1 /*
2 * Copyright (c) 1997, 2025, 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 #include "cds/cdsConfig.hpp"
25 #include "classfile/classFileParser.hpp"
26 #include "classfile/classFileStream.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/classLoaderData.inline.hpp"
29 #include "classfile/classLoadInfo.hpp"
30 #include "classfile/defaultMethods.hpp"
31 #include "classfile/fieldLayoutBuilder.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/packageEntry.hpp"
35 #include "classfile/symbolTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/verificationType.hpp"
38 #include "classfile/verifier.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "jvm.h"
42 #include "logging/log.hpp"
43 #include "logging/logStream.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/metadataFactory.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/annotations.hpp"
50 #include "oops/constantPool.inline.hpp"
51 #include "oops/fieldInfo.hpp"
52 #include "oops/fieldStreams.inline.hpp"
53 #include "oops/instanceKlass.inline.hpp"
54 #include "oops/instanceMirrorKlass.hpp"
55 #include "oops/klass.inline.hpp"
56 #include "oops/klassVtable.hpp"
57 #include "oops/metadata.hpp"
58 #include "oops/method.inline.hpp"
59 #include "oops/oop.inline.hpp"
60 #include "oops/recordComponent.hpp"
61 #include "oops/symbol.hpp"
62 #include "prims/jvmtiExport.hpp"
63 #include "prims/jvmtiThreadState.hpp"
64 #include "runtime/arguments.hpp"
65 #include "runtime/fieldDescriptor.inline.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/os.hpp"
69 #include "runtime/perfData.hpp"
70 #include "runtime/reflection.hpp"
71 #include "runtime/safepointVerifiers.hpp"
72 #include "runtime/signature.hpp"
73 #include "runtime/timer.hpp"
74 #include "services/classLoadingService.hpp"
75 #include "services/threadService.hpp"
76 #include "utilities/align.hpp"
77 #include "utilities/bitMap.inline.hpp"
78 #include "utilities/checkedCast.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/utf8.hpp"
88 #if INCLUDE_CDS
89 #include "classfile/systemDictionaryShared.hpp"
90 #endif
91 #if INCLUDE_JFR
92 #include "jfr/support/jfrTraceIdExtension.hpp"
93 #endif
94
95 // We generally try to create the oops directly when parsing, rather than
96 // allocating temporary data structures and copying the bytes twice. A
97 // temporary area is only needed when parsing utf8 entries in the constant
98 // pool and when parsing line number tables.
99
100 // We add assert in debug mode when class format is not checked.
101
102 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
103 #define JAVA_MIN_SUPPORTED_VERSION 45
104 #define JAVA_PREVIEW_MINOR_VERSION 65535
105
106 // Used for two backward compatibility reasons:
107 // - to check for new additions to the class file format in JDK1.5
108 // - to check for bug fixes in the format checker in JDK1.5
109 #define JAVA_1_5_VERSION 49
110
111 // Used for backward compatibility reasons:
112 // - to check for javac bug fixes that happened after 1.5
113 // - also used as the max version when running in jdk6
114 #define JAVA_6_VERSION 50
115
116 // Used for backward compatibility reasons:
117 // - to disallow argument and require ACC_STATIC for <clinit> methods
118 #define JAVA_7_VERSION 51
119
120 // Extension method support.
121 #define JAVA_8_VERSION 52
122
123 #define JAVA_9_VERSION 53
124
125 #define JAVA_10_VERSION 54
126
127 #define JAVA_11_VERSION 55
128
129 #define JAVA_12_VERSION 56
130
131 #define JAVA_13_VERSION 57
132
133 #define JAVA_14_VERSION 58
134
135 #define JAVA_15_VERSION 59
136
137 #define JAVA_16_VERSION 60
138
139 #define JAVA_17_VERSION 61
140
141 #define JAVA_18_VERSION 62
142
143 #define JAVA_19_VERSION 63
144
145 #define JAVA_20_VERSION 64
146
147 #define JAVA_21_VERSION 65
148
149 #define JAVA_22_VERSION 66
150
151 #define JAVA_23_VERSION 67
152
153 #define JAVA_24_VERSION 68
154
155 #define JAVA_25_VERSION 69
156
157 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
158 assert((bad_constant == JVM_CONSTANT_Module ||
159 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
160 "Unexpected bad constant pool entry");
161 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
162 }
163
164 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
165 ConstantPool* cp,
166 const int length,
167 TRAPS) {
168 assert(stream != nullptr, "invariant");
169 assert(cp != nullptr, "invariant");
170
171 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
172 // this function (_current can be allocated in a register, with scalar
173 // replacement of aggregates). The _current pointer is copied back to
174 // stream() when this function returns. DON'T call another method within
175 // this method that uses stream().
176 const ClassFileStream cfs1 = *stream;
177 const ClassFileStream* const cfs = &cfs1;
178
179 debug_only(const u1* const old_current = stream->current();)
180
181 // Used for batching symbol allocations.
182 const char* names[SymbolTable::symbol_alloc_batch_size];
183 int lengths[SymbolTable::symbol_alloc_batch_size];
184 int indices[SymbolTable::symbol_alloc_batch_size];
185 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
186 int names_count = 0;
187
188 // parsing Index 0 is unused
189 for (int index = 1; index < length; index++) {
190 // Each of the following case guarantees one more byte in the stream
191 // for the following tag or the access_flags following constant pool,
192 // so we don't need bounds-check for reading tag.
193 const u1 tag = cfs->get_u1_fast();
194 switch (tag) {
195 case JVM_CONSTANT_Class : {
196 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
197 const u2 name_index = cfs->get_u2_fast();
198 cp->klass_index_at_put(index, name_index);
199 break;
200 }
201 case JVM_CONSTANT_Fieldref: {
202 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
203 const u2 class_index = cfs->get_u2_fast();
204 const u2 name_and_type_index = cfs->get_u2_fast();
205 cp->field_at_put(index, class_index, name_and_type_index);
206 break;
207 }
208 case JVM_CONSTANT_Methodref: {
209 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
210 const u2 class_index = cfs->get_u2_fast();
211 const u2 name_and_type_index = cfs->get_u2_fast();
212 cp->method_at_put(index, class_index, name_and_type_index);
213 break;
214 }
215 case JVM_CONSTANT_InterfaceMethodref: {
216 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
217 const u2 class_index = cfs->get_u2_fast();
218 const u2 name_and_type_index = cfs->get_u2_fast();
219 cp->interface_method_at_put(index, class_index, name_and_type_index);
220 break;
221 }
222 case JVM_CONSTANT_String : {
223 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
224 const u2 string_index = cfs->get_u2_fast();
225 cp->string_index_at_put(index, string_index);
226 break;
227 }
228 case JVM_CONSTANT_MethodHandle :
229 case JVM_CONSTANT_MethodType: {
230 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
231 classfile_parse_error(
232 "Class file version does not support constant tag %u in class file %s",
233 tag, THREAD);
234 return;
235 }
236 if (tag == JVM_CONSTANT_MethodHandle) {
237 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
238 const u1 ref_kind = cfs->get_u1_fast();
239 const u2 method_index = cfs->get_u2_fast();
240 cp->method_handle_index_at_put(index, ref_kind, method_index);
241 }
242 else if (tag == JVM_CONSTANT_MethodType) {
243 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
244 const u2 signature_index = cfs->get_u2_fast();
245 cp->method_type_index_at_put(index, signature_index);
246 }
247 else {
248 ShouldNotReachHere();
249 }
250 break;
251 }
252 case JVM_CONSTANT_Dynamic : {
253 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
254 classfile_parse_error(
255 "Class file version does not support constant tag %u in class file %s",
256 tag, THREAD);
257 return;
258 }
259 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
260 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
261 const u2 name_and_type_index = cfs->get_u2_fast();
262 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
263 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
264 }
265 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
266 break;
267 }
268 case JVM_CONSTANT_InvokeDynamic : {
269 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
270 classfile_parse_error(
271 "Class file version does not support constant tag %u in class file %s",
272 tag, THREAD);
273 return;
274 }
275 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
276 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
277 const u2 name_and_type_index = cfs->get_u2_fast();
278 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
279 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
280 }
281 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
282 break;
283 }
284 case JVM_CONSTANT_Integer: {
285 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
286 const u4 bytes = cfs->get_u4_fast();
287 cp->int_at_put(index, (jint)bytes);
288 break;
289 }
290 case JVM_CONSTANT_Float: {
291 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
292 const u4 bytes = cfs->get_u4_fast();
293 cp->float_at_put(index, *(jfloat*)&bytes);
294 break;
295 }
296 case JVM_CONSTANT_Long: {
297 // A mangled type might cause you to overrun allocated memory
298 guarantee_property(index + 1 < length,
299 "Invalid constant pool entry %u in class file %s",
300 index,
301 CHECK);
302 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
303 const u8 bytes = cfs->get_u8_fast();
304 cp->long_at_put(index, bytes);
305 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
306 break;
307 }
308 case JVM_CONSTANT_Double: {
309 // A mangled type might cause you to overrun allocated memory
310 guarantee_property(index+1 < length,
311 "Invalid constant pool entry %u in class file %s",
312 index,
313 CHECK);
314 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
315 const u8 bytes = cfs->get_u8_fast();
316 cp->double_at_put(index, *(jdouble*)&bytes);
317 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
318 break;
319 }
320 case JVM_CONSTANT_NameAndType: {
321 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
322 const u2 name_index = cfs->get_u2_fast();
323 const u2 signature_index = cfs->get_u2_fast();
324 cp->name_and_type_at_put(index, name_index, signature_index);
325 break;
326 }
327 case JVM_CONSTANT_Utf8 : {
328 cfs->guarantee_more(2, CHECK); // utf8_length
329 u2 utf8_length = cfs->get_u2_fast();
330 const u1* utf8_buffer = cfs->current();
331 assert(utf8_buffer != nullptr, "null utf8 buffer");
332 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
333 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
334 cfs->skip_u1_fast(utf8_length);
335
336 // Before storing the symbol, make sure it's legal
337 if (_need_verify) {
338 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
339 }
340
341 unsigned int hash;
342 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
343 utf8_length,
344 hash);
345 if (result == nullptr) {
346 names[names_count] = (const char*)utf8_buffer;
347 lengths[names_count] = utf8_length;
348 indices[names_count] = index;
349 hashValues[names_count++] = hash;
350 if (names_count == SymbolTable::symbol_alloc_batch_size) {
351 SymbolTable::new_symbols(_loader_data,
352 constantPoolHandle(THREAD, cp),
353 names_count,
354 names,
355 lengths,
356 indices,
357 hashValues);
358 names_count = 0;
359 }
360 } else {
361 cp->symbol_at_put(index, result);
362 }
363 break;
364 }
365 case JVM_CONSTANT_Module:
366 case JVM_CONSTANT_Package: {
367 // Record that an error occurred in these two cases but keep parsing so
368 // that ACC_Module can be checked for in the access_flags. Need to
369 // throw NoClassDefFoundError in that case.
370 if (_major_version >= JAVA_9_VERSION) {
371 cfs->guarantee_more(3, CHECK);
372 cfs->get_u2_fast();
373 set_class_bad_constant_seen(tag);
374 break;
375 }
376 }
377 default: {
378 classfile_parse_error("Unknown constant tag %u in class file %s",
379 tag,
380 THREAD);
381 return;
382 }
383 } // end of switch(tag)
384 } // end of for
385
386 // Allocate the remaining symbols
387 if (names_count > 0) {
388 SymbolTable::new_symbols(_loader_data,
389 constantPoolHandle(THREAD, cp),
390 names_count,
391 names,
392 lengths,
393 indices,
394 hashValues);
395 }
396
397 // Copy _current pointer of local copy back to stream.
398 assert(stream->current() == old_current, "non-exclusive use of stream");
399 stream->set_current(cfs1.current());
400
401 }
402
403 static inline bool valid_cp_range(int index, int length) {
404 return (index > 0 && index < length);
405 }
406
407 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
408 assert(cp != nullptr, "invariant");
409 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
410 return cp->symbol_at(index);
411 }
412 return nullptr;
413 }
414
415 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
416 ConstantPool* const cp,
417 const int length,
418 TRAPS) {
419 assert(cp != nullptr, "invariant");
420 assert(stream != nullptr, "invariant");
421
422 // parsing constant pool entries
423 parse_constant_pool_entries(stream, cp, length, CHECK);
424 if (class_bad_constant_seen() != 0) {
425 // a bad CP entry has been detected previously so stop parsing and just return.
426 return;
427 }
428
429 int index = 1; // declared outside of loops for portability
430 int num_klasses = 0;
431
432 // first verification pass - validate cross references
433 // and fixup class and string constants
434 for (index = 1; index < length; index++) { // Index 0 is unused
435 const jbyte tag = cp->tag_at(index).value();
436 switch (tag) {
437 case JVM_CONSTANT_Class: {
438 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
439 break;
440 }
441 case JVM_CONSTANT_Fieldref:
442 // fall through
443 case JVM_CONSTANT_Methodref:
444 // fall through
445 case JVM_CONSTANT_InterfaceMethodref: {
446 if (!_need_verify) break;
447 const int klass_ref_index = cp->uncached_klass_ref_index_at(index);
448 const int name_and_type_ref_index = cp->uncached_name_and_type_ref_index_at(index);
449 guarantee_property(valid_klass_reference_at(klass_ref_index),
450 "Invalid constant pool index %u in class file %s",
451 klass_ref_index, CHECK);
452 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
453 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
454 "Invalid constant pool index %u in class file %s",
455 name_and_type_ref_index, CHECK);
456 break;
457 }
458 case JVM_CONSTANT_String: {
459 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
460 break;
461 }
462 case JVM_CONSTANT_Integer:
463 break;
464 case JVM_CONSTANT_Float:
465 break;
466 case JVM_CONSTANT_Long:
467 case JVM_CONSTANT_Double: {
468 index++;
469 guarantee_property(
470 (index < length && cp->tag_at(index).is_invalid()),
471 "Improper constant pool long/double index %u in class file %s",
472 index, CHECK);
473 break;
474 }
475 case JVM_CONSTANT_NameAndType: {
476 if (!_need_verify) break;
477 const int name_ref_index = cp->name_ref_index_at(index);
478 const int signature_ref_index = cp->signature_ref_index_at(index);
479 guarantee_property(valid_symbol_at(name_ref_index),
480 "Invalid constant pool index %u in class file %s",
481 name_ref_index, CHECK);
482 guarantee_property(valid_symbol_at(signature_ref_index),
483 "Invalid constant pool index %u in class file %s",
484 signature_ref_index, CHECK);
485 break;
486 }
487 case JVM_CONSTANT_Utf8:
488 break;
489 case JVM_CONSTANT_UnresolvedClass: // fall-through
490 case JVM_CONSTANT_UnresolvedClassInError: {
491 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
492 break;
493 }
494 case JVM_CONSTANT_ClassIndex: {
495 const int class_index = cp->klass_index_at(index);
496 guarantee_property(valid_symbol_at(class_index),
497 "Invalid constant pool index %u in class file %s",
498 class_index, CHECK);
499 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
500 break;
501 }
502 case JVM_CONSTANT_StringIndex: {
503 const int string_index = cp->string_index_at(index);
504 guarantee_property(valid_symbol_at(string_index),
505 "Invalid constant pool index %u in class file %s",
506 string_index, CHECK);
507 Symbol* const sym = cp->symbol_at(string_index);
508 cp->unresolved_string_at_put(index, sym);
509 break;
510 }
511 case JVM_CONSTANT_MethodHandle: {
512 const int ref_index = cp->method_handle_index_at(index);
513 guarantee_property(valid_cp_range(ref_index, length),
514 "Invalid constant pool index %u in class file %s",
515 ref_index, CHECK);
516 const constantTag tag = cp->tag_at(ref_index);
517 const int ref_kind = cp->method_handle_ref_kind_at(index);
518
519 switch (ref_kind) {
520 case JVM_REF_getField:
521 case JVM_REF_getStatic:
522 case JVM_REF_putField:
523 case JVM_REF_putStatic: {
524 guarantee_property(
525 tag.is_field(),
526 "Invalid constant pool index %u in class file %s (not a field)",
527 ref_index, CHECK);
528 break;
529 }
530 case JVM_REF_invokeVirtual:
531 case JVM_REF_newInvokeSpecial: {
532 guarantee_property(
533 tag.is_method(),
534 "Invalid constant pool index %u in class file %s (not a method)",
535 ref_index, CHECK);
536 break;
537 }
538 case JVM_REF_invokeStatic:
539 case JVM_REF_invokeSpecial: {
540 guarantee_property(
541 tag.is_method() ||
542 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
543 "Invalid constant pool index %u in class file %s (not a method)",
544 ref_index, CHECK);
545 break;
546 }
547 case JVM_REF_invokeInterface: {
548 guarantee_property(
549 tag.is_interface_method(),
550 "Invalid constant pool index %u in class file %s (not an interface method)",
551 ref_index, CHECK);
552 break;
553 }
554 default: {
555 classfile_parse_error(
556 "Bad method handle kind at constant pool index %u in class file %s",
557 index, THREAD);
558 return;
559 }
560 } // switch(refkind)
561 // Keep the ref_index unchanged. It will be indirected at link-time.
562 break;
563 } // case MethodHandle
564 case JVM_CONSTANT_MethodType: {
565 const int ref_index = cp->method_type_index_at(index);
566 guarantee_property(valid_symbol_at(ref_index),
567 "Invalid constant pool index %u in class file %s",
568 ref_index, CHECK);
569 break;
570 }
571 case JVM_CONSTANT_Dynamic: {
572 const int name_and_type_ref_index =
573 cp->bootstrap_name_and_type_ref_index_at(index);
574
575 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
576 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
577 "Invalid constant pool index %u in class file %s",
578 name_and_type_ref_index, CHECK);
579 // bootstrap specifier index must be checked later,
580 // when BootstrapMethods attr is available
581
582 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
583 cp->set_has_dynamic_constant();
584 break;
585 }
586 case JVM_CONSTANT_InvokeDynamic: {
587 const int name_and_type_ref_index =
588 cp->bootstrap_name_and_type_ref_index_at(index);
589
590 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
591 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
592 "Invalid constant pool index %u in class file %s",
593 name_and_type_ref_index, CHECK);
594 // bootstrap specifier index must be checked later,
595 // when BootstrapMethods attr is available
596 break;
597 }
598 default: {
599 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
600 ShouldNotReachHere();
601 break;
602 }
603 } // switch(tag)
604 } // end of for
605
606 cp->allocate_resolved_klasses(_loader_data, num_klasses, CHECK);
607
608 if (!_need_verify) {
609 return;
610 }
611
612 // second verification pass - checks the strings are of the right format.
613 // but not yet to the other entries
614 for (index = 1; index < length; index++) {
615 const jbyte tag = cp->tag_at(index).value();
616 switch (tag) {
617 case JVM_CONSTANT_UnresolvedClass: {
618 const Symbol* const class_name = cp->klass_name_at(index);
619 // check the name
620 verify_legal_class_name(class_name, CHECK);
621 break;
622 }
623 case JVM_CONSTANT_NameAndType: {
624 if (_need_verify) {
625 const int sig_index = cp->signature_ref_index_at(index);
626 const int name_index = cp->name_ref_index_at(index);
627 const Symbol* const name = cp->symbol_at(name_index);
628 const Symbol* const sig = cp->symbol_at(sig_index);
629 guarantee_property(sig->utf8_length() != 0,
630 "Illegal zero length constant pool entry at %d in class %s",
631 sig_index, CHECK);
632 guarantee_property(name->utf8_length() != 0,
633 "Illegal zero length constant pool entry at %d in class %s",
634 name_index, CHECK);
635
636 if (Signature::is_method(sig)) {
637 // Format check method name and signature
638 verify_legal_method_name(name, CHECK);
639 verify_legal_method_signature(name, sig, CHECK);
640 } else {
641 // Format check field name and signature
642 verify_legal_field_name(name, CHECK);
643 verify_legal_field_signature(name, sig, CHECK);
644 }
645 }
646 break;
647 }
648 case JVM_CONSTANT_Dynamic: {
649 const int name_and_type_ref_index =
650 cp->uncached_name_and_type_ref_index_at(index);
651 // already verified to be utf8
652 const int name_ref_index =
653 cp->name_ref_index_at(name_and_type_ref_index);
654 // already verified to be utf8
655 const int signature_ref_index =
656 cp->signature_ref_index_at(name_and_type_ref_index);
657 const Symbol* const name = cp->symbol_at(name_ref_index);
658 const Symbol* const signature = cp->symbol_at(signature_ref_index);
659 if (_need_verify) {
660 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
661 // Need only to be sure signature is the right type.
662 if (Signature::is_method(signature)) {
663 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
664 }
665 }
666 break;
667 }
668 case JVM_CONSTANT_InvokeDynamic:
669 case JVM_CONSTANT_Fieldref:
670 case JVM_CONSTANT_Methodref:
671 case JVM_CONSTANT_InterfaceMethodref: {
672 const int name_and_type_ref_index =
673 cp->uncached_name_and_type_ref_index_at(index);
674 // already verified to be utf8
675 const int name_ref_index =
676 cp->name_ref_index_at(name_and_type_ref_index);
677 // already verified to be utf8
678 const int signature_ref_index =
679 cp->signature_ref_index_at(name_and_type_ref_index);
680 const Symbol* const name = cp->symbol_at(name_ref_index);
681 const Symbol* const signature = cp->symbol_at(signature_ref_index);
682 if (tag == JVM_CONSTANT_Fieldref) {
683 if (_need_verify) {
684 // Field name and signature are verified above, when iterating NameAndType_info.
685 // Need only to be sure signature is non-zero length and the right type.
686 if (Signature::is_method(signature)) {
687 throwIllegalSignature("Field", name, signature, CHECK);
688 }
689 }
690 } else {
691 if (_need_verify) {
692 // Method name and signature are individually verified above, when iterating
693 // NameAndType_info. Need to check here that signature is non-zero length and
694 // the right type.
695 if (!Signature::is_method(signature)) {
696 throwIllegalSignature("Method", name, signature, CHECK);
697 }
698 }
699 // If a class method name begins with '<', it must be "<init>" and have void signature.
700 const unsigned int name_len = name->utf8_length();
701 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
702 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
703 if (name != vmSymbols::object_initializer_name()) {
704 classfile_parse_error(
705 "Bad method name at constant pool index %u in class file %s",
706 name_ref_index, THREAD);
707 return;
708 } else if (!Signature::is_void_method(signature)) { // must have void signature.
709 throwIllegalSignature("Method", name, signature, CHECK);
710 }
711 }
712 }
713 break;
714 }
715 case JVM_CONSTANT_MethodHandle: {
716 const int ref_index = cp->method_handle_index_at(index);
717 const int ref_kind = cp->method_handle_ref_kind_at(index);
718 switch (ref_kind) {
719 case JVM_REF_invokeVirtual:
720 case JVM_REF_invokeStatic:
721 case JVM_REF_invokeSpecial:
722 case JVM_REF_newInvokeSpecial: {
723 const int name_and_type_ref_index =
724 cp->uncached_name_and_type_ref_index_at(ref_index);
725 const int name_ref_index =
726 cp->name_ref_index_at(name_and_type_ref_index);
727 const Symbol* const name = cp->symbol_at(name_ref_index);
728 if (ref_kind == JVM_REF_newInvokeSpecial) {
729 if (name != vmSymbols::object_initializer_name()) {
730 classfile_parse_error(
731 "Bad constructor name at constant pool index %u in class file %s",
732 name_ref_index, THREAD);
733 return;
734 }
735 } else {
736 if (name == vmSymbols::object_initializer_name()) {
737 classfile_parse_error(
738 "Bad method name at constant pool index %u in class file %s",
739 name_ref_index, THREAD);
740 return;
741 }
742 }
743 break;
744 }
745 // Other ref_kinds are already fully checked in previous pass.
746 } // switch(ref_kind)
747 break;
748 }
749 case JVM_CONSTANT_MethodType: {
750 const Symbol* const no_name = vmSymbols::type_name(); // place holder
751 const Symbol* const signature = cp->method_type_signature_at(index);
752 verify_legal_method_signature(no_name, signature, CHECK);
753 break;
754 }
755 case JVM_CONSTANT_Utf8: {
756 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
757 }
758 } // switch(tag)
759 } // end of for
760 }
761
762 class NameSigHash: public ResourceObj {
763 public:
764 const Symbol* _name; // name
765 const Symbol* _sig; // signature
766
767 static const int HASH_ROW_SIZE = 256;
768
769 NameSigHash(Symbol* name, Symbol* sig) :
770 _name(name),
771 _sig(sig) {}
772
773 static unsigned int hash(NameSigHash const& namesig) {
774 return namesig._name->identity_hash() ^ namesig._sig->identity_hash();
775 }
776
777 static bool equals(NameSigHash const& e0, NameSigHash const& e1) {
778 return (e0._name == e1._name) &&
779 (e0._sig == e1._sig);
780 }
781 };
782
783 using NameSigHashtable = ResourceHashtable<NameSigHash, int,
784 NameSigHash::HASH_ROW_SIZE,
785 AnyObj::RESOURCE_AREA, mtInternal,
786 &NameSigHash::hash, &NameSigHash::equals>;
787
788 // Side-effects: populates the _local_interfaces field
789 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
790 const int itfs_len,
791 ConstantPool* const cp,
792 bool* const has_nonstatic_concrete_methods,
793 TRAPS) {
794 assert(stream != nullptr, "invariant");
795 assert(cp != nullptr, "invariant");
796 assert(has_nonstatic_concrete_methods != nullptr, "invariant");
797
798 if (itfs_len == 0) {
799 _local_interfaces = Universe::the_empty_instance_klass_array();
800 } else {
801 assert(itfs_len > 0, "only called for len>0");
802 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, nullptr, CHECK);
803
804 int index;
805 for (index = 0; index < itfs_len; index++) {
806 const u2 interface_index = stream->get_u2(CHECK);
807 Klass* interf;
808 guarantee_property(
809 valid_klass_reference_at(interface_index),
810 "Interface name has bad constant pool index %u in class file %s",
811 interface_index, CHECK);
812 if (cp->tag_at(interface_index).is_klass()) {
813 interf = cp->resolved_klass_at(interface_index);
814 } else {
815 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
816
817 // Don't need to check legal name because it's checked when parsing constant pool.
818 // But need to make sure it's not an array type.
819 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
820 "Bad interface name in class file %s", CHECK);
821
822 // Call resolve on the interface class name with class circularity checking
823 interf = SystemDictionary::resolve_super_or_fail(_class_name,
824 unresolved_klass,
825 Handle(THREAD, _loader_data->class_loader()),
826 false, CHECK);
827 }
828
829 if (!interf->is_interface()) {
830 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
831 err_msg("class %s can not implement %s, because it is not an interface (%s)",
832 _class_name->as_klass_external_name(),
833 interf->external_name(),
834 interf->class_in_module_of_loader()));
835 }
836
837 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
838 *has_nonstatic_concrete_methods = true;
839 }
840 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
841 }
842
843 if (!_need_verify || itfs_len <= 1) {
844 return;
845 }
846
847 // Check if there's any duplicates in interfaces
848 ResourceMark rm(THREAD);
849 // Set containing interface names
850 ResourceHashtable<Symbol*, int>* interface_names = new ResourceHashtable<Symbol*, int>();
851 for (index = 0; index < itfs_len; index++) {
852 const InstanceKlass* const k = _local_interfaces->at(index);
853 Symbol* interface_name = k->name();
854 // If no duplicates, add (name, nullptr) in hashtable interface_names.
855 if (!interface_names->put(interface_name, 0)) {
856 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
857 interface_name->as_C_string(), THREAD);
858 return;
859 }
860 }
861 }
862 }
863
864 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
865 int constantvalue_index,
866 int signature_index,
867 TRAPS) const {
868 // Make sure the constant pool entry is of a type appropriate to this field
869 guarantee_property(
870 (constantvalue_index > 0 &&
871 constantvalue_index < cp->length()),
872 "Bad initial value index %u in ConstantValue attribute in class file %s",
873 constantvalue_index, CHECK);
874
875 const constantTag value_type = cp->tag_at(constantvalue_index);
876 switch(cp->basic_type_for_signature_at(signature_index)) {
877 case T_LONG: {
878 guarantee_property(value_type.is_long(),
879 "Inconsistent constant value type in class file %s",
880 CHECK);
881 break;
882 }
883 case T_FLOAT: {
884 guarantee_property(value_type.is_float(),
885 "Inconsistent constant value type in class file %s",
886 CHECK);
887 break;
888 }
889 case T_DOUBLE: {
890 guarantee_property(value_type.is_double(),
891 "Inconsistent constant value type in class file %s",
892 CHECK);
893 break;
894 }
895 case T_BYTE:
896 case T_CHAR:
897 case T_SHORT:
898 case T_BOOLEAN:
899 case T_INT: {
900 guarantee_property(value_type.is_int(),
901 "Inconsistent constant value type in class file %s",
902 CHECK);
903 break;
904 }
905 case T_OBJECT: {
906 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
907 && value_type.is_string()),
908 "Bad string initial value in class file %s",
909 CHECK);
910 break;
911 }
912 default: {
913 classfile_parse_error("Unable to set initial value %u in class file %s",
914 constantvalue_index,
915 THREAD);
916 }
917 }
918 }
919
920 class AnnotationCollector : public ResourceObj{
921 public:
922 enum Location { _in_field, _in_method, _in_class };
923 enum ID {
924 _unknown = 0,
925 _method_CallerSensitive,
926 _method_ForceInline,
927 _method_DontInline,
928 _method_ChangesCurrentThread,
929 _method_JvmtiHideEvents,
930 _method_JvmtiMountTransition,
931 _method_InjectedProfile,
932 _method_LambdaForm_Compiled,
933 _method_Hidden,
934 _method_Scoped,
935 _method_IntrinsicCandidate,
936 _jdk_internal_vm_annotation_Contended,
937 _field_Stable,
938 _jdk_internal_vm_annotation_ReservedStackAccess,
939 _jdk_internal_ValueBased,
940 _java_lang_Deprecated,
941 _java_lang_Deprecated_for_removal,
942 _annotation_LIMIT
943 };
944 const Location _location;
945 int _annotations_present;
946 u2 _contended_group;
947
948 AnnotationCollector(Location location)
949 : _location(location), _annotations_present(0), _contended_group(0)
950 {
951 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
952 }
953 // If this annotation name has an ID, report it (or _none).
954 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
955 // Set the annotation name:
956 void set_annotation(ID id) {
957 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
958 _annotations_present |= (int)nth_bit((int)id);
959 }
960
961 void remove_annotation(ID id) {
962 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
963 _annotations_present &= (int)~nth_bit((int)id);
964 }
965
966 // Report if the annotation is present.
967 bool has_any_annotations() const { return _annotations_present != 0; }
968 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
969
970 void set_contended_group(u2 group) { _contended_group = group; }
971 u2 contended_group() const { return _contended_group; }
972
973 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
974
975 void set_stable(bool stable) { set_annotation(_field_Stable); }
976 bool is_stable() const { return has_annotation(_field_Stable); }
977 };
978
979 // This class also doubles as a holder for metadata cleanup.
980 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
981 private:
982 ClassLoaderData* _loader_data;
983 AnnotationArray* _field_annotations;
984 AnnotationArray* _field_type_annotations;
985 public:
986 FieldAnnotationCollector(ClassLoaderData* loader_data) :
987 AnnotationCollector(_in_field),
988 _loader_data(loader_data),
989 _field_annotations(nullptr),
990 _field_type_annotations(nullptr) {}
991 ~FieldAnnotationCollector();
992 void apply_to(FieldInfo* f);
993 AnnotationArray* field_annotations() { return _field_annotations; }
994 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
995
996 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
997 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
998 };
999
1000 class MethodAnnotationCollector : public AnnotationCollector{
1001 public:
1002 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1003 void apply_to(const methodHandle& m);
1004 };
1005
1006 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1007 public:
1008 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1009 void apply_to(InstanceKlass* ik);
1010 };
1011
1012
1013 static int skip_annotation_value(const u1*, int, int); // fwd decl
1014
1015 // Safely increment index by val if does not pass limit
1016 #define SAFE_ADD(index, limit, val) \
1017 if (index >= limit - val) return limit; \
1018 index += val;
1019
1020 // Skip an annotation. Return >=limit if there is any problem.
1021 static int skip_annotation(const u1* buffer, int limit, int index) {
1022 assert(buffer != nullptr, "invariant");
1023 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1024 // value := switch (tag:u1) { ... }
1025 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1026 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1027 while (--nmem >= 0 && index < limit) {
1028 SAFE_ADD(index, limit, 2); // skip member
1029 index = skip_annotation_value(buffer, limit, index);
1030 }
1031 return index;
1032 }
1033
1034 // Skip an annotation value. Return >=limit if there is any problem.
1035 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1036 assert(buffer != nullptr, "invariant");
1037
1038 // value := switch (tag:u1) {
1039 // case B, C, I, S, Z, D, F, J, c: con:u2;
1040 // case e: e_class:u2 e_name:u2;
1041 // case s: s_con:u2;
1042 // case [: do(nval:u2) {value};
1043 // case @: annotation;
1044 // case s: s_con:u2;
1045 // }
1046 SAFE_ADD(index, limit, 1); // read tag
1047 const u1 tag = buffer[index - 1];
1048 switch (tag) {
1049 case 'B':
1050 case 'C':
1051 case 'I':
1052 case 'S':
1053 case 'Z':
1054 case 'D':
1055 case 'F':
1056 case 'J':
1057 case 'c':
1058 case 's':
1059 SAFE_ADD(index, limit, 2); // skip con or s_con
1060 break;
1061 case 'e':
1062 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1063 break;
1064 case '[':
1065 {
1066 SAFE_ADD(index, limit, 2); // read nval
1067 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1068 while (--nval >= 0 && index < limit) {
1069 index = skip_annotation_value(buffer, limit, index);
1070 }
1071 }
1072 break;
1073 case '@':
1074 index = skip_annotation(buffer, limit, index);
1075 break;
1076 default:
1077 return limit; // bad tag byte
1078 }
1079 return index;
1080 }
1081
1082 // Sift through annotations, looking for those significant to the VM:
1083 static void parse_annotations(const ConstantPool* const cp,
1084 const u1* buffer, int limit,
1085 AnnotationCollector* coll,
1086 ClassLoaderData* loader_data,
1087 const bool can_access_vm_annotations) {
1088
1089 assert(cp != nullptr, "invariant");
1090 assert(buffer != nullptr, "invariant");
1091 assert(coll != nullptr, "invariant");
1092 assert(loader_data != nullptr, "invariant");
1093
1094 // annotations := do(nann:u2) {annotation}
1095 int index = 2; // read nann
1096 if (index >= limit) return;
1097 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1098 enum { // initial annotation layout
1099 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1100 count_off = 2, // u2 such as 1 (one value)
1101 member_off = 4, // utf8 such as 'value'
1102 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1103 e_tag_val = 'e',
1104 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1105 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1106 e_size = 11, // end of 'e' annotation
1107 c_tag_val = 'c', // payload is type
1108 c_con_off = 7, // utf8 payload, such as 'I'
1109 c_size = 9, // end of 'c' annotation
1110 s_tag_val = 's', // payload is String
1111 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1112 s_size = 9,
1113 b_tag_val = 'Z', // payload is boolean
1114 min_size = 6 // smallest possible size (zero members)
1115 };
1116 // Cannot add min_size to index in case of overflow MAX_INT
1117 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1118 int index0 = index;
1119 index = skip_annotation(buffer, limit, index);
1120 const u1* const abase = buffer + index0;
1121 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1122 const int count = Bytes::get_Java_u2((address)abase + count_off);
1123 const Symbol* const aname = check_symbol_at(cp, atype);
1124 if (aname == nullptr) break; // invalid annotation name
1125 const Symbol* member = nullptr;
1126 if (count >= 1) {
1127 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1128 member = check_symbol_at(cp, member_index);
1129 if (member == nullptr) break; // invalid member name
1130 }
1131
1132 // Here is where parsing particular annotations will take place.
1133 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1134 if (AnnotationCollector::_unknown == id) continue;
1135 coll->set_annotation(id);
1136 if (AnnotationCollector::_java_lang_Deprecated == id) {
1137 // @Deprecated can specify forRemoval=true, which we need
1138 // to record for JFR to use. If the annotation is not well-formed
1139 // then we may not be able to determine that.
1140 const u1* offset = abase + member_off;
1141 // There are only 2 members in @Deprecated.
1142 int n_members = MIN2(count, 2);
1143 for (int i = 0; i < n_members; ++i) {
1144 int member_index = Bytes::get_Java_u2((address)offset);
1145 offset += 2;
1146 member = check_symbol_at(cp, member_index);
1147 if (member == vmSymbols::since() &&
1148 (*((address)offset) == s_tag_val)) {
1149 // Found `since` first so skip over it
1150 offset += 3;
1151 }
1152 else if (member == vmSymbols::for_removal() &&
1153 (*((address)offset) == b_tag_val)) {
1154 const u2 boolean_value_index = Bytes::get_Java_u2((address)offset + 1);
1155 // No guarantee the entry is valid so check it refers to an int in the CP.
1156 if (cp->is_within_bounds(boolean_value_index) &&
1157 cp->tag_at(boolean_value_index).is_int() &&
1158 cp->int_at(boolean_value_index) == 1) {
1159 // forRemoval == true
1160 coll->set_annotation(AnnotationCollector::_java_lang_Deprecated_for_removal);
1161 }
1162 break; // no need to check further
1163 }
1164 else {
1165 // This @Deprecated annotation is malformed so we don't try to
1166 // determine whether forRemoval is set.
1167 break;
1168 }
1169 }
1170 continue; // proceed to next annotation
1171 }
1172
1173 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1174 // @Contended can optionally specify the contention group.
1175 //
1176 // Contended group defines the equivalence class over the fields:
1177 // the fields within the same contended group are not treated distinct.
1178 // The only exception is default group, which does not incur the
1179 // equivalence. Naturally, contention group for classes is meaningless.
1180 //
1181 // While the contention group is specified as String, annotation
1182 // values are already interned, and we might as well use the constant
1183 // pool index as the group tag.
1184 //
1185 u2 group_index = 0; // default contended group
1186 if (count == 1
1187 && s_size == (index - index0) // match size
1188 && s_tag_val == *(abase + tag_off)
1189 && member == vmSymbols::value_name()) {
1190 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1191 // No guarantee the group_index is valid so check it refers to a
1192 // symbol in the CP.
1193 if (cp->is_within_bounds(group_index) &&
1194 cp->tag_at(group_index).is_utf8()) {
1195 // Seems valid, so check for empty string and reset
1196 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1197 group_index = 0; // default contended group
1198 }
1199 } else {
1200 // Not valid so use the default
1201 group_index = 0;
1202 }
1203 }
1204 coll->set_contended_group(group_index);
1205 continue; // proceed to next annotation
1206 }
1207 }
1208 }
1209
1210
1211 // Parse attributes for a field.
1212 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1213 u2 attributes_count,
1214 bool is_static, u2 signature_index,
1215 u2* const constantvalue_index_addr,
1216 bool* const is_synthetic_addr,
1217 u2* const generic_signature_index_addr,
1218 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1219 TRAPS) {
1220 assert(cfs != nullptr, "invariant");
1221 assert(constantvalue_index_addr != nullptr, "invariant");
1222 assert(is_synthetic_addr != nullptr, "invariant");
1223 assert(generic_signature_index_addr != nullptr, "invariant");
1224 assert(parsed_annotations != nullptr, "invariant");
1225 assert(attributes_count > 0, "attributes_count should be greater than 0");
1226
1227 u2 constantvalue_index = 0;
1228 u2 generic_signature_index = 0;
1229 bool is_synthetic = false;
1230 const u1* runtime_visible_annotations = nullptr;
1231 int runtime_visible_annotations_length = 0;
1232 const u1* runtime_visible_type_annotations = nullptr;
1233 int runtime_visible_type_annotations_length = 0;
1234 bool runtime_invisible_annotations_exists = false;
1235 bool runtime_invisible_type_annotations_exists = false;
1236 const ConstantPool* const cp = _cp;
1237
1238 while (attributes_count--) {
1239 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1240 const u2 attribute_name_index = cfs->get_u2_fast();
1241 const u4 attribute_length = cfs->get_u4_fast();
1242 guarantee_property(valid_symbol_at(attribute_name_index),
1243 "Invalid field attribute index %u in class file %s",
1244 attribute_name_index,
1245 CHECK);
1246
1247 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1248 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1249 // ignore if non-static
1250 if (constantvalue_index != 0) {
1251 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1252 return;
1253 }
1254 guarantee_property(
1255 attribute_length == 2,
1256 "Invalid ConstantValue field attribute length %u in class file %s",
1257 attribute_length, CHECK);
1258
1259 constantvalue_index = cfs->get_u2(CHECK);
1260 if (_need_verify) {
1261 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1262 }
1263 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1264 if (attribute_length != 0) {
1265 classfile_parse_error(
1266 "Invalid Synthetic field attribute length %u in class file %s",
1267 attribute_length, THREAD);
1268 return;
1269 }
1270 is_synthetic = true;
1271 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1272 if (attribute_length != 0) {
1273 classfile_parse_error(
1274 "Invalid Deprecated field attribute length %u in class file %s",
1275 attribute_length, THREAD);
1276 return;
1277 }
1278 } else if (_major_version >= JAVA_1_5_VERSION) {
1279 if (attribute_name == vmSymbols::tag_signature()) {
1280 if (generic_signature_index != 0) {
1281 classfile_parse_error(
1282 "Multiple Signature attributes for field in class file %s", THREAD);
1283 return;
1284 }
1285 if (attribute_length != 2) {
1286 classfile_parse_error(
1287 "Wrong size %u for field's Signature attribute in class file %s",
1288 attribute_length, THREAD);
1289 return;
1290 }
1291 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1292 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1293 if (runtime_visible_annotations != nullptr) {
1294 classfile_parse_error(
1295 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1296 return;
1297 }
1298 runtime_visible_annotations_length = attribute_length;
1299 runtime_visible_annotations = cfs->current();
1300 assert(runtime_visible_annotations != nullptr, "null visible annotations");
1301 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1302 parse_annotations(cp,
1303 runtime_visible_annotations,
1304 runtime_visible_annotations_length,
1305 parsed_annotations,
1306 _loader_data,
1307 _can_access_vm_annotations);
1308 cfs->skip_u1_fast(runtime_visible_annotations_length);
1309 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1310 if (runtime_invisible_annotations_exists) {
1311 classfile_parse_error(
1312 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1313 return;
1314 }
1315 runtime_invisible_annotations_exists = true;
1316 cfs->skip_u1(attribute_length, CHECK);
1317 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1318 if (runtime_visible_type_annotations != nullptr) {
1319 classfile_parse_error(
1320 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1321 return;
1322 }
1323 runtime_visible_type_annotations_length = attribute_length;
1324 runtime_visible_type_annotations = cfs->current();
1325 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
1326 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1327 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1328 if (runtime_invisible_type_annotations_exists) {
1329 classfile_parse_error(
1330 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1331 return;
1332 } else {
1333 runtime_invisible_type_annotations_exists = true;
1334 }
1335 cfs->skip_u1(attribute_length, CHECK);
1336 } else {
1337 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1338 }
1339 } else {
1340 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1341 }
1342 }
1343
1344 *constantvalue_index_addr = constantvalue_index;
1345 *is_synthetic_addr = is_synthetic;
1346 *generic_signature_index_addr = generic_signature_index;
1347 AnnotationArray* a = allocate_annotations(runtime_visible_annotations,
1348 runtime_visible_annotations_length,
1349 CHECK);
1350 parsed_annotations->set_field_annotations(a);
1351 a = allocate_annotations(runtime_visible_type_annotations,
1352 runtime_visible_type_annotations_length,
1353 CHECK);
1354 parsed_annotations->set_field_type_annotations(a);
1355 return;
1356 }
1357
1358
1359 // Side-effects: populates the _fields, _fields_annotations,
1360 // _fields_type_annotations fields
1361 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1362 bool is_interface,
1363 ConstantPool* cp,
1364 const int cp_size,
1365 u2* const java_fields_count_ptr,
1366 TRAPS) {
1367
1368 assert(cfs != nullptr, "invariant");
1369 assert(cp != nullptr, "invariant");
1370 assert(java_fields_count_ptr != nullptr, "invariant");
1371
1372 assert(nullptr == _fields_annotations, "invariant");
1373 assert(nullptr == _fields_type_annotations, "invariant");
1374
1375 cfs->guarantee_more(2, CHECK); // length
1376 const u2 length = cfs->get_u2_fast();
1377 *java_fields_count_ptr = length;
1378
1379 int num_injected = 0;
1380 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1381 &num_injected);
1382 const int total_fields = length + num_injected;
1383
1384 // Allocate a temporary resource array to collect field data.
1385 // After parsing all fields, data are stored in a UNSIGNED5 compressed stream.
1386 _temp_field_info = new GrowableArray<FieldInfo>(total_fields);
1387
1388 ResourceMark rm(THREAD);
1389 for (int n = 0; n < length; n++) {
1390 // access_flags, name_index, descriptor_index, attributes_count
1391 cfs->guarantee_more(8, CHECK);
1392
1393 AccessFlags access_flags;
1394 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1395 verify_legal_field_modifiers(flags, is_interface, CHECK);
1396 access_flags.set_flags(flags);
1397 FieldInfo::FieldFlags fieldFlags(0);
1398
1399 const u2 name_index = cfs->get_u2_fast();
1400 guarantee_property(valid_symbol_at(name_index),
1401 "Invalid constant pool index %u for field name in class file %s",
1402 name_index, CHECK);
1403 const Symbol* const name = cp->symbol_at(name_index);
1404 verify_legal_field_name(name, CHECK);
1405
1406 const u2 signature_index = cfs->get_u2_fast();
1407 guarantee_property(valid_symbol_at(signature_index),
1408 "Invalid constant pool index %u for field signature in class file %s",
1409 signature_index, CHECK);
1410 const Symbol* const sig = cp->symbol_at(signature_index);
1411 verify_legal_field_signature(name, sig, CHECK);
1412
1413 u2 constantvalue_index = 0;
1414 bool is_synthetic = false;
1415 u2 generic_signature_index = 0;
1416 const bool is_static = access_flags.is_static();
1417 FieldAnnotationCollector parsed_annotations(_loader_data);
1418
1419 const u2 attributes_count = cfs->get_u2_fast();
1420 if (attributes_count > 0) {
1421 parse_field_attributes(cfs,
1422 attributes_count,
1423 is_static,
1424 signature_index,
1425 &constantvalue_index,
1426 &is_synthetic,
1427 &generic_signature_index,
1428 &parsed_annotations,
1429 CHECK);
1430
1431 if (parsed_annotations.field_annotations() != nullptr) {
1432 if (_fields_annotations == nullptr) {
1433 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1434 _loader_data, length, nullptr,
1435 CHECK);
1436 }
1437 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1438 parsed_annotations.set_field_annotations(nullptr);
1439 }
1440 if (parsed_annotations.field_type_annotations() != nullptr) {
1441 if (_fields_type_annotations == nullptr) {
1442 _fields_type_annotations =
1443 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1444 length,
1445 nullptr,
1446 CHECK);
1447 }
1448 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1449 parsed_annotations.set_field_type_annotations(nullptr);
1450 }
1451
1452 if (is_synthetic) {
1453 access_flags.set_is_synthetic();
1454 }
1455 if (generic_signature_index != 0) {
1456 fieldFlags.update_generic(true);
1457 }
1458 }
1459
1460 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1461
1462 // Update number of static oop fields.
1463 if (is_static && is_reference_type(type)) {
1464 _static_oop_count++;
1465 }
1466
1467 FieldInfo fi(access_flags, name_index, signature_index, constantvalue_index, fieldFlags);
1468 fi.set_index(n);
1469 if (fieldFlags.is_generic()) {
1470 fi.set_generic_signature_index(generic_signature_index);
1471 }
1472 parsed_annotations.apply_to(&fi);
1473 if (fi.field_flags().is_contended()) {
1474 _has_contended_fields = true;
1475 }
1476 _temp_field_info->append(fi);
1477 }
1478 assert(_temp_field_info->length() == length, "Must be");
1479
1480 int index = length;
1481 if (num_injected != 0) {
1482 for (int n = 0; n < num_injected; n++) {
1483 // Check for duplicates
1484 if (injected[n].may_be_java) {
1485 const Symbol* const name = injected[n].name();
1486 const Symbol* const signature = injected[n].signature();
1487 bool duplicate = false;
1488 for (int i = 0; i < length; i++) {
1489 const FieldInfo* const f = _temp_field_info->adr_at(i);
1490 if (name == cp->symbol_at(f->name_index()) &&
1491 signature == cp->symbol_at(f->signature_index())) {
1492 // Symbol is desclared in Java so skip this one
1493 duplicate = true;
1494 break;
1495 }
1496 }
1497 if (duplicate) {
1498 // These will be removed from the field array at the end
1499 continue;
1500 }
1501 }
1502
1503 // Injected field
1504 FieldInfo::FieldFlags fflags(0);
1505 fflags.update_injected(true);
1506 AccessFlags aflags;
1507 FieldInfo fi(aflags, (u2)(injected[n].name_index), (u2)(injected[n].signature_index), 0, fflags);
1508 fi.set_index(index);
1509 _temp_field_info->append(fi);
1510 index++;
1511 }
1512 }
1513
1514 assert(_temp_field_info->length() == index, "Must be");
1515
1516 if (_need_verify && length > 1) {
1517 // Check duplicated fields
1518 ResourceMark rm(THREAD);
1519 // Set containing name-signature pairs
1520 NameSigHashtable* names_and_sigs = new NameSigHashtable();
1521 for (int i = 0; i < _temp_field_info->length(); i++) {
1522 NameSigHash name_and_sig(_temp_field_info->adr_at(i)->name(_cp),
1523 _temp_field_info->adr_at(i)->signature(_cp));
1524 // If no duplicates, add name/signature in hashtable names_and_sigs.
1525 if(!names_and_sigs->put(name_and_sig, 0)) {
1526 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1527 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
1528 return;
1529 }
1530 }
1531 }
1532 }
1533
1534
1535 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1536 u4 code_length,
1537 u4 exception_table_length,
1538 TRAPS) {
1539 assert(cfs != nullptr, "invariant");
1540
1541 const unsafe_u2* const exception_table_start = cfs->current();
1542 assert(exception_table_start != nullptr, "null exception table");
1543
1544 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1545 // end_pc,
1546 // handler_pc,
1547 // catch_type_index
1548
1549 // Will check legal target after parsing code array in verifier.
1550 if (_need_verify) {
1551 for (unsigned int i = 0; i < exception_table_length; i++) {
1552 const u2 start_pc = cfs->get_u2_fast();
1553 const u2 end_pc = cfs->get_u2_fast();
1554 const u2 handler_pc = cfs->get_u2_fast();
1555 const u2 catch_type_index = cfs->get_u2_fast();
1556 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1557 "Illegal exception table range in class file %s",
1558 CHECK_NULL);
1559 guarantee_property(handler_pc < code_length,
1560 "Illegal exception table handler in class file %s",
1561 CHECK_NULL);
1562 if (catch_type_index != 0) {
1563 guarantee_property(valid_klass_reference_at(catch_type_index),
1564 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1565 }
1566 }
1567 } else {
1568 cfs->skip_u2_fast(exception_table_length * 4);
1569 }
1570 return exception_table_start;
1571 }
1572
1573 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1574 u4 code_length,
1575 CompressedLineNumberWriteStream**const write_stream,
1576 TRAPS) {
1577
1578 const ClassFileStream* const cfs = _stream;
1579 unsigned int num_entries = cfs->get_u2(CHECK);
1580
1581 // Each entry is a u2 start_pc, and a u2 line_number
1582 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1583
1584 // Verify line number attribute and table length
1585 guarantee_property(
1586 code_attribute_length == sizeof(u2) + length_in_bytes,
1587 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1588
1589 cfs->guarantee_more(length_in_bytes, CHECK);
1590
1591 if ((*write_stream) == nullptr) {
1592 if (length_in_bytes > fixed_buffer_size) {
1593 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1594 } else {
1595 (*write_stream) = new CompressedLineNumberWriteStream(
1596 _linenumbertable_buffer, fixed_buffer_size);
1597 }
1598 }
1599
1600 while (num_entries-- > 0) {
1601 const u2 bci = cfs->get_u2_fast(); // start_pc
1602 const u2 line = cfs->get_u2_fast(); // line_number
1603 guarantee_property(bci < code_length,
1604 "Invalid pc in LineNumberTable in class file %s", CHECK);
1605 (*write_stream)->write_pair(bci, line);
1606 }
1607 }
1608
1609
1610 class LVT_Hash : public AllStatic {
1611 public:
1612
1613 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1614 /*
1615 * 3-tuple start_bci/length/slot has to be unique key,
1616 * so the following comparison seems to be redundant:
1617 * && elem->name_cp_index == entry->_elem->name_cp_index
1618 */
1619 return (e0.start_bci == e1.start_bci &&
1620 e0.length == e1.length &&
1621 e0.name_cp_index == e1.name_cp_index &&
1622 e0.slot == e1.slot);
1623 }
1624
1625 static unsigned int hash(LocalVariableTableElement const& e0) {
1626 unsigned int raw_hash = e0.start_bci;
1627
1628 raw_hash = e0.length + raw_hash * 37;
1629 raw_hash = e0.name_cp_index + raw_hash * 37;
1630 raw_hash = e0.slot + raw_hash * 37;
1631
1632 return raw_hash;
1633 }
1634 };
1635
1636
1637 // Class file LocalVariableTable elements.
1638 class Classfile_LVT_Element {
1639 public:
1640 u2 start_bci;
1641 u2 length;
1642 u2 name_cp_index;
1643 u2 descriptor_cp_index;
1644 u2 slot;
1645 };
1646
1647 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1648 LocalVariableTableElement* const lvt) {
1649 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1650 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1651 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1652 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1653 lvt->signature_cp_index = 0;
1654 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1655 }
1656
1657 // Function is used to parse both attributes:
1658 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1659 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1660 u4 code_length,
1661 u2 max_locals,
1662 u4 code_attribute_length,
1663 u2* const localvariable_table_length,
1664 bool isLVTT,
1665 TRAPS) {
1666 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1667 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1668 const unsigned int size = checked_cast<unsigned>(
1669 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2));
1670
1671 const ConstantPool* const cp = _cp;
1672
1673 // Verify local variable table attribute has right length
1674 if (_need_verify) {
1675 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1676 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1677 }
1678
1679 const unsafe_u2* const localvariable_table_start = cfs->current();
1680 assert(localvariable_table_start != nullptr, "null local variable table");
1681 if (!_need_verify) {
1682 cfs->skip_u2_fast(size);
1683 } else {
1684 cfs->guarantee_more(size * 2, CHECK_NULL);
1685 for(int i = 0; i < (*localvariable_table_length); i++) {
1686 const u2 start_pc = cfs->get_u2_fast();
1687 const u2 length = cfs->get_u2_fast();
1688 const u2 name_index = cfs->get_u2_fast();
1689 const u2 descriptor_index = cfs->get_u2_fast();
1690 const u2 index = cfs->get_u2_fast();
1691 // Assign to a u4 to avoid overflow
1692 const u4 end_pc = (u4)start_pc + (u4)length;
1693
1694 if (start_pc >= code_length) {
1695 classfile_parse_error(
1696 "Invalid start_pc %u in %s in class file %s",
1697 start_pc, tbl_name, THREAD);
1698 return nullptr;
1699 }
1700 if (end_pc > code_length) {
1701 classfile_parse_error(
1702 "Invalid length %u in %s in class file %s",
1703 length, tbl_name, THREAD);
1704 return nullptr;
1705 }
1706 const int cp_size = cp->length();
1707 guarantee_property(valid_symbol_at(name_index),
1708 "Name index %u in %s has bad constant type in class file %s",
1709 name_index, tbl_name, CHECK_NULL);
1710 guarantee_property(valid_symbol_at(descriptor_index),
1711 "Signature index %u in %s has bad constant type in class file %s",
1712 descriptor_index, tbl_name, CHECK_NULL);
1713
1714 const Symbol* const name = cp->symbol_at(name_index);
1715 const Symbol* const sig = cp->symbol_at(descriptor_index);
1716 verify_legal_field_name(name, CHECK_NULL);
1717 u2 extra_slot = 0;
1718 if (!isLVTT) {
1719 verify_legal_field_signature(name, sig, CHECK_NULL);
1720
1721 // 4894874: check special cases for double and long local variables
1722 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1723 sig == vmSymbols::type_signature(T_LONG)) {
1724 extra_slot = 1;
1725 }
1726 }
1727 guarantee_property((index + extra_slot) < max_locals,
1728 "Invalid index %u in %s in class file %s",
1729 index, tbl_name, CHECK_NULL);
1730 }
1731 }
1732 return localvariable_table_start;
1733 }
1734
1735 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1736 u4 code_attribute_length,
1737 TRAPS) {
1738 assert(cfs != nullptr, "invariant");
1739
1740 if (0 == code_attribute_length) {
1741 return nullptr;
1742 }
1743
1744 const u1* const stackmap_table_start = cfs->current();
1745 assert(stackmap_table_start != nullptr, "null stackmap table");
1746
1747 // check code_attribute_length
1748 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1749
1750 return stackmap_table_start;
1751 }
1752
1753 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1754 u2* const checked_exceptions_length,
1755 u4 method_attribute_length,
1756 TRAPS) {
1757 assert(cfs != nullptr, "invariant");
1758 assert(checked_exceptions_length != nullptr, "invariant");
1759
1760 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1761 *checked_exceptions_length = cfs->get_u2_fast();
1762 const unsigned int size =
1763 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1764 const unsafe_u2* const checked_exceptions_start = cfs->current();
1765 assert(checked_exceptions_start != nullptr, "null checked exceptions");
1766 if (!_need_verify) {
1767 cfs->skip_u2_fast(size);
1768 } else {
1769 // Verify each value in the checked exception table
1770 u2 checked_exception;
1771 const u2 len = *checked_exceptions_length;
1772 cfs->guarantee_more(2 * len, CHECK_NULL);
1773 for (int i = 0; i < len; i++) {
1774 checked_exception = cfs->get_u2_fast();
1775 guarantee_property(
1776 valid_klass_reference_at(checked_exception),
1777 "Exception name has bad type at constant pool %u in class file %s",
1778 checked_exception, CHECK_NULL);
1779 }
1780 }
1781 // check exceptions attribute length
1782 if (_need_verify) {
1783 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1784 sizeof(u2) * size),
1785 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1786 }
1787 return checked_exceptions_start;
1788 }
1789
1790 void ClassFileParser::throwIllegalSignature(const char* type,
1791 const Symbol* name,
1792 const Symbol* sig,
1793 TRAPS) const {
1794 assert(name != nullptr, "invariant");
1795 assert(sig != nullptr, "invariant");
1796
1797 ResourceMark rm(THREAD);
1798 // Names are all known to be < 64k so we know this formatted message is not excessively large.
1799 Exceptions::fthrow(THREAD_AND_LOCATION,
1800 vmSymbols::java_lang_ClassFormatError(),
1801 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1802 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1803 }
1804
1805 AnnotationCollector::ID
1806 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1807 const Symbol* name,
1808 const bool can_access_vm_annotations) {
1809 const vmSymbolID sid = vmSymbols::find_sid(name);
1810 // Privileged code can use all annotations. Other code silently drops some.
1811 const bool privileged = loader_data->is_boot_class_loader_data() ||
1812 loader_data->is_platform_class_loader_data() ||
1813 can_access_vm_annotations;
1814 switch (sid) {
1815 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1816 if (_location != _in_method) break; // only allow for methods
1817 if (!privileged) break; // only allow in privileged code
1818 return _method_CallerSensitive;
1819 }
1820 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1821 if (_location != _in_method) break; // only allow for methods
1822 if (!privileged) break; // only allow in privileged code
1823 return _method_ForceInline;
1824 }
1825 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1826 if (_location != _in_method) break; // only allow for methods
1827 if (!privileged) break; // only allow in privileged code
1828 return _method_DontInline;
1829 }
1830 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ChangesCurrentThread_signature): {
1831 if (_location != _in_method) break; // only allow for methods
1832 if (!privileged) break; // only allow in privileged code
1833 return _method_ChangesCurrentThread;
1834 }
1835 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiHideEvents_signature): {
1836 if (_location != _in_method) break; // only allow for methods
1837 if (!privileged) break; // only allow in privileged code
1838 return _method_JvmtiHideEvents;
1839 }
1840 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiMountTransition_signature): {
1841 if (_location != _in_method) break; // only allow for methods
1842 if (!privileged) break; // only allow in privileged code
1843 return _method_JvmtiMountTransition;
1844 }
1845 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1846 if (_location != _in_method) break; // only allow for methods
1847 if (!privileged) break; // only allow in privileged code
1848 return _method_InjectedProfile;
1849 }
1850 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1851 if (_location != _in_method) break; // only allow for methods
1852 if (!privileged) break; // only allow in privileged code
1853 return _method_LambdaForm_Compiled;
1854 }
1855 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
1856 if (_location != _in_method) break; // only allow for methods
1857 if (!privileged) break; // only allow in privileged code
1858 return _method_Hidden;
1859 }
1860 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
1861 if (_location != _in_method) break; // only allow for methods
1862 if (!privileged) break; // only allow in privileged code
1863 return _method_Scoped;
1864 }
1865 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
1866 if (_location != _in_method) break; // only allow for methods
1867 if (!privileged) break; // only allow in privileged code
1868 return _method_IntrinsicCandidate;
1869 }
1870 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
1871 if (_location != _in_field) break; // only allow for fields
1872 if (!privileged) break; // only allow in privileged code
1873 return _field_Stable;
1874 }
1875 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
1876 if (_location != _in_field && _location != _in_class) {
1877 break; // only allow for fields and classes
1878 }
1879 if (!EnableContended || (RestrictContended && !privileged)) {
1880 break; // honor privileges
1881 }
1882 return _jdk_internal_vm_annotation_Contended;
1883 }
1884 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
1885 if (_location != _in_method) break; // only allow for methods
1886 if (RestrictReservedStack && !privileged) break; // honor privileges
1887 return _jdk_internal_vm_annotation_ReservedStackAccess;
1888 }
1889 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
1890 if (_location != _in_class) break; // only allow for classes
1891 if (!privileged) break; // only allow in privileged code
1892 return _jdk_internal_ValueBased;
1893 }
1894 case VM_SYMBOL_ENUM_NAME(java_lang_Deprecated): {
1895 return _java_lang_Deprecated;
1896 }
1897 default: {
1898 break;
1899 }
1900 }
1901 return AnnotationCollector::_unknown;
1902 }
1903
1904 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1905 if (is_contended())
1906 // Setting the contended group also sets the contended bit in field flags
1907 f->set_contended_group(contended_group());
1908 if (is_stable())
1909 (f->field_flags_addr())->update_stable(true);
1910 }
1911
1912 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
1913 // If there's an error deallocate metadata for field annotations
1914 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
1915 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
1916 }
1917
1918 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
1919 if (has_annotation(_method_CallerSensitive))
1920 m->set_caller_sensitive();
1921 if (has_annotation(_method_ForceInline))
1922 m->set_force_inline();
1923 if (has_annotation(_method_DontInline))
1924 m->set_dont_inline();
1925 if (has_annotation(_method_ChangesCurrentThread))
1926 m->set_changes_current_thread();
1927 if (has_annotation(_method_JvmtiHideEvents))
1928 m->set_jvmti_hide_events();
1929 if (has_annotation(_method_JvmtiMountTransition))
1930 m->set_jvmti_mount_transition();
1931 if (has_annotation(_method_InjectedProfile))
1932 m->set_has_injected_profile();
1933 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1934 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1935 if (has_annotation(_method_Hidden))
1936 m->set_is_hidden();
1937 if (has_annotation(_method_Scoped))
1938 m->set_scoped();
1939 if (has_annotation(_method_IntrinsicCandidate) && !m->is_synthetic())
1940 m->set_intrinsic_candidate();
1941 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
1942 m->set_has_reserved_stack_access();
1943 if (has_annotation(_java_lang_Deprecated))
1944 m->set_deprecated();
1945 if (has_annotation(_java_lang_Deprecated_for_removal))
1946 m->set_deprecated_for_removal();
1947 }
1948
1949 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
1950 assert(ik != nullptr, "invariant");
1951 if (has_annotation(_jdk_internal_vm_annotation_Contended)) {
1952 ik->set_is_contended(is_contended());
1953 }
1954 if (has_annotation(_jdk_internal_ValueBased)) {
1955 ik->set_has_value_based_class_annotation();
1956 if (DiagnoseSyncOnValueBasedClasses) {
1957 ik->set_is_value_based();
1958 }
1959 }
1960 if (has_annotation(_java_lang_Deprecated)) {
1961 Array<Method*>* methods = ik->methods();
1962 int length = ik->methods()->length();
1963 for (int i = 0; i < length; i++) {
1964 Method* m = methods->at(i);
1965 m->set_deprecated();
1966 }
1967 }
1968 if (has_annotation(_java_lang_Deprecated_for_removal)) {
1969 Array<Method*>* methods = ik->methods();
1970 int length = ik->methods()->length();
1971 for (int i = 0; i < length; i++) {
1972 Method* m = methods->at(i);
1973 m->set_deprecated_for_removal();
1974 }
1975 }
1976 }
1977
1978 #define MAX_ARGS_SIZE 255
1979 #define MAX_CODE_SIZE 65535
1980 #define INITIAL_MAX_LVT_NUMBER 256
1981
1982 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1983 *
1984 * Rules for LVT's and LVTT's are:
1985 * - There can be any number of LVT's and LVTT's.
1986 * - If there are n LVT's, it is the same as if there was just
1987 * one LVT containing all the entries from the n LVT's.
1988 * - There may be no more than one LVT entry per local variable.
1989 * Two LVT entries are 'equal' if these fields are the same:
1990 * start_pc, length, name, slot
1991 * - There may be no more than one LVTT entry per each LVT entry.
1992 * Each LVTT entry has to match some LVT entry.
1993 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
1994 */
1995 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
1996 int lvt_cnt,
1997 u2* const localvariable_table_length,
1998 const unsafe_u2** const localvariable_table_start,
1999 int lvtt_cnt,
2000 u2* const localvariable_type_table_length,
2001 const unsafe_u2** const localvariable_type_table_start,
2002 TRAPS) {
2003
2004 ResourceMark rm(THREAD);
2005
2006 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2007 256, AnyObj::RESOURCE_AREA, mtInternal,
2008 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2009
2010 LVT_HashTable* const table = new LVT_HashTable();
2011
2012 // To fill LocalVariableTable in
2013 const Classfile_LVT_Element* cf_lvt;
2014 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2015
2016 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2017 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2018 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2019 copy_lvt_element(&cf_lvt[idx], lvt);
2020 // If no duplicates, add LVT elem in hashtable.
2021 if (table->put(*lvt, lvt) == false
2022 && _need_verify
2023 && _major_version >= JAVA_1_5_VERSION) {
2024 classfile_parse_error("Duplicated LocalVariableTable attribute "
2025 "entry for '%s' in class file %s",
2026 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2027 THREAD);
2028 return;
2029 }
2030 }
2031 }
2032
2033 // To merge LocalVariableTable and LocalVariableTypeTable
2034 const Classfile_LVT_Element* cf_lvtt;
2035 LocalVariableTableElement lvtt_elem;
2036
2037 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2038 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2039 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2040 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2041 LocalVariableTableElement** entry = table->get(lvtt_elem);
2042 if (entry == nullptr) {
2043 if (_need_verify) {
2044 classfile_parse_error("LVTT entry for '%s' in class file %s "
2045 "does not match any LVT entry",
2046 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2047 THREAD);
2048 return;
2049 }
2050 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2051 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2052 "entry for '%s' in class file %s",
2053 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2054 THREAD);
2055 return;
2056 } else {
2057 // to add generic signatures into LocalVariableTable
2058 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2059 }
2060 }
2061 }
2062 }
2063
2064
2065 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2066 const u1* runtime_visible_annotations,
2067 int runtime_visible_annotations_length,
2068 const u1* runtime_visible_parameter_annotations,
2069 int runtime_visible_parameter_annotations_length,
2070 const u1* runtime_visible_type_annotations,
2071 int runtime_visible_type_annotations_length,
2072 const u1* annotation_default,
2073 int annotation_default_length,
2074 TRAPS) {
2075
2076 AnnotationArray* a;
2077
2078 if (runtime_visible_annotations_length > 0) {
2079 a = allocate_annotations(runtime_visible_annotations,
2080 runtime_visible_annotations_length,
2081 CHECK);
2082 cm->set_method_annotations(a);
2083 }
2084
2085 if (runtime_visible_parameter_annotations_length > 0) {
2086 a = allocate_annotations(runtime_visible_parameter_annotations,
2087 runtime_visible_parameter_annotations_length,
2088 CHECK);
2089 cm->set_parameter_annotations(a);
2090 }
2091
2092 if (annotation_default_length > 0) {
2093 a = allocate_annotations(annotation_default,
2094 annotation_default_length,
2095 CHECK);
2096 cm->set_default_annotations(a);
2097 }
2098
2099 if (runtime_visible_type_annotations_length > 0) {
2100 a = allocate_annotations(runtime_visible_type_annotations,
2101 runtime_visible_type_annotations_length,
2102 CHECK);
2103 cm->set_type_annotations(a);
2104 }
2105 }
2106
2107
2108 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2109 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2110 // Method* to save footprint, so we only know the size of the resulting Method* when the
2111 // entire method attribute is parsed.
2112 //
2113 // The has_localvariable_table parameter is used to pass up the value to InstanceKlass.
2114
2115 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2116 bool is_interface,
2117 const ConstantPool* cp,
2118 bool* const has_localvariable_table,
2119 TRAPS) {
2120 assert(cfs != nullptr, "invariant");
2121 assert(cp != nullptr, "invariant");
2122 assert(has_localvariable_table != nullptr, "invariant");
2123
2124 ResourceMark rm(THREAD);
2125 // Parse fixed parts:
2126 // access_flags, name_index, descriptor_index, attributes_count
2127 cfs->guarantee_more(8, CHECK_NULL);
2128
2129 u2 flags = cfs->get_u2_fast();
2130 const u2 name_index = cfs->get_u2_fast();
2131 const int cp_size = cp->length();
2132 guarantee_property(
2133 valid_symbol_at(name_index),
2134 "Illegal constant pool index %u for method name in class file %s",
2135 name_index, CHECK_NULL);
2136 const Symbol* const name = cp->symbol_at(name_index);
2137 verify_legal_method_name(name, CHECK_NULL);
2138
2139 const u2 signature_index = cfs->get_u2_fast();
2140 guarantee_property(
2141 valid_symbol_at(signature_index),
2142 "Illegal constant pool index %u for method signature in class file %s",
2143 signature_index, CHECK_NULL);
2144 const Symbol* const signature = cp->symbol_at(signature_index);
2145
2146 if (name == vmSymbols::class_initializer_name()) {
2147 // We ignore the other access flags for a valid class initializer.
2148 // (JVM Spec 2nd ed., chapter 4.6)
2149 if (_major_version < 51) { // backward compatibility
2150 flags = JVM_ACC_STATIC;
2151 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2152 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2153 } else {
2154 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2155 return nullptr;
2156 }
2157 } else {
2158 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2159 }
2160
2161 if (name == vmSymbols::object_initializer_name() && is_interface) {
2162 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2163 return nullptr;
2164 }
2165
2166 int args_size = -1; // only used when _need_verify is true
2167 if (_need_verify) {
2168 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2169 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2170 verify_legal_method_signature(name, signature, CHECK_NULL);
2171 if (args_size > MAX_ARGS_SIZE) {
2172 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2173 return nullptr;
2174 }
2175 }
2176
2177 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2178
2179 // Default values for code and exceptions attribute elements
2180 u2 max_stack = 0;
2181 u2 max_locals = 0;
2182 u4 code_length = 0;
2183 const u1* code_start = nullptr;
2184 u2 exception_table_length = 0;
2185 const unsafe_u2* exception_table_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2186 Array<int>* exception_handlers = Universe::the_empty_int_array();
2187 u2 checked_exceptions_length = 0;
2188 const unsafe_u2* checked_exceptions_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2189 CompressedLineNumberWriteStream* linenumber_table = nullptr;
2190 int linenumber_table_length = 0;
2191 int total_lvt_length = 0;
2192 u2 lvt_cnt = 0;
2193 u2 lvtt_cnt = 0;
2194 bool lvt_allocated = false;
2195 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2196 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2197 u2* localvariable_table_length = nullptr;
2198 const unsafe_u2** localvariable_table_start = nullptr; // (potentially unaligned) pointer to array of LVT attributes
2199 u2* localvariable_type_table_length = nullptr;
2200 const unsafe_u2** localvariable_type_table_start = nullptr; // (potentially unaligned) pointer to LVTT attributes
2201 int method_parameters_length = -1;
2202 const u1* method_parameters_data = nullptr;
2203 bool method_parameters_seen = false;
2204 bool parsed_code_attribute = false;
2205 bool parsed_checked_exceptions_attribute = false;
2206 bool parsed_stackmap_attribute = false;
2207 // stackmap attribute - JDK1.5
2208 const u1* stackmap_data = nullptr;
2209 int stackmap_data_length = 0;
2210 u2 generic_signature_index = 0;
2211 MethodAnnotationCollector parsed_annotations;
2212 const u1* runtime_visible_annotations = nullptr;
2213 int runtime_visible_annotations_length = 0;
2214 const u1* runtime_visible_parameter_annotations = nullptr;
2215 int runtime_visible_parameter_annotations_length = 0;
2216 const u1* runtime_visible_type_annotations = nullptr;
2217 int runtime_visible_type_annotations_length = 0;
2218 bool runtime_invisible_annotations_exists = false;
2219 bool runtime_invisible_type_annotations_exists = false;
2220 bool runtime_invisible_parameter_annotations_exists = false;
2221 const u1* annotation_default = nullptr;
2222 int annotation_default_length = 0;
2223
2224 // Parse code and exceptions attribute
2225 u2 method_attributes_count = cfs->get_u2_fast();
2226 while (method_attributes_count--) {
2227 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2228 const u2 method_attribute_name_index = cfs->get_u2_fast();
2229 const u4 method_attribute_length = cfs->get_u4_fast();
2230 guarantee_property(
2231 valid_symbol_at(method_attribute_name_index),
2232 "Invalid method attribute name index %u in class file %s",
2233 method_attribute_name_index, CHECK_NULL);
2234
2235 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2236 if (method_attribute_name == vmSymbols::tag_code()) {
2237 // Parse Code attribute
2238 if (_need_verify) {
2239 guarantee_property(
2240 !access_flags.is_native() && !access_flags.is_abstract(),
2241 "Code attribute in native or abstract methods in class file %s",
2242 CHECK_NULL);
2243 }
2244 if (parsed_code_attribute) {
2245 classfile_parse_error("Multiple Code attributes in class file %s",
2246 THREAD);
2247 return nullptr;
2248 }
2249 parsed_code_attribute = true;
2250
2251 // Stack size, locals size, and code size
2252 cfs->guarantee_more(8, CHECK_NULL);
2253 max_stack = cfs->get_u2_fast();
2254 max_locals = cfs->get_u2_fast();
2255 code_length = cfs->get_u4_fast();
2256 if (_need_verify) {
2257 guarantee_property(args_size <= max_locals,
2258 "Arguments can't fit into locals in class file %s",
2259 CHECK_NULL);
2260 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2261 "Invalid method Code length %u in class file %s",
2262 code_length, CHECK_NULL);
2263 }
2264 // Code pointer
2265 code_start = cfs->current();
2266 assert(code_start != nullptr, "null code start");
2267 cfs->guarantee_more(code_length, CHECK_NULL);
2268 cfs->skip_u1_fast(code_length);
2269
2270 // Exception handler table
2271 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2272 exception_table_length = cfs->get_u2_fast();
2273 if (exception_table_length > 0) {
2274 exception_table_start = parse_exception_table(cfs,
2275 code_length,
2276 exception_table_length,
2277 CHECK_NULL);
2278 }
2279
2280 // Parse additional attributes in code attribute
2281 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2282 u2 code_attributes_count = cfs->get_u2_fast();
2283
2284 unsigned int calculated_attribute_length = 0;
2285
2286 calculated_attribute_length =
2287 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2288 calculated_attribute_length += checked_cast<unsigned int>(
2289 code_length +
2290 sizeof(exception_table_length) +
2291 sizeof(code_attributes_count) +
2292 exception_table_length *
2293 ( sizeof(u2) + // start_pc
2294 sizeof(u2) + // end_pc
2295 sizeof(u2) + // handler_pc
2296 sizeof(u2) )); // catch_type_index
2297
2298 while (code_attributes_count--) {
2299 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2300 const u2 code_attribute_name_index = cfs->get_u2_fast();
2301 const u4 code_attribute_length = cfs->get_u4_fast();
2302 calculated_attribute_length += code_attribute_length +
2303 (unsigned)sizeof(code_attribute_name_index) +
2304 (unsigned)sizeof(code_attribute_length);
2305 guarantee_property(valid_symbol_at(code_attribute_name_index),
2306 "Invalid code attribute name index %u in class file %s",
2307 code_attribute_name_index,
2308 CHECK_NULL);
2309 if (LoadLineNumberTables &&
2310 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2311 // Parse and compress line number table
2312 parse_linenumber_table(code_attribute_length,
2313 code_length,
2314 &linenumber_table,
2315 CHECK_NULL);
2316
2317 } else if (LoadLocalVariableTables &&
2318 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2319 // Parse local variable table
2320 if (!lvt_allocated) {
2321 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2322 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2323 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2324 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2325 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2326 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2327 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2328 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2329 lvt_allocated = true;
2330 }
2331 if (lvt_cnt == max_lvt_cnt) {
2332 max_lvt_cnt <<= 1;
2333 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2334 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2335 }
2336 localvariable_table_start[lvt_cnt] =
2337 parse_localvariable_table(cfs,
2338 code_length,
2339 max_locals,
2340 code_attribute_length,
2341 &localvariable_table_length[lvt_cnt],
2342 false, // is not LVTT
2343 CHECK_NULL);
2344 total_lvt_length += localvariable_table_length[lvt_cnt];
2345 lvt_cnt++;
2346 } else if (LoadLocalVariableTypeTables &&
2347 _major_version >= JAVA_1_5_VERSION &&
2348 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2349 if (!lvt_allocated) {
2350 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2351 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2352 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2353 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2354 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2355 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2356 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2357 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2358 lvt_allocated = true;
2359 }
2360 // Parse local variable type table
2361 if (lvtt_cnt == max_lvtt_cnt) {
2362 max_lvtt_cnt <<= 1;
2363 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2364 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2365 }
2366 localvariable_type_table_start[lvtt_cnt] =
2367 parse_localvariable_table(cfs,
2368 code_length,
2369 max_locals,
2370 code_attribute_length,
2371 &localvariable_type_table_length[lvtt_cnt],
2372 true, // is LVTT
2373 CHECK_NULL);
2374 lvtt_cnt++;
2375 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2376 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2377 // Stack map is only needed by the new verifier in JDK1.5.
2378 if (parsed_stackmap_attribute) {
2379 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2380 return nullptr;
2381 }
2382 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, CHECK_NULL);
2383 stackmap_data_length = code_attribute_length;
2384 parsed_stackmap_attribute = true;
2385 } else {
2386 // Skip unknown attributes
2387 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2388 }
2389 }
2390 // check method attribute length
2391 if (_need_verify) {
2392 guarantee_property(method_attribute_length == calculated_attribute_length,
2393 "Code segment has wrong length in class file %s",
2394 CHECK_NULL);
2395 }
2396 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2397 // Parse Exceptions attribute
2398 if (parsed_checked_exceptions_attribute) {
2399 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2400 THREAD);
2401 return nullptr;
2402 }
2403 parsed_checked_exceptions_attribute = true;
2404 checked_exceptions_start =
2405 parse_checked_exceptions(cfs,
2406 &checked_exceptions_length,
2407 method_attribute_length,
2408 CHECK_NULL);
2409 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2410 // reject multiple method parameters
2411 if (method_parameters_seen) {
2412 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2413 THREAD);
2414 return nullptr;
2415 }
2416 method_parameters_seen = true;
2417 method_parameters_length = cfs->get_u1_fast();
2418 const u4 real_length = (method_parameters_length * 4u) + 1u;
2419 if (method_attribute_length != real_length) {
2420 classfile_parse_error(
2421 "Invalid MethodParameters method attribute length %u in class file",
2422 method_attribute_length, THREAD);
2423 return nullptr;
2424 }
2425 method_parameters_data = cfs->current();
2426 cfs->skip_u2_fast(method_parameters_length);
2427 cfs->skip_u2_fast(method_parameters_length);
2428 // ignore this attribute if it cannot be reflected
2429 if (!vmClasses::Parameter_klass_loaded())
2430 method_parameters_length = -1;
2431 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2432 if (method_attribute_length != 0) {
2433 classfile_parse_error(
2434 "Invalid Synthetic method attribute length %u in class file %s",
2435 method_attribute_length, THREAD);
2436 return nullptr;
2437 }
2438 // Should we check that there hasn't already been a synthetic attribute?
2439 access_flags.set_is_synthetic();
2440 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2441 if (method_attribute_length != 0) {
2442 classfile_parse_error(
2443 "Invalid Deprecated method attribute length %u in class file %s",
2444 method_attribute_length, THREAD);
2445 return nullptr;
2446 }
2447 } else if (_major_version >= JAVA_1_5_VERSION) {
2448 if (method_attribute_name == vmSymbols::tag_signature()) {
2449 if (generic_signature_index != 0) {
2450 classfile_parse_error(
2451 "Multiple Signature attributes for method in class file %s",
2452 THREAD);
2453 return nullptr;
2454 }
2455 if (method_attribute_length != 2) {
2456 classfile_parse_error(
2457 "Invalid Signature attribute length %u in class file %s",
2458 method_attribute_length, THREAD);
2459 return nullptr;
2460 }
2461 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2462 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2463 if (runtime_visible_annotations != nullptr) {
2464 classfile_parse_error(
2465 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2466 THREAD);
2467 return nullptr;
2468 }
2469 runtime_visible_annotations_length = method_attribute_length;
2470 runtime_visible_annotations = cfs->current();
2471 assert(runtime_visible_annotations != nullptr, "null visible annotations");
2472 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2473 parse_annotations(cp,
2474 runtime_visible_annotations,
2475 runtime_visible_annotations_length,
2476 &parsed_annotations,
2477 _loader_data,
2478 _can_access_vm_annotations);
2479 cfs->skip_u1_fast(runtime_visible_annotations_length);
2480 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2481 if (runtime_invisible_annotations_exists) {
2482 classfile_parse_error(
2483 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2484 THREAD);
2485 return nullptr;
2486 }
2487 runtime_invisible_annotations_exists = true;
2488 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2489 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2490 if (runtime_visible_parameter_annotations != nullptr) {
2491 classfile_parse_error(
2492 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2493 THREAD);
2494 return nullptr;
2495 }
2496 runtime_visible_parameter_annotations_length = method_attribute_length;
2497 runtime_visible_parameter_annotations = cfs->current();
2498 assert(runtime_visible_parameter_annotations != nullptr, "null visible parameter annotations");
2499 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2500 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2501 if (runtime_invisible_parameter_annotations_exists) {
2502 classfile_parse_error(
2503 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2504 THREAD);
2505 return nullptr;
2506 }
2507 runtime_invisible_parameter_annotations_exists = true;
2508 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2509 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2510 if (annotation_default != nullptr) {
2511 classfile_parse_error(
2512 "Multiple AnnotationDefault attributes for method in class file %s",
2513 THREAD);
2514 return nullptr;
2515 }
2516 annotation_default_length = method_attribute_length;
2517 annotation_default = cfs->current();
2518 assert(annotation_default != nullptr, "null annotation default");
2519 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2520 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2521 if (runtime_visible_type_annotations != nullptr) {
2522 classfile_parse_error(
2523 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2524 THREAD);
2525 return nullptr;
2526 }
2527 runtime_visible_type_annotations_length = method_attribute_length;
2528 runtime_visible_type_annotations = cfs->current();
2529 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
2530 // No need for the VM to parse Type annotations
2531 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2532 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2533 if (runtime_invisible_type_annotations_exists) {
2534 classfile_parse_error(
2535 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2536 THREAD);
2537 return nullptr;
2538 }
2539 runtime_invisible_type_annotations_exists = true;
2540 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2541 } else {
2542 // Skip unknown attributes
2543 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2544 }
2545 } else {
2546 // Skip unknown attributes
2547 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2548 }
2549 }
2550
2551 if (linenumber_table != nullptr) {
2552 linenumber_table->write_terminator();
2553 linenumber_table_length = linenumber_table->position();
2554 }
2555
2556 // Make sure there's at least one Code attribute in non-native/non-abstract method
2557 if (_need_verify) {
2558 guarantee_property(access_flags.is_native() ||
2559 access_flags.is_abstract() ||
2560 parsed_code_attribute,
2561 "Absent Code attribute in method that is not native or abstract in class file %s",
2562 CHECK_NULL);
2563 }
2564
2565 // All sizing information for a Method* is finally available, now create it
2566 InlineTableSizes sizes(
2567 total_lvt_length,
2568 linenumber_table_length,
2569 exception_table_length,
2570 checked_exceptions_length,
2571 method_parameters_length,
2572 generic_signature_index,
2573 runtime_visible_annotations_length,
2574 runtime_visible_parameter_annotations_length,
2575 runtime_visible_type_annotations_length,
2576 annotation_default_length,
2577 0);
2578
2579 Method* const m = Method::allocate(_loader_data,
2580 code_length,
2581 access_flags,
2582 &sizes,
2583 ConstMethod::NORMAL,
2584 _cp->symbol_at(name_index),
2585 CHECK_NULL);
2586
2587 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2588
2589 // Fill in information from fixed part (access_flags already set)
2590 m->set_constants(_cp);
2591 m->set_name_index(name_index);
2592 m->set_signature_index(signature_index);
2593 m->constMethod()->compute_from_signature(cp->symbol_at(signature_index), access_flags.is_static());
2594 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2595
2596 // Fill in code attribute information
2597 m->set_max_stack(max_stack);
2598 m->set_max_locals(max_locals);
2599 if (stackmap_data != nullptr) {
2600 m->constMethod()->copy_stackmap_data(_loader_data,
2601 (u1*)stackmap_data,
2602 stackmap_data_length,
2603 CHECK_NULL);
2604 }
2605
2606 // Copy byte codes
2607 m->set_code((u1*)code_start);
2608
2609 // Copy line number table
2610 if (linenumber_table != nullptr) {
2611 memcpy(m->compressed_linenumber_table(),
2612 linenumber_table->buffer(),
2613 linenumber_table_length);
2614 }
2615
2616 // Copy exception table
2617 if (exception_table_length > 0) {
2618 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2619 m->exception_table_start(),
2620 exception_table_length * sizeof(ExceptionTableElement),
2621 sizeof(u2));
2622 }
2623
2624 // Copy method parameters
2625 if (method_parameters_length > 0) {
2626 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2627 for (int i = 0; i < method_parameters_length; i++) {
2628 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2629 method_parameters_data += 2;
2630 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2631 method_parameters_data += 2;
2632 }
2633 }
2634
2635 // Copy checked exceptions
2636 if (checked_exceptions_length > 0) {
2637 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2638 m->checked_exceptions_start(),
2639 checked_exceptions_length * sizeof(CheckedExceptionElement),
2640 sizeof(u2));
2641 }
2642
2643 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2644 if (total_lvt_length > 0) {
2645 *has_localvariable_table = true;
2646 copy_localvariable_table(m->constMethod(),
2647 lvt_cnt,
2648 localvariable_table_length,
2649 localvariable_table_start,
2650 lvtt_cnt,
2651 localvariable_type_table_length,
2652 localvariable_type_table_start,
2653 CHECK_NULL);
2654 }
2655
2656 if (parsed_annotations.has_any_annotations())
2657 parsed_annotations.apply_to(methodHandle(THREAD, m));
2658
2659 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2660 m->set_is_hidden();
2661 }
2662
2663 // Copy annotations
2664 copy_method_annotations(m->constMethod(),
2665 runtime_visible_annotations,
2666 runtime_visible_annotations_length,
2667 runtime_visible_parameter_annotations,
2668 runtime_visible_parameter_annotations_length,
2669 runtime_visible_type_annotations,
2670 runtime_visible_type_annotations_length,
2671 annotation_default,
2672 annotation_default_length,
2673 CHECK_NULL);
2674
2675 if (InstanceKlass::is_finalization_enabled() &&
2676 name == vmSymbols::finalize_method_name() &&
2677 signature == vmSymbols::void_method_signature()) {
2678 if (m->is_empty_method()) {
2679 _has_empty_finalizer = true;
2680 } else {
2681 _has_finalizer = true;
2682 }
2683 }
2684
2685 NOT_PRODUCT(m->verify());
2686 return m;
2687 }
2688
2689
2690 // Side-effects: populates the _methods field in the parser
2691 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2692 bool is_interface,
2693 bool* const has_localvariable_table,
2694 bool* has_final_method,
2695 bool* declares_nonstatic_concrete_methods,
2696 TRAPS) {
2697 assert(cfs != nullptr, "invariant");
2698 assert(has_localvariable_table != nullptr, "invariant");
2699 assert(has_final_method != nullptr, "invariant");
2700 assert(declares_nonstatic_concrete_methods != nullptr, "invariant");
2701
2702 assert(nullptr == _methods, "invariant");
2703
2704 cfs->guarantee_more(2, CHECK); // length
2705 const u2 length = cfs->get_u2_fast();
2706 if (length == 0) {
2707 _methods = Universe::the_empty_method_array();
2708 } else {
2709 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2710 length,
2711 nullptr,
2712 CHECK);
2713
2714 for (int index = 0; index < length; index++) {
2715 Method* method = parse_method(cfs,
2716 is_interface,
2717 _cp,
2718 has_localvariable_table,
2719 CHECK);
2720
2721 if (method->is_final()) {
2722 *has_final_method = true;
2723 }
2724 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2725 // used for interface initialization, and default method inheritance analysis
2726 if (is_interface && !(*declares_nonstatic_concrete_methods)
2727 && !method->is_abstract() && !method->is_static()) {
2728 *declares_nonstatic_concrete_methods = true;
2729 }
2730 _methods->at_put(index, method);
2731 }
2732
2733 if (_need_verify && length > 1) {
2734 // Check duplicated methods
2735 ResourceMark rm(THREAD);
2736 // Set containing name-signature pairs
2737 NameSigHashtable* names_and_sigs = new NameSigHashtable();
2738 for (int i = 0; i < length; i++) {
2739 const Method* const m = _methods->at(i);
2740 NameSigHash name_and_sig(m->name(), m->signature());
2741 // If no duplicates, add name/signature in hashtable names_and_sigs.
2742 if(!names_and_sigs->put(name_and_sig, 0)) {
2743 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2744 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
2745 return;
2746 }
2747 }
2748 }
2749 }
2750 }
2751
2752 static const intArray* sort_methods(Array<Method*>* methods) {
2753 const int length = methods->length();
2754 // If JVMTI original method ordering or sharing is enabled we have to
2755 // remember the original class file ordering.
2756 // We temporarily use the vtable_index field in the Method* to store the
2757 // class file index, so we can read in after calling qsort.
2758 // Put the method ordering in the shared archive.
2759 if (JvmtiExport::can_maintain_original_method_order() || CDSConfig::is_dumping_archive()) {
2760 for (int index = 0; index < length; index++) {
2761 Method* const m = methods->at(index);
2762 assert(!m->valid_vtable_index(), "vtable index should not be set");
2763 m->set_vtable_index(index);
2764 }
2765 }
2766 // Sort method array by ascending method name (for faster lookups & vtable construction)
2767 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2768 Method::sort_methods(methods);
2769
2770 intArray* method_ordering = nullptr;
2771 // If JVMTI original method ordering or sharing is enabled construct int
2772 // array remembering the original ordering
2773 if (JvmtiExport::can_maintain_original_method_order() || CDSConfig::is_dumping_archive()) {
2774 method_ordering = new intArray(length, length, -1);
2775 for (int index = 0; index < length; index++) {
2776 Method* const m = methods->at(index);
2777 const int old_index = m->vtable_index();
2778 assert(old_index >= 0 && old_index < length, "invalid method index");
2779 method_ordering->at_put(index, old_index);
2780 m->set_vtable_index(Method::invalid_vtable_index);
2781 }
2782 }
2783 return method_ordering;
2784 }
2785
2786 // Parse generic_signature attribute for methods and fields
2787 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2788 TRAPS) {
2789 assert(cfs != nullptr, "invariant");
2790
2791 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2792 const u2 generic_signature_index = cfs->get_u2_fast();
2793 guarantee_property(
2794 valid_symbol_at(generic_signature_index),
2795 "Invalid Signature attribute at constant pool index %u in class file %s",
2796 generic_signature_index, CHECK_0);
2797 return generic_signature_index;
2798 }
2799
2800 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2801 TRAPS) {
2802
2803 assert(cfs != nullptr, "invariant");
2804
2805 cfs->guarantee_more(2, CHECK); // sourcefile_index
2806 const u2 sourcefile_index = cfs->get_u2_fast();
2807 guarantee_property(
2808 valid_symbol_at(sourcefile_index),
2809 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2810 sourcefile_index, CHECK);
2811 set_class_sourcefile_index(sourcefile_index);
2812 }
2813
2814 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2815 int length,
2816 TRAPS) {
2817 assert(cfs != nullptr, "invariant");
2818
2819 const u1* const sde_buffer = cfs->current();
2820 assert(sde_buffer != nullptr, "null sde buffer");
2821
2822 // Don't bother storing it if there is no way to retrieve it
2823 if (JvmtiExport::can_get_source_debug_extension()) {
2824 assert((length+1) > length, "Overflow checking");
2825 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2826 for (int i = 0; i < length; i++) {
2827 sde[i] = sde_buffer[i];
2828 }
2829 sde[length] = '\0';
2830 set_class_sde_buffer((const char*)sde, length);
2831 }
2832 // Got utf8 string, set stream position forward
2833 cfs->skip_u1(length, CHECK);
2834 }
2835
2836
2837 // Inner classes can be static, private or protected (classic VM does this)
2838 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2839 JVM_ACC_PRIVATE | \
2840 JVM_ACC_PROTECTED | \
2841 JVM_ACC_STATIC \
2842 )
2843
2844 // Find index of the InnerClasses entry for the specified inner_class_info_index.
2845 // Return -1 if none is found.
2846 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
2847 Symbol* cp_klass_name = cp->klass_name_at(inner);
2848 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
2849 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
2850 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
2851 return idx;
2852 }
2853 }
2854 return -1;
2855 }
2856
2857 // Return the outer_class_info_index for the InnerClasses entry containing the
2858 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
2859 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
2860 if (inner == 0) return -1;
2861 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
2862 if (idx == -1) return -1;
2863 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
2864 return result;
2865 }
2866
2867 // Return true if circularity is found, false if no circularity is found.
2868 // Use Floyd's cycle finding algorithm.
2869 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
2870 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
2871 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
2872
2873 while (fast != -1 && fast != 0) {
2874 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
2875 return true; // found a circularity
2876 }
2877 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
2878 if (fast == -1) return false;
2879 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
2880 if (fast == -1) return false;
2881 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
2882 assert(slow != -1, "sanity check");
2883 }
2884 return false;
2885 }
2886
2887 // Loop through each InnerClasses entry checking for circularities and duplications
2888 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
2889 // return true if a circularity or entries with duplicate inner_class_info_indexes
2890 // are found.
2891 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
2892 // Loop through each InnerClasses entry.
2893 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
2894 // Return true if there are circular entries.
2895 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
2896 return true;
2897 }
2898 // Check if there are duplicate entries or entries with the same inner_class_info_index.
2899 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
2900 y += InstanceKlass::inner_class_next_offset) {
2901
2902 // 4347400: make sure there's no duplicate entry in the classes array
2903 if (_major_version >= JAVA_1_5_VERSION) {
2904 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
2905 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
2906 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
2907 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
2908 "Duplicate entry in InnerClasses attribute in class file %s",
2909 CHECK_(true));
2910 }
2911 // Return true if there are two entries with the same inner_class_info_index.
2912 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
2913 return true;
2914 }
2915 }
2916 }
2917 return false;
2918 }
2919
2920 // Return number of classes in the inner classes attribute table
2921 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
2922 const ConstantPool* cp,
2923 const u1* const inner_classes_attribute_start,
2924 bool parsed_enclosingmethod_attribute,
2925 u2 enclosing_method_class_index,
2926 u2 enclosing_method_method_index,
2927 TRAPS) {
2928 const u1* const current_mark = cfs->current();
2929 u2 length = 0;
2930 if (inner_classes_attribute_start != nullptr) {
2931 cfs->set_current(inner_classes_attribute_start);
2932 cfs->guarantee_more(2, CHECK_0); // length
2933 length = cfs->get_u2_fast();
2934 }
2935
2936 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2937 // method data:
2938 // [inner_class_info_index,
2939 // outer_class_info_index,
2940 // inner_name_index,
2941 // inner_class_access_flags,
2942 // ...
2943 // enclosing_method_class_index,
2944 // enclosing_method_method_index]
2945 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2946 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
2947 _inner_classes = inner_classes;
2948
2949 int index = 0;
2950 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2951 for (int n = 0; n < length; n++) {
2952 // Inner class index
2953 const u2 inner_class_info_index = cfs->get_u2_fast();
2954 guarantee_property(
2955 valid_klass_reference_at(inner_class_info_index),
2956 "inner_class_info_index %u has bad constant type in class file %s",
2957 inner_class_info_index, CHECK_0);
2958 // Outer class index
2959 const u2 outer_class_info_index = cfs->get_u2_fast();
2960 guarantee_property(
2961 outer_class_info_index == 0 ||
2962 valid_klass_reference_at(outer_class_info_index),
2963 "outer_class_info_index %u has bad constant type in class file %s",
2964 outer_class_info_index, CHECK_0);
2965
2966 if (outer_class_info_index != 0) {
2967 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
2968 char* bytes = (char*)outer_class_name->bytes();
2969 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
2970 "Outer class is an array class in class file %s", CHECK_0);
2971 }
2972 // Inner class name
2973 const u2 inner_name_index = cfs->get_u2_fast();
2974 guarantee_property(
2975 inner_name_index == 0 || valid_symbol_at(inner_name_index),
2976 "inner_name_index %u has bad constant type in class file %s",
2977 inner_name_index, CHECK_0);
2978 if (_need_verify) {
2979 guarantee_property(inner_class_info_index != outer_class_info_index,
2980 "Class is both outer and inner class in class file %s", CHECK_0);
2981 }
2982 // Access flags
2983 u2 flags;
2984 // JVM_ACC_MODULE is defined in JDK-9 and later.
2985 if (_major_version >= JAVA_9_VERSION) {
2986 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
2987 } else {
2988 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2989 }
2990 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2991 // Set abstract bit for old class files for backward compatibility
2992 flags |= JVM_ACC_ABSTRACT;
2993 }
2994 verify_legal_class_modifiers(flags, CHECK_0);
2995 AccessFlags inner_access_flags(flags);
2996
2997 inner_classes->at_put(index++, inner_class_info_index);
2998 inner_classes->at_put(index++, outer_class_info_index);
2999 inner_classes->at_put(index++, inner_name_index);
3000 inner_classes->at_put(index++, inner_access_flags.as_unsigned_short());
3001 }
3002
3003 // Check for circular and duplicate entries.
3004 bool has_circularity = false;
3005 if (_need_verify) {
3006 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3007 if (has_circularity) {
3008 // If circularity check failed then ignore InnerClasses attribute.
3009 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3010 index = 0;
3011 if (parsed_enclosingmethod_attribute) {
3012 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3013 _inner_classes = inner_classes;
3014 } else {
3015 _inner_classes = Universe::the_empty_short_array();
3016 }
3017 }
3018 }
3019 // Set EnclosingMethod class and method indexes.
3020 if (parsed_enclosingmethod_attribute) {
3021 inner_classes->at_put(index++, enclosing_method_class_index);
3022 inner_classes->at_put(index++, enclosing_method_method_index);
3023 }
3024 assert(index == size || has_circularity, "wrong size");
3025
3026 // Restore buffer's current position.
3027 cfs->set_current(current_mark);
3028
3029 return length;
3030 }
3031
3032 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3033 const u1* const nest_members_attribute_start,
3034 TRAPS) {
3035 const u1* const current_mark = cfs->current();
3036 u2 length = 0;
3037 if (nest_members_attribute_start != nullptr) {
3038 cfs->set_current(nest_members_attribute_start);
3039 cfs->guarantee_more(2, CHECK_0); // length
3040 length = cfs->get_u2_fast();
3041 }
3042 const int size = length;
3043 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3044 _nest_members = nest_members;
3045
3046 int index = 0;
3047 cfs->guarantee_more(2 * length, CHECK_0);
3048 for (int n = 0; n < length; n++) {
3049 const u2 class_info_index = cfs->get_u2_fast();
3050 guarantee_property(
3051 valid_klass_reference_at(class_info_index),
3052 "Nest member class_info_index %u has bad constant type in class file %s",
3053 class_info_index, CHECK_0);
3054 nest_members->at_put(index++, class_info_index);
3055 }
3056 assert(index == size, "wrong size");
3057
3058 // Restore buffer's current position.
3059 cfs->set_current(current_mark);
3060
3061 return length;
3062 }
3063
3064 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3065 const u1* const permitted_subclasses_attribute_start,
3066 TRAPS) {
3067 const u1* const current_mark = cfs->current();
3068 u2 length = 0;
3069 if (permitted_subclasses_attribute_start != nullptr) {
3070 cfs->set_current(permitted_subclasses_attribute_start);
3071 cfs->guarantee_more(2, CHECK_0); // length
3072 length = cfs->get_u2_fast();
3073 }
3074 const int size = length;
3075 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3076 _permitted_subclasses = permitted_subclasses;
3077
3078 if (length > 0) {
3079 int index = 0;
3080 cfs->guarantee_more(2 * length, CHECK_0);
3081 for (int n = 0; n < length; n++) {
3082 const u2 class_info_index = cfs->get_u2_fast();
3083 guarantee_property(
3084 valid_klass_reference_at(class_info_index),
3085 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3086 class_info_index, CHECK_0);
3087 permitted_subclasses->at_put(index++, class_info_index);
3088 }
3089 assert(index == size, "wrong size");
3090 }
3091
3092 // Restore buffer's current position.
3093 cfs->set_current(current_mark);
3094
3095 return length;
3096 }
3097
3098 // Record {
3099 // u2 attribute_name_index;
3100 // u4 attribute_length;
3101 // u2 components_count;
3102 // component_info components[components_count];
3103 // }
3104 // component_info {
3105 // u2 name_index;
3106 // u2 descriptor_index
3107 // u2 attributes_count;
3108 // attribute_info_attributes[attributes_count];
3109 // }
3110 u4 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3111 const ConstantPool* cp,
3112 const u1* const record_attribute_start,
3113 TRAPS) {
3114 const u1* const current_mark = cfs->current();
3115 int components_count = 0;
3116 unsigned int calculate_attr_size = 0;
3117 if (record_attribute_start != nullptr) {
3118 cfs->set_current(record_attribute_start);
3119 cfs->guarantee_more(2, CHECK_0); // num of components
3120 components_count = (int)cfs->get_u2_fast();
3121 calculate_attr_size = 2;
3122 }
3123
3124 Array<RecordComponent*>* const record_components =
3125 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, nullptr, CHECK_0);
3126 _record_components = record_components;
3127
3128 for (int x = 0; x < components_count; x++) {
3129 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3130
3131 const u2 name_index = cfs->get_u2_fast();
3132 guarantee_property(valid_symbol_at(name_index),
3133 "Invalid constant pool index %u for name in Record attribute in class file %s",
3134 name_index, CHECK_0);
3135 const Symbol* const name = cp->symbol_at(name_index);
3136 verify_legal_field_name(name, CHECK_0);
3137
3138 const u2 descriptor_index = cfs->get_u2_fast();
3139 guarantee_property(valid_symbol_at(descriptor_index),
3140 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3141 descriptor_index, CHECK_0);
3142 const Symbol* const descr = cp->symbol_at(descriptor_index);
3143 verify_legal_field_signature(name, descr, CHECK_0);
3144
3145 const u2 attributes_count = cfs->get_u2_fast();
3146 calculate_attr_size += 6;
3147 u2 generic_sig_index = 0;
3148 const u1* runtime_visible_annotations = nullptr;
3149 int runtime_visible_annotations_length = 0;
3150 bool runtime_invisible_annotations_exists = false;
3151 const u1* runtime_visible_type_annotations = nullptr;
3152 int runtime_visible_type_annotations_length = 0;
3153 bool runtime_invisible_type_annotations_exists = false;
3154
3155 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3156 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3157 for (int y = 0; y < attributes_count; y++) {
3158 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3159 const u2 attribute_name_index = cfs->get_u2_fast();
3160 const u4 attribute_length = cfs->get_u4_fast();
3161 calculate_attr_size += 6;
3162 guarantee_property(
3163 valid_symbol_at(attribute_name_index),
3164 "Invalid Record attribute name index %u in class file %s",
3165 attribute_name_index, CHECK_0);
3166
3167 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3168 if (attribute_name == vmSymbols::tag_signature()) {
3169 if (generic_sig_index != 0) {
3170 classfile_parse_error(
3171 "Multiple Signature attributes for Record component in class file %s",
3172 THREAD);
3173 return 0;
3174 }
3175 if (attribute_length != 2) {
3176 classfile_parse_error(
3177 "Invalid Signature attribute length %u in Record component in class file %s",
3178 attribute_length, THREAD);
3179 return 0;
3180 }
3181 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3182
3183 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3184 if (runtime_visible_annotations != nullptr) {
3185 classfile_parse_error(
3186 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3187 return 0;
3188 }
3189 runtime_visible_annotations_length = attribute_length;
3190 runtime_visible_annotations = cfs->current();
3191
3192 assert(runtime_visible_annotations != nullptr, "null record component visible annotation");
3193 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3194 cfs->skip_u1_fast(runtime_visible_annotations_length);
3195
3196 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3197 if (runtime_invisible_annotations_exists) {
3198 classfile_parse_error(
3199 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3200 return 0;
3201 }
3202 runtime_invisible_annotations_exists = true;
3203 cfs->skip_u1(attribute_length, CHECK_0);
3204
3205 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3206 if (runtime_visible_type_annotations != nullptr) {
3207 classfile_parse_error(
3208 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3209 return 0;
3210 }
3211 runtime_visible_type_annotations_length = attribute_length;
3212 runtime_visible_type_annotations = cfs->current();
3213
3214 assert(runtime_visible_type_annotations != nullptr, "null record component visible type annotation");
3215 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3216 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3217
3218 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3219 if (runtime_invisible_type_annotations_exists) {
3220 classfile_parse_error(
3221 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3222 return 0;
3223 }
3224 runtime_invisible_type_annotations_exists = true;
3225 cfs->skip_u1(attribute_length, CHECK_0);
3226
3227 } else {
3228 // Skip unknown attributes
3229 cfs->skip_u1(attribute_length, CHECK_0);
3230 }
3231 calculate_attr_size += attribute_length;
3232 } // End of attributes For loop
3233
3234 AnnotationArray* annotations = allocate_annotations(runtime_visible_annotations,
3235 runtime_visible_annotations_length,
3236 CHECK_0);
3237 AnnotationArray* type_annotations = allocate_annotations(runtime_visible_type_annotations,
3238 runtime_visible_type_annotations_length,
3239 CHECK_0);
3240
3241 RecordComponent* record_component =
3242 RecordComponent::allocate(_loader_data, name_index, descriptor_index, generic_sig_index,
3243 annotations, type_annotations, CHECK_0);
3244 record_components->at_put(x, record_component);
3245 } // End of component processing loop
3246
3247 // Restore buffer's current position.
3248 cfs->set_current(current_mark);
3249 return calculate_attr_size;
3250 }
3251
3252 void ClassFileParser::parse_classfile_synthetic_attribute() {
3253 set_class_synthetic_flag(true);
3254 }
3255
3256 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3257 assert(cfs != nullptr, "invariant");
3258
3259 const u2 signature_index = cfs->get_u2(CHECK);
3260 guarantee_property(
3261 valid_symbol_at(signature_index),
3262 "Invalid constant pool index %u in Signature attribute in class file %s",
3263 signature_index, CHECK);
3264 set_class_generic_signature_index(signature_index);
3265 }
3266
3267 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3268 ConstantPool* cp,
3269 u4 attribute_byte_length,
3270 TRAPS) {
3271 assert(cfs != nullptr, "invariant");
3272 assert(cp != nullptr, "invariant");
3273
3274 const u1* const current_start = cfs->current();
3275
3276 guarantee_property(attribute_byte_length >= sizeof(u2),
3277 "Invalid BootstrapMethods attribute length %u in class file %s",
3278 attribute_byte_length,
3279 CHECK);
3280
3281 cfs->guarantee_more(attribute_byte_length, CHECK);
3282
3283 const int attribute_array_length = cfs->get_u2_fast();
3284
3285 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3286 "Short length on BootstrapMethods in class file %s",
3287 CHECK);
3288
3289
3290 // The attribute contains a counted array of counted tuples of shorts,
3291 // represending bootstrap specifiers:
3292 // length*{bootstrap_method_index, argument_count*{argument_index}}
3293 const unsigned int operand_count = (attribute_byte_length - (unsigned)sizeof(u2)) / (unsigned)sizeof(u2);
3294 // operand_count = number of shorts in attr, except for leading length
3295
3296 // The attribute is copied into a short[] array.
3297 // The array begins with a series of short[2] pairs, one for each tuple.
3298 const int index_size = (attribute_array_length * 2);
3299
3300 Array<u2>* const operands =
3301 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3302
3303 // Eagerly assign operands so they will be deallocated with the constant
3304 // pool if there is an error.
3305 cp->set_operands(operands);
3306
3307 int operand_fill_index = index_size;
3308 const int cp_size = cp->length();
3309
3310 for (int n = 0; n < attribute_array_length; n++) {
3311 // Store a 32-bit offset into the header of the operand array.
3312 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3313
3314 // Read a bootstrap specifier.
3315 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3316 const u2 bootstrap_method_index = cfs->get_u2_fast();
3317 const u2 argument_count = cfs->get_u2_fast();
3318 guarantee_property(
3319 valid_cp_range(bootstrap_method_index, cp_size) &&
3320 cp->tag_at(bootstrap_method_index).is_method_handle(),
3321 "bootstrap_method_index %u has bad constant type in class file %s",
3322 bootstrap_method_index,
3323 CHECK);
3324
3325 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3326 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3327 CHECK);
3328
3329 operands->at_put(operand_fill_index++, bootstrap_method_index);
3330 operands->at_put(operand_fill_index++, argument_count);
3331
3332 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3333 for (int j = 0; j < argument_count; j++) {
3334 const u2 argument_index = cfs->get_u2_fast();
3335 guarantee_property(
3336 valid_cp_range(argument_index, cp_size) &&
3337 cp->tag_at(argument_index).is_loadable_constant(),
3338 "argument_index %u has bad constant type in class file %s",
3339 argument_index,
3340 CHECK);
3341 operands->at_put(operand_fill_index++, argument_index);
3342 }
3343 }
3344 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3345 "Bad length on BootstrapMethods in class file %s",
3346 CHECK);
3347 }
3348
3349 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3350 ConstantPool* cp,
3351 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3352 TRAPS) {
3353 assert(cfs != nullptr, "invariant");
3354 assert(cp != nullptr, "invariant");
3355 assert(parsed_annotations != nullptr, "invariant");
3356
3357 // Set inner classes attribute to default sentinel
3358 _inner_classes = Universe::the_empty_short_array();
3359 // Set nest members attribute to default sentinel
3360 _nest_members = Universe::the_empty_short_array();
3361 // Set _permitted_subclasses attribute to default sentinel
3362 _permitted_subclasses = Universe::the_empty_short_array();
3363 cfs->guarantee_more(2, CHECK); // attributes_count
3364 u2 attributes_count = cfs->get_u2_fast();
3365 bool parsed_sourcefile_attribute = false;
3366 bool parsed_innerclasses_attribute = false;
3367 bool parsed_nest_members_attribute = false;
3368 bool parsed_permitted_subclasses_attribute = false;
3369 bool parsed_nest_host_attribute = false;
3370 bool parsed_record_attribute = false;
3371 bool parsed_enclosingmethod_attribute = false;
3372 bool parsed_bootstrap_methods_attribute = false;
3373 const u1* runtime_visible_annotations = nullptr;
3374 int runtime_visible_annotations_length = 0;
3375 const u1* runtime_visible_type_annotations = nullptr;
3376 int runtime_visible_type_annotations_length = 0;
3377 bool runtime_invisible_type_annotations_exists = false;
3378 bool runtime_invisible_annotations_exists = false;
3379 bool parsed_source_debug_ext_annotations_exist = false;
3380 const u1* inner_classes_attribute_start = nullptr;
3381 u4 inner_classes_attribute_length = 0;
3382 u2 enclosing_method_class_index = 0;
3383 u2 enclosing_method_method_index = 0;
3384 const u1* nest_members_attribute_start = nullptr;
3385 u4 nest_members_attribute_length = 0;
3386 const u1* record_attribute_start = nullptr;
3387 u4 record_attribute_length = 0;
3388 const u1* permitted_subclasses_attribute_start = nullptr;
3389 u4 permitted_subclasses_attribute_length = 0;
3390
3391 // Iterate over attributes
3392 while (attributes_count--) {
3393 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3394 const u2 attribute_name_index = cfs->get_u2_fast();
3395 const u4 attribute_length = cfs->get_u4_fast();
3396 guarantee_property(
3397 valid_symbol_at(attribute_name_index),
3398 "Attribute name has bad constant pool index %u in class file %s",
3399 attribute_name_index, CHECK);
3400 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3401 if (tag == vmSymbols::tag_source_file()) {
3402 // Check for SourceFile tag
3403 if (_need_verify) {
3404 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3405 }
3406 if (parsed_sourcefile_attribute) {
3407 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3408 return;
3409 } else {
3410 parsed_sourcefile_attribute = true;
3411 }
3412 parse_classfile_sourcefile_attribute(cfs, CHECK);
3413 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3414 // Check for SourceDebugExtension tag
3415 if (parsed_source_debug_ext_annotations_exist) {
3416 classfile_parse_error(
3417 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3418 return;
3419 }
3420 parsed_source_debug_ext_annotations_exist = true;
3421 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3422 } else if (tag == vmSymbols::tag_inner_classes()) {
3423 // Check for InnerClasses tag
3424 if (parsed_innerclasses_attribute) {
3425 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3426 return;
3427 } else {
3428 parsed_innerclasses_attribute = true;
3429 }
3430 inner_classes_attribute_start = cfs->current();
3431 inner_classes_attribute_length = attribute_length;
3432 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3433 } else if (tag == vmSymbols::tag_synthetic()) {
3434 // Check for Synthetic tag
3435 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3436 if (attribute_length != 0) {
3437 classfile_parse_error(
3438 "Invalid Synthetic classfile attribute length %u in class file %s",
3439 attribute_length, THREAD);
3440 return;
3441 }
3442 parse_classfile_synthetic_attribute();
3443 } else if (tag == vmSymbols::tag_deprecated()) {
3444 // Check for Deprecated tag - 4276120
3445 if (attribute_length != 0) {
3446 classfile_parse_error(
3447 "Invalid Deprecated classfile attribute length %u in class file %s",
3448 attribute_length, THREAD);
3449 return;
3450 }
3451 } else if (_major_version >= JAVA_1_5_VERSION) {
3452 if (tag == vmSymbols::tag_signature()) {
3453 if (_generic_signature_index != 0) {
3454 classfile_parse_error(
3455 "Multiple Signature attributes in class file %s", THREAD);
3456 return;
3457 }
3458 if (attribute_length != 2) {
3459 classfile_parse_error(
3460 "Wrong Signature attribute length %u in class file %s",
3461 attribute_length, THREAD);
3462 return;
3463 }
3464 parse_classfile_signature_attribute(cfs, CHECK);
3465 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3466 if (runtime_visible_annotations != nullptr) {
3467 classfile_parse_error(
3468 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3469 return;
3470 }
3471 runtime_visible_annotations_length = attribute_length;
3472 runtime_visible_annotations = cfs->current();
3473 assert(runtime_visible_annotations != nullptr, "null visible annotations");
3474 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3475 parse_annotations(cp,
3476 runtime_visible_annotations,
3477 runtime_visible_annotations_length,
3478 parsed_annotations,
3479 _loader_data,
3480 _can_access_vm_annotations);
3481 cfs->skip_u1_fast(runtime_visible_annotations_length);
3482 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3483 if (runtime_invisible_annotations_exists) {
3484 classfile_parse_error(
3485 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3486 return;
3487 }
3488 runtime_invisible_annotations_exists = true;
3489 cfs->skip_u1(attribute_length, CHECK);
3490 } else if (tag == vmSymbols::tag_enclosing_method()) {
3491 if (parsed_enclosingmethod_attribute) {
3492 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3493 return;
3494 } else {
3495 parsed_enclosingmethod_attribute = true;
3496 }
3497 guarantee_property(attribute_length == 4,
3498 "Wrong EnclosingMethod attribute length %u in class file %s",
3499 attribute_length, CHECK);
3500 cfs->guarantee_more(4, CHECK); // class_index, method_index
3501 enclosing_method_class_index = cfs->get_u2_fast();
3502 enclosing_method_method_index = cfs->get_u2_fast();
3503 if (enclosing_method_class_index == 0) {
3504 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3505 return;
3506 }
3507 // Validate the constant pool indices and types
3508 guarantee_property(valid_klass_reference_at(enclosing_method_class_index),
3509 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3510 if (enclosing_method_method_index != 0 &&
3511 (!cp->is_within_bounds(enclosing_method_method_index) ||
3512 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3513 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3514 return;
3515 }
3516 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3517 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3518 if (parsed_bootstrap_methods_attribute) {
3519 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3520 return;
3521 }
3522 parsed_bootstrap_methods_attribute = true;
3523 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3524 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3525 if (runtime_visible_type_annotations != nullptr) {
3526 classfile_parse_error(
3527 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3528 return;
3529 }
3530 runtime_visible_type_annotations_length = attribute_length;
3531 runtime_visible_type_annotations = cfs->current();
3532 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
3533 // No need for the VM to parse Type annotations
3534 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3535 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3536 if (runtime_invisible_type_annotations_exists) {
3537 classfile_parse_error(
3538 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3539 return;
3540 }
3541 runtime_invisible_type_annotations_exists = true;
3542 cfs->skip_u1(attribute_length, CHECK);
3543 } else if (_major_version >= JAVA_11_VERSION) {
3544 if (tag == vmSymbols::tag_nest_members()) {
3545 // Check for NestMembers tag
3546 if (parsed_nest_members_attribute) {
3547 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3548 return;
3549 } else {
3550 parsed_nest_members_attribute = true;
3551 }
3552 if (parsed_nest_host_attribute) {
3553 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3554 return;
3555 }
3556 nest_members_attribute_start = cfs->current();
3557 nest_members_attribute_length = attribute_length;
3558 cfs->skip_u1(nest_members_attribute_length, CHECK);
3559 } else if (tag == vmSymbols::tag_nest_host()) {
3560 if (parsed_nest_host_attribute) {
3561 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
3562 return;
3563 } else {
3564 parsed_nest_host_attribute = true;
3565 }
3566 if (parsed_nest_members_attribute) {
3567 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
3568 return;
3569 }
3570 if (_need_verify) {
3571 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3572 }
3573 cfs->guarantee_more(2, CHECK);
3574 u2 class_info_index = cfs->get_u2_fast();
3575 guarantee_property(
3576 valid_klass_reference_at(class_info_index),
3577 "Nest-host class_info_index %u has bad constant type in class file %s",
3578 class_info_index, CHECK);
3579 _nest_host = class_info_index;
3580
3581 } else if (_major_version >= JAVA_16_VERSION) {
3582 if (tag == vmSymbols::tag_record()) {
3583 if (parsed_record_attribute) {
3584 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
3585 return;
3586 }
3587 parsed_record_attribute = true;
3588 record_attribute_start = cfs->current();
3589 record_attribute_length = attribute_length;
3590 } else if (_major_version >= JAVA_17_VERSION) {
3591 if (tag == vmSymbols::tag_permitted_subclasses()) {
3592 if (parsed_permitted_subclasses_attribute) {
3593 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3594 return;
3595 }
3596 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3597 if (_access_flags.is_final()) {
3598 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3599 return;
3600 }
3601 parsed_permitted_subclasses_attribute = true;
3602 permitted_subclasses_attribute_start = cfs->current();
3603 permitted_subclasses_attribute_length = attribute_length;
3604 }
3605 }
3606 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3607 cfs->skip_u1(attribute_length, CHECK);
3608 } else {
3609 // Unknown attribute
3610 cfs->skip_u1(attribute_length, CHECK);
3611 }
3612 } else {
3613 // Unknown attribute
3614 cfs->skip_u1(attribute_length, CHECK);
3615 }
3616 } else {
3617 // Unknown attribute
3618 cfs->skip_u1(attribute_length, CHECK);
3619 }
3620 }
3621 _class_annotations = allocate_annotations(runtime_visible_annotations,
3622 runtime_visible_annotations_length,
3623 CHECK);
3624 _class_type_annotations = allocate_annotations(runtime_visible_type_annotations,
3625 runtime_visible_type_annotations_length,
3626 CHECK);
3627
3628 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3629 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3630 cfs,
3631 cp,
3632 inner_classes_attribute_start,
3633 parsed_innerclasses_attribute,
3634 enclosing_method_class_index,
3635 enclosing_method_method_index,
3636 CHECK);
3637 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3638 guarantee_property(
3639 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3640 "Wrong InnerClasses attribute length in class file %s", CHECK);
3641 }
3642 }
3643
3644 if (parsed_nest_members_attribute) {
3645 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3646 cfs,
3647 nest_members_attribute_start,
3648 CHECK);
3649 if (_need_verify) {
3650 guarantee_property(
3651 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3652 "Wrong NestMembers attribute length in class file %s", CHECK);
3653 }
3654 }
3655
3656 if (parsed_record_attribute) {
3657 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
3658 cfs,
3659 cp,
3660 record_attribute_start,
3661 CHECK);
3662 if (_need_verify) {
3663 guarantee_property(record_attribute_length == calculated_attr_length,
3664 "Record attribute has wrong length in class file %s",
3665 CHECK);
3666 }
3667 }
3668
3669 if (parsed_permitted_subclasses_attribute) {
3670 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3671 cfs,
3672 permitted_subclasses_attribute_start,
3673 CHECK);
3674 if (_need_verify) {
3675 guarantee_property(
3676 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3677 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3678 }
3679 }
3680
3681 if (_max_bootstrap_specifier_index >= 0) {
3682 guarantee_property(parsed_bootstrap_methods_attribute,
3683 "Missing BootstrapMethods attribute in class file %s", CHECK);
3684 }
3685 }
3686
3687 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3688 assert(k != nullptr, "invariant");
3689
3690 if (_synthetic_flag)
3691 k->set_is_synthetic();
3692 if (_sourcefile_index != 0) {
3693 k->set_source_file_name_index(_sourcefile_index);
3694 }
3695 if (_generic_signature_index != 0) {
3696 k->set_generic_signature_index(_generic_signature_index);
3697 }
3698 if (_sde_buffer != nullptr) {
3699 k->set_source_debug_extension(_sde_buffer, _sde_length);
3700 }
3701 }
3702
3703 // Create the Annotations object that will
3704 // hold the annotations array for the Klass.
3705 void ClassFileParser::create_combined_annotations(TRAPS) {
3706 if (_class_annotations == nullptr &&
3707 _class_type_annotations == nullptr &&
3708 _fields_annotations == nullptr &&
3709 _fields_type_annotations == nullptr) {
3710 // Don't create the Annotations object unnecessarily.
3711 return;
3712 }
3713
3714 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3715 annotations->set_class_annotations(_class_annotations);
3716 annotations->set_class_type_annotations(_class_type_annotations);
3717 annotations->set_fields_annotations(_fields_annotations);
3718 annotations->set_fields_type_annotations(_fields_type_annotations);
3719
3720 // This is the Annotations object that will be
3721 // assigned to InstanceKlass being constructed.
3722 _combined_annotations = annotations;
3723
3724 // The annotations arrays below has been transferred the
3725 // _combined_annotations so these fields can now be cleared.
3726 _class_annotations = nullptr;
3727 _class_type_annotations = nullptr;
3728 _fields_annotations = nullptr;
3729 _fields_type_annotations = nullptr;
3730 }
3731
3732 // Transfer ownership of metadata allocated to the InstanceKlass.
3733 void ClassFileParser::apply_parsed_class_metadata(
3734 InstanceKlass* this_klass,
3735 int java_fields_count) {
3736 assert(this_klass != nullptr, "invariant");
3737
3738 _cp->set_pool_holder(this_klass);
3739 this_klass->set_constants(_cp);
3740 this_klass->set_fieldinfo_stream(_fieldinfo_stream);
3741 this_klass->set_fields_status(_fields_status);
3742 this_klass->set_methods(_methods);
3743 this_klass->set_inner_classes(_inner_classes);
3744 this_klass->set_nest_members(_nest_members);
3745 this_klass->set_nest_host_index(_nest_host);
3746 this_klass->set_annotations(_combined_annotations);
3747 this_klass->set_permitted_subclasses(_permitted_subclasses);
3748 this_klass->set_record_components(_record_components);
3749
3750 // Initialize cached modifier_flags to support Class.getModifiers().
3751 // This must follow setting inner_class attributes.
3752 u2 computed_modifiers = this_klass->compute_modifier_flags();
3753 this_klass->set_modifier_flags(computed_modifiers);
3754
3755 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3756 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3757 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3758 // its _super. If an OOM occurs while loading the current klass, its _super field
3759 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3760 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3761 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3762
3763 // Clear out these fields so they don't get deallocated by the destructor
3764 clear_class_metadata();
3765 }
3766
3767 AnnotationArray* ClassFileParser::allocate_annotations(const u1* const anno,
3768 int anno_length,
3769 TRAPS) {
3770 AnnotationArray* annotations = nullptr;
3771 if (anno != nullptr) {
3772 annotations = MetadataFactory::new_array<u1>(_loader_data,
3773 anno_length,
3774 CHECK_(annotations));
3775 for (int i = 0; i < anno_length; i++) {
3776 annotations->at_put(i, anno[i]);
3777 }
3778 }
3779 return annotations;
3780 }
3781
3782 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3783 const int super_class_index,
3784 const bool need_verify,
3785 TRAPS) {
3786 assert(cp != nullptr, "invariant");
3787 const InstanceKlass* super_klass = nullptr;
3788
3789 if (super_class_index == 0) {
3790 guarantee_property(_class_name == vmSymbols::java_lang_Object(),
3791 "Invalid superclass index %u in class file %s",
3792 super_class_index,
3793 CHECK_NULL);
3794 } else {
3795 guarantee_property(valid_klass_reference_at(super_class_index),
3796 "Invalid superclass index %u in class file %s",
3797 super_class_index,
3798 CHECK_NULL);
3799 // The class name should be legal because it is checked when parsing constant pool.
3800 // However, make sure it is not an array type.
3801 bool is_array = false;
3802 if (cp->tag_at(super_class_index).is_klass()) {
3803 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3804 if (need_verify)
3805 is_array = super_klass->is_array_klass();
3806 } else if (need_verify) {
3807 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3808 }
3809 if (need_verify) {
3810 guarantee_property(!is_array,
3811 "Bad superclass name in class file %s", CHECK_NULL);
3812 }
3813 }
3814 return super_klass;
3815 }
3816
3817 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
3818 _max_nonstatic_oop_maps = max_blocks;
3819 _nonstatic_oop_map_count = 0;
3820 if (max_blocks == 0) {
3821 _nonstatic_oop_maps = nullptr;
3822 } else {
3823 _nonstatic_oop_maps =
3824 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
3825 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3826 }
3827 }
3828
3829 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
3830 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
3831 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
3832 }
3833
3834 // addition of super oop maps
3835 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3836 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
3837 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
3838
3839 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3840 _nonstatic_oop_map_count += nof_blocks;
3841 }
3842
3843 // collection of oops
3844 void OopMapBlocksBuilder::add(int offset, int count) {
3845 if (_nonstatic_oop_map_count == 0) {
3846 _nonstatic_oop_map_count++;
3847 }
3848 OopMapBlock* nonstatic_oop_map = last_oop_map();
3849 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3850 nonstatic_oop_map->set_offset(offset);
3851 nonstatic_oop_map->set_count(count);
3852 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3853 nonstatic_oop_map->increment_count(count);
3854 } else { // Need a new one...
3855 _nonstatic_oop_map_count++;
3856 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
3857 nonstatic_oop_map = last_oop_map();
3858 nonstatic_oop_map->set_offset(offset);
3859 nonstatic_oop_map->set_count(count);
3860 }
3861 }
3862
3863 // general purpose copy, e.g. into allocated instanceKlass
3864 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
3865 if (_nonstatic_oop_map_count != 0) {
3866 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
3867 }
3868 }
3869
3870 // Sort and compact adjacent blocks
3871 void OopMapBlocksBuilder::compact() {
3872 if (_nonstatic_oop_map_count <= 1) {
3873 return;
3874 }
3875 /*
3876 * Since field layout sneaks in oops before values, we will be able to condense
3877 * blocks. There is potential to compact between super, own refs and values
3878 * containing refs.
3879 *
3880 * Currently compaction is slightly limited due to values being 8 byte aligned.
3881 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
3882 * and maybe it doesn't need to be.
3883 */
3884 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
3885 (_sort_Fn)OopMapBlock::compare_offset);
3886 if (_nonstatic_oop_map_count < 2) {
3887 return;
3888 }
3889
3890 // Make a temp copy, and iterate through and copy back into the original
3891 ResourceMark rm;
3892 OopMapBlock* oop_maps_copy =
3893 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
3894 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
3895 copy(oop_maps_copy);
3896 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
3897 unsigned int new_count = 1;
3898 oop_maps_copy++;
3899 while(oop_maps_copy < oop_maps_copy_end) {
3900 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3901 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3902 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3903 } else {
3904 nonstatic_oop_map++;
3905 new_count++;
3906 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3907 nonstatic_oop_map->set_count(oop_maps_copy->count());
3908 }
3909 oop_maps_copy++;
3910 }
3911 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
3912 _nonstatic_oop_map_count = new_count;
3913 }
3914
3915 void OopMapBlocksBuilder::print_on(outputStream* st) const {
3916 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
3917 if (_nonstatic_oop_map_count > 0) {
3918 OopMapBlock* map = _nonstatic_oop_maps;
3919 OopMapBlock* last_map = last_oop_map();
3920 assert(map <= last_map, "Last less than first");
3921 while (map <= last_map) {
3922 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3923 map->offset() + map->offset_span() - heapOopSize, map->count());
3924 map++;
3925 }
3926 }
3927 }
3928
3929 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
3930 print_on(st);
3931 }
3932
3933 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
3934 assert(ik != nullptr, "invariant");
3935
3936 const InstanceKlass* const super = ik->java_super();
3937
3938 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3939 // in which case we don't have to register objects as finalizable
3940 if (!_has_empty_finalizer) {
3941 if (_has_finalizer ||
3942 (super != nullptr && super->has_finalizer())) {
3943 ik->set_has_finalizer();
3944 }
3945 }
3946
3947 #ifdef ASSERT
3948 bool f = false;
3949 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
3950 vmSymbols::void_method_signature());
3951 if (InstanceKlass::is_finalization_enabled() &&
3952 (m != nullptr) && !m->is_empty_method()) {
3953 f = true;
3954 }
3955
3956 // Spec doesn't prevent agent from redefinition of empty finalizer.
3957 // Despite the fact that it's generally bad idea and redefined finalizer
3958 // will not work as expected we shouldn't abort vm in this case
3959 if (!ik->has_redefined_this_or_super()) {
3960 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
3961 }
3962 #endif
3963
3964 // Check if this klass supports the java.lang.Cloneable interface
3965 if (vmClasses::Cloneable_klass_loaded()) {
3966 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
3967 ik->set_is_cloneable();
3968 }
3969 }
3970
3971 // If it cannot be fast-path allocated, set a bit in the layout helper.
3972 // See documentation of InstanceKlass::can_be_fastpath_allocated().
3973 assert(ik->size_helper() > 0, "layout_helper is initialized");
3974 if (ik->is_abstract() || ik->is_interface()
3975 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == nullptr)
3976 || ik->size_helper() >= FastAllocateSizeLimit) {
3977 // Forbid fast-path allocation.
3978 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
3979 ik->set_layout_helper(lh);
3980 }
3981 }
3982
3983 // utility methods for appending an array with check for duplicates
3984
3985 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
3986 const Array<InstanceKlass*>* const ifs) {
3987 // iterate over new interfaces
3988 for (int i = 0; i < ifs->length(); i++) {
3989 InstanceKlass* const e = ifs->at(i);
3990 assert(e->is_klass() && e->is_interface(), "just checking");
3991 // add new interface
3992 result->append_if_missing(e);
3993 }
3994 }
3995
3996 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
3997 Array<InstanceKlass*>* local_ifs,
3998 ClassLoaderData* loader_data,
3999 TRAPS) {
4000 assert(local_ifs != nullptr, "invariant");
4001 assert(loader_data != nullptr, "invariant");
4002
4003 // Compute maximum size for transitive interfaces
4004 int max_transitive_size = 0;
4005 int super_size = 0;
4006 // Add superclass transitive interfaces size
4007 if (super != nullptr) {
4008 super_size = super->transitive_interfaces()->length();
4009 max_transitive_size += super_size;
4010 }
4011 // Add local interfaces' super interfaces
4012 const int local_size = local_ifs->length();
4013 for (int i = 0; i < local_size; i++) {
4014 InstanceKlass* const l = local_ifs->at(i);
4015 max_transitive_size += l->transitive_interfaces()->length();
4016 }
4017 // Finally add local interfaces
4018 max_transitive_size += local_size;
4019 // Construct array
4020 if (max_transitive_size == 0) {
4021 // no interfaces, use canonicalized array
4022 return Universe::the_empty_instance_klass_array();
4023 } else if (max_transitive_size == super_size) {
4024 // no new local interfaces added, share superklass' transitive interface array
4025 return super->transitive_interfaces();
4026 } else if (max_transitive_size == local_size) {
4027 // only local interfaces added, share local interface array
4028 return local_ifs;
4029 } else {
4030 ResourceMark rm;
4031 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4032
4033 // Copy down from superclass
4034 if (super != nullptr) {
4035 append_interfaces(result, super->transitive_interfaces());
4036 }
4037
4038 // Copy down from local interfaces' superinterfaces
4039 for (int i = 0; i < local_size; i++) {
4040 InstanceKlass* const l = local_ifs->at(i);
4041 append_interfaces(result, l->transitive_interfaces());
4042 }
4043 // Finally add local interfaces
4044 append_interfaces(result, local_ifs);
4045
4046 // length will be less than the max_transitive_size if duplicates were removed
4047 const int length = result->length();
4048 assert(length <= max_transitive_size, "just checking");
4049 Array<InstanceKlass*>* const new_result =
4050 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4051 for (int i = 0; i < length; i++) {
4052 InstanceKlass* const e = result->at(i);
4053 assert(e != nullptr, "just checking");
4054 new_result->at_put(i, e);
4055 }
4056 return new_result;
4057 }
4058 }
4059
4060 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4061 assert(this_klass != nullptr, "invariant");
4062 const Klass* const super = this_klass->super();
4063
4064 if (super != nullptr) {
4065 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4066
4067 if (super->is_final()) {
4068 classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4069 return;
4070 }
4071
4072 if (super_ik->is_sealed()) {
4073 stringStream ss;
4074 ResourceMark rm(THREAD);
4075 if (!super_ik->has_as_permitted_subclass(this_klass, ss)) {
4076 classfile_icce_error(ss.as_string(), THREAD);
4077 return;
4078 }
4079 }
4080
4081 Reflection::VerifyClassAccessResults vca_result =
4082 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4083 if (vca_result != Reflection::ACCESS_OK) {
4084 ResourceMark rm(THREAD);
4085 char* msg = Reflection::verify_class_access_msg(this_klass,
4086 InstanceKlass::cast(super),
4087 vca_result);
4088
4089 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4090 if (msg == nullptr) {
4091 bool same_module = (this_klass->module() == super->module());
4092 Exceptions::fthrow(
4093 THREAD_AND_LOCATION,
4094 vmSymbols::java_lang_IllegalAccessError(),
4095 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4096 this_klass->external_name(),
4097 super->is_abstract() ? "abstract " : "",
4098 super->external_name(),
4099 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4100 (same_module) ? "" : "; ",
4101 (same_module) ? "" : super->class_in_module_of_loader());
4102 } else {
4103 // Add additional message content.
4104 Exceptions::fthrow(
4105 THREAD_AND_LOCATION,
4106 vmSymbols::java_lang_IllegalAccessError(),
4107 "superclass access check failed: %s",
4108 msg);
4109 }
4110 }
4111 }
4112 }
4113
4114
4115 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4116 assert(this_klass != nullptr, "invariant");
4117 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4118 const int lng = local_interfaces->length();
4119 for (int i = lng - 1; i >= 0; i--) {
4120 InstanceKlass* const k = local_interfaces->at(i);
4121 assert (k != nullptr && k->is_interface(), "invalid interface");
4122
4123 if (k->is_sealed()) {
4124 stringStream ss;
4125 ResourceMark rm(THREAD);
4126 if (!k->has_as_permitted_subclass(this_klass, ss)) {
4127 classfile_icce_error(ss.as_string(), THREAD);
4128 return;
4129 }
4130 }
4131
4132 Reflection::VerifyClassAccessResults vca_result =
4133 Reflection::verify_class_access(this_klass, k, false);
4134 if (vca_result != Reflection::ACCESS_OK) {
4135 ResourceMark rm(THREAD);
4136 char* msg = Reflection::verify_class_access_msg(this_klass,
4137 k,
4138 vca_result);
4139
4140 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4141 if (msg == nullptr) {
4142 bool same_module = (this_klass->module() == k->module());
4143 Exceptions::fthrow(
4144 THREAD_AND_LOCATION,
4145 vmSymbols::java_lang_IllegalAccessError(),
4146 "class %s cannot access its superinterface %s (%s%s%s)",
4147 this_klass->external_name(),
4148 k->external_name(),
4149 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4150 (same_module) ? "" : "; ",
4151 (same_module) ? "" : k->class_in_module_of_loader());
4152 return;
4153 } else {
4154 // Add additional message content.
4155 Exceptions::fthrow(
4156 THREAD_AND_LOCATION,
4157 vmSymbols::java_lang_IllegalAccessError(),
4158 "superinterface check failed: %s",
4159 msg);
4160 return;
4161 }
4162 }
4163 }
4164 }
4165
4166
4167 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4168 assert(this_klass != nullptr, "invariant");
4169 const Array<Method*>* const methods = this_klass->methods();
4170 const int num_methods = methods->length();
4171
4172 // go thru each method and check if it overrides a final method
4173 for (int index = 0; index < num_methods; index++) {
4174 const Method* const m = methods->at(index);
4175
4176 // skip private, static, and <init> methods
4177 if ((!m->is_private() && !m->is_static()) &&
4178 (m->name() != vmSymbols::object_initializer_name())) {
4179
4180 const Symbol* const name = m->name();
4181 const Symbol* const signature = m->signature();
4182 const InstanceKlass* k = this_klass->java_super();
4183 const Method* super_m = nullptr;
4184 while (k != nullptr) {
4185 // skip supers that don't have final methods.
4186 if (k->has_final_method()) {
4187 // lookup a matching method in the super class hierarchy
4188 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4189 if (super_m == nullptr) {
4190 break; // didn't find any match; get out
4191 }
4192
4193 if (super_m->is_final() && !super_m->is_static() &&
4194 !super_m->access_flags().is_private()) {
4195 // matching method in super is final, and not static or private
4196 bool can_access = Reflection::verify_member_access(this_klass,
4197 super_m->method_holder(),
4198 super_m->method_holder(),
4199 super_m->access_flags(),
4200 false, false, CHECK);
4201 if (can_access) {
4202 // this class can access super final method and therefore override
4203 ResourceMark rm(THREAD);
4204 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4205 err_msg("class %s overrides final method %s.%s%s",
4206 this_klass->external_name(),
4207 super_m->method_holder()->external_name(),
4208 name->as_C_string(),
4209 signature->as_C_string()));
4210 }
4211 }
4212
4213 // continue to look from super_m's holder's super.
4214 k = super_m->method_holder()->java_super();
4215 continue;
4216 }
4217
4218 k = k->java_super();
4219 }
4220 }
4221 }
4222 }
4223
4224
4225 // assumes that this_klass is an interface
4226 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4227 assert(this_klass != nullptr, "invariant");
4228 assert(this_klass->is_interface(), "not an interface");
4229 const Array<Method*>* methods = this_klass->methods();
4230 const int num_methods = methods->length();
4231
4232 for (int index = 0; index < num_methods; index++) {
4233 const Method* const m = methods->at(index);
4234 // if m is static and not the init method, throw a verify error
4235 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4236 ResourceMark rm(THREAD);
4237
4238 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4239 Exceptions::fthrow(
4240 THREAD_AND_LOCATION,
4241 vmSymbols::java_lang_VerifyError(),
4242 "Illegal static method %s in interface %s",
4243 m->name()->as_C_string(),
4244 this_klass->external_name()
4245 );
4246 return;
4247 }
4248 }
4249 }
4250
4251 // utility methods for format checking
4252
4253 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4254 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4255 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4256 if (is_module) {
4257 ResourceMark rm(THREAD);
4258 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4259 Exceptions::fthrow(
4260 THREAD_AND_LOCATION,
4261 vmSymbols::java_lang_NoClassDefFoundError(),
4262 "%s is not a class because access_flag ACC_MODULE is set",
4263 _class_name->as_C_string());
4264 return;
4265 }
4266
4267 if (!_need_verify) { return; }
4268
4269 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4270 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4271 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4272 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4273 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4274 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4275 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4276
4277 if ((is_abstract && is_final) ||
4278 (is_interface && !is_abstract) ||
4279 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4280 (!is_interface && major_gte_1_5 && is_annotation)) {
4281 ResourceMark rm(THREAD);
4282 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4283 Exceptions::fthrow(
4284 THREAD_AND_LOCATION,
4285 vmSymbols::java_lang_ClassFormatError(),
4286 "Illegal class modifiers in class %s: 0x%X",
4287 _class_name->as_C_string(), flags
4288 );
4289 return;
4290 }
4291 }
4292
4293 static bool has_illegal_visibility(jint flags) {
4294 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4295 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4296 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4297
4298 return ((is_public && is_protected) ||
4299 (is_public && is_private) ||
4300 (is_protected && is_private));
4301 }
4302
4303 // A legal major_version.minor_version must be one of the following:
4304 //
4305 // Major_version >= 45 and major_version < 56, any minor_version.
4306 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4307 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4308 //
4309 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4310 ResourceMark rm(THREAD);
4311 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4312 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4313 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4314 class_name, major, minor, THREAD);
4315 return;
4316 }
4317
4318 if (major > max_version) {
4319 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4320 Exceptions::fthrow(
4321 THREAD_AND_LOCATION,
4322 vmSymbols::java_lang_UnsupportedClassVersionError(),
4323 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4324 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4325 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4326 return;
4327 }
4328
4329 if (major < JAVA_12_VERSION || minor == 0) {
4330 return;
4331 }
4332
4333 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4334 if (major != max_version) {
4335 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4336 Exceptions::fthrow(
4337 THREAD_AND_LOCATION,
4338 vmSymbols::java_lang_UnsupportedClassVersionError(),
4339 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4340 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4341 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4342 return;
4343 }
4344
4345 if (!Arguments::enable_preview()) {
4346 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4347 class_name, major, minor, THREAD);
4348 return;
4349 }
4350
4351 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4352 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4353 class_name, major, minor, THREAD);
4354 }
4355 }
4356
4357 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4358 bool is_interface,
4359 TRAPS) const {
4360 if (!_need_verify) { return; }
4361
4362 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4363 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4364 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4365 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4366 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4367 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4368 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4369 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4370 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4371
4372 bool is_illegal = false;
4373
4374 if (is_interface) {
4375 if (!is_public || !is_static || !is_final || is_private ||
4376 is_protected || is_volatile || is_transient ||
4377 (major_gte_1_5 && is_enum)) {
4378 is_illegal = true;
4379 }
4380 } else { // not interface
4381 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4382 is_illegal = true;
4383 }
4384 }
4385
4386 if (is_illegal) {
4387 ResourceMark rm(THREAD);
4388 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4389 Exceptions::fthrow(
4390 THREAD_AND_LOCATION,
4391 vmSymbols::java_lang_ClassFormatError(),
4392 "Illegal field modifiers in class %s: 0x%X",
4393 _class_name->as_C_string(), flags);
4394 return;
4395 }
4396 }
4397
4398 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4399 bool is_interface,
4400 const Symbol* name,
4401 TRAPS) const {
4402 if (!_need_verify) { return; }
4403
4404 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4405 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4406 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4407 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4408 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4409 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4410 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4411 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4412 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4413 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4414 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4415 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4416 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4417 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4418
4419 bool is_illegal = false;
4420
4421 if (is_interface) {
4422 if (major_gte_8) {
4423 // Class file version is JAVA_8_VERSION or later Methods of
4424 // interfaces may set any of the flags except ACC_PROTECTED,
4425 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4426 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4427 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4428 (is_native || is_protected || is_final || is_synchronized) ||
4429 // If a specific method of a class or interface has its
4430 // ACC_ABSTRACT flag set, it must not have any of its
4431 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4432 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4433 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4434 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4435 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4436 is_illegal = true;
4437 }
4438 } else if (major_gte_1_5) {
4439 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4440 if (!is_public || is_private || is_protected || is_static || is_final ||
4441 is_synchronized || is_native || !is_abstract || is_strict) {
4442 is_illegal = true;
4443 }
4444 } else {
4445 // Class file version is pre-JAVA_1_5_VERSION
4446 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4447 is_illegal = true;
4448 }
4449 }
4450 } else { // not interface
4451 if (has_illegal_visibility(flags)) {
4452 is_illegal = true;
4453 } else {
4454 if (is_initializer) {
4455 if (is_static || is_final || is_synchronized || is_native ||
4456 is_abstract || (major_gte_1_5 && is_bridge)) {
4457 is_illegal = true;
4458 }
4459 } else { // not initializer
4460 if (is_abstract) {
4461 if ((is_final || is_native || is_private || is_static ||
4462 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4463 is_illegal = true;
4464 }
4465 }
4466 }
4467 }
4468 }
4469
4470 if (is_illegal) {
4471 ResourceMark rm(THREAD);
4472 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4473 Exceptions::fthrow(
4474 THREAD_AND_LOCATION,
4475 vmSymbols::java_lang_ClassFormatError(),
4476 "Method %s in class %s has illegal modifiers: 0x%X",
4477 name->as_C_string(), _class_name->as_C_string(), flags);
4478 return;
4479 }
4480 }
4481
4482 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4483 int length,
4484 TRAPS) const {
4485 assert(_need_verify, "only called when _need_verify is true");
4486 // Note: 0 <= length < 64K, as it comes from a u2 entry in the CP.
4487 if (!UTF8::is_legal_utf8(buffer, static_cast<size_t>(length), _major_version <= 47)) {
4488 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4489 }
4490 }
4491
4492 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4493 // In class names, '/' separates unqualified names. This is verified in this function also.
4494 // Method names also may not contain the characters '<' or '>', unless <init>
4495 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4496 // method. Because these names have been checked as special cases before
4497 // calling this method in verify_legal_method_name.
4498 //
4499 // This method is also called from the modular system APIs in modules.cpp
4500 // to verify the validity of module and package names.
4501 bool ClassFileParser::verify_unqualified_name(const char* name,
4502 unsigned int length,
4503 int type) {
4504 if (length == 0) return false; // Must have at least one char.
4505 for (const char* p = name; p != name + length; p++) {
4506 switch(*p) {
4507 case JVM_SIGNATURE_DOT:
4508 case JVM_SIGNATURE_ENDCLASS:
4509 case JVM_SIGNATURE_ARRAY:
4510 // do not permit '.', ';', or '['
4511 return false;
4512 case JVM_SIGNATURE_SLASH:
4513 // check for '//' or leading or trailing '/' which are not legal
4514 // unqualified name must not be empty
4515 if (type == ClassFileParser::LegalClass) {
4516 if (p == name || p+1 >= name+length ||
4517 *(p+1) == JVM_SIGNATURE_SLASH) {
4518 return false;
4519 }
4520 } else {
4521 return false; // do not permit '/' unless it's class name
4522 }
4523 break;
4524 case JVM_SIGNATURE_SPECIAL:
4525 case JVM_SIGNATURE_ENDSPECIAL:
4526 // do not permit '<' or '>' in method names
4527 if (type == ClassFileParser::LegalMethod) {
4528 return false;
4529 }
4530 }
4531 }
4532 return true;
4533 }
4534
4535 // Take pointer to a UTF8 byte string (not NUL-terminated).
4536 // Skip over the longest part of the string that could
4537 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
4538 // Return a pointer to just past the fieldname.
4539 // Return null if no fieldname at all was found, or in the case of slash_ok
4540 // being true, we saw consecutive slashes (meaning we were looking for a
4541 // qualified path but found something that was badly-formed).
4542 static const char* skip_over_field_name(const char* const name,
4543 bool slash_ok,
4544 unsigned int length) {
4545 const char* p;
4546 jboolean last_is_slash = false;
4547 jboolean not_first_ch = false;
4548
4549 for (p = name; p != name + length; not_first_ch = true) {
4550 const char* old_p = p;
4551 jchar ch = *p;
4552 if (ch < 128) {
4553 p++;
4554 // quick check for ascii
4555 if ((ch >= 'a' && ch <= 'z') ||
4556 (ch >= 'A' && ch <= 'Z') ||
4557 (ch == '_' || ch == '$') ||
4558 (not_first_ch && ch >= '0' && ch <= '9')) {
4559 last_is_slash = false;
4560 continue;
4561 }
4562 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
4563 if (last_is_slash) {
4564 return nullptr; // Don't permit consecutive slashes
4565 }
4566 last_is_slash = true;
4567 continue;
4568 }
4569 }
4570 else {
4571 jint unicode_ch;
4572 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4573 p = tmp_p;
4574 last_is_slash = false;
4575 // Check if ch is Java identifier start or is Java identifier part
4576 // 4672820: call java.lang.Character methods directly without generating separate tables.
4577 EXCEPTION_MARK;
4578 // return value
4579 JavaValue result(T_BOOLEAN);
4580 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
4581 JavaCallArguments args;
4582 args.push_int(unicode_ch);
4583
4584 if (not_first_ch) {
4585 // public static boolean isJavaIdentifierPart(char ch);
4586 JavaCalls::call_static(&result,
4587 vmClasses::Character_klass(),
4588 vmSymbols::isJavaIdentifierPart_name(),
4589 vmSymbols::int_bool_signature(),
4590 &args,
4591 THREAD);
4592 } else {
4593 // public static boolean isJavaIdentifierStart(char ch);
4594 JavaCalls::call_static(&result,
4595 vmClasses::Character_klass(),
4596 vmSymbols::isJavaIdentifierStart_name(),
4597 vmSymbols::int_bool_signature(),
4598 &args,
4599 THREAD);
4600 }
4601 if (HAS_PENDING_EXCEPTION) {
4602 CLEAR_PENDING_EXCEPTION;
4603 return nullptr;
4604 }
4605 if(result.get_jboolean()) {
4606 continue;
4607 }
4608 }
4609 return (not_first_ch) ? old_p : nullptr;
4610 }
4611 return (not_first_ch && !last_is_slash) ? p : nullptr;
4612 }
4613
4614 // Take pointer to a UTF8 byte string (not NUL-terminated).
4615 // Skip over the longest part of the string that could
4616 // be taken as a field signature. Allow "void" if void_ok.
4617 // Return a pointer to just past the signature.
4618 // Return null if no legal signature is found.
4619 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4620 bool void_ok,
4621 unsigned int length,
4622 TRAPS) const {
4623 unsigned int array_dim = 0;
4624 while (length > 0) {
4625 switch (signature[0]) {
4626 case JVM_SIGNATURE_VOID: if (!void_ok) { return nullptr; }
4627 case JVM_SIGNATURE_BOOLEAN:
4628 case JVM_SIGNATURE_BYTE:
4629 case JVM_SIGNATURE_CHAR:
4630 case JVM_SIGNATURE_SHORT:
4631 case JVM_SIGNATURE_INT:
4632 case JVM_SIGNATURE_FLOAT:
4633 case JVM_SIGNATURE_LONG:
4634 case JVM_SIGNATURE_DOUBLE:
4635 return signature + 1;
4636 case JVM_SIGNATURE_CLASS: {
4637 if (_major_version < JAVA_1_5_VERSION) {
4638 // Skip over the class name if one is there
4639 const char* const p = skip_over_field_name(signature + 1, true, --length);
4640
4641 // The next character better be a semicolon
4642 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
4643 return p + 1;
4644 }
4645 }
4646 else {
4647 // Skip leading 'L' and ignore first appearance of ';'
4648 signature++;
4649 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4650 // Format check signature
4651 if (c != nullptr) {
4652 int newlen = pointer_delta_as_int(c, (char*) signature);
4653 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4654 if (!legal) {
4655 classfile_parse_error("Class name is empty or contains illegal character "
4656 "in descriptor in class file %s",
4657 THREAD);
4658 return nullptr;
4659 }
4660 return signature + newlen + 1;
4661 }
4662 }
4663 return nullptr;
4664 }
4665 case JVM_SIGNATURE_ARRAY:
4666 array_dim++;
4667 if (array_dim > 255) {
4668 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4669 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
4670 return nullptr;
4671 }
4672 // The rest of what's there better be a legal signature
4673 signature++;
4674 length--;
4675 void_ok = false;
4676 break;
4677 default:
4678 return nullptr;
4679 }
4680 }
4681 return nullptr;
4682 }
4683
4684 // Checks if name is a legal class name.
4685 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4686 if (!_need_verify) { return; }
4687
4688 assert(name->refcount() > 0, "symbol must be kept alive");
4689 char* bytes = (char*)name->bytes();
4690 unsigned int length = name->utf8_length();
4691 bool legal = false;
4692
4693 if (length > 0) {
4694 const char* p;
4695 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4696 p = skip_over_field_signature(bytes, false, length, CHECK);
4697 legal = (p != nullptr) && ((p - bytes) == (int)length);
4698 } else if (_major_version < JAVA_1_5_VERSION) {
4699 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4700 p = skip_over_field_name(bytes, true, length);
4701 legal = (p != nullptr) && ((p - bytes) == (int)length);
4702 }
4703 } else {
4704 // 4900761: relax the constraints based on JSR202 spec
4705 // Class names may be drawn from the entire Unicode character set.
4706 // Identifiers between '/' must be unqualified names.
4707 // The utf8 string has been verified when parsing cpool entries.
4708 legal = verify_unqualified_name(bytes, length, LegalClass);
4709 }
4710 }
4711 if (!legal) {
4712 ResourceMark rm(THREAD);
4713 assert(_class_name != nullptr, "invariant");
4714 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4715 Exceptions::fthrow(
4716 THREAD_AND_LOCATION,
4717 vmSymbols::java_lang_ClassFormatError(),
4718 "Illegal class name \"%.*s\" in class file %s", length, bytes,
4719 _class_name->as_C_string()
4720 );
4721 return;
4722 }
4723 }
4724
4725 // Checks if name is a legal field name.
4726 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4727 if (!_need_verify) { return; }
4728
4729 char* bytes = (char*)name->bytes();
4730 unsigned int length = name->utf8_length();
4731 bool legal = false;
4732
4733 if (length > 0) {
4734 if (_major_version < JAVA_1_5_VERSION) {
4735 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4736 const char* p = skip_over_field_name(bytes, false, length);
4737 legal = (p != nullptr) && ((p - bytes) == (int)length);
4738 }
4739 } else {
4740 // 4881221: relax the constraints based on JSR202 spec
4741 legal = verify_unqualified_name(bytes, length, LegalField);
4742 }
4743 }
4744
4745 if (!legal) {
4746 ResourceMark rm(THREAD);
4747 assert(_class_name != nullptr, "invariant");
4748 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4749 Exceptions::fthrow(
4750 THREAD_AND_LOCATION,
4751 vmSymbols::java_lang_ClassFormatError(),
4752 "Illegal field name \"%.*s\" in class %s", length, bytes,
4753 _class_name->as_C_string()
4754 );
4755 return;
4756 }
4757 }
4758
4759 // Checks if name is a legal method name.
4760 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4761 if (!_need_verify) { return; }
4762
4763 assert(name != nullptr, "method name is null");
4764 char* bytes = (char*)name->bytes();
4765 unsigned int length = name->utf8_length();
4766 bool legal = false;
4767
4768 if (length > 0) {
4769 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
4770 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4771 legal = true;
4772 }
4773 } else if (_major_version < JAVA_1_5_VERSION) {
4774 const char* p;
4775 p = skip_over_field_name(bytes, false, length);
4776 legal = (p != nullptr) && ((p - bytes) == (int)length);
4777 } else {
4778 // 4881221: relax the constraints based on JSR202 spec
4779 legal = verify_unqualified_name(bytes, length, LegalMethod);
4780 }
4781 }
4782
4783 if (!legal) {
4784 ResourceMark rm(THREAD);
4785 assert(_class_name != nullptr, "invariant");
4786 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4787 Exceptions::fthrow(
4788 THREAD_AND_LOCATION,
4789 vmSymbols::java_lang_ClassFormatError(),
4790 "Illegal method name \"%.*s\" in class %s", length, bytes,
4791 _class_name->as_C_string()
4792 );
4793 return;
4794 }
4795 }
4796
4797
4798 // Checks if signature is a legal field signature.
4799 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
4800 const Symbol* signature,
4801 TRAPS) const {
4802 if (!_need_verify) { return; }
4803
4804 const char* const bytes = (const char*)signature->bytes();
4805 const unsigned int length = signature->utf8_length();
4806 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
4807
4808 if (p == nullptr || (p - bytes) != (int)length) {
4809 throwIllegalSignature("Field", name, signature, CHECK);
4810 }
4811 }
4812
4813 // Check that the signature is compatible with the method name. For example,
4814 // check that <init> has a void signature.
4815 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
4816 const Symbol* signature,
4817 TRAPS) const {
4818 if (!_need_verify) {
4819 return;
4820 }
4821
4822 // Class initializers cannot have args for class format version >= 51.
4823 if (name == vmSymbols::class_initializer_name() &&
4824 signature != vmSymbols::void_method_signature() &&
4825 _major_version >= JAVA_7_VERSION) {
4826 throwIllegalSignature("Method", name, signature, THREAD);
4827 return;
4828 }
4829
4830 int sig_length = signature->utf8_length();
4831 if (name->utf8_length() > 0 &&
4832 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
4833 sig_length > 0 &&
4834 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
4835 throwIllegalSignature("Method", name, signature, THREAD);
4836 }
4837 }
4838
4839 // Checks if signature is a legal method signature.
4840 // Returns number of parameters
4841 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
4842 const Symbol* signature,
4843 TRAPS) const {
4844 if (!_need_verify) {
4845 // make sure caller's args_size will be less than 0 even for non-static
4846 // method so it will be recomputed in compute_size_of_parameters().
4847 return -2;
4848 }
4849
4850 unsigned int args_size = 0;
4851 const char* p = (const char*)signature->bytes();
4852 unsigned int length = signature->utf8_length();
4853 const char* nextp;
4854
4855 // The first character must be a '('
4856 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4857 length--;
4858 // Skip over legal field signatures
4859 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4860 while ((length > 0) && (nextp != nullptr)) {
4861 args_size++;
4862 if (p[0] == 'J' || p[0] == 'D') {
4863 args_size++;
4864 }
4865 length -= pointer_delta_as_int(nextp, p);
4866 p = nextp;
4867 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4868 }
4869 // The first non-signature thing better be a ')'
4870 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4871 length--;
4872 // Now we better just have a return value
4873 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4874 if (nextp && ((int)length == (nextp - p))) {
4875 return args_size;
4876 }
4877 }
4878 }
4879 // Report error
4880 throwIllegalSignature("Method", name, signature, THREAD);
4881 return 0;
4882 }
4883
4884 int ClassFileParser::static_field_size() const {
4885 assert(_field_info != nullptr, "invariant");
4886 return _field_info->_static_field_size;
4887 }
4888
4889 int ClassFileParser::total_oop_map_count() const {
4890 assert(_field_info != nullptr, "invariant");
4891 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
4892 }
4893
4894 jint ClassFileParser::layout_size() const {
4895 assert(_field_info != nullptr, "invariant");
4896 return _field_info->_instance_size;
4897 }
4898
4899 int ClassFileParser::hash_offset() const {
4900 return _field_info->_hash_offset;
4901 }
4902
4903 static void check_methods_for_intrinsics(const InstanceKlass* ik,
4904 const Array<Method*>* methods) {
4905 assert(ik != nullptr, "invariant");
4906 assert(methods != nullptr, "invariant");
4907
4908 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4909 // (We used to do this lazily, but now we query it in Rewriter,
4910 // which is eagerly done for every method, so we might as well do it now,
4911 // when everything is fresh in memory.)
4912 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
4913
4914 if (klass_id != vmSymbolID::NO_SID) {
4915 for (int j = 0; j < methods->length(); ++j) {
4916 Method* method = methods->at(j);
4917 method->init_intrinsic_id(klass_id);
4918
4919 if (CheckIntrinsics) {
4920 // Check if an intrinsic is defined for method 'method',
4921 // but the method is not annotated with @IntrinsicCandidate.
4922 if (method->intrinsic_id() != vmIntrinsics::_none &&
4923 !method->intrinsic_candidate()) {
4924 tty->print("Compiler intrinsic is defined for method [%s], "
4925 "but the method is not annotated with @IntrinsicCandidate.%s",
4926 method->name_and_sig_as_C_string(),
4927 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
4928 );
4929 tty->cr();
4930 DEBUG_ONLY(vm_exit(1));
4931 }
4932 // Check is the method 'method' is annotated with @IntrinsicCandidate,
4933 // but there is no intrinsic available for it.
4934 if (method->intrinsic_candidate() &&
4935 method->intrinsic_id() == vmIntrinsics::_none) {
4936 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
4937 "but no compiler intrinsic is defined for the method.%s",
4938 method->name_and_sig_as_C_string(),
4939 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4940 );
4941 tty->cr();
4942 DEBUG_ONLY(vm_exit(1));
4943 }
4944 }
4945 } // end for
4946
4947 #ifdef ASSERT
4948 if (CheckIntrinsics) {
4949 // Check for orphan methods in the current class. A method m
4950 // of a class C is orphan if an intrinsic is defined for method m,
4951 // but class C does not declare m.
4952 // The check is potentially expensive, therefore it is available
4953 // only in debug builds.
4954
4955 for (auto id : EnumRange<vmIntrinsicID>{}) {
4956 if (vmIntrinsics::_compiledLambdaForm == id) {
4957 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
4958 // generated for the JVM from a LambdaForm and therefore no method
4959 // is defined for it.
4960 continue;
4961 }
4962 if (vmIntrinsics::_blackhole == id) {
4963 // The _blackhole intrinsic is a special marker. No explicit method
4964 // is defined for it.
4965 continue;
4966 }
4967
4968 if (vmIntrinsics::class_for(id) == klass_id) {
4969 // Check if the current class contains a method with the same
4970 // name, flags, signature.
4971 bool match = false;
4972 for (int j = 0; j < methods->length(); ++j) {
4973 const Method* method = methods->at(j);
4974 if (method->intrinsic_id() == id) {
4975 match = true;
4976 break;
4977 }
4978 }
4979
4980 if (!match) {
4981 char buf[1000];
4982 tty->print("Compiler intrinsic is defined for method [%s], "
4983 "but the method is not available in class [%s].%s",
4984 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
4985 ik->name()->as_C_string(),
4986 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4987 );
4988 tty->cr();
4989 DEBUG_ONLY(vm_exit(1));
4990 }
4991 }
4992 } // end for
4993 } // CheckIntrinsics
4994 #endif // ASSERT
4995 }
4996 }
4997
4998 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
4999 const ClassInstanceInfo& cl_inst_info,
5000 TRAPS) {
5001 if (_klass != nullptr) {
5002 return _klass;
5003 }
5004
5005 InstanceKlass* const ik =
5006 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5007
5008 if (is_hidden()) {
5009 mangle_hidden_class_name(ik);
5010 }
5011
5012 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5013
5014 assert(_klass == ik, "invariant");
5015
5016 return ik;
5017 }
5018
5019 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5020 bool changed_by_loadhook,
5021 const ClassInstanceInfo& cl_inst_info,
5022 TRAPS) {
5023 assert(ik != nullptr, "invariant");
5024
5025 // Set name and CLD before adding to CLD
5026 ik->set_class_loader_data(_loader_data);
5027 ik->set_name(_class_name);
5028
5029 // Add all classes to our internal class loader list here,
5030 // including classes in the bootstrap (null) class loader.
5031 const bool publicize = !is_internal();
5032
5033 _loader_data->add_class(ik, publicize);
5034
5035 set_klass_to_deallocate(ik);
5036
5037 assert(_field_info != nullptr, "invariant");
5038 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5039 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5040 "sanity");
5041
5042 assert(ik->is_instance_klass(), "sanity");
5043 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5044
5045 // Fill in information already parsed
5046 ik->set_should_verify_class(_need_verify);
5047
5048 // Not yet: supers are done below to support the new subtype-checking fields
5049 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5050 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5051 ik->set_static_oop_field_count(_static_oop_count);
5052
5053 // this transfers ownership of a lot of arrays from
5054 // the parser onto the InstanceKlass*
5055 apply_parsed_class_metadata(ik, _java_fields_count);
5056
5057 // can only set dynamic nest-host after static nest information is set
5058 if (cl_inst_info.dynamic_nest_host() != nullptr) {
5059 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5060 }
5061
5062 // note that is not safe to use the fields in the parser from this point on
5063 assert(nullptr == _cp, "invariant");
5064 assert(nullptr == _fieldinfo_stream, "invariant");
5065 assert(nullptr == _fields_status, "invariant");
5066 assert(nullptr == _methods, "invariant");
5067 assert(nullptr == _inner_classes, "invariant");
5068 assert(nullptr == _nest_members, "invariant");
5069 assert(nullptr == _combined_annotations, "invariant");
5070 assert(nullptr == _record_components, "invariant");
5071 assert(nullptr == _permitted_subclasses, "invariant");
5072
5073 if (_has_localvariable_table) {
5074 ik->set_has_localvariable_table(true);
5075 }
5076
5077 if (_has_final_method) {
5078 ik->set_has_final_method();
5079 }
5080
5081 ik->copy_method_ordering(_method_ordering, CHECK);
5082 // The InstanceKlass::_methods_jmethod_ids cache
5083 // is managed on the assumption that the initial cache
5084 // size is equal to the number of methods in the class. If
5085 // that changes, then InstanceKlass::idnum_can_increment()
5086 // has to be changed accordingly.
5087 ik->set_initial_method_idnum(checked_cast<u2>(ik->methods()->length()));
5088
5089 ik->set_this_class_index(_this_class_index);
5090
5091 if (_is_hidden) {
5092 // _this_class_index is a CONSTANT_Class entry that refers to this
5093 // hidden class itself. If this class needs to refer to its own methods
5094 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5095 // _this_class_index. However, because this class is hidden (it's
5096 // not stored in SystemDictionary), _this_class_index cannot be resolved
5097 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5098 // Therefore, we must eagerly resolve _this_class_index now.
5099 ik->constants()->klass_at_put(_this_class_index, ik);
5100 }
5101
5102 ik->set_minor_version(_minor_version);
5103 ik->set_major_version(_major_version);
5104 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5105 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5106
5107 assert(!_is_hidden || ik->is_hidden(), "must be set already");
5108
5109 // Set PackageEntry for this_klass
5110 oop cl = ik->class_loader();
5111 Handle clh = Handle(THREAD, cl);
5112 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5113 ik->set_package(cld, nullptr, CHECK);
5114
5115 const Array<Method*>* const methods = ik->methods();
5116 assert(methods != nullptr, "invariant");
5117 const int methods_len = methods->length();
5118
5119 check_methods_for_intrinsics(ik, methods);
5120
5121 // Fill in field values obtained by parse_classfile_attributes
5122 if (_parsed_annotations->has_any_annotations()) {
5123 _parsed_annotations->apply_to(ik);
5124 }
5125
5126 apply_parsed_class_attributes(ik);
5127
5128 // Miranda methods
5129 if ((_num_miranda_methods > 0) ||
5130 // if this class introduced new miranda methods or
5131 (_super_klass != nullptr && _super_klass->has_miranda_methods())
5132 // super class exists and this class inherited miranda methods
5133 ) {
5134 ik->set_has_miranda_methods(); // then set a flag
5135 }
5136
5137 // Fill in information needed to compute superclasses.
5138 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5139 ik->set_transitive_interfaces(_transitive_interfaces);
5140 ik->set_local_interfaces(_local_interfaces);
5141 _transitive_interfaces = nullptr;
5142 _local_interfaces = nullptr;
5143
5144 // Initialize itable offset tables
5145 klassItable::setup_itable_offset_table(ik);
5146
5147 // Compute transitive closure of interfaces this class implements
5148 // Do final class setup
5149 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5150 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5151 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5152 }
5153
5154 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5155 ( _super_klass != nullptr && _super_klass->has_contended_annotations())) {
5156 ik->set_has_contended_annotations(true);
5157 }
5158
5159 // Fill in has_finalizer and layout_helper
5160 set_precomputed_flags(ik);
5161
5162 // check if this class can access its super class
5163 check_super_class_access(ik, CHECK);
5164
5165 // check if this class can access its superinterfaces
5166 check_super_interface_access(ik, CHECK);
5167
5168 // check if this class overrides any final method
5169 check_final_method_override(ik, CHECK);
5170
5171 // reject static interface methods prior to Java 8
5172 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5173 check_illegal_static_method(ik, CHECK);
5174 }
5175
5176 // Obtain this_klass' module entry
5177 ModuleEntry* module_entry = ik->module();
5178 assert(module_entry != nullptr, "module_entry should always be set");
5179
5180 // Obtain java.lang.Module
5181 Handle module_handle(THREAD, module_entry->module());
5182
5183 // Allocate mirror and initialize static fields
5184 java_lang_Class::create_mirror(ik,
5185 Handle(THREAD, _loader_data->class_loader()),
5186 module_handle,
5187 _protection_domain,
5188 cl_inst_info.class_data(),
5189 CHECK);
5190
5191 assert(_all_mirandas != nullptr, "invariant");
5192
5193 // Generate any default methods - default methods are public interface methods
5194 // that have a default implementation. This is new with Java 8.
5195 if (_has_nonstatic_concrete_methods) {
5196 DefaultMethods::generate_default_methods(ik,
5197 _all_mirandas,
5198 CHECK);
5199 }
5200
5201 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5202 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5203 !module_entry->has_default_read_edges()) {
5204 if (!module_entry->set_has_default_read_edges()) {
5205 // We won a potential race
5206 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5207 }
5208 }
5209
5210 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5211
5212 if (!is_internal()) {
5213 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5214
5215 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5216 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5217 log_is_enabled(Info, class, preview)) {
5218 ResourceMark rm;
5219 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5220 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5221 }
5222
5223 if (log_is_enabled(Debug, class, resolve)) {
5224 ResourceMark rm;
5225 // print out the superclass.
5226 const char * from = ik->external_name();
5227 if (ik->java_super() != nullptr) {
5228 log_debug(class, resolve)("%s %s (super)",
5229 from,
5230 ik->java_super()->external_name());
5231 }
5232 // print out each of the interface classes referred to by this class.
5233 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5234 if (local_interfaces != nullptr) {
5235 const int length = local_interfaces->length();
5236 for (int i = 0; i < length; i++) {
5237 const InstanceKlass* const k = local_interfaces->at(i);
5238 const char * to = k->external_name();
5239 log_debug(class, resolve)("%s %s (interface)", from, to);
5240 }
5241 }
5242 }
5243 }
5244
5245 JFR_ONLY(INIT_ID(ik);)
5246
5247 // If we reach here, all is well.
5248 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5249 // in order for it to not be destroyed in the ClassFileParser destructor.
5250 set_klass_to_deallocate(nullptr);
5251
5252 // it's official
5253 set_klass(ik);
5254
5255 debug_only(ik->verify();)
5256 }
5257
5258 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5259 // Decrement the refcount in the old name, since we're clobbering it.
5260 _class_name->decrement_refcount();
5261
5262 _class_name = new_class_name;
5263 // Increment the refcount of the new name.
5264 // Now the ClassFileParser owns this name and will decrement in
5265 // the destructor.
5266 _class_name->increment_refcount();
5267 }
5268
5269 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5270 Symbol* name,
5271 ClassLoaderData* loader_data,
5272 const ClassLoadInfo* cl_info,
5273 Publicity pub_level,
5274 TRAPS) :
5275 _stream(stream),
5276 _class_name(nullptr),
5277 _loader_data(loader_data),
5278 _is_hidden(cl_info->is_hidden()),
5279 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5280 _orig_cp_size(0),
5281 _static_oop_count(0),
5282 _super_klass(),
5283 _cp(nullptr),
5284 _fieldinfo_stream(nullptr),
5285 _fields_status(nullptr),
5286 _methods(nullptr),
5287 _inner_classes(nullptr),
5288 _nest_members(nullptr),
5289 _nest_host(0),
5290 _permitted_subclasses(nullptr),
5291 _record_components(nullptr),
5292 _local_interfaces(nullptr),
5293 _transitive_interfaces(nullptr),
5294 _combined_annotations(nullptr),
5295 _class_annotations(nullptr),
5296 _class_type_annotations(nullptr),
5297 _fields_annotations(nullptr),
5298 _fields_type_annotations(nullptr),
5299 _klass(nullptr),
5300 _klass_to_deallocate(nullptr),
5301 _parsed_annotations(nullptr),
5302 _field_info(nullptr),
5303 _temp_field_info(nullptr),
5304 _method_ordering(nullptr),
5305 _all_mirandas(nullptr),
5306 _vtable_size(0),
5307 _itable_size(0),
5308 _num_miranda_methods(0),
5309 _protection_domain(cl_info->protection_domain()),
5310 _access_flags(),
5311 _pub_level(pub_level),
5312 _bad_constant_seen(0),
5313 _synthetic_flag(false),
5314 _sde_length(false),
5315 _sde_buffer(nullptr),
5316 _sourcefile_index(0),
5317 _generic_signature_index(0),
5318 _major_version(0),
5319 _minor_version(0),
5320 _this_class_index(0),
5321 _super_class_index(0),
5322 _itfs_len(0),
5323 _java_fields_count(0),
5324 _need_verify(false),
5325 _has_nonstatic_concrete_methods(false),
5326 _declares_nonstatic_concrete_methods(false),
5327 _has_localvariable_table(false),
5328 _has_final_method(false),
5329 _has_contended_fields(false),
5330 _has_finalizer(false),
5331 _has_empty_finalizer(false),
5332 _max_bootstrap_specifier_index(-1) {
5333
5334 _class_name = name != nullptr ? name : vmSymbols::unknown_class_name();
5335 _class_name->increment_refcount();
5336
5337 assert(_loader_data != nullptr, "invariant");
5338 assert(stream != nullptr, "invariant");
5339 assert(_stream != nullptr, "invariant");
5340 assert(_stream->buffer() == _stream->current(), "invariant");
5341 assert(_class_name != nullptr, "invariant");
5342 assert(0 == _access_flags.as_unsigned_short(), "invariant");
5343
5344 // Figure out whether we can skip format checking (matching classic VM behavior)
5345 _need_verify = Verifier::should_verify_for(_loader_data->class_loader());
5346
5347 // synch back verification state to stream to check for truncation.
5348 stream->set_need_verify(_need_verify);
5349
5350 parse_stream(stream, CHECK);
5351
5352 post_process_parsed_stream(stream, _cp, CHECK);
5353 }
5354
5355 void ClassFileParser::clear_class_metadata() {
5356 // metadata created before the instance klass is created. Must be
5357 // deallocated if classfile parsing returns an error.
5358 _cp = nullptr;
5359 _fieldinfo_stream = nullptr;
5360 _fields_status = nullptr;
5361 _methods = nullptr;
5362 _inner_classes = nullptr;
5363 _nest_members = nullptr;
5364 _permitted_subclasses = nullptr;
5365 _combined_annotations = nullptr;
5366 _class_annotations = _class_type_annotations = nullptr;
5367 _fields_annotations = _fields_type_annotations = nullptr;
5368 _record_components = nullptr;
5369 }
5370
5371 // Destructor to clean up
5372 ClassFileParser::~ClassFileParser() {
5373 _class_name->decrement_refcount();
5374
5375 if (_cp != nullptr) {
5376 MetadataFactory::free_metadata(_loader_data, _cp);
5377 }
5378
5379 if (_fieldinfo_stream != nullptr) {
5380 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_stream);
5381 }
5382
5383 if (_fields_status != nullptr) {
5384 MetadataFactory::free_array<FieldStatus>(_loader_data, _fields_status);
5385 }
5386
5387 if (_methods != nullptr) {
5388 // Free methods
5389 InstanceKlass::deallocate_methods(_loader_data, _methods);
5390 }
5391
5392 // beware of the Universe::empty_blah_array!!
5393 if (_inner_classes != nullptr && _inner_classes != Universe::the_empty_short_array()) {
5394 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5395 }
5396
5397 if (_nest_members != nullptr && _nest_members != Universe::the_empty_short_array()) {
5398 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5399 }
5400
5401 if (_record_components != nullptr) {
5402 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5403 }
5404
5405 if (_permitted_subclasses != nullptr && _permitted_subclasses != Universe::the_empty_short_array()) {
5406 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5407 }
5408
5409 // Free interfaces
5410 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5411 _local_interfaces, _transitive_interfaces);
5412
5413 if (_combined_annotations != nullptr) {
5414 // After all annotations arrays have been created, they are installed into the
5415 // Annotations object that will be assigned to the InstanceKlass being created.
5416
5417 // Deallocate the Annotations object and the installed annotations arrays.
5418 _combined_annotations->deallocate_contents(_loader_data);
5419
5420 // If the _combined_annotations pointer is non-null,
5421 // then the other annotations fields should have been cleared.
5422 assert(_class_annotations == nullptr, "Should have been cleared");
5423 assert(_class_type_annotations == nullptr, "Should have been cleared");
5424 assert(_fields_annotations == nullptr, "Should have been cleared");
5425 assert(_fields_type_annotations == nullptr, "Should have been cleared");
5426 } else {
5427 // If the annotations arrays were not installed into the Annotations object,
5428 // then they have to be deallocated explicitly.
5429 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5430 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5431 Annotations::free_contents(_loader_data, _fields_annotations);
5432 Annotations::free_contents(_loader_data, _fields_type_annotations);
5433 }
5434
5435 clear_class_metadata();
5436 _transitive_interfaces = nullptr;
5437 _local_interfaces = nullptr;
5438
5439 // deallocate the klass if already created. Don't directly deallocate, but add
5440 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5441 // at a safepoint.
5442 if (_klass_to_deallocate != nullptr) {
5443 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5444 }
5445 }
5446
5447 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5448 TRAPS) {
5449
5450 assert(stream != nullptr, "invariant");
5451 assert(_class_name != nullptr, "invariant");
5452
5453 // BEGIN STREAM PARSING
5454 stream->guarantee_more(8, CHECK); // magic, major, minor
5455 // Magic value
5456 const u4 magic = stream->get_u4_fast();
5457 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5458 "Incompatible magic value %u in class file %s",
5459 magic, CHECK);
5460
5461 // Version numbers
5462 _minor_version = stream->get_u2_fast();
5463 _major_version = stream->get_u2_fast();
5464
5465 // Check version numbers - we check this even with verifier off
5466 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5467
5468 stream->guarantee_more(3, CHECK); // length, first cp tag
5469 u2 cp_size = stream->get_u2_fast();
5470
5471 guarantee_property(
5472 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5473 cp_size, CHECK);
5474
5475 _orig_cp_size = cp_size;
5476 if (is_hidden()) { // Add a slot for hidden class name.
5477 cp_size++;
5478 }
5479
5480 _cp = ConstantPool::allocate(_loader_data,
5481 cp_size,
5482 CHECK);
5483
5484 ConstantPool* const cp = _cp;
5485
5486 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
5487
5488 assert(cp_size == (u2)cp->length(), "invariant");
5489
5490 // ACCESS FLAGS
5491 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5492
5493 // Access flags
5494 u2 flags;
5495 // JVM_ACC_MODULE is defined in JDK-9 and later.
5496 if (_major_version >= JAVA_9_VERSION) {
5497 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5498 } else {
5499 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5500 }
5501
5502 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5503 // Set abstract bit for old class files for backward compatibility
5504 flags |= JVM_ACC_ABSTRACT;
5505 }
5506
5507 verify_legal_class_modifiers(flags, CHECK);
5508
5509 short bad_constant = class_bad_constant_seen();
5510 if (bad_constant != 0) {
5511 // Do not throw CFE until after the access_flags are checked because if
5512 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5513 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5514 return;
5515 }
5516
5517 _access_flags.set_flags(flags);
5518
5519 // This class and superclass
5520 _this_class_index = stream->get_u2_fast();
5521 guarantee_property(
5522 valid_cp_range(_this_class_index, cp_size) &&
5523 cp->tag_at(_this_class_index).is_unresolved_klass(),
5524 "Invalid this class index %u in constant pool in class file %s",
5525 _this_class_index, CHECK);
5526
5527 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5528 assert(class_name_in_cp != nullptr, "class_name can't be null");
5529
5530 // Don't need to check whether this class name is legal or not.
5531 // It has been checked when constant pool is parsed.
5532 // However, make sure it is not an array type.
5533 if (_need_verify) {
5534 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
5535 "Bad class name in class file %s",
5536 CHECK);
5537 }
5538
5539 #ifdef ASSERT
5540 // Basic sanity checks
5541 if (_is_hidden) {
5542 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
5543 }
5544 #endif
5545
5546 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
5547
5548 if (_is_hidden) {
5549 assert(_class_name != nullptr, "Unexpected null _class_name");
5550 #ifdef ASSERT
5551 if (_need_verify) {
5552 verify_legal_class_name(_class_name, CHECK);
5553 }
5554 #endif
5555
5556 } else {
5557 // Check if name in class file matches given name
5558 if (_class_name != class_name_in_cp) {
5559 if (_class_name != vmSymbols::unknown_class_name()) {
5560 ResourceMark rm(THREAD);
5561 // Names are all known to be < 64k so we know this formatted message is not excessively large.
5562 Exceptions::fthrow(THREAD_AND_LOCATION,
5563 vmSymbols::java_lang_NoClassDefFoundError(),
5564 "%s (wrong name: %s)",
5565 _class_name->as_C_string(),
5566 class_name_in_cp->as_C_string()
5567 );
5568 return;
5569 } else {
5570 // The class name was not known by the caller so we set it from
5571 // the value in the CP.
5572 update_class_name(class_name_in_cp);
5573 }
5574 // else nothing to do: the expected class name matches what is in the CP
5575 }
5576 }
5577
5578 // Verification prevents us from creating names with dots in them, this
5579 // asserts that that's the case.
5580 assert(is_internal_format(_class_name), "external class name format used internally");
5581
5582 if (!is_internal()) {
5583 LogTarget(Debug, class, preorder) lt;
5584 if (lt.is_enabled()){
5585 ResourceMark rm(THREAD);
5586 LogStream ls(lt);
5587 ls.print("%s", _class_name->as_klass_external_name());
5588 if (stream->source() != nullptr) {
5589 ls.print(" source: %s", stream->source());
5590 }
5591 ls.cr();
5592 }
5593 }
5594
5595 // SUPERKLASS
5596 _super_class_index = stream->get_u2_fast();
5597 _super_klass = parse_super_class(cp,
5598 _super_class_index,
5599 _need_verify,
5600 CHECK);
5601
5602 // Interfaces
5603 _itfs_len = stream->get_u2_fast();
5604 parse_interfaces(stream,
5605 _itfs_len,
5606 cp,
5607 &_has_nonstatic_concrete_methods,
5608 CHECK);
5609
5610 assert(_local_interfaces != nullptr, "invariant");
5611
5612 // Fields (offsets are filled in later)
5613 parse_fields(stream,
5614 _access_flags.is_interface(),
5615 cp,
5616 cp_size,
5617 &_java_fields_count,
5618 CHECK);
5619
5620 assert(_temp_field_info != nullptr, "invariant");
5621
5622 // Methods
5623 parse_methods(stream,
5624 _access_flags.is_interface(),
5625 &_has_localvariable_table,
5626 &_has_final_method,
5627 &_declares_nonstatic_concrete_methods,
5628 CHECK);
5629
5630 assert(_methods != nullptr, "invariant");
5631
5632 if (_declares_nonstatic_concrete_methods) {
5633 _has_nonstatic_concrete_methods = true;
5634 }
5635
5636 // Additional attributes/annotations
5637 _parsed_annotations = new ClassAnnotationCollector();
5638 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5639
5640 assert(_inner_classes != nullptr, "invariant");
5641
5642 // Finalize the Annotations metadata object,
5643 // now that all annotation arrays have been created.
5644 create_combined_annotations(CHECK);
5645
5646 // Make sure this is the end of class file stream
5647 guarantee_property(stream->at_eos(),
5648 "Extra bytes at the end of class file %s",
5649 CHECK);
5650
5651 // all bytes in stream read and parsed
5652 }
5653
5654 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
5655 ResourceMark rm;
5656 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
5657 // use a '/' because that confuses finding the class's package. Also, can't
5658 // use an illegal char such as ';' because that causes serialization issues
5659 // and issues with hidden classes that create their own hidden classes.
5660 char addr_buf[20];
5661 if (CDSConfig::is_dumping_static_archive()) {
5662 // We want stable names for the archived hidden classes (only for static
5663 // archive for now). Spaces under default_SharedBaseAddress() will be
5664 // occupied by the archive at run time, so we know that no dynamically
5665 // loaded InstanceKlass will be placed under there.
5666 static volatile size_t counter = 0;
5667 Atomic::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
5668 size_t new_id = Atomic::add(&counter, (size_t)1);
5669 jio_snprintf(addr_buf, 20, "0x%zx", new_id);
5670 } else {
5671 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
5672 }
5673 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
5674 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
5675 jio_snprintf(new_name, new_name_len, "%s+%s",
5676 _class_name->as_C_string(), addr_buf);
5677 update_class_name(SymbolTable::new_symbol(new_name));
5678
5679 // Add a Utf8 entry containing the hidden name.
5680 assert(_class_name != nullptr, "Unexpected null _class_name");
5681 int hidden_index = _orig_cp_size; // this is an extra slot we added
5682 _cp->symbol_at_put(hidden_index, _class_name);
5683
5684 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
5685 // We have to update the resolved_klass_index and the name_index together
5686 // so extract the existing resolved_klass_index first.
5687 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
5688 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
5689 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
5690 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
5691 "Bad name_index");
5692 }
5693
5694 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5695 ConstantPool* cp,
5696 TRAPS) {
5697 assert(stream != nullptr, "invariant");
5698 assert(stream->at_eos(), "invariant");
5699 assert(cp != nullptr, "invariant");
5700 assert(_loader_data != nullptr, "invariant");
5701
5702 if (_class_name == vmSymbols::java_lang_Object()) {
5703 guarantee_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
5704 "java.lang.Object cannot implement an interface in class file %s",
5705 CHECK);
5706 }
5707 // We check super class after class file is parsed and format is checked
5708 if (_super_class_index > 0 && nullptr == _super_klass) {
5709 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5710 if (_access_flags.is_interface()) {
5711 // Before attempting to resolve the superclass, check for class format
5712 // errors not checked yet.
5713 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5714 "Interfaces must have java.lang.Object as superclass in class file %s",
5715 CHECK);
5716 }
5717 Handle loader(THREAD, _loader_data->class_loader());
5718 if (loader.is_null() && super_class_name == vmSymbols::java_lang_Object()) {
5719 _super_klass = vmClasses::Object_klass();
5720 } else {
5721 _super_klass = (const InstanceKlass*)
5722 SystemDictionary::resolve_super_or_fail(_class_name,
5723 super_class_name,
5724 loader,
5725 true,
5726 CHECK);
5727 }
5728 }
5729
5730 if (_super_klass != nullptr) {
5731 if (_super_klass->has_nonstatic_concrete_methods()) {
5732 _has_nonstatic_concrete_methods = true;
5733 }
5734
5735 if (_super_klass->is_interface()) {
5736 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
5737 return;
5738 }
5739 }
5740
5741 // Compute the transitive list of all unique interfaces implemented by this class
5742 _transitive_interfaces =
5743 compute_transitive_interfaces(_super_klass,
5744 _local_interfaces,
5745 _loader_data,
5746 CHECK);
5747
5748 assert(_transitive_interfaces != nullptr, "invariant");
5749
5750 // sort methods
5751 _method_ordering = sort_methods(_methods);
5752
5753 _all_mirandas = new GrowableArray<Method*>(20);
5754
5755 Handle loader(THREAD, _loader_data->class_loader());
5756 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5757 &_num_miranda_methods,
5758 _all_mirandas,
5759 _super_klass,
5760 _methods,
5761 _access_flags,
5762 _major_version,
5763 loader,
5764 _class_name,
5765 _local_interfaces);
5766
5767 // Size of Java itable (in words)
5768 _itable_size = _access_flags.is_interface() ? 0 :
5769 klassItable::compute_itable_size(_transitive_interfaces);
5770
5771 assert(_parsed_annotations != nullptr, "invariant");
5772
5773 _field_info = new FieldLayoutInfo();
5774 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, /*_fields*/ _temp_field_info,
5775 _parsed_annotations->is_contended(), _field_info);
5776 lb.build_layout();
5777
5778 int injected_fields_count = _temp_field_info->length() - _java_fields_count;
5779 _fieldinfo_stream =
5780 FieldInfoStream::create_FieldInfoStream(_temp_field_info, _java_fields_count,
5781 injected_fields_count, loader_data(), CHECK);
5782 _fields_status =
5783 MetadataFactory::new_array<FieldStatus>(_loader_data, _temp_field_info->length(),
5784 FieldStatus(0), CHECK);
5785 }
5786
5787 void ClassFileParser::set_klass(InstanceKlass* klass) {
5788
5789 #ifdef ASSERT
5790 if (klass != nullptr) {
5791 assert(nullptr == _klass, "leaking?");
5792 }
5793 #endif
5794
5795 _klass = klass;
5796 }
5797
5798 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5799
5800 #ifdef ASSERT
5801 if (klass != nullptr) {
5802 assert(nullptr == _klass_to_deallocate, "leaking?");
5803 }
5804 #endif
5805
5806 _klass_to_deallocate = klass;
5807 }
5808
5809 // Caller responsible for ResourceMark
5810 // clone stream with rewound position
5811 const ClassFileStream* ClassFileParser::clone_stream() const {
5812 assert(_stream != nullptr, "invariant");
5813
5814 return _stream->clone();
5815 }
5816
5817 ReferenceType ClassFileParser::super_reference_type() const {
5818 return _super_klass == nullptr ? REF_NONE : _super_klass->reference_type();
5819 }
5820
5821 bool ClassFileParser::is_instance_ref_klass() const {
5822 // Only the subclasses of j.l.r.Reference are InstanceRefKlass.
5823 // j.l.r.Reference itself is InstanceKlass because InstanceRefKlass denotes a
5824 // klass requiring special treatment in ref-processing. The abstract
5825 // j.l.r.Reference cannot be instantiated so doesn't partake in
5826 // ref-processing.
5827 return is_java_lang_ref_Reference_subclass();
5828 }
5829
5830 bool ClassFileParser::is_java_lang_ref_Reference_subclass() const {
5831 if (_super_klass == nullptr) {
5832 return false;
5833 }
5834
5835 if (_super_klass->name() == vmSymbols::java_lang_ref_Reference()) {
5836 // Direct subclass of j.l.r.Reference: Soft|Weak|Final|Phantom
5837 return true;
5838 }
5839
5840 return _super_klass->reference_type() != REF_NONE;
5841 }
5842
5843 // Returns true if the future Klass will need to be addressable with a narrow Klass ID.
5844 bool ClassFileParser::klass_needs_narrow_id() const {
5845 // Classes that are never instantiated need no narrow Klass Id, since the
5846 // only point of having a narrow id is to put it into an object header. Keeping
5847 // never instantiated classes out of class space lessens the class space pressure.
5848 // For more details, see JDK-8338526.
5849 return !is_interface() && !is_abstract();
5850 }
5851
5852 // ----------------------------------------------------------------------------
5853 // debugging
5854
5855 #ifdef ASSERT
5856
5857 // return true if class_name contains no '.' (internal format is '/')
5858 bool ClassFileParser::is_internal_format(Symbol* class_name) {
5859 if (class_name != nullptr) {
5860 ResourceMark rm;
5861 char* name = class_name->as_C_string();
5862 return strchr(name, JVM_SIGNATURE_DOT) == nullptr;
5863 } else {
5864 return true;
5865 }
5866 }
5867
5868 #endif