1 /*
2 * Copyright (c) 1997, 2022, 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/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/classLoadInfo.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/fieldLayoutBuilder.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/packageEntry.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/verificationType.hpp"
39 #include "classfile/verifier.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "jvm.h"
43 #include "logging/log.hpp"
44 #include "logging/logStream.hpp"
45 #include "memory/allocation.hpp"
46 #include "memory/metadataFactory.hpp"
47 #include "memory/oopFactory.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "memory/universe.hpp"
50 #include "oops/annotations.hpp"
51 #include "oops/constantPool.inline.hpp"
52 #include "oops/fieldStreams.inline.hpp"
53 #include "oops/inlineKlass.inline.hpp"
54 #include "oops/instanceKlass.inline.hpp"
55 #include "oops/instanceMirrorKlass.hpp"
56 #include "oops/klass.inline.hpp"
57 #include "oops/klassVtable.hpp"
58 #include "oops/metadata.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/oop.inline.hpp"
61 #include "oops/recordComponent.hpp"
62 #include "oops/symbol.hpp"
63 #include "prims/jvmtiExport.hpp"
64 #include "prims/jvmtiThreadState.hpp"
65 #include "runtime/arguments.hpp"
66 #include "runtime/fieldDescriptor.inline.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/os.hpp"
70 #include "runtime/perfData.hpp"
71 #include "runtime/reflection.hpp"
72 #include "runtime/safepointVerifiers.hpp"
73 #include "runtime/signature.hpp"
74 #include "runtime/timer.hpp"
75 #include "services/classLoadingService.hpp"
76 #include "services/threadService.hpp"
77 #include "utilities/align.hpp"
78 #include "utilities/bitMap.inline.hpp"
79 #include "utilities/copy.hpp"
80 #include "utilities/formatBuffer.hpp"
81 #include "utilities/exceptions.hpp"
82 #include "utilities/globalDefinitions.hpp"
83 #include "utilities/growableArray.hpp"
84 #include "utilities/macros.hpp"
85 #include "utilities/ostream.hpp"
86 #include "utilities/resourceHash.hpp"
87 #include "utilities/stringUtils.hpp"
88 #include "utilities/utf8.hpp"
89 #if INCLUDE_CDS
90 #include "classfile/systemDictionaryShared.hpp"
91 #endif
92 #if INCLUDE_JFR
93 #include "jfr/support/jfrTraceIdExtension.hpp"
94 #endif
95
96 // We generally try to create the oops directly when parsing, rather than
97 // allocating temporary data structures and copying the bytes twice. A
98 // temporary area is only needed when parsing utf8 entries in the constant
99 // pool and when parsing line number tables.
100
101 // We add assert in debug mode when class format is not checked.
102
103 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
104 #define JAVA_MIN_SUPPORTED_VERSION 45
105 #define JAVA_PREVIEW_MINOR_VERSION 65535
106
107 // Used for two backward compatibility reasons:
108 // - to check for new additions to the class file format in JDK1.5
109 // - to check for bug fixes in the format checker in JDK1.5
110 #define JAVA_1_5_VERSION 49
111
112 // Used for backward compatibility reasons:
113 // - to check for javac bug fixes that happened after 1.5
114 // - also used as the max version when running in jdk6
115 #define JAVA_6_VERSION 50
116
117 // Used for backward compatibility reasons:
118 // - to disallow argument and require ACC_STATIC for <clinit> methods
119 #define JAVA_7_VERSION 51
120
121 // Extension method support.
122 #define JAVA_8_VERSION 52
123
124 #define JAVA_9_VERSION 53
125
126 #define JAVA_10_VERSION 54
127
128 #define JAVA_11_VERSION 55
129
130 #define JAVA_12_VERSION 56
131
132 #define JAVA_13_VERSION 57
133
134 #define JAVA_14_VERSION 58
135
136 #define JAVA_15_VERSION 59
137
138 #define JAVA_16_VERSION 60
139
140 #define JAVA_17_VERSION 61
141
142 #define JAVA_18_VERSION 62
143
144 #define JAVA_19_VERSION 63
145
146 #define JAVA_20_VERSION 64
147
148 #define JAVA_21_VERSION 65
149
150 #define CONSTANT_CLASS_DESCRIPTORS 65
151
152 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
153 assert((bad_constant == JVM_CONSTANT_Module ||
154 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
155 "Unexpected bad constant pool entry");
156 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
157 }
158
159 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
160 ConstantPool* cp,
161 const int length,
162 TRAPS) {
163 assert(stream != NULL, "invariant");
164 assert(cp != NULL, "invariant");
165
166 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
167 // this function (_current can be allocated in a register, with scalar
168 // replacement of aggregates). The _current pointer is copied back to
169 // stream() when this function returns. DON'T call another method within
170 // this method that uses stream().
171 const ClassFileStream cfs1 = *stream;
172 const ClassFileStream* const cfs = &cfs1;
173
174 debug_only(const u1* const old_current = stream->current();)
175
176 // Used for batching symbol allocations.
177 const char* names[SymbolTable::symbol_alloc_batch_size];
178 int lengths[SymbolTable::symbol_alloc_batch_size];
179 int indices[SymbolTable::symbol_alloc_batch_size];
180 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
181 int names_count = 0;
182
183 // parsing Index 0 is unused
184 for (int index = 1; index < length; index++) {
185 // Each of the following case guarantees one more byte in the stream
186 // for the following tag or the access_flags following constant pool,
187 // so we don't need bounds-check for reading tag.
188 const u1 tag = cfs->get_u1_fast();
189 switch (tag) {
190 case JVM_CONSTANT_Class: {
191 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
192 const u2 name_index = cfs->get_u2_fast();
193 cp->klass_index_at_put(index, name_index);
194 break;
195 }
196 case JVM_CONSTANT_Fieldref: {
197 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
198 const u2 class_index = cfs->get_u2_fast();
199 const u2 name_and_type_index = cfs->get_u2_fast();
200 cp->field_at_put(index, class_index, name_and_type_index);
201 break;
202 }
203 case JVM_CONSTANT_Methodref: {
204 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
205 const u2 class_index = cfs->get_u2_fast();
206 const u2 name_and_type_index = cfs->get_u2_fast();
207 cp->method_at_put(index, class_index, name_and_type_index);
208 break;
209 }
210 case JVM_CONSTANT_InterfaceMethodref: {
211 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
212 const u2 class_index = cfs->get_u2_fast();
213 const u2 name_and_type_index = cfs->get_u2_fast();
214 cp->interface_method_at_put(index, class_index, name_and_type_index);
215 break;
216 }
217 case JVM_CONSTANT_String : {
218 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
219 const u2 string_index = cfs->get_u2_fast();
220 cp->string_index_at_put(index, string_index);
221 break;
222 }
223 case JVM_CONSTANT_MethodHandle :
224 case JVM_CONSTANT_MethodType: {
225 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
226 classfile_parse_error(
227 "Class file version does not support constant tag %u in class file %s",
228 tag, THREAD);
229 return;
230 }
231 if (tag == JVM_CONSTANT_MethodHandle) {
232 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
233 const u1 ref_kind = cfs->get_u1_fast();
234 const u2 method_index = cfs->get_u2_fast();
235 cp->method_handle_index_at_put(index, ref_kind, method_index);
236 }
237 else if (tag == JVM_CONSTANT_MethodType) {
238 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
239 const u2 signature_index = cfs->get_u2_fast();
240 cp->method_type_index_at_put(index, signature_index);
241 }
242 else {
243 ShouldNotReachHere();
244 }
245 break;
246 }
247 case JVM_CONSTANT_Dynamic : {
248 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
249 classfile_parse_error(
250 "Class file version does not support constant tag %u in class file %s",
251 tag, THREAD);
252 return;
253 }
254 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
255 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
256 const u2 name_and_type_index = cfs->get_u2_fast();
257 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
258 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
259 }
260 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
261 break;
262 }
263 case JVM_CONSTANT_InvokeDynamic : {
264 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
265 classfile_parse_error(
266 "Class file version does not support constant tag %u in class file %s",
267 tag, THREAD);
268 return;
269 }
270 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
271 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
272 const u2 name_and_type_index = cfs->get_u2_fast();
273 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
274 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
275 }
276 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
277 break;
278 }
279 case JVM_CONSTANT_Integer: {
280 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
281 const u4 bytes = cfs->get_u4_fast();
282 cp->int_at_put(index, (jint)bytes);
283 break;
284 }
285 case JVM_CONSTANT_Float: {
286 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
287 const u4 bytes = cfs->get_u4_fast();
288 cp->float_at_put(index, *(jfloat*)&bytes);
289 break;
290 }
291 case JVM_CONSTANT_Long: {
292 // A mangled type might cause you to overrun allocated memory
293 guarantee_property(index + 1 < length,
294 "Invalid constant pool entry %u in class file %s",
295 index,
296 CHECK);
297 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
298 const u8 bytes = cfs->get_u8_fast();
299 cp->long_at_put(index, bytes);
300 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
301 break;
302 }
303 case JVM_CONSTANT_Double: {
304 // A mangled type might cause you to overrun allocated memory
305 guarantee_property(index+1 < length,
306 "Invalid constant pool entry %u in class file %s",
307 index,
308 CHECK);
309 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
310 const u8 bytes = cfs->get_u8_fast();
311 cp->double_at_put(index, *(jdouble*)&bytes);
312 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
313 break;
314 }
315 case JVM_CONSTANT_NameAndType: {
316 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
317 const u2 name_index = cfs->get_u2_fast();
318 const u2 signature_index = cfs->get_u2_fast();
319 cp->name_and_type_at_put(index, name_index, signature_index);
320 break;
321 }
322 case JVM_CONSTANT_Utf8 : {
323 cfs->guarantee_more(2, CHECK); // utf8_length
324 u2 utf8_length = cfs->get_u2_fast();
325 const u1* utf8_buffer = cfs->current();
326 assert(utf8_buffer != NULL, "null utf8 buffer");
327 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
328 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
329 cfs->skip_u1_fast(utf8_length);
330
331 // Before storing the symbol, make sure it's legal
332 if (_need_verify) {
333 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
334 }
335
336 unsigned int hash;
337 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
338 utf8_length,
339 hash);
340 if (result == NULL) {
341 names[names_count] = (const char*)utf8_buffer;
342 lengths[names_count] = utf8_length;
343 indices[names_count] = index;
344 hashValues[names_count++] = hash;
345 if (names_count == SymbolTable::symbol_alloc_batch_size) {
346 SymbolTable::new_symbols(_loader_data,
347 constantPoolHandle(THREAD, cp),
348 names_count,
349 names,
350 lengths,
351 indices,
352 hashValues);
353 names_count = 0;
354 }
355 } else {
356 cp->symbol_at_put(index, result);
357 }
358 break;
359 }
360 case JVM_CONSTANT_Module:
361 case JVM_CONSTANT_Package: {
362 // Record that an error occurred in these two cases but keep parsing so
363 // that ACC_Module can be checked for in the access_flags. Need to
364 // throw NoClassDefFoundError in that case.
365 if (_major_version >= JAVA_9_VERSION) {
366 cfs->guarantee_more(3, CHECK);
367 cfs->get_u2_fast();
368 set_class_bad_constant_seen(tag);
369 break;
370 }
371 }
372 default: {
373 classfile_parse_error("Unknown constant tag %u in class file %s",
374 tag,
375 THREAD);
376 return;
377 }
378 } // end of switch(tag)
379 } // end of for
380
381 // Allocate the remaining symbols
382 if (names_count > 0) {
383 SymbolTable::new_symbols(_loader_data,
384 constantPoolHandle(THREAD, cp),
385 names_count,
386 names,
387 lengths,
388 indices,
389 hashValues);
390 }
391
392 // Copy _current pointer of local copy back to stream.
393 assert(stream->current() == old_current, "non-exclusive use of stream");
394 stream->set_current(cfs1.current());
395
396 }
397
398 static inline bool valid_cp_range(int index, int length) {
399 return (index > 0 && index < length);
400 }
401
402 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
403 assert(cp != NULL, "invariant");
404 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
405 return cp->symbol_at(index);
406 }
407 return NULL;
408 }
409
410 #ifdef ASSERT
411 PRAGMA_DIAG_PUSH
412 PRAGMA_FORMAT_NONLITERAL_IGNORED
413 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
414 ResourceMark rm(THREAD);
415 fatal(msg, _class_name->as_C_string());
416 }
417
418 void ClassFileParser::report_assert_property_failure(const char* msg,
419 int index,
420 TRAPS) const {
421 ResourceMark rm(THREAD);
422 fatal(msg, index, _class_name->as_C_string());
423 }
424 PRAGMA_DIAG_POP
425 #endif
426
427 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
428 ConstantPool* const cp,
429 const int length,
430 TRAPS) {
431 assert(cp != NULL, "invariant");
432 assert(stream != NULL, "invariant");
433
434 // parsing constant pool entries
435 parse_constant_pool_entries(stream, cp, length, CHECK);
436 if (class_bad_constant_seen() != 0) {
437 // a bad CP entry has been detected previously so stop parsing and just return.
438 return;
439 }
440
441 int index = 1; // declared outside of loops for portability
442 int num_klasses = 0;
443
444 // first verification pass - validate cross references
445 // and fixup class and string constants
446 for (index = 1; index < length; index++) { // Index 0 is unused
447 const jbyte tag = cp->tag_at(index).value();
448 switch (tag) {
449 case JVM_CONSTANT_Class: {
450 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
451 break;
452 }
453 case JVM_CONSTANT_Fieldref:
454 // fall through
455 case JVM_CONSTANT_Methodref:
456 // fall through
457 case JVM_CONSTANT_InterfaceMethodref: {
458 if (!_need_verify) break;
459 const int klass_ref_index = cp->klass_ref_index_at(index);
460 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
461 check_property(valid_klass_reference_at(klass_ref_index),
462 "Invalid constant pool index %u in class file %s",
463 klass_ref_index, CHECK);
464 check_property(valid_cp_range(name_and_type_ref_index, length) &&
465 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
466 "Invalid constant pool index %u in class file %s",
467 name_and_type_ref_index, CHECK);
468 break;
469 }
470 case JVM_CONSTANT_String: {
471 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
472 break;
473 }
474 case JVM_CONSTANT_Integer:
475 break;
476 case JVM_CONSTANT_Float:
477 break;
478 case JVM_CONSTANT_Long:
479 case JVM_CONSTANT_Double: {
480 index++;
481 check_property(
482 (index < length && cp->tag_at(index).is_invalid()),
483 "Improper constant pool long/double index %u in class file %s",
484 index, CHECK);
485 break;
486 }
487 case JVM_CONSTANT_NameAndType: {
488 if (!_need_verify) break;
489 const int name_ref_index = cp->name_ref_index_at(index);
490 const int signature_ref_index = cp->signature_ref_index_at(index);
491 check_property(valid_symbol_at(name_ref_index),
492 "Invalid constant pool index %u in class file %s",
493 name_ref_index, CHECK);
494 check_property(valid_symbol_at(signature_ref_index),
495 "Invalid constant pool index %u in class file %s",
496 signature_ref_index, CHECK);
497 break;
498 }
499 case JVM_CONSTANT_Utf8:
500 break;
501 case JVM_CONSTANT_UnresolvedClass: // fall-through
502 case JVM_CONSTANT_UnresolvedClassInError: {
503 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
504 break;
505 }
506 case JVM_CONSTANT_ClassIndex: {
507 const int class_index = cp->klass_index_at(index);
508 check_property(valid_symbol_at(class_index),
509 "Invalid constant pool index %u in class file %s",
510 class_index, CHECK);
511
512 Symbol* const name = cp->symbol_at(class_index);
513 const unsigned int name_len = name->utf8_length();
514 if (name->is_Q_signature()) {
515 cp->unresolved_qdescriptor_at_put(index, class_index, num_klasses++);
516 } else {
517 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
518 }
519 break;
520 }
521 case JVM_CONSTANT_StringIndex: {
522 const int string_index = cp->string_index_at(index);
523 check_property(valid_symbol_at(string_index),
524 "Invalid constant pool index %u in class file %s",
525 string_index, CHECK);
526 Symbol* const sym = cp->symbol_at(string_index);
527 cp->unresolved_string_at_put(index, sym);
528 break;
529 }
530 case JVM_CONSTANT_MethodHandle: {
531 const int ref_index = cp->method_handle_index_at(index);
532 check_property(valid_cp_range(ref_index, length),
533 "Invalid constant pool index %u in class file %s",
534 ref_index, CHECK);
535 const constantTag tag = cp->tag_at(ref_index);
536 const int ref_kind = cp->method_handle_ref_kind_at(index);
537
538 switch (ref_kind) {
539 case JVM_REF_getField:
540 case JVM_REF_getStatic:
541 case JVM_REF_putField:
542 case JVM_REF_putStatic: {
543 check_property(
544 tag.is_field(),
545 "Invalid constant pool index %u in class file %s (not a field)",
546 ref_index, CHECK);
547 break;
548 }
549 case JVM_REF_invokeVirtual:
550 case JVM_REF_newInvokeSpecial: {
551 check_property(
552 tag.is_method(),
553 "Invalid constant pool index %u in class file %s (not a method)",
554 ref_index, CHECK);
555 break;
556 }
557 case JVM_REF_invokeStatic:
558 case JVM_REF_invokeSpecial: {
559 check_property(
560 tag.is_method() ||
561 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
562 "Invalid constant pool index %u in class file %s (not a method)",
563 ref_index, CHECK);
564 break;
565 }
566 case JVM_REF_invokeInterface: {
567 check_property(
568 tag.is_interface_method(),
569 "Invalid constant pool index %u in class file %s (not an interface method)",
570 ref_index, CHECK);
571 break;
572 }
573 default: {
574 classfile_parse_error(
575 "Bad method handle kind at constant pool index %u in class file %s",
576 index, THREAD);
577 return;
578 }
579 } // switch(refkind)
580 // Keep the ref_index unchanged. It will be indirected at link-time.
581 break;
582 } // case MethodHandle
583 case JVM_CONSTANT_MethodType: {
584 const int ref_index = cp->method_type_index_at(index);
585 check_property(valid_symbol_at(ref_index),
586 "Invalid constant pool index %u in class file %s",
587 ref_index, CHECK);
588 break;
589 }
590 case JVM_CONSTANT_Dynamic: {
591 const int name_and_type_ref_index =
592 cp->bootstrap_name_and_type_ref_index_at(index);
593
594 check_property(valid_cp_range(name_and_type_ref_index, length) &&
595 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
596 "Invalid constant pool index %u in class file %s",
597 name_and_type_ref_index, CHECK);
598 // bootstrap specifier index must be checked later,
599 // when BootstrapMethods attr is available
600
601 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
602 cp->set_has_dynamic_constant();
603 break;
604 }
605 case JVM_CONSTANT_InvokeDynamic: {
606 const int name_and_type_ref_index =
607 cp->bootstrap_name_and_type_ref_index_at(index);
608
609 check_property(valid_cp_range(name_and_type_ref_index, length) &&
610 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
611 "Invalid constant pool index %u in class file %s",
612 name_and_type_ref_index, CHECK);
613 // bootstrap specifier index must be checked later,
614 // when BootstrapMethods attr is available
615 break;
616 }
617 default: {
618 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
619 ShouldNotReachHere();
620 break;
621 }
622 } // switch(tag)
623 } // end of for
624
625 cp->allocate_resolved_klasses(_loader_data, num_klasses, CHECK);
626
627 if (!_need_verify) {
628 return;
629 }
630
631 // second verification pass - checks the strings are of the right format.
632 // but not yet to the other entries
633 for (index = 1; index < length; index++) {
634 const jbyte tag = cp->tag_at(index).value();
635 switch (tag) {
636 case JVM_CONSTANT_UnresolvedClass: {
637 const Symbol* const class_name = cp->klass_name_at(index);
638 // check the name
639 verify_legal_class_name(class_name, CHECK);
640 break;
641 }
642 case JVM_CONSTANT_NameAndType: {
643 if (_need_verify) {
644 const int sig_index = cp->signature_ref_index_at(index);
645 const int name_index = cp->name_ref_index_at(index);
646 const Symbol* const name = cp->symbol_at(name_index);
647 const Symbol* const sig = cp->symbol_at(sig_index);
648 guarantee_property(sig->utf8_length() != 0,
649 "Illegal zero length constant pool entry at %d in class %s",
650 sig_index, CHECK);
651 guarantee_property(name->utf8_length() != 0,
652 "Illegal zero length constant pool entry at %d in class %s",
653 name_index, CHECK);
654
655 if (Signature::is_method(sig)) {
656 // Format check method name and signature
657 verify_legal_method_name(name, CHECK);
658 verify_legal_method_signature(name, sig, CHECK);
659 } else {
660 // Format check field name and signature
661 verify_legal_field_name(name, CHECK);
662 verify_legal_field_signature(name, sig, CHECK);
663 }
664 }
665 break;
666 }
667 case JVM_CONSTANT_Dynamic: {
668 const int name_and_type_ref_index =
669 cp->name_and_type_ref_index_at(index);
670 // already verified to be utf8
671 const int name_ref_index =
672 cp->name_ref_index_at(name_and_type_ref_index);
673 // already verified to be utf8
674 const int signature_ref_index =
675 cp->signature_ref_index_at(name_and_type_ref_index);
676 const Symbol* const name = cp->symbol_at(name_ref_index);
677 const Symbol* const signature = cp->symbol_at(signature_ref_index);
678 if (_need_verify) {
679 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
680 // Need only to be sure signature is the right type.
681 if (Signature::is_method(signature)) {
682 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
683 }
684 }
685 break;
686 }
687 case JVM_CONSTANT_InvokeDynamic:
688 case JVM_CONSTANT_Fieldref:
689 case JVM_CONSTANT_Methodref:
690 case JVM_CONSTANT_InterfaceMethodref: {
691 const int name_and_type_ref_index =
692 cp->name_and_type_ref_index_at(index);
693 // already verified to be utf8
694 const int name_ref_index =
695 cp->name_ref_index_at(name_and_type_ref_index);
696 // already verified to be utf8
697 const int signature_ref_index =
698 cp->signature_ref_index_at(name_and_type_ref_index);
699 const Symbol* const name = cp->symbol_at(name_ref_index);
700 const Symbol* const signature = cp->symbol_at(signature_ref_index);
701 if (tag == JVM_CONSTANT_Fieldref) {
702 if (_need_verify) {
703 // Field name and signature are verified above, when iterating NameAndType_info.
704 // Need only to be sure signature is non-zero length and the right type.
705 if (Signature::is_method(signature)) {
706 throwIllegalSignature("Field", name, signature, CHECK);
707 }
708 }
709 } else {
710 if (_need_verify) {
711 // Method name and signature are individually verified above, when iterating
712 // NameAndType_info. Need to check here that signature is non-zero length and
713 // the right type.
714 if (!Signature::is_method(signature)) {
715 throwIllegalSignature("Method", name, signature, CHECK);
716 }
717 }
718 // If a class method name begins with '<', it must be "<init>" and have void signature,
719 // or if it is an inline type, <vnew> with return.
720 const unsigned int name_len = name->utf8_length();
721 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
722 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
723 if (name != vmSymbols::object_initializer_name() &&
724 name != vmSymbols::inline_factory_name()) {
725 classfile_parse_error(
726 "Bad method name at constant pool index %u in class file %s",
727 name_ref_index, THREAD);
728 return;
729 } else if (!Signature::is_void_method(signature)) {
730 // if return type is non-void then it must be an inline type
731 if (name == vmSymbols::object_initializer_name() ||
732 !EnableValhalla || !supports_inline_types() ||
733 !signature->ends_with(JVM_SIGNATURE_ENDCLASS)) {
734 throwIllegalSignature("Method", name, signature, CHECK);
735 }
736 }
737 }
738 }
739 break;
740 }
741 case JVM_CONSTANT_MethodHandle: {
742 const int ref_index = cp->method_handle_index_at(index);
743 const int ref_kind = cp->method_handle_ref_kind_at(index);
744 switch (ref_kind) {
745 case JVM_REF_invokeVirtual:
746 case JVM_REF_invokeStatic:
747 case JVM_REF_invokeSpecial:
748 case JVM_REF_newInvokeSpecial: {
749 const int name_and_type_ref_index =
750 cp->name_and_type_ref_index_at(ref_index);
751 const int name_ref_index =
752 cp->name_ref_index_at(name_and_type_ref_index);
753 const Symbol* const name = cp->symbol_at(name_ref_index);
754
755 if (EnableValhalla && supports_inline_types() && name == vmSymbols::inline_factory_name()) { // <vnew>
756 // <vnew> factory methods must be non-void return and invokeStatic.
757 const int signature_ref_index =
758 cp->signature_ref_index_at(name_and_type_ref_index);
759 const Symbol* const signature = cp->symbol_at(signature_ref_index);
760 if (signature->is_void_method_signature() || ref_kind != JVM_REF_invokeStatic) {
761 classfile_parse_error(
762 "Bad factory method name at constant pool index %u in class file %s",
763 name_ref_index, CHECK);
764 }
765 } else if (name != vmSymbols::object_initializer_name()) { // !<init>
766 if (ref_kind == JVM_REF_newInvokeSpecial) {
767 classfile_parse_error(
768 "Bad constructor name at constant pool index %u in class file %s",
769 name_ref_index, THREAD);
770 return;
771 }
772 } else { // <init>
773 // The allowed invocation mode of <init> depends on its signature.
774 // This test corresponds to verify_invoke_instructions in the verifier.
775 const int signature_ref_index =
776 cp->signature_ref_index_at(name_and_type_ref_index);
777 const Symbol* const signature = cp->symbol_at(signature_ref_index);
778 if (signature->is_void_method_signature()
779 && ref_kind == JVM_REF_newInvokeSpecial) {
780 // OK, could be a constructor call
781 } else {
782 classfile_parse_error(
783 "Bad method name at constant pool index %u in class file %s",
784 name_ref_index, THREAD);
785 return;
786 }
787 }
788 break;
789 }
790 // Other ref_kinds are already fully checked in previous pass.
791 } // switch(ref_kind)
792 break;
793 }
794 case JVM_CONSTANT_MethodType: {
795 const Symbol* const no_name = vmSymbols::type_name(); // place holder
796 const Symbol* const signature = cp->method_type_signature_at(index);
797 verify_legal_method_signature(no_name, signature, CHECK);
798 break;
799 }
800 case JVM_CONSTANT_Utf8: {
801 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
802 }
803 } // switch(tag)
804 } // end of for
805 }
806
807 class NameSigHash: public ResourceObj {
808 public:
809 const Symbol* _name; // name
810 const Symbol* _sig; // signature
811 NameSigHash* _next; // Next entry in hash table
812 };
813
814 static const int HASH_ROW_SIZE = 256;
815
816 static unsigned int hash(const Symbol* name, const Symbol* sig) {
817 unsigned int raw_hash = 0;
818 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
819 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
820
821 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
822 }
823
824
825 static void initialize_hashtable(NameSigHash** table) {
826 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
827 }
828 // Return false if the name/sig combination is found in table.
829 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
830 // The old format checker uses heap sort to find duplicates.
831 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
832 // of table since we don't expect Symbol*'s to move.
833 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
834 assert(name != NULL, "name in constant pool is NULL");
835
836 // First lookup for duplicates
837 int index = hash(name, sig);
838 NameSigHash* entry = table[index];
839 while (entry != NULL) {
840 if (entry->_name == name && entry->_sig == sig) {
841 return false;
842 }
843 entry = entry->_next;
844 }
845
846 // No duplicate is found, allocate a new entry and fill it.
847 entry = new NameSigHash();
848 entry->_name = name;
849 entry->_sig = sig;
850
851 // Insert into hash table
852 entry->_next = table[index];
853 table[index] = entry;
854
855 return true;
856 }
857
858 static void check_identity_and_value_modifiers(ClassFileParser* current, const InstanceKlass* super_type, TRAPS) {
859 assert(super_type != NULL,"Method doesn't support null super type");
860 if (super_type->carries_identity_modifier()) {
861 if (current->carries_value_modifier()) {
862 ResourceMark rm(THREAD);
863 Exceptions::fthrow(
864 THREAD_AND_LOCATION,
865 vmSymbols::java_lang_IncompatibleClassChangeError(),
866 "Value type %s has an identity type as supertype",
867 current->class_name()->as_klass_external_name());
868 return;
869 }
870 current->set_carries_identity_modifier();
871 }
872 if (super_type->carries_value_modifier()) {
873 if (current->carries_identity_modifier()) {
874 ResourceMark rm(THREAD);
875 Exceptions::fthrow(
876 THREAD_AND_LOCATION,
877 vmSymbols::java_lang_IncompatibleClassChangeError(),
878 "Identity type %s has a value type as supertype",
879 current->class_name()->as_klass_external_name());
880 return;
881 }
882 current->set_carries_value_modifier();
883 }
884 }
885
886 void ClassFileParser::parse_interfaces(const ClassFileStream* stream,
887 int itfs_len,
888 ConstantPool* cp,
889 bool* const has_nonstatic_concrete_methods,
890 // FIXME: lots of these functions
891 // declare their parameters as const,
892 // which adds only noise to the code.
893 // Remove the spurious const modifiers.
894 // Many are of the form "const int x"
895 // or "T* const x".
896 bool* const is_declared_atomic,
897 TRAPS) {
898 assert(stream != NULL, "invariant");
899 assert(cp != NULL, "invariant");
900 assert(has_nonstatic_concrete_methods != NULL, "invariant");
901
902 if (itfs_len == 0) {
903 _local_interfaces = Universe::the_empty_instance_klass_array();
904
905 } else {
906 assert(itfs_len > 0, "only called for len>0");
907 _local_interface_indexes = new GrowableArray<u2>(itfs_len);
908 int index = 0;
909 for (index = 0; index < itfs_len; index++) {
910 const u2 interface_index = stream->get_u2(CHECK);
911 check_property(
912 valid_klass_reference_at(interface_index),
913 "Interface name has bad constant pool index %u in class file %s",
914 interface_index, CHECK);
915 _local_interface_indexes->at_put_grow(index, interface_index);
916 }
917
918 if (!_need_verify || itfs_len <= 1) {
919 return;
920 }
921
922 // Check if there's any duplicates in interfaces
923 ResourceMark rm(THREAD);
924 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
925 NameSigHash*,
926 HASH_ROW_SIZE);
927 initialize_hashtable(interface_names);
928 bool dup = false;
929 const Symbol* name = NULL;
930 {
931 debug_only(NoSafepointVerifier nsv;)
932 for (index = 0; index < itfs_len; index++) {
933 name = cp->klass_name_at(_local_interface_indexes->at(index));
934 // If no duplicates, add (name, NULL) in hashtable interface_names.
935 if (!put_after_lookup(name, NULL, interface_names)) {
936 dup = true;
937 break;
938 }
939 }
940 }
941 if (dup) {
942 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
943 name->as_C_string(), THREAD);
944 }
945 }
946 }
947
948 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
949 int constantvalue_index,
950 int signature_index,
951 TRAPS) const {
952 // Make sure the constant pool entry is of a type appropriate to this field
953 guarantee_property(
954 (constantvalue_index > 0 &&
955 constantvalue_index < cp->length()),
956 "Bad initial value index %u in ConstantValue attribute in class file %s",
957 constantvalue_index, CHECK);
958
959 const constantTag value_type = cp->tag_at(constantvalue_index);
960 switch(cp->basic_type_for_signature_at(signature_index)) {
961 case T_LONG: {
962 guarantee_property(value_type.is_long(),
963 "Inconsistent constant value type in class file %s",
964 CHECK);
965 break;
966 }
967 case T_FLOAT: {
968 guarantee_property(value_type.is_float(),
969 "Inconsistent constant value type in class file %s",
970 CHECK);
971 break;
972 }
973 case T_DOUBLE: {
974 guarantee_property(value_type.is_double(),
975 "Inconsistent constant value type in class file %s",
976 CHECK);
977 break;
978 }
979 case T_BYTE:
980 case T_CHAR:
981 case T_SHORT:
982 case T_BOOLEAN:
983 case T_INT: {
984 guarantee_property(value_type.is_int(),
985 "Inconsistent constant value type in class file %s",
986 CHECK);
987 break;
988 }
989 case T_OBJECT: {
990 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
991 && value_type.is_string()),
992 "Bad string initial value in class file %s",
993 CHECK);
994 break;
995 }
996 default: {
997 classfile_parse_error("Unable to set initial value %u in class file %s",
998 constantvalue_index,
999 THREAD);
1000 }
1001 }
1002 }
1003
1004 class AnnotationCollector : public ResourceObj{
1005 public:
1006 enum Location { _in_field, _in_method, _in_class };
1007 enum ID {
1008 _unknown = 0,
1009 _method_CallerSensitive,
1010 _method_ForceInline,
1011 _method_DontInline,
1012 _method_ChangesCurrentThread,
1013 _method_JvmtiMountTransition,
1014 _method_InjectedProfile,
1015 _method_LambdaForm_Compiled,
1016 _method_Hidden,
1017 _method_Scoped,
1018 _method_IntrinsicCandidate,
1019 _jdk_internal_vm_annotation_Contended,
1020 _field_Stable,
1021 _jdk_internal_vm_annotation_ReservedStackAccess,
1022 _jdk_internal_ValueBased,
1023 _annotation_LIMIT
1024 };
1025 const Location _location;
1026 int _annotations_present;
1027 u2 _contended_group;
1028
1029 AnnotationCollector(Location location)
1030 : _location(location), _annotations_present(0), _contended_group(0)
1031 {
1032 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1033 }
1034 // If this annotation name has an ID, report it (or _none).
1035 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
1036 // Set the annotation name:
1037 void set_annotation(ID id) {
1038 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1039 _annotations_present |= nth_bit((int)id);
1040 }
1041
1042 void remove_annotation(ID id) {
1043 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1044 _annotations_present &= ~nth_bit((int)id);
1045 }
1046
1047 // Report if the annotation is present.
1048 bool has_any_annotations() const { return _annotations_present != 0; }
1049 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1050
1051 void set_contended_group(u2 group) { _contended_group = group; }
1052 u2 contended_group() const { return _contended_group; }
1053
1054 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1055
1056 void set_stable(bool stable) { set_annotation(_field_Stable); }
1057 bool is_stable() const { return has_annotation(_field_Stable); }
1058 };
1059
1060 // This class also doubles as a holder for metadata cleanup.
1061 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1062 private:
1063 ClassLoaderData* _loader_data;
1064 AnnotationArray* _field_annotations;
1065 AnnotationArray* _field_type_annotations;
1066 public:
1067 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1068 AnnotationCollector(_in_field),
1069 _loader_data(loader_data),
1070 _field_annotations(NULL),
1071 _field_type_annotations(NULL) {}
1072 ~FieldAnnotationCollector();
1073 void apply_to(FieldInfo* f);
1074 AnnotationArray* field_annotations() { return _field_annotations; }
1075 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1076
1077 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1078 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1079 };
1080
1081 class MethodAnnotationCollector : public AnnotationCollector{
1082 public:
1083 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1084 void apply_to(const methodHandle& m);
1085 };
1086
1087 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1088 public:
1089 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1090 void apply_to(InstanceKlass* ik);
1091 };
1092
1093
1094 static int skip_annotation_value(const u1*, int, int); // fwd decl
1095
1096 // Safely increment index by val if does not pass limit
1097 #define SAFE_ADD(index, limit, val) \
1098 if (index >= limit - val) return limit; \
1099 index += val;
1100
1101 // Skip an annotation. Return >=limit if there is any problem.
1102 static int skip_annotation(const u1* buffer, int limit, int index) {
1103 assert(buffer != NULL, "invariant");
1104 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1105 // value := switch (tag:u1) { ... }
1106 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1107 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1108 while (--nmem >= 0 && index < limit) {
1109 SAFE_ADD(index, limit, 2); // skip member
1110 index = skip_annotation_value(buffer, limit, index);
1111 }
1112 return index;
1113 }
1114
1115 // Skip an annotation value. Return >=limit if there is any problem.
1116 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1117 assert(buffer != NULL, "invariant");
1118
1119 // value := switch (tag:u1) {
1120 // case B, C, I, S, Z, D, F, J, c: con:u2;
1121 // case e: e_class:u2 e_name:u2;
1122 // case s: s_con:u2;
1123 // case [: do(nval:u2) {value};
1124 // case @: annotation;
1125 // case s: s_con:u2;
1126 // }
1127 SAFE_ADD(index, limit, 1); // read tag
1128 const u1 tag = buffer[index - 1];
1129 switch (tag) {
1130 case 'B':
1131 case 'C':
1132 case 'I':
1133 case 'S':
1134 case 'Z':
1135 case 'D':
1136 case 'F':
1137 case 'J':
1138 case 'c':
1139 case 's':
1140 SAFE_ADD(index, limit, 2); // skip con or s_con
1141 break;
1142 case 'e':
1143 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1144 break;
1145 case '[':
1146 {
1147 SAFE_ADD(index, limit, 2); // read nval
1148 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1149 while (--nval >= 0 && index < limit) {
1150 index = skip_annotation_value(buffer, limit, index);
1151 }
1152 }
1153 break;
1154 case '@':
1155 index = skip_annotation(buffer, limit, index);
1156 break;
1157 default:
1158 return limit; // bad tag byte
1159 }
1160 return index;
1161 }
1162
1163 // Sift through annotations, looking for those significant to the VM:
1164 static void parse_annotations(const ConstantPool* const cp,
1165 const u1* buffer, int limit,
1166 AnnotationCollector* coll,
1167 ClassLoaderData* loader_data,
1168 const bool can_access_vm_annotations) {
1169
1170 assert(cp != NULL, "invariant");
1171 assert(buffer != NULL, "invariant");
1172 assert(coll != NULL, "invariant");
1173 assert(loader_data != NULL, "invariant");
1174
1175 // annotations := do(nann:u2) {annotation}
1176 int index = 2; // read nann
1177 if (index >= limit) return;
1178 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1179 enum { // initial annotation layout
1180 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1181 count_off = 2, // u2 such as 1 (one value)
1182 member_off = 4, // utf8 such as 'value'
1183 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1184 e_tag_val = 'e',
1185 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1186 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1187 e_size = 11, // end of 'e' annotation
1188 c_tag_val = 'c', // payload is type
1189 c_con_off = 7, // utf8 payload, such as 'I'
1190 c_size = 9, // end of 'c' annotation
1191 s_tag_val = 's', // payload is String
1192 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1193 s_size = 9,
1194 min_size = 6 // smallest possible size (zero members)
1195 };
1196 // Cannot add min_size to index in case of overflow MAX_INT
1197 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1198 int index0 = index;
1199 index = skip_annotation(buffer, limit, index);
1200 const u1* const abase = buffer + index0;
1201 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1202 const int count = Bytes::get_Java_u2((address)abase + count_off);
1203 const Symbol* const aname = check_symbol_at(cp, atype);
1204 if (aname == NULL) break; // invalid annotation name
1205 const Symbol* member = NULL;
1206 if (count >= 1) {
1207 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1208 member = check_symbol_at(cp, member_index);
1209 if (member == NULL) break; // invalid member name
1210 }
1211
1212 // Here is where parsing particular annotations will take place.
1213 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1214 if (AnnotationCollector::_unknown == id) continue;
1215 coll->set_annotation(id);
1216
1217 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1218 // @Contended can optionally specify the contention group.
1219 //
1220 // Contended group defines the equivalence class over the fields:
1221 // the fields within the same contended group are not treated distinct.
1222 // The only exception is default group, which does not incur the
1223 // equivalence. Naturally, contention group for classes is meaningless.
1224 //
1225 // While the contention group is specified as String, annotation
1226 // values are already interned, and we might as well use the constant
1227 // pool index as the group tag.
1228 //
1229 u2 group_index = 0; // default contended group
1230 if (count == 1
1231 && s_size == (index - index0) // match size
1232 && s_tag_val == *(abase + tag_off)
1233 && member == vmSymbols::value_name()) {
1234 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1235 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1236 group_index = 0; // default contended group
1237 }
1238 }
1239 coll->set_contended_group(group_index);
1240 }
1241 }
1242 }
1243
1244
1245 // Parse attributes for a field.
1246 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1247 u2 attributes_count,
1248 bool is_static, u2 signature_index,
1249 u2* const constantvalue_index_addr,
1250 bool* const is_synthetic_addr,
1251 u2* const generic_signature_index_addr,
1252 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1253 TRAPS) {
1254 assert(cfs != NULL, "invariant");
1255 assert(constantvalue_index_addr != NULL, "invariant");
1256 assert(is_synthetic_addr != NULL, "invariant");
1257 assert(generic_signature_index_addr != NULL, "invariant");
1258 assert(parsed_annotations != NULL, "invariant");
1259 assert(attributes_count > 0, "attributes_count should be greater than 0");
1260
1261 u2 constantvalue_index = 0;
1262 u2 generic_signature_index = 0;
1263 bool is_synthetic = false;
1264 const u1* runtime_visible_annotations = NULL;
1265 int runtime_visible_annotations_length = 0;
1266 const u1* runtime_invisible_annotations = NULL;
1267 int runtime_invisible_annotations_length = 0;
1268 const u1* runtime_visible_type_annotations = NULL;
1269 int runtime_visible_type_annotations_length = 0;
1270 const u1* runtime_invisible_type_annotations = NULL;
1271 int runtime_invisible_type_annotations_length = 0;
1272 bool runtime_invisible_annotations_exists = false;
1273 bool runtime_invisible_type_annotations_exists = false;
1274 const ConstantPool* const cp = _cp;
1275
1276 while (attributes_count--) {
1277 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1278 const u2 attribute_name_index = cfs->get_u2_fast();
1279 const u4 attribute_length = cfs->get_u4_fast();
1280 check_property(valid_symbol_at(attribute_name_index),
1281 "Invalid field attribute index %u in class file %s",
1282 attribute_name_index,
1283 CHECK);
1284
1285 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1286 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1287 // ignore if non-static
1288 if (constantvalue_index != 0) {
1289 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1290 return;
1291 }
1292 check_property(
1293 attribute_length == 2,
1294 "Invalid ConstantValue field attribute length %u in class file %s",
1295 attribute_length, CHECK);
1296
1297 constantvalue_index = cfs->get_u2(CHECK);
1298 if (_need_verify) {
1299 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1300 }
1301 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1302 if (attribute_length != 0) {
1303 classfile_parse_error(
1304 "Invalid Synthetic field attribute length %u in class file %s",
1305 attribute_length, THREAD);
1306 return;
1307 }
1308 is_synthetic = true;
1309 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1310 if (attribute_length != 0) {
1311 classfile_parse_error(
1312 "Invalid Deprecated field attribute length %u in class file %s",
1313 attribute_length, THREAD);
1314 return;
1315 }
1316 } else if (_major_version >= JAVA_1_5_VERSION) {
1317 if (attribute_name == vmSymbols::tag_signature()) {
1318 if (generic_signature_index != 0) {
1319 classfile_parse_error(
1320 "Multiple Signature attributes for field in class file %s", THREAD);
1321 return;
1322 }
1323 if (attribute_length != 2) {
1324 classfile_parse_error(
1325 "Wrong size %u for field's Signature attribute in class file %s",
1326 attribute_length, THREAD);
1327 return;
1328 }
1329 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1330 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1331 if (runtime_visible_annotations != NULL) {
1332 classfile_parse_error(
1333 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1334 return;
1335 }
1336 runtime_visible_annotations_length = attribute_length;
1337 runtime_visible_annotations = cfs->current();
1338 assert(runtime_visible_annotations != NULL, "null visible annotations");
1339 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1340 parse_annotations(cp,
1341 runtime_visible_annotations,
1342 runtime_visible_annotations_length,
1343 parsed_annotations,
1344 _loader_data,
1345 _can_access_vm_annotations);
1346 cfs->skip_u1_fast(runtime_visible_annotations_length);
1347 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1348 if (runtime_invisible_annotations_exists) {
1349 classfile_parse_error(
1350 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1351 return;
1352 }
1353 runtime_invisible_annotations_exists = true;
1354 if (PreserveAllAnnotations) {
1355 runtime_invisible_annotations_length = attribute_length;
1356 runtime_invisible_annotations = cfs->current();
1357 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1358 }
1359 cfs->skip_u1(attribute_length, CHECK);
1360 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1361 if (runtime_visible_type_annotations != NULL) {
1362 classfile_parse_error(
1363 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1364 return;
1365 }
1366 runtime_visible_type_annotations_length = attribute_length;
1367 runtime_visible_type_annotations = cfs->current();
1368 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1369 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1370 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1371 if (runtime_invisible_type_annotations_exists) {
1372 classfile_parse_error(
1373 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1374 return;
1375 } else {
1376 runtime_invisible_type_annotations_exists = true;
1377 }
1378 if (PreserveAllAnnotations) {
1379 runtime_invisible_type_annotations_length = attribute_length;
1380 runtime_invisible_type_annotations = cfs->current();
1381 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1382 }
1383 cfs->skip_u1(attribute_length, CHECK);
1384 } else {
1385 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1386 }
1387 } else {
1388 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1389 }
1390 }
1391
1392 *constantvalue_index_addr = constantvalue_index;
1393 *is_synthetic_addr = is_synthetic;
1394 *generic_signature_index_addr = generic_signature_index;
1395 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1396 runtime_visible_annotations_length,
1397 runtime_invisible_annotations,
1398 runtime_invisible_annotations_length,
1399 CHECK);
1400 parsed_annotations->set_field_annotations(a);
1401 a = assemble_annotations(runtime_visible_type_annotations,
1402 runtime_visible_type_annotations_length,
1403 runtime_invisible_type_annotations,
1404 runtime_invisible_type_annotations_length,
1405 CHECK);
1406 parsed_annotations->set_field_type_annotations(a);
1407 return;
1408 }
1409
1410
1411 // Field allocation types. Used for computing field offsets.
1412
1413 enum FieldAllocationType {
1414 STATIC_OOP, // Oops
1415 STATIC_BYTE, // Boolean, Byte, char
1416 STATIC_SHORT, // shorts
1417 STATIC_WORD, // ints
1418 STATIC_DOUBLE, // aligned long or double
1419 STATIC_INLINE, // inline type field
1420 NONSTATIC_OOP,
1421 NONSTATIC_BYTE,
1422 NONSTATIC_SHORT,
1423 NONSTATIC_WORD,
1424 NONSTATIC_DOUBLE,
1425 NONSTATIC_INLINE,
1426 MAX_FIELD_ALLOCATION_TYPE,
1427 BAD_ALLOCATION_TYPE = -1
1428 };
1429
1430 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1431 BAD_ALLOCATION_TYPE, // 0
1432 BAD_ALLOCATION_TYPE, // 1
1433 BAD_ALLOCATION_TYPE, // 2
1434 BAD_ALLOCATION_TYPE, // 3
1435 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1436 NONSTATIC_SHORT, // T_CHAR = 5,
1437 NONSTATIC_WORD, // T_FLOAT = 6,
1438 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1439 NONSTATIC_BYTE, // T_BYTE = 8,
1440 NONSTATIC_SHORT, // T_SHORT = 9,
1441 NONSTATIC_WORD, // T_INT = 10,
1442 NONSTATIC_DOUBLE, // T_LONG = 11,
1443 NONSTATIC_OOP, // T_OBJECT = 12,
1444 NONSTATIC_OOP, // T_ARRAY = 13,
1445 NONSTATIC_OOP, // T_PRIMITIVE_OBJECT = 14,
1446 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1447 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1448 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1449 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1450 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1451 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20,
1452 BAD_ALLOCATION_TYPE, // 0
1453 BAD_ALLOCATION_TYPE, // 1
1454 BAD_ALLOCATION_TYPE, // 2
1455 BAD_ALLOCATION_TYPE, // 3
1456 STATIC_BYTE , // T_BOOLEAN = 4,
1457 STATIC_SHORT, // T_CHAR = 5,
1458 STATIC_WORD, // T_FLOAT = 6,
1459 STATIC_DOUBLE, // T_DOUBLE = 7,
1460 STATIC_BYTE, // T_BYTE = 8,
1461 STATIC_SHORT, // T_SHORT = 9,
1462 STATIC_WORD, // T_INT = 10,
1463 STATIC_DOUBLE, // T_LONG = 11,
1464 STATIC_OOP, // T_OBJECT = 12,
1465 STATIC_OOP, // T_ARRAY = 13,
1466 STATIC_OOP, // T_PRIMITIVE_OBJECT = 14,
1467 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1468 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1469 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1470 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1471 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1472 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20
1473 };
1474
1475 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type, bool is_inline_type) {
1476 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1477 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1478 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1479 if (is_inline_type) {
1480 result = is_static ? STATIC_INLINE : NONSTATIC_INLINE;
1481 }
1482 return result;
1483 }
1484
1485 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1486 public:
1487 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1488
1489 FieldAllocationCount() {
1490 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1491 count[i] = 0;
1492 }
1493 }
1494
1495 void update(bool is_static, BasicType type, bool is_inline_type) {
1496 FieldAllocationType atype = basic_type_to_atype(is_static, type, is_inline_type);
1497 if (atype != BAD_ALLOCATION_TYPE) {
1498 // Make sure there is no overflow with injected fields.
1499 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1500 count[atype]++;
1501 }
1502 }
1503 };
1504
1505 // Side-effects: populates the _fields, _fields_annotations,
1506 // _fields_type_annotations fields
1507 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1508 AccessFlags class_access_flags,
1509 FieldAllocationCount* const fac,
1510 ConstantPool* cp,
1511 const int cp_size,
1512 u2* const java_fields_count_ptr,
1513 TRAPS) {
1514
1515 assert(cfs != NULL, "invariant");
1516 assert(fac != NULL, "invariant");
1517 assert(cp != NULL, "invariant");
1518 assert(java_fields_count_ptr != NULL, "invariant");
1519
1520 assert(NULL == _fields, "invariant");
1521 assert(NULL == _fields_annotations, "invariant");
1522 assert(NULL == _fields_type_annotations, "invariant");
1523
1524 bool is_inline_type = class_access_flags.is_value_class() && !class_access_flags.is_abstract();
1525 cfs->guarantee_more(2, CHECK); // length
1526 const u2 length = cfs->get_u2_fast();
1527 *java_fields_count_ptr = length;
1528
1529 int num_injected = 0;
1530 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1531 &num_injected);
1532
1533 // two more slots are required for inline classes:
1534 // one for the static field with a reference to the pre-allocated default value
1535 // one for the field the JVM injects when detecting an empty inline class
1536 const int total_fields = length + num_injected + (is_inline_type ? 2 : 0);
1537
1538 // The field array starts with tuples of shorts
1539 // [access, name index, sig index, initial value index, byte offset].
1540 // A generic signature slot only exists for field with generic
1541 // signature attribute. And the access flag is set with
1542 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1543 // signature slots are at the end of the field array and after all
1544 // other fields data.
1545 //
1546 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1547 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1548 // ...
1549 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1550 // [generic signature index]
1551 // [generic signature index]
1552 // ...
1553 //
1554 // Allocate a temporary resource array for field data. For each field,
1555 // a slot is reserved in the temporary array for the generic signature
1556 // index. After parsing all fields, the data are copied to a permanent
1557 // array and any unused slots will be discarded.
1558 ResourceMark rm(THREAD);
1559 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1560 u2,
1561 total_fields * (FieldInfo::field_slots + 1));
1562
1563 // The generic signature slots start after all other fields' data.
1564 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1565 int num_generic_signature = 0;
1566 int instance_fields_count = 0;
1567 for (int n = 0; n < length; n++) {
1568 // access_flags, name_index, descriptor_index, attributes_count
1569 cfs->guarantee_more(8, CHECK);
1570
1571 jint recognized_modifiers = JVM_RECOGNIZED_FIELD_MODIFIERS;
1572
1573 const jint flags = cfs->get_u2_fast() & recognized_modifiers;
1574 verify_legal_field_modifiers(flags, class_access_flags, CHECK);
1575 AccessFlags access_flags;
1576 access_flags.set_flags(flags);
1577
1578 const u2 name_index = cfs->get_u2_fast();
1579 check_property(valid_symbol_at(name_index),
1580 "Invalid constant pool index %u for field name in class file %s",
1581 name_index, CHECK);
1582 const Symbol* const name = cp->symbol_at(name_index);
1583 verify_legal_field_name(name, CHECK);
1584
1585 const u2 signature_index = cfs->get_u2_fast();
1586 check_property(valid_symbol_at(signature_index),
1587 "Invalid constant pool index %u for field signature in class file %s",
1588 signature_index, CHECK);
1589 const Symbol* const sig = cp->symbol_at(signature_index);
1590 verify_legal_field_signature(name, sig, CHECK);
1591 if (!access_flags.is_static()) instance_fields_count++;
1592
1593 u2 constantvalue_index = 0;
1594 bool is_synthetic = false;
1595 u2 generic_signature_index = 0;
1596 const bool is_static = access_flags.is_static();
1597 FieldAnnotationCollector parsed_annotations(_loader_data);
1598
1599 const u2 attributes_count = cfs->get_u2_fast();
1600 if (attributes_count > 0) {
1601 parse_field_attributes(cfs,
1602 attributes_count,
1603 is_static,
1604 signature_index,
1605 &constantvalue_index,
1606 &is_synthetic,
1607 &generic_signature_index,
1608 &parsed_annotations,
1609 CHECK);
1610
1611 if (parsed_annotations.field_annotations() != NULL) {
1612 if (_fields_annotations == NULL) {
1613 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1614 _loader_data, length, NULL,
1615 CHECK);
1616 }
1617 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1618 parsed_annotations.set_field_annotations(NULL);
1619 }
1620 if (parsed_annotations.field_type_annotations() != NULL) {
1621 if (_fields_type_annotations == NULL) {
1622 _fields_type_annotations =
1623 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1624 length,
1625 NULL,
1626 CHECK);
1627 }
1628 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1629 parsed_annotations.set_field_type_annotations(NULL);
1630 }
1631
1632 if (is_synthetic) {
1633 access_flags.set_is_synthetic();
1634 }
1635 if (generic_signature_index != 0) {
1636 access_flags.set_field_has_generic_signature();
1637 fa[generic_signature_slot] = generic_signature_index;
1638 generic_signature_slot ++;
1639 num_generic_signature ++;
1640 }
1641 }
1642
1643 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1644 field->initialize(access_flags.as_short(),
1645 name_index,
1646 signature_index,
1647 constantvalue_index);
1648 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1649
1650 // Update FieldAllocationCount for this kind of field
1651 fac->update(is_static, type, type == T_PRIMITIVE_OBJECT);
1652
1653 // After field is initialized with type, we can augment it with aux info
1654 if (parsed_annotations.has_any_annotations()) {
1655 parsed_annotations.apply_to(field);
1656 if (field->is_contended()) {
1657 _has_contended_fields = true;
1658 }
1659 }
1660 }
1661
1662 int index = length;
1663 if (num_injected != 0) {
1664 for (int n = 0; n < num_injected; n++) {
1665 // Check for duplicates
1666 if (injected[n].may_be_java) {
1667 const Symbol* const name = injected[n].name();
1668 const Symbol* const signature = injected[n].signature();
1669 bool duplicate = false;
1670 for (int i = 0; i < length; i++) {
1671 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1672 if (name == cp->symbol_at(f->name_index()) &&
1673 signature == cp->symbol_at(f->signature_index())) {
1674 // Symbol is desclared in Java so skip this one
1675 duplicate = true;
1676 break;
1677 }
1678 }
1679 if (duplicate) {
1680 // These will be removed from the field array at the end
1681 continue;
1682 }
1683 }
1684
1685 // Injected field
1686 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1687 field->initialize((u2)JVM_ACC_FIELD_INTERNAL,
1688 (u2)(injected[n].name_index),
1689 (u2)(injected[n].signature_index),
1690 0);
1691
1692 const BasicType type = Signature::basic_type(injected[n].signature());
1693
1694 // Update FieldAllocationCount for this kind of field
1695 fac->update(false, type, false);
1696 index++;
1697 }
1698 }
1699
1700 if (is_inline_type) {
1701 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1702 field->initialize(JVM_ACC_FIELD_INTERNAL | JVM_ACC_STATIC,
1703 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(default_value_name)),
1704 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(object_signature)),
1705 0);
1706 const BasicType type = Signature::basic_type(vmSymbols::object_signature());
1707 fac->update(true, type, false);
1708 index++;
1709 }
1710
1711 if (is_inline_type && instance_fields_count == 0) {
1712 _is_empty_inline_type = true;
1713 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1714 field->initialize(JVM_ACC_FIELD_INTERNAL,
1715 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(empty_marker_name)),
1716 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(byte_signature)),
1717 0);
1718 const BasicType type = Signature::basic_type(vmSymbols::byte_signature());
1719 fac->update(false, type, false);
1720 index++;
1721 }
1722
1723 if (instance_fields_count > 0) {
1724 _has_nonstatic_fields = true;
1725 }
1726
1727 assert(NULL == _fields, "invariant");
1728
1729 _fields =
1730 MetadataFactory::new_array<u2>(_loader_data,
1731 index * FieldInfo::field_slots + num_generic_signature,
1732 CHECK);
1733 // Sometimes injected fields already exist in the Java source so
1734 // the fields array could be too long. In that case the
1735 // fields array is trimmed. Also unused slots that were reserved
1736 // for generic signature indexes are discarded.
1737 {
1738 int i = 0;
1739 for (; i < index * FieldInfo::field_slots; i++) {
1740 _fields->at_put(i, fa[i]);
1741 }
1742 for (int j = total_fields * FieldInfo::field_slots;
1743 j < generic_signature_slot; j++) {
1744 _fields->at_put(i++, fa[j]);
1745 }
1746 assert(_fields->length() == i, "");
1747 }
1748
1749 if (_need_verify && length > 1) {
1750 // Check duplicated fields
1751 ResourceMark rm(THREAD);
1752 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1753 THREAD, NameSigHash*, HASH_ROW_SIZE);
1754 initialize_hashtable(names_and_sigs);
1755 bool dup = false;
1756 const Symbol* name = NULL;
1757 const Symbol* sig = NULL;
1758 {
1759 debug_only(NoSafepointVerifier nsv;)
1760 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1761 name = fs.name();
1762 sig = fs.signature();
1763 // If no duplicates, add name/signature in hashtable names_and_sigs.
1764 if (!put_after_lookup(name, sig, names_and_sigs)) {
1765 dup = true;
1766 break;
1767 }
1768 }
1769 }
1770 if (dup) {
1771 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1772 name->as_C_string(), sig->as_klass_external_name(), THREAD);
1773 }
1774 }
1775 }
1776
1777
1778 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1779 u4 code_length,
1780 u4 exception_table_length,
1781 TRAPS) {
1782 assert(cfs != NULL, "invariant");
1783
1784 const unsafe_u2* const exception_table_start = cfs->current();
1785 assert(exception_table_start != NULL, "null exception table");
1786
1787 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1788 // end_pc,
1789 // handler_pc,
1790 // catch_type_index
1791
1792 // Will check legal target after parsing code array in verifier.
1793 if (_need_verify) {
1794 for (unsigned int i = 0; i < exception_table_length; i++) {
1795 const u2 start_pc = cfs->get_u2_fast();
1796 const u2 end_pc = cfs->get_u2_fast();
1797 const u2 handler_pc = cfs->get_u2_fast();
1798 const u2 catch_type_index = cfs->get_u2_fast();
1799 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1800 "Illegal exception table range in class file %s",
1801 CHECK_NULL);
1802 guarantee_property(handler_pc < code_length,
1803 "Illegal exception table handler in class file %s",
1804 CHECK_NULL);
1805 if (catch_type_index != 0) {
1806 guarantee_property(valid_klass_reference_at(catch_type_index),
1807 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1808 }
1809 }
1810 } else {
1811 cfs->skip_u2_fast(exception_table_length * 4);
1812 }
1813 return exception_table_start;
1814 }
1815
1816 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1817 u4 code_length,
1818 CompressedLineNumberWriteStream**const write_stream,
1819 TRAPS) {
1820
1821 const ClassFileStream* const cfs = _stream;
1822 unsigned int num_entries = cfs->get_u2(CHECK);
1823
1824 // Each entry is a u2 start_pc, and a u2 line_number
1825 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1826
1827 // Verify line number attribute and table length
1828 check_property(
1829 code_attribute_length == sizeof(u2) + length_in_bytes,
1830 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1831
1832 cfs->guarantee_more(length_in_bytes, CHECK);
1833
1834 if ((*write_stream) == NULL) {
1835 if (length_in_bytes > fixed_buffer_size) {
1836 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1837 } else {
1838 (*write_stream) = new CompressedLineNumberWriteStream(
1839 _linenumbertable_buffer, fixed_buffer_size);
1840 }
1841 }
1842
1843 while (num_entries-- > 0) {
1844 const u2 bci = cfs->get_u2_fast(); // start_pc
1845 const u2 line = cfs->get_u2_fast(); // line_number
1846 guarantee_property(bci < code_length,
1847 "Invalid pc in LineNumberTable in class file %s", CHECK);
1848 (*write_stream)->write_pair(bci, line);
1849 }
1850 }
1851
1852
1853 class LVT_Hash : public AllStatic {
1854 public:
1855
1856 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1857 /*
1858 * 3-tuple start_bci/length/slot has to be unique key,
1859 * so the following comparison seems to be redundant:
1860 * && elem->name_cp_index == entry->_elem->name_cp_index
1861 */
1862 return (e0.start_bci == e1.start_bci &&
1863 e0.length == e1.length &&
1864 e0.name_cp_index == e1.name_cp_index &&
1865 e0.slot == e1.slot);
1866 }
1867
1868 static unsigned int hash(LocalVariableTableElement const& e0) {
1869 unsigned int raw_hash = e0.start_bci;
1870
1871 raw_hash = e0.length + raw_hash * 37;
1872 raw_hash = e0.name_cp_index + raw_hash * 37;
1873 raw_hash = e0.slot + raw_hash * 37;
1874
1875 return raw_hash;
1876 }
1877 };
1878
1879
1880 // Class file LocalVariableTable elements.
1881 class Classfile_LVT_Element {
1882 public:
1883 u2 start_bci;
1884 u2 length;
1885 u2 name_cp_index;
1886 u2 descriptor_cp_index;
1887 u2 slot;
1888 };
1889
1890 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1891 LocalVariableTableElement* const lvt) {
1892 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1893 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1894 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1895 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1896 lvt->signature_cp_index = 0;
1897 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1898 }
1899
1900 // Function is used to parse both attributes:
1901 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1902 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1903 u4 code_length,
1904 u2 max_locals,
1905 u4 code_attribute_length,
1906 u2* const localvariable_table_length,
1907 bool isLVTT,
1908 TRAPS) {
1909 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1910 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1911 const unsigned int size =
1912 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1913
1914 const ConstantPool* const cp = _cp;
1915
1916 // Verify local variable table attribute has right length
1917 if (_need_verify) {
1918 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1919 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1920 }
1921
1922 const unsafe_u2* const localvariable_table_start = cfs->current();
1923 assert(localvariable_table_start != NULL, "null local variable table");
1924 if (!_need_verify) {
1925 cfs->skip_u2_fast(size);
1926 } else {
1927 cfs->guarantee_more(size * 2, CHECK_NULL);
1928 for(int i = 0; i < (*localvariable_table_length); i++) {
1929 const u2 start_pc = cfs->get_u2_fast();
1930 const u2 length = cfs->get_u2_fast();
1931 const u2 name_index = cfs->get_u2_fast();
1932 const u2 descriptor_index = cfs->get_u2_fast();
1933 const u2 index = cfs->get_u2_fast();
1934 // Assign to a u4 to avoid overflow
1935 const u4 end_pc = (u4)start_pc + (u4)length;
1936
1937 if (start_pc >= code_length) {
1938 classfile_parse_error(
1939 "Invalid start_pc %u in %s in class file %s",
1940 start_pc, tbl_name, THREAD);
1941 return NULL;
1942 }
1943 if (end_pc > code_length) {
1944 classfile_parse_error(
1945 "Invalid length %u in %s in class file %s",
1946 length, tbl_name, THREAD);
1947 return NULL;
1948 }
1949 const int cp_size = cp->length();
1950 guarantee_property(valid_symbol_at(name_index),
1951 "Name index %u in %s has bad constant type in class file %s",
1952 name_index, tbl_name, CHECK_NULL);
1953 guarantee_property(valid_symbol_at(descriptor_index),
1954 "Signature index %u in %s has bad constant type in class file %s",
1955 descriptor_index, tbl_name, CHECK_NULL);
1956
1957 const Symbol* const name = cp->symbol_at(name_index);
1958 const Symbol* const sig = cp->symbol_at(descriptor_index);
1959 verify_legal_field_name(name, CHECK_NULL);
1960 u2 extra_slot = 0;
1961 if (!isLVTT) {
1962 verify_legal_field_signature(name, sig, CHECK_NULL);
1963
1964 // 4894874: check special cases for double and long local variables
1965 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1966 sig == vmSymbols::type_signature(T_LONG)) {
1967 extra_slot = 1;
1968 }
1969 }
1970 guarantee_property((index + extra_slot) < max_locals,
1971 "Invalid index %u in %s in class file %s",
1972 index, tbl_name, CHECK_NULL);
1973 }
1974 }
1975 return localvariable_table_start;
1976 }
1977
1978 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1979 u4 code_attribute_length,
1980 bool need_verify,
1981 TRAPS) {
1982 assert(cfs != NULL, "invariant");
1983
1984 if (0 == code_attribute_length) {
1985 return NULL;
1986 }
1987
1988 const u1* const stackmap_table_start = cfs->current();
1989 assert(stackmap_table_start != NULL, "null stackmap table");
1990
1991 // check code_attribute_length first
1992 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1993
1994 if (!need_verify && !DumpSharedSpaces) {
1995 return NULL;
1996 }
1997 return stackmap_table_start;
1998 }
1999
2000 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2001 u2* const checked_exceptions_length,
2002 u4 method_attribute_length,
2003 TRAPS) {
2004 assert(cfs != NULL, "invariant");
2005 assert(checked_exceptions_length != NULL, "invariant");
2006
2007 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2008 *checked_exceptions_length = cfs->get_u2_fast();
2009 const unsigned int size =
2010 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2011 const unsafe_u2* const checked_exceptions_start = cfs->current();
2012 assert(checked_exceptions_start != NULL, "null checked exceptions");
2013 if (!_need_verify) {
2014 cfs->skip_u2_fast(size);
2015 } else {
2016 // Verify each value in the checked exception table
2017 u2 checked_exception;
2018 const u2 len = *checked_exceptions_length;
2019 cfs->guarantee_more(2 * len, CHECK_NULL);
2020 for (int i = 0; i < len; i++) {
2021 checked_exception = cfs->get_u2_fast();
2022 check_property(
2023 valid_klass_reference_at(checked_exception),
2024 "Exception name has bad type at constant pool %u in class file %s",
2025 checked_exception, CHECK_NULL);
2026 }
2027 }
2028 // check exceptions attribute length
2029 if (_need_verify) {
2030 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2031 sizeof(u2) * size),
2032 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2033 }
2034 return checked_exceptions_start;
2035 }
2036
2037 void ClassFileParser::throwIllegalSignature(const char* type,
2038 const Symbol* name,
2039 const Symbol* sig,
2040 TRAPS) const {
2041 assert(name != NULL, "invariant");
2042 assert(sig != NULL, "invariant");
2043
2044 const char* class_note = "";
2045 if (is_inline_type() && name == vmSymbols::object_initializer_name()) {
2046 class_note = " (an inline class)";
2047 }
2048
2049 ResourceMark rm(THREAD);
2050 Exceptions::fthrow(THREAD_AND_LOCATION,
2051 vmSymbols::java_lang_ClassFormatError(),
2052 "%s \"%s\" in class %s%s has illegal signature \"%s\"", type,
2053 name->as_C_string(), _class_name->as_C_string(), class_note, sig->as_C_string());
2054 }
2055
2056 AnnotationCollector::ID
2057 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2058 const Symbol* name,
2059 const bool can_access_vm_annotations) {
2060 const vmSymbolID sid = vmSymbols::find_sid(name);
2061 // Privileged code can use all annotations. Other code silently drops some.
2062 const bool privileged = loader_data->is_boot_class_loader_data() ||
2063 loader_data->is_platform_class_loader_data() ||
2064 can_access_vm_annotations;
2065 switch (sid) {
2066 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2067 if (_location != _in_method) break; // only allow for methods
2068 if (!privileged) break; // only allow in privileged code
2069 return _method_CallerSensitive;
2070 }
2071 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2072 if (_location != _in_method) break; // only allow for methods
2073 if (!privileged) break; // only allow in privileged code
2074 return _method_ForceInline;
2075 }
2076 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2077 if (_location != _in_method) break; // only allow for methods
2078 if (!privileged) break; // only allow in privileged code
2079 return _method_DontInline;
2080 }
2081 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ChangesCurrentThread_signature): {
2082 if (_location != _in_method) break; // only allow for methods
2083 if (!privileged) break; // only allow in privileged code
2084 return _method_ChangesCurrentThread;
2085 }
2086 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiMountTransition_signature): {
2087 if (_location != _in_method) break; // only allow for methods
2088 if (!privileged) break; // only allow in privileged code
2089 return _method_JvmtiMountTransition;
2090 }
2091 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2092 if (_location != _in_method) break; // only allow for methods
2093 if (!privileged) break; // only allow in privileged code
2094 return _method_InjectedProfile;
2095 }
2096 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2097 if (_location != _in_method) break; // only allow for methods
2098 if (!privileged) break; // only allow in privileged code
2099 return _method_LambdaForm_Compiled;
2100 }
2101 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2102 if (_location != _in_method) break; // only allow for methods
2103 if (!privileged) break; // only allow in privileged code
2104 return _method_Hidden;
2105 }
2106 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
2107 if (_location != _in_method) break; // only allow for methods
2108 if (!privileged) break; // only allow in privileged code
2109 return _method_Scoped;
2110 }
2111 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
2112 if (_location != _in_method) break; // only allow for methods
2113 if (!privileged) break; // only allow in privileged code
2114 return _method_IntrinsicCandidate;
2115 }
2116 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2117 if (_location != _in_field) break; // only allow for fields
2118 if (!privileged) break; // only allow in privileged code
2119 return _field_Stable;
2120 }
2121 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2122 if (_location != _in_field && _location != _in_class) {
2123 break; // only allow for fields and classes
2124 }
2125 if (!EnableContended || (RestrictContended && !privileged)) {
2126 break; // honor privileges
2127 }
2128 return _jdk_internal_vm_annotation_Contended;
2129 }
2130 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2131 if (_location != _in_method) break; // only allow for methods
2132 if (RestrictReservedStack && !privileged) break; // honor privileges
2133 return _jdk_internal_vm_annotation_ReservedStackAccess;
2134 }
2135 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
2136 if (_location != _in_class) break; // only allow for classes
2137 if (!privileged) break; // only allow in privileged code
2138 return _jdk_internal_ValueBased;
2139 }
2140 default: {
2141 break;
2142 }
2143 }
2144 return AnnotationCollector::_unknown;
2145 }
2146
2147 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2148 if (is_contended())
2149 f->set_contended_group(contended_group());
2150 if (is_stable())
2151 f->set_stable(true);
2152 }
2153
2154 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2155 // If there's an error deallocate metadata for field annotations
2156 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2157 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2158 }
2159
2160 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2161 if (has_annotation(_method_CallerSensitive))
2162 m->set_caller_sensitive(true);
2163 if (has_annotation(_method_ForceInline))
2164 m->set_force_inline(true);
2165 if (has_annotation(_method_DontInline))
2166 m->set_dont_inline(true);
2167 if (has_annotation(_method_ChangesCurrentThread))
2168 m->set_changes_current_thread(true);
2169 if (has_annotation(_method_JvmtiMountTransition))
2170 m->set_jvmti_mount_transition(true);
2171 if (has_annotation(_method_InjectedProfile))
2172 m->set_has_injected_profile(true);
2173 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2174 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2175 if (has_annotation(_method_Hidden))
2176 m->set_hidden(true);
2177 if (has_annotation(_method_Scoped))
2178 m->set_scoped(true);
2179 if (has_annotation(_method_IntrinsicCandidate) && !m->is_synthetic())
2180 m->set_intrinsic_candidate(true);
2181 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2182 m->set_has_reserved_stack_access(true);
2183 }
2184
2185 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2186 assert(ik != NULL, "invariant");
2187 if (has_annotation(_jdk_internal_vm_annotation_Contended)) {
2188 ik->set_is_contended(is_contended());
2189 }
2190 if (has_annotation(_jdk_internal_ValueBased)) {
2191 ik->set_has_value_based_class_annotation();
2192 if (DiagnoseSyncOnValueBasedClasses) {
2193 ik->set_is_value_based();
2194 }
2195 }
2196 }
2197
2198 #define MAX_ARGS_SIZE 255
2199 #define MAX_CODE_SIZE 65535
2200 #define INITIAL_MAX_LVT_NUMBER 256
2201
2202 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2203 *
2204 * Rules for LVT's and LVTT's are:
2205 * - There can be any number of LVT's and LVTT's.
2206 * - If there are n LVT's, it is the same as if there was just
2207 * one LVT containing all the entries from the n LVT's.
2208 * - There may be no more than one LVT entry per local variable.
2209 * Two LVT entries are 'equal' if these fields are the same:
2210 * start_pc, length, name, slot
2211 * - There may be no more than one LVTT entry per each LVT entry.
2212 * Each LVTT entry has to match some LVT entry.
2213 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2214 */
2215 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2216 int lvt_cnt,
2217 u2* const localvariable_table_length,
2218 const unsafe_u2** const localvariable_table_start,
2219 int lvtt_cnt,
2220 u2* const localvariable_type_table_length,
2221 const unsafe_u2** const localvariable_type_table_start,
2222 TRAPS) {
2223
2224 ResourceMark rm(THREAD);
2225
2226 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2227 256, AnyObj::RESOURCE_AREA, mtInternal,
2228 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2229
2230 LVT_HashTable* const table = new LVT_HashTable();
2231
2232 // To fill LocalVariableTable in
2233 const Classfile_LVT_Element* cf_lvt;
2234 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2235
2236 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2237 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2238 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2239 copy_lvt_element(&cf_lvt[idx], lvt);
2240 // If no duplicates, add LVT elem in hashtable.
2241 if (table->put(*lvt, lvt) == false
2242 && _need_verify
2243 && _major_version >= JAVA_1_5_VERSION) {
2244 classfile_parse_error("Duplicated LocalVariableTable attribute "
2245 "entry for '%s' in class file %s",
2246 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2247 THREAD);
2248 return;
2249 }
2250 }
2251 }
2252
2253 // To merge LocalVariableTable and LocalVariableTypeTable
2254 const Classfile_LVT_Element* cf_lvtt;
2255 LocalVariableTableElement lvtt_elem;
2256
2257 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2258 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2259 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2260 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2261 LocalVariableTableElement** entry = table->get(lvtt_elem);
2262 if (entry == NULL) {
2263 if (_need_verify) {
2264 classfile_parse_error("LVTT entry for '%s' in class file %s "
2265 "does not match any LVT entry",
2266 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2267 THREAD);
2268 return;
2269 }
2270 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2271 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2272 "entry for '%s' in class file %s",
2273 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2274 THREAD);
2275 return;
2276 } else {
2277 // to add generic signatures into LocalVariableTable
2278 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2279 }
2280 }
2281 }
2282 }
2283
2284
2285 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2286 const u1* runtime_visible_annotations,
2287 int runtime_visible_annotations_length,
2288 const u1* runtime_invisible_annotations,
2289 int runtime_invisible_annotations_length,
2290 const u1* runtime_visible_parameter_annotations,
2291 int runtime_visible_parameter_annotations_length,
2292 const u1* runtime_invisible_parameter_annotations,
2293 int runtime_invisible_parameter_annotations_length,
2294 const u1* runtime_visible_type_annotations,
2295 int runtime_visible_type_annotations_length,
2296 const u1* runtime_invisible_type_annotations,
2297 int runtime_invisible_type_annotations_length,
2298 const u1* annotation_default,
2299 int annotation_default_length,
2300 TRAPS) {
2301
2302 AnnotationArray* a;
2303
2304 if (runtime_visible_annotations_length +
2305 runtime_invisible_annotations_length > 0) {
2306 a = assemble_annotations(runtime_visible_annotations,
2307 runtime_visible_annotations_length,
2308 runtime_invisible_annotations,
2309 runtime_invisible_annotations_length,
2310 CHECK);
2311 cm->set_method_annotations(a);
2312 }
2313
2314 if (runtime_visible_parameter_annotations_length +
2315 runtime_invisible_parameter_annotations_length > 0) {
2316 a = assemble_annotations(runtime_visible_parameter_annotations,
2317 runtime_visible_parameter_annotations_length,
2318 runtime_invisible_parameter_annotations,
2319 runtime_invisible_parameter_annotations_length,
2320 CHECK);
2321 cm->set_parameter_annotations(a);
2322 }
2323
2324 if (annotation_default_length > 0) {
2325 a = assemble_annotations(annotation_default,
2326 annotation_default_length,
2327 NULL,
2328 0,
2329 CHECK);
2330 cm->set_default_annotations(a);
2331 }
2332
2333 if (runtime_visible_type_annotations_length +
2334 runtime_invisible_type_annotations_length > 0) {
2335 a = assemble_annotations(runtime_visible_type_annotations,
2336 runtime_visible_type_annotations_length,
2337 runtime_invisible_type_annotations,
2338 runtime_invisible_type_annotations_length,
2339 CHECK);
2340 cm->set_type_annotations(a);
2341 }
2342 }
2343
2344
2345 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2346 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2347 // Method* to save footprint, so we only know the size of the resulting Method* when the
2348 // entire method attribute is parsed.
2349 //
2350 // The has_localvariable_table parameter is used to pass up the value to InstanceKlass.
2351
2352 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2353 bool is_interface,
2354 bool is_value_class,
2355 bool is_abstract_class,
2356 const ConstantPool* cp,
2357 bool* const has_localvariable_table,
2358 TRAPS) {
2359 assert(cfs != NULL, "invariant");
2360 assert(cp != NULL, "invariant");
2361 assert(has_localvariable_table != NULL, "invariant");
2362
2363 ResourceMark rm(THREAD);
2364 // Parse fixed parts:
2365 // access_flags, name_index, descriptor_index, attributes_count
2366 cfs->guarantee_more(8, CHECK_NULL);
2367
2368 int flags = cfs->get_u2_fast();
2369 const u2 name_index = cfs->get_u2_fast();
2370 const int cp_size = cp->length();
2371 check_property(
2372 valid_symbol_at(name_index),
2373 "Illegal constant pool index %u for method name in class file %s",
2374 name_index, CHECK_NULL);
2375 const Symbol* const name = cp->symbol_at(name_index);
2376 verify_legal_method_name(name, CHECK_NULL);
2377
2378 const u2 signature_index = cfs->get_u2_fast();
2379 guarantee_property(
2380 valid_symbol_at(signature_index),
2381 "Illegal constant pool index %u for method signature in class file %s",
2382 signature_index, CHECK_NULL);
2383 const Symbol* const signature = cp->symbol_at(signature_index);
2384
2385 if (name == vmSymbols::class_initializer_name()) {
2386 // We ignore the other access flags for a valid class initializer.
2387 // (JVM Spec 2nd ed., chapter 4.6)
2388 if (_major_version < 51) { // backward compatibility
2389 flags = JVM_ACC_STATIC;
2390 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2391 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2392 } else {
2393 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2394 return NULL;
2395 }
2396 } else {
2397 verify_legal_method_modifiers(flags, access_flags() , name, CHECK_NULL);
2398 }
2399
2400 if (EnableValhalla && supports_inline_types() && name == vmSymbols::inline_factory_name()) {
2401 if (is_interface) {
2402 classfile_parse_error("Interface cannot have a method named <vnew>, class file %s", CHECK_NULL);
2403 } else if (!is_value_class) {
2404 classfile_parse_error("Identity class cannot have a method <vnew>, class file %s", CHECK_NULL);
2405 } else if (signature->is_void_method_signature()) {
2406 classfile_parse_error("Factory method <vnew> must have a non-void return type, class file %s", CHECK_NULL);
2407 } else { // also OK, a static factory, as long as the return value is good
2408 bool ok = false;
2409 SignatureStream ss((Symbol*) signature, true);
2410 while (!ss.at_return_type()) ss.next();
2411 if (ss.is_reference()) {
2412 Symbol* ret = ss.as_symbol();
2413 const Symbol* required = class_name();
2414 if (is_hidden()) {
2415 // The original class name for hidden classes changed.
2416 /// So using the original name in the return type is no longer valid.
2417 required = vmSymbols::java_lang_Object();
2418 }
2419 ok = (ret == required);
2420 }
2421 if (!ok) {
2422 throwIllegalSignature("Method", name, signature, CHECK_0);
2423 }
2424 // factory method, with a non-void return. No other
2425 // definition of <vnew> is possible.
2426 //
2427 // The verifier (in verify_invoke_instructions) will inspect the
2428 // signature of any attempt to invoke <vnew>, and ensure that it
2429 // returns non-void.
2430 }
2431 }
2432
2433 if (name == vmSymbols::object_initializer_name()) {
2434 if (is_interface) {
2435 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2436 } else if ((!is_value_class || is_abstract_class) && signature->is_void_method_signature()) {
2437 // OK, a constructor
2438 } else {
2439 // not OK, so throw the same error as in verify_legal_method_signature.
2440 throwIllegalSignature("Method", name, signature, CHECK_0);
2441 }
2442 // A declared <init> method must always be a non-static
2443 // object constructor, with a void return.
2444 //
2445 // The verifier (in verify_invoke_instructions) will inspect the
2446 // signature of any attempt to invoke <init>, and ensure that it
2447 // returns void.
2448 }
2449
2450 if (EnableValhalla) {
2451 if (((flags & JVM_ACC_SYNCHRONIZED) == JVM_ACC_SYNCHRONIZED)
2452 && ((flags & JVM_ACC_STATIC) == 0 )
2453 && !carries_identity_modifier()) {
2454 classfile_parse_error("Invalid synchronized method in non-identity class %s", THREAD);
2455 return NULL;
2456 }
2457 }
2458
2459 int args_size = -1; // only used when _need_verify is true
2460 if (_need_verify) {
2461 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2462 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2463 verify_legal_method_signature(name, signature, CHECK_NULL);
2464 if (args_size > MAX_ARGS_SIZE) {
2465 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2466 return NULL;
2467 }
2468 }
2469
2470 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2471
2472 // Default values for code and exceptions attribute elements
2473 u2 max_stack = 0;
2474 u2 max_locals = 0;
2475 u4 code_length = 0;
2476 const u1* code_start = 0;
2477 u2 exception_table_length = 0;
2478 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2479 Array<int>* exception_handlers = Universe::the_empty_int_array();
2480 u2 checked_exceptions_length = 0;
2481 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2482 CompressedLineNumberWriteStream* linenumber_table = NULL;
2483 int linenumber_table_length = 0;
2484 int total_lvt_length = 0;
2485 u2 lvt_cnt = 0;
2486 u2 lvtt_cnt = 0;
2487 bool lvt_allocated = false;
2488 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2489 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2490 u2* localvariable_table_length = NULL;
2491 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2492 u2* localvariable_type_table_length = NULL;
2493 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2494 int method_parameters_length = -1;
2495 const u1* method_parameters_data = NULL;
2496 bool method_parameters_seen = false;
2497 bool parsed_code_attribute = false;
2498 bool parsed_checked_exceptions_attribute = false;
2499 bool parsed_stackmap_attribute = false;
2500 // stackmap attribute - JDK1.5
2501 const u1* stackmap_data = NULL;
2502 int stackmap_data_length = 0;
2503 u2 generic_signature_index = 0;
2504 MethodAnnotationCollector parsed_annotations;
2505 const u1* runtime_visible_annotations = NULL;
2506 int runtime_visible_annotations_length = 0;
2507 const u1* runtime_invisible_annotations = NULL;
2508 int runtime_invisible_annotations_length = 0;
2509 const u1* runtime_visible_parameter_annotations = NULL;
2510 int runtime_visible_parameter_annotations_length = 0;
2511 const u1* runtime_invisible_parameter_annotations = NULL;
2512 int runtime_invisible_parameter_annotations_length = 0;
2513 const u1* runtime_visible_type_annotations = NULL;
2514 int runtime_visible_type_annotations_length = 0;
2515 const u1* runtime_invisible_type_annotations = NULL;
2516 int runtime_invisible_type_annotations_length = 0;
2517 bool runtime_invisible_annotations_exists = false;
2518 bool runtime_invisible_type_annotations_exists = false;
2519 bool runtime_invisible_parameter_annotations_exists = false;
2520 const u1* annotation_default = NULL;
2521 int annotation_default_length = 0;
2522
2523 // Parse code and exceptions attribute
2524 u2 method_attributes_count = cfs->get_u2_fast();
2525 while (method_attributes_count--) {
2526 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2527 const u2 method_attribute_name_index = cfs->get_u2_fast();
2528 const u4 method_attribute_length = cfs->get_u4_fast();
2529 check_property(
2530 valid_symbol_at(method_attribute_name_index),
2531 "Invalid method attribute name index %u in class file %s",
2532 method_attribute_name_index, CHECK_NULL);
2533
2534 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2535 if (method_attribute_name == vmSymbols::tag_code()) {
2536 // Parse Code attribute
2537 if (_need_verify) {
2538 guarantee_property(
2539 !access_flags.is_native() && !access_flags.is_abstract(),
2540 "Code attribute in native or abstract methods in class file %s",
2541 CHECK_NULL);
2542 }
2543 if (parsed_code_attribute) {
2544 classfile_parse_error("Multiple Code attributes in class file %s",
2545 THREAD);
2546 return NULL;
2547 }
2548 parsed_code_attribute = true;
2549
2550 // Stack size, locals size, and code size
2551 cfs->guarantee_more(8, CHECK_NULL);
2552 max_stack = cfs->get_u2_fast();
2553 max_locals = cfs->get_u2_fast();
2554 code_length = cfs->get_u4_fast();
2555 if (_need_verify) {
2556 guarantee_property(args_size <= max_locals,
2557 "Arguments can't fit into locals in class file %s",
2558 CHECK_NULL);
2559 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2560 "Invalid method Code length %u in class file %s",
2561 code_length, CHECK_NULL);
2562 }
2563 // Code pointer
2564 code_start = cfs->current();
2565 assert(code_start != NULL, "null code start");
2566 cfs->guarantee_more(code_length, CHECK_NULL);
2567 cfs->skip_u1_fast(code_length);
2568
2569 // Exception handler table
2570 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2571 exception_table_length = cfs->get_u2_fast();
2572 if (exception_table_length > 0) {
2573 exception_table_start = parse_exception_table(cfs,
2574 code_length,
2575 exception_table_length,
2576 CHECK_NULL);
2577 }
2578
2579 // Parse additional attributes in code attribute
2580 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2581 u2 code_attributes_count = cfs->get_u2_fast();
2582
2583 unsigned int calculated_attribute_length = 0;
2584
2585 calculated_attribute_length =
2586 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2587 calculated_attribute_length +=
2588 code_length +
2589 sizeof(exception_table_length) +
2590 sizeof(code_attributes_count) +
2591 exception_table_length *
2592 ( sizeof(u2) + // start_pc
2593 sizeof(u2) + // end_pc
2594 sizeof(u2) + // handler_pc
2595 sizeof(u2) ); // catch_type_index
2596
2597 while (code_attributes_count--) {
2598 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2599 const u2 code_attribute_name_index = cfs->get_u2_fast();
2600 const u4 code_attribute_length = cfs->get_u4_fast();
2601 calculated_attribute_length += code_attribute_length +
2602 sizeof(code_attribute_name_index) +
2603 sizeof(code_attribute_length);
2604 check_property(valid_symbol_at(code_attribute_name_index),
2605 "Invalid code attribute name index %u in class file %s",
2606 code_attribute_name_index,
2607 CHECK_NULL);
2608 if (LoadLineNumberTables &&
2609 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2610 // Parse and compress line number table
2611 parse_linenumber_table(code_attribute_length,
2612 code_length,
2613 &linenumber_table,
2614 CHECK_NULL);
2615
2616 } else if (LoadLocalVariableTables &&
2617 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2618 // Parse local variable table
2619 if (!lvt_allocated) {
2620 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2621 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2622 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2623 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2624 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2625 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2626 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2627 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2628 lvt_allocated = true;
2629 }
2630 if (lvt_cnt == max_lvt_cnt) {
2631 max_lvt_cnt <<= 1;
2632 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2633 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2634 }
2635 localvariable_table_start[lvt_cnt] =
2636 parse_localvariable_table(cfs,
2637 code_length,
2638 max_locals,
2639 code_attribute_length,
2640 &localvariable_table_length[lvt_cnt],
2641 false, // is not LVTT
2642 CHECK_NULL);
2643 total_lvt_length += localvariable_table_length[lvt_cnt];
2644 lvt_cnt++;
2645 } else if (LoadLocalVariableTypeTables &&
2646 _major_version >= JAVA_1_5_VERSION &&
2647 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2648 if (!lvt_allocated) {
2649 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2650 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2651 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2652 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2653 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2654 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2655 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2656 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2657 lvt_allocated = true;
2658 }
2659 // Parse local variable type table
2660 if (lvtt_cnt == max_lvtt_cnt) {
2661 max_lvtt_cnt <<= 1;
2662 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2663 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2664 }
2665 localvariable_type_table_start[lvtt_cnt] =
2666 parse_localvariable_table(cfs,
2667 code_length,
2668 max_locals,
2669 code_attribute_length,
2670 &localvariable_type_table_length[lvtt_cnt],
2671 true, // is LVTT
2672 CHECK_NULL);
2673 lvtt_cnt++;
2674 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2675 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2676 // Stack map is only needed by the new verifier in JDK1.5.
2677 if (parsed_stackmap_attribute) {
2678 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2679 return NULL;
2680 }
2681 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2682 stackmap_data_length = code_attribute_length;
2683 parsed_stackmap_attribute = true;
2684 } else {
2685 // Skip unknown attributes
2686 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2687 }
2688 }
2689 // check method attribute length
2690 if (_need_verify) {
2691 guarantee_property(method_attribute_length == calculated_attribute_length,
2692 "Code segment has wrong length in class file %s",
2693 CHECK_NULL);
2694 }
2695 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2696 // Parse Exceptions attribute
2697 if (parsed_checked_exceptions_attribute) {
2698 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2699 THREAD);
2700 return NULL;
2701 }
2702 parsed_checked_exceptions_attribute = true;
2703 checked_exceptions_start =
2704 parse_checked_exceptions(cfs,
2705 &checked_exceptions_length,
2706 method_attribute_length,
2707 CHECK_NULL);
2708 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2709 // reject multiple method parameters
2710 if (method_parameters_seen) {
2711 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2712 THREAD);
2713 return NULL;
2714 }
2715 method_parameters_seen = true;
2716 method_parameters_length = cfs->get_u1_fast();
2717 const u2 real_length = (method_parameters_length * 4u) + 1u;
2718 if (method_attribute_length != real_length) {
2719 classfile_parse_error(
2720 "Invalid MethodParameters method attribute length %u in class file",
2721 method_attribute_length, THREAD);
2722 return NULL;
2723 }
2724 method_parameters_data = cfs->current();
2725 cfs->skip_u2_fast(method_parameters_length);
2726 cfs->skip_u2_fast(method_parameters_length);
2727 // ignore this attribute if it cannot be reflected
2728 if (!vmClasses::Parameter_klass_loaded())
2729 method_parameters_length = -1;
2730 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2731 if (method_attribute_length != 0) {
2732 classfile_parse_error(
2733 "Invalid Synthetic method attribute length %u in class file %s",
2734 method_attribute_length, THREAD);
2735 return NULL;
2736 }
2737 // Should we check that there hasn't already been a synthetic attribute?
2738 access_flags.set_is_synthetic();
2739 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2740 if (method_attribute_length != 0) {
2741 classfile_parse_error(
2742 "Invalid Deprecated method attribute length %u in class file %s",
2743 method_attribute_length, THREAD);
2744 return NULL;
2745 }
2746 } else if (_major_version >= JAVA_1_5_VERSION) {
2747 if (method_attribute_name == vmSymbols::tag_signature()) {
2748 if (generic_signature_index != 0) {
2749 classfile_parse_error(
2750 "Multiple Signature attributes for method in class file %s",
2751 THREAD);
2752 return NULL;
2753 }
2754 if (method_attribute_length != 2) {
2755 classfile_parse_error(
2756 "Invalid Signature attribute length %u in class file %s",
2757 method_attribute_length, THREAD);
2758 return NULL;
2759 }
2760 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2761 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2762 if (runtime_visible_annotations != NULL) {
2763 classfile_parse_error(
2764 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2765 THREAD);
2766 return NULL;
2767 }
2768 runtime_visible_annotations_length = method_attribute_length;
2769 runtime_visible_annotations = cfs->current();
2770 assert(runtime_visible_annotations != NULL, "null visible annotations");
2771 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2772 parse_annotations(cp,
2773 runtime_visible_annotations,
2774 runtime_visible_annotations_length,
2775 &parsed_annotations,
2776 _loader_data,
2777 _can_access_vm_annotations);
2778 cfs->skip_u1_fast(runtime_visible_annotations_length);
2779 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2780 if (runtime_invisible_annotations_exists) {
2781 classfile_parse_error(
2782 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2783 THREAD);
2784 return NULL;
2785 }
2786 runtime_invisible_annotations_exists = true;
2787 if (PreserveAllAnnotations) {
2788 runtime_invisible_annotations_length = method_attribute_length;
2789 runtime_invisible_annotations = cfs->current();
2790 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2791 }
2792 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2793 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2794 if (runtime_visible_parameter_annotations != NULL) {
2795 classfile_parse_error(
2796 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2797 THREAD);
2798 return NULL;
2799 }
2800 runtime_visible_parameter_annotations_length = method_attribute_length;
2801 runtime_visible_parameter_annotations = cfs->current();
2802 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2803 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2804 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2805 if (runtime_invisible_parameter_annotations_exists) {
2806 classfile_parse_error(
2807 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2808 THREAD);
2809 return NULL;
2810 }
2811 runtime_invisible_parameter_annotations_exists = true;
2812 if (PreserveAllAnnotations) {
2813 runtime_invisible_parameter_annotations_length = method_attribute_length;
2814 runtime_invisible_parameter_annotations = cfs->current();
2815 assert(runtime_invisible_parameter_annotations != NULL,
2816 "null invisible parameter annotations");
2817 }
2818 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2819 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2820 if (annotation_default != NULL) {
2821 classfile_parse_error(
2822 "Multiple AnnotationDefault attributes for method in class file %s",
2823 THREAD);
2824 return NULL;
2825 }
2826 annotation_default_length = method_attribute_length;
2827 annotation_default = cfs->current();
2828 assert(annotation_default != NULL, "null annotation default");
2829 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2830 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2831 if (runtime_visible_type_annotations != NULL) {
2832 classfile_parse_error(
2833 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2834 THREAD);
2835 return NULL;
2836 }
2837 runtime_visible_type_annotations_length = method_attribute_length;
2838 runtime_visible_type_annotations = cfs->current();
2839 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2840 // No need for the VM to parse Type annotations
2841 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2842 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2843 if (runtime_invisible_type_annotations_exists) {
2844 classfile_parse_error(
2845 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2846 THREAD);
2847 return NULL;
2848 } else {
2849 runtime_invisible_type_annotations_exists = true;
2850 }
2851 if (PreserveAllAnnotations) {
2852 runtime_invisible_type_annotations_length = method_attribute_length;
2853 runtime_invisible_type_annotations = cfs->current();
2854 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2855 }
2856 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2857 } else {
2858 // Skip unknown attributes
2859 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2860 }
2861 } else {
2862 // Skip unknown attributes
2863 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2864 }
2865 }
2866
2867 if (linenumber_table != NULL) {
2868 linenumber_table->write_terminator();
2869 linenumber_table_length = linenumber_table->position();
2870 }
2871
2872 // Make sure there's at least one Code attribute in non-native/non-abstract method
2873 if (_need_verify) {
2874 guarantee_property(access_flags.is_native() ||
2875 access_flags.is_abstract() ||
2876 parsed_code_attribute,
2877 "Absent Code attribute in method that is not native or abstract in class file %s",
2878 CHECK_NULL);
2879 }
2880
2881 // All sizing information for a Method* is finally available, now create it
2882 InlineTableSizes sizes(
2883 total_lvt_length,
2884 linenumber_table_length,
2885 exception_table_length,
2886 checked_exceptions_length,
2887 method_parameters_length,
2888 generic_signature_index,
2889 runtime_visible_annotations_length +
2890 runtime_invisible_annotations_length,
2891 runtime_visible_parameter_annotations_length +
2892 runtime_invisible_parameter_annotations_length,
2893 runtime_visible_type_annotations_length +
2894 runtime_invisible_type_annotations_length,
2895 annotation_default_length,
2896 0);
2897
2898 Method* const m = Method::allocate(_loader_data,
2899 code_length,
2900 access_flags,
2901 &sizes,
2902 ConstMethod::NORMAL,
2903 _cp->symbol_at(name_index),
2904 CHECK_NULL);
2905
2906 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2907
2908 // Fill in information from fixed part (access_flags already set)
2909 m->set_constants(_cp);
2910 m->set_name_index(name_index);
2911 m->set_signature_index(signature_index);
2912 m->compute_from_signature(cp->symbol_at(signature_index));
2913 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2914
2915 // Fill in code attribute information
2916 m->set_max_stack(max_stack);
2917 m->set_max_locals(max_locals);
2918 if (stackmap_data != NULL) {
2919 m->constMethod()->copy_stackmap_data(_loader_data,
2920 (u1*)stackmap_data,
2921 stackmap_data_length,
2922 CHECK_NULL);
2923 }
2924
2925 // Copy byte codes
2926 m->set_code((u1*)code_start);
2927
2928 // Copy line number table
2929 if (linenumber_table != NULL) {
2930 memcpy(m->compressed_linenumber_table(),
2931 linenumber_table->buffer(),
2932 linenumber_table_length);
2933 }
2934
2935 // Copy exception table
2936 if (exception_table_length > 0) {
2937 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2938 m->exception_table_start(),
2939 exception_table_length * sizeof(ExceptionTableElement),
2940 sizeof(u2));
2941 }
2942
2943 // Copy method parameters
2944 if (method_parameters_length > 0) {
2945 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2946 for (int i = 0; i < method_parameters_length; i++) {
2947 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2948 method_parameters_data += 2;
2949 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2950 method_parameters_data += 2;
2951 }
2952 }
2953
2954 // Copy checked exceptions
2955 if (checked_exceptions_length > 0) {
2956 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2957 m->checked_exceptions_start(),
2958 checked_exceptions_length * sizeof(CheckedExceptionElement),
2959 sizeof(u2));
2960 }
2961
2962 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2963 if (total_lvt_length > 0) {
2964 *has_localvariable_table = true;
2965 copy_localvariable_table(m->constMethod(),
2966 lvt_cnt,
2967 localvariable_table_length,
2968 localvariable_table_start,
2969 lvtt_cnt,
2970 localvariable_type_table_length,
2971 localvariable_type_table_start,
2972 CHECK_NULL);
2973 }
2974
2975 if (parsed_annotations.has_any_annotations())
2976 parsed_annotations.apply_to(methodHandle(THREAD, m));
2977
2978 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2979 m->set_hidden(true);
2980 }
2981
2982 // Copy annotations
2983 copy_method_annotations(m->constMethod(),
2984 runtime_visible_annotations,
2985 runtime_visible_annotations_length,
2986 runtime_invisible_annotations,
2987 runtime_invisible_annotations_length,
2988 runtime_visible_parameter_annotations,
2989 runtime_visible_parameter_annotations_length,
2990 runtime_invisible_parameter_annotations,
2991 runtime_invisible_parameter_annotations_length,
2992 runtime_visible_type_annotations,
2993 runtime_visible_type_annotations_length,
2994 runtime_invisible_type_annotations,
2995 runtime_invisible_type_annotations_length,
2996 annotation_default,
2997 annotation_default_length,
2998 CHECK_NULL);
2999
3000 if (InstanceKlass::is_finalization_enabled() &&
3001 name == vmSymbols::finalize_method_name() &&
3002 signature == vmSymbols::void_method_signature()) {
3003 if (m->is_empty_method()) {
3004 _has_empty_finalizer = true;
3005 } else {
3006 _has_finalizer = true;
3007 }
3008 }
3009 if (name == vmSymbols::object_initializer_name() &&
3010 signature == vmSymbols::void_method_signature() &&
3011 m->is_vanilla_constructor()) {
3012 _has_vanilla_constructor = true;
3013 }
3014
3015 NOT_PRODUCT(m->verify());
3016 return m;
3017 }
3018
3019
3020 // Side-effects: populates the _methods field in the parser
3021 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
3022 bool is_interface,
3023 bool is_value_class,
3024 bool is_abstract_type,
3025 bool* const has_localvariable_table,
3026 bool* has_final_method,
3027 bool* declares_nonstatic_concrete_methods,
3028 TRAPS) {
3029 assert(cfs != NULL, "invariant");
3030 assert(has_localvariable_table != NULL, "invariant");
3031 assert(has_final_method != NULL, "invariant");
3032 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
3033
3034 assert(NULL == _methods, "invariant");
3035
3036 cfs->guarantee_more(2, CHECK); // length
3037 const u2 length = cfs->get_u2_fast();
3038 if (length == 0) {
3039 _methods = Universe::the_empty_method_array();
3040 } else {
3041 _methods = MetadataFactory::new_array<Method*>(_loader_data,
3042 length,
3043 NULL,
3044 CHECK);
3045
3046 for (int index = 0; index < length; index++) {
3047 Method* method = parse_method(cfs,
3048 is_interface,
3049 is_value_class,
3050 is_abstract_type,
3051 _cp,
3052 has_localvariable_table,
3053 CHECK);
3054
3055 if (method->is_final()) {
3056 *has_final_method = true;
3057 }
3058 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3059 // used for interface initialization, and default method inheritance analysis
3060 if (is_interface && !(*declares_nonstatic_concrete_methods)
3061 && !method->is_abstract() && !method->is_static()) {
3062 *declares_nonstatic_concrete_methods = true;
3063 }
3064 _methods->at_put(index, method);
3065 }
3066
3067 if (_need_verify && length > 1) {
3068 // Check duplicated methods
3069 ResourceMark rm(THREAD);
3070 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3071 THREAD, NameSigHash*, HASH_ROW_SIZE);
3072 initialize_hashtable(names_and_sigs);
3073 bool dup = false;
3074 const Symbol* name = NULL;
3075 const Symbol* sig = NULL;
3076 {
3077 debug_only(NoSafepointVerifier nsv;)
3078 for (int i = 0; i < length; i++) {
3079 const Method* const m = _methods->at(i);
3080 name = m->name();
3081 sig = m->signature();
3082 // If no duplicates, add name/signature in hashtable names_and_sigs.
3083 if (!put_after_lookup(name, sig, names_and_sigs)) {
3084 dup = true;
3085 break;
3086 }
3087 }
3088 }
3089 if (dup) {
3090 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3091 name->as_C_string(), sig->as_klass_external_name(), THREAD);
3092 }
3093 }
3094 }
3095 }
3096
3097 static const intArray* sort_methods(Array<Method*>* methods) {
3098 const int length = methods->length();
3099 // If JVMTI original method ordering or sharing is enabled we have to
3100 // remember the original class file ordering.
3101 // We temporarily use the vtable_index field in the Method* to store the
3102 // class file index, so we can read in after calling qsort.
3103 // Put the method ordering in the shared archive.
3104 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3105 for (int index = 0; index < length; index++) {
3106 Method* const m = methods->at(index);
3107 assert(!m->valid_vtable_index(), "vtable index should not be set");
3108 m->set_vtable_index(index);
3109 }
3110 }
3111 // Sort method array by ascending method name (for faster lookups & vtable construction)
3112 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3113 Method::sort_methods(methods);
3114
3115 intArray* method_ordering = NULL;
3116 // If JVMTI original method ordering or sharing is enabled construct int
3117 // array remembering the original ordering
3118 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3119 method_ordering = new intArray(length, length, -1);
3120 for (int index = 0; index < length; index++) {
3121 Method* const m = methods->at(index);
3122 const int old_index = m->vtable_index();
3123 assert(old_index >= 0 && old_index < length, "invalid method index");
3124 method_ordering->at_put(index, old_index);
3125 m->set_vtable_index(Method::invalid_vtable_index);
3126 }
3127 }
3128 return method_ordering;
3129 }
3130
3131 // Parse generic_signature attribute for methods and fields
3132 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3133 TRAPS) {
3134 assert(cfs != NULL, "invariant");
3135
3136 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3137 const u2 generic_signature_index = cfs->get_u2_fast();
3138 check_property(
3139 valid_symbol_at(generic_signature_index),
3140 "Invalid Signature attribute at constant pool index %u in class file %s",
3141 generic_signature_index, CHECK_0);
3142 return generic_signature_index;
3143 }
3144
3145 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3146 TRAPS) {
3147
3148 assert(cfs != NULL, "invariant");
3149
3150 cfs->guarantee_more(2, CHECK); // sourcefile_index
3151 const u2 sourcefile_index = cfs->get_u2_fast();
3152 check_property(
3153 valid_symbol_at(sourcefile_index),
3154 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3155 sourcefile_index, CHECK);
3156 set_class_sourcefile_index(sourcefile_index);
3157 }
3158
3159 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3160 int length,
3161 TRAPS) {
3162 assert(cfs != NULL, "invariant");
3163
3164 const u1* const sde_buffer = cfs->current();
3165 assert(sde_buffer != NULL, "null sde buffer");
3166
3167 // Don't bother storing it if there is no way to retrieve it
3168 if (JvmtiExport::can_get_source_debug_extension()) {
3169 assert((length+1) > length, "Overflow checking");
3170 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3171 for (int i = 0; i < length; i++) {
3172 sde[i] = sde_buffer[i];
3173 }
3174 sde[length] = '\0';
3175 set_class_sde_buffer((const char*)sde, length);
3176 }
3177 // Got utf8 string, set stream position forward
3178 cfs->skip_u1(length, CHECK);
3179 }
3180
3181
3182 // Inner classes can be static, private or protected (classic VM does this)
3183 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3184 JVM_ACC_PRIVATE | \
3185 JVM_ACC_PROTECTED | \
3186 JVM_ACC_STATIC \
3187 )
3188
3189 // Find index of the InnerClasses entry for the specified inner_class_info_index.
3190 // Return -1 if none is found.
3191 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3192 Symbol* cp_klass_name = cp->klass_name_at(inner);
3193 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3194 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3195 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
3196 return idx;
3197 }
3198 }
3199 return -1;
3200 }
3201
3202 // Return the outer_class_info_index for the InnerClasses entry containing the
3203 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
3204 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3205 if (inner == 0) return -1;
3206 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
3207 if (idx == -1) return -1;
3208 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3209 return result;
3210 }
3211
3212 // Return true if circularity is found, false if no circularity is found.
3213 // Use Floyd's cycle finding algorithm.
3214 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
3215 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3216 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3217
3218 while (fast != -1 && fast != 0) {
3219 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
3220 return true; // found a circularity
3221 }
3222 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3223 if (fast == -1) return false;
3224 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3225 if (fast == -1) return false;
3226 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
3227 assert(slow != -1, "sanity check");
3228 }
3229 return false;
3230 }
3231
3232 // Loop through each InnerClasses entry checking for circularities and duplications
3233 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
3234 // return true if a circularity or entries with duplicate inner_class_info_indexes
3235 // are found.
3236 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
3237 // Loop through each InnerClasses entry.
3238 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3239 // Return true if there are circular entries.
3240 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
3241 return true;
3242 }
3243 // Check if there are duplicate entries or entries with the same inner_class_info_index.
3244 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
3245 y += InstanceKlass::inner_class_next_offset) {
3246
3247 // 4347400: make sure there's no duplicate entry in the classes array
3248 if (_major_version >= JAVA_1_5_VERSION) {
3249 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
3250 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
3251 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
3252 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
3253 "Duplicate entry in InnerClasses attribute in class file %s",
3254 CHECK_(true));
3255 }
3256 // Return true if there are two entries with the same inner_class_info_index.
3257 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
3258 return true;
3259 }
3260 }
3261 }
3262 return false;
3263 }
3264
3265 // Return number of classes in the inner classes attribute table
3266 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3267 const ConstantPool* cp,
3268 const u1* const inner_classes_attribute_start,
3269 bool parsed_enclosingmethod_attribute,
3270 u2 enclosing_method_class_index,
3271 u2 enclosing_method_method_index,
3272 TRAPS) {
3273 const u1* const current_mark = cfs->current();
3274 u2 length = 0;
3275 if (inner_classes_attribute_start != NULL) {
3276 cfs->set_current(inner_classes_attribute_start);
3277 cfs->guarantee_more(2, CHECK_0); // length
3278 length = cfs->get_u2_fast();
3279 }
3280
3281 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3282 // method data:
3283 // [inner_class_info_index,
3284 // outer_class_info_index,
3285 // inner_name_index,
3286 // inner_class_access_flags,
3287 // ...
3288 // enclosing_method_class_index,
3289 // enclosing_method_method_index]
3290 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3291 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3292 _inner_classes = inner_classes;
3293
3294 int index = 0;
3295 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3296 for (int n = 0; n < length; n++) {
3297 // Inner class index
3298 const u2 inner_class_info_index = cfs->get_u2_fast();
3299 check_property(
3300 valid_klass_reference_at(inner_class_info_index),
3301 "inner_class_info_index %u has bad constant type in class file %s",
3302 inner_class_info_index, CHECK_0);
3303 // Outer class index
3304 const u2 outer_class_info_index = cfs->get_u2_fast();
3305 check_property(
3306 outer_class_info_index == 0 ||
3307 valid_klass_reference_at(outer_class_info_index),
3308 "outer_class_info_index %u has bad constant type in class file %s",
3309 outer_class_info_index, CHECK_0);
3310
3311 if (outer_class_info_index != 0) {
3312 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
3313 char* bytes = (char*)outer_class_name->bytes();
3314 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
3315 "Outer class is an array class in class file %s", CHECK_0);
3316 }
3317 // Inner class name
3318 const u2 inner_name_index = cfs->get_u2_fast();
3319 check_property(
3320 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3321 "inner_name_index %u has bad constant type in class file %s",
3322 inner_name_index, CHECK_0);
3323 if (_need_verify) {
3324 guarantee_property(inner_class_info_index != outer_class_info_index,
3325 "Class is both outer and inner class in class file %s", CHECK_0);
3326 }
3327
3328 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3329 // JVM_ACC_MODULE is defined in JDK-9 and later.
3330 if (_major_version >= JAVA_9_VERSION) {
3331 recognized_modifiers |= JVM_ACC_MODULE;
3332 }
3333 if (supports_inline_types()) {
3334 recognized_modifiers |= JVM_ACC_PRIMITIVE | JVM_ACC_VALUE | JVM_ACC_IDENTITY;
3335 }
3336
3337 // Access flags
3338 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3339
3340 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3341 // Set abstract bit for old class files for backward compatibility
3342 flags |= JVM_ACC_ABSTRACT;
3343 }
3344
3345 if (EnableValhalla) {
3346 if (!supports_inline_types()) {
3347 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
3348 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
3349 if (!is_module && !is_interface) {
3350 flags |= JVM_ACC_IDENTITY;
3351 }
3352 }
3353 }
3354
3355 const char* name = inner_name_index == 0 ? "unnamed" : cp->symbol_at(inner_name_index)->as_utf8();
3356 verify_legal_class_modifiers(flags, name, false, CHECK_0);
3357 AccessFlags inner_access_flags(flags);
3358
3359 inner_classes->at_put(index++, inner_class_info_index);
3360 inner_classes->at_put(index++, outer_class_info_index);
3361 inner_classes->at_put(index++, inner_name_index);
3362 inner_classes->at_put(index++, inner_access_flags.as_short());
3363 }
3364
3365 // Check for circular and duplicate entries.
3366 bool has_circularity = false;
3367 if (_need_verify) {
3368 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3369 if (has_circularity) {
3370 // If circularity check failed then ignore InnerClasses attribute.
3371 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3372 index = 0;
3373 if (parsed_enclosingmethod_attribute) {
3374 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3375 _inner_classes = inner_classes;
3376 } else {
3377 _inner_classes = Universe::the_empty_short_array();
3378 }
3379 }
3380 }
3381 // Set EnclosingMethod class and method indexes.
3382 if (parsed_enclosingmethod_attribute) {
3383 inner_classes->at_put(index++, enclosing_method_class_index);
3384 inner_classes->at_put(index++, enclosing_method_method_index);
3385 }
3386 assert(index == size || has_circularity, "wrong size");
3387
3388 // Restore buffer's current position.
3389 cfs->set_current(current_mark);
3390
3391 return length;
3392 }
3393
3394 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3395 const u1* const nest_members_attribute_start,
3396 TRAPS) {
3397 const u1* const current_mark = cfs->current();
3398 u2 length = 0;
3399 if (nest_members_attribute_start != NULL) {
3400 cfs->set_current(nest_members_attribute_start);
3401 cfs->guarantee_more(2, CHECK_0); // length
3402 length = cfs->get_u2_fast();
3403 }
3404 const int size = length;
3405 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3406 _nest_members = nest_members;
3407
3408 int index = 0;
3409 cfs->guarantee_more(2 * length, CHECK_0);
3410 for (int n = 0; n < length; n++) {
3411 const u2 class_info_index = cfs->get_u2_fast();
3412 check_property(
3413 valid_klass_reference_at(class_info_index),
3414 "Nest member class_info_index %u has bad constant type in class file %s",
3415 class_info_index, CHECK_0);
3416 nest_members->at_put(index++, class_info_index);
3417 }
3418 assert(index == size, "wrong size");
3419
3420 // Restore buffer's current position.
3421 cfs->set_current(current_mark);
3422
3423 return length;
3424 }
3425
3426 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3427 const u1* const permitted_subclasses_attribute_start,
3428 TRAPS) {
3429 const u1* const current_mark = cfs->current();
3430 u2 length = 0;
3431 if (permitted_subclasses_attribute_start != NULL) {
3432 cfs->set_current(permitted_subclasses_attribute_start);
3433 cfs->guarantee_more(2, CHECK_0); // length
3434 length = cfs->get_u2_fast();
3435 }
3436 const int size = length;
3437 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3438 _permitted_subclasses = permitted_subclasses;
3439
3440 if (length > 0) {
3441 int index = 0;
3442 cfs->guarantee_more(2 * length, CHECK_0);
3443 for (int n = 0; n < length; n++) {
3444 const u2 class_info_index = cfs->get_u2_fast();
3445 check_property(
3446 valid_klass_reference_at(class_info_index),
3447 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3448 class_info_index, CHECK_0);
3449 permitted_subclasses->at_put(index++, class_info_index);
3450 }
3451 assert(index == size, "wrong size");
3452 }
3453
3454 // Restore buffer's current position.
3455 cfs->set_current(current_mark);
3456
3457 return length;
3458 }
3459
3460 u2 ClassFileParser::parse_classfile_preload_attribute(const ClassFileStream* const cfs,
3461 const u1* const preload_attribute_start,
3462 TRAPS) {
3463 const u1* const current_mark = cfs->current();
3464 u2 length = 0;
3465 if (preload_attribute_start != NULL) {
3466 cfs->set_current(preload_attribute_start);
3467 cfs->guarantee_more(2, CHECK_0); // length
3468 length = cfs->get_u2_fast();
3469 }
3470 const int size = length;
3471 Array<u2>* const preload_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3472 _preload_classes = preload_classes;
3473 if (length > 0) {
3474 int index = 0;
3475 cfs->guarantee_more(2 * length, CHECK_0);
3476 for (int n = 0; n < length; n++) {
3477 const u2 class_info_index = cfs->get_u2_fast();
3478 check_property(
3479 valid_klass_reference_at(class_info_index),
3480 "Preload class_info_index %u has bad constant type in class file %s",
3481 class_info_index, CHECK_0);
3482 preload_classes->at_put(index++, class_info_index);
3483 }
3484 assert(index == size, "wrong size");
3485 }
3486
3487 // Restore buffer's current position.
3488 cfs->set_current(current_mark);
3489
3490 return length;
3491 }
3492
3493 // Record {
3494 // u2 attribute_name_index;
3495 // u4 attribute_length;
3496 // u2 components_count;
3497 // component_info components[components_count];
3498 // }
3499 // component_info {
3500 // u2 name_index;
3501 // u2 descriptor_index
3502 // u2 attributes_count;
3503 // attribute_info_attributes[attributes_count];
3504 // }
3505 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3506 const ConstantPool* cp,
3507 const u1* const record_attribute_start,
3508 TRAPS) {
3509 const u1* const current_mark = cfs->current();
3510 int components_count = 0;
3511 unsigned int calculate_attr_size = 0;
3512 if (record_attribute_start != NULL) {
3513 cfs->set_current(record_attribute_start);
3514 cfs->guarantee_more(2, CHECK_0); // num of components
3515 components_count = (int)cfs->get_u2_fast();
3516 calculate_attr_size = 2;
3517 }
3518
3519 Array<RecordComponent*>* const record_components =
3520 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, NULL, CHECK_0);
3521 _record_components = record_components;
3522
3523 for (int x = 0; x < components_count; x++) {
3524 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3525
3526 const u2 name_index = cfs->get_u2_fast();
3527 check_property(valid_symbol_at(name_index),
3528 "Invalid constant pool index %u for name in Record attribute in class file %s",
3529 name_index, CHECK_0);
3530 const Symbol* const name = cp->symbol_at(name_index);
3531 verify_legal_field_name(name, CHECK_0);
3532
3533 const u2 descriptor_index = cfs->get_u2_fast();
3534 check_property(valid_symbol_at(descriptor_index),
3535 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3536 descriptor_index, CHECK_0);
3537 const Symbol* const descr = cp->symbol_at(descriptor_index);
3538 verify_legal_field_signature(name, descr, CHECK_0);
3539
3540 const u2 attributes_count = cfs->get_u2_fast();
3541 calculate_attr_size += 6;
3542 u2 generic_sig_index = 0;
3543 const u1* runtime_visible_annotations = NULL;
3544 int runtime_visible_annotations_length = 0;
3545 const u1* runtime_invisible_annotations = NULL;
3546 int runtime_invisible_annotations_length = 0;
3547 bool runtime_invisible_annotations_exists = false;
3548 const u1* runtime_visible_type_annotations = NULL;
3549 int runtime_visible_type_annotations_length = 0;
3550 const u1* runtime_invisible_type_annotations = NULL;
3551 int runtime_invisible_type_annotations_length = 0;
3552 bool runtime_invisible_type_annotations_exists = false;
3553
3554 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3555 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3556 for (int y = 0; y < attributes_count; y++) {
3557 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3558 const u2 attribute_name_index = cfs->get_u2_fast();
3559 const u4 attribute_length = cfs->get_u4_fast();
3560 calculate_attr_size += 6;
3561 check_property(
3562 valid_symbol_at(attribute_name_index),
3563 "Invalid Record attribute name index %u in class file %s",
3564 attribute_name_index, CHECK_0);
3565
3566 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3567 if (attribute_name == vmSymbols::tag_signature()) {
3568 if (generic_sig_index != 0) {
3569 classfile_parse_error(
3570 "Multiple Signature attributes for Record component in class file %s",
3571 THREAD);
3572 return 0;
3573 }
3574 if (attribute_length != 2) {
3575 classfile_parse_error(
3576 "Invalid Signature attribute length %u in Record component in class file %s",
3577 attribute_length, THREAD);
3578 return 0;
3579 }
3580 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3581
3582 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3583 if (runtime_visible_annotations != NULL) {
3584 classfile_parse_error(
3585 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3586 return 0;
3587 }
3588 runtime_visible_annotations_length = attribute_length;
3589 runtime_visible_annotations = cfs->current();
3590
3591 assert(runtime_visible_annotations != NULL, "null record component visible annotation");
3592 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3593 cfs->skip_u1_fast(runtime_visible_annotations_length);
3594
3595 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3596 if (runtime_invisible_annotations_exists) {
3597 classfile_parse_error(
3598 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3599 return 0;
3600 }
3601 runtime_invisible_annotations_exists = true;
3602 if (PreserveAllAnnotations) {
3603 runtime_invisible_annotations_length = attribute_length;
3604 runtime_invisible_annotations = cfs->current();
3605 assert(runtime_invisible_annotations != NULL, "null record component invisible annotation");
3606 }
3607 cfs->skip_u1(attribute_length, CHECK_0);
3608
3609 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3610 if (runtime_visible_type_annotations != NULL) {
3611 classfile_parse_error(
3612 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3613 return 0;
3614 }
3615 runtime_visible_type_annotations_length = attribute_length;
3616 runtime_visible_type_annotations = cfs->current();
3617
3618 assert(runtime_visible_type_annotations != NULL, "null record component visible type annotation");
3619 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3620 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3621
3622 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3623 if (runtime_invisible_type_annotations_exists) {
3624 classfile_parse_error(
3625 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3626 return 0;
3627 }
3628 runtime_invisible_type_annotations_exists = true;
3629 if (PreserveAllAnnotations) {
3630 runtime_invisible_type_annotations_length = attribute_length;
3631 runtime_invisible_type_annotations = cfs->current();
3632 assert(runtime_invisible_type_annotations != NULL, "null record component invisible type annotation");
3633 }
3634 cfs->skip_u1(attribute_length, CHECK_0);
3635
3636 } else {
3637 // Skip unknown attributes
3638 cfs->skip_u1(attribute_length, CHECK_0);
3639 }
3640 calculate_attr_size += attribute_length;
3641 } // End of attributes For loop
3642
3643 AnnotationArray* annotations = assemble_annotations(runtime_visible_annotations,
3644 runtime_visible_annotations_length,
3645 runtime_invisible_annotations,
3646 runtime_invisible_annotations_length,
3647 CHECK_0);
3648 AnnotationArray* type_annotations = assemble_annotations(runtime_visible_type_annotations,
3649 runtime_visible_type_annotations_length,
3650 runtime_invisible_type_annotations,
3651 runtime_invisible_type_annotations_length,
3652 CHECK_0);
3653
3654 RecordComponent* record_component =
3655 RecordComponent::allocate(_loader_data, name_index, descriptor_index,
3656 attributes_count, generic_sig_index,
3657 annotations, type_annotations, CHECK_0);
3658 record_components->at_put(x, record_component);
3659 } // End of component processing loop
3660
3661 // Restore buffer's current position.
3662 cfs->set_current(current_mark);
3663 return calculate_attr_size;
3664 }
3665
3666 void ClassFileParser::parse_classfile_synthetic_attribute() {
3667 set_class_synthetic_flag(true);
3668 }
3669
3670 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3671 assert(cfs != NULL, "invariant");
3672
3673 const u2 signature_index = cfs->get_u2(CHECK);
3674 check_property(
3675 valid_symbol_at(signature_index),
3676 "Invalid constant pool index %u in Signature attribute in class file %s",
3677 signature_index, CHECK);
3678 set_class_generic_signature_index(signature_index);
3679 }
3680
3681 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3682 ConstantPool* cp,
3683 u4 attribute_byte_length,
3684 TRAPS) {
3685 assert(cfs != NULL, "invariant");
3686 assert(cp != NULL, "invariant");
3687
3688 const u1* const current_start = cfs->current();
3689
3690 guarantee_property(attribute_byte_length >= sizeof(u2),
3691 "Invalid BootstrapMethods attribute length %u in class file %s",
3692 attribute_byte_length,
3693 CHECK);
3694
3695 cfs->guarantee_more(attribute_byte_length, CHECK);
3696
3697 const int attribute_array_length = cfs->get_u2_fast();
3698
3699 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3700 "Short length on BootstrapMethods in class file %s",
3701 CHECK);
3702
3703
3704 // The attribute contains a counted array of counted tuples of shorts,
3705 // represending bootstrap specifiers:
3706 // length*{bootstrap_method_index, argument_count*{argument_index}}
3707 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3708 // operand_count = number of shorts in attr, except for leading length
3709
3710 // The attribute is copied into a short[] array.
3711 // The array begins with a series of short[2] pairs, one for each tuple.
3712 const int index_size = (attribute_array_length * 2);
3713
3714 Array<u2>* const operands =
3715 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3716
3717 // Eagerly assign operands so they will be deallocated with the constant
3718 // pool if there is an error.
3719 cp->set_operands(operands);
3720
3721 int operand_fill_index = index_size;
3722 const int cp_size = cp->length();
3723
3724 for (int n = 0; n < attribute_array_length; n++) {
3725 // Store a 32-bit offset into the header of the operand array.
3726 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3727
3728 // Read a bootstrap specifier.
3729 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3730 const u2 bootstrap_method_index = cfs->get_u2_fast();
3731 const u2 argument_count = cfs->get_u2_fast();
3732 check_property(
3733 valid_cp_range(bootstrap_method_index, cp_size) &&
3734 cp->tag_at(bootstrap_method_index).is_method_handle(),
3735 "bootstrap_method_index %u has bad constant type in class file %s",
3736 bootstrap_method_index,
3737 CHECK);
3738
3739 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3740 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3741 CHECK);
3742
3743 operands->at_put(operand_fill_index++, bootstrap_method_index);
3744 operands->at_put(operand_fill_index++, argument_count);
3745
3746 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3747 for (int j = 0; j < argument_count; j++) {
3748 const u2 argument_index = cfs->get_u2_fast();
3749 check_property(
3750 valid_cp_range(argument_index, cp_size) &&
3751 cp->tag_at(argument_index).is_loadable_constant(),
3752 "argument_index %u has bad constant type in class file %s",
3753 argument_index,
3754 CHECK);
3755 operands->at_put(operand_fill_index++, argument_index);
3756 }
3757 }
3758 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3759 "Bad length on BootstrapMethods in class file %s",
3760 CHECK);
3761 }
3762
3763 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3764 ConstantPool* cp,
3765 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3766 TRAPS) {
3767 assert(cfs != NULL, "invariant");
3768 assert(cp != NULL, "invariant");
3769 assert(parsed_annotations != NULL, "invariant");
3770
3771 // Set inner classes attribute to default sentinel
3772 _inner_classes = Universe::the_empty_short_array();
3773 // Set nest members attribute to default sentinel
3774 _nest_members = Universe::the_empty_short_array();
3775 // Set _permitted_subclasses attribute to default sentinel
3776 _permitted_subclasses = Universe::the_empty_short_array();
3777 // Set _preload_classes attribute to default sentinel
3778 _preload_classes = Universe::the_empty_short_array();
3779 cfs->guarantee_more(2, CHECK); // attributes_count
3780 u2 attributes_count = cfs->get_u2_fast();
3781 bool parsed_sourcefile_attribute = false;
3782 bool parsed_innerclasses_attribute = false;
3783 bool parsed_nest_members_attribute = false;
3784 bool parsed_permitted_subclasses_attribute = false;
3785 bool parsed_preload_attribute = false;
3786 bool parsed_nest_host_attribute = false;
3787 bool parsed_record_attribute = false;
3788 bool parsed_enclosingmethod_attribute = false;
3789 bool parsed_bootstrap_methods_attribute = false;
3790 const u1* runtime_visible_annotations = NULL;
3791 int runtime_visible_annotations_length = 0;
3792 const u1* runtime_invisible_annotations = NULL;
3793 int runtime_invisible_annotations_length = 0;
3794 const u1* runtime_visible_type_annotations = NULL;
3795 int runtime_visible_type_annotations_length = 0;
3796 const u1* runtime_invisible_type_annotations = NULL;
3797 int runtime_invisible_type_annotations_length = 0;
3798 bool runtime_invisible_type_annotations_exists = false;
3799 bool runtime_invisible_annotations_exists = false;
3800 bool parsed_source_debug_ext_annotations_exist = false;
3801 const u1* inner_classes_attribute_start = NULL;
3802 u4 inner_classes_attribute_length = 0;
3803 u2 enclosing_method_class_index = 0;
3804 u2 enclosing_method_method_index = 0;
3805 const u1* nest_members_attribute_start = NULL;
3806 u4 nest_members_attribute_length = 0;
3807 const u1* record_attribute_start = NULL;
3808 u4 record_attribute_length = 0;
3809 const u1* permitted_subclasses_attribute_start = NULL;
3810 u4 permitted_subclasses_attribute_length = 0;
3811 const u1* preload_attribute_start = NULL;
3812 u4 preload_attribute_length = 0;
3813
3814 // Iterate over attributes
3815 while (attributes_count--) {
3816 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3817 const u2 attribute_name_index = cfs->get_u2_fast();
3818 const u4 attribute_length = cfs->get_u4_fast();
3819 check_property(
3820 valid_symbol_at(attribute_name_index),
3821 "Attribute name has bad constant pool index %u in class file %s",
3822 attribute_name_index, CHECK);
3823 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3824 if (tag == vmSymbols::tag_source_file()) {
3825 // Check for SourceFile tag
3826 if (_need_verify) {
3827 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3828 }
3829 if (parsed_sourcefile_attribute) {
3830 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3831 return;
3832 } else {
3833 parsed_sourcefile_attribute = true;
3834 }
3835 parse_classfile_sourcefile_attribute(cfs, CHECK);
3836 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3837 // Check for SourceDebugExtension tag
3838 if (parsed_source_debug_ext_annotations_exist) {
3839 classfile_parse_error(
3840 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3841 return;
3842 }
3843 parsed_source_debug_ext_annotations_exist = true;
3844 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3845 } else if (tag == vmSymbols::tag_inner_classes()) {
3846 // Check for InnerClasses tag
3847 if (parsed_innerclasses_attribute) {
3848 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3849 return;
3850 } else {
3851 parsed_innerclasses_attribute = true;
3852 }
3853 inner_classes_attribute_start = cfs->current();
3854 inner_classes_attribute_length = attribute_length;
3855 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3856 } else if (tag == vmSymbols::tag_synthetic()) {
3857 // Check for Synthetic tag
3858 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3859 if (attribute_length != 0) {
3860 classfile_parse_error(
3861 "Invalid Synthetic classfile attribute length %u in class file %s",
3862 attribute_length, THREAD);
3863 return;
3864 }
3865 parse_classfile_synthetic_attribute();
3866 } else if (tag == vmSymbols::tag_deprecated()) {
3867 // Check for Deprecated tag - 4276120
3868 if (attribute_length != 0) {
3869 classfile_parse_error(
3870 "Invalid Deprecated classfile attribute length %u in class file %s",
3871 attribute_length, THREAD);
3872 return;
3873 }
3874 } else if (_major_version >= JAVA_1_5_VERSION) {
3875 if (tag == vmSymbols::tag_signature()) {
3876 if (_generic_signature_index != 0) {
3877 classfile_parse_error(
3878 "Multiple Signature attributes in class file %s", THREAD);
3879 return;
3880 }
3881 if (attribute_length != 2) {
3882 classfile_parse_error(
3883 "Wrong Signature attribute length %u in class file %s",
3884 attribute_length, THREAD);
3885 return;
3886 }
3887 parse_classfile_signature_attribute(cfs, CHECK);
3888 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3889 if (runtime_visible_annotations != NULL) {
3890 classfile_parse_error(
3891 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3892 return;
3893 }
3894 runtime_visible_annotations_length = attribute_length;
3895 runtime_visible_annotations = cfs->current();
3896 assert(runtime_visible_annotations != NULL, "null visible annotations");
3897 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3898 parse_annotations(cp,
3899 runtime_visible_annotations,
3900 runtime_visible_annotations_length,
3901 parsed_annotations,
3902 _loader_data,
3903 _can_access_vm_annotations);
3904 cfs->skip_u1_fast(runtime_visible_annotations_length);
3905 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3906 if (runtime_invisible_annotations_exists) {
3907 classfile_parse_error(
3908 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3909 return;
3910 }
3911 runtime_invisible_annotations_exists = true;
3912 if (PreserveAllAnnotations) {
3913 runtime_invisible_annotations_length = attribute_length;
3914 runtime_invisible_annotations = cfs->current();
3915 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3916 }
3917 cfs->skip_u1(attribute_length, CHECK);
3918 } else if (tag == vmSymbols::tag_enclosing_method()) {
3919 if (parsed_enclosingmethod_attribute) {
3920 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3921 return;
3922 } else {
3923 parsed_enclosingmethod_attribute = true;
3924 }
3925 guarantee_property(attribute_length == 4,
3926 "Wrong EnclosingMethod attribute length %u in class file %s",
3927 attribute_length, CHECK);
3928 cfs->guarantee_more(4, CHECK); // class_index, method_index
3929 enclosing_method_class_index = cfs->get_u2_fast();
3930 enclosing_method_method_index = cfs->get_u2_fast();
3931 if (enclosing_method_class_index == 0) {
3932 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3933 return;
3934 }
3935 // Validate the constant pool indices and types
3936 check_property(valid_klass_reference_at(enclosing_method_class_index),
3937 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3938 if (enclosing_method_method_index != 0 &&
3939 (!cp->is_within_bounds(enclosing_method_method_index) ||
3940 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3941 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3942 return;
3943 }
3944 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3945 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3946 if (parsed_bootstrap_methods_attribute) {
3947 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3948 return;
3949 }
3950 parsed_bootstrap_methods_attribute = true;
3951 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3952 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3953 if (runtime_visible_type_annotations != NULL) {
3954 classfile_parse_error(
3955 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3956 return;
3957 }
3958 runtime_visible_type_annotations_length = attribute_length;
3959 runtime_visible_type_annotations = cfs->current();
3960 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3961 // No need for the VM to parse Type annotations
3962 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3963 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3964 if (runtime_invisible_type_annotations_exists) {
3965 classfile_parse_error(
3966 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3967 return;
3968 } else {
3969 runtime_invisible_type_annotations_exists = true;
3970 }
3971 if (PreserveAllAnnotations) {
3972 runtime_invisible_type_annotations_length = attribute_length;
3973 runtime_invisible_type_annotations = cfs->current();
3974 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3975 }
3976 cfs->skip_u1(attribute_length, CHECK);
3977 } else if (_major_version >= JAVA_11_VERSION) {
3978 if (tag == vmSymbols::tag_nest_members()) {
3979 // Check for NestMembers tag
3980 if (parsed_nest_members_attribute) {
3981 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3982 return;
3983 } else {
3984 parsed_nest_members_attribute = true;
3985 }
3986 if (parsed_nest_host_attribute) {
3987 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3988 return;
3989 }
3990 nest_members_attribute_start = cfs->current();
3991 nest_members_attribute_length = attribute_length;
3992 cfs->skip_u1(nest_members_attribute_length, CHECK);
3993 } else if (tag == vmSymbols::tag_nest_host()) {
3994 if (parsed_nest_host_attribute) {
3995 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
3996 return;
3997 } else {
3998 parsed_nest_host_attribute = true;
3999 }
4000 if (parsed_nest_members_attribute) {
4001 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
4002 return;
4003 }
4004 if (_need_verify) {
4005 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
4006 }
4007 cfs->guarantee_more(2, CHECK);
4008 u2 class_info_index = cfs->get_u2_fast();
4009 check_property(
4010 valid_klass_reference_at(class_info_index),
4011 "Nest-host class_info_index %u has bad constant type in class file %s",
4012 class_info_index, CHECK);
4013 _nest_host = class_info_index;
4014
4015 } else if (_major_version >= JAVA_16_VERSION) {
4016 if (tag == vmSymbols::tag_record()) {
4017 if (parsed_record_attribute) {
4018 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
4019 return;
4020 }
4021 parsed_record_attribute = true;
4022 record_attribute_start = cfs->current();
4023 record_attribute_length = attribute_length;
4024 } else if (_major_version >= JAVA_17_VERSION) {
4025 if (tag == vmSymbols::tag_permitted_subclasses()) {
4026 if (parsed_permitted_subclasses_attribute) {
4027 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
4028 return;
4029 }
4030 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
4031 if (_access_flags.is_final()) {
4032 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
4033 return;
4034 }
4035 parsed_permitted_subclasses_attribute = true;
4036 permitted_subclasses_attribute_start = cfs->current();
4037 permitted_subclasses_attribute_length = attribute_length;
4038 }
4039 if (EnableValhalla && tag == vmSymbols::tag_preload()) {
4040 if (parsed_preload_attribute) {
4041 classfile_parse_error("Multiple Preload attributes in class file %s", CHECK);
4042 return;
4043 }
4044 parsed_preload_attribute = true;
4045 preload_attribute_start = cfs->current();
4046 preload_attribute_length = attribute_length;
4047 }
4048 }
4049 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
4050 cfs->skip_u1(attribute_length, CHECK);
4051 } else {
4052 // Unknown attribute
4053 cfs->skip_u1(attribute_length, CHECK);
4054 }
4055 } else {
4056 // Unknown attribute
4057 cfs->skip_u1(attribute_length, CHECK);
4058 }
4059 } else {
4060 // Unknown attribute
4061 cfs->skip_u1(attribute_length, CHECK);
4062 }
4063 }
4064 _class_annotations = assemble_annotations(runtime_visible_annotations,
4065 runtime_visible_annotations_length,
4066 runtime_invisible_annotations,
4067 runtime_invisible_annotations_length,
4068 CHECK);
4069 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
4070 runtime_visible_type_annotations_length,
4071 runtime_invisible_type_annotations,
4072 runtime_invisible_type_annotations_length,
4073 CHECK);
4074
4075 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
4076 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
4077 cfs,
4078 cp,
4079 inner_classes_attribute_start,
4080 parsed_innerclasses_attribute,
4081 enclosing_method_class_index,
4082 enclosing_method_method_index,
4083 CHECK);
4084 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
4085 guarantee_property(
4086 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
4087 "Wrong InnerClasses attribute length in class file %s", CHECK);
4088 }
4089 }
4090
4091 if (parsed_nest_members_attribute) {
4092 const u2 num_of_classes = parse_classfile_nest_members_attribute(
4093 cfs,
4094 nest_members_attribute_start,
4095 CHECK);
4096 if (_need_verify) {
4097 guarantee_property(
4098 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
4099 "Wrong NestMembers attribute length in class file %s", CHECK);
4100 }
4101 }
4102
4103 if (parsed_record_attribute) {
4104 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
4105 cfs,
4106 cp,
4107 record_attribute_start,
4108 CHECK);
4109 if (_need_verify) {
4110 guarantee_property(record_attribute_length == calculated_attr_length,
4111 "Record attribute has wrong length in class file %s",
4112 CHECK);
4113 }
4114 }
4115
4116 if (parsed_permitted_subclasses_attribute) {
4117 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
4118 cfs,
4119 permitted_subclasses_attribute_start,
4120 CHECK);
4121 if (_need_verify) {
4122 guarantee_property(
4123 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
4124 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
4125 }
4126 }
4127
4128 if (parsed_preload_attribute) {
4129 const u2 num_classes = parse_classfile_preload_attribute(
4130 cfs,
4131 preload_attribute_start,
4132 CHECK);
4133 if (_need_verify) {
4134 guarantee_property(
4135 preload_attribute_length == sizeof(num_classes) + sizeof(u2) * num_classes,
4136 "Wrong Preload attribute length in class file %s", CHECK);
4137 }
4138 }
4139
4140 if (_max_bootstrap_specifier_index >= 0) {
4141 guarantee_property(parsed_bootstrap_methods_attribute,
4142 "Missing BootstrapMethods attribute in class file %s", CHECK);
4143 }
4144 }
4145
4146 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
4147 assert(k != NULL, "invariant");
4148
4149 if (_synthetic_flag)
4150 k->set_is_synthetic();
4151 if (_sourcefile_index != 0) {
4152 k->set_source_file_name_index(_sourcefile_index);
4153 }
4154 if (_generic_signature_index != 0) {
4155 k->set_generic_signature_index(_generic_signature_index);
4156 }
4157 if (_sde_buffer != NULL) {
4158 k->set_source_debug_extension(_sde_buffer, _sde_length);
4159 }
4160 }
4161
4162 // Create the Annotations object that will
4163 // hold the annotations array for the Klass.
4164 void ClassFileParser::create_combined_annotations(TRAPS) {
4165 if (_class_annotations == NULL &&
4166 _class_type_annotations == NULL &&
4167 _fields_annotations == NULL &&
4168 _fields_type_annotations == NULL) {
4169 // Don't create the Annotations object unnecessarily.
4170 return;
4171 }
4172
4173 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
4174 annotations->set_class_annotations(_class_annotations);
4175 annotations->set_class_type_annotations(_class_type_annotations);
4176 annotations->set_fields_annotations(_fields_annotations);
4177 annotations->set_fields_type_annotations(_fields_type_annotations);
4178
4179 // This is the Annotations object that will be
4180 // assigned to InstanceKlass being constructed.
4181 _combined_annotations = annotations;
4182
4183 // The annotations arrays below has been transferred the
4184 // _combined_annotations so these fields can now be cleared.
4185 _class_annotations = NULL;
4186 _class_type_annotations = NULL;
4187 _fields_annotations = NULL;
4188 _fields_type_annotations = NULL;
4189 }
4190
4191 // Transfer ownership of metadata allocated to the InstanceKlass.
4192 void ClassFileParser::apply_parsed_class_metadata(
4193 InstanceKlass* this_klass,
4194 int java_fields_count) {
4195 assert(this_klass != NULL, "invariant");
4196
4197 _cp->set_pool_holder(this_klass);
4198 this_klass->set_constants(_cp);
4199 this_klass->set_fields(_fields, java_fields_count);
4200 this_klass->set_methods(_methods);
4201 this_klass->set_inner_classes(_inner_classes);
4202 this_klass->set_nest_members(_nest_members);
4203 this_klass->set_nest_host_index(_nest_host);
4204 this_klass->set_preload_classes(_preload_classes);
4205 this_klass->set_annotations(_combined_annotations);
4206 this_klass->set_permitted_subclasses(_permitted_subclasses);
4207 this_klass->set_record_components(_record_components);
4208 // Delay the setting of _local_interfaces and _transitive_interfaces until after
4209 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
4210 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
4211 // its _super. If an OOM occurs while loading the current klass, its _super field
4212 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
4213 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
4214 // dereferences to the deallocated _transitive_interfaces will result in a crash.
4215
4216 // Clear out these fields so they don't get deallocated by the destructor
4217 clear_class_metadata();
4218 }
4219
4220 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
4221 int runtime_visible_annotations_length,
4222 const u1* const runtime_invisible_annotations,
4223 int runtime_invisible_annotations_length,
4224 TRAPS) {
4225 AnnotationArray* annotations = NULL;
4226 if (runtime_visible_annotations != NULL ||
4227 runtime_invisible_annotations != NULL) {
4228 annotations = MetadataFactory::new_array<u1>(_loader_data,
4229 runtime_visible_annotations_length +
4230 runtime_invisible_annotations_length,
4231 CHECK_(annotations));
4232 if (runtime_visible_annotations != NULL) {
4233 for (int i = 0; i < runtime_visible_annotations_length; i++) {
4234 annotations->at_put(i, runtime_visible_annotations[i]);
4235 }
4236 }
4237 if (runtime_invisible_annotations != NULL) {
4238 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
4239 int append = runtime_visible_annotations_length+i;
4240 annotations->at_put(append, runtime_invisible_annotations[i]);
4241 }
4242 }
4243 }
4244 return annotations;
4245 }
4246
4247 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
4248 const int super_class_index,
4249 const bool need_verify,
4250 TRAPS) {
4251 assert(cp != NULL, "invariant");
4252 const InstanceKlass* super_klass = NULL;
4253
4254 if (super_class_index == 0) {
4255 check_property(_class_name == vmSymbols::java_lang_Object(),
4256 "Invalid superclass index 0 in class file %s",
4257 CHECK_NULL);
4258 } else {
4259 check_property(valid_klass_reference_at(super_class_index),
4260 "Invalid superclass index %u in class file %s",
4261 super_class_index,
4262 CHECK_NULL);
4263 // The class name should be legal because it is checked when parsing constant pool.
4264 // However, make sure it is not an array type.
4265 if (cp->tag_at(super_class_index).is_klass()) {
4266 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
4267 }
4268 if (need_verify) {
4269 bool is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
4270 guarantee_property(!is_array,
4271 "Bad superclass name in class file %s", CHECK_NULL);
4272 }
4273 }
4274 return super_klass;
4275 }
4276
4277 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
4278 _max_nonstatic_oop_maps = max_blocks;
4279 _nonstatic_oop_map_count = 0;
4280 if (max_blocks == 0) {
4281 _nonstatic_oop_maps = NULL;
4282 } else {
4283 _nonstatic_oop_maps =
4284 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
4285 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
4286 }
4287 }
4288
4289 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
4290 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
4291 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
4292 }
4293
4294 // addition of super oop maps
4295 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
4296 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
4297 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
4298
4299 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
4300 _nonstatic_oop_map_count += nof_blocks;
4301 }
4302
4303 // collection of oops
4304 void OopMapBlocksBuilder::add(int offset, int count) {
4305 if (_nonstatic_oop_map_count == 0) {
4306 _nonstatic_oop_map_count++;
4307 }
4308 OopMapBlock* nonstatic_oop_map = last_oop_map();
4309 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
4310 nonstatic_oop_map->set_offset(offset);
4311 nonstatic_oop_map->set_count(count);
4312 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
4313 nonstatic_oop_map->increment_count(count);
4314 } else { // Need a new one...
4315 _nonstatic_oop_map_count++;
4316 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
4317 nonstatic_oop_map = last_oop_map();
4318 nonstatic_oop_map->set_offset(offset);
4319 nonstatic_oop_map->set_count(count);
4320 }
4321 }
4322
4323 // general purpose copy, e.g. into allocated instanceKlass
4324 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
4325 if (_nonstatic_oop_map_count != 0) {
4326 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
4327 }
4328 }
4329
4330 // Sort and compact adjacent blocks
4331 void OopMapBlocksBuilder::compact() {
4332 if (_nonstatic_oop_map_count <= 1) {
4333 return;
4334 }
4335 /*
4336 * Since field layout sneaks in oops before values, we will be able to condense
4337 * blocks. There is potential to compact between super, own refs and values
4338 * containing refs.
4339 *
4340 * Currently compaction is slightly limited due to values being 8 byte aligned.
4341 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
4342 * and maybe it doesn't need to be.
4343 */
4344 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
4345 (_sort_Fn)OopMapBlock::compare_offset);
4346 if (_nonstatic_oop_map_count < 2) {
4347 return;
4348 }
4349
4350 // Make a temp copy, and iterate through and copy back into the original
4351 ResourceMark rm;
4352 OopMapBlock* oop_maps_copy =
4353 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
4354 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
4355 copy(oop_maps_copy);
4356 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
4357 unsigned int new_count = 1;
4358 oop_maps_copy++;
4359 while(oop_maps_copy < oop_maps_copy_end) {
4360 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
4361 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
4362 nonstatic_oop_map->increment_count(oop_maps_copy->count());
4363 } else {
4364 nonstatic_oop_map++;
4365 new_count++;
4366 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
4367 nonstatic_oop_map->set_count(oop_maps_copy->count());
4368 }
4369 oop_maps_copy++;
4370 }
4371 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
4372 _nonstatic_oop_map_count = new_count;
4373 }
4374
4375 void OopMapBlocksBuilder::print_on(outputStream* st) const {
4376 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
4377 if (_nonstatic_oop_map_count > 0) {
4378 OopMapBlock* map = _nonstatic_oop_maps;
4379 OopMapBlock* last_map = last_oop_map();
4380 assert(map <= last_map, "Last less than first");
4381 while (map <= last_map) {
4382 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
4383 map->offset() + map->offset_span() - heapOopSize, map->count());
4384 map++;
4385 }
4386 }
4387 }
4388
4389 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
4390 print_on(st);
4391 }
4392
4393 void ClassFileParser::throwInlineTypeLimitation(THREAD_AND_LOCATION_DECL,
4394 const char* msg,
4395 const Symbol* name,
4396 const Symbol* sig) const {
4397
4398 ResourceMark rm(THREAD);
4399 if (name == NULL || sig == NULL) {
4400 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4401 vmSymbols::java_lang_ClassFormatError(),
4402 "class: %s - %s", _class_name->as_C_string(), msg);
4403 }
4404 else {
4405 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4406 vmSymbols::java_lang_ClassFormatError(),
4407 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
4408 _class_name->as_C_string(), msg);
4409 }
4410 }
4411
4412 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4413 assert(ik != NULL, "invariant");
4414
4415 const Klass* const super = ik->super();
4416
4417 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4418 // in which case we don't have to register objects as finalizable
4419 if (!_has_empty_finalizer) {
4420 if (_has_finalizer ||
4421 (super != NULL && super->has_finalizer())) {
4422 ik->set_has_finalizer();
4423 }
4424 }
4425
4426 #ifdef ASSERT
4427 bool f = false;
4428 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4429 vmSymbols::void_method_signature());
4430 if (InstanceKlass::is_finalization_enabled() &&
4431 (m != NULL) && !m->is_empty_method()) {
4432 f = true;
4433 }
4434
4435 // Spec doesn't prevent agent from redefinition of empty finalizer.
4436 // Despite the fact that it's generally bad idea and redefined finalizer
4437 // will not work as expected we shouldn't abort vm in this case
4438 if (!ik->has_redefined_this_or_super()) {
4439 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4440 }
4441 #endif
4442
4443 // Check if this klass supports the java.lang.Cloneable interface
4444 if (vmClasses::Cloneable_klass_loaded()) {
4445 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
4446 if (ik->is_inline_klass()) {
4447 JavaThread *THREAD = JavaThread::current();
4448 throwInlineTypeLimitation(THREAD_AND_LOCATION, "Inline Types do not support Cloneable");
4449 return;
4450 }
4451 ik->set_is_cloneable();
4452 }
4453 }
4454
4455 // Check if this klass has a vanilla default constructor
4456 if (super == NULL) {
4457 // java.lang.Object has empty default constructor
4458 ik->set_has_vanilla_constructor();
4459 } else {
4460 if (super->has_vanilla_constructor() &&
4461 _has_vanilla_constructor) {
4462 ik->set_has_vanilla_constructor();
4463 }
4464 #ifdef ASSERT
4465 bool v = false;
4466 if (super->has_vanilla_constructor()) {
4467 const Method* const constructor =
4468 ik->find_method(vmSymbols::object_initializer_name(),
4469 vmSymbols::void_method_signature());
4470 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4471 v = true;
4472 }
4473 }
4474 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4475 #endif
4476 }
4477
4478 // If it cannot be fast-path allocated, set a bit in the layout helper.
4479 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4480 assert(ik->size_helper() > 0, "layout_helper is initialized");
4481 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4482 || ik->is_abstract() || ik->is_interface()
4483 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4484 || ik->size_helper() >= FastAllocateSizeLimit) {
4485 // Forbid fast-path allocation.
4486 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4487 ik->set_layout_helper(lh);
4488 }
4489 }
4490
4491 bool ClassFileParser::supports_inline_types() const {
4492 // Inline types are only supported by class file version 61.65535 and later
4493 return _major_version > JAVA_21_VERSION ||
4494 (_major_version == JAVA_21_VERSION /*&& _minor_version == JAVA_PREVIEW_MINOR_VERSION*/); // JAVA_PREVIEW_MINOR_VERSION not yet implemented by javac, check JVMS draft
4495 }
4496
4497 // utility methods for appending an array with check for duplicates
4498
4499 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4500 const Array<InstanceKlass*>* const ifs) {
4501 // iterate over new interfaces
4502 for (int i = 0; i < ifs->length(); i++) {
4503 InstanceKlass* const e = ifs->at(i);
4504 assert(e->is_klass() && e->is_interface(), "just checking");
4505 // add new interface
4506 result->append_if_missing(e);
4507 }
4508 }
4509
4510 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4511 Array<InstanceKlass*>* local_ifs,
4512 ClassLoaderData* loader_data,
4513 TRAPS) {
4514 assert(local_ifs != NULL, "invariant");
4515 assert(loader_data != NULL, "invariant");
4516
4517 // Compute maximum size for transitive interfaces
4518 int max_transitive_size = 0;
4519 int super_size = 0;
4520 // Add superclass transitive interfaces size
4521 if (super != NULL) {
4522 super_size = super->transitive_interfaces()->length();
4523 max_transitive_size += super_size;
4524 }
4525 // Add local interfaces' super interfaces
4526 const int local_size = local_ifs->length();
4527 for (int i = 0; i < local_size; i++) {
4528 InstanceKlass* const l = local_ifs->at(i);
4529 max_transitive_size += l->transitive_interfaces()->length();
4530 }
4531 // Finally add local interfaces
4532 max_transitive_size += local_size;
4533 // Construct array
4534 if (max_transitive_size == 0) {
4535 // no interfaces, use canonicalized array
4536 return Universe::the_empty_instance_klass_array();
4537 } else if (max_transitive_size == super_size) {
4538 // no new local interfaces added, share superklass' transitive interface array
4539 return super->transitive_interfaces();
4540 // The three lines below are commented to work around bug JDK-8245487
4541 // } else if (max_transitive_size == local_size) {
4542 // // only local interfaces added, share local interface array
4543 // return local_ifs;
4544 } else {
4545 ResourceMark rm;
4546 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4547
4548 // Copy down from superclass
4549 if (super != NULL) {
4550 append_interfaces(result, super->transitive_interfaces());
4551 }
4552
4553 // Copy down from local interfaces' superinterfaces
4554 for (int i = 0; i < local_size; i++) {
4555 InstanceKlass* const l = local_ifs->at(i);
4556 append_interfaces(result, l->transitive_interfaces());
4557 }
4558 // Finally add local interfaces
4559 append_interfaces(result, local_ifs);
4560
4561 // length will be less than the max_transitive_size if duplicates were removed
4562 const int length = result->length();
4563 assert(length <= max_transitive_size, "just checking");
4564
4565 Array<InstanceKlass*>* const new_result =
4566 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4567 for (int i = 0; i < length; i++) {
4568 InstanceKlass* const e = result->at(i);
4569 assert(e != NULL, "just checking");
4570 new_result->at_put(i, e);
4571 }
4572 return new_result;
4573 }
4574 }
4575
4576 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4577 assert(this_klass != NULL, "invariant");
4578 const Klass* const super = this_klass->super();
4579
4580 if (super != NULL) {
4581 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4582
4583 if (super->is_final()) {
4584 classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4585 return;
4586 }
4587
4588 if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4589 classfile_icce_error("class %s cannot inherit from sealed class %s", super_ik, THREAD);
4590 return;
4591 }
4592
4593 // The JVMS says that super classes for value types must not have the ACC_IDENTITY
4594 // flag set. But, java.lang.Object must still be allowed to be a direct super class
4595 // for a value classes. So, it is treated as a special case for now.
4596 if (this_klass->access_flags().is_value_class() &&
4597 super_ik->name() != vmSymbols::java_lang_Object() &&
4598 super_ik->is_identity_class()) {
4599 classfile_icce_error("value class %s cannot inherit from class %s", super_ik, THREAD);
4600 return;
4601 }
4602
4603 // If the loader is not the boot loader then throw an exception if its
4604 // superclass is in package jdk.internal.reflect and its loader is not a
4605 // special reflection class loader
4606 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4607 PackageEntry* super_package = super->package();
4608 if (super_package != NULL &&
4609 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4610 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4611 ResourceMark rm(THREAD);
4612 Exceptions::fthrow(
4613 THREAD_AND_LOCATION,
4614 vmSymbols::java_lang_IllegalAccessError(),
4615 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4616 this_klass->external_name(),
4617 this_klass->class_loader_data()->loader_name_and_id(),
4618 super->external_name());
4619 return;
4620 }
4621 }
4622
4623 Reflection::VerifyClassAccessResults vca_result =
4624 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4625 if (vca_result != Reflection::ACCESS_OK) {
4626 ResourceMark rm(THREAD);
4627 char* msg = Reflection::verify_class_access_msg(this_klass,
4628 InstanceKlass::cast(super),
4629 vca_result);
4630 if (msg == NULL) {
4631 bool same_module = (this_klass->module() == super->module());
4632 Exceptions::fthrow(
4633 THREAD_AND_LOCATION,
4634 vmSymbols::java_lang_IllegalAccessError(),
4635 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4636 this_klass->external_name(),
4637 super->is_abstract() ? "abstract " : "",
4638 super->external_name(),
4639 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4640 (same_module) ? "" : "; ",
4641 (same_module) ? "" : super->class_in_module_of_loader());
4642 } else {
4643 // Add additional message content.
4644 Exceptions::fthrow(
4645 THREAD_AND_LOCATION,
4646 vmSymbols::java_lang_IllegalAccessError(),
4647 "superclass access check failed: %s",
4648 msg);
4649 }
4650 }
4651 }
4652 }
4653
4654
4655 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4656 assert(this_klass != NULL, "invariant");
4657 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4658 const int lng = local_interfaces->length();
4659 for (int i = lng - 1; i >= 0; i--) {
4660 InstanceKlass* const k = local_interfaces->at(i);
4661 assert (k != NULL && k->is_interface(), "invalid interface");
4662
4663 if (k->is_sealed() && !k->has_as_permitted_subclass(this_klass)) {
4664 classfile_icce_error(this_klass->is_interface() ?
4665 "class %s cannot extend sealed interface %s" :
4666 "class %s cannot implement sealed interface %s",
4667 k, THREAD);
4668 return;
4669 }
4670
4671 Reflection::VerifyClassAccessResults vca_result =
4672 Reflection::verify_class_access(this_klass, k, false);
4673 if (vca_result != Reflection::ACCESS_OK) {
4674 ResourceMark rm(THREAD);
4675 char* msg = Reflection::verify_class_access_msg(this_klass,
4676 k,
4677 vca_result);
4678 if (msg == NULL) {
4679 bool same_module = (this_klass->module() == k->module());
4680 Exceptions::fthrow(
4681 THREAD_AND_LOCATION,
4682 vmSymbols::java_lang_IllegalAccessError(),
4683 "class %s cannot access its superinterface %s (%s%s%s)",
4684 this_klass->external_name(),
4685 k->external_name(),
4686 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4687 (same_module) ? "" : "; ",
4688 (same_module) ? "" : k->class_in_module_of_loader());
4689 } else {
4690 // Add additional message content.
4691 Exceptions::fthrow(
4692 THREAD_AND_LOCATION,
4693 vmSymbols::java_lang_IllegalAccessError(),
4694 "superinterface check failed: %s",
4695 msg);
4696 }
4697 }
4698 }
4699 }
4700
4701
4702 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4703 assert(this_klass != NULL, "invariant");
4704 const Array<Method*>* const methods = this_klass->methods();
4705 const int num_methods = methods->length();
4706
4707 // go thru each method and check if it overrides a final method
4708 for (int index = 0; index < num_methods; index++) {
4709 const Method* const m = methods->at(index);
4710
4711 // skip private, static, and <init> methods
4712 if ((!m->is_private() && !m->is_static()) &&
4713 (m->name() != vmSymbols::object_initializer_name())) {
4714
4715 const Symbol* const name = m->name();
4716 const Symbol* const signature = m->signature();
4717 const Klass* k = this_klass->super();
4718 const Method* super_m = NULL;
4719 while (k != NULL) {
4720 // skip supers that don't have final methods.
4721 if (k->has_final_method()) {
4722 // lookup a matching method in the super class hierarchy
4723 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4724 if (super_m == NULL) {
4725 break; // didn't find any match; get out
4726 }
4727
4728 if (super_m->is_final() && !super_m->is_static() &&
4729 !super_m->access_flags().is_private()) {
4730 // matching method in super is final, and not static or private
4731 bool can_access = Reflection::verify_member_access(this_klass,
4732 super_m->method_holder(),
4733 super_m->method_holder(),
4734 super_m->access_flags(),
4735 false, false, CHECK);
4736 if (can_access) {
4737 // this class can access super final method and therefore override
4738 ResourceMark rm(THREAD);
4739 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4740 err_msg("class %s overrides final method %s.%s%s",
4741 this_klass->external_name(),
4742 super_m->method_holder()->external_name(),
4743 name->as_C_string(),
4744 signature->as_C_string()));
4745 }
4746 }
4747
4748 // continue to look from super_m's holder's super.
4749 k = super_m->method_holder()->super();
4750 continue;
4751 }
4752
4753 k = k->super();
4754 }
4755 }
4756 }
4757 }
4758
4759
4760 // assumes that this_klass is an interface
4761 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4762 assert(this_klass != NULL, "invariant");
4763 assert(this_klass->is_interface(), "not an interface");
4764 const Array<Method*>* methods = this_klass->methods();
4765 const int num_methods = methods->length();
4766
4767 for (int index = 0; index < num_methods; index++) {
4768 const Method* const m = methods->at(index);
4769 // if m is static and not the init method, throw a verify error
4770 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4771 ResourceMark rm(THREAD);
4772 Exceptions::fthrow(
4773 THREAD_AND_LOCATION,
4774 vmSymbols::java_lang_VerifyError(),
4775 "Illegal static method %s in interface %s",
4776 m->name()->as_C_string(),
4777 this_klass->external_name()
4778 );
4779 return;
4780 }
4781 }
4782 }
4783
4784 // utility methods for format checking
4785
4786 void ClassFileParser::verify_legal_class_modifiers(jint flags, const char* name, bool is_Object, TRAPS) const {
4787 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4788 const bool is_value_class = (flags & JVM_ACC_VALUE) != 0;
4789 const bool is_primitive_class = (flags & JVM_ACC_PRIMITIVE) != 0;
4790 const bool is_identity_class = (flags & JVM_ACC_IDENTITY) != 0;
4791 const bool is_inner_class = name != NULL;
4792 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4793 if (is_module) {
4794 ResourceMark rm(THREAD);
4795 Exceptions::fthrow(
4796 THREAD_AND_LOCATION,
4797 vmSymbols::java_lang_NoClassDefFoundError(),
4798 "%s is not a class because access_flag ACC_MODULE is set",
4799 _class_name->as_C_string());
4800 return;
4801 }
4802
4803 if (is_value_class && !EnableValhalla) {
4804 ResourceMark rm(THREAD);
4805 Exceptions::fthrow(
4806 THREAD_AND_LOCATION,
4807 vmSymbols::java_lang_ClassFormatError(),
4808 "Class modifier ACC_VALUE in class %s requires option -XX:+EnableValhalla",
4809 _class_name->as_C_string()
4810 );
4811 return;
4812 }
4813
4814 if (is_primitive_class && !EnablePrimitiveClasses) {
4815 ResourceMark rm(THREAD);
4816 Exceptions::fthrow(
4817 THREAD_AND_LOCATION,
4818 vmSymbols::java_lang_ClassFormatError(),
4819 "Class modifier ACC_PRIMITIVE in class %s requires option -XX:+EnablePrimitiveClasses",
4820 _class_name->as_C_string()
4821 );
4822 return;
4823 }
4824
4825 // if (!_need_verify) { return; }
4826
4827 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4828 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4829 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4830 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4831 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4832 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4833 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4834
4835 if ((is_abstract && is_final) ||
4836 (is_interface && !is_abstract) ||
4837 (is_interface && major_gte_1_5 && ((is_super && (!EnableValhalla || !supports_inline_types())) || is_enum)) || // ACC_SUPER (now ACC_IDENTITY) was illegal for interfaces
4838 (!is_interface && major_gte_1_5 && is_annotation) ||
4839 (is_value_class && is_enum) ||
4840 (is_identity_class && is_value_class) ||
4841 (EnableValhalla && supports_inline_types() && !is_module && !is_abstract && !is_Object && !(is_identity_class || is_value_class) && !is_inner_class) ||
4842 (EnablePrimitiveClasses && supports_inline_types() && is_primitive_class && (!is_value_class || !is_final || is_interface || is_abstract))) {
4843 ResourceMark rm(THREAD);
4844 const char* class_note = "";
4845 if (is_value_class) class_note = " (a value class)";
4846 if (is_primitive_class) class_note = " (a primitive class)";
4847 if (is_value_class && is_identity_class) class_note = " (a value and identity class)";
4848 if (name == NULL) { // Not an inner class
4849 Exceptions::fthrow(
4850 THREAD_AND_LOCATION,
4851 vmSymbols::java_lang_ClassFormatError(),
4852 "Illegal class modifiers in class %s%s: 0x%X",
4853 _class_name->as_C_string(), class_note, flags
4854 );
4855 return;
4856 } else {
4857 Exceptions::fthrow(
4858 THREAD_AND_LOCATION,
4859 vmSymbols::java_lang_ClassFormatError(),
4860 "Illegal class modifiers in declaration of inner class %s%s of class %s: 0x%X",
4861 name, class_note, _class_name->as_C_string(), flags
4862 );
4863 return;
4864 }
4865 }
4866 }
4867
4868 static bool has_illegal_visibility(jint flags) {
4869 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4870 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4871 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4872
4873 return ((is_public && is_protected) ||
4874 (is_public && is_private) ||
4875 (is_protected && is_private));
4876 }
4877
4878 // A legal major_version.minor_version must be one of the following:
4879 //
4880 // Major_version >= 45 and major_version < 56, any minor_version.
4881 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4882 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4883 //
4884 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4885 ResourceMark rm(THREAD);
4886 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4887 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4888 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4889 class_name, major, minor, THREAD);
4890 return;
4891 }
4892
4893 if (major > max_version) {
4894 Exceptions::fthrow(
4895 THREAD_AND_LOCATION,
4896 vmSymbols::java_lang_UnsupportedClassVersionError(),
4897 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4898 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4899 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4900 return;
4901 }
4902
4903 if (major < JAVA_12_VERSION || minor == 0) {
4904 return;
4905 }
4906
4907 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4908 if (major != max_version) {
4909 Exceptions::fthrow(
4910 THREAD_AND_LOCATION,
4911 vmSymbols::java_lang_UnsupportedClassVersionError(),
4912 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4913 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4914 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4915 return;
4916 }
4917
4918 if (!Arguments::enable_preview()) {
4919 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4920 class_name, major, minor, THREAD);
4921 return;
4922 }
4923
4924 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4925 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4926 class_name, major, minor, THREAD);
4927 }
4928 }
4929
4930 void ClassFileParser:: verify_legal_field_modifiers(jint flags,
4931 AccessFlags class_access_flags,
4932 TRAPS) const {
4933 if (!_need_verify) { return; }
4934
4935 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4936 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4937 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4938 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4939 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4940 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4941 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4942 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4943 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4944
4945 const bool is_interface = class_access_flags.is_interface();
4946 const bool is_abstract = class_access_flags.is_abstract();
4947 const bool is_value_class = class_access_flags.is_value_class();
4948 const bool is_identity_class = class_access_flags.is_identity_class();
4949
4950 bool is_illegal = false;
4951
4952 if (is_interface) {
4953 if (!is_public || !is_static || !is_final || is_private ||
4954 is_protected || is_volatile || is_transient ||
4955 (major_gte_1_5 && is_enum)) {
4956 is_illegal = true;
4957 }
4958 } else { // not interface
4959 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4960 is_illegal = true;
4961 } else {
4962 if (is_value_class && !is_abstract && !is_static && !is_final) {
4963 is_illegal = true;
4964 } else if (is_abstract && !is_identity_class && !is_static) {
4965 is_illegal = true;
4966 }
4967 }
4968 }
4969
4970 if (is_illegal) {
4971 ResourceMark rm(THREAD);
4972 Exceptions::fthrow(
4973 THREAD_AND_LOCATION,
4974 vmSymbols::java_lang_ClassFormatError(),
4975 "Illegal field modifiers in class %s: 0x%X",
4976 _class_name->as_C_string(), flags);
4977 return;
4978 }
4979 }
4980
4981 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4982 AccessFlags class_access_flags,
4983 const Symbol* name,
4984 TRAPS) const {
4985 if (!_need_verify) { return; }
4986
4987 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4988 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4989 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4990 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4991 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4992 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4993 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4994 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4995 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4996 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4997 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4998 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4999 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
5000 const bool is_initializer = (name == vmSymbols::object_initializer_name());
5001 const bool is_factory = (name == vmSymbols::inline_factory_name() && supports_inline_types());
5002 const bool is_interface = class_access_flags.is_interface();
5003 const bool is_value_class = class_access_flags.is_value_class();
5004 const bool is_identity_class = class_access_flags.is_identity_class();
5005 const bool is_abstract_class = class_access_flags.is_abstract();
5006
5007 bool is_illegal = false;
5008
5009 const char* class_note = "";
5010 if (is_interface) {
5011 if (major_gte_8) {
5012 // Class file version is JAVA_8_VERSION or later Methods of
5013 // interfaces may set any of the flags except ACC_PROTECTED,
5014 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
5015 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
5016 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
5017 (is_native || is_protected || is_final || is_synchronized) ||
5018 // If a specific method of a class or interface has its
5019 // ACC_ABSTRACT flag set, it must not have any of its
5020 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
5021 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
5022 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
5023 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
5024 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
5025 is_illegal = true;
5026 }
5027 } else if (major_gte_1_5) {
5028 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
5029 if (!is_public || is_private || is_protected || is_static || is_final ||
5030 is_synchronized || is_native || !is_abstract || is_strict) {
5031 is_illegal = true;
5032 }
5033 } else {
5034 // Class file version is pre-JAVA_1_5_VERSION
5035 if (!is_public || is_static || is_final || is_native || !is_abstract) {
5036 is_illegal = true;
5037 }
5038 }
5039 } else { // not interface
5040 if (has_illegal_visibility(flags)) {
5041 is_illegal = true;
5042 } else {
5043 if (is_factory) { // <vnew> factory method
5044 if (is_final || is_synchronized || is_native || !is_static ||
5045 is_abstract || is_bridge) {
5046 is_illegal = true;
5047 class_note = (is_value_class ? " (a value class)" : " (not a value class)");
5048 }
5049 } else if (is_initializer) {
5050 if (is_static || is_final || is_synchronized || is_native ||
5051 is_abstract || (major_gte_1_5 && is_bridge)) {
5052 is_illegal = true;
5053 }
5054 } else { // not initializer
5055 if (!is_identity_class && is_synchronized && !is_static) {
5056 is_illegal = true;
5057 class_note = " (not an identity class)";
5058 } else {
5059 if (is_abstract) {
5060 if ((is_final || is_native || is_private || is_static ||
5061 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
5062 is_illegal = true;
5063 }
5064 }
5065 }
5066 }
5067 }
5068 }
5069
5070 if (is_illegal) {
5071 ResourceMark rm(THREAD);
5072 if (is_value_class && is_initializer) {
5073 Exceptions::fthrow(
5074 THREAD_AND_LOCATION,
5075 vmSymbols::java_lang_ClassFormatError(),
5076 "Method <init> is not allowed in value class %s",
5077 _class_name->as_C_string());
5078 } else {
5079 Exceptions::fthrow(
5080 THREAD_AND_LOCATION,
5081 vmSymbols::java_lang_ClassFormatError(),
5082 "Method %s in class %s%s has illegal modifiers: 0x%X",
5083 name->as_C_string(), _class_name->as_C_string(),
5084 class_note, flags);
5085 }
5086 return;
5087 }
5088 }
5089
5090 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5091 int length,
5092 TRAPS) const {
5093 assert(_need_verify, "only called when _need_verify is true");
5094 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5095 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
5096 }
5097 }
5098
5099 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5100 // In class names, '/' separates unqualified names. This is verified in this function also.
5101 // Method names also may not contain the characters '<' or '>', unless <init>
5102 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5103 // method. Because these names have been checked as special cases before
5104 // calling this method in verify_legal_method_name.
5105 //
5106 // This method is also called from the modular system APIs in modules.cpp
5107 // to verify the validity of module and package names.
5108 bool ClassFileParser::verify_unqualified_name(const char* name,
5109 unsigned int length,
5110 int type) {
5111 if (length == 0) return false; // Must have at least one char.
5112 for (const char* p = name; p != name + length; p++) {
5113 switch(*p) {
5114 case JVM_SIGNATURE_DOT:
5115 case JVM_SIGNATURE_ENDCLASS:
5116 case JVM_SIGNATURE_ARRAY:
5117 // do not permit '.', ';', or '['
5118 return false;
5119 case JVM_SIGNATURE_SLASH:
5120 // check for '//' or leading or trailing '/' which are not legal
5121 // unqualified name must not be empty
5122 if (type == ClassFileParser::LegalClass) {
5123 if (p == name || p+1 >= name+length ||
5124 *(p+1) == JVM_SIGNATURE_SLASH) {
5125 return false;
5126 }
5127 } else {
5128 return false; // do not permit '/' unless it's class name
5129 }
5130 break;
5131 case JVM_SIGNATURE_SPECIAL:
5132 case JVM_SIGNATURE_ENDSPECIAL:
5133 // do not permit '<' or '>' in method names
5134 if (type == ClassFileParser::LegalMethod) {
5135 return false;
5136 }
5137 }
5138 }
5139 return true;
5140 }
5141
5142 // Take pointer to a UTF8 byte string (not NUL-terminated).
5143 // Skip over the longest part of the string that could
5144 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
5145 // Return a pointer to just past the fieldname.
5146 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5147 // being true, we saw consecutive slashes (meaning we were looking for a
5148 // qualified path but found something that was badly-formed).
5149 static const char* skip_over_field_name(const char* const name,
5150 bool slash_ok,
5151 unsigned int length) {
5152 const char* p;
5153 jboolean last_is_slash = false;
5154 jboolean not_first_ch = false;
5155
5156 for (p = name; p != name + length; not_first_ch = true) {
5157 const char* old_p = p;
5158 jchar ch = *p;
5159 if (ch < 128) {
5160 p++;
5161 // quick check for ascii
5162 if ((ch >= 'a' && ch <= 'z') ||
5163 (ch >= 'A' && ch <= 'Z') ||
5164 (ch == '_' || ch == '$') ||
5165 (not_first_ch && ch >= '0' && ch <= '9')) {
5166 last_is_slash = false;
5167 continue;
5168 }
5169 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
5170 if (last_is_slash) {
5171 return NULL; // Don't permit consecutive slashes
5172 }
5173 last_is_slash = true;
5174 continue;
5175 }
5176 }
5177 else {
5178 jint unicode_ch;
5179 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5180 p = tmp_p;
5181 last_is_slash = false;
5182 // Check if ch is Java identifier start or is Java identifier part
5183 // 4672820: call java.lang.Character methods directly without generating separate tables.
5184 EXCEPTION_MARK;
5185 // return value
5186 JavaValue result(T_BOOLEAN);
5187 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5188 JavaCallArguments args;
5189 args.push_int(unicode_ch);
5190
5191 if (not_first_ch) {
5192 // public static boolean isJavaIdentifierPart(char ch);
5193 JavaCalls::call_static(&result,
5194 vmClasses::Character_klass(),
5195 vmSymbols::isJavaIdentifierPart_name(),
5196 vmSymbols::int_bool_signature(),
5197 &args,
5198 THREAD);
5199 } else {
5200 // public static boolean isJavaIdentifierStart(char ch);
5201 JavaCalls::call_static(&result,
5202 vmClasses::Character_klass(),
5203 vmSymbols::isJavaIdentifierStart_name(),
5204 vmSymbols::int_bool_signature(),
5205 &args,
5206 THREAD);
5207 }
5208 if (HAS_PENDING_EXCEPTION) {
5209 CLEAR_PENDING_EXCEPTION;
5210 return NULL;
5211 }
5212 if(result.get_jboolean()) {
5213 continue;
5214 }
5215 }
5216 return (not_first_ch) ? old_p : NULL;
5217 }
5218 return (not_first_ch && !last_is_slash) ? p : NULL;
5219 }
5220
5221 // Take pointer to a UTF8 byte string (not NUL-terminated).
5222 // Skip over the longest part of the string that could
5223 // be taken as a field signature. Allow "void" if void_ok.
5224 // Return a pointer to just past the signature.
5225 // Return NULL if no legal signature is found.
5226 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5227 bool void_ok,
5228 unsigned int length,
5229 TRAPS) const {
5230 unsigned int array_dim = 0;
5231 while (length > 0) {
5232 switch (signature[0]) {
5233 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5234 case JVM_SIGNATURE_BOOLEAN:
5235 case JVM_SIGNATURE_BYTE:
5236 case JVM_SIGNATURE_CHAR:
5237 case JVM_SIGNATURE_SHORT:
5238 case JVM_SIGNATURE_INT:
5239 case JVM_SIGNATURE_FLOAT:
5240 case JVM_SIGNATURE_LONG:
5241 case JVM_SIGNATURE_DOUBLE:
5242 return signature + 1;
5243 case JVM_SIGNATURE_PRIMITIVE_OBJECT:
5244 // Can't enable this check fully until JDK upgrades the bytecode generators (TODO: JDK-8270852).
5245 // For now, compare to class file version 51 so old verifier doesn't see Q signatures.
5246 if ( (_major_version < 51 /* CONSTANT_CLASS_DESCRIPTORS */ ) || (!EnablePrimitiveClasses)) {
5247 classfile_parse_error("Class name contains illegal Q-signature "
5248 "in descriptor in class file %s, requires option -XX:+EnablePrimitiveClasses",
5249 CHECK_0);
5250 return NULL;
5251 }
5252 // fall through
5253 case JVM_SIGNATURE_CLASS:
5254 {
5255 if (_major_version < JAVA_1_5_VERSION) {
5256 // Skip over the class name if one is there
5257 const char* const p = skip_over_field_name(signature + 1, true, --length);
5258
5259 // The next character better be a semicolon
5260 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5261 return p + 1;
5262 }
5263 }
5264 else {
5265 // Skip leading 'L' or 'Q' and ignore first appearance of ';'
5266 signature++;
5267 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5268 // Format check signature
5269 if (c != NULL) {
5270 int newlen = c - (char*) signature;
5271 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5272 if (!legal) {
5273 classfile_parse_error("Class name is empty or contains illegal character "
5274 "in descriptor in class file %s",
5275 THREAD);
5276 return NULL;
5277 }
5278 return signature + newlen + 1;
5279 }
5280 }
5281 return NULL;
5282 }
5283 case JVM_SIGNATURE_ARRAY:
5284 array_dim++;
5285 if (array_dim > 255) {
5286 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5287 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
5288 return NULL;
5289 }
5290 // The rest of what's there better be a legal signature
5291 signature++;
5292 length--;
5293 void_ok = false;
5294 break;
5295 default:
5296 return NULL;
5297 }
5298 }
5299 return NULL;
5300 }
5301
5302 // Checks if name is a legal class name.
5303 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5304 if (!_need_verify || _relax_verify) { return; }
5305
5306 assert(name->refcount() > 0, "symbol must be kept alive");
5307 char* bytes = (char*)name->bytes();
5308 unsigned int length = name->utf8_length();
5309 bool legal = false;
5310
5311 if (length > 0) {
5312 const char* p;
5313 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5314 p = skip_over_field_signature(bytes, false, length, CHECK);
5315 legal = (p != NULL) && ((p - bytes) == (int)length);
5316 } else if (_major_version < JAVA_1_5_VERSION) {
5317 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5318 p = skip_over_field_name(bytes, true, length);
5319 legal = (p != NULL) && ((p - bytes) == (int)length);
5320 }
5321 } else if ((_major_version >= CONSTANT_CLASS_DESCRIPTORS || _class_name->starts_with("jdk/internal/reflect/"))
5322 && bytes[length - 1] == ';' ) {
5323 // Support for L...; and Q...; descriptors
5324 legal = verify_unqualified_name(bytes + 1, length - 2, LegalClass);
5325 } else {
5326 // 4900761: relax the constraints based on JSR202 spec
5327 // Class names may be drawn from the entire Unicode character set.
5328 // Identifiers between '/' must be unqualified names.
5329 // The utf8 string has been verified when parsing cpool entries.
5330 legal = verify_unqualified_name(bytes, length, LegalClass);
5331 }
5332 }
5333 if (!legal) {
5334 ResourceMark rm(THREAD);
5335 assert(_class_name != NULL, "invariant");
5336 Exceptions::fthrow(
5337 THREAD_AND_LOCATION,
5338 vmSymbols::java_lang_ClassFormatError(),
5339 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5340 _class_name->as_C_string()
5341 );
5342 return;
5343 }
5344 }
5345
5346 // Checks if name is a legal field name.
5347 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5348 if (!_need_verify || _relax_verify) { return; }
5349
5350 char* bytes = (char*)name->bytes();
5351 unsigned int length = name->utf8_length();
5352 bool legal = false;
5353
5354 if (length > 0) {
5355 if (_major_version < JAVA_1_5_VERSION) {
5356 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5357 const char* p = skip_over_field_name(bytes, false, length);
5358 legal = (p != NULL) && ((p - bytes) == (int)length);
5359 }
5360 } else {
5361 // 4881221: relax the constraints based on JSR202 spec
5362 legal = verify_unqualified_name(bytes, length, LegalField);
5363 }
5364 }
5365
5366 if (!legal) {
5367 ResourceMark rm(THREAD);
5368 assert(_class_name != NULL, "invariant");
5369 Exceptions::fthrow(
5370 THREAD_AND_LOCATION,
5371 vmSymbols::java_lang_ClassFormatError(),
5372 "Illegal field name \"%.*s\" in class %s", length, bytes,
5373 _class_name->as_C_string()
5374 );
5375 return;
5376 }
5377 }
5378
5379 // Checks if name is a legal method name.
5380 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5381 if (!_need_verify || _relax_verify) { return; }
5382
5383 assert(name != NULL, "method name is null");
5384 char* bytes = (char*)name->bytes();
5385 unsigned int length = name->utf8_length();
5386 bool legal = false;
5387
5388 if (length > 0) {
5389 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5390 if (name == vmSymbols::object_initializer_name() ||
5391 name == vmSymbols::class_initializer_name() ||
5392 (EnableValhalla && supports_inline_types() &&
5393 name == vmSymbols::inline_factory_name())) {
5394 legal = true;
5395 }
5396 } else if (_major_version < JAVA_1_5_VERSION) {
5397 const char* p;
5398 p = skip_over_field_name(bytes, false, length);
5399 legal = (p != NULL) && ((p - bytes) == (int)length);
5400 } else {
5401 // 4881221: relax the constraints based on JSR202 spec
5402 legal = verify_unqualified_name(bytes, length, LegalMethod);
5403 }
5404 }
5405
5406 if (!legal) {
5407 ResourceMark rm(THREAD);
5408 assert(_class_name != NULL, "invariant");
5409 Exceptions::fthrow(
5410 THREAD_AND_LOCATION,
5411 vmSymbols::java_lang_ClassFormatError(),
5412 "Illegal method name \"%.*s\" in class %s", length, bytes,
5413 _class_name->as_C_string()
5414 );
5415 return;
5416 }
5417 }
5418
5419
5420 // Checks if signature is a legal field signature.
5421 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5422 const Symbol* signature,
5423 TRAPS) const {
5424 if (!_need_verify) { return; }
5425 if ((!supports_inline_types() || !EnablePrimitiveClasses) && (signature->is_Q_signature() || signature->is_Q_array_signature())) {
5426 throwIllegalSignature("Field", name, signature, CHECK);
5427 }
5428
5429 const char* const bytes = (const char* const)signature->bytes();
5430 const unsigned int length = signature->utf8_length();
5431 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5432
5433 if (p == NULL || (p - bytes) != (int)length) {
5434 throwIllegalSignature("Field", name, signature, CHECK);
5435 }
5436 }
5437
5438 // Check that the signature is compatible with the method name. For example,
5439 // check that <init> has a void signature.
5440 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
5441 const Symbol* signature,
5442 TRAPS) const {
5443 if (!_need_verify) {
5444 return;
5445 }
5446
5447 // Class initializers cannot have args for class format version >= 51.
5448 if (name == vmSymbols::class_initializer_name() &&
5449 signature != vmSymbols::void_method_signature() &&
5450 _major_version >= JAVA_7_VERSION) {
5451 throwIllegalSignature("Method", name, signature, THREAD);
5452 return;
5453 }
5454
5455 if (!is_value_class()) {
5456 int sig_length = signature->utf8_length();
5457 if (name->utf8_length() > 0 &&
5458 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
5459 sig_length > 0 &&
5460 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
5461 throwIllegalSignature("Method", name, signature, THREAD);
5462 }
5463 }
5464 }
5465
5466 // Checks if signature is a legal method signature.
5467 // Returns number of parameters
5468 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5469 const Symbol* signature,
5470 TRAPS) const {
5471 if (!_need_verify) {
5472 // make sure caller's args_size will be less than 0 even for non-static
5473 // method so it will be recomputed in compute_size_of_parameters().
5474 return -2;
5475 }
5476
5477 unsigned int args_size = 0;
5478 const char* p = (const char*)signature->bytes();
5479 unsigned int length = signature->utf8_length();
5480 const char* nextp;
5481
5482 // The first character must be a '('
5483 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5484 length--;
5485 // Skip over legal field signatures
5486 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5487 while ((length > 0) && (nextp != NULL)) {
5488 args_size++;
5489 if (p[0] == 'J' || p[0] == 'D') {
5490 args_size++;
5491 }
5492 length -= nextp - p;
5493 p = nextp;
5494 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5495 }
5496 // The first non-signature thing better be a ')'
5497 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5498 length--;
5499 // Now we better just have a return value
5500 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5501 if (nextp && ((int)length == (nextp - p))) {
5502 return args_size;
5503 }
5504 }
5505 }
5506 // Report error
5507 throwIllegalSignature("Method", name, signature, THREAD);
5508 return 0;
5509 }
5510
5511 int ClassFileParser::static_field_size() const {
5512 assert(_field_info != NULL, "invariant");
5513 return _field_info->_static_field_size;
5514 }
5515
5516 int ClassFileParser::total_oop_map_count() const {
5517 assert(_field_info != NULL, "invariant");
5518 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
5519 }
5520
5521 jint ClassFileParser::layout_size() const {
5522 assert(_field_info != NULL, "invariant");
5523 return _field_info->_instance_size;
5524 }
5525
5526 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5527 const Array<Method*>* methods) {
5528 assert(ik != NULL, "invariant");
5529 assert(methods != NULL, "invariant");
5530
5531 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5532 // (We used to do this lazily, but now we query it in Rewriter,
5533 // which is eagerly done for every method, so we might as well do it now,
5534 // when everything is fresh in memory.)
5535 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
5536
5537 if (klass_id != vmSymbolID::NO_SID) {
5538 for (int j = 0; j < methods->length(); ++j) {
5539 Method* method = methods->at(j);
5540 method->init_intrinsic_id(klass_id);
5541
5542 if (CheckIntrinsics) {
5543 // Check if an intrinsic is defined for method 'method',
5544 // but the method is not annotated with @IntrinsicCandidate.
5545 if (method->intrinsic_id() != vmIntrinsics::_none &&
5546 !method->intrinsic_candidate()) {
5547 tty->print("Compiler intrinsic is defined for method [%s], "
5548 "but the method is not annotated with @IntrinsicCandidate.%s",
5549 method->name_and_sig_as_C_string(),
5550 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5551 );
5552 tty->cr();
5553 DEBUG_ONLY(vm_exit(1));
5554 }
5555 // Check is the method 'method' is annotated with @IntrinsicCandidate,
5556 // but there is no intrinsic available for it.
5557 if (method->intrinsic_candidate() &&
5558 method->intrinsic_id() == vmIntrinsics::_none) {
5559 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
5560 "but no compiler intrinsic is defined for the method.%s",
5561 method->name_and_sig_as_C_string(),
5562 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5563 );
5564 tty->cr();
5565 DEBUG_ONLY(vm_exit(1));
5566 }
5567 }
5568 } // end for
5569
5570 #ifdef ASSERT
5571 if (CheckIntrinsics) {
5572 // Check for orphan methods in the current class. A method m
5573 // of a class C is orphan if an intrinsic is defined for method m,
5574 // but class C does not declare m.
5575 // The check is potentially expensive, therefore it is available
5576 // only in debug builds.
5577
5578 for (auto id : EnumRange<vmIntrinsicID>{}) {
5579 if (vmIntrinsics::_compiledLambdaForm == id) {
5580 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5581 // generated for the JVM from a LambdaForm and therefore no method
5582 // is defined for it.
5583 continue;
5584 }
5585 if (vmIntrinsics::_blackhole == id) {
5586 // The _blackhole intrinsic is a special marker. No explicit method
5587 // is defined for it.
5588 continue;
5589 }
5590
5591 if (vmIntrinsics::class_for(id) == klass_id) {
5592 // Check if the current class contains a method with the same
5593 // name, flags, signature.
5594 bool match = false;
5595 for (int j = 0; j < methods->length(); ++j) {
5596 const Method* method = methods->at(j);
5597 if (method->intrinsic_id() == id) {
5598 match = true;
5599 break;
5600 }
5601 }
5602
5603 if (!match) {
5604 char buf[1000];
5605 tty->print("Compiler intrinsic is defined for method [%s], "
5606 "but the method is not available in class [%s].%s",
5607 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
5608 ik->name()->as_C_string(),
5609 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5610 );
5611 tty->cr();
5612 DEBUG_ONLY(vm_exit(1));
5613 }
5614 }
5615 } // end for
5616 } // CheckIntrinsics
5617 #endif // ASSERT
5618 }
5619 }
5620
5621 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5622 const ClassInstanceInfo& cl_inst_info,
5623 TRAPS) {
5624 if (_klass != NULL) {
5625 return _klass;
5626 }
5627
5628 InstanceKlass* const ik =
5629 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5630
5631 if (is_hidden()) {
5632 mangle_hidden_class_name(ik);
5633 }
5634
5635 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5636
5637 assert(_klass == ik, "invariant");
5638 return ik;
5639 }
5640
5641 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5642 bool changed_by_loadhook,
5643 const ClassInstanceInfo& cl_inst_info,
5644 TRAPS) {
5645 assert(ik != NULL, "invariant");
5646
5647 // Set name and CLD before adding to CLD
5648 ik->set_class_loader_data(_loader_data);
5649 ik->set_name(_class_name);
5650
5651 // Add all classes to our internal class loader list here,
5652 // including classes in the bootstrap (NULL) class loader.
5653 const bool publicize = !is_internal();
5654
5655 _loader_data->add_class(ik, publicize);
5656
5657 set_klass_to_deallocate(ik);
5658
5659 assert(_field_info != NULL, "invariant");
5660 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5661 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5662 "sanity");
5663
5664 assert(ik->is_instance_klass(), "sanity");
5665 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5666
5667 // Fill in information already parsed
5668 ik->set_should_verify_class(_need_verify);
5669
5670 // Not yet: supers are done below to support the new subtype-checking fields
5671 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5672 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5673 if (_field_info->_is_naturally_atomic && ik->is_inline_klass()) {
5674 ik->set_is_naturally_atomic();
5675 }
5676
5677 if (carries_identity_modifier()) {
5678 ik->set_carries_identity_modifier();
5679 } else if (carries_value_modifier()) {
5680 ik->set_carries_value_modifier();
5681 }
5682
5683 assert(_fac != NULL, "invariant");
5684 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_INLINE]);
5685
5686 // this transfers ownership of a lot of arrays from
5687 // the parser onto the InstanceKlass*
5688 apply_parsed_class_metadata(ik, _java_fields_count);
5689
5690 // can only set dynamic nest-host after static nest information is set
5691 if (cl_inst_info.dynamic_nest_host() != NULL) {
5692 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5693 }
5694
5695 // note that is not safe to use the fields in the parser from this point on
5696 assert(NULL == _cp, "invariant");
5697 assert(NULL == _fields, "invariant");
5698 assert(NULL == _methods, "invariant");
5699 assert(NULL == _inner_classes, "invariant");
5700 assert(NULL == _nest_members, "invariant");
5701 assert(NULL == _preload_classes, "invariant");
5702 assert(NULL == _combined_annotations, "invariant");
5703 assert(NULL == _record_components, "invariant");
5704 assert(NULL == _permitted_subclasses, "invariant");
5705
5706 if (_has_localvariable_table) {
5707 ik->set_has_localvariable_table(true);
5708 }
5709
5710 if (_has_final_method) {
5711 ik->set_has_final_method();
5712 }
5713
5714 ik->copy_method_ordering(_method_ordering, CHECK);
5715 // The InstanceKlass::_methods_jmethod_ids cache
5716 // is managed on the assumption that the initial cache
5717 // size is equal to the number of methods in the class. If
5718 // that changes, then InstanceKlass::idnum_can_increment()
5719 // has to be changed accordingly.
5720 ik->set_initial_method_idnum(ik->methods()->length());
5721
5722 ik->set_this_class_index(_this_class_index);
5723
5724 if (_is_hidden) {
5725 // _this_class_index is a CONSTANT_Class entry that refers to this
5726 // hidden class itself. If this class needs to refer to its own methods
5727 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5728 // _this_class_index. However, because this class is hidden (it's
5729 // not stored in SystemDictionary), _this_class_index cannot be resolved
5730 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5731 // Therefore, we must eagerly resolve _this_class_index now.
5732 ik->constants()->klass_at_put(_this_class_index, ik);
5733 }
5734
5735 ik->set_minor_version(_minor_version);
5736 ik->set_major_version(_major_version);
5737 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5738 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5739 if (_is_declared_atomic) {
5740 ik->set_is_declared_atomic();
5741 }
5742
5743 if (_is_hidden) {
5744 ik->set_is_hidden();
5745 }
5746
5747 // Set PackageEntry for this_klass
5748 oop cl = ik->class_loader();
5749 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5750 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5751 ik->set_package(cld, NULL, CHECK);
5752
5753 const Array<Method*>* const methods = ik->methods();
5754 assert(methods != NULL, "invariant");
5755 const int methods_len = methods->length();
5756
5757 check_methods_for_intrinsics(ik, methods);
5758
5759 // Fill in field values obtained by parse_classfile_attributes
5760 if (_parsed_annotations->has_any_annotations()) {
5761 _parsed_annotations->apply_to(ik);
5762 }
5763
5764 apply_parsed_class_attributes(ik);
5765
5766 // Miranda methods
5767 if ((_num_miranda_methods > 0) ||
5768 // if this class introduced new miranda methods or
5769 (_super_klass != NULL && _super_klass->has_miranda_methods())
5770 // super class exists and this class inherited miranda methods
5771 ) {
5772 ik->set_has_miranda_methods(); // then set a flag
5773 }
5774
5775 // Fill in information needed to compute superclasses.
5776 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5777 ik->set_transitive_interfaces(_transitive_interfaces);
5778 ik->set_local_interfaces(_local_interfaces);
5779 _transitive_interfaces = NULL;
5780 _local_interfaces = NULL;
5781
5782 // Initialize itable offset tables
5783 klassItable::setup_itable_offset_table(ik);
5784
5785 // Compute transitive closure of interfaces this class implements
5786 // Do final class setup
5787 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5788 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5789 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5790 }
5791
5792 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5793 ( _super_klass != NULL && _super_klass->has_contended_annotations())) {
5794 ik->set_has_contended_annotations(true);
5795 }
5796
5797 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5798 set_precomputed_flags(ik);
5799
5800 // check if this class can access its super class
5801 check_super_class_access(ik, CHECK);
5802
5803 // check if this class can access its superinterfaces
5804 check_super_interface_access(ik, CHECK);
5805
5806 // check if this class overrides any final method
5807 check_final_method_override(ik, CHECK);
5808
5809 // reject static interface methods prior to Java 8
5810 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5811 check_illegal_static_method(ik, CHECK);
5812 }
5813
5814 // Obtain this_klass' module entry
5815 ModuleEntry* module_entry = ik->module();
5816 assert(module_entry != NULL, "module_entry should always be set");
5817
5818 // Obtain java.lang.Module
5819 Handle module_handle(THREAD, module_entry->module());
5820
5821 // Allocate mirror and initialize static fields
5822 // The create_mirror() call will also call compute_modifiers()
5823 java_lang_Class::create_mirror(ik,
5824 Handle(THREAD, _loader_data->class_loader()),
5825 module_handle,
5826 _protection_domain,
5827 cl_inst_info.class_data(),
5828 CHECK);
5829
5830 assert(_all_mirandas != NULL, "invariant");
5831
5832 // Generate any default methods - default methods are public interface methods
5833 // that have a default implementation. This is new with Java 8.
5834 if (_has_nonstatic_concrete_methods) {
5835 DefaultMethods::generate_default_methods(ik,
5836 _all_mirandas,
5837 CHECK);
5838 }
5839
5840 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5841 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5842 !module_entry->has_default_read_edges()) {
5843 if (!module_entry->set_has_default_read_edges()) {
5844 // We won a potential race
5845 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5846 }
5847 }
5848
5849 bool all_fields_empty = true;
5850 for (AllFieldStream fs(ik->fields(), ik->constants()); !fs.done(); fs.next()) {
5851 if (!fs.access_flags().is_static()) {
5852 if (fs.field_descriptor().is_inline_type()) {
5853 Klass* k = _inline_type_field_klasses->at(fs.index());
5854 ik->set_inline_type_field_klass(fs.index(), k);
5855 if (!InlineKlass::cast(k)->is_empty_inline_type()) { all_fields_empty = false; }
5856 } else {
5857 all_fields_empty = false;
5858 }
5859 } else if (is_inline_type() && (fs.name() == vmSymbols::default_value_name())) {
5860 InlineKlass::cast(ik)->set_default_value_offset(ik->field_offset(fs.index()));
5861 }
5862 }
5863
5864 if (_is_empty_inline_type || (is_inline_type() && all_fields_empty)) {
5865 ik->set_is_empty_inline_type();
5866 }
5867
5868 if (is_inline_type()) {
5869 InlineKlass* vk = InlineKlass::cast(ik);
5870 vk->set_alignment(_alignment);
5871 vk->set_first_field_offset(_first_field_offset);
5872 vk->set_exact_size_in_bytes(_exact_size_in_bytes);
5873 InlineKlass::cast(ik)->initialize_calling_convention(CHECK);
5874 }
5875
5876 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5877
5878 if (!is_internal()) {
5879 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5880
5881 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5882 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5883 log_is_enabled(Info, class, preview)) {
5884 ResourceMark rm;
5885 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5886 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5887 }
5888
5889 if (log_is_enabled(Debug, class, resolve)) {
5890 ResourceMark rm;
5891 // print out the superclass.
5892 const char * from = ik->external_name();
5893 if (ik->java_super() != NULL) {
5894 log_debug(class, resolve)("%s %s (super)",
5895 from,
5896 ik->java_super()->external_name());
5897 }
5898 // print out each of the interface classes referred to by this class.
5899 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5900 if (local_interfaces != NULL) {
5901 const int length = local_interfaces->length();
5902 for (int i = 0; i < length; i++) {
5903 const InstanceKlass* const k = local_interfaces->at(i);
5904 const char * to = k->external_name();
5905 log_debug(class, resolve)("%s %s (interface)", from, to);
5906 }
5907 }
5908 }
5909 }
5910
5911 JFR_ONLY(INIT_ID(ik);)
5912
5913 // If we reach here, all is well.
5914 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5915 // in order for it to not be destroyed in the ClassFileParser destructor.
5916 set_klass_to_deallocate(NULL);
5917
5918 // it's official
5919 set_klass(ik);
5920
5921 debug_only(ik->verify();)
5922 }
5923
5924 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5925 // Decrement the refcount in the old name, since we're clobbering it.
5926 _class_name->decrement_refcount();
5927
5928 _class_name = new_class_name;
5929 // Increment the refcount of the new name.
5930 // Now the ClassFileParser owns this name and will decrement in
5931 // the destructor.
5932 _class_name->increment_refcount();
5933 }
5934
5935 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5936 bool trusted = loader_data->is_boot_class_loader_data() ||
5937 loader_data->is_platform_class_loader_data();
5938 bool need_verify =
5939 // verifyAll
5940 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5941 // verifyRemote
5942 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5943 return !need_verify;
5944 }
5945
5946 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5947 Symbol* name,
5948 ClassLoaderData* loader_data,
5949 const ClassLoadInfo* cl_info,
5950 Publicity pub_level,
5951 TRAPS) :
5952 _stream(stream),
5953 _class_name(NULL),
5954 _loader_data(loader_data),
5955 _is_hidden(cl_info->is_hidden()),
5956 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5957 _orig_cp_size(0),
5958 _super_klass(),
5959 _cp(NULL),
5960 _fields(NULL),
5961 _methods(NULL),
5962 _inner_classes(NULL),
5963 _nest_members(NULL),
5964 _nest_host(0),
5965 _permitted_subclasses(NULL),
5966 _preload_classes(NULL),
5967 _record_components(NULL),
5968 _local_interfaces(NULL),
5969 _local_interface_indexes(NULL),
5970 _transitive_interfaces(NULL),
5971 _combined_annotations(NULL),
5972 _class_annotations(NULL),
5973 _class_type_annotations(NULL),
5974 _fields_annotations(NULL),
5975 _fields_type_annotations(NULL),
5976 _klass(NULL),
5977 _klass_to_deallocate(NULL),
5978 _parsed_annotations(NULL),
5979 _fac(NULL),
5980 _field_info(NULL),
5981 _inline_type_field_klasses(NULL),
5982 _method_ordering(NULL),
5983 _all_mirandas(NULL),
5984 _vtable_size(0),
5985 _itable_size(0),
5986 _num_miranda_methods(0),
5987 _protection_domain(cl_info->protection_domain()),
5988 _access_flags(),
5989 _pub_level(pub_level),
5990 _bad_constant_seen(0),
5991 _synthetic_flag(false),
5992 _sde_length(false),
5993 _sde_buffer(NULL),
5994 _sourcefile_index(0),
5995 _generic_signature_index(0),
5996 _major_version(0),
5997 _minor_version(0),
5998 _this_class_index(0),
5999 _super_class_index(0),
6000 _itfs_len(0),
6001 _java_fields_count(0),
6002 _need_verify(false),
6003 _relax_verify(false),
6004 _has_nonstatic_concrete_methods(false),
6005 _declares_nonstatic_concrete_methods(false),
6006 _has_localvariable_table(false),
6007 _has_final_method(false),
6008 _has_contended_fields(false),
6009 _has_inline_type_fields(false),
6010 _has_nonstatic_fields(false),
6011 _is_empty_inline_type(false),
6012 _is_naturally_atomic(false),
6013 _is_declared_atomic(false),
6014 _carries_value_modifier(false),
6015 _carries_identity_modifier(false),
6016 _has_finalizer(false),
6017 _has_empty_finalizer(false),
6018 _has_vanilla_constructor(false),
6019 _max_bootstrap_specifier_index(-1) {
6020
6021 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
6022 _class_name->increment_refcount();
6023
6024 assert(_loader_data != NULL, "invariant");
6025 assert(stream != NULL, "invariant");
6026 assert(_stream != NULL, "invariant");
6027 assert(_stream->buffer() == _stream->current(), "invariant");
6028 assert(_class_name != NULL, "invariant");
6029 assert(0 == _access_flags.as_int(), "invariant");
6030
6031 // Figure out whether we can skip format checking (matching classic VM behavior)
6032 if (DumpSharedSpaces) {
6033 // verify == true means it's a 'remote' class (i.e., non-boot class)
6034 // Verification decision is based on BytecodeVerificationRemote flag
6035 // for those classes.
6036 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
6037 BytecodeVerificationLocal;
6038 }
6039 else {
6040 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
6041 stream->need_verify());
6042 }
6043
6044 // synch back verification state to stream
6045 stream->set_verify(_need_verify);
6046
6047 // Check if verification needs to be relaxed for this class file
6048 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
6049 _relax_verify = relax_format_check_for(_loader_data);
6050
6051 parse_stream(stream, CHECK);
6052
6053 post_process_parsed_stream(stream, _cp, CHECK);
6054 }
6055
6056 void ClassFileParser::clear_class_metadata() {
6057 // metadata created before the instance klass is created. Must be
6058 // deallocated if classfile parsing returns an error.
6059 _cp = NULL;
6060 _fields = NULL;
6061 _methods = NULL;
6062 _inner_classes = NULL;
6063 _nest_members = NULL;
6064 _permitted_subclasses = NULL;
6065 _preload_classes = NULL;
6066 _combined_annotations = NULL;
6067 _class_annotations = _class_type_annotations = NULL;
6068 _fields_annotations = _fields_type_annotations = NULL;
6069 _record_components = NULL;
6070 }
6071
6072 // Destructor to clean up
6073 ClassFileParser::~ClassFileParser() {
6074 _class_name->decrement_refcount();
6075
6076 if (_cp != NULL) {
6077 MetadataFactory::free_metadata(_loader_data, _cp);
6078 }
6079 if (_fields != NULL) {
6080 MetadataFactory::free_array<u2>(_loader_data, _fields);
6081 }
6082
6083 if (_inline_type_field_klasses != NULL) {
6084 MetadataFactory::free_array<InlineKlass*>(_loader_data, _inline_type_field_klasses);
6085 }
6086
6087 if (_methods != NULL) {
6088 // Free methods
6089 InstanceKlass::deallocate_methods(_loader_data, _methods);
6090 }
6091
6092 // beware of the Universe::empty_blah_array!!
6093 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6094 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6095 }
6096
6097 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
6098 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
6099 }
6100
6101 if (_record_components != NULL) {
6102 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
6103 }
6104
6105 if (_permitted_subclasses != NULL && _permitted_subclasses != Universe::the_empty_short_array()) {
6106 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
6107 }
6108
6109 if (_preload_classes != NULL && _preload_classes != Universe::the_empty_short_array()) {
6110 MetadataFactory::free_array<u2>(_loader_data, _preload_classes);
6111 }
6112
6113 // Free interfaces
6114 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6115 _local_interfaces, _transitive_interfaces);
6116
6117 if (_combined_annotations != NULL) {
6118 // After all annotations arrays have been created, they are installed into the
6119 // Annotations object that will be assigned to the InstanceKlass being created.
6120
6121 // Deallocate the Annotations object and the installed annotations arrays.
6122 _combined_annotations->deallocate_contents(_loader_data);
6123
6124 // If the _combined_annotations pointer is non-NULL,
6125 // then the other annotations fields should have been cleared.
6126 assert(_class_annotations == NULL, "Should have been cleared");
6127 assert(_class_type_annotations == NULL, "Should have been cleared");
6128 assert(_fields_annotations == NULL, "Should have been cleared");
6129 assert(_fields_type_annotations == NULL, "Should have been cleared");
6130 } else {
6131 // If the annotations arrays were not installed into the Annotations object,
6132 // then they have to be deallocated explicitly.
6133 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
6134 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
6135 Annotations::free_contents(_loader_data, _fields_annotations);
6136 Annotations::free_contents(_loader_data, _fields_type_annotations);
6137 }
6138
6139 clear_class_metadata();
6140 _transitive_interfaces = NULL;
6141 _local_interfaces = NULL;
6142
6143 // deallocate the klass if already created. Don't directly deallocate, but add
6144 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6145 // at a safepoint.
6146 if (_klass_to_deallocate != NULL) {
6147 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6148 }
6149 }
6150
6151 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6152 TRAPS) {
6153
6154 assert(stream != NULL, "invariant");
6155 assert(_class_name != NULL, "invariant");
6156
6157 // BEGIN STREAM PARSING
6158 stream->guarantee_more(8, CHECK); // magic, major, minor
6159 // Magic value
6160 const u4 magic = stream->get_u4_fast();
6161 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6162 "Incompatible magic value %u in class file %s",
6163 magic, CHECK);
6164
6165 // Version numbers
6166 _minor_version = stream->get_u2_fast();
6167 _major_version = stream->get_u2_fast();
6168
6169 // Check version numbers - we check this even with verifier off
6170 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6171
6172 stream->guarantee_more(3, CHECK); // length, first cp tag
6173 u2 cp_size = stream->get_u2_fast();
6174
6175 guarantee_property(
6176 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6177 cp_size, CHECK);
6178
6179 _orig_cp_size = cp_size;
6180 if (is_hidden()) { // Add a slot for hidden class name.
6181 cp_size++;
6182 }
6183
6184 _cp = ConstantPool::allocate(_loader_data,
6185 cp_size,
6186 CHECK);
6187
6188 ConstantPool* const cp = _cp;
6189
6190 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6191
6192 assert(cp_size == (const u2)cp->length(), "invariant");
6193
6194 // ACCESS FLAGS
6195 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6196
6197 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6198 // JVM_ACC_MODULE is defined in JDK-9 and later.
6199 if (_major_version >= JAVA_9_VERSION) {
6200 recognized_modifiers |= JVM_ACC_MODULE;
6201 }
6202 // JVM_ACC_VALUE and JVM_ACC_PRIMITIVE supported version
6203 if (supports_inline_types()) {
6204 recognized_modifiers |= JVM_ACC_PRIMITIVE | JVM_ACC_VALUE;
6205 }
6206
6207 // Access flags
6208 jint flags = stream->get_u2_fast() & recognized_modifiers;
6209
6210 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6211 // Set abstract bit for old class files for backward compatibility
6212 flags |= JVM_ACC_ABSTRACT;
6213 }
6214
6215 // This class and superclass
6216 _this_class_index = stream->get_u2_fast();
6217 check_property(
6218 valid_cp_range(_this_class_index, cp_size) &&
6219 cp->tag_at(_this_class_index).is_unresolved_klass(),
6220 "Invalid this class index %u in constant pool in class file %s",
6221 _this_class_index, CHECK);
6222
6223 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6224 assert(class_name_in_cp != NULL, "class_name can't be null");
6225
6226 bool is_java_lang_Object = class_name_in_cp == vmSymbols::java_lang_Object();
6227
6228 verify_legal_class_modifiers(flags, NULL, is_java_lang_Object, CHECK);
6229
6230 if (EnableValhalla) {
6231 if(!supports_inline_types()) {
6232 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
6233 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
6234 if (!is_module && !is_interface && !is_java_lang_Object) {
6235 flags |= JVM_ACC_IDENTITY;
6236 }
6237 }
6238 }
6239
6240 _access_flags.set_flags(flags);
6241
6242 if (EnableValhalla) {
6243 if (_access_flags.is_identity_class()) set_carries_identity_modifier();
6244 if (_access_flags.is_value_class()) set_carries_value_modifier();
6245 if (carries_identity_modifier() && carries_value_modifier()) {
6246 classfile_parse_error("Class %s has both ACC_IDENTITY and ACC_VALUE modifiers", THREAD);
6247 }
6248 }
6249
6250 short bad_constant = class_bad_constant_seen();
6251 if (bad_constant != 0) {
6252 // Do not throw CFE until after the access_flags are checked because if
6253 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6254 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
6255 return;
6256 }
6257
6258 // Don't need to check whether this class name is legal or not.
6259 // It has been checked when constant pool is parsed.
6260 // However, make sure it is not an array type.
6261 if (_need_verify) {
6262 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
6263 "Bad class name in class file %s",
6264 CHECK);
6265 }
6266
6267 #ifdef ASSERT
6268 // Basic sanity checks
6269 if (_is_hidden) {
6270 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
6271 }
6272 #endif
6273
6274 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
6275
6276 if (_is_hidden) {
6277 assert(_class_name != NULL, "Unexpected null _class_name");
6278 #ifdef ASSERT
6279 if (_need_verify) {
6280 verify_legal_class_name(_class_name, CHECK);
6281 }
6282 #endif
6283
6284 } else {
6285 // Check if name in class file matches given name
6286 if (_class_name != class_name_in_cp) {
6287 if (_class_name != vmSymbols::unknown_class_name()) {
6288 ResourceMark rm(THREAD);
6289 Exceptions::fthrow(THREAD_AND_LOCATION,
6290 vmSymbols::java_lang_NoClassDefFoundError(),
6291 "%s (wrong name: %s)",
6292 _class_name->as_C_string(),
6293 class_name_in_cp->as_C_string()
6294 );
6295 return;
6296 } else {
6297 // The class name was not known by the caller so we set it from
6298 // the value in the CP.
6299 update_class_name(class_name_in_cp);
6300 }
6301 // else nothing to do: the expected class name matches what is in the CP
6302 }
6303 }
6304
6305 // Verification prevents us from creating names with dots in them, this
6306 // asserts that that's the case.
6307 assert(is_internal_format(_class_name), "external class name format used internally");
6308
6309 if (!is_internal()) {
6310 LogTarget(Debug, class, preorder) lt;
6311 if (lt.is_enabled()){
6312 ResourceMark rm(THREAD);
6313 LogStream ls(lt);
6314 ls.print("%s", _class_name->as_klass_external_name());
6315 if (stream->source() != NULL) {
6316 ls.print(" source: %s", stream->source());
6317 }
6318 ls.cr();
6319 }
6320 }
6321
6322 // SUPERKLASS
6323 _super_class_index = stream->get_u2_fast();
6324 _super_klass = parse_super_class(cp,
6325 _super_class_index,
6326 _need_verify,
6327 CHECK);
6328
6329 // Interfaces
6330 _itfs_len = stream->get_u2_fast();
6331 parse_interfaces(stream,
6332 _itfs_len,
6333 cp,
6334 &_has_nonstatic_concrete_methods,
6335 &_is_declared_atomic,
6336 CHECK);
6337
6338 // Fields (offsets are filled in later)
6339 _fac = new FieldAllocationCount();
6340 parse_fields(stream,
6341 _access_flags,
6342 _fac,
6343 cp,
6344 cp_size,
6345 &_java_fields_count,
6346 CHECK);
6347
6348 assert(_fields != NULL, "invariant");
6349
6350 // Methods
6351 parse_methods(stream,
6352 is_interface(),
6353 is_value_class(),
6354 is_abstract_class(),
6355 &_has_localvariable_table,
6356 &_has_final_method,
6357 &_declares_nonstatic_concrete_methods,
6358 CHECK);
6359
6360 assert(_methods != NULL, "invariant");
6361
6362 if (_declares_nonstatic_concrete_methods) {
6363 _has_nonstatic_concrete_methods = true;
6364 }
6365
6366 // Additional attributes/annotations
6367 _parsed_annotations = new ClassAnnotationCollector();
6368 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6369
6370 assert(_inner_classes != NULL, "invariant");
6371
6372 // Finalize the Annotations metadata object,
6373 // now that all annotation arrays have been created.
6374 create_combined_annotations(CHECK);
6375
6376 // Make sure this is the end of class file stream
6377 guarantee_property(stream->at_eos(),
6378 "Extra bytes at the end of class file %s",
6379 CHECK);
6380
6381 // all bytes in stream read and parsed
6382 }
6383
6384 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
6385 ResourceMark rm;
6386 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
6387 // use a '/' because that confuses finding the class's package. Also, can't
6388 // use an illegal char such as ';' because that causes serialization issues
6389 // and issues with hidden classes that create their own hidden classes.
6390 char addr_buf[20];
6391 if (DumpSharedSpaces) {
6392 // We want stable names for the archived hidden classes (only for static
6393 // archive for now). Spaces under default_SharedBaseAddress() will be
6394 // occupied by the archive at run time, so we know that no dynamically
6395 // loaded InstanceKlass will be placed under there.
6396 static volatile size_t counter = 0;
6397 Atomic::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
6398 size_t new_id = Atomic::add(&counter, (size_t)1);
6399 jio_snprintf(addr_buf, 20, SIZE_FORMAT_X, new_id);
6400 } else {
6401 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
6402 }
6403 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
6404 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
6405 jio_snprintf(new_name, new_name_len, "%s+%s",
6406 _class_name->as_C_string(), addr_buf);
6407 update_class_name(SymbolTable::new_symbol(new_name));
6408
6409 // Add a Utf8 entry containing the hidden name.
6410 assert(_class_name != NULL, "Unexpected null _class_name");
6411 int hidden_index = _orig_cp_size; // this is an extra slot we added
6412 _cp->symbol_at_put(hidden_index, _class_name);
6413
6414 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
6415 // We have to update the resolved_klass_index and the name_index together
6416 // so extract the existing resolved_klass_index first.
6417 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
6418 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
6419 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
6420 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
6421 "Bad name_index");
6422 }
6423
6424 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6425 ConstantPool* cp,
6426 TRAPS) {
6427 assert(stream != NULL, "invariant");
6428 assert(stream->at_eos(), "invariant");
6429 assert(cp != NULL, "invariant");
6430 assert(_loader_data != NULL, "invariant");
6431
6432 if (_class_name == vmSymbols::java_lang_Object()) {
6433 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6434 "java.lang.Object cannot implement an interface in class file %s",
6435 CHECK);
6436 }
6437 // We check super class after class file is parsed and format is checked
6438 if (_super_class_index > 0 && NULL == _super_klass) {
6439 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6440 if (is_interface()) {
6441 // Before attempting to resolve the superclass, check for class format
6442 // errors not checked yet.
6443 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6444 "Interfaces must have java.lang.Object as superclass in class file %s",
6445 CHECK);
6446 }
6447 Handle loader(THREAD, _loader_data->class_loader());
6448 if (loader.is_null() && super_class_name == vmSymbols::java_lang_Object()) {
6449 _super_klass = vmClasses::Object_klass();
6450 } else {
6451 _super_klass = (const InstanceKlass*)
6452 SystemDictionary::resolve_super_or_fail(_class_name,
6453 super_class_name,
6454 loader,
6455 _protection_domain,
6456 true,
6457 CHECK);
6458 }
6459 }
6460
6461 if (_super_klass != NULL) {
6462 if (_super_klass->is_interface()) {
6463 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
6464 return;
6465 }
6466
6467 if (EnableValhalla) {
6468 check_identity_and_value_modifiers(this, _super_klass, CHECK);
6469 }
6470
6471 if (_super_klass->has_nonstatic_concrete_methods()) {
6472 _has_nonstatic_concrete_methods = true;
6473 }
6474 if (_super_klass->is_declared_atomic()) {
6475 _is_declared_atomic = true;
6476 }
6477 }
6478
6479 if (*ForceNonTearable != '\0') {
6480 // Allow a command line switch to force the same atomicity property:
6481 const char* class_name_str = _class_name->as_C_string();
6482 if (StringUtils::class_list_match(ForceNonTearable, class_name_str)) {
6483 _is_declared_atomic = true;
6484 }
6485 }
6486
6487 int itfs_len = _local_interface_indexes == NULL ? 0 : _local_interface_indexes->length();
6488 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
6489 if (_local_interface_indexes != NULL) {
6490 for (int i = 0; i < _local_interface_indexes->length(); i++) {
6491 u2 interface_index = _local_interface_indexes->at(i);
6492 Klass* interf;
6493 if (cp->tag_at(interface_index).is_klass()) {
6494 interf = cp->resolved_klass_at(interface_index);
6495 } else {
6496 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
6497
6498 // Don't need to check legal name because it's checked when parsing constant pool.
6499 // But need to make sure it's not an array type.
6500 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
6501 "Bad interface name in class file %s", CHECK);
6502
6503 // Call resolve_super so class circularity is checked
6504 interf = SystemDictionary::resolve_super_or_fail(
6505 _class_name,
6506 unresolved_klass,
6507 Handle(THREAD, _loader_data->class_loader()),
6508 _protection_domain,
6509 false,
6510 CHECK);
6511 }
6512
6513 if (!interf->is_interface()) {
6514 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
6515 err_msg("class %s can not implement %s, because it is not an interface (%s)",
6516 _class_name->as_klass_external_name(),
6517 interf->external_name(),
6518 interf->class_in_module_of_loader()));
6519 }
6520
6521 if (EnableValhalla) {
6522 // Check modifiers and set carries_identity_modifier/carries_value_modifier flags
6523 check_identity_and_value_modifiers(this, InstanceKlass::cast(interf), CHECK);
6524 }
6525
6526 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
6527 _has_nonstatic_concrete_methods = true;
6528 }
6529 if (InstanceKlass::cast(interf)->is_declared_atomic()) {
6530 _is_declared_atomic = true;
6531 }
6532 _local_interfaces->at_put(i, InstanceKlass::cast(interf));
6533 }
6534 }
6535 assert(_local_interfaces != NULL, "invariant");
6536
6537 // Compute the transitive list of all unique interfaces implemented by this class
6538 _transitive_interfaces =
6539 compute_transitive_interfaces(_super_klass,
6540 _local_interfaces,
6541 _loader_data,
6542 CHECK);
6543
6544 assert(_transitive_interfaces != NULL, "invariant");
6545
6546 // sort methods
6547 _method_ordering = sort_methods(_methods);
6548
6549 _all_mirandas = new GrowableArray<Method*>(20);
6550
6551 Handle loader(THREAD, _loader_data->class_loader());
6552 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6553 &_num_miranda_methods,
6554 _all_mirandas,
6555 _super_klass,
6556 _methods,
6557 _access_flags,
6558 _major_version,
6559 loader,
6560 _class_name,
6561 _local_interfaces);
6562
6563 // Size of Java itable (in words)
6564 _itable_size = is_interface() ? 0 :
6565 klassItable::compute_itable_size(_transitive_interfaces);
6566
6567 assert(_fac != NULL, "invariant");
6568 assert(_parsed_annotations != NULL, "invariant");
6569
6570
6571 if (EnablePrimitiveClasses) {
6572 _inline_type_field_klasses = MetadataFactory::new_array<InlineKlass*>(_loader_data,
6573 java_fields_count(),
6574 NULL,
6575 CHECK);
6576 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
6577 if (Signature::basic_type(fs.signature()) == T_PRIMITIVE_OBJECT && !fs.access_flags().is_static()) {
6578 // Pre-load inline class
6579 Klass* klass = SystemDictionary::resolve_inline_type_field_or_fail(&fs,
6580 Handle(THREAD, _loader_data->class_loader()),
6581 _protection_domain, true, CHECK);
6582 assert(klass != NULL, "Sanity check");
6583 if (!klass->access_flags().is_value_class()) {
6584 assert(klass->is_instance_klass(), "Sanity check");
6585 ResourceMark rm(THREAD);
6586 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
6587 err_msg("Class %s expects class %s to be an inline type, but it is not",
6588 _class_name->as_C_string(),
6589 InstanceKlass::cast(klass)->external_name()));
6590 }
6591 _inline_type_field_klasses->at_put(fs.index(), InlineKlass::cast(klass));
6592 }
6593 }
6594 }
6595
6596 _field_info = new FieldLayoutInfo();
6597 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, _fields,
6598 _parsed_annotations->is_contended(), is_inline_type(),
6599 _field_info, _inline_type_field_klasses);
6600 lb.build_layout(CHECK);
6601 if (is_inline_type()) {
6602 _alignment = lb.get_alignment();
6603 _first_field_offset = lb.get_first_field_offset();
6604 _exact_size_in_bytes = lb.get_exact_size_in_byte();
6605 }
6606 _has_inline_type_fields = _field_info->_has_inline_fields;
6607 }
6608
6609 void ClassFileParser::set_klass(InstanceKlass* klass) {
6610
6611 #ifdef ASSERT
6612 if (klass != NULL) {
6613 assert(NULL == _klass, "leaking?");
6614 }
6615 #endif
6616
6617 _klass = klass;
6618 }
6619
6620 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6621
6622 #ifdef ASSERT
6623 if (klass != NULL) {
6624 assert(NULL == _klass_to_deallocate, "leaking?");
6625 }
6626 #endif
6627
6628 _klass_to_deallocate = klass;
6629 }
6630
6631 // Caller responsible for ResourceMark
6632 // clone stream with rewound position
6633 const ClassFileStream* ClassFileParser::clone_stream() const {
6634 assert(_stream != NULL, "invariant");
6635
6636 return _stream->clone();
6637 }
6638
6639 ReferenceType ClassFileParser::super_reference_type() const {
6640 return _super_klass == NULL ? REF_NONE : _super_klass->reference_type();
6641 }
6642
6643 bool ClassFileParser::is_instance_ref_klass() const {
6644 // Only the subclasses of j.l.r.Reference are InstanceRefKlass.
6645 // j.l.r.Reference itself is InstanceKlass because InstanceRefKlass denotes a
6646 // klass requiring special treatment in ref-processing. The abstract
6647 // j.l.r.Reference cannot be instantiated so doesn't partake in
6648 // ref-processing.
6649 return is_java_lang_ref_Reference_subclass();
6650 }
6651
6652 bool ClassFileParser::is_java_lang_ref_Reference_subclass() const {
6653 if (_super_klass == NULL) {
6654 return false;
6655 }
6656
6657 if (_super_klass->name() == vmSymbols::java_lang_ref_Reference()) {
6658 // Direct subclass of j.l.r.Reference: Soft|Weak|Final|Phantom
6659 return true;
6660 }
6661
6662 return _super_klass->reference_type() != REF_NONE;
6663 }
6664
6665 // ----------------------------------------------------------------------------
6666 // debugging
6667
6668 #ifdef ASSERT
6669
6670 // return true if class_name contains no '.' (internal format is '/')
6671 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6672 if (class_name != NULL) {
6673 ResourceMark rm;
6674 char* name = class_name->as_C_string();
6675 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6676 } else {
6677 return true;
6678 }
6679 }
6680
6681 #endif