile_attribute(TRAPS) {
2625 ClassFileStream* cfs = stream();
2626 cfs->guarantee_more(2, CHECK); // sourcefile_index
2627 u2 sourcefile_index = cfs->get_u2_fast();
2628 check_property(
2629 valid_symbol_at(sourcefile_index),
2630 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2631 sourcefile_index, CHECK);
2632 set_class_sourcefile_index(sourcefile_index);
2633 }
2634
2635
2636
2637 void ClassFileParser::parse_classfile_source_debug_extension_attribute(int length, TRAPS) {
2638 ClassFileStream* cfs = stream();
2639 u1* sde_buffer = cfs->get_u1_buffer();
2640 assert(sde_buffer != NULL, "null sde buffer");
2641
2642 // Don't bother storing it if there is no way to retrieve it
2643 if (JvmtiExport::can_get_source_debug_extension()) {
2644 assert((length+1) > length, "Overflow checking");
2645 u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2646 for (int i = 0; i < length; i++) {
2647 sde[i] = sde_buffer[i];
2648 }
2649 sde[length] = '\0';
2650 set_class_sde_buffer((char*)sde, length);
2651 }
2652 // Got utf8 string, set stream position forward
2653 cfs->skip_u1(length, CHECK);
2654 }
2655
2656
2657 // Inner classes can be static, private or protected (classic VM does this)
2658 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2659
2660 // Return number of classes in the inner classes attribute table
2661 u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start,
2662 bool parsed_enclosingmethod_attribute,
2663 u2 enclosing_method_class_index,
2664 u2 enclosing_method_method_index,
2665 TRAPS) {
2666 ClassFileStream* cfs = stream();
2667 u1* current_mark = cfs->current();
2668 u2 length = 0;
2669 if (inner_classes_attribute_start != NULL) {
2670 cfs->set_current(inner_classes_attribute_start);
2671 cfs->guarantee_more(2, CHECK_0); // length
2672 length = cfs->get_u2_fast();
2673 }
2674
2675 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2676 // method data:
2677 // [inner_class_info_index,
2678 // outer_class_info_index,
2679 // inner_name_index,
2680 // inner_class_access_flags,
2681 // ...
2682 // enclosing_method_class_index,
2683 // enclosing_method_method_index]
2684 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2685 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
2686 _inner_classes = inner_classes;
2687
2688 int index = 0;
2689 int cp_size = _cp->length();
2690 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2691 for (int n = 0; n < length; n++) {
2692 // Inner class index
2693 u2 inner_class_info_index = cfs->get_u2_fast();
2694 check_property(
2695 inner_class_info_index == 0 ||
2696 valid_klass_reference_at(inner_class_info_index),
2697 "inner_class_info_index %u has bad constant type in class file %s",
2698 inner_class_info_index, CHECK_0);
2699 // Outer class index
2700 u2 outer_class_info_index = cfs->get_u2_fast();
2701 check_property(
2702 outer_class_info_index == 0 ||
2703 valid_klass_reference_at(outer_class_info_index),
2704 "outer_class_info_index %u has bad constant type in class file %s",
2705 outer_class_info_index, CHECK_0);
2706 // Inner class name
2707 u2 inner_name_index = cfs->get_u2_fast();
2708 check_property(
2709 inner_name_index == 0 || valid_symbol_at(inner_name_index),
2710 "inner_name_index %u has bad constant type in class file %s",
2711 inner_name_index, CHECK_0);
2712 if (_need_verify) {
2713 guarantee_property(inner_class_info_index != outer_class_info_index,
2714 "Class is both outer and inner class in class file %s", CHECK_0);
2715 }
2716 // Access flags
2717 AccessFlags inner_access_flags;
2718 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2719 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2720 // Set abstract bit for old class files for backward compatibility
2721 flags |= JVM_ACC_ABSTRACT;
2722 }
2723 verify_legal_class_modifiers(flags, CHECK_0);
2724 inner_access_flags.set_flags(flags);
2725
2726 inner_classes->at_put(index++, inner_class_info_index);
2727 inner_classes->at_put(index++, outer_class_info_index);
2728 inner_classes->at_put(index++, inner_name_index);
2729 inner_classes->at_put(index++, inner_access_flags.as_short());
2730 }
2731
2732 // 4347400: make sure there's no duplicate entry in the classes array
2733 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2734 for(int i = 0; i < length * 4; i += 4) {
2735 for(int j = i + 4; j < length * 4; j += 4) {
2736 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
2737 inner_classes->at(i+1) != inner_classes->at(j+1) ||
2738 inner_classes->at(i+2) != inner_classes->at(j+2) ||
2739 inner_classes->at(i+3) != inner_classes->at(j+3)),
2740 "Duplicate entry in InnerClasses in class file %s",
2741 CHECK_0);
2742 }
2743 }
2744 }
2745
2746 // Set EnclosingMethod class and method indexes.
2747 if (parsed_enclosingmethod_attribute) {
2748 inner_classes->at_put(index++, enclosing_method_class_index);
2749 inner_classes->at_put(index++, enclosing_method_method_index);
2750 }
2751 assert(index == size, "wrong size");
2752
2753 // Restore buffer's current position.
2754 cfs->set_current(current_mark);
2755
2756 return length;
2757 }
2758
2759 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
2760 set_class_synthetic_flag(true);
2761 }
2762
2763 void ClassFileParser::parse_classfile_signature_attribute(TRAPS) {
2764 ClassFileStream* cfs = stream();
2765 u2 signature_index = cfs->get_u2(CHECK);
2766 check_property(
2767 valid_symbol_at(signature_index),
2768 "Invalid constant pool index %u in Signature attribute in class file %s",
2769 signature_index, CHECK);
2770 set_class_generic_signature_index(signature_index);
2771 }
2772
2773 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(u4 attribute_byte_length, TRAPS) {
2774 ClassFileStream* cfs = stream();
2775 u1* current_start = cfs->current();
2776
2777 guarantee_property(attribute_byte_length >= sizeof(u2),
2778 "Invalid BootstrapMethods attribute length %u in class file %s",
2779 attribute_byte_length,
2780 CHECK);
2781
2782 cfs->guarantee_more(attribute_byte_length, CHECK);
2783
2784 int attribute_array_length = cfs->get_u2_fast();
2785
2786 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2787 "Short length on BootstrapMethods in class file %s",
2788 CHECK);
2789
2790
2791 // The attribute contains a counted array of counted tuples of shorts,
2792 // represending bootstrap specifiers:
2793 // length*{bootstrap_method_index, argument_count*{argument_index}}
2794 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2795 // operand_count = number of shorts in attr, except for leading length
2796
2797 // The attribute is copied into a short[] array.
2798 // The array begins with a series of short[2] pairs, one for each tuple.
2799 int index_size = (attribute_array_length * 2);
2800
2801 Array<u2>* operands = MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
2802
2803 // Eagerly assign operands so they will be deallocated with the constant
2804 // pool if there is an error.
2805 _cp->set_operands(operands);
2806
2807 int operand_fill_index = index_size;
2808 int cp_size = _cp->length();
2809
2810 for (int n = 0; n < attribute_array_length; n++) {
2811 // Store a 32-bit offset into the header of the operand array.
2812 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
2813
2814 // Read a bootstrap specifier.
2815 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2816 u2 bootstrap_method_index = cfs->get_u2_fast();
2817 u2 argument_count = cfs->get_u2_fast();
2818 check_property(
2819 valid_cp_range(bootstrap_method_index, cp_size) &&
2820 _cp->tag_at(bootstrap_method_index).is_method_handle(),
2821 "bootstrap_method_index %u has bad constant type in class file %s",
2822 bootstrap_method_index,
2823 CHECK);
2824
2825 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
2826 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
2827 CHECK);
2828
2829 operands->at_put(operand_fill_index++, bootstrap_method_index);
2830 operands->at_put(operand_fill_index++, argument_count);
2831
2832 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2833 for (int j = 0; j < argument_count; j++) {
2834 u2 argument_index = cfs->get_u2_fast();
2835 check_property(
2836 valid_cp_range(argument_index, cp_size) &&
2837 _cp->tag_at(argument_index).is_loadable_constant(),
2838 "argument_index %u has bad constant type in class file %s",
2839 argument_index,
2840 CHECK);
2841 operands->at_put(operand_fill_index++, argument_index);
2842 }
2843 }
2844
2845 u1* current_end = cfs->current();
2846 guarantee_property(current_end == current_start + attribute_byte_length,
2847 "Bad length on BootstrapMethods in class file %s",
2848 CHECK);
2849 }
2850
2851 void ClassFileParser::parse_classfile_attributes(ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2852 TRAPS) {
2853 ClassFileStream* cfs = stream();
2854 // Set inner classes attribute to default sentinel
2855 _inner_classes = Universe::the_empty_short_array();
2856 cfs->guarantee_more(2, CHECK); // attributes_count
2857 u2 attributes_count = cfs->get_u2_fast();
2858 bool parsed_sourcefile_attribute = false;
2859 bool parsed_innerclasses_attribute = false;
2860 bool parsed_enclosingmethod_attribute = false;
2861 bool parsed_bootstrap_methods_attribute = false;
2862 u1* runtime_visible_annotations = NULL;
2863 int runtime_visible_annotations_length = 0;
2864 u1* runtime_invisible_annotations = NULL;
2865 int runtime_invisible_annotations_length = 0;
2866 u1* runtime_visible_type_annotations = NULL;
2867 int runtime_visible_type_annotations_length = 0;
2868 u1* runtime_invisible_type_annotations = NULL;
2869 int runtime_invisible_type_annotations_length = 0;
2870 bool runtime_invisible_type_annotations_exists = false;
2871 bool runtime_invisible_annotations_exists = false;
2872 bool parsed_source_debug_ext_annotations_exist = false;
2873 u1* inner_classes_attribute_start = NULL;
2874 u4 inner_classes_attribute_length = 0;
2875 u2 enclosing_method_class_index = 0;
2876 u2 enclosing_method_method_index = 0;
2877 // Iterate over attributes
2878 while (attributes_count--) {
2879 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2880 u2 attribute_name_index = cfs->get_u2_fast();
2881 u4 attribute_length = cfs->get_u4_fast();
2882 check_property(
2883 valid_symbol_at(attribute_name_index),
2884 "Attribute name has bad constant pool index %u in class file %s",
2885 attribute_name_index, CHECK);
2886 Symbol* tag = _cp->symbol_at(attribute_name_index);
2887 if (tag == vmSymbols::tag_source_file()) {
2888 // Check for SourceFile tag
2889 if (_need_verify) {
2890 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2891 }
2892 if (parsed_sourcefile_attribute) {
2893 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2894 } else {
2895 parsed_sourcefile_attribute = true;
2896 }
2897 parse_classfile_sourcefile_attribute(CHECK);
2898 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2899 // Check for SourceDebugExtension tag
2900 if (parsed_source_debug_ext_annotations_exist) {
2901 classfile_parse_error(
2902 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
2903 }
2904 parsed_source_debug_ext_annotations_exist = true;
2905 parse_classfile_source_debug_extension_attribute((int)attribute_length, CHECK);
2906 } else if (tag == vmSymbols::tag_inner_classes()) {
2907 // Check for InnerClasses tag
2908 if (parsed_innerclasses_attribute) {
2909 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2910 } else {
2911 parsed_innerclasses_attribute = true;
2912 }
2913 inner_classes_attribute_start = cfs->get_u1_buffer();
2914 inner_classes_attribute_length = attribute_length;
2915 cfs->skip_u1(inner_classes_attribute_length, CHECK);
2916 } else if (tag == vmSymbols::tag_synthetic()) {
2917 // Check for Synthetic tag
2918 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2919 if (attribute_length != 0) {
2920 classfile_parse_error(
2921 "Invalid Synthetic classfile attribute length %u in class file %s",
2922 attribute_length, CHECK);
2923 }
2924 parse_classfile_synthetic_attribute(CHECK);
2925 } else if (tag == vmSymbols::tag_deprecated()) {
2926 // Check for Deprecatd tag - 4276120
2927 if (attribute_length != 0) {
2928 classfile_parse_error(
2929 "Invalid Deprecated classfile attribute length %u in class file %s",
2930 attribute_length, CHECK);
2931 }
2932 } else if (_major_version >= JAVA_1_5_VERSION) {
2933 if (tag == vmSymbols::tag_signature()) {
2934 if (attribute_length != 2) {
2935 classfile_parse_error(
2936 "Wrong Signature attribute length %u in class file %s",
2937 attribute_length, CHECK);
2938 }
2939 parse_classfile_signature_attribute(CHECK);
2940 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2941 if (runtime_visible_annotations != NULL) {
2942 classfile_parse_error(
2943 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
2944 }
2945 runtime_visible_annotations_length = attribute_length;
2946 runtime_visible_annotations = cfs->get_u1_buffer();
2947 assert(runtime_visible_annotations != NULL, "null visible annotations");
2948 parse_annotations(runtime_visible_annotations,
2949 runtime_visible_annotations_length,
2950 parsed_annotations);
2951 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2952 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
2953 if (runtime_invisible_annotations_exists) {
2954 classfile_parse_error(
2955 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
2956 }
2957 runtime_invisible_annotations_exists = true;
2958 if (PreserveAllAnnotations) {
2959 runtime_invisible_annotations_length = attribute_length;
2960 runtime_invisible_annotations = cfs->get_u1_buffer();
2961 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2962 }
2963 cfs->skip_u1(attribute_length, CHECK);
2964 } else if (tag == vmSymbols::tag_enclosing_method()) {
2965 if (parsed_enclosingmethod_attribute) {
2966 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2967 } else {
2968 parsed_enclosingmethod_attribute = true;
2969 }
2970 guarantee_property(attribute_length == 4,
2971 "Wrong EnclosingMethod attribute length %u in class file %s",
2972 attribute_length, CHECK);
2973 cfs->guarantee_more(4, CHECK); // class_index, method_index
2974 enclosing_method_class_index = cfs->get_u2_fast();
2975 enclosing_method_method_index = cfs->get_u2_fast();
2976 if (enclosing_method_class_index == 0) {
2977 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2978 }
2979 // Validate the constant pool indices and types
2980 check_property(valid_klass_reference_at(enclosing_method_class_index),
2981 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2982 if (enclosing_method_method_index != 0 &&
2983 (!_cp->is_within_bounds(enclosing_method_method_index) ||
2984 !_cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
2985 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2986 }
2987 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2988 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2989 if (parsed_bootstrap_methods_attribute)
2990 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2991 parsed_bootstrap_methods_attribute = true;
2992 parse_classfile_bootstrap_methods_attribute(attribute_length, CHECK);
2993 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
2994 if (runtime_visible_type_annotations != NULL) {
2995 classfile_parse_error(
2996 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
2997 }
2998 runtime_visible_type_annotations_length = attribute_length;
2999 runtime_visible_type_annotations = cfs->get_u1_buffer();
3000 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3001 // No need for the VM to parse Type annotations
3002 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3003 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3004 if (runtime_invisible_type_annotations_exists) {
3005 classfile_parse_error(
3006 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3007 } else {
3008 runtime_invisible_type_annotations_exists = true;
3009 }
3010 if (PreserveAllAnnotations) {
3011 runtime_invisible_type_annotations_length = attribute_length;
3012 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3013 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3014 }
3015 cfs->skip_u1(attribute_length, CHECK);
3016 } else {
3017 // Unknown attribute
3018 cfs->skip_u1(attribute_length, CHECK);
3019 }
3020 } else {
3021 // Unknown attribute
3022 cfs->skip_u1(attribute_length, CHECK);
3023 }
3024 }
3025 _annotations = assemble_annotations(runtime_visible_annotations,
3026 runtime_visible_annotations_length,
3027 runtime_invisible_annotations,
3028 runtime_invisible_annotations_length,
3029 CHECK);
3030 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3031 runtime_visible_type_annotations_length,
3032 runtime_invisible_type_annotations,
3033 runtime_invisible_type_annotations_length,
3034 CHECK);
3035
3036 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3037 u2 num_of_classes = parse_classfile_inner_classes_attribute(
3038 inner_classes_attribute_start,
3039 parsed_innerclasses_attribute,
3040 enclosing_method_class_index,
3041 enclosing_method_method_index,
3042 CHECK);
3043 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3044 guarantee_property(
3045 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3046 "Wrong InnerClasses attribute length in class file %s", CHECK);
3047 }
3048 }
3049
3050 if (_max_bootstrap_specifier_index >= 0) {
3051 guarantee_property(parsed_bootstrap_methods_attribute,
3052 "Missing BootstrapMethods attribute in class file %s", CHECK);
3053 }
3054 }
3055
3056 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
3057 if (_synthetic_flag)
3058 k->set_is_synthetic();
3059 if (_sourcefile_index != 0) {
3060 k->set_source_file_name_index(_sourcefile_index);
3061 }
3062 if (_generic_signature_index != 0) {
3063 k->set_generic_signature_index(_generic_signature_index);
3064 }
3065 if (_sde_buffer != NULL) {
3066 k->set_source_debug_extension(_sde_buffer, _sde_length);
3067 }
3068 }
3069
3070 // Create the Annotations object that will
3071 // hold the annotations array for the Klass.
3072 void ClassFileParser::create_combined_annotations(TRAPS) {
3073 if (_annotations == NULL &&
3074 _type_annotations == NULL &&
3075 _fields_annotations == NULL &&
3076 _fields_type_annotations == NULL) {
3077 // Don't create the Annotations object unnecessarily.
3078 return;
3079 }
3080
3081 Annotations* annotations = Annotations::allocate(_loader_data, CHECK);
3082 annotations->set_class_annotations(_annotations);
3083 annotations->set_class_type_annotations(_type_annotations);
3084 annotations->set_fields_annotations(_fields_annotations);
3085 annotations->set_fields_type_annotations(_fields_type_annotations);
3086
3087 // This is the Annotations object that will be
3088 // assigned to InstanceKlass being constructed.
3089 _combined_annotations = annotations;
3090
3091 // The annotations arrays below has been transfered the
3092 // _combined_annotations so these fields can now be cleared.
3093 _annotations = NULL;
3094 _type_annotations = NULL;
3095 _fields_annotations = NULL;
3096 _fields_type_annotations = NULL;
3097 }
3098
3099 // Transfer ownership of metadata allocated to the InstanceKlass.
3100 void ClassFileParser::apply_parsed_class_metadata(
3101 instanceKlassHandle this_klass,
3102 int java_fields_count, TRAPS) {
3103 _cp->set_pool_holder(this_klass());
3104 this_klass->set_constants(_cp);
3105 this_klass->set_fields(_fields, java_fields_count);
3106 this_klass->set_methods(_methods);
3107 this_klass->set_inner_classes(_inner_classes);
3108 this_klass->set_local_interfaces(_local_interfaces);
3109 this_klass->set_transitive_interfaces(_transitive_interfaces);
3110 this_klass->set_annotations(_combined_annotations);
3111
3112 // Clear out these fields so they don't get deallocated by the destructor
3113 clear_class_metadata();
3114 }
3115
3116 AnnotationArray* ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
3117 int runtime_visible_annotations_length,
3118 u1* runtime_invisible_annotations,
3119 int runtime_invisible_annotations_length, TRAPS) {
3120 AnnotationArray* annotations = NULL;
3121 if (runtime_visible_annotations != NULL ||
3122 runtime_invisible_annotations != NULL) {
3123 annotations = MetadataFactory::new_array<u1>(_loader_data,
3124 runtime_visible_annotations_length +
3125 runtime_invisible_annotations_length,
3126 CHECK_(annotations));
3127 if (runtime_visible_annotations != NULL) {
3128 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3129 annotations->at_put(i, runtime_visible_annotations[i]);
3130 }
3131 }
3132 if (runtime_invisible_annotations != NULL) {
3133 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3134 int append = runtime_visible_annotations_length+i;
3135 annotations->at_put(append, runtime_invisible_annotations[i]);
3136 }
3137 }
3138 }
3139 return annotations;
3140 }
3141
3142 instanceKlassHandle ClassFileParser::parse_super_class(int super_class_index,
3143 TRAPS) {
3144 instanceKlassHandle super_klass;
3145 if (super_class_index == 0) {
3146 check_property(_class_name == vmSymbols::java_lang_Object(),
3147 "Invalid superclass index %u in class file %s",
3148 super_class_index,
3149 CHECK_NULL);
3150 } else {
3151 check_property(valid_klass_reference_at(super_class_index),
3152 "Invalid superclass index %u in class file %s",
3153 super_class_index,
3154 CHECK_NULL);
3155 // The class name should be legal because it is checked when parsing constant pool.
3156 // However, make sure it is not an array type.
3157 bool is_array = false;
3158 if (_cp->tag_at(super_class_index).is_klass()) {
3159 super_klass = instanceKlassHandle(THREAD, _cp->resolved_klass_at(super_class_index));
3160 if (_need_verify)
3161 is_array = super_klass->oop_is_array();
3162 } else if (_need_verify) {
3163 is_array = (_cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3164 }
3165 if (_need_verify) {
3166 guarantee_property(!is_array,
3167 "Bad superclass name in class file %s", CHECK_NULL);
3168 }
3169 }
3170 return super_klass;
3171 }
3172
3173
3174 // Values needed for oopmap and InstanceKlass creation
3175 class FieldLayoutInfo : public StackObj {
3176 public:
3177 int* nonstatic_oop_offsets;
3178 unsigned int* nonstatic_oop_counts;
3179 unsigned int nonstatic_oop_map_count;
3180 unsigned int total_oop_map_count;
3181 int instance_size;
3182 int nonstatic_field_size;
3183 int static_field_size;
3184 bool has_nonstatic_fields;
3185 };
3186
3187 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3188 void ClassFileParser::layout_fields(Handle class_loader,
3189 FieldAllocationCount* fac,
3190 ClassAnnotationCollector* parsed_annotations,
3191 FieldLayoutInfo* info,
3192 TRAPS) {
3193
3194 // Field size and offset computation
3195 int nonstatic_field_size = _super_klass() == NULL ? 0 : _super_klass()->nonstatic_field_size();
3196 int next_static_oop_offset;
3197 int next_static_double_offset;
3198 int next_static_word_offset;
3199 int next_static_short_offset;
3200 int next_static_byte_offset;
3201 int next_nonstatic_oop_offset;
3202 int next_nonstatic_double_offset;
3203 int next_nonstatic_word_offset;
3204 int next_nonstatic_short_offset;
3205 int next_nonstatic_byte_offset;
3206 int first_nonstatic_oop_offset;
3207 int next_nonstatic_field_offset;
3208 int next_nonstatic_padded_offset;
3209
3210 // Count the contended fields by type.
3211 //
3212 // We ignore static fields, because @Contended is not supported for them.
3213 // The layout code below will also ignore the static fields.
3214 int nonstatic_contended_count = 0;
3215 FieldAllocationCount fac_contended;
3216 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3217 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3218 if (fs.is_contended()) {
3219 fac_contended.count[atype]++;
3220 if (!fs.access_flags().is_static()) {
3221 nonstatic_contended_count++;
3222 }
3223 }
3224 }
3225
3226
3227 // Calculate the starting byte offsets
3228 next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3229 next_static_double_offset = next_static_oop_offset +
3230 ((fac->count[STATIC_OOP]) * heapOopSize);
3231 if ( fac->count[STATIC_DOUBLE] &&
3232 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3233 Universe::field_type_should_be_aligned(T_LONG)) ) {
3234 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3235 }
3236
3237 next_static_word_offset = next_static_double_offset +
3238 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3239 next_static_short_offset = next_static_word_offset +
3240 ((fac->count[STATIC_WORD]) * BytesPerInt);
3241 next_static_byte_offset = next_static_short_offset +
3242 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3243
3244 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3245 nonstatic_field_size * heapOopSize;
3246
3247 next_nonstatic_field_offset = nonstatic_fields_start;
3248
3249 bool is_contended_class = parsed_annotations->is_contended();
3250
3251 // Class is contended, pad before all the fields
3252 if (is_contended_class) {
3253 next_nonstatic_field_offset += ContendedPaddingWidth;
3254 }
3255
3256 // Compute the non-contended fields count.
3257 // The packing code below relies on these counts to determine if some field
3258 // can be squeezed into the alignment gap. Contended fields are obviously
3259 // exempt from that.
3260 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3261 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3262 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3263 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3264 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3265
3266 // Total non-static fields count, including every contended field
3267 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3268 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3269 fac->count[NONSTATIC_OOP];
3270
3271 bool super_has_nonstatic_fields =
3272 (_super_klass() != NULL && _super_klass->has_nonstatic_fields());
3273 bool has_nonstatic_fields = super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3274
3275
3276 // Prepare list of oops for oop map generation.
3277 //
3278 // "offset" and "count" lists are describing the set of contiguous oop
3279 // regions. offset[i] is the start of the i-th region, which then has
3280 // count[i] oops following. Before we know how many regions are required,
3281 // we pessimistically allocate the maps to fit all the oops into the
3282 // distinct regions.
3283 //
3284 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3285 // to figure out if we still need to do this.
3286 int* nonstatic_oop_offsets;
3287 unsigned int* nonstatic_oop_counts;
3288 unsigned int nonstatic_oop_map_count = 0;
3289 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3290
3291 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3292 THREAD, int, max_nonstatic_oop_maps);
3293 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3294 THREAD, unsigned int, max_nonstatic_oop_maps);
3295
3296 first_nonstatic_oop_offset = 0; // will be set for first oop field
3297
3298 bool compact_fields = CompactFields;
3299 int allocation_style = FieldsAllocationStyle;
3300 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3301 assert(false, "0 <= FieldsAllocationStyle <= 2");
3302 allocation_style = 1; // Optimistic
3303 }
3304
3305 // The next classes have predefined hard-coded fields offsets
3306 // (see in JavaClasses::compute_hard_coded_offsets()).
3307 // Use default fields allocation order for them.
3308 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3309 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3310 _class_name == vmSymbols::java_lang_Class() ||
3311 _class_name == vmSymbols::java_lang_ClassLoader() ||
3312 _class_name == vmSymbols::java_lang_ref_Reference() ||
3313 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3314 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3315 _class_name == vmSymbols::java_lang_String() ||
3316 _class_name == vmSymbols::java_lang_Throwable() ||
3317 _class_name == vmSymbols::java_lang_Boolean() ||
3318 _class_name == vmSymbols::java_lang_Character() ||
3319 _class_name == vmSymbols::java_lang_Float() ||
3320 _class_name == vmSymbols::java_lang_Double() ||
3321 _class_name == vmSymbols::java_lang_Byte() ||
3322 _class_name == vmSymbols::java_lang_Short() ||
3323 _class_name == vmSymbols::java_lang_Integer() ||
3324 _class_name == vmSymbols::java_lang_Long())) {
3325 allocation_style = 0; // Allocate oops first
3326 compact_fields = false; // Don't compact fields
3327 }
3328
3329 // Rearrange fields for a given allocation style
3330 if( allocation_style == 0 ) {
3331 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3332 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3333 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3334 (nonstatic_oop_count * heapOopSize);
3335 } else if( allocation_style == 1 ) {
3336 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3337 next_nonstatic_double_offset = next_nonstatic_field_offset;
3338 } else if( allocation_style == 2 ) {
3339 // Fields allocation: oops fields in super and sub classes are together.
3340 if( nonstatic_field_size > 0 && _super_klass() != NULL &&
3341 _super_klass->nonstatic_oop_map_size() > 0 ) {
3342 unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3343 OopMapBlock* first_map = _super_klass->start_of_nonstatic_oop_maps();
3344 OopMapBlock* last_map = first_map + map_count - 1;
3345 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3346 if (next_offset == next_nonstatic_field_offset) {
3347 allocation_style = 0; // allocate oops first
3348 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3349 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3350 (nonstatic_oop_count * heapOopSize);
3351 }
3352 }
3353 if( allocation_style == 2 ) {
3354 allocation_style = 1; // allocate oops last
3355 next_nonstatic_double_offset = next_nonstatic_field_offset;
3356 }
3357 } else {
3358 ShouldNotReachHere();
3359 }
3360
3361 int nonstatic_oop_space_count = 0;
3362 int nonstatic_word_space_count = 0;
3363 int nonstatic_short_space_count = 0;
3364 int nonstatic_byte_space_count = 0;
3365 int nonstatic_oop_space_offset;
3366 int nonstatic_word_space_offset;
3367 int nonstatic_short_space_offset;
3368 int nonstatic_byte_space_offset;
3369
3370 // Try to squeeze some of the fields into the gaps due to
3371 // long/double alignment.
3372 if( nonstatic_double_count > 0 ) {
3373 int offset = next_nonstatic_double_offset;
3374 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3375 if( compact_fields && offset != next_nonstatic_double_offset ) {
3376 // Allocate available fields into the gap before double field.
3377 int length = next_nonstatic_double_offset - offset;
3378 assert(length == BytesPerInt, "");
3379 nonstatic_word_space_offset = offset;
3380 if( nonstatic_word_count > 0 ) {
3381 nonstatic_word_count -= 1;
3382 nonstatic_word_space_count = 1; // Only one will fit
3383 length -= BytesPerInt;
3384 offset += BytesPerInt;
3385 }
3386 nonstatic_short_space_offset = offset;
3387 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3388 nonstatic_short_count -= 1;
3389 nonstatic_short_space_count += 1;
3390 length -= BytesPerShort;
3391 offset += BytesPerShort;
3392 }
3393 nonstatic_byte_space_offset = offset;
3394 while( length > 0 && nonstatic_byte_count > 0 ) {
3395 nonstatic_byte_count -= 1;
3396 nonstatic_byte_space_count += 1;
3397 length -= 1;
3398 }
3399 // Allocate oop field in the gap if there are no other fields for that.
3400 nonstatic_oop_space_offset = offset;
3401 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3402 allocation_style != 0 ) { // when oop fields not first
3403 nonstatic_oop_count -= 1;
3404 nonstatic_oop_space_count = 1; // Only one will fit
3405 length -= heapOopSize;
3406 offset += heapOopSize;
3407 }
3408 }
3409 }
3410
3411 next_nonstatic_word_offset = next_nonstatic_double_offset +
3412 (nonstatic_double_count * BytesPerLong);
3413 next_nonstatic_short_offset = next_nonstatic_word_offset +
3414 (nonstatic_word_count * BytesPerInt);
3415 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3416 (nonstatic_short_count * BytesPerShort);
3417 next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3418 nonstatic_byte_count;
3419
3420 // let oops jump before padding with this allocation style
3421 if( allocation_style == 1 ) {
3422 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3423 if( nonstatic_oop_count > 0 ) {
3424 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3425 }
3426 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3427 }
3428
3429 // Iterate over fields again and compute correct offsets.
3430 // The field allocation type was temporarily stored in the offset slot.
3431 // oop fields are located before non-oop fields (static and non-static).
3432 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3433
3434 // skip already laid out fields
3435 if (fs.is_offset_set()) continue;
3436
3437 // contended instance fields are handled below
3438 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3439
3440 int real_offset;
3441 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3442
3443 // pack the rest of the fields
3444 switch (atype) {
3445 case STATIC_OOP:
3446 real_offset = next_static_oop_offset;
3447 next_static_oop_offset += heapOopSize;
3448 break;
3449 case STATIC_BYTE:
3450 real_offset = next_static_byte_offset;
3451 next_static_byte_offset += 1;
3452 break;
3453 case STATIC_SHORT:
3454 real_offset = next_static_short_offset;
3455 next_static_short_offset += BytesPerShort;
3456 break;
3457 case STATIC_WORD:
3458 real_offset = next_static_word_offset;
3459 next_static_word_offset += BytesPerInt;
3460 break;
3461 case STATIC_DOUBLE:
3462 real_offset = next_static_double_offset;
3463 next_static_double_offset += BytesPerLong;
3464 break;
3465 case NONSTATIC_OOP:
3466 if( nonstatic_oop_space_count > 0 ) {
3467 real_offset = nonstatic_oop_space_offset;
3468 nonstatic_oop_space_offset += heapOopSize;
3469 nonstatic_oop_space_count -= 1;
3470 } else {
3471 real_offset = next_nonstatic_oop_offset;
3472 next_nonstatic_oop_offset += heapOopSize;
3473 }
3474
3475 // Record this oop in the oop maps
3476 if( nonstatic_oop_map_count > 0 &&
3477 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3478 real_offset -
3479 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3480 heapOopSize ) {
3481 // This oop is adjacent to the previous one, add to current oop map
3482 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3483 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3484 } else {
3485 // This oop is not adjacent to the previous one, create new oop map
3486 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3487 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3488 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3489 nonstatic_oop_map_count += 1;
3490 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3491 first_nonstatic_oop_offset = real_offset;
3492 }
3493 }
3494 break;
3495 case NONSTATIC_BYTE:
3496 if( nonstatic_byte_space_count > 0 ) {
3497 real_offset = nonstatic_byte_space_offset;
3498 nonstatic_byte_space_offset += 1;
3499 nonstatic_byte_space_count -= 1;
3500 } else {
3501 real_offset = next_nonstatic_byte_offset;
3502 next_nonstatic_byte_offset += 1;
3503 }
3504 break;
3505 case NONSTATIC_SHORT:
3506 if( nonstatic_short_space_count > 0 ) {
3507 real_offset = nonstatic_short_space_offset;
3508 nonstatic_short_space_offset += BytesPerShort;
3509 nonstatic_short_space_count -= 1;
3510 } else {
3511 real_offset = next_nonstatic_short_offset;
3512 next_nonstatic_short_offset += BytesPerShort;
3513 }
3514 break;
3515 case NONSTATIC_WORD:
3516 if( nonstatic_word_space_count > 0 ) {
3517 real_offset = nonstatic_word_space_offset;
3518 nonstatic_word_space_offset += BytesPerInt;
3519 nonstatic_word_space_count -= 1;
3520 } else {
3521 real_offset = next_nonstatic_word_offset;
3522 next_nonstatic_word_offset += BytesPerInt;
3523 }
3524 break;
3525 case NONSTATIC_DOUBLE:
3526 real_offset = next_nonstatic_double_offset;
3527 next_nonstatic_double_offset += BytesPerLong;
3528 break;
3529 default:
3530 ShouldNotReachHere();
3531 }
3532 fs.set_offset(real_offset);
3533 }
3534
3535
3536 // Handle the contended cases.
3537 //
3538 // Each contended field should not intersect the cache line with another contended field.
3539 // In the absence of alignment information, we end up with pessimistically separating
3540 // the fields with full-width padding.
3541 //
3542 // Additionally, this should not break alignment for the fields, so we round the alignment up
3543 // for each field.
3544 if (nonstatic_contended_count > 0) {
3545
3546 // if there is at least one contended field, we need to have pre-padding for them
3547 next_nonstatic_padded_offset += ContendedPaddingWidth;
3548
3549 // collect all contended groups
3550 BitMap bm(_cp->size());
3551 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3552 // skip already laid out fields
3553 if (fs.is_offset_set()) continue;
3554
3555 if (fs.is_contended()) {
3556 bm.set_bit(fs.contended_group());
3557 }
3558 }
3559
3560 int current_group = -1;
3561 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3562
3563 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3564
3565 // skip already laid out fields
3566 if (fs.is_offset_set()) continue;
3567
3568 // skip non-contended fields and fields from different group
3569 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3570
3571 // handle statics below
3572 if (fs.access_flags().is_static()) continue;
3573
3574 int real_offset;
3575 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3576
3577 switch (atype) {
3578 case NONSTATIC_BYTE:
3579 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
3580 real_offset = next_nonstatic_padded_offset;
3581 next_nonstatic_padded_offset += 1;
3582 break;
3583
3584 case NONSTATIC_SHORT:
3585 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
3586 real_offset = next_nonstatic_padded_offset;
3587 next_nonstatic_padded_offset += BytesPerShort;
3588 break;
3589
3590 case NONSTATIC_WORD:
3591 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
3592 real_offset = next_nonstatic_padded_offset;
3593 next_nonstatic_padded_offset += BytesPerInt;
3594 break;
3595
3596 case NONSTATIC_DOUBLE:
3597 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
3598 real_offset = next_nonstatic_padded_offset;
3599 next_nonstatic_padded_offset += BytesPerLong;
3600 break;
3601
3602 case NONSTATIC_OOP:
3603 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
3604 real_offset = next_nonstatic_padded_offset;
3605 next_nonstatic_padded_offset += heapOopSize;
3606
3607 // Record this oop in the oop maps
3608 if( nonstatic_oop_map_count > 0 &&
3609 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3610 real_offset -
3611 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3612 heapOopSize ) {
3613 // This oop is adjacent to the previous one, add to current oop map
3614 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3615 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3616 } else {
3617 // This oop is not adjacent to the previous one, create new oop map
3618 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3619 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3620 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3621 nonstatic_oop_map_count += 1;
3622 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3623 first_nonstatic_oop_offset = real_offset;
3624 }
3625 }
3626 break;
3627
3628 default:
3629 ShouldNotReachHere();
3630 }
3631
3632 if (fs.contended_group() == 0) {
3633 // Contended group defines the equivalence class over the fields:
3634 // the fields within the same contended group are not inter-padded.
3635 // The only exception is default group, which does not incur the
3636 // equivalence, and so requires intra-padding.
3637 next_nonstatic_padded_offset += ContendedPaddingWidth;
3638 }
3639
3640 fs.set_offset(real_offset);
3641 } // for
3642
3643 // Start laying out the next group.
3644 // Note that this will effectively pad the last group in the back;
3645 // this is expected to alleviate memory contention effects for
3646 // subclass fields and/or adjacent object.
3647 // If this was the default group, the padding is already in place.
3648 if (current_group != 0) {
3649 next_nonstatic_padded_offset += ContendedPaddingWidth;
3650 }
3651 }
3652
3653 // handle static fields
3654 }
3655
3656 // Entire class is contended, pad in the back.
3657 // This helps to alleviate memory contention effects for subclass fields
3658 // and/or adjacent object.
3659 if (is_contended_class) {
3660 next_nonstatic_padded_offset += ContendedPaddingWidth;
3661 }
3662
3663 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
3664
3665 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
3666 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
3667 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
3668
3669 int static_field_size = (static_fields_end -
3670 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
3671 nonstatic_field_size = nonstatic_field_size +
3672 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
3673
3674 int instance_size = align_object_size(instance_end / wordSize);
3675
3676 assert(instance_size == align_object_size(align_size_up(
3677 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
3678 wordSize) / wordSize), "consistent layout helper value");
3679
3680 // Invariant: nonstatic_field end/start should only change if there are
3681 // nonstatic fields in the class, or if the class is contended. We compare
3682 // against the non-aligned value, so that end alignment will not fail the
3683 // assert without actually having the fields.
3684 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
3685 is_contended_class ||
3686 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
3687
3688 // Number of non-static oop map blocks allocated at end of klass.
3689 const unsigned int total_oop_map_count =
3690 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
3691 first_nonstatic_oop_offset);
3692
3693 #ifndef PRODUCT
3694 if (PrintFieldLayout) {
3695 print_field_layout(_class_name,
3696 _fields,
3697 _cp,
3698 instance_size,
3699 nonstatic_fields_start,
3700 nonstatic_fields_end,
3701 static_fields_end);
3702 }
3703
3704 #endif
3705 // Pass back information needed for InstanceKlass creation
3706 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
3707 info->nonstatic_oop_counts = nonstatic_oop_counts;
3708 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
3709 info->total_oop_map_count = total_oop_map_count;
3710 info->instance_size = instance_size;
3711 info->static_field_size = static_field_size;
3712 info->nonstatic_field_size = nonstatic_field_size;
3713 info->has_nonstatic_fields = has_nonstatic_fields;
3714 }
3715
3716
3717 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
3718 ClassLoaderData* loader_data,
3719 Handle protection_domain,
3720 KlassHandle host_klass,
3721 GrowableArray<Handle>* cp_patches,
3722 TempNewSymbol& parsed_name,
3723 bool verify,
3724 TRAPS) {
3725
3726 // When a retransformable agent is attached, JVMTI caches the
3727 // class bytes that existed before the first retransformation.
3728 // If RedefineClasses() was used before the retransformable
3729 // agent attached, then the cached class bytes may not be the
3730 // original class bytes.
3731 JvmtiCachedClassFileData *cached_class_file = NULL;
3732 Handle class_loader(THREAD, loader_data->class_loader());
3733 bool has_default_methods = false;
3734 bool declares_default_methods = false;
3735 ResourceMark rm(THREAD);
3736
3737 ClassFileStream* cfs = stream();
3738 // Timing
3739 assert(THREAD->is_Java_thread(), "must be a JavaThread");
3740 JavaThread* jt = (JavaThread*) THREAD;
3741
3742 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
3743 ClassLoader::perf_class_parse_selftime(),
3744 NULL,
3745 jt->get_thread_stat()->perf_recursion_counts_addr(),
3746 jt->get_thread_stat()->perf_timers_addr(),
3747 PerfClassTraceTime::PARSE_CLASS);
3748
3749 init_parsed_class_attributes(loader_data);
3750
3751 if (JvmtiExport::should_post_class_file_load_hook()) {
3752 // Get the cached class file bytes (if any) from the class that
3753 // is being redefined or retransformed. We use jvmti_thread_state()
3754 // instead of JvmtiThreadState::state_for(jt) so we don't allocate
3755 // a JvmtiThreadState any earlier than necessary. This will help
3756 // avoid the bug described by 7126851.
3757 JvmtiThreadState *state = jt->jvmti_thread_state();
3758 if (state != NULL) {
3759 KlassHandle *h_class_being_redefined =
3760 state->get_class_being_redefined();
3761 if (h_class_being_redefined != NULL) {
3762 instanceKlassHandle ikh_class_being_redefined =
3763 instanceKlassHandle(THREAD, (*h_class_being_redefined)());
3764 cached_class_file = ikh_class_being_redefined->get_cached_class_file();
3765 }
3766 }
3767
3768 unsigned char* ptr = cfs->buffer();
3769 unsigned char* end_ptr = cfs->buffer() + cfs->length();
3770
3771 JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain,
3772 &ptr, &end_ptr, &cached_class_file);
3773
3774 if (ptr != cfs->buffer()) {
3775 // JVMTI agent has modified class file data.
3776 // Set new class file stream using JVMTI agent modified
3777 // class file data.
3778 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
3779 set_stream(cfs);
3780 }
3781 }
3782
3783 _host_klass = host_klass;
3784 _cp_patches = cp_patches;
3785
3786 instanceKlassHandle nullHandle;
3787
3788 // Figure out whether we can skip format checking (matching classic VM behavior)
3789 if (DumpSharedSpaces) {
3790 // verify == true means it's a 'remote' class (i.e., non-boot class)
3791 // Verification decision is based on BytecodeVerificationRemote flag
3792 // for those classes.
3793 _need_verify = (verify) ? BytecodeVerificationRemote :
3794 BytecodeVerificationLocal;
3795 } else {
3796 _need_verify = Verifier::should_verify_for(class_loader(), verify);
3797 }
3798
3799 // Set the verify flag in stream
3800 cfs->set_verify(_need_verify);
3801
3802 // Save the class file name for easier error message printing.
3803 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
3804
3805 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
3806 // Magic value
3807 u4 magic = cfs->get_u4_fast();
3808 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
3809 "Incompatible magic value %u in class file %s",
3810 magic, CHECK_(nullHandle));
3811
3812 // Version numbers
3813 u2 minor_version = cfs->get_u2_fast();
3814 u2 major_version = cfs->get_u2_fast();
3815
3816 if (DumpSharedSpaces && major_version < JAVA_1_5_VERSION) {
3817 ResourceMark rm;
3818 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
3819 major_version, minor_version, name->as_C_string());
3820 Exceptions::fthrow(
3821 THREAD_AND_LOCATION,
3822 vmSymbols::java_lang_UnsupportedClassVersionError(),
3823 "Unsupported major.minor version for dump time %u.%u",
3824 major_version,
3825 minor_version);
3826 }
3827
3828 // Check version numbers - we check this even with verifier off
3829 if (!is_supported_version(major_version, minor_version)) {
3830 if (name == NULL) {
3831 Exceptions::fthrow(
3832 THREAD_AND_LOCATION,
3833 vmSymbols::java_lang_UnsupportedClassVersionError(),
3834 "Unsupported class file version %u.%u, "
3835 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
3836 major_version,
3837 minor_version,
3838 JAVA_MAX_SUPPORTED_VERSION,
3839 JAVA_MAX_SUPPORTED_MINOR_VERSION);
3840 } else {
3841 ResourceMark rm(THREAD);
3842 Exceptions::fthrow(
3843 THREAD_AND_LOCATION,
3844 vmSymbols::java_lang_UnsupportedClassVersionError(),
3845 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
3846 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
3847 name->as_C_string(),
3848 major_version,
3849 minor_version,
3850 JAVA_MAX_SUPPORTED_VERSION,
3851 JAVA_MAX_SUPPORTED_MINOR_VERSION);
3852 }
3853 return nullHandle;
3854 }
3855
3856 _major_version = major_version;
3857 _minor_version = minor_version;
3858
3859
3860 // Check if verification needs to be relaxed for this class file
3861 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3862 _relax_verify = Verifier::relax_verify_for(class_loader());
3863
3864 // Constant pool
3865 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
3866
3867 int cp_size = cp->length();
3868
3869 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
3870
3871 // Access flags
3872 AccessFlags access_flags;
3873 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3874
3875 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3876 // Set abstract bit for old class files for backward compatibility
3877 flags |= JVM_ACC_ABSTRACT;
3878 }
3879 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3880 access_flags.set_flags(flags);
3881
3882 // This class and superclass
3883 u2 this_class_index = cfs->get_u2_fast();
3884 check_property(
3885 valid_cp_range(this_class_index, cp_size) &&
3886 cp->tag_at(this_class_index).is_unresolved_klass(),
3887 "Invalid this class index %u in constant pool in class file %s",
3888 this_class_index, CHECK_(nullHandle));
3889
3890 Symbol* class_name = cp->klass_name_at(this_class_index);
3891 assert(class_name != NULL, "class_name can't be null");
3892
3893 // It's important to set parsed_name *before* resolving the super class.
3894 // (it's used for cleanup by the caller if parsing fails)
3895 parsed_name = class_name;
3896 // parsed_name is returned and can be used if there's an error, so add to
3897 // its reference count. Caller will decrement the refcount.
3898 parsed_name->increment_refcount();
3899
3900 // Update _class_name which could be null previously to be class_name
3901 _class_name = class_name;
3902
3903 // Don't need to check whether this class name is legal or not.
3904 // It has been checked when constant pool is parsed.
3905 // However, make sure it is not an array type.
3906 if (_need_verify) {
3907 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3908 "Bad class name in class file %s",
3909 CHECK_(nullHandle));
3910 }
3911
3912 Klass* preserve_this_klass; // for storing result across HandleMark
3913
3914 // release all handles when parsing is done
3915 { HandleMark hm(THREAD);
3916
3917 // Checks if name in class file matches requested name
3918 if (name != NULL && class_name != name) {
3919 ResourceMark rm(THREAD);
3920 Exceptions::fthrow(
3921 THREAD_AND_LOCATION,
3922 vmSymbols::java_lang_NoClassDefFoundError(),
3923 "%s (wrong name: %s)",
3924 name->as_C_string(),
3925 class_name->as_C_string()
3926 );
3927 return nullHandle;
3928 }
3929
3930 if (TraceClassLoadingPreorder) {
3931 tty->print("[Loading %s", (name != NULL) ? name->as_klass_external_name() : "NoName");
3932 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3933 tty->print_cr("]");
3934 }
3935 #if INCLUDE_CDS
3936 if (DumpLoadedClassList != NULL && cfs->source() != NULL && classlist_file->is_open()) {
3937 // Only dump the classes that can be stored into CDS archive
3938 if (SystemDictionaryShared::is_sharing_possible(loader_data)) {
3939 if (name != NULL) {
3940 ResourceMark rm(THREAD);
3941 classlist_file->print_cr("%s", name->as_C_string());
3942 classlist_file->flush();
3943 }
3944 }
3945 }
3946 #endif
3947
3948 u2 super_class_index = cfs->get_u2_fast();
3949 instanceKlassHandle super_klass = parse_super_class(super_class_index,
3950 CHECK_NULL);
3951
3952 // Interfaces
3953 u2 itfs_len = cfs->get_u2_fast();
3954 Array<Klass*>* local_interfaces =
3955 parse_interfaces(itfs_len, protection_domain, _class_name,
3956 &has_default_methods, CHECK_(nullHandle));
3957
3958 u2 java_fields_count = 0;
3959 // Fields (offsets are filled in later)
3960 FieldAllocationCount fac;
3961 Array<u2>* fields = parse_fields(class_name,
3962 access_flags.is_interface(),
3963 &fac, &java_fields_count,
3964 CHECK_(nullHandle));
3965 // Methods
3966 bool has_final_method = false;
3967 AccessFlags promoted_flags;
3968 promoted_flags.set_flags(0);
3969 Array<Method*>* methods = parse_methods(access_flags.is_interface(),
3970 &promoted_flags,
3971 &has_final_method,
3972 &declares_default_methods,
3973 CHECK_(nullHandle));
3974
3975 if (declares_default_methods) {
3976 has_default_methods = true;
3977 }
3978
3979 // Additional attributes
3980 ClassAnnotationCollector parsed_annotations;
3981 parse_classfile_attributes(&parsed_annotations, CHECK_(nullHandle));
3982
3983 // Finalize the Annotations metadata object,
3984 // now that all annotation arrays have been created.
3985 create_combined_annotations(CHECK_(nullHandle));
3986
3987 // Make sure this is the end of class file stream
3988 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3989
3990 // We check super class after class file is parsed and format is checked
3991 if (super_class_index > 0 && super_klass.is_null()) {
3992 Symbol* sk = cp->klass_name_at(super_class_index);
3993 if (access_flags.is_interface()) {
3994 // Before attempting to resolve the superclass, check for class format
3995 // errors not checked yet.
3996 guarantee_property(sk == vmSymbols::java_lang_Object(),
3997 "Interfaces must have java.lang.Object as superclass in class file %s",
3998 CHECK_(nullHandle));
3999 }
4000 Klass* k = SystemDictionary::resolve_super_or_fail(class_name, sk,
4001 class_loader,
4002 protection_domain,
4003 true,
4004 CHECK_(nullHandle));
4005
4006 KlassHandle kh (THREAD, k);
4007 super_klass = instanceKlassHandle(THREAD, kh());
4008 }
4009 if (super_klass.not_null()) {
4010
4011 if (super_klass->has_default_methods()) {
4012 has_default_methods = true;
4013 }
4014
4015 if (super_klass->is_interface()) {
4016 ResourceMark rm(THREAD);
4017 Exceptions::fthrow(
4018 THREAD_AND_LOCATION,
4019 vmSymbols::java_lang_IncompatibleClassChangeError(),
4020 "class %s has interface %s as super class",
4021 class_name->as_klass_external_name(),
4022 super_klass->external_name()
4023 );
4024 return nullHandle;
4025 }
4026 // Make sure super class is not final
4027 if (super_klass->is_final()) {
4028 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
4029 }
4030 }
4031
4032 // save super klass for error handling.
4033 _super_klass = super_klass;
4034
4035 // Compute the transitive list of all unique interfaces implemented by this class
4036 _transitive_interfaces =
4037 compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
4038
4039 // sort methods
4040 intArray* method_ordering = sort_methods(methods);
4041
4042 // promote flags from parse_methods() to the klass' flags
4043 access_flags.add_promoted_flags(promoted_flags.as_int());
4044
4045 // Size of Java vtable (in words)
4046 int vtable_size = 0;
4047 int itable_size = 0;
4048 int num_miranda_methods = 0;
4049
4050 GrowableArray<Method*> all_mirandas(20);
4051
4052 klassVtable::compute_vtable_size_and_num_mirandas(
4053 &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods,
4054 access_flags, class_loader, class_name, local_interfaces,
4055 CHECK_(nullHandle));
4056
4057 // Size of Java itable (in words)
4058 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(_transitive_interfaces);
4059
4060 FieldLayoutInfo info;
4061 layout_fields(class_loader, &fac, &parsed_annotations, &info, CHECK_NULL);
4062
4063 int total_oop_map_size2 =
4064 InstanceKlass::nonstatic_oop_map_size(info.total_oop_map_count);
4065
4066 // Compute reference type
4067 ReferenceType rt;
4068 if (super_klass() == NULL) {
4069 rt = REF_NONE;
4070 } else {
4071 rt = super_klass->reference_type();
4072 }
4073
4074 // We can now create the basic Klass* for this klass
4075 _klass = InstanceKlass::allocate_instance_klass(loader_data,
4076 vtable_size,
4077 itable_size,
4078 info.static_field_size,
4079 total_oop_map_size2,
4080 rt,
4081 access_flags,
4082 name,
4083 super_klass(),
4084 !host_klass.is_null(),
4085 CHECK_(nullHandle));
4086 instanceKlassHandle this_klass (THREAD, _klass);
4087
4088 assert(this_klass->static_field_size() == info.static_field_size, "sanity");
4089 assert(this_klass->nonstatic_oop_map_count() == info.total_oop_map_count,
4090 "sanity");
4091
4092 // Fill in information already parsed
4093 this_klass->set_should_verify_class(verify);
4094 jint lh = Klass::instance_layout_helper(info.instance_size, false);
4095 this_klass->set_layout_helper(lh);
4096 assert(this_klass->oop_is_instance(), "layout is correct");
4097 assert(this_klass->size_helper() == info.instance_size, "correct size_helper");
4098 // Not yet: supers are done below to support the new subtype-checking fields
4099 //this_klass->set_super(super_klass());
4100 this_klass->set_class_loader_data(loader_data);
4101 this_klass->set_nonstatic_field_size(info.nonstatic_field_size);
4102 this_klass->set_has_nonstatic_fields(info.has_nonstatic_fields);
4103 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
4104
4105 apply_parsed_class_metadata(this_klass, java_fields_count, CHECK_NULL);
4106
4107 if (has_final_method) {
4108 this_klass->set_has_final_method();
4109 }
4110 this_klass->copy_method_ordering(method_ordering, CHECK_NULL);
4111 // The InstanceKlass::_methods_jmethod_ids cache
4112 // is managed on the assumption that the initial cache
4113 // size is equal to the number of methods in the class. If
4114 // that changes, then InstanceKlass::idnum_can_increment()
4115 // has to be changed accordingly.
4116 this_klass->set_initial_method_idnum(methods->length());
4117 this_klass->set_name(cp->klass_name_at(this_class_index));
4118 if (is_anonymous()) // I am well known to myself
4119 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
4120
4121 this_klass->set_minor_version(minor_version);
4122 this_klass->set_major_version(major_version);
4123 this_klass->set_has_default_methods(has_default_methods);
4124 this_klass->set_declares_default_methods(declares_default_methods);
4125
4126 if (!host_klass.is_null()) {
4127 assert (this_klass->is_anonymous(), "should be the same");
4128 this_klass->set_host_klass(host_klass());
4129 }
4130
4131 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4132 // (We used to do this lazily, but now we query it in Rewriter,
4133 // which is eagerly done for every method, so we might as well do it now,
4134 // when everything is fresh in memory.)
4135 if (Method::klass_id_for_intrinsics(this_klass()) != vmSymbols::NO_SID) {
4136 for (int j = 0; j < methods->length(); j++) {
4137 methods->at(j)->init_intrinsic_id();
4138 }
4139 }
4140
4141 if (cached_class_file != NULL) {
4142 // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
4143 this_klass->set_cached_class_file(cached_class_file);
4144 }
4145
4146 // Fill in field values obtained by parse_classfile_attributes
4147 if (parsed_annotations.has_any_annotations())
4148 parsed_annotations.apply_to(this_klass);
4149 apply_parsed_class_attributes(this_klass);
4150
4151 // Miranda methods
4152 if ((num_miranda_methods > 0) ||
4153 // if this class introduced new miranda methods or
4154 (super_klass.not_null() && (super_klass->has_miranda_methods()))
4155 // super class exists and this class inherited miranda methods
4156 ) {
4157 this_klass->set_has_miranda_methods(); // then set a flag
4158 }
4159
4160 // Fill in information needed to compute superclasses.
4161 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
4162
4163 // Initialize itable offset tables
4164 klassItable::setup_itable_offset_table(this_klass);
4165
4166 // Compute transitive closure of interfaces this class implements
4167 // Do final class setup
4168 fill_oop_maps(this_klass, info.nonstatic_oop_map_count, info.nonstatic_oop_offsets, info.nonstatic_oop_counts);
4169
4170 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
4171 set_precomputed_flags(this_klass);
4172
4173 // reinitialize modifiers, using the InnerClasses attribute
4174 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
4175 this_klass->set_modifier_flags(computed_modifiers);
4176
4177 // check if this class can access its super class
4178 check_super_class_access(this_klass, CHECK_(nullHandle));
4179
4180 // check if this class can access its superinterfaces
4181 check_super_interface_access(this_klass, CHECK_(nullHandle));
4182
4183 // check if this class overrides any final method
4184 check_final_method_override(this_klass, CHECK_(nullHandle));
4185
4186 // check that if this class is an interface then it doesn't have static methods
4187 if (this_klass->is_interface()) {
4188 /* An interface in a JAVA 8 classfile can be static */
4189 if (_major_version < JAVA_8_VERSION) {
4190 check_illegal_static_method(this_klass, CHECK_(nullHandle));
4191 }
4192 }
4193
4194 // Allocate mirror and initialize static fields
4195 java_lang_Class::create_mirror(this_klass, class_loader, protection_domain,
4196 CHECK_(nullHandle));
4197
4198 // Generate any default methods - default methods are interface methods
4199 // that have a default implementation. This is new with Lambda project.
4200 if (has_default_methods ) {
4201 DefaultMethods::generate_default_methods(
4202 this_klass(), &all_mirandas, CHECK_(nullHandle));
4203 }
4204
4205 // Update the loader_data graph.
4206 record_defined_class_dependencies(this_klass, CHECK_NULL);
4207
4208 ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
4209 false /* not shared class */);
4210
4211 if (TraceClassLoading) {
4212 ResourceMark rm;
4213 // print in a single call to reduce interleaving of output
4214 if (cfs->source() != NULL) {
4215 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4216 cfs->source());
4217 } else if (class_loader.is_null()) {
4218 Klass* caller =
4219 THREAD->is_Java_thread()
4220 ? ((JavaThread*)THREAD)->security_get_caller_class(1)
4221 : NULL;
4222 // caller can be NULL, for example, during a JVMTI VM_Init hook
4223 if (caller != NULL) {
4224 tty->print("[Loaded %s by instance of %s]\n",
4225 this_klass->external_name(),
4226 InstanceKlass::cast(caller)->external_name());
4227 } else {
4228 tty->print("[Loaded %s]\n", this_klass->external_name());
4229 }
4230 } else {
4231 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4232 InstanceKlass::cast(class_loader->klass())->external_name());
4233 }
4234 }
4235
4236 if (TraceClassResolution) {
4237 ResourceMark rm;
4238 // print out the superclass.
4239 const char * from = this_klass()->external_name();
4240 if (this_klass->java_super() != NULL) {
4241 tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name());
4242 }
4243 // print out each of the interface classes referred to by this class.
4244 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4245 if (local_interfaces != NULL) {
4246 int length = local_interfaces->length();
4247 for (int i = 0; i < length; i++) {
4248 Klass* k = local_interfaces->at(i);
4249 InstanceKlass* to_class = InstanceKlass::cast(k);
4250 const char * to = to_class->external_name();
4251 tty->print("RESOLVE %s %s (interface)\n", from, to);
4252 }
4253 }
4254 }
4255
4256 // preserve result across HandleMark
4257 preserve_this_klass = this_klass();
4258 }
4259
4260 // Create new handle outside HandleMark (might be needed for
4261 // Extended Class Redefinition)
4262 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
4263 debug_only(this_klass->verify();)
4264
4265 // Clear class if no error has occurred so destructor doesn't deallocate it
4266 _klass = NULL;
4267 return this_klass;
4268 }
4269
4270 // Destructor to clean up if there's an error
4271 ClassFileParser::~ClassFileParser() {
4272 MetadataFactory::free_metadata(_loader_data, _cp);
4273 MetadataFactory::free_array<u2>(_loader_data, _fields);
4274
4275 // Free methods
4276 InstanceKlass::deallocate_methods(_loader_data, _methods);
4277
4278 // beware of the Universe::empty_blah_array!!
4279 if (_inner_classes != Universe::the_empty_short_array()) {
4280 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
4281 }
4282
4283 // Free interfaces
4284 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass(),
4285 _local_interfaces, _transitive_interfaces);
4286
4287 if (_combined_annotations != NULL) {
4288 // After all annotations arrays have been created, they are installed into the
4289 // Annotations object that will be assigned to the InstanceKlass being created.
4290
4291 // Deallocate the Annotations object and the installed annotations arrays.
4292 _combined_annotations->deallocate_contents(_loader_data);
4293
4294 // If the _combined_annotations pointer is non-NULL,
4295 // then the other annotations fields should have been cleared.
4296 assert(_annotations == NULL, "Should have been cleared");
4297 assert(_type_annotations == NULL, "Should have been cleared");
4298 assert(_fields_annotations == NULL, "Should have been cleared");
4299 assert(_fields_type_annotations == NULL, "Should have been cleared");
4300 } else {
4301 // If the annotations arrays were not installed into the Annotations object,
4302 // then they have to be deallocated explicitly.
4303 MetadataFactory::free_array<u1>(_loader_data, _annotations);
4304 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
4305 Annotations::free_contents(_loader_data, _fields_annotations);
4306 Annotations::free_contents(_loader_data, _fields_type_annotations);
4307 }
4308
4309 clear_class_metadata();
4310
4311 // deallocate the klass if already created. Don't directly deallocate, but add
4312 // to the deallocate list so that the klass is removed from the CLD::_klasses list
4313 // at a safepoint.
4314 if (_klass != NULL) {
4315 _loader_data->add_to_deallocate_list(_klass);
4316 }
4317 _klass = NULL;
4318 }
4319
4320 void ClassFileParser::print_field_layout(Symbol* name,
4321 Array<u2>* fields,
4322 constantPoolHandle cp,
4323 int instance_size,
4324 int instance_fields_start,
4325 int instance_fields_end,
4326 int static_fields_end) {
4327 tty->print("%s: field layout\n", name->as_klass_external_name());
4328 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
4329 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4330 if (!fs.access_flags().is_static()) {
4331 tty->print(" @%3d \"%s\" %s\n",
4332 fs.offset(),
4333 fs.name()->as_klass_external_name(),
4334 fs.signature()->as_klass_external_name());
4335 }
4336 }
4337 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
4338 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
4339 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
4340 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4341 if (fs.access_flags().is_static()) {
4342 tty->print(" @%3d \"%s\" %s\n",
4343 fs.offset(),
4344 fs.name()->as_klass_external_name(),
4345 fs.signature()->as_klass_external_name());
4346 }
4347 }
4348 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
4349 tty->print("\n");
4350 }
4351
4352 unsigned int
4353 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
4354 unsigned int nonstatic_oop_map_count,
4355 int first_nonstatic_oop_offset) {
4356 unsigned int map_count =
4357 super.is_null() ? 0 : super->nonstatic_oop_map_count();
4358 if (nonstatic_oop_map_count > 0) {
4359 // We have oops to add to map
4360 if (map_count == 0) {
4361 map_count = nonstatic_oop_map_count;
4362 } else {
4363 // Check whether we should add a new map block or whether the last one can
4364 // be extended
4365 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
4366 OopMapBlock* const last_map = first_map + map_count - 1;
4367
4368 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
4369 if (next_offset == first_nonstatic_oop_offset) {
4370 // There is no gap bettwen superklass's last oop field and first
4371 // local oop field, merge maps.
4372 nonstatic_oop_map_count -= 1;
4373 } else {
4374 // Superklass didn't end with a oop field, add extra maps
4375 assert(next_offset < first_nonstatic_oop_offset, "just checking");
4376 }
4377 map_count += nonstatic_oop_map_count;
4378 }
4379 }
4380 return map_count;
4381 }
4382
4383
4384 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
4385 unsigned int nonstatic_oop_map_count,
4386 int* nonstatic_oop_offsets,
4387 unsigned int* nonstatic_oop_counts) {
4388 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4389 const InstanceKlass* const super = k->superklass();
4390 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4391 if (super_count > 0) {
4392 // Copy maps from superklass
4393 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4394 for (unsigned int i = 0; i < super_count; ++i) {
4395 *this_oop_map++ = *super_oop_map++;
4396 }
4397 }
4398
4399 if (nonstatic_oop_map_count > 0) {
4400 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4401 // The counts differ because there is no gap between superklass's last oop
4402 // field and the first local oop field. Extend the last oop map copied
4403 // from the superklass instead of creating new one.
4404 nonstatic_oop_map_count--;
4405 nonstatic_oop_offsets++;
4406 this_oop_map--;
4407 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4408 this_oop_map++;
4409 }
4410
4411 // Add new map blocks, fill them
4412 while (nonstatic_oop_map_count-- > 0) {
4413 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4414 this_oop_map->set_count(*nonstatic_oop_counts++);
4415 this_oop_map++;
4416 }
4417 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4418 this_oop_map, "sanity");
4419 }
4420 }
4421
4422
4423 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
4424 Klass* super = k->super();
4425
4426 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4427 // in which case we don't have to register objects as finalizable
4428 if (!_has_empty_finalizer) {
4429 if (_has_finalizer ||
4430 (super != NULL && super->has_finalizer())) {
4431 k->set_has_finalizer();
4432 }
4433 }
4434
4435 #ifdef ASSERT
4436 bool f = false;
4437 Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
4438 vmSymbols::void_method_signature());
4439 if (m != NULL && !m->is_empty_method()) {
4440 f = true;
4441 }
4442
4443 // Spec doesn't prevent agent from redefinition of empty finalizer.
4444 // Despite the fact that it's generally bad idea and redefined finalizer
4445 // will not work as expected we shouldn't abort vm in this case
4446 if (!k->has_redefined_this_or_super()) {
4447 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
4448 }
4449 #endif
4450
4451 // Check if this klass supports the java.lang.Cloneable interface
4452 if (SystemDictionary::Cloneable_klass_loaded()) {
4453 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4454 k->set_is_cloneable();
4455 }
4456 }
4457
4458 // Check if this klass has a vanilla default constructor
4459 if (super == NULL) {
4460 // java.lang.Object has empty default constructor
4461 k->set_has_vanilla_constructor();
4462 } else {
4463 if (super->has_vanilla_constructor() &&
4464 _has_vanilla_constructor) {
4465 k->set_has_vanilla_constructor();
4466 }
4467 #ifdef ASSERT
4468 bool v = false;
4469 if (super->has_vanilla_constructor()) {
4470 Method* constructor = k->find_method(vmSymbols::object_initializer_name(
4471 ), vmSymbols::void_method_signature());
4472 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4473 v = true;
4474 }
4475 }
4476 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4477 #endif
4478 }
4479
4480 // If it cannot be fast-path allocated, set a bit in the layout helper.
4481 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4482 assert(k->size_helper() > 0, "layout_helper is initialized");
4483 if ((!RegisterFinalizersAtInit && k->has_finalizer())
4484 || k->is_abstract() || k->is_interface()
4485 || (k->name() == vmSymbols::java_lang_Class() && k->class_loader() == NULL)
4486 || k->size_helper() >= FastAllocateSizeLimit) {
4487 // Forbid fast-path allocation.
4488 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
4489 k->set_layout_helper(lh);
4490 }
4491 }
4492
4493 // Attach super classes and interface classes to class loader data
4494 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
4495 ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
4496 if (defining_loader_data->is_the_null_class_loader_data()) {
4497 // Dependencies to null class loader data are implicit.
4498 return;
4499 } else {
4500 // add super class dependency
4501 Klass* super = defined_klass->super();
4502 if (super != NULL) {
4503 defining_loader_data->record_dependency(super, CHECK);
4504 }
4505
4506 // add super interface dependencies
4507 Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
4508 if (local_interfaces != NULL) {
4509 int length = local_interfaces->length();
4510 for (int i = 0; i < length; i++) {
4511 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4512 }
4513 }
4514 }
4515 }
4516
4517 // utility methods for appending an array with check for duplicates
4518
4519 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
4520 // iterate over new interfaces
4521 for (int i = 0; i < ifs->length(); i++) {
4522 Klass* e = ifs->at(i);
4523 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4524 // add new interface
4525 result->append_if_missing(e);
4526 }
4527 }
4528
4529 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(
4530 instanceKlassHandle super,
4531 Array<Klass*>* local_ifs, TRAPS) {
4532 // Compute maximum size for transitive interfaces
4533 int max_transitive_size = 0;
4534 int super_size = 0;
4535 // Add superclass transitive interfaces size
4536 if (super.not_null()) {
4537 super_size = super->transitive_interfaces()->length();
4538 max_transitive_size += super_size;
4539 }
4540 // Add local interfaces' super interfaces
4541 int local_size = local_ifs->length();
4542 for (int i = 0; i < local_size; i++) {
4543 Klass* l = local_ifs->at(i);
4544 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4545 }
4546 // Finally add local interfaces
4547 max_transitive_size += local_size;
4548 // Construct array
4549 if (max_transitive_size == 0) {
4550 // no interfaces, use canonicalized array
4551 return Universe::the_empty_klass_array();
4552 } else if (max_transitive_size == super_size) {
4553 // no new local interfaces added, share superklass' transitive interface array
4554 return super->transitive_interfaces();
4555 } else if (max_transitive_size == local_size) {
4556 // only local interfaces added, share local interface array
4557 return local_ifs;
4558 } else {
4559 ResourceMark rm;
4560 GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
4561
4562 // Copy down from superclass
4563 if (super.not_null()) {
4564 append_interfaces(result, super->transitive_interfaces());
4565 }
4566
4567 // Copy down from local interfaces' superinterfaces
4568 for (int i = 0; i < local_ifs->length(); i++) {
4569 Klass* l = local_ifs->at(i);
4570 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4571 }
4572 // Finally add local interfaces
4573 append_interfaces(result, local_ifs);
4574
4575 // length will be less than the max_transitive_size if duplicates were removed
4576 int length = result->length();
4577 assert(length <= max_transitive_size, "just checking");
4578 Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(_loader_data, length, CHECK_NULL);
4579 for (int i = 0; i < length; i++) {
4580 Klass* e = result->at(i);
4581 assert(e != NULL, "just checking");
4582 new_result->at_put(i, e);
4583 }
4584 return new_result;
4585 }
4586 }
4587
4588 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
4589 Klass* super = this_klass->super();
4590 if ((super != NULL) &&
4591 (!Reflection::verify_class_access(this_klass(), super, false))) {
4592 ResourceMark rm(THREAD);
4593 Exceptions::fthrow(
4594 THREAD_AND_LOCATION,
4595 vmSymbols::java_lang_IllegalAccessError(),
4596 "class %s cannot access its superclass %s",
4597 this_klass->external_name(),
4598 InstanceKlass::cast(super)->external_name()
4599 );
4600 return;
4601 }
4602 }
4603
4604
4605 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4606 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4607 int lng = local_interfaces->length();
4608 for (int i = lng - 1; i >= 0; i--) {
4609 Klass* k = local_interfaces->at(i);
4610 assert (k != NULL && k->is_interface(), "invalid interface");
4611 if (!Reflection::verify_class_access(this_klass(), k, false)) {
4612 ResourceMark rm(THREAD);
4613 Exceptions::fthrow(
4614 THREAD_AND_LOCATION,
4615 vmSymbols::java_lang_IllegalAccessError(),
4616 "class %s cannot access its superinterface %s",
4617 this_klass->external_name(),
4618 InstanceKlass::cast(k)->external_name()
4619 );
4620 return;
4621 }
4622 }
4623 }
4624
4625
4626 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4627 Array<Method*>* methods = this_klass->methods();
4628 int num_methods = methods->length();
4629
4630 // go thru each method and check if it overrides a final method
4631 for (int index = 0; index < num_methods; index++) {
4632 Method* m = methods->at(index);
4633
4634 // skip private, static, and <init> methods
4635 if ((!m->is_private() && !m->is_static()) &&
4636 (m->name() != vmSymbols::object_initializer_name())) {
4637
4638 Symbol* name = m->name();
4639 Symbol* signature = m->signature();
4640 Klass* k = this_klass->super();
4641 Method* super_m = NULL;
4642 while (k != NULL) {
4643 // skip supers that don't have final methods.
4644 if (k->has_final_method()) {
4645 // lookup a matching method in the super class hierarchy
4646 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4647 if (super_m == NULL) {
4648 break; // didn't find any match; get out
4649 }
4650
4651 if (super_m->is_final() && !super_m->is_static() &&
4652 // matching method in super is final, and not static
4653 (Reflection::verify_field_access(this_klass(),
4654 super_m->method_holder(),
4655 super_m->method_holder(),
4656 super_m->access_flags(), false))
4657 // this class can access super final method and therefore override
4658 ) {
4659 ResourceMark rm(THREAD);
4660 Exceptions::fthrow(
4661 THREAD_AND_LOCATION,
4662 vmSymbols::java_lang_VerifyError(),
4663 "class %s overrides final method %s.%s%s",
4664 this_klass->external_name(),
4665 super_m->method_holder()->external_name(),
4666 name->as_C_string(),
4667 signature->as_C_string()
4668 );
4669 return;
4670 }
4671
4672 // continue to look from super_m's holder's super.
4673 k = super_m->method_holder()->super();
4674 continue;
4675 }
4676
4677 k = k->super();
4678 }
4679 }
4680 }
4681 }
4682
4683
4684 // assumes that this_klass is an interface
4685 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4686 assert(this_klass->is_interface(), "not an interface");
4687 Array<Method*>* methods = this_klass->methods();
4688 int num_methods = methods->length();
4689
4690 for (int index = 0; index < num_methods; index++) {
4691 Method* m = methods->at(index);
4692 // if m is static and not the init method, throw a verify error
4693 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4694 ResourceMark rm(THREAD);
4695 Exceptions::fthrow(
4696 THREAD_AND_LOCATION,
4697 vmSymbols::java_lang_VerifyError(),
4698 "Illegal static method %s in interface %s",
4699 m->name()->as_C_string(),
4700 this_klass->external_name()
4701 );
4702 return;
4703 }
4704 }
4705 }
4706
4707 // utility methods for format checking
4708
4709 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4710 if (!_need_verify) { return; }
4711
4712 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4713 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4714 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4715 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4716 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4717 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4718 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4719
4720 if ((is_abstract && is_final) ||
4721 (is_interface && !is_abstract) ||
4722 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4723 (!is_interface && major_gte_15 && is_annotation)) {
4724 ResourceMark rm(THREAD);
4725 Exceptions::fthrow(
4726 THREAD_AND_LOCATION,
4727 vmSymbols::java_lang_ClassFormatError(),
4728 "Illegal class modifiers in class %s: 0x%X",
4729 _class_name->as_C_string(), flags
4730 );
4731 return;
4732 }
4733 }
4734
4735 bool ClassFileParser::has_illegal_visibility(jint flags) {
4736 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4737 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4738 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4739
4740 return ((is_public && is_protected) ||
4741 (is_public && is_private) ||
4742 (is_protected && is_private));
4743 }
4744
4745 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4746 u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4747 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4748 (major <= max_version) &&
4749 ((major != max_version) ||
4750 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4751 }
4752
4753 void ClassFileParser::verify_legal_field_modifiers(
4754 jint flags, bool is_interface, TRAPS) {
4755 if (!_need_verify) { return; }
4756
4757 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4758 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4759 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4760 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4761 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4762 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4763 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4764 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4765 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4766
4767 bool is_illegal = false;
4768
4769 if (is_interface) {
4770 if (!is_public || !is_static || !is_final || is_private ||
4771 is_protected || is_volatile || is_transient ||
4772 (major_gte_15 && is_enum)) {
4773 is_illegal = true;
4774 }
4775 } else { // not interface
4776 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4777 is_illegal = true;
4778 }
4779 }
4780
4781 if (is_illegal) {
4782 ResourceMark rm(THREAD);
4783 Exceptions::fthrow(
4784 THREAD_AND_LOCATION,
4785 vmSymbols::java_lang_ClassFormatError(),
4786 "Illegal field modifiers in class %s: 0x%X",
4787 _class_name->as_C_string(), flags);
4788 return;
4789 }
4790 }
4791
4792 void ClassFileParser::verify_legal_method_modifiers(
4793 jint flags, bool is_interface, Symbol* name, TRAPS) {
4794 if (!_need_verify) { return; }
4795
4796 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4797 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4798 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4799 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4800 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4801 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4802 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4803 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4804 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4805 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4806 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4807 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4808 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4809
4810 bool is_illegal = false;
4811
4812 if (is_interface) {
4813 if (major_gte_8) {
4814 // Class file version is JAVA_8_VERSION or later Methods of
4815 // interfaces may set any of the flags except ACC_PROTECTED,
4816 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4817 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4818 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4819 (is_native || is_protected || is_final || is_synchronized) ||
4820 // If a specific method of a class or interface has its
4821 // ACC_ABSTRACT flag set, it must not have any of its
4822 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4823 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4824 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4825 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4826 (is_abstract && (is_private || is_static || is_strict))) {
4827 is_illegal = true;
4828 }
4829 } else if (major_gte_15) {
4830 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4831 if (!is_public || is_static || is_final || is_synchronized ||
4832 is_native || !is_abstract || is_strict) {
4833 is_illegal = true;
4834 }
4835 } else {
4836 // Class file version is pre-JAVA_1_5_VERSION
4837 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4838 is_illegal = true;
4839 }
4840 }
4841 } else { // not interface
4842 if (has_illegal_visibility(flags)) {
4843 is_illegal = true;
4844 } else {
4845 if (is_initializer) {
4846 if (is_static || is_final || is_synchronized || is_native ||
4847 is_abstract || (major_gte_15 && is_bridge)) {
4848 is_illegal = true;
4849 }
4850 } else { // not initializer
4851 if (is_abstract) {
4852 if ((is_final || is_native || is_private || is_static ||
4853 (major_gte_15 && (is_synchronized || is_strict)))) {
4854 is_illegal = true;
4855 }
4856 }
4857 }
4858 }
4859 }
4860
4861 if (is_illegal) {
4862 ResourceMark rm(THREAD);
4863 Exceptions::fthrow(
4864 THREAD_AND_LOCATION,
4865 vmSymbols::java_lang_ClassFormatError(),
4866 "Method %s in class %s has illegal modifiers: 0x%X",
4867 name->as_C_string(), _class_name->as_C_string(), flags);
4868 return;
4869 }
4870 }
4871
4872 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4873 assert(_need_verify, "only called when _need_verify is true");
4874 int i = 0;
4875 int count = length >> 2;
4876 for (int k=0; k<count; k++) {
4877 unsigned char b0 = buffer[i];
4878 unsigned char b1 = buffer[i+1];
4879 unsigned char b2 = buffer[i+2];
4880 unsigned char b3 = buffer[i+3];
4881 // For an unsigned char v,
4882 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4883 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4884 unsigned char res = b0 | b0 - 1 |
4885 b1 | b1 - 1 |
4886 b2 | b2 - 1 |
4887 b3 | b3 - 1;
4888 if (res >= 128) break;
4889 i += 4;
4890 }
4891 for(; i < length; i++) {
4892 unsigned short c;
4893 // no embedded zeros
4894 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4895 if(buffer[i] < 128) {
4896 continue;
4897 }
4898 if ((i + 5) < length) { // see if it's legal supplementary character
4899 if (UTF8::is_supplementary_character(&buffer[i])) {
4900 c = UTF8::get_supplementary_character(&buffer[i]);
4901 i += 5;
4902 continue;
4903 }
4904 }
4905 switch (buffer[i] >> 4) {
4906 default: break;
4907 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4908 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4909 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4910 c = (buffer[i] & 0x1F) << 6;
4911 i++;
4912 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4913 c += buffer[i] & 0x3F;
4914 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4915 // for classes with major > 47, c must a null or a character in its shortest form
4916 break;
4917 }
4918 }
4919 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4920 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4921 c = (buffer[i] & 0xF) << 12;
4922 i += 2;
4923 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4924 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4925 if (_major_version <= 47 || c >= 0x800) {
4926 // for classes with major > 47, c must be in its shortest form
4927 break;
4928 }
4929 }
4930 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4931 } // end of switch
4932 } // end of for
4933 }
4934
4935 // Checks if name is a legal class name.
4936 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4937 if (!_need_verify || _relax_verify) { return; }
4938
4939 char buf[fixed_buffer_size];
4940 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4941 unsigned int length = name->utf8_length();
4942 bool legal = false;
4943
4944 if (length > 0) {
4945 char* p;
4946 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4947 p = skip_over_field_signature(bytes, false, length, CHECK);
4948 legal = (p != NULL) && ((p - bytes) == (int)length);
4949 } else if (_major_version < JAVA_1_5_VERSION) {
4950 if (bytes[0] != '<') {
4951 p = skip_over_field_name(bytes, true, length);
4952 legal = (p != NULL) && ((p - bytes) == (int)length);
4953 }
4954 } else {
4955 // 4900761: relax the constraints based on JSR202 spec
4956 // Class names may be drawn from the entire Unicode character set.
4957 // Identifiers between '/' must be unqualified names.
4958 // The utf8 string has been verified when parsing cpool entries.
4959 legal = verify_unqualified_name(bytes, length, LegalClass);
4960 }
4961 }
4962 if (!legal) {
4963 ResourceMark rm(THREAD);
4964 Exceptions::fthrow(
4965 THREAD_AND_LOCATION,
4966 vmSymbols::java_lang_ClassFormatError(),
4967 "Illegal class name \"%s\" in class file %s", bytes,
4968 _class_name->as_C_string()
4969 );
4970 return;
4971 }
4972 }
4973
4974 // Checks if name is a legal field name.
4975 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4976 if (!_need_verify || _relax_verify) { return; }
4977
4978 char buf[fixed_buffer_size];
4979 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4980 unsigned int length = name->utf8_length();
4981 bool legal = false;
4982
4983 if (length > 0) {
4984 if (_major_version < JAVA_1_5_VERSION) {
4985 if (bytes[0] != '<') {
4986 char* p = skip_over_field_name(bytes, false, length);
4987 legal = (p != NULL) && ((p - bytes) == (int)length);
4988 }
4989 } else {
4990 // 4881221: relax the constraints based on JSR202 spec
4991 legal = verify_unqualified_name(bytes, length, LegalField);
4992 }
4993 }
4994
4995 if (!legal) {
4996 ResourceMark rm(THREAD);
4997 Exceptions::fthrow(
4998 THREAD_AND_LOCATION,
4999 vmSymbols::java_lang_ClassFormatError(),
5000 "Illegal field name \"%s\" in class %s", bytes,
5001 _class_name->as_C_string()
5002 );
5003 return;
5004 }
5005 }
5006
5007 // Checks if name is a legal method name.
5008 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
5009 if (!_need_verify || _relax_verify) { return; }
5010
5011 assert(name != NULL, "method name is null");
5012 char buf[fixed_buffer_size];
5013 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5014 unsigned int length = name->utf8_length();
5015 bool legal = false;
5016
5017 if (length > 0) {
5018 if (bytes[0] == '<') {
5019 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5020 legal = true;
5021 }
5022 } else if (_major_version < JAVA_1_5_VERSION) {
5023 char* p;
5024 p = skip_over_field_name(bytes, false, length);
5025 legal = (p != NULL) && ((p - bytes) == (int)length);
5026 } else {
5027 // 4881221: relax the constraints based on JSR202 spec
5028 legal = verify_unqualified_name(bytes, length, LegalMethod);
5029 }
5030 }
5031
5032 if (!legal) {
5033 ResourceMark rm(THREAD);
5034 Exceptions::fthrow(
5035 THREAD_AND_LOCATION,
5036 vmSymbols::java_lang_ClassFormatError(),
5037 "Illegal method name \"%s\" in class %s", bytes,
5038 _class_name->as_C_string()
5039 );
5040 return;
5041 }
5042 }
5043
5044
5045 // Checks if signature is a legal field signature.
5046 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
5047 if (!_need_verify) { return; }
5048
5049 char buf[fixed_buffer_size];
5050 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5051 unsigned int length = signature->utf8_length();
5052 char* p = skip_over_field_signature(bytes, false, length, CHECK);
5053
5054 if (p == NULL || (p - bytes) != (int)length) {
5055 throwIllegalSignature("Field", name, signature, CHECK);
5056 }
5057 }
5058
5059 // Checks if signature is a legal method signature.
5060 // Returns number of parameters
5061 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
5062 if (!_need_verify) {
5063 // make sure caller's args_size will be less than 0 even for non-static
5064 // method so it will be recomputed in compute_size_of_parameters().
5065 return -2;
5066 }
5067
5068 unsigned int args_size = 0;
5069 char buf[fixed_buffer_size];
5070 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5071 unsigned int length = signature->utf8_length();
5072 char* nextp;
5073
5074 // The first character must be a '('
5075 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5076 length--;
5077 // Skip over legal field signatures
5078 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5079 while ((length > 0) && (nextp != NULL)) {
5080 args_size++;
5081 if (p[0] == 'J' || p[0] == 'D') {
5082 args_size++;
5083 }
5084 length -= nextp - p;
5085 p = nextp;
5086 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5087 }
5088 // The first non-signature thing better be a ')'
5089 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5090 length--;
5091 if (name == vmSymbols::object_initializer_name()) {
5092 // All "<init>" methods must return void
5093 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5094 return args_size;
5095 }
5096 } else {
5097 // Now we better just have a return value
5098 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5099 if (nextp && ((int)length == (nextp - p))) {
5100 return args_size;
5101 }
5102 }
5103 }
5104 }
5105 // Report error
5106 throwIllegalSignature("Method", name, signature, CHECK_0);
5107 return 0;
5108 }
5109
5110
5111 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5112 // Method names also may not contain the characters '<' or '>', unless <init>
5113 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5114 // method. Because these names have been checked as special cases before
5115 // calling this method in verify_legal_method_name.
5116 bool ClassFileParser::verify_unqualified_name(
5117 char* name, unsigned int length, int type) {
5118 jchar ch;
5119
5120 for (char* p = name; p != name + length; ) {
5121 ch = *p;
5122 if (ch < 128) {
5123 p++;
5124 if (ch == '.' || ch == ';' || ch == '[' ) {
5125 return false; // do not permit '.', ';', or '['
5126 }
5127 if (type != LegalClass && ch == '/') {
5128 return false; // do not permit '/' unless it's class name
5129 }
5130 if (type == LegalMethod && (ch == '<' || ch == '>')) {
5131 return false; // do not permit '<' or '>' in method names
5132 }
5133 } else {
5134 char* tmp_p = UTF8::next(p, &ch);
5135 p = tmp_p;
5136 }
5137 }
5138 return true;
5139 }
5140
5141
5142 // Take pointer to a string. Skip over the longest part of the string that could
5143 // be taken as a fieldname. Allow '/' if slash_ok is true.
5144 // Return a pointer to just past the fieldname.
5145 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5146 // being true, we saw consecutive slashes (meaning we were looking for a
5147 // qualified path but found something that was badly-formed).
5148 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
5149 char* p;
5150 jchar ch;
5151 jboolean last_is_slash = false;
5152 jboolean not_first_ch = false;
5153
5154 for (p = name; p != name + length; not_first_ch = true) {
5155 char* old_p = p;
5156 ch = *p;
5157 if (ch < 128) {
5158 p++;
5159 // quick check for ascii
5160 if ((ch >= 'a' && ch <= 'z') ||
5161 (ch >= 'A' && ch <= 'Z') ||
5162 (ch == '_' || ch == '$') ||
5163 (not_first_ch && ch >= '0' && ch <= '9')) {
5164 last_is_slash = false;
5165 continue;
5166 }
5167 if (slash_ok && ch == '/') {
5168 if (last_is_slash) {
5169 return NULL; // Don't permit consecutive slashes
5170 }
5171 last_is_slash = true;
5172 continue;
5173 }
5174 } else {
5175 jint unicode_ch;
5176 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5177 p = tmp_p;
5178 last_is_slash = false;
5179 // Check if ch is Java identifier start or is Java identifier part
5180 // 4672820: call java.lang.Character methods directly without generating separate tables.
5181 EXCEPTION_MARK;
5182 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
5183
5184 // return value
5185 JavaValue result(T_BOOLEAN);
5186 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5187 JavaCallArguments args;
5188 args.push_int(unicode_ch);
5189
5190 // public static boolean isJavaIdentifierStart(char ch);
5191 JavaCalls::call_static(&result,
5192 klass,
5193 vmSymbols::isJavaIdentifierStart_name(),
5194 vmSymbols::int_bool_signature(),
5195 &args,
5196 THREAD);
5197
5198 if (HAS_PENDING_EXCEPTION) {
5199 CLEAR_PENDING_EXCEPTION;
5200 return 0;
5201 }
5202 if (result.get_jboolean()) {
5203 continue;
5204 }
5205
5206 if (not_first_ch) {
5207 // public static boolean isJavaIdentifierPart(char ch);
5208 JavaCalls::call_static(&result,
5209 klass,
5210 vmSymbols::isJavaIdentifierPart_name(),
5211 vmSymbols::int_bool_signature(),
5212 &args,
5213 THREAD);
5214
5215 if (HAS_PENDING_EXCEPTION) {
5216 CLEAR_PENDING_EXCEPTION;
5217 return 0;
5218 }
5219
5220 if (result.get_jboolean()) {
5221 continue;
5222 }
5223 }
5224 }
5225 return (not_first_ch) ? old_p : NULL;
5226 }
5227 return (not_first_ch) ? p : NULL;
5228 }
5229
5230
5231 // Take pointer to a string. Skip over the longest part of the string that could
5232 // be taken as a field signature. Allow "void" if void_ok.
5233 // Return a pointer to just past the signature.
5234 // Return NULL if no legal signature is found.
5235 char* ClassFileParser::skip_over_field_signature(char* signature,
5236 bool void_ok,
5237 unsigned int length,
5238 TRAPS) {
5239 unsigned int array_dim = 0;
5240 while (length > 0) {
5241 switch (signature[0]) {
5242 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5243 case JVM_SIGNATURE_BOOLEAN:
5244 case JVM_SIGNATURE_BYTE:
5245 case JVM_SIGNATURE_CHAR:
5246 case JVM_SIGNATURE_SHORT:
5247 case JVM_SIGNATURE_INT:
5248 case JVM_SIGNATURE_FLOAT:
5249 case JVM_SIGNATURE_LONG:
5250 case JVM_SIGNATURE_DOUBLE:
5251 return signature + 1;
5252 case JVM_SIGNATURE_CLASS: {
5253 if (_major_version < JAVA_1_5_VERSION) {
5254 // Skip over the class name if one is there
5255 char* p = skip_over_field_name(signature + 1, true, --length);
5256
5257 // The next character better be a semicolon
5258 if (p && (p - signature) > 1 && p[0] == ';') {
5259 return p + 1;
5260 }
5261 } else {
5262 // 4900761: For class version > 48, any unicode is allowed in class name.
5263 length--;
5264 signature++;
5265 while (length > 0 && signature[0] != ';') {
5266 if (signature[0] == '.') {
5267 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
5268 }
5269 length--;
5270 signature++;
5271 }
5272 if (signature[0] == ';') { return signature + 1; }
5273 }
5274
5275 return NULL;
5276 }
5277 case JVM_SIGNATURE_ARRAY:
5278 array_dim++;
5279 if (array_dim > 255) {
5280 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5281 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5282 }
5283 // The rest of what's there better be a legal signature
5284 signature++;
5285 length--;
5286 void_ok = false;
5287 break;
5288
5289 default:
5290 return NULL;
5291 }
5292 }
5293 return NULL;
5294 }