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 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
157 assert((bad_constant == JVM_CONSTANT_Module ||
158 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
159 "Unexpected bad constant pool entry");
160 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
161 }
162
163 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
164 ConstantPool* cp,
165 const int length,
166 TRAPS) {
167 assert(stream != nullptr, "invariant");
168 assert(cp != nullptr, "invariant");
169
170 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
171 // this function (_current can be allocated in a register, with scalar
172 // replacement of aggregates). The _current pointer is copied back to
173 // stream() when this function returns. DON'T call another method within
174 // this method that uses stream().
175 const ClassFileStream cfs1 = *stream;
176 const ClassFileStream* const cfs = &cfs1;
177
178 debug_only(const u1* const old_current = stream->current();)
179
180 // Used for batching symbol allocations.
181 const char* names[SymbolTable::symbol_alloc_batch_size];
182 int lengths[SymbolTable::symbol_alloc_batch_size];
183 int indices[SymbolTable::symbol_alloc_batch_size];
184 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
185 int names_count = 0;
186
187 // parsing Index 0 is unused
188 for (int index = 1; index < length; index++) {
189 // Each of the following case guarantees one more byte in the stream
190 // for the following tag or the access_flags following constant pool,
191 // so we don't need bounds-check for reading tag.
192 const u1 tag = cfs->get_u1_fast();
193 switch (tag) {
194 case JVM_CONSTANT_Class : {
195 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
196 const u2 name_index = cfs->get_u2_fast();
197 cp->klass_index_at_put(index, name_index);
198 break;
199 }
200 case JVM_CONSTANT_Fieldref: {
201 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
202 const u2 class_index = cfs->get_u2_fast();
203 const u2 name_and_type_index = cfs->get_u2_fast();
204 cp->field_at_put(index, class_index, name_and_type_index);
205 break;
206 }
207 case JVM_CONSTANT_Methodref: {
208 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
209 const u2 class_index = cfs->get_u2_fast();
210 const u2 name_and_type_index = cfs->get_u2_fast();
211 cp->method_at_put(index, class_index, name_and_type_index);
212 break;
213 }
214 case JVM_CONSTANT_InterfaceMethodref: {
215 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
216 const u2 class_index = cfs->get_u2_fast();
217 const u2 name_and_type_index = cfs->get_u2_fast();
218 cp->interface_method_at_put(index, class_index, name_and_type_index);
219 break;
220 }
221 case JVM_CONSTANT_String : {
222 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
223 const u2 string_index = cfs->get_u2_fast();
224 cp->string_index_at_put(index, string_index);
225 break;
226 }
227 case JVM_CONSTANT_MethodHandle :
228 case JVM_CONSTANT_MethodType: {
229 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
230 classfile_parse_error(
231 "Class file version does not support constant tag %u in class file %s",
232 tag, THREAD);
233 return;
234 }
235 if (tag == JVM_CONSTANT_MethodHandle) {
236 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
237 const u1 ref_kind = cfs->get_u1_fast();
238 const u2 method_index = cfs->get_u2_fast();
239 cp->method_handle_index_at_put(index, ref_kind, method_index);
240 }
241 else if (tag == JVM_CONSTANT_MethodType) {
242 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
243 const u2 signature_index = cfs->get_u2_fast();
244 cp->method_type_index_at_put(index, signature_index);
245 }
246 else {
247 ShouldNotReachHere();
248 }
249 break;
250 }
251 case JVM_CONSTANT_Dynamic : {
252 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
253 classfile_parse_error(
254 "Class file version does not support constant tag %u in class file %s",
255 tag, THREAD);
256 return;
257 }
258 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
259 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
260 const u2 name_and_type_index = cfs->get_u2_fast();
261 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
262 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
263 }
264 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
265 break;
266 }
267 case JVM_CONSTANT_InvokeDynamic : {
268 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
269 classfile_parse_error(
270 "Class file version does not support constant tag %u in class file %s",
271 tag, THREAD);
272 return;
273 }
274 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
275 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
276 const u2 name_and_type_index = cfs->get_u2_fast();
277 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
278 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
279 }
280 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
281 break;
282 }
283 case JVM_CONSTANT_Integer: {
284 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
285 const u4 bytes = cfs->get_u4_fast();
286 cp->int_at_put(index, (jint)bytes);
287 break;
288 }
289 case JVM_CONSTANT_Float: {
290 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
291 const u4 bytes = cfs->get_u4_fast();
292 cp->float_at_put(index, *(jfloat*)&bytes);
293 break;
294 }
295 case JVM_CONSTANT_Long: {
296 // A mangled type might cause you to overrun allocated memory
297 guarantee_property(index + 1 < length,
298 "Invalid constant pool entry %u in class file %s",
299 index,
300 CHECK);
301 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
302 const u8 bytes = cfs->get_u8_fast();
303 cp->long_at_put(index, bytes);
304 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
305 break;
306 }
307 case JVM_CONSTANT_Double: {
308 // A mangled type might cause you to overrun allocated memory
309 guarantee_property(index+1 < length,
310 "Invalid constant pool entry %u in class file %s",
311 index,
312 CHECK);
313 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
314 const u8 bytes = cfs->get_u8_fast();
315 cp->double_at_put(index, *(jdouble*)&bytes);
316 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
317 break;
318 }
319 case JVM_CONSTANT_NameAndType: {
320 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
321 const u2 name_index = cfs->get_u2_fast();
322 const u2 signature_index = cfs->get_u2_fast();
323 cp->name_and_type_at_put(index, name_index, signature_index);
324 break;
325 }
326 case JVM_CONSTANT_Utf8 : {
327 cfs->guarantee_more(2, CHECK); // utf8_length
328 u2 utf8_length = cfs->get_u2_fast();
329 const u1* utf8_buffer = cfs->current();
330 assert(utf8_buffer != nullptr, "null utf8 buffer");
331 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
332 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
333 cfs->skip_u1_fast(utf8_length);
334
335 // Before storing the symbol, make sure it's legal
336 if (_need_verify) {
337 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
338 }
339
340 unsigned int hash;
341 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
342 utf8_length,
343 hash);
344 if (result == nullptr) {
345 names[names_count] = (const char*)utf8_buffer;
346 lengths[names_count] = utf8_length;
347 indices[names_count] = index;
348 hashValues[names_count++] = hash;
349 if (names_count == SymbolTable::symbol_alloc_batch_size) {
350 SymbolTable::new_symbols(_loader_data,
351 constantPoolHandle(THREAD, cp),
352 names_count,
353 names,
354 lengths,
355 indices,
356 hashValues);
357 names_count = 0;
358 }
359 } else {
360 cp->symbol_at_put(index, result);
361 }
362 break;
363 }
364 case JVM_CONSTANT_Module:
365 case JVM_CONSTANT_Package: {
366 // Record that an error occurred in these two cases but keep parsing so
367 // that ACC_Module can be checked for in the access_flags. Need to
368 // throw NoClassDefFoundError in that case.
369 if (_major_version >= JAVA_9_VERSION) {
370 cfs->guarantee_more(3, CHECK);
371 cfs->get_u2_fast();
372 set_class_bad_constant_seen(tag);
373 break;
374 }
375 }
376 default: {
377 classfile_parse_error("Unknown constant tag %u in class file %s",
378 tag,
379 THREAD);
380 return;
381 }
382 } // end of switch(tag)
383 } // end of for
384
385 // Allocate the remaining symbols
386 if (names_count > 0) {
387 SymbolTable::new_symbols(_loader_data,
388 constantPoolHandle(THREAD, cp),
389 names_count,
390 names,
391 lengths,
392 indices,
393 hashValues);
394 }
395
396 // Copy _current pointer of local copy back to stream.
397 assert(stream->current() == old_current, "non-exclusive use of stream");
398 stream->set_current(cfs1.current());
399
400 }
401
402 static inline bool valid_cp_range(int index, int length) {
403 return (index > 0 && index < length);
404 }
405
406 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
407 assert(cp != nullptr, "invariant");
408 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
409 return cp->symbol_at(index);
410 }
411 return nullptr;
412 }
413
414 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
415 ConstantPool* const cp,
416 const int length,
417 TRAPS) {
418 assert(cp != nullptr, "invariant");
419 assert(stream != nullptr, "invariant");
420
421 // parsing constant pool entries
422 parse_constant_pool_entries(stream, cp, length, CHECK);
423 if (class_bad_constant_seen() != 0) {
424 // a bad CP entry has been detected previously so stop parsing and just return.
425 return;
426 }
427
428 int index = 1; // declared outside of loops for portability
429 int num_klasses = 0;
430
431 // first verification pass - validate cross references
432 // and fixup class and string constants
433 for (index = 1; index < length; index++) { // Index 0 is unused
434 const jbyte tag = cp->tag_at(index).value();
435 switch (tag) {
436 case JVM_CONSTANT_Class: {
437 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
438 break;
439 }
440 case JVM_CONSTANT_Fieldref:
441 // fall through
442 case JVM_CONSTANT_Methodref:
443 // fall through
444 case JVM_CONSTANT_InterfaceMethodref: {
445 if (!_need_verify) break;
446 const int klass_ref_index = cp->uncached_klass_ref_index_at(index);
447 const int name_and_type_ref_index = cp->uncached_name_and_type_ref_index_at(index);
448 guarantee_property(valid_klass_reference_at(klass_ref_index),
449 "Invalid constant pool index %u in class file %s",
450 klass_ref_index, CHECK);
451 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
452 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
453 "Invalid constant pool index %u in class file %s",
454 name_and_type_ref_index, CHECK);
455 break;
456 }
457 case JVM_CONSTANT_String: {
458 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
459 break;
460 }
461 case JVM_CONSTANT_Integer:
462 break;
463 case JVM_CONSTANT_Float:
464 break;
465 case JVM_CONSTANT_Long:
466 case JVM_CONSTANT_Double: {
467 index++;
468 guarantee_property(
469 (index < length && cp->tag_at(index).is_invalid()),
470 "Improper constant pool long/double index %u in class file %s",
471 index, CHECK);
472 break;
473 }
474 case JVM_CONSTANT_NameAndType: {
475 if (!_need_verify) break;
476 const int name_ref_index = cp->name_ref_index_at(index);
477 const int signature_ref_index = cp->signature_ref_index_at(index);
478 guarantee_property(valid_symbol_at(name_ref_index),
479 "Invalid constant pool index %u in class file %s",
480 name_ref_index, CHECK);
481 guarantee_property(valid_symbol_at(signature_ref_index),
482 "Invalid constant pool index %u in class file %s",
483 signature_ref_index, CHECK);
484 break;
485 }
486 case JVM_CONSTANT_Utf8:
487 break;
488 case JVM_CONSTANT_UnresolvedClass: // fall-through
489 case JVM_CONSTANT_UnresolvedClassInError: {
490 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
491 break;
492 }
493 case JVM_CONSTANT_ClassIndex: {
494 const int class_index = cp->klass_index_at(index);
495 guarantee_property(valid_symbol_at(class_index),
496 "Invalid constant pool index %u in class file %s",
497 class_index, CHECK);
498 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
499 break;
500 }
501 case JVM_CONSTANT_StringIndex: {
502 const int string_index = cp->string_index_at(index);
503 guarantee_property(valid_symbol_at(string_index),
504 "Invalid constant pool index %u in class file %s",
505 string_index, CHECK);
506 Symbol* const sym = cp->symbol_at(string_index);
507 cp->unresolved_string_at_put(index, sym);
508 break;
509 }
510 case JVM_CONSTANT_MethodHandle: {
511 const int ref_index = cp->method_handle_index_at(index);
512 guarantee_property(valid_cp_range(ref_index, length),
513 "Invalid constant pool index %u in class file %s",
514 ref_index, CHECK);
515 const constantTag tag = cp->tag_at(ref_index);
516 const int ref_kind = cp->method_handle_ref_kind_at(index);
517
518 switch (ref_kind) {
519 case JVM_REF_getField:
520 case JVM_REF_getStatic:
521 case JVM_REF_putField:
522 case JVM_REF_putStatic: {
523 guarantee_property(
524 tag.is_field(),
525 "Invalid constant pool index %u in class file %s (not a field)",
526 ref_index, CHECK);
527 break;
528 }
529 case JVM_REF_invokeVirtual:
530 case JVM_REF_newInvokeSpecial: {
531 guarantee_property(
532 tag.is_method(),
533 "Invalid constant pool index %u in class file %s (not a method)",
534 ref_index, CHECK);
535 break;
536 }
537 case JVM_REF_invokeStatic:
538 case JVM_REF_invokeSpecial: {
539 guarantee_property(
540 tag.is_method() ||
541 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
542 "Invalid constant pool index %u in class file %s (not a method)",
543 ref_index, CHECK);
544 break;
545 }
546 case JVM_REF_invokeInterface: {
547 guarantee_property(
548 tag.is_interface_method(),
549 "Invalid constant pool index %u in class file %s (not an interface method)",
550 ref_index, CHECK);
551 break;
552 }
553 default: {
554 classfile_parse_error(
555 "Bad method handle kind at constant pool index %u in class file %s",
556 index, THREAD);
557 return;
558 }
559 } // switch(refkind)
560 // Keep the ref_index unchanged. It will be indirected at link-time.
561 break;
562 } // case MethodHandle
563 case JVM_CONSTANT_MethodType: {
564 const int ref_index = cp->method_type_index_at(index);
565 guarantee_property(valid_symbol_at(ref_index),
566 "Invalid constant pool index %u in class file %s",
567 ref_index, CHECK);
568 break;
569 }
570 case JVM_CONSTANT_Dynamic: {
571 const int name_and_type_ref_index =
572 cp->bootstrap_name_and_type_ref_index_at(index);
573
574 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
575 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
576 "Invalid constant pool index %u in class file %s",
577 name_and_type_ref_index, CHECK);
578 // bootstrap specifier index must be checked later,
579 // when BootstrapMethods attr is available
580
581 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
582 cp->set_has_dynamic_constant();
583 break;
584 }
585 case JVM_CONSTANT_InvokeDynamic: {
586 const int name_and_type_ref_index =
587 cp->bootstrap_name_and_type_ref_index_at(index);
588
589 guarantee_property(valid_cp_range(name_and_type_ref_index, length) &&
590 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
591 "Invalid constant pool index %u in class file %s",
592 name_and_type_ref_index, CHECK);
593 // bootstrap specifier index must be checked later,
594 // when BootstrapMethods attr is available
595 break;
596 }
597 default: {
598 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
599 ShouldNotReachHere();
600 break;
601 }
602 } // switch(tag)
603 } // end of for
604
605 cp->allocate_resolved_klasses(_loader_data, num_klasses, CHECK);
606
607 if (!_need_verify) {
608 return;
609 }
610
611 // second verification pass - checks the strings are of the right format.
612 // but not yet to the other entries
613 for (index = 1; index < length; index++) {
614 const jbyte tag = cp->tag_at(index).value();
615 switch (tag) {
616 case JVM_CONSTANT_UnresolvedClass: {
617 const Symbol* const class_name = cp->klass_name_at(index);
618 // check the name
619 verify_legal_class_name(class_name, CHECK);
620 break;
621 }
622 case JVM_CONSTANT_NameAndType: {
623 if (_need_verify) {
624 const int sig_index = cp->signature_ref_index_at(index);
625 const int name_index = cp->name_ref_index_at(index);
626 const Symbol* const name = cp->symbol_at(name_index);
627 const Symbol* const sig = cp->symbol_at(sig_index);
628 guarantee_property(sig->utf8_length() != 0,
629 "Illegal zero length constant pool entry at %d in class %s",
630 sig_index, CHECK);
631 guarantee_property(name->utf8_length() != 0,
632 "Illegal zero length constant pool entry at %d in class %s",
633 name_index, CHECK);
634
635 if (Signature::is_method(sig)) {
636 // Format check method name and signature
637 verify_legal_method_name(name, CHECK);
638 verify_legal_method_signature(name, sig, CHECK);
639 } else {
640 // Format check field name and signature
641 verify_legal_field_name(name, CHECK);
642 verify_legal_field_signature(name, sig, CHECK);
643 }
644 }
645 break;
646 }
647 case JVM_CONSTANT_Dynamic: {
648 const int name_and_type_ref_index =
649 cp->uncached_name_and_type_ref_index_at(index);
650 // already verified to be utf8
651 const int name_ref_index =
652 cp->name_ref_index_at(name_and_type_ref_index);
653 // already verified to be utf8
654 const int signature_ref_index =
655 cp->signature_ref_index_at(name_and_type_ref_index);
656 const Symbol* const name = cp->symbol_at(name_ref_index);
657 const Symbol* const signature = cp->symbol_at(signature_ref_index);
658 if (_need_verify) {
659 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
660 // Need only to be sure signature is the right type.
661 if (Signature::is_method(signature)) {
662 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
663 }
664 }
665 break;
666 }
667 case JVM_CONSTANT_InvokeDynamic:
668 case JVM_CONSTANT_Fieldref:
669 case JVM_CONSTANT_Methodref:
670 case JVM_CONSTANT_InterfaceMethodref: {
671 const int name_and_type_ref_index =
672 cp->uncached_name_and_type_ref_index_at(index);
673 // already verified to be utf8
674 const int name_ref_index =
675 cp->name_ref_index_at(name_and_type_ref_index);
676 // already verified to be utf8
677 const int signature_ref_index =
678 cp->signature_ref_index_at(name_and_type_ref_index);
679 const Symbol* const name = cp->symbol_at(name_ref_index);
680 const Symbol* const signature = cp->symbol_at(signature_ref_index);
681 if (tag == JVM_CONSTANT_Fieldref) {
682 if (_need_verify) {
683 // Field name and signature are verified above, when iterating NameAndType_info.
684 // Need only to be sure signature is non-zero length and the right type.
685 if (Signature::is_method(signature)) {
686 throwIllegalSignature("Field", name, signature, CHECK);
687 }
688 }
689 } else {
690 if (_need_verify) {
691 // Method name and signature are individually verified above, when iterating
692 // NameAndType_info. Need to check here that signature is non-zero length and
693 // the right type.
694 if (!Signature::is_method(signature)) {
695 throwIllegalSignature("Method", name, signature, CHECK);
696 }
697 }
698 // If a class method name begins with '<', it must be "<init>" and have void signature.
699 const unsigned int name_len = name->utf8_length();
700 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
701 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
702 if (name != vmSymbols::object_initializer_name()) {
703 classfile_parse_error(
704 "Bad method name at constant pool index %u in class file %s",
705 name_ref_index, THREAD);
706 return;
707 } else if (!Signature::is_void_method(signature)) { // must have void signature.
708 throwIllegalSignature("Method", name, signature, CHECK);
709 }
710 }
711 }
712 break;
713 }
714 case JVM_CONSTANT_MethodHandle: {
715 const int ref_index = cp->method_handle_index_at(index);
716 const int ref_kind = cp->method_handle_ref_kind_at(index);
717 switch (ref_kind) {
718 case JVM_REF_invokeVirtual:
719 case JVM_REF_invokeStatic:
720 case JVM_REF_invokeSpecial:
721 case JVM_REF_newInvokeSpecial: {
722 const int name_and_type_ref_index =
723 cp->uncached_name_and_type_ref_index_at(ref_index);
724 const int name_ref_index =
725 cp->name_ref_index_at(name_and_type_ref_index);
726 const Symbol* const name = cp->symbol_at(name_ref_index);
727 if (ref_kind == JVM_REF_newInvokeSpecial) {
728 if (name != vmSymbols::object_initializer_name()) {
729 classfile_parse_error(
730 "Bad constructor name at constant pool index %u in class file %s",
731 name_ref_index, THREAD);
732 return;
733 }
734 } else {
735 if (name == vmSymbols::object_initializer_name()) {
736 classfile_parse_error(
737 "Bad method name at constant pool index %u in class file %s",
738 name_ref_index, THREAD);
739 return;
740 }
741 }
742 break;
743 }
744 // Other ref_kinds are already fully checked in previous pass.
745 } // switch(ref_kind)
746 break;
747 }
748 case JVM_CONSTANT_MethodType: {
749 const Symbol* const no_name = vmSymbols::type_name(); // place holder
750 const Symbol* const signature = cp->method_type_signature_at(index);
751 verify_legal_method_signature(no_name, signature, CHECK);
752 break;
753 }
754 case JVM_CONSTANT_Utf8: {
755 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
756 }
757 } // switch(tag)
758 } // end of for
759 }
760
761 class NameSigHash: public ResourceObj {
762 public:
763 const Symbol* _name; // name
764 const Symbol* _sig; // signature
765
766 static const int HASH_ROW_SIZE = 256;
767
768 NameSigHash(Symbol* name, Symbol* sig) :
769 _name(name),
770 _sig(sig) {}
771
772 static unsigned int hash(NameSigHash const& namesig) {
773 return namesig._name->identity_hash() ^ namesig._sig->identity_hash();
774 }
775
776 static bool equals(NameSigHash const& e0, NameSigHash const& e1) {
777 return (e0._name == e1._name) &&
778 (e0._sig == e1._sig);
779 }
780 };
781
782 using NameSigHashtable = ResourceHashtable<NameSigHash, int,
783 NameSigHash::HASH_ROW_SIZE,
784 AnyObj::RESOURCE_AREA, mtInternal,
785 &NameSigHash::hash, &NameSigHash::equals>;
786
787 // Side-effects: populates the _local_interfaces field
788 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
789 const int itfs_len,
790 ConstantPool* const cp,
791 bool* const has_nonstatic_concrete_methods,
792 TRAPS) {
793 assert(stream != nullptr, "invariant");
794 assert(cp != nullptr, "invariant");
795 assert(has_nonstatic_concrete_methods != nullptr, "invariant");
796
797 if (itfs_len == 0) {
798 _local_interfaces = Universe::the_empty_instance_klass_array();
799 } else {
800 assert(itfs_len > 0, "only called for len>0");
801 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, nullptr, CHECK);
802
803 int index;
804 for (index = 0; index < itfs_len; index++) {
805 const u2 interface_index = stream->get_u2(CHECK);
806 Klass* interf;
807 guarantee_property(
808 valid_klass_reference_at(interface_index),
809 "Interface name has bad constant pool index %u in class file %s",
810 interface_index, CHECK);
811 if (cp->tag_at(interface_index).is_klass()) {
812 interf = cp->resolved_klass_at(interface_index);
813 } else {
814 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
815
816 // Don't need to check legal name because it's checked when parsing constant pool.
817 // But need to make sure it's not an array type.
818 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
819 "Bad interface name in class file %s", CHECK);
820
821 // Call resolve on the interface class name with class circularity checking
822 interf = SystemDictionary::resolve_super_or_fail(_class_name,
823 unresolved_klass,
824 Handle(THREAD, _loader_data->class_loader()),
825 _protection_domain,
826 false, CHECK);
827 }
828
829 if (!interf->is_interface()) {
830 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
831 err_msg("class %s can not implement %s, because it is not an interface (%s)",
832 _class_name->as_klass_external_name(),
833 interf->external_name(),
834 interf->class_in_module_of_loader()));
835 }
836
837 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
838 *has_nonstatic_concrete_methods = true;
839 }
840 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
841 }
842
843 if (!_need_verify || itfs_len <= 1) {
844 return;
845 }
846
847 // Check if there's any duplicates in interfaces
848 ResourceMark rm(THREAD);
849 // Set containing interface names
850 ResourceHashtable<Symbol*, int>* interface_names = new ResourceHashtable<Symbol*, int>();
851 for (index = 0; index < itfs_len; index++) {
852 const InstanceKlass* const k = _local_interfaces->at(index);
853 Symbol* interface_name = k->name();
854 // If no duplicates, add (name, nullptr) in hashtable interface_names.
855 if (!interface_names->put(interface_name, 0)) {
856 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
857 interface_name->as_C_string(), THREAD);
858 return;
859 }
860 }
861 }
862 }
863
864 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
865 int constantvalue_index,
866 int signature_index,
867 TRAPS) const {
868 // Make sure the constant pool entry is of a type appropriate to this field
869 guarantee_property(
870 (constantvalue_index > 0 &&
871 constantvalue_index < cp->length()),
872 "Bad initial value index %u in ConstantValue attribute in class file %s",
873 constantvalue_index, CHECK);
874
875 const constantTag value_type = cp->tag_at(constantvalue_index);
876 switch(cp->basic_type_for_signature_at(signature_index)) {
877 case T_LONG: {
878 guarantee_property(value_type.is_long(),
879 "Inconsistent constant value type in class file %s",
880 CHECK);
881 break;
882 }
883 case T_FLOAT: {
884 guarantee_property(value_type.is_float(),
885 "Inconsistent constant value type in class file %s",
886 CHECK);
887 break;
888 }
889 case T_DOUBLE: {
890 guarantee_property(value_type.is_double(),
891 "Inconsistent constant value type in class file %s",
892 CHECK);
893 break;
894 }
895 case T_BYTE:
896 case T_CHAR:
897 case T_SHORT:
898 case T_BOOLEAN:
899 case T_INT: {
900 guarantee_property(value_type.is_int(),
901 "Inconsistent constant value type in class file %s",
902 CHECK);
903 break;
904 }
905 case T_OBJECT: {
906 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
907 && value_type.is_string()),
908 "Bad string initial value in class file %s",
909 CHECK);
910 break;
911 }
912 default: {
913 classfile_parse_error("Unable to set initial value %u in class file %s",
914 constantvalue_index,
915 THREAD);
916 }
917 }
918 }
919
920 class AnnotationCollector : public ResourceObj{
921 public:
922 enum Location { _in_field, _in_method, _in_class };
923 enum ID {
924 _unknown = 0,
925 _method_CallerSensitive,
926 _method_ForceInline,
927 _method_DontInline,
928 _method_ChangesCurrentThread,
929 _method_JvmtiHideEvents,
930 _method_JvmtiMountTransition,
931 _method_InjectedProfile,
932 _method_LambdaForm_Compiled,
933 _method_Hidden,
934 _method_Scoped,
935 _method_IntrinsicCandidate,
936 _jdk_internal_vm_annotation_Contended,
937 _field_Stable,
938 _jdk_internal_vm_annotation_ReservedStackAccess,
939 _jdk_internal_ValueBased,
940 _java_lang_Deprecated,
941 _java_lang_Deprecated_for_removal,
942 _annotation_LIMIT
943 };
944 const Location _location;
945 int _annotations_present;
946 u2 _contended_group;
947
948 AnnotationCollector(Location location)
949 : _location(location), _annotations_present(0), _contended_group(0)
950 {
951 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
952 }
953 // If this annotation name has an ID, report it (or _none).
954 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
955 // Set the annotation name:
956 void set_annotation(ID id) {
957 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
958 _annotations_present |= (int)nth_bit((int)id);
959 }
960
961 void remove_annotation(ID id) {
962 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
963 _annotations_present &= (int)~nth_bit((int)id);
964 }
965
966 // Report if the annotation is present.
967 bool has_any_annotations() const { return _annotations_present != 0; }
968 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
969
970 void set_contended_group(u2 group) { _contended_group = group; }
971 u2 contended_group() const { return _contended_group; }
972
973 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
974
975 void set_stable(bool stable) { set_annotation(_field_Stable); }
976 bool is_stable() const { return has_annotation(_field_Stable); }
977 };
978
979 // This class also doubles as a holder for metadata cleanup.
980 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
981 private:
982 ClassLoaderData* _loader_data;
983 AnnotationArray* _field_annotations;
984 AnnotationArray* _field_type_annotations;
985 public:
986 FieldAnnotationCollector(ClassLoaderData* loader_data) :
987 AnnotationCollector(_in_field),
988 _loader_data(loader_data),
989 _field_annotations(nullptr),
990 _field_type_annotations(nullptr) {}
991 ~FieldAnnotationCollector();
992 void apply_to(FieldInfo* f);
993 AnnotationArray* field_annotations() { return _field_annotations; }
994 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
995
996 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
997 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
998 };
999
1000 class MethodAnnotationCollector : public AnnotationCollector{
1001 public:
1002 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1003 void apply_to(const methodHandle& m);
1004 };
1005
1006 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1007 public:
1008 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1009 void apply_to(InstanceKlass* ik);
1010 };
1011
1012
1013 static int skip_annotation_value(const u1*, int, int); // fwd decl
1014
1015 // Safely increment index by val if does not pass limit
1016 #define SAFE_ADD(index, limit, val) \
1017 if (index >= limit - val) return limit; \
1018 index += val;
1019
1020 // Skip an annotation. Return >=limit if there is any problem.
1021 static int skip_annotation(const u1* buffer, int limit, int index) {
1022 assert(buffer != nullptr, "invariant");
1023 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1024 // value := switch (tag:u1) { ... }
1025 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1026 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1027 while (--nmem >= 0 && index < limit) {
1028 SAFE_ADD(index, limit, 2); // skip member
1029 index = skip_annotation_value(buffer, limit, index);
1030 }
1031 return index;
1032 }
1033
1034 // Skip an annotation value. Return >=limit if there is any problem.
1035 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1036 assert(buffer != nullptr, "invariant");
1037
1038 // value := switch (tag:u1) {
1039 // case B, C, I, S, Z, D, F, J, c: con:u2;
1040 // case e: e_class:u2 e_name:u2;
1041 // case s: s_con:u2;
1042 // case [: do(nval:u2) {value};
1043 // case @: annotation;
1044 // case s: s_con:u2;
1045 // }
1046 SAFE_ADD(index, limit, 1); // read tag
1047 const u1 tag = buffer[index - 1];
1048 switch (tag) {
1049 case 'B':
1050 case 'C':
1051 case 'I':
1052 case 'S':
1053 case 'Z':
1054 case 'D':
1055 case 'F':
1056 case 'J':
1057 case 'c':
1058 case 's':
1059 SAFE_ADD(index, limit, 2); // skip con or s_con
1060 break;
1061 case 'e':
1062 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1063 break;
1064 case '[':
1065 {
1066 SAFE_ADD(index, limit, 2); // read nval
1067 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1068 while (--nval >= 0 && index < limit) {
1069 index = skip_annotation_value(buffer, limit, index);
1070 }
1071 }
1072 break;
1073 case '@':
1074 index = skip_annotation(buffer, limit, index);
1075 break;
1076 default:
1077 return limit; // bad tag byte
1078 }
1079 return index;
1080 }
1081
1082 // Sift through annotations, looking for those significant to the VM:
1083 static void parse_annotations(const ConstantPool* const cp,
1084 const u1* buffer, int limit,
1085 AnnotationCollector* coll,
1086 ClassLoaderData* loader_data,
1087 const bool can_access_vm_annotations) {
1088
1089 assert(cp != nullptr, "invariant");
1090 assert(buffer != nullptr, "invariant");
1091 assert(coll != nullptr, "invariant");
1092 assert(loader_data != nullptr, "invariant");
1093
1094 // annotations := do(nann:u2) {annotation}
1095 int index = 2; // read nann
1096 if (index >= limit) return;
1097 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1098 enum { // initial annotation layout
1099 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1100 count_off = 2, // u2 such as 1 (one value)
1101 member_off = 4, // utf8 such as 'value'
1102 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1103 e_tag_val = 'e',
1104 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1105 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1106 e_size = 11, // end of 'e' annotation
1107 c_tag_val = 'c', // payload is type
1108 c_con_off = 7, // utf8 payload, such as 'I'
1109 c_size = 9, // end of 'c' annotation
1110 s_tag_val = 's', // payload is String
1111 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1112 s_size = 9,
1113 b_tag_val = 'Z', // payload is boolean
1114 min_size = 6 // smallest possible size (zero members)
1115 };
1116 // Cannot add min_size to index in case of overflow MAX_INT
1117 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1118 int index0 = index;
1119 index = skip_annotation(buffer, limit, index);
1120 const u1* const abase = buffer + index0;
1121 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1122 const int count = Bytes::get_Java_u2((address)abase + count_off);
1123 const Symbol* const aname = check_symbol_at(cp, atype);
1124 if (aname == nullptr) break; // invalid annotation name
1125 const Symbol* member = nullptr;
1126 if (count >= 1) {
1127 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1128 member = check_symbol_at(cp, member_index);
1129 if (member == nullptr) break; // invalid member name
1130 }
1131
1132 // Here is where parsing particular annotations will take place.
1133 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1134 if (AnnotationCollector::_unknown == id) continue;
1135 coll->set_annotation(id);
1136 if (AnnotationCollector::_java_lang_Deprecated == id) {
1137 // @Deprecated can specify forRemoval=true, which we need
1138 // to record for JFR to use. If the annotation is not well-formed
1139 // then we may not be able to determine that.
1140 const u1* offset = abase + member_off;
1141 // There are only 2 members in @Deprecated.
1142 int n_members = MIN2(count, 2);
1143 for (int i = 0; i < n_members; ++i) {
1144 int member_index = Bytes::get_Java_u2((address)offset);
1145 offset += 2;
1146 member = check_symbol_at(cp, member_index);
1147 if (member == vmSymbols::since() &&
1148 (*((address)offset) == s_tag_val)) {
1149 // Found `since` first so skip over it
1150 offset += 3;
1151 }
1152 else if (member == vmSymbols::for_removal() &&
1153 (*((address)offset) == b_tag_val)) {
1154 const u2 boolean_value_index = Bytes::get_Java_u2((address)offset + 1);
1155 // No guarantee the entry is valid so check it refers to an int in the CP.
1156 if (cp->is_within_bounds(boolean_value_index) &&
1157 cp->tag_at(boolean_value_index).is_int() &&
1158 cp->int_at(boolean_value_index) == 1) {
1159 // forRemoval == true
1160 coll->set_annotation(AnnotationCollector::_java_lang_Deprecated_for_removal);
1161 }
1162 break; // no need to check further
1163 }
1164 else {
1165 // This @Deprecated annotation is malformed so we don't try to
1166 // determine whether forRemoval is set.
1167 break;
1168 }
1169 }
1170 continue; // proceed to next annotation
1171 }
1172
1173 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1174 // @Contended can optionally specify the contention group.
1175 //
1176 // Contended group defines the equivalence class over the fields:
1177 // the fields within the same contended group are not treated distinct.
1178 // The only exception is default group, which does not incur the
1179 // equivalence. Naturally, contention group for classes is meaningless.
1180 //
1181 // While the contention group is specified as String, annotation
1182 // values are already interned, and we might as well use the constant
1183 // pool index as the group tag.
1184 //
1185 u2 group_index = 0; // default contended group
1186 if (count == 1
1187 && s_size == (index - index0) // match size
1188 && s_tag_val == *(abase + tag_off)
1189 && member == vmSymbols::value_name()) {
1190 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1191 // No guarantee the group_index is valid so check it refers to a
1192 // symbol in the CP.
1193 if (cp->is_within_bounds(group_index) &&
1194 cp->tag_at(group_index).is_utf8()) {
1195 // Seems valid, so check for empty string and reset
1196 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1197 group_index = 0; // default contended group
1198 }
1199 } else {
1200 // Not valid so use the default
1201 group_index = 0;
1202 }
1203 }
1204 coll->set_contended_group(group_index);
1205 continue; // proceed to next annotation
1206 }
1207 }
1208 }
1209
1210
1211 // Parse attributes for a field.
1212 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1213 u2 attributes_count,
1214 bool is_static, u2 signature_index,
1215 u2* const constantvalue_index_addr,
1216 bool* const is_synthetic_addr,
1217 u2* const generic_signature_index_addr,
1218 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1219 TRAPS) {
1220 assert(cfs != nullptr, "invariant");
1221 assert(constantvalue_index_addr != nullptr, "invariant");
1222 assert(is_synthetic_addr != nullptr, "invariant");
1223 assert(generic_signature_index_addr != nullptr, "invariant");
1224 assert(parsed_annotations != nullptr, "invariant");
1225 assert(attributes_count > 0, "attributes_count should be greater than 0");
1226
1227 u2 constantvalue_index = 0;
1228 u2 generic_signature_index = 0;
1229 bool is_synthetic = false;
1230 const u1* runtime_visible_annotations = nullptr;
1231 int runtime_visible_annotations_length = 0;
1232 const u1* runtime_visible_type_annotations = nullptr;
1233 int runtime_visible_type_annotations_length = 0;
1234 bool runtime_invisible_annotations_exists = false;
1235 bool runtime_invisible_type_annotations_exists = false;
1236 const ConstantPool* const cp = _cp;
1237
1238 while (attributes_count--) {
1239 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1240 const u2 attribute_name_index = cfs->get_u2_fast();
1241 const u4 attribute_length = cfs->get_u4_fast();
1242 guarantee_property(valid_symbol_at(attribute_name_index),
1243 "Invalid field attribute index %u in class file %s",
1244 attribute_name_index,
1245 CHECK);
1246
1247 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1248 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1249 // ignore if non-static
1250 if (constantvalue_index != 0) {
1251 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1252 return;
1253 }
1254 guarantee_property(
1255 attribute_length == 2,
1256 "Invalid ConstantValue field attribute length %u in class file %s",
1257 attribute_length, CHECK);
1258
1259 constantvalue_index = cfs->get_u2(CHECK);
1260 if (_need_verify) {
1261 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1262 }
1263 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1264 if (attribute_length != 0) {
1265 classfile_parse_error(
1266 "Invalid Synthetic field attribute length %u in class file %s",
1267 attribute_length, THREAD);
1268 return;
1269 }
1270 is_synthetic = true;
1271 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1272 if (attribute_length != 0) {
1273 classfile_parse_error(
1274 "Invalid Deprecated field attribute length %u in class file %s",
1275 attribute_length, THREAD);
1276 return;
1277 }
1278 } else if (_major_version >= JAVA_1_5_VERSION) {
1279 if (attribute_name == vmSymbols::tag_signature()) {
1280 if (generic_signature_index != 0) {
1281 classfile_parse_error(
1282 "Multiple Signature attributes for field in class file %s", THREAD);
1283 return;
1284 }
1285 if (attribute_length != 2) {
1286 classfile_parse_error(
1287 "Wrong size %u for field's Signature attribute in class file %s",
1288 attribute_length, THREAD);
1289 return;
1290 }
1291 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1292 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1293 if (runtime_visible_annotations != nullptr) {
1294 classfile_parse_error(
1295 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1296 return;
1297 }
1298 runtime_visible_annotations_length = attribute_length;
1299 runtime_visible_annotations = cfs->current();
1300 assert(runtime_visible_annotations != nullptr, "null visible annotations");
1301 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1302 parse_annotations(cp,
1303 runtime_visible_annotations,
1304 runtime_visible_annotations_length,
1305 parsed_annotations,
1306 _loader_data,
1307 _can_access_vm_annotations);
1308 cfs->skip_u1_fast(runtime_visible_annotations_length);
1309 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1310 if (runtime_invisible_annotations_exists) {
1311 classfile_parse_error(
1312 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1313 return;
1314 }
1315 runtime_invisible_annotations_exists = true;
1316 cfs->skip_u1(attribute_length, CHECK);
1317 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1318 if (runtime_visible_type_annotations != nullptr) {
1319 classfile_parse_error(
1320 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1321 return;
1322 }
1323 runtime_visible_type_annotations_length = attribute_length;
1324 runtime_visible_type_annotations = cfs->current();
1325 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
1326 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1327 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1328 if (runtime_invisible_type_annotations_exists) {
1329 classfile_parse_error(
1330 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1331 return;
1332 } else {
1333 runtime_invisible_type_annotations_exists = true;
1334 }
1335 cfs->skip_u1(attribute_length, CHECK);
1336 } else {
1337 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1338 }
1339 } else {
1340 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1341 }
1342 }
1343
1344 *constantvalue_index_addr = constantvalue_index;
1345 *is_synthetic_addr = is_synthetic;
1346 *generic_signature_index_addr = generic_signature_index;
1347 AnnotationArray* a = allocate_annotations(runtime_visible_annotations,
1348 runtime_visible_annotations_length,
1349 CHECK);
1350 parsed_annotations->set_field_annotations(a);
1351 a = allocate_annotations(runtime_visible_type_annotations,
1352 runtime_visible_type_annotations_length,
1353 CHECK);
1354 parsed_annotations->set_field_type_annotations(a);
1355 return;
1356 }
1357
1358
1359 // Side-effects: populates the _fields, _fields_annotations,
1360 // _fields_type_annotations fields
1361 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1362 bool is_interface,
1363 ConstantPool* cp,
1364 const int cp_size,
1365 u2* const java_fields_count_ptr,
1366 TRAPS) {
1367
1368 assert(cfs != nullptr, "invariant");
1369 assert(cp != nullptr, "invariant");
1370 assert(java_fields_count_ptr != nullptr, "invariant");
1371
1372 assert(nullptr == _fields_annotations, "invariant");
1373 assert(nullptr == _fields_type_annotations, "invariant");
1374
1375 cfs->guarantee_more(2, CHECK); // length
1376 const u2 length = cfs->get_u2_fast();
1377 *java_fields_count_ptr = length;
1378
1379 int num_injected = 0;
1380 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1381 &num_injected);
1382 const int total_fields = length + num_injected;
1383
1384 // Allocate a temporary resource array to collect field data.
1385 // After parsing all fields, data are stored in a UNSIGNED5 compressed stream.
1386 _temp_field_info = new GrowableArray<FieldInfo>(total_fields);
1387
1388 ResourceMark rm(THREAD);
1389 for (int n = 0; n < length; n++) {
1390 // access_flags, name_index, descriptor_index, attributes_count
1391 cfs->guarantee_more(8, CHECK);
1392
1393 AccessFlags access_flags;
1394 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1395 verify_legal_field_modifiers(flags, is_interface, CHECK);
1396 access_flags.set_flags(flags);
1397 FieldInfo::FieldFlags fieldFlags(0);
1398
1399 const u2 name_index = cfs->get_u2_fast();
1400 guarantee_property(valid_symbol_at(name_index),
1401 "Invalid constant pool index %u for field name in class file %s",
1402 name_index, CHECK);
1403 const Symbol* const name = cp->symbol_at(name_index);
1404 verify_legal_field_name(name, CHECK);
1405
1406 const u2 signature_index = cfs->get_u2_fast();
1407 guarantee_property(valid_symbol_at(signature_index),
1408 "Invalid constant pool index %u for field signature in class file %s",
1409 signature_index, CHECK);
1410 const Symbol* const sig = cp->symbol_at(signature_index);
1411 verify_legal_field_signature(name, sig, CHECK);
1412
1413 u2 constantvalue_index = 0;
1414 bool is_synthetic = false;
1415 u2 generic_signature_index = 0;
1416 const bool is_static = access_flags.is_static();
1417 FieldAnnotationCollector parsed_annotations(_loader_data);
1418
1419 const u2 attributes_count = cfs->get_u2_fast();
1420 if (attributes_count > 0) {
1421 parse_field_attributes(cfs,
1422 attributes_count,
1423 is_static,
1424 signature_index,
1425 &constantvalue_index,
1426 &is_synthetic,
1427 &generic_signature_index,
1428 &parsed_annotations,
1429 CHECK);
1430
1431 if (parsed_annotations.field_annotations() != nullptr) {
1432 if (_fields_annotations == nullptr) {
1433 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1434 _loader_data, length, nullptr,
1435 CHECK);
1436 }
1437 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1438 parsed_annotations.set_field_annotations(nullptr);
1439 }
1440 if (parsed_annotations.field_type_annotations() != nullptr) {
1441 if (_fields_type_annotations == nullptr) {
1442 _fields_type_annotations =
1443 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1444 length,
1445 nullptr,
1446 CHECK);
1447 }
1448 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1449 parsed_annotations.set_field_type_annotations(nullptr);
1450 }
1451
1452 if (is_synthetic) {
1453 access_flags.set_is_synthetic();
1454 }
1455 if (generic_signature_index != 0) {
1456 fieldFlags.update_generic(true);
1457 }
1458 }
1459
1460 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1461
1462 // Update number of static oop fields.
1463 if (is_static && is_reference_type(type)) {
1464 _static_oop_count++;
1465 }
1466
1467 FieldInfo fi(access_flags, name_index, signature_index, constantvalue_index, fieldFlags);
1468 fi.set_index(n);
1469 if (fieldFlags.is_generic()) {
1470 fi.set_generic_signature_index(generic_signature_index);
1471 }
1472 parsed_annotations.apply_to(&fi);
1473 if (fi.field_flags().is_contended()) {
1474 _has_contended_fields = true;
1475 }
1476 _temp_field_info->append(fi);
1477 }
1478 assert(_temp_field_info->length() == length, "Must be");
1479
1480 int index = length;
1481 if (num_injected != 0) {
1482 for (int n = 0; n < num_injected; n++) {
1483 // Check for duplicates
1484 if (injected[n].may_be_java) {
1485 const Symbol* const name = injected[n].name();
1486 const Symbol* const signature = injected[n].signature();
1487 bool duplicate = false;
1488 for (int i = 0; i < length; i++) {
1489 const FieldInfo* const f = _temp_field_info->adr_at(i);
1490 if (name == cp->symbol_at(f->name_index()) &&
1491 signature == cp->symbol_at(f->signature_index())) {
1492 // Symbol is desclared in Java so skip this one
1493 duplicate = true;
1494 break;
1495 }
1496 }
1497 if (duplicate) {
1498 // These will be removed from the field array at the end
1499 continue;
1500 }
1501 }
1502
1503 // Injected field
1504 FieldInfo::FieldFlags fflags(0);
1505 fflags.update_injected(true);
1506 AccessFlags aflags;
1507 FieldInfo fi(aflags, (u2)(injected[n].name_index), (u2)(injected[n].signature_index), 0, fflags);
1508 fi.set_index(index);
1509 _temp_field_info->append(fi);
1510 index++;
1511 }
1512 }
1513
1514 assert(_temp_field_info->length() == index, "Must be");
1515
1516 if (_need_verify && length > 1) {
1517 // Check duplicated fields
1518 ResourceMark rm(THREAD);
1519 // Set containing name-signature pairs
1520 NameSigHashtable* names_and_sigs = new NameSigHashtable();
1521 for (int i = 0; i < _temp_field_info->length(); i++) {
1522 NameSigHash name_and_sig(_temp_field_info->adr_at(i)->name(_cp),
1523 _temp_field_info->adr_at(i)->signature(_cp));
1524 // If no duplicates, add name/signature in hashtable names_and_sigs.
1525 if(!names_and_sigs->put(name_and_sig, 0)) {
1526 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1527 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
1528 return;
1529 }
1530 }
1531 }
1532 }
1533
1534
1535 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1536 u4 code_length,
1537 u4 exception_table_length,
1538 TRAPS) {
1539 assert(cfs != nullptr, "invariant");
1540
1541 const unsafe_u2* const exception_table_start = cfs->current();
1542 assert(exception_table_start != nullptr, "null exception table");
1543
1544 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1545 // end_pc,
1546 // handler_pc,
1547 // catch_type_index
1548
1549 // Will check legal target after parsing code array in verifier.
1550 if (_need_verify) {
1551 for (unsigned int i = 0; i < exception_table_length; i++) {
1552 const u2 start_pc = cfs->get_u2_fast();
1553 const u2 end_pc = cfs->get_u2_fast();
1554 const u2 handler_pc = cfs->get_u2_fast();
1555 const u2 catch_type_index = cfs->get_u2_fast();
1556 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1557 "Illegal exception table range in class file %s",
1558 CHECK_NULL);
1559 guarantee_property(handler_pc < code_length,
1560 "Illegal exception table handler in class file %s",
1561 CHECK_NULL);
1562 if (catch_type_index != 0) {
1563 guarantee_property(valid_klass_reference_at(catch_type_index),
1564 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1565 }
1566 }
1567 } else {
1568 cfs->skip_u2_fast(exception_table_length * 4);
1569 }
1570 return exception_table_start;
1571 }
1572
1573 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1574 u4 code_length,
1575 CompressedLineNumberWriteStream**const write_stream,
1576 TRAPS) {
1577
1578 const ClassFileStream* const cfs = _stream;
1579 unsigned int num_entries = cfs->get_u2(CHECK);
1580
1581 // Each entry is a u2 start_pc, and a u2 line_number
1582 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1583
1584 // Verify line number attribute and table length
1585 guarantee_property(
1586 code_attribute_length == sizeof(u2) + length_in_bytes,
1587 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1588
1589 cfs->guarantee_more(length_in_bytes, CHECK);
1590
1591 if ((*write_stream) == nullptr) {
1592 if (length_in_bytes > fixed_buffer_size) {
1593 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1594 } else {
1595 (*write_stream) = new CompressedLineNumberWriteStream(
1596 _linenumbertable_buffer, fixed_buffer_size);
1597 }
1598 }
1599
1600 while (num_entries-- > 0) {
1601 const u2 bci = cfs->get_u2_fast(); // start_pc
1602 const u2 line = cfs->get_u2_fast(); // line_number
1603 guarantee_property(bci < code_length,
1604 "Invalid pc in LineNumberTable in class file %s", CHECK);
1605 (*write_stream)->write_pair(bci, line);
1606 }
1607 }
1608
1609
1610 class LVT_Hash : public AllStatic {
1611 public:
1612
1613 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1614 /*
1615 * 3-tuple start_bci/length/slot has to be unique key,
1616 * so the following comparison seems to be redundant:
1617 * && elem->name_cp_index == entry->_elem->name_cp_index
1618 */
1619 return (e0.start_bci == e1.start_bci &&
1620 e0.length == e1.length &&
1621 e0.name_cp_index == e1.name_cp_index &&
1622 e0.slot == e1.slot);
1623 }
1624
1625 static unsigned int hash(LocalVariableTableElement const& e0) {
1626 unsigned int raw_hash = e0.start_bci;
1627
1628 raw_hash = e0.length + raw_hash * 37;
1629 raw_hash = e0.name_cp_index + raw_hash * 37;
1630 raw_hash = e0.slot + raw_hash * 37;
1631
1632 return raw_hash;
1633 }
1634 };
1635
1636
1637 // Class file LocalVariableTable elements.
1638 class Classfile_LVT_Element {
1639 public:
1640 u2 start_bci;
1641 u2 length;
1642 u2 name_cp_index;
1643 u2 descriptor_cp_index;
1644 u2 slot;
1645 };
1646
1647 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1648 LocalVariableTableElement* const lvt) {
1649 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1650 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1651 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1652 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1653 lvt->signature_cp_index = 0;
1654 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1655 }
1656
1657 // Function is used to parse both attributes:
1658 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1659 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1660 u4 code_length,
1661 u2 max_locals,
1662 u4 code_attribute_length,
1663 u2* const localvariable_table_length,
1664 bool isLVTT,
1665 TRAPS) {
1666 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1667 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1668 const unsigned int size = checked_cast<unsigned>(
1669 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2));
1670
1671 const ConstantPool* const cp = _cp;
1672
1673 // Verify local variable table attribute has right length
1674 if (_need_verify) {
1675 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1676 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1677 }
1678
1679 const unsafe_u2* const localvariable_table_start = cfs->current();
1680 assert(localvariable_table_start != nullptr, "null local variable table");
1681 if (!_need_verify) {
1682 cfs->skip_u2_fast(size);
1683 } else {
1684 cfs->guarantee_more(size * 2, CHECK_NULL);
1685 for(int i = 0; i < (*localvariable_table_length); i++) {
1686 const u2 start_pc = cfs->get_u2_fast();
1687 const u2 length = cfs->get_u2_fast();
1688 const u2 name_index = cfs->get_u2_fast();
1689 const u2 descriptor_index = cfs->get_u2_fast();
1690 const u2 index = cfs->get_u2_fast();
1691 // Assign to a u4 to avoid overflow
1692 const u4 end_pc = (u4)start_pc + (u4)length;
1693
1694 if (start_pc >= code_length) {
1695 classfile_parse_error(
1696 "Invalid start_pc %u in %s in class file %s",
1697 start_pc, tbl_name, THREAD);
1698 return nullptr;
1699 }
1700 if (end_pc > code_length) {
1701 classfile_parse_error(
1702 "Invalid length %u in %s in class file %s",
1703 length, tbl_name, THREAD);
1704 return nullptr;
1705 }
1706 const int cp_size = cp->length();
1707 guarantee_property(valid_symbol_at(name_index),
1708 "Name index %u in %s has bad constant type in class file %s",
1709 name_index, tbl_name, CHECK_NULL);
1710 guarantee_property(valid_symbol_at(descriptor_index),
1711 "Signature index %u in %s has bad constant type in class file %s",
1712 descriptor_index, tbl_name, CHECK_NULL);
1713
1714 const Symbol* const name = cp->symbol_at(name_index);
1715 const Symbol* const sig = cp->symbol_at(descriptor_index);
1716 verify_legal_field_name(name, CHECK_NULL);
1717 u2 extra_slot = 0;
1718 if (!isLVTT) {
1719 verify_legal_field_signature(name, sig, CHECK_NULL);
1720
1721 // 4894874: check special cases for double and long local variables
1722 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1723 sig == vmSymbols::type_signature(T_LONG)) {
1724 extra_slot = 1;
1725 }
1726 }
1727 guarantee_property((index + extra_slot) < max_locals,
1728 "Invalid index %u in %s in class file %s",
1729 index, tbl_name, CHECK_NULL);
1730 }
1731 }
1732 return localvariable_table_start;
1733 }
1734
1735 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1736 u4 code_attribute_length,
1737 TRAPS) {
1738 assert(cfs != nullptr, "invariant");
1739
1740 if (0 == code_attribute_length) {
1741 return nullptr;
1742 }
1743
1744 const u1* const stackmap_table_start = cfs->current();
1745 assert(stackmap_table_start != nullptr, "null stackmap table");
1746
1747 // check code_attribute_length
1748 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1749
1750 return stackmap_table_start;
1751 }
1752
1753 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1754 u2* const checked_exceptions_length,
1755 u4 method_attribute_length,
1756 TRAPS) {
1757 assert(cfs != nullptr, "invariant");
1758 assert(checked_exceptions_length != nullptr, "invariant");
1759
1760 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1761 *checked_exceptions_length = cfs->get_u2_fast();
1762 const unsigned int size =
1763 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1764 const unsafe_u2* const checked_exceptions_start = cfs->current();
1765 assert(checked_exceptions_start != nullptr, "null checked exceptions");
1766 if (!_need_verify) {
1767 cfs->skip_u2_fast(size);
1768 } else {
1769 // Verify each value in the checked exception table
1770 u2 checked_exception;
1771 const u2 len = *checked_exceptions_length;
1772 cfs->guarantee_more(2 * len, CHECK_NULL);
1773 for (int i = 0; i < len; i++) {
1774 checked_exception = cfs->get_u2_fast();
1775 guarantee_property(
1776 valid_klass_reference_at(checked_exception),
1777 "Exception name has bad type at constant pool %u in class file %s",
1778 checked_exception, CHECK_NULL);
1779 }
1780 }
1781 // check exceptions attribute length
1782 if (_need_verify) {
1783 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1784 sizeof(u2) * size),
1785 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1786 }
1787 return checked_exceptions_start;
1788 }
1789
1790 void ClassFileParser::throwIllegalSignature(const char* type,
1791 const Symbol* name,
1792 const Symbol* sig,
1793 TRAPS) const {
1794 assert(name != nullptr, "invariant");
1795 assert(sig != nullptr, "invariant");
1796
1797 ResourceMark rm(THREAD);
1798 Exceptions::fthrow(THREAD_AND_LOCATION,
1799 vmSymbols::java_lang_ClassFormatError(),
1800 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1801 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1802 }
1803
1804 AnnotationCollector::ID
1805 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1806 const Symbol* name,
1807 const bool can_access_vm_annotations) {
1808 const vmSymbolID sid = vmSymbols::find_sid(name);
1809 // Privileged code can use all annotations. Other code silently drops some.
1810 const bool privileged = loader_data->is_boot_class_loader_data() ||
1811 loader_data->is_platform_class_loader_data() ||
1812 can_access_vm_annotations;
1813 switch (sid) {
1814 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1815 if (_location != _in_method) break; // only allow for methods
1816 if (!privileged) break; // only allow in privileged code
1817 return _method_CallerSensitive;
1818 }
1819 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1820 if (_location != _in_method) break; // only allow for methods
1821 if (!privileged) break; // only allow in privileged code
1822 return _method_ForceInline;
1823 }
1824 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1825 if (_location != _in_method) break; // only allow for methods
1826 if (!privileged) break; // only allow in privileged code
1827 return _method_DontInline;
1828 }
1829 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ChangesCurrentThread_signature): {
1830 if (_location != _in_method) break; // only allow for methods
1831 if (!privileged) break; // only allow in privileged code
1832 return _method_ChangesCurrentThread;
1833 }
1834 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiHideEvents_signature): {
1835 if (_location != _in_method) break; // only allow for methods
1836 if (!privileged) break; // only allow in privileged code
1837 return _method_JvmtiHideEvents;
1838 }
1839 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiMountTransition_signature): {
1840 if (_location != _in_method) break; // only allow for methods
1841 if (!privileged) break; // only allow in privileged code
1842 return _method_JvmtiMountTransition;
1843 }
1844 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1845 if (_location != _in_method) break; // only allow for methods
1846 if (!privileged) break; // only allow in privileged code
1847 return _method_InjectedProfile;
1848 }
1849 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1850 if (_location != _in_method) break; // only allow for methods
1851 if (!privileged) break; // only allow in privileged code
1852 return _method_LambdaForm_Compiled;
1853 }
1854 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
1855 if (_location != _in_method) break; // only allow for methods
1856 if (!privileged) break; // only allow in privileged code
1857 return _method_Hidden;
1858 }
1859 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
1860 if (_location != _in_method) break; // only allow for methods
1861 if (!privileged) break; // only allow in privileged code
1862 return _method_Scoped;
1863 }
1864 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
1865 if (_location != _in_method) break; // only allow for methods
1866 if (!privileged) break; // only allow in privileged code
1867 return _method_IntrinsicCandidate;
1868 }
1869 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
1870 if (_location != _in_field) break; // only allow for fields
1871 if (!privileged) break; // only allow in privileged code
1872 return _field_Stable;
1873 }
1874 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
1875 if (_location != _in_field && _location != _in_class) {
1876 break; // only allow for fields and classes
1877 }
1878 if (!EnableContended || (RestrictContended && !privileged)) {
1879 break; // honor privileges
1880 }
1881 return _jdk_internal_vm_annotation_Contended;
1882 }
1883 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
1884 if (_location != _in_method) break; // only allow for methods
1885 if (RestrictReservedStack && !privileged) break; // honor privileges
1886 return _jdk_internal_vm_annotation_ReservedStackAccess;
1887 }
1888 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
1889 if (_location != _in_class) break; // only allow for classes
1890 if (!privileged) break; // only allow in privileged code
1891 return _jdk_internal_ValueBased;
1892 }
1893 case VM_SYMBOL_ENUM_NAME(java_lang_Deprecated): {
1894 return _java_lang_Deprecated;
1895 }
1896 default: {
1897 break;
1898 }
1899 }
1900 return AnnotationCollector::_unknown;
1901 }
1902
1903 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1904 if (is_contended())
1905 // Setting the contended group also sets the contended bit in field flags
1906 f->set_contended_group(contended_group());
1907 if (is_stable())
1908 (f->field_flags_addr())->update_stable(true);
1909 }
1910
1911 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
1912 // If there's an error deallocate metadata for field annotations
1913 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
1914 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
1915 }
1916
1917 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
1918 if (has_annotation(_method_CallerSensitive))
1919 m->set_caller_sensitive();
1920 if (has_annotation(_method_ForceInline))
1921 m->set_force_inline();
1922 if (has_annotation(_method_DontInline))
1923 m->set_dont_inline();
1924 if (has_annotation(_method_ChangesCurrentThread))
1925 m->set_changes_current_thread();
1926 if (has_annotation(_method_JvmtiHideEvents))
1927 m->set_jvmti_hide_events();
1928 if (has_annotation(_method_JvmtiMountTransition))
1929 m->set_jvmti_mount_transition();
1930 if (has_annotation(_method_InjectedProfile))
1931 m->set_has_injected_profile();
1932 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1933 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1934 if (has_annotation(_method_Hidden))
1935 m->set_is_hidden();
1936 if (has_annotation(_method_Scoped))
1937 m->set_scoped();
1938 if (has_annotation(_method_IntrinsicCandidate) && !m->is_synthetic())
1939 m->set_intrinsic_candidate();
1940 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
1941 m->set_has_reserved_stack_access();
1942 if (has_annotation(_java_lang_Deprecated))
1943 m->set_deprecated();
1944 if (has_annotation(_java_lang_Deprecated_for_removal))
1945 m->set_deprecated_for_removal();
1946 }
1947
1948 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
1949 assert(ik != nullptr, "invariant");
1950 if (has_annotation(_jdk_internal_vm_annotation_Contended)) {
1951 ik->set_is_contended(is_contended());
1952 }
1953 if (has_annotation(_jdk_internal_ValueBased)) {
1954 ik->set_has_value_based_class_annotation();
1955 if (DiagnoseSyncOnValueBasedClasses) {
1956 ik->set_is_value_based();
1957 }
1958 }
1959 if (has_annotation(_java_lang_Deprecated)) {
1960 Array<Method*>* methods = ik->methods();
1961 int length = ik->methods()->length();
1962 for (int i = 0; i < length; i++) {
1963 Method* m = methods->at(i);
1964 m->set_deprecated();
1965 }
1966 }
1967 if (has_annotation(_java_lang_Deprecated_for_removal)) {
1968 Array<Method*>* methods = ik->methods();
1969 int length = ik->methods()->length();
1970 for (int i = 0; i < length; i++) {
1971 Method* m = methods->at(i);
1972 m->set_deprecated_for_removal();
1973 }
1974 }
1975 }
1976
1977 #define MAX_ARGS_SIZE 255
1978 #define MAX_CODE_SIZE 65535
1979 #define INITIAL_MAX_LVT_NUMBER 256
1980
1981 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1982 *
1983 * Rules for LVT's and LVTT's are:
1984 * - There can be any number of LVT's and LVTT's.
1985 * - If there are n LVT's, it is the same as if there was just
1986 * one LVT containing all the entries from the n LVT's.
1987 * - There may be no more than one LVT entry per local variable.
1988 * Two LVT entries are 'equal' if these fields are the same:
1989 * start_pc, length, name, slot
1990 * - There may be no more than one LVTT entry per each LVT entry.
1991 * Each LVTT entry has to match some LVT entry.
1992 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
1993 */
1994 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
1995 int lvt_cnt,
1996 u2* const localvariable_table_length,
1997 const unsafe_u2** const localvariable_table_start,
1998 int lvtt_cnt,
1999 u2* const localvariable_type_table_length,
2000 const unsafe_u2** const localvariable_type_table_start,
2001 TRAPS) {
2002
2003 ResourceMark rm(THREAD);
2004
2005 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2006 256, AnyObj::RESOURCE_AREA, mtInternal,
2007 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2008
2009 LVT_HashTable* const table = new LVT_HashTable();
2010
2011 // To fill LocalVariableTable in
2012 const Classfile_LVT_Element* cf_lvt;
2013 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2014
2015 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2016 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2017 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2018 copy_lvt_element(&cf_lvt[idx], lvt);
2019 // If no duplicates, add LVT elem in hashtable.
2020 if (table->put(*lvt, lvt) == false
2021 && _need_verify
2022 && _major_version >= JAVA_1_5_VERSION) {
2023 classfile_parse_error("Duplicated LocalVariableTable attribute "
2024 "entry for '%s' in class file %s",
2025 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2026 THREAD);
2027 return;
2028 }
2029 }
2030 }
2031
2032 // To merge LocalVariableTable and LocalVariableTypeTable
2033 const Classfile_LVT_Element* cf_lvtt;
2034 LocalVariableTableElement lvtt_elem;
2035
2036 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2037 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2038 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2039 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2040 LocalVariableTableElement** entry = table->get(lvtt_elem);
2041 if (entry == nullptr) {
2042 if (_need_verify) {
2043 classfile_parse_error("LVTT entry for '%s' in class file %s "
2044 "does not match any LVT entry",
2045 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2046 THREAD);
2047 return;
2048 }
2049 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2050 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2051 "entry for '%s' in class file %s",
2052 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2053 THREAD);
2054 return;
2055 } else {
2056 // to add generic signatures into LocalVariableTable
2057 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2058 }
2059 }
2060 }
2061 }
2062
2063
2064 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2065 const u1* runtime_visible_annotations,
2066 int runtime_visible_annotations_length,
2067 const u1* runtime_visible_parameter_annotations,
2068 int runtime_visible_parameter_annotations_length,
2069 const u1* runtime_visible_type_annotations,
2070 int runtime_visible_type_annotations_length,
2071 const u1* annotation_default,
2072 int annotation_default_length,
2073 TRAPS) {
2074
2075 AnnotationArray* a;
2076
2077 if (runtime_visible_annotations_length > 0) {
2078 a = allocate_annotations(runtime_visible_annotations,
2079 runtime_visible_annotations_length,
2080 CHECK);
2081 cm->set_method_annotations(a);
2082 }
2083
2084 if (runtime_visible_parameter_annotations_length > 0) {
2085 a = allocate_annotations(runtime_visible_parameter_annotations,
2086 runtime_visible_parameter_annotations_length,
2087 CHECK);
2088 cm->set_parameter_annotations(a);
2089 }
2090
2091 if (annotation_default_length > 0) {
2092 a = allocate_annotations(annotation_default,
2093 annotation_default_length,
2094 CHECK);
2095 cm->set_default_annotations(a);
2096 }
2097
2098 if (runtime_visible_type_annotations_length > 0) {
2099 a = allocate_annotations(runtime_visible_type_annotations,
2100 runtime_visible_type_annotations_length,
2101 CHECK);
2102 cm->set_type_annotations(a);
2103 }
2104 }
2105
2106
2107 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2108 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2109 // Method* to save footprint, so we only know the size of the resulting Method* when the
2110 // entire method attribute is parsed.
2111 //
2112 // The has_localvariable_table parameter is used to pass up the value to InstanceKlass.
2113
2114 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2115 bool is_interface,
2116 const ConstantPool* cp,
2117 bool* const has_localvariable_table,
2118 TRAPS) {
2119 assert(cfs != nullptr, "invariant");
2120 assert(cp != nullptr, "invariant");
2121 assert(has_localvariable_table != nullptr, "invariant");
2122
2123 ResourceMark rm(THREAD);
2124 // Parse fixed parts:
2125 // access_flags, name_index, descriptor_index, attributes_count
2126 cfs->guarantee_more(8, CHECK_NULL);
2127
2128 int flags = cfs->get_u2_fast();
2129 const u2 name_index = cfs->get_u2_fast();
2130 const int cp_size = cp->length();
2131 guarantee_property(
2132 valid_symbol_at(name_index),
2133 "Illegal constant pool index %u for method name in class file %s",
2134 name_index, CHECK_NULL);
2135 const Symbol* const name = cp->symbol_at(name_index);
2136 verify_legal_method_name(name, CHECK_NULL);
2137
2138 const u2 signature_index = cfs->get_u2_fast();
2139 guarantee_property(
2140 valid_symbol_at(signature_index),
2141 "Illegal constant pool index %u for method signature in class file %s",
2142 signature_index, CHECK_NULL);
2143 const Symbol* const signature = cp->symbol_at(signature_index);
2144
2145 if (name == vmSymbols::class_initializer_name()) {
2146 // We ignore the other access flags for a valid class initializer.
2147 // (JVM Spec 2nd ed., chapter 4.6)
2148 if (_major_version < 51) { // backward compatibility
2149 flags = JVM_ACC_STATIC;
2150 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2151 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2152 } else {
2153 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2154 return nullptr;
2155 }
2156 } else {
2157 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2158 }
2159
2160 if (name == vmSymbols::object_initializer_name() && is_interface) {
2161 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2162 return nullptr;
2163 }
2164
2165 int args_size = -1; // only used when _need_verify is true
2166 if (_need_verify) {
2167 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2168 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2169 verify_legal_method_signature(name, signature, CHECK_NULL);
2170 if (args_size > MAX_ARGS_SIZE) {
2171 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2172 return nullptr;
2173 }
2174 }
2175
2176 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2177
2178 // Default values for code and exceptions attribute elements
2179 u2 max_stack = 0;
2180 u2 max_locals = 0;
2181 u4 code_length = 0;
2182 const u1* code_start = nullptr;
2183 u2 exception_table_length = 0;
2184 const unsafe_u2* exception_table_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2185 Array<int>* exception_handlers = Universe::the_empty_int_array();
2186 u2 checked_exceptions_length = 0;
2187 const unsafe_u2* checked_exceptions_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2188 CompressedLineNumberWriteStream* linenumber_table = nullptr;
2189 int linenumber_table_length = 0;
2190 int total_lvt_length = 0;
2191 u2 lvt_cnt = 0;
2192 u2 lvtt_cnt = 0;
2193 bool lvt_allocated = false;
2194 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2195 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2196 u2* localvariable_table_length = nullptr;
2197 const unsafe_u2** localvariable_table_start = nullptr; // (potentially unaligned) pointer to array of LVT attributes
2198 u2* localvariable_type_table_length = nullptr;
2199 const unsafe_u2** localvariable_type_table_start = nullptr; // (potentially unaligned) pointer to LVTT attributes
2200 int method_parameters_length = -1;
2201 const u1* method_parameters_data = nullptr;
2202 bool method_parameters_seen = false;
2203 bool parsed_code_attribute = false;
2204 bool parsed_checked_exceptions_attribute = false;
2205 bool parsed_stackmap_attribute = false;
2206 // stackmap attribute - JDK1.5
2207 const u1* stackmap_data = nullptr;
2208 int stackmap_data_length = 0;
2209 u2 generic_signature_index = 0;
2210 MethodAnnotationCollector parsed_annotations;
2211 const u1* runtime_visible_annotations = nullptr;
2212 int runtime_visible_annotations_length = 0;
2213 const u1* runtime_visible_parameter_annotations = nullptr;
2214 int runtime_visible_parameter_annotations_length = 0;
2215 const u1* runtime_visible_type_annotations = nullptr;
2216 int runtime_visible_type_annotations_length = 0;
2217 bool runtime_invisible_annotations_exists = false;
2218 bool runtime_invisible_type_annotations_exists = false;
2219 bool runtime_invisible_parameter_annotations_exists = false;
2220 const u1* annotation_default = nullptr;
2221 int annotation_default_length = 0;
2222
2223 // Parse code and exceptions attribute
2224 u2 method_attributes_count = cfs->get_u2_fast();
2225 while (method_attributes_count--) {
2226 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2227 const u2 method_attribute_name_index = cfs->get_u2_fast();
2228 const u4 method_attribute_length = cfs->get_u4_fast();
2229 guarantee_property(
2230 valid_symbol_at(method_attribute_name_index),
2231 "Invalid method attribute name index %u in class file %s",
2232 method_attribute_name_index, CHECK_NULL);
2233
2234 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2235 if (method_attribute_name == vmSymbols::tag_code()) {
2236 // Parse Code attribute
2237 if (_need_verify) {
2238 guarantee_property(
2239 !access_flags.is_native() && !access_flags.is_abstract(),
2240 "Code attribute in native or abstract methods in class file %s",
2241 CHECK_NULL);
2242 }
2243 if (parsed_code_attribute) {
2244 classfile_parse_error("Multiple Code attributes in class file %s",
2245 THREAD);
2246 return nullptr;
2247 }
2248 parsed_code_attribute = true;
2249
2250 // Stack size, locals size, and code size
2251 cfs->guarantee_more(8, CHECK_NULL);
2252 max_stack = cfs->get_u2_fast();
2253 max_locals = cfs->get_u2_fast();
2254 code_length = cfs->get_u4_fast();
2255 if (_need_verify) {
2256 guarantee_property(args_size <= max_locals,
2257 "Arguments can't fit into locals in class file %s",
2258 CHECK_NULL);
2259 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2260 "Invalid method Code length %u in class file %s",
2261 code_length, CHECK_NULL);
2262 }
2263 // Code pointer
2264 code_start = cfs->current();
2265 assert(code_start != nullptr, "null code start");
2266 cfs->guarantee_more(code_length, CHECK_NULL);
2267 cfs->skip_u1_fast(code_length);
2268
2269 // Exception handler table
2270 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2271 exception_table_length = cfs->get_u2_fast();
2272 if (exception_table_length > 0) {
2273 exception_table_start = parse_exception_table(cfs,
2274 code_length,
2275 exception_table_length,
2276 CHECK_NULL);
2277 }
2278
2279 // Parse additional attributes in code attribute
2280 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2281 u2 code_attributes_count = cfs->get_u2_fast();
2282
2283 unsigned int calculated_attribute_length = 0;
2284
2285 calculated_attribute_length =
2286 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2287 calculated_attribute_length += checked_cast<unsigned int>(
2288 code_length +
2289 sizeof(exception_table_length) +
2290 sizeof(code_attributes_count) +
2291 exception_table_length *
2292 ( sizeof(u2) + // start_pc
2293 sizeof(u2) + // end_pc
2294 sizeof(u2) + // handler_pc
2295 sizeof(u2) )); // catch_type_index
2296
2297 while (code_attributes_count--) {
2298 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2299 const u2 code_attribute_name_index = cfs->get_u2_fast();
2300 const u4 code_attribute_length = cfs->get_u4_fast();
2301 calculated_attribute_length += code_attribute_length +
2302 (unsigned)sizeof(code_attribute_name_index) +
2303 (unsigned)sizeof(code_attribute_length);
2304 guarantee_property(valid_symbol_at(code_attribute_name_index),
2305 "Invalid code attribute name index %u in class file %s",
2306 code_attribute_name_index,
2307 CHECK_NULL);
2308 if (LoadLineNumberTables &&
2309 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2310 // Parse and compress line number table
2311 parse_linenumber_table(code_attribute_length,
2312 code_length,
2313 &linenumber_table,
2314 CHECK_NULL);
2315
2316 } else if (LoadLocalVariableTables &&
2317 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2318 // Parse local variable table
2319 if (!lvt_allocated) {
2320 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2321 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2322 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2323 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2324 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2325 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2326 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2327 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2328 lvt_allocated = true;
2329 }
2330 if (lvt_cnt == max_lvt_cnt) {
2331 max_lvt_cnt <<= 1;
2332 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2333 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2334 }
2335 localvariable_table_start[lvt_cnt] =
2336 parse_localvariable_table(cfs,
2337 code_length,
2338 max_locals,
2339 code_attribute_length,
2340 &localvariable_table_length[lvt_cnt],
2341 false, // is not LVTT
2342 CHECK_NULL);
2343 total_lvt_length += localvariable_table_length[lvt_cnt];
2344 lvt_cnt++;
2345 } else if (LoadLocalVariableTypeTables &&
2346 _major_version >= JAVA_1_5_VERSION &&
2347 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2348 if (!lvt_allocated) {
2349 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2350 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2351 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2352 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2353 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2354 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2355 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2356 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2357 lvt_allocated = true;
2358 }
2359 // Parse local variable type table
2360 if (lvtt_cnt == max_lvtt_cnt) {
2361 max_lvtt_cnt <<= 1;
2362 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2363 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2364 }
2365 localvariable_type_table_start[lvtt_cnt] =
2366 parse_localvariable_table(cfs,
2367 code_length,
2368 max_locals,
2369 code_attribute_length,
2370 &localvariable_type_table_length[lvtt_cnt],
2371 true, // is LVTT
2372 CHECK_NULL);
2373 lvtt_cnt++;
2374 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2375 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2376 // Stack map is only needed by the new verifier in JDK1.5.
2377 if (parsed_stackmap_attribute) {
2378 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2379 return nullptr;
2380 }
2381 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, CHECK_NULL);
2382 stackmap_data_length = code_attribute_length;
2383 parsed_stackmap_attribute = true;
2384 } else {
2385 // Skip unknown attributes
2386 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2387 }
2388 }
2389 // check method attribute length
2390 if (_need_verify) {
2391 guarantee_property(method_attribute_length == calculated_attribute_length,
2392 "Code segment has wrong length in class file %s",
2393 CHECK_NULL);
2394 }
2395 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2396 // Parse Exceptions attribute
2397 if (parsed_checked_exceptions_attribute) {
2398 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2399 THREAD);
2400 return nullptr;
2401 }
2402 parsed_checked_exceptions_attribute = true;
2403 checked_exceptions_start =
2404 parse_checked_exceptions(cfs,
2405 &checked_exceptions_length,
2406 method_attribute_length,
2407 CHECK_NULL);
2408 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2409 // reject multiple method parameters
2410 if (method_parameters_seen) {
2411 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2412 THREAD);
2413 return nullptr;
2414 }
2415 method_parameters_seen = true;
2416 method_parameters_length = cfs->get_u1_fast();
2417 const u4 real_length = (method_parameters_length * 4u) + 1u;
2418 if (method_attribute_length != real_length) {
2419 classfile_parse_error(
2420 "Invalid MethodParameters method attribute length %u in class file",
2421 method_attribute_length, THREAD);
2422 return nullptr;
2423 }
2424 method_parameters_data = cfs->current();
2425 cfs->skip_u2_fast(method_parameters_length);
2426 cfs->skip_u2_fast(method_parameters_length);
2427 // ignore this attribute if it cannot be reflected
2428 if (!vmClasses::Parameter_klass_loaded())
2429 method_parameters_length = -1;
2430 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2431 if (method_attribute_length != 0) {
2432 classfile_parse_error(
2433 "Invalid Synthetic method attribute length %u in class file %s",
2434 method_attribute_length, THREAD);
2435 return nullptr;
2436 }
2437 // Should we check that there hasn't already been a synthetic attribute?
2438 access_flags.set_is_synthetic();
2439 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2440 if (method_attribute_length != 0) {
2441 classfile_parse_error(
2442 "Invalid Deprecated method attribute length %u in class file %s",
2443 method_attribute_length, THREAD);
2444 return nullptr;
2445 }
2446 } else if (_major_version >= JAVA_1_5_VERSION) {
2447 if (method_attribute_name == vmSymbols::tag_signature()) {
2448 if (generic_signature_index != 0) {
2449 classfile_parse_error(
2450 "Multiple Signature attributes for method in class file %s",
2451 THREAD);
2452 return nullptr;
2453 }
2454 if (method_attribute_length != 2) {
2455 classfile_parse_error(
2456 "Invalid Signature attribute length %u in class file %s",
2457 method_attribute_length, THREAD);
2458 return nullptr;
2459 }
2460 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2461 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2462 if (runtime_visible_annotations != nullptr) {
2463 classfile_parse_error(
2464 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2465 THREAD);
2466 return nullptr;
2467 }
2468 runtime_visible_annotations_length = method_attribute_length;
2469 runtime_visible_annotations = cfs->current();
2470 assert(runtime_visible_annotations != nullptr, "null visible annotations");
2471 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2472 parse_annotations(cp,
2473 runtime_visible_annotations,
2474 runtime_visible_annotations_length,
2475 &parsed_annotations,
2476 _loader_data,
2477 _can_access_vm_annotations);
2478 cfs->skip_u1_fast(runtime_visible_annotations_length);
2479 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2480 if (runtime_invisible_annotations_exists) {
2481 classfile_parse_error(
2482 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2483 THREAD);
2484 return nullptr;
2485 }
2486 runtime_invisible_annotations_exists = true;
2487 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2488 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2489 if (runtime_visible_parameter_annotations != nullptr) {
2490 classfile_parse_error(
2491 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2492 THREAD);
2493 return nullptr;
2494 }
2495 runtime_visible_parameter_annotations_length = method_attribute_length;
2496 runtime_visible_parameter_annotations = cfs->current();
2497 assert(runtime_visible_parameter_annotations != nullptr, "null visible parameter annotations");
2498 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2499 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2500 if (runtime_invisible_parameter_annotations_exists) {
2501 classfile_parse_error(
2502 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2503 THREAD);
2504 return nullptr;
2505 }
2506 runtime_invisible_parameter_annotations_exists = true;
2507 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2508 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2509 if (annotation_default != nullptr) {
2510 classfile_parse_error(
2511 "Multiple AnnotationDefault attributes for method in class file %s",
2512 THREAD);
2513 return nullptr;
2514 }
2515 annotation_default_length = method_attribute_length;
2516 annotation_default = cfs->current();
2517 assert(annotation_default != nullptr, "null annotation default");
2518 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2519 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2520 if (runtime_visible_type_annotations != nullptr) {
2521 classfile_parse_error(
2522 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2523 THREAD);
2524 return nullptr;
2525 }
2526 runtime_visible_type_annotations_length = method_attribute_length;
2527 runtime_visible_type_annotations = cfs->current();
2528 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
2529 // No need for the VM to parse Type annotations
2530 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2531 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2532 if (runtime_invisible_type_annotations_exists) {
2533 classfile_parse_error(
2534 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2535 THREAD);
2536 return nullptr;
2537 }
2538 runtime_invisible_type_annotations_exists = true;
2539 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2540 } else {
2541 // Skip unknown attributes
2542 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2543 }
2544 } else {
2545 // Skip unknown attributes
2546 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2547 }
2548 }
2549
2550 if (linenumber_table != nullptr) {
2551 linenumber_table->write_terminator();
2552 linenumber_table_length = linenumber_table->position();
2553 }
2554
2555 // Make sure there's at least one Code attribute in non-native/non-abstract method
2556 if (_need_verify) {
2557 guarantee_property(access_flags.is_native() ||
2558 access_flags.is_abstract() ||
2559 parsed_code_attribute,
2560 "Absent Code attribute in method that is not native or abstract in class file %s",
2561 CHECK_NULL);
2562 }
2563
2564 // All sizing information for a Method* is finally available, now create it
2565 InlineTableSizes sizes(
2566 total_lvt_length,
2567 linenumber_table_length,
2568 exception_table_length,
2569 checked_exceptions_length,
2570 method_parameters_length,
2571 generic_signature_index,
2572 runtime_visible_annotations_length,
2573 runtime_visible_parameter_annotations_length,
2574 runtime_visible_type_annotations_length,
2575 annotation_default_length,
2576 0);
2577
2578 Method* const m = Method::allocate(_loader_data,
2579 code_length,
2580 access_flags,
2581 &sizes,
2582 ConstMethod::NORMAL,
2583 _cp->symbol_at(name_index),
2584 CHECK_NULL);
2585
2586 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2587
2588 // Fill in information from fixed part (access_flags already set)
2589 m->set_constants(_cp);
2590 m->set_name_index(name_index);
2591 m->set_signature_index(signature_index);
2592 m->constMethod()->compute_from_signature(cp->symbol_at(signature_index), access_flags.is_static());
2593 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2594
2595 // Fill in code attribute information
2596 m->set_max_stack(max_stack);
2597 m->set_max_locals(max_locals);
2598 if (stackmap_data != nullptr) {
2599 m->constMethod()->copy_stackmap_data(_loader_data,
2600 (u1*)stackmap_data,
2601 stackmap_data_length,
2602 CHECK_NULL);
2603 }
2604
2605 // Copy byte codes
2606 m->set_code((u1*)code_start);
2607
2608 // Copy line number table
2609 if (linenumber_table != nullptr) {
2610 memcpy(m->compressed_linenumber_table(),
2611 linenumber_table->buffer(),
2612 linenumber_table_length);
2613 }
2614
2615 // Copy exception table
2616 if (exception_table_length > 0) {
2617 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2618 m->exception_table_start(),
2619 exception_table_length * sizeof(ExceptionTableElement),
2620 sizeof(u2));
2621 }
2622
2623 // Copy method parameters
2624 if (method_parameters_length > 0) {
2625 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2626 for (int i = 0; i < method_parameters_length; i++) {
2627 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2628 method_parameters_data += 2;
2629 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2630 method_parameters_data += 2;
2631 }
2632 }
2633
2634 // Copy checked exceptions
2635 if (checked_exceptions_length > 0) {
2636 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2637 m->checked_exceptions_start(),
2638 checked_exceptions_length * sizeof(CheckedExceptionElement),
2639 sizeof(u2));
2640 }
2641
2642 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2643 if (total_lvt_length > 0) {
2644 *has_localvariable_table = true;
2645 copy_localvariable_table(m->constMethod(),
2646 lvt_cnt,
2647 localvariable_table_length,
2648 localvariable_table_start,
2649 lvtt_cnt,
2650 localvariable_type_table_length,
2651 localvariable_type_table_start,
2652 CHECK_NULL);
2653 }
2654
2655 if (parsed_annotations.has_any_annotations())
2656 parsed_annotations.apply_to(methodHandle(THREAD, m));
2657
2658 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2659 m->set_is_hidden();
2660 }
2661
2662 // Copy annotations
2663 copy_method_annotations(m->constMethod(),
2664 runtime_visible_annotations,
2665 runtime_visible_annotations_length,
2666 runtime_visible_parameter_annotations,
2667 runtime_visible_parameter_annotations_length,
2668 runtime_visible_type_annotations,
2669 runtime_visible_type_annotations_length,
2670 annotation_default,
2671 annotation_default_length,
2672 CHECK_NULL);
2673
2674 if (InstanceKlass::is_finalization_enabled() &&
2675 name == vmSymbols::finalize_method_name() &&
2676 signature == vmSymbols::void_method_signature()) {
2677 if (m->is_empty_method()) {
2678 _has_empty_finalizer = true;
2679 } else {
2680 _has_finalizer = true;
2681 }
2682 }
2683
2684 NOT_PRODUCT(m->verify());
2685 return m;
2686 }
2687
2688
2689 // Side-effects: populates the _methods field in the parser
2690 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2691 bool is_interface,
2692 bool* const has_localvariable_table,
2693 bool* has_final_method,
2694 bool* declares_nonstatic_concrete_methods,
2695 TRAPS) {
2696 assert(cfs != nullptr, "invariant");
2697 assert(has_localvariable_table != nullptr, "invariant");
2698 assert(has_final_method != nullptr, "invariant");
2699 assert(declares_nonstatic_concrete_methods != nullptr, "invariant");
2700
2701 assert(nullptr == _methods, "invariant");
2702
2703 cfs->guarantee_more(2, CHECK); // length
2704 const u2 length = cfs->get_u2_fast();
2705 if (length == 0) {
2706 _methods = Universe::the_empty_method_array();
2707 } else {
2708 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2709 length,
2710 nullptr,
2711 CHECK);
2712
2713 for (int index = 0; index < length; index++) {
2714 Method* method = parse_method(cfs,
2715 is_interface,
2716 _cp,
2717 has_localvariable_table,
2718 CHECK);
2719
2720 if (method->is_final()) {
2721 *has_final_method = true;
2722 }
2723 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2724 // used for interface initialization, and default method inheritance analysis
2725 if (is_interface && !(*declares_nonstatic_concrete_methods)
2726 && !method->is_abstract() && !method->is_static()) {
2727 *declares_nonstatic_concrete_methods = true;
2728 }
2729 _methods->at_put(index, method);
2730 }
2731
2732 if (_need_verify && length > 1) {
2733 // Check duplicated methods
2734 ResourceMark rm(THREAD);
2735 // Set containing name-signature pairs
2736 NameSigHashtable* names_and_sigs = new NameSigHashtable();
2737 for (int i = 0; i < length; i++) {
2738 const Method* const m = _methods->at(i);
2739 NameSigHash name_and_sig(m->name(), m->signature());
2740 // If no duplicates, add name/signature in hashtable names_and_sigs.
2741 if(!names_and_sigs->put(name_and_sig, 0)) {
2742 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2743 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
2744 return;
2745 }
2746 }
2747 }
2748 }
2749 }
2750
2751 static const intArray* sort_methods(Array<Method*>* methods) {
2752 const int length = methods->length();
2753 // If JVMTI original method ordering or sharing is enabled we have to
2754 // remember the original class file ordering.
2755 // We temporarily use the vtable_index field in the Method* to store the
2756 // class file index, so we can read in after calling qsort.
2757 // Put the method ordering in the shared archive.
2758 if (JvmtiExport::can_maintain_original_method_order() || CDSConfig::is_dumping_archive()) {
2759 for (int index = 0; index < length; index++) {
2760 Method* const m = methods->at(index);
2761 assert(!m->valid_vtable_index(), "vtable index should not be set");
2762 m->set_vtable_index(index);
2763 }
2764 }
2765 // Sort method array by ascending method name (for faster lookups & vtable construction)
2766 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2767 Method::sort_methods(methods);
2768
2769 intArray* method_ordering = nullptr;
2770 // If JVMTI original method ordering or sharing is enabled construct int
2771 // array remembering the original ordering
2772 if (JvmtiExport::can_maintain_original_method_order() || CDSConfig::is_dumping_archive()) {
2773 method_ordering = new intArray(length, length, -1);
2774 for (int index = 0; index < length; index++) {
2775 Method* const m = methods->at(index);
2776 const int old_index = m->vtable_index();
2777 assert(old_index >= 0 && old_index < length, "invalid method index");
2778 method_ordering->at_put(index, old_index);
2779 m->set_vtable_index(Method::invalid_vtable_index);
2780 }
2781 }
2782 return method_ordering;
2783 }
2784
2785 // Parse generic_signature attribute for methods and fields
2786 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2787 TRAPS) {
2788 assert(cfs != nullptr, "invariant");
2789
2790 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2791 const u2 generic_signature_index = cfs->get_u2_fast();
2792 guarantee_property(
2793 valid_symbol_at(generic_signature_index),
2794 "Invalid Signature attribute at constant pool index %u in class file %s",
2795 generic_signature_index, CHECK_0);
2796 return generic_signature_index;
2797 }
2798
2799 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2800 TRAPS) {
2801
2802 assert(cfs != nullptr, "invariant");
2803
2804 cfs->guarantee_more(2, CHECK); // sourcefile_index
2805 const u2 sourcefile_index = cfs->get_u2_fast();
2806 guarantee_property(
2807 valid_symbol_at(sourcefile_index),
2808 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2809 sourcefile_index, CHECK);
2810 set_class_sourcefile_index(sourcefile_index);
2811 }
2812
2813 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2814 int length,
2815 TRAPS) {
2816 assert(cfs != nullptr, "invariant");
2817
2818 const u1* const sde_buffer = cfs->current();
2819 assert(sde_buffer != nullptr, "null sde buffer");
2820
2821 // Don't bother storing it if there is no way to retrieve it
2822 if (JvmtiExport::can_get_source_debug_extension()) {
2823 assert((length+1) > length, "Overflow checking");
2824 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2825 for (int i = 0; i < length; i++) {
2826 sde[i] = sde_buffer[i];
2827 }
2828 sde[length] = '\0';
2829 set_class_sde_buffer((const char*)sde, length);
2830 }
2831 // Got utf8 string, set stream position forward
2832 cfs->skip_u1(length, CHECK);
2833 }
2834
2835
2836 // Inner classes can be static, private or protected (classic VM does this)
2837 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2838 JVM_ACC_PRIVATE | \
2839 JVM_ACC_PROTECTED | \
2840 JVM_ACC_STATIC \
2841 )
2842
2843 // Find index of the InnerClasses entry for the specified inner_class_info_index.
2844 // Return -1 if none is found.
2845 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
2846 Symbol* cp_klass_name = cp->klass_name_at(inner);
2847 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
2848 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
2849 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
2850 return idx;
2851 }
2852 }
2853 return -1;
2854 }
2855
2856 // Return the outer_class_info_index for the InnerClasses entry containing the
2857 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
2858 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
2859 if (inner == 0) return -1;
2860 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
2861 if (idx == -1) return -1;
2862 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
2863 return result;
2864 }
2865
2866 // Return true if circularity is found, false if no circularity is found.
2867 // Use Floyd's cycle finding algorithm.
2868 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
2869 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
2870 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
2871
2872 while (fast != -1 && fast != 0) {
2873 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
2874 return true; // found a circularity
2875 }
2876 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
2877 if (fast == -1) return false;
2878 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
2879 if (fast == -1) return false;
2880 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
2881 assert(slow != -1, "sanity check");
2882 }
2883 return false;
2884 }
2885
2886 // Loop through each InnerClasses entry checking for circularities and duplications
2887 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
2888 // return true if a circularity or entries with duplicate inner_class_info_indexes
2889 // are found.
2890 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
2891 // Loop through each InnerClasses entry.
2892 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
2893 // Return true if there are circular entries.
2894 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
2895 return true;
2896 }
2897 // Check if there are duplicate entries or entries with the same inner_class_info_index.
2898 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
2899 y += InstanceKlass::inner_class_next_offset) {
2900
2901 // 4347400: make sure there's no duplicate entry in the classes array
2902 if (_major_version >= JAVA_1_5_VERSION) {
2903 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
2904 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
2905 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
2906 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
2907 "Duplicate entry in InnerClasses attribute in class file %s",
2908 CHECK_(true));
2909 }
2910 // Return true if there are two entries with the same inner_class_info_index.
2911 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
2912 return true;
2913 }
2914 }
2915 }
2916 return false;
2917 }
2918
2919 // Return number of classes in the inner classes attribute table
2920 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
2921 const ConstantPool* cp,
2922 const u1* const inner_classes_attribute_start,
2923 bool parsed_enclosingmethod_attribute,
2924 u2 enclosing_method_class_index,
2925 u2 enclosing_method_method_index,
2926 TRAPS) {
2927 const u1* const current_mark = cfs->current();
2928 u2 length = 0;
2929 if (inner_classes_attribute_start != nullptr) {
2930 cfs->set_current(inner_classes_attribute_start);
2931 cfs->guarantee_more(2, CHECK_0); // length
2932 length = cfs->get_u2_fast();
2933 }
2934
2935 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2936 // method data:
2937 // [inner_class_info_index,
2938 // outer_class_info_index,
2939 // inner_name_index,
2940 // inner_class_access_flags,
2941 // ...
2942 // enclosing_method_class_index,
2943 // enclosing_method_method_index]
2944 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2945 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
2946 _inner_classes = inner_classes;
2947
2948 int index = 0;
2949 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2950 for (int n = 0; n < length; n++) {
2951 // Inner class index
2952 const u2 inner_class_info_index = cfs->get_u2_fast();
2953 guarantee_property(
2954 valid_klass_reference_at(inner_class_info_index),
2955 "inner_class_info_index %u has bad constant type in class file %s",
2956 inner_class_info_index, CHECK_0);
2957 // Outer class index
2958 const u2 outer_class_info_index = cfs->get_u2_fast();
2959 guarantee_property(
2960 outer_class_info_index == 0 ||
2961 valid_klass_reference_at(outer_class_info_index),
2962 "outer_class_info_index %u has bad constant type in class file %s",
2963 outer_class_info_index, CHECK_0);
2964
2965 if (outer_class_info_index != 0) {
2966 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
2967 char* bytes = (char*)outer_class_name->bytes();
2968 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
2969 "Outer class is an array class in class file %s", CHECK_0);
2970 }
2971 // Inner class name
2972 const u2 inner_name_index = cfs->get_u2_fast();
2973 guarantee_property(
2974 inner_name_index == 0 || valid_symbol_at(inner_name_index),
2975 "inner_name_index %u has bad constant type in class file %s",
2976 inner_name_index, CHECK_0);
2977 if (_need_verify) {
2978 guarantee_property(inner_class_info_index != outer_class_info_index,
2979 "Class is both outer and inner class in class file %s", CHECK_0);
2980 }
2981 // Access flags
2982 jint flags;
2983 // JVM_ACC_MODULE is defined in JDK-9 and later.
2984 if (_major_version >= JAVA_9_VERSION) {
2985 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
2986 } else {
2987 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2988 }
2989 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2990 // Set abstract bit for old class files for backward compatibility
2991 flags |= JVM_ACC_ABSTRACT;
2992 }
2993 verify_legal_class_modifiers(flags, CHECK_0);
2994 AccessFlags inner_access_flags(flags);
2995
2996 inner_classes->at_put(index++, inner_class_info_index);
2997 inner_classes->at_put(index++, outer_class_info_index);
2998 inner_classes->at_put(index++, inner_name_index);
2999 inner_classes->at_put(index++, inner_access_flags.as_short());
3000 }
3001
3002 // Check for circular and duplicate entries.
3003 bool has_circularity = false;
3004 if (_need_verify) {
3005 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3006 if (has_circularity) {
3007 // If circularity check failed then ignore InnerClasses attribute.
3008 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3009 index = 0;
3010 if (parsed_enclosingmethod_attribute) {
3011 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3012 _inner_classes = inner_classes;
3013 } else {
3014 _inner_classes = Universe::the_empty_short_array();
3015 }
3016 }
3017 }
3018 // Set EnclosingMethod class and method indexes.
3019 if (parsed_enclosingmethod_attribute) {
3020 inner_classes->at_put(index++, enclosing_method_class_index);
3021 inner_classes->at_put(index++, enclosing_method_method_index);
3022 }
3023 assert(index == size || has_circularity, "wrong size");
3024
3025 // Restore buffer's current position.
3026 cfs->set_current(current_mark);
3027
3028 return length;
3029 }
3030
3031 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3032 const u1* const nest_members_attribute_start,
3033 TRAPS) {
3034 const u1* const current_mark = cfs->current();
3035 u2 length = 0;
3036 if (nest_members_attribute_start != nullptr) {
3037 cfs->set_current(nest_members_attribute_start);
3038 cfs->guarantee_more(2, CHECK_0); // length
3039 length = cfs->get_u2_fast();
3040 }
3041 const int size = length;
3042 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3043 _nest_members = nest_members;
3044
3045 int index = 0;
3046 cfs->guarantee_more(2 * length, CHECK_0);
3047 for (int n = 0; n < length; n++) {
3048 const u2 class_info_index = cfs->get_u2_fast();
3049 guarantee_property(
3050 valid_klass_reference_at(class_info_index),
3051 "Nest member class_info_index %u has bad constant type in class file %s",
3052 class_info_index, CHECK_0);
3053 nest_members->at_put(index++, class_info_index);
3054 }
3055 assert(index == size, "wrong size");
3056
3057 // Restore buffer's current position.
3058 cfs->set_current(current_mark);
3059
3060 return length;
3061 }
3062
3063 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3064 const u1* const permitted_subclasses_attribute_start,
3065 TRAPS) {
3066 const u1* const current_mark = cfs->current();
3067 u2 length = 0;
3068 if (permitted_subclasses_attribute_start != nullptr) {
3069 cfs->set_current(permitted_subclasses_attribute_start);
3070 cfs->guarantee_more(2, CHECK_0); // length
3071 length = cfs->get_u2_fast();
3072 }
3073 const int size = length;
3074 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3075 _permitted_subclasses = permitted_subclasses;
3076
3077 if (length > 0) {
3078 int index = 0;
3079 cfs->guarantee_more(2 * length, CHECK_0);
3080 for (int n = 0; n < length; n++) {
3081 const u2 class_info_index = cfs->get_u2_fast();
3082 guarantee_property(
3083 valid_klass_reference_at(class_info_index),
3084 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3085 class_info_index, CHECK_0);
3086 permitted_subclasses->at_put(index++, class_info_index);
3087 }
3088 assert(index == size, "wrong size");
3089 }
3090
3091 // Restore buffer's current position.
3092 cfs->set_current(current_mark);
3093
3094 return length;
3095 }
3096
3097 // Record {
3098 // u2 attribute_name_index;
3099 // u4 attribute_length;
3100 // u2 components_count;
3101 // component_info components[components_count];
3102 // }
3103 // component_info {
3104 // u2 name_index;
3105 // u2 descriptor_index
3106 // u2 attributes_count;
3107 // attribute_info_attributes[attributes_count];
3108 // }
3109 u4 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3110 const ConstantPool* cp,
3111 const u1* const record_attribute_start,
3112 TRAPS) {
3113 const u1* const current_mark = cfs->current();
3114 int components_count = 0;
3115 unsigned int calculate_attr_size = 0;
3116 if (record_attribute_start != nullptr) {
3117 cfs->set_current(record_attribute_start);
3118 cfs->guarantee_more(2, CHECK_0); // num of components
3119 components_count = (int)cfs->get_u2_fast();
3120 calculate_attr_size = 2;
3121 }
3122
3123 Array<RecordComponent*>* const record_components =
3124 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, nullptr, CHECK_0);
3125 _record_components = record_components;
3126
3127 for (int x = 0; x < components_count; x++) {
3128 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3129
3130 const u2 name_index = cfs->get_u2_fast();
3131 guarantee_property(valid_symbol_at(name_index),
3132 "Invalid constant pool index %u for name in Record attribute in class file %s",
3133 name_index, CHECK_0);
3134 const Symbol* const name = cp->symbol_at(name_index);
3135 verify_legal_field_name(name, CHECK_0);
3136
3137 const u2 descriptor_index = cfs->get_u2_fast();
3138 guarantee_property(valid_symbol_at(descriptor_index),
3139 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3140 descriptor_index, CHECK_0);
3141 const Symbol* const descr = cp->symbol_at(descriptor_index);
3142 verify_legal_field_signature(name, descr, CHECK_0);
3143
3144 const u2 attributes_count = cfs->get_u2_fast();
3145 calculate_attr_size += 6;
3146 u2 generic_sig_index = 0;
3147 const u1* runtime_visible_annotations = nullptr;
3148 int runtime_visible_annotations_length = 0;
3149 bool runtime_invisible_annotations_exists = false;
3150 const u1* runtime_visible_type_annotations = nullptr;
3151 int runtime_visible_type_annotations_length = 0;
3152 bool runtime_invisible_type_annotations_exists = false;
3153
3154 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3155 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3156 for (int y = 0; y < attributes_count; y++) {
3157 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3158 const u2 attribute_name_index = cfs->get_u2_fast();
3159 const u4 attribute_length = cfs->get_u4_fast();
3160 calculate_attr_size += 6;
3161 guarantee_property(
3162 valid_symbol_at(attribute_name_index),
3163 "Invalid Record attribute name index %u in class file %s",
3164 attribute_name_index, CHECK_0);
3165
3166 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3167 if (attribute_name == vmSymbols::tag_signature()) {
3168 if (generic_sig_index != 0) {
3169 classfile_parse_error(
3170 "Multiple Signature attributes for Record component in class file %s",
3171 THREAD);
3172 return 0;
3173 }
3174 if (attribute_length != 2) {
3175 classfile_parse_error(
3176 "Invalid Signature attribute length %u in Record component in class file %s",
3177 attribute_length, THREAD);
3178 return 0;
3179 }
3180 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3181
3182 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3183 if (runtime_visible_annotations != nullptr) {
3184 classfile_parse_error(
3185 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3186 return 0;
3187 }
3188 runtime_visible_annotations_length = attribute_length;
3189 runtime_visible_annotations = cfs->current();
3190
3191 assert(runtime_visible_annotations != nullptr, "null record component visible annotation");
3192 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3193 cfs->skip_u1_fast(runtime_visible_annotations_length);
3194
3195 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3196 if (runtime_invisible_annotations_exists) {
3197 classfile_parse_error(
3198 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3199 return 0;
3200 }
3201 runtime_invisible_annotations_exists = true;
3202 cfs->skip_u1(attribute_length, CHECK_0);
3203
3204 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3205 if (runtime_visible_type_annotations != nullptr) {
3206 classfile_parse_error(
3207 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3208 return 0;
3209 }
3210 runtime_visible_type_annotations_length = attribute_length;
3211 runtime_visible_type_annotations = cfs->current();
3212
3213 assert(runtime_visible_type_annotations != nullptr, "null record component visible type annotation");
3214 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3215 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3216
3217 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3218 if (runtime_invisible_type_annotations_exists) {
3219 classfile_parse_error(
3220 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3221 return 0;
3222 }
3223 runtime_invisible_type_annotations_exists = true;
3224 cfs->skip_u1(attribute_length, CHECK_0);
3225
3226 } else {
3227 // Skip unknown attributes
3228 cfs->skip_u1(attribute_length, CHECK_0);
3229 }
3230 calculate_attr_size += attribute_length;
3231 } // End of attributes For loop
3232
3233 AnnotationArray* annotations = allocate_annotations(runtime_visible_annotations,
3234 runtime_visible_annotations_length,
3235 CHECK_0);
3236 AnnotationArray* type_annotations = allocate_annotations(runtime_visible_type_annotations,
3237 runtime_visible_type_annotations_length,
3238 CHECK_0);
3239
3240 RecordComponent* record_component =
3241 RecordComponent::allocate(_loader_data, name_index, descriptor_index, generic_sig_index,
3242 annotations, type_annotations, CHECK_0);
3243 record_components->at_put(x, record_component);
3244 } // End of component processing loop
3245
3246 // Restore buffer's current position.
3247 cfs->set_current(current_mark);
3248 return calculate_attr_size;
3249 }
3250
3251 void ClassFileParser::parse_classfile_synthetic_attribute() {
3252 set_class_synthetic_flag(true);
3253 }
3254
3255 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3256 assert(cfs != nullptr, "invariant");
3257
3258 const u2 signature_index = cfs->get_u2(CHECK);
3259 guarantee_property(
3260 valid_symbol_at(signature_index),
3261 "Invalid constant pool index %u in Signature attribute in class file %s",
3262 signature_index, CHECK);
3263 set_class_generic_signature_index(signature_index);
3264 }
3265
3266 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3267 ConstantPool* cp,
3268 u4 attribute_byte_length,
3269 TRAPS) {
3270 assert(cfs != nullptr, "invariant");
3271 assert(cp != nullptr, "invariant");
3272
3273 const u1* const current_start = cfs->current();
3274
3275 guarantee_property(attribute_byte_length >= sizeof(u2),
3276 "Invalid BootstrapMethods attribute length %u in class file %s",
3277 attribute_byte_length,
3278 CHECK);
3279
3280 cfs->guarantee_more(attribute_byte_length, CHECK);
3281
3282 const int attribute_array_length = cfs->get_u2_fast();
3283
3284 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3285 "Short length on BootstrapMethods in class file %s",
3286 CHECK);
3287
3288
3289 // The attribute contains a counted array of counted tuples of shorts,
3290 // represending bootstrap specifiers:
3291 // length*{bootstrap_method_index, argument_count*{argument_index}}
3292 const unsigned int operand_count = (attribute_byte_length - (unsigned)sizeof(u2)) / (unsigned)sizeof(u2);
3293 // operand_count = number of shorts in attr, except for leading length
3294
3295 // The attribute is copied into a short[] array.
3296 // The array begins with a series of short[2] pairs, one for each tuple.
3297 const int index_size = (attribute_array_length * 2);
3298
3299 Array<u2>* const operands =
3300 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3301
3302 // Eagerly assign operands so they will be deallocated with the constant
3303 // pool if there is an error.
3304 cp->set_operands(operands);
3305
3306 int operand_fill_index = index_size;
3307 const int cp_size = cp->length();
3308
3309 for (int n = 0; n < attribute_array_length; n++) {
3310 // Store a 32-bit offset into the header of the operand array.
3311 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3312
3313 // Read a bootstrap specifier.
3314 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3315 const u2 bootstrap_method_index = cfs->get_u2_fast();
3316 const u2 argument_count = cfs->get_u2_fast();
3317 guarantee_property(
3318 valid_cp_range(bootstrap_method_index, cp_size) &&
3319 cp->tag_at(bootstrap_method_index).is_method_handle(),
3320 "bootstrap_method_index %u has bad constant type in class file %s",
3321 bootstrap_method_index,
3322 CHECK);
3323
3324 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3325 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3326 CHECK);
3327
3328 operands->at_put(operand_fill_index++, bootstrap_method_index);
3329 operands->at_put(operand_fill_index++, argument_count);
3330
3331 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3332 for (int j = 0; j < argument_count; j++) {
3333 const u2 argument_index = cfs->get_u2_fast();
3334 guarantee_property(
3335 valid_cp_range(argument_index, cp_size) &&
3336 cp->tag_at(argument_index).is_loadable_constant(),
3337 "argument_index %u has bad constant type in class file %s",
3338 argument_index,
3339 CHECK);
3340 operands->at_put(operand_fill_index++, argument_index);
3341 }
3342 }
3343 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3344 "Bad length on BootstrapMethods in class file %s",
3345 CHECK);
3346 }
3347
3348 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3349 ConstantPool* cp,
3350 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3351 TRAPS) {
3352 assert(cfs != nullptr, "invariant");
3353 assert(cp != nullptr, "invariant");
3354 assert(parsed_annotations != nullptr, "invariant");
3355
3356 // Set inner classes attribute to default sentinel
3357 _inner_classes = Universe::the_empty_short_array();
3358 // Set nest members attribute to default sentinel
3359 _nest_members = Universe::the_empty_short_array();
3360 // Set _permitted_subclasses attribute to default sentinel
3361 _permitted_subclasses = Universe::the_empty_short_array();
3362 cfs->guarantee_more(2, CHECK); // attributes_count
3363 u2 attributes_count = cfs->get_u2_fast();
3364 bool parsed_sourcefile_attribute = false;
3365 bool parsed_innerclasses_attribute = false;
3366 bool parsed_nest_members_attribute = false;
3367 bool parsed_permitted_subclasses_attribute = false;
3368 bool parsed_nest_host_attribute = false;
3369 bool parsed_record_attribute = false;
3370 bool parsed_enclosingmethod_attribute = false;
3371 bool parsed_bootstrap_methods_attribute = false;
3372 const u1* runtime_visible_annotations = nullptr;
3373 int runtime_visible_annotations_length = 0;
3374 const u1* runtime_visible_type_annotations = nullptr;
3375 int runtime_visible_type_annotations_length = 0;
3376 bool runtime_invisible_type_annotations_exists = false;
3377 bool runtime_invisible_annotations_exists = false;
3378 bool parsed_source_debug_ext_annotations_exist = false;
3379 const u1* inner_classes_attribute_start = nullptr;
3380 u4 inner_classes_attribute_length = 0;
3381 u2 enclosing_method_class_index = 0;
3382 u2 enclosing_method_method_index = 0;
3383 const u1* nest_members_attribute_start = nullptr;
3384 u4 nest_members_attribute_length = 0;
3385 const u1* record_attribute_start = nullptr;
3386 u4 record_attribute_length = 0;
3387 const u1* permitted_subclasses_attribute_start = nullptr;
3388 u4 permitted_subclasses_attribute_length = 0;
3389
3390 // Iterate over attributes
3391 while (attributes_count--) {
3392 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3393 const u2 attribute_name_index = cfs->get_u2_fast();
3394 const u4 attribute_length = cfs->get_u4_fast();
3395 guarantee_property(
3396 valid_symbol_at(attribute_name_index),
3397 "Attribute name has bad constant pool index %u in class file %s",
3398 attribute_name_index, CHECK);
3399 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3400 if (tag == vmSymbols::tag_source_file()) {
3401 // Check for SourceFile tag
3402 if (_need_verify) {
3403 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3404 }
3405 if (parsed_sourcefile_attribute) {
3406 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3407 return;
3408 } else {
3409 parsed_sourcefile_attribute = true;
3410 }
3411 parse_classfile_sourcefile_attribute(cfs, CHECK);
3412 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3413 // Check for SourceDebugExtension tag
3414 if (parsed_source_debug_ext_annotations_exist) {
3415 classfile_parse_error(
3416 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3417 return;
3418 }
3419 parsed_source_debug_ext_annotations_exist = true;
3420 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3421 } else if (tag == vmSymbols::tag_inner_classes()) {
3422 // Check for InnerClasses tag
3423 if (parsed_innerclasses_attribute) {
3424 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3425 return;
3426 } else {
3427 parsed_innerclasses_attribute = true;
3428 }
3429 inner_classes_attribute_start = cfs->current();
3430 inner_classes_attribute_length = attribute_length;
3431 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3432 } else if (tag == vmSymbols::tag_synthetic()) {
3433 // Check for Synthetic tag
3434 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3435 if (attribute_length != 0) {
3436 classfile_parse_error(
3437 "Invalid Synthetic classfile attribute length %u in class file %s",
3438 attribute_length, THREAD);
3439 return;
3440 }
3441 parse_classfile_synthetic_attribute();
3442 } else if (tag == vmSymbols::tag_deprecated()) {
3443 // Check for Deprecated tag - 4276120
3444 if (attribute_length != 0) {
3445 classfile_parse_error(
3446 "Invalid Deprecated classfile attribute length %u in class file %s",
3447 attribute_length, THREAD);
3448 return;
3449 }
3450 } else if (_major_version >= JAVA_1_5_VERSION) {
3451 if (tag == vmSymbols::tag_signature()) {
3452 if (_generic_signature_index != 0) {
3453 classfile_parse_error(
3454 "Multiple Signature attributes in class file %s", THREAD);
3455 return;
3456 }
3457 if (attribute_length != 2) {
3458 classfile_parse_error(
3459 "Wrong Signature attribute length %u in class file %s",
3460 attribute_length, THREAD);
3461 return;
3462 }
3463 parse_classfile_signature_attribute(cfs, CHECK);
3464 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3465 if (runtime_visible_annotations != nullptr) {
3466 classfile_parse_error(
3467 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3468 return;
3469 }
3470 runtime_visible_annotations_length = attribute_length;
3471 runtime_visible_annotations = cfs->current();
3472 assert(runtime_visible_annotations != nullptr, "null visible annotations");
3473 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3474 parse_annotations(cp,
3475 runtime_visible_annotations,
3476 runtime_visible_annotations_length,
3477 parsed_annotations,
3478 _loader_data,
3479 _can_access_vm_annotations);
3480 cfs->skip_u1_fast(runtime_visible_annotations_length);
3481 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3482 if (runtime_invisible_annotations_exists) {
3483 classfile_parse_error(
3484 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3485 return;
3486 }
3487 runtime_invisible_annotations_exists = true;
3488 cfs->skip_u1(attribute_length, CHECK);
3489 } else if (tag == vmSymbols::tag_enclosing_method()) {
3490 if (parsed_enclosingmethod_attribute) {
3491 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3492 return;
3493 } else {
3494 parsed_enclosingmethod_attribute = true;
3495 }
3496 guarantee_property(attribute_length == 4,
3497 "Wrong EnclosingMethod attribute length %u in class file %s",
3498 attribute_length, CHECK);
3499 cfs->guarantee_more(4, CHECK); // class_index, method_index
3500 enclosing_method_class_index = cfs->get_u2_fast();
3501 enclosing_method_method_index = cfs->get_u2_fast();
3502 if (enclosing_method_class_index == 0) {
3503 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3504 return;
3505 }
3506 // Validate the constant pool indices and types
3507 guarantee_property(valid_klass_reference_at(enclosing_method_class_index),
3508 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3509 if (enclosing_method_method_index != 0 &&
3510 (!cp->is_within_bounds(enclosing_method_method_index) ||
3511 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3512 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3513 return;
3514 }
3515 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3516 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3517 if (parsed_bootstrap_methods_attribute) {
3518 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3519 return;
3520 }
3521 parsed_bootstrap_methods_attribute = true;
3522 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3523 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3524 if (runtime_visible_type_annotations != nullptr) {
3525 classfile_parse_error(
3526 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3527 return;
3528 }
3529 runtime_visible_type_annotations_length = attribute_length;
3530 runtime_visible_type_annotations = cfs->current();
3531 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
3532 // No need for the VM to parse Type annotations
3533 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3534 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3535 if (runtime_invisible_type_annotations_exists) {
3536 classfile_parse_error(
3537 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3538 return;
3539 }
3540 runtime_invisible_type_annotations_exists = true;
3541 cfs->skip_u1(attribute_length, CHECK);
3542 } else if (_major_version >= JAVA_11_VERSION) {
3543 if (tag == vmSymbols::tag_nest_members()) {
3544 // Check for NestMembers tag
3545 if (parsed_nest_members_attribute) {
3546 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3547 return;
3548 } else {
3549 parsed_nest_members_attribute = true;
3550 }
3551 if (parsed_nest_host_attribute) {
3552 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3553 return;
3554 }
3555 nest_members_attribute_start = cfs->current();
3556 nest_members_attribute_length = attribute_length;
3557 cfs->skip_u1(nest_members_attribute_length, CHECK);
3558 } else if (tag == vmSymbols::tag_nest_host()) {
3559 if (parsed_nest_host_attribute) {
3560 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
3561 return;
3562 } else {
3563 parsed_nest_host_attribute = true;
3564 }
3565 if (parsed_nest_members_attribute) {
3566 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
3567 return;
3568 }
3569 if (_need_verify) {
3570 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3571 }
3572 cfs->guarantee_more(2, CHECK);
3573 u2 class_info_index = cfs->get_u2_fast();
3574 guarantee_property(
3575 valid_klass_reference_at(class_info_index),
3576 "Nest-host class_info_index %u has bad constant type in class file %s",
3577 class_info_index, CHECK);
3578 _nest_host = class_info_index;
3579
3580 } else if (_major_version >= JAVA_16_VERSION) {
3581 if (tag == vmSymbols::tag_record()) {
3582 if (parsed_record_attribute) {
3583 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
3584 return;
3585 }
3586 parsed_record_attribute = true;
3587 record_attribute_start = cfs->current();
3588 record_attribute_length = attribute_length;
3589 } else if (_major_version >= JAVA_17_VERSION) {
3590 if (tag == vmSymbols::tag_permitted_subclasses()) {
3591 if (parsed_permitted_subclasses_attribute) {
3592 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3593 return;
3594 }
3595 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3596 if (_access_flags.is_final()) {
3597 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3598 return;
3599 }
3600 parsed_permitted_subclasses_attribute = true;
3601 permitted_subclasses_attribute_start = cfs->current();
3602 permitted_subclasses_attribute_length = attribute_length;
3603 }
3604 }
3605 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3606 cfs->skip_u1(attribute_length, CHECK);
3607 } else {
3608 // Unknown attribute
3609 cfs->skip_u1(attribute_length, CHECK);
3610 }
3611 } else {
3612 // Unknown attribute
3613 cfs->skip_u1(attribute_length, CHECK);
3614 }
3615 } else {
3616 // Unknown attribute
3617 cfs->skip_u1(attribute_length, CHECK);
3618 }
3619 }
3620 _class_annotations = allocate_annotations(runtime_visible_annotations,
3621 runtime_visible_annotations_length,
3622 CHECK);
3623 _class_type_annotations = allocate_annotations(runtime_visible_type_annotations,
3624 runtime_visible_type_annotations_length,
3625 CHECK);
3626
3627 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3628 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3629 cfs,
3630 cp,
3631 inner_classes_attribute_start,
3632 parsed_innerclasses_attribute,
3633 enclosing_method_class_index,
3634 enclosing_method_method_index,
3635 CHECK);
3636 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3637 guarantee_property(
3638 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3639 "Wrong InnerClasses attribute length in class file %s", CHECK);
3640 }
3641 }
3642
3643 if (parsed_nest_members_attribute) {
3644 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3645 cfs,
3646 nest_members_attribute_start,
3647 CHECK);
3648 if (_need_verify) {
3649 guarantee_property(
3650 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3651 "Wrong NestMembers attribute length in class file %s", CHECK);
3652 }
3653 }
3654
3655 if (parsed_record_attribute) {
3656 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
3657 cfs,
3658 cp,
3659 record_attribute_start,
3660 CHECK);
3661 if (_need_verify) {
3662 guarantee_property(record_attribute_length == calculated_attr_length,
3663 "Record attribute has wrong length in class file %s",
3664 CHECK);
3665 }
3666 }
3667
3668 if (parsed_permitted_subclasses_attribute) {
3669 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3670 cfs,
3671 permitted_subclasses_attribute_start,
3672 CHECK);
3673 if (_need_verify) {
3674 guarantee_property(
3675 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3676 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3677 }
3678 }
3679
3680 if (_max_bootstrap_specifier_index >= 0) {
3681 guarantee_property(parsed_bootstrap_methods_attribute,
3682 "Missing BootstrapMethods attribute in class file %s", CHECK);
3683 }
3684 }
3685
3686 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3687 assert(k != nullptr, "invariant");
3688
3689 if (_synthetic_flag)
3690 k->set_is_synthetic();
3691 if (_sourcefile_index != 0) {
3692 k->set_source_file_name_index(_sourcefile_index);
3693 }
3694 if (_generic_signature_index != 0) {
3695 k->set_generic_signature_index(_generic_signature_index);
3696 }
3697 if (_sde_buffer != nullptr) {
3698 k->set_source_debug_extension(_sde_buffer, _sde_length);
3699 }
3700 }
3701
3702 // Create the Annotations object that will
3703 // hold the annotations array for the Klass.
3704 void ClassFileParser::create_combined_annotations(TRAPS) {
3705 if (_class_annotations == nullptr &&
3706 _class_type_annotations == nullptr &&
3707 _fields_annotations == nullptr &&
3708 _fields_type_annotations == nullptr) {
3709 // Don't create the Annotations object unnecessarily.
3710 return;
3711 }
3712
3713 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3714 annotations->set_class_annotations(_class_annotations);
3715 annotations->set_class_type_annotations(_class_type_annotations);
3716 annotations->set_fields_annotations(_fields_annotations);
3717 annotations->set_fields_type_annotations(_fields_type_annotations);
3718
3719 // This is the Annotations object that will be
3720 // assigned to InstanceKlass being constructed.
3721 _combined_annotations = annotations;
3722
3723 // The annotations arrays below has been transferred the
3724 // _combined_annotations so these fields can now be cleared.
3725 _class_annotations = nullptr;
3726 _class_type_annotations = nullptr;
3727 _fields_annotations = nullptr;
3728 _fields_type_annotations = nullptr;
3729 }
3730
3731 // Transfer ownership of metadata allocated to the InstanceKlass.
3732 void ClassFileParser::apply_parsed_class_metadata(
3733 InstanceKlass* this_klass,
3734 int java_fields_count) {
3735 assert(this_klass != nullptr, "invariant");
3736
3737 _cp->set_pool_holder(this_klass);
3738 this_klass->set_constants(_cp);
3739 this_klass->set_fieldinfo_stream(_fieldinfo_stream);
3740 this_klass->set_fields_status(_fields_status);
3741 this_klass->set_methods(_methods);
3742 this_klass->set_inner_classes(_inner_classes);
3743 this_klass->set_nest_members(_nest_members);
3744 this_klass->set_nest_host_index(_nest_host);
3745 this_klass->set_annotations(_combined_annotations);
3746 this_klass->set_permitted_subclasses(_permitted_subclasses);
3747 this_klass->set_record_components(_record_components);
3748 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3749 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3750 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3751 // its _super. If an OOM occurs while loading the current klass, its _super field
3752 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3753 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3754 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3755
3756 // Clear out these fields so they don't get deallocated by the destructor
3757 clear_class_metadata();
3758 }
3759
3760 AnnotationArray* ClassFileParser::allocate_annotations(const u1* const anno,
3761 int anno_length,
3762 TRAPS) {
3763 AnnotationArray* annotations = nullptr;
3764 if (anno != nullptr) {
3765 annotations = MetadataFactory::new_array<u1>(_loader_data,
3766 anno_length,
3767 CHECK_(annotations));
3768 for (int i = 0; i < anno_length; i++) {
3769 annotations->at_put(i, anno[i]);
3770 }
3771 }
3772 return annotations;
3773 }
3774
3775 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3776 const int super_class_index,
3777 const bool need_verify,
3778 TRAPS) {
3779 assert(cp != nullptr, "invariant");
3780 const InstanceKlass* super_klass = nullptr;
3781
3782 if (super_class_index == 0) {
3783 guarantee_property(_class_name == vmSymbols::java_lang_Object(),
3784 "Invalid superclass index %u in class file %s",
3785 super_class_index,
3786 CHECK_NULL);
3787 } else {
3788 guarantee_property(valid_klass_reference_at(super_class_index),
3789 "Invalid superclass index %u in class file %s",
3790 super_class_index,
3791 CHECK_NULL);
3792 // The class name should be legal because it is checked when parsing constant pool.
3793 // However, make sure it is not an array type.
3794 bool is_array = false;
3795 if (cp->tag_at(super_class_index).is_klass()) {
3796 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3797 if (need_verify)
3798 is_array = super_klass->is_array_klass();
3799 } else if (need_verify) {
3800 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3801 }
3802 if (need_verify) {
3803 guarantee_property(!is_array,
3804 "Bad superclass name in class file %s", CHECK_NULL);
3805 }
3806 }
3807 return super_klass;
3808 }
3809
3810 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
3811 _max_nonstatic_oop_maps = max_blocks;
3812 _nonstatic_oop_map_count = 0;
3813 if (max_blocks == 0) {
3814 _nonstatic_oop_maps = nullptr;
3815 } else {
3816 _nonstatic_oop_maps =
3817 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
3818 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3819 }
3820 }
3821
3822 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
3823 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
3824 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
3825 }
3826
3827 // addition of super oop maps
3828 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3829 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
3830 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
3831
3832 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3833 _nonstatic_oop_map_count += nof_blocks;
3834 }
3835
3836 // collection of oops
3837 void OopMapBlocksBuilder::add(int offset, int count) {
3838 if (_nonstatic_oop_map_count == 0) {
3839 _nonstatic_oop_map_count++;
3840 }
3841 OopMapBlock* nonstatic_oop_map = last_oop_map();
3842 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3843 nonstatic_oop_map->set_offset(offset);
3844 nonstatic_oop_map->set_count(count);
3845 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3846 nonstatic_oop_map->increment_count(count);
3847 } else { // Need a new one...
3848 _nonstatic_oop_map_count++;
3849 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
3850 nonstatic_oop_map = last_oop_map();
3851 nonstatic_oop_map->set_offset(offset);
3852 nonstatic_oop_map->set_count(count);
3853 }
3854 }
3855
3856 // general purpose copy, e.g. into allocated instanceKlass
3857 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
3858 if (_nonstatic_oop_map_count != 0) {
3859 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
3860 }
3861 }
3862
3863 // Sort and compact adjacent blocks
3864 void OopMapBlocksBuilder::compact() {
3865 if (_nonstatic_oop_map_count <= 1) {
3866 return;
3867 }
3868 /*
3869 * Since field layout sneaks in oops before values, we will be able to condense
3870 * blocks. There is potential to compact between super, own refs and values
3871 * containing refs.
3872 *
3873 * Currently compaction is slightly limited due to values being 8 byte aligned.
3874 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
3875 * and maybe it doesn't need to be.
3876 */
3877 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
3878 (_sort_Fn)OopMapBlock::compare_offset);
3879 if (_nonstatic_oop_map_count < 2) {
3880 return;
3881 }
3882
3883 // Make a temp copy, and iterate through and copy back into the original
3884 ResourceMark rm;
3885 OopMapBlock* oop_maps_copy =
3886 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
3887 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
3888 copy(oop_maps_copy);
3889 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
3890 unsigned int new_count = 1;
3891 oop_maps_copy++;
3892 while(oop_maps_copy < oop_maps_copy_end) {
3893 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3894 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3895 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3896 } else {
3897 nonstatic_oop_map++;
3898 new_count++;
3899 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3900 nonstatic_oop_map->set_count(oop_maps_copy->count());
3901 }
3902 oop_maps_copy++;
3903 }
3904 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
3905 _nonstatic_oop_map_count = new_count;
3906 }
3907
3908 void OopMapBlocksBuilder::print_on(outputStream* st) const {
3909 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
3910 if (_nonstatic_oop_map_count > 0) {
3911 OopMapBlock* map = _nonstatic_oop_maps;
3912 OopMapBlock* last_map = last_oop_map();
3913 assert(map <= last_map, "Last less than first");
3914 while (map <= last_map) {
3915 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3916 map->offset() + map->offset_span() - heapOopSize, map->count());
3917 map++;
3918 }
3919 }
3920 }
3921
3922 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
3923 print_on(st);
3924 }
3925
3926 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
3927 assert(ik != nullptr, "invariant");
3928
3929 const InstanceKlass* const super = ik->java_super();
3930
3931 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3932 // in which case we don't have to register objects as finalizable
3933 if (!_has_empty_finalizer) {
3934 if (_has_finalizer ||
3935 (super != nullptr && super->has_finalizer())) {
3936 ik->set_has_finalizer();
3937 }
3938 }
3939
3940 #ifdef ASSERT
3941 bool f = false;
3942 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
3943 vmSymbols::void_method_signature());
3944 if (InstanceKlass::is_finalization_enabled() &&
3945 (m != nullptr) && !m->is_empty_method()) {
3946 f = true;
3947 }
3948
3949 // Spec doesn't prevent agent from redefinition of empty finalizer.
3950 // Despite the fact that it's generally bad idea and redefined finalizer
3951 // will not work as expected we shouldn't abort vm in this case
3952 if (!ik->has_redefined_this_or_super()) {
3953 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
3954 }
3955 #endif
3956
3957 // Check if this klass supports the java.lang.Cloneable interface
3958 if (vmClasses::Cloneable_klass_loaded()) {
3959 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
3960 ik->set_is_cloneable();
3961 }
3962 }
3963
3964 // If it cannot be fast-path allocated, set a bit in the layout helper.
3965 // See documentation of InstanceKlass::can_be_fastpath_allocated().
3966 assert(ik->size_helper() > 0, "layout_helper is initialized");
3967 if (ik->is_abstract() || ik->is_interface()
3968 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == nullptr)
3969 || ik->size_helper() >= FastAllocateSizeLimit) {
3970 // Forbid fast-path allocation.
3971 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
3972 ik->set_layout_helper(lh);
3973 }
3974 }
3975
3976 // utility methods for appending an array with check for duplicates
3977
3978 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
3979 const Array<InstanceKlass*>* const ifs) {
3980 // iterate over new interfaces
3981 for (int i = 0; i < ifs->length(); i++) {
3982 InstanceKlass* const e = ifs->at(i);
3983 assert(e->is_klass() && e->is_interface(), "just checking");
3984 // add new interface
3985 result->append_if_missing(e);
3986 }
3987 }
3988
3989 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
3990 Array<InstanceKlass*>* local_ifs,
3991 ClassLoaderData* loader_data,
3992 TRAPS) {
3993 assert(local_ifs != nullptr, "invariant");
3994 assert(loader_data != nullptr, "invariant");
3995
3996 // Compute maximum size for transitive interfaces
3997 int max_transitive_size = 0;
3998 int super_size = 0;
3999 // Add superclass transitive interfaces size
4000 if (super != nullptr) {
4001 super_size = super->transitive_interfaces()->length();
4002 max_transitive_size += super_size;
4003 }
4004 // Add local interfaces' super interfaces
4005 const int local_size = local_ifs->length();
4006 for (int i = 0; i < local_size; i++) {
4007 InstanceKlass* const l = local_ifs->at(i);
4008 max_transitive_size += l->transitive_interfaces()->length();
4009 }
4010 // Finally add local interfaces
4011 max_transitive_size += local_size;
4012 // Construct array
4013 if (max_transitive_size == 0) {
4014 // no interfaces, use canonicalized array
4015 return Universe::the_empty_instance_klass_array();
4016 } else if (max_transitive_size == super_size) {
4017 // no new local interfaces added, share superklass' transitive interface array
4018 return super->transitive_interfaces();
4019 } else if (max_transitive_size == local_size) {
4020 // only local interfaces added, share local interface array
4021 return local_ifs;
4022 } else {
4023 ResourceMark rm;
4024 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4025
4026 // Copy down from superclass
4027 if (super != nullptr) {
4028 append_interfaces(result, super->transitive_interfaces());
4029 }
4030
4031 // Copy down from local interfaces' superinterfaces
4032 for (int i = 0; i < local_size; i++) {
4033 InstanceKlass* const l = local_ifs->at(i);
4034 append_interfaces(result, l->transitive_interfaces());
4035 }
4036 // Finally add local interfaces
4037 append_interfaces(result, local_ifs);
4038
4039 // length will be less than the max_transitive_size if duplicates were removed
4040 const int length = result->length();
4041 assert(length <= max_transitive_size, "just checking");
4042 Array<InstanceKlass*>* const new_result =
4043 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4044 for (int i = 0; i < length; i++) {
4045 InstanceKlass* const e = result->at(i);
4046 assert(e != nullptr, "just checking");
4047 new_result->at_put(i, e);
4048 }
4049 return new_result;
4050 }
4051 }
4052
4053 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4054 assert(this_klass != nullptr, "invariant");
4055 const Klass* const super = this_klass->super();
4056
4057 if (super != nullptr) {
4058 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4059
4060 if (super->is_final()) {
4061 classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4062 return;
4063 }
4064
4065 if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4066 classfile_icce_error("class %s cannot inherit from sealed class %s", super_ik, THREAD);
4067 return;
4068 }
4069
4070 Reflection::VerifyClassAccessResults vca_result =
4071 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4072 if (vca_result != Reflection::ACCESS_OK) {
4073 ResourceMark rm(THREAD);
4074 char* msg = Reflection::verify_class_access_msg(this_klass,
4075 InstanceKlass::cast(super),
4076 vca_result);
4077 if (msg == nullptr) {
4078 bool same_module = (this_klass->module() == super->module());
4079 Exceptions::fthrow(
4080 THREAD_AND_LOCATION,
4081 vmSymbols::java_lang_IllegalAccessError(),
4082 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4083 this_klass->external_name(),
4084 super->is_abstract() ? "abstract " : "",
4085 super->external_name(),
4086 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4087 (same_module) ? "" : "; ",
4088 (same_module) ? "" : super->class_in_module_of_loader());
4089 } else {
4090 // Add additional message content.
4091 Exceptions::fthrow(
4092 THREAD_AND_LOCATION,
4093 vmSymbols::java_lang_IllegalAccessError(),
4094 "superclass access check failed: %s",
4095 msg);
4096 }
4097 }
4098 }
4099 }
4100
4101
4102 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4103 assert(this_klass != nullptr, "invariant");
4104 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4105 const int lng = local_interfaces->length();
4106 for (int i = lng - 1; i >= 0; i--) {
4107 InstanceKlass* const k = local_interfaces->at(i);
4108 assert (k != nullptr && k->is_interface(), "invalid interface");
4109
4110 if (k->is_sealed() && !k->has_as_permitted_subclass(this_klass)) {
4111 classfile_icce_error(this_klass->is_interface() ?
4112 "class %s cannot extend sealed interface %s" :
4113 "class %s cannot implement sealed interface %s",
4114 k, THREAD);
4115 return;
4116 }
4117
4118 Reflection::VerifyClassAccessResults vca_result =
4119 Reflection::verify_class_access(this_klass, k, false);
4120 if (vca_result != Reflection::ACCESS_OK) {
4121 ResourceMark rm(THREAD);
4122 char* msg = Reflection::verify_class_access_msg(this_klass,
4123 k,
4124 vca_result);
4125 if (msg == nullptr) {
4126 bool same_module = (this_klass->module() == k->module());
4127 Exceptions::fthrow(
4128 THREAD_AND_LOCATION,
4129 vmSymbols::java_lang_IllegalAccessError(),
4130 "class %s cannot access its superinterface %s (%s%s%s)",
4131 this_klass->external_name(),
4132 k->external_name(),
4133 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4134 (same_module) ? "" : "; ",
4135 (same_module) ? "" : k->class_in_module_of_loader());
4136 return;
4137 } else {
4138 // Add additional message content.
4139 Exceptions::fthrow(
4140 THREAD_AND_LOCATION,
4141 vmSymbols::java_lang_IllegalAccessError(),
4142 "superinterface check failed: %s",
4143 msg);
4144 return;
4145 }
4146 }
4147 }
4148 }
4149
4150
4151 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4152 assert(this_klass != nullptr, "invariant");
4153 const Array<Method*>* const methods = this_klass->methods();
4154 const int num_methods = methods->length();
4155
4156 // go thru each method and check if it overrides a final method
4157 for (int index = 0; index < num_methods; index++) {
4158 const Method* const m = methods->at(index);
4159
4160 // skip private, static, and <init> methods
4161 if ((!m->is_private() && !m->is_static()) &&
4162 (m->name() != vmSymbols::object_initializer_name())) {
4163
4164 const Symbol* const name = m->name();
4165 const Symbol* const signature = m->signature();
4166 const InstanceKlass* k = this_klass->java_super();
4167 const Method* super_m = nullptr;
4168 while (k != nullptr) {
4169 // skip supers that don't have final methods.
4170 if (k->has_final_method()) {
4171 // lookup a matching method in the super class hierarchy
4172 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4173 if (super_m == nullptr) {
4174 break; // didn't find any match; get out
4175 }
4176
4177 if (super_m->is_final() && !super_m->is_static() &&
4178 !super_m->access_flags().is_private()) {
4179 // matching method in super is final, and not static or private
4180 bool can_access = Reflection::verify_member_access(this_klass,
4181 super_m->method_holder(),
4182 super_m->method_holder(),
4183 super_m->access_flags(),
4184 false, false, CHECK);
4185 if (can_access) {
4186 // this class can access super final method and therefore override
4187 ResourceMark rm(THREAD);
4188 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4189 err_msg("class %s overrides final method %s.%s%s",
4190 this_klass->external_name(),
4191 super_m->method_holder()->external_name(),
4192 name->as_C_string(),
4193 signature->as_C_string()));
4194 }
4195 }
4196
4197 // continue to look from super_m's holder's super.
4198 k = super_m->method_holder()->java_super();
4199 continue;
4200 }
4201
4202 k = k->java_super();
4203 }
4204 }
4205 }
4206 }
4207
4208
4209 // assumes that this_klass is an interface
4210 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4211 assert(this_klass != nullptr, "invariant");
4212 assert(this_klass->is_interface(), "not an interface");
4213 const Array<Method*>* methods = this_klass->methods();
4214 const int num_methods = methods->length();
4215
4216 for (int index = 0; index < num_methods; index++) {
4217 const Method* const m = methods->at(index);
4218 // if m is static and not the init method, throw a verify error
4219 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4220 ResourceMark rm(THREAD);
4221 Exceptions::fthrow(
4222 THREAD_AND_LOCATION,
4223 vmSymbols::java_lang_VerifyError(),
4224 "Illegal static method %s in interface %s",
4225 m->name()->as_C_string(),
4226 this_klass->external_name()
4227 );
4228 return;
4229 }
4230 }
4231 }
4232
4233 // utility methods for format checking
4234
4235 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4236 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4237 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4238 if (is_module) {
4239 ResourceMark rm(THREAD);
4240 Exceptions::fthrow(
4241 THREAD_AND_LOCATION,
4242 vmSymbols::java_lang_NoClassDefFoundError(),
4243 "%s is not a class because access_flag ACC_MODULE is set",
4244 _class_name->as_C_string());
4245 return;
4246 }
4247
4248 if (!_need_verify) { return; }
4249
4250 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4251 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4252 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4253 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4254 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4255 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4256 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4257
4258 if ((is_abstract && is_final) ||
4259 (is_interface && !is_abstract) ||
4260 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4261 (!is_interface && major_gte_1_5 && is_annotation)) {
4262 ResourceMark rm(THREAD);
4263 Exceptions::fthrow(
4264 THREAD_AND_LOCATION,
4265 vmSymbols::java_lang_ClassFormatError(),
4266 "Illegal class modifiers in class %s: 0x%X",
4267 _class_name->as_C_string(), flags
4268 );
4269 return;
4270 }
4271 }
4272
4273 static bool has_illegal_visibility(jint flags) {
4274 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4275 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4276 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4277
4278 return ((is_public && is_protected) ||
4279 (is_public && is_private) ||
4280 (is_protected && is_private));
4281 }
4282
4283 // A legal major_version.minor_version must be one of the following:
4284 //
4285 // Major_version >= 45 and major_version < 56, any minor_version.
4286 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4287 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4288 //
4289 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4290 ResourceMark rm(THREAD);
4291 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4292 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4293 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4294 class_name, major, minor, THREAD);
4295 return;
4296 }
4297
4298 if (major > max_version) {
4299 Exceptions::fthrow(
4300 THREAD_AND_LOCATION,
4301 vmSymbols::java_lang_UnsupportedClassVersionError(),
4302 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4303 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4304 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4305 return;
4306 }
4307
4308 if (major < JAVA_12_VERSION || minor == 0) {
4309 return;
4310 }
4311
4312 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4313 if (major != max_version) {
4314 Exceptions::fthrow(
4315 THREAD_AND_LOCATION,
4316 vmSymbols::java_lang_UnsupportedClassVersionError(),
4317 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4318 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4319 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4320 return;
4321 }
4322
4323 if (!Arguments::enable_preview()) {
4324 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4325 class_name, major, minor, THREAD);
4326 return;
4327 }
4328
4329 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4330 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4331 class_name, major, minor, THREAD);
4332 }
4333 }
4334
4335 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4336 bool is_interface,
4337 TRAPS) const {
4338 if (!_need_verify) { return; }
4339
4340 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4341 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4342 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4343 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4344 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4345 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4346 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4347 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4348 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4349
4350 bool is_illegal = false;
4351
4352 if (is_interface) {
4353 if (!is_public || !is_static || !is_final || is_private ||
4354 is_protected || is_volatile || is_transient ||
4355 (major_gte_1_5 && is_enum)) {
4356 is_illegal = true;
4357 }
4358 } else { // not interface
4359 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4360 is_illegal = true;
4361 }
4362 }
4363
4364 if (is_illegal) {
4365 ResourceMark rm(THREAD);
4366 Exceptions::fthrow(
4367 THREAD_AND_LOCATION,
4368 vmSymbols::java_lang_ClassFormatError(),
4369 "Illegal field modifiers in class %s: 0x%X",
4370 _class_name->as_C_string(), flags);
4371 return;
4372 }
4373 }
4374
4375 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4376 bool is_interface,
4377 const Symbol* name,
4378 TRAPS) const {
4379 if (!_need_verify) { return; }
4380
4381 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4382 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4383 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4384 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4385 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4386 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4387 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4388 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4389 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4390 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4391 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4392 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4393 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4394 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4395
4396 bool is_illegal = false;
4397
4398 if (is_interface) {
4399 if (major_gte_8) {
4400 // Class file version is JAVA_8_VERSION or later Methods of
4401 // interfaces may set any of the flags except ACC_PROTECTED,
4402 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4403 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4404 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4405 (is_native || is_protected || is_final || is_synchronized) ||
4406 // If a specific method of a class or interface has its
4407 // ACC_ABSTRACT flag set, it must not have any of its
4408 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4409 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4410 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4411 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4412 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4413 is_illegal = true;
4414 }
4415 } else if (major_gte_1_5) {
4416 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4417 if (!is_public || is_private || is_protected || is_static || is_final ||
4418 is_synchronized || is_native || !is_abstract || is_strict) {
4419 is_illegal = true;
4420 }
4421 } else {
4422 // Class file version is pre-JAVA_1_5_VERSION
4423 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4424 is_illegal = true;
4425 }
4426 }
4427 } else { // not interface
4428 if (has_illegal_visibility(flags)) {
4429 is_illegal = true;
4430 } else {
4431 if (is_initializer) {
4432 if (is_static || is_final || is_synchronized || is_native ||
4433 is_abstract || (major_gte_1_5 && is_bridge)) {
4434 is_illegal = true;
4435 }
4436 } else { // not initializer
4437 if (is_abstract) {
4438 if ((is_final || is_native || is_private || is_static ||
4439 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4440 is_illegal = true;
4441 }
4442 }
4443 }
4444 }
4445 }
4446
4447 if (is_illegal) {
4448 ResourceMark rm(THREAD);
4449 Exceptions::fthrow(
4450 THREAD_AND_LOCATION,
4451 vmSymbols::java_lang_ClassFormatError(),
4452 "Method %s in class %s has illegal modifiers: 0x%X",
4453 name->as_C_string(), _class_name->as_C_string(), flags);
4454 return;
4455 }
4456 }
4457
4458 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4459 int length,
4460 TRAPS) const {
4461 assert(_need_verify, "only called when _need_verify is true");
4462 // Note: 0 <= length < 64K, as it comes from a u2 entry in the CP.
4463 if (!UTF8::is_legal_utf8(buffer, static_cast<size_t>(length), _major_version <= 47)) {
4464 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4465 }
4466 }
4467
4468 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4469 // In class names, '/' separates unqualified names. This is verified in this function also.
4470 // Method names also may not contain the characters '<' or '>', unless <init>
4471 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4472 // method. Because these names have been checked as special cases before
4473 // calling this method in verify_legal_method_name.
4474 //
4475 // This method is also called from the modular system APIs in modules.cpp
4476 // to verify the validity of module and package names.
4477 bool ClassFileParser::verify_unqualified_name(const char* name,
4478 unsigned int length,
4479 int type) {
4480 if (length == 0) return false; // Must have at least one char.
4481 for (const char* p = name; p != name + length; p++) {
4482 switch(*p) {
4483 case JVM_SIGNATURE_DOT:
4484 case JVM_SIGNATURE_ENDCLASS:
4485 case JVM_SIGNATURE_ARRAY:
4486 // do not permit '.', ';', or '['
4487 return false;
4488 case JVM_SIGNATURE_SLASH:
4489 // check for '//' or leading or trailing '/' which are not legal
4490 // unqualified name must not be empty
4491 if (type == ClassFileParser::LegalClass) {
4492 if (p == name || p+1 >= name+length ||
4493 *(p+1) == JVM_SIGNATURE_SLASH) {
4494 return false;
4495 }
4496 } else {
4497 return false; // do not permit '/' unless it's class name
4498 }
4499 break;
4500 case JVM_SIGNATURE_SPECIAL:
4501 case JVM_SIGNATURE_ENDSPECIAL:
4502 // do not permit '<' or '>' in method names
4503 if (type == ClassFileParser::LegalMethod) {
4504 return false;
4505 }
4506 }
4507 }
4508 return true;
4509 }
4510
4511 // Take pointer to a UTF8 byte string (not NUL-terminated).
4512 // Skip over the longest part of the string that could
4513 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
4514 // Return a pointer to just past the fieldname.
4515 // Return null if no fieldname at all was found, or in the case of slash_ok
4516 // being true, we saw consecutive slashes (meaning we were looking for a
4517 // qualified path but found something that was badly-formed).
4518 static const char* skip_over_field_name(const char* const name,
4519 bool slash_ok,
4520 unsigned int length) {
4521 const char* p;
4522 jboolean last_is_slash = false;
4523 jboolean not_first_ch = false;
4524
4525 for (p = name; p != name + length; not_first_ch = true) {
4526 const char* old_p = p;
4527 jchar ch = *p;
4528 if (ch < 128) {
4529 p++;
4530 // quick check for ascii
4531 if ((ch >= 'a' && ch <= 'z') ||
4532 (ch >= 'A' && ch <= 'Z') ||
4533 (ch == '_' || ch == '$') ||
4534 (not_first_ch && ch >= '0' && ch <= '9')) {
4535 last_is_slash = false;
4536 continue;
4537 }
4538 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
4539 if (last_is_slash) {
4540 return nullptr; // Don't permit consecutive slashes
4541 }
4542 last_is_slash = true;
4543 continue;
4544 }
4545 }
4546 else {
4547 jint unicode_ch;
4548 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4549 p = tmp_p;
4550 last_is_slash = false;
4551 // Check if ch is Java identifier start or is Java identifier part
4552 // 4672820: call java.lang.Character methods directly without generating separate tables.
4553 EXCEPTION_MARK;
4554 // return value
4555 JavaValue result(T_BOOLEAN);
4556 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
4557 JavaCallArguments args;
4558 args.push_int(unicode_ch);
4559
4560 if (not_first_ch) {
4561 // public static boolean isJavaIdentifierPart(char ch);
4562 JavaCalls::call_static(&result,
4563 vmClasses::Character_klass(),
4564 vmSymbols::isJavaIdentifierPart_name(),
4565 vmSymbols::int_bool_signature(),
4566 &args,
4567 THREAD);
4568 } else {
4569 // public static boolean isJavaIdentifierStart(char ch);
4570 JavaCalls::call_static(&result,
4571 vmClasses::Character_klass(),
4572 vmSymbols::isJavaIdentifierStart_name(),
4573 vmSymbols::int_bool_signature(),
4574 &args,
4575 THREAD);
4576 }
4577 if (HAS_PENDING_EXCEPTION) {
4578 CLEAR_PENDING_EXCEPTION;
4579 return nullptr;
4580 }
4581 if(result.get_jboolean()) {
4582 continue;
4583 }
4584 }
4585 return (not_first_ch) ? old_p : nullptr;
4586 }
4587 return (not_first_ch && !last_is_slash) ? p : nullptr;
4588 }
4589
4590 // Take pointer to a UTF8 byte string (not NUL-terminated).
4591 // Skip over the longest part of the string that could
4592 // be taken as a field signature. Allow "void" if void_ok.
4593 // Return a pointer to just past the signature.
4594 // Return null if no legal signature is found.
4595 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4596 bool void_ok,
4597 unsigned int length,
4598 TRAPS) const {
4599 unsigned int array_dim = 0;
4600 while (length > 0) {
4601 switch (signature[0]) {
4602 case JVM_SIGNATURE_VOID: if (!void_ok) { return nullptr; }
4603 case JVM_SIGNATURE_BOOLEAN:
4604 case JVM_SIGNATURE_BYTE:
4605 case JVM_SIGNATURE_CHAR:
4606 case JVM_SIGNATURE_SHORT:
4607 case JVM_SIGNATURE_INT:
4608 case JVM_SIGNATURE_FLOAT:
4609 case JVM_SIGNATURE_LONG:
4610 case JVM_SIGNATURE_DOUBLE:
4611 return signature + 1;
4612 case JVM_SIGNATURE_CLASS: {
4613 if (_major_version < JAVA_1_5_VERSION) {
4614 // Skip over the class name if one is there
4615 const char* const p = skip_over_field_name(signature + 1, true, --length);
4616
4617 // The next character better be a semicolon
4618 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
4619 return p + 1;
4620 }
4621 }
4622 else {
4623 // Skip leading 'L' and ignore first appearance of ';'
4624 signature++;
4625 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4626 // Format check signature
4627 if (c != nullptr) {
4628 int newlen = pointer_delta_as_int(c, (char*) signature);
4629 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4630 if (!legal) {
4631 classfile_parse_error("Class name is empty or contains illegal character "
4632 "in descriptor in class file %s",
4633 THREAD);
4634 return nullptr;
4635 }
4636 return signature + newlen + 1;
4637 }
4638 }
4639 return nullptr;
4640 }
4641 case JVM_SIGNATURE_ARRAY:
4642 array_dim++;
4643 if (array_dim > 255) {
4644 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4645 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
4646 return nullptr;
4647 }
4648 // The rest of what's there better be a legal signature
4649 signature++;
4650 length--;
4651 void_ok = false;
4652 break;
4653 default:
4654 return nullptr;
4655 }
4656 }
4657 return nullptr;
4658 }
4659
4660 // Checks if name is a legal class name.
4661 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4662 if (!_need_verify || _relax_verify) { return; }
4663
4664 assert(name->refcount() > 0, "symbol must be kept alive");
4665 char* bytes = (char*)name->bytes();
4666 unsigned int length = name->utf8_length();
4667 bool legal = false;
4668
4669 if (length > 0) {
4670 const char* p;
4671 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4672 p = skip_over_field_signature(bytes, false, length, CHECK);
4673 legal = (p != nullptr) && ((p - bytes) == (int)length);
4674 } else if (_major_version < JAVA_1_5_VERSION) {
4675 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4676 p = skip_over_field_name(bytes, true, length);
4677 legal = (p != nullptr) && ((p - bytes) == (int)length);
4678 }
4679 } else {
4680 // 4900761: relax the constraints based on JSR202 spec
4681 // Class names may be drawn from the entire Unicode character set.
4682 // Identifiers between '/' must be unqualified names.
4683 // The utf8 string has been verified when parsing cpool entries.
4684 legal = verify_unqualified_name(bytes, length, LegalClass);
4685 }
4686 }
4687 if (!legal) {
4688 ResourceMark rm(THREAD);
4689 assert(_class_name != nullptr, "invariant");
4690 Exceptions::fthrow(
4691 THREAD_AND_LOCATION,
4692 vmSymbols::java_lang_ClassFormatError(),
4693 "Illegal class name \"%.*s\" in class file %s", length, bytes,
4694 _class_name->as_C_string()
4695 );
4696 return;
4697 }
4698 }
4699
4700 // Checks if name is a legal field name.
4701 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4702 if (!_need_verify || _relax_verify) { return; }
4703
4704 char* bytes = (char*)name->bytes();
4705 unsigned int length = name->utf8_length();
4706 bool legal = false;
4707
4708 if (length > 0) {
4709 if (_major_version < JAVA_1_5_VERSION) {
4710 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4711 const char* p = skip_over_field_name(bytes, false, length);
4712 legal = (p != nullptr) && ((p - bytes) == (int)length);
4713 }
4714 } else {
4715 // 4881221: relax the constraints based on JSR202 spec
4716 legal = verify_unqualified_name(bytes, length, LegalField);
4717 }
4718 }
4719
4720 if (!legal) {
4721 ResourceMark rm(THREAD);
4722 assert(_class_name != nullptr, "invariant");
4723 Exceptions::fthrow(
4724 THREAD_AND_LOCATION,
4725 vmSymbols::java_lang_ClassFormatError(),
4726 "Illegal field name \"%.*s\" in class %s", length, bytes,
4727 _class_name->as_C_string()
4728 );
4729 return;
4730 }
4731 }
4732
4733 // Checks if name is a legal method name.
4734 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4735 if (!_need_verify || _relax_verify) { return; }
4736
4737 assert(name != nullptr, "method name is null");
4738 char* bytes = (char*)name->bytes();
4739 unsigned int length = name->utf8_length();
4740 bool legal = false;
4741
4742 if (length > 0) {
4743 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
4744 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4745 legal = true;
4746 }
4747 } else if (_major_version < JAVA_1_5_VERSION) {
4748 const char* p;
4749 p = skip_over_field_name(bytes, false, length);
4750 legal = (p != nullptr) && ((p - bytes) == (int)length);
4751 } else {
4752 // 4881221: relax the constraints based on JSR202 spec
4753 legal = verify_unqualified_name(bytes, length, LegalMethod);
4754 }
4755 }
4756
4757 if (!legal) {
4758 ResourceMark rm(THREAD);
4759 assert(_class_name != nullptr, "invariant");
4760 Exceptions::fthrow(
4761 THREAD_AND_LOCATION,
4762 vmSymbols::java_lang_ClassFormatError(),
4763 "Illegal method name \"%.*s\" in class %s", length, bytes,
4764 _class_name->as_C_string()
4765 );
4766 return;
4767 }
4768 }
4769
4770
4771 // Checks if signature is a legal field signature.
4772 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
4773 const Symbol* signature,
4774 TRAPS) const {
4775 if (!_need_verify) { return; }
4776
4777 const char* const bytes = (const char*)signature->bytes();
4778 const unsigned int length = signature->utf8_length();
4779 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
4780
4781 if (p == nullptr || (p - bytes) != (int)length) {
4782 throwIllegalSignature("Field", name, signature, CHECK);
4783 }
4784 }
4785
4786 // Check that the signature is compatible with the method name. For example,
4787 // check that <init> has a void signature.
4788 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
4789 const Symbol* signature,
4790 TRAPS) const {
4791 if (!_need_verify) {
4792 return;
4793 }
4794
4795 // Class initializers cannot have args for class format version >= 51.
4796 if (name == vmSymbols::class_initializer_name() &&
4797 signature != vmSymbols::void_method_signature() &&
4798 _major_version >= JAVA_7_VERSION) {
4799 throwIllegalSignature("Method", name, signature, THREAD);
4800 return;
4801 }
4802
4803 int sig_length = signature->utf8_length();
4804 if (name->utf8_length() > 0 &&
4805 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
4806 sig_length > 0 &&
4807 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
4808 throwIllegalSignature("Method", name, signature, THREAD);
4809 }
4810 }
4811
4812 // Checks if signature is a legal method signature.
4813 // Returns number of parameters
4814 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
4815 const Symbol* signature,
4816 TRAPS) const {
4817 if (!_need_verify) {
4818 // make sure caller's args_size will be less than 0 even for non-static
4819 // method so it will be recomputed in compute_size_of_parameters().
4820 return -2;
4821 }
4822
4823 unsigned int args_size = 0;
4824 const char* p = (const char*)signature->bytes();
4825 unsigned int length = signature->utf8_length();
4826 const char* nextp;
4827
4828 // The first character must be a '('
4829 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4830 length--;
4831 // Skip over legal field signatures
4832 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4833 while ((length > 0) && (nextp != nullptr)) {
4834 args_size++;
4835 if (p[0] == 'J' || p[0] == 'D') {
4836 args_size++;
4837 }
4838 length -= pointer_delta_as_int(nextp, p);
4839 p = nextp;
4840 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4841 }
4842 // The first non-signature thing better be a ')'
4843 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4844 length--;
4845 // Now we better just have a return value
4846 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4847 if (nextp && ((int)length == (nextp - p))) {
4848 return args_size;
4849 }
4850 }
4851 }
4852 // Report error
4853 throwIllegalSignature("Method", name, signature, THREAD);
4854 return 0;
4855 }
4856
4857 int ClassFileParser::static_field_size() const {
4858 assert(_field_info != nullptr, "invariant");
4859 return _field_info->_static_field_size;
4860 }
4861
4862 int ClassFileParser::total_oop_map_count() const {
4863 assert(_field_info != nullptr, "invariant");
4864 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
4865 }
4866
4867 jint ClassFileParser::layout_size() const {
4868 assert(_field_info != nullptr, "invariant");
4869 return _field_info->_instance_size;
4870 }
4871
4872 static void check_methods_for_intrinsics(const InstanceKlass* ik,
4873 const Array<Method*>* methods) {
4874 assert(ik != nullptr, "invariant");
4875 assert(methods != nullptr, "invariant");
4876
4877 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4878 // (We used to do this lazily, but now we query it in Rewriter,
4879 // which is eagerly done for every method, so we might as well do it now,
4880 // when everything is fresh in memory.)
4881 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
4882
4883 if (klass_id != vmSymbolID::NO_SID) {
4884 for (int j = 0; j < methods->length(); ++j) {
4885 Method* method = methods->at(j);
4886 method->init_intrinsic_id(klass_id);
4887
4888 if (CheckIntrinsics) {
4889 // Check if an intrinsic is defined for method 'method',
4890 // but the method is not annotated with @IntrinsicCandidate.
4891 if (method->intrinsic_id() != vmIntrinsics::_none &&
4892 !method->intrinsic_candidate()) {
4893 tty->print("Compiler intrinsic is defined for method [%s], "
4894 "but the method is not annotated with @IntrinsicCandidate.%s",
4895 method->name_and_sig_as_C_string(),
4896 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
4897 );
4898 tty->cr();
4899 DEBUG_ONLY(vm_exit(1));
4900 }
4901 // Check is the method 'method' is annotated with @IntrinsicCandidate,
4902 // but there is no intrinsic available for it.
4903 if (method->intrinsic_candidate() &&
4904 method->intrinsic_id() == vmIntrinsics::_none) {
4905 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
4906 "but no compiler intrinsic is defined for the method.%s",
4907 method->name_and_sig_as_C_string(),
4908 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4909 );
4910 tty->cr();
4911 DEBUG_ONLY(vm_exit(1));
4912 }
4913 }
4914 } // end for
4915
4916 #ifdef ASSERT
4917 if (CheckIntrinsics) {
4918 // Check for orphan methods in the current class. A method m
4919 // of a class C is orphan if an intrinsic is defined for method m,
4920 // but class C does not declare m.
4921 // The check is potentially expensive, therefore it is available
4922 // only in debug builds.
4923
4924 for (auto id : EnumRange<vmIntrinsicID>{}) {
4925 if (vmIntrinsics::_compiledLambdaForm == id) {
4926 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
4927 // generated for the JVM from a LambdaForm and therefore no method
4928 // is defined for it.
4929 continue;
4930 }
4931 if (vmIntrinsics::_blackhole == id) {
4932 // The _blackhole intrinsic is a special marker. No explicit method
4933 // is defined for it.
4934 continue;
4935 }
4936
4937 if (vmIntrinsics::class_for(id) == klass_id) {
4938 // Check if the current class contains a method with the same
4939 // name, flags, signature.
4940 bool match = false;
4941 for (int j = 0; j < methods->length(); ++j) {
4942 const Method* method = methods->at(j);
4943 if (method->intrinsic_id() == id) {
4944 match = true;
4945 break;
4946 }
4947 }
4948
4949 if (!match) {
4950 char buf[1000];
4951 tty->print("Compiler intrinsic is defined for method [%s], "
4952 "but the method is not available in class [%s].%s",
4953 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
4954 ik->name()->as_C_string(),
4955 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4956 );
4957 tty->cr();
4958 DEBUG_ONLY(vm_exit(1));
4959 }
4960 }
4961 } // end for
4962 } // CheckIntrinsics
4963 #endif // ASSERT
4964 }
4965 }
4966
4967 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
4968 const ClassInstanceInfo& cl_inst_info,
4969 TRAPS) {
4970 if (_klass != nullptr) {
4971 return _klass;
4972 }
4973
4974 InstanceKlass* const ik =
4975 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
4976
4977 if (is_hidden()) {
4978 mangle_hidden_class_name(ik);
4979 }
4980
4981 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
4982
4983 assert(_klass == ik, "invariant");
4984
4985 return ik;
4986 }
4987
4988 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
4989 bool changed_by_loadhook,
4990 const ClassInstanceInfo& cl_inst_info,
4991 TRAPS) {
4992 assert(ik != nullptr, "invariant");
4993
4994 // Set name and CLD before adding to CLD
4995 ik->set_class_loader_data(_loader_data);
4996 ik->set_name(_class_name);
4997
4998 // Add all classes to our internal class loader list here,
4999 // including classes in the bootstrap (null) class loader.
5000 const bool publicize = !is_internal();
5001
5002 _loader_data->add_class(ik, publicize);
5003
5004 set_klass_to_deallocate(ik);
5005
5006 assert(_field_info != nullptr, "invariant");
5007 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5008 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5009 "sanity");
5010
5011 assert(ik->is_instance_klass(), "sanity");
5012 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5013
5014 // Fill in information already parsed
5015 ik->set_should_verify_class(_need_verify);
5016
5017 // Not yet: supers are done below to support the new subtype-checking fields
5018 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5019 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5020 ik->set_static_oop_field_count(_static_oop_count);
5021
5022 // this transfers ownership of a lot of arrays from
5023 // the parser onto the InstanceKlass*
5024 apply_parsed_class_metadata(ik, _java_fields_count);
5025
5026 // can only set dynamic nest-host after static nest information is set
5027 if (cl_inst_info.dynamic_nest_host() != nullptr) {
5028 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5029 }
5030
5031 // note that is not safe to use the fields in the parser from this point on
5032 assert(nullptr == _cp, "invariant");
5033 assert(nullptr == _fieldinfo_stream, "invariant");
5034 assert(nullptr == _fields_status, "invariant");
5035 assert(nullptr == _methods, "invariant");
5036 assert(nullptr == _inner_classes, "invariant");
5037 assert(nullptr == _nest_members, "invariant");
5038 assert(nullptr == _combined_annotations, "invariant");
5039 assert(nullptr == _record_components, "invariant");
5040 assert(nullptr == _permitted_subclasses, "invariant");
5041
5042 if (_has_localvariable_table) {
5043 ik->set_has_localvariable_table(true);
5044 }
5045
5046 if (_has_final_method) {
5047 ik->set_has_final_method();
5048 }
5049
5050 ik->copy_method_ordering(_method_ordering, CHECK);
5051 // The InstanceKlass::_methods_jmethod_ids cache
5052 // is managed on the assumption that the initial cache
5053 // size is equal to the number of methods in the class. If
5054 // that changes, then InstanceKlass::idnum_can_increment()
5055 // has to be changed accordingly.
5056 ik->set_initial_method_idnum(checked_cast<u2>(ik->methods()->length()));
5057
5058 ik->set_this_class_index(_this_class_index);
5059
5060 if (_is_hidden) {
5061 // _this_class_index is a CONSTANT_Class entry that refers to this
5062 // hidden class itself. If this class needs to refer to its own methods
5063 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5064 // _this_class_index. However, because this class is hidden (it's
5065 // not stored in SystemDictionary), _this_class_index cannot be resolved
5066 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5067 // Therefore, we must eagerly resolve _this_class_index now.
5068 ik->constants()->klass_at_put(_this_class_index, ik);
5069 }
5070
5071 ik->set_minor_version(_minor_version);
5072 ik->set_major_version(_major_version);
5073 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5074 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5075
5076 assert(!_is_hidden || ik->is_hidden(), "must be set already");
5077
5078 // Set PackageEntry for this_klass
5079 oop cl = ik->class_loader();
5080 Handle clh = Handle(THREAD, cl);
5081 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5082 ik->set_package(cld, nullptr, CHECK);
5083
5084 const Array<Method*>* const methods = ik->methods();
5085 assert(methods != nullptr, "invariant");
5086 const int methods_len = methods->length();
5087
5088 check_methods_for_intrinsics(ik, methods);
5089
5090 // Fill in field values obtained by parse_classfile_attributes
5091 if (_parsed_annotations->has_any_annotations()) {
5092 _parsed_annotations->apply_to(ik);
5093 }
5094
5095 apply_parsed_class_attributes(ik);
5096
5097 // Miranda methods
5098 if ((_num_miranda_methods > 0) ||
5099 // if this class introduced new miranda methods or
5100 (_super_klass != nullptr && _super_klass->has_miranda_methods())
5101 // super class exists and this class inherited miranda methods
5102 ) {
5103 ik->set_has_miranda_methods(); // then set a flag
5104 }
5105
5106 // Fill in information needed to compute superclasses.
5107 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5108 ik->set_transitive_interfaces(_transitive_interfaces);
5109 ik->set_local_interfaces(_local_interfaces);
5110 _transitive_interfaces = nullptr;
5111 _local_interfaces = nullptr;
5112
5113 // Initialize itable offset tables
5114 klassItable::setup_itable_offset_table(ik);
5115
5116 // Compute transitive closure of interfaces this class implements
5117 // Do final class setup
5118 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5119 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5120 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5121 }
5122
5123 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5124 ( _super_klass != nullptr && _super_klass->has_contended_annotations())) {
5125 ik->set_has_contended_annotations(true);
5126 }
5127
5128 // Fill in has_finalizer and layout_helper
5129 set_precomputed_flags(ik);
5130
5131 // check if this class can access its super class
5132 check_super_class_access(ik, CHECK);
5133
5134 // check if this class can access its superinterfaces
5135 check_super_interface_access(ik, CHECK);
5136
5137 // check if this class overrides any final method
5138 check_final_method_override(ik, CHECK);
5139
5140 // reject static interface methods prior to Java 8
5141 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5142 check_illegal_static_method(ik, CHECK);
5143 }
5144
5145 // Obtain this_klass' module entry
5146 ModuleEntry* module_entry = ik->module();
5147 assert(module_entry != nullptr, "module_entry should always be set");
5148
5149 // Obtain java.lang.Module
5150 Handle module_handle(THREAD, module_entry->module());
5151
5152 // Allocate mirror and initialize static fields
5153 // The create_mirror() call will also call compute_modifiers()
5154 java_lang_Class::create_mirror(ik,
5155 Handle(THREAD, _loader_data->class_loader()),
5156 module_handle,
5157 _protection_domain,
5158 cl_inst_info.class_data(),
5159 CHECK);
5160
5161 assert(_all_mirandas != nullptr, "invariant");
5162
5163 // Generate any default methods - default methods are public interface methods
5164 // that have a default implementation. This is new with Java 8.
5165 if (_has_nonstatic_concrete_methods) {
5166 DefaultMethods::generate_default_methods(ik,
5167 _all_mirandas,
5168 CHECK);
5169 }
5170
5171 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5172 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5173 !module_entry->has_default_read_edges()) {
5174 if (!module_entry->set_has_default_read_edges()) {
5175 // We won a potential race
5176 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5177 }
5178 }
5179
5180 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5181
5182 if (!is_internal()) {
5183 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5184
5185 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5186 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5187 log_is_enabled(Info, class, preview)) {
5188 ResourceMark rm;
5189 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5190 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5191 }
5192
5193 if (log_is_enabled(Debug, class, resolve)) {
5194 ResourceMark rm;
5195 // print out the superclass.
5196 const char * from = ik->external_name();
5197 if (ik->java_super() != nullptr) {
5198 log_debug(class, resolve)("%s %s (super)",
5199 from,
5200 ik->java_super()->external_name());
5201 }
5202 // print out each of the interface classes referred to by this class.
5203 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5204 if (local_interfaces != nullptr) {
5205 const int length = local_interfaces->length();
5206 for (int i = 0; i < length; i++) {
5207 const InstanceKlass* const k = local_interfaces->at(i);
5208 const char * to = k->external_name();
5209 log_debug(class, resolve)("%s %s (interface)", from, to);
5210 }
5211 }
5212 }
5213 }
5214
5215 JFR_ONLY(INIT_ID(ik);)
5216
5217 // If we reach here, all is well.
5218 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5219 // in order for it to not be destroyed in the ClassFileParser destructor.
5220 set_klass_to_deallocate(nullptr);
5221
5222 // it's official
5223 set_klass(ik);
5224
5225 debug_only(ik->verify();)
5226 }
5227
5228 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5229 // Decrement the refcount in the old name, since we're clobbering it.
5230 _class_name->decrement_refcount();
5231
5232 _class_name = new_class_name;
5233 // Increment the refcount of the new name.
5234 // Now the ClassFileParser owns this name and will decrement in
5235 // the destructor.
5236 _class_name->increment_refcount();
5237 }
5238
5239 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5240 bool trusted = loader_data->is_boot_class_loader_data() ||
5241 loader_data->is_platform_class_loader_data();
5242 bool need_verify =
5243 // verifyAll
5244 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5245 // verifyRemote
5246 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5247 return !need_verify;
5248 }
5249
5250 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5251 Symbol* name,
5252 ClassLoaderData* loader_data,
5253 const ClassLoadInfo* cl_info,
5254 Publicity pub_level,
5255 TRAPS) :
5256 _stream(stream),
5257 _class_name(nullptr),
5258 _loader_data(loader_data),
5259 _is_hidden(cl_info->is_hidden()),
5260 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5261 _orig_cp_size(0),
5262 _static_oop_count(0),
5263 _super_klass(),
5264 _cp(nullptr),
5265 _fieldinfo_stream(nullptr),
5266 _fields_status(nullptr),
5267 _methods(nullptr),
5268 _inner_classes(nullptr),
5269 _nest_members(nullptr),
5270 _nest_host(0),
5271 _permitted_subclasses(nullptr),
5272 _record_components(nullptr),
5273 _local_interfaces(nullptr),
5274 _transitive_interfaces(nullptr),
5275 _combined_annotations(nullptr),
5276 _class_annotations(nullptr),
5277 _class_type_annotations(nullptr),
5278 _fields_annotations(nullptr),
5279 _fields_type_annotations(nullptr),
5280 _klass(nullptr),
5281 _klass_to_deallocate(nullptr),
5282 _parsed_annotations(nullptr),
5283 _field_info(nullptr),
5284 _temp_field_info(nullptr),
5285 _method_ordering(nullptr),
5286 _all_mirandas(nullptr),
5287 _vtable_size(0),
5288 _itable_size(0),
5289 _num_miranda_methods(0),
5290 _protection_domain(cl_info->protection_domain()),
5291 _access_flags(),
5292 _pub_level(pub_level),
5293 _bad_constant_seen(0),
5294 _synthetic_flag(false),
5295 _sde_length(false),
5296 _sde_buffer(nullptr),
5297 _sourcefile_index(0),
5298 _generic_signature_index(0),
5299 _major_version(0),
5300 _minor_version(0),
5301 _this_class_index(0),
5302 _super_class_index(0),
5303 _itfs_len(0),
5304 _java_fields_count(0),
5305 _need_verify(false),
5306 _relax_verify(false),
5307 _has_nonstatic_concrete_methods(false),
5308 _declares_nonstatic_concrete_methods(false),
5309 _has_localvariable_table(false),
5310 _has_final_method(false),
5311 _has_contended_fields(false),
5312 _has_finalizer(false),
5313 _has_empty_finalizer(false),
5314 _max_bootstrap_specifier_index(-1) {
5315
5316 _class_name = name != nullptr ? name : vmSymbols::unknown_class_name();
5317 _class_name->increment_refcount();
5318
5319 assert(_loader_data != nullptr, "invariant");
5320 assert(stream != nullptr, "invariant");
5321 assert(_stream != nullptr, "invariant");
5322 assert(_stream->buffer() == _stream->current(), "invariant");
5323 assert(_class_name != nullptr, "invariant");
5324 assert(0 == _access_flags.as_int(), "invariant");
5325
5326 // Figure out whether we can skip format checking (matching classic VM behavior)
5327 if (CDSConfig::is_dumping_static_archive()) {
5328 // verify == true means it's a 'remote' class (i.e., non-boot class)
5329 // Verification decision is based on BytecodeVerificationRemote flag
5330 // for those classes.
5331 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5332 BytecodeVerificationLocal;
5333 }
5334 else {
5335 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5336 stream->need_verify());
5337 }
5338
5339 // synch back verification state to stream
5340 stream->set_verify(_need_verify);
5341
5342 // Check if verification needs to be relaxed for this class file
5343 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5344 _relax_verify = relax_format_check_for(_loader_data);
5345
5346 parse_stream(stream, CHECK);
5347
5348 post_process_parsed_stream(stream, _cp, CHECK);
5349 }
5350
5351 void ClassFileParser::clear_class_metadata() {
5352 // metadata created before the instance klass is created. Must be
5353 // deallocated if classfile parsing returns an error.
5354 _cp = nullptr;
5355 _fieldinfo_stream = nullptr;
5356 _fields_status = nullptr;
5357 _methods = nullptr;
5358 _inner_classes = nullptr;
5359 _nest_members = nullptr;
5360 _permitted_subclasses = nullptr;
5361 _combined_annotations = nullptr;
5362 _class_annotations = _class_type_annotations = nullptr;
5363 _fields_annotations = _fields_type_annotations = nullptr;
5364 _record_components = nullptr;
5365 }
5366
5367 // Destructor to clean up
5368 ClassFileParser::~ClassFileParser() {
5369 _class_name->decrement_refcount();
5370
5371 if (_cp != nullptr) {
5372 MetadataFactory::free_metadata(_loader_data, _cp);
5373 }
5374
5375 if (_fieldinfo_stream != nullptr) {
5376 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_stream);
5377 }
5378
5379 if (_fields_status != nullptr) {
5380 MetadataFactory::free_array<FieldStatus>(_loader_data, _fields_status);
5381 }
5382
5383 if (_methods != nullptr) {
5384 // Free methods
5385 InstanceKlass::deallocate_methods(_loader_data, _methods);
5386 }
5387
5388 // beware of the Universe::empty_blah_array!!
5389 if (_inner_classes != nullptr && _inner_classes != Universe::the_empty_short_array()) {
5390 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5391 }
5392
5393 if (_nest_members != nullptr && _nest_members != Universe::the_empty_short_array()) {
5394 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5395 }
5396
5397 if (_record_components != nullptr) {
5398 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5399 }
5400
5401 if (_permitted_subclasses != nullptr && _permitted_subclasses != Universe::the_empty_short_array()) {
5402 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5403 }
5404
5405 // Free interfaces
5406 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5407 _local_interfaces, _transitive_interfaces);
5408
5409 if (_combined_annotations != nullptr) {
5410 // After all annotations arrays have been created, they are installed into the
5411 // Annotations object that will be assigned to the InstanceKlass being created.
5412
5413 // Deallocate the Annotations object and the installed annotations arrays.
5414 _combined_annotations->deallocate_contents(_loader_data);
5415
5416 // If the _combined_annotations pointer is non-null,
5417 // then the other annotations fields should have been cleared.
5418 assert(_class_annotations == nullptr, "Should have been cleared");
5419 assert(_class_type_annotations == nullptr, "Should have been cleared");
5420 assert(_fields_annotations == nullptr, "Should have been cleared");
5421 assert(_fields_type_annotations == nullptr, "Should have been cleared");
5422 } else {
5423 // If the annotations arrays were not installed into the Annotations object,
5424 // then they have to be deallocated explicitly.
5425 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5426 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5427 Annotations::free_contents(_loader_data, _fields_annotations);
5428 Annotations::free_contents(_loader_data, _fields_type_annotations);
5429 }
5430
5431 clear_class_metadata();
5432 _transitive_interfaces = nullptr;
5433 _local_interfaces = nullptr;
5434
5435 // deallocate the klass if already created. Don't directly deallocate, but add
5436 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5437 // at a safepoint.
5438 if (_klass_to_deallocate != nullptr) {
5439 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5440 }
5441 }
5442
5443 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5444 TRAPS) {
5445
5446 assert(stream != nullptr, "invariant");
5447 assert(_class_name != nullptr, "invariant");
5448
5449 // BEGIN STREAM PARSING
5450 stream->guarantee_more(8, CHECK); // magic, major, minor
5451 // Magic value
5452 const u4 magic = stream->get_u4_fast();
5453 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5454 "Incompatible magic value %u in class file %s",
5455 magic, CHECK);
5456
5457 // Version numbers
5458 _minor_version = stream->get_u2_fast();
5459 _major_version = stream->get_u2_fast();
5460
5461 // Check version numbers - we check this even with verifier off
5462 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5463
5464 stream->guarantee_more(3, CHECK); // length, first cp tag
5465 u2 cp_size = stream->get_u2_fast();
5466
5467 guarantee_property(
5468 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5469 cp_size, CHECK);
5470
5471 _orig_cp_size = cp_size;
5472 if (is_hidden()) { // Add a slot for hidden class name.
5473 cp_size++;
5474 }
5475
5476 _cp = ConstantPool::allocate(_loader_data,
5477 cp_size,
5478 CHECK);
5479
5480 ConstantPool* const cp = _cp;
5481
5482 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
5483
5484 assert(cp_size == (u2)cp->length(), "invariant");
5485
5486 // ACCESS FLAGS
5487 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5488
5489 // Access flags
5490 jint flags;
5491 // JVM_ACC_MODULE is defined in JDK-9 and later.
5492 if (_major_version >= JAVA_9_VERSION) {
5493 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5494 } else {
5495 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5496 }
5497
5498 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5499 // Set abstract bit for old class files for backward compatibility
5500 flags |= JVM_ACC_ABSTRACT;
5501 }
5502
5503 verify_legal_class_modifiers(flags, CHECK);
5504
5505 short bad_constant = class_bad_constant_seen();
5506 if (bad_constant != 0) {
5507 // Do not throw CFE until after the access_flags are checked because if
5508 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5509 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5510 return;
5511 }
5512
5513 _access_flags.set_flags(flags);
5514
5515 // This class and superclass
5516 _this_class_index = stream->get_u2_fast();
5517 guarantee_property(
5518 valid_cp_range(_this_class_index, cp_size) &&
5519 cp->tag_at(_this_class_index).is_unresolved_klass(),
5520 "Invalid this class index %u in constant pool in class file %s",
5521 _this_class_index, CHECK);
5522
5523 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5524 assert(class_name_in_cp != nullptr, "class_name can't be null");
5525
5526 // Don't need to check whether this class name is legal or not.
5527 // It has been checked when constant pool is parsed.
5528 // However, make sure it is not an array type.
5529 if (_need_verify) {
5530 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
5531 "Bad class name in class file %s",
5532 CHECK);
5533 }
5534
5535 #ifdef ASSERT
5536 // Basic sanity checks
5537 if (_is_hidden) {
5538 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
5539 }
5540 #endif
5541
5542 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
5543
5544 if (_is_hidden) {
5545 assert(_class_name != nullptr, "Unexpected null _class_name");
5546 #ifdef ASSERT
5547 if (_need_verify) {
5548 verify_legal_class_name(_class_name, CHECK);
5549 }
5550 #endif
5551
5552 } else {
5553 // Check if name in class file matches given name
5554 if (_class_name != class_name_in_cp) {
5555 if (_class_name != vmSymbols::unknown_class_name()) {
5556 ResourceMark rm(THREAD);
5557 Exceptions::fthrow(THREAD_AND_LOCATION,
5558 vmSymbols::java_lang_NoClassDefFoundError(),
5559 "%s (wrong name: %s)",
5560 _class_name->as_C_string(),
5561 class_name_in_cp->as_C_string()
5562 );
5563 return;
5564 } else {
5565 // The class name was not known by the caller so we set it from
5566 // the value in the CP.
5567 update_class_name(class_name_in_cp);
5568 }
5569 // else nothing to do: the expected class name matches what is in the CP
5570 }
5571 }
5572
5573 // Verification prevents us from creating names with dots in them, this
5574 // asserts that that's the case.
5575 assert(is_internal_format(_class_name), "external class name format used internally");
5576
5577 if (!is_internal()) {
5578 LogTarget(Debug, class, preorder) lt;
5579 if (lt.is_enabled()){
5580 ResourceMark rm(THREAD);
5581 LogStream ls(lt);
5582 ls.print("%s", _class_name->as_klass_external_name());
5583 if (stream->source() != nullptr) {
5584 ls.print(" source: %s", stream->source());
5585 }
5586 ls.cr();
5587 }
5588 }
5589
5590 // SUPERKLASS
5591 _super_class_index = stream->get_u2_fast();
5592 _super_klass = parse_super_class(cp,
5593 _super_class_index,
5594 _need_verify,
5595 CHECK);
5596
5597 // Interfaces
5598 _itfs_len = stream->get_u2_fast();
5599 parse_interfaces(stream,
5600 _itfs_len,
5601 cp,
5602 &_has_nonstatic_concrete_methods,
5603 CHECK);
5604
5605 assert(_local_interfaces != nullptr, "invariant");
5606
5607 // Fields (offsets are filled in later)
5608 parse_fields(stream,
5609 _access_flags.is_interface(),
5610 cp,
5611 cp_size,
5612 &_java_fields_count,
5613 CHECK);
5614
5615 assert(_temp_field_info != nullptr, "invariant");
5616
5617 // Methods
5618 parse_methods(stream,
5619 _access_flags.is_interface(),
5620 &_has_localvariable_table,
5621 &_has_final_method,
5622 &_declares_nonstatic_concrete_methods,
5623 CHECK);
5624
5625 assert(_methods != nullptr, "invariant");
5626
5627 if (_declares_nonstatic_concrete_methods) {
5628 _has_nonstatic_concrete_methods = true;
5629 }
5630
5631 // Additional attributes/annotations
5632 _parsed_annotations = new ClassAnnotationCollector();
5633 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5634
5635 assert(_inner_classes != nullptr, "invariant");
5636
5637 // Finalize the Annotations metadata object,
5638 // now that all annotation arrays have been created.
5639 create_combined_annotations(CHECK);
5640
5641 // Make sure this is the end of class file stream
5642 guarantee_property(stream->at_eos(),
5643 "Extra bytes at the end of class file %s",
5644 CHECK);
5645
5646 // all bytes in stream read and parsed
5647 }
5648
5649 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
5650 ResourceMark rm;
5651 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
5652 // use a '/' because that confuses finding the class's package. Also, can't
5653 // use an illegal char such as ';' because that causes serialization issues
5654 // and issues with hidden classes that create their own hidden classes.
5655 char addr_buf[20];
5656 if (CDSConfig::is_dumping_static_archive()) {
5657 // We want stable names for the archived hidden classes (only for static
5658 // archive for now). Spaces under default_SharedBaseAddress() will be
5659 // occupied by the archive at run time, so we know that no dynamically
5660 // loaded InstanceKlass will be placed under there.
5661 static volatile size_t counter = 0;
5662 Atomic::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
5663 size_t new_id = Atomic::add(&counter, (size_t)1);
5664 jio_snprintf(addr_buf, 20, SIZE_FORMAT_X, new_id);
5665 } else {
5666 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
5667 }
5668 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
5669 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
5670 jio_snprintf(new_name, new_name_len, "%s+%s",
5671 _class_name->as_C_string(), addr_buf);
5672 update_class_name(SymbolTable::new_symbol(new_name));
5673
5674 // Add a Utf8 entry containing the hidden name.
5675 assert(_class_name != nullptr, "Unexpected null _class_name");
5676 int hidden_index = _orig_cp_size; // this is an extra slot we added
5677 _cp->symbol_at_put(hidden_index, _class_name);
5678
5679 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
5680 // We have to update the resolved_klass_index and the name_index together
5681 // so extract the existing resolved_klass_index first.
5682 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
5683 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
5684 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
5685 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
5686 "Bad name_index");
5687 }
5688
5689 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5690 ConstantPool* cp,
5691 TRAPS) {
5692 assert(stream != nullptr, "invariant");
5693 assert(stream->at_eos(), "invariant");
5694 assert(cp != nullptr, "invariant");
5695 assert(_loader_data != nullptr, "invariant");
5696
5697 if (_class_name == vmSymbols::java_lang_Object()) {
5698 guarantee_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
5699 "java.lang.Object cannot implement an interface in class file %s",
5700 CHECK);
5701 }
5702 // We check super class after class file is parsed and format is checked
5703 if (_super_class_index > 0 && nullptr == _super_klass) {
5704 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5705 if (_access_flags.is_interface()) {
5706 // Before attempting to resolve the superclass, check for class format
5707 // errors not checked yet.
5708 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5709 "Interfaces must have java.lang.Object as superclass in class file %s",
5710 CHECK);
5711 }
5712 Handle loader(THREAD, _loader_data->class_loader());
5713 if (loader.is_null() && super_class_name == vmSymbols::java_lang_Object()) {
5714 _super_klass = vmClasses::Object_klass();
5715 } else {
5716 _super_klass = (const InstanceKlass*)
5717 SystemDictionary::resolve_super_or_fail(_class_name,
5718 super_class_name,
5719 loader,
5720 _protection_domain,
5721 true,
5722 CHECK);
5723 }
5724 }
5725
5726 if (_super_klass != nullptr) {
5727 if (_super_klass->has_nonstatic_concrete_methods()) {
5728 _has_nonstatic_concrete_methods = true;
5729 }
5730
5731 if (_super_klass->is_interface()) {
5732 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
5733 return;
5734 }
5735 }
5736
5737 // Compute the transitive list of all unique interfaces implemented by this class
5738 _transitive_interfaces =
5739 compute_transitive_interfaces(_super_klass,
5740 _local_interfaces,
5741 _loader_data,
5742 CHECK);
5743
5744 assert(_transitive_interfaces != nullptr, "invariant");
5745
5746 // sort methods
5747 _method_ordering = sort_methods(_methods);
5748
5749 _all_mirandas = new GrowableArray<Method*>(20);
5750
5751 Handle loader(THREAD, _loader_data->class_loader());
5752 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5753 &_num_miranda_methods,
5754 _all_mirandas,
5755 _super_klass,
5756 _methods,
5757 _access_flags,
5758 _major_version,
5759 loader,
5760 _class_name,
5761 _local_interfaces);
5762
5763 // Size of Java itable (in words)
5764 _itable_size = _access_flags.is_interface() ? 0 :
5765 klassItable::compute_itable_size(_transitive_interfaces);
5766
5767 assert(_parsed_annotations != nullptr, "invariant");
5768
5769 _field_info = new FieldLayoutInfo();
5770 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, /*_fields*/ _temp_field_info,
5771 _parsed_annotations->is_contended(), _field_info);
5772 lb.build_layout();
5773
5774 int injected_fields_count = _temp_field_info->length() - _java_fields_count;
5775 _fieldinfo_stream =
5776 FieldInfoStream::create_FieldInfoStream(_temp_field_info, _java_fields_count,
5777 injected_fields_count, loader_data(), CHECK);
5778 _fields_status =
5779 MetadataFactory::new_array<FieldStatus>(_loader_data, _temp_field_info->length(),
5780 FieldStatus(0), CHECK);
5781 }
5782
5783 void ClassFileParser::set_klass(InstanceKlass* klass) {
5784
5785 #ifdef ASSERT
5786 if (klass != nullptr) {
5787 assert(nullptr == _klass, "leaking?");
5788 }
5789 #endif
5790
5791 _klass = klass;
5792 }
5793
5794 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5795
5796 #ifdef ASSERT
5797 if (klass != nullptr) {
5798 assert(nullptr == _klass_to_deallocate, "leaking?");
5799 }
5800 #endif
5801
5802 _klass_to_deallocate = klass;
5803 }
5804
5805 // Caller responsible for ResourceMark
5806 // clone stream with rewound position
5807 const ClassFileStream* ClassFileParser::clone_stream() const {
5808 assert(_stream != nullptr, "invariant");
5809
5810 return _stream->clone();
5811 }
5812
5813 ReferenceType ClassFileParser::super_reference_type() const {
5814 return _super_klass == nullptr ? REF_NONE : _super_klass->reference_type();
5815 }
5816
5817 bool ClassFileParser::is_instance_ref_klass() const {
5818 // Only the subclasses of j.l.r.Reference are InstanceRefKlass.
5819 // j.l.r.Reference itself is InstanceKlass because InstanceRefKlass denotes a
5820 // klass requiring special treatment in ref-processing. The abstract
5821 // j.l.r.Reference cannot be instantiated so doesn't partake in
5822 // ref-processing.
5823 return is_java_lang_ref_Reference_subclass();
5824 }
5825
5826 bool ClassFileParser::is_java_lang_ref_Reference_subclass() const {
5827 if (_super_klass == nullptr) {
5828 return false;
5829 }
5830
5831 if (_super_klass->name() == vmSymbols::java_lang_ref_Reference()) {
5832 // Direct subclass of j.l.r.Reference: Soft|Weak|Final|Phantom
5833 return true;
5834 }
5835
5836 return _super_klass->reference_type() != REF_NONE;
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