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