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