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(jdk_internal_HotSpotIntrinsicCandidate_signature):
1755 if (_location != _in_method) break; // only allow for methods
1756 if (!privileged) break; // only allow in privileged code
1757 return _method_HotSpotIntrinsicCandidate;
1758 #if INCLUDE_JVMCI
1759 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_vm_ci_hotspot_Stable_signature):
1760 if (_location != _in_field) break; // only allow for fields
1761 if (!privileged) break; // only allow in privileged code
1762 return _field_Stable;
1763 #endif
1764 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_Stable_signature):
1765 if (_location != _in_field) break; // only allow for fields
1766 if (!privileged) break; // only allow in privileged code
1767 return _field_Stable;
1768 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_misc_Contended_signature):
1769 if (_location != _in_field && _location != _in_class) break; // only allow for fields and classes
1770 if (!EnableContended || (RestrictContended && !privileged)) break; // honor privileges
1771 return _sun_misc_Contended;
1772 default: break;
1773 }
1774 return AnnotationCollector::_unknown;
1775 }
1776
1777 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1778 if (is_contended())
1779 f->set_contended_group(contended_group());
1780 if (is_stable())
1781 f->set_stable(true);
1782 }
1783
1784 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
1785 // If there's an error deallocate metadata for field annotations
1786 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
1787 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
1788 }
1789
1790 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1791 if (has_annotation(_method_CallerSensitive))
1792 m->set_caller_sensitive(true);
1793 if (has_annotation(_method_ForceInline))
1794 m->set_force_inline(true);
1795 if (has_annotation(_method_DontInline))
1796 m->set_dont_inline(true);
1797 if (has_annotation(_method_InjectedProfile))
1798 m->set_has_injected_profile(true);
1799 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1800 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1801 if (has_annotation(_method_LambdaForm_Hidden))
1802 m->set_hidden(true);
1803 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
1804 m->set_intrinsic_candidate(true);
1805 }
1806
1807 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1808 k->set_is_contended(is_contended());
1809 }
1810
1811
1812 #define MAX_ARGS_SIZE 255
1813 #define MAX_CODE_SIZE 65535
1814 #define INITIAL_MAX_LVT_NUMBER 256
1815
1816 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1817 *
1818 * Rules for LVT's and LVTT's are:
1819 * - There can be any number of LVT's and LVTT's.
1820 * - If there are n LVT's, it is the same as if there was just
1821 * one LVT containing all the entries from the n LVT's.
1822 * - There may be no more than one LVT entry per local variable.
1823 * Two LVT entries are 'equal' if these fields are the same:
1824 * start_pc, length, name, slot
1825 * - There may be no more than one LVTT entry per each LVT entry.
1826 * Each LVTT entry has to match some LVT entry.
1827 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
1828 */
1829 void ClassFileParser::copy_localvariable_table(ConstMethod* cm,
1830 int lvt_cnt,
1831 u2* localvariable_table_length,
1832 u2** localvariable_table_start,
1833 int lvtt_cnt,
1834 u2* localvariable_type_table_length,
1835 u2** localvariable_type_table_start,
1836 TRAPS) {
1837
1838 ResourceMark rm(THREAD);
1839
1840 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
1841 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
1842
1843 LVT_HashTable* table = new LVT_HashTable();
1844
1845 // To fill LocalVariableTable in
1846 Classfile_LVT_Element* cf_lvt;
1847 LocalVariableTableElement* lvt = cm->localvariable_table_start();
1848
1849 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
1850 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
1851 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
1852 copy_lvt_element(&cf_lvt[idx], lvt);
1853 // If no duplicates, add LVT elem in hashtable.
1854 if (table->put(*lvt, lvt) == false
1855 && _need_verify
1856 && _major_version >= JAVA_1_5_VERSION) {
1857 classfile_parse_error("Duplicated LocalVariableTable attribute "
1858 "entry for '%s' in class file %s",
1859 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
1860 CHECK);
1861 }
1862 }
1863 }
1864
1865 // To merge LocalVariableTable and LocalVariableTypeTable
1866 Classfile_LVT_Element* cf_lvtt;
1867 LocalVariableTableElement lvtt_elem;
1868
1869 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
1870 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
1871 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
1872 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
1873 LocalVariableTableElement** entry = table->get(lvtt_elem);
1874 if (entry == NULL) {
1875 if (_need_verify) {
1876 classfile_parse_error("LVTT entry for '%s' in class file %s "
1877 "does not match any LVT entry",
1878 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1879 CHECK);
1880 }
1881 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
1882 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
1883 "entry for '%s' in class file %s",
1884 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1885 CHECK);
1886 } else {
1887 // to add generic signatures into LocalVariableTable
1888 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
1889 }
1890 }
1891 }
1892 }
1893
1894
1895 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
1896 u1* runtime_visible_annotations,
1897 int runtime_visible_annotations_length,
1898 u1* runtime_invisible_annotations,
1899 int runtime_invisible_annotations_length,
1900 u1* runtime_visible_parameter_annotations,
1901 int runtime_visible_parameter_annotations_length,
1902 u1* runtime_invisible_parameter_annotations,
1903 int runtime_invisible_parameter_annotations_length,
1904 u1* runtime_visible_type_annotations,
1905 int runtime_visible_type_annotations_length,
1906 u1* runtime_invisible_type_annotations,
1907 int runtime_invisible_type_annotations_length,
1908 u1* annotation_default,
1909 int annotation_default_length,
1910 TRAPS) {
1911
1912 AnnotationArray* a;
1913
1914 if (runtime_visible_annotations_length +
1915 runtime_invisible_annotations_length > 0) {
1916 a = assemble_annotations(runtime_visible_annotations,
1917 runtime_visible_annotations_length,
1918 runtime_invisible_annotations,
1919 runtime_invisible_annotations_length,
1920 CHECK);
1921 cm->set_method_annotations(a);
1922 }
1923
1924 if (runtime_visible_parameter_annotations_length +
1925 runtime_invisible_parameter_annotations_length > 0) {
1926 a = assemble_annotations(runtime_visible_parameter_annotations,
1927 runtime_visible_parameter_annotations_length,
1928 runtime_invisible_parameter_annotations,
1929 runtime_invisible_parameter_annotations_length,
1930 CHECK);
1931 cm->set_parameter_annotations(a);
1932 }
1933
1934 if (annotation_default_length > 0) {
1935 a = assemble_annotations(annotation_default,
1936 annotation_default_length,
1937 NULL,
1938 0,
1939 CHECK);
1940 cm->set_default_annotations(a);
1941 }
1942
1943 if (runtime_visible_type_annotations_length +
1944 runtime_invisible_type_annotations_length > 0) {
1945 a = assemble_annotations(runtime_visible_type_annotations,
1946 runtime_visible_type_annotations_length,
1947 runtime_invisible_type_annotations,
1948 runtime_invisible_type_annotations_length,
1949 CHECK);
1950 cm->set_type_annotations(a);
1951 }
1952 }
1953
1954
1955 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1956 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
1957 // Method* to save footprint, so we only know the size of the resulting Method* when the
1958 // entire method attribute is parsed.
1959 //
1960 // The promoted_flags parameter is used to pass relevant access_flags
1961 // from the method back up to the containing klass. These flag values
1962 // are added to klass's access_flags.
1963
1964 methodHandle ClassFileParser::parse_method(bool is_interface,
1965 AccessFlags *promoted_flags,
1966 TRAPS) {
1967 ClassFileStream* cfs = stream();
1968 methodHandle nullHandle;
1969 ResourceMark rm(THREAD);
1970 // Parse fixed parts
1971 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1972
1973 int flags = cfs->get_u2_fast();
1974 u2 name_index = cfs->get_u2_fast();
1975 int cp_size = _cp->length();
1976 check_property(
1977 valid_symbol_at(name_index),
1978 "Illegal constant pool index %u for method name in class file %s",
1979 name_index, CHECK_(nullHandle));
1980 Symbol* name = _cp->symbol_at(name_index);
1981 verify_legal_method_name(name, CHECK_(nullHandle));
1982
1983 u2 signature_index = cfs->get_u2_fast();
1984 guarantee_property(
1985 valid_symbol_at(signature_index),
1986 "Illegal constant pool index %u for method signature in class file %s",
1987 signature_index, CHECK_(nullHandle));
1988 Symbol* signature = _cp->symbol_at(signature_index);
1989
1990 AccessFlags access_flags;
1991 if (name == vmSymbols::class_initializer_name()) {
1992 // We ignore the other access flags for a valid class initializer.
1993 // (JVM Spec 2nd ed., chapter 4.6)
1994 if (_major_version < 51) { // backward compatibility
1995 flags = JVM_ACC_STATIC;
1996 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1997 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1998 } else {
1999 // As of major_version 51, a method named <clinit> without ACC_STATIC is
2000 // just another method. So, do a normal method modifer check.
2001 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
2002 }
2003 } else {
2004 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
2005 }
2006
2007 int args_size = -1; // only used when _need_verify is true
2008 if (_need_verify) {
2009 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2010 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
2011 if (args_size > MAX_ARGS_SIZE) {
2012 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
2013 }
2014 }
2015
2016 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2017
2018 // Default values for code and exceptions attribute elements
2019 u2 max_stack = 0;
2020 u2 max_locals = 0;
2021 u4 code_length = 0;
2022 u1* code_start = 0;
2023 u2 exception_table_length = 0;
2024 u2* exception_table_start = NULL;
2025 Array<int>* exception_handlers = Universe::the_empty_int_array();
2026 u2 checked_exceptions_length = 0;
2027 u2* checked_exceptions_start = NULL;
2028 CompressedLineNumberWriteStream* linenumber_table = NULL;
2029 int linenumber_table_length = 0;
2030 int total_lvt_length = 0;
2031 u2 lvt_cnt = 0;
2032 u2 lvtt_cnt = 0;
2033 bool lvt_allocated = false;
2034 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2035 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2036 u2* localvariable_table_length = NULL;
2037 u2** localvariable_table_start = NULL;
2038 u2* localvariable_type_table_length = NULL;
2039 u2** localvariable_type_table_start = NULL;
2040 int method_parameters_length = -1;
2041 u1* method_parameters_data = NULL;
2042 bool method_parameters_seen = false;
2043 bool parsed_code_attribute = false;
2044 bool parsed_checked_exceptions_attribute = false;
2045 bool parsed_stackmap_attribute = false;
2046 // stackmap attribute - JDK1.5
2047 u1* stackmap_data = NULL;
2048 int stackmap_data_length = 0;
2049 u2 generic_signature_index = 0;
2050 MethodAnnotationCollector parsed_annotations;
2051 u1* runtime_visible_annotations = NULL;
2052 int runtime_visible_annotations_length = 0;
2053 u1* runtime_invisible_annotations = NULL;
2054 int runtime_invisible_annotations_length = 0;
2055 u1* runtime_visible_parameter_annotations = NULL;
2056 int runtime_visible_parameter_annotations_length = 0;
2057 u1* runtime_invisible_parameter_annotations = NULL;
2058 int runtime_invisible_parameter_annotations_length = 0;
2059 u1* runtime_visible_type_annotations = NULL;
2060 int runtime_visible_type_annotations_length = 0;
2061 u1* runtime_invisible_type_annotations = NULL;
2062 int runtime_invisible_type_annotations_length = 0;
2063 bool runtime_invisible_annotations_exists = false;
2064 bool runtime_invisible_type_annotations_exists = false;
2065 bool runtime_invisible_parameter_annotations_exists = false;
2066 u1* annotation_default = NULL;
2067 int annotation_default_length = 0;
2068
2069 // Parse code and exceptions attribute
2070 u2 method_attributes_count = cfs->get_u2_fast();
2071 while (method_attributes_count--) {
2072 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
2073 u2 method_attribute_name_index = cfs->get_u2_fast();
2074 u4 method_attribute_length = cfs->get_u4_fast();
2075 check_property(
2076 valid_symbol_at(method_attribute_name_index),
2077 "Invalid method attribute name index %u in class file %s",
2078 method_attribute_name_index, CHECK_(nullHandle));
2079
2080 Symbol* method_attribute_name = _cp->symbol_at(method_attribute_name_index);
2081 if (method_attribute_name == vmSymbols::tag_code()) {
2082 // Parse Code attribute
2083 if (_need_verify) {
2084 guarantee_property(
2085 !access_flags.is_native() && !access_flags.is_abstract(),
2086 "Code attribute in native or abstract methods in class file %s",
2087 CHECK_(nullHandle));
2088 }
2089 if (parsed_code_attribute) {
2090 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
2091 }
2092 parsed_code_attribute = true;
2093
2094 // Stack size, locals size, and code size
2095 if (_major_version == 45 && _minor_version <= 2) {
2096 cfs->guarantee_more(4, CHECK_(nullHandle));
2097 max_stack = cfs->get_u1_fast();
2098 max_locals = cfs->get_u1_fast();
2099 code_length = cfs->get_u2_fast();
2100 } else {
2101 cfs->guarantee_more(8, CHECK_(nullHandle));
2102 max_stack = cfs->get_u2_fast();
2103 max_locals = cfs->get_u2_fast();
2104 code_length = cfs->get_u4_fast();
2105 }
2106 if (_need_verify) {
2107 guarantee_property(args_size <= max_locals,
2108 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
2109 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2110 "Invalid method Code length %u in class file %s",
2111 code_length, CHECK_(nullHandle));
2112 }
2113 // Code pointer
2114 code_start = cfs->get_u1_buffer();
2115 assert(code_start != NULL, "null code start");
2116 cfs->guarantee_more(code_length, CHECK_(nullHandle));
2117 cfs->skip_u1_fast(code_length);
2118
2119 // Exception handler table
2120 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
2121 exception_table_length = cfs->get_u2_fast();
2122 if (exception_table_length > 0) {
2123 exception_table_start =
2124 parse_exception_table(code_length, exception_table_length, CHECK_(nullHandle));
2125 }
2126
2127 // Parse additional attributes in code attribute
2128 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
2129 u2 code_attributes_count = cfs->get_u2_fast();
2130
2131 unsigned int calculated_attribute_length = 0;
2132
2133 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2134 calculated_attribute_length =
2135 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2136 } else {
2137 // max_stack, locals and length are smaller in pre-version 45.2 classes
2138 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2139 }
2140 calculated_attribute_length +=
2141 code_length +
2142 sizeof(exception_table_length) +
2143 sizeof(code_attributes_count) +
2144 exception_table_length *
2145 ( sizeof(u2) + // start_pc
2146 sizeof(u2) + // end_pc
2147 sizeof(u2) + // handler_pc
2148 sizeof(u2) ); // catch_type_index
2149
2150 while (code_attributes_count--) {
2151 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
2152 u2 code_attribute_name_index = cfs->get_u2_fast();
2153 u4 code_attribute_length = cfs->get_u4_fast();
2154 calculated_attribute_length += code_attribute_length +
2155 sizeof(code_attribute_name_index) +
2156 sizeof(code_attribute_length);
2157 check_property(valid_symbol_at(code_attribute_name_index),
2158 "Invalid code attribute name index %u in class file %s",
2159 code_attribute_name_index,
2160 CHECK_(nullHandle));
2161 if (LoadLineNumberTables &&
2162 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2163 // Parse and compress line number table
2164 parse_linenumber_table(code_attribute_length, code_length,
2165 &linenumber_table, CHECK_(nullHandle));
2166
2167 } else if (LoadLocalVariableTables &&
2168 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2169 // Parse local variable table
2170 if (!lvt_allocated) {
2171 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2172 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2173 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2174 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2175 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2176 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2177 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2178 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2179 lvt_allocated = true;
2180 }
2181 if (lvt_cnt == max_lvt_cnt) {
2182 max_lvt_cnt <<= 1;
2183 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2184 localvariable_table_start = REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2185 }
2186 localvariable_table_start[lvt_cnt] =
2187 parse_localvariable_table(code_length,
2188 max_locals,
2189 code_attribute_length,
2190 &localvariable_table_length[lvt_cnt],
2191 false, // is not LVTT
2192 CHECK_(nullHandle));
2193 total_lvt_length += localvariable_table_length[lvt_cnt];
2194 lvt_cnt++;
2195 } else if (LoadLocalVariableTypeTables &&
2196 _major_version >= JAVA_1_5_VERSION &&
2197 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2198 if (!lvt_allocated) {
2199 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2200 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2201 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2202 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2203 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2204 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2205 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2206 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2207 lvt_allocated = true;
2208 }
2209 // Parse local variable type table
2210 if (lvtt_cnt == max_lvtt_cnt) {
2211 max_lvtt_cnt <<= 1;
2212 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2213 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2214 }
2215 localvariable_type_table_start[lvtt_cnt] =
2216 parse_localvariable_table(code_length,
2217 max_locals,
2218 code_attribute_length,
2219 &localvariable_type_table_length[lvtt_cnt],
2220 true, // is LVTT
2221 CHECK_(nullHandle));
2222 lvtt_cnt++;
2223 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2224 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2225 // Stack map is only needed by the new verifier in JDK1.5.
2226 if (parsed_stackmap_attribute) {
2227 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2228 }
2229 stackmap_data = parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
2230 stackmap_data_length = code_attribute_length;
2231 parsed_stackmap_attribute = true;
2232 } else {
2233 // Skip unknown attributes
2234 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2235 }
2236 }
2237 // check method attribute length
2238 if (_need_verify) {
2239 guarantee_property(method_attribute_length == calculated_attribute_length,
2240 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2241 }
2242 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2243 // Parse Exceptions attribute
2244 if (parsed_checked_exceptions_attribute) {
2245 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2246 }
2247 parsed_checked_exceptions_attribute = true;
2248 checked_exceptions_start =
2249 parse_checked_exceptions(&checked_exceptions_length,
2250 method_attribute_length,
2251 CHECK_(nullHandle));
2252 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2253 // reject multiple method parameters
2254 if (method_parameters_seen) {
2255 classfile_parse_error("Multiple MethodParameters attributes in class file %s", CHECK_(nullHandle));
2256 }
2257 method_parameters_seen = true;
2258 method_parameters_length = cfs->get_u1_fast();
2259 const u2 real_length = (method_parameters_length * 4u) + 1u;
2260 if (method_attribute_length != real_length) {
2261 classfile_parse_error(
2262 "Invalid MethodParameters method attribute length %u in class file",
2263 method_attribute_length, CHECK_(nullHandle));
2264 }
2265 method_parameters_data = cfs->get_u1_buffer();
2266 cfs->skip_u2_fast(method_parameters_length);
2267 cfs->skip_u2_fast(method_parameters_length);
2268 // ignore this attribute if it cannot be reflected
2269 if (!SystemDictionary::Parameter_klass_loaded())
2270 method_parameters_length = -1;
2271 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2272 if (method_attribute_length != 0) {
2273 classfile_parse_error(
2274 "Invalid Synthetic method attribute length %u in class file %s",
2275 method_attribute_length, CHECK_(nullHandle));
2276 }
2277 // Should we check that there hasn't already been a synthetic attribute?
2278 access_flags.set_is_synthetic();
2279 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2280 if (method_attribute_length != 0) {
2281 classfile_parse_error(
2282 "Invalid Deprecated method attribute length %u in class file %s",
2283 method_attribute_length, CHECK_(nullHandle));
2284 }
2285 } else if (_major_version >= JAVA_1_5_VERSION) {
2286 if (method_attribute_name == vmSymbols::tag_signature()) {
2287 if (method_attribute_length != 2) {
2288 classfile_parse_error(
2289 "Invalid Signature attribute length %u in class file %s",
2290 method_attribute_length, CHECK_(nullHandle));
2291 }
2292 generic_signature_index = parse_generic_signature_attribute(CHECK_(nullHandle));
2293 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2294 if (runtime_visible_annotations != NULL) {
2295 classfile_parse_error(
2296 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2297 }
2298 runtime_visible_annotations_length = method_attribute_length;
2299 runtime_visible_annotations = cfs->get_u1_buffer();
2300 assert(runtime_visible_annotations != NULL, "null visible annotations");
2301 parse_annotations(runtime_visible_annotations,
2302 runtime_visible_annotations_length, &parsed_annotations);
2303 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2304 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2305 if (runtime_invisible_annotations_exists) {
2306 classfile_parse_error(
2307 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2308 }
2309 runtime_invisible_annotations_exists = true;
2310 if (PreserveAllAnnotations) {
2311 runtime_invisible_annotations_length = method_attribute_length;
2312 runtime_invisible_annotations = cfs->get_u1_buffer();
2313 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2314 }
2315 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2316 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2317 if (runtime_visible_parameter_annotations != NULL) {
2318 classfile_parse_error(
2319 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2320 }
2321 runtime_visible_parameter_annotations_length = method_attribute_length;
2322 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2323 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2324 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2325 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2326 if (runtime_invisible_parameter_annotations_exists) {
2327 classfile_parse_error(
2328 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2329 }
2330 runtime_invisible_parameter_annotations_exists = true;
2331 if (PreserveAllAnnotations) {
2332 runtime_invisible_parameter_annotations_length = method_attribute_length;
2333 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2334 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2335 }
2336 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2337 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2338 if (annotation_default != NULL) {
2339 classfile_parse_error(
2340 "Multiple AnnotationDefault attributes for method in class file %s",
2341 CHECK_(nullHandle));
2342 }
2343 annotation_default_length = method_attribute_length;
2344 annotation_default = cfs->get_u1_buffer();
2345 assert(annotation_default != NULL, "null annotation default");
2346 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2347 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2348 if (runtime_visible_type_annotations != NULL) {
2349 classfile_parse_error(
2350 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2351 CHECK_(nullHandle));
2352 }
2353 runtime_visible_type_annotations_length = method_attribute_length;
2354 runtime_visible_type_annotations = cfs->get_u1_buffer();
2355 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2356 // No need for the VM to parse Type annotations
2357 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_(nullHandle));
2358 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2359 if (runtime_invisible_type_annotations_exists) {
2360 classfile_parse_error(
2361 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2362 CHECK_(nullHandle));
2363 } else {
2364 runtime_invisible_type_annotations_exists = true;
2365 }
2366 if (PreserveAllAnnotations) {
2367 runtime_invisible_type_annotations_length = method_attribute_length;
2368 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2369 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2370 }
2371 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2372 } else {
2373 // Skip unknown attributes
2374 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2375 }
2376 } else {
2377 // Skip unknown attributes
2378 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2379 }
2380 }
2381
2382 if (linenumber_table != NULL) {
2383 linenumber_table->write_terminator();
2384 linenumber_table_length = linenumber_table->position();
2385 }
2386
2387 // Make sure there's at least one Code attribute in non-native/non-abstract method
2388 if (_need_verify) {
2389 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2390 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2391 }
2392
2393 // All sizing information for a Method* is finally available, now create it
2394 InlineTableSizes sizes(
2395 total_lvt_length,
2396 linenumber_table_length,
2397 exception_table_length,
2398 checked_exceptions_length,
2399 method_parameters_length,
2400 generic_signature_index,
2401 runtime_visible_annotations_length +
2402 runtime_invisible_annotations_length,
2403 runtime_visible_parameter_annotations_length +
2404 runtime_invisible_parameter_annotations_length,
2405 runtime_visible_type_annotations_length +
2406 runtime_invisible_type_annotations_length,
2407 annotation_default_length,
2408 0);
2409
2410 Method* m = Method::allocate(
2411 _loader_data, code_length, access_flags, &sizes,
2412 ConstMethod::NORMAL, CHECK_(nullHandle));
2413
2414 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2415
2416 // Fill in information from fixed part (access_flags already set)
2417 m->set_constants(_cp);
2418 m->set_name_index(name_index);
2419 m->set_signature_index(signature_index);
2420 #ifdef CC_INTERP
2421 // hmm is there a gc issue here??
2422 ResultTypeFinder rtf(_cp->symbol_at(signature_index));
2423 m->set_result_index(rtf.type());
2424 #endif
2425
2426 if (args_size >= 0) {
2427 m->set_size_of_parameters(args_size);
2428 } else {
2429 m->compute_size_of_parameters(THREAD);
2430 }
2431 #ifdef ASSERT
2432 if (args_size >= 0) {
2433 m->compute_size_of_parameters(THREAD);
2434 assert(args_size == m->size_of_parameters(), "");
2435 }
2436 #endif
2437
2438 // Fill in code attribute information
2439 m->set_max_stack(max_stack);
2440 m->set_max_locals(max_locals);
2441 if (stackmap_data != NULL) {
2442 m->constMethod()->copy_stackmap_data(_loader_data, stackmap_data,
2443 stackmap_data_length, CHECK_NULL);
2444 }
2445
2446 // Copy byte codes
2447 m->set_code(code_start);
2448
2449 // Copy line number table
2450 if (linenumber_table != NULL) {
2451 memcpy(m->compressed_linenumber_table(),
2452 linenumber_table->buffer(), linenumber_table_length);
2453 }
2454
2455 // Copy exception table
2456 if (exception_table_length > 0) {
2457 int size =
2458 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2459 copy_u2_with_conversion((u2*) m->exception_table_start(),
2460 exception_table_start, size);
2461 }
2462
2463 // Copy method parameters
2464 if (method_parameters_length > 0) {
2465 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2466 for (int i = 0; i < method_parameters_length; i++) {
2467 elem[i].name_cp_index = Bytes::get_Java_u2(method_parameters_data);
2468 method_parameters_data += 2;
2469 elem[i].flags = Bytes::get_Java_u2(method_parameters_data);
2470 method_parameters_data += 2;
2471 }
2472 }
2473
2474 // Copy checked exceptions
2475 if (checked_exceptions_length > 0) {
2476 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2477 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2478 }
2479
2480 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2481 if (total_lvt_length > 0) {
2482 promoted_flags->set_has_localvariable_table();
2483 copy_localvariable_table(m->constMethod(), lvt_cnt,
2484 localvariable_table_length,
2485 localvariable_table_start,
2486 lvtt_cnt,
2487 localvariable_type_table_length,
2488 localvariable_type_table_start, CHECK_NULL);
2489 }
2490
2491 if (parsed_annotations.has_any_annotations())
2492 parsed_annotations.apply_to(m);
2493
2494 // Copy annotations
2495 copy_method_annotations(m->constMethod(),
2496 runtime_visible_annotations,
2497 runtime_visible_annotations_length,
2498 runtime_invisible_annotations,
2499 runtime_invisible_annotations_length,
2500 runtime_visible_parameter_annotations,
2501 runtime_visible_parameter_annotations_length,
2502 runtime_invisible_parameter_annotations,
2503 runtime_invisible_parameter_annotations_length,
2504 runtime_visible_type_annotations,
2505 runtime_visible_type_annotations_length,
2506 runtime_invisible_type_annotations,
2507 runtime_invisible_type_annotations_length,
2508 annotation_default,
2509 annotation_default_length,
2510 CHECK_NULL);
2511
2512 if (name == vmSymbols::finalize_method_name() &&
2513 signature == vmSymbols::void_method_signature()) {
2514 if (m->is_empty_method()) {
2515 _has_empty_finalizer = true;
2516 } else {
2517 _has_finalizer = true;
2518 }
2519 }
2520 if (name == vmSymbols::object_initializer_name() &&
2521 signature == vmSymbols::void_method_signature() &&
2522 m->is_vanilla_constructor()) {
2523 _has_vanilla_constructor = true;
2524 }
2525
2526 NOT_PRODUCT(m->verify());
2527 return m;
2528 }
2529
2530
2531 // The promoted_flags parameter is used to pass relevant access_flags
2532 // from the methods back up to the containing klass. These flag values
2533 // are added to klass's access_flags.
2534
2535 Array<Method*>* ClassFileParser::parse_methods(bool is_interface,
2536 AccessFlags* promoted_flags,
2537 bool* has_final_method,
2538 bool* declares_default_methods,
2539 TRAPS) {
2540 ClassFileStream* cfs = stream();
2541 cfs->guarantee_more(2, CHECK_NULL); // length
2542 u2 length = cfs->get_u2_fast();
2543 if (length == 0) {
2544 _methods = Universe::the_empty_method_array();
2545 } else {
2546 _methods = MetadataFactory::new_array<Method*>(_loader_data, length, NULL, CHECK_NULL);
2547
2548 HandleMark hm(THREAD);
2549 for (int index = 0; index < length; index++) {
2550 methodHandle method = parse_method(is_interface,
2551 promoted_flags,
2552 CHECK_NULL);
2553
2554 if (method->is_final()) {
2555 *has_final_method = true;
2556 }
2557 // declares_default_methods: declares concrete instance methods, any access flags
2558 // used for interface initialization, and default method inheritance analysis
2559 if (is_interface && !(*declares_default_methods)
2560 && !method->is_abstract() && !method->is_static()) {
2561 *declares_default_methods = true;
2562 }
2563 _methods->at_put(index, method());
2564 }
2565
2566 if (_need_verify && length > 1) {
2567 // Check duplicated methods
2568 ResourceMark rm(THREAD);
2569 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2570 THREAD, NameSigHash*, HASH_ROW_SIZE);
2571 initialize_hashtable(names_and_sigs);
2572 bool dup = false;
2573 {
2574 debug_only(No_Safepoint_Verifier nsv;)
2575 for (int i = 0; i < length; i++) {
2576 Method* m = _methods->at(i);
2577 // If no duplicates, add name/signature in hashtable names_and_sigs.
2578 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2579 dup = true;
2580 break;
2581 }
2582 }
2583 }
2584 if (dup) {
2585 classfile_parse_error("Duplicate method name&signature in class file %s",
2586 CHECK_NULL);
2587 }
2588 }
2589 }
2590 return _methods;
2591 }
2592
2593
2594 intArray* ClassFileParser::sort_methods(Array<Method*>* methods) {
2595 int length = methods->length();
2596 // If JVMTI original method ordering or sharing is enabled we have to
2597 // remember the original class file ordering.
2598 // We temporarily use the vtable_index field in the Method* to store the
2599 // class file index, so we can read in after calling qsort.
2600 // Put the method ordering in the shared archive.
2601 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2602 for (int index = 0; index < length; index++) {
2603 Method* m = methods->at(index);
2604 assert(!m->valid_vtable_index(), "vtable index should not be set");
2605 m->set_vtable_index(index);
2606 }
2607 }
2608 // Sort method array by ascending method name (for faster lookups & vtable construction)
2609 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2610 Method::sort_methods(methods);
2611
2612 intArray* method_ordering = NULL;
2613 // If JVMTI original method ordering or sharing is enabled construct int
2614 // array remembering the original ordering
2615 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2616 method_ordering = new intArray(length);
2617 for (int index = 0; index < length; index++) {
2618 Method* m = methods->at(index);
2619 int old_index = m->vtable_index();
2620 assert(old_index >= 0 && old_index < length, "invalid method index");
2621 method_ordering->at_put(index, old_index);
2622 m->set_vtable_index(Method::invalid_vtable_index);
2623 }
2624 }
2625 return method_ordering;
2626 }
2627
2628 // Parse generic_signature attribute for methods and fields
2629 u2 ClassFileParser::parse_generic_signature_attribute(TRAPS) {
2630 ClassFileStream* cfs = stream();
2631 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2632 u2 generic_signature_index = cfs->get_u2_fast();
2633 check_property(
2634 valid_symbol_at(generic_signature_index),
2635 "Invalid Signature attribute at constant pool index %u in class file %s",
2636 generic_signature_index, CHECK_0);
2637 return generic_signature_index;
2638 }
2639
2640 void ClassFileParser::parse_classfile_sourcefile_attribute(TRAPS) {
2641 ClassFileStream* cfs = stream();
2642 cfs->guarantee_more(2, CHECK); // sourcefile_index
2643 u2 sourcefile_index = cfs->get_u2_fast();
2644 check_property(
2645 valid_symbol_at(sourcefile_index),
2646 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2647 sourcefile_index, CHECK);
2648 set_class_sourcefile_index(sourcefile_index);
2649 }
2650
2651
2652
2653 void ClassFileParser::parse_classfile_source_debug_extension_attribute(int length, TRAPS) {
2654 ClassFileStream* cfs = stream();
2655 u1* sde_buffer = cfs->get_u1_buffer();
2656 assert(sde_buffer != NULL, "null sde buffer");
2657
2658 // Don't bother storing it if there is no way to retrieve it
2659 if (JvmtiExport::can_get_source_debug_extension()) {
2660 assert((length+1) > length, "Overflow checking");
2661 u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2662 for (int i = 0; i < length; i++) {
2663 sde[i] = sde_buffer[i];
2664 }
2665 sde[length] = '\0';
2666 set_class_sde_buffer((char*)sde, length);
2667 }
2668 // Got utf8 string, set stream position forward
2669 cfs->skip_u1(length, CHECK);
2670 }
2671
2672
2673 // Inner classes can be static, private or protected (classic VM does this)
2674 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2675
2676 // Return number of classes in the inner classes attribute table
2677 u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start,
2678 bool parsed_enclosingmethod_attribute,
2679 u2 enclosing_method_class_index,
2680 u2 enclosing_method_method_index,
2681 TRAPS) {
2682 ClassFileStream* cfs = stream();
2683 u1* current_mark = cfs->current();
2684 u2 length = 0;
2685 if (inner_classes_attribute_start != NULL) {
2686 cfs->set_current(inner_classes_attribute_start);
2687 cfs->guarantee_more(2, CHECK_0); // length
2688 length = cfs->get_u2_fast();
2689 }
2690
2691 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2692 // method data:
2693 // [inner_class_info_index,
2694 // outer_class_info_index,
2695 // inner_name_index,
2696 // inner_class_access_flags,
2697 // ...
2698 // enclosing_method_class_index,
2699 // enclosing_method_method_index]
2700 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2701 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
2702 _inner_classes = inner_classes;
2703
2704 int index = 0;
2705 int cp_size = _cp->length();
2706 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2707 for (int n = 0; n < length; n++) {
2708 // Inner class index
2709 u2 inner_class_info_index = cfs->get_u2_fast();
2710 check_property(
2711 valid_klass_reference_at(inner_class_info_index),
2712 "inner_class_info_index %u has bad constant type in class file %s",
2713 inner_class_info_index, CHECK_0);
2714 // Outer class index
2715 u2 outer_class_info_index = cfs->get_u2_fast();
2716 check_property(
2717 outer_class_info_index == 0 ||
2718 valid_klass_reference_at(outer_class_info_index),
2719 "outer_class_info_index %u has bad constant type in class file %s",
2720 outer_class_info_index, CHECK_0);
2721 // Inner class name
2722 u2 inner_name_index = cfs->get_u2_fast();
2723 check_property(
2724 inner_name_index == 0 || valid_symbol_at(inner_name_index),
2725 "inner_name_index %u has bad constant type in class file %s",
2726 inner_name_index, CHECK_0);
2727 if (_need_verify) {
2728 guarantee_property(inner_class_info_index != outer_class_info_index,
2729 "Class is both outer and inner class in class file %s", CHECK_0);
2730 }
2731 // Access flags
2732 AccessFlags inner_access_flags;
2733 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2734 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2735 // Set abstract bit for old class files for backward compatibility
2736 flags |= JVM_ACC_ABSTRACT;
2737 }
2738 verify_legal_class_modifiers(flags, CHECK_0);
2739 inner_access_flags.set_flags(flags);
2740
2741 inner_classes->at_put(index++, inner_class_info_index);
2742 inner_classes->at_put(index++, outer_class_info_index);
2743 inner_classes->at_put(index++, inner_name_index);
2744 inner_classes->at_put(index++, inner_access_flags.as_short());
2745 }
2746
2747 // 4347400: make sure there's no duplicate entry in the classes array
2748 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2749 for(int i = 0; i < length * 4; i += 4) {
2750 for(int j = i + 4; j < length * 4; j += 4) {
2751 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
2752 inner_classes->at(i+1) != inner_classes->at(j+1) ||
2753 inner_classes->at(i+2) != inner_classes->at(j+2) ||
2754 inner_classes->at(i+3) != inner_classes->at(j+3)),
2755 "Duplicate entry in InnerClasses in class file %s",
2756 CHECK_0);
2757 }
2758 }
2759 }
2760
2761 // Set EnclosingMethod class and method indexes.
2762 if (parsed_enclosingmethod_attribute) {
2763 inner_classes->at_put(index++, enclosing_method_class_index);
2764 inner_classes->at_put(index++, enclosing_method_method_index);
2765 }
2766 assert(index == size, "wrong size");
2767
2768 // Restore buffer's current position.
2769 cfs->set_current(current_mark);
2770
2771 return length;
2772 }
2773
2774 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
2775 set_class_synthetic_flag(true);
2776 }
2777
2778 void ClassFileParser::parse_classfile_signature_attribute(TRAPS) {
2779 ClassFileStream* cfs = stream();
2780 u2 signature_index = cfs->get_u2(CHECK);
2781 check_property(
2782 valid_symbol_at(signature_index),
2783 "Invalid constant pool index %u in Signature attribute in class file %s",
2784 signature_index, CHECK);
2785 set_class_generic_signature_index(signature_index);
2786 }
2787
2788 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(u4 attribute_byte_length, TRAPS) {
2789 ClassFileStream* cfs = stream();
2790 u1* current_start = cfs->current();
2791
2792 guarantee_property(attribute_byte_length >= sizeof(u2),
2793 "Invalid BootstrapMethods attribute length %u in class file %s",
2794 attribute_byte_length,
2795 CHECK);
2796
2797 cfs->guarantee_more(attribute_byte_length, CHECK);
2798
2799 int attribute_array_length = cfs->get_u2_fast();
2800
2801 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2802 "Short length on BootstrapMethods in class file %s",
2803 CHECK);
2804
2805
2806 // The attribute contains a counted array of counted tuples of shorts,
2807 // represending bootstrap specifiers:
2808 // length*{bootstrap_method_index, argument_count*{argument_index}}
2809 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2810 // operand_count = number of shorts in attr, except for leading length
2811
2812 // The attribute is copied into a short[] array.
2813 // The array begins with a series of short[2] pairs, one for each tuple.
2814 int index_size = (attribute_array_length * 2);
2815
2816 Array<u2>* operands = MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
2817
2818 // Eagerly assign operands so they will be deallocated with the constant
2819 // pool if there is an error.
2820 _cp->set_operands(operands);
2821
2822 int operand_fill_index = index_size;
2823 int cp_size = _cp->length();
2824
2825 for (int n = 0; n < attribute_array_length; n++) {
2826 // Store a 32-bit offset into the header of the operand array.
2827 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
2828
2829 // Read a bootstrap specifier.
2830 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2831 u2 bootstrap_method_index = cfs->get_u2_fast();
2832 u2 argument_count = cfs->get_u2_fast();
2833 check_property(
2834 valid_cp_range(bootstrap_method_index, cp_size) &&
2835 _cp->tag_at(bootstrap_method_index).is_method_handle(),
2836 "bootstrap_method_index %u has bad constant type in class file %s",
2837 bootstrap_method_index,
2838 CHECK);
2839
2840 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
2841 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
2842 CHECK);
2843
2844 operands->at_put(operand_fill_index++, bootstrap_method_index);
2845 operands->at_put(operand_fill_index++, argument_count);
2846
2847 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2848 for (int j = 0; j < argument_count; j++) {
2849 u2 argument_index = cfs->get_u2_fast();
2850 check_property(
2851 valid_cp_range(argument_index, cp_size) &&
2852 _cp->tag_at(argument_index).is_loadable_constant(),
2853 "argument_index %u has bad constant type in class file %s",
2854 argument_index,
2855 CHECK);
2856 operands->at_put(operand_fill_index++, argument_index);
2857 }
2858 }
2859
2860 u1* current_end = cfs->current();
2861 guarantee_property(current_end == current_start + attribute_byte_length,
2862 "Bad length on BootstrapMethods in class file %s",
2863 CHECK);
2864 }
2865
2866 void ClassFileParser::parse_classfile_attributes(ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2867 TRAPS) {
2868 ClassFileStream* cfs = stream();
2869 // Set inner classes attribute to default sentinel
2870 _inner_classes = Universe::the_empty_short_array();
2871 cfs->guarantee_more(2, CHECK); // attributes_count
2872 u2 attributes_count = cfs->get_u2_fast();
2873 bool parsed_sourcefile_attribute = false;
2874 bool parsed_innerclasses_attribute = false;
2875 bool parsed_enclosingmethod_attribute = false;
2876 bool parsed_bootstrap_methods_attribute = false;
2877 u1* runtime_visible_annotations = NULL;
2878 int runtime_visible_annotations_length = 0;
2879 u1* runtime_invisible_annotations = NULL;
2880 int runtime_invisible_annotations_length = 0;
2881 u1* runtime_visible_type_annotations = NULL;
2882 int runtime_visible_type_annotations_length = 0;
2883 u1* runtime_invisible_type_annotations = NULL;
2884 int runtime_invisible_type_annotations_length = 0;
2885 bool runtime_invisible_type_annotations_exists = false;
2886 bool runtime_invisible_annotations_exists = false;
2887 bool parsed_source_debug_ext_annotations_exist = false;
2888 u1* inner_classes_attribute_start = NULL;
2889 u4 inner_classes_attribute_length = 0;
2890 u2 enclosing_method_class_index = 0;
2891 u2 enclosing_method_method_index = 0;
2892 // Iterate over attributes
2893 while (attributes_count--) {
2894 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2895 u2 attribute_name_index = cfs->get_u2_fast();
2896 u4 attribute_length = cfs->get_u4_fast();
2897 check_property(
2898 valid_symbol_at(attribute_name_index),
2899 "Attribute name has bad constant pool index %u in class file %s",
2900 attribute_name_index, CHECK);
2901 Symbol* tag = _cp->symbol_at(attribute_name_index);
2902 if (tag == vmSymbols::tag_source_file()) {
2903 // Check for SourceFile tag
2904 if (_need_verify) {
2905 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2906 }
2907 if (parsed_sourcefile_attribute) {
2908 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2909 } else {
2910 parsed_sourcefile_attribute = true;
2911 }
2912 parse_classfile_sourcefile_attribute(CHECK);
2913 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2914 // Check for SourceDebugExtension tag
2915 if (parsed_source_debug_ext_annotations_exist) {
2916 classfile_parse_error(
2917 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
2918 }
2919 parsed_source_debug_ext_annotations_exist = true;
2920 parse_classfile_source_debug_extension_attribute((int)attribute_length, CHECK);
2921 } else if (tag == vmSymbols::tag_inner_classes()) {
2922 // Check for InnerClasses tag
2923 if (parsed_innerclasses_attribute) {
2924 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2925 } else {
2926 parsed_innerclasses_attribute = true;
2927 }
2928 inner_classes_attribute_start = cfs->get_u1_buffer();
2929 inner_classes_attribute_length = attribute_length;
2930 cfs->skip_u1(inner_classes_attribute_length, CHECK);
2931 } else if (tag == vmSymbols::tag_synthetic()) {
2932 // Check for Synthetic tag
2933 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2934 if (attribute_length != 0) {
2935 classfile_parse_error(
2936 "Invalid Synthetic classfile attribute length %u in class file %s",
2937 attribute_length, CHECK);
2938 }
2939 parse_classfile_synthetic_attribute(CHECK);
2940 } else if (tag == vmSymbols::tag_deprecated()) {
2941 // Check for Deprecatd tag - 4276120
2942 if (attribute_length != 0) {
2943 classfile_parse_error(
2944 "Invalid Deprecated classfile attribute length %u in class file %s",
2945 attribute_length, CHECK);
2946 }
2947 } else if (_major_version >= JAVA_1_5_VERSION) {
2948 if (tag == vmSymbols::tag_signature()) {
2949 if (attribute_length != 2) {
2950 classfile_parse_error(
2951 "Wrong Signature attribute length %u in class file %s",
2952 attribute_length, CHECK);
2953 }
2954 parse_classfile_signature_attribute(CHECK);
2955 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2956 if (runtime_visible_annotations != NULL) {
2957 classfile_parse_error(
2958 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
2959 }
2960 runtime_visible_annotations_length = attribute_length;
2961 runtime_visible_annotations = cfs->get_u1_buffer();
2962 assert(runtime_visible_annotations != NULL, "null visible annotations");
2963 parse_annotations(runtime_visible_annotations,
2964 runtime_visible_annotations_length,
2965 parsed_annotations);
2966 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2967 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
2968 if (runtime_invisible_annotations_exists) {
2969 classfile_parse_error(
2970 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
2971 }
2972 runtime_invisible_annotations_exists = true;
2973 if (PreserveAllAnnotations) {
2974 runtime_invisible_annotations_length = attribute_length;
2975 runtime_invisible_annotations = cfs->get_u1_buffer();
2976 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2977 }
2978 cfs->skip_u1(attribute_length, CHECK);
2979 } else if (tag == vmSymbols::tag_enclosing_method()) {
2980 if (parsed_enclosingmethod_attribute) {
2981 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2982 } else {
2983 parsed_enclosingmethod_attribute = true;
2984 }
2985 guarantee_property(attribute_length == 4,
2986 "Wrong EnclosingMethod attribute length %u in class file %s",
2987 attribute_length, CHECK);
2988 cfs->guarantee_more(4, CHECK); // class_index, method_index
2989 enclosing_method_class_index = cfs->get_u2_fast();
2990 enclosing_method_method_index = cfs->get_u2_fast();
2991 if (enclosing_method_class_index == 0) {
2992 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2993 }
2994 // Validate the constant pool indices and types
2995 check_property(valid_klass_reference_at(enclosing_method_class_index),
2996 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2997 if (enclosing_method_method_index != 0 &&
2998 (!_cp->is_within_bounds(enclosing_method_method_index) ||
2999 !_cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3000 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3001 }
3002 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3003 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3004 if (parsed_bootstrap_methods_attribute)
3005 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3006 parsed_bootstrap_methods_attribute = true;
3007 parse_classfile_bootstrap_methods_attribute(attribute_length, CHECK);
3008 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3009 if (runtime_visible_type_annotations != NULL) {
3010 classfile_parse_error(
3011 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3012 }
3013 runtime_visible_type_annotations_length = attribute_length;
3014 runtime_visible_type_annotations = cfs->get_u1_buffer();
3015 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3016 // No need for the VM to parse Type annotations
3017 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3018 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3019 if (runtime_invisible_type_annotations_exists) {
3020 classfile_parse_error(
3021 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3022 } else {
3023 runtime_invisible_type_annotations_exists = true;
3024 }
3025 if (PreserveAllAnnotations) {
3026 runtime_invisible_type_annotations_length = attribute_length;
3027 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3028 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3029 }
3030 cfs->skip_u1(attribute_length, CHECK);
3031 } else {
3032 // Unknown attribute
3033 cfs->skip_u1(attribute_length, CHECK);
3034 }
3035 } else {
3036 // Unknown attribute
3037 cfs->skip_u1(attribute_length, CHECK);
3038 }
3039 }
3040 _annotations = assemble_annotations(runtime_visible_annotations,
3041 runtime_visible_annotations_length,
3042 runtime_invisible_annotations,
3043 runtime_invisible_annotations_length,
3044 CHECK);
3045 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3046 runtime_visible_type_annotations_length,
3047 runtime_invisible_type_annotations,
3048 runtime_invisible_type_annotations_length,
3049 CHECK);
3050
3051 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3052 u2 num_of_classes = parse_classfile_inner_classes_attribute(
3053 inner_classes_attribute_start,
3054 parsed_innerclasses_attribute,
3055 enclosing_method_class_index,
3056 enclosing_method_method_index,
3057 CHECK);
3058 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3059 guarantee_property(
3060 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3061 "Wrong InnerClasses attribute length in class file %s", CHECK);
3062 }
3063 }
3064
3065 if (_max_bootstrap_specifier_index >= 0) {
3066 guarantee_property(parsed_bootstrap_methods_attribute,
3067 "Missing BootstrapMethods attribute in class file %s", CHECK);
3068 }
3069 }
3070
3071 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
3072 if (_synthetic_flag)
3073 k->set_is_synthetic();
3074 if (_sourcefile_index != 0) {
3075 k->set_source_file_name_index(_sourcefile_index);
3076 }
3077 if (_generic_signature_index != 0) {
3078 k->set_generic_signature_index(_generic_signature_index);
3079 }
3080 if (_sde_buffer != NULL) {
3081 k->set_source_debug_extension(_sde_buffer, _sde_length);
3082 }
3083 }
3084
3085 // Create the Annotations object that will
3086 // hold the annotations array for the Klass.
3087 void ClassFileParser::create_combined_annotations(TRAPS) {
3088 if (_annotations == NULL &&
3089 _type_annotations == NULL &&
3090 _fields_annotations == NULL &&
3091 _fields_type_annotations == NULL) {
3092 // Don't create the Annotations object unnecessarily.
3093 return;
3094 }
3095
3096 Annotations* annotations = Annotations::allocate(_loader_data, CHECK);
3097 annotations->set_class_annotations(_annotations);
3098 annotations->set_class_type_annotations(_type_annotations);
3099 annotations->set_fields_annotations(_fields_annotations);
3100 annotations->set_fields_type_annotations(_fields_type_annotations);
3101
3102 // This is the Annotations object that will be
3103 // assigned to InstanceKlass being constructed.
3104 _combined_annotations = annotations;
3105
3106 // The annotations arrays below has been transfered the
3107 // _combined_annotations so these fields can now be cleared.
3108 _annotations = NULL;
3109 _type_annotations = NULL;
3110 _fields_annotations = NULL;
3111 _fields_type_annotations = NULL;
3112 }
3113
3114 // Transfer ownership of metadata allocated to the InstanceKlass.
3115 void ClassFileParser::apply_parsed_class_metadata(
3116 instanceKlassHandle this_klass,
3117 int java_fields_count, TRAPS) {
3118 _cp->set_pool_holder(this_klass());
3119 this_klass->set_constants(_cp);
3120 this_klass->set_fields(_fields, java_fields_count);
3121 this_klass->set_methods(_methods);
3122 this_klass->set_inner_classes(_inner_classes);
3123 this_klass->set_local_interfaces(_local_interfaces);
3124 this_klass->set_transitive_interfaces(_transitive_interfaces);
3125 this_klass->set_annotations(_combined_annotations);
3126
3127 // Clear out these fields so they don't get deallocated by the destructor
3128 clear_class_metadata();
3129 }
3130
3131 AnnotationArray* ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
3132 int runtime_visible_annotations_length,
3133 u1* runtime_invisible_annotations,
3134 int runtime_invisible_annotations_length, TRAPS) {
3135 AnnotationArray* annotations = NULL;
3136 if (runtime_visible_annotations != NULL ||
3137 runtime_invisible_annotations != NULL) {
3138 annotations = MetadataFactory::new_array<u1>(_loader_data,
3139 runtime_visible_annotations_length +
3140 runtime_invisible_annotations_length,
3141 CHECK_(annotations));
3142 if (runtime_visible_annotations != NULL) {
3143 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3144 annotations->at_put(i, runtime_visible_annotations[i]);
3145 }
3146 }
3147 if (runtime_invisible_annotations != NULL) {
3148 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3149 int append = runtime_visible_annotations_length+i;
3150 annotations->at_put(append, runtime_invisible_annotations[i]);
3151 }
3152 }
3153 }
3154 return annotations;
3155 }
3156
3157 instanceKlassHandle ClassFileParser::parse_super_class(int super_class_index,
3158 TRAPS) {
3159 instanceKlassHandle super_klass;
3160 if (super_class_index == 0) {
3161 check_property(_class_name == vmSymbols::java_lang_Object(),
3162 "Invalid superclass index %u in class file %s",
3163 super_class_index,
3164 CHECK_NULL);
3165 } else {
3166 check_property(valid_klass_reference_at(super_class_index),
3167 "Invalid superclass index %u in class file %s",
3168 super_class_index,
3169 CHECK_NULL);
3170 // The class name should be legal because it is checked when parsing constant pool.
3171 // However, make sure it is not an array type.
3172 bool is_array = false;
3173 if (_cp->tag_at(super_class_index).is_klass()) {
3174 super_klass = instanceKlassHandle(THREAD, _cp->resolved_klass_at(super_class_index));
3175 if (_need_verify)
3176 is_array = super_klass->oop_is_array();
3177 } else if (_need_verify) {
3178 is_array = (_cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3179 }
3180 if (_need_verify) {
3181 guarantee_property(!is_array,
3182 "Bad superclass name in class file %s", CHECK_NULL);
3183 }
3184 }
3185 return super_klass;
3186 }
3187
3188
3189 // Values needed for oopmap and InstanceKlass creation
3190 class FieldLayoutInfo : public StackObj {
3191 public:
3192 int* nonstatic_oop_offsets;
3193 unsigned int* nonstatic_oop_counts;
3194 unsigned int nonstatic_oop_map_count;
3195 unsigned int total_oop_map_count;
3196 int instance_size;
3197 int nonstatic_field_size;
3198 int static_field_size;
3199 bool has_nonstatic_fields;
3200 };
3201
3202 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3203 void ClassFileParser::layout_fields(Handle class_loader,
3204 FieldAllocationCount* fac,
3205 ClassAnnotationCollector* parsed_annotations,
3206 FieldLayoutInfo* info,
3207 TRAPS) {
3208
3209 // Field size and offset computation
3210 int nonstatic_field_size = _super_klass() == NULL ? 0 : _super_klass()->nonstatic_field_size();
3211 int next_static_oop_offset;
3212 int next_static_double_offset;
3213 int next_static_word_offset;
3214 int next_static_short_offset;
3215 int next_static_byte_offset;
3216 int next_nonstatic_oop_offset;
3217 int next_nonstatic_double_offset;
3218 int next_nonstatic_word_offset;
3219 int next_nonstatic_short_offset;
3220 int next_nonstatic_byte_offset;
3221 int first_nonstatic_oop_offset;
3222 int next_nonstatic_field_offset;
3223 int next_nonstatic_padded_offset;
3224
3225 // Count the contended fields by type.
3226 //
3227 // We ignore static fields, because @Contended is not supported for them.
3228 // The layout code below will also ignore the static fields.
3229 int nonstatic_contended_count = 0;
3230 FieldAllocationCount fac_contended;
3231 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3232 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3233 if (fs.is_contended()) {
3234 fac_contended.count[atype]++;
3235 if (!fs.access_flags().is_static()) {
3236 nonstatic_contended_count++;
3237 }
3238 }
3239 }
3240
3241
3242 // Calculate the starting byte offsets
3243 next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3244 next_static_double_offset = next_static_oop_offset +
3245 ((fac->count[STATIC_OOP]) * heapOopSize);
3246 if ( fac->count[STATIC_DOUBLE] &&
3247 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3248 Universe::field_type_should_be_aligned(T_LONG)) ) {
3249 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3250 }
3251
3252 next_static_word_offset = next_static_double_offset +
3253 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3254 next_static_short_offset = next_static_word_offset +
3255 ((fac->count[STATIC_WORD]) * BytesPerInt);
3256 next_static_byte_offset = next_static_short_offset +
3257 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3258
3259 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3260 nonstatic_field_size * heapOopSize;
3261
3262 next_nonstatic_field_offset = nonstatic_fields_start;
3263
3264 bool is_contended_class = parsed_annotations->is_contended();
3265
3266 // Class is contended, pad before all the fields
3267 if (is_contended_class) {
3268 next_nonstatic_field_offset += ContendedPaddingWidth;
3269 }
3270
3271 // Compute the non-contended fields count.
3272 // The packing code below relies on these counts to determine if some field
3273 // can be squeezed into the alignment gap. Contended fields are obviously
3274 // exempt from that.
3275 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3276 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3277 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3278 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3279 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3280
3281 // Total non-static fields count, including every contended field
3282 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3283 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3284 fac->count[NONSTATIC_OOP];
3285
3286 bool super_has_nonstatic_fields =
3287 (_super_klass() != NULL && _super_klass->has_nonstatic_fields());
3288 bool has_nonstatic_fields = super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3289
3290
3291 // Prepare list of oops for oop map generation.
3292 //
3293 // "offset" and "count" lists are describing the set of contiguous oop
3294 // regions. offset[i] is the start of the i-th region, which then has
3295 // count[i] oops following. Before we know how many regions are required,
3296 // we pessimistically allocate the maps to fit all the oops into the
3297 // distinct regions.
3298 //
3299 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3300 // to figure out if we still need to do this.
3301 int* nonstatic_oop_offsets;
3302 unsigned int* nonstatic_oop_counts;
3303 unsigned int nonstatic_oop_map_count = 0;
3304 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3305
3306 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3307 THREAD, int, max_nonstatic_oop_maps);
3308 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3309 THREAD, unsigned int, max_nonstatic_oop_maps);
3310
3311 first_nonstatic_oop_offset = 0; // will be set for first oop field
3312
3313 bool compact_fields = CompactFields;
3314 int allocation_style = FieldsAllocationStyle;
3315 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3316 assert(false, "0 <= FieldsAllocationStyle <= 2");
3317 allocation_style = 1; // Optimistic
3318 }
3319
3320 // The next classes have predefined hard-coded fields offsets
3321 // (see in JavaClasses::compute_hard_coded_offsets()).
3322 // Use default fields allocation order for them.
3323 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3324 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3325 _class_name == vmSymbols::java_lang_Class() ||
3326 _class_name == vmSymbols::java_lang_ClassLoader() ||
3327 _class_name == vmSymbols::java_lang_ref_Reference() ||
3328 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3329 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3330 _class_name == vmSymbols::java_lang_String() ||
3331 _class_name == vmSymbols::java_lang_Throwable() ||
3332 _class_name == vmSymbols::java_lang_Boolean() ||
3333 _class_name == vmSymbols::java_lang_Character() ||
3334 _class_name == vmSymbols::java_lang_Float() ||
3335 _class_name == vmSymbols::java_lang_Double() ||
3336 _class_name == vmSymbols::java_lang_Byte() ||
3337 _class_name == vmSymbols::java_lang_Short() ||
3338 _class_name == vmSymbols::java_lang_Integer() ||
3339 _class_name == vmSymbols::java_lang_Long())) {
3340 allocation_style = 0; // Allocate oops first
3341 compact_fields = false; // Don't compact fields
3342 }
3343
3344 // Rearrange fields for a given allocation style
3345 if( allocation_style == 0 ) {
3346 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3347 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3348 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3349 (nonstatic_oop_count * heapOopSize);
3350 } else if( allocation_style == 1 ) {
3351 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3352 next_nonstatic_double_offset = next_nonstatic_field_offset;
3353 } else if( allocation_style == 2 ) {
3354 // Fields allocation: oops fields in super and sub classes are together.
3355 if( nonstatic_field_size > 0 && _super_klass() != NULL &&
3356 _super_klass->nonstatic_oop_map_size() > 0 ) {
3357 unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3358 OopMapBlock* first_map = _super_klass->start_of_nonstatic_oop_maps();
3359 OopMapBlock* last_map = first_map + map_count - 1;
3360 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3361 if (next_offset == next_nonstatic_field_offset) {
3362 allocation_style = 0; // allocate oops first
3363 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3364 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3365 (nonstatic_oop_count * heapOopSize);
3366 }
3367 }
3368 if( allocation_style == 2 ) {
3369 allocation_style = 1; // allocate oops last
3370 next_nonstatic_double_offset = next_nonstatic_field_offset;
3371 }
3372 } else {
3373 ShouldNotReachHere();
3374 }
3375
3376 int nonstatic_oop_space_count = 0;
3377 int nonstatic_word_space_count = 0;
3378 int nonstatic_short_space_count = 0;
3379 int nonstatic_byte_space_count = 0;
3380 int nonstatic_oop_space_offset;
3381 int nonstatic_word_space_offset;
3382 int nonstatic_short_space_offset;
3383 int nonstatic_byte_space_offset;
3384
3385 // Try to squeeze some of the fields into the gaps due to
3386 // long/double alignment.
3387 if( nonstatic_double_count > 0 ) {
3388 int offset = next_nonstatic_double_offset;
3389 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3390 if( compact_fields && offset != next_nonstatic_double_offset ) {
3391 // Allocate available fields into the gap before double field.
3392 int length = next_nonstatic_double_offset - offset;
3393 assert(length == BytesPerInt, "");
3394 nonstatic_word_space_offset = offset;
3395 if( nonstatic_word_count > 0 ) {
3396 nonstatic_word_count -= 1;
3397 nonstatic_word_space_count = 1; // Only one will fit
3398 length -= BytesPerInt;
3399 offset += BytesPerInt;
3400 }
3401 nonstatic_short_space_offset = offset;
3402 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3403 nonstatic_short_count -= 1;
3404 nonstatic_short_space_count += 1;
3405 length -= BytesPerShort;
3406 offset += BytesPerShort;
3407 }
3408 nonstatic_byte_space_offset = offset;
3409 while( length > 0 && nonstatic_byte_count > 0 ) {
3410 nonstatic_byte_count -= 1;
3411 nonstatic_byte_space_count += 1;
3412 length -= 1;
3413 }
3414 // Allocate oop field in the gap if there are no other fields for that.
3415 nonstatic_oop_space_offset = offset;
3416 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3417 allocation_style != 0 ) { // when oop fields not first
3418 nonstatic_oop_count -= 1;
3419 nonstatic_oop_space_count = 1; // Only one will fit
3420 length -= heapOopSize;
3421 offset += heapOopSize;
3422 }
3423 }
3424 }
3425
3426 next_nonstatic_word_offset = next_nonstatic_double_offset +
3427 (nonstatic_double_count * BytesPerLong);
3428 next_nonstatic_short_offset = next_nonstatic_word_offset +
3429 (nonstatic_word_count * BytesPerInt);
3430 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3431 (nonstatic_short_count * BytesPerShort);
3432 next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3433 nonstatic_byte_count;
3434
3435 // let oops jump before padding with this allocation style
3436 if( allocation_style == 1 ) {
3437 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3438 if( nonstatic_oop_count > 0 ) {
3439 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3440 }
3441 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3442 }
3443
3444 // Iterate over fields again and compute correct offsets.
3445 // The field allocation type was temporarily stored in the offset slot.
3446 // oop fields are located before non-oop fields (static and non-static).
3447 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3448
3449 // skip already laid out fields
3450 if (fs.is_offset_set()) continue;
3451
3452 // contended instance fields are handled below
3453 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3454
3455 int real_offset;
3456 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3457
3458 // pack the rest of the fields
3459 switch (atype) {
3460 case STATIC_OOP:
3461 real_offset = next_static_oop_offset;
3462 next_static_oop_offset += heapOopSize;
3463 break;
3464 case STATIC_BYTE:
3465 real_offset = next_static_byte_offset;
3466 next_static_byte_offset += 1;
3467 break;
3468 case STATIC_SHORT:
3469 real_offset = next_static_short_offset;
3470 next_static_short_offset += BytesPerShort;
3471 break;
3472 case STATIC_WORD:
3473 real_offset = next_static_word_offset;
3474 next_static_word_offset += BytesPerInt;
3475 break;
3476 case STATIC_DOUBLE:
3477 real_offset = next_static_double_offset;
3478 next_static_double_offset += BytesPerLong;
3479 break;
3480 case NONSTATIC_OOP:
3481 if( nonstatic_oop_space_count > 0 ) {
3482 real_offset = nonstatic_oop_space_offset;
3483 nonstatic_oop_space_offset += heapOopSize;
3484 nonstatic_oop_space_count -= 1;
3485 } else {
3486 real_offset = next_nonstatic_oop_offset;
3487 next_nonstatic_oop_offset += heapOopSize;
3488 }
3489
3490 // Record this oop in the oop maps
3491 if( nonstatic_oop_map_count > 0 &&
3492 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3493 real_offset -
3494 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3495 heapOopSize ) {
3496 // This oop is adjacent to the previous one, add to current oop map
3497 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3498 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3499 } else {
3500 // This oop is not adjacent to the previous one, create new oop map
3501 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3502 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3503 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3504 nonstatic_oop_map_count += 1;
3505 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3506 first_nonstatic_oop_offset = real_offset;
3507 }
3508 }
3509 break;
3510 case NONSTATIC_BYTE:
3511 if( nonstatic_byte_space_count > 0 ) {
3512 real_offset = nonstatic_byte_space_offset;
3513 nonstatic_byte_space_offset += 1;
3514 nonstatic_byte_space_count -= 1;
3515 } else {
3516 real_offset = next_nonstatic_byte_offset;
3517 next_nonstatic_byte_offset += 1;
3518 }
3519 break;
3520 case NONSTATIC_SHORT:
3521 if( nonstatic_short_space_count > 0 ) {
3522 real_offset = nonstatic_short_space_offset;
3523 nonstatic_short_space_offset += BytesPerShort;
3524 nonstatic_short_space_count -= 1;
3525 } else {
3526 real_offset = next_nonstatic_short_offset;
3527 next_nonstatic_short_offset += BytesPerShort;
3528 }
3529 break;
3530 case NONSTATIC_WORD:
3531 if( nonstatic_word_space_count > 0 ) {
3532 real_offset = nonstatic_word_space_offset;
3533 nonstatic_word_space_offset += BytesPerInt;
3534 nonstatic_word_space_count -= 1;
3535 } else {
3536 real_offset = next_nonstatic_word_offset;
3537 next_nonstatic_word_offset += BytesPerInt;
3538 }
3539 break;
3540 case NONSTATIC_DOUBLE:
3541 real_offset = next_nonstatic_double_offset;
3542 next_nonstatic_double_offset += BytesPerLong;
3543 break;
3544 default:
3545 ShouldNotReachHere();
3546 }
3547 fs.set_offset(real_offset);
3548 }
3549
3550
3551 // Handle the contended cases.
3552 //
3553 // Each contended field should not intersect the cache line with another contended field.
3554 // In the absence of alignment information, we end up with pessimistically separating
3555 // the fields with full-width padding.
3556 //
3557 // Additionally, this should not break alignment for the fields, so we round the alignment up
3558 // for each field.
3559 if (nonstatic_contended_count > 0) {
3560
3561 // if there is at least one contended field, we need to have pre-padding for them
3562 next_nonstatic_padded_offset += ContendedPaddingWidth;
3563
3564 // collect all contended groups
3565 BitMap bm(_cp->size());
3566 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3567 // skip already laid out fields
3568 if (fs.is_offset_set()) continue;
3569
3570 if (fs.is_contended()) {
3571 bm.set_bit(fs.contended_group());
3572 }
3573 }
3574
3575 int current_group = -1;
3576 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3577
3578 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3579
3580 // skip already laid out fields
3581 if (fs.is_offset_set()) continue;
3582
3583 // skip non-contended fields and fields from different group
3584 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3585
3586 // handle statics below
3587 if (fs.access_flags().is_static()) continue;
3588
3589 int real_offset;
3590 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3591
3592 switch (atype) {
3593 case NONSTATIC_BYTE:
3594 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
3595 real_offset = next_nonstatic_padded_offset;
3596 next_nonstatic_padded_offset += 1;
3597 break;
3598
3599 case NONSTATIC_SHORT:
3600 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
3601 real_offset = next_nonstatic_padded_offset;
3602 next_nonstatic_padded_offset += BytesPerShort;
3603 break;
3604
3605 case NONSTATIC_WORD:
3606 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
3607 real_offset = next_nonstatic_padded_offset;
3608 next_nonstatic_padded_offset += BytesPerInt;
3609 break;
3610
3611 case NONSTATIC_DOUBLE:
3612 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
3613 real_offset = next_nonstatic_padded_offset;
3614 next_nonstatic_padded_offset += BytesPerLong;
3615 break;
3616
3617 case NONSTATIC_OOP:
3618 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
3619 real_offset = next_nonstatic_padded_offset;
3620 next_nonstatic_padded_offset += heapOopSize;
3621
3622 // Record this oop in the oop maps
3623 if( nonstatic_oop_map_count > 0 &&
3624 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3625 real_offset -
3626 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3627 heapOopSize ) {
3628 // This oop is adjacent to the previous one, add to current oop map
3629 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3630 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3631 } else {
3632 // This oop is not adjacent to the previous one, create new oop map
3633 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3634 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3635 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3636 nonstatic_oop_map_count += 1;
3637 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3638 first_nonstatic_oop_offset = real_offset;
3639 }
3640 }
3641 break;
3642
3643 default:
3644 ShouldNotReachHere();
3645 }
3646
3647 if (fs.contended_group() == 0) {
3648 // Contended group defines the equivalence class over the fields:
3649 // the fields within the same contended group are not inter-padded.
3650 // The only exception is default group, which does not incur the
3651 // equivalence, and so requires intra-padding.
3652 next_nonstatic_padded_offset += ContendedPaddingWidth;
3653 }
3654
3655 fs.set_offset(real_offset);
3656 } // for
3657
3658 // Start laying out the next group.
3659 // Note that this will effectively pad the last group in the back;
3660 // this is expected to alleviate memory contention effects for
3661 // subclass fields and/or adjacent object.
3662 // If this was the default group, the padding is already in place.
3663 if (current_group != 0) {
3664 next_nonstatic_padded_offset += ContendedPaddingWidth;
3665 }
3666 }
3667
3668 // handle static fields
3669 }
3670
3671 // Entire class is contended, pad in the back.
3672 // This helps to alleviate memory contention effects for subclass fields
3673 // and/or adjacent object.
3674 if (is_contended_class) {
3675 next_nonstatic_padded_offset += ContendedPaddingWidth;
3676 }
3677
3678 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
3679
3680 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
3681 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
3682 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
3683
3684 int static_field_size = (static_fields_end -
3685 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
3686 nonstatic_field_size = nonstatic_field_size +
3687 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
3688
3689 int instance_size = align_object_size(instance_end / wordSize);
3690
3691 assert(instance_size == align_object_size(align_size_up(
3692 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
3693 wordSize) / wordSize), "consistent layout helper value");
3694
3695 // Invariant: nonstatic_field end/start should only change if there are
3696 // nonstatic fields in the class, or if the class is contended. We compare
3697 // against the non-aligned value, so that end alignment will not fail the
3698 // assert without actually having the fields.
3699 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
3700 is_contended_class ||
3701 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
3702
3703 // Number of non-static oop map blocks allocated at end of klass.
3704 const unsigned int total_oop_map_count =
3705 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
3706 first_nonstatic_oop_offset);
3707
3708 #ifndef PRODUCT
3709 if (PrintFieldLayout) {
3710 print_field_layout(_class_name,
3711 _fields,
3712 _cp,
3713 instance_size,
3714 nonstatic_fields_start,
3715 nonstatic_fields_end,
3716 static_fields_end);
3717 }
3718
3719 #endif
3720 // Pass back information needed for InstanceKlass creation
3721 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
3722 info->nonstatic_oop_counts = nonstatic_oop_counts;
3723 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
3724 info->total_oop_map_count = total_oop_map_count;
3725 info->instance_size = instance_size;
3726 info->static_field_size = static_field_size;
3727 info->nonstatic_field_size = nonstatic_field_size;
3728 info->has_nonstatic_fields = has_nonstatic_fields;
3729 }
3730
3731
3732 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
3733 ClassLoaderData* loader_data,
3734 Handle protection_domain,
3735 KlassHandle host_klass,
3736 GrowableArray<Handle>* cp_patches,
3737 TempNewSymbol& parsed_name,
3738 bool verify,
3739 TRAPS) {
3740
3741 // When a retransformable agent is attached, JVMTI caches the
3742 // class bytes that existed before the first retransformation.
3743 // If RedefineClasses() was used before the retransformable
3744 // agent attached, then the cached class bytes may not be the
3745 // original class bytes.
3746 JvmtiCachedClassFileData *cached_class_file = NULL;
3747 Handle class_loader(THREAD, loader_data->class_loader());
3748 bool has_default_methods = false;
3749 bool declares_default_methods = false;
3750 ResourceMark rm(THREAD);
3751
3752 ClassFileStream* cfs = stream();
3753 // Timing
3754 assert(THREAD->is_Java_thread(), "must be a JavaThread");
3755 JavaThread* jt = (JavaThread*) THREAD;
3756
3757 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
3758 ClassLoader::perf_class_parse_selftime(),
3759 NULL,
3760 jt->get_thread_stat()->perf_recursion_counts_addr(),
3761 jt->get_thread_stat()->perf_timers_addr(),
3762 PerfClassTraceTime::PARSE_CLASS);
3763
3764 init_parsed_class_attributes(loader_data);
3765
3766 if (JvmtiExport::should_post_class_file_load_hook()) {
3767 // Get the cached class file bytes (if any) from the class that
3768 // is being redefined or retransformed. We use jvmti_thread_state()
3769 // instead of JvmtiThreadState::state_for(jt) so we don't allocate
3770 // a JvmtiThreadState any earlier than necessary. This will help
3771 // avoid the bug described by 7126851.
3772 JvmtiThreadState *state = jt->jvmti_thread_state();
3773 if (state != NULL) {
3774 KlassHandle *h_class_being_redefined =
3775 state->get_class_being_redefined();
3776 if (h_class_being_redefined != NULL) {
3777 instanceKlassHandle ikh_class_being_redefined =
3778 instanceKlassHandle(THREAD, (*h_class_being_redefined)());
3779 cached_class_file = ikh_class_being_redefined->get_cached_class_file();
3780 }
3781 }
3782
3783 unsigned char* ptr = cfs->buffer();
3784 unsigned char* end_ptr = cfs->buffer() + cfs->length();
3785
3786 JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain,
3787 &ptr, &end_ptr, &cached_class_file);
3788
3789 if (ptr != cfs->buffer()) {
3790 // JVMTI agent has modified class file data.
3791 // Set new class file stream using JVMTI agent modified
3792 // class file data.
3793 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
3794 set_stream(cfs);
3795 }
3796 }
3797
3798 _host_klass = host_klass;
3799 _cp_patches = cp_patches;
3800
3801 instanceKlassHandle nullHandle;
3802
3803 // Figure out whether we can skip format checking (matching classic VM behavior)
3804 if (DumpSharedSpaces) {
3805 // verify == true means it's a 'remote' class (i.e., non-boot class)
3806 // Verification decision is based on BytecodeVerificationRemote flag
3807 // for those classes.
3808 _need_verify = (verify) ? BytecodeVerificationRemote :
3809 BytecodeVerificationLocal;
3810 } else {
3811 _need_verify = Verifier::should_verify_for(class_loader(), verify);
3812 }
3813
3814 // Set the verify flag in stream
3815 cfs->set_verify(_need_verify);
3816
3817 // Save the class file name for easier error message printing.
3818 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
3819
3820 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
3821 // Magic value
3822 u4 magic = cfs->get_u4_fast();
3823 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
3824 "Incompatible magic value %u in class file %s",
3825 magic, CHECK_(nullHandle));
3826
3827 // Version numbers
3828 u2 minor_version = cfs->get_u2_fast();
3829 u2 major_version = cfs->get_u2_fast();
3830
3831 if (DumpSharedSpaces && major_version < JAVA_1_5_VERSION) {
3832 ResourceMark rm;
3833 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
3834 major_version, minor_version, name->as_C_string());
3835 Exceptions::fthrow(
3836 THREAD_AND_LOCATION,
3837 vmSymbols::java_lang_UnsupportedClassVersionError(),
3838 "Unsupported major.minor version for dump time %u.%u",
3839 major_version,
3840 minor_version);
3841 }
3842
3843 // Check version numbers - we check this even with verifier off
3844 if (!is_supported_version(major_version, minor_version)) {
3845 if (name == NULL) {
3846 Exceptions::fthrow(
3847 THREAD_AND_LOCATION,
3848 vmSymbols::java_lang_UnsupportedClassVersionError(),
3849 "Unsupported class file version %u.%u, "
3850 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
3851 major_version,
3852 minor_version,
3853 JAVA_MAX_SUPPORTED_VERSION,
3854 JAVA_MAX_SUPPORTED_MINOR_VERSION);
3855 } else {
3856 ResourceMark rm(THREAD);
3857 Exceptions::fthrow(
3858 THREAD_AND_LOCATION,
3859 vmSymbols::java_lang_UnsupportedClassVersionError(),
3860 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
3861 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
3862 name->as_C_string(),
3863 major_version,
3864 minor_version,
3865 JAVA_MAX_SUPPORTED_VERSION,
3866 JAVA_MAX_SUPPORTED_MINOR_VERSION);
3867 }
3868 return nullHandle;
3869 }
3870
3871 _major_version = major_version;
3872 _minor_version = minor_version;
3873
3874
3875 // Check if verification needs to be relaxed for this class file
3876 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3877 _relax_verify = Verifier::relax_verify_for(class_loader());
3878
3879 // Constant pool
3880 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
3881
3882 int cp_size = cp->length();
3883
3884 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
3885
3886 // Access flags
3887 AccessFlags access_flags;
3888 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3889
3890 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3891 // Set abstract bit for old class files for backward compatibility
3892 flags |= JVM_ACC_ABSTRACT;
3893 }
3894 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3895 access_flags.set_flags(flags);
3896
3897 // This class and superclass
3898 u2 this_class_index = cfs->get_u2_fast();
3899 check_property(
3900 valid_cp_range(this_class_index, cp_size) &&
3901 cp->tag_at(this_class_index).is_unresolved_klass(),
3902 "Invalid this class index %u in constant pool in class file %s",
3903 this_class_index, CHECK_(nullHandle));
3904
3905 Symbol* class_name = cp->klass_name_at(this_class_index);
3906 assert(class_name != NULL, "class_name can't be null");
3907
3908 // It's important to set parsed_name *before* resolving the super class.
3909 // (it's used for cleanup by the caller if parsing fails)
3910 parsed_name = class_name;
3911 // parsed_name is returned and can be used if there's an error, so add to
3912 // its reference count. Caller will decrement the refcount.
3913 parsed_name->increment_refcount();
3914
3915 // Update _class_name which could be null previously to be class_name
3916 _class_name = class_name;
3917
3918 // Don't need to check whether this class name is legal or not.
3919 // It has been checked when constant pool is parsed.
3920 // However, make sure it is not an array type.
3921 if (_need_verify) {
3922 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3923 "Bad class name in class file %s",
3924 CHECK_(nullHandle));
3925 }
3926
3927 Klass* preserve_this_klass; // for storing result across HandleMark
3928
3929 // release all handles when parsing is done
3930 { HandleMark hm(THREAD);
3931
3932 // Checks if name in class file matches requested name
3933 if (name != NULL && class_name != name) {
3934 ResourceMark rm(THREAD);
3935 Exceptions::fthrow(
3936 THREAD_AND_LOCATION,
3937 vmSymbols::java_lang_NoClassDefFoundError(),
3938 "%s (wrong name: %s)",
3939 name->as_C_string(),
3940 class_name->as_C_string()
3941 );
3942 return nullHandle;
3943 }
3944
3945 if (TraceClassLoadingPreorder) {
3946 tty->print("[Loading %s", (name != NULL) ? name->as_klass_external_name() : "NoName");
3947 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3948 tty->print_cr("]");
3949 }
3950 #if INCLUDE_CDS
3951 if (DumpLoadedClassList != NULL && cfs->source() != NULL && classlist_file->is_open()) {
3952 // Only dump the classes that can be stored into CDS archive
3953 if (SystemDictionaryShared::is_sharing_possible(loader_data)) {
3954 if (name != NULL) {
3955 ResourceMark rm(THREAD);
3956 classlist_file->print_cr("%s", name->as_C_string());
3957 classlist_file->flush();
3958 }
3959 }
3960 }
3961 #endif
3962
3963 u2 super_class_index = cfs->get_u2_fast();
3964 instanceKlassHandle super_klass = parse_super_class(super_class_index,
3965 CHECK_NULL);
3966
3967 // Interfaces
3968 u2 itfs_len = cfs->get_u2_fast();
3969 Array<Klass*>* local_interfaces =
3970 parse_interfaces(itfs_len, protection_domain, _class_name,
3971 &has_default_methods, CHECK_(nullHandle));
3972
3973 u2 java_fields_count = 0;
3974 // Fields (offsets are filled in later)
3975 FieldAllocationCount fac;
3976 Array<u2>* fields = parse_fields(class_name,
3977 access_flags.is_interface(),
3978 &fac, &java_fields_count,
3979 CHECK_(nullHandle));
3980 // Methods
3981 bool has_final_method = false;
3982 AccessFlags promoted_flags;
3983 promoted_flags.set_flags(0);
3984 Array<Method*>* methods = parse_methods(access_flags.is_interface(),
3985 &promoted_flags,
3986 &has_final_method,
3987 &declares_default_methods,
3988 CHECK_(nullHandle));
3989
3990 if (declares_default_methods) {
3991 has_default_methods = true;
3992 }
3993
3994 // Additional attributes
3995 ClassAnnotationCollector parsed_annotations;
3996 parse_classfile_attributes(&parsed_annotations, CHECK_(nullHandle));
3997
3998 // Finalize the Annotations metadata object,
3999 // now that all annotation arrays have been created.
4000 create_combined_annotations(CHECK_(nullHandle));
4001
4002 // Make sure this is the end of class file stream
4003 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
4004
4005 // We check super class after class file is parsed and format is checked
4006 if (super_class_index > 0 && super_klass.is_null()) {
4007 Symbol* sk = cp->klass_name_at(super_class_index);
4008 if (access_flags.is_interface()) {
4009 // Before attempting to resolve the superclass, check for class format
4010 // errors not checked yet.
4011 guarantee_property(sk == vmSymbols::java_lang_Object(),
4012 "Interfaces must have java.lang.Object as superclass in class file %s",
4013 CHECK_(nullHandle));
4014 }
4015 Klass* k = SystemDictionary::resolve_super_or_fail(class_name, sk,
4016 class_loader,
4017 protection_domain,
4018 true,
4019 CHECK_(nullHandle));
4020
4021 KlassHandle kh (THREAD, k);
4022 super_klass = instanceKlassHandle(THREAD, kh());
4023 }
4024 if (super_klass.not_null()) {
4025
4026 if (super_klass->has_default_methods()) {
4027 has_default_methods = true;
4028 }
4029
4030 if (super_klass->is_interface()) {
4031 ResourceMark rm(THREAD);
4032 Exceptions::fthrow(
4033 THREAD_AND_LOCATION,
4034 vmSymbols::java_lang_IncompatibleClassChangeError(),
4035 "class %s has interface %s as super class",
4036 class_name->as_klass_external_name(),
4037 super_klass->external_name()
4038 );
4039 return nullHandle;
4040 }
4041 // Make sure super class is not final
4042 if (super_klass->is_final()) {
4043 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
4044 }
4045 }
4046
4047 // save super klass for error handling.
4048 _super_klass = super_klass;
4049
4050 // Compute the transitive list of all unique interfaces implemented by this class
4051 _transitive_interfaces =
4052 compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
4053
4054 // sort methods
4055 intArray* method_ordering = sort_methods(methods);
4056
4057 // promote flags from parse_methods() to the klass' flags
4058 access_flags.add_promoted_flags(promoted_flags.as_int());
4059
4060 // Size of Java vtable (in words)
4061 int vtable_size = 0;
4062 int itable_size = 0;
4063 int num_miranda_methods = 0;
4064
4065 GrowableArray<Method*> all_mirandas(20);
4066
4067 klassVtable::compute_vtable_size_and_num_mirandas(
4068 &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods,
4069 access_flags, class_loader, class_name, local_interfaces,
4070 CHECK_(nullHandle));
4071
4072 // Size of Java itable (in words)
4073 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(_transitive_interfaces);
4074
4075 FieldLayoutInfo info;
4076 layout_fields(class_loader, &fac, &parsed_annotations, &info, CHECK_NULL);
4077
4078 int total_oop_map_size2 =
4079 InstanceKlass::nonstatic_oop_map_size(info.total_oop_map_count);
4080
4081 // Compute reference type
4082 ReferenceType rt;
4083 if (super_klass() == NULL) {
4084 rt = REF_NONE;
4085 } else {
4086 rt = super_klass->reference_type();
4087 }
4088
4089 // We can now create the basic Klass* for this klass
4090 _klass = InstanceKlass::allocate_instance_klass(loader_data,
4091 vtable_size,
4092 itable_size,
4093 info.static_field_size,
4094 total_oop_map_size2,
4095 rt,
4096 access_flags,
4097 name,
4098 super_klass(),
4099 !host_klass.is_null(),
4100 CHECK_(nullHandle));
4101 instanceKlassHandle this_klass (THREAD, _klass);
4102
4103 assert(this_klass->static_field_size() == info.static_field_size, "sanity");
4104 assert(this_klass->nonstatic_oop_map_count() == info.total_oop_map_count,
4105 "sanity");
4106
4107 // Fill in information already parsed
4108 this_klass->set_should_verify_class(verify);
4109 jint lh = Klass::instance_layout_helper(info.instance_size, false);
4110 this_klass->set_layout_helper(lh);
4111 assert(this_klass->oop_is_instance(), "layout is correct");
4112 assert(this_klass->size_helper() == info.instance_size, "correct size_helper");
4113 // Not yet: supers are done below to support the new subtype-checking fields
4114 //this_klass->set_super(super_klass());
4115 this_klass->set_class_loader_data(loader_data);
4116 this_klass->set_nonstatic_field_size(info.nonstatic_field_size);
4117 this_klass->set_has_nonstatic_fields(info.has_nonstatic_fields);
4118 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
4119
4120 apply_parsed_class_metadata(this_klass, java_fields_count, CHECK_NULL);
4121
4122 if (has_final_method) {
4123 this_klass->set_has_final_method();
4124 }
4125 this_klass->copy_method_ordering(method_ordering, CHECK_NULL);
4126 // The InstanceKlass::_methods_jmethod_ids cache
4127 // is managed on the assumption that the initial cache
4128 // size is equal to the number of methods in the class. If
4129 // that changes, then InstanceKlass::idnum_can_increment()
4130 // has to be changed accordingly.
4131 this_klass->set_initial_method_idnum(methods->length());
4132 this_klass->set_name(cp->klass_name_at(this_class_index));
4133 if (is_anonymous()) // I am well known to myself
4134 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
4135
4136 this_klass->set_minor_version(minor_version);
4137 this_klass->set_major_version(major_version);
4138 this_klass->set_has_default_methods(has_default_methods);
4139 this_klass->set_declares_default_methods(declares_default_methods);
4140
4141 if (!host_klass.is_null()) {
4142 assert (this_klass->is_anonymous(), "should be the same");
4143 this_klass->set_host_klass(host_klass());
4144 }
4145
4146 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4147 // (We used to do this lazily, but now we query it in Rewriter,
4148 // which is eagerly done for every method, so we might as well do it now,
4149 // when everything is fresh in memory.)
4150 vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(this_klass());
4151 if (klass_id != vmSymbols::NO_SID) {
4152 for (int j = 0; j < methods->length(); j++) {
4153 Method* method = methods->at(j);
4154 method->init_intrinsic_id();
4155
4156 if (CheckIntrinsics) {
4157 // Check if an intrinsic is defined for method 'method',
4158 // but the method is not annotated with @HotSpotIntrinsicCandidate.
4159 if (method->intrinsic_id() != vmIntrinsics::_none &&
4160 !method->intrinsic_candidate()) {
4161 tty->print("Compiler intrinsic is defined for method [%s], "
4162 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
4163 method->name_and_sig_as_C_string(),
4164 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
4165 );
4166 tty->cr();
4167 DEBUG_ONLY(vm_exit(1));
4168 }
4169 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
4170 // but there is no intrinsic available for it.
4171 if (method->intrinsic_candidate() &&
4172 method->intrinsic_id() == vmIntrinsics::_none) {
4173 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
4174 "but no compiler intrinsic is defined for the method.%s",
4175 method->name_and_sig_as_C_string(),
4176 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4177 );
4178 tty->cr();
4179 DEBUG_ONLY(vm_exit(1));
4180 }
4181 }
4182 }
4183
4184 #ifdef ASSERT
4185 if (CheckIntrinsics) {
4186 // Check for orphan methods in the current class. A method m
4187 // of a class C is orphan if an intrinsic is defined for method m,
4188 // but class C does not declare m.
4189 // The check is potentially expensive, therefore it is available
4190 // only in debug builds.
4191
4192 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; id++) {
4193 if (id == vmIntrinsics::_compiledLambdaForm) {
4194 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
4195 // generated for the JVM from a LambdaForm and therefore no method
4196 // is defined for it.
4197 continue;
4198 }
4199
4200 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
4201 // Check if the current class contains a method with the same
4202 // name, flags, signature.
4203 bool match = false;
4204 for (int j = 0; j < methods->length(); j++) {
4205 Method* method = methods->at(j);
4206 if (id == method->intrinsic_id()) {
4207 match = true;
4208 break;
4209 }
4210 }
4211
4212 if (!match) {
4213 char buf[1000];
4214 tty->print("Compiler intrinsic is defined for method [%s], "
4215 "but the method is not available in class [%s].%s",
4216 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id), buf, sizeof(buf)),
4217 this_klass->name()->as_C_string(),
4218 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4219 );
4220 tty->cr();
4221 DEBUG_ONLY(vm_exit(1));
4222 }
4223 }
4224 }
4225 }
4226 #endif // ASSERT
4227 }
4228
4229
4230 if (cached_class_file != NULL) {
4231 // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
4232 this_klass->set_cached_class_file(cached_class_file);
4233 }
4234
4235 // Fill in field values obtained by parse_classfile_attributes
4236 if (parsed_annotations.has_any_annotations())
4237 parsed_annotations.apply_to(this_klass);
4238 apply_parsed_class_attributes(this_klass);
4239
4240 // Miranda methods
4241 if ((num_miranda_methods > 0) ||
4242 // if this class introduced new miranda methods or
4243 (super_klass.not_null() && (super_klass->has_miranda_methods()))
4244 // super class exists and this class inherited miranda methods
4245 ) {
4246 this_klass->set_has_miranda_methods(); // then set a flag
4247 }
4248
4249 // Fill in information needed to compute superclasses.
4250 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
4251
4252 // Initialize itable offset tables
4253 klassItable::setup_itable_offset_table(this_klass);
4254
4255 // Compute transitive closure of interfaces this class implements
4256 // Do final class setup
4257 fill_oop_maps(this_klass, info.nonstatic_oop_map_count, info.nonstatic_oop_offsets, info.nonstatic_oop_counts);
4258
4259 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
4260 set_precomputed_flags(this_klass);
4261
4262 // reinitialize modifiers, using the InnerClasses attribute
4263 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
4264 this_klass->set_modifier_flags(computed_modifiers);
4265
4266 // check if this class can access its super class
4267 check_super_class_access(this_klass, CHECK_(nullHandle));
4268
4269 // check if this class can access its superinterfaces
4270 check_super_interface_access(this_klass, CHECK_(nullHandle));
4271
4272 // check if this class overrides any final method
4273 check_final_method_override(this_klass, CHECK_(nullHandle));
4274
4275 // check that if this class is an interface then it doesn't have static methods
4276 if (this_klass->is_interface()) {
4277 /* An interface in a JAVA 8 classfile can be static */
4278 if (_major_version < JAVA_8_VERSION) {
4279 check_illegal_static_method(this_klass, CHECK_(nullHandle));
4280 }
4281 }
4282
4283 // Allocate mirror and initialize static fields
4284 java_lang_Class::create_mirror(this_klass, class_loader, protection_domain,
4285 CHECK_(nullHandle));
4286
4287 // Generate any default methods - default methods are interface methods
4288 // that have a default implementation. This is new with Lambda project.
4289 if (has_default_methods ) {
4290 DefaultMethods::generate_default_methods(
4291 this_klass(), &all_mirandas, CHECK_(nullHandle));
4292 }
4293
4294 // Update the loader_data graph.
4295 record_defined_class_dependencies(this_klass, CHECK_NULL);
4296
4297 ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
4298 false /* not shared class */);
4299
4300 if (TraceClassLoading) {
4301 ResourceMark rm;
4302 // print in a single call to reduce interleaving of output
4303 if (cfs->source() != NULL) {
4304 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4305 cfs->source());
4306 } else if (class_loader.is_null()) {
4307 Klass* caller =
4308 THREAD->is_Java_thread()
4309 ? ((JavaThread*)THREAD)->security_get_caller_class(1)
4310 : NULL;
4311 // caller can be NULL, for example, during a JVMTI VM_Init hook
4312 if (caller != NULL) {
4313 tty->print("[Loaded %s by instance of %s]\n",
4314 this_klass->external_name(),
4315 InstanceKlass::cast(caller)->external_name());
4316 } else {
4317 tty->print("[Loaded %s]\n", this_klass->external_name());
4318 }
4319 } else {
4320 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4321 InstanceKlass::cast(class_loader->klass())->external_name());
4322 }
4323 }
4324
4325 if (TraceClassResolution) {
4326 ResourceMark rm;
4327 // print out the superclass.
4328 const char * from = this_klass()->external_name();
4329 if (this_klass->java_super() != NULL) {
4330 tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name());
4331 }
4332 // print out each of the interface classes referred to by this class.
4333 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4334 if (local_interfaces != NULL) {
4335 int length = local_interfaces->length();
4336 for (int i = 0; i < length; i++) {
4337 Klass* k = local_interfaces->at(i);
4338 InstanceKlass* to_class = InstanceKlass::cast(k);
4339 const char * to = to_class->external_name();
4340 tty->print("RESOLVE %s %s (interface)\n", from, to);
4341 }
4342 }
4343 }
4344
4345 // preserve result across HandleMark
4346 preserve_this_klass = this_klass();
4347 }
4348
4349 // Create new handle outside HandleMark (might be needed for
4350 // Extended Class Redefinition)
4351 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
4352 debug_only(this_klass->verify();)
4353
4354 // Clear class if no error has occurred so destructor doesn't deallocate it
4355 _klass = NULL;
4356 return this_klass;
4357 }
4358
4359 // Destructor to clean up if there's an error
4360 ClassFileParser::~ClassFileParser() {
4361 MetadataFactory::free_metadata(_loader_data, _cp);
4362 MetadataFactory::free_array<u2>(_loader_data, _fields);
4363
4364 // Free methods
4365 InstanceKlass::deallocate_methods(_loader_data, _methods);
4366
4367 // beware of the Universe::empty_blah_array!!
4368 if (_inner_classes != Universe::the_empty_short_array()) {
4369 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
4370 }
4371
4372 // Free interfaces
4373 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass(),
4374 _local_interfaces, _transitive_interfaces);
4375
4376 if (_combined_annotations != NULL) {
4377 // After all annotations arrays have been created, they are installed into the
4378 // Annotations object that will be assigned to the InstanceKlass being created.
4379
4380 // Deallocate the Annotations object and the installed annotations arrays.
4381 _combined_annotations->deallocate_contents(_loader_data);
4382
4383 // If the _combined_annotations pointer is non-NULL,
4384 // then the other annotations fields should have been cleared.
4385 assert(_annotations == NULL, "Should have been cleared");
4386 assert(_type_annotations == NULL, "Should have been cleared");
4387 assert(_fields_annotations == NULL, "Should have been cleared");
4388 assert(_fields_type_annotations == NULL, "Should have been cleared");
4389 } else {
4390 // If the annotations arrays were not installed into the Annotations object,
4391 // then they have to be deallocated explicitly.
4392 MetadataFactory::free_array<u1>(_loader_data, _annotations);
4393 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
4394 Annotations::free_contents(_loader_data, _fields_annotations);
4395 Annotations::free_contents(_loader_data, _fields_type_annotations);
4396 }
4397
4398 clear_class_metadata();
4399
4400 // deallocate the klass if already created. Don't directly deallocate, but add
4401 // to the deallocate list so that the klass is removed from the CLD::_klasses list
4402 // at a safepoint.
4403 if (_klass != NULL) {
4404 _loader_data->add_to_deallocate_list(_klass);
4405 }
4406 _klass = NULL;
4407 }
4408
4409 void ClassFileParser::print_field_layout(Symbol* name,
4410 Array<u2>* fields,
4411 constantPoolHandle cp,
4412 int instance_size,
4413 int instance_fields_start,
4414 int instance_fields_end,
4415 int static_fields_end) {
4416 tty->print("%s: field layout\n", name->as_klass_external_name());
4417 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
4418 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4419 if (!fs.access_flags().is_static()) {
4420 tty->print(" @%3d \"%s\" %s\n",
4421 fs.offset(),
4422 fs.name()->as_klass_external_name(),
4423 fs.signature()->as_klass_external_name());
4424 }
4425 }
4426 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
4427 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
4428 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
4429 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4430 if (fs.access_flags().is_static()) {
4431 tty->print(" @%3d \"%s\" %s\n",
4432 fs.offset(),
4433 fs.name()->as_klass_external_name(),
4434 fs.signature()->as_klass_external_name());
4435 }
4436 }
4437 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
4438 tty->print("\n");
4439 }
4440
4441 unsigned int
4442 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
4443 unsigned int nonstatic_oop_map_count,
4444 int first_nonstatic_oop_offset) {
4445 unsigned int map_count =
4446 super.is_null() ? 0 : super->nonstatic_oop_map_count();
4447 if (nonstatic_oop_map_count > 0) {
4448 // We have oops to add to map
4449 if (map_count == 0) {
4450 map_count = nonstatic_oop_map_count;
4451 } else {
4452 // Check whether we should add a new map block or whether the last one can
4453 // be extended
4454 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
4455 OopMapBlock* const last_map = first_map + map_count - 1;
4456
4457 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
4458 if (next_offset == first_nonstatic_oop_offset) {
4459 // There is no gap bettwen superklass's last oop field and first
4460 // local oop field, merge maps.
4461 nonstatic_oop_map_count -= 1;
4462 } else {
4463 // Superklass didn't end with a oop field, add extra maps
4464 assert(next_offset < first_nonstatic_oop_offset, "just checking");
4465 }
4466 map_count += nonstatic_oop_map_count;
4467 }
4468 }
4469 return map_count;
4470 }
4471
4472
4473 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
4474 unsigned int nonstatic_oop_map_count,
4475 int* nonstatic_oop_offsets,
4476 unsigned int* nonstatic_oop_counts) {
4477 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4478 const InstanceKlass* const super = k->superklass();
4479 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4480 if (super_count > 0) {
4481 // Copy maps from superklass
4482 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4483 for (unsigned int i = 0; i < super_count; ++i) {
4484 *this_oop_map++ = *super_oop_map++;
4485 }
4486 }
4487
4488 if (nonstatic_oop_map_count > 0) {
4489 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4490 // The counts differ because there is no gap between superklass's last oop
4491 // field and the first local oop field. Extend the last oop map copied
4492 // from the superklass instead of creating new one.
4493 nonstatic_oop_map_count--;
4494 nonstatic_oop_offsets++;
4495 this_oop_map--;
4496 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4497 this_oop_map++;
4498 }
4499
4500 // Add new map blocks, fill them
4501 while (nonstatic_oop_map_count-- > 0) {
4502 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4503 this_oop_map->set_count(*nonstatic_oop_counts++);
4504 this_oop_map++;
4505 }
4506 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4507 this_oop_map, "sanity");
4508 }
4509 }
4510
4511
4512 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
4513 Klass* super = k->super();
4514
4515 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4516 // in which case we don't have to register objects as finalizable
4517 if (!_has_empty_finalizer) {
4518 if (_has_finalizer ||
4519 (super != NULL && super->has_finalizer())) {
4520 k->set_has_finalizer();
4521 }
4522 }
4523
4524 #ifdef ASSERT
4525 bool f = false;
4526 Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
4527 vmSymbols::void_method_signature());
4528 if (m != NULL && !m->is_empty_method()) {
4529 f = true;
4530 }
4531
4532 // Spec doesn't prevent agent from redefinition of empty finalizer.
4533 // Despite the fact that it's generally bad idea and redefined finalizer
4534 // will not work as expected we shouldn't abort vm in this case
4535 if (!k->has_redefined_this_or_super()) {
4536 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
4537 }
4538 #endif
4539
4540 // Check if this klass supports the java.lang.Cloneable interface
4541 if (SystemDictionary::Cloneable_klass_loaded()) {
4542 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4543 k->set_is_cloneable();
4544 }
4545 }
4546
4547 // Check if this klass has a vanilla default constructor
4548 if (super == NULL) {
4549 // java.lang.Object has empty default constructor
4550 k->set_has_vanilla_constructor();
4551 } else {
4552 if (super->has_vanilla_constructor() &&
4553 _has_vanilla_constructor) {
4554 k->set_has_vanilla_constructor();
4555 }
4556 #ifdef ASSERT
4557 bool v = false;
4558 if (super->has_vanilla_constructor()) {
4559 Method* constructor = k->find_method(vmSymbols::object_initializer_name(
4560 ), vmSymbols::void_method_signature());
4561 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4562 v = true;
4563 }
4564 }
4565 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4566 #endif
4567 }
4568
4569 // If it cannot be fast-path allocated, set a bit in the layout helper.
4570 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4571 assert(k->size_helper() > 0, "layout_helper is initialized");
4572 if ((!RegisterFinalizersAtInit && k->has_finalizer())
4573 || k->is_abstract() || k->is_interface()
4574 || (k->name() == vmSymbols::java_lang_Class() && k->class_loader() == NULL)
4575 || k->size_helper() >= FastAllocateSizeLimit) {
4576 // Forbid fast-path allocation.
4577 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
4578 k->set_layout_helper(lh);
4579 }
4580 }
4581
4582 // Attach super classes and interface classes to class loader data
4583 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
4584 ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
4585 if (defining_loader_data->is_the_null_class_loader_data()) {
4586 // Dependencies to null class loader data are implicit.
4587 return;
4588 } else {
4589 // add super class dependency
4590 Klass* super = defined_klass->super();
4591 if (super != NULL) {
4592 defining_loader_data->record_dependency(super, CHECK);
4593 }
4594
4595 // add super interface dependencies
4596 Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
4597 if (local_interfaces != NULL) {
4598 int length = local_interfaces->length();
4599 for (int i = 0; i < length; i++) {
4600 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4601 }
4602 }
4603 }
4604 }
4605
4606 // utility methods for appending an array with check for duplicates
4607
4608 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
4609 // iterate over new interfaces
4610 for (int i = 0; i < ifs->length(); i++) {
4611 Klass* e = ifs->at(i);
4612 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4613 // add new interface
4614 result->append_if_missing(e);
4615 }
4616 }
4617
4618 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(
4619 instanceKlassHandle super,
4620 Array<Klass*>* local_ifs, TRAPS) {
4621 // Compute maximum size for transitive interfaces
4622 int max_transitive_size = 0;
4623 int super_size = 0;
4624 // Add superclass transitive interfaces size
4625 if (super.not_null()) {
4626 super_size = super->transitive_interfaces()->length();
4627 max_transitive_size += super_size;
4628 }
4629 // Add local interfaces' super interfaces
4630 int local_size = local_ifs->length();
4631 for (int i = 0; i < local_size; i++) {
4632 Klass* l = local_ifs->at(i);
4633 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4634 }
4635 // Finally add local interfaces
4636 max_transitive_size += local_size;
4637 // Construct array
4638 if (max_transitive_size == 0) {
4639 // no interfaces, use canonicalized array
4640 return Universe::the_empty_klass_array();
4641 } else if (max_transitive_size == super_size) {
4642 // no new local interfaces added, share superklass' transitive interface array
4643 return super->transitive_interfaces();
4644 } else if (max_transitive_size == local_size) {
4645 // only local interfaces added, share local interface array
4646 return local_ifs;
4647 } else {
4648 ResourceMark rm;
4649 GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
4650
4651 // Copy down from superclass
4652 if (super.not_null()) {
4653 append_interfaces(result, super->transitive_interfaces());
4654 }
4655
4656 // Copy down from local interfaces' superinterfaces
4657 for (int i = 0; i < local_ifs->length(); i++) {
4658 Klass* l = local_ifs->at(i);
4659 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4660 }
4661 // Finally add local interfaces
4662 append_interfaces(result, local_ifs);
4663
4664 // length will be less than the max_transitive_size if duplicates were removed
4665 int length = result->length();
4666 assert(length <= max_transitive_size, "just checking");
4667 Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(_loader_data, length, CHECK_NULL);
4668 for (int i = 0; i < length; i++) {
4669 Klass* e = result->at(i);
4670 assert(e != NULL, "just checking");
4671 new_result->at_put(i, e);
4672 }
4673 return new_result;
4674 }
4675 }
4676
4677 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
4678 Klass* super = this_klass->super();
4679 if ((super != NULL) &&
4680 (!Reflection::verify_class_access(this_klass(), super, false))) {
4681 ResourceMark rm(THREAD);
4682 Exceptions::fthrow(
4683 THREAD_AND_LOCATION,
4684 vmSymbols::java_lang_IllegalAccessError(),
4685 "class %s cannot access its superclass %s",
4686 this_klass->external_name(),
4687 InstanceKlass::cast(super)->external_name()
4688 );
4689 return;
4690 }
4691 }
4692
4693
4694 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4695 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4696 int lng = local_interfaces->length();
4697 for (int i = lng - 1; i >= 0; i--) {
4698 Klass* k = local_interfaces->at(i);
4699 assert (k != NULL && k->is_interface(), "invalid interface");
4700 if (!Reflection::verify_class_access(this_klass(), k, false)) {
4701 ResourceMark rm(THREAD);
4702 Exceptions::fthrow(
4703 THREAD_AND_LOCATION,
4704 vmSymbols::java_lang_IllegalAccessError(),
4705 "class %s cannot access its superinterface %s",
4706 this_klass->external_name(),
4707 InstanceKlass::cast(k)->external_name()
4708 );
4709 return;
4710 }
4711 }
4712 }
4713
4714
4715 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4716 Array<Method*>* methods = this_klass->methods();
4717 int num_methods = methods->length();
4718
4719 // go thru each method and check if it overrides a final method
4720 for (int index = 0; index < num_methods; index++) {
4721 Method* m = methods->at(index);
4722
4723 // skip private, static, and <init> methods
4724 if ((!m->is_private() && !m->is_static()) &&
4725 (m->name() != vmSymbols::object_initializer_name())) {
4726
4727 Symbol* name = m->name();
4728 Symbol* signature = m->signature();
4729 Klass* k = this_klass->super();
4730 Method* super_m = NULL;
4731 while (k != NULL) {
4732 // skip supers that don't have final methods.
4733 if (k->has_final_method()) {
4734 // lookup a matching method in the super class hierarchy
4735 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4736 if (super_m == NULL) {
4737 break; // didn't find any match; get out
4738 }
4739
4740 if (super_m->is_final() && !super_m->is_static() &&
4741 // matching method in super is final, and not static
4742 (Reflection::verify_field_access(this_klass(),
4743 super_m->method_holder(),
4744 super_m->method_holder(),
4745 super_m->access_flags(), false))
4746 // this class can access super final method and therefore override
4747 ) {
4748 ResourceMark rm(THREAD);
4749 Exceptions::fthrow(
4750 THREAD_AND_LOCATION,
4751 vmSymbols::java_lang_VerifyError(),
4752 "class %s overrides final method %s.%s%s",
4753 this_klass->external_name(),
4754 super_m->method_holder()->external_name(),
4755 name->as_C_string(),
4756 signature->as_C_string()
4757 );
4758 return;
4759 }
4760
4761 // continue to look from super_m's holder's super.
4762 k = super_m->method_holder()->super();
4763 continue;
4764 }
4765
4766 k = k->super();
4767 }
4768 }
4769 }
4770 }
4771
4772
4773 // assumes that this_klass is an interface
4774 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4775 assert(this_klass->is_interface(), "not an interface");
4776 Array<Method*>* methods = this_klass->methods();
4777 int num_methods = methods->length();
4778
4779 for (int index = 0; index < num_methods; index++) {
4780 Method* m = methods->at(index);
4781 // if m is static and not the init method, throw a verify error
4782 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4783 ResourceMark rm(THREAD);
4784 Exceptions::fthrow(
4785 THREAD_AND_LOCATION,
4786 vmSymbols::java_lang_VerifyError(),
4787 "Illegal static method %s in interface %s",
4788 m->name()->as_C_string(),
4789 this_klass->external_name()
4790 );
4791 return;
4792 }
4793 }
4794 }
4795
4796 // utility methods for format checking
4797
4798 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4799 if (!_need_verify) { return; }
4800
4801 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4802 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4803 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4804 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4805 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4806 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4807 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4808
4809 if ((is_abstract && is_final) ||
4810 (is_interface && !is_abstract) ||
4811 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4812 (!is_interface && major_gte_15 && is_annotation)) {
4813 ResourceMark rm(THREAD);
4814 Exceptions::fthrow(
4815 THREAD_AND_LOCATION,
4816 vmSymbols::java_lang_ClassFormatError(),
4817 "Illegal class modifiers in class %s: 0x%X",
4818 _class_name->as_C_string(), flags
4819 );
4820 return;
4821 }
4822 }
4823
4824 bool ClassFileParser::has_illegal_visibility(jint flags) {
4825 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4826 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4827 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4828
4829 return ((is_public && is_protected) ||
4830 (is_public && is_private) ||
4831 (is_protected && is_private));
4832 }
4833
4834 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4835 u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4836 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4837 (major <= max_version) &&
4838 ((major != max_version) ||
4839 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4840 }
4841
4842 void ClassFileParser::verify_legal_field_modifiers(
4843 jint flags, bool is_interface, TRAPS) {
4844 if (!_need_verify) { return; }
4845
4846 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4847 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4848 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4849 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4850 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4851 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4852 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4853 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4854 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4855
4856 bool is_illegal = false;
4857
4858 if (is_interface) {
4859 if (!is_public || !is_static || !is_final || is_private ||
4860 is_protected || is_volatile || is_transient ||
4861 (major_gte_15 && is_enum)) {
4862 is_illegal = true;
4863 }
4864 } else { // not interface
4865 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4866 is_illegal = true;
4867 }
4868 }
4869
4870 if (is_illegal) {
4871 ResourceMark rm(THREAD);
4872 Exceptions::fthrow(
4873 THREAD_AND_LOCATION,
4874 vmSymbols::java_lang_ClassFormatError(),
4875 "Illegal field modifiers in class %s: 0x%X",
4876 _class_name->as_C_string(), flags);
4877 return;
4878 }
4879 }
4880
4881 void ClassFileParser::verify_legal_method_modifiers(
4882 jint flags, bool is_interface, Symbol* name, TRAPS) {
4883 if (!_need_verify) { return; }
4884
4885 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4886 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4887 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4888 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4889 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4890 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4891 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4892 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4893 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4894 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4895 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4896 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4897 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4898
4899 bool is_illegal = false;
4900
4901 if (is_interface) {
4902 if (major_gte_8) {
4903 // Class file version is JAVA_8_VERSION or later Methods of
4904 // interfaces may set any of the flags except ACC_PROTECTED,
4905 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4906 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4907 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4908 (is_native || is_protected || is_final || is_synchronized) ||
4909 // If a specific method of a class or interface has its
4910 // ACC_ABSTRACT flag set, it must not have any of its
4911 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4912 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4913 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4914 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4915 (is_abstract && (is_private || is_static || is_strict))) {
4916 is_illegal = true;
4917 }
4918 } else if (major_gte_15) {
4919 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4920 if (!is_public || is_static || is_final || is_synchronized ||
4921 is_native || !is_abstract || is_strict) {
4922 is_illegal = true;
4923 }
4924 } else {
4925 // Class file version is pre-JAVA_1_5_VERSION
4926 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4927 is_illegal = true;
4928 }
4929 }
4930 } else { // not interface
4931 if (has_illegal_visibility(flags)) {
4932 is_illegal = true;
4933 } else {
4934 if (is_initializer) {
4935 if (is_static || is_final || is_synchronized || is_native ||
4936 is_abstract || (major_gte_15 && is_bridge)) {
4937 is_illegal = true;
4938 }
4939 } else { // not initializer
4940 if (is_abstract) {
4941 if ((is_final || is_native || is_private || is_static ||
4942 (major_gte_15 && (is_synchronized || is_strict)))) {
4943 is_illegal = true;
4944 }
4945 }
4946 }
4947 }
4948 }
4949
4950 if (is_illegal) {
4951 ResourceMark rm(THREAD);
4952 Exceptions::fthrow(
4953 THREAD_AND_LOCATION,
4954 vmSymbols::java_lang_ClassFormatError(),
4955 "Method %s in class %s has illegal modifiers: 0x%X",
4956 name->as_C_string(), _class_name->as_C_string(), flags);
4957 return;
4958 }
4959 }
4960
4961 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4962 assert(_need_verify, "only called when _need_verify is true");
4963 int i = 0;
4964 int count = length >> 2;
4965 for (int k=0; k<count; k++) {
4966 unsigned char b0 = buffer[i];
4967 unsigned char b1 = buffer[i+1];
4968 unsigned char b2 = buffer[i+2];
4969 unsigned char b3 = buffer[i+3];
4970 // For an unsigned char v,
4971 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4972 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4973 unsigned char res = b0 | b0 - 1 |
4974 b1 | b1 - 1 |
4975 b2 | b2 - 1 |
4976 b3 | b3 - 1;
4977 if (res >= 128) break;
4978 i += 4;
4979 }
4980 for(; i < length; i++) {
4981 unsigned short c;
4982 // no embedded zeros
4983 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4984 if(buffer[i] < 128) {
4985 continue;
4986 }
4987 if ((i + 5) < length) { // see if it's legal supplementary character
4988 if (UTF8::is_supplementary_character(&buffer[i])) {
4989 c = UTF8::get_supplementary_character(&buffer[i]);
4990 i += 5;
4991 continue;
4992 }
4993 }
4994 switch (buffer[i] >> 4) {
4995 default: break;
4996 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4997 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4998 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4999 c = (buffer[i] & 0x1F) << 6;
5000 i++;
5001 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
5002 c += buffer[i] & 0x3F;
5003 if (_major_version <= 47 || c == 0 || c >= 0x80) {
5004 // for classes with major > 47, c must a null or a character in its shortest form
5005 break;
5006 }
5007 }
5008 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5009 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
5010 c = (buffer[i] & 0xF) << 12;
5011 i += 2;
5012 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
5013 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
5014 if (_major_version <= 47 || c >= 0x800) {
5015 // for classes with major > 47, c must be in its shortest form
5016 break;
5017 }
5018 }
5019 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5020 } // end of switch
5021 } // end of for
5022 }
5023
5024 // Checks if name is a legal class name.
5025 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
5026 if (!_need_verify || _relax_verify) { return; }
5027
5028 char buf[fixed_buffer_size];
5029 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5030 unsigned int length = name->utf8_length();
5031 bool legal = false;
5032
5033 if (length > 0) {
5034 char* p;
5035 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5036 p = skip_over_field_signature(bytes, false, length, CHECK);
5037 legal = (p != NULL) && ((p - bytes) == (int)length);
5038 } else if (_major_version < JAVA_1_5_VERSION) {
5039 if (bytes[0] != '<') {
5040 p = skip_over_field_name(bytes, true, length);
5041 legal = (p != NULL) && ((p - bytes) == (int)length);
5042 }
5043 } else {
5044 // 4900761: relax the constraints based on JSR202 spec
5045 // Class names may be drawn from the entire Unicode character set.
5046 // Identifiers between '/' must be unqualified names.
5047 // The utf8 string has been verified when parsing cpool entries.
5048 legal = verify_unqualified_name(bytes, length, LegalClass);
5049 }
5050 }
5051 if (!legal) {
5052 ResourceMark rm(THREAD);
5053 Exceptions::fthrow(
5054 THREAD_AND_LOCATION,
5055 vmSymbols::java_lang_ClassFormatError(),
5056 "Illegal class name \"%s\" in class file %s", bytes,
5057 _class_name->as_C_string()
5058 );
5059 return;
5060 }
5061 }
5062
5063 // Checks if name is a legal field name.
5064 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
5065 if (!_need_verify || _relax_verify) { return; }
5066
5067 char buf[fixed_buffer_size];
5068 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5069 unsigned int length = name->utf8_length();
5070 bool legal = false;
5071
5072 if (length > 0) {
5073 if (_major_version < JAVA_1_5_VERSION) {
5074 if (bytes[0] != '<') {
5075 char* p = skip_over_field_name(bytes, false, length);
5076 legal = (p != NULL) && ((p - bytes) == (int)length);
5077 }
5078 } else {
5079 // 4881221: relax the constraints based on JSR202 spec
5080 legal = verify_unqualified_name(bytes, length, LegalField);
5081 }
5082 }
5083
5084 if (!legal) {
5085 ResourceMark rm(THREAD);
5086 Exceptions::fthrow(
5087 THREAD_AND_LOCATION,
5088 vmSymbols::java_lang_ClassFormatError(),
5089 "Illegal field name \"%s\" in class %s", bytes,
5090 _class_name->as_C_string()
5091 );
5092 return;
5093 }
5094 }
5095
5096 // Checks if name is a legal method name.
5097 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
5098 if (!_need_verify || _relax_verify) { return; }
5099
5100 assert(name != NULL, "method name is null");
5101 char buf[fixed_buffer_size];
5102 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5103 unsigned int length = name->utf8_length();
5104 bool legal = false;
5105
5106 if (length > 0) {
5107 if (bytes[0] == '<') {
5108 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5109 legal = true;
5110 }
5111 } else if (_major_version < JAVA_1_5_VERSION) {
5112 char* p;
5113 p = skip_over_field_name(bytes, false, length);
5114 legal = (p != NULL) && ((p - bytes) == (int)length);
5115 } else {
5116 // 4881221: relax the constraints based on JSR202 spec
5117 legal = verify_unqualified_name(bytes, length, LegalMethod);
5118 }
5119 }
5120
5121 if (!legal) {
5122 ResourceMark rm(THREAD);
5123 Exceptions::fthrow(
5124 THREAD_AND_LOCATION,
5125 vmSymbols::java_lang_ClassFormatError(),
5126 "Illegal method name \"%s\" in class %s", bytes,
5127 _class_name->as_C_string()
5128 );
5129 return;
5130 }
5131 }
5132
5133
5134 // Checks if signature is a legal field signature.
5135 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
5136 if (!_need_verify) { return; }
5137
5138 char buf[fixed_buffer_size];
5139 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5140 unsigned int length = signature->utf8_length();
5141 char* p = skip_over_field_signature(bytes, false, length, CHECK);
5142
5143 if (p == NULL || (p - bytes) != (int)length) {
5144 throwIllegalSignature("Field", name, signature, CHECK);
5145 }
5146 }
5147
5148 // Checks if signature is a legal method signature.
5149 // Returns number of parameters
5150 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
5151 if (!_need_verify) {
5152 // make sure caller's args_size will be less than 0 even for non-static
5153 // method so it will be recomputed in compute_size_of_parameters().
5154 return -2;
5155 }
5156
5157 unsigned int args_size = 0;
5158 char buf[fixed_buffer_size];
5159 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5160 unsigned int length = signature->utf8_length();
5161 char* nextp;
5162
5163 // The first character must be a '('
5164 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5165 length--;
5166 // Skip over legal field signatures
5167 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5168 while ((length > 0) && (nextp != NULL)) {
5169 args_size++;
5170 if (p[0] == 'J' || p[0] == 'D') {
5171 args_size++;
5172 }
5173 length -= nextp - p;
5174 p = nextp;
5175 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5176 }
5177 // The first non-signature thing better be a ')'
5178 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5179 length--;
5180 if (name == vmSymbols::object_initializer_name()) {
5181 // All "<init>" methods must return void
5182 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5183 return args_size;
5184 }
5185 } else {
5186 // Now we better just have a return value
5187 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5188 if (nextp && ((int)length == (nextp - p))) {
5189 return args_size;
5190 }
5191 }
5192 }
5193 }
5194 // Report error
5195 throwIllegalSignature("Method", name, signature, CHECK_0);
5196 return 0;
5197 }
5198
5199
5200 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5201 // Method names also may not contain the characters '<' or '>', unless <init>
5202 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5203 // method. Because these names have been checked as special cases before
5204 // calling this method in verify_legal_method_name.
5205 bool ClassFileParser::verify_unqualified_name(
5206 char* name, unsigned int length, int type) {
5207 jchar ch;
5208
5209 for (char* p = name; p != name + length; ) {
5210 ch = *p;
5211 if (ch < 128) {
5212 p++;
5213 if (ch == '.' || ch == ';' || ch == '[' ) {
5214 return false; // do not permit '.', ';', or '['
5215 }
5216 if (type != LegalClass && ch == '/') {
5217 return false; // do not permit '/' unless it's class name
5218 }
5219 if (type == LegalMethod && (ch == '<' || ch == '>')) {
5220 return false; // do not permit '<' or '>' in method names
5221 }
5222 } else {
5223 char* tmp_p = UTF8::next(p, &ch);
5224 p = tmp_p;
5225 }
5226 }
5227 return true;
5228 }
5229
5230
5231 // Take pointer to a string. Skip over the longest part of the string that could
5232 // be taken as a fieldname. Allow '/' if slash_ok is true.
5233 // Return a pointer to just past the fieldname.
5234 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5235 // being true, we saw consecutive slashes (meaning we were looking for a
5236 // qualified path but found something that was badly-formed).
5237 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
5238 char* p;
5239 jchar ch;
5240 jboolean last_is_slash = false;
5241 jboolean not_first_ch = false;
5242
5243 for (p = name; p != name + length; not_first_ch = true) {
5244 char* old_p = p;
5245 ch = *p;
5246 if (ch < 128) {
5247 p++;
5248 // quick check for ascii
5249 if ((ch >= 'a' && ch <= 'z') ||
5250 (ch >= 'A' && ch <= 'Z') ||
5251 (ch == '_' || ch == '$') ||
5252 (not_first_ch && ch >= '0' && ch <= '9')) {
5253 last_is_slash = false;
5254 continue;
5255 }
5256 if (slash_ok && ch == '/') {
5257 if (last_is_slash) {
5258 return NULL; // Don't permit consecutive slashes
5259 }
5260 last_is_slash = true;
5261 continue;
5262 }
5263 } else {
5264 jint unicode_ch;
5265 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5266 p = tmp_p;
5267 last_is_slash = false;
5268 // Check if ch is Java identifier start or is Java identifier part
5269 // 4672820: call java.lang.Character methods directly without generating separate tables.
5270 EXCEPTION_MARK;
5271 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
5272
5273 // return value
5274 JavaValue result(T_BOOLEAN);
5275 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5276 JavaCallArguments args;
5277 args.push_int(unicode_ch);
5278
5279 // public static boolean isJavaIdentifierStart(char ch);
5280 JavaCalls::call_static(&result,
5281 klass,
5282 vmSymbols::isJavaIdentifierStart_name(),
5283 vmSymbols::int_bool_signature(),
5284 &args,
5285 THREAD);
5286
5287 if (HAS_PENDING_EXCEPTION) {
5288 CLEAR_PENDING_EXCEPTION;
5289 return 0;
5290 }
5291 if (result.get_jboolean()) {
5292 continue;
5293 }
5294
5295 if (not_first_ch) {
5296 // public static boolean isJavaIdentifierPart(char ch);
5297 JavaCalls::call_static(&result,
5298 klass,
5299 vmSymbols::isJavaIdentifierPart_name(),
5300 vmSymbols::int_bool_signature(),
5301 &args,
5302 THREAD);
5303
5304 if (HAS_PENDING_EXCEPTION) {
5305 CLEAR_PENDING_EXCEPTION;
5306 return 0;
5307 }
5308
5309 if (result.get_jboolean()) {
5310 continue;
5311 }
5312 }
5313 }
5314 return (not_first_ch) ? old_p : NULL;
5315 }
5316 return (not_first_ch) ? p : NULL;
5317 }
5318
5319
5320 // Take pointer to a string. Skip over the longest part of the string that could
5321 // be taken as a field signature. Allow "void" if void_ok.
5322 // Return a pointer to just past the signature.
5323 // Return NULL if no legal signature is found.
5324 char* ClassFileParser::skip_over_field_signature(char* signature,
5325 bool void_ok,
5326 unsigned int length,
5327 TRAPS) {
5328 unsigned int array_dim = 0;
5329 while (length > 0) {
5330 switch (signature[0]) {
5331 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5332 case JVM_SIGNATURE_BOOLEAN:
5333 case JVM_SIGNATURE_BYTE:
5334 case JVM_SIGNATURE_CHAR:
5335 case JVM_SIGNATURE_SHORT:
5336 case JVM_SIGNATURE_INT:
5337 case JVM_SIGNATURE_FLOAT:
5338 case JVM_SIGNATURE_LONG:
5339 case JVM_SIGNATURE_DOUBLE:
5340 return signature + 1;
5341 case JVM_SIGNATURE_CLASS: {
5342 if (_major_version < JAVA_1_5_VERSION) {
5343 // Skip over the class name if one is there
5344 char* p = skip_over_field_name(signature + 1, true, --length);
5345
5346 // The next character better be a semicolon
5347 if (p && (p - signature) > 1 && p[0] == ';') {
5348 return p + 1;
5349 }
5350 } else {
5351 // 4900761: For class version > 48, any unicode is allowed in class name.
5352 length--;
5353 signature++;
5354 while (length > 0 && signature[0] != ';') {
5355 if (signature[0] == '.') {
5356 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
5357 }
5358 length--;
5359 signature++;
5360 }
5361 if (signature[0] == ';') { return signature + 1; }
5362 }
5363
5364 return NULL;
5365 }
5366 case JVM_SIGNATURE_ARRAY:
5367 array_dim++;
5368 if (array_dim > 255) {
5369 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5370 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5371 }
5372 // The rest of what's there better be a legal signature
5373 signature++;
5374 length--;
5375 void_ok = false;
5376 break;
5377
5378 default:
5379 return NULL;
5380 }
5381 }
5382 return NULL;
5383 }