1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "cds/cdsConfig.hpp"
25 #include "classfile/classFileParser.hpp"
26 #include "classfile/classFileStream.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/classLoaderData.inline.hpp"
29 #include "classfile/classLoadInfo.hpp"
30 #include "classfile/defaultMethods.hpp"
31 #include "classfile/fieldLayoutBuilder.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/packageEntry.hpp"
35 #include "classfile/symbolTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/verificationType.hpp"
38 #include "classfile/verifier.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "jvm.h"
42 #include "logging/log.hpp"
43 #include "logging/logStream.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/metadataFactory.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/annotations.hpp"
50 #include "oops/constantPool.inline.hpp"
51 #include "oops/fieldInfo.hpp"
52 #include "oops/fieldStreams.inline.hpp"
53 #include "oops/instanceKlass.inline.hpp"
54 #include "oops/instanceMirrorKlass.hpp"
55 #include "oops/klass.inline.hpp"
56 #include "oops/klassVtable.hpp"
57 #include "oops/metadata.hpp"
58 #include "oops/method.inline.hpp"
59 #include "oops/oop.inline.hpp"
60 #include "oops/recordComponent.hpp"
61 #include "oops/symbol.hpp"
62 #include "prims/jvmtiExport.hpp"
63 #include "prims/jvmtiThreadState.hpp"
64 #include "runtime/arguments.hpp"
65 #include "runtime/fieldDescriptor.inline.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/os.hpp"
69 #include "runtime/perfData.hpp"
70 #include "runtime/reflection.hpp"
71 #include "runtime/safepointVerifiers.hpp"
72 #include "runtime/signature.hpp"
73 #include "runtime/timer.hpp"
74 #include "services/classLoadingService.hpp"
75 #include "services/threadService.hpp"
76 #include "utilities/align.hpp"
77 #include "utilities/bitMap.inline.hpp"
78 #include "utilities/checkedCast.hpp"
79 #include "utilities/copy.hpp"
80 #include "utilities/formatBuffer.hpp"
81 #include "utilities/exceptions.hpp"
82 #include "utilities/globalDefinitions.hpp"
83 #include "utilities/growableArray.hpp"
84 #include "utilities/macros.hpp"
85 #include "utilities/ostream.hpp"
86 #include "utilities/resourceHash.hpp"
87 #include "utilities/utf8.hpp"
88 #if INCLUDE_CDS
89 #include "classfile/systemDictionaryShared.hpp"
90 #endif
91 #if INCLUDE_JFR
92 #include "jfr/support/jfrTraceIdExtension.hpp"
93 #endif
94
95 // We generally try to create the oops directly when parsing, rather than
96 // allocating temporary data structures and copying the bytes twice. A
97 // temporary area is only needed when parsing utf8 entries in the constant
98 // pool and when parsing line number tables.
99
100 // We add assert in debug mode when class format is not checked.
101
102 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
103 #define JAVA_MIN_SUPPORTED_VERSION 45
104 #define JAVA_PREVIEW_MINOR_VERSION 65535
105
106 // Used for two backward compatibility reasons:
107 // - to check for new additions to the class file format in JDK1.5
108 // - to check for bug fixes in the format checker in JDK1.5
109 #define JAVA_1_5_VERSION 49
110
111 // Used for backward compatibility reasons:
112 // - to check for javac bug fixes that happened after 1.5
113 // - also used as the max version when running in jdk6
114 #define JAVA_6_VERSION 50
115
116 // Used for backward compatibility reasons:
117 // - to disallow argument and require ACC_STATIC for <clinit> methods
118 #define JAVA_7_VERSION 51
119
120 // Extension method support.
121 #define JAVA_8_VERSION 52
122
123 #define JAVA_9_VERSION 53
124
125 #define JAVA_10_VERSION 54
126
127 #define JAVA_11_VERSION 55
128
129 #define JAVA_12_VERSION 56
130
131 #define JAVA_13_VERSION 57
132
133 #define JAVA_14_VERSION 58
134
135 #define JAVA_15_VERSION 59
136
137 #define JAVA_16_VERSION 60
138
139 #define JAVA_17_VERSION 61
140
141 #define JAVA_18_VERSION 62
142
143 #define JAVA_19_VERSION 63
144
145 #define JAVA_20_VERSION 64
146
147 #define JAVA_21_VERSION 65
148
149 #define JAVA_22_VERSION 66
150
151 #define JAVA_23_VERSION 67
152
153 #define JAVA_24_VERSION 68
154
155 #define JAVA_25_VERSION 69
156
157 #define JAVA_26_VERSION 70
158
159 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
160 assert((bad_constant == JVM_CONSTANT_Module ||
161 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
162 "Unexpected bad constant pool entry");
163 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
164 }
165
166 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
167 ConstantPool* cp,
168 const int length,
169 TRAPS) {
170 assert(stream != nullptr, "invariant");
171 assert(cp != nullptr, "invariant");
172
173 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
174 // this function (_current can be allocated in a register, with scalar
175 // replacement of aggregates). The _current pointer is copied back to
176 // stream() when this function returns. DON'T call another method within
177 // this method that uses stream().
178 const ClassFileStream cfs1 = *stream;
179 const ClassFileStream* const cfs = &cfs1;
180
181 DEBUG_ONLY(const u1* const old_current = stream->current();)
182
183 // Used for batching symbol allocations.
184 const char* names[SymbolTable::symbol_alloc_batch_size];
185 int lengths[SymbolTable::symbol_alloc_batch_size];
186 int indices[SymbolTable::symbol_alloc_batch_size];
187 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
188 int names_count = 0;
189
190 // parsing Index 0 is unused
191 for (int index = 1; index < length; index++) {
192 // Each of the following case guarantees one more byte in the stream
193 // for the following tag or the access_flags following constant pool,
194 // so we don't need bounds-check for reading tag.
195 const u1 tag = cfs->get_u1_fast();
196 switch (tag) {
197 case JVM_CONSTANT_Class : {
198 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
199 const u2 name_index = cfs->get_u2_fast();
200 cp->klass_index_at_put(index, name_index);
201 break;
202 }
203 case JVM_CONSTANT_Fieldref: {
204 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
205 const u2 class_index = cfs->get_u2_fast();
206 const u2 name_and_type_index = cfs->get_u2_fast();
207 cp->field_at_put(index, class_index, name_and_type_index);
208 break;
209 }
210 case JVM_CONSTANT_Methodref: {
211 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
212 const u2 class_index = cfs->get_u2_fast();
213 const u2 name_and_type_index = cfs->get_u2_fast();
214 cp->method_at_put(index, class_index, name_and_type_index);
215 break;
216 }
217 case JVM_CONSTANT_InterfaceMethodref: {
218 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
219 const u2 class_index = cfs->get_u2_fast();
220 const u2 name_and_type_index = cfs->get_u2_fast();
221 cp->interface_method_at_put(index, class_index, name_and_type_index);
222 break;
223 }
224 case JVM_CONSTANT_String : {
225 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
226 const u2 string_index = cfs->get_u2_fast();
227 cp->string_index_at_put(index, string_index);
228 break;
229 }
230 case JVM_CONSTANT_MethodHandle :
231 case JVM_CONSTANT_MethodType: {
232 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
233 classfile_parse_error(
234 "Class file version does not support constant tag %u in class file %s",
235 tag, THREAD);
236 return;
237 }
238 if (tag == JVM_CONSTANT_MethodHandle) {
239 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
240 const u1 ref_kind = cfs->get_u1_fast();
241 const u2 method_index = cfs->get_u2_fast();
242 cp->method_handle_index_at_put(index, ref_kind, method_index);
243 }
244 else if (tag == JVM_CONSTANT_MethodType) {
245 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
246 const u2 signature_index = cfs->get_u2_fast();
247 cp->method_type_index_at_put(index, signature_index);
248 }
249 else {
250 ShouldNotReachHere();
251 }
252 break;
253 }
254 case JVM_CONSTANT_Dynamic : {
255 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
256 classfile_parse_error(
257 "Class file version does not support constant tag %u in class file %s",
258 tag, THREAD);
259 return;
260 }
261 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
262 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
263 const u2 name_and_type_index = cfs->get_u2_fast();
264 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
265 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
266 }
267 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
268 break;
269 }
270 case JVM_CONSTANT_InvokeDynamic : {
271 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
272 classfile_parse_error(
273 "Class file version does not support constant tag %u in class file %s",
274 tag, THREAD);
275 return;
276 }
277 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
278 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
279 const u2 name_and_type_index = cfs->get_u2_fast();
280 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
281 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
282 }
283 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
284 break;
285 }
286 case JVM_CONSTANT_Integer: {
287 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
288 const u4 bytes = cfs->get_u4_fast();
289 cp->int_at_put(index, (jint)bytes);
290 break;
291 }
292 case JVM_CONSTANT_Float: {
293 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
294 const u4 bytes = cfs->get_u4_fast();
295 cp->float_at_put(index, *(jfloat*)&bytes);
296 break;
297 }
298 case JVM_CONSTANT_Long: {
299 // A mangled type might cause you to overrun allocated memory
300 guarantee_property(index + 1 < length,
301 "Invalid constant pool entry %u in class file %s",
302 index,
303 CHECK);
304 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
305 const u8 bytes = cfs->get_u8_fast();
306 cp->long_at_put(index, bytes);
307 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
308 break;
309 }
310 case JVM_CONSTANT_Double: {
311 // A mangled type might cause you to overrun allocated memory
312 guarantee_property(index+1 < length,
313 "Invalid constant pool entry %u in class file %s",
314 index,
315 CHECK);
316 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
317 const u8 bytes = cfs->get_u8_fast();
318 cp->double_at_put(index, *(jdouble*)&bytes);
319 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
320 break;
321 }
322 case JVM_CONSTANT_NameAndType: {
323 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
324 const u2 name_index = cfs->get_u2_fast();
325 const u2 signature_index = cfs->get_u2_fast();
326 cp->name_and_type_at_put(index, name_index, signature_index);
327 break;
328 }
329 case JVM_CONSTANT_Utf8 : {
330 cfs->guarantee_more(2, CHECK); // utf8_length
331 u2 utf8_length = cfs->get_u2_fast();
332 const u1* utf8_buffer = cfs->current();
333 assert(utf8_buffer != nullptr, "null utf8 buffer");
334 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
335 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
336 cfs->skip_u1_fast(utf8_length);
337
338 // Before storing the symbol, make sure it's legal
339 if (_need_verify) {
340 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
341 }
342
343 unsigned int hash;
344 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
345 utf8_length,
346 hash);
347 if (result == nullptr) {
348 names[names_count] = (const char*)utf8_buffer;
349 lengths[names_count] = utf8_length;
350 indices[names_count] = index;
351 hashValues[names_count++] = hash;
352 if (names_count == SymbolTable::symbol_alloc_batch_size) {
353 SymbolTable::new_symbols(_loader_data,
354 constantPoolHandle(THREAD, cp),
355 names_count,
356 names,
357 lengths,
358 indices,
359 hashValues);
360 names_count = 0;
361 }
362 } else {
363 cp->symbol_at_put(index, result);
364 }
365 break;
366 }
367 case JVM_CONSTANT_Module:
368 case JVM_CONSTANT_Package: {
369 // Record that an error occurred in these two cases but keep parsing so
370 // that ACC_Module can be checked for in the access_flags. Need to
371 // throw NoClassDefFoundError in that case.
372 if (_major_version >= JAVA_9_VERSION) {
373 cfs->guarantee_more(3, CHECK);
374 cfs->get_u2_fast();
375 set_class_bad_constant_seen(tag);
376 break;
377 }
378 }
379 default: {
380 classfile_parse_error("Unknown constant tag %u in class file %s",
381 tag,
382 THREAD);
383 return;
384 }
385 } // end of switch(tag)
386 } // end of for
387
388 // Allocate the remaining symbols
389 if (names_count > 0) {
390 SymbolTable::new_symbols(_loader_data,
391 constantPoolHandle(THREAD, cp),
392 names_count,
393 names,
394 lengths,
395 indices,
396 hashValues);
397 }
398
399 // Copy _current pointer of local copy back to stream.
400 assert(stream->current() == old_current, "non-exclusive use of stream");
401 stream->set_current(cfs1.current());
402
403 }
404
405 static inline bool valid_cp_range(int index, int length) {
406 return (index > 0 && index < length);
407 }
408
409 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
410 assert(cp != nullptr, "invariant");
411 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
412 return cp->symbol_at(index);
413 }
414 return nullptr;
415 }
416
417 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
418 ConstantPool* const cp,
419 const int length,
420 TRAPS) {
421 assert(cp != nullptr, "invariant");
422 assert(stream != nullptr, "invariant");
423
424 // parsing constant pool entries
425 parse_constant_pool_entries(stream, cp, length, CHECK);
426 if (class_bad_constant_seen() != 0) {
427 // a bad CP entry has been detected previously so stop parsing and just return.
428 return;
429 }
430
431 int index = 1; // declared outside of loops for portability
432 int num_klasses = 0;
433
434 // first verification pass - validate cross references
435 // and fixup class and string constants
436 for (index = 1; index < length; index++) { // Index 0 is unused
437 const jbyte tag = cp->tag_at(index).value();
438 switch (tag) {
439 case JVM_CONSTANT_Class: {
440 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
441 break;
442 }
443 case JVM_CONSTANT_Fieldref:
444 // fall through
445 case JVM_CONSTANT_Methodref:
446 // fall through
447 case JVM_CONSTANT_InterfaceMethodref: {
448 if (!_need_verify) break;
449 const int klass_ref_index = cp->uncached_klass_ref_index_at(index);
450 const int name_and_type_ref_index = cp->uncached_name_and_type_ref_index_at(index);
451 guarantee_property(valid_klass_reference_at(klass_ref_index),
452 "Invalid constant pool index %u in class file %s",
453 klass_ref_index, CHECK);
454 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
455 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
456 "Invalid constant pool index %u in class file %s",
457 name_and_type_ref_index, CHECK);
458 break;
459 }
460 case JVM_CONSTANT_String: {
461 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
462 break;
463 }
464 case JVM_CONSTANT_Integer:
465 break;
466 case JVM_CONSTANT_Float:
467 break;
468 case JVM_CONSTANT_Long:
469 case JVM_CONSTANT_Double: {
470 index++;
471 guarantee_property(
472 (index < length && cp->tag_at(index).is_invalid()),
473 "Improper constant pool long/double index %u in class file %s",
474 index, CHECK);
475 break;
476 }
477 case JVM_CONSTANT_NameAndType: {
478 if (!_need_verify) break;
479 const int name_ref_index = cp->name_ref_index_at(index);
480 const int signature_ref_index = cp->signature_ref_index_at(index);
481 guarantee_property(valid_symbol_at(name_ref_index),
482 "Invalid constant pool index %u in class file %s",
483 name_ref_index, CHECK);
484 guarantee_property(valid_symbol_at(signature_ref_index),
485 "Invalid constant pool index %u in class file %s",
486 signature_ref_index, CHECK);
487 break;
488 }
489 case JVM_CONSTANT_Utf8:
490 break;
491 case JVM_CONSTANT_UnresolvedClass: // fall-through
492 case JVM_CONSTANT_UnresolvedClassInError: {
493 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
494 break;
495 }
496 case JVM_CONSTANT_ClassIndex: {
497 const int class_index = cp->klass_index_at(index);
498 guarantee_property(valid_symbol_at(class_index),
499 "Invalid constant pool index %u in class file %s",
500 class_index, CHECK);
501 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
502 break;
503 }
504 case JVM_CONSTANT_StringIndex: {
505 const int string_index = cp->string_index_at(index);
506 guarantee_property(valid_symbol_at(string_index),
507 "Invalid constant pool index %u in class file %s",
508 string_index, CHECK);
509 Symbol* const sym = cp->symbol_at(string_index);
510 cp->unresolved_string_at_put(index, sym);
511 break;
512 }
513 case JVM_CONSTANT_MethodHandle: {
514 const int ref_index = cp->method_handle_index_at(index);
515 guarantee_property(valid_cp_range(ref_index, length),
516 "Invalid constant pool index %u in class file %s",
517 ref_index, CHECK);
518 const constantTag tag = cp->tag_at(ref_index);
519 const int ref_kind = cp->method_handle_ref_kind_at(index);
520
521 switch (ref_kind) {
522 case JVM_REF_getField:
523 case JVM_REF_getStatic:
524 case JVM_REF_putField:
525 case JVM_REF_putStatic: {
526 guarantee_property(
527 tag.is_field(),
528 "Invalid constant pool index %u in class file %s (not a field)",
529 ref_index, CHECK);
530 break;
531 }
532 case JVM_REF_invokeVirtual:
533 case JVM_REF_newInvokeSpecial: {
534 guarantee_property(
535 tag.is_method(),
536 "Invalid constant pool index %u in class file %s (not a method)",
537 ref_index, CHECK);
538 break;
539 }
540 case JVM_REF_invokeStatic:
541 case JVM_REF_invokeSpecial: {
542 guarantee_property(
543 tag.is_method() ||
544 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
545 "Invalid constant pool index %u in class file %s (not a method)",
546 ref_index, CHECK);
547 break;
548 }
549 case JVM_REF_invokeInterface: {
550 guarantee_property(
551 tag.is_interface_method(),
552 "Invalid constant pool index %u in class file %s (not an interface method)",
553 ref_index, CHECK);
554 break;
555 }
556 default: {
557 classfile_parse_error(
558 "Bad method handle kind at constant pool index %u in class file %s",
559 index, THREAD);
560 return;
561 }
562 } // switch(refkind)
563 // Keep the ref_index unchanged. It will be indirected at link-time.
564 break;
565 } // case MethodHandle
566 case JVM_CONSTANT_MethodType: {
567 const int ref_index = cp->method_type_index_at(index);
568 guarantee_property(valid_symbol_at(ref_index),
569 "Invalid constant pool index %u in class file %s",
570 ref_index, CHECK);
571 break;
572 }
573 case JVM_CONSTANT_Dynamic: {
574 const int name_and_type_ref_index =
575 cp->bootstrap_name_and_type_ref_index_at(index);
576
577 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
578 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
579 "Invalid constant pool index %u in class file %s",
580 name_and_type_ref_index, CHECK);
581 // bootstrap specifier index must be checked later,
582 // when BootstrapMethods attr is available
583
584 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
585 cp->set_has_dynamic_constant();
586 break;
587 }
588 case JVM_CONSTANT_InvokeDynamic: {
589 const int name_and_type_ref_index =
590 cp->bootstrap_name_and_type_ref_index_at(index);
591
592 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
593 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
594 "Invalid constant pool index %u in class file %s",
595 name_and_type_ref_index, CHECK);
596 // bootstrap specifier index must be checked later,
597 // when BootstrapMethods attr is available
598 break;
599 }
600 default: {
601 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
602 ShouldNotReachHere();
603 break;
604 }
605 } // switch(tag)
606 } // end of for
607
608 cp->allocate_resolved_klasses(_loader_data, num_klasses, CHECK);
609
610 if (!_need_verify) {
611 return;
612 }
613
614 // second verification pass - checks the strings are of the right format.
615 // but not yet to the other entries
616 for (index = 1; index < length; index++) {
617 const jbyte tag = cp->tag_at(index).value();
618 switch (tag) {
619 case JVM_CONSTANT_UnresolvedClass: {
620 const Symbol* const class_name = cp->klass_name_at(index);
621 // check the name
622 verify_legal_class_name(class_name, CHECK);
623 break;
624 }
625 case JVM_CONSTANT_NameAndType: {
626 if (_need_verify) {
627 const int sig_index = cp->signature_ref_index_at(index);
628 const int name_index = cp->name_ref_index_at(index);
629 const Symbol* const name = cp->symbol_at(name_index);
630 const Symbol* const sig = cp->symbol_at(sig_index);
631 guarantee_property(sig->utf8_length() != 0,
632 "Illegal zero length constant pool entry at %d in class %s",
633 sig_index, CHECK);
634 guarantee_property(name->utf8_length() != 0,
635 "Illegal zero length constant pool entry at %d in class %s",
636 name_index, CHECK);
637
638 if (Signature::is_method(sig)) {
639 // Format check method name and signature
640 verify_legal_method_name(name, CHECK);
641 verify_legal_method_signature(name, sig, CHECK);
642 } else {
643 // Format check field name and signature
644 verify_legal_field_name(name, CHECK);
645 verify_legal_field_signature(name, sig, CHECK);
646 }
647 }
648 break;
649 }
650 case JVM_CONSTANT_Dynamic: {
651 const int name_and_type_ref_index =
652 cp->uncached_name_and_type_ref_index_at(index);
653 // already verified to be utf8
654 const int name_ref_index =
655 cp->name_ref_index_at(name_and_type_ref_index);
656 // already verified to be utf8
657 const int signature_ref_index =
658 cp->signature_ref_index_at(name_and_type_ref_index);
659 const Symbol* const name = cp->symbol_at(name_ref_index);
660 const Symbol* const signature = cp->symbol_at(signature_ref_index);
661 if (_need_verify) {
662 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
663 // Need only to be sure signature is the right type.
664 if (Signature::is_method(signature)) {
665 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
666 }
667 }
668 break;
669 }
670 case JVM_CONSTANT_InvokeDynamic:
671 case JVM_CONSTANT_Fieldref:
672 case JVM_CONSTANT_Methodref:
673 case JVM_CONSTANT_InterfaceMethodref: {
674 const int name_and_type_ref_index =
675 cp->uncached_name_and_type_ref_index_at(index);
676 // already verified to be utf8
677 const int name_ref_index =
678 cp->name_ref_index_at(name_and_type_ref_index);
679 // already verified to be utf8
680 const int signature_ref_index =
681 cp->signature_ref_index_at(name_and_type_ref_index);
682 const Symbol* const name = cp->symbol_at(name_ref_index);
683 const Symbol* const signature = cp->symbol_at(signature_ref_index);
684 if (tag == JVM_CONSTANT_Fieldref) {
685 if (_need_verify) {
686 // Field name and signature are verified above, when iterating NameAndType_info.
687 // Need only to be sure signature is non-zero length and the right type.
688 if (Signature::is_method(signature)) {
689 throwIllegalSignature("Field", name, signature, CHECK);
690 }
691 }
692 } else {
693 if (_need_verify) {
694 // Method name and signature are individually verified above, when iterating
695 // NameAndType_info. Need to check here that signature is non-zero length and
696 // the right type.
697 if (!Signature::is_method(signature)) {
698 throwIllegalSignature("Method", name, signature, CHECK);
699 }
700 }
701 // If a class method name begins with '<', it must be "<init>" and have void signature.
702 const unsigned int name_len = name->utf8_length();
703 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
704 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
705 if (name != vmSymbols::object_initializer_name()) {
706 classfile_parse_error(
707 "Bad method name at constant pool index %u in class file %s",
708 name_ref_index, THREAD);
709 return;
710 } else if (!Signature::is_void_method(signature)) { // must have void signature.
711 throwIllegalSignature("Method", name, signature, CHECK);
712 }
713 }
714 }
715 break;
716 }
717 case JVM_CONSTANT_MethodHandle: {
718 const int ref_index = cp->method_handle_index_at(index);
719 const int ref_kind = cp->method_handle_ref_kind_at(index);
720 switch (ref_kind) {
721 case JVM_REF_invokeVirtual:
722 case JVM_REF_invokeStatic:
723 case JVM_REF_invokeSpecial:
724 case JVM_REF_newInvokeSpecial: {
725 const int name_and_type_ref_index =
726 cp->uncached_name_and_type_ref_index_at(ref_index);
727 const int name_ref_index =
728 cp->name_ref_index_at(name_and_type_ref_index);
729 const Symbol* const name = cp->symbol_at(name_ref_index);
730 if (ref_kind == JVM_REF_newInvokeSpecial) {
731 if (name != vmSymbols::object_initializer_name()) {
732 classfile_parse_error(
733 "Bad constructor name at constant pool index %u in class file %s",
734 name_ref_index, THREAD);
735 return;
736 }
737 } else {
738 if (name == vmSymbols::object_initializer_name()) {
739 classfile_parse_error(
740 "Bad method name at constant pool index %u in class file %s",
741 name_ref_index, THREAD);
742 return;
743 }
744 }
745 break;
746 }
747 // Other ref_kinds are already fully checked in previous pass.
748 } // switch(ref_kind)
749 break;
750 }
751 case JVM_CONSTANT_MethodType: {
752 const Symbol* const no_name = vmSymbols::type_name(); // place holder
753 const Symbol* const signature = cp->method_type_signature_at(index);
754 verify_legal_method_signature(no_name, signature, CHECK);
755 break;
756 }
757 case JVM_CONSTANT_Utf8: {
758 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
759 }
760 } // switch(tag)
761 } // end of for
762 }
763
764 class NameSigHash: public ResourceObj {
765 public:
766 const Symbol* _name; // name
767 const Symbol* _sig; // signature
768
769 static const int HASH_ROW_SIZE = 256;
770
771 NameSigHash(Symbol* name, Symbol* sig) :
772 _name(name),
773 _sig(sig) {}
774
775 static unsigned int hash(NameSigHash const& namesig) {
776 return namesig._name->identity_hash() ^ namesig._sig->identity_hash();
777 }
778
779 static bool equals(NameSigHash const& e0, NameSigHash const& e1) {
780 return (e0._name == e1._name) &&
781 (e0._sig == e1._sig);
782 }
783 };
784
785 using NameSigHashtable = ResourceHashtable<NameSigHash, int,
786 NameSigHash::HASH_ROW_SIZE,
787 AnyObj::RESOURCE_AREA, mtInternal,
788 &NameSigHash::hash, &NameSigHash::equals>;
789
790 // Side-effects: populates the _local_interfaces field
791 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
792 const int itfs_len,
793 ConstantPool* const cp,
794 bool* const has_nonstatic_concrete_methods,
795 TRAPS) {
796 assert(stream != nullptr, "invariant");
797 assert(cp != nullptr, "invariant");
798 assert(has_nonstatic_concrete_methods != nullptr, "invariant");
799
800 if (itfs_len == 0) {
801 _local_interfaces = Universe::the_empty_instance_klass_array();
802 } else {
803 assert(itfs_len > 0, "only called for len>0");
804 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, nullptr, CHECK);
805
806 int index;
807 for (index = 0; index < itfs_len; index++) {
808 const u2 interface_index = stream->get_u2(CHECK);
809 Klass* interf;
810 guarantee_property(
811 valid_klass_reference_at(interface_index),
812 "Interface name has bad constant pool index %u in class file %s",
813 interface_index, CHECK);
814 if (cp->tag_at(interface_index).is_klass()) {
815 interf = cp->resolved_klass_at(interface_index);
816 } else {
817 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
818
819 // Don't need to check legal name because it's checked when parsing constant pool.
820 // But need to make sure it's not an array type.
821 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
822 "Bad interface name in class file %s", CHECK);
823
824 // Call resolve on the interface class name with class circularity checking
825 interf = SystemDictionary::resolve_super_or_fail(_class_name,
826 unresolved_klass,
827 Handle(THREAD, _loader_data->class_loader()),
828 false, CHECK);
829 }
830
831 if (!interf->is_interface()) {
832 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
833 err_msg("class %s can not implement %s, because it is not an interface (%s)",
834 _class_name->as_klass_external_name(),
835 interf->external_name(),
836 interf->class_in_module_of_loader()));
837 }
838
839 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
840 *has_nonstatic_concrete_methods = true;
841 }
842 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
843 }
844
845 if (!_need_verify || itfs_len <= 1) {
846 return;
847 }
848
849 // Check if there's any duplicates in interfaces
850 ResourceMark rm(THREAD);
851 // Set containing interface names
852 ResourceHashtable<Symbol*, int>* interface_names = new ResourceHashtable<Symbol*, int>();
853 for (index = 0; index < itfs_len; index++) {
854 const InstanceKlass* const k = _local_interfaces->at(index);
855 Symbol* interface_name = k->name();
856 // If no duplicates, add (name, nullptr) in hashtable interface_names.
857 if (!interface_names->put(interface_name, 0)) {
858 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
859 interface_name->as_C_string(), THREAD);
860 return;
861 }
862 }
863 }
864 }
865
866 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
867 int constantvalue_index,
868 int signature_index,
869 TRAPS) const {
870 // Make sure the constant pool entry is of a type appropriate to this field
871 guarantee_property(
872 (constantvalue_index > 0 &&
873 constantvalue_index < cp->length()),
874 "Bad initial value index %u in ConstantValue attribute in class file %s",
875 constantvalue_index, CHECK);
876
877 const constantTag value_type = cp->tag_at(constantvalue_index);
878 switch(cp->basic_type_for_signature_at(signature_index)) {
879 case T_LONG: {
880 guarantee_property(value_type.is_long(),
881 "Inconsistent constant value type in class file %s",
882 CHECK);
883 break;
884 }
885 case T_FLOAT: {
886 guarantee_property(value_type.is_float(),
887 "Inconsistent constant value type in class file %s",
888 CHECK);
889 break;
890 }
891 case T_DOUBLE: {
892 guarantee_property(value_type.is_double(),
893 "Inconsistent constant value type in class file %s",
894 CHECK);
895 break;
896 }
897 case T_BYTE:
898 case T_CHAR:
899 case T_SHORT:
900 case T_BOOLEAN:
901 case T_INT: {
902 guarantee_property(value_type.is_int(),
903 "Inconsistent constant value type in class file %s",
904 CHECK);
905 break;
906 }
907 case T_OBJECT: {
908 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
909 && value_type.is_string()),
910 "Bad string initial value in class file %s",
911 CHECK);
912 break;
913 }
914 default: {
915 classfile_parse_error("Unable to set initial value %u in class file %s",
916 constantvalue_index,
917 THREAD);
918 }
919 }
920 }
921
922 class AnnotationCollector : public ResourceObj{
923 public:
924 enum Location { _in_field, _in_method, _in_class };
925 enum ID {
926 _unknown = 0,
927 _method_CallerSensitive,
928 _method_ForceInline,
929 _method_DontInline,
930 _method_ChangesCurrentThread,
931 _method_JvmtiHideEvents,
932 _method_JvmtiMountTransition,
933 _method_InjectedProfile,
934 _method_LambdaForm_Compiled,
935 _method_Hidden,
936 _method_Scoped,
937 _method_IntrinsicCandidate,
938 _jdk_internal_vm_annotation_Contended,
939 _field_Stable,
940 _jdk_internal_vm_annotation_ReservedStackAccess,
941 _jdk_internal_ValueBased,
942 _java_lang_Deprecated,
943 _java_lang_Deprecated_for_removal,
944 _annotation_LIMIT
945 };
946 const Location _location;
947 int _annotations_present;
948 u2 _contended_group;
949
950 AnnotationCollector(Location location)
951 : _location(location), _annotations_present(0), _contended_group(0)
952 {
953 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
954 }
955 // If this annotation name has an ID, report it (or _none).
956 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
957 // Set the annotation name:
958 void set_annotation(ID id) {
959 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
960 _annotations_present |= (int)nth_bit((int)id);
961 }
962
963 void remove_annotation(ID id) {
964 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
965 _annotations_present &= (int)~nth_bit((int)id);
966 }
967
968 // Report if the annotation is present.
969 bool has_any_annotations() const { return _annotations_present != 0; }
970 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
971
972 void set_contended_group(u2 group) { _contended_group = group; }
973 u2 contended_group() const { return _contended_group; }
974
975 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
976
977 void set_stable(bool stable) { set_annotation(_field_Stable); }
978 bool is_stable() const { return has_annotation(_field_Stable); }
979 };
980
981 // This class also doubles as a holder for metadata cleanup.
982 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
983 private:
984 ClassLoaderData* _loader_data;
985 AnnotationArray* _field_annotations;
986 AnnotationArray* _field_type_annotations;
987 public:
988 FieldAnnotationCollector(ClassLoaderData* loader_data) :
989 AnnotationCollector(_in_field),
990 _loader_data(loader_data),
991 _field_annotations(nullptr),
992 _field_type_annotations(nullptr) {}
993 ~FieldAnnotationCollector();
994 void apply_to(FieldInfo* f);
995 AnnotationArray* field_annotations() { return _field_annotations; }
996 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
997
998 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
999 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1000 };
1001
1002 class MethodAnnotationCollector : public AnnotationCollector{
1003 public:
1004 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1005 void apply_to(const methodHandle& m);
1006 };
1007
1008 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1009 public:
1010 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1011 void apply_to(InstanceKlass* ik);
1012 };
1013
1014
1015 static int skip_annotation_value(const u1*, int, int); // fwd decl
1016
1017 // Safely increment index by val if does not pass limit
1018 #define SAFE_ADD(index, limit, val) \
1019 if (index >= limit - val) return limit; \
1020 index += val;
1021
1022 // Skip an annotation. Return >=limit if there is any problem.
1023 static int skip_annotation(const u1* buffer, int limit, int index) {
1024 assert(buffer != nullptr, "invariant");
1025 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1026 // value := switch (tag:u1) { ... }
1027 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1028 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1029 while (--nmem >= 0 && index < limit) {
1030 SAFE_ADD(index, limit, 2); // skip member
1031 index = skip_annotation_value(buffer, limit, index);
1032 }
1033 return index;
1034 }
1035
1036 // Skip an annotation value. Return >=limit if there is any problem.
1037 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1038 assert(buffer != nullptr, "invariant");
1039
1040 // value := switch (tag:u1) {
1041 // case B, C, I, S, Z, D, F, J, c: con:u2;
1042 // case e: e_class:u2 e_name:u2;
1043 // case s: s_con:u2;
1044 // case [: do(nval:u2) {value};
1045 // case @: annotation;
1046 // case s: s_con:u2;
1047 // }
1048 SAFE_ADD(index, limit, 1); // read tag
1049 const u1 tag = buffer[index - 1];
1050 switch (tag) {
1051 case 'B':
1052 case 'C':
1053 case 'I':
1054 case 'S':
1055 case 'Z':
1056 case 'D':
1057 case 'F':
1058 case 'J':
1059 case 'c':
1060 case 's':
1061 SAFE_ADD(index, limit, 2); // skip con or s_con
1062 break;
1063 case 'e':
1064 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1065 break;
1066 case '[':
1067 {
1068 SAFE_ADD(index, limit, 2); // read nval
1069 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1070 while (--nval >= 0 && index < limit) {
1071 index = skip_annotation_value(buffer, limit, index);
1072 }
1073 }
1074 break;
1075 case '@':
1076 index = skip_annotation(buffer, limit, index);
1077 break;
1078 default:
1079 return limit; // bad tag byte
1080 }
1081 return index;
1082 }
1083
1084 // Sift through annotations, looking for those significant to the VM:
1085 static void parse_annotations(const ConstantPool* const cp,
1086 const u1* buffer, int limit,
1087 AnnotationCollector* coll,
1088 ClassLoaderData* loader_data,
1089 const bool can_access_vm_annotations) {
1090
1091 assert(cp != nullptr, "invariant");
1092 assert(buffer != nullptr, "invariant");
1093 assert(coll != nullptr, "invariant");
1094 assert(loader_data != nullptr, "invariant");
1095
1096 // annotations := do(nann:u2) {annotation}
1097 int index = 2; // read nann
1098 if (index >= limit) return;
1099 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1100 enum { // initial annotation layout
1101 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1102 count_off = 2, // u2 such as 1 (one value)
1103 member_off = 4, // utf8 such as 'value'
1104 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1105 e_tag_val = 'e',
1106 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1107 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1108 e_size = 11, // end of 'e' annotation
1109 c_tag_val = 'c', // payload is type
1110 c_con_off = 7, // utf8 payload, such as 'I'
1111 c_size = 9, // end of 'c' annotation
1112 s_tag_val = 's', // payload is String
1113 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1114 s_size = 9,
1115 b_tag_val = 'Z', // payload is boolean
1116 min_size = 6 // smallest possible size (zero members)
1117 };
1118 // Cannot add min_size to index in case of overflow MAX_INT
1119 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1120 int index0 = index;
1121 index = skip_annotation(buffer, limit, index);
1122 const u1* const abase = buffer + index0;
1123 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1124 const int count = Bytes::get_Java_u2((address)abase + count_off);
1125 const Symbol* const aname = check_symbol_at(cp, atype);
1126 if (aname == nullptr) break; // invalid annotation name
1127 const Symbol* member = nullptr;
1128 if (count >= 1) {
1129 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1130 member = check_symbol_at(cp, member_index);
1131 if (member == nullptr) break; // invalid member name
1132 }
1133
1134 // Here is where parsing particular annotations will take place.
1135 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1136 if (AnnotationCollector::_unknown == id) continue;
1137 coll->set_annotation(id);
1138 if (AnnotationCollector::_java_lang_Deprecated == id) {
1139 // @Deprecated can specify forRemoval=true, which we need
1140 // to record for JFR to use. If the annotation is not well-formed
1141 // then we may not be able to determine that.
1142 const u1* offset = abase + member_off;
1143 // There are only 2 members in @Deprecated.
1144 int n_members = MIN2(count, 2);
1145 for (int i = 0; i < n_members; ++i) {
1146 int member_index = Bytes::get_Java_u2((address)offset);
1147 offset += 2;
1148 member = check_symbol_at(cp, member_index);
1149 if (member == vmSymbols::since() &&
1150 (*((address)offset) == s_tag_val)) {
1151 // Found `since` first so skip over it
1152 offset += 3;
1153 }
1154 else if (member == vmSymbols::for_removal() &&
1155 (*((address)offset) == b_tag_val)) {
1156 const u2 boolean_value_index = Bytes::get_Java_u2((address)offset + 1);
1157 // No guarantee the entry is valid so check it refers to an int in the CP.
1158 if (cp->is_within_bounds(boolean_value_index) &&
1159 cp->tag_at(boolean_value_index).is_int() &&
1160 cp->int_at(boolean_value_index) == 1) {
1161 // forRemoval == true
1162 coll->set_annotation(AnnotationCollector::_java_lang_Deprecated_for_removal);
1163 }
1164 break; // no need to check further
1165 }
1166 else {
1167 // This @Deprecated annotation is malformed so we don't try to
1168 // determine whether forRemoval is set.
1169 break;
1170 }
1171 }
1172 continue; // proceed to next annotation
1173 }
1174
1175 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1176 // @Contended can optionally specify the contention group.
1177 //
1178 // Contended group defines the equivalence class over the fields:
1179 // the fields within the same contended group are not treated distinct.
1180 // The only exception is default group, which does not incur the
1181 // equivalence. Naturally, contention group for classes is meaningless.
1182 //
1183 // While the contention group is specified as String, annotation
1184 // values are already interned, and we might as well use the constant
1185 // pool index as the group tag.
1186 //
1187 u2 group_index = 0; // default contended group
1188 if (count == 1
1189 && s_size == (index - index0) // match size
1190 && s_tag_val == *(abase + tag_off)
1191 && member == vmSymbols::value_name()) {
1192 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1193 // No guarantee the group_index is valid so check it refers to a
1194 // symbol in the CP.
1195 if (cp->is_within_bounds(group_index) &&
1196 cp->tag_at(group_index).is_utf8()) {
1197 // Seems valid, so check for empty string and reset
1198 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1199 group_index = 0; // default contended group
1200 }
1201 } else {
1202 // Not valid so use the default
1203 group_index = 0;
1204 }
1205 }
1206 coll->set_contended_group(group_index);
1207 continue; // proceed to next annotation
1208 }
1209 }
1210 }
1211
1212
1213 // Parse attributes for a field.
1214 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1215 u2 attributes_count,
1216 bool is_static, u2 signature_index,
1217 u2* const constantvalue_index_addr,
1218 bool* const is_synthetic_addr,
1219 u2* const generic_signature_index_addr,
1220 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1221 TRAPS) {
1222 assert(cfs != nullptr, "invariant");
1223 assert(constantvalue_index_addr != nullptr, "invariant");
1224 assert(is_synthetic_addr != nullptr, "invariant");
1225 assert(generic_signature_index_addr != nullptr, "invariant");
1226 assert(parsed_annotations != nullptr, "invariant");
1227 assert(attributes_count > 0, "attributes_count should be greater than 0");
1228
1229 u2 constantvalue_index = 0;
1230 u2 generic_signature_index = 0;
1231 bool is_synthetic = false;
1232 const u1* runtime_visible_annotations = nullptr;
1233 int runtime_visible_annotations_length = 0;
1234 const u1* runtime_visible_type_annotations = nullptr;
1235 int runtime_visible_type_annotations_length = 0;
1236 bool runtime_invisible_annotations_exists = false;
1237 bool runtime_invisible_type_annotations_exists = false;
1238 const ConstantPool* const cp = _cp;
1239
1240 while (attributes_count--) {
1241 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1242 const u2 attribute_name_index = cfs->get_u2_fast();
1243 const u4 attribute_length = cfs->get_u4_fast();
1244 guarantee_property(valid_symbol_at(attribute_name_index),
1245 "Invalid field attribute index %u in class file %s",
1246 attribute_name_index,
1247 CHECK);
1248
1249 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1250 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1251 // ignore if non-static
1252 if (constantvalue_index != 0) {
1253 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1254 return;
1255 }
1256 guarantee_property(
1257 attribute_length == 2,
1258 "Invalid ConstantValue field attribute length %u in class file %s",
1259 attribute_length, CHECK);
1260
1261 constantvalue_index = cfs->get_u2(CHECK);
1262 if (_need_verify) {
1263 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1264 }
1265 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1266 if (attribute_length != 0) {
1267 classfile_parse_error(
1268 "Invalid Synthetic field attribute length %u in class file %s",
1269 attribute_length, THREAD);
1270 return;
1271 }
1272 is_synthetic = true;
1273 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1274 if (attribute_length != 0) {
1275 classfile_parse_error(
1276 "Invalid Deprecated field attribute length %u in class file %s",
1277 attribute_length, THREAD);
1278 return;
1279 }
1280 } else if (_major_version >= JAVA_1_5_VERSION) {
1281 if (attribute_name == vmSymbols::tag_signature()) {
1282 if (generic_signature_index != 0) {
1283 classfile_parse_error(
1284 "Multiple Signature attributes for field in class file %s", THREAD);
1285 return;
1286 }
1287 if (attribute_length != 2) {
1288 classfile_parse_error(
1289 "Wrong size %u for field's Signature attribute in class file %s",
1290 attribute_length, THREAD);
1291 return;
1292 }
1293 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1294 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1295 if (runtime_visible_annotations != nullptr) {
1296 classfile_parse_error(
1297 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1298 return;
1299 }
1300 runtime_visible_annotations_length = attribute_length;
1301 runtime_visible_annotations = cfs->current();
1302 assert(runtime_visible_annotations != nullptr, "null visible annotations");
1303 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1304 parse_annotations(cp,
1305 runtime_visible_annotations,
1306 runtime_visible_annotations_length,
1307 parsed_annotations,
1308 _loader_data,
1309 _can_access_vm_annotations);
1310 cfs->skip_u1_fast(runtime_visible_annotations_length);
1311 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1312 if (runtime_invisible_annotations_exists) {
1313 classfile_parse_error(
1314 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1315 return;
1316 }
1317 runtime_invisible_annotations_exists = true;
1318 cfs->skip_u1(attribute_length, CHECK);
1319 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1320 if (runtime_visible_type_annotations != nullptr) {
1321 classfile_parse_error(
1322 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1323 return;
1324 }
1325 runtime_visible_type_annotations_length = attribute_length;
1326 runtime_visible_type_annotations = cfs->current();
1327 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
1328 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1329 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1330 if (runtime_invisible_type_annotations_exists) {
1331 classfile_parse_error(
1332 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1333 return;
1334 } else {
1335 runtime_invisible_type_annotations_exists = true;
1336 }
1337 cfs->skip_u1(attribute_length, CHECK);
1338 } else {
1339 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1340 }
1341 } else {
1342 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1343 }
1344 }
1345
1346 *constantvalue_index_addr = constantvalue_index;
1347 *is_synthetic_addr = is_synthetic;
1348 *generic_signature_index_addr = generic_signature_index;
1349 AnnotationArray* a = allocate_annotations(runtime_visible_annotations,
1350 runtime_visible_annotations_length,
1351 CHECK);
1352 parsed_annotations->set_field_annotations(a);
1353 a = allocate_annotations(runtime_visible_type_annotations,
1354 runtime_visible_type_annotations_length,
1355 CHECK);
1356 parsed_annotations->set_field_type_annotations(a);
1357 return;
1358 }
1359
1360
1361 // Side-effects: populates the _fields, _fields_annotations,
1362 // _fields_type_annotations fields
1363 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1364 bool is_interface,
1365 ConstantPool* cp,
1366 const int cp_size,
1367 u2* const java_fields_count_ptr,
1368 TRAPS) {
1369
1370 assert(cfs != nullptr, "invariant");
1371 assert(cp != nullptr, "invariant");
1372 assert(java_fields_count_ptr != nullptr, "invariant");
1373
1374 assert(nullptr == _fields_annotations, "invariant");
1375 assert(nullptr == _fields_type_annotations, "invariant");
1376
1377 cfs->guarantee_more(2, CHECK); // length
1378 const u2 length = cfs->get_u2_fast();
1379 *java_fields_count_ptr = length;
1380
1381 int num_injected = 0;
1382 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1383 &num_injected);
1384 const int total_fields = length + num_injected;
1385
1386 // Allocate a temporary resource array to collect field data.
1387 // After parsing all fields, data are stored in a UNSIGNED5 compressed stream.
1388 _temp_field_info = new GrowableArray<FieldInfo>(total_fields);
1389
1390 ResourceMark rm(THREAD);
1391 for (int n = 0; n < length; n++) {
1392 // access_flags, name_index, descriptor_index, attributes_count
1393 cfs->guarantee_more(8, CHECK);
1394
1395 AccessFlags access_flags;
1396 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1397 verify_legal_field_modifiers(flags, is_interface, CHECK);
1398 access_flags.set_flags(flags);
1399 FieldInfo::FieldFlags fieldFlags(0);
1400
1401 const u2 name_index = cfs->get_u2_fast();
1402 guarantee_property(valid_symbol_at(name_index),
1403 "Invalid constant pool index %u for field name in class file %s",
1404 name_index, CHECK);
1405 const Symbol* const name = cp->symbol_at(name_index);
1406 verify_legal_field_name(name, CHECK);
1407
1408 const u2 signature_index = cfs->get_u2_fast();
1409 guarantee_property(valid_symbol_at(signature_index),
1410 "Invalid constant pool index %u for field signature in class file %s",
1411 signature_index, CHECK);
1412 const Symbol* const sig = cp->symbol_at(signature_index);
1413 verify_legal_field_signature(name, sig, CHECK);
1414
1415 u2 constantvalue_index = 0;
1416 bool is_synthetic = false;
1417 u2 generic_signature_index = 0;
1418 const bool is_static = access_flags.is_static();
1419 FieldAnnotationCollector parsed_annotations(_loader_data);
1420
1421 const u2 attributes_count = cfs->get_u2_fast();
1422 if (attributes_count > 0) {
1423 parse_field_attributes(cfs,
1424 attributes_count,
1425 is_static,
1426 signature_index,
1427 &constantvalue_index,
1428 &is_synthetic,
1429 &generic_signature_index,
1430 &parsed_annotations,
1431 CHECK);
1432
1433 if (parsed_annotations.field_annotations() != nullptr) {
1434 if (_fields_annotations == nullptr) {
1435 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1436 _loader_data, length, nullptr,
1437 CHECK);
1438 }
1439 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1440 parsed_annotations.set_field_annotations(nullptr);
1441 }
1442 if (parsed_annotations.field_type_annotations() != nullptr) {
1443 if (_fields_type_annotations == nullptr) {
1444 _fields_type_annotations =
1445 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1446 length,
1447 nullptr,
1448 CHECK);
1449 }
1450 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1451 parsed_annotations.set_field_type_annotations(nullptr);
1452 }
1453
1454 if (is_synthetic) {
1455 access_flags.set_is_synthetic();
1456 }
1457 if (generic_signature_index != 0) {
1458 fieldFlags.update_generic(true);
1459 }
1460 }
1461
1462 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1463
1464 // Update number of static oop fields.
1465 if (is_static && is_reference_type(type)) {
1466 _static_oop_count++;
1467 }
1468
1469 FieldInfo fi(access_flags, name_index, signature_index, constantvalue_index, fieldFlags);
1470 fi.set_index(n);
1471 if (fieldFlags.is_generic()) {
1472 fi.set_generic_signature_index(generic_signature_index);
1473 }
1474 parsed_annotations.apply_to(&fi);
1475 if (fi.field_flags().is_contended()) {
1476 _has_contended_fields = true;
1477 }
1478 _temp_field_info->append(fi);
1479 }
1480 assert(_temp_field_info->length() == length, "Must be");
1481
1482 int index = length;
1483 if (num_injected != 0) {
1484 for (int n = 0; n < num_injected; n++) {
1485 // Check for duplicates
1486 if (injected[n].may_be_java) {
1487 const Symbol* const name = injected[n].name();
1488 const Symbol* const signature = injected[n].signature();
1489 bool duplicate = false;
1490 for (int i = 0; i < length; i++) {
1491 const FieldInfo* const f = _temp_field_info->adr_at(i);
1492 if (name == cp->symbol_at(f->name_index()) &&
1493 signature == cp->symbol_at(f->signature_index())) {
1494 // Symbol is desclared in Java so skip this one
1495 duplicate = true;
1496 break;
1497 }
1498 }
1499 if (duplicate) {
1500 // These will be removed from the field array at the end
1501 continue;
1502 }
1503 }
1504
1505 // Injected field
1506 FieldInfo::FieldFlags fflags(0);
1507 fflags.update_injected(true);
1508 AccessFlags aflags;
1509 FieldInfo fi(aflags, (u2)(injected[n].name_index), (u2)(injected[n].signature_index), 0, fflags);
1510 fi.set_index(index);
1511 _temp_field_info->append(fi);
1512 index++;
1513 }
1514 }
1515
1516 assert(_temp_field_info->length() == index, "Must be");
1517
1518 if (_need_verify && length > 1) {
1519 // Check duplicated fields
1520 ResourceMark rm(THREAD);
1521 // Set containing name-signature pairs
1522 NameSigHashtable* names_and_sigs = new NameSigHashtable();
1523 for (int i = 0; i < _temp_field_info->length(); i++) {
1524 NameSigHash name_and_sig(_temp_field_info->adr_at(i)->name(_cp),
1525 _temp_field_info->adr_at(i)->signature(_cp));
1526 // If no duplicates, add name/signature in hashtable names_and_sigs.
1527 if(!names_and_sigs->put(name_and_sig, 0)) {
1528 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1529 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
1530 return;
1531 }
1532 }
1533 }
1534 }
1535
1536
1537 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1538 u4 code_length,
1539 u4 exception_table_length,
1540 TRAPS) {
1541 assert(cfs != nullptr, "invariant");
1542
1543 const unsafe_u2* const exception_table_start = cfs->current();
1544 assert(exception_table_start != nullptr, "null exception table");
1545
1546 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1547 // end_pc,
1548 // handler_pc,
1549 // catch_type_index
1550
1551 // Will check legal target after parsing code array in verifier.
1552 if (_need_verify) {
1553 for (unsigned int i = 0; i < exception_table_length; i++) {
1554 const u2 start_pc = cfs->get_u2_fast();
1555 const u2 end_pc = cfs->get_u2_fast();
1556 const u2 handler_pc = cfs->get_u2_fast();
1557 const u2 catch_type_index = cfs->get_u2_fast();
1558 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1559 "Illegal exception table range in class file %s",
1560 CHECK_NULL);
1561 guarantee_property(handler_pc < code_length,
1562 "Illegal exception table handler in class file %s",
1563 CHECK_NULL);
1564 if (catch_type_index != 0) {
1565 guarantee_property(valid_klass_reference_at(catch_type_index),
1566 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1567 }
1568 }
1569 } else {
1570 cfs->skip_u2_fast(exception_table_length * 4);
1571 }
1572 return exception_table_start;
1573 }
1574
1575 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1576 u4 code_length,
1577 CompressedLineNumberWriteStream**const write_stream,
1578 TRAPS) {
1579
1580 const ClassFileStream* const cfs = _stream;
1581 unsigned int num_entries = cfs->get_u2(CHECK);
1582
1583 // Each entry is a u2 start_pc, and a u2 line_number
1584 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1585
1586 // Verify line number attribute and table length
1587 guarantee_property(
1588 code_attribute_length == sizeof(u2) + length_in_bytes,
1589 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1590
1591 cfs->guarantee_more(length_in_bytes, CHECK);
1592
1593 if ((*write_stream) == nullptr) {
1594 if (length_in_bytes > fixed_buffer_size) {
1595 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1596 } else {
1597 (*write_stream) = new CompressedLineNumberWriteStream(
1598 _linenumbertable_buffer, fixed_buffer_size);
1599 }
1600 }
1601
1602 while (num_entries-- > 0) {
1603 const u2 bci = cfs->get_u2_fast(); // start_pc
1604 const u2 line = cfs->get_u2_fast(); // line_number
1605 guarantee_property(bci < code_length,
1606 "Invalid pc in LineNumberTable in class file %s", CHECK);
1607 (*write_stream)->write_pair(bci, line);
1608 }
1609 }
1610
1611
1612 class LVT_Hash : public AllStatic {
1613 public:
1614
1615 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1616 /*
1617 * 3-tuple start_bci/length/slot has to be unique key,
1618 * so the following comparison seems to be redundant:
1619 * && elem->name_cp_index == entry->_elem->name_cp_index
1620 */
1621 return (e0.start_bci == e1.start_bci &&
1622 e0.length == e1.length &&
1623 e0.name_cp_index == e1.name_cp_index &&
1624 e0.slot == e1.slot);
1625 }
1626
1627 static unsigned int hash(LocalVariableTableElement const& e0) {
1628 unsigned int raw_hash = e0.start_bci;
1629
1630 raw_hash = e0.length + raw_hash * 37;
1631 raw_hash = e0.name_cp_index + raw_hash * 37;
1632 raw_hash = e0.slot + raw_hash * 37;
1633
1634 return raw_hash;
1635 }
1636 };
1637
1638
1639 // Class file LocalVariableTable elements.
1640 class Classfile_LVT_Element {
1641 public:
1642 u2 start_bci;
1643 u2 length;
1644 u2 name_cp_index;
1645 u2 descriptor_cp_index;
1646 u2 slot;
1647 };
1648
1649 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1650 LocalVariableTableElement* const lvt) {
1651 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1652 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1653 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1654 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1655 lvt->signature_cp_index = 0;
1656 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1657 }
1658
1659 // Function is used to parse both attributes:
1660 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1661 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1662 u4 code_length,
1663 u2 max_locals,
1664 u4 code_attribute_length,
1665 u2* const localvariable_table_length,
1666 bool isLVTT,
1667 TRAPS) {
1668 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1669 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1670 const unsigned int size = checked_cast<unsigned>(
1671 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2));
1672
1673 const ConstantPool* const cp = _cp;
1674
1675 // Verify local variable table attribute has right length
1676 if (_need_verify) {
1677 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1678 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1679 }
1680
1681 const unsafe_u2* const localvariable_table_start = cfs->current();
1682 assert(localvariable_table_start != nullptr, "null local variable table");
1683 if (!_need_verify) {
1684 cfs->skip_u2_fast(size);
1685 } else {
1686 cfs->guarantee_more(size * 2, CHECK_NULL);
1687 for(int i = 0; i < (*localvariable_table_length); i++) {
1688 const u2 start_pc = cfs->get_u2_fast();
1689 const u2 length = cfs->get_u2_fast();
1690 const u2 name_index = cfs->get_u2_fast();
1691 const u2 descriptor_index = cfs->get_u2_fast();
1692 const u2 index = cfs->get_u2_fast();
1693 // Assign to a u4 to avoid overflow
1694 const u4 end_pc = (u4)start_pc + (u4)length;
1695
1696 if (start_pc >= code_length) {
1697 classfile_parse_error(
1698 "Invalid start_pc %u in %s in class file %s",
1699 start_pc, tbl_name, THREAD);
1700 return nullptr;
1701 }
1702 if (end_pc > code_length) {
1703 classfile_parse_error(
1704 "Invalid length %u in %s in class file %s",
1705 length, tbl_name, THREAD);
1706 return nullptr;
1707 }
1708 const int cp_size = cp->length();
1709 guarantee_property(valid_symbol_at(name_index),
1710 "Name index %u in %s has bad constant type in class file %s",
1711 name_index, tbl_name, CHECK_NULL);
1712 guarantee_property(valid_symbol_at(descriptor_index),
1713 "Signature index %u in %s has bad constant type in class file %s",
1714 descriptor_index, tbl_name, CHECK_NULL);
1715
1716 const Symbol* const name = cp->symbol_at(name_index);
1717 const Symbol* const sig = cp->symbol_at(descriptor_index);
1718 verify_legal_field_name(name, CHECK_NULL);
1719 u2 extra_slot = 0;
1720 if (!isLVTT) {
1721 verify_legal_field_signature(name, sig, CHECK_NULL);
1722
1723 // 4894874: check special cases for double and long local variables
1724 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1725 sig == vmSymbols::type_signature(T_LONG)) {
1726 extra_slot = 1;
1727 }
1728 }
1729 guarantee_property((index + extra_slot) < max_locals,
1730 "Invalid index %u in %s in class file %s",
1731 index, tbl_name, CHECK_NULL);
1732 }
1733 }
1734 return localvariable_table_start;
1735 }
1736
1737 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1738 u4 code_attribute_length,
1739 TRAPS) {
1740 assert(cfs != nullptr, "invariant");
1741
1742 if (0 == code_attribute_length) {
1743 return nullptr;
1744 }
1745
1746 const u1* const stackmap_table_start = cfs->current();
1747 assert(stackmap_table_start != nullptr, "null stackmap table");
1748
1749 // check code_attribute_length
1750 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1751
1752 return stackmap_table_start;
1753 }
1754
1755 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1756 u2* const checked_exceptions_length,
1757 u4 method_attribute_length,
1758 TRAPS) {
1759 assert(cfs != nullptr, "invariant");
1760 assert(checked_exceptions_length != nullptr, "invariant");
1761
1762 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1763 *checked_exceptions_length = cfs->get_u2_fast();
1764 const unsigned int size =
1765 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1766 const unsafe_u2* const checked_exceptions_start = cfs->current();
1767 assert(checked_exceptions_start != nullptr, "null checked exceptions");
1768 if (!_need_verify) {
1769 cfs->skip_u2_fast(size);
1770 } else {
1771 // Verify each value in the checked exception table
1772 u2 checked_exception;
1773 const u2 len = *checked_exceptions_length;
1774 cfs->guarantee_more(2 * len, CHECK_NULL);
1775 for (int i = 0; i < len; i++) {
1776 checked_exception = cfs->get_u2_fast();
1777 guarantee_property(
1778 valid_klass_reference_at(checked_exception),
1779 "Exception name has bad type at constant pool %u in class file %s",
1780 checked_exception, CHECK_NULL);
1781 }
1782 }
1783 // check exceptions attribute length
1784 if (_need_verify) {
1785 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1786 sizeof(u2) * size),
1787 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1788 }
1789 return checked_exceptions_start;
1790 }
1791
1792 void ClassFileParser::throwIllegalSignature(const char* type,
1793 const Symbol* name,
1794 const Symbol* sig,
1795 TRAPS) const {
1796 assert(name != nullptr, "invariant");
1797 assert(sig != nullptr, "invariant");
1798
1799 ResourceMark rm(THREAD);
1800 // Names are all known to be < 64k so we know this formatted message is not excessively large.
1801 Exceptions::fthrow(THREAD_AND_LOCATION,
1802 vmSymbols::java_lang_ClassFormatError(),
1803 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1804 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1805 }
1806
1807 AnnotationCollector::ID
1808 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1809 const Symbol* name,
1810 const bool can_access_vm_annotations) {
1811 const vmSymbolID sid = vmSymbols::find_sid(name);
1812 // Privileged code can use all annotations. Other code silently drops some.
1813 const bool privileged = loader_data->is_boot_class_loader_data() ||
1814 loader_data->is_platform_class_loader_data() ||
1815 can_access_vm_annotations;
1816 switch (sid) {
1817 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1818 if (_location != _in_method) break; // only allow for methods
1819 if (!privileged) break; // only allow in privileged code
1820 return _method_CallerSensitive;
1821 }
1822 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1823 if (_location != _in_method) break; // only allow for methods
1824 if (!privileged) break; // only allow in privileged code
1825 return _method_ForceInline;
1826 }
1827 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1828 if (_location != _in_method) break; // only allow for methods
1829 if (!privileged) break; // only allow in privileged code
1830 return _method_DontInline;
1831 }
1832 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ChangesCurrentThread_signature): {
1833 if (_location != _in_method) break; // only allow for methods
1834 if (!privileged) break; // only allow in privileged code
1835 return _method_ChangesCurrentThread;
1836 }
1837 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiHideEvents_signature): {
1838 if (_location != _in_method) break; // only allow for methods
1839 if (!privileged) break; // only allow in privileged code
1840 return _method_JvmtiHideEvents;
1841 }
1842 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiMountTransition_signature): {
1843 if (_location != _in_method) break; // only allow for methods
1844 if (!privileged) break; // only allow in privileged code
1845 return _method_JvmtiMountTransition;
1846 }
1847 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1848 if (_location != _in_method) break; // only allow for methods
1849 if (!privileged) break; // only allow in privileged code
1850 return _method_InjectedProfile;
1851 }
1852 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1853 if (_location != _in_method) break; // only allow for methods
1854 if (!privileged) break; // only allow in privileged code
1855 return _method_LambdaForm_Compiled;
1856 }
1857 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
1858 if (_location != _in_method) break; // only allow for methods
1859 if (!privileged) break; // only allow in privileged code
1860 return _method_Hidden;
1861 }
1862 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
1863 if (_location != _in_method) break; // only allow for methods
1864 if (!privileged) break; // only allow in privileged code
1865 return _method_Scoped;
1866 }
1867 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
1868 if (_location != _in_method) break; // only allow for methods
1869 if (!privileged) break; // only allow in privileged code
1870 return _method_IntrinsicCandidate;
1871 }
1872 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
1873 if (_location != _in_field) break; // only allow for fields
1874 if (!privileged) break; // only allow in privileged code
1875 return _field_Stable;
1876 }
1877 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
1878 if (_location != _in_field && _location != _in_class) {
1879 break; // only allow for fields and classes
1880 }
1881 if (!EnableContended || (RestrictContended && !privileged)) {
1882 break; // honor privileges
1883 }
1884 return _jdk_internal_vm_annotation_Contended;
1885 }
1886 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
1887 if (_location != _in_method) break; // only allow for methods
1888 if (RestrictReservedStack && !privileged) break; // honor privileges
1889 return _jdk_internal_vm_annotation_ReservedStackAccess;
1890 }
1891 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
1892 if (_location != _in_class) break; // only allow for classes
1893 if (!privileged) break; // only allow in privileged code
1894 return _jdk_internal_ValueBased;
1895 }
1896 case VM_SYMBOL_ENUM_NAME(java_lang_Deprecated): {
1897 return _java_lang_Deprecated;
1898 }
1899 default: {
1900 break;
1901 }
1902 }
1903 return AnnotationCollector::_unknown;
1904 }
1905
1906 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1907 if (is_contended())
1908 // Setting the contended group also sets the contended bit in field flags
1909 f->set_contended_group(contended_group());
1910 if (is_stable())
1911 (f->field_flags_addr())->update_stable(true);
1912 }
1913
1914 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
1915 // If there's an error deallocate metadata for field annotations
1916 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
1917 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
1918 }
1919
1920 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
1921 if (has_annotation(_method_CallerSensitive))
1922 m->set_caller_sensitive();
1923 if (has_annotation(_method_ForceInline))
1924 m->set_force_inline();
1925 if (has_annotation(_method_DontInline))
1926 m->set_dont_inline();
1927 if (has_annotation(_method_ChangesCurrentThread))
1928 m->set_changes_current_thread();
1929 if (has_annotation(_method_JvmtiHideEvents))
1930 m->set_jvmti_hide_events();
1931 if (has_annotation(_method_JvmtiMountTransition))
1932 m->set_jvmti_mount_transition();
1933 if (has_annotation(_method_InjectedProfile))
1934 m->set_has_injected_profile();
1935 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1936 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1937 if (has_annotation(_method_Hidden))
1938 m->set_is_hidden();
1939 if (has_annotation(_method_Scoped))
1940 m->set_scoped();
1941 if (has_annotation(_method_IntrinsicCandidate) && !m->is_synthetic())
1942 m->set_intrinsic_candidate();
1943 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
1944 m->set_has_reserved_stack_access();
1945 if (has_annotation(_java_lang_Deprecated))
1946 m->set_deprecated();
1947 if (has_annotation(_java_lang_Deprecated_for_removal))
1948 m->set_deprecated_for_removal();
1949 }
1950
1951 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
1952 assert(ik != nullptr, "invariant");
1953 if (has_annotation(_jdk_internal_vm_annotation_Contended)) {
1954 ik->set_is_contended(is_contended());
1955 }
1956 if (has_annotation(_jdk_internal_ValueBased)) {
1957 ik->set_has_value_based_class_annotation();
1958 if (DiagnoseSyncOnValueBasedClasses) {
1959 ik->set_is_value_based();
1960 }
1961 }
1962 if (has_annotation(_java_lang_Deprecated)) {
1963 Array<Method*>* methods = ik->methods();
1964 int length = ik->methods()->length();
1965 for (int i = 0; i < length; i++) {
1966 Method* m = methods->at(i);
1967 m->set_deprecated();
1968 }
1969 }
1970 if (has_annotation(_java_lang_Deprecated_for_removal)) {
1971 Array<Method*>* methods = ik->methods();
1972 int length = ik->methods()->length();
1973 for (int i = 0; i < length; i++) {
1974 Method* m = methods->at(i);
1975 m->set_deprecated_for_removal();
1976 }
1977 }
1978 }
1979
1980 #define MAX_ARGS_SIZE 255
1981 #define MAX_CODE_SIZE 65535
1982 #define INITIAL_MAX_LVT_NUMBER 256
1983
1984 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1985 *
1986 * Rules for LVT's and LVTT's are:
1987 * - There can be any number of LVT's and LVTT's.
1988 * - If there are n LVT's, it is the same as if there was just
1989 * one LVT containing all the entries from the n LVT's.
1990 * - There may be no more than one LVT entry per local variable.
1991 * Two LVT entries are 'equal' if these fields are the same:
1992 * start_pc, length, name, slot
1993 * - There may be no more than one LVTT entry per each LVT entry.
1994 * Each LVTT entry has to match some LVT entry.
1995 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
1996 */
1997 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
1998 int lvt_cnt,
1999 u2* const localvariable_table_length,
2000 const unsafe_u2** const localvariable_table_start,
2001 int lvtt_cnt,
2002 u2* const localvariable_type_table_length,
2003 const unsafe_u2** const localvariable_type_table_start,
2004 TRAPS) {
2005
2006 ResourceMark rm(THREAD);
2007
2008 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2009 256, AnyObj::RESOURCE_AREA, mtInternal,
2010 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2011
2012 LVT_HashTable* const table = new LVT_HashTable();
2013
2014 // To fill LocalVariableTable in
2015 const Classfile_LVT_Element* cf_lvt;
2016 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2017
2018 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2019 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2020 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2021 copy_lvt_element(&cf_lvt[idx], lvt);
2022 // If no duplicates, add LVT elem in hashtable.
2023 if (table->put(*lvt, lvt) == false
2024 && _need_verify
2025 && _major_version >= JAVA_1_5_VERSION) {
2026 classfile_parse_error("Duplicated LocalVariableTable attribute "
2027 "entry for '%s' in class file %s",
2028 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2029 THREAD);
2030 return;
2031 }
2032 }
2033 }
2034
2035 // To merge LocalVariableTable and LocalVariableTypeTable
2036 const Classfile_LVT_Element* cf_lvtt;
2037 LocalVariableTableElement lvtt_elem;
2038
2039 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2040 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2041 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2042 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2043 LocalVariableTableElement** entry = table->get(lvtt_elem);
2044 if (entry == nullptr) {
2045 if (_need_verify) {
2046 classfile_parse_error("LVTT entry for '%s' in class file %s "
2047 "does not match any LVT entry",
2048 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2049 THREAD);
2050 return;
2051 }
2052 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2053 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2054 "entry for '%s' in class file %s",
2055 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2056 THREAD);
2057 return;
2058 } else {
2059 // to add generic signatures into LocalVariableTable
2060 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2061 }
2062 }
2063 }
2064 }
2065
2066
2067 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2068 const u1* runtime_visible_annotations,
2069 int runtime_visible_annotations_length,
2070 const u1* runtime_visible_parameter_annotations,
2071 int runtime_visible_parameter_annotations_length,
2072 const u1* runtime_visible_type_annotations,
2073 int runtime_visible_type_annotations_length,
2074 const u1* annotation_default,
2075 int annotation_default_length,
2076 TRAPS) {
2077
2078 AnnotationArray* a;
2079
2080 if (runtime_visible_annotations_length > 0) {
2081 a = allocate_annotations(runtime_visible_annotations,
2082 runtime_visible_annotations_length,
2083 CHECK);
2084 cm->set_method_annotations(a);
2085 }
2086
2087 if (runtime_visible_parameter_annotations_length > 0) {
2088 a = allocate_annotations(runtime_visible_parameter_annotations,
2089 runtime_visible_parameter_annotations_length,
2090 CHECK);
2091 cm->set_parameter_annotations(a);
2092 }
2093
2094 if (annotation_default_length > 0) {
2095 a = allocate_annotations(annotation_default,
2096 annotation_default_length,
2097 CHECK);
2098 cm->set_default_annotations(a);
2099 }
2100
2101 if (runtime_visible_type_annotations_length > 0) {
2102 a = allocate_annotations(runtime_visible_type_annotations,
2103 runtime_visible_type_annotations_length,
2104 CHECK);
2105 cm->set_type_annotations(a);
2106 }
2107 }
2108
2109
2110 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2111 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2112 // Method* to save footprint, so we only know the size of the resulting Method* when the
2113 // entire method attribute is parsed.
2114 //
2115 // The has_localvariable_table parameter is used to pass up the value to InstanceKlass.
2116
2117 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2118 bool is_interface,
2119 const ConstantPool* cp,
2120 bool* const has_localvariable_table,
2121 TRAPS) {
2122 assert(cfs != nullptr, "invariant");
2123 assert(cp != nullptr, "invariant");
2124 assert(has_localvariable_table != nullptr, "invariant");
2125
2126 ResourceMark rm(THREAD);
2127 // Parse fixed parts:
2128 // access_flags, name_index, descriptor_index, attributes_count
2129 cfs->guarantee_more(8, CHECK_NULL);
2130
2131 u2 flags = cfs->get_u2_fast();
2132 const u2 name_index = cfs->get_u2_fast();
2133 const int cp_size = cp->length();
2134 guarantee_property(
2135 valid_symbol_at(name_index),
2136 "Illegal constant pool index %u for method name in class file %s",
2137 name_index, CHECK_NULL);
2138 const Symbol* const name = cp->symbol_at(name_index);
2139 verify_legal_method_name(name, CHECK_NULL);
2140
2141 const u2 signature_index = cfs->get_u2_fast();
2142 guarantee_property(
2143 valid_symbol_at(signature_index),
2144 "Illegal constant pool index %u for method signature in class file %s",
2145 signature_index, CHECK_NULL);
2146 const Symbol* const signature = cp->symbol_at(signature_index);
2147
2148 if (name == vmSymbols::class_initializer_name()) {
2149 // We ignore the other access flags for a valid class initializer.
2150 // (JVM Spec 2nd ed., chapter 4.6)
2151 if (_major_version < 51) { // backward compatibility
2152 flags = JVM_ACC_STATIC;
2153 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2154 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2155 } else {
2156 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2157 return nullptr;
2158 }
2159 } else {
2160 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2161 }
2162
2163 if (name == vmSymbols::object_initializer_name() && is_interface) {
2164 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2165 return nullptr;
2166 }
2167
2168 int args_size = -1; // only used when _need_verify is true
2169 if (_need_verify) {
2170 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2171 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2172 verify_legal_method_signature(name, signature, CHECK_NULL);
2173 if (args_size > MAX_ARGS_SIZE) {
2174 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2175 return nullptr;
2176 }
2177 }
2178
2179 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2180
2181 // Default values for code and exceptions attribute elements
2182 u2 max_stack = 0;
2183 u2 max_locals = 0;
2184 u4 code_length = 0;
2185 const u1* code_start = nullptr;
2186 u2 exception_table_length = 0;
2187 const unsafe_u2* exception_table_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2188 Array<int>* exception_handlers = Universe::the_empty_int_array();
2189 u2 checked_exceptions_length = 0;
2190 const unsafe_u2* checked_exceptions_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2191 CompressedLineNumberWriteStream* linenumber_table = nullptr;
2192 int linenumber_table_length = 0;
2193 int total_lvt_length = 0;
2194 u2 lvt_cnt = 0;
2195 u2 lvtt_cnt = 0;
2196 bool lvt_allocated = false;
2197 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2198 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2199 u2* localvariable_table_length = nullptr;
2200 const unsafe_u2** localvariable_table_start = nullptr; // (potentially unaligned) pointer to array of LVT attributes
2201 u2* localvariable_type_table_length = nullptr;
2202 const unsafe_u2** localvariable_type_table_start = nullptr; // (potentially unaligned) pointer to LVTT attributes
2203 int method_parameters_length = -1;
2204 const u1* method_parameters_data = nullptr;
2205 bool method_parameters_seen = false;
2206 bool parsed_code_attribute = false;
2207 bool parsed_checked_exceptions_attribute = false;
2208 bool parsed_stackmap_attribute = false;
2209 // stackmap attribute - JDK1.5
2210 const u1* stackmap_data = nullptr;
2211 int stackmap_data_length = 0;
2212 u2 generic_signature_index = 0;
2213 MethodAnnotationCollector parsed_annotations;
2214 const u1* runtime_visible_annotations = nullptr;
2215 int runtime_visible_annotations_length = 0;
2216 const u1* runtime_visible_parameter_annotations = nullptr;
2217 int runtime_visible_parameter_annotations_length = 0;
2218 const u1* runtime_visible_type_annotations = nullptr;
2219 int runtime_visible_type_annotations_length = 0;
2220 bool runtime_invisible_annotations_exists = false;
2221 bool runtime_invisible_type_annotations_exists = false;
2222 bool runtime_invisible_parameter_annotations_exists = false;
2223 const u1* annotation_default = nullptr;
2224 int annotation_default_length = 0;
2225
2226 // Parse code and exceptions attribute
2227 u2 method_attributes_count = cfs->get_u2_fast();
2228 while (method_attributes_count--) {
2229 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2230 const u2 method_attribute_name_index = cfs->get_u2_fast();
2231 const u4 method_attribute_length = cfs->get_u4_fast();
2232 guarantee_property(
2233 valid_symbol_at(method_attribute_name_index),
2234 "Invalid method attribute name index %u in class file %s",
2235 method_attribute_name_index, CHECK_NULL);
2236
2237 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2238 if (method_attribute_name == vmSymbols::tag_code()) {
2239 // Parse Code attribute
2240 if (_need_verify) {
2241 guarantee_property(
2242 !access_flags.is_native() && !access_flags.is_abstract(),
2243 "Code attribute in native or abstract methods in class file %s",
2244 CHECK_NULL);
2245 }
2246 if (parsed_code_attribute) {
2247 classfile_parse_error("Multiple Code attributes in class file %s",
2248 THREAD);
2249 return nullptr;
2250 }
2251 parsed_code_attribute = true;
2252
2253 // Stack size, locals size, and code size
2254 cfs->guarantee_more(8, CHECK_NULL);
2255 max_stack = cfs->get_u2_fast();
2256 max_locals = cfs->get_u2_fast();
2257 code_length = cfs->get_u4_fast();
2258 if (_need_verify) {
2259 guarantee_property(args_size <= max_locals,
2260 "Arguments can't fit into locals in class file %s",
2261 CHECK_NULL);
2262 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2263 "Invalid method Code length %u in class file %s",
2264 code_length, CHECK_NULL);
2265 }
2266 // Code pointer
2267 code_start = cfs->current();
2268 assert(code_start != nullptr, "null code start");
2269 cfs->guarantee_more(code_length, CHECK_NULL);
2270 cfs->skip_u1_fast(code_length);
2271
2272 // Exception handler table
2273 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2274 exception_table_length = cfs->get_u2_fast();
2275 if (exception_table_length > 0) {
2276 exception_table_start = parse_exception_table(cfs,
2277 code_length,
2278 exception_table_length,
2279 CHECK_NULL);
2280 }
2281
2282 // Parse additional attributes in code attribute
2283 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2284 u2 code_attributes_count = cfs->get_u2_fast();
2285
2286 unsigned int calculated_attribute_length = 0;
2287
2288 calculated_attribute_length =
2289 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2290 calculated_attribute_length += checked_cast<unsigned int>(
2291 code_length +
2292 sizeof(exception_table_length) +
2293 sizeof(code_attributes_count) +
2294 exception_table_length *
2295 ( sizeof(u2) + // start_pc
2296 sizeof(u2) + // end_pc
2297 sizeof(u2) + // handler_pc
2298 sizeof(u2) )); // catch_type_index
2299
2300 while (code_attributes_count--) {
2301 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2302 const u2 code_attribute_name_index = cfs->get_u2_fast();
2303 const u4 code_attribute_length = cfs->get_u4_fast();
2304 calculated_attribute_length += code_attribute_length +
2305 (unsigned)sizeof(code_attribute_name_index) +
2306 (unsigned)sizeof(code_attribute_length);
2307 guarantee_property(valid_symbol_at(code_attribute_name_index),
2308 "Invalid code attribute name index %u in class file %s",
2309 code_attribute_name_index,
2310 CHECK_NULL);
2311 if (LoadLineNumberTables &&
2312 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2313 // Parse and compress line number table
2314 parse_linenumber_table(code_attribute_length,
2315 code_length,
2316 &linenumber_table,
2317 CHECK_NULL);
2318
2319 } else if (LoadLocalVariableTables &&
2320 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2321 // Parse local variable table
2322 if (!lvt_allocated) {
2323 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2324 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2325 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2326 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2327 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2328 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2329 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2330 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2331 lvt_allocated = true;
2332 }
2333 if (lvt_cnt == max_lvt_cnt) {
2334 max_lvt_cnt <<= 1;
2335 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2336 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2337 }
2338 localvariable_table_start[lvt_cnt] =
2339 parse_localvariable_table(cfs,
2340 code_length,
2341 max_locals,
2342 code_attribute_length,
2343 &localvariable_table_length[lvt_cnt],
2344 false, // is not LVTT
2345 CHECK_NULL);
2346 total_lvt_length += localvariable_table_length[lvt_cnt];
2347 lvt_cnt++;
2348 } else if (LoadLocalVariableTypeTables &&
2349 _major_version >= JAVA_1_5_VERSION &&
2350 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2351 if (!lvt_allocated) {
2352 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2353 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2354 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2355 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2356 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2357 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2358 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2359 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2360 lvt_allocated = true;
2361 }
2362 // Parse local variable type table
2363 if (lvtt_cnt == max_lvtt_cnt) {
2364 max_lvtt_cnt <<= 1;
2365 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2366 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2367 }
2368 localvariable_type_table_start[lvtt_cnt] =
2369 parse_localvariable_table(cfs,
2370 code_length,
2371 max_locals,
2372 code_attribute_length,
2373 &localvariable_type_table_length[lvtt_cnt],
2374 true, // is LVTT
2375 CHECK_NULL);
2376 lvtt_cnt++;
2377 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2378 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2379 // Stack map is only needed by the new verifier in JDK1.5.
2380 if (parsed_stackmap_attribute) {
2381 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2382 return nullptr;
2383 }
2384 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, CHECK_NULL);
2385 stackmap_data_length = code_attribute_length;
2386 parsed_stackmap_attribute = true;
2387 } else {
2388 // Skip unknown attributes
2389 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2390 }
2391 }
2392 // check method attribute length
2393 if (_need_verify) {
2394 guarantee_property(method_attribute_length == calculated_attribute_length,
2395 "Code segment has wrong length in class file %s",
2396 CHECK_NULL);
2397 }
2398 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2399 // Parse Exceptions attribute
2400 if (parsed_checked_exceptions_attribute) {
2401 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2402 THREAD);
2403 return nullptr;
2404 }
2405 parsed_checked_exceptions_attribute = true;
2406 checked_exceptions_start =
2407 parse_checked_exceptions(cfs,
2408 &checked_exceptions_length,
2409 method_attribute_length,
2410 CHECK_NULL);
2411 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2412 // reject multiple method parameters
2413 if (method_parameters_seen) {
2414 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2415 THREAD);
2416 return nullptr;
2417 }
2418 method_parameters_seen = true;
2419 method_parameters_length = cfs->get_u1_fast();
2420 const u4 real_length = (method_parameters_length * 4u) + 1u;
2421 if (method_attribute_length != real_length) {
2422 classfile_parse_error(
2423 "Invalid MethodParameters method attribute length %u in class file",
2424 method_attribute_length, THREAD);
2425 return nullptr;
2426 }
2427 method_parameters_data = cfs->current();
2428 cfs->skip_u2_fast(method_parameters_length);
2429 cfs->skip_u2_fast(method_parameters_length);
2430 // ignore this attribute if it cannot be reflected
2431 if (!vmClasses::Parameter_klass_loaded())
2432 method_parameters_length = -1;
2433 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2434 if (method_attribute_length != 0) {
2435 classfile_parse_error(
2436 "Invalid Synthetic method attribute length %u in class file %s",
2437 method_attribute_length, THREAD);
2438 return nullptr;
2439 }
2440 // Should we check that there hasn't already been a synthetic attribute?
2441 access_flags.set_is_synthetic();
2442 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2443 if (method_attribute_length != 0) {
2444 classfile_parse_error(
2445 "Invalid Deprecated method attribute length %u in class file %s",
2446 method_attribute_length, THREAD);
2447 return nullptr;
2448 }
2449 } else if (_major_version >= JAVA_1_5_VERSION) {
2450 if (method_attribute_name == vmSymbols::tag_signature()) {
2451 if (generic_signature_index != 0) {
2452 classfile_parse_error(
2453 "Multiple Signature attributes for method in class file %s",
2454 THREAD);
2455 return nullptr;
2456 }
2457 if (method_attribute_length != 2) {
2458 classfile_parse_error(
2459 "Invalid Signature attribute length %u in class file %s",
2460 method_attribute_length, THREAD);
2461 return nullptr;
2462 }
2463 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2464 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2465 if (runtime_visible_annotations != nullptr) {
2466 classfile_parse_error(
2467 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2468 THREAD);
2469 return nullptr;
2470 }
2471 runtime_visible_annotations_length = method_attribute_length;
2472 runtime_visible_annotations = cfs->current();
2473 assert(runtime_visible_annotations != nullptr, "null visible annotations");
2474 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2475 parse_annotations(cp,
2476 runtime_visible_annotations,
2477 runtime_visible_annotations_length,
2478 &parsed_annotations,
2479 _loader_data,
2480 _can_access_vm_annotations);
2481 cfs->skip_u1_fast(runtime_visible_annotations_length);
2482 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2483 if (runtime_invisible_annotations_exists) {
2484 classfile_parse_error(
2485 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2486 THREAD);
2487 return nullptr;
2488 }
2489 runtime_invisible_annotations_exists = true;
2490 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2491 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2492 if (runtime_visible_parameter_annotations != nullptr) {
2493 classfile_parse_error(
2494 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2495 THREAD);
2496 return nullptr;
2497 }
2498 runtime_visible_parameter_annotations_length = method_attribute_length;
2499 runtime_visible_parameter_annotations = cfs->current();
2500 assert(runtime_visible_parameter_annotations != nullptr, "null visible parameter annotations");
2501 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2502 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2503 if (runtime_invisible_parameter_annotations_exists) {
2504 classfile_parse_error(
2505 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2506 THREAD);
2507 return nullptr;
2508 }
2509 runtime_invisible_parameter_annotations_exists = true;
2510 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2511 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2512 if (annotation_default != nullptr) {
2513 classfile_parse_error(
2514 "Multiple AnnotationDefault attributes for method in class file %s",
2515 THREAD);
2516 return nullptr;
2517 }
2518 annotation_default_length = method_attribute_length;
2519 annotation_default = cfs->current();
2520 assert(annotation_default != nullptr, "null annotation default");
2521 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2522 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2523 if (runtime_visible_type_annotations != nullptr) {
2524 classfile_parse_error(
2525 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2526 THREAD);
2527 return nullptr;
2528 }
2529 runtime_visible_type_annotations_length = method_attribute_length;
2530 runtime_visible_type_annotations = cfs->current();
2531 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
2532 // No need for the VM to parse Type annotations
2533 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2534 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2535 if (runtime_invisible_type_annotations_exists) {
2536 classfile_parse_error(
2537 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2538 THREAD);
2539 return nullptr;
2540 }
2541 runtime_invisible_type_annotations_exists = true;
2542 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2543 } else {
2544 // Skip unknown attributes
2545 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2546 }
2547 } else {
2548 // Skip unknown attributes
2549 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2550 }
2551 }
2552
2553 if (linenumber_table != nullptr) {
2554 linenumber_table->write_terminator();
2555 linenumber_table_length = linenumber_table->position();
2556 }
2557
2558 // Make sure there's at least one Code attribute in non-native/non-abstract method
2559 if (_need_verify) {
2560 guarantee_property(access_flags.is_native() ||
2561 access_flags.is_abstract() ||
2562 parsed_code_attribute,
2563 "Absent Code attribute in method that is not native or abstract in class file %s",
2564 CHECK_NULL);
2565 }
2566
2567 // All sizing information for a Method* is finally available, now create it
2568 InlineTableSizes sizes(
2569 total_lvt_length,
2570 linenumber_table_length,
2571 exception_table_length,
2572 checked_exceptions_length,
2573 method_parameters_length,
2574 generic_signature_index,
2575 runtime_visible_annotations_length,
2576 runtime_visible_parameter_annotations_length,
2577 runtime_visible_type_annotations_length,
2578 annotation_default_length,
2579 0);
2580
2581 Method* const m = Method::allocate(_loader_data,
2582 code_length,
2583 access_flags,
2584 &sizes,
2585 ConstMethod::NORMAL,
2586 _cp->symbol_at(name_index),
2587 CHECK_NULL);
2588
2589 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2590
2591 // Fill in information from fixed part (access_flags already set)
2592 m->set_constants(_cp);
2593 m->set_name_index(name_index);
2594 m->set_signature_index(signature_index);
2595 m->constMethod()->compute_from_signature(cp->symbol_at(signature_index), access_flags.is_static());
2596 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2597
2598 // Fill in code attribute information
2599 m->set_max_stack(max_stack);
2600 m->set_max_locals(max_locals);
2601 if (stackmap_data != nullptr) {
2602 m->constMethod()->copy_stackmap_data(_loader_data,
2603 (u1*)stackmap_data,
2604 stackmap_data_length,
2605 CHECK_NULL);
2606 }
2607
2608 // Copy byte codes
2609 m->set_code((u1*)code_start);
2610
2611 // Copy line number table
2612 if (linenumber_table != nullptr) {
2613 memcpy(m->compressed_linenumber_table(),
2614 linenumber_table->buffer(),
2615 linenumber_table_length);
2616 }
2617
2618 // Copy exception table
2619 if (exception_table_length > 0) {
2620 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2621 m->exception_table_start(),
2622 exception_table_length * sizeof(ExceptionTableElement),
2623 sizeof(u2));
2624 }
2625
2626 // Copy method parameters
2627 if (method_parameters_length > 0) {
2628 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2629 for (int i = 0; i < method_parameters_length; i++) {
2630 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2631 method_parameters_data += 2;
2632 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2633 method_parameters_data += 2;
2634 }
2635 }
2636
2637 // Copy checked exceptions
2638 if (checked_exceptions_length > 0) {
2639 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2640 m->checked_exceptions_start(),
2641 checked_exceptions_length * sizeof(CheckedExceptionElement),
2642 sizeof(u2));
2643 }
2644
2645 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2646 if (total_lvt_length > 0) {
2647 *has_localvariable_table = true;
2648 copy_localvariable_table(m->constMethod(),
2649 lvt_cnt,
2650 localvariable_table_length,
2651 localvariable_table_start,
2652 lvtt_cnt,
2653 localvariable_type_table_length,
2654 localvariable_type_table_start,
2655 CHECK_NULL);
2656 }
2657
2658 if (parsed_annotations.has_any_annotations())
2659 parsed_annotations.apply_to(methodHandle(THREAD, m));
2660
2661 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2662 m->set_is_hidden();
2663 }
2664
2665 // Copy annotations
2666 copy_method_annotations(m->constMethod(),
2667 runtime_visible_annotations,
2668 runtime_visible_annotations_length,
2669 runtime_visible_parameter_annotations,
2670 runtime_visible_parameter_annotations_length,
2671 runtime_visible_type_annotations,
2672 runtime_visible_type_annotations_length,
2673 annotation_default,
2674 annotation_default_length,
2675 CHECK_NULL);
2676
2677 if (InstanceKlass::is_finalization_enabled() &&
2678 name == vmSymbols::finalize_method_name() &&
2679 signature == vmSymbols::void_method_signature()) {
2680 if (m->is_empty_method()) {
2681 _has_empty_finalizer = true;
2682 } else {
2683 _has_finalizer = true;
2684 }
2685 }
2686
2687 NOT_PRODUCT(m->verify());
2688 return m;
2689 }
2690
2691
2692 // Side-effects: populates the _methods field in the parser
2693 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2694 bool is_interface,
2695 bool* const has_localvariable_table,
2696 bool* has_final_method,
2697 bool* declares_nonstatic_concrete_methods,
2698 TRAPS) {
2699 assert(cfs != nullptr, "invariant");
2700 assert(has_localvariable_table != nullptr, "invariant");
2701 assert(has_final_method != nullptr, "invariant");
2702 assert(declares_nonstatic_concrete_methods != nullptr, "invariant");
2703
2704 assert(nullptr == _methods, "invariant");
2705
2706 cfs->guarantee_more(2, CHECK); // length
2707 const u2 length = cfs->get_u2_fast();
2708 if (length == 0) {
2709 _methods = Universe::the_empty_method_array();
2710 } else {
2711 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2712 length,
2713 nullptr,
2714 CHECK);
2715
2716 for (int index = 0; index < length; index++) {
2717 Method* method = parse_method(cfs,
2718 is_interface,
2719 _cp,
2720 has_localvariable_table,
2721 CHECK);
2722
2723 if (method->is_final()) {
2724 *has_final_method = true;
2725 }
2726 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2727 // used for interface initialization, and default method inheritance analysis
2728 if (is_interface && !(*declares_nonstatic_concrete_methods)
2729 && !method->is_abstract() && !method->is_static()) {
2730 *declares_nonstatic_concrete_methods = true;
2731 }
2732 _methods->at_put(index, method);
2733 }
2734
2735 if (_need_verify && length > 1) {
2736 // Check duplicated methods
2737 ResourceMark rm(THREAD);
2738 // Set containing name-signature pairs
2739 NameSigHashtable* names_and_sigs = new NameSigHashtable();
2740 for (int i = 0; i < length; i++) {
2741 const Method* const m = _methods->at(i);
2742 NameSigHash name_and_sig(m->name(), m->signature());
2743 // If no duplicates, add name/signature in hashtable names_and_sigs.
2744 if(!names_and_sigs->put(name_and_sig, 0)) {
2745 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2746 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
2747 return;
2748 }
2749 }
2750 }
2751 }
2752 }
2753
2754 static const intArray* sort_methods(Array<Method*>* methods) {
2755 const int length = methods->length();
2756 // If JVMTI original method ordering or sharing is enabled we have to
2757 // remember the original class file ordering.
2758 // We temporarily use the vtable_index field in the Method* to store the
2759 // class file index, so we can read in after calling qsort.
2760 // Put the method ordering in the shared archive.
2761 if (JvmtiExport::can_maintain_original_method_order() || CDSConfig::is_dumping_archive()) {
2762 for (int index = 0; index < length; index++) {
2763 Method* const m = methods->at(index);
2764 assert(!m->valid_vtable_index(), "vtable index should not be set");
2765 m->set_vtable_index(index);
2766 }
2767 }
2768 // Sort method array by ascending method name (for faster lookups & vtable construction)
2769 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2770 Method::sort_methods(methods);
2771
2772 intArray* method_ordering = nullptr;
2773 // If JVMTI original method ordering or sharing is enabled construct int
2774 // array remembering the original ordering
2775 if (JvmtiExport::can_maintain_original_method_order() || CDSConfig::is_dumping_archive()) {
2776 method_ordering = new intArray(length, length, -1);
2777 for (int index = 0; index < length; index++) {
2778 Method* const m = methods->at(index);
2779 const int old_index = m->vtable_index();
2780 assert(old_index >= 0 && old_index < length, "invalid method index");
2781 method_ordering->at_put(index, old_index);
2782 m->set_vtable_index(Method::invalid_vtable_index);
2783 }
2784 }
2785 return method_ordering;
2786 }
2787
2788 // Parse generic_signature attribute for methods and fields
2789 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2790 TRAPS) {
2791 assert(cfs != nullptr, "invariant");
2792
2793 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2794 const u2 generic_signature_index = cfs->get_u2_fast();
2795 guarantee_property(
2796 valid_symbol_at(generic_signature_index),
2797 "Invalid Signature attribute at constant pool index %u in class file %s",
2798 generic_signature_index, CHECK_0);
2799 return generic_signature_index;
2800 }
2801
2802 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2803 TRAPS) {
2804
2805 assert(cfs != nullptr, "invariant");
2806
2807 cfs->guarantee_more(2, CHECK); // sourcefile_index
2808 const u2 sourcefile_index = cfs->get_u2_fast();
2809 guarantee_property(
2810 valid_symbol_at(sourcefile_index),
2811 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2812 sourcefile_index, CHECK);
2813 set_class_sourcefile_index(sourcefile_index);
2814 }
2815
2816 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2817 int length,
2818 TRAPS) {
2819 assert(cfs != nullptr, "invariant");
2820
2821 const u1* const sde_buffer = cfs->current();
2822 assert(sde_buffer != nullptr, "null sde buffer");
2823
2824 // Don't bother storing it if there is no way to retrieve it
2825 if (JvmtiExport::can_get_source_debug_extension()) {
2826 assert((length+1) > length, "Overflow checking");
2827 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2828 for (int i = 0; i < length; i++) {
2829 sde[i] = sde_buffer[i];
2830 }
2831 sde[length] = '\0';
2832 set_class_sde_buffer((const char*)sde, length);
2833 }
2834 // Got utf8 string, set stream position forward
2835 cfs->skip_u1(length, CHECK);
2836 }
2837
2838
2839 // Inner classes can be static, private or protected (classic VM does this)
2840 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2841 JVM_ACC_PRIVATE | \
2842 JVM_ACC_PROTECTED | \
2843 JVM_ACC_STATIC \
2844 )
2845
2846 // Find index of the InnerClasses entry for the specified inner_class_info_index.
2847 // Return -1 if none is found.
2848 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
2849 Symbol* cp_klass_name = cp->klass_name_at(inner);
2850 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
2851 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
2852 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
2853 return idx;
2854 }
2855 }
2856 return -1;
2857 }
2858
2859 // Return the outer_class_info_index for the InnerClasses entry containing the
2860 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
2861 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
2862 if (inner == 0) return -1;
2863 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
2864 if (idx == -1) return -1;
2865 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
2866 return result;
2867 }
2868
2869 // Return true if circularity is found, false if no circularity is found.
2870 // Use Floyd's cycle finding algorithm.
2871 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
2872 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
2873 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
2874
2875 while (fast != -1 && fast != 0) {
2876 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
2877 return true; // found a circularity
2878 }
2879 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
2880 if (fast == -1) return false;
2881 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
2882 if (fast == -1) return false;
2883 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
2884 assert(slow != -1, "sanity check");
2885 }
2886 return false;
2887 }
2888
2889 // Loop through each InnerClasses entry checking for circularities and duplications
2890 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
2891 // return true if a circularity or entries with duplicate inner_class_info_indexes
2892 // are found.
2893 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
2894 // Loop through each InnerClasses entry.
2895 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
2896 // Return true if there are circular entries.
2897 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
2898 return true;
2899 }
2900 // Check if there are duplicate entries or entries with the same inner_class_info_index.
2901 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
2902 y += InstanceKlass::inner_class_next_offset) {
2903
2904 // 4347400: make sure there's no duplicate entry in the classes array
2905 if (_major_version >= JAVA_1_5_VERSION) {
2906 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
2907 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
2908 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
2909 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
2910 "Duplicate entry in InnerClasses attribute in class file %s",
2911 CHECK_(true));
2912 }
2913 // Return true if there are two entries with the same inner_class_info_index.
2914 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
2915 return true;
2916 }
2917 }
2918 }
2919 return false;
2920 }
2921
2922 // Return number of classes in the inner classes attribute table
2923 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
2924 const ConstantPool* cp,
2925 const u1* const inner_classes_attribute_start,
2926 bool parsed_enclosingmethod_attribute,
2927 u2 enclosing_method_class_index,
2928 u2 enclosing_method_method_index,
2929 TRAPS) {
2930 const u1* const current_mark = cfs->current();
2931 u2 length = 0;
2932 if (inner_classes_attribute_start != nullptr) {
2933 cfs->set_current(inner_classes_attribute_start);
2934 cfs->guarantee_more(2, CHECK_0); // length
2935 length = cfs->get_u2_fast();
2936 }
2937
2938 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2939 // method data:
2940 // [inner_class_info_index,
2941 // outer_class_info_index,
2942 // inner_name_index,
2943 // inner_class_access_flags,
2944 // ...
2945 // enclosing_method_class_index,
2946 // enclosing_method_method_index]
2947 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2948 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
2949 _inner_classes = inner_classes;
2950
2951 int index = 0;
2952 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2953 for (int n = 0; n < length; n++) {
2954 // Inner class index
2955 const u2 inner_class_info_index = cfs->get_u2_fast();
2956 guarantee_property(
2957 valid_klass_reference_at(inner_class_info_index),
2958 "inner_class_info_index %u has bad constant type in class file %s",
2959 inner_class_info_index, CHECK_0);
2960 // Outer class index
2961 const u2 outer_class_info_index = cfs->get_u2_fast();
2962 guarantee_property(
2963 outer_class_info_index == 0 ||
2964 valid_klass_reference_at(outer_class_info_index),
2965 "outer_class_info_index %u has bad constant type in class file %s",
2966 outer_class_info_index, CHECK_0);
2967
2968 if (outer_class_info_index != 0) {
2969 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
2970 char* bytes = (char*)outer_class_name->bytes();
2971 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
2972 "Outer class is an array class in class file %s", CHECK_0);
2973 }
2974 // Inner class name
2975 const u2 inner_name_index = cfs->get_u2_fast();
2976 guarantee_property(
2977 inner_name_index == 0 || valid_symbol_at(inner_name_index),
2978 "inner_name_index %u has bad constant type in class file %s",
2979 inner_name_index, CHECK_0);
2980 if (_need_verify) {
2981 guarantee_property(inner_class_info_index != outer_class_info_index,
2982 "Class is both outer and inner class in class file %s", CHECK_0);
2983 }
2984 // Access flags
2985 u2 flags;
2986 // JVM_ACC_MODULE is defined in JDK-9 and later.
2987 if (_major_version >= JAVA_9_VERSION) {
2988 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
2989 } else {
2990 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2991 }
2992 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2993 // Set abstract bit for old class files for backward compatibility
2994 flags |= JVM_ACC_ABSTRACT;
2995 }
2996 verify_legal_class_modifiers(flags, CHECK_0);
2997 AccessFlags inner_access_flags(flags);
2998
2999 inner_classes->at_put(index++, inner_class_info_index);
3000 inner_classes->at_put(index++, outer_class_info_index);
3001 inner_classes->at_put(index++, inner_name_index);
3002 inner_classes->at_put(index++, inner_access_flags.as_unsigned_short());
3003 }
3004
3005 // Check for circular and duplicate entries.
3006 bool has_circularity = false;
3007 if (_need_verify) {
3008 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3009 if (has_circularity) {
3010 // If circularity check failed then ignore InnerClasses attribute.
3011 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3012 index = 0;
3013 if (parsed_enclosingmethod_attribute) {
3014 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3015 _inner_classes = inner_classes;
3016 } else {
3017 _inner_classes = Universe::the_empty_short_array();
3018 }
3019 }
3020 }
3021 // Set EnclosingMethod class and method indexes.
3022 if (parsed_enclosingmethod_attribute) {
3023 inner_classes->at_put(index++, enclosing_method_class_index);
3024 inner_classes->at_put(index++, enclosing_method_method_index);
3025 }
3026 assert(index == size || has_circularity, "wrong size");
3027
3028 // Restore buffer's current position.
3029 cfs->set_current(current_mark);
3030
3031 return length;
3032 }
3033
3034 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3035 const u1* const nest_members_attribute_start,
3036 TRAPS) {
3037 const u1* const current_mark = cfs->current();
3038 u2 length = 0;
3039 if (nest_members_attribute_start != nullptr) {
3040 cfs->set_current(nest_members_attribute_start);
3041 cfs->guarantee_more(2, CHECK_0); // length
3042 length = cfs->get_u2_fast();
3043 }
3044 const int size = length;
3045 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3046 _nest_members = nest_members;
3047
3048 int index = 0;
3049 cfs->guarantee_more(2 * length, CHECK_0);
3050 for (int n = 0; n < length; n++) {
3051 const u2 class_info_index = cfs->get_u2_fast();
3052 guarantee_property(
3053 valid_klass_reference_at(class_info_index),
3054 "Nest member class_info_index %u has bad constant type in class file %s",
3055 class_info_index, CHECK_0);
3056 nest_members->at_put(index++, class_info_index);
3057 }
3058 assert(index == size, "wrong size");
3059
3060 // Restore buffer's current position.
3061 cfs->set_current(current_mark);
3062
3063 return length;
3064 }
3065
3066 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3067 const u1* const permitted_subclasses_attribute_start,
3068 TRAPS) {
3069 const u1* const current_mark = cfs->current();
3070 u2 length = 0;
3071 if (permitted_subclasses_attribute_start != nullptr) {
3072 cfs->set_current(permitted_subclasses_attribute_start);
3073 cfs->guarantee_more(2, CHECK_0); // length
3074 length = cfs->get_u2_fast();
3075 }
3076 const int size = length;
3077 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3078 _permitted_subclasses = permitted_subclasses;
3079
3080 if (length > 0) {
3081 int index = 0;
3082 cfs->guarantee_more(2 * length, CHECK_0);
3083 for (int n = 0; n < length; n++) {
3084 const u2 class_info_index = cfs->get_u2_fast();
3085 guarantee_property(
3086 valid_klass_reference_at(class_info_index),
3087 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3088 class_info_index, CHECK_0);
3089 permitted_subclasses->at_put(index++, class_info_index);
3090 }
3091 assert(index == size, "wrong size");
3092 }
3093
3094 // Restore buffer's current position.
3095 cfs->set_current(current_mark);
3096
3097 return length;
3098 }
3099
3100 // Record {
3101 // u2 attribute_name_index;
3102 // u4 attribute_length;
3103 // u2 components_count;
3104 // component_info components[components_count];
3105 // }
3106 // component_info {
3107 // u2 name_index;
3108 // u2 descriptor_index
3109 // u2 attributes_count;
3110 // attribute_info_attributes[attributes_count];
3111 // }
3112 u4 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3113 const ConstantPool* cp,
3114 const u1* const record_attribute_start,
3115 TRAPS) {
3116 const u1* const current_mark = cfs->current();
3117 int components_count = 0;
3118 unsigned int calculate_attr_size = 0;
3119 if (record_attribute_start != nullptr) {
3120 cfs->set_current(record_attribute_start);
3121 cfs->guarantee_more(2, CHECK_0); // num of components
3122 components_count = (int)cfs->get_u2_fast();
3123 calculate_attr_size = 2;
3124 }
3125
3126 Array<RecordComponent*>* const record_components =
3127 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, nullptr, CHECK_0);
3128 _record_components = record_components;
3129
3130 for (int x = 0; x < components_count; x++) {
3131 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3132
3133 const u2 name_index = cfs->get_u2_fast();
3134 guarantee_property(valid_symbol_at(name_index),
3135 "Invalid constant pool index %u for name in Record attribute in class file %s",
3136 name_index, CHECK_0);
3137 const Symbol* const name = cp->symbol_at(name_index);
3138 verify_legal_field_name(name, CHECK_0);
3139
3140 const u2 descriptor_index = cfs->get_u2_fast();
3141 guarantee_property(valid_symbol_at(descriptor_index),
3142 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3143 descriptor_index, CHECK_0);
3144 const Symbol* const descr = cp->symbol_at(descriptor_index);
3145 verify_legal_field_signature(name, descr, CHECK_0);
3146
3147 const u2 attributes_count = cfs->get_u2_fast();
3148 calculate_attr_size += 6;
3149 u2 generic_sig_index = 0;
3150 const u1* runtime_visible_annotations = nullptr;
3151 int runtime_visible_annotations_length = 0;
3152 bool runtime_invisible_annotations_exists = false;
3153 const u1* runtime_visible_type_annotations = nullptr;
3154 int runtime_visible_type_annotations_length = 0;
3155 bool runtime_invisible_type_annotations_exists = false;
3156
3157 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3158 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3159 for (int y = 0; y < attributes_count; y++) {
3160 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3161 const u2 attribute_name_index = cfs->get_u2_fast();
3162 const u4 attribute_length = cfs->get_u4_fast();
3163 calculate_attr_size += 6;
3164 guarantee_property(
3165 valid_symbol_at(attribute_name_index),
3166 "Invalid Record attribute name index %u in class file %s",
3167 attribute_name_index, CHECK_0);
3168
3169 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3170 if (attribute_name == vmSymbols::tag_signature()) {
3171 if (generic_sig_index != 0) {
3172 classfile_parse_error(
3173 "Multiple Signature attributes for Record component in class file %s",
3174 THREAD);
3175 return 0;
3176 }
3177 if (attribute_length != 2) {
3178 classfile_parse_error(
3179 "Invalid Signature attribute length %u in Record component in class file %s",
3180 attribute_length, THREAD);
3181 return 0;
3182 }
3183 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3184
3185 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3186 if (runtime_visible_annotations != nullptr) {
3187 classfile_parse_error(
3188 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3189 return 0;
3190 }
3191 runtime_visible_annotations_length = attribute_length;
3192 runtime_visible_annotations = cfs->current();
3193
3194 assert(runtime_visible_annotations != nullptr, "null record component visible annotation");
3195 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3196 cfs->skip_u1_fast(runtime_visible_annotations_length);
3197
3198 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3199 if (runtime_invisible_annotations_exists) {
3200 classfile_parse_error(
3201 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3202 return 0;
3203 }
3204 runtime_invisible_annotations_exists = true;
3205 cfs->skip_u1(attribute_length, CHECK_0);
3206
3207 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3208 if (runtime_visible_type_annotations != nullptr) {
3209 classfile_parse_error(
3210 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3211 return 0;
3212 }
3213 runtime_visible_type_annotations_length = attribute_length;
3214 runtime_visible_type_annotations = cfs->current();
3215
3216 assert(runtime_visible_type_annotations != nullptr, "null record component visible type annotation");
3217 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3218 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3219
3220 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3221 if (runtime_invisible_type_annotations_exists) {
3222 classfile_parse_error(
3223 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3224 return 0;
3225 }
3226 runtime_invisible_type_annotations_exists = true;
3227 cfs->skip_u1(attribute_length, CHECK_0);
3228
3229 } else {
3230 // Skip unknown attributes
3231 cfs->skip_u1(attribute_length, CHECK_0);
3232 }
3233 calculate_attr_size += attribute_length;
3234 } // End of attributes For loop
3235
3236 AnnotationArray* annotations = allocate_annotations(runtime_visible_annotations,
3237 runtime_visible_annotations_length,
3238 CHECK_0);
3239 AnnotationArray* type_annotations = allocate_annotations(runtime_visible_type_annotations,
3240 runtime_visible_type_annotations_length,
3241 CHECK_0);
3242
3243 RecordComponent* record_component =
3244 RecordComponent::allocate(_loader_data, name_index, descriptor_index, generic_sig_index,
3245 annotations, type_annotations, CHECK_0);
3246 record_components->at_put(x, record_component);
3247 } // End of component processing loop
3248
3249 // Restore buffer's current position.
3250 cfs->set_current(current_mark);
3251 return calculate_attr_size;
3252 }
3253
3254 void ClassFileParser::parse_classfile_synthetic_attribute() {
3255 set_class_synthetic_flag(true);
3256 }
3257
3258 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3259 assert(cfs != nullptr, "invariant");
3260
3261 const u2 signature_index = cfs->get_u2(CHECK);
3262 guarantee_property(
3263 valid_symbol_at(signature_index),
3264 "Invalid constant pool index %u in Signature attribute in class file %s",
3265 signature_index, CHECK);
3266 set_class_generic_signature_index(signature_index);
3267 }
3268
3269 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3270 ConstantPool* cp,
3271 u4 attribute_byte_length,
3272 TRAPS) {
3273 assert(cfs != nullptr, "invariant");
3274 assert(cp != nullptr, "invariant");
3275
3276 const u1* const current_start = cfs->current();
3277
3278 guarantee_property(attribute_byte_length >= sizeof(u2),
3279 "Invalid BootstrapMethods attribute length %u in class file %s",
3280 attribute_byte_length,
3281 CHECK);
3282
3283 cfs->guarantee_more(attribute_byte_length, CHECK);
3284
3285 const int attribute_array_length = cfs->get_u2_fast();
3286
3287 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3288 "Short length on BootstrapMethods in class file %s",
3289 CHECK);
3290
3291
3292 // The attribute contains a counted array of counted tuples of shorts,
3293 // represending bootstrap specifiers:
3294 // length*{bootstrap_method_index, argument_count*{argument_index}}
3295 const unsigned int operand_count = (attribute_byte_length - (unsigned)sizeof(u2)) / (unsigned)sizeof(u2);
3296 // operand_count = number of shorts in attr, except for leading length
3297
3298 // The attribute is copied into a short[] array.
3299 // The array begins with a series of short[2] pairs, one for each tuple.
3300 const int index_size = (attribute_array_length * 2);
3301
3302 Array<u2>* const operands =
3303 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3304
3305 // Eagerly assign operands so they will be deallocated with the constant
3306 // pool if there is an error.
3307 cp->set_operands(operands);
3308
3309 int operand_fill_index = index_size;
3310 const int cp_size = cp->length();
3311
3312 for (int n = 0; n < attribute_array_length; n++) {
3313 // Store a 32-bit offset into the header of the operand array.
3314 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3315
3316 // Read a bootstrap specifier.
3317 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3318 const u2 bootstrap_method_index = cfs->get_u2_fast();
3319 const u2 argument_count = cfs->get_u2_fast();
3320 guarantee_property(
3321 valid_cp_range(bootstrap_method_index, cp_size) &&
3322 cp->tag_at(bootstrap_method_index).is_method_handle(),
3323 "bootstrap_method_index %u has bad constant type in class file %s",
3324 bootstrap_method_index,
3325 CHECK);
3326
3327 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3328 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3329 CHECK);
3330
3331 operands->at_put(operand_fill_index++, bootstrap_method_index);
3332 operands->at_put(operand_fill_index++, argument_count);
3333
3334 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3335 for (int j = 0; j < argument_count; j++) {
3336 const u2 argument_index = cfs->get_u2_fast();
3337 guarantee_property(
3338 valid_cp_range(argument_index, cp_size) &&
3339 cp->tag_at(argument_index).is_loadable_constant(),
3340 "argument_index %u has bad constant type in class file %s",
3341 argument_index,
3342 CHECK);
3343 operands->at_put(operand_fill_index++, argument_index);
3344 }
3345 }
3346 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3347 "Bad length on BootstrapMethods in class file %s",
3348 CHECK);
3349 }
3350
3351 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3352 ConstantPool* cp,
3353 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3354 TRAPS) {
3355 assert(cfs != nullptr, "invariant");
3356 assert(cp != nullptr, "invariant");
3357 assert(parsed_annotations != nullptr, "invariant");
3358
3359 // Set inner classes attribute to default sentinel
3360 _inner_classes = Universe::the_empty_short_array();
3361 // Set nest members attribute to default sentinel
3362 _nest_members = Universe::the_empty_short_array();
3363 // Set _permitted_subclasses attribute to default sentinel
3364 _permitted_subclasses = Universe::the_empty_short_array();
3365 cfs->guarantee_more(2, CHECK); // attributes_count
3366 u2 attributes_count = cfs->get_u2_fast();
3367 bool parsed_sourcefile_attribute = false;
3368 bool parsed_innerclasses_attribute = false;
3369 bool parsed_nest_members_attribute = false;
3370 bool parsed_permitted_subclasses_attribute = false;
3371 bool parsed_nest_host_attribute = false;
3372 bool parsed_record_attribute = false;
3373 bool parsed_enclosingmethod_attribute = false;
3374 bool parsed_bootstrap_methods_attribute = false;
3375 const u1* runtime_visible_annotations = nullptr;
3376 int runtime_visible_annotations_length = 0;
3377 const u1* runtime_visible_type_annotations = nullptr;
3378 int runtime_visible_type_annotations_length = 0;
3379 bool runtime_invisible_type_annotations_exists = false;
3380 bool runtime_invisible_annotations_exists = false;
3381 bool parsed_source_debug_ext_annotations_exist = false;
3382 const u1* inner_classes_attribute_start = nullptr;
3383 u4 inner_classes_attribute_length = 0;
3384 u2 enclosing_method_class_index = 0;
3385 u2 enclosing_method_method_index = 0;
3386 const u1* nest_members_attribute_start = nullptr;
3387 u4 nest_members_attribute_length = 0;
3388 const u1* record_attribute_start = nullptr;
3389 u4 record_attribute_length = 0;
3390 const u1* permitted_subclasses_attribute_start = nullptr;
3391 u4 permitted_subclasses_attribute_length = 0;
3392
3393 // Iterate over attributes
3394 while (attributes_count--) {
3395 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3396 const u2 attribute_name_index = cfs->get_u2_fast();
3397 const u4 attribute_length = cfs->get_u4_fast();
3398 guarantee_property(
3399 valid_symbol_at(attribute_name_index),
3400 "Attribute name has bad constant pool index %u in class file %s",
3401 attribute_name_index, CHECK);
3402 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3403 if (tag == vmSymbols::tag_source_file()) {
3404 // Check for SourceFile tag
3405 if (_need_verify) {
3406 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3407 }
3408 if (parsed_sourcefile_attribute) {
3409 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3410 return;
3411 } else {
3412 parsed_sourcefile_attribute = true;
3413 }
3414 parse_classfile_sourcefile_attribute(cfs, CHECK);
3415 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3416 // Check for SourceDebugExtension tag
3417 if (parsed_source_debug_ext_annotations_exist) {
3418 classfile_parse_error(
3419 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3420 return;
3421 }
3422 parsed_source_debug_ext_annotations_exist = true;
3423 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3424 } else if (tag == vmSymbols::tag_inner_classes()) {
3425 // Check for InnerClasses tag
3426 if (parsed_innerclasses_attribute) {
3427 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3428 return;
3429 } else {
3430 parsed_innerclasses_attribute = true;
3431 }
3432 inner_classes_attribute_start = cfs->current();
3433 inner_classes_attribute_length = attribute_length;
3434 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3435 } else if (tag == vmSymbols::tag_synthetic()) {
3436 // Check for Synthetic tag
3437 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3438 if (attribute_length != 0) {
3439 classfile_parse_error(
3440 "Invalid Synthetic classfile attribute length %u in class file %s",
3441 attribute_length, THREAD);
3442 return;
3443 }
3444 parse_classfile_synthetic_attribute();
3445 } else if (tag == vmSymbols::tag_deprecated()) {
3446 // Check for Deprecated tag - 4276120
3447 if (attribute_length != 0) {
3448 classfile_parse_error(
3449 "Invalid Deprecated classfile attribute length %u in class file %s",
3450 attribute_length, THREAD);
3451 return;
3452 }
3453 } else if (_major_version >= JAVA_1_5_VERSION) {
3454 if (tag == vmSymbols::tag_signature()) {
3455 if (_generic_signature_index != 0) {
3456 classfile_parse_error(
3457 "Multiple Signature attributes in class file %s", THREAD);
3458 return;
3459 }
3460 if (attribute_length != 2) {
3461 classfile_parse_error(
3462 "Wrong Signature attribute length %u in class file %s",
3463 attribute_length, THREAD);
3464 return;
3465 }
3466 parse_classfile_signature_attribute(cfs, CHECK);
3467 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3468 if (runtime_visible_annotations != nullptr) {
3469 classfile_parse_error(
3470 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3471 return;
3472 }
3473 runtime_visible_annotations_length = attribute_length;
3474 runtime_visible_annotations = cfs->current();
3475 assert(runtime_visible_annotations != nullptr, "null visible annotations");
3476 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3477 parse_annotations(cp,
3478 runtime_visible_annotations,
3479 runtime_visible_annotations_length,
3480 parsed_annotations,
3481 _loader_data,
3482 _can_access_vm_annotations);
3483 cfs->skip_u1_fast(runtime_visible_annotations_length);
3484 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3485 if (runtime_invisible_annotations_exists) {
3486 classfile_parse_error(
3487 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3488 return;
3489 }
3490 runtime_invisible_annotations_exists = true;
3491 cfs->skip_u1(attribute_length, CHECK);
3492 } else if (tag == vmSymbols::tag_enclosing_method()) {
3493 if (parsed_enclosingmethod_attribute) {
3494 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3495 return;
3496 } else {
3497 parsed_enclosingmethod_attribute = true;
3498 }
3499 guarantee_property(attribute_length == 4,
3500 "Wrong EnclosingMethod attribute length %u in class file %s",
3501 attribute_length, CHECK);
3502 cfs->guarantee_more(4, CHECK); // class_index, method_index
3503 enclosing_method_class_index = cfs->get_u2_fast();
3504 enclosing_method_method_index = cfs->get_u2_fast();
3505 if (enclosing_method_class_index == 0) {
3506 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3507 return;
3508 }
3509 // Validate the constant pool indices and types
3510 guarantee_property(valid_klass_reference_at(enclosing_method_class_index),
3511 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3512 if (enclosing_method_method_index != 0 &&
3513 (!cp->is_within_bounds(enclosing_method_method_index) ||
3514 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3515 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3516 return;
3517 }
3518 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3519 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3520 if (parsed_bootstrap_methods_attribute) {
3521 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3522 return;
3523 }
3524 parsed_bootstrap_methods_attribute = true;
3525 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3526 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3527 if (runtime_visible_type_annotations != nullptr) {
3528 classfile_parse_error(
3529 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3530 return;
3531 }
3532 runtime_visible_type_annotations_length = attribute_length;
3533 runtime_visible_type_annotations = cfs->current();
3534 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
3535 // No need for the VM to parse Type annotations
3536 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3537 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3538 if (runtime_invisible_type_annotations_exists) {
3539 classfile_parse_error(
3540 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3541 return;
3542 }
3543 runtime_invisible_type_annotations_exists = true;
3544 cfs->skip_u1(attribute_length, CHECK);
3545 } else if (_major_version >= JAVA_11_VERSION) {
3546 if (tag == vmSymbols::tag_nest_members()) {
3547 // Check for NestMembers tag
3548 if (parsed_nest_members_attribute) {
3549 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3550 return;
3551 } else {
3552 parsed_nest_members_attribute = true;
3553 }
3554 if (parsed_nest_host_attribute) {
3555 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3556 return;
3557 }
3558 nest_members_attribute_start = cfs->current();
3559 nest_members_attribute_length = attribute_length;
3560 cfs->skip_u1(nest_members_attribute_length, CHECK);
3561 } else if (tag == vmSymbols::tag_nest_host()) {
3562 if (parsed_nest_host_attribute) {
3563 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
3564 return;
3565 } else {
3566 parsed_nest_host_attribute = true;
3567 }
3568 if (parsed_nest_members_attribute) {
3569 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
3570 return;
3571 }
3572 if (_need_verify) {
3573 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3574 }
3575 cfs->guarantee_more(2, CHECK);
3576 u2 class_info_index = cfs->get_u2_fast();
3577 guarantee_property(
3578 valid_klass_reference_at(class_info_index),
3579 "Nest-host class_info_index %u has bad constant type in class file %s",
3580 class_info_index, CHECK);
3581 _nest_host = class_info_index;
3582
3583 } else if (_major_version >= JAVA_16_VERSION) {
3584 if (tag == vmSymbols::tag_record()) {
3585 if (parsed_record_attribute) {
3586 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
3587 return;
3588 }
3589 parsed_record_attribute = true;
3590 record_attribute_start = cfs->current();
3591 record_attribute_length = attribute_length;
3592 } else if (_major_version >= JAVA_17_VERSION) {
3593 if (tag == vmSymbols::tag_permitted_subclasses()) {
3594 if (parsed_permitted_subclasses_attribute) {
3595 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3596 return;
3597 }
3598 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3599 if (_access_flags.is_final()) {
3600 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3601 return;
3602 }
3603 parsed_permitted_subclasses_attribute = true;
3604 permitted_subclasses_attribute_start = cfs->current();
3605 permitted_subclasses_attribute_length = attribute_length;
3606 }
3607 }
3608 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3609 cfs->skip_u1(attribute_length, CHECK);
3610 } else {
3611 // Unknown attribute
3612 cfs->skip_u1(attribute_length, CHECK);
3613 }
3614 } else {
3615 // Unknown attribute
3616 cfs->skip_u1(attribute_length, CHECK);
3617 }
3618 } else {
3619 // Unknown attribute
3620 cfs->skip_u1(attribute_length, CHECK);
3621 }
3622 }
3623 _class_annotations = allocate_annotations(runtime_visible_annotations,
3624 runtime_visible_annotations_length,
3625 CHECK);
3626 _class_type_annotations = allocate_annotations(runtime_visible_type_annotations,
3627 runtime_visible_type_annotations_length,
3628 CHECK);
3629
3630 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3631 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3632 cfs,
3633 cp,
3634 inner_classes_attribute_start,
3635 parsed_innerclasses_attribute,
3636 enclosing_method_class_index,
3637 enclosing_method_method_index,
3638 CHECK);
3639 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3640 guarantee_property(
3641 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3642 "Wrong InnerClasses attribute length in class file %s", CHECK);
3643 }
3644 }
3645
3646 if (parsed_nest_members_attribute) {
3647 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3648 cfs,
3649 nest_members_attribute_start,
3650 CHECK);
3651 if (_need_verify) {
3652 guarantee_property(
3653 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3654 "Wrong NestMembers attribute length in class file %s", CHECK);
3655 }
3656 }
3657
3658 if (parsed_record_attribute) {
3659 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
3660 cfs,
3661 cp,
3662 record_attribute_start,
3663 CHECK);
3664 if (_need_verify) {
3665 guarantee_property(record_attribute_length == calculated_attr_length,
3666 "Record attribute has wrong length in class file %s",
3667 CHECK);
3668 }
3669 }
3670
3671 if (parsed_permitted_subclasses_attribute) {
3672 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3673 cfs,
3674 permitted_subclasses_attribute_start,
3675 CHECK);
3676 if (_need_verify) {
3677 guarantee_property(
3678 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3679 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3680 }
3681 }
3682
3683 if (_max_bootstrap_specifier_index >= 0) {
3684 guarantee_property(parsed_bootstrap_methods_attribute,
3685 "Missing BootstrapMethods attribute in class file %s", CHECK);
3686 }
3687 }
3688
3689 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3690 assert(k != nullptr, "invariant");
3691
3692 if (_synthetic_flag)
3693 k->set_is_synthetic();
3694 if (_sourcefile_index != 0) {
3695 k->set_source_file_name_index(_sourcefile_index);
3696 }
3697 if (_generic_signature_index != 0) {
3698 k->set_generic_signature_index(_generic_signature_index);
3699 }
3700 if (_sde_buffer != nullptr) {
3701 k->set_source_debug_extension(_sde_buffer, _sde_length);
3702 }
3703 }
3704
3705 // Create the Annotations object that will
3706 // hold the annotations array for the Klass.
3707 void ClassFileParser::create_combined_annotations(TRAPS) {
3708 if (_class_annotations == nullptr &&
3709 _class_type_annotations == nullptr &&
3710 _fields_annotations == nullptr &&
3711 _fields_type_annotations == nullptr) {
3712 // Don't create the Annotations object unnecessarily.
3713 return;
3714 }
3715
3716 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3717 annotations->set_class_annotations(_class_annotations);
3718 annotations->set_class_type_annotations(_class_type_annotations);
3719 annotations->set_fields_annotations(_fields_annotations);
3720 annotations->set_fields_type_annotations(_fields_type_annotations);
3721
3722 // This is the Annotations object that will be
3723 // assigned to InstanceKlass being constructed.
3724 _combined_annotations = annotations;
3725
3726 // The annotations arrays below has been transferred the
3727 // _combined_annotations so these fields can now be cleared.
3728 _class_annotations = nullptr;
3729 _class_type_annotations = nullptr;
3730 _fields_annotations = nullptr;
3731 _fields_type_annotations = nullptr;
3732 }
3733
3734 // Transfer ownership of metadata allocated to the InstanceKlass.
3735 void ClassFileParser::apply_parsed_class_metadata(
3736 InstanceKlass* this_klass,
3737 int java_fields_count) {
3738 assert(this_klass != nullptr, "invariant");
3739
3740 _cp->set_pool_holder(this_klass);
3741 this_klass->set_constants(_cp);
3742 this_klass->set_fieldinfo_stream(_fieldinfo_stream);
3743 this_klass->set_fieldinfo_search_table(_fieldinfo_search_table);
3744 this_klass->set_fields_status(_fields_status);
3745 this_klass->set_methods(_methods);
3746 this_klass->set_inner_classes(_inner_classes);
3747 this_klass->set_nest_members(_nest_members);
3748 this_klass->set_nest_host_index(_nest_host);
3749 this_klass->set_annotations(_combined_annotations);
3750 this_klass->set_permitted_subclasses(_permitted_subclasses);
3751 this_klass->set_record_components(_record_components);
3752
3753 DEBUG_ONLY(FieldInfoStream::validate_search_table(_cp, _fieldinfo_stream, _fieldinfo_search_table));
3754
3755 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3756 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3757 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3758 // its _super. If an OOM occurs while loading the current klass, its _super field
3759 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3760 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3761 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3762
3763 // Clear out these fields so they don't get deallocated by the destructor
3764 clear_class_metadata();
3765 }
3766
3767 AnnotationArray* ClassFileParser::allocate_annotations(const u1* const anno,
3768 int anno_length,
3769 TRAPS) {
3770 AnnotationArray* annotations = nullptr;
3771 if (anno != nullptr) {
3772 annotations = MetadataFactory::new_array<u1>(_loader_data,
3773 anno_length,
3774 CHECK_(annotations));
3775 for (int i = 0; i < anno_length; i++) {
3776 annotations->at_put(i, anno[i]);
3777 }
3778 }
3779 return annotations;
3780 }
3781
3782 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3783 const int super_class_index,
3784 const bool need_verify,
3785 TRAPS) {
3786 assert(cp != nullptr, "invariant");
3787 const InstanceKlass* super_klass = nullptr;
3788
3789 if (super_class_index == 0) {
3790 guarantee_property(_class_name == vmSymbols::java_lang_Object(),
3791 "Invalid superclass index %u in class file %s",
3792 super_class_index,
3793 CHECK_NULL);
3794 } else {
3795 guarantee_property(valid_klass_reference_at(super_class_index),
3796 "Invalid superclass index %u in class file %s",
3797 super_class_index,
3798 CHECK_NULL);
3799 // The class name should be legal because it is checked when parsing constant pool.
3800 // However, make sure it is not an array type.
3801 bool is_array = false;
3802 if (cp->tag_at(super_class_index).is_klass()) {
3803 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3804 if (need_verify)
3805 is_array = super_klass->is_array_klass();
3806 } else if (need_verify) {
3807 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3808 }
3809 if (need_verify) {
3810 guarantee_property(!is_array,
3811 "Bad superclass name in class file %s", CHECK_NULL);
3812 }
3813 }
3814 return super_klass;
3815 }
3816
3817 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
3818 _max_nonstatic_oop_maps = max_blocks;
3819 _nonstatic_oop_map_count = 0;
3820 if (max_blocks == 0) {
3821 _nonstatic_oop_maps = nullptr;
3822 } else {
3823 _nonstatic_oop_maps =
3824 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
3825 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3826 }
3827 }
3828
3829 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
3830 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
3831 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
3832 }
3833
3834 // addition of super oop maps
3835 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3836 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
3837 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
3838
3839 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3840 _nonstatic_oop_map_count += nof_blocks;
3841 }
3842
3843 // collection of oops
3844 void OopMapBlocksBuilder::add(int offset, int count) {
3845 if (_nonstatic_oop_map_count == 0) {
3846 _nonstatic_oop_map_count++;
3847 }
3848 OopMapBlock* nonstatic_oop_map = last_oop_map();
3849 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3850 nonstatic_oop_map->set_offset(offset);
3851 nonstatic_oop_map->set_count(count);
3852 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3853 nonstatic_oop_map->increment_count(count);
3854 } else { // Need a new one...
3855 _nonstatic_oop_map_count++;
3856 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
3857 nonstatic_oop_map = last_oop_map();
3858 nonstatic_oop_map->set_offset(offset);
3859 nonstatic_oop_map->set_count(count);
3860 }
3861 }
3862
3863 // general purpose copy, e.g. into allocated instanceKlass
3864 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
3865 if (_nonstatic_oop_map_count != 0) {
3866 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
3867 }
3868 }
3869
3870 // Sort and compact adjacent blocks
3871 void OopMapBlocksBuilder::compact() {
3872 if (_nonstatic_oop_map_count <= 1) {
3873 return;
3874 }
3875 /*
3876 * Since field layout sneaks in oops before values, we will be able to condense
3877 * blocks. There is potential to compact between super, own refs and values
3878 * containing refs.
3879 *
3880 * Currently compaction is slightly limited due to values being 8 byte aligned.
3881 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
3882 * and maybe it doesn't need to be.
3883 */
3884 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
3885 (_sort_Fn)OopMapBlock::compare_offset);
3886 if (_nonstatic_oop_map_count < 2) {
3887 return;
3888 }
3889
3890 // Make a temp copy, and iterate through and copy back into the original
3891 ResourceMark rm;
3892 OopMapBlock* oop_maps_copy =
3893 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
3894 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
3895 copy(oop_maps_copy);
3896 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
3897 unsigned int new_count = 1;
3898 oop_maps_copy++;
3899 while(oop_maps_copy < oop_maps_copy_end) {
3900 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3901 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3902 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3903 } else {
3904 nonstatic_oop_map++;
3905 new_count++;
3906 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3907 nonstatic_oop_map->set_count(oop_maps_copy->count());
3908 }
3909 oop_maps_copy++;
3910 }
3911 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
3912 _nonstatic_oop_map_count = new_count;
3913 }
3914
3915 void OopMapBlocksBuilder::print_on(outputStream* st) const {
3916 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
3917 if (_nonstatic_oop_map_count > 0) {
3918 OopMapBlock* map = _nonstatic_oop_maps;
3919 OopMapBlock* last_map = last_oop_map();
3920 assert(map <= last_map, "Last less than first");
3921 while (map <= last_map) {
3922 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3923 map->offset() + map->offset_span() - heapOopSize, map->count());
3924 map++;
3925 }
3926 }
3927 }
3928
3929 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
3930 print_on(st);
3931 }
3932
3933 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
3934 assert(ik != nullptr, "invariant");
3935
3936 const InstanceKlass* const super = ik->java_super();
3937
3938 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3939 // in which case we don't have to register objects as finalizable
3940 if (!_has_empty_finalizer) {
3941 if (_has_finalizer ||
3942 (super != nullptr && super->has_finalizer())) {
3943 ik->set_has_finalizer();
3944 }
3945 }
3946
3947 #ifdef ASSERT
3948 bool f = false;
3949 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
3950 vmSymbols::void_method_signature());
3951 if (InstanceKlass::is_finalization_enabled() &&
3952 (m != nullptr) && !m->is_empty_method()) {
3953 f = true;
3954 }
3955
3956 // Spec doesn't prevent agent from redefinition of empty finalizer.
3957 // Despite the fact that it's generally bad idea and redefined finalizer
3958 // will not work as expected we shouldn't abort vm in this case
3959 if (!ik->has_redefined_this_or_super()) {
3960 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
3961 }
3962 #endif
3963
3964 // Check if this klass supports the java.lang.Cloneable interface
3965 if (vmClasses::Cloneable_klass_loaded()) {
3966 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
3967 ik->set_is_cloneable();
3968 }
3969 }
3970
3971 // If it cannot be fast-path allocated, set a bit in the layout helper.
3972 // See documentation of InstanceKlass::can_be_fastpath_allocated().
3973 assert(ik->size_helper() > 0, "layout_helper is initialized");
3974 if (ik->is_abstract() || ik->is_interface()
3975 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == nullptr)
3976 || ik->size_helper() >= FastAllocateSizeLimit) {
3977 // Forbid fast-path allocation.
3978 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
3979 ik->set_layout_helper(lh);
3980 }
3981 }
3982
3983 // utility methods for appending an array with check for duplicates
3984
3985 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
3986 const Array<InstanceKlass*>* const ifs) {
3987 // iterate over new interfaces
3988 for (int i = 0; i < ifs->length(); i++) {
3989 InstanceKlass* const e = ifs->at(i);
3990 assert(e->is_klass() && e->is_interface(), "just checking");
3991 // add new interface
3992 result->append_if_missing(e);
3993 }
3994 }
3995
3996 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
3997 Array<InstanceKlass*>* local_ifs,
3998 ClassLoaderData* loader_data,
3999 TRAPS) {
4000 assert(local_ifs != nullptr, "invariant");
4001 assert(loader_data != nullptr, "invariant");
4002
4003 // Compute maximum size for transitive interfaces
4004 int max_transitive_size = 0;
4005 int super_size = 0;
4006 // Add superclass transitive interfaces size
4007 if (super != nullptr) {
4008 super_size = super->transitive_interfaces()->length();
4009 max_transitive_size += super_size;
4010 }
4011 // Add local interfaces' super interfaces
4012 const int local_size = local_ifs->length();
4013 for (int i = 0; i < local_size; i++) {
4014 InstanceKlass* const l = local_ifs->at(i);
4015 max_transitive_size += l->transitive_interfaces()->length();
4016 }
4017 // Finally add local interfaces
4018 max_transitive_size += local_size;
4019 // Construct array
4020 if (max_transitive_size == 0) {
4021 // no interfaces, use canonicalized array
4022 return Universe::the_empty_instance_klass_array();
4023 } else if (max_transitive_size == super_size) {
4024 // no new local interfaces added, share superklass' transitive interface array
4025 return super->transitive_interfaces();
4026 } else if (max_transitive_size == local_size) {
4027 // only local interfaces added, share local interface array
4028 return local_ifs;
4029 } else {
4030 ResourceMark rm;
4031 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4032
4033 // Copy down from superclass
4034 if (super != nullptr) {
4035 append_interfaces(result, super->transitive_interfaces());
4036 }
4037
4038 // Copy down from local interfaces' superinterfaces
4039 for (int i = 0; i < local_size; i++) {
4040 InstanceKlass* const l = local_ifs->at(i);
4041 append_interfaces(result, l->transitive_interfaces());
4042 }
4043 // Finally add local interfaces
4044 append_interfaces(result, local_ifs);
4045
4046 // length will be less than the max_transitive_size if duplicates were removed
4047 const int length = result->length();
4048 assert(length <= max_transitive_size, "just checking");
4049 Array<InstanceKlass*>* const new_result =
4050 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4051 for (int i = 0; i < length; i++) {
4052 InstanceKlass* const e = result->at(i);
4053 assert(e != nullptr, "just checking");
4054 new_result->at_put(i, e);
4055 }
4056 return new_result;
4057 }
4058 }
4059
4060 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4061 assert(this_klass != nullptr, "invariant");
4062 const Klass* const super = this_klass->super();
4063
4064 if (super != nullptr) {
4065 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4066
4067 if (super->is_final()) {
4068 classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4069 return;
4070 }
4071
4072 if (super_ik->is_sealed()) {
4073 stringStream ss;
4074 ResourceMark rm(THREAD);
4075 if (!super_ik->has_as_permitted_subclass(this_klass, ss)) {
4076 classfile_icce_error(ss.as_string(), THREAD);
4077 return;
4078 }
4079 }
4080
4081 Reflection::VerifyClassAccessResults vca_result =
4082 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4083 if (vca_result != Reflection::ACCESS_OK) {
4084 ResourceMark rm(THREAD);
4085 char* msg = Reflection::verify_class_access_msg(this_klass,
4086 InstanceKlass::cast(super),
4087 vca_result);
4088
4089 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4090 if (msg == nullptr) {
4091 bool same_module = (this_klass->module() == super->module());
4092 Exceptions::fthrow(
4093 THREAD_AND_LOCATION,
4094 vmSymbols::java_lang_IllegalAccessError(),
4095 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4096 this_klass->external_name(),
4097 super->is_abstract() ? "abstract " : "",
4098 super->external_name(),
4099 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4100 (same_module) ? "" : "; ",
4101 (same_module) ? "" : super->class_in_module_of_loader());
4102 } else {
4103 // Add additional message content.
4104 Exceptions::fthrow(
4105 THREAD_AND_LOCATION,
4106 vmSymbols::java_lang_IllegalAccessError(),
4107 "superclass access check failed: %s",
4108 msg);
4109 }
4110 }
4111 }
4112 }
4113
4114
4115 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4116 assert(this_klass != nullptr, "invariant");
4117 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4118 const int lng = local_interfaces->length();
4119 for (int i = lng - 1; i >= 0; i--) {
4120 InstanceKlass* const k = local_interfaces->at(i);
4121 assert (k != nullptr && k->is_interface(), "invalid interface");
4122
4123 if (k->is_sealed()) {
4124 stringStream ss;
4125 ResourceMark rm(THREAD);
4126 if (!k->has_as_permitted_subclass(this_klass, ss)) {
4127 classfile_icce_error(ss.as_string(), THREAD);
4128 return;
4129 }
4130 }
4131
4132 Reflection::VerifyClassAccessResults vca_result =
4133 Reflection::verify_class_access(this_klass, k, false);
4134 if (vca_result != Reflection::ACCESS_OK) {
4135 ResourceMark rm(THREAD);
4136 char* msg = Reflection::verify_class_access_msg(this_klass,
4137 k,
4138 vca_result);
4139
4140 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4141 if (msg == nullptr) {
4142 bool same_module = (this_klass->module() == k->module());
4143 Exceptions::fthrow(
4144 THREAD_AND_LOCATION,
4145 vmSymbols::java_lang_IllegalAccessError(),
4146 "class %s cannot access its superinterface %s (%s%s%s)",
4147 this_klass->external_name(),
4148 k->external_name(),
4149 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4150 (same_module) ? "" : "; ",
4151 (same_module) ? "" : k->class_in_module_of_loader());
4152 return;
4153 } else {
4154 // Add additional message content.
4155 Exceptions::fthrow(
4156 THREAD_AND_LOCATION,
4157 vmSymbols::java_lang_IllegalAccessError(),
4158 "superinterface check failed: %s",
4159 msg);
4160 return;
4161 }
4162 }
4163 }
4164 }
4165
4166
4167 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4168 assert(this_klass != nullptr, "invariant");
4169 const Array<Method*>* const methods = this_klass->methods();
4170 const int num_methods = methods->length();
4171
4172 // go thru each method and check if it overrides a final method
4173 for (int index = 0; index < num_methods; index++) {
4174 const Method* const m = methods->at(index);
4175
4176 // skip private, static, and <init> methods
4177 if ((!m->is_private() && !m->is_static()) &&
4178 (m->name() != vmSymbols::object_initializer_name())) {
4179
4180 const Symbol* const name = m->name();
4181 const Symbol* const signature = m->signature();
4182 const InstanceKlass* k = this_klass->java_super();
4183 const Method* super_m = nullptr;
4184 while (k != nullptr) {
4185 // skip supers that don't have final methods.
4186 if (k->has_final_method()) {
4187 // lookup a matching method in the super class hierarchy
4188 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4189 if (super_m == nullptr) {
4190 break; // didn't find any match; get out
4191 }
4192
4193 if (super_m->is_final() && !super_m->is_static() &&
4194 !super_m->access_flags().is_private()) {
4195 // matching method in super is final, and not static or private
4196 bool can_access = Reflection::verify_member_access(this_klass,
4197 super_m->method_holder(),
4198 super_m->method_holder(),
4199 super_m->access_flags(),
4200 false, false, CHECK);
4201 if (can_access) {
4202 // this class can access super final method and therefore override
4203 ResourceMark rm(THREAD);
4204 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4205 err_msg("class %s overrides final method %s.%s%s",
4206 this_klass->external_name(),
4207 super_m->method_holder()->external_name(),
4208 name->as_C_string(),
4209 signature->as_C_string()));
4210 }
4211 }
4212
4213 // continue to look from super_m's holder's super.
4214 k = super_m->method_holder()->java_super();
4215 continue;
4216 }
4217
4218 k = k->java_super();
4219 }
4220 }
4221 }
4222 }
4223
4224
4225 // assumes that this_klass is an interface
4226 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4227 assert(this_klass != nullptr, "invariant");
4228 assert(this_klass->is_interface(), "not an interface");
4229 const Array<Method*>* methods = this_klass->methods();
4230 const int num_methods = methods->length();
4231
4232 for (int index = 0; index < num_methods; index++) {
4233 const Method* const m = methods->at(index);
4234 // if m is static and not the init method, throw a verify error
4235 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4236 ResourceMark rm(THREAD);
4237
4238 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4239 Exceptions::fthrow(
4240 THREAD_AND_LOCATION,
4241 vmSymbols::java_lang_VerifyError(),
4242 "Illegal static method %s in interface %s",
4243 m->name()->as_C_string(),
4244 this_klass->external_name()
4245 );
4246 return;
4247 }
4248 }
4249 }
4250
4251 // utility methods for format checking
4252
4253 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4254 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4255 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4256 if (is_module) {
4257 ResourceMark rm(THREAD);
4258 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4259 Exceptions::fthrow(
4260 THREAD_AND_LOCATION,
4261 vmSymbols::java_lang_NoClassDefFoundError(),
4262 "%s is not a class because access_flag ACC_MODULE is set",
4263 _class_name->as_C_string());
4264 return;
4265 }
4266
4267 if (!_need_verify) { return; }
4268
4269 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4270 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4271 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4272 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4273 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4274 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4275 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4276
4277 if ((is_abstract && is_final) ||
4278 (is_interface && !is_abstract) ||
4279 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4280 (!is_interface && major_gte_1_5 && is_annotation)) {
4281 ResourceMark rm(THREAD);
4282 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4283 Exceptions::fthrow(
4284 THREAD_AND_LOCATION,
4285 vmSymbols::java_lang_ClassFormatError(),
4286 "Illegal class modifiers in class %s: 0x%X",
4287 _class_name->as_C_string(), flags
4288 );
4289 return;
4290 }
4291 }
4292
4293 static bool has_illegal_visibility(jint flags) {
4294 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4295 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4296 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4297
4298 return ((is_public && is_protected) ||
4299 (is_public && is_private) ||
4300 (is_protected && is_private));
4301 }
4302
4303 // A legal major_version.minor_version must be one of the following:
4304 //
4305 // Major_version >= 45 and major_version < 56, any minor_version.
4306 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4307 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4308 //
4309 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4310 ResourceMark rm(THREAD);
4311 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4312 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4313 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4314 class_name, major, minor, THREAD);
4315 return;
4316 }
4317
4318 if (major > max_version) {
4319 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4320 Exceptions::fthrow(
4321 THREAD_AND_LOCATION,
4322 vmSymbols::java_lang_UnsupportedClassVersionError(),
4323 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4324 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4325 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4326 return;
4327 }
4328
4329 if (major < JAVA_12_VERSION || minor == 0) {
4330 return;
4331 }
4332
4333 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4334 if (major != max_version) {
4335 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4336 Exceptions::fthrow(
4337 THREAD_AND_LOCATION,
4338 vmSymbols::java_lang_UnsupportedClassVersionError(),
4339 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4340 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4341 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4342 return;
4343 }
4344
4345 if (!Arguments::enable_preview()) {
4346 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4347 class_name, major, minor, THREAD);
4348 return;
4349 }
4350
4351 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4352 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4353 class_name, major, minor, THREAD);
4354 }
4355 }
4356
4357 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4358 bool is_interface,
4359 TRAPS) const {
4360 if (!_need_verify) { return; }
4361
4362 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4363 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4364 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4365 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4366 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4367 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4368 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4369 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4370 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4371
4372 bool is_illegal = false;
4373
4374 if (is_interface) {
4375 if (!is_public || !is_static || !is_final || is_private ||
4376 is_protected || is_volatile || is_transient ||
4377 (major_gte_1_5 && is_enum)) {
4378 is_illegal = true;
4379 }
4380 } else { // not interface
4381 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4382 is_illegal = true;
4383 }
4384 }
4385
4386 if (is_illegal) {
4387 ResourceMark rm(THREAD);
4388 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4389 Exceptions::fthrow(
4390 THREAD_AND_LOCATION,
4391 vmSymbols::java_lang_ClassFormatError(),
4392 "Illegal field modifiers in class %s: 0x%X",
4393 _class_name->as_C_string(), flags);
4394 return;
4395 }
4396 }
4397
4398 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4399 bool is_interface,
4400 const Symbol* name,
4401 TRAPS) const {
4402 if (!_need_verify) { return; }
4403
4404 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4405 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4406 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4407 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4408 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4409 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4410 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4411 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4412 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4413 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4414 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4415 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4416 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4417 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4418
4419 bool is_illegal = false;
4420
4421 if (is_interface) {
4422 if (major_gte_8) {
4423 // Class file version is JAVA_8_VERSION or later Methods of
4424 // interfaces may set any of the flags except ACC_PROTECTED,
4425 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4426 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4427 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4428 (is_native || is_protected || is_final || is_synchronized) ||
4429 // If a specific method of a class or interface has its
4430 // ACC_ABSTRACT flag set, it must not have any of its
4431 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4432 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4433 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4434 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4435 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4436 is_illegal = true;
4437 }
4438 } else if (major_gte_1_5) {
4439 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4440 if (!is_public || is_private || is_protected || is_static || is_final ||
4441 is_synchronized || is_native || !is_abstract || is_strict) {
4442 is_illegal = true;
4443 }
4444 } else {
4445 // Class file version is pre-JAVA_1_5_VERSION
4446 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4447 is_illegal = true;
4448 }
4449 }
4450 } else { // not interface
4451 if (has_illegal_visibility(flags)) {
4452 is_illegal = true;
4453 } else {
4454 if (is_initializer) {
4455 if (is_static || is_final || is_synchronized || is_native ||
4456 is_abstract || (major_gte_1_5 && is_bridge)) {
4457 is_illegal = true;
4458 }
4459 } else { // not initializer
4460 if (is_abstract) {
4461 if ((is_final || is_native || is_private || is_static ||
4462 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4463 is_illegal = true;
4464 }
4465 }
4466 }
4467 }
4468 }
4469
4470 if (is_illegal) {
4471 ResourceMark rm(THREAD);
4472 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4473 Exceptions::fthrow(
4474 THREAD_AND_LOCATION,
4475 vmSymbols::java_lang_ClassFormatError(),
4476 "Method %s in class %s has illegal modifiers: 0x%X",
4477 name->as_C_string(), _class_name->as_C_string(), flags);
4478 return;
4479 }
4480 }
4481
4482 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4483 int length,
4484 TRAPS) const {
4485 assert(_need_verify, "only called when _need_verify is true");
4486 // Note: 0 <= length < 64K, as it comes from a u2 entry in the CP.
4487 if (!UTF8::is_legal_utf8(buffer, static_cast<size_t>(length), _major_version <= 47)) {
4488 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4489 }
4490 }
4491
4492 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4493 // In class names, '/' separates unqualified names. This is verified in this function also.
4494 // Method names also may not contain the characters '<' or '>', unless <init>
4495 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4496 // method. Because these names have been checked as special cases before
4497 // calling this method in verify_legal_method_name.
4498 //
4499 // This method is also called from the modular system APIs in modules.cpp
4500 // to verify the validity of module and package names.
4501 bool ClassFileParser::verify_unqualified_name(const char* name,
4502 unsigned int length,
4503 int type) {
4504 if (length == 0) return false; // Must have at least one char.
4505 for (const char* p = name; p != name + length; p++) {
4506 switch(*p) {
4507 case JVM_SIGNATURE_DOT:
4508 case JVM_SIGNATURE_ENDCLASS:
4509 case JVM_SIGNATURE_ARRAY:
4510 // do not permit '.', ';', or '['
4511 return false;
4512 case JVM_SIGNATURE_SLASH:
4513 // check for '//' or leading or trailing '/' which are not legal
4514 // unqualified name must not be empty
4515 if (type == ClassFileParser::LegalClass) {
4516 if (p == name || p+1 >= name+length ||
4517 *(p+1) == JVM_SIGNATURE_SLASH) {
4518 return false;
4519 }
4520 } else {
4521 return false; // do not permit '/' unless it's class name
4522 }
4523 break;
4524 case JVM_SIGNATURE_SPECIAL:
4525 case JVM_SIGNATURE_ENDSPECIAL:
4526 // do not permit '<' or '>' in method names
4527 if (type == ClassFileParser::LegalMethod) {
4528 return false;
4529 }
4530 }
4531 }
4532 return true;
4533 }
4534
4535 // Take pointer to a UTF8 byte string (not NUL-terminated).
4536 // Skip over the longest part of the string that could
4537 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
4538 // Return a pointer to just past the fieldname.
4539 // Return null if no fieldname at all was found, or in the case of slash_ok
4540 // being true, we saw consecutive slashes (meaning we were looking for a
4541 // qualified path but found something that was badly-formed).
4542 static const char* skip_over_field_name(const char* const name,
4543 bool slash_ok,
4544 unsigned int length) {
4545 const char* p;
4546 jboolean last_is_slash = false;
4547 jboolean not_first_ch = false;
4548
4549 for (p = name; p != name + length; not_first_ch = true) {
4550 const char* old_p = p;
4551 jchar ch = *p;
4552 if (ch < 128) {
4553 p++;
4554 // quick check for ascii
4555 if ((ch >= 'a' && ch <= 'z') ||
4556 (ch >= 'A' && ch <= 'Z') ||
4557 (ch == '_' || ch == '$') ||
4558 (not_first_ch && ch >= '0' && ch <= '9')) {
4559 last_is_slash = false;
4560 continue;
4561 }
4562 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
4563 if (last_is_slash) {
4564 return nullptr; // Don't permit consecutive slashes
4565 }
4566 last_is_slash = true;
4567 continue;
4568 }
4569 }
4570 else {
4571 jint unicode_ch;
4572 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4573 p = tmp_p;
4574 last_is_slash = false;
4575 // Check if ch is Java identifier start or is Java identifier part
4576 // 4672820: call java.lang.Character methods directly without generating separate tables.
4577 EXCEPTION_MARK;
4578 // return value
4579 JavaValue result(T_BOOLEAN);
4580 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
4581 JavaCallArguments args;
4582 args.push_int(unicode_ch);
4583
4584 if (not_first_ch) {
4585 // public static boolean isJavaIdentifierPart(char ch);
4586 JavaCalls::call_static(&result,
4587 vmClasses::Character_klass(),
4588 vmSymbols::isJavaIdentifierPart_name(),
4589 vmSymbols::int_bool_signature(),
4590 &args,
4591 THREAD);
4592 } else {
4593 // public static boolean isJavaIdentifierStart(char ch);
4594 JavaCalls::call_static(&result,
4595 vmClasses::Character_klass(),
4596 vmSymbols::isJavaIdentifierStart_name(),
4597 vmSymbols::int_bool_signature(),
4598 &args,
4599 THREAD);
4600 }
4601 if (HAS_PENDING_EXCEPTION) {
4602 CLEAR_PENDING_EXCEPTION;
4603 return nullptr;
4604 }
4605 if(result.get_jboolean()) {
4606 continue;
4607 }
4608 }
4609 return (not_first_ch) ? old_p : nullptr;
4610 }
4611 return (not_first_ch && !last_is_slash) ? p : nullptr;
4612 }
4613
4614 // Take pointer to a UTF8 byte string (not NUL-terminated).
4615 // Skip over the longest part of the string that could
4616 // be taken as a field signature. Allow "void" if void_ok.
4617 // Return a pointer to just past the signature.
4618 // Return null if no legal signature is found.
4619 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4620 bool void_ok,
4621 unsigned int length,
4622 TRAPS) const {
4623 unsigned int array_dim = 0;
4624 while (length > 0) {
4625 switch (signature[0]) {
4626 case JVM_SIGNATURE_VOID: if (!void_ok) { return nullptr; }
4627 case JVM_SIGNATURE_BOOLEAN:
4628 case JVM_SIGNATURE_BYTE:
4629 case JVM_SIGNATURE_CHAR:
4630 case JVM_SIGNATURE_SHORT:
4631 case JVM_SIGNATURE_INT:
4632 case JVM_SIGNATURE_FLOAT:
4633 case JVM_SIGNATURE_LONG:
4634 case JVM_SIGNATURE_DOUBLE:
4635 return signature + 1;
4636 case JVM_SIGNATURE_CLASS: {
4637 if (_major_version < JAVA_1_5_VERSION) {
4638 // Skip over the class name if one is there
4639 const char* const p = skip_over_field_name(signature + 1, true, --length);
4640
4641 // The next character better be a semicolon
4642 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
4643 return p + 1;
4644 }
4645 }
4646 else {
4647 // Skip leading 'L' and ignore first appearance of ';'
4648 signature++;
4649 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4650 // Format check signature
4651 if (c != nullptr) {
4652 int newlen = pointer_delta_as_int(c, (char*) signature);
4653 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4654 if (!legal) {
4655 classfile_parse_error("Class name is empty or contains illegal character "
4656 "in descriptor in class file %s",
4657 THREAD);
4658 return nullptr;
4659 }
4660 return signature + newlen + 1;
4661 }
4662 }
4663 return nullptr;
4664 }
4665 case JVM_SIGNATURE_ARRAY:
4666 array_dim++;
4667 if (array_dim > 255) {
4668 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4669 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
4670 return nullptr;
4671 }
4672 // The rest of what's there better be a legal signature
4673 signature++;
4674 length--;
4675 void_ok = false;
4676 break;
4677 default:
4678 return nullptr;
4679 }
4680 }
4681 return nullptr;
4682 }
4683
4684 // Checks if name is a legal class name.
4685 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4686 if (!_need_verify) { return; }
4687
4688 assert(name->refcount() > 0, "symbol must be kept alive");
4689 char* bytes = (char*)name->bytes();
4690 unsigned int length = name->utf8_length();
4691 bool legal = false;
4692
4693 if (length > 0) {
4694 const char* p;
4695 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4696 p = skip_over_field_signature(bytes, false, length, CHECK);
4697 legal = (p != nullptr) && ((p - bytes) == (int)length);
4698 } else if (_major_version < JAVA_1_5_VERSION) {
4699 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4700 p = skip_over_field_name(bytes, true, length);
4701 legal = (p != nullptr) && ((p - bytes) == (int)length);
4702 }
4703 } else {
4704 // 4900761: relax the constraints based on JSR202 spec
4705 // Class names may be drawn from the entire Unicode character set.
4706 // Identifiers between '/' must be unqualified names.
4707 // The utf8 string has been verified when parsing cpool entries.
4708 legal = verify_unqualified_name(bytes, length, LegalClass);
4709 }
4710 }
4711 if (!legal) {
4712 ResourceMark rm(THREAD);
4713 assert(_class_name != nullptr, "invariant");
4714 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4715 Exceptions::fthrow(
4716 THREAD_AND_LOCATION,
4717 vmSymbols::java_lang_ClassFormatError(),
4718 "Illegal class name \"%.*s\" in class file %s", length, bytes,
4719 _class_name->as_C_string()
4720 );
4721 return;
4722 }
4723 }
4724
4725 // Checks if name is a legal field name.
4726 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4727 if (!_need_verify) { return; }
4728
4729 char* bytes = (char*)name->bytes();
4730 unsigned int length = name->utf8_length();
4731 bool legal = false;
4732
4733 if (length > 0) {
4734 if (_major_version < JAVA_1_5_VERSION) {
4735 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4736 const char* p = skip_over_field_name(bytes, false, length);
4737 legal = (p != nullptr) && ((p - bytes) == (int)length);
4738 }
4739 } else {
4740 // 4881221: relax the constraints based on JSR202 spec
4741 legal = verify_unqualified_name(bytes, length, LegalField);
4742 }
4743 }
4744
4745 if (!legal) {
4746 ResourceMark rm(THREAD);
4747 assert(_class_name != nullptr, "invariant");
4748 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4749 Exceptions::fthrow(
4750 THREAD_AND_LOCATION,
4751 vmSymbols::java_lang_ClassFormatError(),
4752 "Illegal field name \"%.*s\" in class %s", length, bytes,
4753 _class_name->as_C_string()
4754 );
4755 return;
4756 }
4757 }
4758
4759 // Checks if name is a legal method name.
4760 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4761 if (!_need_verify) { return; }
4762
4763 assert(name != nullptr, "method name is null");
4764 char* bytes = (char*)name->bytes();
4765 unsigned int length = name->utf8_length();
4766 bool legal = false;
4767
4768 if (length > 0) {
4769 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
4770 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4771 legal = true;
4772 }
4773 } else if (_major_version < JAVA_1_5_VERSION) {
4774 const char* p;
4775 p = skip_over_field_name(bytes, false, length);
4776 legal = (p != nullptr) && ((p - bytes) == (int)length);
4777 } else {
4778 // 4881221: relax the constraints based on JSR202 spec
4779 legal = verify_unqualified_name(bytes, length, LegalMethod);
4780 }
4781 }
4782
4783 if (!legal) {
4784 ResourceMark rm(THREAD);
4785 assert(_class_name != nullptr, "invariant");
4786 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4787 Exceptions::fthrow(
4788 THREAD_AND_LOCATION,
4789 vmSymbols::java_lang_ClassFormatError(),
4790 "Illegal method name \"%.*s\" in class %s", length, bytes,
4791 _class_name->as_C_string()
4792 );
4793 return;
4794 }
4795 }
4796
4797
4798 // Checks if signature is a legal field signature.
4799 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
4800 const Symbol* signature,
4801 TRAPS) const {
4802 if (!_need_verify) { return; }
4803
4804 const char* const bytes = (const char*)signature->bytes();
4805 const unsigned int length = signature->utf8_length();
4806 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
4807
4808 if (p == nullptr || (p - bytes) != (int)length) {
4809 throwIllegalSignature("Field", name, signature, CHECK);
4810 }
4811 }
4812
4813 // Check that the signature is compatible with the method name. For example,
4814 // check that <init> has a void signature.
4815 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
4816 const Symbol* signature,
4817 TRAPS) const {
4818 if (!_need_verify) {
4819 return;
4820 }
4821
4822 // Class initializers cannot have args for class format version >= 51.
4823 if (name == vmSymbols::class_initializer_name() &&
4824 signature != vmSymbols::void_method_signature() &&
4825 _major_version >= JAVA_7_VERSION) {
4826 throwIllegalSignature("Method", name, signature, THREAD);
4827 return;
4828 }
4829
4830 int sig_length = signature->utf8_length();
4831 if (name->utf8_length() > 0 &&
4832 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
4833 sig_length > 0 &&
4834 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
4835 throwIllegalSignature("Method", name, signature, THREAD);
4836 }
4837 }
4838
4839 // Checks if signature is a legal method signature.
4840 // Returns number of parameters
4841 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
4842 const Symbol* signature,
4843 TRAPS) const {
4844 if (!_need_verify) {
4845 // make sure caller's args_size will be less than 0 even for non-static
4846 // method so it will be recomputed in compute_size_of_parameters().
4847 return -2;
4848 }
4849
4850 unsigned int args_size = 0;
4851 const char* p = (const char*)signature->bytes();
4852 unsigned int length = signature->utf8_length();
4853 const char* nextp;
4854
4855 // The first character must be a '('
4856 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4857 length--;
4858 // Skip over legal field signatures
4859 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4860 while ((length > 0) && (nextp != nullptr)) {
4861 args_size++;
4862 if (p[0] == 'J' || p[0] == 'D') {
4863 args_size++;
4864 }
4865 length -= pointer_delta_as_int(nextp, p);
4866 p = nextp;
4867 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4868 }
4869 // The first non-signature thing better be a ')'
4870 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4871 length--;
4872 // Now we better just have a return value
4873 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4874 if (nextp && ((int)length == (nextp - p))) {
4875 return args_size;
4876 }
4877 }
4878 }
4879 // Report error
4880 throwIllegalSignature("Method", name, signature, THREAD);
4881 return 0;
4882 }
4883
4884 int ClassFileParser::static_field_size() const {
4885 assert(_field_info != nullptr, "invariant");
4886 return _field_info->_static_field_size;
4887 }
4888
4889 int ClassFileParser::total_oop_map_count() const {
4890 assert(_field_info != nullptr, "invariant");
4891 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
4892 }
4893
4894 jint ClassFileParser::layout_size() const {
4895 assert(_field_info != nullptr, "invariant");
4896 return _field_info->_instance_size;
4897 }
4898
4899 static void check_methods_for_intrinsics(const InstanceKlass* ik,
4900 const Array<Method*>* methods) {
4901 assert(ik != nullptr, "invariant");
4902 assert(methods != nullptr, "invariant");
4903
4904 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4905 // (We used to do this lazily, but now we query it in Rewriter,
4906 // which is eagerly done for every method, so we might as well do it now,
4907 // when everything is fresh in memory.)
4908 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
4909
4910 if (klass_id != vmSymbolID::NO_SID) {
4911 for (int j = 0; j < methods->length(); ++j) {
4912 Method* method = methods->at(j);
4913 method->init_intrinsic_id(klass_id);
4914
4915 if (CheckIntrinsics) {
4916 // Check if an intrinsic is defined for method 'method',
4917 // but the method is not annotated with @IntrinsicCandidate.
4918 if (method->intrinsic_id() != vmIntrinsics::_none &&
4919 !method->intrinsic_candidate()) {
4920 tty->print("Compiler intrinsic is defined for method [%s], "
4921 "but the method is not annotated with @IntrinsicCandidate.%s",
4922 method->name_and_sig_as_C_string(),
4923 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
4924 );
4925 tty->cr();
4926 DEBUG_ONLY(vm_exit(1));
4927 }
4928 // Check is the method 'method' is annotated with @IntrinsicCandidate,
4929 // but there is no intrinsic available for it.
4930 if (method->intrinsic_candidate() &&
4931 method->intrinsic_id() == vmIntrinsics::_none) {
4932 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
4933 "but no compiler intrinsic is defined for the method.%s",
4934 method->name_and_sig_as_C_string(),
4935 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4936 );
4937 tty->cr();
4938 DEBUG_ONLY(vm_exit(1));
4939 }
4940 }
4941 } // end for
4942
4943 #ifdef ASSERT
4944 if (CheckIntrinsics) {
4945 // Check for orphan methods in the current class. A method m
4946 // of a class C is orphan if an intrinsic is defined for method m,
4947 // but class C does not declare m.
4948 // The check is potentially expensive, therefore it is available
4949 // only in debug builds.
4950
4951 for (auto id : EnumRange<vmIntrinsicID>{}) {
4952 if (vmIntrinsics::_compiledLambdaForm == id) {
4953 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
4954 // generated for the JVM from a LambdaForm and therefore no method
4955 // is defined for it.
4956 continue;
4957 }
4958 if (vmIntrinsics::_blackhole == id) {
4959 // The _blackhole intrinsic is a special marker. No explicit method
4960 // is defined for it.
4961 continue;
4962 }
4963
4964 if (vmIntrinsics::class_for(id) == klass_id) {
4965 // Check if the current class contains a method with the same
4966 // name, flags, signature.
4967 bool match = false;
4968 for (int j = 0; j < methods->length(); ++j) {
4969 const Method* method = methods->at(j);
4970 if (method->intrinsic_id() == id) {
4971 match = true;
4972 break;
4973 }
4974 }
4975
4976 if (!match) {
4977 char buf[1000];
4978 tty->print("Compiler intrinsic is defined for method [%s], "
4979 "but the method is not available in class [%s].%s",
4980 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
4981 ik->name()->as_C_string(),
4982 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4983 );
4984 tty->cr();
4985 DEBUG_ONLY(vm_exit(1));
4986 }
4987 }
4988 } // end for
4989 } // CheckIntrinsics
4990 #endif // ASSERT
4991 }
4992 }
4993
4994 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
4995 const ClassInstanceInfo& cl_inst_info,
4996 TRAPS) {
4997 if (_klass != nullptr) {
4998 return _klass;
4999 }
5000
5001 InstanceKlass* const ik =
5002 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5003
5004 if (is_hidden()) {
5005 mangle_hidden_class_name(ik);
5006 }
5007
5008 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5009
5010 assert(_klass == ik, "invariant");
5011
5012 return ik;
5013 }
5014
5015 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5016 bool changed_by_loadhook,
5017 const ClassInstanceInfo& cl_inst_info,
5018 TRAPS) {
5019 assert(ik != nullptr, "invariant");
5020
5021 // Set name and CLD before adding to CLD
5022 ik->set_class_loader_data(_loader_data);
5023 ik->set_class_loader_type();
5024 ik->set_name(_class_name);
5025
5026 // Add all classes to our internal class loader list here,
5027 // including classes in the bootstrap (null) class loader.
5028 const bool publicize = !is_internal();
5029
5030 _loader_data->add_class(ik, publicize);
5031
5032 set_klass_to_deallocate(ik);
5033
5034 assert(_field_info != nullptr, "invariant");
5035 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5036 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5037 "sanity");
5038
5039 assert(ik->is_instance_klass(), "sanity");
5040 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5041
5042 // Fill in information already parsed
5043 ik->set_should_verify_class(_need_verify);
5044
5045 // Not yet: supers are done below to support the new subtype-checking fields
5046 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5047 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5048 ik->set_static_oop_field_count(_static_oop_count);
5049
5050 // this transfers ownership of a lot of arrays from
5051 // the parser onto the InstanceKlass*
5052 apply_parsed_class_metadata(ik, _java_fields_count);
5053
5054 // can only set dynamic nest-host after static nest information is set
5055 if (cl_inst_info.dynamic_nest_host() != nullptr) {
5056 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5057 }
5058
5059 // note that is not safe to use the fields in the parser from this point on
5060 assert(nullptr == _cp, "invariant");
5061 assert(nullptr == _fieldinfo_stream, "invariant");
5062 assert(nullptr == _fieldinfo_search_table, "invariant");
5063 assert(nullptr == _fields_status, "invariant");
5064 assert(nullptr == _methods, "invariant");
5065 assert(nullptr == _inner_classes, "invariant");
5066 assert(nullptr == _nest_members, "invariant");
5067 assert(nullptr == _combined_annotations, "invariant");
5068 assert(nullptr == _record_components, "invariant");
5069 assert(nullptr == _permitted_subclasses, "invariant");
5070
5071 if (_has_localvariable_table) {
5072 ik->set_has_localvariable_table(true);
5073 }
5074
5075 if (_has_final_method) {
5076 ik->set_has_final_method();
5077 }
5078
5079 ik->copy_method_ordering(_method_ordering, CHECK);
5080 // The InstanceKlass::_methods_jmethod_ids cache
5081 // is managed on the assumption that the initial cache
5082 // size is equal to the number of methods in the class. If
5083 // that changes, then InstanceKlass::idnum_can_increment()
5084 // has to be changed accordingly.
5085 ik->set_initial_method_idnum(checked_cast<u2>(ik->methods()->length()));
5086
5087 ik->set_this_class_index(_this_class_index);
5088
5089 if (_is_hidden) {
5090 // _this_class_index is a CONSTANT_Class entry that refers to this
5091 // hidden class itself. If this class needs to refer to its own methods
5092 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5093 // _this_class_index. However, because this class is hidden (it's
5094 // not stored in SystemDictionary), _this_class_index cannot be resolved
5095 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5096 // Therefore, we must eagerly resolve _this_class_index now.
5097 ik->constants()->klass_at_put(_this_class_index, ik);
5098 }
5099
5100 ik->set_minor_version(_minor_version);
5101 ik->set_major_version(_major_version);
5102 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5103 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5104
5105 assert(!_is_hidden || ik->is_hidden(), "must be set already");
5106
5107 // Set PackageEntry for this_klass
5108 oop cl = ik->class_loader();
5109 Handle clh = Handle(THREAD, cl);
5110 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5111 ik->set_package(cld, nullptr, CHECK);
5112
5113 const Array<Method*>* const methods = ik->methods();
5114 assert(methods != nullptr, "invariant");
5115 const int methods_len = methods->length();
5116
5117 check_methods_for_intrinsics(ik, methods);
5118
5119 // Fill in field values obtained by parse_classfile_attributes
5120 if (_parsed_annotations->has_any_annotations()) {
5121 _parsed_annotations->apply_to(ik);
5122 }
5123
5124 apply_parsed_class_attributes(ik);
5125
5126 // Miranda methods
5127 if ((_num_miranda_methods > 0) ||
5128 // if this class introduced new miranda methods or
5129 (_super_klass != nullptr && _super_klass->has_miranda_methods())
5130 // super class exists and this class inherited miranda methods
5131 ) {
5132 ik->set_has_miranda_methods(); // then set a flag
5133 }
5134
5135 // Fill in information needed to compute superclasses.
5136 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5137 ik->set_transitive_interfaces(_transitive_interfaces);
5138 ik->set_local_interfaces(_local_interfaces);
5139 _transitive_interfaces = nullptr;
5140 _local_interfaces = nullptr;
5141
5142 // Initialize itable offset tables
5143 klassItable::setup_itable_offset_table(ik);
5144
5145 // Compute transitive closure of interfaces this class implements
5146 // Do final class setup
5147 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5148 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5149 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5150 }
5151
5152 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5153 ( _super_klass != nullptr && _super_klass->has_contended_annotations())) {
5154 ik->set_has_contended_annotations(true);
5155 }
5156
5157 // Fill in has_finalizer and layout_helper
5158 set_precomputed_flags(ik);
5159
5160 // check if this class can access its super class
5161 check_super_class_access(ik, CHECK);
5162
5163 // check if this class can access its superinterfaces
5164 check_super_interface_access(ik, CHECK);
5165
5166 // check if this class overrides any final method
5167 check_final_method_override(ik, CHECK);
5168
5169 // reject static interface methods prior to Java 8
5170 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5171 check_illegal_static_method(ik, CHECK);
5172 }
5173
5174 // Obtain this_klass' module entry
5175 ModuleEntry* module_entry = ik->module();
5176 assert(module_entry != nullptr, "module_entry should always be set");
5177
5178 // Obtain java.lang.Module
5179 Handle module_handle(THREAD, module_entry->module_oop());
5180
5181 // Allocate mirror and initialize static fields
5182 java_lang_Class::create_mirror(ik,
5183 Handle(THREAD, _loader_data->class_loader()),
5184 module_handle,
5185 _protection_domain,
5186 cl_inst_info.class_data(),
5187 CHECK);
5188
5189 assert(_all_mirandas != nullptr, "invariant");
5190
5191 // Generate any default methods - default methods are public interface methods
5192 // that have a default implementation. This is new with Java 8.
5193 if (_has_nonstatic_concrete_methods) {
5194 DefaultMethods::generate_default_methods(ik,
5195 _all_mirandas,
5196 CHECK);
5197 }
5198
5199 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5200 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5201 !module_entry->has_default_read_edges()) {
5202 if (!module_entry->set_has_default_read_edges()) {
5203 // We won a potential race
5204 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5205 }
5206 }
5207
5208 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5209
5210 if (!is_internal()) {
5211 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5212
5213 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5214 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5215 log_is_enabled(Info, class, preview)) {
5216 ResourceMark rm;
5217 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5218 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5219 }
5220
5221 if (log_is_enabled(Debug, class, resolve)) {
5222 ResourceMark rm;
5223 // print out the superclass.
5224 const char * from = ik->external_name();
5225 if (ik->java_super() != nullptr) {
5226 log_debug(class, resolve)("%s %s (super)",
5227 from,
5228 ik->java_super()->external_name());
5229 }
5230 // print out each of the interface classes referred to by this class.
5231 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5232 if (local_interfaces != nullptr) {
5233 const int length = local_interfaces->length();
5234 for (int i = 0; i < length; i++) {
5235 const InstanceKlass* const k = local_interfaces->at(i);
5236 const char * to = k->external_name();
5237 log_debug(class, resolve)("%s %s (interface)", from, to);
5238 }
5239 }
5240 }
5241 }
5242
5243 JFR_ONLY(INIT_ID(ik);)
5244
5245 // If we reach here, all is well.
5246 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5247 // in order for it to not be destroyed in the ClassFileParser destructor.
5248 set_klass_to_deallocate(nullptr);
5249
5250 // it's official
5251 set_klass(ik);
5252
5253 DEBUG_ONLY(ik->verify();)
5254 }
5255
5256 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5257 // Decrement the refcount in the old name, since we're clobbering it.
5258 _class_name->decrement_refcount();
5259
5260 _class_name = new_class_name;
5261 // Increment the refcount of the new name.
5262 // Now the ClassFileParser owns this name and will decrement in
5263 // the destructor.
5264 _class_name->increment_refcount();
5265 }
5266
5267 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5268 Symbol* name,
5269 ClassLoaderData* loader_data,
5270 const ClassLoadInfo* cl_info,
5271 Publicity pub_level,
5272 TRAPS) :
5273 _stream(stream),
5274 _class_name(nullptr),
5275 _loader_data(loader_data),
5276 _is_hidden(cl_info->is_hidden()),
5277 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5278 _orig_cp_size(0),
5279 _static_oop_count(0),
5280 _super_klass(),
5281 _cp(nullptr),
5282 _fieldinfo_stream(nullptr),
5283 _fieldinfo_search_table(nullptr),
5284 _fields_status(nullptr),
5285 _methods(nullptr),
5286 _inner_classes(nullptr),
5287 _nest_members(nullptr),
5288 _nest_host(0),
5289 _permitted_subclasses(nullptr),
5290 _record_components(nullptr),
5291 _local_interfaces(nullptr),
5292 _transitive_interfaces(nullptr),
5293 _combined_annotations(nullptr),
5294 _class_annotations(nullptr),
5295 _class_type_annotations(nullptr),
5296 _fields_annotations(nullptr),
5297 _fields_type_annotations(nullptr),
5298 _klass(nullptr),
5299 _klass_to_deallocate(nullptr),
5300 _parsed_annotations(nullptr),
5301 _field_info(nullptr),
5302 _temp_field_info(nullptr),
5303 _method_ordering(nullptr),
5304 _all_mirandas(nullptr),
5305 _vtable_size(0),
5306 _itable_size(0),
5307 _num_miranda_methods(0),
5308 _protection_domain(cl_info->protection_domain()),
5309 _access_flags(),
5310 _pub_level(pub_level),
5311 _bad_constant_seen(0),
5312 _synthetic_flag(false),
5313 _sde_length(false),
5314 _sde_buffer(nullptr),
5315 _sourcefile_index(0),
5316 _generic_signature_index(0),
5317 _major_version(0),
5318 _minor_version(0),
5319 _this_class_index(0),
5320 _super_class_index(0),
5321 _itfs_len(0),
5322 _java_fields_count(0),
5323 _need_verify(false),
5324 _has_nonstatic_concrete_methods(false),
5325 _declares_nonstatic_concrete_methods(false),
5326 _has_localvariable_table(false),
5327 _has_final_method(false),
5328 _has_contended_fields(false),
5329 _has_finalizer(false),
5330 _has_empty_finalizer(false),
5331 _max_bootstrap_specifier_index(-1) {
5332
5333 _class_name = name != nullptr ? name : vmSymbols::unknown_class_name();
5334 _class_name->increment_refcount();
5335
5336 assert(_loader_data != nullptr, "invariant");
5337 assert(stream != nullptr, "invariant");
5338 assert(_stream != nullptr, "invariant");
5339 assert(_stream->buffer() == _stream->current(), "invariant");
5340 assert(_class_name != nullptr, "invariant");
5341 assert(0 == _access_flags.as_unsigned_short(), "invariant");
5342
5343 // Figure out whether we can skip format checking (matching classic VM behavior)
5344 // Always verify CFLH bytes from the user agents.
5345 _need_verify = stream->from_class_file_load_hook() ? true : Verifier::should_verify_for(_loader_data->class_loader());
5346
5347 // synch back verification state to stream to check for truncation.
5348 stream->set_need_verify(_need_verify);
5349
5350 parse_stream(stream, CHECK);
5351
5352 post_process_parsed_stream(stream, _cp, CHECK);
5353 }
5354
5355 void ClassFileParser::clear_class_metadata() {
5356 // metadata created before the instance klass is created. Must be
5357 // deallocated if classfile parsing returns an error.
5358 _cp = nullptr;
5359 _fieldinfo_stream = nullptr;
5360 _fieldinfo_search_table = nullptr;
5361 _fields_status = nullptr;
5362 _methods = nullptr;
5363 _inner_classes = nullptr;
5364 _nest_members = nullptr;
5365 _permitted_subclasses = nullptr;
5366 _combined_annotations = nullptr;
5367 _class_annotations = _class_type_annotations = nullptr;
5368 _fields_annotations = _fields_type_annotations = nullptr;
5369 _record_components = nullptr;
5370 }
5371
5372 // Destructor to clean up
5373 ClassFileParser::~ClassFileParser() {
5374 _class_name->decrement_refcount();
5375
5376 if (_cp != nullptr) {
5377 MetadataFactory::free_metadata(_loader_data, _cp);
5378 }
5379
5380 if (_fieldinfo_stream != nullptr) {
5381 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_stream);
5382 }
5383 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_search_table);
5384
5385 if (_fields_status != nullptr) {
5386 MetadataFactory::free_array<FieldStatus>(_loader_data, _fields_status);
5387 }
5388
5389 if (_methods != nullptr) {
5390 // Free methods
5391 InstanceKlass::deallocate_methods(_loader_data, _methods);
5392 }
5393
5394 // beware of the Universe::empty_blah_array!!
5395 if (_inner_classes != nullptr && _inner_classes != Universe::the_empty_short_array()) {
5396 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5397 }
5398
5399 if (_nest_members != nullptr && _nest_members != Universe::the_empty_short_array()) {
5400 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5401 }
5402
5403 if (_record_components != nullptr) {
5404 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5405 }
5406
5407 if (_permitted_subclasses != nullptr && _permitted_subclasses != Universe::the_empty_short_array()) {
5408 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5409 }
5410
5411 // Free interfaces
5412 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5413 _local_interfaces, _transitive_interfaces);
5414
5415 if (_combined_annotations != nullptr) {
5416 // After all annotations arrays have been created, they are installed into the
5417 // Annotations object that will be assigned to the InstanceKlass being created.
5418
5419 // Deallocate the Annotations object and the installed annotations arrays.
5420 _combined_annotations->deallocate_contents(_loader_data);
5421
5422 // If the _combined_annotations pointer is non-null,
5423 // then the other annotations fields should have been cleared.
5424 assert(_class_annotations == nullptr, "Should have been cleared");
5425 assert(_class_type_annotations == nullptr, "Should have been cleared");
5426 assert(_fields_annotations == nullptr, "Should have been cleared");
5427 assert(_fields_type_annotations == nullptr, "Should have been cleared");
5428 } else {
5429 // If the annotations arrays were not installed into the Annotations object,
5430 // then they have to be deallocated explicitly.
5431 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5432 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5433 Annotations::free_contents(_loader_data, _fields_annotations);
5434 Annotations::free_contents(_loader_data, _fields_type_annotations);
5435 }
5436
5437 clear_class_metadata();
5438 _transitive_interfaces = nullptr;
5439 _local_interfaces = nullptr;
5440
5441 // deallocate the klass if already created. Don't directly deallocate, but add
5442 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5443 // at a safepoint.
5444 if (_klass_to_deallocate != nullptr) {
5445 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5446 }
5447 }
5448
5449 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5450 TRAPS) {
5451
5452 assert(stream != nullptr, "invariant");
5453 assert(_class_name != nullptr, "invariant");
5454
5455 // BEGIN STREAM PARSING
5456 stream->guarantee_more(8, CHECK); // magic, major, minor
5457 // Magic value
5458 const u4 magic = stream->get_u4_fast();
5459 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5460 "Incompatible magic value %u in class file %s",
5461 magic, CHECK);
5462
5463 // Version numbers
5464 _minor_version = stream->get_u2_fast();
5465 _major_version = stream->get_u2_fast();
5466
5467 // Check version numbers - we check this even with verifier off
5468 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5469
5470 stream->guarantee_more(3, CHECK); // length, first cp tag
5471 u2 cp_size = stream->get_u2_fast();
5472
5473 guarantee_property(
5474 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5475 cp_size, CHECK);
5476
5477 _orig_cp_size = cp_size;
5478 if (is_hidden()) { // Add a slot for hidden class name.
5479 cp_size++;
5480 }
5481
5482 _cp = ConstantPool::allocate(_loader_data,
5483 cp_size,
5484 CHECK);
5485
5486 ConstantPool* const cp = _cp;
5487
5488 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
5489
5490 assert(cp_size == (u2)cp->length(), "invariant");
5491
5492 // ACCESS FLAGS
5493 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5494
5495 // Access flags
5496 u2 flags;
5497 // JVM_ACC_MODULE is defined in JDK-9 and later.
5498 if (_major_version >= JAVA_9_VERSION) {
5499 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5500 } else {
5501 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5502 }
5503
5504 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5505 // Set abstract bit for old class files for backward compatibility
5506 flags |= JVM_ACC_ABSTRACT;
5507 }
5508
5509 verify_legal_class_modifiers(flags, CHECK);
5510
5511 short bad_constant = class_bad_constant_seen();
5512 if (bad_constant != 0) {
5513 // Do not throw CFE until after the access_flags are checked because if
5514 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5515 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5516 return;
5517 }
5518
5519 _access_flags.set_flags(flags);
5520
5521 // This class and superclass
5522 _this_class_index = stream->get_u2_fast();
5523 guarantee_property(
5524 valid_cp_range(_this_class_index, cp_size) &&
5525 cp->tag_at(_this_class_index).is_unresolved_klass(),
5526 "Invalid this class index %u in constant pool in class file %s",
5527 _this_class_index, CHECK);
5528
5529 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5530 assert(class_name_in_cp != nullptr, "class_name can't be null");
5531
5532 // Don't need to check whether this class name is legal or not.
5533 // It has been checked when constant pool is parsed.
5534 // However, make sure it is not an array type.
5535 if (_need_verify) {
5536 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
5537 "Bad class name in class file %s",
5538 CHECK);
5539 }
5540
5541 #ifdef ASSERT
5542 // Basic sanity checks
5543 if (_is_hidden) {
5544 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
5545 }
5546 #endif
5547
5548 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
5549
5550 if (_is_hidden) {
5551 assert(_class_name != nullptr, "Unexpected null _class_name");
5552 #ifdef ASSERT
5553 if (_need_verify) {
5554 verify_legal_class_name(_class_name, CHECK);
5555 }
5556 #endif
5557
5558 } else {
5559 // Check if name in class file matches given name
5560 if (_class_name != class_name_in_cp) {
5561 if (_class_name != vmSymbols::unknown_class_name()) {
5562 ResourceMark rm(THREAD);
5563 // Names are all known to be < 64k so we know this formatted message is not excessively large.
5564 Exceptions::fthrow(THREAD_AND_LOCATION,
5565 vmSymbols::java_lang_NoClassDefFoundError(),
5566 "%s (wrong name: %s)",
5567 _class_name->as_C_string(),
5568 class_name_in_cp->as_C_string()
5569 );
5570 return;
5571 } else {
5572 // The class name was not known by the caller so we set it from
5573 // the value in the CP.
5574 update_class_name(class_name_in_cp);
5575 }
5576 // else nothing to do: the expected class name matches what is in the CP
5577 }
5578 }
5579
5580 // Verification prevents us from creating names with dots in them, this
5581 // asserts that that's the case.
5582 assert(is_internal_format(_class_name), "external class name format used internally");
5583
5584 if (!is_internal()) {
5585 LogTarget(Debug, class, preorder) lt;
5586 if (lt.is_enabled()){
5587 ResourceMark rm(THREAD);
5588 LogStream ls(lt);
5589 ls.print("%s", _class_name->as_klass_external_name());
5590 if (stream->source() != nullptr) {
5591 ls.print(" source: %s", stream->source());
5592 }
5593 ls.cr();
5594 }
5595 }
5596
5597 // SUPERKLASS
5598 _super_class_index = stream->get_u2_fast();
5599 _super_klass = parse_super_class(cp,
5600 _super_class_index,
5601 _need_verify,
5602 CHECK);
5603
5604 // Interfaces
5605 _itfs_len = stream->get_u2_fast();
5606 parse_interfaces(stream,
5607 _itfs_len,
5608 cp,
5609 &_has_nonstatic_concrete_methods,
5610 CHECK);
5611
5612 assert(_local_interfaces != nullptr, "invariant");
5613
5614 // Fields (offsets are filled in later)
5615 parse_fields(stream,
5616 _access_flags.is_interface(),
5617 cp,
5618 cp_size,
5619 &_java_fields_count,
5620 CHECK);
5621
5622 assert(_temp_field_info != nullptr, "invariant");
5623
5624 // Methods
5625 parse_methods(stream,
5626 _access_flags.is_interface(),
5627 &_has_localvariable_table,
5628 &_has_final_method,
5629 &_declares_nonstatic_concrete_methods,
5630 CHECK);
5631
5632 assert(_methods != nullptr, "invariant");
5633
5634 if (_declares_nonstatic_concrete_methods) {
5635 _has_nonstatic_concrete_methods = true;
5636 }
5637
5638 // Additional attributes/annotations
5639 _parsed_annotations = new ClassAnnotationCollector();
5640 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5641
5642 assert(_inner_classes != nullptr, "invariant");
5643
5644 // Finalize the Annotations metadata object,
5645 // now that all annotation arrays have been created.
5646 create_combined_annotations(CHECK);
5647
5648 // Make sure this is the end of class file stream
5649 guarantee_property(stream->at_eos(),
5650 "Extra bytes at the end of class file %s",
5651 CHECK);
5652
5653 // all bytes in stream read and parsed
5654 }
5655
5656 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
5657 ResourceMark rm;
5658 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
5659 // use a '/' because that confuses finding the class's package. Also, can't
5660 // use an illegal char such as ';' because that causes serialization issues
5661 // and issues with hidden classes that create their own hidden classes.
5662 char addr_buf[20];
5663 if (CDSConfig::is_dumping_static_archive()) {
5664 // We want stable names for the archived hidden classes (only for static
5665 // archive for now). Spaces under default_SharedBaseAddress() will be
5666 // occupied by the archive at run time, so we know that no dynamically
5667 // loaded InstanceKlass will be placed under there.
5668 static volatile size_t counter = 0;
5669 Atomic::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
5670 size_t new_id = Atomic::add(&counter, (size_t)1);
5671 jio_snprintf(addr_buf, 20, "0x%zx", new_id);
5672 } else {
5673 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
5674 }
5675 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
5676 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
5677 jio_snprintf(new_name, new_name_len, "%s+%s",
5678 _class_name->as_C_string(), addr_buf);
5679 update_class_name(SymbolTable::new_symbol(new_name));
5680
5681 // Add a Utf8 entry containing the hidden name.
5682 assert(_class_name != nullptr, "Unexpected null _class_name");
5683 int hidden_index = _orig_cp_size; // this is an extra slot we added
5684 _cp->symbol_at_put(hidden_index, _class_name);
5685
5686 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
5687 // We have to update the resolved_klass_index and the name_index together
5688 // so extract the existing resolved_klass_index first.
5689 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
5690 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
5691 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
5692 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
5693 "Bad name_index");
5694 }
5695
5696 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5697 ConstantPool* cp,
5698 TRAPS) {
5699 assert(stream != nullptr, "invariant");
5700 assert(stream->at_eos(), "invariant");
5701 assert(cp != nullptr, "invariant");
5702 assert(_loader_data != nullptr, "invariant");
5703
5704 if (_class_name == vmSymbols::java_lang_Object()) {
5705 guarantee_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
5706 "java.lang.Object cannot implement an interface in class file %s",
5707 CHECK);
5708 }
5709 // We check super class after class file is parsed and format is checked
5710 if (_super_class_index > 0 && nullptr == _super_klass) {
5711 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5712 if (_access_flags.is_interface()) {
5713 // Before attempting to resolve the superclass, check for class format
5714 // errors not checked yet.
5715 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5716 "Interfaces must have java.lang.Object as superclass in class file %s",
5717 CHECK);
5718 }
5719 Handle loader(THREAD, _loader_data->class_loader());
5720 if (loader.is_null() && super_class_name == vmSymbols::java_lang_Object()) {
5721 _super_klass = vmClasses::Object_klass();
5722 } else {
5723 _super_klass = (const InstanceKlass*)
5724 SystemDictionary::resolve_super_or_fail(_class_name,
5725 super_class_name,
5726 loader,
5727 true,
5728 CHECK);
5729 }
5730 }
5731
5732 if (_super_klass != nullptr) {
5733 if (_super_klass->has_nonstatic_concrete_methods()) {
5734 _has_nonstatic_concrete_methods = true;
5735 }
5736
5737 if (_super_klass->is_interface()) {
5738 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
5739 return;
5740 }
5741 }
5742
5743 // Compute the transitive list of all unique interfaces implemented by this class
5744 _transitive_interfaces =
5745 compute_transitive_interfaces(_super_klass,
5746 _local_interfaces,
5747 _loader_data,
5748 CHECK);
5749
5750 assert(_transitive_interfaces != nullptr, "invariant");
5751
5752 // sort methods
5753 _method_ordering = sort_methods(_methods);
5754
5755 _all_mirandas = new GrowableArray<Method*>(20);
5756
5757 Handle loader(THREAD, _loader_data->class_loader());
5758 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5759 &_num_miranda_methods,
5760 _all_mirandas,
5761 _super_klass,
5762 _methods,
5763 _access_flags,
5764 _major_version,
5765 loader,
5766 _class_name,
5767 _local_interfaces);
5768
5769 // Size of Java itable (in words)
5770 _itable_size = _access_flags.is_interface() ? 0 :
5771 klassItable::compute_itable_size(_transitive_interfaces);
5772
5773 assert(_parsed_annotations != nullptr, "invariant");
5774
5775 _field_info = new FieldLayoutInfo();
5776 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, /*_fields*/ _temp_field_info,
5777 _parsed_annotations->is_contended(), _field_info);
5778 lb.build_layout();
5779
5780 int injected_fields_count = _temp_field_info->length() - _java_fields_count;
5781 _fieldinfo_stream =
5782 FieldInfoStream::create_FieldInfoStream(_temp_field_info, _java_fields_count,
5783 injected_fields_count, loader_data(), CHECK);
5784 _fieldinfo_search_table = FieldInfoStream::create_search_table(_cp, _fieldinfo_stream, _loader_data, CHECK);
5785 _fields_status =
5786 MetadataFactory::new_array<FieldStatus>(_loader_data, _temp_field_info->length(),
5787 FieldStatus(0), CHECK);
5788 }
5789
5790 void ClassFileParser::set_klass(InstanceKlass* klass) {
5791
5792 #ifdef ASSERT
5793 if (klass != nullptr) {
5794 assert(nullptr == _klass, "leaking?");
5795 }
5796 #endif
5797
5798 _klass = klass;
5799 }
5800
5801 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5802
5803 #ifdef ASSERT
5804 if (klass != nullptr) {
5805 assert(nullptr == _klass_to_deallocate, "leaking?");
5806 }
5807 #endif
5808
5809 _klass_to_deallocate = klass;
5810 }
5811
5812 // Caller responsible for ResourceMark
5813 // clone stream with rewound position
5814 const ClassFileStream* ClassFileParser::clone_stream() const {
5815 assert(_stream != nullptr, "invariant");
5816
5817 return _stream->clone();
5818 }
5819
5820 ReferenceType ClassFileParser::super_reference_type() const {
5821 return _super_klass == nullptr ? REF_NONE : _super_klass->reference_type();
5822 }
5823
5824 bool ClassFileParser::is_instance_ref_klass() const {
5825 // Only the subclasses of j.l.r.Reference are InstanceRefKlass.
5826 // j.l.r.Reference itself is InstanceKlass because InstanceRefKlass denotes a
5827 // klass requiring special treatment in ref-processing. The abstract
5828 // j.l.r.Reference cannot be instantiated so doesn't partake in
5829 // ref-processing.
5830 return is_java_lang_ref_Reference_subclass();
5831 }
5832
5833 bool ClassFileParser::is_java_lang_ref_Reference_subclass() const {
5834 if (_super_klass == nullptr) {
5835 return false;
5836 }
5837
5838 if (_super_klass->name() == vmSymbols::java_lang_ref_Reference()) {
5839 // Direct subclass of j.l.r.Reference: Soft|Weak|Final|Phantom
5840 return true;
5841 }
5842
5843 return _super_klass->reference_type() != REF_NONE;
5844 }
5845
5846 // Returns true if the future Klass will need to be addressable with a narrow Klass ID.
5847 bool ClassFileParser::klass_needs_narrow_id() const {
5848 // Classes that are never instantiated need no narrow Klass Id, since the
5849 // only point of having a narrow id is to put it into an object header. Keeping
5850 // never instantiated classes out of class space lessens the class space pressure.
5851 // For more details, see JDK-8338526.
5852 return !is_interface() && !is_abstract();
5853 }
5854
5855 // ----------------------------------------------------------------------------
5856 // debugging
5857
5858 #ifdef ASSERT
5859
5860 // return true if class_name contains no '.' (internal format is '/')
5861 bool ClassFileParser::is_internal_format(Symbol* class_name) {
5862 if (class_name != nullptr) {
5863 ResourceMark rm;
5864 char* name = class_name->as_C_string();
5865 return strchr(name, JVM_SIGNATURE_DOT) == nullptr;
5866 } else {
5867 return true;
5868 }
5869 }
5870
5871 #endif