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 #ifdef ASSERT
415 PRAGMA_DIAG_PUSH
416 PRAGMA_FORMAT_NONLITERAL_IGNORED
417 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
418 ResourceMark rm(THREAD);
419 fatal(msg, _class_name->as_C_string());
420 }
421
422 void ClassFileParser::report_assert_property_failure(const char* msg,
423 int index,
424 TRAPS) const {
425 ResourceMark rm(THREAD);
426 fatal(msg, index, _class_name->as_C_string());
427 }
428 PRAGMA_DIAG_POP
429 #endif
430
431 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
432 ConstantPool* const cp,
433 const int length,
434 TRAPS) {
435 assert(cp != nullptr, "invariant");
436 assert(stream != nullptr, "invariant");
437
438 // parsing constant pool entries
439 parse_constant_pool_entries(stream, cp, length, CHECK);
440 if (class_bad_constant_seen() != 0) {
441 // a bad CP entry has been detected previously so stop parsing and just return.
442 return;
443 }
444
445 int index = 1; // declared outside of loops for portability
446 int num_klasses = 0;
447
448 // first verification pass - validate cross references
449 // and fixup class and string constants
450 for (index = 1; index < length; index++) { // Index 0 is unused
451 const jbyte tag = cp->tag_at(index).value();
452 switch (tag) {
453 case JVM_CONSTANT_Class: {
454 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
455 break;
456 }
457 case JVM_CONSTANT_Fieldref:
458 // fall through
459 case JVM_CONSTANT_Methodref:
460 // fall through
461 case JVM_CONSTANT_InterfaceMethodref: {
462 if (!_need_verify) break;
463 const int klass_ref_index = cp->uncached_klass_ref_index_at(index);
464 const int name_and_type_ref_index = cp->uncached_name_and_type_ref_index_at(index);
465 check_property(valid_klass_reference_at(klass_ref_index),
466 "Invalid constant pool index %u in class file %s",
467 klass_ref_index, CHECK);
468 check_property(valid_cp_range(name_and_type_ref_index, length) &&
469 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
470 "Invalid constant pool index %u in class file %s",
471 name_and_type_ref_index, CHECK);
472 break;
473 }
474 case JVM_CONSTANT_String: {
475 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
476 break;
477 }
478 case JVM_CONSTANT_Integer:
479 break;
480 case JVM_CONSTANT_Float:
481 break;
482 case JVM_CONSTANT_Long:
483 case JVM_CONSTANT_Double: {
484 index++;
485 check_property(
486 (index < length && cp->tag_at(index).is_invalid()),
487 "Improper constant pool long/double index %u in class file %s",
488 index, CHECK);
489 break;
490 }
491 case JVM_CONSTANT_NameAndType: {
492 if (!_need_verify) break;
493 const int name_ref_index = cp->name_ref_index_at(index);
494 const int signature_ref_index = cp->signature_ref_index_at(index);
495 check_property(valid_symbol_at(name_ref_index),
496 "Invalid constant pool index %u in class file %s",
497 name_ref_index, CHECK);
498 check_property(valid_symbol_at(signature_ref_index),
499 "Invalid constant pool index %u in class file %s",
500 signature_ref_index, CHECK);
501 break;
502 }
503 case JVM_CONSTANT_Utf8:
504 break;
505 case JVM_CONSTANT_UnresolvedClass: // fall-through
506 case JVM_CONSTANT_UnresolvedClassInError: {
507 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
508 break;
509 }
510 case JVM_CONSTANT_ClassIndex: {
511 const int class_index = cp->klass_index_at(index);
512 check_property(valid_symbol_at(class_index),
513 "Invalid constant pool index %u in class file %s",
514 class_index, CHECK);
515 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
516 break;
517 }
518 case JVM_CONSTANT_StringIndex: {
519 const int string_index = cp->string_index_at(index);
520 check_property(valid_symbol_at(string_index),
521 "Invalid constant pool index %u in class file %s",
522 string_index, CHECK);
523 Symbol* const sym = cp->symbol_at(string_index);
524 cp->unresolved_string_at_put(index, sym);
525 break;
526 }
527 case JVM_CONSTANT_MethodHandle: {
528 const int ref_index = cp->method_handle_index_at(index);
529 check_property(valid_cp_range(ref_index, length),
530 "Invalid constant pool index %u in class file %s",
531 ref_index, CHECK);
532 const constantTag tag = cp->tag_at(ref_index);
533 const int ref_kind = cp->method_handle_ref_kind_at(index);
534
535 switch (ref_kind) {
536 case JVM_REF_getField:
537 case JVM_REF_getStatic:
538 case JVM_REF_putField:
539 case JVM_REF_putStatic: {
540 check_property(
541 tag.is_field(),
542 "Invalid constant pool index %u in class file %s (not a field)",
543 ref_index, CHECK);
544 break;
545 }
546 case JVM_REF_invokeVirtual:
547 case JVM_REF_newInvokeSpecial: {
548 check_property(
549 tag.is_method(),
550 "Invalid constant pool index %u in class file %s (not a method)",
551 ref_index, CHECK);
552 break;
553 }
554 case JVM_REF_invokeStatic:
555 case JVM_REF_invokeSpecial: {
556 check_property(
557 tag.is_method() ||
558 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
559 "Invalid constant pool index %u in class file %s (not a method)",
560 ref_index, CHECK);
561 break;
562 }
563 case JVM_REF_invokeInterface: {
564 check_property(
565 tag.is_interface_method(),
566 "Invalid constant pool index %u in class file %s (not an interface method)",
567 ref_index, CHECK);
568 break;
569 }
570 default: {
571 classfile_parse_error(
572 "Bad method handle kind at constant pool index %u in class file %s",
573 index, THREAD);
574 return;
575 }
576 } // switch(refkind)
577 // Keep the ref_index unchanged. It will be indirected at link-time.
578 break;
579 } // case MethodHandle
580 case JVM_CONSTANT_MethodType: {
581 const int ref_index = cp->method_type_index_at(index);
582 check_property(valid_symbol_at(ref_index),
583 "Invalid constant pool index %u in class file %s",
584 ref_index, CHECK);
585 break;
586 }
587 case JVM_CONSTANT_Dynamic: {
588 const int name_and_type_ref_index =
589 cp->bootstrap_name_and_type_ref_index_at(index);
590
591 check_property(valid_cp_range(name_and_type_ref_index, length) &&
592 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
593 "Invalid constant pool index %u in class file %s",
594 name_and_type_ref_index, CHECK);
595 // bootstrap specifier index must be checked later,
596 // when BootstrapMethods attr is available
597
598 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
599 cp->set_has_dynamic_constant();
600 break;
601 }
602 case JVM_CONSTANT_InvokeDynamic: {
603 const int name_and_type_ref_index =
604 cp->bootstrap_name_and_type_ref_index_at(index);
605
606 check_property(valid_cp_range(name_and_type_ref_index, length) &&
607 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
608 "Invalid constant pool index %u in class file %s",
609 name_and_type_ref_index, CHECK);
610 // bootstrap specifier index must be checked later,
611 // when BootstrapMethods attr is available
612 break;
613 }
614 default: {
615 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
616 ShouldNotReachHere();
617 break;
618 }
619 } // switch(tag)
620 } // end of for
621
622 cp->allocate_resolved_klasses(_loader_data, num_klasses, CHECK);
623
624 if (!_need_verify) {
625 return;
626 }
627
628 // second verification pass - checks the strings are of the right format.
629 // but not yet to the other entries
630 for (index = 1; index < length; index++) {
631 const jbyte tag = cp->tag_at(index).value();
632 switch (tag) {
633 case JVM_CONSTANT_UnresolvedClass: {
634 const Symbol* const class_name = cp->klass_name_at(index);
635 // check the name
636 verify_legal_class_name(class_name, CHECK);
637 break;
638 }
639 case JVM_CONSTANT_NameAndType: {
640 if (_need_verify) {
641 const int sig_index = cp->signature_ref_index_at(index);
642 const int name_index = cp->name_ref_index_at(index);
643 const Symbol* const name = cp->symbol_at(name_index);
644 const Symbol* const sig = cp->symbol_at(sig_index);
645 guarantee_property(sig->utf8_length() != 0,
646 "Illegal zero length constant pool entry at %d in class %s",
647 sig_index, CHECK);
648 guarantee_property(name->utf8_length() != 0,
649 "Illegal zero length constant pool entry at %d in class %s",
650 name_index, CHECK);
651
652 if (Signature::is_method(sig)) {
653 // Format check method name and signature
654 verify_legal_method_name(name, CHECK);
655 verify_legal_method_signature(name, sig, CHECK);
656 } else {
657 // Format check field name and signature
658 verify_legal_field_name(name, CHECK);
659 verify_legal_field_signature(name, sig, CHECK);
660 }
661 }
662 break;
663 }
664 case JVM_CONSTANT_Dynamic: {
665 const int name_and_type_ref_index =
666 cp->uncached_name_and_type_ref_index_at(index);
667 // already verified to be utf8
668 const int name_ref_index =
669 cp->name_ref_index_at(name_and_type_ref_index);
670 // already verified to be utf8
671 const int signature_ref_index =
672 cp->signature_ref_index_at(name_and_type_ref_index);
673 const Symbol* const name = cp->symbol_at(name_ref_index);
674 const Symbol* const signature = cp->symbol_at(signature_ref_index);
675 if (_need_verify) {
676 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
677 // Need only to be sure signature is the right type.
678 if (Signature::is_method(signature)) {
679 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
680 }
681 }
682 break;
683 }
684 case JVM_CONSTANT_InvokeDynamic:
685 case JVM_CONSTANT_Fieldref:
686 case JVM_CONSTANT_Methodref:
687 case JVM_CONSTANT_InterfaceMethodref: {
688 const int name_and_type_ref_index =
689 cp->uncached_name_and_type_ref_index_at(index);
690 // already verified to be utf8
691 const int name_ref_index =
692 cp->name_ref_index_at(name_and_type_ref_index);
693 // already verified to be utf8
694 const int signature_ref_index =
695 cp->signature_ref_index_at(name_and_type_ref_index);
696 const Symbol* const name = cp->symbol_at(name_ref_index);
697 const Symbol* const signature = cp->symbol_at(signature_ref_index);
698 if (tag == JVM_CONSTANT_Fieldref) {
699 if (_need_verify) {
700 // Field name and signature are verified above, when iterating NameAndType_info.
701 // Need only to be sure signature is non-zero length and the right type.
702 if (Signature::is_method(signature)) {
703 throwIllegalSignature("Field", name, signature, CHECK);
704 }
705 }
706 } else {
707 if (_need_verify) {
708 // Method name and signature are individually verified above, when iterating
709 // NameAndType_info. Need to check here that signature is non-zero length and
710 // the right type.
711 if (!Signature::is_method(signature)) {
712 throwIllegalSignature("Method", name, signature, CHECK);
713 }
714 }
715 // If a class method name begins with '<', it must be "<init>" and have void signature.
716 const unsigned int name_len = name->utf8_length();
717 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
718 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
719 if (name != vmSymbols::object_initializer_name()) {
720 classfile_parse_error(
721 "Bad method name at constant pool index %u in class file %s",
722 name_ref_index, THREAD);
723 return;
724 } else if (!Signature::is_void_method(signature)) { // must have void signature.
725 throwIllegalSignature("Method", name, signature, CHECK);
726 }
727 }
728 }
729 break;
730 }
731 case JVM_CONSTANT_MethodHandle: {
732 const int ref_index = cp->method_handle_index_at(index);
733 const int ref_kind = cp->method_handle_ref_kind_at(index);
734 switch (ref_kind) {
735 case JVM_REF_invokeVirtual:
736 case JVM_REF_invokeStatic:
737 case JVM_REF_invokeSpecial:
738 case JVM_REF_newInvokeSpecial: {
739 const int name_and_type_ref_index =
740 cp->uncached_name_and_type_ref_index_at(ref_index);
741 const int name_ref_index =
742 cp->name_ref_index_at(name_and_type_ref_index);
743 const Symbol* const name = cp->symbol_at(name_ref_index);
744 if (ref_kind == JVM_REF_newInvokeSpecial) {
745 if (name != vmSymbols::object_initializer_name()) {
746 classfile_parse_error(
747 "Bad constructor name at constant pool index %u in class file %s",
748 name_ref_index, THREAD);
749 return;
750 }
751 } else {
752 if (name == vmSymbols::object_initializer_name()) {
753 classfile_parse_error(
754 "Bad method name at constant pool index %u in class file %s",
755 name_ref_index, THREAD);
756 return;
757 }
758 }
759 break;
760 }
761 // Other ref_kinds are already fully checked in previous pass.
762 } // switch(ref_kind)
763 break;
764 }
765 case JVM_CONSTANT_MethodType: {
766 const Symbol* const no_name = vmSymbols::type_name(); // place holder
767 const Symbol* const signature = cp->method_type_signature_at(index);
768 verify_legal_method_signature(no_name, signature, CHECK);
769 break;
770 }
771 case JVM_CONSTANT_Utf8: {
772 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
773 }
774 } // switch(tag)
775 } // end of for
776 }
777
778 class NameSigHash: public ResourceObj {
779 public:
780 const Symbol* _name; // name
781 const Symbol* _sig; // signature
782
783 static const int HASH_ROW_SIZE = 256;
784
785 NameSigHash(Symbol* name, Symbol* sig) :
786 _name(name),
787 _sig(sig) {}
788
789 static unsigned int hash(NameSigHash const& namesig) {
790 return namesig._name->identity_hash() ^ namesig._sig->identity_hash();
791 }
792
793 static bool equals(NameSigHash const& e0, NameSigHash const& e1) {
794 return (e0._name == e1._name) &&
795 (e0._sig == e1._sig);
796 }
797 };
798
799 using NameSigHashtable = ResourceHashtable<NameSigHash, int,
800 NameSigHash::HASH_ROW_SIZE,
801 AnyObj::RESOURCE_AREA, mtInternal,
802 &NameSigHash::hash, &NameSigHash::equals>;
803
804 // Side-effects: populates the _local_interfaces field
805 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
806 const int itfs_len,
807 ConstantPool* const cp,
808 bool* const has_nonstatic_concrete_methods,
809 TRAPS) {
810 assert(stream != nullptr, "invariant");
811 assert(cp != nullptr, "invariant");
812 assert(has_nonstatic_concrete_methods != nullptr, "invariant");
813
814 if (itfs_len == 0) {
815 _local_interfaces = Universe::the_empty_instance_klass_array();
816 } else {
817 assert(itfs_len > 0, "only called for len>0");
818 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, nullptr, CHECK);
819
820 int index;
821 for (index = 0; index < itfs_len; index++) {
822 const u2 interface_index = stream->get_u2(CHECK);
823 Klass* interf;
824 check_property(
825 valid_klass_reference_at(interface_index),
826 "Interface name has bad constant pool index %u in class file %s",
827 interface_index, CHECK);
828 if (cp->tag_at(interface_index).is_klass()) {
829 interf = cp->resolved_klass_at(interface_index);
830 } else {
831 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
832
833 // Don't need to check legal name because it's checked when parsing constant pool.
834 // But need to make sure it's not an array type.
835 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
836 "Bad interface name in class file %s", CHECK);
837
838 // Call resolve on the interface class name with class circularity checking
839 interf = SystemDictionary::resolve_super_or_fail(_class_name,
840 unresolved_klass,
841 Handle(THREAD, _loader_data->class_loader()),
842 _protection_domain,
843 false, CHECK);
844 }
845
846 if (!interf->is_interface()) {
847 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
848 err_msg("class %s can not implement %s, because it is not an interface (%s)",
849 _class_name->as_klass_external_name(),
850 interf->external_name(),
851 interf->class_in_module_of_loader()));
852 }
853
854 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
855 *has_nonstatic_concrete_methods = true;
856 }
857 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
858 }
859
860 if (!_need_verify || itfs_len <= 1) {
861 return;
862 }
863
864 // Check if there's any duplicates in interfaces
865 ResourceMark rm(THREAD);
866 // Set containing interface names
867 ResourceHashtable<Symbol*, int>* interface_names = new ResourceHashtable<Symbol*, int>();
868 for (index = 0; index < itfs_len; index++) {
869 const InstanceKlass* const k = _local_interfaces->at(index);
870 Symbol* interface_name = k->name();
871 // If no duplicates, add (name, nullptr) in hashtable interface_names.
872 if (!interface_names->put(interface_name, 0)) {
873 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
874 interface_name->as_C_string(), THREAD);
875 return;
876 }
877 }
878 }
879 }
880
881 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
882 int constantvalue_index,
883 int signature_index,
884 TRAPS) const {
885 // Make sure the constant pool entry is of a type appropriate to this field
886 guarantee_property(
887 (constantvalue_index > 0 &&
888 constantvalue_index < cp->length()),
889 "Bad initial value index %u in ConstantValue attribute in class file %s",
890 constantvalue_index, CHECK);
891
892 const constantTag value_type = cp->tag_at(constantvalue_index);
893 switch(cp->basic_type_for_signature_at(signature_index)) {
894 case T_LONG: {
895 guarantee_property(value_type.is_long(),
896 "Inconsistent constant value type in class file %s",
897 CHECK);
898 break;
899 }
900 case T_FLOAT: {
901 guarantee_property(value_type.is_float(),
902 "Inconsistent constant value type in class file %s",
903 CHECK);
904 break;
905 }
906 case T_DOUBLE: {
907 guarantee_property(value_type.is_double(),
908 "Inconsistent constant value type in class file %s",
909 CHECK);
910 break;
911 }
912 case T_BYTE:
913 case T_CHAR:
914 case T_SHORT:
915 case T_BOOLEAN:
916 case T_INT: {
917 guarantee_property(value_type.is_int(),
918 "Inconsistent constant value type in class file %s",
919 CHECK);
920 break;
921 }
922 case T_OBJECT: {
923 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
924 && value_type.is_string()),
925 "Bad string initial value in class file %s",
926 CHECK);
927 break;
928 }
929 default: {
930 classfile_parse_error("Unable to set initial value %u in class file %s",
931 constantvalue_index,
932 THREAD);
933 }
934 }
935 }
936
937 class AnnotationCollector : public ResourceObj{
938 public:
939 enum Location { _in_field, _in_method, _in_class };
940 enum ID {
941 _unknown = 0,
942 _method_CallerSensitive,
943 _method_ForceInline,
944 _method_DontInline,
945 _method_ChangesCurrentThread,
946 _method_JvmtiMountTransition,
947 _method_InjectedProfile,
948 _method_LambdaForm_Compiled,
949 _method_Hidden,
950 _method_Scoped,
951 _method_IntrinsicCandidate,
952 _jdk_internal_vm_annotation_Contended,
953 _field_Stable,
954 _jdk_internal_vm_annotation_ReservedStackAccess,
955 _jdk_internal_ValueBased,
956 _java_lang_Deprecated,
957 _java_lang_Deprecated_for_removal,
958 _annotation_LIMIT
959 };
960 const Location _location;
961 int _annotations_present;
962 u2 _contended_group;
963
964 AnnotationCollector(Location location)
965 : _location(location), _annotations_present(0), _contended_group(0)
966 {
967 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
968 }
969 // If this annotation name has an ID, report it (or _none).
970 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
971 // Set the annotation name:
972 void set_annotation(ID id) {
973 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
974 _annotations_present |= (int)nth_bit((int)id);
975 }
976
977 void remove_annotation(ID id) {
978 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
979 _annotations_present &= (int)~nth_bit((int)id);
980 }
981
982 // Report if the annotation is present.
983 bool has_any_annotations() const { return _annotations_present != 0; }
984 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
985
986 void set_contended_group(u2 group) { _contended_group = group; }
987 u2 contended_group() const { return _contended_group; }
988
989 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
990
991 void set_stable(bool stable) { set_annotation(_field_Stable); }
992 bool is_stable() const { return has_annotation(_field_Stable); }
993 };
994
995 // This class also doubles as a holder for metadata cleanup.
996 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
997 private:
998 ClassLoaderData* _loader_data;
999 AnnotationArray* _field_annotations;
1000 AnnotationArray* _field_type_annotations;
1001 public:
1002 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1003 AnnotationCollector(_in_field),
1004 _loader_data(loader_data),
1005 _field_annotations(nullptr),
1006 _field_type_annotations(nullptr) {}
1007 ~FieldAnnotationCollector();
1008 void apply_to(FieldInfo* f);
1009 AnnotationArray* field_annotations() { return _field_annotations; }
1010 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1011
1012 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1013 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1014 };
1015
1016 class MethodAnnotationCollector : public AnnotationCollector{
1017 public:
1018 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1019 void apply_to(const methodHandle& m);
1020 };
1021
1022 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1023 public:
1024 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1025 void apply_to(InstanceKlass* ik);
1026 };
1027
1028
1029 static int skip_annotation_value(const u1*, int, int); // fwd decl
1030
1031 // Safely increment index by val if does not pass limit
1032 #define SAFE_ADD(index, limit, val) \
1033 if (index >= limit - val) return limit; \
1034 index += val;
1035
1036 // Skip an annotation. Return >=limit if there is any problem.
1037 static int skip_annotation(const u1* buffer, int limit, int index) {
1038 assert(buffer != nullptr, "invariant");
1039 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1040 // value := switch (tag:u1) { ... }
1041 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1042 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1043 while (--nmem >= 0 && index < limit) {
1044 SAFE_ADD(index, limit, 2); // skip member
1045 index = skip_annotation_value(buffer, limit, index);
1046 }
1047 return index;
1048 }
1049
1050 // Skip an annotation value. Return >=limit if there is any problem.
1051 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1052 assert(buffer != nullptr, "invariant");
1053
1054 // value := switch (tag:u1) {
1055 // case B, C, I, S, Z, D, F, J, c: con:u2;
1056 // case e: e_class:u2 e_name:u2;
1057 // case s: s_con:u2;
1058 // case [: do(nval:u2) {value};
1059 // case @: annotation;
1060 // case s: s_con:u2;
1061 // }
1062 SAFE_ADD(index, limit, 1); // read tag
1063 const u1 tag = buffer[index - 1];
1064 switch (tag) {
1065 case 'B':
1066 case 'C':
1067 case 'I':
1068 case 'S':
1069 case 'Z':
1070 case 'D':
1071 case 'F':
1072 case 'J':
1073 case 'c':
1074 case 's':
1075 SAFE_ADD(index, limit, 2); // skip con or s_con
1076 break;
1077 case 'e':
1078 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1079 break;
1080 case '[':
1081 {
1082 SAFE_ADD(index, limit, 2); // read nval
1083 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1084 while (--nval >= 0 && index < limit) {
1085 index = skip_annotation_value(buffer, limit, index);
1086 }
1087 }
1088 break;
1089 case '@':
1090 index = skip_annotation(buffer, limit, index);
1091 break;
1092 default:
1093 return limit; // bad tag byte
1094 }
1095 return index;
1096 }
1097
1098 // Sift through annotations, looking for those significant to the VM:
1099 static void parse_annotations(const ConstantPool* const cp,
1100 const u1* buffer, int limit,
1101 AnnotationCollector* coll,
1102 ClassLoaderData* loader_data,
1103 const bool can_access_vm_annotations) {
1104
1105 assert(cp != nullptr, "invariant");
1106 assert(buffer != nullptr, "invariant");
1107 assert(coll != nullptr, "invariant");
1108 assert(loader_data != nullptr, "invariant");
1109
1110 // annotations := do(nann:u2) {annotation}
1111 int index = 2; // read nann
1112 if (index >= limit) return;
1113 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1114 enum { // initial annotation layout
1115 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1116 count_off = 2, // u2 such as 1 (one value)
1117 member_off = 4, // utf8 such as 'value'
1118 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1119 e_tag_val = 'e',
1120 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1121 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1122 e_size = 11, // end of 'e' annotation
1123 c_tag_val = 'c', // payload is type
1124 c_con_off = 7, // utf8 payload, such as 'I'
1125 c_size = 9, // end of 'c' annotation
1126 s_tag_val = 's', // payload is String
1127 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1128 s_size = 9,
1129 b_tag_val = 'Z', // payload is boolean
1130 min_size = 6 // smallest possible size (zero members)
1131 };
1132 // Cannot add min_size to index in case of overflow MAX_INT
1133 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1134 int index0 = index;
1135 index = skip_annotation(buffer, limit, index);
1136 const u1* const abase = buffer + index0;
1137 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1138 const int count = Bytes::get_Java_u2((address)abase + count_off);
1139 const Symbol* const aname = check_symbol_at(cp, atype);
1140 if (aname == nullptr) break; // invalid annotation name
1141 const Symbol* member = nullptr;
1142 if (count >= 1) {
1143 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1144 member = check_symbol_at(cp, member_index);
1145 if (member == nullptr) break; // invalid member name
1146 }
1147
1148 // Here is where parsing particular annotations will take place.
1149 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1150 if (AnnotationCollector::_unknown == id) continue;
1151 coll->set_annotation(id);
1152 if (AnnotationCollector::_java_lang_Deprecated == id) {
1153 // @Deprecated can specify forRemoval=true, which we need
1154 // to record for JFR to use. If the annotation is not well-formed
1155 // then we may not be able to determine that.
1156 const u1* offset = abase + member_off;
1157 // There are only 2 members in @Deprecated.
1158 int n_members = MIN2(count, 2);
1159 for (int i = 0; i < n_members; ++i) {
1160 int member_index = Bytes::get_Java_u2((address)offset);
1161 offset += 2;
1162 member = check_symbol_at(cp, member_index);
1163 if (member == vmSymbols::since() &&
1164 (*((address)offset) == s_tag_val)) {
1165 // Found `since` first so skip over it
1166 offset += 3;
1167 }
1168 else if (member == vmSymbols::for_removal() &&
1169 (*((address)offset) == b_tag_val)) {
1170 const u2 boolean_value_index = Bytes::get_Java_u2((address)offset + 1);
1171 // No guarantee the entry is valid so check it refers to an int in the CP.
1172 if (cp->is_within_bounds(boolean_value_index) &&
1173 cp->tag_at(boolean_value_index).is_int() &&
1174 cp->int_at(boolean_value_index) == 1) {
1175 // forRemoval == true
1176 coll->set_annotation(AnnotationCollector::_java_lang_Deprecated_for_removal);
1177 }
1178 break; // no need to check further
1179 }
1180 else {
1181 // This @Deprecated annotation is malformed so we don't try to
1182 // determine whether forRemoval is set.
1183 break;
1184 }
1185 }
1186 continue; // proceed to next annotation
1187 }
1188
1189 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1190 // @Contended can optionally specify the contention group.
1191 //
1192 // Contended group defines the equivalence class over the fields:
1193 // the fields within the same contended group are not treated distinct.
1194 // The only exception is default group, which does not incur the
1195 // equivalence. Naturally, contention group for classes is meaningless.
1196 //
1197 // While the contention group is specified as String, annotation
1198 // values are already interned, and we might as well use the constant
1199 // pool index as the group tag.
1200 //
1201 u2 group_index = 0; // default contended group
1202 if (count == 1
1203 && s_size == (index - index0) // match size
1204 && s_tag_val == *(abase + tag_off)
1205 && member == vmSymbols::value_name()) {
1206 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1207 // No guarantee the group_index is valid so check it refers to a
1208 // symbol in the CP.
1209 if (cp->is_within_bounds(group_index) &&
1210 cp->tag_at(group_index).is_utf8()) {
1211 // Seems valid, so check for empty string and reset
1212 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1213 group_index = 0; // default contended group
1214 }
1215 } else {
1216 // Not valid so use the default
1217 group_index = 0;
1218 }
1219 }
1220 coll->set_contended_group(group_index);
1221 continue; // proceed to next annotation
1222 }
1223 }
1224 }
1225
1226
1227 // Parse attributes for a field.
1228 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1229 u2 attributes_count,
1230 bool is_static, u2 signature_index,
1231 u2* const constantvalue_index_addr,
1232 bool* const is_synthetic_addr,
1233 u2* const generic_signature_index_addr,
1234 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1235 TRAPS) {
1236 assert(cfs != nullptr, "invariant");
1237 assert(constantvalue_index_addr != nullptr, "invariant");
1238 assert(is_synthetic_addr != nullptr, "invariant");
1239 assert(generic_signature_index_addr != nullptr, "invariant");
1240 assert(parsed_annotations != nullptr, "invariant");
1241 assert(attributes_count > 0, "attributes_count should be greater than 0");
1242
1243 u2 constantvalue_index = 0;
1244 u2 generic_signature_index = 0;
1245 bool is_synthetic = false;
1246 const u1* runtime_visible_annotations = nullptr;
1247 int runtime_visible_annotations_length = 0;
1248 const u1* runtime_visible_type_annotations = nullptr;
1249 int runtime_visible_type_annotations_length = 0;
1250 bool runtime_invisible_annotations_exists = false;
1251 bool runtime_invisible_type_annotations_exists = false;
1252 const ConstantPool* const cp = _cp;
1253
1254 while (attributes_count--) {
1255 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1256 const u2 attribute_name_index = cfs->get_u2_fast();
1257 const u4 attribute_length = cfs->get_u4_fast();
1258 check_property(valid_symbol_at(attribute_name_index),
1259 "Invalid field attribute index %u in class file %s",
1260 attribute_name_index,
1261 CHECK);
1262
1263 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1264 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1265 // ignore if non-static
1266 if (constantvalue_index != 0) {
1267 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1268 return;
1269 }
1270 check_property(
1271 attribute_length == 2,
1272 "Invalid ConstantValue field attribute length %u in class file %s",
1273 attribute_length, CHECK);
1274
1275 constantvalue_index = cfs->get_u2(CHECK);
1276 if (_need_verify) {
1277 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1278 }
1279 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1280 if (attribute_length != 0) {
1281 classfile_parse_error(
1282 "Invalid Synthetic field attribute length %u in class file %s",
1283 attribute_length, THREAD);
1284 return;
1285 }
1286 is_synthetic = true;
1287 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1288 if (attribute_length != 0) {
1289 classfile_parse_error(
1290 "Invalid Deprecated field attribute length %u in class file %s",
1291 attribute_length, THREAD);
1292 return;
1293 }
1294 } else if (_major_version >= JAVA_1_5_VERSION) {
1295 if (attribute_name == vmSymbols::tag_signature()) {
1296 if (generic_signature_index != 0) {
1297 classfile_parse_error(
1298 "Multiple Signature attributes for field in class file %s", THREAD);
1299 return;
1300 }
1301 if (attribute_length != 2) {
1302 classfile_parse_error(
1303 "Wrong size %u for field's Signature attribute in class file %s",
1304 attribute_length, THREAD);
1305 return;
1306 }
1307 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1308 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1309 if (runtime_visible_annotations != nullptr) {
1310 classfile_parse_error(
1311 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1312 return;
1313 }
1314 runtime_visible_annotations_length = attribute_length;
1315 runtime_visible_annotations = cfs->current();
1316 assert(runtime_visible_annotations != nullptr, "null visible annotations");
1317 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1318 parse_annotations(cp,
1319 runtime_visible_annotations,
1320 runtime_visible_annotations_length,
1321 parsed_annotations,
1322 _loader_data,
1323 _can_access_vm_annotations);
1324 cfs->skip_u1_fast(runtime_visible_annotations_length);
1325 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1326 if (runtime_invisible_annotations_exists) {
1327 classfile_parse_error(
1328 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1329 return;
1330 }
1331 runtime_invisible_annotations_exists = true;
1332 cfs->skip_u1(attribute_length, CHECK);
1333 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1334 if (runtime_visible_type_annotations != nullptr) {
1335 classfile_parse_error(
1336 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1337 return;
1338 }
1339 runtime_visible_type_annotations_length = attribute_length;
1340 runtime_visible_type_annotations = cfs->current();
1341 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
1342 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1343 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1344 if (runtime_invisible_type_annotations_exists) {
1345 classfile_parse_error(
1346 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1347 return;
1348 } else {
1349 runtime_invisible_type_annotations_exists = true;
1350 }
1351 cfs->skip_u1(attribute_length, CHECK);
1352 } else {
1353 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1354 }
1355 } else {
1356 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1357 }
1358 }
1359
1360 *constantvalue_index_addr = constantvalue_index;
1361 *is_synthetic_addr = is_synthetic;
1362 *generic_signature_index_addr = generic_signature_index;
1363 AnnotationArray* a = allocate_annotations(runtime_visible_annotations,
1364 runtime_visible_annotations_length,
1365 CHECK);
1366 parsed_annotations->set_field_annotations(a);
1367 a = allocate_annotations(runtime_visible_type_annotations,
1368 runtime_visible_type_annotations_length,
1369 CHECK);
1370 parsed_annotations->set_field_type_annotations(a);
1371 return;
1372 }
1373
1374
1375 // Side-effects: populates the _fields, _fields_annotations,
1376 // _fields_type_annotations fields
1377 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1378 bool is_interface,
1379 ConstantPool* cp,
1380 const int cp_size,
1381 u2* const java_fields_count_ptr,
1382 TRAPS) {
1383
1384 assert(cfs != nullptr, "invariant");
1385 assert(cp != nullptr, "invariant");
1386 assert(java_fields_count_ptr != nullptr, "invariant");
1387
1388 assert(nullptr == _fields_annotations, "invariant");
1389 assert(nullptr == _fields_type_annotations, "invariant");
1390
1391 cfs->guarantee_more(2, CHECK); // length
1392 const u2 length = cfs->get_u2_fast();
1393 *java_fields_count_ptr = length;
1394
1395 int num_injected = 0;
1396 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1397 &num_injected);
1398 const int total_fields = length + num_injected;
1399
1400 // Allocate a temporary resource array to collect field data.
1401 // After parsing all fields, data are stored in a UNSIGNED5 compressed stream.
1402 _temp_field_info = new GrowableArray<FieldInfo>(total_fields);
1403
1404 ResourceMark rm(THREAD);
1405 for (int n = 0; n < length; n++) {
1406 // access_flags, name_index, descriptor_index, attributes_count
1407 cfs->guarantee_more(8, CHECK);
1408
1409 AccessFlags access_flags;
1410 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1411 verify_legal_field_modifiers(flags, is_interface, CHECK);
1412 access_flags.set_flags(flags);
1413 FieldInfo::FieldFlags fieldFlags(0);
1414
1415 const u2 name_index = cfs->get_u2_fast();
1416 check_property(valid_symbol_at(name_index),
1417 "Invalid constant pool index %u for field name in class file %s",
1418 name_index, CHECK);
1419 const Symbol* const name = cp->symbol_at(name_index);
1420 verify_legal_field_name(name, CHECK);
1421
1422 const u2 signature_index = cfs->get_u2_fast();
1423 check_property(valid_symbol_at(signature_index),
1424 "Invalid constant pool index %u for field signature in class file %s",
1425 signature_index, CHECK);
1426 const Symbol* const sig = cp->symbol_at(signature_index);
1427 verify_legal_field_signature(name, sig, CHECK);
1428
1429 u2 constantvalue_index = 0;
1430 bool is_synthetic = false;
1431 u2 generic_signature_index = 0;
1432 const bool is_static = access_flags.is_static();
1433 FieldAnnotationCollector parsed_annotations(_loader_data);
1434
1435 const u2 attributes_count = cfs->get_u2_fast();
1436 if (attributes_count > 0) {
1437 parse_field_attributes(cfs,
1438 attributes_count,
1439 is_static,
1440 signature_index,
1441 &constantvalue_index,
1442 &is_synthetic,
1443 &generic_signature_index,
1444 &parsed_annotations,
1445 CHECK);
1446
1447 if (parsed_annotations.field_annotations() != nullptr) {
1448 if (_fields_annotations == nullptr) {
1449 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1450 _loader_data, length, nullptr,
1451 CHECK);
1452 }
1453 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1454 parsed_annotations.set_field_annotations(nullptr);
1455 }
1456 if (parsed_annotations.field_type_annotations() != nullptr) {
1457 if (_fields_type_annotations == nullptr) {
1458 _fields_type_annotations =
1459 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1460 length,
1461 nullptr,
1462 CHECK);
1463 }
1464 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1465 parsed_annotations.set_field_type_annotations(nullptr);
1466 }
1467
1468 if (is_synthetic) {
1469 access_flags.set_is_synthetic();
1470 }
1471 if (generic_signature_index != 0) {
1472 fieldFlags.update_generic(true);
1473 }
1474 }
1475
1476 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1477
1478 // Update number of static oop fields.
1479 if (is_static && is_reference_type(type)) {
1480 _static_oop_count++;
1481 }
1482
1483 FieldInfo fi(access_flags, name_index, signature_index, constantvalue_index, fieldFlags);
1484 fi.set_index(n);
1485 if (fieldFlags.is_generic()) {
1486 fi.set_generic_signature_index(generic_signature_index);
1487 }
1488 parsed_annotations.apply_to(&fi);
1489 if (fi.field_flags().is_contended()) {
1490 _has_contended_fields = true;
1491 }
1492 _temp_field_info->append(fi);
1493 }
1494 assert(_temp_field_info->length() == length, "Must be");
1495
1496 int index = length;
1497 if (num_injected != 0) {
1498 for (int n = 0; n < num_injected; n++) {
1499 // Check for duplicates
1500 if (injected[n].may_be_java) {
1501 const Symbol* const name = injected[n].name();
1502 const Symbol* const signature = injected[n].signature();
1503 bool duplicate = false;
1504 for (int i = 0; i < length; i++) {
1505 const FieldInfo* const f = _temp_field_info->adr_at(i);
1506 if (name == cp->symbol_at(f->name_index()) &&
1507 signature == cp->symbol_at(f->signature_index())) {
1508 // Symbol is desclared in Java so skip this one
1509 duplicate = true;
1510 break;
1511 }
1512 }
1513 if (duplicate) {
1514 // These will be removed from the field array at the end
1515 continue;
1516 }
1517 }
1518
1519 // Injected field
1520 FieldInfo::FieldFlags fflags(0);
1521 fflags.update_injected(true);
1522 AccessFlags aflags;
1523 FieldInfo fi(aflags, (u2)(injected[n].name_index), (u2)(injected[n].signature_index), 0, fflags);
1524 fi.set_index(index);
1525 _temp_field_info->append(fi);
1526 index++;
1527 }
1528 }
1529
1530 assert(_temp_field_info->length() == index, "Must be");
1531
1532 if (_need_verify && length > 1) {
1533 // Check duplicated fields
1534 ResourceMark rm(THREAD);
1535 // Set containing name-signature pairs
1536 NameSigHashtable* names_and_sigs = new NameSigHashtable();
1537 for (int i = 0; i < _temp_field_info->length(); i++) {
1538 NameSigHash name_and_sig(_temp_field_info->adr_at(i)->name(_cp),
1539 _temp_field_info->adr_at(i)->signature(_cp));
1540 // If no duplicates, add name/signature in hashtable names_and_sigs.
1541 if(!names_and_sigs->put(name_and_sig, 0)) {
1542 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1543 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
1544 return;
1545 }
1546 }
1547 }
1548 }
1549
1550
1551 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1552 u4 code_length,
1553 u4 exception_table_length,
1554 TRAPS) {
1555 assert(cfs != nullptr, "invariant");
1556
1557 const unsafe_u2* const exception_table_start = cfs->current();
1558 assert(exception_table_start != nullptr, "null exception table");
1559
1560 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1561 // end_pc,
1562 // handler_pc,
1563 // catch_type_index
1564
1565 // Will check legal target after parsing code array in verifier.
1566 if (_need_verify) {
1567 for (unsigned int i = 0; i < exception_table_length; i++) {
1568 const u2 start_pc = cfs->get_u2_fast();
1569 const u2 end_pc = cfs->get_u2_fast();
1570 const u2 handler_pc = cfs->get_u2_fast();
1571 const u2 catch_type_index = cfs->get_u2_fast();
1572 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1573 "Illegal exception table range in class file %s",
1574 CHECK_NULL);
1575 guarantee_property(handler_pc < code_length,
1576 "Illegal exception table handler in class file %s",
1577 CHECK_NULL);
1578 if (catch_type_index != 0) {
1579 guarantee_property(valid_klass_reference_at(catch_type_index),
1580 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1581 }
1582 }
1583 } else {
1584 cfs->skip_u2_fast(exception_table_length * 4);
1585 }
1586 return exception_table_start;
1587 }
1588
1589 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1590 u4 code_length,
1591 CompressedLineNumberWriteStream**const write_stream,
1592 TRAPS) {
1593
1594 const ClassFileStream* const cfs = _stream;
1595 unsigned int num_entries = cfs->get_u2(CHECK);
1596
1597 // Each entry is a u2 start_pc, and a u2 line_number
1598 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1599
1600 // Verify line number attribute and table length
1601 check_property(
1602 code_attribute_length == sizeof(u2) + length_in_bytes,
1603 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1604
1605 cfs->guarantee_more(length_in_bytes, CHECK);
1606
1607 if ((*write_stream) == nullptr) {
1608 if (length_in_bytes > fixed_buffer_size) {
1609 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1610 } else {
1611 (*write_stream) = new CompressedLineNumberWriteStream(
1612 _linenumbertable_buffer, fixed_buffer_size);
1613 }
1614 }
1615
1616 while (num_entries-- > 0) {
1617 const u2 bci = cfs->get_u2_fast(); // start_pc
1618 const u2 line = cfs->get_u2_fast(); // line_number
1619 guarantee_property(bci < code_length,
1620 "Invalid pc in LineNumberTable in class file %s", CHECK);
1621 (*write_stream)->write_pair(bci, line);
1622 }
1623 }
1624
1625
1626 class LVT_Hash : public AllStatic {
1627 public:
1628
1629 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1630 /*
1631 * 3-tuple start_bci/length/slot has to be unique key,
1632 * so the following comparison seems to be redundant:
1633 * && elem->name_cp_index == entry->_elem->name_cp_index
1634 */
1635 return (e0.start_bci == e1.start_bci &&
1636 e0.length == e1.length &&
1637 e0.name_cp_index == e1.name_cp_index &&
1638 e0.slot == e1.slot);
1639 }
1640
1641 static unsigned int hash(LocalVariableTableElement const& e0) {
1642 unsigned int raw_hash = e0.start_bci;
1643
1644 raw_hash = e0.length + raw_hash * 37;
1645 raw_hash = e0.name_cp_index + raw_hash * 37;
1646 raw_hash = e0.slot + raw_hash * 37;
1647
1648 return raw_hash;
1649 }
1650 };
1651
1652
1653 // Class file LocalVariableTable elements.
1654 class Classfile_LVT_Element {
1655 public:
1656 u2 start_bci;
1657 u2 length;
1658 u2 name_cp_index;
1659 u2 descriptor_cp_index;
1660 u2 slot;
1661 };
1662
1663 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1664 LocalVariableTableElement* const lvt) {
1665 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1666 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1667 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1668 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1669 lvt->signature_cp_index = 0;
1670 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1671 }
1672
1673 // Function is used to parse both attributes:
1674 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1675 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1676 u4 code_length,
1677 u2 max_locals,
1678 u4 code_attribute_length,
1679 u2* const localvariable_table_length,
1680 bool isLVTT,
1681 TRAPS) {
1682 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1683 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1684 const unsigned int size = checked_cast<unsigned>(
1685 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2));
1686
1687 const ConstantPool* const cp = _cp;
1688
1689 // Verify local variable table attribute has right length
1690 if (_need_verify) {
1691 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1692 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1693 }
1694
1695 const unsafe_u2* const localvariable_table_start = cfs->current();
1696 assert(localvariable_table_start != nullptr, "null local variable table");
1697 if (!_need_verify) {
1698 cfs->skip_u2_fast(size);
1699 } else {
1700 cfs->guarantee_more(size * 2, CHECK_NULL);
1701 for(int i = 0; i < (*localvariable_table_length); i++) {
1702 const u2 start_pc = cfs->get_u2_fast();
1703 const u2 length = cfs->get_u2_fast();
1704 const u2 name_index = cfs->get_u2_fast();
1705 const u2 descriptor_index = cfs->get_u2_fast();
1706 const u2 index = cfs->get_u2_fast();
1707 // Assign to a u4 to avoid overflow
1708 const u4 end_pc = (u4)start_pc + (u4)length;
1709
1710 if (start_pc >= code_length) {
1711 classfile_parse_error(
1712 "Invalid start_pc %u in %s in class file %s",
1713 start_pc, tbl_name, THREAD);
1714 return nullptr;
1715 }
1716 if (end_pc > code_length) {
1717 classfile_parse_error(
1718 "Invalid length %u in %s in class file %s",
1719 length, tbl_name, THREAD);
1720 return nullptr;
1721 }
1722 const int cp_size = cp->length();
1723 guarantee_property(valid_symbol_at(name_index),
1724 "Name index %u in %s has bad constant type in class file %s",
1725 name_index, tbl_name, CHECK_NULL);
1726 guarantee_property(valid_symbol_at(descriptor_index),
1727 "Signature index %u in %s has bad constant type in class file %s",
1728 descriptor_index, tbl_name, CHECK_NULL);
1729
1730 const Symbol* const name = cp->symbol_at(name_index);
1731 const Symbol* const sig = cp->symbol_at(descriptor_index);
1732 verify_legal_field_name(name, CHECK_NULL);
1733 u2 extra_slot = 0;
1734 if (!isLVTT) {
1735 verify_legal_field_signature(name, sig, CHECK_NULL);
1736
1737 // 4894874: check special cases for double and long local variables
1738 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1739 sig == vmSymbols::type_signature(T_LONG)) {
1740 extra_slot = 1;
1741 }
1742 }
1743 guarantee_property((index + extra_slot) < max_locals,
1744 "Invalid index %u in %s in class file %s",
1745 index, tbl_name, CHECK_NULL);
1746 }
1747 }
1748 return localvariable_table_start;
1749 }
1750
1751 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1752 u4 code_attribute_length,
1753 TRAPS) {
1754 assert(cfs != nullptr, "invariant");
1755
1756 if (0 == code_attribute_length) {
1757 return nullptr;
1758 }
1759
1760 const u1* const stackmap_table_start = cfs->current();
1761 assert(stackmap_table_start != nullptr, "null stackmap table");
1762
1763 // check code_attribute_length
1764 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1765
1766 return stackmap_table_start;
1767 }
1768
1769 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1770 u2* const checked_exceptions_length,
1771 u4 method_attribute_length,
1772 TRAPS) {
1773 assert(cfs != nullptr, "invariant");
1774 assert(checked_exceptions_length != nullptr, "invariant");
1775
1776 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1777 *checked_exceptions_length = cfs->get_u2_fast();
1778 const unsigned int size =
1779 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1780 const unsafe_u2* const checked_exceptions_start = cfs->current();
1781 assert(checked_exceptions_start != nullptr, "null checked exceptions");
1782 if (!_need_verify) {
1783 cfs->skip_u2_fast(size);
1784 } else {
1785 // Verify each value in the checked exception table
1786 u2 checked_exception;
1787 const u2 len = *checked_exceptions_length;
1788 cfs->guarantee_more(2 * len, CHECK_NULL);
1789 for (int i = 0; i < len; i++) {
1790 checked_exception = cfs->get_u2_fast();
1791 check_property(
1792 valid_klass_reference_at(checked_exception),
1793 "Exception name has bad type at constant pool %u in class file %s",
1794 checked_exception, CHECK_NULL);
1795 }
1796 }
1797 // check exceptions attribute length
1798 if (_need_verify) {
1799 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1800 sizeof(u2) * size),
1801 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1802 }
1803 return checked_exceptions_start;
1804 }
1805
1806 void ClassFileParser::throwIllegalSignature(const char* type,
1807 const Symbol* name,
1808 const Symbol* sig,
1809 TRAPS) const {
1810 assert(name != nullptr, "invariant");
1811 assert(sig != nullptr, "invariant");
1812
1813 ResourceMark rm(THREAD);
1814 Exceptions::fthrow(THREAD_AND_LOCATION,
1815 vmSymbols::java_lang_ClassFormatError(),
1816 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1817 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1818 }
1819
1820 AnnotationCollector::ID
1821 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1822 const Symbol* name,
1823 const bool can_access_vm_annotations) {
1824 const vmSymbolID sid = vmSymbols::find_sid(name);
1825 // Privileged code can use all annotations. Other code silently drops some.
1826 const bool privileged = loader_data->is_boot_class_loader_data() ||
1827 loader_data->is_platform_class_loader_data() ||
1828 can_access_vm_annotations;
1829 switch (sid) {
1830 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1831 if (_location != _in_method) break; // only allow for methods
1832 if (!privileged) break; // only allow in privileged code
1833 return _method_CallerSensitive;
1834 }
1835 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1836 if (_location != _in_method) break; // only allow for methods
1837 if (!privileged) break; // only allow in privileged code
1838 return _method_ForceInline;
1839 }
1840 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1841 if (_location != _in_method) break; // only allow for methods
1842 if (!privileged) break; // only allow in privileged code
1843 return _method_DontInline;
1844 }
1845 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ChangesCurrentThread_signature): {
1846 if (_location != _in_method) break; // only allow for methods
1847 if (!privileged) break; // only allow in privileged code
1848 return _method_ChangesCurrentThread;
1849 }
1850 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiMountTransition_signature): {
1851 if (_location != _in_method) break; // only allow for methods
1852 if (!privileged) break; // only allow in privileged code
1853 return _method_JvmtiMountTransition;
1854 }
1855 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1856 if (_location != _in_method) break; // only allow for methods
1857 if (!privileged) break; // only allow in privileged code
1858 return _method_InjectedProfile;
1859 }
1860 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1861 if (_location != _in_method) break; // only allow for methods
1862 if (!privileged) break; // only allow in privileged code
1863 return _method_LambdaForm_Compiled;
1864 }
1865 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
1866 if (_location != _in_method) break; // only allow for methods
1867 if (!privileged) break; // only allow in privileged code
1868 return _method_Hidden;
1869 }
1870 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
1871 if (_location != _in_method) break; // only allow for methods
1872 if (!privileged) break; // only allow in privileged code
1873 return _method_Scoped;
1874 }
1875 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
1876 if (_location != _in_method) break; // only allow for methods
1877 if (!privileged) break; // only allow in privileged code
1878 return _method_IntrinsicCandidate;
1879 }
1880 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
1881 if (_location != _in_field) break; // only allow for fields
1882 if (!privileged) break; // only allow in privileged code
1883 return _field_Stable;
1884 }
1885 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
1886 if (_location != _in_field && _location != _in_class) {
1887 break; // only allow for fields and classes
1888 }
1889 if (!EnableContended || (RestrictContended && !privileged)) {
1890 break; // honor privileges
1891 }
1892 return _jdk_internal_vm_annotation_Contended;
1893 }
1894 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
1895 if (_location != _in_method) break; // only allow for methods
1896 if (RestrictReservedStack && !privileged) break; // honor privileges
1897 return _jdk_internal_vm_annotation_ReservedStackAccess;
1898 }
1899 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
1900 if (_location != _in_class) break; // only allow for classes
1901 if (!privileged) break; // only allow in privileged code
1902 return _jdk_internal_ValueBased;
1903 }
1904 case VM_SYMBOL_ENUM_NAME(java_lang_Deprecated): {
1905 return _java_lang_Deprecated;
1906 }
1907 default: {
1908 break;
1909 }
1910 }
1911 return AnnotationCollector::_unknown;
1912 }
1913
1914 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1915 if (is_contended())
1916 // Setting the contended group also sets the contended bit in field flags
1917 f->set_contended_group(contended_group());
1918 if (is_stable())
1919 (f->field_flags_addr())->update_stable(true);
1920 }
1921
1922 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
1923 // If there's an error deallocate metadata for field annotations
1924 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
1925 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
1926 }
1927
1928 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
1929 if (has_annotation(_method_CallerSensitive))
1930 m->set_caller_sensitive();
1931 if (has_annotation(_method_ForceInline))
1932 m->set_force_inline();
1933 if (has_annotation(_method_DontInline))
1934 m->set_dont_inline();
1935 if (has_annotation(_method_ChangesCurrentThread))
1936 m->set_changes_current_thread();
1937 if (has_annotation(_method_JvmtiMountTransition))
1938 m->set_jvmti_mount_transition();
1939 if (has_annotation(_method_InjectedProfile))
1940 m->set_has_injected_profile();
1941 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1942 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1943 if (has_annotation(_method_Hidden))
1944 m->set_is_hidden();
1945 if (has_annotation(_method_Scoped))
1946 m->set_scoped();
1947 if (has_annotation(_method_IntrinsicCandidate) && !m->is_synthetic())
1948 m->set_intrinsic_candidate();
1949 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
1950 m->set_has_reserved_stack_access();
1951 if (has_annotation(_java_lang_Deprecated))
1952 m->set_deprecated();
1953 if (has_annotation(_java_lang_Deprecated_for_removal))
1954 m->set_deprecated_for_removal();
1955 }
1956
1957 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
1958 assert(ik != nullptr, "invariant");
1959 if (has_annotation(_jdk_internal_vm_annotation_Contended)) {
1960 ik->set_is_contended(is_contended());
1961 }
1962 if (has_annotation(_jdk_internal_ValueBased)) {
1963 ik->set_has_value_based_class_annotation();
1964 if (DiagnoseSyncOnValueBasedClasses) {
1965 ik->set_is_value_based();
1966 }
1967 }
1968 if (has_annotation(_java_lang_Deprecated)) {
1969 Array<Method*>* methods = ik->methods();
1970 int length = ik->methods()->length();
1971 for (int i = 0; i < length; i++) {
1972 Method* m = methods->at(i);
1973 m->set_deprecated();
1974 }
1975 }
1976 if (has_annotation(_java_lang_Deprecated_for_removal)) {
1977 Array<Method*>* methods = ik->methods();
1978 int length = ik->methods()->length();
1979 for (int i = 0; i < length; i++) {
1980 Method* m = methods->at(i);
1981 m->set_deprecated_for_removal();
1982 }
1983 }
1984 }
1985
1986 #define MAX_ARGS_SIZE 255
1987 #define MAX_CODE_SIZE 65535
1988 #define INITIAL_MAX_LVT_NUMBER 256
1989
1990 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1991 *
1992 * Rules for LVT's and LVTT's are:
1993 * - There can be any number of LVT's and LVTT's.
1994 * - If there are n LVT's, it is the same as if there was just
1995 * one LVT containing all the entries from the n LVT's.
1996 * - There may be no more than one LVT entry per local variable.
1997 * Two LVT entries are 'equal' if these fields are the same:
1998 * start_pc, length, name, slot
1999 * - There may be no more than one LVTT entry per each LVT entry.
2000 * Each LVTT entry has to match some LVT entry.
2001 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2002 */
2003 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2004 int lvt_cnt,
2005 u2* const localvariable_table_length,
2006 const unsafe_u2** const localvariable_table_start,
2007 int lvtt_cnt,
2008 u2* const localvariable_type_table_length,
2009 const unsafe_u2** const localvariable_type_table_start,
2010 TRAPS) {
2011
2012 ResourceMark rm(THREAD);
2013
2014 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2015 256, AnyObj::RESOURCE_AREA, mtInternal,
2016 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2017
2018 LVT_HashTable* const table = new LVT_HashTable();
2019
2020 // To fill LocalVariableTable in
2021 const Classfile_LVT_Element* cf_lvt;
2022 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2023
2024 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2025 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2026 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2027 copy_lvt_element(&cf_lvt[idx], lvt);
2028 // If no duplicates, add LVT elem in hashtable.
2029 if (table->put(*lvt, lvt) == false
2030 && _need_verify
2031 && _major_version >= JAVA_1_5_VERSION) {
2032 classfile_parse_error("Duplicated LocalVariableTable attribute "
2033 "entry for '%s' in class file %s",
2034 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2035 THREAD);
2036 return;
2037 }
2038 }
2039 }
2040
2041 // To merge LocalVariableTable and LocalVariableTypeTable
2042 const Classfile_LVT_Element* cf_lvtt;
2043 LocalVariableTableElement lvtt_elem;
2044
2045 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2046 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2047 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2048 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2049 LocalVariableTableElement** entry = table->get(lvtt_elem);
2050 if (entry == nullptr) {
2051 if (_need_verify) {
2052 classfile_parse_error("LVTT entry for '%s' in class file %s "
2053 "does not match any LVT entry",
2054 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2055 THREAD);
2056 return;
2057 }
2058 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2059 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2060 "entry for '%s' in class file %s",
2061 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2062 THREAD);
2063 return;
2064 } else {
2065 // to add generic signatures into LocalVariableTable
2066 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2067 }
2068 }
2069 }
2070 }
2071
2072
2073 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2074 const u1* runtime_visible_annotations,
2075 int runtime_visible_annotations_length,
2076 const u1* runtime_visible_parameter_annotations,
2077 int runtime_visible_parameter_annotations_length,
2078 const u1* runtime_visible_type_annotations,
2079 int runtime_visible_type_annotations_length,
2080 const u1* annotation_default,
2081 int annotation_default_length,
2082 TRAPS) {
2083
2084 AnnotationArray* a;
2085
2086 if (runtime_visible_annotations_length > 0) {
2087 a = allocate_annotations(runtime_visible_annotations,
2088 runtime_visible_annotations_length,
2089 CHECK);
2090 cm->set_method_annotations(a);
2091 }
2092
2093 if (runtime_visible_parameter_annotations_length > 0) {
2094 a = allocate_annotations(runtime_visible_parameter_annotations,
2095 runtime_visible_parameter_annotations_length,
2096 CHECK);
2097 cm->set_parameter_annotations(a);
2098 }
2099
2100 if (annotation_default_length > 0) {
2101 a = allocate_annotations(annotation_default,
2102 annotation_default_length,
2103 CHECK);
2104 cm->set_default_annotations(a);
2105 }
2106
2107 if (runtime_visible_type_annotations_length > 0) {
2108 a = allocate_annotations(runtime_visible_type_annotations,
2109 runtime_visible_type_annotations_length,
2110 CHECK);
2111 cm->set_type_annotations(a);
2112 }
2113 }
2114
2115
2116 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2117 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2118 // Method* to save footprint, so we only know the size of the resulting Method* when the
2119 // entire method attribute is parsed.
2120 //
2121 // The has_localvariable_table parameter is used to pass up the value to InstanceKlass.
2122
2123 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2124 bool is_interface,
2125 const ConstantPool* cp,
2126 bool* const has_localvariable_table,
2127 TRAPS) {
2128 assert(cfs != nullptr, "invariant");
2129 assert(cp != nullptr, "invariant");
2130 assert(has_localvariable_table != nullptr, "invariant");
2131
2132 ResourceMark rm(THREAD);
2133 // Parse fixed parts:
2134 // access_flags, name_index, descriptor_index, attributes_count
2135 cfs->guarantee_more(8, CHECK_NULL);
2136
2137 int flags = cfs->get_u2_fast();
2138 const u2 name_index = cfs->get_u2_fast();
2139 const int cp_size = cp->length();
2140 check_property(
2141 valid_symbol_at(name_index),
2142 "Illegal constant pool index %u for method name in class file %s",
2143 name_index, CHECK_NULL);
2144 const Symbol* const name = cp->symbol_at(name_index);
2145 verify_legal_method_name(name, CHECK_NULL);
2146
2147 const u2 signature_index = cfs->get_u2_fast();
2148 guarantee_property(
2149 valid_symbol_at(signature_index),
2150 "Illegal constant pool index %u for method signature in class file %s",
2151 signature_index, CHECK_NULL);
2152 const Symbol* const signature = cp->symbol_at(signature_index);
2153
2154 if (name == vmSymbols::class_initializer_name()) {
2155 // We ignore the other access flags for a valid class initializer.
2156 // (JVM Spec 2nd ed., chapter 4.6)
2157 if (_major_version < 51) { // backward compatibility
2158 flags = JVM_ACC_STATIC;
2159 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2160 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2161 } else {
2162 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2163 return nullptr;
2164 }
2165 } else {
2166 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2167 }
2168
2169 if (name == vmSymbols::object_initializer_name() && is_interface) {
2170 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2171 return nullptr;
2172 }
2173
2174 int args_size = -1; // only used when _need_verify is true
2175 if (_need_verify) {
2176 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2177 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2178 verify_legal_method_signature(name, signature, CHECK_NULL);
2179 if (args_size > MAX_ARGS_SIZE) {
2180 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2181 return nullptr;
2182 }
2183 }
2184
2185 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2186
2187 // Default values for code and exceptions attribute elements
2188 u2 max_stack = 0;
2189 u2 max_locals = 0;
2190 u4 code_length = 0;
2191 const u1* code_start = nullptr;
2192 u2 exception_table_length = 0;
2193 const unsafe_u2* exception_table_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2194 Array<int>* exception_handlers = Universe::the_empty_int_array();
2195 u2 checked_exceptions_length = 0;
2196 const unsafe_u2* checked_exceptions_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2197 CompressedLineNumberWriteStream* linenumber_table = nullptr;
2198 int linenumber_table_length = 0;
2199 int total_lvt_length = 0;
2200 u2 lvt_cnt = 0;
2201 u2 lvtt_cnt = 0;
2202 bool lvt_allocated = false;
2203 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2204 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2205 u2* localvariable_table_length = nullptr;
2206 const unsafe_u2** localvariable_table_start = nullptr; // (potentially unaligned) pointer to array of LVT attributes
2207 u2* localvariable_type_table_length = nullptr;
2208 const unsafe_u2** localvariable_type_table_start = nullptr; // (potentially unaligned) pointer to LVTT attributes
2209 int method_parameters_length = -1;
2210 const u1* method_parameters_data = nullptr;
2211 bool method_parameters_seen = false;
2212 bool parsed_code_attribute = false;
2213 bool parsed_checked_exceptions_attribute = false;
2214 bool parsed_stackmap_attribute = false;
2215 // stackmap attribute - JDK1.5
2216 const u1* stackmap_data = nullptr;
2217 int stackmap_data_length = 0;
2218 u2 generic_signature_index = 0;
2219 MethodAnnotationCollector parsed_annotations;
2220 const u1* runtime_visible_annotations = nullptr;
2221 int runtime_visible_annotations_length = 0;
2222 const u1* runtime_visible_parameter_annotations = nullptr;
2223 int runtime_visible_parameter_annotations_length = 0;
2224 const u1* runtime_visible_type_annotations = nullptr;
2225 int runtime_visible_type_annotations_length = 0;
2226 bool runtime_invisible_annotations_exists = false;
2227 bool runtime_invisible_type_annotations_exists = false;
2228 bool runtime_invisible_parameter_annotations_exists = false;
2229 const u1* annotation_default = nullptr;
2230 int annotation_default_length = 0;
2231
2232 // Parse code and exceptions attribute
2233 u2 method_attributes_count = cfs->get_u2_fast();
2234 while (method_attributes_count--) {
2235 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2236 const u2 method_attribute_name_index = cfs->get_u2_fast();
2237 const u4 method_attribute_length = cfs->get_u4_fast();
2238 check_property(
2239 valid_symbol_at(method_attribute_name_index),
2240 "Invalid method attribute name index %u in class file %s",
2241 method_attribute_name_index, CHECK_NULL);
2242
2243 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2244 if (method_attribute_name == vmSymbols::tag_code()) {
2245 // Parse Code attribute
2246 if (_need_verify) {
2247 guarantee_property(
2248 !access_flags.is_native() && !access_flags.is_abstract(),
2249 "Code attribute in native or abstract methods in class file %s",
2250 CHECK_NULL);
2251 }
2252 if (parsed_code_attribute) {
2253 classfile_parse_error("Multiple Code attributes in class file %s",
2254 THREAD);
2255 return nullptr;
2256 }
2257 parsed_code_attribute = true;
2258
2259 // Stack size, locals size, and code size
2260 cfs->guarantee_more(8, CHECK_NULL);
2261 max_stack = cfs->get_u2_fast();
2262 max_locals = cfs->get_u2_fast();
2263 code_length = cfs->get_u4_fast();
2264 if (_need_verify) {
2265 guarantee_property(args_size <= max_locals,
2266 "Arguments can't fit into locals in class file %s",
2267 CHECK_NULL);
2268 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2269 "Invalid method Code length %u in class file %s",
2270 code_length, CHECK_NULL);
2271 }
2272 // Code pointer
2273 code_start = cfs->current();
2274 assert(code_start != nullptr, "null code start");
2275 cfs->guarantee_more(code_length, CHECK_NULL);
2276 cfs->skip_u1_fast(code_length);
2277
2278 // Exception handler table
2279 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2280 exception_table_length = cfs->get_u2_fast();
2281 if (exception_table_length > 0) {
2282 exception_table_start = parse_exception_table(cfs,
2283 code_length,
2284 exception_table_length,
2285 CHECK_NULL);
2286 }
2287
2288 // Parse additional attributes in code attribute
2289 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2290 u2 code_attributes_count = cfs->get_u2_fast();
2291
2292 unsigned int calculated_attribute_length = 0;
2293
2294 calculated_attribute_length =
2295 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2296 calculated_attribute_length += checked_cast<unsigned int>(
2297 code_length +
2298 sizeof(exception_table_length) +
2299 sizeof(code_attributes_count) +
2300 exception_table_length *
2301 ( sizeof(u2) + // start_pc
2302 sizeof(u2) + // end_pc
2303 sizeof(u2) + // handler_pc
2304 sizeof(u2) )); // catch_type_index
2305
2306 while (code_attributes_count--) {
2307 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2308 const u2 code_attribute_name_index = cfs->get_u2_fast();
2309 const u4 code_attribute_length = cfs->get_u4_fast();
2310 calculated_attribute_length += code_attribute_length +
2311 (unsigned)sizeof(code_attribute_name_index) +
2312 (unsigned)sizeof(code_attribute_length);
2313 check_property(valid_symbol_at(code_attribute_name_index),
2314 "Invalid code attribute name index %u in class file %s",
2315 code_attribute_name_index,
2316 CHECK_NULL);
2317 if (LoadLineNumberTables &&
2318 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2319 // Parse and compress line number table
2320 parse_linenumber_table(code_attribute_length,
2321 code_length,
2322 &linenumber_table,
2323 CHECK_NULL);
2324
2325 } else if (LoadLocalVariableTables &&
2326 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2327 // Parse local variable table
2328 if (!lvt_allocated) {
2329 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2330 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2331 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2332 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2333 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2334 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2335 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2336 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2337 lvt_allocated = true;
2338 }
2339 if (lvt_cnt == max_lvt_cnt) {
2340 max_lvt_cnt <<= 1;
2341 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2342 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2343 }
2344 localvariable_table_start[lvt_cnt] =
2345 parse_localvariable_table(cfs,
2346 code_length,
2347 max_locals,
2348 code_attribute_length,
2349 &localvariable_table_length[lvt_cnt],
2350 false, // is not LVTT
2351 CHECK_NULL);
2352 total_lvt_length += localvariable_table_length[lvt_cnt];
2353 lvt_cnt++;
2354 } else if (LoadLocalVariableTypeTables &&
2355 _major_version >= JAVA_1_5_VERSION &&
2356 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2357 if (!lvt_allocated) {
2358 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2359 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2360 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2361 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2362 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2363 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2364 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2365 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2366 lvt_allocated = true;
2367 }
2368 // Parse local variable type table
2369 if (lvtt_cnt == max_lvtt_cnt) {
2370 max_lvtt_cnt <<= 1;
2371 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2372 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2373 }
2374 localvariable_type_table_start[lvtt_cnt] =
2375 parse_localvariable_table(cfs,
2376 code_length,
2377 max_locals,
2378 code_attribute_length,
2379 &localvariable_type_table_length[lvtt_cnt],
2380 true, // is LVTT
2381 CHECK_NULL);
2382 lvtt_cnt++;
2383 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2384 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2385 // Stack map is only needed by the new verifier in JDK1.5.
2386 if (parsed_stackmap_attribute) {
2387 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2388 return nullptr;
2389 }
2390 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, CHECK_NULL);
2391 stackmap_data_length = code_attribute_length;
2392 parsed_stackmap_attribute = true;
2393 } else {
2394 // Skip unknown attributes
2395 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2396 }
2397 }
2398 // check method attribute length
2399 if (_need_verify) {
2400 guarantee_property(method_attribute_length == calculated_attribute_length,
2401 "Code segment has wrong length in class file %s",
2402 CHECK_NULL);
2403 }
2404 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2405 // Parse Exceptions attribute
2406 if (parsed_checked_exceptions_attribute) {
2407 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2408 THREAD);
2409 return nullptr;
2410 }
2411 parsed_checked_exceptions_attribute = true;
2412 checked_exceptions_start =
2413 parse_checked_exceptions(cfs,
2414 &checked_exceptions_length,
2415 method_attribute_length,
2416 CHECK_NULL);
2417 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2418 // reject multiple method parameters
2419 if (method_parameters_seen) {
2420 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2421 THREAD);
2422 return nullptr;
2423 }
2424 method_parameters_seen = true;
2425 method_parameters_length = cfs->get_u1_fast();
2426 const u4 real_length = (method_parameters_length * 4u) + 1u;
2427 if (method_attribute_length != real_length) {
2428 classfile_parse_error(
2429 "Invalid MethodParameters method attribute length %u in class file",
2430 method_attribute_length, THREAD);
2431 return nullptr;
2432 }
2433 method_parameters_data = cfs->current();
2434 cfs->skip_u2_fast(method_parameters_length);
2435 cfs->skip_u2_fast(method_parameters_length);
2436 // ignore this attribute if it cannot be reflected
2437 if (!vmClasses::Parameter_klass_loaded())
2438 method_parameters_length = -1;
2439 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2440 if (method_attribute_length != 0) {
2441 classfile_parse_error(
2442 "Invalid Synthetic method attribute length %u in class file %s",
2443 method_attribute_length, THREAD);
2444 return nullptr;
2445 }
2446 // Should we check that there hasn't already been a synthetic attribute?
2447 access_flags.set_is_synthetic();
2448 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2449 if (method_attribute_length != 0) {
2450 classfile_parse_error(
2451 "Invalid Deprecated method attribute length %u in class file %s",
2452 method_attribute_length, THREAD);
2453 return nullptr;
2454 }
2455 } else if (_major_version >= JAVA_1_5_VERSION) {
2456 if (method_attribute_name == vmSymbols::tag_signature()) {
2457 if (generic_signature_index != 0) {
2458 classfile_parse_error(
2459 "Multiple Signature attributes for method in class file %s",
2460 THREAD);
2461 return nullptr;
2462 }
2463 if (method_attribute_length != 2) {
2464 classfile_parse_error(
2465 "Invalid Signature attribute length %u in class file %s",
2466 method_attribute_length, THREAD);
2467 return nullptr;
2468 }
2469 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2470 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2471 if (runtime_visible_annotations != nullptr) {
2472 classfile_parse_error(
2473 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2474 THREAD);
2475 return nullptr;
2476 }
2477 runtime_visible_annotations_length = method_attribute_length;
2478 runtime_visible_annotations = cfs->current();
2479 assert(runtime_visible_annotations != nullptr, "null visible annotations");
2480 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2481 parse_annotations(cp,
2482 runtime_visible_annotations,
2483 runtime_visible_annotations_length,
2484 &parsed_annotations,
2485 _loader_data,
2486 _can_access_vm_annotations);
2487 cfs->skip_u1_fast(runtime_visible_annotations_length);
2488 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2489 if (runtime_invisible_annotations_exists) {
2490 classfile_parse_error(
2491 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2492 THREAD);
2493 return nullptr;
2494 }
2495 runtime_invisible_annotations_exists = true;
2496 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2497 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2498 if (runtime_visible_parameter_annotations != nullptr) {
2499 classfile_parse_error(
2500 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2501 THREAD);
2502 return nullptr;
2503 }
2504 runtime_visible_parameter_annotations_length = method_attribute_length;
2505 runtime_visible_parameter_annotations = cfs->current();
2506 assert(runtime_visible_parameter_annotations != nullptr, "null visible parameter annotations");
2507 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2508 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2509 if (runtime_invisible_parameter_annotations_exists) {
2510 classfile_parse_error(
2511 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2512 THREAD);
2513 return nullptr;
2514 }
2515 runtime_invisible_parameter_annotations_exists = true;
2516 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2517 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2518 if (annotation_default != nullptr) {
2519 classfile_parse_error(
2520 "Multiple AnnotationDefault attributes for method in class file %s",
2521 THREAD);
2522 return nullptr;
2523 }
2524 annotation_default_length = method_attribute_length;
2525 annotation_default = cfs->current();
2526 assert(annotation_default != nullptr, "null annotation default");
2527 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2528 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2529 if (runtime_visible_type_annotations != nullptr) {
2530 classfile_parse_error(
2531 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2532 THREAD);
2533 return nullptr;
2534 }
2535 runtime_visible_type_annotations_length = method_attribute_length;
2536 runtime_visible_type_annotations = cfs->current();
2537 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
2538 // No need for the VM to parse Type annotations
2539 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2540 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2541 if (runtime_invisible_type_annotations_exists) {
2542 classfile_parse_error(
2543 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2544 THREAD);
2545 return nullptr;
2546 }
2547 runtime_invisible_type_annotations_exists = true;
2548 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2549 } else {
2550 // Skip unknown attributes
2551 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2552 }
2553 } else {
2554 // Skip unknown attributes
2555 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2556 }
2557 }
2558
2559 if (linenumber_table != nullptr) {
2560 linenumber_table->write_terminator();
2561 linenumber_table_length = linenumber_table->position();
2562 }
2563
2564 // Make sure there's at least one Code attribute in non-native/non-abstract method
2565 if (_need_verify) {
2566 guarantee_property(access_flags.is_native() ||
2567 access_flags.is_abstract() ||
2568 parsed_code_attribute,
2569 "Absent Code attribute in method that is not native or abstract in class file %s",
2570 CHECK_NULL);
2571 }
2572
2573 // All sizing information for a Method* is finally available, now create it
2574 InlineTableSizes sizes(
2575 total_lvt_length,
2576 linenumber_table_length,
2577 exception_table_length,
2578 checked_exceptions_length,
2579 method_parameters_length,
2580 generic_signature_index,
2581 runtime_visible_annotations_length,
2582 runtime_visible_parameter_annotations_length,
2583 runtime_visible_type_annotations_length,
2584 annotation_default_length,
2585 0);
2586
2587 Method* const m = Method::allocate(_loader_data,
2588 code_length,
2589 access_flags,
2590 &sizes,
2591 ConstMethod::NORMAL,
2592 _cp->symbol_at(name_index),
2593 CHECK_NULL);
2594
2595 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2596
2597 // Fill in information from fixed part (access_flags already set)
2598 m->set_constants(_cp);
2599 m->set_name_index(name_index);
2600 m->set_signature_index(signature_index);
2601 m->constMethod()->compute_from_signature(cp->symbol_at(signature_index), access_flags.is_static());
2602 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2603
2604 // Fill in code attribute information
2605 m->set_max_stack(max_stack);
2606 m->set_max_locals(max_locals);
2607 if (stackmap_data != nullptr) {
2608 m->constMethod()->copy_stackmap_data(_loader_data,
2609 (u1*)stackmap_data,
2610 stackmap_data_length,
2611 CHECK_NULL);
2612 }
2613
2614 // Copy byte codes
2615 m->set_code((u1*)code_start);
2616
2617 // Copy line number table
2618 if (linenumber_table != nullptr) {
2619 memcpy(m->compressed_linenumber_table(),
2620 linenumber_table->buffer(),
2621 linenumber_table_length);
2622 }
2623
2624 // Copy exception table
2625 if (exception_table_length > 0) {
2626 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2627 m->exception_table_start(),
2628 exception_table_length * sizeof(ExceptionTableElement),
2629 sizeof(u2));
2630 }
2631
2632 // Copy method parameters
2633 if (method_parameters_length > 0) {
2634 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2635 for (int i = 0; i < method_parameters_length; i++) {
2636 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2637 method_parameters_data += 2;
2638 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2639 method_parameters_data += 2;
2640 }
2641 }
2642
2643 // Copy checked exceptions
2644 if (checked_exceptions_length > 0) {
2645 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2646 m->checked_exceptions_start(),
2647 checked_exceptions_length * sizeof(CheckedExceptionElement),
2648 sizeof(u2));
2649 }
2650
2651 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2652 if (total_lvt_length > 0) {
2653 *has_localvariable_table = true;
2654 copy_localvariable_table(m->constMethod(),
2655 lvt_cnt,
2656 localvariable_table_length,
2657 localvariable_table_start,
2658 lvtt_cnt,
2659 localvariable_type_table_length,
2660 localvariable_type_table_start,
2661 CHECK_NULL);
2662 }
2663
2664 if (parsed_annotations.has_any_annotations())
2665 parsed_annotations.apply_to(methodHandle(THREAD, m));
2666
2667 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2668 m->set_is_hidden();
2669 }
2670
2671 // Copy annotations
2672 copy_method_annotations(m->constMethod(),
2673 runtime_visible_annotations,
2674 runtime_visible_annotations_length,
2675 runtime_visible_parameter_annotations,
2676 runtime_visible_parameter_annotations_length,
2677 runtime_visible_type_annotations,
2678 runtime_visible_type_annotations_length,
2679 annotation_default,
2680 annotation_default_length,
2681 CHECK_NULL);
2682
2683 if (InstanceKlass::is_finalization_enabled() &&
2684 name == vmSymbols::finalize_method_name() &&
2685 signature == vmSymbols::void_method_signature()) {
2686 if (m->is_empty_method()) {
2687 _has_empty_finalizer = true;
2688 } else {
2689 _has_finalizer = true;
2690 }
2691 }
2692
2693 NOT_PRODUCT(m->verify());
2694 return m;
2695 }
2696
2697
2698 // Side-effects: populates the _methods field in the parser
2699 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2700 bool is_interface,
2701 bool* const has_localvariable_table,
2702 bool* has_final_method,
2703 bool* declares_nonstatic_concrete_methods,
2704 TRAPS) {
2705 assert(cfs != nullptr, "invariant");
2706 assert(has_localvariable_table != nullptr, "invariant");
2707 assert(has_final_method != nullptr, "invariant");
2708 assert(declares_nonstatic_concrete_methods != nullptr, "invariant");
2709
2710 assert(nullptr == _methods, "invariant");
2711
2712 cfs->guarantee_more(2, CHECK); // length
2713 const u2 length = cfs->get_u2_fast();
2714 if (length == 0) {
2715 _methods = Universe::the_empty_method_array();
2716 } else {
2717 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2718 length,
2719 nullptr,
2720 CHECK);
2721
2722 for (int index = 0; index < length; index++) {
2723 Method* method = parse_method(cfs,
2724 is_interface,
2725 _cp,
2726 has_localvariable_table,
2727 CHECK);
2728
2729 if (method->is_final()) {
2730 *has_final_method = true;
2731 }
2732 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2733 // used for interface initialization, and default method inheritance analysis
2734 if (is_interface && !(*declares_nonstatic_concrete_methods)
2735 && !method->is_abstract() && !method->is_static()) {
2736 *declares_nonstatic_concrete_methods = true;
2737 }
2738 _methods->at_put(index, method);
2739 }
2740
2741 if (_need_verify && length > 1) {
2742 // Check duplicated methods
2743 ResourceMark rm(THREAD);
2744 // Set containing name-signature pairs
2745 NameSigHashtable* names_and_sigs = new NameSigHashtable();
2746 for (int i = 0; i < length; i++) {
2747 const Method* const m = _methods->at(i);
2748 NameSigHash name_and_sig(m->name(), m->signature());
2749 // If no duplicates, add name/signature in hashtable names_and_sigs.
2750 if(!names_and_sigs->put(name_and_sig, 0)) {
2751 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2752 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
2753 return;
2754 }
2755 }
2756 }
2757 }
2758 }
2759
2760 static const intArray* sort_methods(Array<Method*>* methods) {
2761 const int length = methods->length();
2762 // If JVMTI original method ordering or sharing is enabled we have to
2763 // remember the original class file ordering.
2764 // We temporarily use the vtable_index field in the Method* to store the
2765 // class file index, so we can read in after calling qsort.
2766 // Put the method ordering in the shared archive.
2767 if (JvmtiExport::can_maintain_original_method_order() || CDSConfig::is_dumping_archive()) {
2768 for (int index = 0; index < length; index++) {
2769 Method* const m = methods->at(index);
2770 assert(!m->valid_vtable_index(), "vtable index should not be set");
2771 m->set_vtable_index(index);
2772 }
2773 }
2774 // Sort method array by ascending method name (for faster lookups & vtable construction)
2775 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2776 Method::sort_methods(methods);
2777
2778 intArray* method_ordering = nullptr;
2779 // If JVMTI original method ordering or sharing is enabled construct int
2780 // array remembering the original ordering
2781 if (JvmtiExport::can_maintain_original_method_order() || CDSConfig::is_dumping_archive()) {
2782 method_ordering = new intArray(length, length, -1);
2783 for (int index = 0; index < length; index++) {
2784 Method* const m = methods->at(index);
2785 const int old_index = m->vtable_index();
2786 assert(old_index >= 0 && old_index < length, "invalid method index");
2787 method_ordering->at_put(index, old_index);
2788 m->set_vtable_index(Method::invalid_vtable_index);
2789 }
2790 }
2791 return method_ordering;
2792 }
2793
2794 // Parse generic_signature attribute for methods and fields
2795 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2796 TRAPS) {
2797 assert(cfs != nullptr, "invariant");
2798
2799 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2800 const u2 generic_signature_index = cfs->get_u2_fast();
2801 check_property(
2802 valid_symbol_at(generic_signature_index),
2803 "Invalid Signature attribute at constant pool index %u in class file %s",
2804 generic_signature_index, CHECK_0);
2805 return generic_signature_index;
2806 }
2807
2808 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2809 TRAPS) {
2810
2811 assert(cfs != nullptr, "invariant");
2812
2813 cfs->guarantee_more(2, CHECK); // sourcefile_index
2814 const u2 sourcefile_index = cfs->get_u2_fast();
2815 check_property(
2816 valid_symbol_at(sourcefile_index),
2817 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2818 sourcefile_index, CHECK);
2819 set_class_sourcefile_index(sourcefile_index);
2820 }
2821
2822 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2823 int length,
2824 TRAPS) {
2825 assert(cfs != nullptr, "invariant");
2826
2827 const u1* const sde_buffer = cfs->current();
2828 assert(sde_buffer != nullptr, "null sde buffer");
2829
2830 // Don't bother storing it if there is no way to retrieve it
2831 if (JvmtiExport::can_get_source_debug_extension()) {
2832 assert((length+1) > length, "Overflow checking");
2833 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2834 for (int i = 0; i < length; i++) {
2835 sde[i] = sde_buffer[i];
2836 }
2837 sde[length] = '\0';
2838 set_class_sde_buffer((const char*)sde, length);
2839 }
2840 // Got utf8 string, set stream position forward
2841 cfs->skip_u1(length, CHECK);
2842 }
2843
2844
2845 // Inner classes can be static, private or protected (classic VM does this)
2846 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2847 JVM_ACC_PRIVATE | \
2848 JVM_ACC_PROTECTED | \
2849 JVM_ACC_STATIC \
2850 )
2851
2852 // Find index of the InnerClasses entry for the specified inner_class_info_index.
2853 // Return -1 if none is found.
2854 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
2855 Symbol* cp_klass_name = cp->klass_name_at(inner);
2856 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
2857 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
2858 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
2859 return idx;
2860 }
2861 }
2862 return -1;
2863 }
2864
2865 // Return the outer_class_info_index for the InnerClasses entry containing the
2866 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
2867 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
2868 if (inner == 0) return -1;
2869 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
2870 if (idx == -1) return -1;
2871 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
2872 return result;
2873 }
2874
2875 // Return true if circularity is found, false if no circularity is found.
2876 // Use Floyd's cycle finding algorithm.
2877 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
2878 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
2879 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
2880
2881 while (fast != -1 && fast != 0) {
2882 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
2883 return true; // found a circularity
2884 }
2885 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
2886 if (fast == -1) return false;
2887 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
2888 if (fast == -1) return false;
2889 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
2890 assert(slow != -1, "sanity check");
2891 }
2892 return false;
2893 }
2894
2895 // Loop through each InnerClasses entry checking for circularities and duplications
2896 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
2897 // return true if a circularity or entries with duplicate inner_class_info_indexes
2898 // are found.
2899 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
2900 // Loop through each InnerClasses entry.
2901 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
2902 // Return true if there are circular entries.
2903 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
2904 return true;
2905 }
2906 // Check if there are duplicate entries or entries with the same inner_class_info_index.
2907 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
2908 y += InstanceKlass::inner_class_next_offset) {
2909
2910 // 4347400: make sure there's no duplicate entry in the classes array
2911 if (_major_version >= JAVA_1_5_VERSION) {
2912 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
2913 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
2914 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
2915 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
2916 "Duplicate entry in InnerClasses attribute in class file %s",
2917 CHECK_(true));
2918 }
2919 // Return true if there are two entries with the same inner_class_info_index.
2920 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
2921 return true;
2922 }
2923 }
2924 }
2925 return false;
2926 }
2927
2928 // Return number of classes in the inner classes attribute table
2929 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
2930 const ConstantPool* cp,
2931 const u1* const inner_classes_attribute_start,
2932 bool parsed_enclosingmethod_attribute,
2933 u2 enclosing_method_class_index,
2934 u2 enclosing_method_method_index,
2935 TRAPS) {
2936 const u1* const current_mark = cfs->current();
2937 u2 length = 0;
2938 if (inner_classes_attribute_start != nullptr) {
2939 cfs->set_current(inner_classes_attribute_start);
2940 cfs->guarantee_more(2, CHECK_0); // length
2941 length = cfs->get_u2_fast();
2942 }
2943
2944 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2945 // method data:
2946 // [inner_class_info_index,
2947 // outer_class_info_index,
2948 // inner_name_index,
2949 // inner_class_access_flags,
2950 // ...
2951 // enclosing_method_class_index,
2952 // enclosing_method_method_index]
2953 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2954 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
2955 _inner_classes = inner_classes;
2956
2957 int index = 0;
2958 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2959 for (int n = 0; n < length; n++) {
2960 // Inner class index
2961 const u2 inner_class_info_index = cfs->get_u2_fast();
2962 check_property(
2963 valid_klass_reference_at(inner_class_info_index),
2964 "inner_class_info_index %u has bad constant type in class file %s",
2965 inner_class_info_index, CHECK_0);
2966 // Outer class index
2967 const u2 outer_class_info_index = cfs->get_u2_fast();
2968 check_property(
2969 outer_class_info_index == 0 ||
2970 valid_klass_reference_at(outer_class_info_index),
2971 "outer_class_info_index %u has bad constant type in class file %s",
2972 outer_class_info_index, CHECK_0);
2973
2974 if (outer_class_info_index != 0) {
2975 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
2976 char* bytes = (char*)outer_class_name->bytes();
2977 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
2978 "Outer class is an array class in class file %s", CHECK_0);
2979 }
2980 // Inner class name
2981 const u2 inner_name_index = cfs->get_u2_fast();
2982 check_property(
2983 inner_name_index == 0 || valid_symbol_at(inner_name_index),
2984 "inner_name_index %u has bad constant type in class file %s",
2985 inner_name_index, CHECK_0);
2986 if (_need_verify) {
2987 guarantee_property(inner_class_info_index != outer_class_info_index,
2988 "Class is both outer and inner class in class file %s", CHECK_0);
2989 }
2990 // Access flags
2991 jint flags;
2992 // JVM_ACC_MODULE is defined in JDK-9 and later.
2993 if (_major_version >= JAVA_9_VERSION) {
2994 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
2995 } else {
2996 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2997 }
2998 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2999 // Set abstract bit for old class files for backward compatibility
3000 flags |= JVM_ACC_ABSTRACT;
3001 }
3002 verify_legal_class_modifiers(flags, CHECK_0);
3003 AccessFlags inner_access_flags(flags);
3004
3005 inner_classes->at_put(index++, inner_class_info_index);
3006 inner_classes->at_put(index++, outer_class_info_index);
3007 inner_classes->at_put(index++, inner_name_index);
3008 inner_classes->at_put(index++, inner_access_flags.as_short());
3009 }
3010
3011 // Check for circular and duplicate entries.
3012 bool has_circularity = false;
3013 if (_need_verify) {
3014 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3015 if (has_circularity) {
3016 // If circularity check failed then ignore InnerClasses attribute.
3017 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3018 index = 0;
3019 if (parsed_enclosingmethod_attribute) {
3020 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3021 _inner_classes = inner_classes;
3022 } else {
3023 _inner_classes = Universe::the_empty_short_array();
3024 }
3025 }
3026 }
3027 // Set EnclosingMethod class and method indexes.
3028 if (parsed_enclosingmethod_attribute) {
3029 inner_classes->at_put(index++, enclosing_method_class_index);
3030 inner_classes->at_put(index++, enclosing_method_method_index);
3031 }
3032 assert(index == size || has_circularity, "wrong size");
3033
3034 // Restore buffer's current position.
3035 cfs->set_current(current_mark);
3036
3037 return length;
3038 }
3039
3040 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3041 const u1* const nest_members_attribute_start,
3042 TRAPS) {
3043 const u1* const current_mark = cfs->current();
3044 u2 length = 0;
3045 if (nest_members_attribute_start != nullptr) {
3046 cfs->set_current(nest_members_attribute_start);
3047 cfs->guarantee_more(2, CHECK_0); // length
3048 length = cfs->get_u2_fast();
3049 }
3050 const int size = length;
3051 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3052 _nest_members = nest_members;
3053
3054 int index = 0;
3055 cfs->guarantee_more(2 * length, CHECK_0);
3056 for (int n = 0; n < length; n++) {
3057 const u2 class_info_index = cfs->get_u2_fast();
3058 check_property(
3059 valid_klass_reference_at(class_info_index),
3060 "Nest member class_info_index %u has bad constant type in class file %s",
3061 class_info_index, CHECK_0);
3062 nest_members->at_put(index++, class_info_index);
3063 }
3064 assert(index == size, "wrong size");
3065
3066 // Restore buffer's current position.
3067 cfs->set_current(current_mark);
3068
3069 return length;
3070 }
3071
3072 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3073 const u1* const permitted_subclasses_attribute_start,
3074 TRAPS) {
3075 const u1* const current_mark = cfs->current();
3076 u2 length = 0;
3077 if (permitted_subclasses_attribute_start != nullptr) {
3078 cfs->set_current(permitted_subclasses_attribute_start);
3079 cfs->guarantee_more(2, CHECK_0); // length
3080 length = cfs->get_u2_fast();
3081 }
3082 const int size = length;
3083 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3084 _permitted_subclasses = permitted_subclasses;
3085
3086 if (length > 0) {
3087 int index = 0;
3088 cfs->guarantee_more(2 * length, CHECK_0);
3089 for (int n = 0; n < length; n++) {
3090 const u2 class_info_index = cfs->get_u2_fast();
3091 check_property(
3092 valid_klass_reference_at(class_info_index),
3093 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3094 class_info_index, CHECK_0);
3095 permitted_subclasses->at_put(index++, class_info_index);
3096 }
3097 assert(index == size, "wrong size");
3098 }
3099
3100 // Restore buffer's current position.
3101 cfs->set_current(current_mark);
3102
3103 return length;
3104 }
3105
3106 // Record {
3107 // u2 attribute_name_index;
3108 // u4 attribute_length;
3109 // u2 components_count;
3110 // component_info components[components_count];
3111 // }
3112 // component_info {
3113 // u2 name_index;
3114 // u2 descriptor_index
3115 // u2 attributes_count;
3116 // attribute_info_attributes[attributes_count];
3117 // }
3118 u4 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3119 const ConstantPool* cp,
3120 const u1* const record_attribute_start,
3121 TRAPS) {
3122 const u1* const current_mark = cfs->current();
3123 int components_count = 0;
3124 unsigned int calculate_attr_size = 0;
3125 if (record_attribute_start != nullptr) {
3126 cfs->set_current(record_attribute_start);
3127 cfs->guarantee_more(2, CHECK_0); // num of components
3128 components_count = (int)cfs->get_u2_fast();
3129 calculate_attr_size = 2;
3130 }
3131
3132 Array<RecordComponent*>* const record_components =
3133 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, nullptr, CHECK_0);
3134 _record_components = record_components;
3135
3136 for (int x = 0; x < components_count; x++) {
3137 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3138
3139 const u2 name_index = cfs->get_u2_fast();
3140 check_property(valid_symbol_at(name_index),
3141 "Invalid constant pool index %u for name in Record attribute in class file %s",
3142 name_index, CHECK_0);
3143 const Symbol* const name = cp->symbol_at(name_index);
3144 verify_legal_field_name(name, CHECK_0);
3145
3146 const u2 descriptor_index = cfs->get_u2_fast();
3147 check_property(valid_symbol_at(descriptor_index),
3148 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3149 descriptor_index, CHECK_0);
3150 const Symbol* const descr = cp->symbol_at(descriptor_index);
3151 verify_legal_field_signature(name, descr, CHECK_0);
3152
3153 const u2 attributes_count = cfs->get_u2_fast();
3154 calculate_attr_size += 6;
3155 u2 generic_sig_index = 0;
3156 const u1* runtime_visible_annotations = nullptr;
3157 int runtime_visible_annotations_length = 0;
3158 bool runtime_invisible_annotations_exists = false;
3159 const u1* runtime_visible_type_annotations = nullptr;
3160 int runtime_visible_type_annotations_length = 0;
3161 bool runtime_invisible_type_annotations_exists = false;
3162
3163 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3164 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3165 for (int y = 0; y < attributes_count; y++) {
3166 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3167 const u2 attribute_name_index = cfs->get_u2_fast();
3168 const u4 attribute_length = cfs->get_u4_fast();
3169 calculate_attr_size += 6;
3170 check_property(
3171 valid_symbol_at(attribute_name_index),
3172 "Invalid Record attribute name index %u in class file %s",
3173 attribute_name_index, CHECK_0);
3174
3175 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3176 if (attribute_name == vmSymbols::tag_signature()) {
3177 if (generic_sig_index != 0) {
3178 classfile_parse_error(
3179 "Multiple Signature attributes for Record component in class file %s",
3180 THREAD);
3181 return 0;
3182 }
3183 if (attribute_length != 2) {
3184 classfile_parse_error(
3185 "Invalid Signature attribute length %u in Record component in class file %s",
3186 attribute_length, THREAD);
3187 return 0;
3188 }
3189 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3190
3191 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3192 if (runtime_visible_annotations != nullptr) {
3193 classfile_parse_error(
3194 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3195 return 0;
3196 }
3197 runtime_visible_annotations_length = attribute_length;
3198 runtime_visible_annotations = cfs->current();
3199
3200 assert(runtime_visible_annotations != nullptr, "null record component visible annotation");
3201 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3202 cfs->skip_u1_fast(runtime_visible_annotations_length);
3203
3204 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3205 if (runtime_invisible_annotations_exists) {
3206 classfile_parse_error(
3207 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3208 return 0;
3209 }
3210 runtime_invisible_annotations_exists = true;
3211 cfs->skip_u1(attribute_length, CHECK_0);
3212
3213 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3214 if (runtime_visible_type_annotations != nullptr) {
3215 classfile_parse_error(
3216 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3217 return 0;
3218 }
3219 runtime_visible_type_annotations_length = attribute_length;
3220 runtime_visible_type_annotations = cfs->current();
3221
3222 assert(runtime_visible_type_annotations != nullptr, "null record component visible type annotation");
3223 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3224 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3225
3226 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3227 if (runtime_invisible_type_annotations_exists) {
3228 classfile_parse_error(
3229 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3230 return 0;
3231 }
3232 runtime_invisible_type_annotations_exists = true;
3233 cfs->skip_u1(attribute_length, CHECK_0);
3234
3235 } else {
3236 // Skip unknown attributes
3237 cfs->skip_u1(attribute_length, CHECK_0);
3238 }
3239 calculate_attr_size += attribute_length;
3240 } // End of attributes For loop
3241
3242 AnnotationArray* annotations = allocate_annotations(runtime_visible_annotations,
3243 runtime_visible_annotations_length,
3244 CHECK_0);
3245 AnnotationArray* type_annotations = allocate_annotations(runtime_visible_type_annotations,
3246 runtime_visible_type_annotations_length,
3247 CHECK_0);
3248
3249 RecordComponent* record_component =
3250 RecordComponent::allocate(_loader_data, name_index, descriptor_index, generic_sig_index,
3251 annotations, type_annotations, CHECK_0);
3252 record_components->at_put(x, record_component);
3253 } // End of component processing loop
3254
3255 // Restore buffer's current position.
3256 cfs->set_current(current_mark);
3257 return calculate_attr_size;
3258 }
3259
3260 void ClassFileParser::parse_classfile_synthetic_attribute() {
3261 set_class_synthetic_flag(true);
3262 }
3263
3264 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3265 assert(cfs != nullptr, "invariant");
3266
3267 const u2 signature_index = cfs->get_u2(CHECK);
3268 check_property(
3269 valid_symbol_at(signature_index),
3270 "Invalid constant pool index %u in Signature attribute in class file %s",
3271 signature_index, CHECK);
3272 set_class_generic_signature_index(signature_index);
3273 }
3274
3275 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3276 ConstantPool* cp,
3277 u4 attribute_byte_length,
3278 TRAPS) {
3279 assert(cfs != nullptr, "invariant");
3280 assert(cp != nullptr, "invariant");
3281
3282 const u1* const current_start = cfs->current();
3283
3284 guarantee_property(attribute_byte_length >= sizeof(u2),
3285 "Invalid BootstrapMethods attribute length %u in class file %s",
3286 attribute_byte_length,
3287 CHECK);
3288
3289 cfs->guarantee_more(attribute_byte_length, CHECK);
3290
3291 const int attribute_array_length = cfs->get_u2_fast();
3292
3293 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3294 "Short length on BootstrapMethods in class file %s",
3295 CHECK);
3296
3297
3298 // The attribute contains a counted array of counted tuples of shorts,
3299 // represending bootstrap specifiers:
3300 // length*{bootstrap_method_index, argument_count*{argument_index}}
3301 const unsigned int operand_count = (attribute_byte_length - (unsigned)sizeof(u2)) / (unsigned)sizeof(u2);
3302 // operand_count = number of shorts in attr, except for leading length
3303
3304 // The attribute is copied into a short[] array.
3305 // The array begins with a series of short[2] pairs, one for each tuple.
3306 const int index_size = (attribute_array_length * 2);
3307
3308 Array<u2>* const operands =
3309 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3310
3311 // Eagerly assign operands so they will be deallocated with the constant
3312 // pool if there is an error.
3313 cp->set_operands(operands);
3314
3315 int operand_fill_index = index_size;
3316 const int cp_size = cp->length();
3317
3318 for (int n = 0; n < attribute_array_length; n++) {
3319 // Store a 32-bit offset into the header of the operand array.
3320 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3321
3322 // Read a bootstrap specifier.
3323 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3324 const u2 bootstrap_method_index = cfs->get_u2_fast();
3325 const u2 argument_count = cfs->get_u2_fast();
3326 check_property(
3327 valid_cp_range(bootstrap_method_index, cp_size) &&
3328 cp->tag_at(bootstrap_method_index).is_method_handle(),
3329 "bootstrap_method_index %u has bad constant type in class file %s",
3330 bootstrap_method_index,
3331 CHECK);
3332
3333 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3334 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3335 CHECK);
3336
3337 operands->at_put(operand_fill_index++, bootstrap_method_index);
3338 operands->at_put(operand_fill_index++, argument_count);
3339
3340 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3341 for (int j = 0; j < argument_count; j++) {
3342 const u2 argument_index = cfs->get_u2_fast();
3343 check_property(
3344 valid_cp_range(argument_index, cp_size) &&
3345 cp->tag_at(argument_index).is_loadable_constant(),
3346 "argument_index %u has bad constant type in class file %s",
3347 argument_index,
3348 CHECK);
3349 operands->at_put(operand_fill_index++, argument_index);
3350 }
3351 }
3352 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3353 "Bad length on BootstrapMethods in class file %s",
3354 CHECK);
3355 }
3356
3357 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3358 ConstantPool* cp,
3359 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3360 TRAPS) {
3361 assert(cfs != nullptr, "invariant");
3362 assert(cp != nullptr, "invariant");
3363 assert(parsed_annotations != nullptr, "invariant");
3364
3365 // Set inner classes attribute to default sentinel
3366 _inner_classes = Universe::the_empty_short_array();
3367 // Set nest members attribute to default sentinel
3368 _nest_members = Universe::the_empty_short_array();
3369 // Set _permitted_subclasses attribute to default sentinel
3370 _permitted_subclasses = Universe::the_empty_short_array();
3371 cfs->guarantee_more(2, CHECK); // attributes_count
3372 u2 attributes_count = cfs->get_u2_fast();
3373 bool parsed_sourcefile_attribute = false;
3374 bool parsed_innerclasses_attribute = false;
3375 bool parsed_nest_members_attribute = false;
3376 bool parsed_permitted_subclasses_attribute = false;
3377 bool parsed_nest_host_attribute = false;
3378 bool parsed_record_attribute = false;
3379 bool parsed_enclosingmethod_attribute = false;
3380 bool parsed_bootstrap_methods_attribute = false;
3381 const u1* runtime_visible_annotations = nullptr;
3382 int runtime_visible_annotations_length = 0;
3383 const u1* runtime_visible_type_annotations = nullptr;
3384 int runtime_visible_type_annotations_length = 0;
3385 bool runtime_invisible_type_annotations_exists = false;
3386 bool runtime_invisible_annotations_exists = false;
3387 bool parsed_source_debug_ext_annotations_exist = false;
3388 const u1* inner_classes_attribute_start = nullptr;
3389 u4 inner_classes_attribute_length = 0;
3390 u2 enclosing_method_class_index = 0;
3391 u2 enclosing_method_method_index = 0;
3392 const u1* nest_members_attribute_start = nullptr;
3393 u4 nest_members_attribute_length = 0;
3394 const u1* record_attribute_start = nullptr;
3395 u4 record_attribute_length = 0;
3396 const u1* permitted_subclasses_attribute_start = nullptr;
3397 u4 permitted_subclasses_attribute_length = 0;
3398
3399 // Iterate over attributes
3400 while (attributes_count--) {
3401 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3402 const u2 attribute_name_index = cfs->get_u2_fast();
3403 const u4 attribute_length = cfs->get_u4_fast();
3404 check_property(
3405 valid_symbol_at(attribute_name_index),
3406 "Attribute name has bad constant pool index %u in class file %s",
3407 attribute_name_index, CHECK);
3408 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3409 if (tag == vmSymbols::tag_source_file()) {
3410 // Check for SourceFile tag
3411 if (_need_verify) {
3412 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3413 }
3414 if (parsed_sourcefile_attribute) {
3415 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3416 return;
3417 } else {
3418 parsed_sourcefile_attribute = true;
3419 }
3420 parse_classfile_sourcefile_attribute(cfs, CHECK);
3421 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3422 // Check for SourceDebugExtension tag
3423 if (parsed_source_debug_ext_annotations_exist) {
3424 classfile_parse_error(
3425 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3426 return;
3427 }
3428 parsed_source_debug_ext_annotations_exist = true;
3429 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3430 } else if (tag == vmSymbols::tag_inner_classes()) {
3431 // Check for InnerClasses tag
3432 if (parsed_innerclasses_attribute) {
3433 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3434 return;
3435 } else {
3436 parsed_innerclasses_attribute = true;
3437 }
3438 inner_classes_attribute_start = cfs->current();
3439 inner_classes_attribute_length = attribute_length;
3440 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3441 } else if (tag == vmSymbols::tag_synthetic()) {
3442 // Check for Synthetic tag
3443 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3444 if (attribute_length != 0) {
3445 classfile_parse_error(
3446 "Invalid Synthetic classfile attribute length %u in class file %s",
3447 attribute_length, THREAD);
3448 return;
3449 }
3450 parse_classfile_synthetic_attribute();
3451 } else if (tag == vmSymbols::tag_deprecated()) {
3452 // Check for Deprecated tag - 4276120
3453 if (attribute_length != 0) {
3454 classfile_parse_error(
3455 "Invalid Deprecated classfile attribute length %u in class file %s",
3456 attribute_length, THREAD);
3457 return;
3458 }
3459 } else if (_major_version >= JAVA_1_5_VERSION) {
3460 if (tag == vmSymbols::tag_signature()) {
3461 if (_generic_signature_index != 0) {
3462 classfile_parse_error(
3463 "Multiple Signature attributes in class file %s", THREAD);
3464 return;
3465 }
3466 if (attribute_length != 2) {
3467 classfile_parse_error(
3468 "Wrong Signature attribute length %u in class file %s",
3469 attribute_length, THREAD);
3470 return;
3471 }
3472 parse_classfile_signature_attribute(cfs, CHECK);
3473 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3474 if (runtime_visible_annotations != nullptr) {
3475 classfile_parse_error(
3476 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3477 return;
3478 }
3479 runtime_visible_annotations_length = attribute_length;
3480 runtime_visible_annotations = cfs->current();
3481 assert(runtime_visible_annotations != nullptr, "null visible annotations");
3482 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3483 parse_annotations(cp,
3484 runtime_visible_annotations,
3485 runtime_visible_annotations_length,
3486 parsed_annotations,
3487 _loader_data,
3488 _can_access_vm_annotations);
3489 cfs->skip_u1_fast(runtime_visible_annotations_length);
3490 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3491 if (runtime_invisible_annotations_exists) {
3492 classfile_parse_error(
3493 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3494 return;
3495 }
3496 runtime_invisible_annotations_exists = true;
3497 cfs->skip_u1(attribute_length, CHECK);
3498 } else if (tag == vmSymbols::tag_enclosing_method()) {
3499 if (parsed_enclosingmethod_attribute) {
3500 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3501 return;
3502 } else {
3503 parsed_enclosingmethod_attribute = true;
3504 }
3505 guarantee_property(attribute_length == 4,
3506 "Wrong EnclosingMethod attribute length %u in class file %s",
3507 attribute_length, CHECK);
3508 cfs->guarantee_more(4, CHECK); // class_index, method_index
3509 enclosing_method_class_index = cfs->get_u2_fast();
3510 enclosing_method_method_index = cfs->get_u2_fast();
3511 if (enclosing_method_class_index == 0) {
3512 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3513 return;
3514 }
3515 // Validate the constant pool indices and types
3516 check_property(valid_klass_reference_at(enclosing_method_class_index),
3517 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3518 if (enclosing_method_method_index != 0 &&
3519 (!cp->is_within_bounds(enclosing_method_method_index) ||
3520 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3521 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3522 return;
3523 }
3524 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3525 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3526 if (parsed_bootstrap_methods_attribute) {
3527 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3528 return;
3529 }
3530 parsed_bootstrap_methods_attribute = true;
3531 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3532 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3533 if (runtime_visible_type_annotations != nullptr) {
3534 classfile_parse_error(
3535 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3536 return;
3537 }
3538 runtime_visible_type_annotations_length = attribute_length;
3539 runtime_visible_type_annotations = cfs->current();
3540 assert(runtime_visible_type_annotations != nullptr, "null visible type annotations");
3541 // No need for the VM to parse Type annotations
3542 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3543 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3544 if (runtime_invisible_type_annotations_exists) {
3545 classfile_parse_error(
3546 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3547 return;
3548 }
3549 runtime_invisible_type_annotations_exists = true;
3550 cfs->skip_u1(attribute_length, CHECK);
3551 } else if (_major_version >= JAVA_11_VERSION) {
3552 if (tag == vmSymbols::tag_nest_members()) {
3553 // Check for NestMembers tag
3554 if (parsed_nest_members_attribute) {
3555 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3556 return;
3557 } else {
3558 parsed_nest_members_attribute = true;
3559 }
3560 if (parsed_nest_host_attribute) {
3561 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3562 return;
3563 }
3564 nest_members_attribute_start = cfs->current();
3565 nest_members_attribute_length = attribute_length;
3566 cfs->skip_u1(nest_members_attribute_length, CHECK);
3567 } else if (tag == vmSymbols::tag_nest_host()) {
3568 if (parsed_nest_host_attribute) {
3569 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
3570 return;
3571 } else {
3572 parsed_nest_host_attribute = true;
3573 }
3574 if (parsed_nest_members_attribute) {
3575 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
3576 return;
3577 }
3578 if (_need_verify) {
3579 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3580 }
3581 cfs->guarantee_more(2, CHECK);
3582 u2 class_info_index = cfs->get_u2_fast();
3583 check_property(
3584 valid_klass_reference_at(class_info_index),
3585 "Nest-host class_info_index %u has bad constant type in class file %s",
3586 class_info_index, CHECK);
3587 _nest_host = class_info_index;
3588
3589 } else if (_major_version >= JAVA_16_VERSION) {
3590 if (tag == vmSymbols::tag_record()) {
3591 if (parsed_record_attribute) {
3592 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
3593 return;
3594 }
3595 parsed_record_attribute = true;
3596 record_attribute_start = cfs->current();
3597 record_attribute_length = attribute_length;
3598 } else if (_major_version >= JAVA_17_VERSION) {
3599 if (tag == vmSymbols::tag_permitted_subclasses()) {
3600 if (parsed_permitted_subclasses_attribute) {
3601 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3602 return;
3603 }
3604 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3605 if (_access_flags.is_final()) {
3606 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3607 return;
3608 }
3609 parsed_permitted_subclasses_attribute = true;
3610 permitted_subclasses_attribute_start = cfs->current();
3611 permitted_subclasses_attribute_length = attribute_length;
3612 }
3613 }
3614 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3615 cfs->skip_u1(attribute_length, CHECK);
3616 } else {
3617 // Unknown attribute
3618 cfs->skip_u1(attribute_length, CHECK);
3619 }
3620 } else {
3621 // Unknown attribute
3622 cfs->skip_u1(attribute_length, CHECK);
3623 }
3624 } else {
3625 // Unknown attribute
3626 cfs->skip_u1(attribute_length, CHECK);
3627 }
3628 }
3629 _class_annotations = allocate_annotations(runtime_visible_annotations,
3630 runtime_visible_annotations_length,
3631 CHECK);
3632 _class_type_annotations = allocate_annotations(runtime_visible_type_annotations,
3633 runtime_visible_type_annotations_length,
3634 CHECK);
3635
3636 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3637 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3638 cfs,
3639 cp,
3640 inner_classes_attribute_start,
3641 parsed_innerclasses_attribute,
3642 enclosing_method_class_index,
3643 enclosing_method_method_index,
3644 CHECK);
3645 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3646 guarantee_property(
3647 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3648 "Wrong InnerClasses attribute length in class file %s", CHECK);
3649 }
3650 }
3651
3652 if (parsed_nest_members_attribute) {
3653 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3654 cfs,
3655 nest_members_attribute_start,
3656 CHECK);
3657 if (_need_verify) {
3658 guarantee_property(
3659 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3660 "Wrong NestMembers attribute length in class file %s", CHECK);
3661 }
3662 }
3663
3664 if (parsed_record_attribute) {
3665 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
3666 cfs,
3667 cp,
3668 record_attribute_start,
3669 CHECK);
3670 if (_need_verify) {
3671 guarantee_property(record_attribute_length == calculated_attr_length,
3672 "Record attribute has wrong length in class file %s",
3673 CHECK);
3674 }
3675 }
3676
3677 if (parsed_permitted_subclasses_attribute) {
3678 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3679 cfs,
3680 permitted_subclasses_attribute_start,
3681 CHECK);
3682 if (_need_verify) {
3683 guarantee_property(
3684 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3685 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3686 }
3687 }
3688
3689 if (_max_bootstrap_specifier_index >= 0) {
3690 guarantee_property(parsed_bootstrap_methods_attribute,
3691 "Missing BootstrapMethods attribute in class file %s", CHECK);
3692 }
3693 }
3694
3695 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3696 assert(k != nullptr, "invariant");
3697
3698 if (_synthetic_flag)
3699 k->set_is_synthetic();
3700 if (_sourcefile_index != 0) {
3701 k->set_source_file_name_index(_sourcefile_index);
3702 }
3703 if (_generic_signature_index != 0) {
3704 k->set_generic_signature_index(_generic_signature_index);
3705 }
3706 if (_sde_buffer != nullptr) {
3707 k->set_source_debug_extension(_sde_buffer, _sde_length);
3708 }
3709 }
3710
3711 // Create the Annotations object that will
3712 // hold the annotations array for the Klass.
3713 void ClassFileParser::create_combined_annotations(TRAPS) {
3714 if (_class_annotations == nullptr &&
3715 _class_type_annotations == nullptr &&
3716 _fields_annotations == nullptr &&
3717 _fields_type_annotations == nullptr) {
3718 // Don't create the Annotations object unnecessarily.
3719 return;
3720 }
3721
3722 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3723 annotations->set_class_annotations(_class_annotations);
3724 annotations->set_class_type_annotations(_class_type_annotations);
3725 annotations->set_fields_annotations(_fields_annotations);
3726 annotations->set_fields_type_annotations(_fields_type_annotations);
3727
3728 // This is the Annotations object that will be
3729 // assigned to InstanceKlass being constructed.
3730 _combined_annotations = annotations;
3731
3732 // The annotations arrays below has been transferred the
3733 // _combined_annotations so these fields can now be cleared.
3734 _class_annotations = nullptr;
3735 _class_type_annotations = nullptr;
3736 _fields_annotations = nullptr;
3737 _fields_type_annotations = nullptr;
3738 }
3739
3740 // Transfer ownership of metadata allocated to the InstanceKlass.
3741 void ClassFileParser::apply_parsed_class_metadata(
3742 InstanceKlass* this_klass,
3743 int java_fields_count) {
3744 assert(this_klass != nullptr, "invariant");
3745
3746 _cp->set_pool_holder(this_klass);
3747 this_klass->set_constants(_cp);
3748 this_klass->set_fieldinfo_stream(_fieldinfo_stream);
3749 this_klass->set_fields_status(_fields_status);
3750 this_klass->set_methods(_methods);
3751 this_klass->set_inner_classes(_inner_classes);
3752 this_klass->set_nest_members(_nest_members);
3753 this_klass->set_nest_host_index(_nest_host);
3754 this_klass->set_annotations(_combined_annotations);
3755 this_klass->set_permitted_subclasses(_permitted_subclasses);
3756 this_klass->set_record_components(_record_components);
3757 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3758 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3759 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3760 // its _super. If an OOM occurs while loading the current klass, its _super field
3761 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3762 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3763 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3764
3765 // Clear out these fields so they don't get deallocated by the destructor
3766 clear_class_metadata();
3767 }
3768
3769 AnnotationArray* ClassFileParser::allocate_annotations(const u1* const anno,
3770 int anno_length,
3771 TRAPS) {
3772 AnnotationArray* annotations = nullptr;
3773 if (anno != nullptr) {
3774 annotations = MetadataFactory::new_array<u1>(_loader_data,
3775 anno_length,
3776 CHECK_(annotations));
3777 for (int i = 0; i < anno_length; i++) {
3778 annotations->at_put(i, anno[i]);
3779 }
3780 }
3781 return annotations;
3782 }
3783
3784 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3785 const int super_class_index,
3786 const bool need_verify,
3787 TRAPS) {
3788 assert(cp != nullptr, "invariant");
3789 const InstanceKlass* super_klass = nullptr;
3790
3791 if (super_class_index == 0) {
3792 check_property(_class_name == vmSymbols::java_lang_Object(),
3793 "Invalid superclass index %u in class file %s",
3794 super_class_index,
3795 CHECK_NULL);
3796 } else {
3797 check_property(valid_klass_reference_at(super_class_index),
3798 "Invalid superclass index %u in class file %s",
3799 super_class_index,
3800 CHECK_NULL);
3801 // The class name should be legal because it is checked when parsing constant pool.
3802 // However, make sure it is not an array type.
3803 bool is_array = false;
3804 if (cp->tag_at(super_class_index).is_klass()) {
3805 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3806 if (need_verify)
3807 is_array = super_klass->is_array_klass();
3808 } else if (need_verify) {
3809 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3810 }
3811 if (need_verify) {
3812 guarantee_property(!is_array,
3813 "Bad superclass name in class file %s", CHECK_NULL);
3814 }
3815 }
3816 return super_klass;
3817 }
3818
3819 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
3820 _max_nonstatic_oop_maps = max_blocks;
3821 _nonstatic_oop_map_count = 0;
3822 if (max_blocks == 0) {
3823 _nonstatic_oop_maps = nullptr;
3824 } else {
3825 _nonstatic_oop_maps =
3826 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
3827 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3828 }
3829 }
3830
3831 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
3832 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
3833 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
3834 }
3835
3836 // addition of super oop maps
3837 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3838 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
3839 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
3840
3841 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3842 _nonstatic_oop_map_count += nof_blocks;
3843 }
3844
3845 // collection of oops
3846 void OopMapBlocksBuilder::add(int offset, int count) {
3847 if (_nonstatic_oop_map_count == 0) {
3848 _nonstatic_oop_map_count++;
3849 }
3850 OopMapBlock* nonstatic_oop_map = last_oop_map();
3851 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3852 nonstatic_oop_map->set_offset(offset);
3853 nonstatic_oop_map->set_count(count);
3854 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3855 nonstatic_oop_map->increment_count(count);
3856 } else { // Need a new one...
3857 _nonstatic_oop_map_count++;
3858 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
3859 nonstatic_oop_map = last_oop_map();
3860 nonstatic_oop_map->set_offset(offset);
3861 nonstatic_oop_map->set_count(count);
3862 }
3863 }
3864
3865 // general purpose copy, e.g. into allocated instanceKlass
3866 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
3867 if (_nonstatic_oop_map_count != 0) {
3868 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
3869 }
3870 }
3871
3872 // Sort and compact adjacent blocks
3873 void OopMapBlocksBuilder::compact() {
3874 if (_nonstatic_oop_map_count <= 1) {
3875 return;
3876 }
3877 /*
3878 * Since field layout sneaks in oops before values, we will be able to condense
3879 * blocks. There is potential to compact between super, own refs and values
3880 * containing refs.
3881 *
3882 * Currently compaction is slightly limited due to values being 8 byte aligned.
3883 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
3884 * and maybe it doesn't need to be.
3885 */
3886 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
3887 (_sort_Fn)OopMapBlock::compare_offset);
3888 if (_nonstatic_oop_map_count < 2) {
3889 return;
3890 }
3891
3892 // Make a temp copy, and iterate through and copy back into the original
3893 ResourceMark rm;
3894 OopMapBlock* oop_maps_copy =
3895 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
3896 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
3897 copy(oop_maps_copy);
3898 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
3899 unsigned int new_count = 1;
3900 oop_maps_copy++;
3901 while(oop_maps_copy < oop_maps_copy_end) {
3902 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3903 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3904 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3905 } else {
3906 nonstatic_oop_map++;
3907 new_count++;
3908 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3909 nonstatic_oop_map->set_count(oop_maps_copy->count());
3910 }
3911 oop_maps_copy++;
3912 }
3913 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
3914 _nonstatic_oop_map_count = new_count;
3915 }
3916
3917 void OopMapBlocksBuilder::print_on(outputStream* st) const {
3918 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
3919 if (_nonstatic_oop_map_count > 0) {
3920 OopMapBlock* map = _nonstatic_oop_maps;
3921 OopMapBlock* last_map = last_oop_map();
3922 assert(map <= last_map, "Last less than first");
3923 while (map <= last_map) {
3924 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3925 map->offset() + map->offset_span() - heapOopSize, map->count());
3926 map++;
3927 }
3928 }
3929 }
3930
3931 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
3932 print_on(st);
3933 }
3934
3935 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
3936 assert(ik != nullptr, "invariant");
3937
3938 const InstanceKlass* const super = ik->java_super();
3939
3940 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3941 // in which case we don't have to register objects as finalizable
3942 if (!_has_empty_finalizer) {
3943 if (_has_finalizer ||
3944 (super != nullptr && super->has_finalizer())) {
3945 ik->set_has_finalizer();
3946 }
3947 }
3948
3949 #ifdef ASSERT
3950 bool f = false;
3951 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
3952 vmSymbols::void_method_signature());
3953 if (InstanceKlass::is_finalization_enabled() &&
3954 (m != nullptr) && !m->is_empty_method()) {
3955 f = true;
3956 }
3957
3958 // Spec doesn't prevent agent from redefinition of empty finalizer.
3959 // Despite the fact that it's generally bad idea and redefined finalizer
3960 // will not work as expected we shouldn't abort vm in this case
3961 if (!ik->has_redefined_this_or_super()) {
3962 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
3963 }
3964 #endif
3965
3966 // Check if this klass supports the java.lang.Cloneable interface
3967 if (vmClasses::Cloneable_klass_loaded()) {
3968 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
3969 ik->set_is_cloneable();
3970 }
3971 }
3972
3973 // If it cannot be fast-path allocated, set a bit in the layout helper.
3974 // See documentation of InstanceKlass::can_be_fastpath_allocated().
3975 assert(ik->size_helper() > 0, "layout_helper is initialized");
3976 if (ik->is_abstract() || ik->is_interface()
3977 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == nullptr)
3978 || ik->size_helper() >= FastAllocateSizeLimit) {
3979 // Forbid fast-path allocation.
3980 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
3981 ik->set_layout_helper(lh);
3982 }
3983 }
3984
3985 // utility methods for appending an array with check for duplicates
3986
3987 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
3988 const Array<InstanceKlass*>* const ifs) {
3989 // iterate over new interfaces
3990 for (int i = 0; i < ifs->length(); i++) {
3991 InstanceKlass* const e = ifs->at(i);
3992 assert(e->is_klass() && e->is_interface(), "just checking");
3993 // add new interface
3994 result->append_if_missing(e);
3995 }
3996 }
3997
3998 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
3999 Array<InstanceKlass*>* local_ifs,
4000 ClassLoaderData* loader_data,
4001 TRAPS) {
4002 assert(local_ifs != nullptr, "invariant");
4003 assert(loader_data != nullptr, "invariant");
4004
4005 // Compute maximum size for transitive interfaces
4006 int max_transitive_size = 0;
4007 int super_size = 0;
4008 // Add superclass transitive interfaces size
4009 if (super != nullptr) {
4010 super_size = super->transitive_interfaces()->length();
4011 max_transitive_size += super_size;
4012 }
4013 // Add local interfaces' super interfaces
4014 const int local_size = local_ifs->length();
4015 for (int i = 0; i < local_size; i++) {
4016 InstanceKlass* const l = local_ifs->at(i);
4017 max_transitive_size += l->transitive_interfaces()->length();
4018 }
4019 // Finally add local interfaces
4020 max_transitive_size += local_size;
4021 // Construct array
4022 if (max_transitive_size == 0) {
4023 // no interfaces, use canonicalized array
4024 return Universe::the_empty_instance_klass_array();
4025 } else if (max_transitive_size == super_size) {
4026 // no new local interfaces added, share superklass' transitive interface array
4027 return super->transitive_interfaces();
4028 } else if (max_transitive_size == local_size) {
4029 // only local interfaces added, share local interface array
4030 return local_ifs;
4031 } else {
4032 ResourceMark rm;
4033 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4034
4035 // Copy down from superclass
4036 if (super != nullptr) {
4037 append_interfaces(result, super->transitive_interfaces());
4038 }
4039
4040 // Copy down from local interfaces' superinterfaces
4041 for (int i = 0; i < local_size; i++) {
4042 InstanceKlass* const l = local_ifs->at(i);
4043 append_interfaces(result, l->transitive_interfaces());
4044 }
4045 // Finally add local interfaces
4046 append_interfaces(result, local_ifs);
4047
4048 // length will be less than the max_transitive_size if duplicates were removed
4049 const int length = result->length();
4050 assert(length <= max_transitive_size, "just checking");
4051 Array<InstanceKlass*>* const new_result =
4052 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4053 for (int i = 0; i < length; i++) {
4054 InstanceKlass* const e = result->at(i);
4055 assert(e != nullptr, "just checking");
4056 new_result->at_put(i, e);
4057 }
4058 return new_result;
4059 }
4060 }
4061
4062 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4063 assert(this_klass != nullptr, "invariant");
4064 const Klass* const super = this_klass->super();
4065
4066 if (super != nullptr) {
4067 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4068
4069 if (super->is_final()) {
4070 classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4071 return;
4072 }
4073
4074 if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4075 classfile_icce_error("class %s cannot inherit from sealed class %s", super_ik, THREAD);
4076 return;
4077 }
4078
4079 // If the loader is not the boot loader then throw an exception if its
4080 // superclass is in package jdk.internal.reflect and its loader is not a
4081 // special reflection class loader
4082 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4083 PackageEntry* super_package = super->package();
4084 if (super_package != nullptr &&
4085 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4086 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4087 ResourceMark rm(THREAD);
4088 Exceptions::fthrow(
4089 THREAD_AND_LOCATION,
4090 vmSymbols::java_lang_IllegalAccessError(),
4091 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4092 this_klass->external_name(),
4093 this_klass->class_loader_data()->loader_name_and_id(),
4094 super->external_name());
4095 return;
4096 }
4097 }
4098
4099 Reflection::VerifyClassAccessResults vca_result =
4100 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4101 if (vca_result != Reflection::ACCESS_OK) {
4102 ResourceMark rm(THREAD);
4103 char* msg = Reflection::verify_class_access_msg(this_klass,
4104 InstanceKlass::cast(super),
4105 vca_result);
4106 if (msg == nullptr) {
4107 bool same_module = (this_klass->module() == super->module());
4108 Exceptions::fthrow(
4109 THREAD_AND_LOCATION,
4110 vmSymbols::java_lang_IllegalAccessError(),
4111 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4112 this_klass->external_name(),
4113 super->is_abstract() ? "abstract " : "",
4114 super->external_name(),
4115 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4116 (same_module) ? "" : "; ",
4117 (same_module) ? "" : super->class_in_module_of_loader());
4118 } else {
4119 // Add additional message content.
4120 Exceptions::fthrow(
4121 THREAD_AND_LOCATION,
4122 vmSymbols::java_lang_IllegalAccessError(),
4123 "superclass access check failed: %s",
4124 msg);
4125 }
4126 }
4127 }
4128 }
4129
4130
4131 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4132 assert(this_klass != nullptr, "invariant");
4133 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4134 const int lng = local_interfaces->length();
4135 for (int i = lng - 1; i >= 0; i--) {
4136 InstanceKlass* const k = local_interfaces->at(i);
4137 assert (k != nullptr && k->is_interface(), "invalid interface");
4138
4139 if (k->is_sealed() && !k->has_as_permitted_subclass(this_klass)) {
4140 classfile_icce_error(this_klass->is_interface() ?
4141 "class %s cannot extend sealed interface %s" :
4142 "class %s cannot implement sealed interface %s",
4143 k, THREAD);
4144 return;
4145 }
4146
4147 Reflection::VerifyClassAccessResults vca_result =
4148 Reflection::verify_class_access(this_klass, k, false);
4149 if (vca_result != Reflection::ACCESS_OK) {
4150 ResourceMark rm(THREAD);
4151 char* msg = Reflection::verify_class_access_msg(this_klass,
4152 k,
4153 vca_result);
4154 if (msg == nullptr) {
4155 bool same_module = (this_klass->module() == k->module());
4156 Exceptions::fthrow(
4157 THREAD_AND_LOCATION,
4158 vmSymbols::java_lang_IllegalAccessError(),
4159 "class %s cannot access its superinterface %s (%s%s%s)",
4160 this_klass->external_name(),
4161 k->external_name(),
4162 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4163 (same_module) ? "" : "; ",
4164 (same_module) ? "" : k->class_in_module_of_loader());
4165 return;
4166 } else {
4167 // Add additional message content.
4168 Exceptions::fthrow(
4169 THREAD_AND_LOCATION,
4170 vmSymbols::java_lang_IllegalAccessError(),
4171 "superinterface check failed: %s",
4172 msg);
4173 return;
4174 }
4175 }
4176 }
4177 }
4178
4179
4180 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4181 assert(this_klass != nullptr, "invariant");
4182 const Array<Method*>* const methods = this_klass->methods();
4183 const int num_methods = methods->length();
4184
4185 // go thru each method and check if it overrides a final method
4186 for (int index = 0; index < num_methods; index++) {
4187 const Method* const m = methods->at(index);
4188
4189 // skip private, static, and <init> methods
4190 if ((!m->is_private() && !m->is_static()) &&
4191 (m->name() != vmSymbols::object_initializer_name())) {
4192
4193 const Symbol* const name = m->name();
4194 const Symbol* const signature = m->signature();
4195 const InstanceKlass* k = this_klass->java_super();
4196 const Method* super_m = nullptr;
4197 while (k != nullptr) {
4198 // skip supers that don't have final methods.
4199 if (k->has_final_method()) {
4200 // lookup a matching method in the super class hierarchy
4201 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4202 if (super_m == nullptr) {
4203 break; // didn't find any match; get out
4204 }
4205
4206 if (super_m->is_final() && !super_m->is_static() &&
4207 !super_m->access_flags().is_private()) {
4208 // matching method in super is final, and not static or private
4209 bool can_access = Reflection::verify_member_access(this_klass,
4210 super_m->method_holder(),
4211 super_m->method_holder(),
4212 super_m->access_flags(),
4213 false, false, CHECK);
4214 if (can_access) {
4215 // this class can access super final method and therefore override
4216 ResourceMark rm(THREAD);
4217 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4218 err_msg("class %s overrides final method %s.%s%s",
4219 this_klass->external_name(),
4220 super_m->method_holder()->external_name(),
4221 name->as_C_string(),
4222 signature->as_C_string()));
4223 }
4224 }
4225
4226 // continue to look from super_m's holder's super.
4227 k = super_m->method_holder()->java_super();
4228 continue;
4229 }
4230
4231 k = k->java_super();
4232 }
4233 }
4234 }
4235 }
4236
4237
4238 // assumes that this_klass is an interface
4239 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4240 assert(this_klass != nullptr, "invariant");
4241 assert(this_klass->is_interface(), "not an interface");
4242 const Array<Method*>* methods = this_klass->methods();
4243 const int num_methods = methods->length();
4244
4245 for (int index = 0; index < num_methods; index++) {
4246 const Method* const m = methods->at(index);
4247 // if m is static and not the init method, throw a verify error
4248 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4249 ResourceMark rm(THREAD);
4250 Exceptions::fthrow(
4251 THREAD_AND_LOCATION,
4252 vmSymbols::java_lang_VerifyError(),
4253 "Illegal static method %s in interface %s",
4254 m->name()->as_C_string(),
4255 this_klass->external_name()
4256 );
4257 return;
4258 }
4259 }
4260 }
4261
4262 // utility methods for format checking
4263
4264 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4265 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4266 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4267 if (is_module) {
4268 ResourceMark rm(THREAD);
4269 Exceptions::fthrow(
4270 THREAD_AND_LOCATION,
4271 vmSymbols::java_lang_NoClassDefFoundError(),
4272 "%s is not a class because access_flag ACC_MODULE is set",
4273 _class_name->as_C_string());
4274 return;
4275 }
4276
4277 if (!_need_verify) { return; }
4278
4279 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4280 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4281 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4282 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4283 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4284 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4285 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4286
4287 if ((is_abstract && is_final) ||
4288 (is_interface && !is_abstract) ||
4289 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4290 (!is_interface && major_gte_1_5 && is_annotation)) {
4291 ResourceMark rm(THREAD);
4292 Exceptions::fthrow(
4293 THREAD_AND_LOCATION,
4294 vmSymbols::java_lang_ClassFormatError(),
4295 "Illegal class modifiers in class %s: 0x%X",
4296 _class_name->as_C_string(), flags
4297 );
4298 return;
4299 }
4300 }
4301
4302 static bool has_illegal_visibility(jint flags) {
4303 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4304 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4305 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4306
4307 return ((is_public && is_protected) ||
4308 (is_public && is_private) ||
4309 (is_protected && is_private));
4310 }
4311
4312 // A legal major_version.minor_version must be one of the following:
4313 //
4314 // Major_version >= 45 and major_version < 56, any minor_version.
4315 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4316 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4317 //
4318 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4319 ResourceMark rm(THREAD);
4320 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4321 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4322 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4323 class_name, major, minor, THREAD);
4324 return;
4325 }
4326
4327 if (major > max_version) {
4328 Exceptions::fthrow(
4329 THREAD_AND_LOCATION,
4330 vmSymbols::java_lang_UnsupportedClassVersionError(),
4331 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4332 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4333 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4334 return;
4335 }
4336
4337 if (major < JAVA_12_VERSION || minor == 0) {
4338 return;
4339 }
4340
4341 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4342 if (major != max_version) {
4343 Exceptions::fthrow(
4344 THREAD_AND_LOCATION,
4345 vmSymbols::java_lang_UnsupportedClassVersionError(),
4346 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4347 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4348 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4349 return;
4350 }
4351
4352 if (!Arguments::enable_preview()) {
4353 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4354 class_name, major, minor, THREAD);
4355 return;
4356 }
4357
4358 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4359 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4360 class_name, major, minor, THREAD);
4361 }
4362 }
4363
4364 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4365 bool is_interface,
4366 TRAPS) const {
4367 if (!_need_verify) { return; }
4368
4369 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4370 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4371 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4372 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4373 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4374 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4375 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4376 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4377 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4378
4379 bool is_illegal = false;
4380
4381 if (is_interface) {
4382 if (!is_public || !is_static || !is_final || is_private ||
4383 is_protected || is_volatile || is_transient ||
4384 (major_gte_1_5 && is_enum)) {
4385 is_illegal = true;
4386 }
4387 } else { // not interface
4388 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4389 is_illegal = true;
4390 }
4391 }
4392
4393 if (is_illegal) {
4394 ResourceMark rm(THREAD);
4395 Exceptions::fthrow(
4396 THREAD_AND_LOCATION,
4397 vmSymbols::java_lang_ClassFormatError(),
4398 "Illegal field modifiers in class %s: 0x%X",
4399 _class_name->as_C_string(), flags);
4400 return;
4401 }
4402 }
4403
4404 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4405 bool is_interface,
4406 const Symbol* name,
4407 TRAPS) const {
4408 if (!_need_verify) { return; }
4409
4410 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4411 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4412 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4413 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4414 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4415 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4416 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4417 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4418 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4419 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4420 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4421 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4422 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4423 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4424
4425 bool is_illegal = false;
4426
4427 if (is_interface) {
4428 if (major_gte_8) {
4429 // Class file version is JAVA_8_VERSION or later Methods of
4430 // interfaces may set any of the flags except ACC_PROTECTED,
4431 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4432 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4433 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4434 (is_native || is_protected || is_final || is_synchronized) ||
4435 // If a specific method of a class or interface has its
4436 // ACC_ABSTRACT flag set, it must not have any of its
4437 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4438 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4439 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4440 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4441 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4442 is_illegal = true;
4443 }
4444 } else if (major_gte_1_5) {
4445 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4446 if (!is_public || is_private || is_protected || is_static || is_final ||
4447 is_synchronized || is_native || !is_abstract || is_strict) {
4448 is_illegal = true;
4449 }
4450 } else {
4451 // Class file version is pre-JAVA_1_5_VERSION
4452 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4453 is_illegal = true;
4454 }
4455 }
4456 } else { // not interface
4457 if (has_illegal_visibility(flags)) {
4458 is_illegal = true;
4459 } else {
4460 if (is_initializer) {
4461 if (is_static || is_final || is_synchronized || is_native ||
4462 is_abstract || (major_gte_1_5 && is_bridge)) {
4463 is_illegal = true;
4464 }
4465 } else { // not initializer
4466 if (is_abstract) {
4467 if ((is_final || is_native || is_private || is_static ||
4468 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4469 is_illegal = true;
4470 }
4471 }
4472 }
4473 }
4474 }
4475
4476 if (is_illegal) {
4477 ResourceMark rm(THREAD);
4478 Exceptions::fthrow(
4479 THREAD_AND_LOCATION,
4480 vmSymbols::java_lang_ClassFormatError(),
4481 "Method %s in class %s has illegal modifiers: 0x%X",
4482 name->as_C_string(), _class_name->as_C_string(), flags);
4483 return;
4484 }
4485 }
4486
4487 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4488 int length,
4489 TRAPS) const {
4490 assert(_need_verify, "only called when _need_verify is true");
4491 // Note: 0 <= length < 64K, as it comes from a u2 entry in the CP.
4492 if (!UTF8::is_legal_utf8(buffer, static_cast<size_t>(length), _major_version <= 47)) {
4493 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4494 }
4495 }
4496
4497 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4498 // In class names, '/' separates unqualified names. This is verified in this function also.
4499 // Method names also may not contain the characters '<' or '>', unless <init>
4500 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4501 // method. Because these names have been checked as special cases before
4502 // calling this method in verify_legal_method_name.
4503 //
4504 // This method is also called from the modular system APIs in modules.cpp
4505 // to verify the validity of module and package names.
4506 bool ClassFileParser::verify_unqualified_name(const char* name,
4507 unsigned int length,
4508 int type) {
4509 if (length == 0) return false; // Must have at least one char.
4510 for (const char* p = name; p != name + length; p++) {
4511 switch(*p) {
4512 case JVM_SIGNATURE_DOT:
4513 case JVM_SIGNATURE_ENDCLASS:
4514 case JVM_SIGNATURE_ARRAY:
4515 // do not permit '.', ';', or '['
4516 return false;
4517 case JVM_SIGNATURE_SLASH:
4518 // check for '//' or leading or trailing '/' which are not legal
4519 // unqualified name must not be empty
4520 if (type == ClassFileParser::LegalClass) {
4521 if (p == name || p+1 >= name+length ||
4522 *(p+1) == JVM_SIGNATURE_SLASH) {
4523 return false;
4524 }
4525 } else {
4526 return false; // do not permit '/' unless it's class name
4527 }
4528 break;
4529 case JVM_SIGNATURE_SPECIAL:
4530 case JVM_SIGNATURE_ENDSPECIAL:
4531 // do not permit '<' or '>' in method names
4532 if (type == ClassFileParser::LegalMethod) {
4533 return false;
4534 }
4535 }
4536 }
4537 return true;
4538 }
4539
4540 // Take pointer to a UTF8 byte string (not NUL-terminated).
4541 // Skip over the longest part of the string that could
4542 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
4543 // Return a pointer to just past the fieldname.
4544 // Return null if no fieldname at all was found, or in the case of slash_ok
4545 // being true, we saw consecutive slashes (meaning we were looking for a
4546 // qualified path but found something that was badly-formed).
4547 static const char* skip_over_field_name(const char* const name,
4548 bool slash_ok,
4549 unsigned int length) {
4550 const char* p;
4551 jboolean last_is_slash = false;
4552 jboolean not_first_ch = false;
4553
4554 for (p = name; p != name + length; not_first_ch = true) {
4555 const char* old_p = p;
4556 jchar ch = *p;
4557 if (ch < 128) {
4558 p++;
4559 // quick check for ascii
4560 if ((ch >= 'a' && ch <= 'z') ||
4561 (ch >= 'A' && ch <= 'Z') ||
4562 (ch == '_' || ch == '$') ||
4563 (not_first_ch && ch >= '0' && ch <= '9')) {
4564 last_is_slash = false;
4565 continue;
4566 }
4567 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
4568 if (last_is_slash) {
4569 return nullptr; // Don't permit consecutive slashes
4570 }
4571 last_is_slash = true;
4572 continue;
4573 }
4574 }
4575 else {
4576 jint unicode_ch;
4577 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4578 p = tmp_p;
4579 last_is_slash = false;
4580 // Check if ch is Java identifier start or is Java identifier part
4581 // 4672820: call java.lang.Character methods directly without generating separate tables.
4582 EXCEPTION_MARK;
4583 // return value
4584 JavaValue result(T_BOOLEAN);
4585 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
4586 JavaCallArguments args;
4587 args.push_int(unicode_ch);
4588
4589 if (not_first_ch) {
4590 // public static boolean isJavaIdentifierPart(char ch);
4591 JavaCalls::call_static(&result,
4592 vmClasses::Character_klass(),
4593 vmSymbols::isJavaIdentifierPart_name(),
4594 vmSymbols::int_bool_signature(),
4595 &args,
4596 THREAD);
4597 } else {
4598 // public static boolean isJavaIdentifierStart(char ch);
4599 JavaCalls::call_static(&result,
4600 vmClasses::Character_klass(),
4601 vmSymbols::isJavaIdentifierStart_name(),
4602 vmSymbols::int_bool_signature(),
4603 &args,
4604 THREAD);
4605 }
4606 if (HAS_PENDING_EXCEPTION) {
4607 CLEAR_PENDING_EXCEPTION;
4608 return nullptr;
4609 }
4610 if(result.get_jboolean()) {
4611 continue;
4612 }
4613 }
4614 return (not_first_ch) ? old_p : nullptr;
4615 }
4616 return (not_first_ch && !last_is_slash) ? p : nullptr;
4617 }
4618
4619 // Take pointer to a UTF8 byte string (not NUL-terminated).
4620 // Skip over the longest part of the string that could
4621 // be taken as a field signature. Allow "void" if void_ok.
4622 // Return a pointer to just past the signature.
4623 // Return null if no legal signature is found.
4624 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4625 bool void_ok,
4626 unsigned int length,
4627 TRAPS) const {
4628 unsigned int array_dim = 0;
4629 while (length > 0) {
4630 switch (signature[0]) {
4631 case JVM_SIGNATURE_VOID: if (!void_ok) { return nullptr; }
4632 case JVM_SIGNATURE_BOOLEAN:
4633 case JVM_SIGNATURE_BYTE:
4634 case JVM_SIGNATURE_CHAR:
4635 case JVM_SIGNATURE_SHORT:
4636 case JVM_SIGNATURE_INT:
4637 case JVM_SIGNATURE_FLOAT:
4638 case JVM_SIGNATURE_LONG:
4639 case JVM_SIGNATURE_DOUBLE:
4640 return signature + 1;
4641 case JVM_SIGNATURE_CLASS: {
4642 if (_major_version < JAVA_1_5_VERSION) {
4643 // Skip over the class name if one is there
4644 const char* const p = skip_over_field_name(signature + 1, true, --length);
4645
4646 // The next character better be a semicolon
4647 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
4648 return p + 1;
4649 }
4650 }
4651 else {
4652 // Skip leading 'L' and ignore first appearance of ';'
4653 signature++;
4654 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4655 // Format check signature
4656 if (c != nullptr) {
4657 int newlen = pointer_delta_as_int(c, (char*) signature);
4658 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4659 if (!legal) {
4660 classfile_parse_error("Class name is empty or contains illegal character "
4661 "in descriptor in class file %s",
4662 THREAD);
4663 return nullptr;
4664 }
4665 return signature + newlen + 1;
4666 }
4667 }
4668 return nullptr;
4669 }
4670 case JVM_SIGNATURE_ARRAY:
4671 array_dim++;
4672 if (array_dim > 255) {
4673 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4674 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
4675 return nullptr;
4676 }
4677 // The rest of what's there better be a legal signature
4678 signature++;
4679 length--;
4680 void_ok = false;
4681 break;
4682 default:
4683 return nullptr;
4684 }
4685 }
4686 return nullptr;
4687 }
4688
4689 // Checks if name is a legal class name.
4690 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4691 if (!_need_verify || _relax_verify) { return; }
4692
4693 assert(name->refcount() > 0, "symbol must be kept alive");
4694 char* bytes = (char*)name->bytes();
4695 unsigned int length = name->utf8_length();
4696 bool legal = false;
4697
4698 if (length > 0) {
4699 const char* p;
4700 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4701 p = skip_over_field_signature(bytes, false, length, CHECK);
4702 legal = (p != nullptr) && ((p - bytes) == (int)length);
4703 } else if (_major_version < JAVA_1_5_VERSION) {
4704 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4705 p = skip_over_field_name(bytes, true, length);
4706 legal = (p != nullptr) && ((p - bytes) == (int)length);
4707 }
4708 } else {
4709 // 4900761: relax the constraints based on JSR202 spec
4710 // Class names may be drawn from the entire Unicode character set.
4711 // Identifiers between '/' must be unqualified names.
4712 // The utf8 string has been verified when parsing cpool entries.
4713 legal = verify_unqualified_name(bytes, length, LegalClass);
4714 }
4715 }
4716 if (!legal) {
4717 ResourceMark rm(THREAD);
4718 assert(_class_name != nullptr, "invariant");
4719 Exceptions::fthrow(
4720 THREAD_AND_LOCATION,
4721 vmSymbols::java_lang_ClassFormatError(),
4722 "Illegal class name \"%.*s\" in class file %s", length, bytes,
4723 _class_name->as_C_string()
4724 );
4725 return;
4726 }
4727 }
4728
4729 // Checks if name is a legal field name.
4730 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4731 if (!_need_verify || _relax_verify) { return; }
4732
4733 char* bytes = (char*)name->bytes();
4734 unsigned int length = name->utf8_length();
4735 bool legal = false;
4736
4737 if (length > 0) {
4738 if (_major_version < JAVA_1_5_VERSION) {
4739 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4740 const char* p = skip_over_field_name(bytes, false, length);
4741 legal = (p != nullptr) && ((p - bytes) == (int)length);
4742 }
4743 } else {
4744 // 4881221: relax the constraints based on JSR202 spec
4745 legal = verify_unqualified_name(bytes, length, LegalField);
4746 }
4747 }
4748
4749 if (!legal) {
4750 ResourceMark rm(THREAD);
4751 assert(_class_name != nullptr, "invariant");
4752 Exceptions::fthrow(
4753 THREAD_AND_LOCATION,
4754 vmSymbols::java_lang_ClassFormatError(),
4755 "Illegal field name \"%.*s\" in class %s", length, bytes,
4756 _class_name->as_C_string()
4757 );
4758 return;
4759 }
4760 }
4761
4762 // Checks if name is a legal method name.
4763 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4764 if (!_need_verify || _relax_verify) { return; }
4765
4766 assert(name != nullptr, "method name is null");
4767 char* bytes = (char*)name->bytes();
4768 unsigned int length = name->utf8_length();
4769 bool legal = false;
4770
4771 if (length > 0) {
4772 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
4773 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4774 legal = true;
4775 }
4776 } else if (_major_version < JAVA_1_5_VERSION) {
4777 const char* p;
4778 p = skip_over_field_name(bytes, false, length);
4779 legal = (p != nullptr) && ((p - bytes) == (int)length);
4780 } else {
4781 // 4881221: relax the constraints based on JSR202 spec
4782 legal = verify_unqualified_name(bytes, length, LegalMethod);
4783 }
4784 }
4785
4786 if (!legal) {
4787 ResourceMark rm(THREAD);
4788 assert(_class_name != nullptr, "invariant");
4789 Exceptions::fthrow(
4790 THREAD_AND_LOCATION,
4791 vmSymbols::java_lang_ClassFormatError(),
4792 "Illegal method name \"%.*s\" in class %s", length, bytes,
4793 _class_name->as_C_string()
4794 );
4795 return;
4796 }
4797 }
4798
4799
4800 // Checks if signature is a legal field signature.
4801 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
4802 const Symbol* signature,
4803 TRAPS) const {
4804 if (!_need_verify) { return; }
4805
4806 const char* const bytes = (const char*)signature->bytes();
4807 const unsigned int length = signature->utf8_length();
4808 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
4809
4810 if (p == nullptr || (p - bytes) != (int)length) {
4811 throwIllegalSignature("Field", name, signature, CHECK);
4812 }
4813 }
4814
4815 // Check that the signature is compatible with the method name. For example,
4816 // check that <init> has a void signature.
4817 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
4818 const Symbol* signature,
4819 TRAPS) const {
4820 if (!_need_verify) {
4821 return;
4822 }
4823
4824 // Class initializers cannot have args for class format version >= 51.
4825 if (name == vmSymbols::class_initializer_name() &&
4826 signature != vmSymbols::void_method_signature() &&
4827 _major_version >= JAVA_7_VERSION) {
4828 throwIllegalSignature("Method", name, signature, THREAD);
4829 return;
4830 }
4831
4832 int sig_length = signature->utf8_length();
4833 if (name->utf8_length() > 0 &&
4834 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
4835 sig_length > 0 &&
4836 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
4837 throwIllegalSignature("Method", name, signature, THREAD);
4838 }
4839 }
4840
4841 // Checks if signature is a legal method signature.
4842 // Returns number of parameters
4843 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
4844 const Symbol* signature,
4845 TRAPS) const {
4846 if (!_need_verify) {
4847 // make sure caller's args_size will be less than 0 even for non-static
4848 // method so it will be recomputed in compute_size_of_parameters().
4849 return -2;
4850 }
4851
4852 unsigned int args_size = 0;
4853 const char* p = (const char*)signature->bytes();
4854 unsigned int length = signature->utf8_length();
4855 const char* nextp;
4856
4857 // The first character must be a '('
4858 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4859 length--;
4860 // Skip over legal field signatures
4861 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4862 while ((length > 0) && (nextp != nullptr)) {
4863 args_size++;
4864 if (p[0] == 'J' || p[0] == 'D') {
4865 args_size++;
4866 }
4867 length -= pointer_delta_as_int(nextp, p);
4868 p = nextp;
4869 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4870 }
4871 // The first non-signature thing better be a ')'
4872 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4873 length--;
4874 // Now we better just have a return value
4875 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4876 if (nextp && ((int)length == (nextp - p))) {
4877 return args_size;
4878 }
4879 }
4880 }
4881 // Report error
4882 throwIllegalSignature("Method", name, signature, THREAD);
4883 return 0;
4884 }
4885
4886 int ClassFileParser::static_field_size() const {
4887 assert(_field_info != nullptr, "invariant");
4888 return _field_info->_static_field_size;
4889 }
4890
4891 int ClassFileParser::total_oop_map_count() const {
4892 assert(_field_info != nullptr, "invariant");
4893 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
4894 }
4895
4896 jint ClassFileParser::layout_size() const {
4897 assert(_field_info != nullptr, "invariant");
4898 return _field_info->_instance_size;
4899 }
4900
4901 static void check_methods_for_intrinsics(const InstanceKlass* ik,
4902 const Array<Method*>* methods) {
4903 assert(ik != nullptr, "invariant");
4904 assert(methods != nullptr, "invariant");
4905
4906 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4907 // (We used to do this lazily, but now we query it in Rewriter,
4908 // which is eagerly done for every method, so we might as well do it now,
4909 // when everything is fresh in memory.)
4910 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
4911
4912 if (klass_id != vmSymbolID::NO_SID) {
4913 for (int j = 0; j < methods->length(); ++j) {
4914 Method* method = methods->at(j);
4915 method->init_intrinsic_id(klass_id);
4916
4917 if (CheckIntrinsics) {
4918 // Check if an intrinsic is defined for method 'method',
4919 // but the method is not annotated with @IntrinsicCandidate.
4920 if (method->intrinsic_id() != vmIntrinsics::_none &&
4921 !method->intrinsic_candidate()) {
4922 tty->print("Compiler intrinsic is defined for method [%s], "
4923 "but the method is not annotated with @IntrinsicCandidate.%s",
4924 method->name_and_sig_as_C_string(),
4925 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
4926 );
4927 tty->cr();
4928 DEBUG_ONLY(vm_exit(1));
4929 }
4930 // Check is the method 'method' is annotated with @IntrinsicCandidate,
4931 // but there is no intrinsic available for it.
4932 if (method->intrinsic_candidate() &&
4933 method->intrinsic_id() == vmIntrinsics::_none) {
4934 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
4935 "but no compiler intrinsic is defined for the method.%s",
4936 method->name_and_sig_as_C_string(),
4937 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4938 );
4939 tty->cr();
4940 DEBUG_ONLY(vm_exit(1));
4941 }
4942 }
4943 } // end for
4944
4945 #ifdef ASSERT
4946 if (CheckIntrinsics) {
4947 // Check for orphan methods in the current class. A method m
4948 // of a class C is orphan if an intrinsic is defined for method m,
4949 // but class C does not declare m.
4950 // The check is potentially expensive, therefore it is available
4951 // only in debug builds.
4952
4953 for (auto id : EnumRange<vmIntrinsicID>{}) {
4954 if (vmIntrinsics::_compiledLambdaForm == id) {
4955 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
4956 // generated for the JVM from a LambdaForm and therefore no method
4957 // is defined for it.
4958 continue;
4959 }
4960 if (vmIntrinsics::_blackhole == id) {
4961 // The _blackhole intrinsic is a special marker. No explicit method
4962 // is defined for it.
4963 continue;
4964 }
4965
4966 if (vmIntrinsics::class_for(id) == klass_id) {
4967 // Check if the current class contains a method with the same
4968 // name, flags, signature.
4969 bool match = false;
4970 for (int j = 0; j < methods->length(); ++j) {
4971 const Method* method = methods->at(j);
4972 if (method->intrinsic_id() == id) {
4973 match = true;
4974 break;
4975 }
4976 }
4977
4978 if (!match) {
4979 char buf[1000];
4980 tty->print("Compiler intrinsic is defined for method [%s], "
4981 "but the method is not available in class [%s].%s",
4982 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
4983 ik->name()->as_C_string(),
4984 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4985 );
4986 tty->cr();
4987 DEBUG_ONLY(vm_exit(1));
4988 }
4989 }
4990 } // end for
4991 } // CheckIntrinsics
4992 #endif // ASSERT
4993 }
4994 }
4995
4996 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
4997 const ClassInstanceInfo& cl_inst_info,
4998 TRAPS) {
4999 if (_klass != nullptr) {
5000 return _klass;
5001 }
5002
5003 InstanceKlass* const ik =
5004 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5005
5006 if (is_hidden()) {
5007 mangle_hidden_class_name(ik);
5008 }
5009
5010 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5011
5012 assert(_klass == ik, "invariant");
5013
5014 return ik;
5015 }
5016
5017 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5018 bool changed_by_loadhook,
5019 const ClassInstanceInfo& cl_inst_info,
5020 TRAPS) {
5021 assert(ik != nullptr, "invariant");
5022
5023 // Set name and CLD before adding to CLD
5024 ik->set_class_loader_data(_loader_data);
5025 ik->set_name(_class_name);
5026
5027 // Add all classes to our internal class loader list here,
5028 // including classes in the bootstrap (null) class loader.
5029 const bool publicize = !is_internal();
5030
5031 _loader_data->add_class(ik, publicize);
5032
5033 set_klass_to_deallocate(ik);
5034
5035 assert(_field_info != nullptr, "invariant");
5036 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5037 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5038 "sanity");
5039
5040 assert(ik->is_instance_klass(), "sanity");
5041 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5042
5043 // Fill in information already parsed
5044 ik->set_should_verify_class(_need_verify);
5045
5046 // Not yet: supers are done below to support the new subtype-checking fields
5047 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5048 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5049 ik->set_static_oop_field_count(_static_oop_count);
5050
5051 // this transfers ownership of a lot of arrays from
5052 // the parser onto the InstanceKlass*
5053 apply_parsed_class_metadata(ik, _java_fields_count);
5054
5055 // can only set dynamic nest-host after static nest information is set
5056 if (cl_inst_info.dynamic_nest_host() != nullptr) {
5057 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5058 }
5059
5060 // note that is not safe to use the fields in the parser from this point on
5061 assert(nullptr == _cp, "invariant");
5062 assert(nullptr == _fieldinfo_stream, "invariant");
5063 assert(nullptr == _fields_status, "invariant");
5064 assert(nullptr == _methods, "invariant");
5065 assert(nullptr == _inner_classes, "invariant");
5066 assert(nullptr == _nest_members, "invariant");
5067 assert(nullptr == _combined_annotations, "invariant");
5068 assert(nullptr == _record_components, "invariant");
5069 assert(nullptr == _permitted_subclasses, "invariant");
5070
5071 if (_has_localvariable_table) {
5072 ik->set_has_localvariable_table(true);
5073 }
5074
5075 if (_has_final_method) {
5076 ik->set_has_final_method();
5077 }
5078
5079 ik->copy_method_ordering(_method_ordering, CHECK);
5080 // The InstanceKlass::_methods_jmethod_ids cache
5081 // is managed on the assumption that the initial cache
5082 // size is equal to the number of methods in the class. If
5083 // that changes, then InstanceKlass::idnum_can_increment()
5084 // has to be changed accordingly.
5085 ik->set_initial_method_idnum(checked_cast<u2>(ik->methods()->length()));
5086
5087 ik->set_this_class_index(_this_class_index);
5088
5089 if (_is_hidden) {
5090 // _this_class_index is a CONSTANT_Class entry that refers to this
5091 // hidden class itself. If this class needs to refer to its own methods
5092 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5093 // _this_class_index. However, because this class is hidden (it's
5094 // not stored in SystemDictionary), _this_class_index cannot be resolved
5095 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5096 // Therefore, we must eagerly resolve _this_class_index now.
5097 ik->constants()->klass_at_put(_this_class_index, ik);
5098 }
5099
5100 ik->set_minor_version(_minor_version);
5101 ik->set_major_version(_major_version);
5102 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5103 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5104
5105 assert(!_is_hidden || ik->is_hidden(), "must be set already");
5106
5107 // Set PackageEntry for this_klass
5108 oop cl = ik->class_loader();
5109 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5110 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5111 ik->set_package(cld, nullptr, CHECK);
5112
5113 const Array<Method*>* const methods = ik->methods();
5114 assert(methods != nullptr, "invariant");
5115 const int methods_len = methods->length();
5116
5117 check_methods_for_intrinsics(ik, methods);
5118
5119 // Fill in field values obtained by parse_classfile_attributes
5120 if (_parsed_annotations->has_any_annotations()) {
5121 _parsed_annotations->apply_to(ik);
5122 }
5123
5124 apply_parsed_class_attributes(ik);
5125
5126 // Miranda methods
5127 if ((_num_miranda_methods > 0) ||
5128 // if this class introduced new miranda methods or
5129 (_super_klass != nullptr && _super_klass->has_miranda_methods())
5130 // super class exists and this class inherited miranda methods
5131 ) {
5132 ik->set_has_miranda_methods(); // then set a flag
5133 }
5134
5135 // Fill in information needed to compute superclasses.
5136 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5137 ik->set_transitive_interfaces(_transitive_interfaces);
5138 ik->set_local_interfaces(_local_interfaces);
5139 _transitive_interfaces = nullptr;
5140 _local_interfaces = nullptr;
5141
5142 // Initialize itable offset tables
5143 klassItable::setup_itable_offset_table(ik);
5144
5145 // Compute transitive closure of interfaces this class implements
5146 // Do final class setup
5147 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5148 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5149 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5150 }
5151
5152 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5153 ( _super_klass != nullptr && _super_klass->has_contended_annotations())) {
5154 ik->set_has_contended_annotations(true);
5155 }
5156
5157 // Fill in has_finalizer and layout_helper
5158 set_precomputed_flags(ik);
5159
5160 // check if this class can access its super class
5161 check_super_class_access(ik, CHECK);
5162
5163 // check if this class can access its superinterfaces
5164 check_super_interface_access(ik, CHECK);
5165
5166 // check if this class overrides any final method
5167 check_final_method_override(ik, CHECK);
5168
5169 // reject static interface methods prior to Java 8
5170 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5171 check_illegal_static_method(ik, CHECK);
5172 }
5173
5174 // Obtain this_klass' module entry
5175 ModuleEntry* module_entry = ik->module();
5176 assert(module_entry != nullptr, "module_entry should always be set");
5177
5178 // Obtain java.lang.Module
5179 Handle module_handle(THREAD, module_entry->module());
5180
5181 // Allocate mirror and initialize static fields
5182 // The create_mirror() call will also call compute_modifiers()
5183 java_lang_Class::create_mirror(ik,
5184 Handle(THREAD, _loader_data->class_loader()),
5185 module_handle,
5186 _protection_domain,
5187 cl_inst_info.class_data(),
5188 CHECK);
5189
5190 assert(_all_mirandas != nullptr, "invariant");
5191
5192 // Generate any default methods - default methods are public interface methods
5193 // that have a default implementation. This is new with Java 8.
5194 if (_has_nonstatic_concrete_methods) {
5195 DefaultMethods::generate_default_methods(ik,
5196 _all_mirandas,
5197 CHECK);
5198 }
5199
5200 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5201 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5202 !module_entry->has_default_read_edges()) {
5203 if (!module_entry->set_has_default_read_edges()) {
5204 // We won a potential race
5205 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5206 }
5207 }
5208
5209 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5210
5211 if (!is_internal()) {
5212 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5213
5214 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5215 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5216 log_is_enabled(Info, class, preview)) {
5217 ResourceMark rm;
5218 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5219 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5220 }
5221
5222 if (log_is_enabled(Debug, class, resolve)) {
5223 ResourceMark rm;
5224 // print out the superclass.
5225 const char * from = ik->external_name();
5226 if (ik->java_super() != nullptr) {
5227 log_debug(class, resolve)("%s %s (super)",
5228 from,
5229 ik->java_super()->external_name());
5230 }
5231 // print out each of the interface classes referred to by this class.
5232 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5233 if (local_interfaces != nullptr) {
5234 const int length = local_interfaces->length();
5235 for (int i = 0; i < length; i++) {
5236 const InstanceKlass* const k = local_interfaces->at(i);
5237 const char * to = k->external_name();
5238 log_debug(class, resolve)("%s %s (interface)", from, to);
5239 }
5240 }
5241 }
5242 }
5243
5244 JFR_ONLY(INIT_ID(ik);)
5245
5246 // If we reach here, all is well.
5247 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5248 // in order for it to not be destroyed in the ClassFileParser destructor.
5249 set_klass_to_deallocate(nullptr);
5250
5251 // it's official
5252 set_klass(ik);
5253
5254 debug_only(ik->verify();)
5255 }
5256
5257 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5258 // Decrement the refcount in the old name, since we're clobbering it.
5259 _class_name->decrement_refcount();
5260
5261 _class_name = new_class_name;
5262 // Increment the refcount of the new name.
5263 // Now the ClassFileParser owns this name and will decrement in
5264 // the destructor.
5265 _class_name->increment_refcount();
5266 }
5267
5268 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5269 bool trusted = loader_data->is_boot_class_loader_data() ||
5270 loader_data->is_platform_class_loader_data();
5271 bool need_verify =
5272 // verifyAll
5273 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5274 // verifyRemote
5275 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5276 return !need_verify;
5277 }
5278
5279 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5280 Symbol* name,
5281 ClassLoaderData* loader_data,
5282 const ClassLoadInfo* cl_info,
5283 Publicity pub_level,
5284 TRAPS) :
5285 _stream(stream),
5286 _class_name(nullptr),
5287 _loader_data(loader_data),
5288 _is_hidden(cl_info->is_hidden()),
5289 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5290 _orig_cp_size(0),
5291 _static_oop_count(0),
5292 _super_klass(),
5293 _cp(nullptr),
5294 _fieldinfo_stream(nullptr),
5295 _fields_status(nullptr),
5296 _methods(nullptr),
5297 _inner_classes(nullptr),
5298 _nest_members(nullptr),
5299 _nest_host(0),
5300 _permitted_subclasses(nullptr),
5301 _record_components(nullptr),
5302 _local_interfaces(nullptr),
5303 _transitive_interfaces(nullptr),
5304 _combined_annotations(nullptr),
5305 _class_annotations(nullptr),
5306 _class_type_annotations(nullptr),
5307 _fields_annotations(nullptr),
5308 _fields_type_annotations(nullptr),
5309 _klass(nullptr),
5310 _klass_to_deallocate(nullptr),
5311 _parsed_annotations(nullptr),
5312 _field_info(nullptr),
5313 _temp_field_info(nullptr),
5314 _method_ordering(nullptr),
5315 _all_mirandas(nullptr),
5316 _vtable_size(0),
5317 _itable_size(0),
5318 _num_miranda_methods(0),
5319 _protection_domain(cl_info->protection_domain()),
5320 _access_flags(),
5321 _pub_level(pub_level),
5322 _bad_constant_seen(0),
5323 _synthetic_flag(false),
5324 _sde_length(false),
5325 _sde_buffer(nullptr),
5326 _sourcefile_index(0),
5327 _generic_signature_index(0),
5328 _major_version(0),
5329 _minor_version(0),
5330 _this_class_index(0),
5331 _super_class_index(0),
5332 _itfs_len(0),
5333 _java_fields_count(0),
5334 _need_verify(false),
5335 _relax_verify(false),
5336 _has_nonstatic_concrete_methods(false),
5337 _declares_nonstatic_concrete_methods(false),
5338 _has_localvariable_table(false),
5339 _has_final_method(false),
5340 _has_contended_fields(false),
5341 _has_finalizer(false),
5342 _has_empty_finalizer(false),
5343 _max_bootstrap_specifier_index(-1) {
5344
5345 _class_name = name != nullptr ? name : vmSymbols::unknown_class_name();
5346 _class_name->increment_refcount();
5347
5348 assert(_loader_data != nullptr, "invariant");
5349 assert(stream != nullptr, "invariant");
5350 assert(_stream != nullptr, "invariant");
5351 assert(_stream->buffer() == _stream->current(), "invariant");
5352 assert(_class_name != nullptr, "invariant");
5353 assert(0 == _access_flags.as_int(), "invariant");
5354
5355 // Figure out whether we can skip format checking (matching classic VM behavior)
5356 if (CDSConfig::is_dumping_static_archive()) {
5357 // verify == true means it's a 'remote' class (i.e., non-boot class)
5358 // Verification decision is based on BytecodeVerificationRemote flag
5359 // for those classes.
5360 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5361 BytecodeVerificationLocal;
5362 }
5363 else {
5364 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5365 stream->need_verify());
5366 }
5367
5368 // synch back verification state to stream
5369 stream->set_verify(_need_verify);
5370
5371 // Check if verification needs to be relaxed for this class file
5372 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5373 _relax_verify = relax_format_check_for(_loader_data);
5374
5375 parse_stream(stream, CHECK);
5376
5377 post_process_parsed_stream(stream, _cp, CHECK);
5378 }
5379
5380 void ClassFileParser::clear_class_metadata() {
5381 // metadata created before the instance klass is created. Must be
5382 // deallocated if classfile parsing returns an error.
5383 _cp = nullptr;
5384 _fieldinfo_stream = nullptr;
5385 _fields_status = nullptr;
5386 _methods = nullptr;
5387 _inner_classes = nullptr;
5388 _nest_members = nullptr;
5389 _permitted_subclasses = nullptr;
5390 _combined_annotations = nullptr;
5391 _class_annotations = _class_type_annotations = nullptr;
5392 _fields_annotations = _fields_type_annotations = nullptr;
5393 _record_components = nullptr;
5394 }
5395
5396 // Destructor to clean up
5397 ClassFileParser::~ClassFileParser() {
5398 _class_name->decrement_refcount();
5399
5400 if (_cp != nullptr) {
5401 MetadataFactory::free_metadata(_loader_data, _cp);
5402 }
5403
5404 if (_fieldinfo_stream != nullptr) {
5405 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_stream);
5406 }
5407
5408 if (_fields_status != nullptr) {
5409 MetadataFactory::free_array<FieldStatus>(_loader_data, _fields_status);
5410 }
5411
5412 if (_methods != nullptr) {
5413 // Free methods
5414 InstanceKlass::deallocate_methods(_loader_data, _methods);
5415 }
5416
5417 // beware of the Universe::empty_blah_array!!
5418 if (_inner_classes != nullptr && _inner_classes != Universe::the_empty_short_array()) {
5419 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5420 }
5421
5422 if (_nest_members != nullptr && _nest_members != Universe::the_empty_short_array()) {
5423 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5424 }
5425
5426 if (_record_components != nullptr) {
5427 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5428 }
5429
5430 if (_permitted_subclasses != nullptr && _permitted_subclasses != Universe::the_empty_short_array()) {
5431 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5432 }
5433
5434 // Free interfaces
5435 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5436 _local_interfaces, _transitive_interfaces);
5437
5438 if (_combined_annotations != nullptr) {
5439 // After all annotations arrays have been created, they are installed into the
5440 // Annotations object that will be assigned to the InstanceKlass being created.
5441
5442 // Deallocate the Annotations object and the installed annotations arrays.
5443 _combined_annotations->deallocate_contents(_loader_data);
5444
5445 // If the _combined_annotations pointer is non-null,
5446 // then the other annotations fields should have been cleared.
5447 assert(_class_annotations == nullptr, "Should have been cleared");
5448 assert(_class_type_annotations == nullptr, "Should have been cleared");
5449 assert(_fields_annotations == nullptr, "Should have been cleared");
5450 assert(_fields_type_annotations == nullptr, "Should have been cleared");
5451 } else {
5452 // If the annotations arrays were not installed into the Annotations object,
5453 // then they have to be deallocated explicitly.
5454 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5455 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5456 Annotations::free_contents(_loader_data, _fields_annotations);
5457 Annotations::free_contents(_loader_data, _fields_type_annotations);
5458 }
5459
5460 clear_class_metadata();
5461 _transitive_interfaces = nullptr;
5462 _local_interfaces = nullptr;
5463
5464 // deallocate the klass if already created. Don't directly deallocate, but add
5465 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5466 // at a safepoint.
5467 if (_klass_to_deallocate != nullptr) {
5468 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5469 }
5470 }
5471
5472 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5473 TRAPS) {
5474
5475 assert(stream != nullptr, "invariant");
5476 assert(_class_name != nullptr, "invariant");
5477
5478 // BEGIN STREAM PARSING
5479 stream->guarantee_more(8, CHECK); // magic, major, minor
5480 // Magic value
5481 const u4 magic = stream->get_u4_fast();
5482 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5483 "Incompatible magic value %u in class file %s",
5484 magic, CHECK);
5485
5486 // Version numbers
5487 _minor_version = stream->get_u2_fast();
5488 _major_version = stream->get_u2_fast();
5489
5490 // Check version numbers - we check this even with verifier off
5491 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5492
5493 stream->guarantee_more(3, CHECK); // length, first cp tag
5494 u2 cp_size = stream->get_u2_fast();
5495
5496 guarantee_property(
5497 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5498 cp_size, CHECK);
5499
5500 _orig_cp_size = cp_size;
5501 if (is_hidden()) { // Add a slot for hidden class name.
5502 cp_size++;
5503 }
5504
5505 _cp = ConstantPool::allocate(_loader_data,
5506 cp_size,
5507 CHECK);
5508
5509 ConstantPool* const cp = _cp;
5510
5511 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
5512
5513 assert(cp_size == (u2)cp->length(), "invariant");
5514
5515 // ACCESS FLAGS
5516 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5517
5518 // Access flags
5519 jint flags;
5520 // JVM_ACC_MODULE is defined in JDK-9 and later.
5521 if (_major_version >= JAVA_9_VERSION) {
5522 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5523 } else {
5524 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5525 }
5526
5527 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5528 // Set abstract bit for old class files for backward compatibility
5529 flags |= JVM_ACC_ABSTRACT;
5530 }
5531
5532 verify_legal_class_modifiers(flags, CHECK);
5533
5534 short bad_constant = class_bad_constant_seen();
5535 if (bad_constant != 0) {
5536 // Do not throw CFE until after the access_flags are checked because if
5537 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5538 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5539 return;
5540 }
5541
5542 _access_flags.set_flags(flags);
5543
5544 // This class and superclass
5545 _this_class_index = stream->get_u2_fast();
5546 check_property(
5547 valid_cp_range(_this_class_index, cp_size) &&
5548 cp->tag_at(_this_class_index).is_unresolved_klass(),
5549 "Invalid this class index %u in constant pool in class file %s",
5550 _this_class_index, CHECK);
5551
5552 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5553 assert(class_name_in_cp != nullptr, "class_name can't be null");
5554
5555 // Don't need to check whether this class name is legal or not.
5556 // It has been checked when constant pool is parsed.
5557 // However, make sure it is not an array type.
5558 if (_need_verify) {
5559 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
5560 "Bad class name in class file %s",
5561 CHECK);
5562 }
5563
5564 #ifdef ASSERT
5565 // Basic sanity checks
5566 if (_is_hidden) {
5567 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
5568 }
5569 #endif
5570
5571 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
5572
5573 if (_is_hidden) {
5574 assert(_class_name != nullptr, "Unexpected null _class_name");
5575 #ifdef ASSERT
5576 if (_need_verify) {
5577 verify_legal_class_name(_class_name, CHECK);
5578 }
5579 #endif
5580
5581 } else {
5582 // Check if name in class file matches given name
5583 if (_class_name != class_name_in_cp) {
5584 if (_class_name != vmSymbols::unknown_class_name()) {
5585 ResourceMark rm(THREAD);
5586 Exceptions::fthrow(THREAD_AND_LOCATION,
5587 vmSymbols::java_lang_NoClassDefFoundError(),
5588 "%s (wrong name: %s)",
5589 _class_name->as_C_string(),
5590 class_name_in_cp->as_C_string()
5591 );
5592 return;
5593 } else {
5594 // The class name was not known by the caller so we set it from
5595 // the value in the CP.
5596 update_class_name(class_name_in_cp);
5597 }
5598 // else nothing to do: the expected class name matches what is in the CP
5599 }
5600 }
5601
5602 // Verification prevents us from creating names with dots in them, this
5603 // asserts that that's the case.
5604 assert(is_internal_format(_class_name), "external class name format used internally");
5605
5606 if (!is_internal()) {
5607 LogTarget(Debug, class, preorder) lt;
5608 if (lt.is_enabled()){
5609 ResourceMark rm(THREAD);
5610 LogStream ls(lt);
5611 ls.print("%s", _class_name->as_klass_external_name());
5612 if (stream->source() != nullptr) {
5613 ls.print(" source: %s", stream->source());
5614 }
5615 ls.cr();
5616 }
5617 }
5618
5619 // SUPERKLASS
5620 _super_class_index = stream->get_u2_fast();
5621 _super_klass = parse_super_class(cp,
5622 _super_class_index,
5623 _need_verify,
5624 CHECK);
5625
5626 // Interfaces
5627 _itfs_len = stream->get_u2_fast();
5628 parse_interfaces(stream,
5629 _itfs_len,
5630 cp,
5631 &_has_nonstatic_concrete_methods,
5632 CHECK);
5633
5634 assert(_local_interfaces != nullptr, "invariant");
5635
5636 // Fields (offsets are filled in later)
5637 parse_fields(stream,
5638 _access_flags.is_interface(),
5639 cp,
5640 cp_size,
5641 &_java_fields_count,
5642 CHECK);
5643
5644 assert(_temp_field_info != nullptr, "invariant");
5645
5646 // Methods
5647 parse_methods(stream,
5648 _access_flags.is_interface(),
5649 &_has_localvariable_table,
5650 &_has_final_method,
5651 &_declares_nonstatic_concrete_methods,
5652 CHECK);
5653
5654 assert(_methods != nullptr, "invariant");
5655
5656 if (_declares_nonstatic_concrete_methods) {
5657 _has_nonstatic_concrete_methods = true;
5658 }
5659
5660 // Additional attributes/annotations
5661 _parsed_annotations = new ClassAnnotationCollector();
5662 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5663
5664 assert(_inner_classes != nullptr, "invariant");
5665
5666 // Finalize the Annotations metadata object,
5667 // now that all annotation arrays have been created.
5668 create_combined_annotations(CHECK);
5669
5670 // Make sure this is the end of class file stream
5671 guarantee_property(stream->at_eos(),
5672 "Extra bytes at the end of class file %s",
5673 CHECK);
5674
5675 // all bytes in stream read and parsed
5676 }
5677
5678 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
5679 ResourceMark rm;
5680 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
5681 // use a '/' because that confuses finding the class's package. Also, can't
5682 // use an illegal char such as ';' because that causes serialization issues
5683 // and issues with hidden classes that create their own hidden classes.
5684 char addr_buf[20];
5685 if (CDSConfig::is_dumping_static_archive()) {
5686 // We want stable names for the archived hidden classes (only for static
5687 // archive for now). Spaces under default_SharedBaseAddress() will be
5688 // occupied by the archive at run time, so we know that no dynamically
5689 // loaded InstanceKlass will be placed under there.
5690 static volatile size_t counter = 0;
5691 Atomic::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
5692 size_t new_id = Atomic::add(&counter, (size_t)1);
5693 jio_snprintf(addr_buf, 20, SIZE_FORMAT_X, new_id);
5694 } else {
5695 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
5696 }
5697 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
5698 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
5699 jio_snprintf(new_name, new_name_len, "%s+%s",
5700 _class_name->as_C_string(), addr_buf);
5701 update_class_name(SymbolTable::new_symbol(new_name));
5702
5703 // Add a Utf8 entry containing the hidden name.
5704 assert(_class_name != nullptr, "Unexpected null _class_name");
5705 int hidden_index = _orig_cp_size; // this is an extra slot we added
5706 _cp->symbol_at_put(hidden_index, _class_name);
5707
5708 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
5709 // We have to update the resolved_klass_index and the name_index together
5710 // so extract the existing resolved_klass_index first.
5711 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
5712 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
5713 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
5714 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
5715 "Bad name_index");
5716 }
5717
5718 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5719 ConstantPool* cp,
5720 TRAPS) {
5721 assert(stream != nullptr, "invariant");
5722 assert(stream->at_eos(), "invariant");
5723 assert(cp != nullptr, "invariant");
5724 assert(_loader_data != nullptr, "invariant");
5725
5726 if (_class_name == vmSymbols::java_lang_Object()) {
5727 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
5728 "java.lang.Object cannot implement an interface in class file %s",
5729 CHECK);
5730 }
5731 // We check super class after class file is parsed and format is checked
5732 if (_super_class_index > 0 && nullptr == _super_klass) {
5733 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5734 if (_access_flags.is_interface()) {
5735 // Before attempting to resolve the superclass, check for class format
5736 // errors not checked yet.
5737 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5738 "Interfaces must have java.lang.Object as superclass in class file %s",
5739 CHECK);
5740 }
5741 Handle loader(THREAD, _loader_data->class_loader());
5742 if (loader.is_null() && super_class_name == vmSymbols::java_lang_Object()) {
5743 _super_klass = vmClasses::Object_klass();
5744 } else {
5745 _super_klass = (const InstanceKlass*)
5746 SystemDictionary::resolve_super_or_fail(_class_name,
5747 super_class_name,
5748 loader,
5749 _protection_domain,
5750 true,
5751 CHECK);
5752 }
5753 }
5754
5755 if (_super_klass != nullptr) {
5756 if (_super_klass->has_nonstatic_concrete_methods()) {
5757 _has_nonstatic_concrete_methods = true;
5758 }
5759
5760 if (_super_klass->is_interface()) {
5761 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
5762 return;
5763 }
5764 }
5765
5766 // Compute the transitive list of all unique interfaces implemented by this class
5767 _transitive_interfaces =
5768 compute_transitive_interfaces(_super_klass,
5769 _local_interfaces,
5770 _loader_data,
5771 CHECK);
5772
5773 assert(_transitive_interfaces != nullptr, "invariant");
5774
5775 // sort methods
5776 _method_ordering = sort_methods(_methods);
5777
5778 _all_mirandas = new GrowableArray<Method*>(20);
5779
5780 Handle loader(THREAD, _loader_data->class_loader());
5781 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5782 &_num_miranda_methods,
5783 _all_mirandas,
5784 _super_klass,
5785 _methods,
5786 _access_flags,
5787 _major_version,
5788 loader,
5789 _class_name,
5790 _local_interfaces);
5791
5792 // Size of Java itable (in words)
5793 _itable_size = _access_flags.is_interface() ? 0 :
5794 klassItable::compute_itable_size(_transitive_interfaces);
5795
5796 assert(_parsed_annotations != nullptr, "invariant");
5797
5798 _field_info = new FieldLayoutInfo();
5799 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, /*_fields*/ _temp_field_info,
5800 _parsed_annotations->is_contended(), _field_info);
5801 lb.build_layout();
5802
5803 int injected_fields_count = _temp_field_info->length() - _java_fields_count;
5804 _fieldinfo_stream =
5805 FieldInfoStream::create_FieldInfoStream(_temp_field_info, _java_fields_count,
5806 injected_fields_count, loader_data(), CHECK);
5807 _fields_status =
5808 MetadataFactory::new_array<FieldStatus>(_loader_data, _temp_field_info->length(),
5809 FieldStatus(0), CHECK);
5810 }
5811
5812 void ClassFileParser::set_klass(InstanceKlass* klass) {
5813
5814 #ifdef ASSERT
5815 if (klass != nullptr) {
5816 assert(nullptr == _klass, "leaking?");
5817 }
5818 #endif
5819
5820 _klass = klass;
5821 }
5822
5823 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5824
5825 #ifdef ASSERT
5826 if (klass != nullptr) {
5827 assert(nullptr == _klass_to_deallocate, "leaking?");
5828 }
5829 #endif
5830
5831 _klass_to_deallocate = klass;
5832 }
5833
5834 // Caller responsible for ResourceMark
5835 // clone stream with rewound position
5836 const ClassFileStream* ClassFileParser::clone_stream() const {
5837 assert(_stream != nullptr, "invariant");
5838
5839 return _stream->clone();
5840 }
5841
5842 ReferenceType ClassFileParser::super_reference_type() const {
5843 return _super_klass == nullptr ? REF_NONE : _super_klass->reference_type();
5844 }
5845
5846 bool ClassFileParser::is_instance_ref_klass() const {
5847 // Only the subclasses of j.l.r.Reference are InstanceRefKlass.
5848 // j.l.r.Reference itself is InstanceKlass because InstanceRefKlass denotes a
5849 // klass requiring special treatment in ref-processing. The abstract
5850 // j.l.r.Reference cannot be instantiated so doesn't partake in
5851 // ref-processing.
5852 return is_java_lang_ref_Reference_subclass();
5853 }
5854
5855 bool ClassFileParser::is_java_lang_ref_Reference_subclass() const {
5856 if (_super_klass == nullptr) {
5857 return false;
5858 }
5859
5860 if (_super_klass->name() == vmSymbols::java_lang_ref_Reference()) {
5861 // Direct subclass of j.l.r.Reference: Soft|Weak|Final|Phantom
5862 return true;
5863 }
5864
5865 return _super_klass->reference_type() != REF_NONE;
5866 }
5867
5868 // ----------------------------------------------------------------------------
5869 // debugging
5870
5871 #ifdef ASSERT
5872
5873 // return true if class_name contains no '.' (internal format is '/')
5874 bool ClassFileParser::is_internal_format(Symbol* class_name) {
5875 if (class_name != nullptr) {
5876 ResourceMark rm;
5877 char* name = class_name->as_C_string();
5878 return strchr(name, JVM_SIGNATURE_DOT) == nullptr;
5879 } else {
5880 return true;
5881 }
5882 }
5883
5884 #endif