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/bsmAttribute.inline.hpp"
51 #include "oops/constantPool.inline.hpp"
52 #include "oops/fieldInfo.hpp"
53 #include "oops/fieldStreams.inline.hpp"
54 #include "oops/instanceKlass.inline.hpp"
55 #include "oops/instanceMirrorKlass.hpp"
56 #include "oops/klass.inline.hpp"
57 #include "oops/klassVtable.hpp"
58 #include "oops/metadata.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/oop.inline.hpp"
61 #include "oops/recordComponent.hpp"
62 #include "oops/symbol.hpp"
63 #include "prims/jvmtiExport.hpp"
64 #include "prims/jvmtiThreadState.hpp"
65 #include "runtime/arguments.hpp"
66 #include "runtime/fieldDescriptor.inline.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/os.hpp"
70 #include "runtime/perfData.hpp"
71 #include "runtime/reflection.hpp"
72 #include "runtime/safepointVerifiers.hpp"
73 #include "runtime/signature.hpp"
74 #include "runtime/timer.hpp"
75 #include "services/classLoadingService.hpp"
76 #include "services/threadService.hpp"
77 #include "utilities/align.hpp"
78 #include "utilities/bitMap.inline.hpp"
79 #include "utilities/checkedCast.hpp"
80 #include "utilities/copy.hpp"
81 #include "utilities/exceptions.hpp"
82 #include "utilities/formatBuffer.hpp"
83 #include "utilities/globalDefinitions.hpp"
84 #include "utilities/growableArray.hpp"
85 #include "utilities/hashTable.hpp"
86 #include "utilities/macros.hpp"
87 #include "utilities/ostream.hpp"
88 #include "utilities/utf8.hpp"
89 #if INCLUDE_CDS
90 #include "classfile/systemDictionaryShared.hpp"
91 #endif
92 #if INCLUDE_JFR
93 #include "jfr/support/jfrTraceIdExtension.hpp"
94 #endif
95
96 // We generally try to create the oops directly when parsing, rather than
97 // allocating temporary data structures and copying the bytes twice. A
98 // temporary area is only needed when parsing utf8 entries in the constant
99 // pool and when parsing line number tables.
100
101 // We add assert in debug mode when class format is not checked.
102
103 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
104 #define JAVA_MIN_SUPPORTED_VERSION 45
105 #define JAVA_PREVIEW_MINOR_VERSION 65535
106
107 // Used for two backward compatibility reasons:
108 // - to check for new additions to the class file format in JDK1.5
109 // - to check for bug fixes in the format checker in JDK1.5
110 #define JAVA_1_5_VERSION 49
111
112 // Used for backward compatibility reasons:
113 // - to check for javac bug fixes that happened after 1.5
114 // - also used as the max version when running in jdk6
115 #define JAVA_6_VERSION 50
116
117 // Used for backward compatibility reasons:
118 // - to disallow argument and require ACC_STATIC for <clinit> methods
119 #define JAVA_7_VERSION 51
120
121 // Extension method support.
122 #define JAVA_8_VERSION 52
123
124 #define JAVA_9_VERSION 53
125
126 #define JAVA_10_VERSION 54
127
128 #define JAVA_11_VERSION 55
129
130 #define JAVA_12_VERSION 56
131
132 #define JAVA_13_VERSION 57
133
134 #define JAVA_14_VERSION 58
135
136 #define JAVA_15_VERSION 59
137
138 #define JAVA_16_VERSION 60
139
140 #define JAVA_17_VERSION 61
141
142 #define JAVA_18_VERSION 62
143
144 #define JAVA_19_VERSION 63
145
146 #define JAVA_20_VERSION 64
147
148 #define JAVA_21_VERSION 65
149
150 #define JAVA_22_VERSION 66
151
152 #define JAVA_23_VERSION 67
153
154 #define JAVA_24_VERSION 68
155
156 #define JAVA_25_VERSION 69
157
158 #define JAVA_26_VERSION 70
159
160 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
161 assert((bad_constant == JVM_CONSTANT_Module ||
162 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
163 "Unexpected bad constant pool entry");
164 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
165 }
166
167 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
168 ConstantPool* cp,
169 const int length,
170 TRAPS) {
171 assert(stream != nullptr, "invariant");
172 assert(cp != nullptr, "invariant");
173
174 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
175 // this function (_current can be allocated in a register, with scalar
176 // replacement of aggregates). The _current pointer is copied back to
177 // stream() when this function returns. DON'T call another method within
178 // this method that uses stream().
179 const ClassFileStream cfs1 = *stream;
180 const ClassFileStream* const cfs = &cfs1;
181
182 DEBUG_ONLY(const u1* const old_current = stream->current();)
183
184 // Used for batching symbol allocations.
185 const char* names[SymbolTable::symbol_alloc_batch_size];
186 int lengths[SymbolTable::symbol_alloc_batch_size];
187 int indices[SymbolTable::symbol_alloc_batch_size];
188 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
189 int names_count = 0;
190
191 // parsing Index 0 is unused
192 for (int index = 1; index < length; index++) {
193 // Each of the following case guarantees one more byte in the stream
194 // for the following tag or the access_flags following constant pool,
195 // so we don't need bounds-check for reading tag.
196 const u1 tag = cfs->get_u1_fast();
197 switch (tag) {
198 case JVM_CONSTANT_Class : {
199 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
200 const u2 name_index = cfs->get_u2_fast();
201 cp->klass_index_at_put(index, name_index);
202 break;
203 }
204 case JVM_CONSTANT_Fieldref: {
205 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
206 const u2 class_index = cfs->get_u2_fast();
207 const u2 name_and_type_index = cfs->get_u2_fast();
208 cp->field_at_put(index, class_index, name_and_type_index);
209 break;
210 }
211 case JVM_CONSTANT_Methodref: {
212 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
213 const u2 class_index = cfs->get_u2_fast();
214 const u2 name_and_type_index = cfs->get_u2_fast();
215 cp->method_at_put(index, class_index, name_and_type_index);
216 break;
217 }
218 case JVM_CONSTANT_InterfaceMethodref: {
219 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
220 const u2 class_index = cfs->get_u2_fast();
221 const u2 name_and_type_index = cfs->get_u2_fast();
222 cp->interface_method_at_put(index, class_index, name_and_type_index);
223 break;
224 }
225 case JVM_CONSTANT_String : {
226 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
227 const u2 string_index = cfs->get_u2_fast();
228 cp->string_index_at_put(index, string_index);
229 break;
230 }
231 case JVM_CONSTANT_MethodHandle :
232 case JVM_CONSTANT_MethodType: {
233 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
234 classfile_parse_error(
235 "Class file version does not support constant tag %u in class file %s",
236 tag, THREAD);
237 return;
238 }
239 if (tag == JVM_CONSTANT_MethodHandle) {
240 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
241 const u1 ref_kind = cfs->get_u1_fast();
242 const u2 method_index = cfs->get_u2_fast();
243 cp->method_handle_index_at_put(index, ref_kind, method_index);
244 }
245 else if (tag == JVM_CONSTANT_MethodType) {
246 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
247 const u2 signature_index = cfs->get_u2_fast();
248 cp->method_type_index_at_put(index, signature_index);
249 }
250 else {
251 ShouldNotReachHere();
252 }
253 break;
254 }
255 case JVM_CONSTANT_Dynamic : {
256 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
257 classfile_parse_error(
258 "Class file version does not support constant tag %u in class file %s",
259 tag, THREAD);
260 return;
261 }
262 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
263 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
264 const u2 name_and_type_index = cfs->get_u2_fast();
265 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
266 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
267 }
268 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
269 break;
270 }
271 case JVM_CONSTANT_InvokeDynamic : {
272 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
273 classfile_parse_error(
274 "Class file version does not support constant tag %u in class file %s",
275 tag, THREAD);
276 return;
277 }
278 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
279 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
280 const u2 name_and_type_index = cfs->get_u2_fast();
281 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
282 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
283 }
284 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
285 break;
286 }
287 case JVM_CONSTANT_Integer: {
288 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
289 const u4 bytes = cfs->get_u4_fast();
290 cp->int_at_put(index, (jint)bytes);
291 break;
292 }
293 case JVM_CONSTANT_Float: {
294 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
295 const u4 bytes = cfs->get_u4_fast();
296 cp->float_at_put(index, *(jfloat*)&bytes);
297 break;
298 }
299 case JVM_CONSTANT_Long: {
300 // A mangled type might cause you to overrun allocated memory
301 guarantee_property(index + 1 < length,
302 "Invalid constant pool entry %u in class file %s",
303 index,
304 CHECK);
305 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
306 const u8 bytes = cfs->get_u8_fast();
307 cp->long_at_put(index, bytes);
308 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
309 break;
310 }
311 case JVM_CONSTANT_Double: {
312 // A mangled type might cause you to overrun allocated memory
313 guarantee_property(index+1 < length,
314 "Invalid constant pool entry %u in class file %s",
315 index,
316 CHECK);
317 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
318 const u8 bytes = cfs->get_u8_fast();
319 cp->double_at_put(index, *(jdouble*)&bytes);
320 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
321 break;
322 }
323 case JVM_CONSTANT_NameAndType: {
324 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
325 const u2 name_index = cfs->get_u2_fast();
326 const u2 signature_index = cfs->get_u2_fast();
327 cp->name_and_type_at_put(index, name_index, signature_index);
328 break;
329 }
330 case JVM_CONSTANT_Utf8 : {
331 cfs->guarantee_more(2, CHECK); // utf8_length
332 u2 utf8_length = cfs->get_u2_fast();
333 const u1* utf8_buffer = cfs->current();
334 assert(utf8_buffer != nullptr, "null utf8 buffer");
335 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
336 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
337 cfs->skip_u1_fast(utf8_length);
338
339 // Before storing the symbol, make sure it's legal
340 if (_need_verify) {
341 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
342 }
343
344 unsigned int hash;
345 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
346 utf8_length,
347 hash);
348 if (result == nullptr) {
349 names[names_count] = (const char*)utf8_buffer;
350 lengths[names_count] = utf8_length;
351 indices[names_count] = index;
352 hashValues[names_count++] = hash;
353 if (names_count == SymbolTable::symbol_alloc_batch_size) {
354 SymbolTable::new_symbols(_loader_data,
355 constantPoolHandle(THREAD, cp),
356 names_count,
357 names,
358 lengths,
359 indices,
360 hashValues);
361 names_count = 0;
362 }
363 } else {
364 cp->symbol_at_put(index, result);
365 }
366 break;
367 }
368 case JVM_CONSTANT_Module:
369 case JVM_CONSTANT_Package: {
370 // Record that an error occurred in these two cases but keep parsing so
371 // that ACC_Module can be checked for in the access_flags. Need to
372 // throw NoClassDefFoundError in that case.
373 if (_major_version >= JAVA_9_VERSION) {
374 cfs->guarantee_more(3, CHECK);
375 cfs->get_u2_fast();
376 set_class_bad_constant_seen(tag);
377 break;
378 }
379 }
380 default: {
381 classfile_parse_error("Unknown constant tag %u in class file %s",
382 tag,
383 THREAD);
384 return;
385 }
386 } // end of switch(tag)
387 } // end of for
388
389 // Allocate the remaining symbols
390 if (names_count > 0) {
391 SymbolTable::new_symbols(_loader_data,
392 constantPoolHandle(THREAD, cp),
393 names_count,
394 names,
395 lengths,
396 indices,
397 hashValues);
398 }
399
400 // Copy _current pointer of local copy back to stream.
401 assert(stream->current() == old_current, "non-exclusive use of stream");
402 stream->set_current(cfs1.current());
403
404 }
405
406 static inline bool valid_cp_range(int index, int length) {
407 return (index > 0 && index < length);
408 }
409
410 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
411 assert(cp != nullptr, "invariant");
412 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
413 return cp->symbol_at(index);
414 }
415 return nullptr;
416 }
417
418 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
419 ConstantPool* const cp,
420 const int length,
421 TRAPS) {
422 assert(cp != nullptr, "invariant");
423 assert(stream != nullptr, "invariant");
424
425 // parsing constant pool entries
426 parse_constant_pool_entries(stream, cp, length, CHECK);
427 if (class_bad_constant_seen() != 0) {
428 // a bad CP entry has been detected previously so stop parsing and just return.
429 return;
430 }
431
432 int index = 1; // declared outside of loops for portability
433 int num_klasses = 0;
434
435 // first verification pass - validate cross references
436 // and fixup class and string constants
437 for (index = 1; index < length; index++) { // Index 0 is unused
438 const jbyte tag = cp->tag_at(index).value();
439 switch (tag) {
440 case JVM_CONSTANT_Class: {
441 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
442 break;
443 }
444 case JVM_CONSTANT_Fieldref:
445 // fall through
446 case JVM_CONSTANT_Methodref:
447 // fall through
448 case JVM_CONSTANT_InterfaceMethodref: {
449 if (!_need_verify) break;
450 const int klass_ref_index = cp->uncached_klass_ref_index_at(index);
451 const int name_and_type_ref_index = cp->uncached_name_and_type_ref_index_at(index);
452 guarantee_property(valid_klass_reference_at(klass_ref_index),
453 "Invalid constant pool index %u in class file %s",
454 klass_ref_index, CHECK);
455 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
456 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
457 "Invalid constant pool index %u in class file %s",
458 name_and_type_ref_index, CHECK);
459 break;
460 }
461 case JVM_CONSTANT_String: {
462 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
463 break;
464 }
465 case JVM_CONSTANT_Integer:
466 break;
467 case JVM_CONSTANT_Float:
468 break;
469 case JVM_CONSTANT_Long:
470 case JVM_CONSTANT_Double: {
471 index++;
472 guarantee_property(
473 (index < length && cp->tag_at(index).is_invalid()),
474 "Improper constant pool long/double index %u in class file %s",
475 index, CHECK);
476 break;
477 }
478 case JVM_CONSTANT_NameAndType: {
479 if (!_need_verify) break;
480 const int name_ref_index = cp->name_ref_index_at(index);
481 const int signature_ref_index = cp->signature_ref_index_at(index);
482 guarantee_property(valid_symbol_at(name_ref_index),
483 "Invalid constant pool index %u in class file %s",
484 name_ref_index, CHECK);
485 guarantee_property(valid_symbol_at(signature_ref_index),
486 "Invalid constant pool index %u in class file %s",
487 signature_ref_index, CHECK);
488 break;
489 }
490 case JVM_CONSTANT_Utf8:
491 break;
492 case JVM_CONSTANT_UnresolvedClass: // fall-through
493 case JVM_CONSTANT_UnresolvedClassInError: {
494 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
495 break;
496 }
497 case JVM_CONSTANT_ClassIndex: {
498 const int class_index = cp->klass_index_at(index);
499 guarantee_property(valid_symbol_at(class_index),
500 "Invalid constant pool index %u in class file %s",
501 class_index, CHECK);
502 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
503 break;
504 }
505 case JVM_CONSTANT_StringIndex: {
506 const int string_index = cp->string_index_at(index);
507 guarantee_property(valid_symbol_at(string_index),
508 "Invalid constant pool index %u in class file %s",
509 string_index, CHECK);
510 Symbol* const sym = cp->symbol_at(string_index);
511 cp->unresolved_string_at_put(index, sym);
512 break;
513 }
514 case JVM_CONSTANT_MethodHandle: {
515 const int ref_index = cp->method_handle_index_at(index);
516 guarantee_property(valid_cp_range(ref_index, length),
517 "Invalid constant pool index %u in class file %s",
518 ref_index, CHECK);
519 const constantTag tag = cp->tag_at(ref_index);
520 const int ref_kind = cp->method_handle_ref_kind_at(index);
521
522 switch (ref_kind) {
523 case JVM_REF_getField:
524 case JVM_REF_getStatic:
525 case JVM_REF_putField:
526 case JVM_REF_putStatic: {
527 guarantee_property(
528 tag.is_field(),
529 "Invalid constant pool index %u in class file %s (not a field)",
530 ref_index, CHECK);
531 break;
532 }
533 case JVM_REF_invokeVirtual:
534 case JVM_REF_newInvokeSpecial: {
535 guarantee_property(
536 tag.is_method(),
537 "Invalid constant pool index %u in class file %s (not a method)",
538 ref_index, CHECK);
539 break;
540 }
541 case JVM_REF_invokeStatic:
542 case JVM_REF_invokeSpecial: {
543 guarantee_property(
544 tag.is_method() ||
545 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
546 "Invalid constant pool index %u in class file %s (not a method)",
547 ref_index, CHECK);
548 break;
549 }
550 case JVM_REF_invokeInterface: {
551 guarantee_property(
552 tag.is_interface_method(),
553 "Invalid constant pool index %u in class file %s (not an interface method)",
554 ref_index, CHECK);
555 break;
556 }
557 default: {
558 classfile_parse_error(
559 "Bad method handle kind at constant pool index %u in class file %s",
560 index, THREAD);
561 return;
562 }
563 } // switch(refkind)
564 // Keep the ref_index unchanged. It will be indirected at link-time.
565 break;
566 } // case MethodHandle
567 case JVM_CONSTANT_MethodType: {
568 const int ref_index = cp->method_type_index_at(index);
569 guarantee_property(valid_symbol_at(ref_index),
570 "Invalid constant pool index %u in class file %s",
571 ref_index, CHECK);
572 break;
573 }
574 case JVM_CONSTANT_Dynamic: {
575 const int name_and_type_ref_index =
576 cp->bootstrap_name_and_type_ref_index_at(index);
577
578 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
579 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
580 "Invalid constant pool index %u in class file %s",
581 name_and_type_ref_index, CHECK);
582 // bootstrap specifier index must be checked later,
583 // when BootstrapMethods attr is available
584
585 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
586 cp->set_has_dynamic_constant();
587 break;
588 }
589 case JVM_CONSTANT_InvokeDynamic: {
590 const int name_and_type_ref_index =
591 cp->bootstrap_name_and_type_ref_index_at(index);
592
593 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
594 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
595 "Invalid constant pool index %u in class file %s",
596 name_and_type_ref_index, CHECK);
597 // bootstrap specifier index must be checked later,
598 // when BootstrapMethods attr is available
599 break;
600 }
601 default: {
602 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
603 ShouldNotReachHere();
604 break;
605 }
606 } // switch(tag)
607 } // end of for
608
609 cp->allocate_resolved_klasses(_loader_data, num_klasses, CHECK);
610
611 if (!_need_verify) {
612 return;
613 }
614
615 // second verification pass - checks the strings are of the right format.
616 // but not yet to the other entries
617 for (index = 1; index < length; index++) {
618 const jbyte tag = cp->tag_at(index).value();
619 switch (tag) {
620 case JVM_CONSTANT_UnresolvedClass: {
621 const Symbol* const class_name = cp->klass_name_at(index);
622 // check the name
623 verify_legal_class_name(class_name, CHECK);
624 break;
625 }
626 case JVM_CONSTANT_NameAndType: {
627 if (_need_verify) {
628 const int sig_index = cp->signature_ref_index_at(index);
629 const int name_index = cp->name_ref_index_at(index);
630 const Symbol* const name = cp->symbol_at(name_index);
631 const Symbol* const sig = cp->symbol_at(sig_index);
632 guarantee_property(sig->utf8_length() != 0,
633 "Illegal zero length constant pool entry at %d in class %s",
634 sig_index, CHECK);
635 guarantee_property(name->utf8_length() != 0,
636 "Illegal zero length constant pool entry at %d in class %s",
637 name_index, CHECK);
638
639 if (Signature::is_method(sig)) {
640 // Format check method name and signature
641 verify_legal_method_name(name, CHECK);
642 verify_legal_method_signature(name, sig, CHECK);
643 } else {
644 // Format check field name and signature
645 verify_legal_field_name(name, CHECK);
646 verify_legal_field_signature(name, sig, CHECK);
647 }
648 }
649 break;
650 }
651 case JVM_CONSTANT_Dynamic: {
652 const int name_and_type_ref_index =
653 cp->uncached_name_and_type_ref_index_at(index);
654 // already verified to be utf8
655 const int name_ref_index =
656 cp->name_ref_index_at(name_and_type_ref_index);
657 // already verified to be utf8
658 const int signature_ref_index =
659 cp->signature_ref_index_at(name_and_type_ref_index);
660 const Symbol* const name = cp->symbol_at(name_ref_index);
661 const Symbol* const signature = cp->symbol_at(signature_ref_index);
662 if (_need_verify) {
663 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
664 // Need only to be sure signature is the right type.
665 if (Signature::is_method(signature)) {
666 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
667 }
668 }
669 break;
670 }
671 case JVM_CONSTANT_InvokeDynamic:
672 case JVM_CONSTANT_Fieldref:
673 case JVM_CONSTANT_Methodref:
674 case JVM_CONSTANT_InterfaceMethodref: {
675 const int name_and_type_ref_index =
676 cp->uncached_name_and_type_ref_index_at(index);
677 // already verified to be utf8
678 const int name_ref_index =
679 cp->name_ref_index_at(name_and_type_ref_index);
680 // already verified to be utf8
681 const int signature_ref_index =
682 cp->signature_ref_index_at(name_and_type_ref_index);
683 const Symbol* const name = cp->symbol_at(name_ref_index);
684 const Symbol* const signature = cp->symbol_at(signature_ref_index);
685 if (tag == JVM_CONSTANT_Fieldref) {
686 if (_need_verify) {
687 // Field name and signature are verified above, when iterating NameAndType_info.
688 // Need only to be sure signature is non-zero length and the right type.
689 if (Signature::is_method(signature)) {
690 throwIllegalSignature("Field", name, signature, CHECK);
691 }
692 }
693 } else {
694 if (_need_verify) {
695 // Method name and signature are individually verified above, when iterating
696 // NameAndType_info. Need to check here that signature is non-zero length and
697 // the right type.
698 if (!Signature::is_method(signature)) {
699 throwIllegalSignature("Method", name, signature, CHECK);
700 }
701 }
702 // If a class method name begins with '<', it must be "<init>" and have void signature.
703 const unsigned int name_len = name->utf8_length();
704 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
705 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
706 if (name != vmSymbols::object_initializer_name()) {
707 classfile_parse_error(
708 "Bad method name at constant pool index %u in class file %s",
709 name_ref_index, THREAD);
710 return;
711 } else if (!Signature::is_void_method(signature)) { // must have void signature.
712 throwIllegalSignature("Method", name, signature, CHECK);
713 }
714 }
715 }
716 break;
717 }
718 case JVM_CONSTANT_MethodHandle: {
719 const int ref_index = cp->method_handle_index_at(index);
720 const int ref_kind = cp->method_handle_ref_kind_at(index);
721 switch (ref_kind) {
722 case JVM_REF_invokeVirtual:
723 case JVM_REF_invokeStatic:
724 case JVM_REF_invokeSpecial:
725 case JVM_REF_newInvokeSpecial: {
726 const int name_and_type_ref_index =
727 cp->uncached_name_and_type_ref_index_at(ref_index);
728 const int name_ref_index =
729 cp->name_ref_index_at(name_and_type_ref_index);
730 const Symbol* const name = cp->symbol_at(name_ref_index);
731 if (ref_kind == JVM_REF_newInvokeSpecial) {
732 if (name != vmSymbols::object_initializer_name()) {
733 classfile_parse_error(
734 "Bad constructor name at constant pool index %u in class file %s",
735 name_ref_index, THREAD);
736 return;
737 }
738 } else {
739 if (name == vmSymbols::object_initializer_name()) {
740 classfile_parse_error(
741 "Bad method name at constant pool index %u in class file %s",
742 name_ref_index, THREAD);
743 return;
744 }
745 }
746 break;
747 }
748 // Other ref_kinds are already fully checked in previous pass.
749 } // switch(ref_kind)
750 break;
751 }
752 case JVM_CONSTANT_MethodType: {
753 const Symbol* const no_name = vmSymbols::type_name(); // place holder
754 const Symbol* const signature = cp->method_type_signature_at(index);
755 verify_legal_method_signature(no_name, signature, CHECK);
756 break;
757 }
758 case JVM_CONSTANT_Utf8: {
759 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
760 }
761 } // switch(tag)
762 } // end of for
763 }
764
765 class NameSigHash: public ResourceObj {
766 public:
767 const Symbol* _name; // name
768 const Symbol* _sig; // signature
769
770 static const int HASH_ROW_SIZE = 256;
771
772 NameSigHash(Symbol* name, Symbol* sig) :
773 _name(name),
774 _sig(sig) {}
775
776 static unsigned int hash(NameSigHash const& namesig) {
777 return namesig._name->identity_hash() ^ namesig._sig->identity_hash();
778 }
779
780 static bool equals(NameSigHash const& e0, NameSigHash const& e1) {
781 return (e0._name == e1._name) &&
782 (e0._sig == e1._sig);
783 }
784 };
785
786 using NameSigHashtable = HashTable<NameSigHash, int,
787 NameSigHash::HASH_ROW_SIZE,
788 AnyObj::RESOURCE_AREA, mtInternal,
789 &NameSigHash::hash, &NameSigHash::equals>;
790
791 // Side-effects: populates the _local_interfaces field
792 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
793 const int itfs_len,
794 ConstantPool* const cp,
795 bool* const has_nonstatic_concrete_methods,
796 TRAPS) {
797 assert(stream != nullptr, "invariant");
798 assert(cp != nullptr, "invariant");
799 assert(has_nonstatic_concrete_methods != nullptr, "invariant");
800
801 if (itfs_len == 0) {
802 _local_interfaces = Universe::the_empty_instance_klass_array();
803 } else {
804 assert(itfs_len > 0, "only called for len>0");
805 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, nullptr, CHECK);
806
807 int index;
808 for (index = 0; index < itfs_len; index++) {
809 const u2 interface_index = stream->get_u2(CHECK);
810 Klass* interf;
811 guarantee_property(
812 valid_klass_reference_at(interface_index),
813 "Interface name has bad constant pool index %u in class file %s",
814 interface_index, CHECK);
815 if (cp->tag_at(interface_index).is_klass()) {
816 interf = cp->resolved_klass_at(interface_index);
817 } else {
818 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
819
820 // Don't need to check legal name because it's checked when parsing constant pool.
821 // But need to make sure it's not an array type.
822 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
823 "Bad interface name in class file %s", CHECK);
824
825 // Call resolve on the interface class name with class circularity checking
826 interf = SystemDictionary::resolve_super_or_fail(_class_name,
827 unresolved_klass,
828 Handle(THREAD, _loader_data->class_loader()),
829 false, CHECK);
830 }
831
832 if (!interf->is_interface()) {
833 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
834 err_msg("class %s can not implement %s, because it is not an interface (%s)",
835 _class_name->as_klass_external_name(),
836 interf->external_name(),
837 interf->class_in_module_of_loader()));
838 }
839
840 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
841 *has_nonstatic_concrete_methods = true;
842 }
843 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
844 }
845
846 if (!_need_verify || itfs_len <= 1) {
847 return;
848 }
849
850 // Check if there's any duplicates in interfaces
851 ResourceMark rm(THREAD);
852 // Set containing interface names
853 HashTable<Symbol*, int>* interface_names = new HashTable<Symbol*, int>();
854 for (index = 0; index < itfs_len; index++) {
855 const InstanceKlass* const k = _local_interfaces->at(index);
856 Symbol* interface_name = k->name();
857 // If no duplicates, add (name, nullptr) in hashtable interface_names.
858 if (!interface_names->put(interface_name, 0)) {
859 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
860 interface_name->as_C_string(), THREAD);
861 return;
862 }
863 }
864 }
865 }
866
867 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
868 int constantvalue_index,
869 int signature_index,
870 TRAPS) const {
871 // Make sure the constant pool entry is of a type appropriate to this field
872 guarantee_property(
873 (constantvalue_index > 0 &&
874 constantvalue_index < cp->length()),
875 "Bad initial value index %u in ConstantValue attribute in class file %s",
876 constantvalue_index, CHECK);
877
878 const constantTag value_type = cp->tag_at(constantvalue_index);
879 switch(cp->basic_type_for_signature_at(signature_index)) {
880 case T_LONG: {
881 guarantee_property(value_type.is_long(),
882 "Inconsistent constant value type in class file %s",
883 CHECK);
884 break;
885 }
886 case T_FLOAT: {
887 guarantee_property(value_type.is_float(),
888 "Inconsistent constant value type in class file %s",
889 CHECK);
890 break;
891 }
892 case T_DOUBLE: {
893 guarantee_property(value_type.is_double(),
894 "Inconsistent constant value type in class file %s",
895 CHECK);
896 break;
897 }
898 case T_BYTE:
899 case T_CHAR:
900 case T_SHORT:
901 case T_BOOLEAN:
902 case T_INT: {
903 guarantee_property(value_type.is_int(),
904 "Inconsistent constant value type in class file %s",
905 CHECK);
906 break;
907 }
908 case T_OBJECT: {
909 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
910 && value_type.is_string()),
911 "Bad string initial value in class file %s",
912 CHECK);
913 break;
914 }
915 default: {
916 classfile_parse_error("Unable to set initial value %u in class file %s",
917 constantvalue_index,
918 THREAD);
919 }
920 }
921 }
922
923 class AnnotationCollector : public ResourceObj{
924 public:
925 enum Location { _in_field, _in_method, _in_class };
926 enum ID {
927 _unknown = 0,
928 _method_CallerSensitive,
929 _method_ForceInline,
930 _method_DontInline,
931 _method_ChangesCurrentThread,
932 _method_JvmtiHideEvents,
933 _method_JvmtiMountTransition,
934 _method_InjectedProfile,
935 _method_LambdaForm_Compiled,
936 _method_Hidden,
937 _method_Scoped,
938 _method_IntrinsicCandidate,
939 _jdk_internal_vm_annotation_Contended,
940 _field_Stable,
941 _jdk_internal_vm_annotation_ReservedStackAccess,
942 _jdk_internal_ValueBased,
943 _java_lang_Deprecated,
944 _java_lang_Deprecated_for_removal,
945 _jdk_internal_vm_annotation_AOTSafeClassInitializer,
946 _method_AOTRuntimeSetup,
947 _annotation_LIMIT
948 };
949 const Location _location;
950 int _annotations_present;
951 u2 _contended_group;
952
953 AnnotationCollector(Location location)
954 : _location(location), _annotations_present(0), _contended_group(0)
955 {
956 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
957 }
958 // If this annotation name has an ID, report it (or _none).
959 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
960 // Set the annotation name:
961 void set_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 void remove_annotation(ID id) {
967 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
968 _annotations_present &= (int)~nth_bit((int)id);
969 }
970
971 // Report if the annotation is present.
972 bool has_any_annotations() const { return _annotations_present != 0; }
973 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
974
975 void set_contended_group(u2 group) { _contended_group = group; }
976 u2 contended_group() const { return _contended_group; }
977
978 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
979
980 void set_stable(bool stable) { set_annotation(_field_Stable); }
981 bool is_stable() const { return has_annotation(_field_Stable); }
982
983 bool has_aot_runtime_setup() const { return has_annotation(_method_AOTRuntimeSetup); }
984 };
985
986 // This class also doubles as a holder for metadata cleanup.
987 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
988 private:
989 ClassLoaderData* _loader_data;
990 AnnotationArray* _field_annotations;
991 AnnotationArray* _field_type_annotations;
992 public:
993 FieldAnnotationCollector(ClassLoaderData* loader_data) :
994 AnnotationCollector(_in_field),
995 _loader_data(loader_data),
996 _field_annotations(nullptr),
997 _field_type_annotations(nullptr) {}
998 ~FieldAnnotationCollector();
999 void apply_to(FieldInfo* f);
1000 AnnotationArray* field_annotations() { return _field_annotations; }
1001 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1002
1003 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1004 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1005 };
1006
1007 class MethodAnnotationCollector : public AnnotationCollector{
1008 public:
1009 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1010 void apply_to(const methodHandle& m);
1011 };
1012
1013 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1014 public:
1015 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1016 void apply_to(InstanceKlass* ik);
1017 };
1018
1019
1020 static int skip_annotation_value(const u1*, int, int); // fwd decl
1021
1022 // Safely increment index by val if does not pass limit
1023 #define SAFE_ADD(index, limit, val) \
1024 if (index >= limit - val) return limit; \
1025 index += val;
1026
1027 // Skip an annotation. Return >=limit if there is any problem.
1028 static int skip_annotation(const u1* buffer, int limit, int index) {
1029 assert(buffer != nullptr, "invariant");
1030 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1031 // value := switch (tag:u1) { ... }
1032 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1033 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1034 while (--nmem >= 0 && index < limit) {
1035 SAFE_ADD(index, limit, 2); // skip member
1036 index = skip_annotation_value(buffer, limit, index);
1037 }
1038 return index;
1039 }
1040
1041 // Skip an annotation value. Return >=limit if there is any problem.
1042 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1043 assert(buffer != nullptr, "invariant");
1044
1045 // value := switch (tag:u1) {
1046 // case B, C, I, S, Z, D, F, J, c: con:u2;
1047 // case e: e_class:u2 e_name:u2;
1048 // case s: s_con:u2;
1049 // case [: do(nval:u2) {value};
1050 // case @: annotation;
1051 // case s: s_con:u2;
1052 // }
1053 SAFE_ADD(index, limit, 1); // read tag
1054 const u1 tag = buffer[index - 1];
1055 switch (tag) {
1056 case 'B':
1057 case 'C':
1058 case 'I':
1059 case 'S':
1060 case 'Z':
1061 case 'D':
1062 case 'F':
1063 case 'J':
1064 case 'c':
1065 case 's':
1066 SAFE_ADD(index, limit, 2); // skip con or s_con
1067 break;
1068 case 'e':
1069 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1070 break;
1071 case '[':
1072 {
1073 SAFE_ADD(index, limit, 2); // read nval
1074 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1075 while (--nval >= 0 && index < limit) {
1076 index = skip_annotation_value(buffer, limit, index);
1077 }
1078 }
1079 break;
1080 case '@':
1081 index = skip_annotation(buffer, limit, index);
1082 break;
1083 default:
1084 return limit; // bad tag byte
1085 }
1086 return index;
1087 }
1088
1089 // Sift through annotations, looking for those significant to the VM:
1090 static void parse_annotations(const ConstantPool* const cp,
1091 const u1* buffer, int limit,
1092 AnnotationCollector* coll,
1093 ClassLoaderData* loader_data,
1094 const bool can_access_vm_annotations) {
1095
1096 assert(cp != nullptr, "invariant");
1097 assert(buffer != nullptr, "invariant");
1098 assert(coll != nullptr, "invariant");
1099 assert(loader_data != nullptr, "invariant");
1100
1101 // annotations := do(nann:u2) {annotation}
1102 int index = 2; // read nann
1103 if (index >= limit) return;
1104 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1105 enum { // initial annotation layout
1106 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1107 count_off = 2, // u2 such as 1 (one value)
1108 member_off = 4, // utf8 such as 'value'
1109 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1110 e_tag_val = 'e',
1111 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1112 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1113 e_size = 11, // end of 'e' annotation
1114 c_tag_val = 'c', // payload is type
1115 c_con_off = 7, // utf8 payload, such as 'I'
1116 c_size = 9, // end of 'c' annotation
1117 s_tag_val = 's', // payload is String
1118 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1119 s_size = 9,
1120 b_tag_val = 'Z', // payload is boolean
1121 min_size = 6 // smallest possible size (zero members)
1122 };
1123 // Cannot add min_size to index in case of overflow MAX_INT
1124 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1125 int index0 = index;
1126 index = skip_annotation(buffer, limit, index);
1127 const u1* const abase = buffer + index0;
1128 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1129 const int count = Bytes::get_Java_u2((address)abase + count_off);
1130 const Symbol* const aname = check_symbol_at(cp, atype);
1131 if (aname == nullptr) break; // invalid annotation name
1132 const Symbol* member = nullptr;
1133 if (count >= 1) {
1134 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1135 member = check_symbol_at(cp, member_index);
1136 if (member == nullptr) break; // invalid member name
1137 }
1138
1139 // Here is where parsing particular annotations will take place.
1140 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1141 if (AnnotationCollector::_unknown == id) continue;
1142 coll->set_annotation(id);
1143 if (AnnotationCollector::_java_lang_Deprecated == id) {
1144 // @Deprecated can specify forRemoval=true, which we need
1145 // to record for JFR to use. If the annotation is not well-formed
1146 // then we may not be able to determine that.
1147 const u1* offset = abase + member_off;
1148 // There are only 2 members in @Deprecated.
1149 int n_members = MIN2(count, 2);
1150 for (int i = 0; i < n_members; ++i) {
1151 int member_index = Bytes::get_Java_u2((address)offset);
1152 offset += 2;
1153 member = check_symbol_at(cp, member_index);
1154 if (member == vmSymbols::since() &&
1155 (*((address)offset) == s_tag_val)) {
1156 // Found `since` first so skip over it
1157 offset += 3;
1158 }
1159 else if (member == vmSymbols::for_removal() &&
1160 (*((address)offset) == b_tag_val)) {
1161 const u2 boolean_value_index = Bytes::get_Java_u2((address)offset + 1);
1162 // No guarantee the entry is valid so check it refers to an int in the CP.
1163 if (cp->is_within_bounds(boolean_value_index) &&
1164 cp->tag_at(boolean_value_index).is_int() &&
1165 cp->int_at(boolean_value_index) == 1) {
1166 // forRemoval == true
1167 coll->set_annotation(AnnotationCollector::_java_lang_Deprecated_for_removal);
1168 }
1169 break; // no need to check further
1170 }
1171 else {
1172 // This @Deprecated annotation is malformed so we don't try to
1173 // determine whether forRemoval is set.
1174 break;
1175 }
1176 }
1177 continue; // proceed to next annotation
1178 }
1179
1180 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1181 // @Contended can optionally specify the contention group.
1182 //
1183 // Contended group defines the equivalence class over the fields:
1184 // the fields within the same contended group are not treated distinct.
1185 // The only exception is default group, which does not incur the
1186 // equivalence. Naturally, contention group for classes is meaningless.
1187 //
1188 // While the contention group is specified as String, annotation
1189 // values are already interned, and we might as well use the constant
1190 // pool index as the group tag.
1191 //
1192 u2 group_index = 0; // default contended group
1193 if (count == 1
1194 && s_size == (index - index0) // match size
1195 && s_tag_val == *(abase + tag_off)
1196 && member == vmSymbols::value_name()) {
1197 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1198 // No guarantee the group_index is valid so check it refers to a
1199 // symbol in the CP.
1200 if (cp->is_within_bounds(group_index) &&
1201 cp->tag_at(group_index).is_utf8()) {
1202 // Seems valid, so check for empty string and reset
1203 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1204 group_index = 0; // default contended group
1205 }
1206 } else {
1207 // Not valid so use the default
1208 group_index = 0;
1209 }
1210 }
1211 coll->set_contended_group(group_index);
1212 continue; // proceed to next annotation
1213 }
1214 }
1215 }
1216
1217
1218 // Parse attributes for a field.
1219 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1220 u2 attributes_count,
1221 bool is_static, u2 signature_index,
1222 u2* const constantvalue_index_addr,
1223 bool* const is_synthetic_addr,
1224 u2* const generic_signature_index_addr,
1225 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1226 TRAPS) {
1227 assert(cfs != nullptr, "invariant");
1228 assert(constantvalue_index_addr != nullptr, "invariant");
1229 assert(is_synthetic_addr != nullptr, "invariant");
1230 assert(generic_signature_index_addr != nullptr, "invariant");
1231 assert(parsed_annotations != nullptr, "invariant");
1232 assert(attributes_count > 0, "attributes_count should be greater than 0");
1233
1234 u2 constantvalue_index = 0;
1235 u2 generic_signature_index = 0;
1236 bool is_synthetic = false;
1237 const u1* runtime_visible_annotations = nullptr;
1238 int runtime_visible_annotations_length = 0;
1239 const u1* runtime_visible_type_annotations = nullptr;
1240 int runtime_visible_type_annotations_length = 0;
1241 bool runtime_invisible_annotations_exists = false;
1242 bool runtime_invisible_type_annotations_exists = false;
1243 const ConstantPool* const cp = _cp;
1244
1245 while (attributes_count--) {
1246 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1247 const u2 attribute_name_index = cfs->get_u2_fast();
1248 const u4 attribute_length = cfs->get_u4_fast();
1249 guarantee_property(valid_symbol_at(attribute_name_index),
1250 "Invalid field attribute index %u in class file %s",
1251 attribute_name_index,
1252 CHECK);
1253
1254 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1255 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1256 // ignore if non-static
1257 if (constantvalue_index != 0) {
1258 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1259 return;
1260 }
1261 guarantee_property(
1262 attribute_length == 2,
1263 "Invalid ConstantValue field attribute length %u in class file %s",
1264 attribute_length, CHECK);
1265
1266 constantvalue_index = cfs->get_u2(CHECK);
1267 if (_need_verify) {
1268 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1269 }
1270 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1271 if (attribute_length != 0) {
1272 classfile_parse_error(
1273 "Invalid Synthetic field attribute length %u in class file %s",
1274 attribute_length, THREAD);
1275 return;
1276 }
1277 is_synthetic = true;
1278 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1279 if (attribute_length != 0) {
1280 classfile_parse_error(
1281 "Invalid Deprecated field attribute length %u in class file %s",
1282 attribute_length, THREAD);
1283 return;
1284 }
1285 } else if (_major_version >= JAVA_1_5_VERSION) {
1286 if (attribute_name == vmSymbols::tag_signature()) {
1287 if (generic_signature_index != 0) {
1288 classfile_parse_error(
1289 "Multiple Signature attributes for field in class file %s", THREAD);
1290 return;
1291 }
1292 if (attribute_length != 2) {
1293 classfile_parse_error(
1294 "Wrong size %u for field's Signature attribute in class file %s",
1295 attribute_length, THREAD);
1296 return;
1297 }
1298 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1299 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1300 if (runtime_visible_annotations != nullptr) {
1301 classfile_parse_error(
1302 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1303 return;
1304 }
1305 runtime_visible_annotations_length = attribute_length;
1306 runtime_visible_annotations = cfs->current();
1307 assert(runtime_visible_annotations != nullptr, "null visible annotations");
1308 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1309 parse_annotations(cp,
1310 runtime_visible_annotations,
1311 runtime_visible_annotations_length,
1312 parsed_annotations,
1313 _loader_data,
1314 _can_access_vm_annotations);
1315 cfs->skip_u1_fast(runtime_visible_annotations_length);
1316 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1317 if (runtime_invisible_annotations_exists) {
1318 classfile_parse_error(
1319 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1320 return;
1321 }
1322 runtime_invisible_annotations_exists = true;
1323 cfs->skip_u1(attribute_length, CHECK);
1324 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1325 if (runtime_visible_type_annotations != nullptr) {
1326 classfile_parse_error(
1327 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1328 return;
1329 }
1330 runtime_visible_type_annotations_length = attribute_length;
1331 runtime_visible_type_annotations = cfs->current();
1332 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
1333 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1334 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1335 if (runtime_invisible_type_annotations_exists) {
1336 classfile_parse_error(
1337 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1338 return;
1339 } else {
1340 runtime_invisible_type_annotations_exists = true;
1341 }
1342 cfs->skip_u1(attribute_length, CHECK);
1343 } else {
1344 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1345 }
1346 } else {
1347 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1348 }
1349 }
1350
1351 *constantvalue_index_addr = constantvalue_index;
1352 *is_synthetic_addr = is_synthetic;
1353 *generic_signature_index_addr = generic_signature_index;
1354 AnnotationArray* a = allocate_annotations(runtime_visible_annotations,
1355 runtime_visible_annotations_length,
1356 CHECK);
1357 parsed_annotations->set_field_annotations(a);
1358 a = allocate_annotations(runtime_visible_type_annotations,
1359 runtime_visible_type_annotations_length,
1360 CHECK);
1361 parsed_annotations->set_field_type_annotations(a);
1362 return;
1363 }
1364
1365
1366 // Side-effects: populates the _fields, _fields_annotations,
1367 // _fields_type_annotations fields
1368 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1369 bool is_interface,
1370 ConstantPool* cp,
1371 const int cp_size,
1372 u2* const java_fields_count_ptr,
1373 TRAPS) {
1374
1375 assert(cfs != nullptr, "invariant");
1376 assert(cp != nullptr, "invariant");
1377 assert(java_fields_count_ptr != nullptr, "invariant");
1378
1379 assert(nullptr == _fields_annotations, "invariant");
1380 assert(nullptr == _fields_type_annotations, "invariant");
1381
1382 cfs->guarantee_more(2, CHECK); // length
1383 const u2 length = cfs->get_u2_fast();
1384 *java_fields_count_ptr = length;
1385
1386 int num_injected = 0;
1387 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1388 &num_injected);
1389 const int total_fields = length + num_injected;
1390
1391 // Allocate a temporary resource array to collect field data.
1392 // After parsing all fields, data are stored in a UNSIGNED5 compressed stream.
1393 _temp_field_info = new GrowableArray<FieldInfo>(total_fields);
1394
1395 ResourceMark rm(THREAD);
1396 for (int n = 0; n < length; n++) {
1397 // access_flags, name_index, descriptor_index, attributes_count
1398 cfs->guarantee_more(8, CHECK);
1399
1400 AccessFlags access_flags;
1401 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1402 verify_legal_field_modifiers(flags, is_interface, CHECK);
1403 access_flags.set_flags(flags);
1404 FieldInfo::FieldFlags fieldFlags(0);
1405
1406 const u2 name_index = cfs->get_u2_fast();
1407 guarantee_property(valid_symbol_at(name_index),
1408 "Invalid constant pool index %u for field name in class file %s",
1409 name_index, CHECK);
1410 const Symbol* const name = cp->symbol_at(name_index);
1411 verify_legal_field_name(name, CHECK);
1412
1413 const u2 signature_index = cfs->get_u2_fast();
1414 guarantee_property(valid_symbol_at(signature_index),
1415 "Invalid constant pool index %u for field signature in class file %s",
1416 signature_index, CHECK);
1417 const Symbol* const sig = cp->symbol_at(signature_index);
1418 verify_legal_field_signature(name, sig, CHECK);
1419
1420 u2 constantvalue_index = 0;
1421 bool is_synthetic = false;
1422 u2 generic_signature_index = 0;
1423 const bool is_static = access_flags.is_static();
1424 FieldAnnotationCollector parsed_annotations(_loader_data);
1425
1426 const u2 attributes_count = cfs->get_u2_fast();
1427 if (attributes_count > 0) {
1428 parse_field_attributes(cfs,
1429 attributes_count,
1430 is_static,
1431 signature_index,
1432 &constantvalue_index,
1433 &is_synthetic,
1434 &generic_signature_index,
1435 &parsed_annotations,
1436 CHECK);
1437
1438 if (parsed_annotations.field_annotations() != nullptr) {
1439 if (_fields_annotations == nullptr) {
1440 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1441 _loader_data, length, nullptr,
1442 CHECK);
1443 }
1444 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1445 parsed_annotations.set_field_annotations(nullptr);
1446 }
1447 if (parsed_annotations.field_type_annotations() != nullptr) {
1448 if (_fields_type_annotations == nullptr) {
1449 _fields_type_annotations =
1450 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1451 length,
1452 nullptr,
1453 CHECK);
1454 }
1455 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1456 parsed_annotations.set_field_type_annotations(nullptr);
1457 }
1458
1459 if (is_synthetic) {
1460 access_flags.set_is_synthetic();
1461 }
1462 if (generic_signature_index != 0) {
1463 fieldFlags.update_generic(true);
1464 }
1465 }
1466
1467 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1468
1469 // Update number of static oop fields.
1470 if (is_static && is_reference_type(type)) {
1471 _static_oop_count++;
1472 }
1473
1474 FieldInfo fi(access_flags, name_index, signature_index, constantvalue_index, fieldFlags);
1475 fi.set_index(n);
1476 if (fieldFlags.is_generic()) {
1477 fi.set_generic_signature_index(generic_signature_index);
1478 }
1479 parsed_annotations.apply_to(&fi);
1480 if (fi.field_flags().is_contended()) {
1481 _has_contended_fields = true;
1482 }
1483 _temp_field_info->append(fi);
1484 }
1485 assert(_temp_field_info->length() == length, "Must be");
1486
1487 int index = length;
1488 if (num_injected != 0) {
1489 for (int n = 0; n < num_injected; n++) {
1490 // Check for duplicates
1491 if (injected[n].may_be_java) {
1492 const Symbol* const name = injected[n].name();
1493 const Symbol* const signature = injected[n].signature();
1494 bool duplicate = false;
1495 for (int i = 0; i < length; i++) {
1496 const FieldInfo* const f = _temp_field_info->adr_at(i);
1497 if (name == cp->symbol_at(f->name_index()) &&
1498 signature == cp->symbol_at(f->signature_index())) {
1499 // Symbol is desclared in Java so skip this one
1500 duplicate = true;
1501 break;
1502 }
1503 }
1504 if (duplicate) {
1505 // These will be removed from the field array at the end
1506 continue;
1507 }
1508 }
1509
1510 // Injected field
1511 FieldInfo::FieldFlags fflags(0);
1512 fflags.update_injected(true);
1513 AccessFlags aflags;
1514 FieldInfo fi(aflags, (u2)(injected[n].name_index), (u2)(injected[n].signature_index), 0, fflags);
1515 fi.set_index(index);
1516 _temp_field_info->append(fi);
1517 index++;
1518 }
1519 }
1520
1521 assert(_temp_field_info->length() == index, "Must be");
1522
1523 if (_need_verify && length > 1) {
1524 // Check duplicated fields
1525 ResourceMark rm(THREAD);
1526 // Set containing name-signature pairs
1527 NameSigHashtable* names_and_sigs = new NameSigHashtable();
1528 for (int i = 0; i < _temp_field_info->length(); i++) {
1529 NameSigHash name_and_sig(_temp_field_info->adr_at(i)->name(_cp),
1530 _temp_field_info->adr_at(i)->signature(_cp));
1531 // If no duplicates, add name/signature in hashtable names_and_sigs.
1532 if(!names_and_sigs->put(name_and_sig, 0)) {
1533 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1534 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
1535 return;
1536 }
1537 }
1538 }
1539 }
1540
1541
1542 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1543 u4 code_length,
1544 u4 exception_table_length,
1545 TRAPS) {
1546 assert(cfs != nullptr, "invariant");
1547
1548 const unsafe_u2* const exception_table_start = cfs->current();
1549 assert(exception_table_start != nullptr, "null exception table");
1550
1551 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1552 // end_pc,
1553 // handler_pc,
1554 // catch_type_index
1555
1556 // Will check legal target after parsing code array in verifier.
1557 if (_need_verify) {
1558 for (unsigned int i = 0; i < exception_table_length; i++) {
1559 const u2 start_pc = cfs->get_u2_fast();
1560 const u2 end_pc = cfs->get_u2_fast();
1561 const u2 handler_pc = cfs->get_u2_fast();
1562 const u2 catch_type_index = cfs->get_u2_fast();
1563 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1564 "Illegal exception table range in class file %s",
1565 CHECK_NULL);
1566 guarantee_property(handler_pc < code_length,
1567 "Illegal exception table handler in class file %s",
1568 CHECK_NULL);
1569 if (catch_type_index != 0) {
1570 guarantee_property(valid_klass_reference_at(catch_type_index),
1571 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1572 }
1573 }
1574 } else {
1575 cfs->skip_u2_fast(exception_table_length * 4);
1576 }
1577 return exception_table_start;
1578 }
1579
1580 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1581 u4 code_length,
1582 CompressedLineNumberWriteStream**const write_stream,
1583 TRAPS) {
1584
1585 const ClassFileStream* const cfs = _stream;
1586 unsigned int num_entries = cfs->get_u2(CHECK);
1587
1588 // Each entry is a u2 start_pc, and a u2 line_number
1589 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1590
1591 // Verify line number attribute and table length
1592 guarantee_property(
1593 code_attribute_length == sizeof(u2) + length_in_bytes,
1594 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1595
1596 cfs->guarantee_more(length_in_bytes, CHECK);
1597
1598 if ((*write_stream) == nullptr) {
1599 if (length_in_bytes > fixed_buffer_size) {
1600 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1601 } else {
1602 (*write_stream) = new CompressedLineNumberWriteStream(
1603 _linenumbertable_buffer, fixed_buffer_size);
1604 }
1605 }
1606
1607 while (num_entries-- > 0) {
1608 const u2 bci = cfs->get_u2_fast(); // start_pc
1609 const u2 line = cfs->get_u2_fast(); // line_number
1610 guarantee_property(bci < code_length,
1611 "Invalid pc in LineNumberTable in class file %s", CHECK);
1612 (*write_stream)->write_pair(bci, line);
1613 }
1614 }
1615
1616
1617 class LVT_Hash : public AllStatic {
1618 public:
1619
1620 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1621 /*
1622 * 3-tuple start_bci/length/slot has to be unique key,
1623 * so the following comparison seems to be redundant:
1624 * && elem->name_cp_index == entry->_elem->name_cp_index
1625 */
1626 return (e0.start_bci == e1.start_bci &&
1627 e0.length == e1.length &&
1628 e0.name_cp_index == e1.name_cp_index &&
1629 e0.slot == e1.slot);
1630 }
1631
1632 static unsigned int hash(LocalVariableTableElement const& e0) {
1633 unsigned int raw_hash = e0.start_bci;
1634
1635 raw_hash = e0.length + raw_hash * 37;
1636 raw_hash = e0.name_cp_index + raw_hash * 37;
1637 raw_hash = e0.slot + raw_hash * 37;
1638
1639 return raw_hash;
1640 }
1641 };
1642
1643
1644 // Class file LocalVariableTable elements.
1645 class Classfile_LVT_Element {
1646 public:
1647 u2 start_bci;
1648 u2 length;
1649 u2 name_cp_index;
1650 u2 descriptor_cp_index;
1651 u2 slot;
1652 };
1653
1654 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1655 LocalVariableTableElement* const lvt) {
1656 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1657 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1658 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1659 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1660 lvt->signature_cp_index = 0;
1661 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1662 }
1663
1664 // Function is used to parse both attributes:
1665 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1666 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1667 u4 code_length,
1668 u2 max_locals,
1669 u4 code_attribute_length,
1670 u2* const localvariable_table_length,
1671 bool isLVTT,
1672 TRAPS) {
1673 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1674 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1675 const unsigned int size = checked_cast<unsigned>(
1676 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2));
1677
1678 const ConstantPool* const cp = _cp;
1679
1680 // Verify local variable table attribute has right length
1681 if (_need_verify) {
1682 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1683 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1684 }
1685
1686 const unsafe_u2* const localvariable_table_start = cfs->current();
1687 assert(localvariable_table_start != nullptr, "null local variable table");
1688 if (!_need_verify) {
1689 cfs->skip_u2_fast(size);
1690 } else {
1691 cfs->guarantee_more(size * 2, CHECK_NULL);
1692 for(int i = 0; i < (*localvariable_table_length); i++) {
1693 const u2 start_pc = cfs->get_u2_fast();
1694 const u2 length = cfs->get_u2_fast();
1695 const u2 name_index = cfs->get_u2_fast();
1696 const u2 descriptor_index = cfs->get_u2_fast();
1697 const u2 index = cfs->get_u2_fast();
1698 // Assign to a u4 to avoid overflow
1699 const u4 end_pc = (u4)start_pc + (u4)length;
1700
1701 if (start_pc >= code_length) {
1702 classfile_parse_error(
1703 "Invalid start_pc %u in %s in class file %s",
1704 start_pc, tbl_name, THREAD);
1705 return nullptr;
1706 }
1707 if (end_pc > code_length) {
1708 classfile_parse_error(
1709 "Invalid length %u in %s in class file %s",
1710 length, tbl_name, THREAD);
1711 return nullptr;
1712 }
1713 const int cp_size = cp->length();
1714 guarantee_property(valid_symbol_at(name_index),
1715 "Name index %u in %s has bad constant type in class file %s",
1716 name_index, tbl_name, CHECK_NULL);
1717 guarantee_property(valid_symbol_at(descriptor_index),
1718 "Signature index %u in %s has bad constant type in class file %s",
1719 descriptor_index, tbl_name, CHECK_NULL);
1720
1721 const Symbol* const name = cp->symbol_at(name_index);
1722 const Symbol* const sig = cp->symbol_at(descriptor_index);
1723 verify_legal_field_name(name, CHECK_NULL);
1724 u2 extra_slot = 0;
1725 if (!isLVTT) {
1726 verify_legal_field_signature(name, sig, CHECK_NULL);
1727
1728 // 4894874: check special cases for double and long local variables
1729 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1730 sig == vmSymbols::type_signature(T_LONG)) {
1731 extra_slot = 1;
1732 }
1733 }
1734 guarantee_property((index + extra_slot) < max_locals,
1735 "Invalid index %u in %s in class file %s",
1736 index, tbl_name, CHECK_NULL);
1737 }
1738 }
1739 return localvariable_table_start;
1740 }
1741
1742 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1743 u4 code_attribute_length,
1744 TRAPS) {
1745 assert(cfs != nullptr, "invariant");
1746
1747 if (0 == code_attribute_length) {
1748 return nullptr;
1749 }
1750
1751 const u1* const stackmap_table_start = cfs->current();
1752 assert(stackmap_table_start != nullptr, "null stackmap table");
1753
1754 // check code_attribute_length
1755 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1756
1757 return stackmap_table_start;
1758 }
1759
1760 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1761 u2* const checked_exceptions_length,
1762 u4 method_attribute_length,
1763 TRAPS) {
1764 assert(cfs != nullptr, "invariant");
1765 assert(checked_exceptions_length != nullptr, "invariant");
1766
1767 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1768 *checked_exceptions_length = cfs->get_u2_fast();
1769 const unsigned int size =
1770 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1771 const unsafe_u2* const checked_exceptions_start = cfs->current();
1772 assert(checked_exceptions_start != nullptr, "null checked exceptions");
1773 if (!_need_verify) {
1774 cfs->skip_u2_fast(size);
1775 } else {
1776 // Verify each value in the checked exception table
1777 u2 checked_exception;
1778 const u2 len = *checked_exceptions_length;
1779 cfs->guarantee_more(2 * len, CHECK_NULL);
1780 for (int i = 0; i < len; i++) {
1781 checked_exception = cfs->get_u2_fast();
1782 guarantee_property(
1783 valid_klass_reference_at(checked_exception),
1784 "Exception name has bad type at constant pool %u in class file %s",
1785 checked_exception, CHECK_NULL);
1786 }
1787 }
1788 // check exceptions attribute length
1789 if (_need_verify) {
1790 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1791 sizeof(u2) * size),
1792 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1793 }
1794 return checked_exceptions_start;
1795 }
1796
1797 void ClassFileParser::throwIllegalSignature(const char* type,
1798 const Symbol* name,
1799 const Symbol* sig,
1800 TRAPS) const {
1801 assert(name != nullptr, "invariant");
1802 assert(sig != nullptr, "invariant");
1803
1804 ResourceMark rm(THREAD);
1805 // Names are all known to be < 64k so we know this formatted message is not excessively large.
1806 Exceptions::fthrow(THREAD_AND_LOCATION,
1807 vmSymbols::java_lang_ClassFormatError(),
1808 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1809 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1810 }
1811
1812 AnnotationCollector::ID
1813 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1814 const Symbol* name,
1815 const bool can_access_vm_annotations) {
1816 const vmSymbolID sid = vmSymbols::find_sid(name);
1817 // Privileged code can use all annotations. Other code silently drops some.
1818 const bool privileged = loader_data->is_boot_class_loader_data() ||
1819 loader_data->is_platform_class_loader_data() ||
1820 can_access_vm_annotations;
1821 switch (sid) {
1822 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1823 if (_location != _in_method) break; // only allow for methods
1824 if (!privileged) break; // only allow in privileged code
1825 return _method_CallerSensitive;
1826 }
1827 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1828 if (_location != _in_method) break; // only allow for methods
1829 if (!privileged) break; // only allow in privileged code
1830 return _method_ForceInline;
1831 }
1832 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1833 if (_location != _in_method) break; // only allow for methods
1834 if (!privileged) break; // only allow in privileged code
1835 return _method_DontInline;
1836 }
1837 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ChangesCurrentThread_signature): {
1838 if (_location != _in_method) break; // only allow for methods
1839 if (!privileged) break; // only allow in privileged code
1840 return _method_ChangesCurrentThread;
1841 }
1842 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiHideEvents_signature): {
1843 if (_location != _in_method) break; // only allow for methods
1844 if (!privileged) break; // only allow in privileged code
1845 return _method_JvmtiHideEvents;
1846 }
1847 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiMountTransition_signature): {
1848 if (_location != _in_method) break; // only allow for methods
1849 if (!privileged) break; // only allow in privileged code
1850 return _method_JvmtiMountTransition;
1851 }
1852 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1853 if (_location != _in_method) break; // only allow for methods
1854 if (!privileged) break; // only allow in privileged code
1855 return _method_InjectedProfile;
1856 }
1857 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1858 if (_location != _in_method) break; // only allow for methods
1859 if (!privileged) break; // only allow in privileged code
1860 return _method_LambdaForm_Compiled;
1861 }
1862 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
1863 if (_location != _in_method) break; // only allow for methods
1864 if (!privileged) break; // only allow in privileged code
1865 return _method_Hidden;
1866 }
1867 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
1868 if (_location != _in_method) break; // only allow for methods
1869 if (!privileged) break; // only allow in privileged code
1870 return _method_Scoped;
1871 }
1872 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
1873 if (_location != _in_method) break; // only allow for methods
1874 if (!privileged) break; // only allow in privileged code
1875 return _method_IntrinsicCandidate;
1876 }
1877 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
1878 if (_location != _in_field) break; // only allow for fields
1879 if (!privileged) break; // only allow in privileged code
1880 return _field_Stable;
1881 }
1882 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
1883 if (_location != _in_field && _location != _in_class) {
1884 break; // only allow for fields and classes
1885 }
1886 if (!EnableContended || (RestrictContended && !privileged)) {
1887 break; // honor privileges
1888 }
1889 return _jdk_internal_vm_annotation_Contended;
1890 }
1891 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
1892 if (_location != _in_method) break; // only allow for methods
1893 if (RestrictReservedStack && !privileged) break; // honor privileges
1894 return _jdk_internal_vm_annotation_ReservedStackAccess;
1895 }
1896 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
1897 if (_location != _in_class) break; // only allow for classes
1898 if (!privileged) break; // only allow in privileged code
1899 return _jdk_internal_ValueBased;
1900 }
1901 case VM_SYMBOL_ENUM_NAME(java_lang_Deprecated): {
1902 return _java_lang_Deprecated;
1903 }
1904 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_AOTSafeClassInitializer_signature): {
1905 if (_location != _in_class) break; // only allow for classes
1906 if (!privileged) break; // only allow in privileged code
1907 return _jdk_internal_vm_annotation_AOTSafeClassInitializer;
1908 }
1909 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_AOTRuntimeSetup_signature): {
1910 if (_location != _in_method) break; // only allow for methods
1911 if (!privileged) break; // only allow in privileged code
1912 return _method_AOTRuntimeSetup;
1913 }
1914 default: {
1915 break;
1916 }
1917 }
1918 return AnnotationCollector::_unknown;
1919 }
1920
1921 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1922 if (is_contended())
1923 // Setting the contended group also sets the contended bit in field flags
1924 f->set_contended_group(contended_group());
1925 if (is_stable())
1926 (f->field_flags_addr())->update_stable(true);
1927 }
1928
1929 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
1930 // If there's an error deallocate metadata for field annotations
1931 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
1932 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
1933 }
1934
1935 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
1936 if (has_annotation(_method_CallerSensitive))
1937 m->set_caller_sensitive();
1938 if (has_annotation(_method_ForceInline))
1939 m->set_force_inline();
1940 if (has_annotation(_method_DontInline))
1941 m->set_dont_inline();
1942 if (has_annotation(_method_ChangesCurrentThread))
1943 m->set_changes_current_thread();
1944 if (has_annotation(_method_JvmtiHideEvents))
1945 m->set_jvmti_hide_events();
1946 if (has_annotation(_method_JvmtiMountTransition))
1947 m->set_jvmti_mount_transition();
1948 if (has_annotation(_method_InjectedProfile))
1949 m->set_has_injected_profile();
1950 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1951 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1952 if (has_annotation(_method_Hidden))
1953 m->set_is_hidden();
1954 if (has_annotation(_method_Scoped))
1955 m->set_scoped();
1956 if (has_annotation(_method_IntrinsicCandidate) && !m->is_synthetic())
1957 m->set_intrinsic_candidate();
1958 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
1959 m->set_has_reserved_stack_access();
1960 if (has_annotation(_java_lang_Deprecated))
1961 m->set_deprecated();
1962 if (has_annotation(_java_lang_Deprecated_for_removal))
1963 m->set_deprecated_for_removal();
1964 }
1965
1966 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
1967 assert(ik != nullptr, "invariant");
1968 if (has_annotation(_jdk_internal_vm_annotation_Contended)) {
1969 ik->set_is_contended(is_contended());
1970 }
1971 if (has_annotation(_jdk_internal_ValueBased)) {
1972 ik->set_has_value_based_class_annotation();
1973 if (DiagnoseSyncOnValueBasedClasses) {
1974 ik->set_is_value_based();
1975 }
1976 }
1977 if (has_annotation(_java_lang_Deprecated)) {
1978 Array<Method*>* methods = ik->methods();
1979 int length = ik->methods()->length();
1980 for (int i = 0; i < length; i++) {
1981 Method* m = methods->at(i);
1982 m->set_deprecated();
1983 }
1984 }
1985 if (has_annotation(_java_lang_Deprecated_for_removal)) {
1986 Array<Method*>* methods = ik->methods();
1987 int length = ik->methods()->length();
1988 for (int i = 0; i < length; i++) {
1989 Method* m = methods->at(i);
1990 m->set_deprecated_for_removal();
1991 }
1992 }
1993 if (has_annotation(_jdk_internal_vm_annotation_AOTSafeClassInitializer)) {
1994 ik->set_has_aot_safe_initializer();
1995 }
1996 }
1997
1998 #define MAX_ARGS_SIZE 255
1999 #define MAX_CODE_SIZE 65535
2000 #define INITIAL_MAX_LVT_NUMBER 256
2001
2002 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2003 *
2004 * Rules for LVT's and LVTT's are:
2005 * - There can be any number of LVT's and LVTT's.
2006 * - If there are n LVT's, it is the same as if there was just
2007 * one LVT containing all the entries from the n LVT's.
2008 * - There may be no more than one LVT entry per local variable.
2009 * Two LVT entries are 'equal' if these fields are the same:
2010 * start_pc, length, name, slot
2011 * - There may be no more than one LVTT entry per each LVT entry.
2012 * Each LVTT entry has to match some LVT entry.
2013 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2014 */
2015 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2016 int lvt_cnt,
2017 u2* const localvariable_table_length,
2018 const unsafe_u2** const localvariable_table_start,
2019 int lvtt_cnt,
2020 u2* const localvariable_type_table_length,
2021 const unsafe_u2** const localvariable_type_table_start,
2022 TRAPS) {
2023
2024 ResourceMark rm(THREAD);
2025
2026 typedef HashTable<LocalVariableTableElement, LocalVariableTableElement*,
2027 256, AnyObj::RESOURCE_AREA, mtInternal,
2028 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2029
2030 LVT_HashTable* const table = new LVT_HashTable();
2031
2032 // To fill LocalVariableTable in
2033 const Classfile_LVT_Element* cf_lvt;
2034 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2035
2036 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2037 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2038 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2039 copy_lvt_element(&cf_lvt[idx], lvt);
2040 // If no duplicates, add LVT elem in hashtable.
2041 if (table->put(*lvt, lvt) == false
2042 && _need_verify
2043 && _major_version >= JAVA_1_5_VERSION) {
2044 classfile_parse_error("Duplicated LocalVariableTable attribute "
2045 "entry for '%s' in class file %s",
2046 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2047 THREAD);
2048 return;
2049 }
2050 }
2051 }
2052
2053 // To merge LocalVariableTable and LocalVariableTypeTable
2054 const Classfile_LVT_Element* cf_lvtt;
2055 LocalVariableTableElement lvtt_elem;
2056
2057 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2058 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2059 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2060 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2061 LocalVariableTableElement** entry = table->get(lvtt_elem);
2062 if (entry == nullptr) {
2063 if (_need_verify) {
2064 classfile_parse_error("LVTT entry for '%s' in class file %s "
2065 "does not match any LVT entry",
2066 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2067 THREAD);
2068 return;
2069 }
2070 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2071 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2072 "entry for '%s' in class file %s",
2073 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2074 THREAD);
2075 return;
2076 } else {
2077 // to add generic signatures into LocalVariableTable
2078 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2079 }
2080 }
2081 }
2082 }
2083
2084
2085 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2086 const u1* runtime_visible_annotations,
2087 int runtime_visible_annotations_length,
2088 const u1* runtime_visible_parameter_annotations,
2089 int runtime_visible_parameter_annotations_length,
2090 const u1* runtime_visible_type_annotations,
2091 int runtime_visible_type_annotations_length,
2092 const u1* annotation_default,
2093 int annotation_default_length,
2094 TRAPS) {
2095
2096 AnnotationArray* a;
2097
2098 if (runtime_visible_annotations_length > 0) {
2099 a = allocate_annotations(runtime_visible_annotations,
2100 runtime_visible_annotations_length,
2101 CHECK);
2102 cm->set_method_annotations(a);
2103 }
2104
2105 if (runtime_visible_parameter_annotations_length > 0) {
2106 a = allocate_annotations(runtime_visible_parameter_annotations,
2107 runtime_visible_parameter_annotations_length,
2108 CHECK);
2109 cm->set_parameter_annotations(a);
2110 }
2111
2112 if (annotation_default_length > 0) {
2113 a = allocate_annotations(annotation_default,
2114 annotation_default_length,
2115 CHECK);
2116 cm->set_default_annotations(a);
2117 }
2118
2119 if (runtime_visible_type_annotations_length > 0) {
2120 a = allocate_annotations(runtime_visible_type_annotations,
2121 runtime_visible_type_annotations_length,
2122 CHECK);
2123 cm->set_type_annotations(a);
2124 }
2125 }
2126
2127
2128 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2129 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2130 // Method* to save footprint, so we only know the size of the resulting Method* when the
2131 // entire method attribute is parsed.
2132 //
2133 // The has_localvariable_table parameter is used to pass up the value to InstanceKlass.
2134
2135 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2136 bool is_interface,
2137 const ConstantPool* cp,
2138 bool* const has_localvariable_table,
2139 TRAPS) {
2140 assert(cfs != nullptr, "invariant");
2141 assert(cp != nullptr, "invariant");
2142 assert(has_localvariable_table != nullptr, "invariant");
2143
2144 ResourceMark rm(THREAD);
2145 // Parse fixed parts:
2146 // access_flags, name_index, descriptor_index, attributes_count
2147 cfs->guarantee_more(8, CHECK_NULL);
2148
2149 u2 flags = cfs->get_u2_fast();
2150 const u2 name_index = cfs->get_u2_fast();
2151 const int cp_size = cp->length();
2152 guarantee_property(
2153 valid_symbol_at(name_index),
2154 "Illegal constant pool index %u for method name in class file %s",
2155 name_index, CHECK_NULL);
2156 const Symbol* const name = cp->symbol_at(name_index);
2157 verify_legal_method_name(name, CHECK_NULL);
2158
2159 const u2 signature_index = cfs->get_u2_fast();
2160 guarantee_property(
2161 valid_symbol_at(signature_index),
2162 "Illegal constant pool index %u for method signature in class file %s",
2163 signature_index, CHECK_NULL);
2164 const Symbol* const signature = cp->symbol_at(signature_index);
2165
2166 if (name == vmSymbols::class_initializer_name()) {
2167 // We ignore the other access flags for a valid class initializer.
2168 // (JVM Spec 2nd ed., chapter 4.6)
2169 if (_major_version < 51) { // backward compatibility
2170 flags = JVM_ACC_STATIC;
2171 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2172 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2173 } else {
2174 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2175 return nullptr;
2176 }
2177 } else {
2178 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2179 }
2180
2181 if (name == vmSymbols::object_initializer_name() && is_interface) {
2182 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2183 return nullptr;
2184 }
2185
2186 int args_size = -1; // only used when _need_verify is true
2187 if (_need_verify) {
2188 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2189 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2190 verify_legal_method_signature(name, signature, CHECK_NULL);
2191 if (args_size > MAX_ARGS_SIZE) {
2192 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2193 return nullptr;
2194 }
2195 }
2196
2197 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2198
2199 // Default values for code and exceptions attribute elements
2200 u2 max_stack = 0;
2201 u2 max_locals = 0;
2202 u4 code_length = 0;
2203 const u1* code_start = nullptr;
2204 u2 exception_table_length = 0;
2205 const unsafe_u2* exception_table_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2206 Array<int>* exception_handlers = Universe::the_empty_int_array();
2207 u2 checked_exceptions_length = 0;
2208 const unsafe_u2* checked_exceptions_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2209 CompressedLineNumberWriteStream* linenumber_table = nullptr;
2210 int linenumber_table_length = 0;
2211 int total_lvt_length = 0;
2212 u2 lvt_cnt = 0;
2213 u2 lvtt_cnt = 0;
2214 bool lvt_allocated = false;
2215 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2216 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2217 u2* localvariable_table_length = nullptr;
2218 const unsafe_u2** localvariable_table_start = nullptr; // (potentially unaligned) pointer to array of LVT attributes
2219 u2* localvariable_type_table_length = nullptr;
2220 const unsafe_u2** localvariable_type_table_start = nullptr; // (potentially unaligned) pointer to LVTT attributes
2221 int method_parameters_length = -1;
2222 const u1* method_parameters_data = nullptr;
2223 bool method_parameters_seen = false;
2224 bool parsed_code_attribute = false;
2225 bool parsed_checked_exceptions_attribute = false;
2226 bool parsed_stackmap_attribute = false;
2227 // stackmap attribute - JDK1.5
2228 const u1* stackmap_data = nullptr;
2229 int stackmap_data_length = 0;
2230 u2 generic_signature_index = 0;
2231 MethodAnnotationCollector parsed_annotations;
2232 const u1* runtime_visible_annotations = nullptr;
2233 int runtime_visible_annotations_length = 0;
2234 const u1* runtime_visible_parameter_annotations = nullptr;
2235 int runtime_visible_parameter_annotations_length = 0;
2236 const u1* runtime_visible_type_annotations = nullptr;
2237 int runtime_visible_type_annotations_length = 0;
2238 bool runtime_invisible_annotations_exists = false;
2239 bool runtime_invisible_type_annotations_exists = false;
2240 bool runtime_invisible_parameter_annotations_exists = false;
2241 const u1* annotation_default = nullptr;
2242 int annotation_default_length = 0;
2243
2244 // Parse code and exceptions attribute
2245 u2 method_attributes_count = cfs->get_u2_fast();
2246 while (method_attributes_count--) {
2247 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2248 const u2 method_attribute_name_index = cfs->get_u2_fast();
2249 const u4 method_attribute_length = cfs->get_u4_fast();
2250 guarantee_property(
2251 valid_symbol_at(method_attribute_name_index),
2252 "Invalid method attribute name index %u in class file %s",
2253 method_attribute_name_index, CHECK_NULL);
2254
2255 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2256 if (method_attribute_name == vmSymbols::tag_code()) {
2257 // Parse Code attribute
2258 if (_need_verify) {
2259 guarantee_property(
2260 !access_flags.is_native() && !access_flags.is_abstract(),
2261 "Code attribute in native or abstract methods in class file %s",
2262 CHECK_NULL);
2263 }
2264 if (parsed_code_attribute) {
2265 classfile_parse_error("Multiple Code attributes in class file %s",
2266 THREAD);
2267 return nullptr;
2268 }
2269 parsed_code_attribute = true;
2270
2271 // Stack size, locals size, and code size
2272 cfs->guarantee_more(8, CHECK_NULL);
2273 max_stack = cfs->get_u2_fast();
2274 max_locals = cfs->get_u2_fast();
2275 code_length = cfs->get_u4_fast();
2276 if (_need_verify) {
2277 guarantee_property(args_size <= max_locals,
2278 "Arguments can't fit into locals in class file %s",
2279 CHECK_NULL);
2280 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2281 "Invalid method Code length %u in class file %s",
2282 code_length, CHECK_NULL);
2283 }
2284 // Code pointer
2285 code_start = cfs->current();
2286 assert(code_start != nullptr, "null code start");
2287 cfs->guarantee_more(code_length, CHECK_NULL);
2288 cfs->skip_u1_fast(code_length);
2289
2290 // Exception handler table
2291 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2292 exception_table_length = cfs->get_u2_fast();
2293 if (exception_table_length > 0) {
2294 exception_table_start = parse_exception_table(cfs,
2295 code_length,
2296 exception_table_length,
2297 CHECK_NULL);
2298 }
2299
2300 // Parse additional attributes in code attribute
2301 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2302 u2 code_attributes_count = cfs->get_u2_fast();
2303
2304 unsigned int calculated_attribute_length = 0;
2305
2306 calculated_attribute_length =
2307 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2308 calculated_attribute_length += checked_cast<unsigned int>(
2309 code_length +
2310 sizeof(exception_table_length) +
2311 sizeof(code_attributes_count) +
2312 exception_table_length *
2313 ( sizeof(u2) + // start_pc
2314 sizeof(u2) + // end_pc
2315 sizeof(u2) + // handler_pc
2316 sizeof(u2) )); // catch_type_index
2317
2318 while (code_attributes_count--) {
2319 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2320 const u2 code_attribute_name_index = cfs->get_u2_fast();
2321 const u4 code_attribute_length = cfs->get_u4_fast();
2322 calculated_attribute_length += code_attribute_length +
2323 (unsigned)sizeof(code_attribute_name_index) +
2324 (unsigned)sizeof(code_attribute_length);
2325 guarantee_property(valid_symbol_at(code_attribute_name_index),
2326 "Invalid code attribute name index %u in class file %s",
2327 code_attribute_name_index,
2328 CHECK_NULL);
2329 if (LoadLineNumberTables &&
2330 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2331 // Parse and compress line number table
2332 parse_linenumber_table(code_attribute_length,
2333 code_length,
2334 &linenumber_table,
2335 CHECK_NULL);
2336
2337 } else if (LoadLocalVariableTables &&
2338 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2339 // Parse local variable table
2340 if (!lvt_allocated) {
2341 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2342 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2343 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2344 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2345 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2346 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2347 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2348 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2349 lvt_allocated = true;
2350 }
2351 if (lvt_cnt == max_lvt_cnt) {
2352 max_lvt_cnt <<= 1;
2353 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2354 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2355 }
2356 localvariable_table_start[lvt_cnt] =
2357 parse_localvariable_table(cfs,
2358 code_length,
2359 max_locals,
2360 code_attribute_length,
2361 &localvariable_table_length[lvt_cnt],
2362 false, // is not LVTT
2363 CHECK_NULL);
2364 total_lvt_length += localvariable_table_length[lvt_cnt];
2365 lvt_cnt++;
2366 } else if (LoadLocalVariableTypeTables &&
2367 _major_version >= JAVA_1_5_VERSION &&
2368 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2369 if (!lvt_allocated) {
2370 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2371 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2372 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2373 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2374 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2375 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2376 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2377 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2378 lvt_allocated = true;
2379 }
2380 // Parse local variable type table
2381 if (lvtt_cnt == max_lvtt_cnt) {
2382 max_lvtt_cnt <<= 1;
2383 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2384 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2385 }
2386 localvariable_type_table_start[lvtt_cnt] =
2387 parse_localvariable_table(cfs,
2388 code_length,
2389 max_locals,
2390 code_attribute_length,
2391 &localvariable_type_table_length[lvtt_cnt],
2392 true, // is LVTT
2393 CHECK_NULL);
2394 lvtt_cnt++;
2395 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2396 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2397 // Stack map is only needed by the new verifier in JDK1.5.
2398 if (parsed_stackmap_attribute) {
2399 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2400 return nullptr;
2401 }
2402 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, CHECK_NULL);
2403 stackmap_data_length = code_attribute_length;
2404 parsed_stackmap_attribute = true;
2405 } else {
2406 // Skip unknown attributes
2407 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2408 }
2409 }
2410 // check method attribute length
2411 if (_need_verify) {
2412 guarantee_property(method_attribute_length == calculated_attribute_length,
2413 "Code segment has wrong length in class file %s",
2414 CHECK_NULL);
2415 }
2416 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2417 // Parse Exceptions attribute
2418 if (parsed_checked_exceptions_attribute) {
2419 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2420 THREAD);
2421 return nullptr;
2422 }
2423 parsed_checked_exceptions_attribute = true;
2424 checked_exceptions_start =
2425 parse_checked_exceptions(cfs,
2426 &checked_exceptions_length,
2427 method_attribute_length,
2428 CHECK_NULL);
2429 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2430 // reject multiple method parameters
2431 if (method_parameters_seen) {
2432 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2433 THREAD);
2434 return nullptr;
2435 }
2436 method_parameters_seen = true;
2437 method_parameters_length = cfs->get_u1_fast();
2438 const u4 real_length = (method_parameters_length * 4u) + 1u;
2439 if (method_attribute_length != real_length) {
2440 classfile_parse_error(
2441 "Invalid MethodParameters method attribute length %u in class file",
2442 method_attribute_length, THREAD);
2443 return nullptr;
2444 }
2445 method_parameters_data = cfs->current();
2446 cfs->skip_u2_fast(method_parameters_length);
2447 cfs->skip_u2_fast(method_parameters_length);
2448 // ignore this attribute if it cannot be reflected
2449 if (!vmClasses::reflect_Parameter_klass_is_loaded())
2450 method_parameters_length = -1;
2451 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2452 if (method_attribute_length != 0) {
2453 classfile_parse_error(
2454 "Invalid Synthetic method attribute length %u in class file %s",
2455 method_attribute_length, THREAD);
2456 return nullptr;
2457 }
2458 // Should we check that there hasn't already been a synthetic attribute?
2459 access_flags.set_is_synthetic();
2460 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2461 if (method_attribute_length != 0) {
2462 classfile_parse_error(
2463 "Invalid Deprecated method attribute length %u in class file %s",
2464 method_attribute_length, THREAD);
2465 return nullptr;
2466 }
2467 } else if (_major_version >= JAVA_1_5_VERSION) {
2468 if (method_attribute_name == vmSymbols::tag_signature()) {
2469 if (generic_signature_index != 0) {
2470 classfile_parse_error(
2471 "Multiple Signature attributes for method in class file %s",
2472 THREAD);
2473 return nullptr;
2474 }
2475 if (method_attribute_length != 2) {
2476 classfile_parse_error(
2477 "Invalid Signature attribute length %u in class file %s",
2478 method_attribute_length, THREAD);
2479 return nullptr;
2480 }
2481 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2482 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2483 if (runtime_visible_annotations != nullptr) {
2484 classfile_parse_error(
2485 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2486 THREAD);
2487 return nullptr;
2488 }
2489 runtime_visible_annotations_length = method_attribute_length;
2490 runtime_visible_annotations = cfs->current();
2491 assert(runtime_visible_annotations != nullptr, "null visible annotations");
2492 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2493 parse_annotations(cp,
2494 runtime_visible_annotations,
2495 runtime_visible_annotations_length,
2496 &parsed_annotations,
2497 _loader_data,
2498 _can_access_vm_annotations);
2499 cfs->skip_u1_fast(runtime_visible_annotations_length);
2500 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2501 if (runtime_invisible_annotations_exists) {
2502 classfile_parse_error(
2503 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2504 THREAD);
2505 return nullptr;
2506 }
2507 runtime_invisible_annotations_exists = true;
2508 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2509 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2510 if (runtime_visible_parameter_annotations != nullptr) {
2511 classfile_parse_error(
2512 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2513 THREAD);
2514 return nullptr;
2515 }
2516 runtime_visible_parameter_annotations_length = method_attribute_length;
2517 runtime_visible_parameter_annotations = cfs->current();
2518 assert(runtime_visible_parameter_annotations != nullptr, "null visible parameter annotations");
2519 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2520 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2521 if (runtime_invisible_parameter_annotations_exists) {
2522 classfile_parse_error(
2523 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2524 THREAD);
2525 return nullptr;
2526 }
2527 runtime_invisible_parameter_annotations_exists = true;
2528 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2529 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2530 if (annotation_default != nullptr) {
2531 classfile_parse_error(
2532 "Multiple AnnotationDefault attributes for method in class file %s",
2533 THREAD);
2534 return nullptr;
2535 }
2536 annotation_default_length = method_attribute_length;
2537 annotation_default = cfs->current();
2538 assert(annotation_default != nullptr, "null annotation default");
2539 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2540 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2541 if (runtime_visible_type_annotations != nullptr) {
2542 classfile_parse_error(
2543 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2544 THREAD);
2545 return nullptr;
2546 }
2547 runtime_visible_type_annotations_length = method_attribute_length;
2548 runtime_visible_type_annotations = cfs->current();
2549 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
2550 // No need for the VM to parse Type annotations
2551 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2552 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2553 if (runtime_invisible_type_annotations_exists) {
2554 classfile_parse_error(
2555 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2556 THREAD);
2557 return nullptr;
2558 }
2559 runtime_invisible_type_annotations_exists = true;
2560 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2561 } else {
2562 // Skip unknown attributes
2563 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2564 }
2565 } else {
2566 // Skip unknown attributes
2567 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2568 }
2569 }
2570
2571 if (linenumber_table != nullptr) {
2572 linenumber_table->write_terminator();
2573 linenumber_table_length = linenumber_table->position();
2574 }
2575
2576 // Make sure there's at least one Code attribute in non-native/non-abstract method
2577 if (_need_verify) {
2578 guarantee_property(access_flags.is_native() ||
2579 access_flags.is_abstract() ||
2580 parsed_code_attribute,
2581 "Absent Code attribute in method that is not native or abstract in class file %s",
2582 CHECK_NULL);
2583 }
2584
2585 // All sizing information for a Method* is finally available, now create it
2586 InlineTableSizes sizes(
2587 total_lvt_length,
2588 linenumber_table_length,
2589 exception_table_length,
2590 checked_exceptions_length,
2591 method_parameters_length,
2592 generic_signature_index,
2593 runtime_visible_annotations_length,
2594 runtime_visible_parameter_annotations_length,
2595 runtime_visible_type_annotations_length,
2596 annotation_default_length,
2597 0);
2598
2599 Method* const m = Method::allocate(_loader_data,
2600 code_length,
2601 access_flags,
2602 &sizes,
2603 ConstMethod::NORMAL,
2604 _cp->symbol_at(name_index),
2605 CHECK_NULL);
2606
2607 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2608
2609 // Fill in information from fixed part (access_flags already set)
2610 m->set_constants(_cp);
2611 m->set_name_index(name_index);
2612 m->set_signature_index(signature_index);
2613 m->constMethod()->compute_from_signature(cp->symbol_at(signature_index), access_flags.is_static());
2614 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2615
2616 // Fill in code attribute information
2617 m->set_max_stack(max_stack);
2618 m->set_max_locals(max_locals);
2619 if (stackmap_data != nullptr) {
2620 m->constMethod()->copy_stackmap_data(_loader_data,
2621 (u1*)stackmap_data,
2622 stackmap_data_length,
2623 CHECK_NULL);
2624 }
2625
2626 // Copy byte codes
2627 m->set_code((u1*)code_start);
2628
2629 // Copy line number table
2630 if (linenumber_table != nullptr) {
2631 memcpy(m->compressed_linenumber_table(),
2632 linenumber_table->buffer(),
2633 linenumber_table_length);
2634 }
2635
2636 // Copy exception table
2637 if (exception_table_length > 0) {
2638 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2639 m->exception_table_start(),
2640 exception_table_length * sizeof(ExceptionTableElement),
2641 sizeof(u2));
2642 }
2643
2644 // Copy method parameters
2645 if (method_parameters_length > 0) {
2646 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2647 for (int i = 0; i < method_parameters_length; i++) {
2648 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2649 method_parameters_data += 2;
2650 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2651 method_parameters_data += 2;
2652 }
2653 }
2654
2655 // Copy checked exceptions
2656 if (checked_exceptions_length > 0) {
2657 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2658 m->checked_exceptions_start(),
2659 checked_exceptions_length * sizeof(CheckedExceptionElement),
2660 sizeof(u2));
2661 }
2662
2663 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2664 if (total_lvt_length > 0) {
2665 *has_localvariable_table = true;
2666 copy_localvariable_table(m->constMethod(),
2667 lvt_cnt,
2668 localvariable_table_length,
2669 localvariable_table_start,
2670 lvtt_cnt,
2671 localvariable_type_table_length,
2672 localvariable_type_table_start,
2673 CHECK_NULL);
2674 }
2675
2676 if (parsed_annotations.has_any_annotations())
2677 parsed_annotations.apply_to(methodHandle(THREAD, m));
2678
2679 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2680 m->set_is_hidden();
2681 }
2682 if (parsed_annotations.has_aot_runtime_setup()) {
2683 if (name != vmSymbols::runtimeSetup() || signature != vmSymbols::void_method_signature() ||
2684 !access_flags.is_private() || !access_flags.is_static()) {
2685 classfile_parse_error("@AOTRuntimeSetup method must be declared private static void runtimeSetup() for class %s", CHECK_NULL);
2686 }
2687 _has_aot_runtime_setup_method = true;
2688 }
2689
2690 // Copy annotations
2691 copy_method_annotations(m->constMethod(),
2692 runtime_visible_annotations,
2693 runtime_visible_annotations_length,
2694 runtime_visible_parameter_annotations,
2695 runtime_visible_parameter_annotations_length,
2696 runtime_visible_type_annotations,
2697 runtime_visible_type_annotations_length,
2698 annotation_default,
2699 annotation_default_length,
2700 CHECK_NULL);
2701
2702 if (InstanceKlass::is_finalization_enabled() &&
2703 name == vmSymbols::finalize_method_name() &&
2704 signature == vmSymbols::void_method_signature()) {
2705 if (m->is_empty_method()) {
2706 _has_empty_finalizer = true;
2707 } else {
2708 _has_finalizer = true;
2709 }
2710 }
2711
2712 NOT_PRODUCT(m->verify());
2713 return m;
2714 }
2715
2716
2717 // Side-effects: populates the _methods field in the parser
2718 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2719 bool is_interface,
2720 bool* const has_localvariable_table,
2721 bool* has_final_method,
2722 bool* declares_nonstatic_concrete_methods,
2723 TRAPS) {
2724 assert(cfs != nullptr, "invariant");
2725 assert(has_localvariable_table != nullptr, "invariant");
2726 assert(has_final_method != nullptr, "invariant");
2727 assert(declares_nonstatic_concrete_methods != nullptr, "invariant");
2728
2729 assert(nullptr == _methods, "invariant");
2730
2731 cfs->guarantee_more(2, CHECK); // length
2732 const u2 length = cfs->get_u2_fast();
2733 if (length == 0) {
2734 _methods = Universe::the_empty_method_array();
2735 } else {
2736 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2737 length,
2738 nullptr,
2739 CHECK);
2740
2741 for (int index = 0; index < length; index++) {
2742 Method* method = parse_method(cfs,
2743 is_interface,
2744 _cp,
2745 has_localvariable_table,
2746 CHECK);
2747
2748 if (method->is_final()) {
2749 *has_final_method = true;
2750 }
2751 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2752 // used for interface initialization, and default method inheritance analysis
2753 if (is_interface && !(*declares_nonstatic_concrete_methods)
2754 && !method->is_abstract() && !method->is_static()) {
2755 *declares_nonstatic_concrete_methods = true;
2756 }
2757 _methods->at_put(index, method);
2758 }
2759
2760 if (_need_verify && length > 1) {
2761 // Check duplicated methods
2762 ResourceMark rm(THREAD);
2763 // Set containing name-signature pairs
2764 NameSigHashtable* names_and_sigs = new NameSigHashtable();
2765 for (int i = 0; i < length; i++) {
2766 const Method* const m = _methods->at(i);
2767 NameSigHash name_and_sig(m->name(), m->signature());
2768 // If no duplicates, add name/signature in hashtable names_and_sigs.
2769 if(!names_and_sigs->put(name_and_sig, 0)) {
2770 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2771 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
2772 return;
2773 }
2774 }
2775 }
2776 }
2777 }
2778
2779 static const intArray* sort_methods(Array<Method*>* methods) {
2780 const int length = methods->length();
2781 // If JVMTI original method ordering or sharing is enabled we have to
2782 // remember the original class file ordering.
2783 // We temporarily use the vtable_index field in the Method* to store the
2784 // class file index, so we can read in after calling qsort.
2785 // Put the method ordering in the shared archive.
2786 if (JvmtiExport::can_maintain_original_method_order() || CDSConfig::is_dumping_archive()) {
2787 for (int index = 0; index < length; index++) {
2788 Method* const m = methods->at(index);
2789 assert(!m->valid_vtable_index(), "vtable index should not be set");
2790 m->set_vtable_index(index);
2791 }
2792 }
2793 // Sort method array by ascending method name (for faster lookups & vtable construction)
2794 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2795 Method::sort_methods(methods);
2796
2797 intArray* method_ordering = nullptr;
2798 // If JVMTI original method ordering or sharing is enabled construct int
2799 // array remembering the original ordering
2800 if (JvmtiExport::can_maintain_original_method_order() || CDSConfig::is_dumping_archive()) {
2801 method_ordering = new intArray(length, length, -1);
2802 for (int index = 0; index < length; index++) {
2803 Method* const m = methods->at(index);
2804 const int old_index = m->vtable_index();
2805 assert(old_index >= 0 && old_index < length, "invalid method index");
2806 method_ordering->at_put(index, old_index);
2807 m->set_vtable_index(Method::invalid_vtable_index);
2808 }
2809 }
2810 return method_ordering;
2811 }
2812
2813 // Parse generic_signature attribute for methods and fields
2814 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2815 TRAPS) {
2816 assert(cfs != nullptr, "invariant");
2817
2818 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2819 const u2 generic_signature_index = cfs->get_u2_fast();
2820 guarantee_property(
2821 valid_symbol_at(generic_signature_index),
2822 "Invalid Signature attribute at constant pool index %u in class file %s",
2823 generic_signature_index, CHECK_0);
2824 return generic_signature_index;
2825 }
2826
2827 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2828 TRAPS) {
2829
2830 assert(cfs != nullptr, "invariant");
2831
2832 cfs->guarantee_more(2, CHECK); // sourcefile_index
2833 const u2 sourcefile_index = cfs->get_u2_fast();
2834 guarantee_property(
2835 valid_symbol_at(sourcefile_index),
2836 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2837 sourcefile_index, CHECK);
2838 set_class_sourcefile_index(sourcefile_index);
2839 }
2840
2841 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2842 int length,
2843 TRAPS) {
2844 assert(cfs != nullptr, "invariant");
2845
2846 const u1* const sde_buffer = cfs->current();
2847 assert(sde_buffer != nullptr, "null sde buffer");
2848
2849 // Don't bother storing it if there is no way to retrieve it
2850 if (JvmtiExport::can_get_source_debug_extension()) {
2851 assert((length+1) > length, "Overflow checking");
2852 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2853 for (int i = 0; i < length; i++) {
2854 sde[i] = sde_buffer[i];
2855 }
2856 sde[length] = '\0';
2857 set_class_sde_buffer((const char*)sde, length);
2858 }
2859 // Got utf8 string, set stream position forward
2860 cfs->skip_u1(length, CHECK);
2861 }
2862
2863
2864 // Inner classes can be static, private or protected (classic VM does this)
2865 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2866 JVM_ACC_PRIVATE | \
2867 JVM_ACC_PROTECTED | \
2868 JVM_ACC_STATIC \
2869 )
2870
2871 // Find index of the InnerClasses entry for the specified inner_class_info_index.
2872 // Return -1 if none is found.
2873 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
2874 Symbol* cp_klass_name = cp->klass_name_at(inner);
2875 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
2876 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
2877 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
2878 return idx;
2879 }
2880 }
2881 return -1;
2882 }
2883
2884 // Return the outer_class_info_index for the InnerClasses entry containing the
2885 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
2886 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
2887 if (inner == 0) return -1;
2888 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
2889 if (idx == -1) return -1;
2890 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
2891 return result;
2892 }
2893
2894 // Return true if circularity is found, false if no circularity is found.
2895 // Use Floyd's cycle finding algorithm.
2896 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
2897 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
2898 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
2899
2900 while (fast != -1 && fast != 0) {
2901 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
2902 return true; // found a circularity
2903 }
2904 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
2905 if (fast == -1) return false;
2906 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
2907 if (fast == -1) return false;
2908 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
2909 assert(slow != -1, "sanity check");
2910 }
2911 return false;
2912 }
2913
2914 // Loop through each InnerClasses entry checking for circularities and duplications
2915 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
2916 // return true if a circularity or entries with duplicate inner_class_info_indexes
2917 // are found.
2918 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
2919 // Loop through each InnerClasses entry.
2920 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
2921 // Return true if there are circular entries.
2922 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
2923 return true;
2924 }
2925 // Check if there are duplicate entries or entries with the same inner_class_info_index.
2926 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
2927 y += InstanceKlass::inner_class_next_offset) {
2928
2929 // 4347400: make sure there's no duplicate entry in the classes array
2930 if (_major_version >= JAVA_1_5_VERSION) {
2931 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
2932 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
2933 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
2934 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
2935 "Duplicate entry in InnerClasses attribute in class file %s",
2936 CHECK_(true));
2937 }
2938 // Return true if there are two entries with the same inner_class_info_index.
2939 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
2940 return true;
2941 }
2942 }
2943 }
2944 return false;
2945 }
2946
2947 // Return number of classes in the inner classes attribute table
2948 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
2949 const ConstantPool* cp,
2950 const u1* const inner_classes_attribute_start,
2951 bool parsed_enclosingmethod_attribute,
2952 u2 enclosing_method_class_index,
2953 u2 enclosing_method_method_index,
2954 TRAPS) {
2955 const u1* const current_mark = cfs->current();
2956 u2 length = 0;
2957 if (inner_classes_attribute_start != nullptr) {
2958 cfs->set_current(inner_classes_attribute_start);
2959 cfs->guarantee_more(2, CHECK_0); // length
2960 length = cfs->get_u2_fast();
2961 }
2962
2963 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2964 // method data:
2965 // [inner_class_info_index,
2966 // outer_class_info_index,
2967 // inner_name_index,
2968 // inner_class_access_flags,
2969 // ...
2970 // enclosing_method_class_index,
2971 // enclosing_method_method_index]
2972 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2973 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
2974 _inner_classes = inner_classes;
2975
2976 int index = 0;
2977 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2978 for (int n = 0; n < length; n++) {
2979 // Inner class index
2980 const u2 inner_class_info_index = cfs->get_u2_fast();
2981 guarantee_property(
2982 valid_klass_reference_at(inner_class_info_index),
2983 "inner_class_info_index %u has bad constant type in class file %s",
2984 inner_class_info_index, CHECK_0);
2985 // Outer class index
2986 const u2 outer_class_info_index = cfs->get_u2_fast();
2987 guarantee_property(
2988 outer_class_info_index == 0 ||
2989 valid_klass_reference_at(outer_class_info_index),
2990 "outer_class_info_index %u has bad constant type in class file %s",
2991 outer_class_info_index, CHECK_0);
2992
2993 if (outer_class_info_index != 0) {
2994 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
2995 char* bytes = (char*)outer_class_name->bytes();
2996 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
2997 "Outer class is an array class in class file %s", CHECK_0);
2998 }
2999 // Inner class name
3000 const u2 inner_name_index = cfs->get_u2_fast();
3001 guarantee_property(
3002 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3003 "inner_name_index %u has bad constant type in class file %s",
3004 inner_name_index, CHECK_0);
3005 if (_need_verify) {
3006 guarantee_property(inner_class_info_index != outer_class_info_index,
3007 "Class is both outer and inner class in class file %s", CHECK_0);
3008 }
3009 // Access flags
3010 u2 flags;
3011 // JVM_ACC_MODULE is defined in JDK-9 and later.
3012 if (_major_version >= JAVA_9_VERSION) {
3013 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3014 } else {
3015 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3016 }
3017 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3018 // Set abstract bit for old class files for backward compatibility
3019 flags |= JVM_ACC_ABSTRACT;
3020 }
3021
3022 Symbol* inner_name_symbol = inner_name_index == 0 ? nullptr : cp->symbol_at(inner_name_index);
3023 verify_legal_class_modifiers(flags, inner_name_symbol, inner_name_index == 0, CHECK_0);
3024 AccessFlags inner_access_flags(flags);
3025
3026 inner_classes->at_put(index++, inner_class_info_index);
3027 inner_classes->at_put(index++, outer_class_info_index);
3028 inner_classes->at_put(index++, inner_name_index);
3029 inner_classes->at_put(index++, inner_access_flags.as_unsigned_short());
3030 }
3031
3032 // Check for circular and duplicate entries.
3033 bool has_circularity = false;
3034 if (_need_verify) {
3035 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3036 if (has_circularity) {
3037 // If circularity check failed then ignore InnerClasses attribute.
3038 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3039 index = 0;
3040 if (parsed_enclosingmethod_attribute) {
3041 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3042 _inner_classes = inner_classes;
3043 } else {
3044 _inner_classes = Universe::the_empty_short_array();
3045 }
3046 }
3047 }
3048 // Set EnclosingMethod class and method indexes.
3049 if (parsed_enclosingmethod_attribute) {
3050 inner_classes->at_put(index++, enclosing_method_class_index);
3051 inner_classes->at_put(index++, enclosing_method_method_index);
3052 }
3053 assert(index == size || has_circularity, "wrong size");
3054
3055 // Restore buffer's current position.
3056 cfs->set_current(current_mark);
3057
3058 return length;
3059 }
3060
3061 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3062 const u1* const nest_members_attribute_start,
3063 TRAPS) {
3064 const u1* const current_mark = cfs->current();
3065 u2 length = 0;
3066 if (nest_members_attribute_start != nullptr) {
3067 cfs->set_current(nest_members_attribute_start);
3068 cfs->guarantee_more(2, CHECK_0); // length
3069 length = cfs->get_u2_fast();
3070 }
3071 const int size = length;
3072 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3073 _nest_members = nest_members;
3074
3075 int index = 0;
3076 cfs->guarantee_more(2 * length, CHECK_0);
3077 for (int n = 0; n < length; n++) {
3078 const u2 class_info_index = cfs->get_u2_fast();
3079 guarantee_property(
3080 valid_klass_reference_at(class_info_index),
3081 "Nest member class_info_index %u has bad constant type in class file %s",
3082 class_info_index, CHECK_0);
3083 nest_members->at_put(index++, class_info_index);
3084 }
3085 assert(index == size, "wrong size");
3086
3087 // Restore buffer's current position.
3088 cfs->set_current(current_mark);
3089
3090 return length;
3091 }
3092
3093 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3094 const u1* const permitted_subclasses_attribute_start,
3095 TRAPS) {
3096 const u1* const current_mark = cfs->current();
3097 u2 length = 0;
3098 if (permitted_subclasses_attribute_start != nullptr) {
3099 cfs->set_current(permitted_subclasses_attribute_start);
3100 cfs->guarantee_more(2, CHECK_0); // length
3101 length = cfs->get_u2_fast();
3102 }
3103 const int size = length;
3104 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3105 _permitted_subclasses = permitted_subclasses;
3106
3107 if (length > 0) {
3108 int index = 0;
3109 cfs->guarantee_more(2 * length, CHECK_0);
3110 for (int n = 0; n < length; n++) {
3111 const u2 class_info_index = cfs->get_u2_fast();
3112 guarantee_property(
3113 valid_klass_reference_at(class_info_index),
3114 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3115 class_info_index, CHECK_0);
3116 permitted_subclasses->at_put(index++, class_info_index);
3117 }
3118 assert(index == size, "wrong size");
3119 }
3120
3121 // Restore buffer's current position.
3122 cfs->set_current(current_mark);
3123
3124 return length;
3125 }
3126
3127 // Record {
3128 // u2 attribute_name_index;
3129 // u4 attribute_length;
3130 // u2 components_count;
3131 // component_info components[components_count];
3132 // }
3133 // component_info {
3134 // u2 name_index;
3135 // u2 descriptor_index
3136 // u2 attributes_count;
3137 // attribute_info_attributes[attributes_count];
3138 // }
3139 u4 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3140 const ConstantPool* cp,
3141 const u1* const record_attribute_start,
3142 TRAPS) {
3143 const u1* const current_mark = cfs->current();
3144 int components_count = 0;
3145 unsigned int calculate_attr_size = 0;
3146 if (record_attribute_start != nullptr) {
3147 cfs->set_current(record_attribute_start);
3148 cfs->guarantee_more(2, CHECK_0); // num of components
3149 components_count = (int)cfs->get_u2_fast();
3150 calculate_attr_size = 2;
3151 }
3152
3153 Array<RecordComponent*>* const record_components =
3154 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, nullptr, CHECK_0);
3155 _record_components = record_components;
3156
3157 for (int x = 0; x < components_count; x++) {
3158 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3159
3160 const u2 name_index = cfs->get_u2_fast();
3161 guarantee_property(valid_symbol_at(name_index),
3162 "Invalid constant pool index %u for name in Record attribute in class file %s",
3163 name_index, CHECK_0);
3164 const Symbol* const name = cp->symbol_at(name_index);
3165 verify_legal_field_name(name, CHECK_0);
3166
3167 const u2 descriptor_index = cfs->get_u2_fast();
3168 guarantee_property(valid_symbol_at(descriptor_index),
3169 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3170 descriptor_index, CHECK_0);
3171 const Symbol* const descr = cp->symbol_at(descriptor_index);
3172 verify_legal_field_signature(name, descr, CHECK_0);
3173
3174 const u2 attributes_count = cfs->get_u2_fast();
3175 calculate_attr_size += 6;
3176 u2 generic_sig_index = 0;
3177 const u1* runtime_visible_annotations = nullptr;
3178 int runtime_visible_annotations_length = 0;
3179 bool runtime_invisible_annotations_exists = false;
3180 const u1* runtime_visible_type_annotations = nullptr;
3181 int runtime_visible_type_annotations_length = 0;
3182 bool runtime_invisible_type_annotations_exists = false;
3183
3184 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3185 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3186 for (int y = 0; y < attributes_count; y++) {
3187 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3188 const u2 attribute_name_index = cfs->get_u2_fast();
3189 const u4 attribute_length = cfs->get_u4_fast();
3190 calculate_attr_size += 6;
3191 guarantee_property(
3192 valid_symbol_at(attribute_name_index),
3193 "Invalid Record attribute name index %u in class file %s",
3194 attribute_name_index, CHECK_0);
3195
3196 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3197 if (attribute_name == vmSymbols::tag_signature()) {
3198 if (generic_sig_index != 0) {
3199 classfile_parse_error(
3200 "Multiple Signature attributes for Record component in class file %s",
3201 THREAD);
3202 return 0;
3203 }
3204 if (attribute_length != 2) {
3205 classfile_parse_error(
3206 "Invalid Signature attribute length %u in Record component in class file %s",
3207 attribute_length, THREAD);
3208 return 0;
3209 }
3210 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3211
3212 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3213 if (runtime_visible_annotations != nullptr) {
3214 classfile_parse_error(
3215 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3216 return 0;
3217 }
3218 runtime_visible_annotations_length = attribute_length;
3219 runtime_visible_annotations = cfs->current();
3220
3221 assert(runtime_visible_annotations != nullptr, "null record component visible annotation");
3222 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3223 cfs->skip_u1_fast(runtime_visible_annotations_length);
3224
3225 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3226 if (runtime_invisible_annotations_exists) {
3227 classfile_parse_error(
3228 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3229 return 0;
3230 }
3231 runtime_invisible_annotations_exists = true;
3232 cfs->skip_u1(attribute_length, CHECK_0);
3233
3234 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3235 if (runtime_visible_type_annotations != nullptr) {
3236 classfile_parse_error(
3237 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3238 return 0;
3239 }
3240 runtime_visible_type_annotations_length = attribute_length;
3241 runtime_visible_type_annotations = cfs->current();
3242
3243 assert(runtime_visible_type_annotations != nullptr, "null record component visible type annotation");
3244 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3245 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3246
3247 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3248 if (runtime_invisible_type_annotations_exists) {
3249 classfile_parse_error(
3250 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3251 return 0;
3252 }
3253 runtime_invisible_type_annotations_exists = true;
3254 cfs->skip_u1(attribute_length, CHECK_0);
3255
3256 } else {
3257 // Skip unknown attributes
3258 cfs->skip_u1(attribute_length, CHECK_0);
3259 }
3260 calculate_attr_size += attribute_length;
3261 } // End of attributes For loop
3262
3263 AnnotationArray* annotations = allocate_annotations(runtime_visible_annotations,
3264 runtime_visible_annotations_length,
3265 CHECK_0);
3266 AnnotationArray* type_annotations = allocate_annotations(runtime_visible_type_annotations,
3267 runtime_visible_type_annotations_length,
3268 CHECK_0);
3269
3270 RecordComponent* record_component =
3271 RecordComponent::allocate(_loader_data, name_index, descriptor_index, generic_sig_index,
3272 annotations, type_annotations, CHECK_0);
3273 record_components->at_put(x, record_component);
3274 } // End of component processing loop
3275
3276 // Restore buffer's current position.
3277 cfs->set_current(current_mark);
3278 return calculate_attr_size;
3279 }
3280
3281 void ClassFileParser::parse_classfile_synthetic_attribute() {
3282 set_class_synthetic_flag(true);
3283 }
3284
3285 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3286 assert(cfs != nullptr, "invariant");
3287
3288 const u2 signature_index = cfs->get_u2(CHECK);
3289 guarantee_property(
3290 valid_symbol_at(signature_index),
3291 "Invalid constant pool index %u in Signature attribute in class file %s",
3292 signature_index, CHECK);
3293 set_class_generic_signature_index(signature_index);
3294 }
3295
3296 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3297 ConstantPool* cp,
3298 u4 attribute_byte_length,
3299 TRAPS) {
3300 assert(cfs != nullptr, "invariant");
3301 assert(cp != nullptr, "invariant");
3302 const int cp_size = cp->length();
3303
3304 const u1* const current_before_parsing = cfs->current();
3305
3306 guarantee_property(attribute_byte_length >= sizeof(u2),
3307 "Invalid BootstrapMethods attribute length %u in class file %s",
3308 attribute_byte_length,
3309 CHECK);
3310
3311 cfs->guarantee_more(attribute_byte_length, CHECK);
3312
3313 const int num_bootstrap_methods = cfs->get_u2_fast();
3314
3315 guarantee_property(_max_bootstrap_specifier_index < num_bootstrap_methods,
3316 "Short length on BootstrapMethods in class file %s",
3317 CHECK);
3318
3319 const u4 bootstrap_methods_u2_len = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3320
3321 // Eagerly assign the arrays so that they will be deallocated with the constant
3322 // pool if there is an error.
3323 BSMAttributeEntries::InsertionIterator iter =
3324 cp->bsm_entries().start_extension(num_bootstrap_methods,
3325 bootstrap_methods_u2_len,
3326 _loader_data,
3327 CHECK);
3328
3329 for (int i = 0; i < num_bootstrap_methods; i++) {
3330 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3331 u2 bootstrap_method_ref = cfs->get_u2_fast();
3332 u2 num_bootstrap_arguments = cfs->get_u2_fast();
3333 guarantee_property(
3334 valid_cp_range(bootstrap_method_ref, cp_size) &&
3335 cp->tag_at(bootstrap_method_ref).is_method_handle(),
3336 "bootstrap_method_index %u has bad constant type in class file %s",
3337 bootstrap_method_ref,
3338 CHECK);
3339 cfs->guarantee_more(sizeof(u2) * num_bootstrap_arguments, CHECK); // argv[argc]
3340
3341 BSMAttributeEntry* entry = iter.reserve_new_entry(bootstrap_method_ref, num_bootstrap_arguments);
3342 guarantee_property(entry != nullptr,
3343 "Invalid BootstrapMethods num_bootstrap_methods."
3344 " The total amount of space reserved for the BootstrapMethod attribute was not sufficient", CHECK);
3345
3346 for (int argi = 0; argi < num_bootstrap_arguments; argi++) {
3347 const u2 argument_index = cfs->get_u2_fast();
3348 guarantee_property(
3349 valid_cp_range(argument_index, cp_size) &&
3350 cp->tag_at(argument_index).is_loadable_constant(),
3351 "argument_index %u has bad constant type in class file %s",
3352 argument_index,
3353 CHECK);
3354 entry->set_argument(argi, argument_index);
3355 }
3356 }
3357 cp->bsm_entries().end_extension(iter, _loader_data, CHECK);
3358 guarantee_property(current_before_parsing + attribute_byte_length == cfs->current(),
3359 "Bad length on BootstrapMethods in class file %s",
3360 CHECK);
3361 }
3362
3363 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3364 ConstantPool* cp,
3365 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3366 TRAPS) {
3367 assert(cfs != nullptr, "invariant");
3368 assert(cp != nullptr, "invariant");
3369 assert(parsed_annotations != nullptr, "invariant");
3370
3371 // Set inner classes attribute to default sentinel
3372 _inner_classes = Universe::the_empty_short_array();
3373 // Set nest members attribute to default sentinel
3374 _nest_members = Universe::the_empty_short_array();
3375 // Set _permitted_subclasses attribute to default sentinel
3376 _permitted_subclasses = Universe::the_empty_short_array();
3377 cfs->guarantee_more(2, CHECK); // attributes_count
3378 u2 attributes_count = cfs->get_u2_fast();
3379 bool parsed_sourcefile_attribute = false;
3380 bool parsed_innerclasses_attribute = false;
3381 bool parsed_nest_members_attribute = false;
3382 bool parsed_permitted_subclasses_attribute = false;
3383 bool parsed_nest_host_attribute = false;
3384 bool parsed_record_attribute = false;
3385 bool parsed_enclosingmethod_attribute = false;
3386 bool parsed_bootstrap_methods_attribute = false;
3387 const u1* runtime_visible_annotations = nullptr;
3388 int runtime_visible_annotations_length = 0;
3389 const u1* runtime_visible_type_annotations = nullptr;
3390 int runtime_visible_type_annotations_length = 0;
3391 bool runtime_invisible_type_annotations_exists = false;
3392 bool runtime_invisible_annotations_exists = false;
3393 bool parsed_source_debug_ext_annotations_exist = false;
3394 const u1* inner_classes_attribute_start = nullptr;
3395 u4 inner_classes_attribute_length = 0;
3396 u2 enclosing_method_class_index = 0;
3397 u2 enclosing_method_method_index = 0;
3398 const u1* nest_members_attribute_start = nullptr;
3399 u4 nest_members_attribute_length = 0;
3400 const u1* record_attribute_start = nullptr;
3401 u4 record_attribute_length = 0;
3402 const u1* permitted_subclasses_attribute_start = nullptr;
3403 u4 permitted_subclasses_attribute_length = 0;
3404
3405 // Iterate over attributes
3406 while (attributes_count--) {
3407 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3408 const u2 attribute_name_index = cfs->get_u2_fast();
3409 const u4 attribute_length = cfs->get_u4_fast();
3410 guarantee_property(
3411 valid_symbol_at(attribute_name_index),
3412 "Attribute name has bad constant pool index %u in class file %s",
3413 attribute_name_index, CHECK);
3414 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3415 if (tag == vmSymbols::tag_source_file()) {
3416 // Check for SourceFile tag
3417 if (_need_verify) {
3418 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3419 }
3420 if (parsed_sourcefile_attribute) {
3421 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3422 return;
3423 } else {
3424 parsed_sourcefile_attribute = true;
3425 }
3426 parse_classfile_sourcefile_attribute(cfs, CHECK);
3427 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3428 // Check for SourceDebugExtension tag
3429 if (parsed_source_debug_ext_annotations_exist) {
3430 classfile_parse_error(
3431 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3432 return;
3433 }
3434 parsed_source_debug_ext_annotations_exist = true;
3435 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3436 } else if (tag == vmSymbols::tag_inner_classes()) {
3437 // Check for InnerClasses tag
3438 if (parsed_innerclasses_attribute) {
3439 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3440 return;
3441 } else {
3442 parsed_innerclasses_attribute = true;
3443 }
3444 inner_classes_attribute_start = cfs->current();
3445 inner_classes_attribute_length = attribute_length;
3446 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3447 } else if (tag == vmSymbols::tag_synthetic()) {
3448 // Check for Synthetic tag
3449 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3450 if (attribute_length != 0) {
3451 classfile_parse_error(
3452 "Invalid Synthetic classfile attribute length %u in class file %s",
3453 attribute_length, THREAD);
3454 return;
3455 }
3456 parse_classfile_synthetic_attribute();
3457 } else if (tag == vmSymbols::tag_deprecated()) {
3458 // Check for Deprecated tag - 4276120
3459 if (attribute_length != 0) {
3460 classfile_parse_error(
3461 "Invalid Deprecated classfile attribute length %u in class file %s",
3462 attribute_length, THREAD);
3463 return;
3464 }
3465 } else if (_major_version >= JAVA_1_5_VERSION) {
3466 if (tag == vmSymbols::tag_signature()) {
3467 if (_generic_signature_index != 0) {
3468 classfile_parse_error(
3469 "Multiple Signature attributes in class file %s", THREAD);
3470 return;
3471 }
3472 if (attribute_length != 2) {
3473 classfile_parse_error(
3474 "Wrong Signature attribute length %u in class file %s",
3475 attribute_length, THREAD);
3476 return;
3477 }
3478 parse_classfile_signature_attribute(cfs, CHECK);
3479 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3480 if (runtime_visible_annotations != nullptr) {
3481 classfile_parse_error(
3482 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3483 return;
3484 }
3485 runtime_visible_annotations_length = attribute_length;
3486 runtime_visible_annotations = cfs->current();
3487 assert(runtime_visible_annotations != nullptr, "null visible annotations");
3488 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3489 parse_annotations(cp,
3490 runtime_visible_annotations,
3491 runtime_visible_annotations_length,
3492 parsed_annotations,
3493 _loader_data,
3494 _can_access_vm_annotations);
3495 cfs->skip_u1_fast(runtime_visible_annotations_length);
3496 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3497 if (runtime_invisible_annotations_exists) {
3498 classfile_parse_error(
3499 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3500 return;
3501 }
3502 runtime_invisible_annotations_exists = true;
3503 cfs->skip_u1(attribute_length, CHECK);
3504 } else if (tag == vmSymbols::tag_enclosing_method()) {
3505 if (parsed_enclosingmethod_attribute) {
3506 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3507 return;
3508 } else {
3509 parsed_enclosingmethod_attribute = true;
3510 }
3511 guarantee_property(attribute_length == 4,
3512 "Wrong EnclosingMethod attribute length %u in class file %s",
3513 attribute_length, CHECK);
3514 cfs->guarantee_more(4, CHECK); // class_index, method_index
3515 enclosing_method_class_index = cfs->get_u2_fast();
3516 enclosing_method_method_index = cfs->get_u2_fast();
3517 if (enclosing_method_class_index == 0) {
3518 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3519 return;
3520 }
3521 // Validate the constant pool indices and types
3522 guarantee_property(valid_klass_reference_at(enclosing_method_class_index),
3523 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3524 if (enclosing_method_method_index != 0 &&
3525 (!cp->is_within_bounds(enclosing_method_method_index) ||
3526 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3527 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3528 return;
3529 }
3530 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3531 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3532 if (parsed_bootstrap_methods_attribute) {
3533 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3534 return;
3535 }
3536 parsed_bootstrap_methods_attribute = true;
3537 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3538 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3539 if (runtime_visible_type_annotations != nullptr) {
3540 classfile_parse_error(
3541 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3542 return;
3543 }
3544 runtime_visible_type_annotations_length = attribute_length;
3545 runtime_visible_type_annotations = cfs->current();
3546 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
3547 // No need for the VM to parse Type annotations
3548 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3549 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3550 if (runtime_invisible_type_annotations_exists) {
3551 classfile_parse_error(
3552 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3553 return;
3554 }
3555 runtime_invisible_type_annotations_exists = true;
3556 cfs->skip_u1(attribute_length, CHECK);
3557 } else if (_major_version >= JAVA_11_VERSION) {
3558 if (tag == vmSymbols::tag_nest_members()) {
3559 // Check for NestMembers tag
3560 if (parsed_nest_members_attribute) {
3561 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3562 return;
3563 } else {
3564 parsed_nest_members_attribute = true;
3565 }
3566 if (parsed_nest_host_attribute) {
3567 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3568 return;
3569 }
3570 nest_members_attribute_start = cfs->current();
3571 nest_members_attribute_length = attribute_length;
3572 cfs->skip_u1(nest_members_attribute_length, CHECK);
3573 } else if (tag == vmSymbols::tag_nest_host()) {
3574 if (parsed_nest_host_attribute) {
3575 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
3576 return;
3577 } else {
3578 parsed_nest_host_attribute = true;
3579 }
3580 if (parsed_nest_members_attribute) {
3581 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
3582 return;
3583 }
3584 if (_need_verify) {
3585 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3586 }
3587 cfs->guarantee_more(2, CHECK);
3588 u2 class_info_index = cfs->get_u2_fast();
3589 guarantee_property(
3590 valid_klass_reference_at(class_info_index),
3591 "Nest-host class_info_index %u has bad constant type in class file %s",
3592 class_info_index, CHECK);
3593 _nest_host = class_info_index;
3594
3595 } else if (_major_version >= JAVA_16_VERSION) {
3596 if (tag == vmSymbols::tag_record()) {
3597 if (parsed_record_attribute) {
3598 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
3599 return;
3600 }
3601 parsed_record_attribute = true;
3602 record_attribute_start = cfs->current();
3603 record_attribute_length = attribute_length;
3604 } else if (_major_version >= JAVA_17_VERSION) {
3605 if (tag == vmSymbols::tag_permitted_subclasses()) {
3606 if (parsed_permitted_subclasses_attribute) {
3607 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3608 return;
3609 }
3610 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3611 if (_access_flags.is_final()) {
3612 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3613 return;
3614 }
3615 parsed_permitted_subclasses_attribute = true;
3616 permitted_subclasses_attribute_start = cfs->current();
3617 permitted_subclasses_attribute_length = attribute_length;
3618 }
3619 }
3620 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3621 cfs->skip_u1(attribute_length, CHECK);
3622 } else {
3623 // Unknown attribute
3624 cfs->skip_u1(attribute_length, CHECK);
3625 }
3626 } else {
3627 // Unknown attribute
3628 cfs->skip_u1(attribute_length, CHECK);
3629 }
3630 } else {
3631 // Unknown attribute
3632 cfs->skip_u1(attribute_length, CHECK);
3633 }
3634 }
3635 _class_annotations = allocate_annotations(runtime_visible_annotations,
3636 runtime_visible_annotations_length,
3637 CHECK);
3638 _class_type_annotations = allocate_annotations(runtime_visible_type_annotations,
3639 runtime_visible_type_annotations_length,
3640 CHECK);
3641
3642 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3643 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3644 cfs,
3645 cp,
3646 inner_classes_attribute_start,
3647 parsed_innerclasses_attribute,
3648 enclosing_method_class_index,
3649 enclosing_method_method_index,
3650 CHECK);
3651 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3652 guarantee_property(
3653 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3654 "Wrong InnerClasses attribute length in class file %s", CHECK);
3655 }
3656 }
3657
3658 if (parsed_nest_members_attribute) {
3659 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3660 cfs,
3661 nest_members_attribute_start,
3662 CHECK);
3663 if (_need_verify) {
3664 guarantee_property(
3665 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3666 "Wrong NestMembers attribute length in class file %s", CHECK);
3667 }
3668 }
3669
3670 if (parsed_record_attribute) {
3671 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
3672 cfs,
3673 cp,
3674 record_attribute_start,
3675 CHECK);
3676 if (_need_verify) {
3677 guarantee_property(record_attribute_length == calculated_attr_length,
3678 "Record attribute has wrong length in class file %s",
3679 CHECK);
3680 }
3681 }
3682
3683 if (parsed_permitted_subclasses_attribute) {
3684 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3685 cfs,
3686 permitted_subclasses_attribute_start,
3687 CHECK);
3688 if (_need_verify) {
3689 guarantee_property(
3690 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3691 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3692 }
3693 }
3694
3695 if (_max_bootstrap_specifier_index >= 0) {
3696 guarantee_property(parsed_bootstrap_methods_attribute,
3697 "Missing BootstrapMethods attribute in class file %s", CHECK);
3698 }
3699 }
3700
3701 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3702 assert(k != nullptr, "invariant");
3703
3704 if (_synthetic_flag)
3705 k->set_is_synthetic();
3706 if (_sourcefile_index != 0) {
3707 k->set_source_file_name_index(_sourcefile_index);
3708 }
3709 if (_generic_signature_index != 0) {
3710 k->set_generic_signature_index(_generic_signature_index);
3711 }
3712 if (_sde_buffer != nullptr) {
3713 k->set_source_debug_extension(_sde_buffer, _sde_length);
3714 }
3715 }
3716
3717 // Create the Annotations object that will
3718 // hold the annotations array for the Klass.
3719 void ClassFileParser::create_combined_annotations(TRAPS) {
3720 if (_class_annotations == nullptr &&
3721 _class_type_annotations == nullptr &&
3722 _fields_annotations == nullptr &&
3723 _fields_type_annotations == nullptr) {
3724 // Don't create the Annotations object unnecessarily.
3725 return;
3726 }
3727
3728 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3729 annotations->set_class_annotations(_class_annotations);
3730 annotations->set_class_type_annotations(_class_type_annotations);
3731 annotations->set_fields_annotations(_fields_annotations);
3732 annotations->set_fields_type_annotations(_fields_type_annotations);
3733
3734 // This is the Annotations object that will be
3735 // assigned to InstanceKlass being constructed.
3736 _combined_annotations = annotations;
3737
3738 // The annotations arrays below has been transferred the
3739 // _combined_annotations so these fields can now be cleared.
3740 _class_annotations = nullptr;
3741 _class_type_annotations = nullptr;
3742 _fields_annotations = nullptr;
3743 _fields_type_annotations = nullptr;
3744 }
3745
3746 // Transfer ownership of metadata allocated to the InstanceKlass.
3747 void ClassFileParser::apply_parsed_class_metadata(
3748 InstanceKlass* this_klass,
3749 int java_fields_count) {
3750 assert(this_klass != nullptr, "invariant");
3751
3752 _cp->set_pool_holder(this_klass);
3753 this_klass->set_constants(_cp);
3754 this_klass->set_fieldinfo_stream(_fieldinfo_stream);
3755 this_klass->set_fieldinfo_search_table(_fieldinfo_search_table);
3756 this_klass->set_fields_status(_fields_status);
3757 this_klass->set_methods(_methods);
3758 this_klass->set_inner_classes(_inner_classes);
3759 this_klass->set_nest_members(_nest_members);
3760 this_klass->set_nest_host_index(_nest_host);
3761 this_klass->set_annotations(_combined_annotations);
3762 this_klass->set_permitted_subclasses(_permitted_subclasses);
3763 this_klass->set_record_components(_record_components);
3764
3765 DEBUG_ONLY(FieldInfoStream::validate_search_table(_cp, _fieldinfo_stream, _fieldinfo_search_table));
3766
3767 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3768 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3769 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3770 // its _super. If an OOM occurs while loading the current klass, its _super field
3771 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3772 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3773 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3774
3775 // Clear out these fields so they don't get deallocated by the destructor
3776 clear_class_metadata();
3777 }
3778
3779 AnnotationArray* ClassFileParser::allocate_annotations(const u1* const anno,
3780 int anno_length,
3781 TRAPS) {
3782 AnnotationArray* annotations = nullptr;
3783 if (anno != nullptr) {
3784 annotations = MetadataFactory::new_array<u1>(_loader_data,
3785 anno_length,
3786 CHECK_(annotations));
3787 for (int i = 0; i < anno_length; i++) {
3788 annotations->at_put(i, anno[i]);
3789 }
3790 }
3791 return annotations;
3792 }
3793
3794 void ClassFileParser::check_super_class(ConstantPool* const cp,
3795 const int super_class_index,
3796 const bool need_verify,
3797 TRAPS) {
3798 assert(cp != nullptr, "invariant");
3799
3800 if (super_class_index == 0) {
3801 guarantee_property(_class_name == vmSymbols::java_lang_Object(),
3802 "Invalid superclass index %u in class file %s",
3803 super_class_index,
3804 CHECK);
3805 } else {
3806 guarantee_property(valid_klass_reference_at(super_class_index),
3807 "Invalid superclass index %u in class file %s",
3808 super_class_index,
3809 CHECK);
3810
3811 // The class name should be legal because it is checked when parsing constant pool.
3812 // However, make sure it is not an array type.
3813 if (need_verify) {
3814 guarantee_property(cp->klass_name_at(super_class_index)->char_at(0) != JVM_SIGNATURE_ARRAY,
3815 "Bad superclass name in class file %s", CHECK);
3816 }
3817 }
3818 }
3819
3820 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
3821 _max_nonstatic_oop_maps = max_blocks;
3822 _nonstatic_oop_map_count = 0;
3823 if (max_blocks == 0) {
3824 _nonstatic_oop_maps = nullptr;
3825 } else {
3826 _nonstatic_oop_maps =
3827 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
3828 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3829 }
3830 }
3831
3832 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
3833 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
3834 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
3835 }
3836
3837 // addition of super oop maps
3838 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3839 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
3840 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
3841
3842 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3843 _nonstatic_oop_map_count += nof_blocks;
3844 }
3845
3846 // collection of oops
3847 void OopMapBlocksBuilder::add(int offset, int count) {
3848 if (_nonstatic_oop_map_count == 0) {
3849 _nonstatic_oop_map_count++;
3850 }
3851 OopMapBlock* nonstatic_oop_map = last_oop_map();
3852 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3853 nonstatic_oop_map->set_offset(offset);
3854 nonstatic_oop_map->set_count(count);
3855 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3856 nonstatic_oop_map->increment_count(count);
3857 } else { // Need a new one...
3858 _nonstatic_oop_map_count++;
3859 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
3860 nonstatic_oop_map = last_oop_map();
3861 nonstatic_oop_map->set_offset(offset);
3862 nonstatic_oop_map->set_count(count);
3863 }
3864 }
3865
3866 // general purpose copy, e.g. into allocated instanceKlass
3867 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
3868 if (_nonstatic_oop_map_count != 0) {
3869 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
3870 }
3871 }
3872
3873 // Sort and compact adjacent blocks
3874 void OopMapBlocksBuilder::compact() {
3875 if (_nonstatic_oop_map_count <= 1) {
3876 return;
3877 }
3878 /*
3879 * Since field layout sneaks in oops before values, we will be able to condense
3880 * blocks. There is potential to compact between super, own refs and values
3881 * containing refs.
3882 *
3883 * Currently compaction is slightly limited due to values being 8 byte aligned.
3884 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
3885 * and maybe it doesn't need to be.
3886 */
3887 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
3888 (_sort_Fn)OopMapBlock::compare_offset);
3889 if (_nonstatic_oop_map_count < 2) {
3890 return;
3891 }
3892
3893 // Make a temp copy, and iterate through and copy back into the original
3894 ResourceMark rm;
3895 OopMapBlock* oop_maps_copy =
3896 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
3897 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
3898 copy(oop_maps_copy);
3899 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
3900 unsigned int new_count = 1;
3901 oop_maps_copy++;
3902 while(oop_maps_copy < oop_maps_copy_end) {
3903 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3904 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3905 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3906 } else {
3907 nonstatic_oop_map++;
3908 new_count++;
3909 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3910 nonstatic_oop_map->set_count(oop_maps_copy->count());
3911 }
3912 oop_maps_copy++;
3913 }
3914 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
3915 _nonstatic_oop_map_count = new_count;
3916 }
3917
3918 void OopMapBlocksBuilder::print_on(outputStream* st) const {
3919 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
3920 if (_nonstatic_oop_map_count > 0) {
3921 OopMapBlock* map = _nonstatic_oop_maps;
3922 OopMapBlock* last_map = last_oop_map();
3923 assert(map <= last_map, "Last less than first");
3924 while (map <= last_map) {
3925 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3926 map->offset() + map->offset_span() - heapOopSize, map->count());
3927 map++;
3928 }
3929 }
3930 }
3931
3932 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
3933 print_on(st);
3934 }
3935
3936 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
3937 assert(ik != nullptr, "invariant");
3938
3939 const InstanceKlass* const super = ik->super();
3940
3941 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3942 // in which case we don't have to register objects as finalizable
3943 if (!_has_empty_finalizer) {
3944 if (_has_finalizer ||
3945 (super != nullptr && super->has_finalizer())) {
3946 ik->set_has_finalizer();
3947 }
3948 }
3949
3950 #ifdef ASSERT
3951 bool f = false;
3952 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
3953 vmSymbols::void_method_signature());
3954 if (InstanceKlass::is_finalization_enabled() &&
3955 (m != nullptr) && !m->is_empty_method()) {
3956 f = true;
3957 }
3958
3959 // Spec doesn't prevent agent from redefinition of empty finalizer.
3960 // Despite the fact that it's generally bad idea and redefined finalizer
3961 // will not work as expected we shouldn't abort vm in this case
3962 if (!ik->has_redefined_this_or_super()) {
3963 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
3964 }
3965 #endif
3966
3967 // Check if this klass supports the java.lang.Cloneable interface
3968 if (vmClasses::Cloneable_klass_is_loaded()) {
3969 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
3970 ik->set_is_cloneable();
3971 }
3972 }
3973
3974 // If it cannot be fast-path allocated, set a bit in the layout helper.
3975 // See documentation of InstanceKlass::can_be_fastpath_allocated().
3976 assert(ik->size_helper() > 0, "layout_helper is initialized");
3977 if (ik->is_abstract() || ik->is_interface()
3978 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == nullptr)
3979 || ik->size_helper() >= FastAllocateSizeLimit) {
3980 // Forbid fast-path allocation.
3981 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
3982 ik->set_layout_helper(lh);
3983 }
3984
3985 // Propagate the AOT runtimeSetup method discovery
3986 if (_has_aot_runtime_setup_method) {
3987 ik->set_is_runtime_setup_required();
3988 if (log_is_enabled(Info, aot, init)) {
3989 ResourceMark rm;
3990 log_info(aot, init)("Found @AOTRuntimeSetup class %s", ik->external_name());
3991 }
3992 }
3993 }
3994
3995 // utility methods for appending an array with check for duplicates
3996
3997 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
3998 const Array<InstanceKlass*>* const ifs) {
3999 // iterate over new interfaces
4000 for (int i = 0; i < ifs->length(); i++) {
4001 InstanceKlass* const e = ifs->at(i);
4002 assert(e->is_klass() && e->is_interface(), "just checking");
4003 // add new interface
4004 result->append_if_missing(e);
4005 }
4006 }
4007
4008 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4009 Array<InstanceKlass*>* local_ifs,
4010 ClassLoaderData* loader_data,
4011 TRAPS) {
4012 assert(local_ifs != nullptr, "invariant");
4013 assert(loader_data != nullptr, "invariant");
4014
4015 // Compute maximum size for transitive interfaces
4016 int max_transitive_size = 0;
4017 int super_size = 0;
4018 // Add superclass transitive interfaces size
4019 if (super != nullptr) {
4020 super_size = super->transitive_interfaces()->length();
4021 max_transitive_size += super_size;
4022 }
4023 // Add local interfaces' super interfaces
4024 const int local_size = local_ifs->length();
4025 for (int i = 0; i < local_size; i++) {
4026 InstanceKlass* const l = local_ifs->at(i);
4027 max_transitive_size += l->transitive_interfaces()->length();
4028 }
4029 // Finally add local interfaces
4030 max_transitive_size += local_size;
4031 // Construct array
4032 if (max_transitive_size == 0) {
4033 // no interfaces, use canonicalized array
4034 return Universe::the_empty_instance_klass_array();
4035 } else if (max_transitive_size == super_size) {
4036 // no new local interfaces added, share superklass' transitive interface array
4037 return super->transitive_interfaces();
4038 } else if (max_transitive_size == local_size) {
4039 // only local interfaces added, share local interface array
4040 return local_ifs;
4041 } else {
4042 ResourceMark rm;
4043 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4044
4045 // Copy down from superclass
4046 if (super != nullptr) {
4047 append_interfaces(result, super->transitive_interfaces());
4048 }
4049
4050 // Copy down from local interfaces' superinterfaces
4051 for (int i = 0; i < local_size; i++) {
4052 InstanceKlass* const l = local_ifs->at(i);
4053 append_interfaces(result, l->transitive_interfaces());
4054 }
4055 // Finally add local interfaces
4056 append_interfaces(result, local_ifs);
4057
4058 // length will be less than the max_transitive_size if duplicates were removed
4059 const int length = result->length();
4060 assert(length <= max_transitive_size, "just checking");
4061 Array<InstanceKlass*>* const new_result =
4062 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4063 for (int i = 0; i < length; i++) {
4064 InstanceKlass* const e = result->at(i);
4065 assert(e != nullptr, "just checking");
4066 new_result->at_put(i, e);
4067 }
4068 return new_result;
4069 }
4070 }
4071
4072 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4073 assert(this_klass != nullptr, "invariant");
4074 const InstanceKlass* const super = this_klass->super();
4075
4076 if (super != nullptr) {
4077 if (super->is_final()) {
4078 classfile_icce_error("class %s cannot inherit from final class %s", super, THREAD);
4079 return;
4080 }
4081
4082 if (super->is_sealed()) {
4083 stringStream ss;
4084 ResourceMark rm(THREAD);
4085 if (!super->has_as_permitted_subclass(this_klass, ss)) {
4086 classfile_icce_error(ss.as_string(), THREAD);
4087 return;
4088 }
4089 }
4090
4091 Reflection::VerifyClassAccessResults vca_result =
4092 Reflection::verify_class_access(this_klass, super, false);
4093 if (vca_result != Reflection::ACCESS_OK) {
4094 ResourceMark rm(THREAD);
4095 char* msg = Reflection::verify_class_access_msg(this_klass,
4096 super,
4097 vca_result);
4098
4099 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4100 if (msg == nullptr) {
4101 bool same_module = (this_klass->module() == super->module());
4102 Exceptions::fthrow(
4103 THREAD_AND_LOCATION,
4104 vmSymbols::java_lang_IllegalAccessError(),
4105 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4106 this_klass->external_name(),
4107 super->is_abstract() ? "abstract " : "",
4108 super->external_name(),
4109 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4110 (same_module) ? "" : "; ",
4111 (same_module) ? "" : super->class_in_module_of_loader());
4112 } else {
4113 // Add additional message content.
4114 Exceptions::fthrow(
4115 THREAD_AND_LOCATION,
4116 vmSymbols::java_lang_IllegalAccessError(),
4117 "superclass access check failed: %s",
4118 msg);
4119 }
4120 }
4121 }
4122 }
4123
4124
4125 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4126 assert(this_klass != nullptr, "invariant");
4127 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4128 const int lng = local_interfaces->length();
4129 for (int i = lng - 1; i >= 0; i--) {
4130 InstanceKlass* const k = local_interfaces->at(i);
4131 assert (k != nullptr && k->is_interface(), "invalid interface");
4132
4133 if (k->is_sealed()) {
4134 stringStream ss;
4135 ResourceMark rm(THREAD);
4136 if (!k->has_as_permitted_subclass(this_klass, ss)) {
4137 classfile_icce_error(ss.as_string(), THREAD);
4138 return;
4139 }
4140 }
4141
4142 Reflection::VerifyClassAccessResults vca_result =
4143 Reflection::verify_class_access(this_klass, k, false);
4144 if (vca_result != Reflection::ACCESS_OK) {
4145 ResourceMark rm(THREAD);
4146 char* msg = Reflection::verify_class_access_msg(this_klass,
4147 k,
4148 vca_result);
4149
4150 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4151 if (msg == nullptr) {
4152 bool same_module = (this_klass->module() == k->module());
4153 Exceptions::fthrow(
4154 THREAD_AND_LOCATION,
4155 vmSymbols::java_lang_IllegalAccessError(),
4156 "class %s cannot access its superinterface %s (%s%s%s)",
4157 this_klass->external_name(),
4158 k->external_name(),
4159 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4160 (same_module) ? "" : "; ",
4161 (same_module) ? "" : k->class_in_module_of_loader());
4162 return;
4163 } else {
4164 // Add additional message content.
4165 Exceptions::fthrow(
4166 THREAD_AND_LOCATION,
4167 vmSymbols::java_lang_IllegalAccessError(),
4168 "superinterface check failed: %s",
4169 msg);
4170 return;
4171 }
4172 }
4173 }
4174 }
4175
4176
4177 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4178 assert(this_klass != nullptr, "invariant");
4179 const Array<Method*>* const methods = this_klass->methods();
4180 const int num_methods = methods->length();
4181
4182 // go thru each method and check if it overrides a final method
4183 for (int index = 0; index < num_methods; index++) {
4184 const Method* const m = methods->at(index);
4185
4186 // skip private, static, and <init> methods
4187 if ((!m->is_private() && !m->is_static()) &&
4188 (m->name() != vmSymbols::object_initializer_name())) {
4189
4190 const Symbol* const name = m->name();
4191 const Symbol* const signature = m->signature();
4192 const InstanceKlass* k = this_klass->super();
4193 const Method* super_m = nullptr;
4194 while (k != nullptr) {
4195 // skip supers that don't have final methods.
4196 if (k->has_final_method()) {
4197 // lookup a matching method in the super class hierarchy
4198 super_m = k->lookup_method(name, signature);
4199 if (super_m == nullptr) {
4200 break; // didn't find any match; get out
4201 }
4202
4203 if (super_m->is_final() && !super_m->is_static() &&
4204 !super_m->access_flags().is_private()) {
4205 // matching method in super is final, and not static or private
4206 bool can_access = Reflection::verify_member_access(this_klass,
4207 super_m->method_holder(),
4208 super_m->method_holder(),
4209 super_m->access_flags(),
4210 false, false, CHECK);
4211 if (can_access) {
4212 // this class can access super final method and therefore override
4213 ResourceMark rm(THREAD);
4214 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4215 err_msg("class %s overrides final method %s.%s%s",
4216 this_klass->external_name(),
4217 super_m->method_holder()->external_name(),
4218 name->as_C_string(),
4219 signature->as_C_string()));
4220 }
4221 }
4222
4223 // continue to look from super_m's holder's super.
4224 k = super_m->method_holder()->super();
4225 continue;
4226 }
4227
4228 k = k->super();
4229 }
4230 }
4231 }
4232 }
4233
4234
4235 // assumes that this_klass is an interface
4236 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4237 assert(this_klass != nullptr, "invariant");
4238 assert(this_klass->is_interface(), "not an interface");
4239 const Array<Method*>* methods = this_klass->methods();
4240 const int num_methods = methods->length();
4241
4242 for (int index = 0; index < num_methods; index++) {
4243 const Method* const m = methods->at(index);
4244 // if m is static and not the init method, throw a verify error
4245 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4246 ResourceMark rm(THREAD);
4247
4248 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4249 Exceptions::fthrow(
4250 THREAD_AND_LOCATION,
4251 vmSymbols::java_lang_VerifyError(),
4252 "Illegal static method %s in interface %s",
4253 m->name()->as_C_string(),
4254 this_klass->external_name()
4255 );
4256 return;
4257 }
4258 }
4259 }
4260
4261 // utility methods for format checking
4262
4263 // Verify the class modifiers for the current class, or an inner class if inner_name is non-null.
4264 void ClassFileParser::verify_legal_class_modifiers(jint flags, Symbol* inner_name, bool is_anonymous_inner_class, TRAPS) const {
4265 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4266 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4267 if (is_module) {
4268 ResourceMark rm(THREAD);
4269 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4270 Exceptions::fthrow(
4271 THREAD_AND_LOCATION,
4272 vmSymbols::java_lang_NoClassDefFoundError(),
4273 "%s is not a class because access_flag ACC_MODULE is set",
4274 _class_name->as_C_string());
4275 return;
4276 }
4277
4278 if (!_need_verify) { return; }
4279
4280 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4281 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4282 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4283 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4284 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4285 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4286 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4287
4288 if ((is_abstract && is_final) ||
4289 (is_interface && !is_abstract) ||
4290 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4291 (!is_interface && major_gte_1_5 && is_annotation)) {
4292 ResourceMark rm(THREAD);
4293 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4294 if (inner_name == nullptr && !is_anonymous_inner_class) {
4295 Exceptions::fthrow(
4296 THREAD_AND_LOCATION,
4297 vmSymbols::java_lang_ClassFormatError(),
4298 "Illegal class modifiers in class %s: 0x%X",
4299 _class_name->as_C_string(), flags
4300 );
4301 } else {
4302 if (is_anonymous_inner_class) {
4303 Exceptions::fthrow(
4304 THREAD_AND_LOCATION,
4305 vmSymbols::java_lang_ClassFormatError(),
4306 "Illegal class modifiers in anonymous inner class of class %s: 0x%X",
4307 _class_name->as_C_string(), flags
4308 );
4309 } else {
4310 Exceptions::fthrow(
4311 THREAD_AND_LOCATION,
4312 vmSymbols::java_lang_ClassFormatError(),
4313 "Illegal class modifiers in inner class %s of class %s: 0x%X",
4314 inner_name->as_C_string(), _class_name->as_C_string(), flags
4315 );
4316 }
4317 }
4318 return;
4319 }
4320 }
4321
4322 static bool has_illegal_visibility(jint flags) {
4323 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4324 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4325 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4326
4327 return ((is_public && is_protected) ||
4328 (is_public && is_private) ||
4329 (is_protected && is_private));
4330 }
4331
4332 // A legal major_version.minor_version must be one of the following:
4333 //
4334 // Major_version >= 45 and major_version < 56, any minor_version.
4335 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4336 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4337 //
4338 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4339 ResourceMark rm(THREAD);
4340 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4341 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4342 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4343 class_name, major, minor, THREAD);
4344 return;
4345 }
4346
4347 if (major > max_version) {
4348 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4349 Exceptions::fthrow(
4350 THREAD_AND_LOCATION,
4351 vmSymbols::java_lang_UnsupportedClassVersionError(),
4352 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4353 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4354 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4355 return;
4356 }
4357
4358 if (major < JAVA_12_VERSION || minor == 0) {
4359 return;
4360 }
4361
4362 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4363 if (major != max_version) {
4364 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4365 Exceptions::fthrow(
4366 THREAD_AND_LOCATION,
4367 vmSymbols::java_lang_UnsupportedClassVersionError(),
4368 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4369 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4370 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4371 return;
4372 }
4373
4374 if (!Arguments::enable_preview()) {
4375 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4376 class_name, major, minor, THREAD);
4377 return;
4378 }
4379
4380 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4381 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4382 class_name, major, minor, THREAD);
4383 }
4384 }
4385
4386 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4387 bool is_interface,
4388 TRAPS) const {
4389 if (!_need_verify) { return; }
4390
4391 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4392 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4393 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4394 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4395 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4396 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4397 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4398 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4399 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4400
4401 bool is_illegal = false;
4402
4403 if (is_interface) {
4404 if (!is_public || !is_static || !is_final || is_private ||
4405 is_protected || is_volatile || is_transient ||
4406 (major_gte_1_5 && is_enum)) {
4407 is_illegal = true;
4408 }
4409 } else { // not interface
4410 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4411 is_illegal = true;
4412 }
4413 }
4414
4415 if (is_illegal) {
4416 ResourceMark rm(THREAD);
4417 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4418 Exceptions::fthrow(
4419 THREAD_AND_LOCATION,
4420 vmSymbols::java_lang_ClassFormatError(),
4421 "Illegal field modifiers in class %s: 0x%X",
4422 _class_name->as_C_string(), flags);
4423 return;
4424 }
4425 }
4426
4427 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4428 bool is_interface,
4429 const Symbol* name,
4430 TRAPS) const {
4431 if (!_need_verify) { return; }
4432
4433 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4434 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4435 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4436 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4437 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4438 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4439 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4440 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4441 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4442 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4443 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4444 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4445 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4446 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4447
4448 bool is_illegal = false;
4449
4450 if (is_interface) {
4451 if (major_gte_8) {
4452 // Class file version is JAVA_8_VERSION or later Methods of
4453 // interfaces may set any of the flags except ACC_PROTECTED,
4454 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4455 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4456 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4457 (is_native || is_protected || is_final || is_synchronized) ||
4458 // If a specific method of a class or interface has its
4459 // ACC_ABSTRACT flag set, it must not have any of its
4460 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4461 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4462 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4463 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4464 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4465 is_illegal = true;
4466 }
4467 } else if (major_gte_1_5) {
4468 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4469 if (!is_public || is_private || is_protected || is_static || is_final ||
4470 is_synchronized || is_native || !is_abstract || is_strict) {
4471 is_illegal = true;
4472 }
4473 } else {
4474 // Class file version is pre-JAVA_1_5_VERSION
4475 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4476 is_illegal = true;
4477 }
4478 }
4479 } else { // not interface
4480 if (has_illegal_visibility(flags)) {
4481 is_illegal = true;
4482 } else {
4483 if (is_initializer) {
4484 if (is_static || is_final || is_synchronized || is_native ||
4485 is_abstract || (major_gte_1_5 && is_bridge)) {
4486 is_illegal = true;
4487 }
4488 } else { // not initializer
4489 if (is_abstract) {
4490 if ((is_final || is_native || is_private || is_static ||
4491 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4492 is_illegal = true;
4493 }
4494 }
4495 }
4496 }
4497 }
4498
4499 if (is_illegal) {
4500 ResourceMark rm(THREAD);
4501 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4502 Exceptions::fthrow(
4503 THREAD_AND_LOCATION,
4504 vmSymbols::java_lang_ClassFormatError(),
4505 "Method %s in class %s has illegal modifiers: 0x%X",
4506 name->as_C_string(), _class_name->as_C_string(), flags);
4507 return;
4508 }
4509 }
4510
4511 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4512 int length,
4513 TRAPS) const {
4514 assert(_need_verify, "only called when _need_verify is true");
4515 // Note: 0 <= length < 64K, as it comes from a u2 entry in the CP.
4516 if (!UTF8::is_legal_utf8(buffer, static_cast<size_t>(length), _major_version <= 47)) {
4517 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4518 }
4519 }
4520
4521 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4522 // In class names, '/' separates unqualified names. This is verified in this function also.
4523 // Method names also may not contain the characters '<' or '>', unless <init>
4524 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4525 // method. Because these names have been checked as special cases before
4526 // calling this method in verify_legal_method_name.
4527 //
4528 // This method is also called from the modular system APIs in modules.cpp
4529 // to verify the validity of module and package names.
4530 bool ClassFileParser::verify_unqualified_name(const char* name,
4531 unsigned int length,
4532 int type) {
4533 if (length == 0) return false; // Must have at least one char.
4534 for (const char* p = name; p != name + length; p++) {
4535 switch(*p) {
4536 case JVM_SIGNATURE_DOT:
4537 case JVM_SIGNATURE_ENDCLASS:
4538 case JVM_SIGNATURE_ARRAY:
4539 // do not permit '.', ';', or '['
4540 return false;
4541 case JVM_SIGNATURE_SLASH:
4542 // check for '//' or leading or trailing '/' which are not legal
4543 // unqualified name must not be empty
4544 if (type == ClassFileParser::LegalClass) {
4545 if (p == name || p+1 >= name+length ||
4546 *(p+1) == JVM_SIGNATURE_SLASH) {
4547 return false;
4548 }
4549 } else {
4550 return false; // do not permit '/' unless it's class name
4551 }
4552 break;
4553 case JVM_SIGNATURE_SPECIAL:
4554 case JVM_SIGNATURE_ENDSPECIAL:
4555 // do not permit '<' or '>' in method names
4556 if (type == ClassFileParser::LegalMethod) {
4557 return false;
4558 }
4559 }
4560 }
4561 return true;
4562 }
4563
4564 // Take pointer to a UTF8 byte string (not NUL-terminated).
4565 // Skip over the longest part of the string that could
4566 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
4567 // Return a pointer to just past the fieldname.
4568 // Return null if no fieldname at all was found, or in the case of slash_ok
4569 // being true, we saw consecutive slashes (meaning we were looking for a
4570 // qualified path but found something that was badly-formed).
4571 static const char* skip_over_field_name(const char* const name,
4572 bool slash_ok,
4573 unsigned int length) {
4574 const char* p;
4575 jboolean last_is_slash = false;
4576 jboolean not_first_ch = false;
4577
4578 for (p = name; p != name + length; not_first_ch = true) {
4579 const char* old_p = p;
4580 jchar ch = *p;
4581 if (ch < 128) {
4582 p++;
4583 // quick check for ascii
4584 if ((ch >= 'a' && ch <= 'z') ||
4585 (ch >= 'A' && ch <= 'Z') ||
4586 (ch == '_' || ch == '$') ||
4587 (not_first_ch && ch >= '0' && ch <= '9')) {
4588 last_is_slash = false;
4589 continue;
4590 }
4591 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
4592 if (last_is_slash) {
4593 return nullptr; // Don't permit consecutive slashes
4594 }
4595 last_is_slash = true;
4596 continue;
4597 }
4598 }
4599 else {
4600 jint unicode_ch;
4601 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4602 p = tmp_p;
4603 last_is_slash = false;
4604 // Check if ch is Java identifier start or is Java identifier part
4605 // 4672820: call java.lang.Character methods directly without generating separate tables.
4606 EXCEPTION_MARK;
4607 // return value
4608 JavaValue result(T_BOOLEAN);
4609 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
4610 JavaCallArguments args;
4611 args.push_int(unicode_ch);
4612
4613 if (not_first_ch) {
4614 // public static boolean isJavaIdentifierPart(char ch);
4615 JavaCalls::call_static(&result,
4616 vmClasses::Character_klass(),
4617 vmSymbols::isJavaIdentifierPart_name(),
4618 vmSymbols::int_bool_signature(),
4619 &args,
4620 THREAD);
4621 } else {
4622 // public static boolean isJavaIdentifierStart(char ch);
4623 JavaCalls::call_static(&result,
4624 vmClasses::Character_klass(),
4625 vmSymbols::isJavaIdentifierStart_name(),
4626 vmSymbols::int_bool_signature(),
4627 &args,
4628 THREAD);
4629 }
4630 if (HAS_PENDING_EXCEPTION) {
4631 CLEAR_PENDING_EXCEPTION;
4632 return nullptr;
4633 }
4634 if(result.get_jboolean()) {
4635 continue;
4636 }
4637 }
4638 return (not_first_ch) ? old_p : nullptr;
4639 }
4640 return (not_first_ch && !last_is_slash) ? p : nullptr;
4641 }
4642
4643 // Take pointer to a UTF8 byte string (not NUL-terminated).
4644 // Skip over the longest part of the string that could
4645 // be taken as a field signature. Allow "void" if void_ok.
4646 // Return a pointer to just past the signature.
4647 // Return null if no legal signature is found.
4648 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4649 bool void_ok,
4650 unsigned int length,
4651 TRAPS) const {
4652 unsigned int array_dim = 0;
4653 while (length > 0) {
4654 switch (signature[0]) {
4655 case JVM_SIGNATURE_VOID: if (!void_ok) { return nullptr; }
4656 case JVM_SIGNATURE_BOOLEAN:
4657 case JVM_SIGNATURE_BYTE:
4658 case JVM_SIGNATURE_CHAR:
4659 case JVM_SIGNATURE_SHORT:
4660 case JVM_SIGNATURE_INT:
4661 case JVM_SIGNATURE_FLOAT:
4662 case JVM_SIGNATURE_LONG:
4663 case JVM_SIGNATURE_DOUBLE:
4664 return signature + 1;
4665 case JVM_SIGNATURE_CLASS: {
4666 if (_major_version < JAVA_1_5_VERSION) {
4667 signature++;
4668 length--;
4669 // Skip over the class name if one is there
4670 const char* const p = skip_over_field_name(signature, true, length);
4671 assert(p == nullptr || p > signature, "must parse one character at least");
4672 // The next character better be a semicolon
4673 if (p != nullptr && // Parse of field name succeeded.
4674 p - signature < static_cast<int>(length) && // There is at least one character left to parse.
4675 p[0] == JVM_SIGNATURE_ENDCLASS) {
4676 return p + 1;
4677 }
4678 }
4679 else {
4680 // Skip leading 'L' and ignore first appearance of ';'
4681 signature++;
4682 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4683 // Format check signature
4684 if (c != nullptr) {
4685 int newlen = pointer_delta_as_int(c, (char*) signature);
4686 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4687 if (!legal) {
4688 classfile_parse_error("Class name is empty or contains illegal character "
4689 "in descriptor in class file %s",
4690 THREAD);
4691 return nullptr;
4692 }
4693 return signature + newlen + 1;
4694 }
4695 }
4696 return nullptr;
4697 }
4698 case JVM_SIGNATURE_ARRAY:
4699 array_dim++;
4700 if (array_dim > 255) {
4701 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4702 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
4703 return nullptr;
4704 }
4705 // The rest of what's there better be a legal signature
4706 signature++;
4707 length--;
4708 void_ok = false;
4709 break;
4710 default:
4711 return nullptr;
4712 }
4713 }
4714 return nullptr;
4715 }
4716
4717 // Checks if name is a legal class name.
4718 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4719 if (!_need_verify) { return; }
4720
4721 assert(name->refcount() > 0, "symbol must be kept alive");
4722 char* bytes = (char*)name->bytes();
4723 unsigned int length = name->utf8_length();
4724 bool legal = false;
4725
4726 if (length > 0) {
4727 const char* p;
4728 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4729 p = skip_over_field_signature(bytes, false, length, CHECK);
4730 legal = (p != nullptr) && ((p - bytes) == (int)length);
4731 } else if (_major_version < JAVA_1_5_VERSION) {
4732 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4733 p = skip_over_field_name(bytes, true, length);
4734 legal = (p != nullptr) && ((p - bytes) == (int)length);
4735 }
4736 } else {
4737 // 4900761: relax the constraints based on JSR202 spec
4738 // Class names may be drawn from the entire Unicode character set.
4739 // Identifiers between '/' must be unqualified names.
4740 // The utf8 string has been verified when parsing cpool entries.
4741 legal = verify_unqualified_name(bytes, length, LegalClass);
4742 }
4743 }
4744 if (!legal) {
4745 ResourceMark rm(THREAD);
4746 assert(_class_name != nullptr, "invariant");
4747 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4748 Exceptions::fthrow(
4749 THREAD_AND_LOCATION,
4750 vmSymbols::java_lang_ClassFormatError(),
4751 "Illegal class name \"%.*s\" in class file %s", length, bytes,
4752 _class_name->as_C_string()
4753 );
4754 return;
4755 }
4756 }
4757
4758 // Checks if name is a legal field name.
4759 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4760 if (!_need_verify) { return; }
4761
4762 char* bytes = (char*)name->bytes();
4763 unsigned int length = name->utf8_length();
4764 bool legal = false;
4765
4766 if (length > 0) {
4767 if (_major_version < JAVA_1_5_VERSION) {
4768 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4769 const char* p = skip_over_field_name(bytes, false, length);
4770 legal = (p != nullptr) && ((p - bytes) == (int)length);
4771 }
4772 } else {
4773 // 4881221: relax the constraints based on JSR202 spec
4774 legal = verify_unqualified_name(bytes, length, LegalField);
4775 }
4776 }
4777
4778 if (!legal) {
4779 ResourceMark rm(THREAD);
4780 assert(_class_name != nullptr, "invariant");
4781 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4782 Exceptions::fthrow(
4783 THREAD_AND_LOCATION,
4784 vmSymbols::java_lang_ClassFormatError(),
4785 "Illegal field name \"%.*s\" in class %s", length, bytes,
4786 _class_name->as_C_string()
4787 );
4788 return;
4789 }
4790 }
4791
4792 // Checks if name is a legal method name.
4793 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4794 if (!_need_verify) { return; }
4795
4796 assert(name != nullptr, "method name is null");
4797 char* bytes = (char*)name->bytes();
4798 unsigned int length = name->utf8_length();
4799 bool legal = false;
4800
4801 if (length > 0) {
4802 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
4803 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4804 legal = true;
4805 }
4806 } else if (_major_version < JAVA_1_5_VERSION) {
4807 const char* p;
4808 p = skip_over_field_name(bytes, false, length);
4809 legal = (p != nullptr) && ((p - bytes) == (int)length);
4810 } else {
4811 // 4881221: relax the constraints based on JSR202 spec
4812 legal = verify_unqualified_name(bytes, length, LegalMethod);
4813 }
4814 }
4815
4816 if (!legal) {
4817 ResourceMark rm(THREAD);
4818 assert(_class_name != nullptr, "invariant");
4819 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4820 Exceptions::fthrow(
4821 THREAD_AND_LOCATION,
4822 vmSymbols::java_lang_ClassFormatError(),
4823 "Illegal method name \"%.*s\" in class %s", length, bytes,
4824 _class_name->as_C_string()
4825 );
4826 return;
4827 }
4828 }
4829
4830
4831 // Checks if signature is a legal field signature.
4832 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
4833 const Symbol* signature,
4834 TRAPS) const {
4835 if (!_need_verify) { return; }
4836
4837 const char* const bytes = (const char*)signature->bytes();
4838 const unsigned int length = signature->utf8_length();
4839 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
4840
4841 if (p == nullptr || (p - bytes) != (int)length) {
4842 throwIllegalSignature("Field", name, signature, CHECK);
4843 }
4844 }
4845
4846 // Check that the signature is compatible with the method name. For example,
4847 // check that <init> has a void signature.
4848 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
4849 const Symbol* signature,
4850 TRAPS) const {
4851 if (!_need_verify) {
4852 return;
4853 }
4854
4855 // Class initializers cannot have args for class format version >= 51.
4856 if (name == vmSymbols::class_initializer_name() &&
4857 signature != vmSymbols::void_method_signature() &&
4858 _major_version >= JAVA_7_VERSION) {
4859 throwIllegalSignature("Method", name, signature, THREAD);
4860 return;
4861 }
4862
4863 int sig_length = signature->utf8_length();
4864 if (name->utf8_length() > 0 &&
4865 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
4866 sig_length > 0 &&
4867 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
4868 throwIllegalSignature("Method", name, signature, THREAD);
4869 }
4870 }
4871
4872 // Checks if signature is a legal method signature.
4873 // Returns number of parameters
4874 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
4875 const Symbol* signature,
4876 TRAPS) const {
4877 if (!_need_verify) {
4878 // make sure caller's args_size will be less than 0 even for non-static
4879 // method so it will be recomputed in compute_size_of_parameters().
4880 return -2;
4881 }
4882
4883 unsigned int args_size = 0;
4884 const char* p = (const char*)signature->bytes();
4885 unsigned int length = signature->utf8_length();
4886 const char* nextp;
4887
4888 // The first character must be a '('
4889 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4890 length--;
4891 // Skip over legal field signatures
4892 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4893 while ((length > 0) && (nextp != nullptr)) {
4894 args_size++;
4895 if (p[0] == 'J' || p[0] == 'D') {
4896 args_size++;
4897 }
4898 length -= pointer_delta_as_int(nextp, p);
4899 p = nextp;
4900 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4901 }
4902 // The first non-signature thing better be a ')'
4903 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4904 length--;
4905 // Now we better just have a return value
4906 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4907 if (nextp && ((int)length == (nextp - p))) {
4908 return args_size;
4909 }
4910 }
4911 }
4912 // Report error
4913 throwIllegalSignature("Method", name, signature, THREAD);
4914 return 0;
4915 }
4916
4917 int ClassFileParser::static_field_size() const {
4918 assert(_field_info != nullptr, "invariant");
4919 return _field_info->_static_field_size;
4920 }
4921
4922 int ClassFileParser::total_oop_map_count() const {
4923 assert(_field_info != nullptr, "invariant");
4924 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
4925 }
4926
4927 jint ClassFileParser::layout_size() const {
4928 assert(_field_info != nullptr, "invariant");
4929 return _field_info->_instance_size;
4930 }
4931
4932 int ClassFileParser::hash_offset() const {
4933 return _field_info->_hash_offset;
4934 }
4935
4936 static void check_methods_for_intrinsics(const InstanceKlass* ik,
4937 const Array<Method*>* methods) {
4938 assert(ik != nullptr, "invariant");
4939 assert(methods != nullptr, "invariant");
4940
4941 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4942 // (We used to do this lazily, but now we query it in Rewriter,
4943 // which is eagerly done for every method, so we might as well do it now,
4944 // when everything is fresh in memory.)
4945 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
4946
4947 if (klass_id != vmSymbolID::NO_SID) {
4948 for (int j = 0; j < methods->length(); ++j) {
4949 Method* method = methods->at(j);
4950 method->init_intrinsic_id(klass_id);
4951
4952 if (CheckIntrinsics) {
4953 // Check if an intrinsic is defined for method 'method',
4954 // but the method is not annotated with @IntrinsicCandidate.
4955 if (method->intrinsic_id() != vmIntrinsics::_none &&
4956 !method->intrinsic_candidate()) {
4957 tty->print("Compiler intrinsic is defined for method [%s], "
4958 "but the method is not annotated with @IntrinsicCandidate.%s",
4959 method->name_and_sig_as_C_string(),
4960 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
4961 );
4962 tty->cr();
4963 DEBUG_ONLY(vm_exit(1));
4964 }
4965 // Check is the method 'method' is annotated with @IntrinsicCandidate,
4966 // but there is no intrinsic available for it.
4967 if (method->intrinsic_candidate() &&
4968 method->intrinsic_id() == vmIntrinsics::_none) {
4969 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
4970 "but no compiler intrinsic is defined for the method.%s",
4971 method->name_and_sig_as_C_string(),
4972 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4973 );
4974 tty->cr();
4975 DEBUG_ONLY(vm_exit(1));
4976 }
4977 }
4978 } // end for
4979
4980 #ifdef ASSERT
4981 if (CheckIntrinsics) {
4982 // Check for orphan methods in the current class. A method m
4983 // of a class C is orphan if an intrinsic is defined for method m,
4984 // but class C does not declare m.
4985 // The check is potentially expensive, therefore it is available
4986 // only in debug builds.
4987
4988 for (auto id : EnumRange<vmIntrinsicID>{}) {
4989 if (vmIntrinsics::_compiledLambdaForm == id) {
4990 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
4991 // generated for the JVM from a LambdaForm and therefore no method
4992 // is defined for it.
4993 continue;
4994 }
4995 if (vmIntrinsics::_blackhole == id) {
4996 // The _blackhole intrinsic is a special marker. No explicit method
4997 // is defined for it.
4998 continue;
4999 }
5000
5001 if (vmIntrinsics::class_for(id) == klass_id) {
5002 // Check if the current class contains a method with the same
5003 // name, flags, signature.
5004 bool match = false;
5005 for (int j = 0; j < methods->length(); ++j) {
5006 const Method* method = methods->at(j);
5007 if (method->intrinsic_id() == id) {
5008 match = true;
5009 break;
5010 }
5011 }
5012
5013 if (!match) {
5014 char buf[1000];
5015 tty->print("Compiler intrinsic is defined for method [%s], "
5016 "but the method is not available in class [%s].%s",
5017 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
5018 ik->name()->as_C_string(),
5019 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5020 );
5021 tty->cr();
5022 DEBUG_ONLY(vm_exit(1));
5023 }
5024 }
5025 } // end for
5026 } // CheckIntrinsics
5027 #endif // ASSERT
5028 }
5029 }
5030
5031 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5032 const ClassInstanceInfo& cl_inst_info,
5033 TRAPS) {
5034 if (_klass != nullptr) {
5035 return _klass;
5036 }
5037
5038 InstanceKlass* const ik =
5039 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5040
5041 if (is_hidden()) {
5042 mangle_hidden_class_name(ik);
5043 }
5044
5045 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5046
5047 assert(_klass == ik, "invariant");
5048
5049 return ik;
5050 }
5051
5052 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5053 bool changed_by_loadhook,
5054 const ClassInstanceInfo& cl_inst_info,
5055 TRAPS) {
5056 assert(ik != nullptr, "invariant");
5057
5058 // Set name and CLD before adding to CLD
5059 ik->set_class_loader_data(_loader_data);
5060 ik->set_class_loader_type();
5061 ik->set_name(_class_name);
5062
5063 // Add all classes to our internal class loader list here,
5064 // including classes in the bootstrap (null) class loader.
5065 const bool publicize = !is_internal();
5066
5067 _loader_data->add_class(ik, publicize);
5068
5069 set_klass_to_deallocate(ik);
5070
5071 assert(_field_info != nullptr, "invariant");
5072 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5073 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5074 "sanity");
5075
5076 assert(ik->is_instance_klass(), "sanity");
5077 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5078
5079 // Fill in information already parsed
5080 ik->set_should_verify_class(_need_verify);
5081
5082 // Not yet: supers are done below to support the new subtype-checking fields
5083 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5084 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5085 ik->set_static_oop_field_count(_static_oop_count);
5086
5087 // this transfers ownership of a lot of arrays from
5088 // the parser onto the InstanceKlass*
5089 apply_parsed_class_metadata(ik, _java_fields_count);
5090
5091 // can only set dynamic nest-host after static nest information is set
5092 if (cl_inst_info.dynamic_nest_host() != nullptr) {
5093 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5094 }
5095
5096 // note that is not safe to use the fields in the parser from this point on
5097 assert(nullptr == _cp, "invariant");
5098 assert(nullptr == _fieldinfo_stream, "invariant");
5099 assert(nullptr == _fieldinfo_search_table, "invariant");
5100 assert(nullptr == _fields_status, "invariant");
5101 assert(nullptr == _methods, "invariant");
5102 assert(nullptr == _inner_classes, "invariant");
5103 assert(nullptr == _nest_members, "invariant");
5104 assert(nullptr == _combined_annotations, "invariant");
5105 assert(nullptr == _record_components, "invariant");
5106 assert(nullptr == _permitted_subclasses, "invariant");
5107
5108 if (_has_localvariable_table) {
5109 ik->set_has_localvariable_table(true);
5110 }
5111
5112 if (_has_final_method) {
5113 ik->set_has_final_method();
5114 }
5115
5116 ik->copy_method_ordering(_method_ordering, CHECK);
5117 // The InstanceKlass::_methods_jmethod_ids cache
5118 // is managed on the assumption that the initial cache
5119 // size is equal to the number of methods in the class. If
5120 // that changes, then InstanceKlass::idnum_can_increment()
5121 // has to be changed accordingly.
5122 ik->set_initial_method_idnum(checked_cast<u2>(ik->methods()->length()));
5123
5124 ik->set_this_class_index(_this_class_index);
5125
5126 if (_is_hidden) {
5127 // _this_class_index is a CONSTANT_Class entry that refers to this
5128 // hidden class itself. If this class needs to refer to its own methods
5129 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5130 // _this_class_index. However, because this class is hidden (it's
5131 // not stored in SystemDictionary), _this_class_index cannot be resolved
5132 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5133 // Therefore, we must eagerly resolve _this_class_index now.
5134 ik->constants()->klass_at_put(_this_class_index, ik);
5135 }
5136
5137 ik->set_minor_version(_minor_version);
5138 ik->set_major_version(_major_version);
5139 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5140 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5141
5142 assert(!_is_hidden || ik->is_hidden(), "must be set already");
5143
5144 // Set PackageEntry for this_klass
5145 oop cl = ik->class_loader();
5146 Handle clh = Handle(THREAD, cl);
5147 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5148 ik->set_package(cld, nullptr, CHECK);
5149
5150 const Array<Method*>* const methods = ik->methods();
5151 assert(methods != nullptr, "invariant");
5152 const int methods_len = methods->length();
5153
5154 check_methods_for_intrinsics(ik, methods);
5155
5156 // Fill in field values obtained by parse_classfile_attributes
5157 if (_parsed_annotations->has_any_annotations())
5158 _parsed_annotations->apply_to(ik);
5159
5160 apply_parsed_class_attributes(ik);
5161
5162 // Miranda methods
5163 if ((_num_miranda_methods > 0) ||
5164 // if this class introduced new miranda methods or
5165 (_super_klass != nullptr && _super_klass->has_miranda_methods())
5166 // super class exists and this class inherited miranda methods
5167 ) {
5168 ik->set_has_miranda_methods(); // then set a flag
5169 }
5170
5171 // Fill in information needed to compute superclasses.
5172 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5173 ik->set_transitive_interfaces(_transitive_interfaces);
5174 ik->set_local_interfaces(_local_interfaces);
5175 _transitive_interfaces = nullptr;
5176 _local_interfaces = nullptr;
5177
5178 // Initialize itable offset tables
5179 klassItable::setup_itable_offset_table(ik);
5180
5181 // Compute transitive closure of interfaces this class implements
5182 // Do final class setup
5183 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5184 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5185 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5186 }
5187
5188 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5189 ( _super_klass != nullptr && _super_klass->has_contended_annotations())) {
5190 ik->set_has_contended_annotations(true);
5191 }
5192
5193 // Fill in has_finalizer and layout_helper
5194 set_precomputed_flags(ik);
5195
5196 // check if this class can access its super class
5197 check_super_class_access(ik, CHECK);
5198
5199 // check if this class can access its superinterfaces
5200 check_super_interface_access(ik, CHECK);
5201
5202 // check if this class overrides any final method
5203 check_final_method_override(ik, CHECK);
5204
5205 // reject static interface methods prior to Java 8
5206 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5207 check_illegal_static_method(ik, CHECK);
5208 }
5209
5210 // Obtain this_klass' module entry
5211 ModuleEntry* module_entry = ik->module();
5212 assert(module_entry != nullptr, "module_entry should always be set");
5213
5214 // Obtain java.lang.Module
5215 Handle module_handle(THREAD, module_entry->module_oop());
5216
5217 // Allocate mirror and initialize static fields
5218 java_lang_Class::create_mirror(ik,
5219 Handle(THREAD, _loader_data->class_loader()),
5220 module_handle,
5221 _protection_domain,
5222 cl_inst_info.class_data(),
5223 CHECK);
5224
5225 assert(_all_mirandas != nullptr, "invariant");
5226
5227 // Generate any default methods - default methods are public interface methods
5228 // that have a default implementation. This is new with Java 8.
5229 if (_has_nonstatic_concrete_methods) {
5230 DefaultMethods::generate_default_methods(ik,
5231 _all_mirandas,
5232 CHECK);
5233 }
5234
5235 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5236 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5237 !module_entry->has_default_read_edges()) {
5238 if (!module_entry->set_has_default_read_edges()) {
5239 // We won a potential race
5240 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5241 }
5242 }
5243
5244 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5245
5246 if (!is_internal()) {
5247 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5248
5249 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5250 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5251 log_is_enabled(Info, class, preview)) {
5252 ResourceMark rm;
5253 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5254 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5255 }
5256
5257 if (log_is_enabled(Debug, class, resolve)) {
5258 ResourceMark rm;
5259 // print out the superclass.
5260 const char * from = ik->external_name();
5261 if (ik->super() != nullptr) {
5262 log_debug(class, resolve)("%s %s (super)",
5263 from,
5264 ik->super()->external_name());
5265 }
5266 // print out each of the interface classes referred to by this class.
5267 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5268 if (local_interfaces != nullptr) {
5269 const int length = local_interfaces->length();
5270 for (int i = 0; i < length; i++) {
5271 const InstanceKlass* const k = local_interfaces->at(i);
5272 const char * to = k->external_name();
5273 log_debug(class, resolve)("%s %s (interface)", from, to);
5274 }
5275 }
5276 }
5277 }
5278
5279 JFR_ONLY(INIT_ID(ik);)
5280
5281 // If we reach here, all is well.
5282 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5283 // in order for it to not be destroyed in the ClassFileParser destructor.
5284 set_klass_to_deallocate(nullptr);
5285
5286 // it's official
5287 set_klass(ik);
5288
5289 DEBUG_ONLY(ik->verify();)
5290 }
5291
5292 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5293 // Decrement the refcount in the old name, since we're clobbering it.
5294 _class_name->decrement_refcount();
5295
5296 _class_name = new_class_name;
5297 // Increment the refcount of the new name.
5298 // Now the ClassFileParser owns this name and will decrement in
5299 // the destructor.
5300 _class_name->increment_refcount();
5301 }
5302
5303 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5304 Symbol* name,
5305 ClassLoaderData* loader_data,
5306 const ClassLoadInfo* cl_info,
5307 Publicity pub_level,
5308 TRAPS) :
5309 _stream(stream),
5310 _class_name(nullptr),
5311 _loader_data(loader_data),
5312 _is_hidden(cl_info->is_hidden()),
5313 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5314 _orig_cp_size(0),
5315 _static_oop_count(0),
5316 _super_klass(),
5317 _cp(nullptr),
5318 _fieldinfo_stream(nullptr),
5319 _fieldinfo_search_table(nullptr),
5320 _fields_status(nullptr),
5321 _methods(nullptr),
5322 _inner_classes(nullptr),
5323 _nest_members(nullptr),
5324 _nest_host(0),
5325 _permitted_subclasses(nullptr),
5326 _record_components(nullptr),
5327 _local_interfaces(nullptr),
5328 _transitive_interfaces(nullptr),
5329 _combined_annotations(nullptr),
5330 _class_annotations(nullptr),
5331 _class_type_annotations(nullptr),
5332 _fields_annotations(nullptr),
5333 _fields_type_annotations(nullptr),
5334 _klass(nullptr),
5335 _klass_to_deallocate(nullptr),
5336 _parsed_annotations(nullptr),
5337 _field_info(nullptr),
5338 _temp_field_info(nullptr),
5339 _method_ordering(nullptr),
5340 _all_mirandas(nullptr),
5341 _vtable_size(0),
5342 _itable_size(0),
5343 _num_miranda_methods(0),
5344 _protection_domain(cl_info->protection_domain()),
5345 _access_flags(),
5346 _pub_level(pub_level),
5347 _bad_constant_seen(0),
5348 _synthetic_flag(false),
5349 _sde_length(false),
5350 _sde_buffer(nullptr),
5351 _sourcefile_index(0),
5352 _generic_signature_index(0),
5353 _major_version(0),
5354 _minor_version(0),
5355 _this_class_index(0),
5356 _super_class_index(0),
5357 _itfs_len(0),
5358 _java_fields_count(0),
5359 _need_verify(false),
5360 _has_nonstatic_concrete_methods(false),
5361 _declares_nonstatic_concrete_methods(false),
5362 _has_localvariable_table(false),
5363 _has_final_method(false),
5364 _has_contended_fields(false),
5365 _has_aot_runtime_setup_method(false),
5366 _has_finalizer(false),
5367 _has_empty_finalizer(false),
5368 _max_bootstrap_specifier_index(-1) {
5369
5370 _class_name = name != nullptr ? name : vmSymbols::unknown_class_name();
5371 _class_name->increment_refcount();
5372
5373 assert(_loader_data != nullptr, "invariant");
5374 assert(stream != nullptr, "invariant");
5375 assert(_stream != nullptr, "invariant");
5376 assert(_stream->buffer() == _stream->current(), "invariant");
5377 assert(_class_name != nullptr, "invariant");
5378 assert(0 == _access_flags.as_unsigned_short(), "invariant");
5379
5380 // Figure out whether we can skip format checking (matching classic VM behavior)
5381 // Always verify CFLH bytes from the user agents.
5382 _need_verify = stream->from_class_file_load_hook() ? true : Verifier::should_verify_for(_loader_data->class_loader());
5383
5384 // synch back verification state to stream to check for truncation.
5385 stream->set_need_verify(_need_verify);
5386
5387 parse_stream(stream, CHECK);
5388
5389 post_process_parsed_stream(stream, _cp, CHECK);
5390 }
5391
5392 void ClassFileParser::clear_class_metadata() {
5393 // metadata created before the instance klass is created. Must be
5394 // deallocated if classfile parsing returns an error.
5395 _cp = nullptr;
5396 _fieldinfo_stream = nullptr;
5397 _fieldinfo_search_table = nullptr;
5398 _fields_status = nullptr;
5399 _methods = nullptr;
5400 _inner_classes = nullptr;
5401 _nest_members = nullptr;
5402 _permitted_subclasses = nullptr;
5403 _combined_annotations = nullptr;
5404 _class_annotations = _class_type_annotations = nullptr;
5405 _fields_annotations = _fields_type_annotations = nullptr;
5406 _record_components = nullptr;
5407 }
5408
5409 // Destructor to clean up
5410 ClassFileParser::~ClassFileParser() {
5411 _class_name->decrement_refcount();
5412
5413 if (_cp != nullptr) {
5414 MetadataFactory::free_metadata(_loader_data, _cp);
5415 }
5416
5417 if (_fieldinfo_stream != nullptr) {
5418 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_stream);
5419 }
5420 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_search_table);
5421
5422 if (_fields_status != nullptr) {
5423 MetadataFactory::free_array<FieldStatus>(_loader_data, _fields_status);
5424 }
5425
5426 if (_methods != nullptr) {
5427 // Free methods
5428 InstanceKlass::deallocate_methods(_loader_data, _methods);
5429 }
5430
5431 // beware of the Universe::empty_blah_array!!
5432 if (_inner_classes != nullptr && _inner_classes != Universe::the_empty_short_array()) {
5433 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5434 }
5435
5436 if (_nest_members != nullptr && _nest_members != Universe::the_empty_short_array()) {
5437 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5438 }
5439
5440 if (_record_components != nullptr) {
5441 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5442 }
5443
5444 if (_permitted_subclasses != nullptr && _permitted_subclasses != Universe::the_empty_short_array()) {
5445 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5446 }
5447
5448 // Free interfaces
5449 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5450 _local_interfaces, _transitive_interfaces);
5451
5452 if (_combined_annotations != nullptr) {
5453 // After all annotations arrays have been created, they are installed into the
5454 // Annotations object that will be assigned to the InstanceKlass being created.
5455
5456 // Deallocate the Annotations object and the installed annotations arrays.
5457 _combined_annotations->deallocate_contents(_loader_data);
5458
5459 // If the _combined_annotations pointer is non-null,
5460 // then the other annotations fields should have been cleared.
5461 assert(_class_annotations == nullptr, "Should have been cleared");
5462 assert(_class_type_annotations == nullptr, "Should have been cleared");
5463 assert(_fields_annotations == nullptr, "Should have been cleared");
5464 assert(_fields_type_annotations == nullptr, "Should have been cleared");
5465 } else {
5466 // If the annotations arrays were not installed into the Annotations object,
5467 // then they have to be deallocated explicitly.
5468 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5469 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5470 Annotations::free_contents(_loader_data, _fields_annotations);
5471 Annotations::free_contents(_loader_data, _fields_type_annotations);
5472 }
5473
5474 clear_class_metadata();
5475 _transitive_interfaces = nullptr;
5476 _local_interfaces = nullptr;
5477
5478 // deallocate the klass if already created. Don't directly deallocate, but add
5479 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5480 // at a safepoint.
5481 if (_klass_to_deallocate != nullptr) {
5482 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5483 }
5484 }
5485
5486 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5487 TRAPS) {
5488
5489 assert(stream != nullptr, "invariant");
5490 assert(_class_name != nullptr, "invariant");
5491
5492 // BEGIN STREAM PARSING
5493 stream->guarantee_more(8, CHECK); // magic, major, minor
5494 // Magic value
5495 const u4 magic = stream->get_u4_fast();
5496 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5497 "Incompatible magic value %u in class file %s",
5498 magic, CHECK);
5499
5500 // Version numbers
5501 _minor_version = stream->get_u2_fast();
5502 _major_version = stream->get_u2_fast();
5503
5504 // Check version numbers - we check this even with verifier off
5505 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5506
5507 stream->guarantee_more(3, CHECK); // length, first cp tag
5508 u2 cp_size = stream->get_u2_fast();
5509
5510 guarantee_property(
5511 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5512 cp_size, CHECK);
5513
5514 _orig_cp_size = cp_size;
5515 if (is_hidden()) { // Add a slot for hidden class name.
5516 guarantee_property((u4)cp_size < 0xffff, "Overflow in constant pool size for hidden class %s", CHECK);
5517 cp_size++;
5518 }
5519
5520 _cp = ConstantPool::allocate(_loader_data,
5521 cp_size,
5522 CHECK);
5523
5524 ConstantPool* const cp = _cp;
5525
5526 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
5527
5528 assert(cp_size == (u2)cp->length(), "invariant");
5529
5530 // ACCESS FLAGS
5531 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5532
5533 // Access flags
5534 u2 flags;
5535 // JVM_ACC_MODULE is defined in JDK-9 and later.
5536 if (_major_version >= JAVA_9_VERSION) {
5537 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5538 } else {
5539 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5540 }
5541
5542 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5543 // Set abstract bit for old class files for backward compatibility
5544 flags |= JVM_ACC_ABSTRACT;
5545 }
5546
5547 verify_legal_class_modifiers(flags, nullptr, false, CHECK);
5548
5549 short bad_constant = class_bad_constant_seen();
5550 if (bad_constant != 0) {
5551 // Do not throw CFE until after the access_flags are checked because if
5552 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5553 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5554 return;
5555 }
5556
5557 _access_flags.set_flags(flags);
5558
5559 // This class and superclass
5560 _this_class_index = stream->get_u2_fast();
5561 guarantee_property(
5562 valid_cp_range(_this_class_index, cp_size) &&
5563 cp->tag_at(_this_class_index).is_unresolved_klass(),
5564 "Invalid this class index %u in constant pool in class file %s",
5565 _this_class_index, CHECK);
5566
5567 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5568 assert(class_name_in_cp != nullptr, "class_name can't be null");
5569
5570 // Don't need to check whether this class name is legal or not.
5571 // It has been checked when constant pool is parsed.
5572 // However, make sure it is not an array type.
5573 if (_need_verify) {
5574 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
5575 "Bad class name in class file %s",
5576 CHECK);
5577 }
5578
5579 #ifdef ASSERT
5580 // Basic sanity checks
5581 if (_is_hidden) {
5582 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
5583 }
5584 #endif
5585
5586 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
5587
5588 if (_is_hidden) {
5589 assert(_class_name != nullptr, "Unexpected null _class_name");
5590 #ifdef ASSERT
5591 if (_need_verify) {
5592 verify_legal_class_name(_class_name, CHECK);
5593 }
5594 #endif
5595
5596 } else {
5597 // Check if name in class file matches given name
5598 if (_class_name != class_name_in_cp) {
5599 if (_class_name != vmSymbols::unknown_class_name()) {
5600 ResourceMark rm(THREAD);
5601 // Names are all known to be < 64k so we know this formatted message is not excessively large.
5602 Exceptions::fthrow(THREAD_AND_LOCATION,
5603 vmSymbols::java_lang_NoClassDefFoundError(),
5604 "%s (wrong name: %s)",
5605 _class_name->as_C_string(),
5606 class_name_in_cp->as_C_string()
5607 );
5608 return;
5609 } else {
5610 // The class name was not known by the caller so we set it from
5611 // the value in the CP.
5612 update_class_name(class_name_in_cp);
5613 }
5614 // else nothing to do: the expected class name matches what is in the CP
5615 }
5616 }
5617
5618 // Verification prevents us from creating names with dots in them, this
5619 // asserts that that's the case.
5620 assert(is_internal_format(_class_name), "external class name format used internally");
5621
5622 if (!is_internal()) {
5623 LogTarget(Debug, class, preorder) lt;
5624 if (lt.is_enabled()){
5625 ResourceMark rm(THREAD);
5626 LogStream ls(lt);
5627 ls.print("%s", _class_name->as_klass_external_name());
5628 if (stream->source() != nullptr) {
5629 ls.print(" source: %s", stream->source());
5630 }
5631 ls.cr();
5632 }
5633 }
5634
5635 // SUPERKLASS
5636 _super_class_index = stream->get_u2_fast();
5637 check_super_class(cp,
5638 _super_class_index,
5639 _need_verify,
5640 CHECK);
5641
5642 // Interfaces
5643 _itfs_len = stream->get_u2_fast();
5644 parse_interfaces(stream,
5645 _itfs_len,
5646 cp,
5647 &_has_nonstatic_concrete_methods,
5648 CHECK);
5649
5650 assert(_local_interfaces != nullptr, "invariant");
5651
5652 // Fields (offsets are filled in later)
5653 parse_fields(stream,
5654 _access_flags.is_interface(),
5655 cp,
5656 cp_size,
5657 &_java_fields_count,
5658 CHECK);
5659
5660 assert(_temp_field_info != nullptr, "invariant");
5661
5662 // Methods
5663 parse_methods(stream,
5664 _access_flags.is_interface(),
5665 &_has_localvariable_table,
5666 &_has_final_method,
5667 &_declares_nonstatic_concrete_methods,
5668 CHECK);
5669
5670 assert(_methods != nullptr, "invariant");
5671
5672 if (_declares_nonstatic_concrete_methods) {
5673 _has_nonstatic_concrete_methods = true;
5674 }
5675
5676 // Additional attributes/annotations
5677 _parsed_annotations = new ClassAnnotationCollector();
5678 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5679
5680 assert(_inner_classes != nullptr, "invariant");
5681
5682 // Finalize the Annotations metadata object,
5683 // now that all annotation arrays have been created.
5684 create_combined_annotations(CHECK);
5685
5686 // Make sure this is the end of class file stream
5687 guarantee_property(stream->at_eos(),
5688 "Extra bytes at the end of class file %s",
5689 CHECK);
5690
5691 // all bytes in stream read and parsed
5692 }
5693
5694 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
5695 ResourceMark rm;
5696 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
5697 // use a '/' because that confuses finding the class's package. Also, can't
5698 // use an illegal char such as ';' because that causes serialization issues
5699 // and issues with hidden classes that create their own hidden classes.
5700 char addr_buf[20];
5701 if (CDSConfig::is_dumping_static_archive()) {
5702 // We want stable names for the archived hidden classes (only for static
5703 // archive for now). Spaces under default_SharedBaseAddress() will be
5704 // occupied by the archive at run time, so we know that no dynamically
5705 // loaded InstanceKlass will be placed under there.
5706 static volatile size_t counter = 0;
5707 AtomicAccess::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
5708 size_t new_id = AtomicAccess::add(&counter, (size_t)1);
5709 jio_snprintf(addr_buf, 20, "0x%zx", new_id);
5710 } else {
5711 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
5712 }
5713 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
5714 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
5715 jio_snprintf(new_name, new_name_len, "%s+%s",
5716 _class_name->as_C_string(), addr_buf);
5717 update_class_name(SymbolTable::new_symbol(new_name));
5718
5719 // Add a Utf8 entry containing the hidden name.
5720 assert(_class_name != nullptr, "Unexpected null _class_name");
5721 int hidden_index = _orig_cp_size; // this is an extra slot we added
5722 _cp->symbol_at_put(hidden_index, _class_name);
5723
5724 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
5725 // We have to update the resolved_klass_index and the name_index together
5726 // so extract the existing resolved_klass_index first.
5727 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
5728 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
5729 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
5730 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
5731 "Bad name_index");
5732 }
5733
5734 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5735 ConstantPool* cp,
5736 TRAPS) {
5737 assert(stream != nullptr, "invariant");
5738 assert(stream->at_eos(), "invariant");
5739 assert(cp != nullptr, "invariant");
5740 assert(_loader_data != nullptr, "invariant");
5741
5742 if (_class_name == vmSymbols::java_lang_Object()) {
5743 precond(_super_class_index == 0);
5744 precond(_super_klass == nullptr);
5745 guarantee_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
5746 "java.lang.Object cannot implement an interface in class file %s",
5747 CHECK);
5748 } else {
5749 // Set _super_klass after class file is parsed and format is checked
5750 assert(_super_class_index > 0, "any class other than Object must have a super class");
5751 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5752 if (_access_flags.is_interface()) {
5753 // Before attempting to resolve the superclass, check for class format
5754 // errors not checked yet.
5755 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5756 "Interfaces must have java.lang.Object as superclass in class file %s",
5757 CHECK);
5758 }
5759 Handle loader(THREAD, _loader_data->class_loader());
5760 if (loader.is_null() && super_class_name == vmSymbols::java_lang_Object()) {
5761 // fast path to avoid lookup
5762 _super_klass = vmClasses::Object_klass();
5763 } else {
5764 _super_klass = (const InstanceKlass*)
5765 SystemDictionary::resolve_super_or_fail(_class_name,
5766 super_class_name,
5767 loader,
5768 true,
5769 CHECK);
5770 }
5771 }
5772
5773 if (_super_klass != nullptr) {
5774 if (_super_klass->has_nonstatic_concrete_methods()) {
5775 _has_nonstatic_concrete_methods = true;
5776 }
5777
5778 if (_super_klass->is_interface()) {
5779 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
5780 return;
5781 }
5782 }
5783
5784 // Compute the transitive list of all unique interfaces implemented by this class
5785 _transitive_interfaces =
5786 compute_transitive_interfaces(_super_klass,
5787 _local_interfaces,
5788 _loader_data,
5789 CHECK);
5790
5791 assert(_transitive_interfaces != nullptr, "invariant");
5792
5793 // sort methods
5794 _method_ordering = sort_methods(_methods);
5795
5796 _all_mirandas = new GrowableArray<Method*>(20);
5797
5798 Handle loader(THREAD, _loader_data->class_loader());
5799 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5800 &_num_miranda_methods,
5801 _all_mirandas,
5802 _super_klass,
5803 _methods,
5804 _access_flags,
5805 _major_version,
5806 loader,
5807 _class_name,
5808 _local_interfaces);
5809
5810 // Size of Java itable (in words)
5811 _itable_size = _access_flags.is_interface() ? 0 :
5812 klassItable::compute_itable_size(_transitive_interfaces);
5813
5814 assert(_parsed_annotations != nullptr, "invariant");
5815
5816 _field_info = new FieldLayoutInfo();
5817 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, /*_fields*/ _temp_field_info,
5818 _parsed_annotations->is_contended(), _field_info);
5819 lb.build_layout();
5820
5821 int injected_fields_count = _temp_field_info->length() - _java_fields_count;
5822 _fieldinfo_stream =
5823 FieldInfoStream::create_FieldInfoStream(_temp_field_info, _java_fields_count,
5824 injected_fields_count, loader_data(), CHECK);
5825 _fieldinfo_search_table = FieldInfoStream::create_search_table(_cp, _fieldinfo_stream, _loader_data, CHECK);
5826 _fields_status =
5827 MetadataFactory::new_array<FieldStatus>(_loader_data, _temp_field_info->length(),
5828 FieldStatus(0), CHECK);
5829 }
5830
5831 void ClassFileParser::set_klass(InstanceKlass* klass) {
5832
5833 #ifdef ASSERT
5834 if (klass != nullptr) {
5835 assert(nullptr == _klass, "leaking?");
5836 }
5837 #endif
5838
5839 _klass = klass;
5840 }
5841
5842 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5843
5844 #ifdef ASSERT
5845 if (klass != nullptr) {
5846 assert(nullptr == _klass_to_deallocate, "leaking?");
5847 }
5848 #endif
5849
5850 _klass_to_deallocate = klass;
5851 }
5852
5853 // Caller responsible for ResourceMark
5854 // clone stream with rewound position
5855 const ClassFileStream* ClassFileParser::clone_stream() const {
5856 assert(_stream != nullptr, "invariant");
5857
5858 return _stream->clone();
5859 }
5860
5861 ReferenceType ClassFileParser::super_reference_type() const {
5862 return _super_klass == nullptr ? REF_NONE : _super_klass->reference_type();
5863 }
5864
5865 bool ClassFileParser::is_instance_ref_klass() const {
5866 // Only the subclasses of j.l.r.Reference are InstanceRefKlass.
5867 // j.l.r.Reference itself is InstanceKlass because InstanceRefKlass denotes a
5868 // klass requiring special treatment in ref-processing. The abstract
5869 // j.l.r.Reference cannot be instantiated so doesn't partake in
5870 // ref-processing.
5871 return is_java_lang_ref_Reference_subclass();
5872 }
5873
5874 bool ClassFileParser::is_java_lang_ref_Reference_subclass() const {
5875 if (_super_klass == nullptr) {
5876 return false;
5877 }
5878
5879 if (_super_klass->name() == vmSymbols::java_lang_ref_Reference()) {
5880 // Direct subclass of j.l.r.Reference: Soft|Weak|Final|Phantom
5881 return true;
5882 }
5883
5884 return _super_klass->reference_type() != REF_NONE;
5885 }
5886
5887 // ----------------------------------------------------------------------------
5888 // debugging
5889
5890 #ifdef ASSERT
5891
5892 // return true if class_name contains no '.' (internal format is '/')
5893 bool ClassFileParser::is_internal_format(Symbol* class_name) {
5894 if (class_name != nullptr) {
5895 ResourceMark rm;
5896 char* name = class_name->as_C_string();
5897 return strchr(name, JVM_SIGNATURE_DOT) == nullptr;
5898 } else {
5899 return true;
5900 }
5901 }
5902
5903 #endif