1 /*
2 * Copyright (c) 1997, 2022, 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
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/classFileParser.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/classLoadInfo.hpp"
32 #include "classfile/defaultMethods.hpp"
33 #include "classfile/fieldLayoutBuilder.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/packageEntry.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/verificationType.hpp"
40 #include "classfile/verifier.hpp"
41 #include "classfile/vmClasses.hpp"
42 #include "classfile/vmSymbols.hpp"
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/fieldStreams.inline.hpp"
53 #include "oops/inlineKlass.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/copy.hpp"
80 #include "utilities/formatBuffer.hpp"
81 #include "utilities/exceptions.hpp"
82 #include "utilities/globalDefinitions.hpp"
83 #include "utilities/growableArray.hpp"
84 #include "utilities/macros.hpp"
85 #include "utilities/ostream.hpp"
86 #include "utilities/resourceHash.hpp"
87 #include "utilities/stringUtils.hpp"
88 #include "utilities/utf8.hpp"
89
90 #if INCLUDE_CDS
91 #include "classfile/systemDictionaryShared.hpp"
92 #endif
93 #if INCLUDE_JFR
94 #include "jfr/support/jfrTraceIdExtension.hpp"
95 #endif
96
97 // We generally try to create the oops directly when parsing, rather than
98 // allocating temporary data structures and copying the bytes twice. A
99 // temporary area is only needed when parsing utf8 entries in the constant
100 // pool and when parsing line number tables.
101
102 // We add assert in debug mode when class format is not checked.
103
104 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
105 #define JAVA_MIN_SUPPORTED_VERSION 45
106 #define JAVA_PREVIEW_MINOR_VERSION 65535
107
108 // Used for two backward compatibility reasons:
109 // - to check for new additions to the class file format in JDK1.5
110 // - to check for bug fixes in the format checker in JDK1.5
111 #define JAVA_1_5_VERSION 49
112
113 // Used for backward compatibility reasons:
114 // - to check for javac bug fixes that happened after 1.5
115 // - also used as the max version when running in jdk6
116 #define JAVA_6_VERSION 50
117
118 // Used for backward compatibility reasons:
119 // - to disallow argument and require ACC_STATIC for <clinit> methods
120 #define JAVA_7_VERSION 51
121
122 // Extension method support.
123 #define JAVA_8_VERSION 52
124
125 #define JAVA_9_VERSION 53
126
127 #define JAVA_10_VERSION 54
128
129 #define JAVA_11_VERSION 55
130
131 #define JAVA_12_VERSION 56
132
133 #define JAVA_13_VERSION 57
134
135 #define JAVA_14_VERSION 58
136
137 #define JAVA_15_VERSION 59
138
139 #define JAVA_16_VERSION 60
140
141 #define JAVA_17_VERSION 61
142
143 #define JAVA_18_VERSION 62
144
145 #define CONSTANT_CLASS_DESCRIPTORS 62
146
147
148 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
149 assert((bad_constant == JVM_CONSTANT_Module ||
150 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
151 "Unexpected bad constant pool entry");
152 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
153 }
154
155 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
156 ConstantPool* cp,
157 const int length,
158 TRAPS) {
159 assert(stream != NULL, "invariant");
160 assert(cp != NULL, "invariant");
161
162 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
163 // this function (_current can be allocated in a register, with scalar
164 // replacement of aggregates). The _current pointer is copied back to
165 // stream() when this function returns. DON'T call another method within
166 // this method that uses stream().
167 const ClassFileStream cfs1 = *stream;
168 const ClassFileStream* const cfs = &cfs1;
169
170 assert(cfs->allocated_on_stack_or_embedded(), "should be local");
171 debug_only(const u1* const old_current = stream->current();)
172
173 // Used for batching symbol allocations.
174 const char* names[SymbolTable::symbol_alloc_batch_size];
175 int lengths[SymbolTable::symbol_alloc_batch_size];
176 int indices[SymbolTable::symbol_alloc_batch_size];
177 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
178 int names_count = 0;
179
180 // parsing Index 0 is unused
181 for (int index = 1; index < length; index++) {
182 // Each of the following case guarantees one more byte in the stream
183 // for the following tag or the access_flags following constant pool,
184 // so we don't need bounds-check for reading tag.
185 const u1 tag = cfs->get_u1_fast();
186 switch (tag) {
187 case JVM_CONSTANT_Class: {
188 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
189 const u2 name_index = cfs->get_u2_fast();
190 cp->klass_index_at_put(index, name_index);
191 break;
192 }
193 case JVM_CONSTANT_Fieldref: {
194 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
195 const u2 class_index = cfs->get_u2_fast();
196 const u2 name_and_type_index = cfs->get_u2_fast();
197 cp->field_at_put(index, class_index, name_and_type_index);
198 break;
199 }
200 case JVM_CONSTANT_Methodref: {
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->method_at_put(index, class_index, name_and_type_index);
205 break;
206 }
207 case JVM_CONSTANT_InterfaceMethodref: {
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->interface_method_at_put(index, class_index, name_and_type_index);
212 break;
213 }
214 case JVM_CONSTANT_String : {
215 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
216 const u2 string_index = cfs->get_u2_fast();
217 cp->string_index_at_put(index, string_index);
218 break;
219 }
220 case JVM_CONSTANT_MethodHandle :
221 case JVM_CONSTANT_MethodType: {
222 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
223 classfile_parse_error(
224 "Class file version does not support constant tag %u in class file %s",
225 tag, THREAD);
226 return;
227 }
228 if (tag == JVM_CONSTANT_MethodHandle) {
229 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
230 const u1 ref_kind = cfs->get_u1_fast();
231 const u2 method_index = cfs->get_u2_fast();
232 cp->method_handle_index_at_put(index, ref_kind, method_index);
233 }
234 else if (tag == JVM_CONSTANT_MethodType) {
235 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
236 const u2 signature_index = cfs->get_u2_fast();
237 cp->method_type_index_at_put(index, signature_index);
238 }
239 else {
240 ShouldNotReachHere();
241 }
242 break;
243 }
244 case JVM_CONSTANT_Dynamic : {
245 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
246 classfile_parse_error(
247 "Class file version does not support constant tag %u in class file %s",
248 tag, THREAD);
249 return;
250 }
251 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
252 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
253 const u2 name_and_type_index = cfs->get_u2_fast();
254 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
255 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
256 }
257 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
258 break;
259 }
260 case JVM_CONSTANT_InvokeDynamic : {
261 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
262 classfile_parse_error(
263 "Class file version does not support constant tag %u in class file %s",
264 tag, THREAD);
265 return;
266 }
267 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
268 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
269 const u2 name_and_type_index = cfs->get_u2_fast();
270 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
271 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
272 }
273 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
274 break;
275 }
276 case JVM_CONSTANT_Integer: {
277 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
278 const u4 bytes = cfs->get_u4_fast();
279 cp->int_at_put(index, (jint)bytes);
280 break;
281 }
282 case JVM_CONSTANT_Float: {
283 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
284 const u4 bytes = cfs->get_u4_fast();
285 cp->float_at_put(index, *(jfloat*)&bytes);
286 break;
287 }
288 case JVM_CONSTANT_Long: {
289 // A mangled type might cause you to overrun allocated memory
290 guarantee_property(index + 1 < length,
291 "Invalid constant pool entry %u in class file %s",
292 index,
293 CHECK);
294 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
295 const u8 bytes = cfs->get_u8_fast();
296 cp->long_at_put(index, bytes);
297 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
298 break;
299 }
300 case JVM_CONSTANT_Double: {
301 // A mangled type might cause you to overrun allocated memory
302 guarantee_property(index+1 < length,
303 "Invalid constant pool entry %u in class file %s",
304 index,
305 CHECK);
306 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
307 const u8 bytes = cfs->get_u8_fast();
308 cp->double_at_put(index, *(jdouble*)&bytes);
309 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
310 break;
311 }
312 case JVM_CONSTANT_NameAndType: {
313 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
314 const u2 name_index = cfs->get_u2_fast();
315 const u2 signature_index = cfs->get_u2_fast();
316 cp->name_and_type_at_put(index, name_index, signature_index);
317 break;
318 }
319 case JVM_CONSTANT_Utf8 : {
320 cfs->guarantee_more(2, CHECK); // utf8_length
321 u2 utf8_length = cfs->get_u2_fast();
322 const u1* utf8_buffer = cfs->current();
323 assert(utf8_buffer != NULL, "null utf8 buffer");
324 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
325 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
326 cfs->skip_u1_fast(utf8_length);
327
328 // Before storing the symbol, make sure it's legal
329 if (_need_verify) {
330 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
331 }
332
333 unsigned int hash;
334 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
335 utf8_length,
336 hash);
337 if (result == NULL) {
338 names[names_count] = (const char*)utf8_buffer;
339 lengths[names_count] = utf8_length;
340 indices[names_count] = index;
341 hashValues[names_count++] = hash;
342 if (names_count == SymbolTable::symbol_alloc_batch_size) {
343 SymbolTable::new_symbols(_loader_data,
344 constantPoolHandle(THREAD, cp),
345 names_count,
346 names,
347 lengths,
348 indices,
349 hashValues);
350 names_count = 0;
351 }
352 } else {
353 cp->symbol_at_put(index, result);
354 }
355 break;
356 }
357 case JVM_CONSTANT_Module:
358 case JVM_CONSTANT_Package: {
359 // Record that an error occurred in these two cases but keep parsing so
360 // that ACC_Module can be checked for in the access_flags. Need to
361 // throw NoClassDefFoundError in that case.
362 if (_major_version >= JAVA_9_VERSION) {
363 cfs->guarantee_more(3, CHECK);
364 cfs->get_u2_fast();
365 set_class_bad_constant_seen(tag);
366 break;
367 }
368 }
369 default: {
370 classfile_parse_error("Unknown constant tag %u in class file %s",
371 tag,
372 THREAD);
373 return;
374 }
375 } // end of switch(tag)
376 } // end of for
377
378 // Allocate the remaining symbols
379 if (names_count > 0) {
380 SymbolTable::new_symbols(_loader_data,
381 constantPoolHandle(THREAD, cp),
382 names_count,
383 names,
384 lengths,
385 indices,
386 hashValues);
387 }
388
389 // Copy _current pointer of local copy back to stream.
390 assert(stream->current() == old_current, "non-exclusive use of stream");
391 stream->set_current(cfs1.current());
392
393 }
394
395 static inline bool valid_cp_range(int index, int length) {
396 return (index > 0 && index < length);
397 }
398
399 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
400 assert(cp != NULL, "invariant");
401 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
402 return cp->symbol_at(index);
403 }
404 return NULL;
405 }
406
407 #ifdef ASSERT
408 PRAGMA_DIAG_PUSH
409 PRAGMA_FORMAT_NONLITERAL_IGNORED
410 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
411 ResourceMark rm(THREAD);
412 fatal(msg, _class_name->as_C_string());
413 }
414
415 void ClassFileParser::report_assert_property_failure(const char* msg,
416 int index,
417 TRAPS) const {
418 ResourceMark rm(THREAD);
419 fatal(msg, index, _class_name->as_C_string());
420 }
421 PRAGMA_DIAG_POP
422 #endif
423
424 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
425 ConstantPool* const cp,
426 const int length,
427 TRAPS) {
428 assert(cp != NULL, "invariant");
429 assert(stream != NULL, "invariant");
430
431 // parsing constant pool entries
432 parse_constant_pool_entries(stream, cp, length, CHECK);
433 if (class_bad_constant_seen() != 0) {
434 // a bad CP entry has been detected previously so stop parsing and just return.
435 return;
436 }
437
438 int index = 1; // declared outside of loops for portability
439 int num_klasses = 0;
440
441 // first verification pass - validate cross references
442 // and fixup class and string constants
443 for (index = 1; index < length; index++) { // Index 0 is unused
444 const jbyte tag = cp->tag_at(index).value();
445 switch (tag) {
446 case JVM_CONSTANT_Class: {
447 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
448 break;
449 }
450 case JVM_CONSTANT_Fieldref:
451 // fall through
452 case JVM_CONSTANT_Methodref:
453 // fall through
454 case JVM_CONSTANT_InterfaceMethodref: {
455 if (!_need_verify) break;
456 const int klass_ref_index = cp->klass_ref_index_at(index);
457 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
458 check_property(valid_klass_reference_at(klass_ref_index),
459 "Invalid constant pool index %u in class file %s",
460 klass_ref_index, CHECK);
461 check_property(valid_cp_range(name_and_type_ref_index, length) &&
462 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
463 "Invalid constant pool index %u in class file %s",
464 name_and_type_ref_index, CHECK);
465 break;
466 }
467 case JVM_CONSTANT_String: {
468 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
469 break;
470 }
471 case JVM_CONSTANT_Integer:
472 break;
473 case JVM_CONSTANT_Float:
474 break;
475 case JVM_CONSTANT_Long:
476 case JVM_CONSTANT_Double: {
477 index++;
478 check_property(
479 (index < length && cp->tag_at(index).is_invalid()),
480 "Improper constant pool long/double index %u in class file %s",
481 index, CHECK);
482 break;
483 }
484 case JVM_CONSTANT_NameAndType: {
485 if (!_need_verify) break;
486 const int name_ref_index = cp->name_ref_index_at(index);
487 const int signature_ref_index = cp->signature_ref_index_at(index);
488 check_property(valid_symbol_at(name_ref_index),
489 "Invalid constant pool index %u in class file %s",
490 name_ref_index, CHECK);
491 check_property(valid_symbol_at(signature_ref_index),
492 "Invalid constant pool index %u in class file %s",
493 signature_ref_index, CHECK);
494 break;
495 }
496 case JVM_CONSTANT_Utf8:
497 break;
498 case JVM_CONSTANT_UnresolvedClass: // fall-through
499 case JVM_CONSTANT_UnresolvedClassInError: {
500 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
501 break;
502 }
503 case JVM_CONSTANT_ClassIndex: {
504 const int class_index = cp->klass_index_at(index);
505 check_property(valid_symbol_at(class_index),
506 "Invalid constant pool index %u in class file %s",
507 class_index, CHECK);
508
509 Symbol* const name = cp->symbol_at(class_index);
510 const unsigned int name_len = name->utf8_length();
511 if (name->is_Q_signature()) {
512 cp->unresolved_qdescriptor_at_put(index, class_index, num_klasses++);
513 } else {
514 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
515 }
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->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->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 // unless it's an inline type.
717 const unsigned int name_len = name->utf8_length();
718 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
719 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
720 if (name != vmSymbols::object_initializer_name()) {
721 classfile_parse_error(
722 "Bad method name at constant pool index %u in class file %s",
723 name_ref_index, THREAD);
724 return;
725 } else if (!Signature::is_void_method(signature)) {
726 // if return type is non-void then it cannot be a basic primitive
727 // and primitve types must be supported.
728 if (!signature->ends_with(JVM_SIGNATURE_ENDCLASS) || !EnableValhalla) {
729 throwIllegalSignature("Method", name, signature, CHECK);
730 }
731 }
732 }
733 }
734 break;
735 }
736 case JVM_CONSTANT_MethodHandle: {
737 const int ref_index = cp->method_handle_index_at(index);
738 const int ref_kind = cp->method_handle_ref_kind_at(index);
739 switch (ref_kind) {
740 case JVM_REF_invokeVirtual:
741 case JVM_REF_invokeStatic:
742 case JVM_REF_invokeSpecial:
743 case JVM_REF_newInvokeSpecial: {
744 const int name_and_type_ref_index =
745 cp->name_and_type_ref_index_at(ref_index);
746 const int name_ref_index =
747 cp->name_ref_index_at(name_and_type_ref_index);
748 const Symbol* const name = cp->symbol_at(name_ref_index);
749 if (name != vmSymbols::object_initializer_name()) {
750 if (ref_kind == JVM_REF_newInvokeSpecial) {
751 classfile_parse_error(
752 "Bad constructor name at constant pool index %u in class file %s",
753 name_ref_index, THREAD);
754 return;
755 }
756 } else {
757 // The allowed invocation mode of <init> depends on its signature.
758 // This test corresponds to verify_invoke_instructions in the verifier.
759 const int signature_ref_index =
760 cp->signature_ref_index_at(name_and_type_ref_index);
761 const Symbol* const signature = cp->symbol_at(signature_ref_index);
762 if (signature->is_void_method_signature()
763 && ref_kind == JVM_REF_newInvokeSpecial) {
764 // OK, could be a constructor call
765 } else if (!signature->is_void_method_signature()
766 && ref_kind == JVM_REF_invokeStatic) {
767 // also OK, could be a static factory call
768 } else {
769 classfile_parse_error(
770 "Bad method name at constant pool index %u in class file %s",
771 name_ref_index, THREAD);
772 return;
773 }
774 }
775 break;
776 }
777 // Other ref_kinds are already fully checked in previous pass.
778 } // switch(ref_kind)
779 break;
780 }
781 case JVM_CONSTANT_MethodType: {
782 const Symbol* const no_name = vmSymbols::type_name(); // place holder
783 const Symbol* const signature = cp->method_type_signature_at(index);
784 verify_legal_method_signature(no_name, signature, CHECK);
785 break;
786 }
787 case JVM_CONSTANT_Utf8: {
788 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
789 }
790 } // switch(tag)
791 } // end of for
792 }
793
794 class NameSigHash: public ResourceObj {
795 public:
796 const Symbol* _name; // name
797 const Symbol* _sig; // signature
798 NameSigHash* _next; // Next entry in hash table
799 };
800
801 static const int HASH_ROW_SIZE = 256;
802
803 static unsigned int hash(const Symbol* name, const Symbol* sig) {
804 unsigned int raw_hash = 0;
805 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
806 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
807
808 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
809 }
810
811
812 static void initialize_hashtable(NameSigHash** table) {
813 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
814 }
815 // Return false if the name/sig combination is found in table.
816 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
817 // The old format checker uses heap sort to find duplicates.
818 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
819 // of table since we don't expect Symbol*'s to move.
820 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
821 assert(name != NULL, "name in constant pool is NULL");
822
823 // First lookup for duplicates
824 int index = hash(name, sig);
825 NameSigHash* entry = table[index];
826 while (entry != NULL) {
827 if (entry->_name == name && entry->_sig == sig) {
828 return false;
829 }
830 entry = entry->_next;
831 }
832
833 // No duplicate is found, allocate a new entry and fill it.
834 entry = new NameSigHash();
835 entry->_name = name;
836 entry->_sig = sig;
837
838 // Insert into hash table
839 entry->_next = table[index];
840 table[index] = entry;
841
842 return true;
843 }
844
845 // Side-effects: populates the _local_interfaces field
846 void ClassFileParser::parse_interfaces(const ClassFileStream* stream,
847 int itfs_len,
848 ConstantPool* cp,
849 bool* const has_nonstatic_concrete_methods,
850 // FIXME: lots of these functions
851 // declare their parameters as const,
852 // which adds only noise to the code.
853 // Remove the spurious const modifiers.
854 // Many are of the form "const int x"
855 // or "T* const x".
856 bool* const is_declared_atomic,
857 TRAPS) {
858 assert(stream != NULL, "invariant");
859 assert(cp != NULL, "invariant");
860 assert(has_nonstatic_concrete_methods != NULL, "invariant");
861
862 if (itfs_len == 0) {
863 _temp_local_interfaces = new GrowableArray<InstanceKlass*>(0);
864 } else {
865 assert(itfs_len > 0, "only called for len>0");
866 _temp_local_interfaces = new GrowableArray<InstanceKlass*>(itfs_len);
867 int index = 0;
868 for (index = 0; index < itfs_len; index++) {
869 const u2 interface_index = stream->get_u2(CHECK);
870 Klass* interf;
871 check_property(
872 valid_klass_reference_at(interface_index),
873 "Interface name has bad constant pool index %u in class file %s",
874 interface_index, CHECK);
875 if (cp->tag_at(interface_index).is_klass()) {
876 interf = cp->resolved_klass_at(interface_index);
877 } else {
878 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
879
880 // Don't need to check legal name because it's checked when parsing constant pool.
881 // But need to make sure it's not an array type.
882 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
883 "Bad interface name in class file %s", CHECK);
884
885 // Call resolve_super so class circularity is checked
886 interf = SystemDictionary::resolve_super_or_fail(
887 _class_name,
888 unresolved_klass,
889 Handle(THREAD, _loader_data->class_loader()),
890 _protection_domain,
891 false,
892 CHECK);
893 }
894
895 if (!interf->is_interface()) {
896 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
897 err_msg("class %s can not implement %s, because it is not an interface (%s)",
898 _class_name->as_klass_external_name(),
899 interf->external_name(),
900 interf->class_in_module_of_loader()));
901 }
902
903 InstanceKlass* ik = InstanceKlass::cast(interf);
904 if (is_inline_type() && ik->invalid_inline_super()) {
905 ResourceMark rm(THREAD);
906 Exceptions::fthrow(
907 THREAD_AND_LOCATION,
908 vmSymbols::java_lang_IncompatibleClassChangeError(),
909 "Inline type %s attempts to implement interface java.lang.IdentityObject",
910 _class_name->as_klass_external_name());
911 return;
912 }
913 if (ik->invalid_inline_super()) {
914 set_invalid_inline_super();
915 }
916 if (ik->has_nonstatic_concrete_methods()) {
917 *has_nonstatic_concrete_methods = true;
918 }
919 if (ik->is_declared_atomic()) {
920 *is_declared_atomic = true;
921 }
922 if (ik->name() == vmSymbols::java_lang_IdentityObject()) {
923 _implements_identityObject = true;
924 }
925 if (ik->name() == vmSymbols::java_lang_ValueObject()) {
926 // further checks for "is_invalid_super_for_inline_type()" needed later
927 // needs field parsing, delay unitl post_process_parse_stream()
928 _implements_valueObject = true;
929 }
930 _temp_local_interfaces->append(ik);
931 }
932
933 if (!_need_verify || itfs_len <= 1) {
934 return;
935 }
936
937 // Check if there's any duplicates in interfaces
938 ResourceMark rm(THREAD);
939 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
940 NameSigHash*,
941 HASH_ROW_SIZE);
942 initialize_hashtable(interface_names);
943 bool dup = false;
944 const Symbol* name = NULL;
945 {
946 debug_only(NoSafepointVerifier nsv;)
947 for (index = 0; index < itfs_len; index++) {
948 const InstanceKlass* const k = _temp_local_interfaces->at(index);
949 name = k->name();
950 // If no duplicates, add (name, NULL) in hashtable interface_names.
951 if (!put_after_lookup(name, NULL, interface_names)) {
952 dup = true;
953 break;
954 }
955 }
956 }
957 if (dup) {
958 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
959 name->as_C_string(), THREAD);
960 }
961 }
962 }
963
964 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
965 int constantvalue_index,
966 int signature_index,
967 TRAPS) const {
968 // Make sure the constant pool entry is of a type appropriate to this field
969 guarantee_property(
970 (constantvalue_index > 0 &&
971 constantvalue_index < cp->length()),
972 "Bad initial value index %u in ConstantValue attribute in class file %s",
973 constantvalue_index, CHECK);
974
975 const constantTag value_type = cp->tag_at(constantvalue_index);
976 switch(cp->basic_type_for_signature_at(signature_index)) {
977 case T_LONG: {
978 guarantee_property(value_type.is_long(),
979 "Inconsistent constant value type in class file %s",
980 CHECK);
981 break;
982 }
983 case T_FLOAT: {
984 guarantee_property(value_type.is_float(),
985 "Inconsistent constant value type in class file %s",
986 CHECK);
987 break;
988 }
989 case T_DOUBLE: {
990 guarantee_property(value_type.is_double(),
991 "Inconsistent constant value type in class file %s",
992 CHECK);
993 break;
994 }
995 case T_BYTE:
996 case T_CHAR:
997 case T_SHORT:
998 case T_BOOLEAN:
999 case T_INT: {
1000 guarantee_property(value_type.is_int(),
1001 "Inconsistent constant value type in class file %s",
1002 CHECK);
1003 break;
1004 }
1005 case T_OBJECT: {
1006 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1007 && value_type.is_string()),
1008 "Bad string initial value in class file %s",
1009 CHECK);
1010 break;
1011 }
1012 default: {
1013 classfile_parse_error("Unable to set initial value %u in class file %s",
1014 constantvalue_index,
1015 THREAD);
1016 }
1017 }
1018 }
1019
1020 class AnnotationCollector : public ResourceObj{
1021 public:
1022 enum Location { _in_field, _in_method, _in_class };
1023 enum ID {
1024 _unknown = 0,
1025 _method_CallerSensitive,
1026 _method_ForceInline,
1027 _method_DontInline,
1028 _method_InjectedProfile,
1029 _method_LambdaForm_Compiled,
1030 _method_Hidden,
1031 _method_Scoped,
1032 _method_IntrinsicCandidate,
1033 _jdk_internal_vm_annotation_Contended,
1034 _field_Stable,
1035 _jdk_internal_vm_annotation_ReservedStackAccess,
1036 _jdk_internal_ValueBased,
1037 _annotation_LIMIT
1038 };
1039 const Location _location;
1040 int _annotations_present;
1041 u2 _contended_group;
1042
1043 AnnotationCollector(Location location)
1044 : _location(location), _annotations_present(0), _contended_group(0)
1045 {
1046 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1047 }
1048 // If this annotation name has an ID, report it (or _none).
1049 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
1050 // Set the annotation name:
1051 void set_annotation(ID id) {
1052 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1053 _annotations_present |= nth_bit((int)id);
1054 }
1055
1056 void remove_annotation(ID id) {
1057 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1058 _annotations_present &= ~nth_bit((int)id);
1059 }
1060
1061 // Report if the annotation is present.
1062 bool has_any_annotations() const { return _annotations_present != 0; }
1063 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1064
1065 void set_contended_group(u2 group) { _contended_group = group; }
1066 u2 contended_group() const { return _contended_group; }
1067
1068 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1069
1070 void set_stable(bool stable) { set_annotation(_field_Stable); }
1071 bool is_stable() const { return has_annotation(_field_Stable); }
1072 };
1073
1074 // This class also doubles as a holder for metadata cleanup.
1075 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1076 private:
1077 ClassLoaderData* _loader_data;
1078 AnnotationArray* _field_annotations;
1079 AnnotationArray* _field_type_annotations;
1080 public:
1081 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1082 AnnotationCollector(_in_field),
1083 _loader_data(loader_data),
1084 _field_annotations(NULL),
1085 _field_type_annotations(NULL) {}
1086 ~FieldAnnotationCollector();
1087 void apply_to(FieldInfo* f);
1088 AnnotationArray* field_annotations() { return _field_annotations; }
1089 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1090
1091 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1092 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1093 };
1094
1095 class MethodAnnotationCollector : public AnnotationCollector{
1096 public:
1097 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1098 void apply_to(const methodHandle& m);
1099 };
1100
1101 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1102 public:
1103 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1104 void apply_to(InstanceKlass* ik);
1105 };
1106
1107
1108 static int skip_annotation_value(const u1*, int, int); // fwd decl
1109
1110 // Safely increment index by val if does not pass limit
1111 #define SAFE_ADD(index, limit, val) \
1112 if (index >= limit - val) return limit; \
1113 index += val;
1114
1115 // Skip an annotation. Return >=limit if there is any problem.
1116 static int skip_annotation(const u1* buffer, int limit, int index) {
1117 assert(buffer != NULL, "invariant");
1118 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1119 // value := switch (tag:u1) { ... }
1120 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1121 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1122 while (--nmem >= 0 && index < limit) {
1123 SAFE_ADD(index, limit, 2); // skip member
1124 index = skip_annotation_value(buffer, limit, index);
1125 }
1126 return index;
1127 }
1128
1129 // Skip an annotation value. Return >=limit if there is any problem.
1130 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1131 assert(buffer != NULL, "invariant");
1132
1133 // value := switch (tag:u1) {
1134 // case B, C, I, S, Z, D, F, J, c: con:u2;
1135 // case e: e_class:u2 e_name:u2;
1136 // case s: s_con:u2;
1137 // case [: do(nval:u2) {value};
1138 // case @: annotation;
1139 // case s: s_con:u2;
1140 // }
1141 SAFE_ADD(index, limit, 1); // read tag
1142 const u1 tag = buffer[index - 1];
1143 switch (tag) {
1144 case 'B':
1145 case 'C':
1146 case 'I':
1147 case 'S':
1148 case 'Z':
1149 case 'D':
1150 case 'F':
1151 case 'J':
1152 case 'c':
1153 case 's':
1154 SAFE_ADD(index, limit, 2); // skip con or s_con
1155 break;
1156 case 'e':
1157 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1158 break;
1159 case '[':
1160 {
1161 SAFE_ADD(index, limit, 2); // read nval
1162 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1163 while (--nval >= 0 && index < limit) {
1164 index = skip_annotation_value(buffer, limit, index);
1165 }
1166 }
1167 break;
1168 case '@':
1169 index = skip_annotation(buffer, limit, index);
1170 break;
1171 default:
1172 return limit; // bad tag byte
1173 }
1174 return index;
1175 }
1176
1177 // Sift through annotations, looking for those significant to the VM:
1178 static void parse_annotations(const ConstantPool* const cp,
1179 const u1* buffer, int limit,
1180 AnnotationCollector* coll,
1181 ClassLoaderData* loader_data,
1182 const bool can_access_vm_annotations) {
1183
1184 assert(cp != NULL, "invariant");
1185 assert(buffer != NULL, "invariant");
1186 assert(coll != NULL, "invariant");
1187 assert(loader_data != NULL, "invariant");
1188
1189 // annotations := do(nann:u2) {annotation}
1190 int index = 2; // read nann
1191 if (index >= limit) return;
1192 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1193 enum { // initial annotation layout
1194 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1195 count_off = 2, // u2 such as 1 (one value)
1196 member_off = 4, // utf8 such as 'value'
1197 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1198 e_tag_val = 'e',
1199 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1200 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1201 e_size = 11, // end of 'e' annotation
1202 c_tag_val = 'c', // payload is type
1203 c_con_off = 7, // utf8 payload, such as 'I'
1204 c_size = 9, // end of 'c' annotation
1205 s_tag_val = 's', // payload is String
1206 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1207 s_size = 9,
1208 min_size = 6 // smallest possible size (zero members)
1209 };
1210 // Cannot add min_size to index in case of overflow MAX_INT
1211 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1212 int index0 = index;
1213 index = skip_annotation(buffer, limit, index);
1214 const u1* const abase = buffer + index0;
1215 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1216 const int count = Bytes::get_Java_u2((address)abase + count_off);
1217 const Symbol* const aname = check_symbol_at(cp, atype);
1218 if (aname == NULL) break; // invalid annotation name
1219 const Symbol* member = NULL;
1220 if (count >= 1) {
1221 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1222 member = check_symbol_at(cp, member_index);
1223 if (member == NULL) break; // invalid member name
1224 }
1225
1226 // Here is where parsing particular annotations will take place.
1227 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1228 if (AnnotationCollector::_unknown == id) continue;
1229 coll->set_annotation(id);
1230
1231 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1232 // @Contended can optionally specify the contention group.
1233 //
1234 // Contended group defines the equivalence class over the fields:
1235 // the fields within the same contended group are not treated distinct.
1236 // The only exception is default group, which does not incur the
1237 // equivalence. Naturally, contention group for classes is meaningless.
1238 //
1239 // While the contention group is specified as String, annotation
1240 // values are already interned, and we might as well use the constant
1241 // pool index as the group tag.
1242 //
1243 u2 group_index = 0; // default contended group
1244 if (count == 1
1245 && s_size == (index - index0) // match size
1246 && s_tag_val == *(abase + tag_off)
1247 && member == vmSymbols::value_name()) {
1248 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1249 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1250 group_index = 0; // default contended group
1251 }
1252 }
1253 coll->set_contended_group(group_index);
1254 }
1255 }
1256 }
1257
1258
1259 // Parse attributes for a field.
1260 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1261 u2 attributes_count,
1262 bool is_static, u2 signature_index,
1263 u2* const constantvalue_index_addr,
1264 bool* const is_synthetic_addr,
1265 u2* const generic_signature_index_addr,
1266 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1267 TRAPS) {
1268 assert(cfs != NULL, "invariant");
1269 assert(constantvalue_index_addr != NULL, "invariant");
1270 assert(is_synthetic_addr != NULL, "invariant");
1271 assert(generic_signature_index_addr != NULL, "invariant");
1272 assert(parsed_annotations != NULL, "invariant");
1273 assert(attributes_count > 0, "attributes_count should be greater than 0");
1274
1275 u2 constantvalue_index = 0;
1276 u2 generic_signature_index = 0;
1277 bool is_synthetic = false;
1278 const u1* runtime_visible_annotations = NULL;
1279 int runtime_visible_annotations_length = 0;
1280 const u1* runtime_invisible_annotations = NULL;
1281 int runtime_invisible_annotations_length = 0;
1282 const u1* runtime_visible_type_annotations = NULL;
1283 int runtime_visible_type_annotations_length = 0;
1284 const u1* runtime_invisible_type_annotations = NULL;
1285 int runtime_invisible_type_annotations_length = 0;
1286 bool runtime_invisible_annotations_exists = false;
1287 bool runtime_invisible_type_annotations_exists = false;
1288 const ConstantPool* const cp = _cp;
1289
1290 while (attributes_count--) {
1291 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1292 const u2 attribute_name_index = cfs->get_u2_fast();
1293 const u4 attribute_length = cfs->get_u4_fast();
1294 check_property(valid_symbol_at(attribute_name_index),
1295 "Invalid field attribute index %u in class file %s",
1296 attribute_name_index,
1297 CHECK);
1298
1299 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1300 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1301 // ignore if non-static
1302 if (constantvalue_index != 0) {
1303 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1304 return;
1305 }
1306 check_property(
1307 attribute_length == 2,
1308 "Invalid ConstantValue field attribute length %u in class file %s",
1309 attribute_length, CHECK);
1310
1311 constantvalue_index = cfs->get_u2(CHECK);
1312 if (_need_verify) {
1313 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1314 }
1315 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1316 if (attribute_length != 0) {
1317 classfile_parse_error(
1318 "Invalid Synthetic field attribute length %u in class file %s",
1319 attribute_length, THREAD);
1320 return;
1321 }
1322 is_synthetic = true;
1323 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1324 if (attribute_length != 0) {
1325 classfile_parse_error(
1326 "Invalid Deprecated field attribute length %u in class file %s",
1327 attribute_length, THREAD);
1328 return;
1329 }
1330 } else if (_major_version >= JAVA_1_5_VERSION) {
1331 if (attribute_name == vmSymbols::tag_signature()) {
1332 if (generic_signature_index != 0) {
1333 classfile_parse_error(
1334 "Multiple Signature attributes for field in class file %s", THREAD);
1335 return;
1336 }
1337 if (attribute_length != 2) {
1338 classfile_parse_error(
1339 "Wrong size %u for field's Signature attribute in class file %s",
1340 attribute_length, THREAD);
1341 return;
1342 }
1343 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1344 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1345 if (runtime_visible_annotations != NULL) {
1346 classfile_parse_error(
1347 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1348 return;
1349 }
1350 runtime_visible_annotations_length = attribute_length;
1351 runtime_visible_annotations = cfs->current();
1352 assert(runtime_visible_annotations != NULL, "null visible annotations");
1353 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1354 parse_annotations(cp,
1355 runtime_visible_annotations,
1356 runtime_visible_annotations_length,
1357 parsed_annotations,
1358 _loader_data,
1359 _can_access_vm_annotations);
1360 cfs->skip_u1_fast(runtime_visible_annotations_length);
1361 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1362 if (runtime_invisible_annotations_exists) {
1363 classfile_parse_error(
1364 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1365 return;
1366 }
1367 runtime_invisible_annotations_exists = true;
1368 if (PreserveAllAnnotations) {
1369 runtime_invisible_annotations_length = attribute_length;
1370 runtime_invisible_annotations = cfs->current();
1371 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1372 }
1373 cfs->skip_u1(attribute_length, CHECK);
1374 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1375 if (runtime_visible_type_annotations != NULL) {
1376 classfile_parse_error(
1377 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1378 return;
1379 }
1380 runtime_visible_type_annotations_length = attribute_length;
1381 runtime_visible_type_annotations = cfs->current();
1382 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1383 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1384 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1385 if (runtime_invisible_type_annotations_exists) {
1386 classfile_parse_error(
1387 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1388 return;
1389 } else {
1390 runtime_invisible_type_annotations_exists = true;
1391 }
1392 if (PreserveAllAnnotations) {
1393 runtime_invisible_type_annotations_length = attribute_length;
1394 runtime_invisible_type_annotations = cfs->current();
1395 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1396 }
1397 cfs->skip_u1(attribute_length, CHECK);
1398 } else {
1399 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1400 }
1401 } else {
1402 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1403 }
1404 }
1405
1406 *constantvalue_index_addr = constantvalue_index;
1407 *is_synthetic_addr = is_synthetic;
1408 *generic_signature_index_addr = generic_signature_index;
1409 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1410 runtime_visible_annotations_length,
1411 runtime_invisible_annotations,
1412 runtime_invisible_annotations_length,
1413 CHECK);
1414 parsed_annotations->set_field_annotations(a);
1415 a = assemble_annotations(runtime_visible_type_annotations,
1416 runtime_visible_type_annotations_length,
1417 runtime_invisible_type_annotations,
1418 runtime_invisible_type_annotations_length,
1419 CHECK);
1420 parsed_annotations->set_field_type_annotations(a);
1421 return;
1422 }
1423
1424
1425 // Field allocation types. Used for computing field offsets.
1426
1427 enum FieldAllocationType {
1428 STATIC_OOP, // Oops
1429 STATIC_BYTE, // Boolean, Byte, char
1430 STATIC_SHORT, // shorts
1431 STATIC_WORD, // ints
1432 STATIC_DOUBLE, // aligned long or double
1433 STATIC_INLINE, // inline type field
1434 NONSTATIC_OOP,
1435 NONSTATIC_BYTE,
1436 NONSTATIC_SHORT,
1437 NONSTATIC_WORD,
1438 NONSTATIC_DOUBLE,
1439 NONSTATIC_INLINE,
1440 MAX_FIELD_ALLOCATION_TYPE,
1441 BAD_ALLOCATION_TYPE = -1
1442 };
1443
1444 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1445 BAD_ALLOCATION_TYPE, // 0
1446 BAD_ALLOCATION_TYPE, // 1
1447 BAD_ALLOCATION_TYPE, // 2
1448 BAD_ALLOCATION_TYPE, // 3
1449 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1450 NONSTATIC_SHORT, // T_CHAR = 5,
1451 NONSTATIC_WORD, // T_FLOAT = 6,
1452 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1453 NONSTATIC_BYTE, // T_BYTE = 8,
1454 NONSTATIC_SHORT, // T_SHORT = 9,
1455 NONSTATIC_WORD, // T_INT = 10,
1456 NONSTATIC_DOUBLE, // T_LONG = 11,
1457 NONSTATIC_OOP, // T_OBJECT = 12,
1458 NONSTATIC_OOP, // T_ARRAY = 13,
1459 NONSTATIC_OOP, // T_INLINE_TYPE = 14,
1460 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1461 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1462 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1463 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1464 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1465 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20,
1466 BAD_ALLOCATION_TYPE, // 0
1467 BAD_ALLOCATION_TYPE, // 1
1468 BAD_ALLOCATION_TYPE, // 2
1469 BAD_ALLOCATION_TYPE, // 3
1470 STATIC_BYTE , // T_BOOLEAN = 4,
1471 STATIC_SHORT, // T_CHAR = 5,
1472 STATIC_WORD, // T_FLOAT = 6,
1473 STATIC_DOUBLE, // T_DOUBLE = 7,
1474 STATIC_BYTE, // T_BYTE = 8,
1475 STATIC_SHORT, // T_SHORT = 9,
1476 STATIC_WORD, // T_INT = 10,
1477 STATIC_DOUBLE, // T_LONG = 11,
1478 STATIC_OOP, // T_OBJECT = 12,
1479 STATIC_OOP, // T_ARRAY = 13,
1480 STATIC_OOP, // T_INLINE_TYPE = 14,
1481 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1482 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1483 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1484 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1485 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1486 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20
1487 };
1488
1489 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type, bool is_inline_type) {
1490 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1491 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1492 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1493 if (is_inline_type) {
1494 result = is_static ? STATIC_INLINE : NONSTATIC_INLINE;
1495 }
1496 return result;
1497 }
1498
1499 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1500 public:
1501 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1502
1503 FieldAllocationCount() {
1504 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1505 count[i] = 0;
1506 }
1507 }
1508
1509 void update(bool is_static, BasicType type, bool is_inline_type) {
1510 FieldAllocationType atype = basic_type_to_atype(is_static, type, is_inline_type);
1511 if (atype != BAD_ALLOCATION_TYPE) {
1512 // Make sure there is no overflow with injected fields.
1513 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1514 count[atype]++;
1515 }
1516 }
1517 };
1518
1519 // Side-effects: populates the _fields, _fields_annotations,
1520 // _fields_type_annotations fields
1521 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1522 bool is_interface,
1523 bool is_inline_type,
1524 FieldAllocationCount* const fac,
1525 ConstantPool* cp,
1526 const int cp_size,
1527 u2* const java_fields_count_ptr,
1528 TRAPS) {
1529
1530 assert(cfs != NULL, "invariant");
1531 assert(fac != NULL, "invariant");
1532 assert(cp != NULL, "invariant");
1533 assert(java_fields_count_ptr != NULL, "invariant");
1534
1535 assert(NULL == _fields, "invariant");
1536 assert(NULL == _fields_annotations, "invariant");
1537 assert(NULL == _fields_type_annotations, "invariant");
1538
1539 cfs->guarantee_more(2, CHECK); // length
1540 const u2 length = cfs->get_u2_fast();
1541 *java_fields_count_ptr = length;
1542
1543 int num_injected = 0;
1544 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1545 &num_injected);
1546
1547 // two more slots are required for inline classes:
1548 // one for the static field with a reference to the pre-allocated default value
1549 // one for the field the JVM injects when detecting an empty inline class
1550 const int total_fields = length + num_injected + (is_inline_type ? 2 : 0);
1551
1552 // The field array starts with tuples of shorts
1553 // [access, name index, sig index, initial value index, byte offset].
1554 // A generic signature slot only exists for field with generic
1555 // signature attribute. And the access flag is set with
1556 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1557 // signature slots are at the end of the field array and after all
1558 // other fields data.
1559 //
1560 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1561 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1562 // ...
1563 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1564 // [generic signature index]
1565 // [generic signature index]
1566 // ...
1567 //
1568 // Allocate a temporary resource array for field data. For each field,
1569 // a slot is reserved in the temporary array for the generic signature
1570 // index. After parsing all fields, the data are copied to a permanent
1571 // array and any unused slots will be discarded.
1572 ResourceMark rm(THREAD);
1573 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1574 u2,
1575 total_fields * (FieldInfo::field_slots + 1));
1576
1577 // The generic signature slots start after all other fields' data.
1578 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1579 int num_generic_signature = 0;
1580 int instance_fields_count = 0;
1581 for (int n = 0; n < length; n++) {
1582 // access_flags, name_index, descriptor_index, attributes_count
1583 cfs->guarantee_more(8, CHECK);
1584
1585 jint recognized_modifiers = JVM_RECOGNIZED_FIELD_MODIFIERS;
1586
1587 const jint flags = cfs->get_u2_fast() & recognized_modifiers;
1588 verify_legal_field_modifiers(flags, is_interface, is_inline_type, CHECK);
1589 AccessFlags access_flags;
1590 access_flags.set_flags(flags);
1591
1592 const u2 name_index = cfs->get_u2_fast();
1593 check_property(valid_symbol_at(name_index),
1594 "Invalid constant pool index %u for field name in class file %s",
1595 name_index, CHECK);
1596 const Symbol* const name = cp->symbol_at(name_index);
1597 verify_legal_field_name(name, CHECK);
1598
1599 const u2 signature_index = cfs->get_u2_fast();
1600 check_property(valid_symbol_at(signature_index),
1601 "Invalid constant pool index %u for field signature in class file %s",
1602 signature_index, CHECK);
1603 const Symbol* const sig = cp->symbol_at(signature_index);
1604 verify_legal_field_signature(name, sig, CHECK);
1605 if (!access_flags.is_static()) instance_fields_count++;
1606
1607 u2 constantvalue_index = 0;
1608 bool is_synthetic = false;
1609 u2 generic_signature_index = 0;
1610 const bool is_static = access_flags.is_static();
1611 FieldAnnotationCollector parsed_annotations(_loader_data);
1612
1613 const u2 attributes_count = cfs->get_u2_fast();
1614 if (attributes_count > 0) {
1615 parse_field_attributes(cfs,
1616 attributes_count,
1617 is_static,
1618 signature_index,
1619 &constantvalue_index,
1620 &is_synthetic,
1621 &generic_signature_index,
1622 &parsed_annotations,
1623 CHECK);
1624
1625 if (parsed_annotations.field_annotations() != NULL) {
1626 if (_fields_annotations == NULL) {
1627 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1628 _loader_data, length, NULL,
1629 CHECK);
1630 }
1631 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1632 parsed_annotations.set_field_annotations(NULL);
1633 }
1634 if (parsed_annotations.field_type_annotations() != NULL) {
1635 if (_fields_type_annotations == NULL) {
1636 _fields_type_annotations =
1637 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1638 length,
1639 NULL,
1640 CHECK);
1641 }
1642 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1643 parsed_annotations.set_field_type_annotations(NULL);
1644 }
1645
1646 if (is_synthetic) {
1647 access_flags.set_is_synthetic();
1648 }
1649 if (generic_signature_index != 0) {
1650 access_flags.set_field_has_generic_signature();
1651 fa[generic_signature_slot] = generic_signature_index;
1652 generic_signature_slot ++;
1653 num_generic_signature ++;
1654 }
1655 }
1656
1657 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1658 field->initialize(access_flags.as_short(),
1659 name_index,
1660 signature_index,
1661 constantvalue_index);
1662 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1663
1664 // Update FieldAllocationCount for this kind of field
1665 fac->update(is_static, type, type == T_INLINE_TYPE);
1666
1667 // After field is initialized with type, we can augment it with aux info
1668 if (parsed_annotations.has_any_annotations()) {
1669 parsed_annotations.apply_to(field);
1670 if (field->is_contended()) {
1671 _has_contended_fields = true;
1672 }
1673 }
1674 }
1675
1676 int index = length;
1677 if (num_injected != 0) {
1678 for (int n = 0; n < num_injected; n++) {
1679 // Check for duplicates
1680 if (injected[n].may_be_java) {
1681 const Symbol* const name = injected[n].name();
1682 const Symbol* const signature = injected[n].signature();
1683 bool duplicate = false;
1684 for (int i = 0; i < length; i++) {
1685 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1686 if (name == cp->symbol_at(f->name_index()) &&
1687 signature == cp->symbol_at(f->signature_index())) {
1688 // Symbol is desclared in Java so skip this one
1689 duplicate = true;
1690 break;
1691 }
1692 }
1693 if (duplicate) {
1694 // These will be removed from the field array at the end
1695 continue;
1696 }
1697 }
1698
1699 // Injected field
1700 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1701 field->initialize((u2)JVM_ACC_FIELD_INTERNAL,
1702 (u2)(injected[n].name_index),
1703 (u2)(injected[n].signature_index),
1704 0);
1705
1706 const BasicType type = Signature::basic_type(injected[n].signature());
1707
1708 // Update FieldAllocationCount for this kind of field
1709 fac->update(false, type, false);
1710 index++;
1711 }
1712 }
1713
1714 if (is_inline_type) {
1715 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1716 field->initialize(JVM_ACC_FIELD_INTERNAL | JVM_ACC_STATIC,
1717 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(default_value_name)),
1718 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(object_signature)),
1719 0);
1720 const BasicType type = Signature::basic_type(vmSymbols::object_signature());
1721 fac->update(true, type, false);
1722 index++;
1723 }
1724
1725 if (is_inline_type && instance_fields_count == 0) {
1726 _is_empty_inline_type = true;
1727 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1728 field->initialize(JVM_ACC_FIELD_INTERNAL,
1729 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(empty_marker_name)),
1730 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(byte_signature)),
1731 0);
1732 const BasicType type = Signature::basic_type(vmSymbols::byte_signature());
1733 fac->update(false, type, false);
1734 index++;
1735 }
1736
1737 if (instance_fields_count > 0) {
1738 _has_nonstatic_fields = true;
1739 }
1740
1741 assert(NULL == _fields, "invariant");
1742
1743 _fields =
1744 MetadataFactory::new_array<u2>(_loader_data,
1745 index * FieldInfo::field_slots + num_generic_signature,
1746 CHECK);
1747 // Sometimes injected fields already exist in the Java source so
1748 // the fields array could be too long. In that case the
1749 // fields array is trimed. Also unused slots that were reserved
1750 // for generic signature indexes are discarded.
1751 {
1752 int i = 0;
1753 for (; i < index * FieldInfo::field_slots; i++) {
1754 _fields->at_put(i, fa[i]);
1755 }
1756 for (int j = total_fields * FieldInfo::field_slots;
1757 j < generic_signature_slot; j++) {
1758 _fields->at_put(i++, fa[j]);
1759 }
1760 assert(_fields->length() == i, "");
1761 }
1762
1763 if (_need_verify && length > 1) {
1764 // Check duplicated fields
1765 ResourceMark rm(THREAD);
1766 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1767 THREAD, NameSigHash*, HASH_ROW_SIZE);
1768 initialize_hashtable(names_and_sigs);
1769 bool dup = false;
1770 const Symbol* name = NULL;
1771 const Symbol* sig = NULL;
1772 {
1773 debug_only(NoSafepointVerifier nsv;)
1774 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1775 name = fs.name();
1776 sig = fs.signature();
1777 // If no duplicates, add name/signature in hashtable names_and_sigs.
1778 if (!put_after_lookup(name, sig, names_and_sigs)) {
1779 dup = true;
1780 break;
1781 }
1782 }
1783 }
1784 if (dup) {
1785 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1786 name->as_C_string(), sig->as_klass_external_name(), THREAD);
1787 }
1788 }
1789 }
1790
1791
1792 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1793 u4 code_length,
1794 u4 exception_table_length,
1795 TRAPS) {
1796 assert(cfs != NULL, "invariant");
1797
1798 const unsafe_u2* const exception_table_start = cfs->current();
1799 assert(exception_table_start != NULL, "null exception table");
1800
1801 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1802 // end_pc,
1803 // handler_pc,
1804 // catch_type_index
1805
1806 // Will check legal target after parsing code array in verifier.
1807 if (_need_verify) {
1808 for (unsigned int i = 0; i < exception_table_length; i++) {
1809 const u2 start_pc = cfs->get_u2_fast();
1810 const u2 end_pc = cfs->get_u2_fast();
1811 const u2 handler_pc = cfs->get_u2_fast();
1812 const u2 catch_type_index = cfs->get_u2_fast();
1813 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1814 "Illegal exception table range in class file %s",
1815 CHECK_NULL);
1816 guarantee_property(handler_pc < code_length,
1817 "Illegal exception table handler in class file %s",
1818 CHECK_NULL);
1819 if (catch_type_index != 0) {
1820 guarantee_property(valid_klass_reference_at(catch_type_index),
1821 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1822 }
1823 }
1824 } else {
1825 cfs->skip_u2_fast(exception_table_length * 4);
1826 }
1827 return exception_table_start;
1828 }
1829
1830 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1831 u4 code_length,
1832 CompressedLineNumberWriteStream**const write_stream,
1833 TRAPS) {
1834
1835 const ClassFileStream* const cfs = _stream;
1836 unsigned int num_entries = cfs->get_u2(CHECK);
1837
1838 // Each entry is a u2 start_pc, and a u2 line_number
1839 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1840
1841 // Verify line number attribute and table length
1842 check_property(
1843 code_attribute_length == sizeof(u2) + length_in_bytes,
1844 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1845
1846 cfs->guarantee_more(length_in_bytes, CHECK);
1847
1848 if ((*write_stream) == NULL) {
1849 if (length_in_bytes > fixed_buffer_size) {
1850 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1851 } else {
1852 (*write_stream) = new CompressedLineNumberWriteStream(
1853 _linenumbertable_buffer, fixed_buffer_size);
1854 }
1855 }
1856
1857 while (num_entries-- > 0) {
1858 const u2 bci = cfs->get_u2_fast(); // start_pc
1859 const u2 line = cfs->get_u2_fast(); // line_number
1860 guarantee_property(bci < code_length,
1861 "Invalid pc in LineNumberTable in class file %s", CHECK);
1862 (*write_stream)->write_pair(bci, line);
1863 }
1864 }
1865
1866
1867 class LVT_Hash : public AllStatic {
1868 public:
1869
1870 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1871 /*
1872 * 3-tuple start_bci/length/slot has to be unique key,
1873 * so the following comparison seems to be redundant:
1874 * && elem->name_cp_index == entry->_elem->name_cp_index
1875 */
1876 return (e0.start_bci == e1.start_bci &&
1877 e0.length == e1.length &&
1878 e0.name_cp_index == e1.name_cp_index &&
1879 e0.slot == e1.slot);
1880 }
1881
1882 static unsigned int hash(LocalVariableTableElement const& e0) {
1883 unsigned int raw_hash = e0.start_bci;
1884
1885 raw_hash = e0.length + raw_hash * 37;
1886 raw_hash = e0.name_cp_index + raw_hash * 37;
1887 raw_hash = e0.slot + raw_hash * 37;
1888
1889 return raw_hash;
1890 }
1891 };
1892
1893
1894 // Class file LocalVariableTable elements.
1895 class Classfile_LVT_Element {
1896 public:
1897 u2 start_bci;
1898 u2 length;
1899 u2 name_cp_index;
1900 u2 descriptor_cp_index;
1901 u2 slot;
1902 };
1903
1904 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1905 LocalVariableTableElement* const lvt) {
1906 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1907 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1908 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1909 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1910 lvt->signature_cp_index = 0;
1911 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1912 }
1913
1914 // Function is used to parse both attributes:
1915 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1916 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1917 u4 code_length,
1918 u2 max_locals,
1919 u4 code_attribute_length,
1920 u2* const localvariable_table_length,
1921 bool isLVTT,
1922 TRAPS) {
1923 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1924 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1925 const unsigned int size =
1926 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1927
1928 const ConstantPool* const cp = _cp;
1929
1930 // Verify local variable table attribute has right length
1931 if (_need_verify) {
1932 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1933 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1934 }
1935
1936 const unsafe_u2* const localvariable_table_start = cfs->current();
1937 assert(localvariable_table_start != NULL, "null local variable table");
1938 if (!_need_verify) {
1939 cfs->skip_u2_fast(size);
1940 } else {
1941 cfs->guarantee_more(size * 2, CHECK_NULL);
1942 for(int i = 0; i < (*localvariable_table_length); i++) {
1943 const u2 start_pc = cfs->get_u2_fast();
1944 const u2 length = cfs->get_u2_fast();
1945 const u2 name_index = cfs->get_u2_fast();
1946 const u2 descriptor_index = cfs->get_u2_fast();
1947 const u2 index = cfs->get_u2_fast();
1948 // Assign to a u4 to avoid overflow
1949 const u4 end_pc = (u4)start_pc + (u4)length;
1950
1951 if (start_pc >= code_length) {
1952 classfile_parse_error(
1953 "Invalid start_pc %u in %s in class file %s",
1954 start_pc, tbl_name, THREAD);
1955 return NULL;
1956 }
1957 if (end_pc > code_length) {
1958 classfile_parse_error(
1959 "Invalid length %u in %s in class file %s",
1960 length, tbl_name, THREAD);
1961 return NULL;
1962 }
1963 const int cp_size = cp->length();
1964 guarantee_property(valid_symbol_at(name_index),
1965 "Name index %u in %s has bad constant type in class file %s",
1966 name_index, tbl_name, CHECK_NULL);
1967 guarantee_property(valid_symbol_at(descriptor_index),
1968 "Signature index %u in %s has bad constant type in class file %s",
1969 descriptor_index, tbl_name, CHECK_NULL);
1970
1971 const Symbol* const name = cp->symbol_at(name_index);
1972 const Symbol* const sig = cp->symbol_at(descriptor_index);
1973 verify_legal_field_name(name, CHECK_NULL);
1974 u2 extra_slot = 0;
1975 if (!isLVTT) {
1976 verify_legal_field_signature(name, sig, CHECK_NULL);
1977
1978 // 4894874: check special cases for double and long local variables
1979 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1980 sig == vmSymbols::type_signature(T_LONG)) {
1981 extra_slot = 1;
1982 }
1983 }
1984 guarantee_property((index + extra_slot) < max_locals,
1985 "Invalid index %u in %s in class file %s",
1986 index, tbl_name, CHECK_NULL);
1987 }
1988 }
1989 return localvariable_table_start;
1990 }
1991
1992 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1993 u4 code_attribute_length,
1994 bool need_verify,
1995 TRAPS) {
1996 assert(cfs != NULL, "invariant");
1997
1998 if (0 == code_attribute_length) {
1999 return NULL;
2000 }
2001
2002 const u1* const stackmap_table_start = cfs->current();
2003 assert(stackmap_table_start != NULL, "null stackmap table");
2004
2005 // check code_attribute_length first
2006 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2007
2008 if (!need_verify && !DumpSharedSpaces) {
2009 return NULL;
2010 }
2011 return stackmap_table_start;
2012 }
2013
2014 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2015 u2* const checked_exceptions_length,
2016 u4 method_attribute_length,
2017 TRAPS) {
2018 assert(cfs != NULL, "invariant");
2019 assert(checked_exceptions_length != NULL, "invariant");
2020
2021 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2022 *checked_exceptions_length = cfs->get_u2_fast();
2023 const unsigned int size =
2024 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2025 const unsafe_u2* const checked_exceptions_start = cfs->current();
2026 assert(checked_exceptions_start != NULL, "null checked exceptions");
2027 if (!_need_verify) {
2028 cfs->skip_u2_fast(size);
2029 } else {
2030 // Verify each value in the checked exception table
2031 u2 checked_exception;
2032 const u2 len = *checked_exceptions_length;
2033 cfs->guarantee_more(2 * len, CHECK_NULL);
2034 for (int i = 0; i < len; i++) {
2035 checked_exception = cfs->get_u2_fast();
2036 check_property(
2037 valid_klass_reference_at(checked_exception),
2038 "Exception name has bad type at constant pool %u in class file %s",
2039 checked_exception, CHECK_NULL);
2040 }
2041 }
2042 // check exceptions attribute length
2043 if (_need_verify) {
2044 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2045 sizeof(u2) * size),
2046 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2047 }
2048 return checked_exceptions_start;
2049 }
2050
2051 void ClassFileParser::throwIllegalSignature(const char* type,
2052 const Symbol* name,
2053 const Symbol* sig,
2054 TRAPS) const {
2055 assert(name != NULL, "invariant");
2056 assert(sig != NULL, "invariant");
2057
2058 const char* class_note = "";
2059 if (is_inline_type() && name == vmSymbols::object_initializer_name()) {
2060 class_note = " (an inline class)";
2061 }
2062
2063 ResourceMark rm(THREAD);
2064 Exceptions::fthrow(THREAD_AND_LOCATION,
2065 vmSymbols::java_lang_ClassFormatError(),
2066 "%s \"%s\" in class %s%s has illegal signature \"%s\"", type,
2067 name->as_C_string(), _class_name->as_C_string(), class_note, sig->as_C_string());
2068 }
2069
2070 AnnotationCollector::ID
2071 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2072 const Symbol* name,
2073 const bool can_access_vm_annotations) {
2074 const vmSymbolID sid = vmSymbols::find_sid(name);
2075 // Privileged code can use all annotations. Other code silently drops some.
2076 const bool privileged = loader_data->is_boot_class_loader_data() ||
2077 loader_data->is_platform_class_loader_data() ||
2078 can_access_vm_annotations;
2079 switch (sid) {
2080 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2081 if (_location != _in_method) break; // only allow for methods
2082 if (!privileged) break; // only allow in privileged code
2083 return _method_CallerSensitive;
2084 }
2085 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2086 if (_location != _in_method) break; // only allow for methods
2087 if (!privileged) break; // only allow in privileged code
2088 return _method_ForceInline;
2089 }
2090 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2091 if (_location != _in_method) break; // only allow for methods
2092 if (!privileged) break; // only allow in privileged code
2093 return _method_DontInline;
2094 }
2095 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2096 if (_location != _in_method) break; // only allow for methods
2097 if (!privileged) break; // only allow in privileged code
2098 return _method_InjectedProfile;
2099 }
2100 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2101 if (_location != _in_method) break; // only allow for methods
2102 if (!privileged) break; // only allow in privileged code
2103 return _method_LambdaForm_Compiled;
2104 }
2105 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2106 if (_location != _in_method) break; // only allow for methods
2107 if (!privileged) break; // only allow in privileged code
2108 return _method_Hidden;
2109 }
2110 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
2111 if (_location != _in_method) break; // only allow for methods
2112 if (!privileged) break; // only allow in privileged code
2113 return _method_Scoped;
2114 }
2115 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
2116 if (_location != _in_method) break; // only allow for methods
2117 if (!privileged) break; // only allow in privileged code
2118 return _method_IntrinsicCandidate;
2119 }
2120 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2121 if (_location != _in_field) break; // only allow for fields
2122 if (!privileged) break; // only allow in privileged code
2123 return _field_Stable;
2124 }
2125 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2126 if (_location != _in_field && _location != _in_class) {
2127 break; // only allow for fields and classes
2128 }
2129 if (!EnableContended || (RestrictContended && !privileged)) {
2130 break; // honor privileges
2131 }
2132 return _jdk_internal_vm_annotation_Contended;
2133 }
2134 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2135 if (_location != _in_method) break; // only allow for methods
2136 if (RestrictReservedStack && !privileged) break; // honor privileges
2137 return _jdk_internal_vm_annotation_ReservedStackAccess;
2138 }
2139 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
2140 if (_location != _in_class) break; // only allow for classes
2141 if (!privileged) break; // only allow in priviledged code
2142 return _jdk_internal_ValueBased;
2143 }
2144 default: {
2145 break;
2146 }
2147 }
2148 return AnnotationCollector::_unknown;
2149 }
2150
2151 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2152 if (is_contended())
2153 f->set_contended_group(contended_group());
2154 if (is_stable())
2155 f->set_stable(true);
2156 }
2157
2158 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2159 // If there's an error deallocate metadata for field annotations
2160 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2161 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2162 }
2163
2164 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2165 if (has_annotation(_method_CallerSensitive))
2166 m->set_caller_sensitive(true);
2167 if (has_annotation(_method_ForceInline))
2168 m->set_force_inline(true);
2169 if (has_annotation(_method_DontInline))
2170 m->set_dont_inline(true);
2171 if (has_annotation(_method_InjectedProfile))
2172 m->set_has_injected_profile(true);
2173 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2174 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2175 if (has_annotation(_method_Hidden))
2176 m->set_hidden(true);
2177 if (has_annotation(_method_Scoped))
2178 m->set_scoped(true);
2179 if (has_annotation(_method_IntrinsicCandidate) && !m->is_synthetic())
2180 m->set_intrinsic_candidate(true);
2181 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2182 m->set_has_reserved_stack_access(true);
2183 }
2184
2185 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2186 assert(ik != NULL, "invariant");
2187 if (has_annotation(_jdk_internal_vm_annotation_Contended)) {
2188 ik->set_is_contended(is_contended());
2189 }
2190 if (has_annotation(_jdk_internal_ValueBased)) {
2191 ik->set_has_value_based_class_annotation();
2192 if (DiagnoseSyncOnValueBasedClasses) {
2193 ik->set_is_value_based();
2194 }
2195 }
2196 }
2197
2198 #define MAX_ARGS_SIZE 255
2199 #define MAX_CODE_SIZE 65535
2200 #define INITIAL_MAX_LVT_NUMBER 256
2201
2202 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2203 *
2204 * Rules for LVT's and LVTT's are:
2205 * - There can be any number of LVT's and LVTT's.
2206 * - If there are n LVT's, it is the same as if there was just
2207 * one LVT containing all the entries from the n LVT's.
2208 * - There may be no more than one LVT entry per local variable.
2209 * Two LVT entries are 'equal' if these fields are the same:
2210 * start_pc, length, name, slot
2211 * - There may be no more than one LVTT entry per each LVT entry.
2212 * Each LVTT entry has to match some LVT entry.
2213 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2214 */
2215 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2216 int lvt_cnt,
2217 u2* const localvariable_table_length,
2218 const unsafe_u2** const localvariable_table_start,
2219 int lvtt_cnt,
2220 u2* const localvariable_type_table_length,
2221 const unsafe_u2** const localvariable_type_table_start,
2222 TRAPS) {
2223
2224 ResourceMark rm(THREAD);
2225
2226 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2227 256, ResourceObj::RESOURCE_AREA, mtInternal,
2228 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2229
2230 LVT_HashTable* const table = new LVT_HashTable();
2231
2232 // To fill LocalVariableTable in
2233 const Classfile_LVT_Element* cf_lvt;
2234 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2235
2236 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2237 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2238 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2239 copy_lvt_element(&cf_lvt[idx], lvt);
2240 // If no duplicates, add LVT elem in hashtable.
2241 if (table->put(*lvt, lvt) == false
2242 && _need_verify
2243 && _major_version >= JAVA_1_5_VERSION) {
2244 classfile_parse_error("Duplicated LocalVariableTable attribute "
2245 "entry for '%s' in class file %s",
2246 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2247 THREAD);
2248 return;
2249 }
2250 }
2251 }
2252
2253 // To merge LocalVariableTable and LocalVariableTypeTable
2254 const Classfile_LVT_Element* cf_lvtt;
2255 LocalVariableTableElement lvtt_elem;
2256
2257 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2258 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2259 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2260 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2261 LocalVariableTableElement** entry = table->get(lvtt_elem);
2262 if (entry == NULL) {
2263 if (_need_verify) {
2264 classfile_parse_error("LVTT entry for '%s' in class file %s "
2265 "does not match any LVT entry",
2266 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2267 THREAD);
2268 return;
2269 }
2270 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2271 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2272 "entry for '%s' in class file %s",
2273 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2274 THREAD);
2275 return;
2276 } else {
2277 // to add generic signatures into LocalVariableTable
2278 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2279 }
2280 }
2281 }
2282 }
2283
2284
2285 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2286 const u1* runtime_visible_annotations,
2287 int runtime_visible_annotations_length,
2288 const u1* runtime_invisible_annotations,
2289 int runtime_invisible_annotations_length,
2290 const u1* runtime_visible_parameter_annotations,
2291 int runtime_visible_parameter_annotations_length,
2292 const u1* runtime_invisible_parameter_annotations,
2293 int runtime_invisible_parameter_annotations_length,
2294 const u1* runtime_visible_type_annotations,
2295 int runtime_visible_type_annotations_length,
2296 const u1* runtime_invisible_type_annotations,
2297 int runtime_invisible_type_annotations_length,
2298 const u1* annotation_default,
2299 int annotation_default_length,
2300 TRAPS) {
2301
2302 AnnotationArray* a;
2303
2304 if (runtime_visible_annotations_length +
2305 runtime_invisible_annotations_length > 0) {
2306 a = assemble_annotations(runtime_visible_annotations,
2307 runtime_visible_annotations_length,
2308 runtime_invisible_annotations,
2309 runtime_invisible_annotations_length,
2310 CHECK);
2311 cm->set_method_annotations(a);
2312 }
2313
2314 if (runtime_visible_parameter_annotations_length +
2315 runtime_invisible_parameter_annotations_length > 0) {
2316 a = assemble_annotations(runtime_visible_parameter_annotations,
2317 runtime_visible_parameter_annotations_length,
2318 runtime_invisible_parameter_annotations,
2319 runtime_invisible_parameter_annotations_length,
2320 CHECK);
2321 cm->set_parameter_annotations(a);
2322 }
2323
2324 if (annotation_default_length > 0) {
2325 a = assemble_annotations(annotation_default,
2326 annotation_default_length,
2327 NULL,
2328 0,
2329 CHECK);
2330 cm->set_default_annotations(a);
2331 }
2332
2333 if (runtime_visible_type_annotations_length +
2334 runtime_invisible_type_annotations_length > 0) {
2335 a = assemble_annotations(runtime_visible_type_annotations,
2336 runtime_visible_type_annotations_length,
2337 runtime_invisible_type_annotations,
2338 runtime_invisible_type_annotations_length,
2339 CHECK);
2340 cm->set_type_annotations(a);
2341 }
2342 }
2343
2344
2345 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2346 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2347 // Method* to save footprint, so we only know the size of the resulting Method* when the
2348 // entire method attribute is parsed.
2349 //
2350 // The promoted_flags parameter is used to pass relevant access_flags
2351 // from the method back up to the containing klass. These flag values
2352 // are added to klass's access_flags.
2353
2354 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2355 bool is_interface,
2356 bool is_inline_type,
2357 const ConstantPool* cp,
2358 AccessFlags* const promoted_flags,
2359 TRAPS) {
2360 assert(cfs != NULL, "invariant");
2361 assert(cp != NULL, "invariant");
2362 assert(promoted_flags != NULL, "invariant");
2363
2364 ResourceMark rm(THREAD);
2365 // Parse fixed parts:
2366 // access_flags, name_index, descriptor_index, attributes_count
2367 cfs->guarantee_more(8, CHECK_NULL);
2368
2369 int flags = cfs->get_u2_fast();
2370 const u2 name_index = cfs->get_u2_fast();
2371 const int cp_size = cp->length();
2372 check_property(
2373 valid_symbol_at(name_index),
2374 "Illegal constant pool index %u for method name in class file %s",
2375 name_index, CHECK_NULL);
2376 const Symbol* const name = cp->symbol_at(name_index);
2377 verify_legal_method_name(name, CHECK_NULL);
2378
2379 const u2 signature_index = cfs->get_u2_fast();
2380 guarantee_property(
2381 valid_symbol_at(signature_index),
2382 "Illegal constant pool index %u for method signature in class file %s",
2383 signature_index, CHECK_NULL);
2384 const Symbol* const signature = cp->symbol_at(signature_index);
2385
2386 if (name == vmSymbols::class_initializer_name()) {
2387 // We ignore the other access flags for a valid class initializer.
2388 // (JVM Spec 2nd ed., chapter 4.6)
2389 if (_major_version < 51) { // backward compatibility
2390 flags = JVM_ACC_STATIC;
2391 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2392 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2393 } else {
2394 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2395 return NULL;
2396 }
2397 } else {
2398 verify_legal_method_modifiers(flags, is_interface, is_inline_type, name, CHECK_NULL);
2399 }
2400
2401 if (name == vmSymbols::object_initializer_name()) {
2402 if (is_interface) {
2403 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2404 return NULL;
2405 } else if (!is_inline_type && signature->is_void_method_signature()) {
2406 // OK, a constructor
2407 } else if (is_inline_type && !signature->is_void_method_signature()) {
2408 // also OK, a static factory, as long as the return value is good
2409 bool ok = false;
2410 SignatureStream ss((Symbol*) signature, true);
2411 while (!ss.at_return_type()) ss.next();
2412 if (ss.is_reference()) {
2413 Symbol* ret = ss.as_symbol();
2414 const Symbol* required = class_name();
2415 if (is_hidden()) {
2416 // The original class name in hidden classes gets changed. So using
2417 // the original name in the return type is no longer valid.
2418 // Note that expecting the return type for inline hidden class factory
2419 // methods to be java.lang.Object works around a JVM Spec issue for
2420 // hidden classes.
2421 required = vmSymbols::java_lang_Object();
2422 }
2423 ok = (ret == required);
2424 }
2425 if (!ok) {
2426 throwIllegalSignature("Method", name, signature, CHECK_0);
2427 }
2428 } else {
2429 // not OK, so throw the same error as in verify_legal_method_signature.
2430 throwIllegalSignature("Method", name, signature, CHECK_0);
2431 }
2432 // A declared <init> method must always be either a non-static
2433 // object constructor, with a void return, or else it must be a
2434 // static factory method, with a non-void return. No other
2435 // definition of <init> is possible.
2436 //
2437 // The verifier (in verify_invoke_instructions) will inspect the
2438 // signature of any attempt to invoke <init>, and ensures that it
2439 // returns non-void if and only if it is being invoked by
2440 // invokestatic, and void if and only if it is being invoked by
2441 // invokespecial.
2442 //
2443 // When a symbolic reference to <init> is resolved for a
2444 // particular invocation mode (special or static), the mode is
2445 // matched to the JVM_ACC_STATIC modifier of the <init> method.
2446 // Thus, it is impossible to statically invoke a constructor, and
2447 // impossible to "new + invokespecial" a static factory, either
2448 // through bytecode or through reflection.
2449 }
2450
2451 int args_size = -1; // only used when _need_verify is true
2452 if (_need_verify) {
2453 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2454 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2455 verify_legal_method_signature(name, signature, CHECK_NULL);
2456 if (args_size > MAX_ARGS_SIZE) {
2457 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2458 return NULL;
2459 }
2460 }
2461
2462 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2463
2464 // Default values for code and exceptions attribute elements
2465 u2 max_stack = 0;
2466 u2 max_locals = 0;
2467 u4 code_length = 0;
2468 const u1* code_start = 0;
2469 u2 exception_table_length = 0;
2470 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2471 Array<int>* exception_handlers = Universe::the_empty_int_array();
2472 u2 checked_exceptions_length = 0;
2473 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2474 CompressedLineNumberWriteStream* linenumber_table = NULL;
2475 int linenumber_table_length = 0;
2476 int total_lvt_length = 0;
2477 u2 lvt_cnt = 0;
2478 u2 lvtt_cnt = 0;
2479 bool lvt_allocated = false;
2480 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2481 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2482 u2* localvariable_table_length = NULL;
2483 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2484 u2* localvariable_type_table_length = NULL;
2485 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2486 int method_parameters_length = -1;
2487 const u1* method_parameters_data = NULL;
2488 bool method_parameters_seen = false;
2489 bool parsed_code_attribute = false;
2490 bool parsed_checked_exceptions_attribute = false;
2491 bool parsed_stackmap_attribute = false;
2492 // stackmap attribute - JDK1.5
2493 const u1* stackmap_data = NULL;
2494 int stackmap_data_length = 0;
2495 u2 generic_signature_index = 0;
2496 MethodAnnotationCollector parsed_annotations;
2497 const u1* runtime_visible_annotations = NULL;
2498 int runtime_visible_annotations_length = 0;
2499 const u1* runtime_invisible_annotations = NULL;
2500 int runtime_invisible_annotations_length = 0;
2501 const u1* runtime_visible_parameter_annotations = NULL;
2502 int runtime_visible_parameter_annotations_length = 0;
2503 const u1* runtime_invisible_parameter_annotations = NULL;
2504 int runtime_invisible_parameter_annotations_length = 0;
2505 const u1* runtime_visible_type_annotations = NULL;
2506 int runtime_visible_type_annotations_length = 0;
2507 const u1* runtime_invisible_type_annotations = NULL;
2508 int runtime_invisible_type_annotations_length = 0;
2509 bool runtime_invisible_annotations_exists = false;
2510 bool runtime_invisible_type_annotations_exists = false;
2511 bool runtime_invisible_parameter_annotations_exists = false;
2512 const u1* annotation_default = NULL;
2513 int annotation_default_length = 0;
2514
2515 // Parse code and exceptions attribute
2516 u2 method_attributes_count = cfs->get_u2_fast();
2517 while (method_attributes_count--) {
2518 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2519 const u2 method_attribute_name_index = cfs->get_u2_fast();
2520 const u4 method_attribute_length = cfs->get_u4_fast();
2521 check_property(
2522 valid_symbol_at(method_attribute_name_index),
2523 "Invalid method attribute name index %u in class file %s",
2524 method_attribute_name_index, CHECK_NULL);
2525
2526 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2527 if (method_attribute_name == vmSymbols::tag_code()) {
2528 // Parse Code attribute
2529 if (_need_verify) {
2530 guarantee_property(
2531 !access_flags.is_native() && !access_flags.is_abstract(),
2532 "Code attribute in native or abstract methods in class file %s",
2533 CHECK_NULL);
2534 }
2535 if (parsed_code_attribute) {
2536 classfile_parse_error("Multiple Code attributes in class file %s",
2537 THREAD);
2538 return NULL;
2539 }
2540 parsed_code_attribute = true;
2541
2542 // Stack size, locals size, and code size
2543 cfs->guarantee_more(8, CHECK_NULL);
2544 max_stack = cfs->get_u2_fast();
2545 max_locals = cfs->get_u2_fast();
2546 code_length = cfs->get_u4_fast();
2547 if (_need_verify) {
2548 guarantee_property(args_size <= max_locals,
2549 "Arguments can't fit into locals in class file %s",
2550 CHECK_NULL);
2551 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2552 "Invalid method Code length %u in class file %s",
2553 code_length, CHECK_NULL);
2554 }
2555 // Code pointer
2556 code_start = cfs->current();
2557 assert(code_start != NULL, "null code start");
2558 cfs->guarantee_more(code_length, CHECK_NULL);
2559 cfs->skip_u1_fast(code_length);
2560
2561 // Exception handler table
2562 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2563 exception_table_length = cfs->get_u2_fast();
2564 if (exception_table_length > 0) {
2565 exception_table_start = parse_exception_table(cfs,
2566 code_length,
2567 exception_table_length,
2568 CHECK_NULL);
2569 }
2570
2571 // Parse additional attributes in code attribute
2572 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2573 u2 code_attributes_count = cfs->get_u2_fast();
2574
2575 unsigned int calculated_attribute_length = 0;
2576
2577 calculated_attribute_length =
2578 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2579 calculated_attribute_length +=
2580 code_length +
2581 sizeof(exception_table_length) +
2582 sizeof(code_attributes_count) +
2583 exception_table_length *
2584 ( sizeof(u2) + // start_pc
2585 sizeof(u2) + // end_pc
2586 sizeof(u2) + // handler_pc
2587 sizeof(u2) ); // catch_type_index
2588
2589 while (code_attributes_count--) {
2590 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2591 const u2 code_attribute_name_index = cfs->get_u2_fast();
2592 const u4 code_attribute_length = cfs->get_u4_fast();
2593 calculated_attribute_length += code_attribute_length +
2594 sizeof(code_attribute_name_index) +
2595 sizeof(code_attribute_length);
2596 check_property(valid_symbol_at(code_attribute_name_index),
2597 "Invalid code attribute name index %u in class file %s",
2598 code_attribute_name_index,
2599 CHECK_NULL);
2600 if (LoadLineNumberTables &&
2601 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2602 // Parse and compress line number table
2603 parse_linenumber_table(code_attribute_length,
2604 code_length,
2605 &linenumber_table,
2606 CHECK_NULL);
2607
2608 } else if (LoadLocalVariableTables &&
2609 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2610 // Parse local variable table
2611 if (!lvt_allocated) {
2612 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2613 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2614 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2615 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2616 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2617 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2618 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2619 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2620 lvt_allocated = true;
2621 }
2622 if (lvt_cnt == max_lvt_cnt) {
2623 max_lvt_cnt <<= 1;
2624 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2625 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2626 }
2627 localvariable_table_start[lvt_cnt] =
2628 parse_localvariable_table(cfs,
2629 code_length,
2630 max_locals,
2631 code_attribute_length,
2632 &localvariable_table_length[lvt_cnt],
2633 false, // is not LVTT
2634 CHECK_NULL);
2635 total_lvt_length += localvariable_table_length[lvt_cnt];
2636 lvt_cnt++;
2637 } else if (LoadLocalVariableTypeTables &&
2638 _major_version >= JAVA_1_5_VERSION &&
2639 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2640 if (!lvt_allocated) {
2641 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2642 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2643 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2644 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2645 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2646 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2647 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2648 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2649 lvt_allocated = true;
2650 }
2651 // Parse local variable type table
2652 if (lvtt_cnt == max_lvtt_cnt) {
2653 max_lvtt_cnt <<= 1;
2654 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2655 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2656 }
2657 localvariable_type_table_start[lvtt_cnt] =
2658 parse_localvariable_table(cfs,
2659 code_length,
2660 max_locals,
2661 code_attribute_length,
2662 &localvariable_type_table_length[lvtt_cnt],
2663 true, // is LVTT
2664 CHECK_NULL);
2665 lvtt_cnt++;
2666 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2667 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2668 // Stack map is only needed by the new verifier in JDK1.5.
2669 if (parsed_stackmap_attribute) {
2670 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2671 return NULL;
2672 }
2673 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2674 stackmap_data_length = code_attribute_length;
2675 parsed_stackmap_attribute = true;
2676 } else {
2677 // Skip unknown attributes
2678 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2679 }
2680 }
2681 // check method attribute length
2682 if (_need_verify) {
2683 guarantee_property(method_attribute_length == calculated_attribute_length,
2684 "Code segment has wrong length in class file %s",
2685 CHECK_NULL);
2686 }
2687 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2688 // Parse Exceptions attribute
2689 if (parsed_checked_exceptions_attribute) {
2690 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2691 THREAD);
2692 return NULL;
2693 }
2694 parsed_checked_exceptions_attribute = true;
2695 checked_exceptions_start =
2696 parse_checked_exceptions(cfs,
2697 &checked_exceptions_length,
2698 method_attribute_length,
2699 CHECK_NULL);
2700 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2701 // reject multiple method parameters
2702 if (method_parameters_seen) {
2703 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2704 THREAD);
2705 return NULL;
2706 }
2707 method_parameters_seen = true;
2708 method_parameters_length = cfs->get_u1_fast();
2709 const u2 real_length = (method_parameters_length * 4u) + 1u;
2710 if (method_attribute_length != real_length) {
2711 classfile_parse_error(
2712 "Invalid MethodParameters method attribute length %u in class file",
2713 method_attribute_length, THREAD);
2714 return NULL;
2715 }
2716 method_parameters_data = cfs->current();
2717 cfs->skip_u2_fast(method_parameters_length);
2718 cfs->skip_u2_fast(method_parameters_length);
2719 // ignore this attribute if it cannot be reflected
2720 if (!vmClasses::Parameter_klass_loaded())
2721 method_parameters_length = -1;
2722 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2723 if (method_attribute_length != 0) {
2724 classfile_parse_error(
2725 "Invalid Synthetic method attribute length %u in class file %s",
2726 method_attribute_length, THREAD);
2727 return NULL;
2728 }
2729 // Should we check that there hasn't already been a synthetic attribute?
2730 access_flags.set_is_synthetic();
2731 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2732 if (method_attribute_length != 0) {
2733 classfile_parse_error(
2734 "Invalid Deprecated method attribute length %u in class file %s",
2735 method_attribute_length, THREAD);
2736 return NULL;
2737 }
2738 } else if (_major_version >= JAVA_1_5_VERSION) {
2739 if (method_attribute_name == vmSymbols::tag_signature()) {
2740 if (generic_signature_index != 0) {
2741 classfile_parse_error(
2742 "Multiple Signature attributes for method in class file %s",
2743 THREAD);
2744 return NULL;
2745 }
2746 if (method_attribute_length != 2) {
2747 classfile_parse_error(
2748 "Invalid Signature attribute length %u in class file %s",
2749 method_attribute_length, THREAD);
2750 return NULL;
2751 }
2752 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2753 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2754 if (runtime_visible_annotations != NULL) {
2755 classfile_parse_error(
2756 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2757 THREAD);
2758 return NULL;
2759 }
2760 runtime_visible_annotations_length = method_attribute_length;
2761 runtime_visible_annotations = cfs->current();
2762 assert(runtime_visible_annotations != NULL, "null visible annotations");
2763 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2764 parse_annotations(cp,
2765 runtime_visible_annotations,
2766 runtime_visible_annotations_length,
2767 &parsed_annotations,
2768 _loader_data,
2769 _can_access_vm_annotations);
2770 cfs->skip_u1_fast(runtime_visible_annotations_length);
2771 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2772 if (runtime_invisible_annotations_exists) {
2773 classfile_parse_error(
2774 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2775 THREAD);
2776 return NULL;
2777 }
2778 runtime_invisible_annotations_exists = true;
2779 if (PreserveAllAnnotations) {
2780 runtime_invisible_annotations_length = method_attribute_length;
2781 runtime_invisible_annotations = cfs->current();
2782 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2783 }
2784 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2785 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2786 if (runtime_visible_parameter_annotations != NULL) {
2787 classfile_parse_error(
2788 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2789 THREAD);
2790 return NULL;
2791 }
2792 runtime_visible_parameter_annotations_length = method_attribute_length;
2793 runtime_visible_parameter_annotations = cfs->current();
2794 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2795 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2796 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2797 if (runtime_invisible_parameter_annotations_exists) {
2798 classfile_parse_error(
2799 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2800 THREAD);
2801 return NULL;
2802 }
2803 runtime_invisible_parameter_annotations_exists = true;
2804 if (PreserveAllAnnotations) {
2805 runtime_invisible_parameter_annotations_length = method_attribute_length;
2806 runtime_invisible_parameter_annotations = cfs->current();
2807 assert(runtime_invisible_parameter_annotations != NULL,
2808 "null invisible parameter annotations");
2809 }
2810 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2811 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2812 if (annotation_default != NULL) {
2813 classfile_parse_error(
2814 "Multiple AnnotationDefault attributes for method in class file %s",
2815 THREAD);
2816 return NULL;
2817 }
2818 annotation_default_length = method_attribute_length;
2819 annotation_default = cfs->current();
2820 assert(annotation_default != NULL, "null annotation default");
2821 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2822 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2823 if (runtime_visible_type_annotations != NULL) {
2824 classfile_parse_error(
2825 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2826 THREAD);
2827 return NULL;
2828 }
2829 runtime_visible_type_annotations_length = method_attribute_length;
2830 runtime_visible_type_annotations = cfs->current();
2831 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2832 // No need for the VM to parse Type annotations
2833 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2834 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2835 if (runtime_invisible_type_annotations_exists) {
2836 classfile_parse_error(
2837 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2838 THREAD);
2839 return NULL;
2840 } else {
2841 runtime_invisible_type_annotations_exists = true;
2842 }
2843 if (PreserveAllAnnotations) {
2844 runtime_invisible_type_annotations_length = method_attribute_length;
2845 runtime_invisible_type_annotations = cfs->current();
2846 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2847 }
2848 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2849 } else {
2850 // Skip unknown attributes
2851 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2852 }
2853 } else {
2854 // Skip unknown attributes
2855 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2856 }
2857 }
2858
2859 if (linenumber_table != NULL) {
2860 linenumber_table->write_terminator();
2861 linenumber_table_length = linenumber_table->position();
2862 }
2863
2864 // Make sure there's at least one Code attribute in non-native/non-abstract method
2865 if (_need_verify) {
2866 guarantee_property(access_flags.is_native() ||
2867 access_flags.is_abstract() ||
2868 parsed_code_attribute,
2869 "Absent Code attribute in method that is not native or abstract in class file %s",
2870 CHECK_NULL);
2871 }
2872
2873 // All sizing information for a Method* is finally available, now create it
2874 InlineTableSizes sizes(
2875 total_lvt_length,
2876 linenumber_table_length,
2877 exception_table_length,
2878 checked_exceptions_length,
2879 method_parameters_length,
2880 generic_signature_index,
2881 runtime_visible_annotations_length +
2882 runtime_invisible_annotations_length,
2883 runtime_visible_parameter_annotations_length +
2884 runtime_invisible_parameter_annotations_length,
2885 runtime_visible_type_annotations_length +
2886 runtime_invisible_type_annotations_length,
2887 annotation_default_length,
2888 0);
2889
2890 Method* const m = Method::allocate(_loader_data,
2891 code_length,
2892 access_flags,
2893 &sizes,
2894 ConstMethod::NORMAL,
2895 CHECK_NULL);
2896
2897 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2898
2899 // Fill in information from fixed part (access_flags already set)
2900 m->set_constants(_cp);
2901 m->set_name_index(name_index);
2902 m->set_signature_index(signature_index);
2903 m->compute_from_signature(cp->symbol_at(signature_index));
2904 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2905
2906 // Fill in code attribute information
2907 m->set_max_stack(max_stack);
2908 m->set_max_locals(max_locals);
2909 if (stackmap_data != NULL) {
2910 m->constMethod()->copy_stackmap_data(_loader_data,
2911 (u1*)stackmap_data,
2912 stackmap_data_length,
2913 CHECK_NULL);
2914 }
2915
2916 // Copy byte codes
2917 m->set_code((u1*)code_start);
2918
2919 // Copy line number table
2920 if (linenumber_table != NULL) {
2921 memcpy(m->compressed_linenumber_table(),
2922 linenumber_table->buffer(),
2923 linenumber_table_length);
2924 }
2925
2926 // Copy exception table
2927 if (exception_table_length > 0) {
2928 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2929 m->exception_table_start(),
2930 exception_table_length * sizeof(ExceptionTableElement),
2931 sizeof(u2));
2932 }
2933
2934 // Copy method parameters
2935 if (method_parameters_length > 0) {
2936 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2937 for (int i = 0; i < method_parameters_length; i++) {
2938 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2939 method_parameters_data += 2;
2940 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2941 method_parameters_data += 2;
2942 }
2943 }
2944
2945 // Copy checked exceptions
2946 if (checked_exceptions_length > 0) {
2947 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2948 m->checked_exceptions_start(),
2949 checked_exceptions_length * sizeof(CheckedExceptionElement),
2950 sizeof(u2));
2951 }
2952
2953 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2954 if (total_lvt_length > 0) {
2955 promoted_flags->set_has_localvariable_table();
2956 copy_localvariable_table(m->constMethod(),
2957 lvt_cnt,
2958 localvariable_table_length,
2959 localvariable_table_start,
2960 lvtt_cnt,
2961 localvariable_type_table_length,
2962 localvariable_type_table_start,
2963 CHECK_NULL);
2964 }
2965
2966 if (parsed_annotations.has_any_annotations())
2967 parsed_annotations.apply_to(methodHandle(THREAD, m));
2968
2969 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2970 m->set_hidden(true);
2971 }
2972
2973 // Copy annotations
2974 copy_method_annotations(m->constMethod(),
2975 runtime_visible_annotations,
2976 runtime_visible_annotations_length,
2977 runtime_invisible_annotations,
2978 runtime_invisible_annotations_length,
2979 runtime_visible_parameter_annotations,
2980 runtime_visible_parameter_annotations_length,
2981 runtime_invisible_parameter_annotations,
2982 runtime_invisible_parameter_annotations_length,
2983 runtime_visible_type_annotations,
2984 runtime_visible_type_annotations_length,
2985 runtime_invisible_type_annotations,
2986 runtime_invisible_type_annotations_length,
2987 annotation_default,
2988 annotation_default_length,
2989 CHECK_NULL);
2990
2991 if (name == vmSymbols::finalize_method_name() &&
2992 signature == vmSymbols::void_method_signature()) {
2993 if (m->is_empty_method()) {
2994 _has_empty_finalizer = true;
2995 } else {
2996 _has_finalizer = true;
2997 }
2998 }
2999 if (name == vmSymbols::object_initializer_name() &&
3000 signature == vmSymbols::void_method_signature() &&
3001 m->is_vanilla_constructor()) {
3002 _has_vanilla_constructor = true;
3003 }
3004
3005 NOT_PRODUCT(m->verify());
3006 return m;
3007 }
3008
3009
3010 // The promoted_flags parameter is used to pass relevant access_flags
3011 // from the methods back up to the containing klass. These flag values
3012 // are added to klass's access_flags.
3013 // Side-effects: populates the _methods field in the parser
3014 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
3015 bool is_interface,
3016 bool is_inline_type,
3017 AccessFlags* promoted_flags,
3018 bool* has_final_method,
3019 bool* declares_nonstatic_concrete_methods,
3020 TRAPS) {
3021 assert(cfs != NULL, "invariant");
3022 assert(promoted_flags != NULL, "invariant");
3023 assert(has_final_method != NULL, "invariant");
3024 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
3025
3026 assert(NULL == _methods, "invariant");
3027
3028 cfs->guarantee_more(2, CHECK); // length
3029 const u2 length = cfs->get_u2_fast();
3030 if (length == 0) {
3031 _methods = Universe::the_empty_method_array();
3032 } else {
3033 _methods = MetadataFactory::new_array<Method*>(_loader_data,
3034 length,
3035 NULL,
3036 CHECK);
3037
3038 for (int index = 0; index < length; index++) {
3039 Method* method = parse_method(cfs,
3040 is_interface,
3041 is_inline_type,
3042 _cp,
3043 promoted_flags,
3044 CHECK);
3045
3046 if (method->is_final()) {
3047 *has_final_method = true;
3048 }
3049 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3050 // used for interface initialization, and default method inheritance analysis
3051 if (is_interface && !(*declares_nonstatic_concrete_methods)
3052 && !method->is_abstract() && !method->is_static()) {
3053 *declares_nonstatic_concrete_methods = true;
3054 }
3055 _methods->at_put(index, method);
3056 }
3057
3058 if (_need_verify && length > 1) {
3059 // Check duplicated methods
3060 ResourceMark rm(THREAD);
3061 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3062 THREAD, NameSigHash*, HASH_ROW_SIZE);
3063 initialize_hashtable(names_and_sigs);
3064 bool dup = false;
3065 const Symbol* name = NULL;
3066 const Symbol* sig = NULL;
3067 {
3068 debug_only(NoSafepointVerifier nsv;)
3069 for (int i = 0; i < length; i++) {
3070 const Method* const m = _methods->at(i);
3071 name = m->name();
3072 sig = m->signature();
3073 // If no duplicates, add name/signature in hashtable names_and_sigs.
3074 if (!put_after_lookup(name, sig, names_and_sigs)) {
3075 dup = true;
3076 break;
3077 }
3078 }
3079 }
3080 if (dup) {
3081 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3082 name->as_C_string(), sig->as_klass_external_name(), THREAD);
3083 }
3084 }
3085 }
3086 }
3087
3088 static const intArray* sort_methods(Array<Method*>* methods) {
3089 const int length = methods->length();
3090 // If JVMTI original method ordering or sharing is enabled we have to
3091 // remember the original class file ordering.
3092 // We temporarily use the vtable_index field in the Method* to store the
3093 // class file index, so we can read in after calling qsort.
3094 // Put the method ordering in the shared archive.
3095 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3096 for (int index = 0; index < length; index++) {
3097 Method* const m = methods->at(index);
3098 assert(!m->valid_vtable_index(), "vtable index should not be set");
3099 m->set_vtable_index(index);
3100 }
3101 }
3102 // Sort method array by ascending method name (for faster lookups & vtable construction)
3103 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3104 Method::sort_methods(methods);
3105
3106 intArray* method_ordering = NULL;
3107 // If JVMTI original method ordering or sharing is enabled construct int
3108 // array remembering the original ordering
3109 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3110 method_ordering = new intArray(length, length, -1);
3111 for (int index = 0; index < length; index++) {
3112 Method* const m = methods->at(index);
3113 const int old_index = m->vtable_index();
3114 assert(old_index >= 0 && old_index < length, "invalid method index");
3115 method_ordering->at_put(index, old_index);
3116 m->set_vtable_index(Method::invalid_vtable_index);
3117 }
3118 }
3119 return method_ordering;
3120 }
3121
3122 // Parse generic_signature attribute for methods and fields
3123 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3124 TRAPS) {
3125 assert(cfs != NULL, "invariant");
3126
3127 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3128 const u2 generic_signature_index = cfs->get_u2_fast();
3129 check_property(
3130 valid_symbol_at(generic_signature_index),
3131 "Invalid Signature attribute at constant pool index %u in class file %s",
3132 generic_signature_index, CHECK_0);
3133 return generic_signature_index;
3134 }
3135
3136 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3137 TRAPS) {
3138
3139 assert(cfs != NULL, "invariant");
3140
3141 cfs->guarantee_more(2, CHECK); // sourcefile_index
3142 const u2 sourcefile_index = cfs->get_u2_fast();
3143 check_property(
3144 valid_symbol_at(sourcefile_index),
3145 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3146 sourcefile_index, CHECK);
3147 set_class_sourcefile_index(sourcefile_index);
3148 }
3149
3150 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3151 int length,
3152 TRAPS) {
3153 assert(cfs != NULL, "invariant");
3154
3155 const u1* const sde_buffer = cfs->current();
3156 assert(sde_buffer != NULL, "null sde buffer");
3157
3158 // Don't bother storing it if there is no way to retrieve it
3159 if (JvmtiExport::can_get_source_debug_extension()) {
3160 assert((length+1) > length, "Overflow checking");
3161 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3162 for (int i = 0; i < length; i++) {
3163 sde[i] = sde_buffer[i];
3164 }
3165 sde[length] = '\0';
3166 set_class_sde_buffer((const char*)sde, length);
3167 }
3168 // Got utf8 string, set stream position forward
3169 cfs->skip_u1(length, CHECK);
3170 }
3171
3172
3173 // Inner classes can be static, private or protected (classic VM does this)
3174 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3175 JVM_ACC_PRIVATE | \
3176 JVM_ACC_PROTECTED | \
3177 JVM_ACC_STATIC \
3178 )
3179
3180 // Find index of the InnerClasses entry for the specified inner_class_info_index.
3181 // Return -1 if none is found.
3182 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3183 Symbol* cp_klass_name = cp->klass_name_at(inner);
3184 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3185 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3186 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
3187 return idx;
3188 }
3189 }
3190 return -1;
3191 }
3192
3193 // Return the outer_class_info_index for the InnerClasses entry containing the
3194 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
3195 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3196 if (inner == 0) return -1;
3197 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
3198 if (idx == -1) return -1;
3199 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3200 return result;
3201 }
3202
3203 // Return true if circularity is found, false if no circularity is found.
3204 // Use Floyd's cycle finding algorithm.
3205 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
3206 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3207 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3208 while (fast != -1 && fast != 0) {
3209 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
3210 return true; // found a circularity
3211 }
3212 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3213 if (fast == -1) return false;
3214 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3215 if (fast == -1) return false;
3216 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
3217 assert(slow != -1, "sanity check");
3218 }
3219 return false;
3220 }
3221
3222 // Loop through each InnerClasses entry checking for circularities and duplications
3223 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
3224 // return true if a circularity or entries with duplicate inner_class_info_indexes
3225 // are found.
3226 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
3227 // Loop through each InnerClasses entry.
3228 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3229 // Return true if there are circular entries.
3230 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
3231 return true;
3232 }
3233 // Check if there are duplicate entries or entries with the same inner_class_info_index.
3234 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
3235 y += InstanceKlass::inner_class_next_offset) {
3236
3237 // To maintain compatibility, throw an exception if duplicate inner classes
3238 // entries are found.
3239 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
3240 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
3241 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
3242 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
3243 "Duplicate entry in InnerClasses attribute in class file %s",
3244 CHECK_(true));
3245 // Return true if there are two entries with the same inner_class_info_index.
3246 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
3247 return true;
3248 }
3249 }
3250 }
3251 return false;
3252 }
3253
3254 // Return number of classes in the inner classes attribute table
3255 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3256 const ConstantPool* cp,
3257 const u1* const inner_classes_attribute_start,
3258 bool parsed_enclosingmethod_attribute,
3259 u2 enclosing_method_class_index,
3260 u2 enclosing_method_method_index,
3261 TRAPS) {
3262 const u1* const current_mark = cfs->current();
3263 u2 length = 0;
3264 if (inner_classes_attribute_start != NULL) {
3265 cfs->set_current(inner_classes_attribute_start);
3266 cfs->guarantee_more(2, CHECK_0); // length
3267 length = cfs->get_u2_fast();
3268 }
3269
3270 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3271 // method data:
3272 // [inner_class_info_index,
3273 // outer_class_info_index,
3274 // inner_name_index,
3275 // inner_class_access_flags,
3276 // ...
3277 // enclosing_method_class_index,
3278 // enclosing_method_method_index]
3279 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3280 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3281 _inner_classes = inner_classes;
3282
3283 int index = 0;
3284 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3285 for (int n = 0; n < length; n++) {
3286 // Inner class index
3287 const u2 inner_class_info_index = cfs->get_u2_fast();
3288 check_property(
3289 valid_klass_reference_at(inner_class_info_index),
3290 "inner_class_info_index %u has bad constant type in class file %s",
3291 inner_class_info_index, CHECK_0);
3292 // Outer class index
3293 const u2 outer_class_info_index = cfs->get_u2_fast();
3294 check_property(
3295 outer_class_info_index == 0 ||
3296 valid_klass_reference_at(outer_class_info_index),
3297 "outer_class_info_index %u has bad constant type in class file %s",
3298 outer_class_info_index, CHECK_0);
3299
3300 if (outer_class_info_index != 0) {
3301 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
3302 char* bytes = (char*)outer_class_name->bytes();
3303 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
3304 "Outer class is an array class in class file %s", CHECK_0);
3305 }
3306 // Inner class name
3307 const u2 inner_name_index = cfs->get_u2_fast();
3308 check_property(
3309 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3310 "inner_name_index %u has bad constant type in class file %s",
3311 inner_name_index, CHECK_0);
3312 if (_need_verify) {
3313 guarantee_property(inner_class_info_index != outer_class_info_index,
3314 "Class is both outer and inner class in class file %s", CHECK_0);
3315 }
3316
3317 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3318 // JVM_ACC_MODULE is defined in JDK-9 and later.
3319 if (_major_version >= JAVA_9_VERSION) {
3320 recognized_modifiers |= JVM_ACC_MODULE;
3321 }
3322 // JVM_ACC_INLINE is defined for class file version 55 and later
3323 if (supports_inline_types()) {
3324 recognized_modifiers |= JVM_ACC_INLINE | JVM_ACC_VALUE;
3325 }
3326
3327 // Access flags
3328 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3329
3330 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3331 // Set abstract bit for old class files for backward compatibility
3332 flags |= JVM_ACC_ABSTRACT;
3333 }
3334 verify_legal_class_modifiers(flags, CHECK_0);
3335 AccessFlags inner_access_flags(flags);
3336
3337 inner_classes->at_put(index++, inner_class_info_index);
3338 inner_classes->at_put(index++, outer_class_info_index);
3339 inner_classes->at_put(index++, inner_name_index);
3340 inner_classes->at_put(index++, inner_access_flags.as_short());
3341 }
3342
3343 // 4347400: make sure there's no duplicate entry in the classes array
3344 // Also, check for circular entries.
3345 bool has_circularity = false;
3346 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3347 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3348 if (has_circularity) {
3349 // If circularity check failed then ignore InnerClasses attribute.
3350 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3351 index = 0;
3352 if (parsed_enclosingmethod_attribute) {
3353 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3354 _inner_classes = inner_classes;
3355 } else {
3356 _inner_classes = Universe::the_empty_short_array();
3357 }
3358 }
3359 }
3360 // Set EnclosingMethod class and method indexes.
3361 if (parsed_enclosingmethod_attribute) {
3362 inner_classes->at_put(index++, enclosing_method_class_index);
3363 inner_classes->at_put(index++, enclosing_method_method_index);
3364 }
3365 assert(index == size || has_circularity, "wrong size");
3366
3367 // Restore buffer's current position.
3368 cfs->set_current(current_mark);
3369
3370 return length;
3371 }
3372
3373 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3374 const u1* const nest_members_attribute_start,
3375 TRAPS) {
3376 const u1* const current_mark = cfs->current();
3377 u2 length = 0;
3378 if (nest_members_attribute_start != NULL) {
3379 cfs->set_current(nest_members_attribute_start);
3380 cfs->guarantee_more(2, CHECK_0); // length
3381 length = cfs->get_u2_fast();
3382 }
3383 const int size = length;
3384 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3385 _nest_members = nest_members;
3386
3387 int index = 0;
3388 cfs->guarantee_more(2 * length, CHECK_0);
3389 for (int n = 0; n < length; n++) {
3390 const u2 class_info_index = cfs->get_u2_fast();
3391 check_property(
3392 valid_klass_reference_at(class_info_index),
3393 "Nest member class_info_index %u has bad constant type in class file %s",
3394 class_info_index, CHECK_0);
3395 nest_members->at_put(index++, class_info_index);
3396 }
3397 assert(index == size, "wrong size");
3398
3399 // Restore buffer's current position.
3400 cfs->set_current(current_mark);
3401
3402 return length;
3403 }
3404
3405 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3406 const u1* const permitted_subclasses_attribute_start,
3407 TRAPS) {
3408 const u1* const current_mark = cfs->current();
3409 u2 length = 0;
3410 if (permitted_subclasses_attribute_start != NULL) {
3411 cfs->set_current(permitted_subclasses_attribute_start);
3412 cfs->guarantee_more(2, CHECK_0); // length
3413 length = cfs->get_u2_fast();
3414 }
3415 const int size = length;
3416 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3417 _permitted_subclasses = permitted_subclasses;
3418
3419 if (length > 0) {
3420 int index = 0;
3421 cfs->guarantee_more(2 * length, CHECK_0);
3422 for (int n = 0; n < length; n++) {
3423 const u2 class_info_index = cfs->get_u2_fast();
3424 check_property(
3425 valid_klass_reference_at(class_info_index),
3426 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3427 class_info_index, CHECK_0);
3428 permitted_subclasses->at_put(index++, class_info_index);
3429 }
3430 assert(index == size, "wrong size");
3431 }
3432
3433 // Restore buffer's current position.
3434 cfs->set_current(current_mark);
3435
3436 return length;
3437 }
3438
3439 // Record {
3440 // u2 attribute_name_index;
3441 // u4 attribute_length;
3442 // u2 components_count;
3443 // component_info components[components_count];
3444 // }
3445 // component_info {
3446 // u2 name_index;
3447 // u2 descriptor_index
3448 // u2 attributes_count;
3449 // attribute_info_attributes[attributes_count];
3450 // }
3451 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3452 const ConstantPool* cp,
3453 const u1* const record_attribute_start,
3454 TRAPS) {
3455 const u1* const current_mark = cfs->current();
3456 int components_count = 0;
3457 unsigned int calculate_attr_size = 0;
3458 if (record_attribute_start != NULL) {
3459 cfs->set_current(record_attribute_start);
3460 cfs->guarantee_more(2, CHECK_0); // num of components
3461 components_count = (int)cfs->get_u2_fast();
3462 calculate_attr_size = 2;
3463 }
3464
3465 Array<RecordComponent*>* const record_components =
3466 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, NULL, CHECK_0);
3467 _record_components = record_components;
3468
3469 for (int x = 0; x < components_count; x++) {
3470 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3471
3472 const u2 name_index = cfs->get_u2_fast();
3473 check_property(valid_symbol_at(name_index),
3474 "Invalid constant pool index %u for name in Record attribute in class file %s",
3475 name_index, CHECK_0);
3476 const Symbol* const name = cp->symbol_at(name_index);
3477 verify_legal_field_name(name, CHECK_0);
3478
3479 const u2 descriptor_index = cfs->get_u2_fast();
3480 check_property(valid_symbol_at(descriptor_index),
3481 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3482 descriptor_index, CHECK_0);
3483 const Symbol* const descr = cp->symbol_at(descriptor_index);
3484 verify_legal_field_signature(name, descr, CHECK_0);
3485
3486 const u2 attributes_count = cfs->get_u2_fast();
3487 calculate_attr_size += 6;
3488 u2 generic_sig_index = 0;
3489 const u1* runtime_visible_annotations = NULL;
3490 int runtime_visible_annotations_length = 0;
3491 const u1* runtime_invisible_annotations = NULL;
3492 int runtime_invisible_annotations_length = 0;
3493 bool runtime_invisible_annotations_exists = false;
3494 const u1* runtime_visible_type_annotations = NULL;
3495 int runtime_visible_type_annotations_length = 0;
3496 const u1* runtime_invisible_type_annotations = NULL;
3497 int runtime_invisible_type_annotations_length = 0;
3498 bool runtime_invisible_type_annotations_exists = false;
3499
3500 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3501 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3502 for (int y = 0; y < attributes_count; y++) {
3503 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3504 const u2 attribute_name_index = cfs->get_u2_fast();
3505 const u4 attribute_length = cfs->get_u4_fast();
3506 calculate_attr_size += 6;
3507 check_property(
3508 valid_symbol_at(attribute_name_index),
3509 "Invalid Record attribute name index %u in class file %s",
3510 attribute_name_index, CHECK_0);
3511
3512 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3513 if (attribute_name == vmSymbols::tag_signature()) {
3514 if (generic_sig_index != 0) {
3515 classfile_parse_error(
3516 "Multiple Signature attributes for Record component in class file %s",
3517 THREAD);
3518 return 0;
3519 }
3520 if (attribute_length != 2) {
3521 classfile_parse_error(
3522 "Invalid Signature attribute length %u in Record component in class file %s",
3523 attribute_length, THREAD);
3524 return 0;
3525 }
3526 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3527
3528 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3529 if (runtime_visible_annotations != NULL) {
3530 classfile_parse_error(
3531 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3532 return 0;
3533 }
3534 runtime_visible_annotations_length = attribute_length;
3535 runtime_visible_annotations = cfs->current();
3536
3537 assert(runtime_visible_annotations != NULL, "null record component visible annotation");
3538 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3539 cfs->skip_u1_fast(runtime_visible_annotations_length);
3540
3541 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3542 if (runtime_invisible_annotations_exists) {
3543 classfile_parse_error(
3544 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3545 return 0;
3546 }
3547 runtime_invisible_annotations_exists = true;
3548 if (PreserveAllAnnotations) {
3549 runtime_invisible_annotations_length = attribute_length;
3550 runtime_invisible_annotations = cfs->current();
3551 assert(runtime_invisible_annotations != NULL, "null record component invisible annotation");
3552 }
3553 cfs->skip_u1(attribute_length, CHECK_0);
3554
3555 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3556 if (runtime_visible_type_annotations != NULL) {
3557 classfile_parse_error(
3558 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3559 return 0;
3560 }
3561 runtime_visible_type_annotations_length = attribute_length;
3562 runtime_visible_type_annotations = cfs->current();
3563
3564 assert(runtime_visible_type_annotations != NULL, "null record component visible type annotation");
3565 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3566 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3567
3568 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3569 if (runtime_invisible_type_annotations_exists) {
3570 classfile_parse_error(
3571 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3572 return 0;
3573 }
3574 runtime_invisible_type_annotations_exists = true;
3575 if (PreserveAllAnnotations) {
3576 runtime_invisible_type_annotations_length = attribute_length;
3577 runtime_invisible_type_annotations = cfs->current();
3578 assert(runtime_invisible_type_annotations != NULL, "null record component invisible type annotation");
3579 }
3580 cfs->skip_u1(attribute_length, CHECK_0);
3581
3582 } else {
3583 // Skip unknown attributes
3584 cfs->skip_u1(attribute_length, CHECK_0);
3585 }
3586 calculate_attr_size += attribute_length;
3587 } // End of attributes For loop
3588
3589 AnnotationArray* annotations = assemble_annotations(runtime_visible_annotations,
3590 runtime_visible_annotations_length,
3591 runtime_invisible_annotations,
3592 runtime_invisible_annotations_length,
3593 CHECK_0);
3594 AnnotationArray* type_annotations = assemble_annotations(runtime_visible_type_annotations,
3595 runtime_visible_type_annotations_length,
3596 runtime_invisible_type_annotations,
3597 runtime_invisible_type_annotations_length,
3598 CHECK_0);
3599
3600 RecordComponent* record_component =
3601 RecordComponent::allocate(_loader_data, name_index, descriptor_index,
3602 attributes_count, generic_sig_index,
3603 annotations, type_annotations, CHECK_0);
3604 record_components->at_put(x, record_component);
3605 } // End of component processing loop
3606
3607 // Restore buffer's current position.
3608 cfs->set_current(current_mark);
3609 return calculate_attr_size;
3610 }
3611
3612 void ClassFileParser::parse_classfile_synthetic_attribute() {
3613 set_class_synthetic_flag(true);
3614 }
3615
3616 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3617 assert(cfs != NULL, "invariant");
3618
3619 const u2 signature_index = cfs->get_u2(CHECK);
3620 check_property(
3621 valid_symbol_at(signature_index),
3622 "Invalid constant pool index %u in Signature attribute in class file %s",
3623 signature_index, CHECK);
3624 set_class_generic_signature_index(signature_index);
3625 }
3626
3627 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3628 ConstantPool* cp,
3629 u4 attribute_byte_length,
3630 TRAPS) {
3631 assert(cfs != NULL, "invariant");
3632 assert(cp != NULL, "invariant");
3633
3634 const u1* const current_start = cfs->current();
3635
3636 guarantee_property(attribute_byte_length >= sizeof(u2),
3637 "Invalid BootstrapMethods attribute length %u in class file %s",
3638 attribute_byte_length,
3639 CHECK);
3640
3641 cfs->guarantee_more(attribute_byte_length, CHECK);
3642
3643 const int attribute_array_length = cfs->get_u2_fast();
3644
3645 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3646 "Short length on BootstrapMethods in class file %s",
3647 CHECK);
3648
3649
3650 // The attribute contains a counted array of counted tuples of shorts,
3651 // represending bootstrap specifiers:
3652 // length*{bootstrap_method_index, argument_count*{argument_index}}
3653 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3654 // operand_count = number of shorts in attr, except for leading length
3655
3656 // The attribute is copied into a short[] array.
3657 // The array begins with a series of short[2] pairs, one for each tuple.
3658 const int index_size = (attribute_array_length * 2);
3659
3660 Array<u2>* const operands =
3661 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3662
3663 // Eagerly assign operands so they will be deallocated with the constant
3664 // pool if there is an error.
3665 cp->set_operands(operands);
3666
3667 int operand_fill_index = index_size;
3668 const int cp_size = cp->length();
3669
3670 for (int n = 0; n < attribute_array_length; n++) {
3671 // Store a 32-bit offset into the header of the operand array.
3672 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3673
3674 // Read a bootstrap specifier.
3675 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3676 const u2 bootstrap_method_index = cfs->get_u2_fast();
3677 const u2 argument_count = cfs->get_u2_fast();
3678 check_property(
3679 valid_cp_range(bootstrap_method_index, cp_size) &&
3680 cp->tag_at(bootstrap_method_index).is_method_handle(),
3681 "bootstrap_method_index %u has bad constant type in class file %s",
3682 bootstrap_method_index,
3683 CHECK);
3684
3685 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3686 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3687 CHECK);
3688
3689 operands->at_put(operand_fill_index++, bootstrap_method_index);
3690 operands->at_put(operand_fill_index++, argument_count);
3691
3692 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3693 for (int j = 0; j < argument_count; j++) {
3694 const u2 argument_index = cfs->get_u2_fast();
3695 check_property(
3696 valid_cp_range(argument_index, cp_size) &&
3697 cp->tag_at(argument_index).is_loadable_constant(),
3698 "argument_index %u has bad constant type in class file %s",
3699 argument_index,
3700 CHECK);
3701 operands->at_put(operand_fill_index++, argument_index);
3702 }
3703 }
3704 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3705 "Bad length on BootstrapMethods in class file %s",
3706 CHECK);
3707 }
3708
3709 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3710 ConstantPool* cp,
3711 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3712 TRAPS) {
3713 assert(cfs != NULL, "invariant");
3714 assert(cp != NULL, "invariant");
3715 assert(parsed_annotations != NULL, "invariant");
3716
3717 // Set inner classes attribute to default sentinel
3718 _inner_classes = Universe::the_empty_short_array();
3719 // Set nest members attribute to default sentinel
3720 _nest_members = Universe::the_empty_short_array();
3721 // Set _permitted_subclasses attribute to default sentinel
3722 _permitted_subclasses = Universe::the_empty_short_array();
3723 cfs->guarantee_more(2, CHECK); // attributes_count
3724 u2 attributes_count = cfs->get_u2_fast();
3725 bool parsed_sourcefile_attribute = false;
3726 bool parsed_innerclasses_attribute = false;
3727 bool parsed_nest_members_attribute = false;
3728 bool parsed_permitted_subclasses_attribute = false;
3729 bool parsed_nest_host_attribute = false;
3730 bool parsed_record_attribute = false;
3731 bool parsed_enclosingmethod_attribute = false;
3732 bool parsed_bootstrap_methods_attribute = false;
3733 const u1* runtime_visible_annotations = NULL;
3734 int runtime_visible_annotations_length = 0;
3735 const u1* runtime_invisible_annotations = NULL;
3736 int runtime_invisible_annotations_length = 0;
3737 const u1* runtime_visible_type_annotations = NULL;
3738 int runtime_visible_type_annotations_length = 0;
3739 const u1* runtime_invisible_type_annotations = NULL;
3740 int runtime_invisible_type_annotations_length = 0;
3741 bool runtime_invisible_type_annotations_exists = false;
3742 bool runtime_invisible_annotations_exists = false;
3743 bool parsed_source_debug_ext_annotations_exist = false;
3744 const u1* inner_classes_attribute_start = NULL;
3745 u4 inner_classes_attribute_length = 0;
3746 u2 enclosing_method_class_index = 0;
3747 u2 enclosing_method_method_index = 0;
3748 const u1* nest_members_attribute_start = NULL;
3749 u4 nest_members_attribute_length = 0;
3750 const u1* record_attribute_start = NULL;
3751 u4 record_attribute_length = 0;
3752 const u1* permitted_subclasses_attribute_start = NULL;
3753 u4 permitted_subclasses_attribute_length = 0;
3754
3755 // Iterate over attributes
3756 while (attributes_count--) {
3757 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3758 const u2 attribute_name_index = cfs->get_u2_fast();
3759 const u4 attribute_length = cfs->get_u4_fast();
3760 check_property(
3761 valid_symbol_at(attribute_name_index),
3762 "Attribute name has bad constant pool index %u in class file %s",
3763 attribute_name_index, CHECK);
3764 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3765 if (tag == vmSymbols::tag_source_file()) {
3766 // Check for SourceFile tag
3767 if (_need_verify) {
3768 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3769 }
3770 if (parsed_sourcefile_attribute) {
3771 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3772 return;
3773 } else {
3774 parsed_sourcefile_attribute = true;
3775 }
3776 parse_classfile_sourcefile_attribute(cfs, CHECK);
3777 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3778 // Check for SourceDebugExtension tag
3779 if (parsed_source_debug_ext_annotations_exist) {
3780 classfile_parse_error(
3781 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3782 return;
3783 }
3784 parsed_source_debug_ext_annotations_exist = true;
3785 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3786 } else if (tag == vmSymbols::tag_inner_classes()) {
3787 // Check for InnerClasses tag
3788 if (parsed_innerclasses_attribute) {
3789 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3790 return;
3791 } else {
3792 parsed_innerclasses_attribute = true;
3793 }
3794 inner_classes_attribute_start = cfs->current();
3795 inner_classes_attribute_length = attribute_length;
3796 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3797 } else if (tag == vmSymbols::tag_synthetic()) {
3798 // Check for Synthetic tag
3799 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3800 if (attribute_length != 0) {
3801 classfile_parse_error(
3802 "Invalid Synthetic classfile attribute length %u in class file %s",
3803 attribute_length, THREAD);
3804 return;
3805 }
3806 parse_classfile_synthetic_attribute();
3807 } else if (tag == vmSymbols::tag_deprecated()) {
3808 // Check for Deprecated tag - 4276120
3809 if (attribute_length != 0) {
3810 classfile_parse_error(
3811 "Invalid Deprecated classfile attribute length %u in class file %s",
3812 attribute_length, THREAD);
3813 return;
3814 }
3815 } else if (_major_version >= JAVA_1_5_VERSION) {
3816 if (tag == vmSymbols::tag_signature()) {
3817 if (_generic_signature_index != 0) {
3818 classfile_parse_error(
3819 "Multiple Signature attributes in class file %s", THREAD);
3820 return;
3821 }
3822 if (attribute_length != 2) {
3823 classfile_parse_error(
3824 "Wrong Signature attribute length %u in class file %s",
3825 attribute_length, THREAD);
3826 return;
3827 }
3828 parse_classfile_signature_attribute(cfs, CHECK);
3829 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3830 if (runtime_visible_annotations != NULL) {
3831 classfile_parse_error(
3832 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3833 return;
3834 }
3835 runtime_visible_annotations_length = attribute_length;
3836 runtime_visible_annotations = cfs->current();
3837 assert(runtime_visible_annotations != NULL, "null visible annotations");
3838 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3839 parse_annotations(cp,
3840 runtime_visible_annotations,
3841 runtime_visible_annotations_length,
3842 parsed_annotations,
3843 _loader_data,
3844 _can_access_vm_annotations);
3845 cfs->skip_u1_fast(runtime_visible_annotations_length);
3846 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3847 if (runtime_invisible_annotations_exists) {
3848 classfile_parse_error(
3849 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3850 return;
3851 }
3852 runtime_invisible_annotations_exists = true;
3853 if (PreserveAllAnnotations) {
3854 runtime_invisible_annotations_length = attribute_length;
3855 runtime_invisible_annotations = cfs->current();
3856 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3857 }
3858 cfs->skip_u1(attribute_length, CHECK);
3859 } else if (tag == vmSymbols::tag_enclosing_method()) {
3860 if (parsed_enclosingmethod_attribute) {
3861 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3862 return;
3863 } else {
3864 parsed_enclosingmethod_attribute = true;
3865 }
3866 guarantee_property(attribute_length == 4,
3867 "Wrong EnclosingMethod attribute length %u in class file %s",
3868 attribute_length, CHECK);
3869 cfs->guarantee_more(4, CHECK); // class_index, method_index
3870 enclosing_method_class_index = cfs->get_u2_fast();
3871 enclosing_method_method_index = cfs->get_u2_fast();
3872 if (enclosing_method_class_index == 0) {
3873 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3874 return;
3875 }
3876 // Validate the constant pool indices and types
3877 check_property(valid_klass_reference_at(enclosing_method_class_index),
3878 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3879 if (enclosing_method_method_index != 0 &&
3880 (!cp->is_within_bounds(enclosing_method_method_index) ||
3881 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3882 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3883 return;
3884 }
3885 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3886 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3887 if (parsed_bootstrap_methods_attribute) {
3888 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3889 return;
3890 }
3891 parsed_bootstrap_methods_attribute = true;
3892 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3893 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3894 if (runtime_visible_type_annotations != NULL) {
3895 classfile_parse_error(
3896 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3897 return;
3898 }
3899 runtime_visible_type_annotations_length = attribute_length;
3900 runtime_visible_type_annotations = cfs->current();
3901 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3902 // No need for the VM to parse Type annotations
3903 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3904 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3905 if (runtime_invisible_type_annotations_exists) {
3906 classfile_parse_error(
3907 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3908 return;
3909 } else {
3910 runtime_invisible_type_annotations_exists = true;
3911 }
3912 if (PreserveAllAnnotations) {
3913 runtime_invisible_type_annotations_length = attribute_length;
3914 runtime_invisible_type_annotations = cfs->current();
3915 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3916 }
3917 cfs->skip_u1(attribute_length, CHECK);
3918 } else if (_major_version >= JAVA_11_VERSION) {
3919 if (tag == vmSymbols::tag_nest_members()) {
3920 // Check for NestMembers tag
3921 if (parsed_nest_members_attribute) {
3922 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3923 return;
3924 } else {
3925 parsed_nest_members_attribute = true;
3926 }
3927 if (parsed_nest_host_attribute) {
3928 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3929 return;
3930 }
3931 nest_members_attribute_start = cfs->current();
3932 nest_members_attribute_length = attribute_length;
3933 cfs->skip_u1(nest_members_attribute_length, CHECK);
3934 } else if (tag == vmSymbols::tag_nest_host()) {
3935 if (parsed_nest_host_attribute) {
3936 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
3937 return;
3938 } else {
3939 parsed_nest_host_attribute = true;
3940 }
3941 if (parsed_nest_members_attribute) {
3942 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
3943 return;
3944 }
3945 if (_need_verify) {
3946 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3947 }
3948 cfs->guarantee_more(2, CHECK);
3949 u2 class_info_index = cfs->get_u2_fast();
3950 check_property(
3951 valid_klass_reference_at(class_info_index),
3952 "Nest-host class_info_index %u has bad constant type in class file %s",
3953 class_info_index, CHECK);
3954 _nest_host = class_info_index;
3955
3956 } else if (_major_version >= JAVA_16_VERSION) {
3957 if (tag == vmSymbols::tag_record()) {
3958 if (parsed_record_attribute) {
3959 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
3960 return;
3961 }
3962 parsed_record_attribute = true;
3963 record_attribute_start = cfs->current();
3964 record_attribute_length = attribute_length;
3965 } else if (_major_version >= JAVA_17_VERSION) {
3966 if (tag == vmSymbols::tag_permitted_subclasses()) {
3967 if (parsed_permitted_subclasses_attribute) {
3968 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3969 return;
3970 }
3971 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3972 if (_access_flags.is_final()) {
3973 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3974 return;
3975 }
3976 parsed_permitted_subclasses_attribute = true;
3977 permitted_subclasses_attribute_start = cfs->current();
3978 permitted_subclasses_attribute_length = attribute_length;
3979 }
3980 }
3981 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3982 cfs->skip_u1(attribute_length, CHECK);
3983 } else {
3984 // Unknown attribute
3985 cfs->skip_u1(attribute_length, CHECK);
3986 }
3987 } else {
3988 // Unknown attribute
3989 cfs->skip_u1(attribute_length, CHECK);
3990 }
3991 } else {
3992 // Unknown attribute
3993 cfs->skip_u1(attribute_length, CHECK);
3994 }
3995 }
3996 _class_annotations = assemble_annotations(runtime_visible_annotations,
3997 runtime_visible_annotations_length,
3998 runtime_invisible_annotations,
3999 runtime_invisible_annotations_length,
4000 CHECK);
4001 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
4002 runtime_visible_type_annotations_length,
4003 runtime_invisible_type_annotations,
4004 runtime_invisible_type_annotations_length,
4005 CHECK);
4006
4007 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
4008 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
4009 cfs,
4010 cp,
4011 inner_classes_attribute_start,
4012 parsed_innerclasses_attribute,
4013 enclosing_method_class_index,
4014 enclosing_method_method_index,
4015 CHECK);
4016 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
4017 guarantee_property(
4018 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
4019 "Wrong InnerClasses attribute length in class file %s", CHECK);
4020 }
4021 }
4022
4023 if (parsed_nest_members_attribute) {
4024 const u2 num_of_classes = parse_classfile_nest_members_attribute(
4025 cfs,
4026 nest_members_attribute_start,
4027 CHECK);
4028 if (_need_verify) {
4029 guarantee_property(
4030 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
4031 "Wrong NestMembers attribute length in class file %s", CHECK);
4032 }
4033 }
4034
4035 if (parsed_record_attribute) {
4036 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
4037 cfs,
4038 cp,
4039 record_attribute_start,
4040 CHECK);
4041 if (_need_verify) {
4042 guarantee_property(record_attribute_length == calculated_attr_length,
4043 "Record attribute has wrong length in class file %s",
4044 CHECK);
4045 }
4046 }
4047
4048 if (parsed_permitted_subclasses_attribute) {
4049 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
4050 cfs,
4051 permitted_subclasses_attribute_start,
4052 CHECK);
4053 if (_need_verify) {
4054 guarantee_property(
4055 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
4056 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
4057 }
4058 }
4059
4060 if (_max_bootstrap_specifier_index >= 0) {
4061 guarantee_property(parsed_bootstrap_methods_attribute,
4062 "Missing BootstrapMethods attribute in class file %s", CHECK);
4063 }
4064 }
4065
4066 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
4067 assert(k != NULL, "invariant");
4068
4069 if (_synthetic_flag)
4070 k->set_is_synthetic();
4071 if (_sourcefile_index != 0) {
4072 k->set_source_file_name_index(_sourcefile_index);
4073 }
4074 if (_generic_signature_index != 0) {
4075 k->set_generic_signature_index(_generic_signature_index);
4076 }
4077 if (_sde_buffer != NULL) {
4078 k->set_source_debug_extension(_sde_buffer, _sde_length);
4079 }
4080 }
4081
4082 // Create the Annotations object that will
4083 // hold the annotations array for the Klass.
4084 void ClassFileParser::create_combined_annotations(TRAPS) {
4085 if (_class_annotations == NULL &&
4086 _class_type_annotations == NULL &&
4087 _fields_annotations == NULL &&
4088 _fields_type_annotations == NULL) {
4089 // Don't create the Annotations object unnecessarily.
4090 return;
4091 }
4092
4093 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
4094 annotations->set_class_annotations(_class_annotations);
4095 annotations->set_class_type_annotations(_class_type_annotations);
4096 annotations->set_fields_annotations(_fields_annotations);
4097 annotations->set_fields_type_annotations(_fields_type_annotations);
4098
4099 // This is the Annotations object that will be
4100 // assigned to InstanceKlass being constructed.
4101 _combined_annotations = annotations;
4102
4103 // The annotations arrays below has been transfered the
4104 // _combined_annotations so these fields can now be cleared.
4105 _class_annotations = NULL;
4106 _class_type_annotations = NULL;
4107 _fields_annotations = NULL;
4108 _fields_type_annotations = NULL;
4109 }
4110
4111 // Transfer ownership of metadata allocated to the InstanceKlass.
4112 void ClassFileParser::apply_parsed_class_metadata(
4113 InstanceKlass* this_klass,
4114 int java_fields_count) {
4115 assert(this_klass != NULL, "invariant");
4116
4117 _cp->set_pool_holder(this_klass);
4118 this_klass->set_constants(_cp);
4119 this_klass->set_fields(_fields, java_fields_count);
4120 this_klass->set_methods(_methods);
4121 this_klass->set_inner_classes(_inner_classes);
4122 this_klass->set_nest_members(_nest_members);
4123 this_klass->set_nest_host_index(_nest_host);
4124 this_klass->set_annotations(_combined_annotations);
4125 this_klass->set_permitted_subclasses(_permitted_subclasses);
4126 this_klass->set_record_components(_record_components);
4127 // Delay the setting of _local_interfaces and _transitive_interfaces until after
4128 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
4129 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
4130 // its _super. If an OOM occurs while loading the current klass, its _super field
4131 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
4132 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
4133 // dereferences to the deallocated _transitive_interfaces will result in a crash.
4134
4135 // Clear out these fields so they don't get deallocated by the destructor
4136 clear_class_metadata();
4137 }
4138
4139 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
4140 int runtime_visible_annotations_length,
4141 const u1* const runtime_invisible_annotations,
4142 int runtime_invisible_annotations_length,
4143 TRAPS) {
4144 AnnotationArray* annotations = NULL;
4145 if (runtime_visible_annotations != NULL ||
4146 runtime_invisible_annotations != NULL) {
4147 annotations = MetadataFactory::new_array<u1>(_loader_data,
4148 runtime_visible_annotations_length +
4149 runtime_invisible_annotations_length,
4150 CHECK_(annotations));
4151 if (runtime_visible_annotations != NULL) {
4152 for (int i = 0; i < runtime_visible_annotations_length; i++) {
4153 annotations->at_put(i, runtime_visible_annotations[i]);
4154 }
4155 }
4156 if (runtime_invisible_annotations != NULL) {
4157 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
4158 int append = runtime_visible_annotations_length+i;
4159 annotations->at_put(append, runtime_invisible_annotations[i]);
4160 }
4161 }
4162 }
4163 return annotations;
4164 }
4165
4166 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
4167 const int super_class_index,
4168 const bool need_verify,
4169 TRAPS) {
4170 assert(cp != NULL, "invariant");
4171 const InstanceKlass* super_klass = NULL;
4172
4173 if (super_class_index == 0) {
4174 check_property(_class_name == vmSymbols::java_lang_Object(),
4175 "Invalid superclass index 0 in class file %s",
4176 CHECK_NULL);
4177 } else {
4178 check_property(valid_klass_reference_at(super_class_index),
4179 "Invalid superclass index %u in class file %s",
4180 super_class_index,
4181 CHECK_NULL);
4182 // The class name should be legal because it is checked when parsing constant pool.
4183 // However, make sure it is not an array type.
4184 bool is_array = false;
4185 if (cp->tag_at(super_class_index).is_klass()) {
4186 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
4187 if (need_verify)
4188 is_array = super_klass->is_array_klass();
4189 } else if (need_verify) {
4190 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
4191 }
4192 if (need_verify) {
4193 guarantee_property(!is_array,
4194 "Bad superclass name in class file %s", CHECK_NULL);
4195 }
4196 }
4197 return super_klass;
4198 }
4199
4200 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
4201 _max_nonstatic_oop_maps = max_blocks;
4202 _nonstatic_oop_map_count = 0;
4203 if (max_blocks == 0) {
4204 _nonstatic_oop_maps = NULL;
4205 } else {
4206 _nonstatic_oop_maps =
4207 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
4208 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
4209 }
4210 }
4211
4212 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
4213 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
4214 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
4215 }
4216
4217 // addition of super oop maps
4218 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
4219 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
4220 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
4221
4222 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
4223 _nonstatic_oop_map_count += nof_blocks;
4224 }
4225
4226 // collection of oops
4227 void OopMapBlocksBuilder::add(int offset, int count) {
4228 if (_nonstatic_oop_map_count == 0) {
4229 _nonstatic_oop_map_count++;
4230 }
4231 OopMapBlock* nonstatic_oop_map = last_oop_map();
4232 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
4233 nonstatic_oop_map->set_offset(offset);
4234 nonstatic_oop_map->set_count(count);
4235 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
4236 nonstatic_oop_map->increment_count(count);
4237 } else { // Need a new one...
4238 _nonstatic_oop_map_count++;
4239 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
4240 nonstatic_oop_map = last_oop_map();
4241 nonstatic_oop_map->set_offset(offset);
4242 nonstatic_oop_map->set_count(count);
4243 }
4244 }
4245
4246 // general purpose copy, e.g. into allocated instanceKlass
4247 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
4248 if (_nonstatic_oop_map_count != 0) {
4249 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
4250 }
4251 }
4252
4253 // Sort and compact adjacent blocks
4254 void OopMapBlocksBuilder::compact() {
4255 if (_nonstatic_oop_map_count <= 1) {
4256 return;
4257 }
4258 /*
4259 * Since field layout sneeks in oops before values, we will be able to condense
4260 * blocks. There is potential to compact between super, own refs and values
4261 * containing refs.
4262 *
4263 * Currently compaction is slightly limited due to values being 8 byte aligned.
4264 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
4265 * and maybe it doesn't need to be.
4266 */
4267 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
4268 (_sort_Fn)OopMapBlock::compare_offset);
4269 if (_nonstatic_oop_map_count < 2) {
4270 return;
4271 }
4272
4273 // Make a temp copy, and iterate through and copy back into the original
4274 ResourceMark rm;
4275 OopMapBlock* oop_maps_copy =
4276 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
4277 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
4278 copy(oop_maps_copy);
4279 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
4280 unsigned int new_count = 1;
4281 oop_maps_copy++;
4282 while(oop_maps_copy < oop_maps_copy_end) {
4283 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
4284 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
4285 nonstatic_oop_map->increment_count(oop_maps_copy->count());
4286 } else {
4287 nonstatic_oop_map++;
4288 new_count++;
4289 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
4290 nonstatic_oop_map->set_count(oop_maps_copy->count());
4291 }
4292 oop_maps_copy++;
4293 }
4294 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
4295 _nonstatic_oop_map_count = new_count;
4296 }
4297
4298 void OopMapBlocksBuilder::print_on(outputStream* st) const {
4299 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
4300 if (_nonstatic_oop_map_count > 0) {
4301 OopMapBlock* map = _nonstatic_oop_maps;
4302 OopMapBlock* last_map = last_oop_map();
4303 assert(map <= last_map, "Last less than first");
4304 while (map <= last_map) {
4305 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
4306 map->offset() + map->offset_span() - heapOopSize, map->count());
4307 map++;
4308 }
4309 }
4310 }
4311
4312 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
4313 print_on(st);
4314 }
4315
4316 void ClassFileParser::throwInlineTypeLimitation(THREAD_AND_LOCATION_DECL,
4317 const char* msg,
4318 const Symbol* name,
4319 const Symbol* sig) const {
4320
4321 ResourceMark rm(THREAD);
4322 if (name == NULL || sig == NULL) {
4323 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4324 vmSymbols::java_lang_ClassFormatError(),
4325 "class: %s - %s", _class_name->as_C_string(), msg);
4326 }
4327 else {
4328 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4329 vmSymbols::java_lang_ClassFormatError(),
4330 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
4331 _class_name->as_C_string(), msg);
4332 }
4333 }
4334
4335 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4336 assert(ik != NULL, "invariant");
4337
4338 const Klass* const super = ik->super();
4339
4340 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4341 // in which case we don't have to register objects as finalizable
4342 if (!_has_empty_finalizer) {
4343 if (_has_finalizer ||
4344 (super != NULL && super->has_finalizer())) {
4345 ik->set_has_finalizer();
4346 }
4347 }
4348
4349 #ifdef ASSERT
4350 bool f = false;
4351 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4352 vmSymbols::void_method_signature());
4353 if (m != NULL && !m->is_empty_method()) {
4354 f = true;
4355 }
4356
4357 // Spec doesn't prevent agent from redefinition of empty finalizer.
4358 // Despite the fact that it's generally bad idea and redefined finalizer
4359 // will not work as expected we shouldn't abort vm in this case
4360 if (!ik->has_redefined_this_or_super()) {
4361 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4362 }
4363 #endif
4364
4365 // Check if this klass supports the java.lang.Cloneable interface
4366 if (vmClasses::Cloneable_klass_loaded()) {
4367 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
4368 if (ik->is_inline_klass()) {
4369 JavaThread *THREAD = JavaThread::current();
4370 throwInlineTypeLimitation(THREAD_AND_LOCATION, "Inline Types do not support Cloneable");
4371 return;
4372 }
4373 ik->set_is_cloneable();
4374 }
4375 }
4376
4377 // Check if this klass has a vanilla default constructor
4378 if (super == NULL) {
4379 // java.lang.Object has empty default constructor
4380 ik->set_has_vanilla_constructor();
4381 } else {
4382 if (super->has_vanilla_constructor() &&
4383 _has_vanilla_constructor) {
4384 ik->set_has_vanilla_constructor();
4385 }
4386 #ifdef ASSERT
4387 bool v = false;
4388 if (super->has_vanilla_constructor()) {
4389 const Method* const constructor =
4390 ik->find_method(vmSymbols::object_initializer_name(),
4391 vmSymbols::void_method_signature());
4392 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4393 v = true;
4394 }
4395 }
4396 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4397 #endif
4398 }
4399
4400 // If it cannot be fast-path allocated, set a bit in the layout helper.
4401 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4402 assert(ik->size_helper() > 0, "layout_helper is initialized");
4403 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4404 || ik->is_abstract() || ik->is_interface()
4405 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4406 || ik->size_helper() >= FastAllocateSizeLimit) {
4407 // Forbid fast-path allocation.
4408 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4409 ik->set_layout_helper(lh);
4410 }
4411 }
4412
4413 bool ClassFileParser::supports_inline_types() const {
4414 // Inline types are only supported by class file version 55 and later
4415 return _major_version >= JAVA_11_VERSION;
4416 }
4417
4418 // utility methods for appending an array with check for duplicates
4419
4420 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4421 const Array<InstanceKlass*>* const ifs) {
4422 // iterate over new interfaces
4423 for (int i = 0; i < ifs->length(); i++) {
4424 InstanceKlass* const e = ifs->at(i);
4425 assert(e->is_klass() && e->is_interface(), "just checking");
4426 // add new interface
4427 result->append_if_missing(e);
4428 }
4429 }
4430
4431 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4432 Array<InstanceKlass*>* local_ifs,
4433 ClassLoaderData* loader_data,
4434 TRAPS) {
4435 assert(local_ifs != NULL, "invariant");
4436 assert(loader_data != NULL, "invariant");
4437
4438 // Compute maximum size for transitive interfaces
4439 int max_transitive_size = 0;
4440 int super_size = 0;
4441 // Add superclass transitive interfaces size
4442 if (super != NULL) {
4443 super_size = super->transitive_interfaces()->length();
4444 max_transitive_size += super_size;
4445 }
4446 // Add local interfaces' super interfaces
4447 const int local_size = local_ifs->length();
4448 for (int i = 0; i < local_size; i++) {
4449 InstanceKlass* const l = local_ifs->at(i);
4450 max_transitive_size += l->transitive_interfaces()->length();
4451 }
4452 // Finally add local interfaces
4453 max_transitive_size += local_size;
4454 // Construct array
4455 if (max_transitive_size == 0) {
4456 // no interfaces, use canonicalized array
4457 return Universe::the_empty_instance_klass_array();
4458 } else if (max_transitive_size == super_size) {
4459 // no new local interfaces added, share superklass' transitive interface array
4460 return super->transitive_interfaces();
4461 // The three lines below are commented to work around bug JDK-8245487
4462 // } else if (max_transitive_size == local_size) {
4463 // // only local interfaces added, share local interface array
4464 // return local_ifs;
4465 } else {
4466 ResourceMark rm;
4467 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4468
4469 // Copy down from superclass
4470 if (super != NULL) {
4471 append_interfaces(result, super->transitive_interfaces());
4472 }
4473
4474 // Copy down from local interfaces' superinterfaces
4475 for (int i = 0; i < local_size; i++) {
4476 InstanceKlass* const l = local_ifs->at(i);
4477 append_interfaces(result, l->transitive_interfaces());
4478 }
4479 // Finally add local interfaces
4480 append_interfaces(result, local_ifs);
4481
4482 // length will be less than the max_transitive_size if duplicates were removed
4483 const int length = result->length();
4484 assert(length <= max_transitive_size, "just checking");
4485
4486 if (length == 1 && result->at(0) == vmClasses::IdentityObject_klass()) {
4487 return Universe::the_single_IdentityObject_klass_array();
4488 }
4489 if (length == 1 && result->at(0) == vmClasses::ValueObject_klass()) {
4490 return Universe::the_single_ValueObject_klass_array();
4491 }
4492
4493 Array<InstanceKlass*>* const new_result =
4494 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4495 for (int i = 0; i < length; i++) {
4496 InstanceKlass* const e = result->at(i);
4497 assert(e != NULL, "just checking");
4498 new_result->at_put(i, e);
4499 }
4500 return new_result;
4501 }
4502 }
4503
4504 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4505 assert(this_klass != NULL, "invariant");
4506 const Klass* const super = this_klass->super();
4507
4508 if (super != NULL) {
4509 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4510
4511 if (super->is_final()) {
4512 classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4513 return;
4514 }
4515
4516 if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4517 classfile_icce_error("class %s cannot inherit from sealed class %s", super_ik, THREAD);
4518 return;
4519 }
4520
4521 // If the loader is not the boot loader then throw an exception if its
4522 // superclass is in package jdk.internal.reflect and its loader is not a
4523 // special reflection class loader
4524 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4525 PackageEntry* super_package = super->package();
4526 if (super_package != NULL &&
4527 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4528 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4529 ResourceMark rm(THREAD);
4530 Exceptions::fthrow(
4531 THREAD_AND_LOCATION,
4532 vmSymbols::java_lang_IllegalAccessError(),
4533 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4534 this_klass->external_name(),
4535 this_klass->class_loader_data()->loader_name_and_id(),
4536 super->external_name());
4537 return;
4538 }
4539 }
4540
4541 Reflection::VerifyClassAccessResults vca_result =
4542 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4543 if (vca_result != Reflection::ACCESS_OK) {
4544 ResourceMark rm(THREAD);
4545 char* msg = Reflection::verify_class_access_msg(this_klass,
4546 InstanceKlass::cast(super),
4547 vca_result);
4548 if (msg == NULL) {
4549 bool same_module = (this_klass->module() == super->module());
4550 Exceptions::fthrow(
4551 THREAD_AND_LOCATION,
4552 vmSymbols::java_lang_IllegalAccessError(),
4553 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4554 this_klass->external_name(),
4555 super->is_abstract() ? "abstract " : "",
4556 super->external_name(),
4557 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4558 (same_module) ? "" : "; ",
4559 (same_module) ? "" : super->class_in_module_of_loader());
4560 } else {
4561 // Add additional message content.
4562 Exceptions::fthrow(
4563 THREAD_AND_LOCATION,
4564 vmSymbols::java_lang_IllegalAccessError(),
4565 "superclass access check failed: %s",
4566 msg);
4567 }
4568 }
4569 }
4570 }
4571
4572
4573 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4574 assert(this_klass != NULL, "invariant");
4575 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4576 const int lng = local_interfaces->length();
4577 for (int i = lng - 1; i >= 0; i--) {
4578 InstanceKlass* const k = local_interfaces->at(i);
4579 assert (k != NULL && k->is_interface(), "invalid interface");
4580
4581 if (k->is_sealed() && !k->has_as_permitted_subclass(this_klass)) {
4582 classfile_icce_error(this_klass->is_interface() ?
4583 "class %s cannot extend sealed interface %s" :
4584 "class %s cannot implement sealed interface %s",
4585 k, THREAD);
4586 return;
4587 }
4588
4589 Reflection::VerifyClassAccessResults vca_result =
4590 Reflection::verify_class_access(this_klass, k, false);
4591 if (vca_result != Reflection::ACCESS_OK) {
4592 ResourceMark rm(THREAD);
4593 char* msg = Reflection::verify_class_access_msg(this_klass,
4594 k,
4595 vca_result);
4596 if (msg == NULL) {
4597 bool same_module = (this_klass->module() == k->module());
4598 Exceptions::fthrow(
4599 THREAD_AND_LOCATION,
4600 vmSymbols::java_lang_IllegalAccessError(),
4601 "class %s cannot access its superinterface %s (%s%s%s)",
4602 this_klass->external_name(),
4603 k->external_name(),
4604 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4605 (same_module) ? "" : "; ",
4606 (same_module) ? "" : k->class_in_module_of_loader());
4607 } else {
4608 // Add additional message content.
4609 Exceptions::fthrow(
4610 THREAD_AND_LOCATION,
4611 vmSymbols::java_lang_IllegalAccessError(),
4612 "superinterface check failed: %s",
4613 msg);
4614 }
4615 }
4616 }
4617 }
4618
4619
4620 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4621 assert(this_klass != NULL, "invariant");
4622 const Array<Method*>* const methods = this_klass->methods();
4623 const int num_methods = methods->length();
4624
4625 // go thru each method and check if it overrides a final method
4626 for (int index = 0; index < num_methods; index++) {
4627 const Method* const m = methods->at(index);
4628
4629 // skip private, static, and <init> methods
4630 if ((!m->is_private() && !m->is_static()) &&
4631 (m->name() != vmSymbols::object_initializer_name())) {
4632
4633 const Symbol* const name = m->name();
4634 const Symbol* const signature = m->signature();
4635 const Klass* k = this_klass->super();
4636 const Method* super_m = NULL;
4637 while (k != NULL) {
4638 // skip supers that don't have final methods.
4639 if (k->has_final_method()) {
4640 // lookup a matching method in the super class hierarchy
4641 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4642 if (super_m == NULL) {
4643 break; // didn't find any match; get out
4644 }
4645
4646 if (super_m->is_final() && !super_m->is_static() &&
4647 !super_m->access_flags().is_private()) {
4648 // matching method in super is final, and not static or private
4649 bool can_access = Reflection::verify_member_access(this_klass,
4650 super_m->method_holder(),
4651 super_m->method_holder(),
4652 super_m->access_flags(),
4653 false, false, CHECK);
4654 if (can_access) {
4655 // this class can access super final method and therefore override
4656 ResourceMark rm(THREAD);
4657 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4658 err_msg("class %s overrides final method %s.%s%s",
4659 this_klass->external_name(),
4660 super_m->method_holder()->external_name(),
4661 name->as_C_string(),
4662 signature->as_C_string()));
4663 }
4664 }
4665
4666 // continue to look from super_m's holder's super.
4667 k = super_m->method_holder()->super();
4668 continue;
4669 }
4670
4671 k = k->super();
4672 }
4673 }
4674 }
4675 }
4676
4677
4678 // assumes that this_klass is an interface
4679 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4680 assert(this_klass != NULL, "invariant");
4681 assert(this_klass->is_interface(), "not an interface");
4682 const Array<Method*>* methods = this_klass->methods();
4683 const int num_methods = methods->length();
4684
4685 for (int index = 0; index < num_methods; index++) {
4686 const Method* const m = methods->at(index);
4687 // if m is static and not the init method, throw a verify error
4688 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4689 ResourceMark rm(THREAD);
4690 Exceptions::fthrow(
4691 THREAD_AND_LOCATION,
4692 vmSymbols::java_lang_VerifyError(),
4693 "Illegal static method %s in interface %s",
4694 m->name()->as_C_string(),
4695 this_klass->external_name()
4696 );
4697 return;
4698 }
4699 }
4700 }
4701
4702 // utility methods for format checking
4703
4704 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4705 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4706 const bool is_inline_type = (flags & JVM_ACC_INLINE) != 0;
4707 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4708 assert(supports_inline_types() || !is_inline_type, "JVM_ACC_INLINE should not be set");
4709 if (is_module) {
4710 ResourceMark rm(THREAD);
4711 Exceptions::fthrow(
4712 THREAD_AND_LOCATION,
4713 vmSymbols::java_lang_NoClassDefFoundError(),
4714 "%s is not a class because access_flag ACC_MODULE is set",
4715 _class_name->as_C_string());
4716 return;
4717 }
4718
4719 if (is_inline_type && !EnableValhalla) {
4720 ResourceMark rm(THREAD);
4721 Exceptions::fthrow(
4722 THREAD_AND_LOCATION,
4723 vmSymbols::java_lang_ClassFormatError(),
4724 "Class modifier ACC_INLINE in class %s requires option -XX:+EnableValhalla",
4725 _class_name->as_C_string()
4726 );
4727 return;
4728 }
4729
4730 if (!_need_verify) { return; }
4731
4732 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4733 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4734 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4735 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4736 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4737 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4738 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4739 const bool major_gte_14 = _major_version >= JAVA_14_VERSION;
4740
4741 if ((is_abstract && is_final) ||
4742 (is_interface && !is_abstract) ||
4743 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4744 (!is_interface && major_gte_1_5 && is_annotation) ||
4745 (is_inline_type && (is_interface || is_abstract || is_enum || !is_final))) {
4746 ResourceMark rm(THREAD);
4747 const char* class_note = "";
4748 if (is_inline_type) class_note = " (an inline class)";
4749 Exceptions::fthrow(
4750 THREAD_AND_LOCATION,
4751 vmSymbols::java_lang_ClassFormatError(),
4752 "Illegal class modifiers in class %s%s: 0x%X",
4753 _class_name->as_C_string(), class_note, flags
4754 );
4755 return;
4756 }
4757 }
4758
4759 static bool has_illegal_visibility(jint flags) {
4760 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4761 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4762 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4763
4764 return ((is_public && is_protected) ||
4765 (is_public && is_private) ||
4766 (is_protected && is_private));
4767 }
4768
4769 // A legal major_version.minor_version must be one of the following:
4770 //
4771 // Major_version >= 45 and major_version < 56, any minor_version.
4772 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4773 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4774 //
4775 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4776 ResourceMark rm(THREAD);
4777 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4778 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4779 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4780 class_name, major, minor, THREAD);
4781 return;
4782 }
4783
4784 if (major > max_version) {
4785 Exceptions::fthrow(
4786 THREAD_AND_LOCATION,
4787 vmSymbols::java_lang_UnsupportedClassVersionError(),
4788 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4789 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4790 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4791 return;
4792 }
4793
4794 if (major < JAVA_12_VERSION || minor == 0) {
4795 return;
4796 }
4797
4798 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4799 if (major != max_version) {
4800 Exceptions::fthrow(
4801 THREAD_AND_LOCATION,
4802 vmSymbols::java_lang_UnsupportedClassVersionError(),
4803 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4804 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4805 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4806 return;
4807 }
4808
4809 if (!Arguments::enable_preview()) {
4810 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4811 class_name, major, minor, THREAD);
4812 return;
4813 }
4814
4815 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4816 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4817 class_name, major, minor, THREAD);
4818 }
4819 }
4820
4821 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4822 bool is_interface,
4823 bool is_inline_type,
4824 TRAPS) const {
4825 if (!_need_verify) { return; }
4826
4827 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4828 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4829 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4830 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4831 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4832 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4833 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4834 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4835 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4836
4837 bool is_illegal = false;
4838
4839 if (is_interface) {
4840 if (!is_public || !is_static || !is_final || is_private ||
4841 is_protected || is_volatile || is_transient ||
4842 (major_gte_1_5 && is_enum)) {
4843 is_illegal = true;
4844 }
4845 } else { // not interface
4846 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4847 is_illegal = true;
4848 } else {
4849 if (is_inline_type && !is_static && !is_final) {
4850 is_illegal = true;
4851 }
4852 }
4853 }
4854
4855 if (is_illegal) {
4856 ResourceMark rm(THREAD);
4857 Exceptions::fthrow(
4858 THREAD_AND_LOCATION,
4859 vmSymbols::java_lang_ClassFormatError(),
4860 "Illegal field modifiers in class %s: 0x%X",
4861 _class_name->as_C_string(), flags);
4862 return;
4863 }
4864 }
4865
4866 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4867 bool is_interface,
4868 bool is_inline_type,
4869 const Symbol* name,
4870 TRAPS) const {
4871 if (!_need_verify) { return; }
4872
4873 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4874 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4875 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4876 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4877 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4878 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4879 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4880 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4881 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4882 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4883 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4884 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4885 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4886 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4887
4888 bool is_illegal = false;
4889
4890 const char* class_note = "";
4891 if (is_interface) {
4892 if (major_gte_8) {
4893 // Class file version is JAVA_8_VERSION or later Methods of
4894 // interfaces may set any of the flags except ACC_PROTECTED,
4895 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4896 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4897 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4898 (is_native || is_protected || is_final || is_synchronized) ||
4899 // If a specific method of a class or interface has its
4900 // ACC_ABSTRACT flag set, it must not have any of its
4901 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4902 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4903 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4904 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4905 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4906 is_illegal = true;
4907 }
4908 } else if (major_gte_1_5) {
4909 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4910 if (!is_public || is_private || is_protected || is_static || is_final ||
4911 is_synchronized || is_native || !is_abstract || is_strict) {
4912 is_illegal = true;
4913 }
4914 } else {
4915 // Class file version is pre-JAVA_1_5_VERSION
4916 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4917 is_illegal = true;
4918 }
4919 }
4920 } else { // not interface
4921 if (has_illegal_visibility(flags)) {
4922 is_illegal = true;
4923 } else {
4924 if (is_initializer) {
4925 if (is_final || is_synchronized || is_native ||
4926 is_abstract || (major_gte_1_5 && is_bridge)) {
4927 is_illegal = true;
4928 }
4929 if (!is_static && !is_inline_type) {
4930 // OK, an object constructor in a regular class
4931 } else if (is_static && is_inline_type) {
4932 // OK, a static init factory in an inline class
4933 } else {
4934 // but no other combinations are allowed
4935 is_illegal = true;
4936 class_note = (is_inline_type ? " (an inline class)" : " (not an inline class)");
4937 }
4938 } else { // not initializer
4939 if (is_inline_type && is_synchronized && !is_static) {
4940 is_illegal = true;
4941 class_note = " (an inline class)";
4942 } else {
4943 if (is_abstract) {
4944 if ((is_final || is_native || is_private || is_static ||
4945 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4946 is_illegal = true;
4947 }
4948 }
4949 }
4950 }
4951 }
4952 }
4953
4954 if (is_illegal) {
4955 ResourceMark rm(THREAD);
4956 Exceptions::fthrow(
4957 THREAD_AND_LOCATION,
4958 vmSymbols::java_lang_ClassFormatError(),
4959 "Method %s in class %s%s has illegal modifiers: 0x%X",
4960 name->as_C_string(), _class_name->as_C_string(), class_note, flags);
4961 return;
4962 }
4963 }
4964
4965 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4966 int length,
4967 TRAPS) const {
4968 assert(_need_verify, "only called when _need_verify is true");
4969 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4970 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4971 }
4972 }
4973
4974 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4975 // In class names, '/' separates unqualified names. This is verified in this function also.
4976 // Method names also may not contain the characters '<' or '>', unless <init>
4977 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4978 // method. Because these names have been checked as special cases before
4979 // calling this method in verify_legal_method_name.
4980 //
4981 // This method is also called from the modular system APIs in modules.cpp
4982 // to verify the validity of module and package names.
4983 bool ClassFileParser::verify_unqualified_name(const char* name,
4984 unsigned int length,
4985 int type) {
4986 if (length == 0) return false; // Must have at least one char.
4987 for (const char* p = name; p != name + length; p++) {
4988 switch(*p) {
4989 case JVM_SIGNATURE_DOT:
4990 case JVM_SIGNATURE_ENDCLASS:
4991 case JVM_SIGNATURE_ARRAY:
4992 // do not permit '.', ';', or '['
4993 return false;
4994 case JVM_SIGNATURE_SLASH:
4995 // check for '//' or leading or trailing '/' which are not legal
4996 // unqualified name must not be empty
4997 if (type == ClassFileParser::LegalClass) {
4998 if (p == name || p+1 >= name+length ||
4999 *(p+1) == JVM_SIGNATURE_SLASH) {
5000 return false;
5001 }
5002 } else {
5003 return false; // do not permit '/' unless it's class name
5004 }
5005 break;
5006 case JVM_SIGNATURE_SPECIAL:
5007 case JVM_SIGNATURE_ENDSPECIAL:
5008 // do not permit '<' or '>' in method names
5009 if (type == ClassFileParser::LegalMethod) {
5010 return false;
5011 }
5012 }
5013 }
5014 return true;
5015 }
5016
5017 // Take pointer to a UTF8 byte string (not NUL-terminated).
5018 // Skip over the longest part of the string that could
5019 // be taken as a fieldname. Allow '/' if slash_ok is true.
5020 // Return a pointer to just past the fieldname.
5021 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5022 // being true, we saw consecutive slashes (meaning we were looking for a
5023 // qualified path but found something that was badly-formed).
5024 static const char* skip_over_field_name(const char* const name,
5025 bool slash_ok,
5026 unsigned int length) {
5027 const char* p;
5028 jboolean last_is_slash = false;
5029 jboolean not_first_ch = false;
5030
5031 for (p = name; p != name + length; not_first_ch = true) {
5032 const char* old_p = p;
5033 jchar ch = *p;
5034 if (ch < 128) {
5035 p++;
5036 // quick check for ascii
5037 if ((ch >= 'a' && ch <= 'z') ||
5038 (ch >= 'A' && ch <= 'Z') ||
5039 (ch == '_' || ch == '$') ||
5040 (not_first_ch && ch >= '0' && ch <= '9')) {
5041 last_is_slash = false;
5042 continue;
5043 }
5044 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
5045 if (last_is_slash) {
5046 return NULL; // Don't permit consecutive slashes
5047 }
5048 last_is_slash = true;
5049 continue;
5050 }
5051 }
5052 else {
5053 jint unicode_ch;
5054 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5055 p = tmp_p;
5056 last_is_slash = false;
5057 // Check if ch is Java identifier start or is Java identifier part
5058 // 4672820: call java.lang.Character methods directly without generating separate tables.
5059 EXCEPTION_MARK;
5060 // return value
5061 JavaValue result(T_BOOLEAN);
5062 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5063 JavaCallArguments args;
5064 args.push_int(unicode_ch);
5065
5066 if (not_first_ch) {
5067 // public static boolean isJavaIdentifierPart(char ch);
5068 JavaCalls::call_static(&result,
5069 vmClasses::Character_klass(),
5070 vmSymbols::isJavaIdentifierPart_name(),
5071 vmSymbols::int_bool_signature(),
5072 &args,
5073 THREAD);
5074 } else {
5075 // public static boolean isJavaIdentifierStart(char ch);
5076 JavaCalls::call_static(&result,
5077 vmClasses::Character_klass(),
5078 vmSymbols::isJavaIdentifierStart_name(),
5079 vmSymbols::int_bool_signature(),
5080 &args,
5081 THREAD);
5082 }
5083 if (HAS_PENDING_EXCEPTION) {
5084 CLEAR_PENDING_EXCEPTION;
5085 return NULL;
5086 }
5087 if(result.get_jboolean()) {
5088 continue;
5089 }
5090 }
5091 return (not_first_ch) ? old_p : NULL;
5092 }
5093 return (not_first_ch) ? p : NULL;
5094 }
5095
5096 // Take pointer to a UTF8 byte string (not NUL-terminated).
5097 // Skip over the longest part of the string that could
5098 // be taken as a field signature. Allow "void" if void_ok.
5099 // Return a pointer to just past the signature.
5100 // Return NULL if no legal signature is found.
5101 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5102 bool void_ok,
5103 unsigned int length,
5104 TRAPS) const {
5105 unsigned int array_dim = 0;
5106 while (length > 0) {
5107 switch (signature[0]) {
5108 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5109 case JVM_SIGNATURE_BOOLEAN:
5110 case JVM_SIGNATURE_BYTE:
5111 case JVM_SIGNATURE_CHAR:
5112 case JVM_SIGNATURE_SHORT:
5113 case JVM_SIGNATURE_INT:
5114 case JVM_SIGNATURE_FLOAT:
5115 case JVM_SIGNATURE_LONG:
5116 case JVM_SIGNATURE_DOUBLE:
5117 return signature + 1;
5118 case JVM_SIGNATURE_INLINE_TYPE:
5119 // Can't enable this check until JDK upgrades the bytecode generators
5120 // if (_major_version < CONSTANT_CLASS_DESCRIPTORS ) {
5121 // classfile_parse_error("Class name contains illegal Q-signature "
5122 // "in descriptor in class file %s",
5123 // CHECK_0);
5124 // }
5125 // fall through
5126 case JVM_SIGNATURE_CLASS:
5127 {
5128 if (_major_version < JAVA_1_5_VERSION) {
5129 // Skip over the class name if one is there
5130 const char* const p = skip_over_field_name(signature + 1, true, --length);
5131
5132 // The next character better be a semicolon
5133 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5134 return p + 1;
5135 }
5136 }
5137 else {
5138 // Skip leading 'L' or 'Q' and ignore first appearance of ';'
5139 signature++;
5140 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5141 // Format check signature
5142 if (c != NULL) {
5143 int newlen = c - (char*) signature;
5144 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5145 if (!legal) {
5146 classfile_parse_error("Class name is empty or contains illegal character "
5147 "in descriptor in class file %s",
5148 THREAD);
5149 return NULL;
5150 }
5151 return signature + newlen + 1;
5152 }
5153 }
5154 return NULL;
5155 }
5156 case JVM_SIGNATURE_ARRAY:
5157 array_dim++;
5158 if (array_dim > 255) {
5159 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5160 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
5161 return NULL;
5162 }
5163 // The rest of what's there better be a legal signature
5164 signature++;
5165 length--;
5166 void_ok = false;
5167 break;
5168 default:
5169 return NULL;
5170 }
5171 }
5172 return NULL;
5173 }
5174
5175 // Checks if name is a legal class name.
5176 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5177 if (!_need_verify || _relax_verify) { return; }
5178
5179 assert(name->refcount() > 0, "symbol must be kept alive");
5180 char* bytes = (char*)name->bytes();
5181 unsigned int length = name->utf8_length();
5182 bool legal = false;
5183
5184 if (length > 0) {
5185 const char* p;
5186 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5187 p = skip_over_field_signature(bytes, false, length, CHECK);
5188 legal = (p != NULL) && ((p - bytes) == (int)length);
5189 } else if (_major_version < JAVA_1_5_VERSION) {
5190 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5191 p = skip_over_field_name(bytes, true, length);
5192 legal = (p != NULL) && ((p - bytes) == (int)length);
5193 }
5194 } else if ((_major_version >= CONSTANT_CLASS_DESCRIPTORS || _class_name->starts_with("jdk/internal/reflect/"))
5195 && bytes[length - 1] == ';' ) {
5196 // Support for L...; and Q...; descriptors
5197 legal = verify_unqualified_name(bytes + 1, length - 2, LegalClass);
5198 } else {
5199 // 4900761: relax the constraints based on JSR202 spec
5200 // Class names may be drawn from the entire Unicode character set.
5201 // Identifiers between '/' must be unqualified names.
5202 // The utf8 string has been verified when parsing cpool entries.
5203 legal = verify_unqualified_name(bytes, length, LegalClass);
5204 }
5205 }
5206 if (!legal) {
5207 ResourceMark rm(THREAD);
5208 assert(_class_name != NULL, "invariant");
5209 Exceptions::fthrow(
5210 THREAD_AND_LOCATION,
5211 vmSymbols::java_lang_ClassFormatError(),
5212 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5213 _class_name->as_C_string()
5214 );
5215 return;
5216 }
5217 }
5218
5219 // Checks if name is a legal field name.
5220 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5221 if (!_need_verify || _relax_verify) { return; }
5222
5223 char* bytes = (char*)name->bytes();
5224 unsigned int length = name->utf8_length();
5225 bool legal = false;
5226
5227 if (length > 0) {
5228 if (_major_version < JAVA_1_5_VERSION) {
5229 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5230 const char* p = skip_over_field_name(bytes, false, length);
5231 legal = (p != NULL) && ((p - bytes) == (int)length);
5232 }
5233 } else {
5234 // 4881221: relax the constraints based on JSR202 spec
5235 legal = verify_unqualified_name(bytes, length, LegalField);
5236 }
5237 }
5238
5239 if (!legal) {
5240 ResourceMark rm(THREAD);
5241 assert(_class_name != NULL, "invariant");
5242 Exceptions::fthrow(
5243 THREAD_AND_LOCATION,
5244 vmSymbols::java_lang_ClassFormatError(),
5245 "Illegal field name \"%.*s\" in class %s", length, bytes,
5246 _class_name->as_C_string()
5247 );
5248 return;
5249 }
5250 }
5251
5252 // Checks if name is a legal method name.
5253 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5254 if (!_need_verify || _relax_verify) { return; }
5255
5256 assert(name != NULL, "method name is null");
5257 char* bytes = (char*)name->bytes();
5258 unsigned int length = name->utf8_length();
5259 bool legal = false;
5260
5261 if (length > 0) {
5262 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5263 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5264 legal = true;
5265 }
5266 } else if (_major_version < JAVA_1_5_VERSION) {
5267 const char* p;
5268 p = skip_over_field_name(bytes, false, length);
5269 legal = (p != NULL) && ((p - bytes) == (int)length);
5270 } else {
5271 // 4881221: relax the constraints based on JSR202 spec
5272 legal = verify_unqualified_name(bytes, length, LegalMethod);
5273 }
5274 }
5275
5276 if (!legal) {
5277 ResourceMark rm(THREAD);
5278 assert(_class_name != NULL, "invariant");
5279 Exceptions::fthrow(
5280 THREAD_AND_LOCATION,
5281 vmSymbols::java_lang_ClassFormatError(),
5282 "Illegal method name \"%.*s\" in class %s", length, bytes,
5283 _class_name->as_C_string()
5284 );
5285 return;
5286 }
5287 }
5288
5289
5290 // Checks if signature is a legal field signature.
5291 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5292 const Symbol* signature,
5293 TRAPS) const {
5294 if (!_need_verify) { return; }
5295 if (!supports_inline_types() && (signature->is_Q_signature() || signature->is_Q_array_signature())) {
5296 throwIllegalSignature("Field", name, signature, CHECK);
5297 }
5298
5299 const char* const bytes = (const char* const)signature->bytes();
5300 const unsigned int length = signature->utf8_length();
5301 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5302
5303 if (p == NULL || (p - bytes) != (int)length) {
5304 throwIllegalSignature("Field", name, signature, CHECK);
5305 }
5306 }
5307
5308 // Check that the signature is compatible with the method name. For example,
5309 // check that <init> has a void signature.
5310 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
5311 const Symbol* signature,
5312 TRAPS) const {
5313 if (!_need_verify) {
5314 return;
5315 }
5316
5317 // Class initializers cannot have args for class format version >= 51.
5318 if (name == vmSymbols::class_initializer_name() &&
5319 signature != vmSymbols::void_method_signature() &&
5320 _major_version >= JAVA_7_VERSION) {
5321 throwIllegalSignature("Method", name, signature, THREAD);
5322 return;
5323 }
5324
5325 if (!is_inline_type()) {
5326 int sig_length = signature->utf8_length();
5327 if (name->utf8_length() > 0 &&
5328 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
5329 sig_length > 0 &&
5330 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
5331 throwIllegalSignature("Method", name, signature, THREAD);
5332 }
5333 }
5334 }
5335
5336 // Checks if signature is a legal method signature.
5337 // Returns number of parameters
5338 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5339 const Symbol* signature,
5340 TRAPS) const {
5341 if (!_need_verify) {
5342 // make sure caller's args_size will be less than 0 even for non-static
5343 // method so it will be recomputed in compute_size_of_parameters().
5344 return -2;
5345 }
5346
5347 unsigned int args_size = 0;
5348 const char* p = (const char*)signature->bytes();
5349 unsigned int length = signature->utf8_length();
5350 const char* nextp;
5351
5352 // The first character must be a '('
5353 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5354 length--;
5355 // Skip over legal field signatures
5356 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5357 while ((length > 0) && (nextp != NULL)) {
5358 args_size++;
5359 if (p[0] == 'J' || p[0] == 'D') {
5360 args_size++;
5361 }
5362 length -= nextp - p;
5363 p = nextp;
5364 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5365 }
5366 // The first non-signature thing better be a ')'
5367 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5368 length--;
5369 // Now we better just have a return value
5370 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5371 if (nextp && ((int)length == (nextp - p))) {
5372 return args_size;
5373 }
5374 }
5375 }
5376 // Report error
5377 throwIllegalSignature("Method", name, signature, THREAD);
5378 return 0;
5379 }
5380
5381 int ClassFileParser::static_field_size() const {
5382 assert(_field_info != NULL, "invariant");
5383 return _field_info->_static_field_size;
5384 }
5385
5386 int ClassFileParser::total_oop_map_count() const {
5387 assert(_field_info != NULL, "invariant");
5388 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
5389 }
5390
5391 jint ClassFileParser::layout_size() const {
5392 assert(_field_info != NULL, "invariant");
5393 return _field_info->_instance_size;
5394 }
5395
5396 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5397 const Array<Method*>* methods) {
5398 assert(ik != NULL, "invariant");
5399 assert(methods != NULL, "invariant");
5400
5401 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5402 // (We used to do this lazily, but now we query it in Rewriter,
5403 // which is eagerly done for every method, so we might as well do it now,
5404 // when everything is fresh in memory.)
5405 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
5406
5407 if (klass_id != vmSymbolID::NO_SID) {
5408 for (int j = 0; j < methods->length(); ++j) {
5409 Method* method = methods->at(j);
5410 method->init_intrinsic_id(klass_id);
5411
5412 if (CheckIntrinsics) {
5413 // Check if an intrinsic is defined for method 'method',
5414 // but the method is not annotated with @IntrinsicCandidate.
5415 if (method->intrinsic_id() != vmIntrinsics::_none &&
5416 !method->intrinsic_candidate()) {
5417 tty->print("Compiler intrinsic is defined for method [%s], "
5418 "but the method is not annotated with @IntrinsicCandidate.%s",
5419 method->name_and_sig_as_C_string(),
5420 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5421 );
5422 tty->cr();
5423 DEBUG_ONLY(vm_exit(1));
5424 }
5425 // Check is the method 'method' is annotated with @IntrinsicCandidate,
5426 // but there is no intrinsic available for it.
5427 if (method->intrinsic_candidate() &&
5428 method->intrinsic_id() == vmIntrinsics::_none) {
5429 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
5430 "but no compiler intrinsic is defined for the method.%s",
5431 method->name_and_sig_as_C_string(),
5432 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5433 );
5434 tty->cr();
5435 DEBUG_ONLY(vm_exit(1));
5436 }
5437 }
5438 } // end for
5439
5440 #ifdef ASSERT
5441 if (CheckIntrinsics) {
5442 // Check for orphan methods in the current class. A method m
5443 // of a class C is orphan if an intrinsic is defined for method m,
5444 // but class C does not declare m.
5445 // The check is potentially expensive, therefore it is available
5446 // only in debug builds.
5447
5448 for (auto id : EnumRange<vmIntrinsicID>{}) {
5449 if (vmIntrinsics::_compiledLambdaForm == id) {
5450 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5451 // generated for the JVM from a LambdaForm and therefore no method
5452 // is defined for it.
5453 continue;
5454 }
5455 if (vmIntrinsics::_blackhole == id) {
5456 // The _blackhole intrinsic is a special marker. No explicit method
5457 // is defined for it.
5458 continue;
5459 }
5460
5461 if (vmIntrinsics::class_for(id) == klass_id) {
5462 // Check if the current class contains a method with the same
5463 // name, flags, signature.
5464 bool match = false;
5465 for (int j = 0; j < methods->length(); ++j) {
5466 const Method* method = methods->at(j);
5467 if (method->intrinsic_id() == id) {
5468 match = true;
5469 break;
5470 }
5471 }
5472
5473 if (!match) {
5474 char buf[1000];
5475 tty->print("Compiler intrinsic is defined for method [%s], "
5476 "but the method is not available in class [%s].%s",
5477 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
5478 ik->name()->as_C_string(),
5479 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5480 );
5481 tty->cr();
5482 DEBUG_ONLY(vm_exit(1));
5483 }
5484 }
5485 } // end for
5486 } // CheckIntrinsics
5487 #endif // ASSERT
5488 }
5489 }
5490
5491 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5492 const ClassInstanceInfo& cl_inst_info,
5493 TRAPS) {
5494 if (_klass != NULL) {
5495 return _klass;
5496 }
5497
5498 InstanceKlass* const ik =
5499 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5500
5501 if (is_hidden()) {
5502 mangle_hidden_class_name(ik);
5503 }
5504
5505 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5506
5507 assert(_klass == ik, "invariant");
5508 return ik;
5509 }
5510
5511 // Return true if the specified class is not a valid super class for an inline type.
5512 // A valid super class for an inline type is abstract, has no instance fields,
5513 // does not implement interface java.lang.IdentityObject (checked elsewhere), has
5514 // an empty body-less no-arg constructor, and no synchronized instance methods.
5515 // This function doesn't check if the class's super types are invalid. Those checks
5516 // are done elsewhere. The final determination of whether or not a class is an
5517 // invalid super type for an inline class is done in fill_instance_klass().
5518 bool ClassFileParser::is_invalid_super_for_inline_type() {
5519 if (class_name() == vmSymbols::java_lang_IdentityObject()) {
5520 return true;
5521 }
5522 if (is_interface() || class_name() == vmSymbols::java_lang_Object()) {
5523 return false;
5524 }
5525 if (!access_flags().is_abstract() || _has_nonstatic_fields) {
5526 return true;
5527 } else {
5528 // Look at each method
5529 for (int x = 0; x < _methods->length(); x++) {
5530 const Method* const method = _methods->at(x);
5531 if (method->is_synchronized() && !method->is_static()) {
5532 return true;
5533
5534 } else if (method->name() == vmSymbols::object_initializer_name()) {
5535 if (method->signature() != vmSymbols::void_method_signature() ||
5536 !method->is_vanilla_constructor()) {
5537 return true;
5538 }
5539 }
5540 }
5541 }
5542 return false;
5543 }
5544
5545 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5546 bool changed_by_loadhook,
5547 const ClassInstanceInfo& cl_inst_info,
5548 TRAPS) {
5549 assert(ik != NULL, "invariant");
5550
5551 // Set name and CLD before adding to CLD
5552 ik->set_class_loader_data(_loader_data);
5553 ik->set_name(_class_name);
5554
5555 // Add all classes to our internal class loader list here,
5556 // including classes in the bootstrap (NULL) class loader.
5557 const bool publicize = !is_internal();
5558
5559 _loader_data->add_class(ik, publicize);
5560
5561 set_klass_to_deallocate(ik);
5562
5563 assert(_field_info != NULL, "invariant");
5564 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5565 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5566 "sanity");
5567
5568 assert(ik->is_instance_klass(), "sanity");
5569 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5570
5571 // Fill in information already parsed
5572 ik->set_should_verify_class(_need_verify);
5573
5574 // Not yet: supers are done below to support the new subtype-checking fields
5575 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5576 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5577 if (_field_info->_is_naturally_atomic && ik->is_inline_klass()) {
5578 ik->set_is_naturally_atomic();
5579 }
5580
5581 if (this->_invalid_inline_super) {
5582 ik->set_invalid_inline_super();
5583 }
5584
5585 if (_has_injected_identityObject) {
5586 ik->set_has_injected_identityObject();
5587 }
5588 if (_has_injected_valueObject) {
5589 ik->set_has_injected_primitiveObject();
5590 }
5591
5592 assert(_fac != NULL, "invariant");
5593 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_INLINE]);
5594
5595 // this transfers ownership of a lot of arrays from
5596 // the parser onto the InstanceKlass*
5597 apply_parsed_class_metadata(ik, _java_fields_count);
5598
5599 // can only set dynamic nest-host after static nest information is set
5600 if (cl_inst_info.dynamic_nest_host() != NULL) {
5601 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5602 }
5603
5604 // note that is not safe to use the fields in the parser from this point on
5605 assert(NULL == _cp, "invariant");
5606 assert(NULL == _fields, "invariant");
5607 assert(NULL == _methods, "invariant");
5608 assert(NULL == _inner_classes, "invariant");
5609 assert(NULL == _nest_members, "invariant");
5610 assert(NULL == _combined_annotations, "invariant");
5611 assert(NULL == _record_components, "invariant");
5612 assert(NULL == _permitted_subclasses, "invariant");
5613
5614 if (_has_final_method) {
5615 ik->set_has_final_method();
5616 }
5617
5618 ik->copy_method_ordering(_method_ordering, CHECK);
5619 // The InstanceKlass::_methods_jmethod_ids cache
5620 // is managed on the assumption that the initial cache
5621 // size is equal to the number of methods in the class. If
5622 // that changes, then InstanceKlass::idnum_can_increment()
5623 // has to be changed accordingly.
5624 ik->set_initial_method_idnum(ik->methods()->length());
5625
5626 ik->set_this_class_index(_this_class_index);
5627
5628 if (_is_hidden) {
5629 // _this_class_index is a CONSTANT_Class entry that refers to this
5630 // hidden class itself. If this class needs to refer to its own methods
5631 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5632 // _this_class_index. However, because this class is hidden (it's
5633 // not stored in SystemDictionary), _this_class_index cannot be resolved
5634 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5635 // Therefore, we must eagerly resolve _this_class_index now.
5636 ik->constants()->klass_at_put(_this_class_index, ik);
5637 }
5638
5639 ik->set_minor_version(_minor_version);
5640 ik->set_major_version(_major_version);
5641 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5642 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5643 if (_is_declared_atomic) {
5644 ik->set_is_declared_atomic();
5645 }
5646
5647 if (_is_hidden) {
5648 ik->set_is_hidden();
5649 }
5650
5651 // Set PackageEntry for this_klass
5652 oop cl = ik->class_loader();
5653 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5654 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5655 ik->set_package(cld, NULL, CHECK);
5656
5657 const Array<Method*>* const methods = ik->methods();
5658 assert(methods != NULL, "invariant");
5659 const int methods_len = methods->length();
5660
5661 check_methods_for_intrinsics(ik, methods);
5662
5663 // Fill in field values obtained by parse_classfile_attributes
5664 if (_parsed_annotations->has_any_annotations()) {
5665 _parsed_annotations->apply_to(ik);
5666 }
5667
5668 apply_parsed_class_attributes(ik);
5669
5670 // Miranda methods
5671 if ((_num_miranda_methods > 0) ||
5672 // if this class introduced new miranda methods or
5673 (_super_klass != NULL && _super_klass->has_miranda_methods())
5674 // super class exists and this class inherited miranda methods
5675 ) {
5676 ik->set_has_miranda_methods(); // then set a flag
5677 }
5678
5679 // Fill in information needed to compute superclasses.
5680 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5681 ik->set_transitive_interfaces(_transitive_interfaces);
5682 ik->set_local_interfaces(_local_interfaces);
5683 _transitive_interfaces = NULL;
5684 _local_interfaces = NULL;
5685
5686 // Initialize itable offset tables
5687 klassItable::setup_itable_offset_table(ik);
5688
5689 // Compute transitive closure of interfaces this class implements
5690 // Do final class setup
5691 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5692 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5693 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5694 }
5695
5696 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5697 ( _super_klass != NULL && _super_klass->has_contended_annotations())) {
5698 ik->set_has_contended_annotations(true);
5699 }
5700
5701 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5702 set_precomputed_flags(ik);
5703
5704 // check if this class can access its super class
5705 check_super_class_access(ik, CHECK);
5706
5707 // check if this class can access its superinterfaces
5708 check_super_interface_access(ik, CHECK);
5709
5710 // check if this class overrides any final method
5711 check_final_method_override(ik, CHECK);
5712
5713 // reject static interface methods prior to Java 8
5714 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5715 check_illegal_static_method(ik, CHECK);
5716 }
5717
5718 // Obtain this_klass' module entry
5719 ModuleEntry* module_entry = ik->module();
5720 assert(module_entry != NULL, "module_entry should always be set");
5721
5722 // Obtain java.lang.Module
5723 Handle module_handle(THREAD, module_entry->module());
5724
5725 // Allocate mirror and initialize static fields
5726 // The create_mirror() call will also call compute_modifiers()
5727 java_lang_Class::create_mirror(ik,
5728 Handle(THREAD, _loader_data->class_loader()),
5729 module_handle,
5730 _protection_domain,
5731 cl_inst_info.class_data(),
5732 CHECK);
5733
5734 assert(_all_mirandas != NULL, "invariant");
5735
5736 // Generate any default methods - default methods are public interface methods
5737 // that have a default implementation. This is new with Java 8.
5738 if (_has_nonstatic_concrete_methods) {
5739 DefaultMethods::generate_default_methods(ik,
5740 _all_mirandas,
5741 CHECK);
5742 }
5743
5744 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5745 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5746 !module_entry->has_default_read_edges()) {
5747 if (!module_entry->set_has_default_read_edges()) {
5748 // We won a potential race
5749 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5750 }
5751 }
5752
5753 bool all_fields_empty = true;
5754 for (AllFieldStream fs(ik->fields(), ik->constants()); !fs.done(); fs.next()) {
5755 if (!fs.access_flags().is_static()) {
5756 if (fs.field_descriptor().is_inline_type()) {
5757 Klass* k = _inline_type_field_klasses->at(fs.index());
5758 ik->set_inline_type_field_klass(fs.index(), k);
5759 if (!InlineKlass::cast(k)->is_empty_inline_type()) { all_fields_empty = false; }
5760 } else {
5761 all_fields_empty = false;
5762 }
5763 } else if (is_inline_type() && (fs.name() == vmSymbols::default_value_name())) {
5764 InlineKlass::cast(ik)->set_default_value_offset(ik->field_offset(fs.index()));
5765 }
5766 }
5767
5768 if (_is_empty_inline_type || (is_inline_type() && all_fields_empty)) {
5769 ik->set_is_empty_inline_type();
5770 }
5771
5772 if (is_inline_type()) {
5773 InlineKlass* vk = InlineKlass::cast(ik);
5774 vk->set_alignment(_alignment);
5775 vk->set_first_field_offset(_first_field_offset);
5776 vk->set_exact_size_in_bytes(_exact_size_in_bytes);
5777 InlineKlass::cast(ik)->initialize_calling_convention(CHECK);
5778 }
5779
5780 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5781
5782 if (!is_internal()) {
5783 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5784
5785 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5786 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5787 log_is_enabled(Info, class, preview)) {
5788 ResourceMark rm;
5789 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5790 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5791 }
5792
5793 if (log_is_enabled(Debug, class, resolve)) {
5794 ResourceMark rm;
5795 // print out the superclass.
5796 const char * from = ik->external_name();
5797 if (ik->java_super() != NULL) {
5798 log_debug(class, resolve)("%s %s (super)",
5799 from,
5800 ik->java_super()->external_name());
5801 }
5802 // print out each of the interface classes referred to by this class.
5803 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5804 if (local_interfaces != NULL) {
5805 const int length = local_interfaces->length();
5806 for (int i = 0; i < length; i++) {
5807 const InstanceKlass* const k = local_interfaces->at(i);
5808 const char * to = k->external_name();
5809 log_debug(class, resolve)("%s %s (interface)", from, to);
5810 }
5811 }
5812 }
5813 }
5814
5815 JFR_ONLY(INIT_ID(ik);)
5816
5817 // If we reach here, all is well.
5818 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5819 // in order for it to not be destroyed in the ClassFileParser destructor.
5820 set_klass_to_deallocate(NULL);
5821
5822 // it's official
5823 set_klass(ik);
5824
5825 // the common single interface arrays need setup here to provide the
5826 // correct answer to "compute_transitive_interfaces()", during
5827 // "SystemDictionary::initialize()"
5828 if (ik->name() == vmSymbols::java_lang_IdentityObject()) {
5829 Universe::initialize_the_single_IdentityObject_klass_array(ik, CHECK);
5830 }
5831 if (ik->name() == vmSymbols::java_lang_ValueObject()) {
5832 Universe::initialize_the_single_ValueObject_klass_array(ik, CHECK);
5833 }
5834
5835 debug_only(ik->verify();)
5836 }
5837
5838 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5839 // Decrement the refcount in the old name, since we're clobbering it.
5840 _class_name->decrement_refcount();
5841
5842 _class_name = new_class_name;
5843 // Increment the refcount of the new name.
5844 // Now the ClassFileParser owns this name and will decrement in
5845 // the destructor.
5846 _class_name->increment_refcount();
5847 }
5848
5849 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5850 bool trusted = loader_data->is_boot_class_loader_data() ||
5851 loader_data->is_platform_class_loader_data();
5852 bool need_verify =
5853 // verifyAll
5854 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5855 // verifyRemote
5856 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5857 return !need_verify;
5858 }
5859
5860 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5861 Symbol* name,
5862 ClassLoaderData* loader_data,
5863 const ClassLoadInfo* cl_info,
5864 Publicity pub_level,
5865 TRAPS) :
5866 _stream(stream),
5867 _class_name(NULL),
5868 _loader_data(loader_data),
5869 _is_hidden(cl_info->is_hidden()),
5870 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5871 _orig_cp_size(0),
5872 _super_klass(),
5873 _cp(NULL),
5874 _fields(NULL),
5875 _methods(NULL),
5876 _inner_classes(NULL),
5877 _nest_members(NULL),
5878 _nest_host(0),
5879 _permitted_subclasses(NULL),
5880 _record_components(NULL),
5881 _temp_local_interfaces(NULL),
5882 _local_interfaces(NULL),
5883 _transitive_interfaces(NULL),
5884 _combined_annotations(NULL),
5885 _class_annotations(NULL),
5886 _class_type_annotations(NULL),
5887 _fields_annotations(NULL),
5888 _fields_type_annotations(NULL),
5889 _klass(NULL),
5890 _klass_to_deallocate(NULL),
5891 _parsed_annotations(NULL),
5892 _fac(NULL),
5893 _field_info(NULL),
5894 _inline_type_field_klasses(NULL),
5895 _method_ordering(NULL),
5896 _all_mirandas(NULL),
5897 _vtable_size(0),
5898 _itable_size(0),
5899 _num_miranda_methods(0),
5900 _rt(REF_NONE),
5901 _protection_domain(cl_info->protection_domain()),
5902 _access_flags(),
5903 _pub_level(pub_level),
5904 _bad_constant_seen(0),
5905 _synthetic_flag(false),
5906 _sde_length(false),
5907 _sde_buffer(NULL),
5908 _sourcefile_index(0),
5909 _generic_signature_index(0),
5910 _major_version(0),
5911 _minor_version(0),
5912 _this_class_index(0),
5913 _super_class_index(0),
5914 _itfs_len(0),
5915 _java_fields_count(0),
5916 _need_verify(false),
5917 _relax_verify(false),
5918 _has_nonstatic_concrete_methods(false),
5919 _declares_nonstatic_concrete_methods(false),
5920 _has_final_method(false),
5921 _has_contended_fields(false),
5922 _has_inline_type_fields(false),
5923 _has_nonstatic_fields(false),
5924 _is_empty_inline_type(false),
5925 _is_naturally_atomic(false),
5926 _is_declared_atomic(false),
5927 _invalid_inline_super(false),
5928 _invalid_identity_super(false),
5929 _implements_identityObject(false),
5930 _has_injected_identityObject(false),
5931 _implements_valueObject(false),
5932 _has_injected_valueObject(false),
5933 _has_finalizer(false),
5934 _has_empty_finalizer(false),
5935 _has_vanilla_constructor(false),
5936 _max_bootstrap_specifier_index(-1) {
5937
5938 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5939 _class_name->increment_refcount();
5940
5941 assert(_loader_data != NULL, "invariant");
5942 assert(stream != NULL, "invariant");
5943 assert(_stream != NULL, "invariant");
5944 assert(_stream->buffer() == _stream->current(), "invariant");
5945 assert(_class_name != NULL, "invariant");
5946 assert(0 == _access_flags.as_int(), "invariant");
5947
5948 // Figure out whether we can skip format checking (matching classic VM behavior)
5949 if (DumpSharedSpaces) {
5950 // verify == true means it's a 'remote' class (i.e., non-boot class)
5951 // Verification decision is based on BytecodeVerificationRemote flag
5952 // for those classes.
5953 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5954 BytecodeVerificationLocal;
5955 }
5956 else {
5957 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5958 stream->need_verify());
5959 }
5960
5961 // synch back verification state to stream
5962 stream->set_verify(_need_verify);
5963
5964 // Check if verification needs to be relaxed for this class file
5965 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5966 _relax_verify = relax_format_check_for(_loader_data);
5967
5968 parse_stream(stream, CHECK);
5969
5970 post_process_parsed_stream(stream, _cp, CHECK);
5971 }
5972
5973 void ClassFileParser::clear_class_metadata() {
5974 // metadata created before the instance klass is created. Must be
5975 // deallocated if classfile parsing returns an error.
5976 _cp = NULL;
5977 _fields = NULL;
5978 _methods = NULL;
5979 _inner_classes = NULL;
5980 _nest_members = NULL;
5981 _permitted_subclasses = NULL;
5982 _combined_annotations = NULL;
5983 _class_annotations = _class_type_annotations = NULL;
5984 _fields_annotations = _fields_type_annotations = NULL;
5985 _record_components = NULL;
5986 }
5987
5988 // Destructor to clean up
5989 ClassFileParser::~ClassFileParser() {
5990 _class_name->decrement_refcount();
5991
5992 if (_cp != NULL) {
5993 MetadataFactory::free_metadata(_loader_data, _cp);
5994 }
5995 if (_fields != NULL) {
5996 MetadataFactory::free_array<u2>(_loader_data, _fields);
5997 }
5998
5999 if (_inline_type_field_klasses != NULL) {
6000 MetadataFactory::free_array<InlineKlass*>(_loader_data, _inline_type_field_klasses);
6001 }
6002
6003 if (_methods != NULL) {
6004 // Free methods
6005 InstanceKlass::deallocate_methods(_loader_data, _methods);
6006 }
6007
6008 // beware of the Universe::empty_blah_array!!
6009 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6010 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6011 }
6012
6013 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
6014 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
6015 }
6016
6017 if (_record_components != NULL) {
6018 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
6019 }
6020
6021 if (_permitted_subclasses != NULL && _permitted_subclasses != Universe::the_empty_short_array()) {
6022 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
6023 }
6024
6025 // Free interfaces
6026 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6027 _local_interfaces, _transitive_interfaces);
6028
6029 if (_combined_annotations != NULL) {
6030 // After all annotations arrays have been created, they are installed into the
6031 // Annotations object that will be assigned to the InstanceKlass being created.
6032
6033 // Deallocate the Annotations object and the installed annotations arrays.
6034 _combined_annotations->deallocate_contents(_loader_data);
6035
6036 // If the _combined_annotations pointer is non-NULL,
6037 // then the other annotations fields should have been cleared.
6038 assert(_class_annotations == NULL, "Should have been cleared");
6039 assert(_class_type_annotations == NULL, "Should have been cleared");
6040 assert(_fields_annotations == NULL, "Should have been cleared");
6041 assert(_fields_type_annotations == NULL, "Should have been cleared");
6042 } else {
6043 // If the annotations arrays were not installed into the Annotations object,
6044 // then they have to be deallocated explicitly.
6045 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
6046 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
6047 Annotations::free_contents(_loader_data, _fields_annotations);
6048 Annotations::free_contents(_loader_data, _fields_type_annotations);
6049 }
6050
6051 clear_class_metadata();
6052 _transitive_interfaces = NULL;
6053 _local_interfaces = NULL;
6054
6055 // deallocate the klass if already created. Don't directly deallocate, but add
6056 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6057 // at a safepoint.
6058 if (_klass_to_deallocate != NULL) {
6059 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6060 }
6061 }
6062
6063 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6064 TRAPS) {
6065
6066 assert(stream != NULL, "invariant");
6067 assert(_class_name != NULL, "invariant");
6068
6069 // BEGIN STREAM PARSING
6070 stream->guarantee_more(8, CHECK); // magic, major, minor
6071 // Magic value
6072 const u4 magic = stream->get_u4_fast();
6073 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6074 "Incompatible magic value %u in class file %s",
6075 magic, CHECK);
6076
6077 // Version numbers
6078 _minor_version = stream->get_u2_fast();
6079 _major_version = stream->get_u2_fast();
6080
6081 // Check version numbers - we check this even with verifier off
6082 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6083
6084 stream->guarantee_more(3, CHECK); // length, first cp tag
6085 u2 cp_size = stream->get_u2_fast();
6086
6087 guarantee_property(
6088 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6089 cp_size, CHECK);
6090
6091 _orig_cp_size = cp_size;
6092 if (is_hidden()) { // Add a slot for hidden class name.
6093 cp_size++;
6094 }
6095
6096 _cp = ConstantPool::allocate(_loader_data,
6097 cp_size,
6098 CHECK);
6099
6100 ConstantPool* const cp = _cp;
6101
6102 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6103
6104 assert(cp_size == (const u2)cp->length(), "invariant");
6105
6106 // ACCESS FLAGS
6107 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6108
6109 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6110 // JVM_ACC_MODULE is defined in JDK-9 and later.
6111 if (_major_version >= JAVA_9_VERSION) {
6112 recognized_modifiers |= JVM_ACC_MODULE;
6113 }
6114 // JVM_ACC_INLINE is defined for class file version 55 and later
6115 if (supports_inline_types()) {
6116 recognized_modifiers |= JVM_ACC_INLINE | JVM_ACC_VALUE;
6117 }
6118
6119 // Access flags
6120 jint flags = stream->get_u2_fast() & recognized_modifiers;
6121
6122 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6123 // Set abstract bit for old class files for backward compatibility
6124 flags |= JVM_ACC_ABSTRACT;
6125 }
6126
6127 verify_legal_class_modifiers(flags, CHECK);
6128
6129 short bad_constant = class_bad_constant_seen();
6130 if (bad_constant != 0) {
6131 // Do not throw CFE until after the access_flags are checked because if
6132 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6133 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
6134 return;
6135 }
6136
6137 _access_flags.set_flags(flags);
6138
6139 // This class and superclass
6140 _this_class_index = stream->get_u2_fast();
6141 check_property(
6142 valid_cp_range(_this_class_index, cp_size) &&
6143 cp->tag_at(_this_class_index).is_unresolved_klass(),
6144 "Invalid this class index %u in constant pool in class file %s",
6145 _this_class_index, CHECK);
6146
6147 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6148 assert(class_name_in_cp != NULL, "class_name can't be null");
6149
6150 // Don't need to check whether this class name is legal or not.
6151 // It has been checked when constant pool is parsed.
6152 // However, make sure it is not an array type.
6153 if (_need_verify) {
6154 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
6155 "Bad class name in class file %s",
6156 CHECK);
6157 }
6158
6159 #ifdef ASSERT
6160 // Basic sanity checks
6161 if (_is_hidden) {
6162 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
6163 }
6164 #endif
6165
6166 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
6167
6168 if (_is_hidden) {
6169 assert(_class_name != NULL, "Unexpected null _class_name");
6170 #ifdef ASSERT
6171 if (_need_verify) {
6172 verify_legal_class_name(_class_name, CHECK);
6173 }
6174 #endif
6175
6176 } else {
6177 // Check if name in class file matches given name
6178 if (_class_name != class_name_in_cp) {
6179 if (_class_name != vmSymbols::unknown_class_name()) {
6180 ResourceMark rm(THREAD);
6181 Exceptions::fthrow(THREAD_AND_LOCATION,
6182 vmSymbols::java_lang_NoClassDefFoundError(),
6183 "%s (wrong name: %s)",
6184 class_name_in_cp->as_C_string(),
6185 _class_name->as_C_string()
6186 );
6187 return;
6188 } else {
6189 // The class name was not known by the caller so we set it from
6190 // the value in the CP.
6191 update_class_name(class_name_in_cp);
6192 }
6193 // else nothing to do: the expected class name matches what is in the CP
6194 }
6195 }
6196
6197 // Verification prevents us from creating names with dots in them, this
6198 // asserts that that's the case.
6199 assert(is_internal_format(_class_name), "external class name format used internally");
6200
6201 if (!is_internal()) {
6202 LogTarget(Debug, class, preorder) lt;
6203 if (lt.is_enabled()){
6204 ResourceMark rm(THREAD);
6205 LogStream ls(lt);
6206 ls.print("%s", _class_name->as_klass_external_name());
6207 if (stream->source() != NULL) {
6208 ls.print(" source: %s", stream->source());
6209 }
6210 ls.cr();
6211 }
6212 }
6213
6214 // SUPERKLASS
6215 _super_class_index = stream->get_u2_fast();
6216 _super_klass = parse_super_class(cp,
6217 _super_class_index,
6218 _need_verify,
6219 CHECK);
6220
6221 // Interfaces
6222 _itfs_len = stream->get_u2_fast();
6223 parse_interfaces(stream,
6224 _itfs_len,
6225 cp,
6226 &_has_nonstatic_concrete_methods,
6227 &_is_declared_atomic,
6228 CHECK);
6229
6230 assert(_temp_local_interfaces != NULL, "invariant");
6231
6232 // Fields (offsets are filled in later)
6233 _fac = new FieldAllocationCount();
6234 parse_fields(stream,
6235 is_interface(),
6236 is_inline_type(),
6237 _fac,
6238 cp,
6239 cp_size,
6240 &_java_fields_count,
6241 CHECK);
6242
6243 assert(_fields != NULL, "invariant");
6244
6245 // Methods
6246 AccessFlags promoted_flags;
6247 parse_methods(stream,
6248 is_interface(),
6249 is_inline_type(),
6250 &promoted_flags,
6251 &_has_final_method,
6252 &_declares_nonstatic_concrete_methods,
6253 CHECK);
6254
6255 assert(_methods != NULL, "invariant");
6256
6257 // promote flags from parse_methods() to the klass' flags
6258 _access_flags.add_promoted_flags(promoted_flags.as_int());
6259
6260 if (_declares_nonstatic_concrete_methods) {
6261 _has_nonstatic_concrete_methods = true;
6262 }
6263
6264 // Additional attributes/annotations
6265 _parsed_annotations = new ClassAnnotationCollector();
6266 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6267
6268 assert(_inner_classes != NULL, "invariant");
6269
6270 // Finalize the Annotations metadata object,
6271 // now that all annotation arrays have been created.
6272 create_combined_annotations(CHECK);
6273
6274 // Make sure this is the end of class file stream
6275 guarantee_property(stream->at_eos(),
6276 "Extra bytes at the end of class file %s",
6277 CHECK);
6278
6279 // all bytes in stream read and parsed
6280 }
6281
6282 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
6283 ResourceMark rm;
6284 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
6285 // use a '/' because that confuses finding the class's package. Also, can't
6286 // use an illegal char such as ';' because that causes serialization issues
6287 // and issues with hidden classes that create their own hidden classes.
6288 char addr_buf[20];
6289 if (DumpSharedSpaces) {
6290 // We want stable names for the archived hidden classes (only for static
6291 // archive for now). Spaces under default_SharedBaseAddress() will be
6292 // occupied by the archive at run time, so we know that no dynamically
6293 // loaded InstanceKlass will be placed under there.
6294 static volatile size_t counter = 0;
6295 Atomic::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
6296 size_t new_id = Atomic::add(&counter, (size_t)1);
6297 jio_snprintf(addr_buf, 20, SIZE_FORMAT_HEX, new_id);
6298 } else {
6299 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
6300 }
6301 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
6302 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
6303 jio_snprintf(new_name, new_name_len, "%s+%s",
6304 _class_name->as_C_string(), addr_buf);
6305 update_class_name(SymbolTable::new_symbol(new_name));
6306
6307 // Add a Utf8 entry containing the hidden name.
6308 assert(_class_name != NULL, "Unexpected null _class_name");
6309 int hidden_index = _orig_cp_size; // this is an extra slot we added
6310 _cp->symbol_at_put(hidden_index, _class_name);
6311
6312 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
6313 // We have to update the resolved_klass_index and the name_index together
6314 // so extract the existing resolved_klass_index first.
6315 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
6316 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
6317 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
6318 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
6319 "Bad name_index");
6320 }
6321
6322 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6323 ConstantPool* cp,
6324 TRAPS) {
6325 assert(stream != NULL, "invariant");
6326 assert(stream->at_eos(), "invariant");
6327 assert(cp != NULL, "invariant");
6328 assert(_loader_data != NULL, "invariant");
6329
6330 if (_class_name == vmSymbols::java_lang_Object()) {
6331 check_property(_temp_local_interfaces->length() == 0,
6332 "java.lang.Object cannot implement an interface in class file %s",
6333 CHECK);
6334 }
6335 // We check super class after class file is parsed and format is checked
6336 if (_super_class_index > 0 && NULL == _super_klass) {
6337 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6338 if (is_interface()) {
6339 // Before attempting to resolve the superclass, check for class format
6340 // errors not checked yet.
6341 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6342 "Interfaces must have java.lang.Object as superclass in class file %s",
6343 CHECK);
6344 }
6345 Handle loader(THREAD, _loader_data->class_loader());
6346 _super_klass = (const InstanceKlass*)
6347 SystemDictionary::resolve_super_or_fail(_class_name,
6348 super_class_name,
6349 loader,
6350 _protection_domain,
6351 true,
6352 CHECK);
6353 }
6354
6355 if (_super_klass != NULL) {
6356 if (_super_klass->has_nonstatic_concrete_methods()) {
6357 _has_nonstatic_concrete_methods = true;
6358 }
6359 if (_super_klass->is_declared_atomic()) {
6360 _is_declared_atomic = true;
6361 }
6362
6363 if (_super_klass->is_interface()) {
6364 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
6365 return;
6366 }
6367
6368 // For an inline class, only java/lang/Object or special abstract classes
6369 // are acceptable super classes.
6370 if (is_inline_type()) {
6371 const InstanceKlass* super_ik = _super_klass;
6372 if (super_ik->invalid_inline_super()) {
6373 classfile_icce_error("inline class %s has an invalid super class %s", _super_klass, THREAD);
6374 return;
6375 }
6376 }
6377 }
6378
6379 if (_class_name == vmSymbols::java_lang_NonTearable() && _loader_data->class_loader() == NULL) {
6380 // This is the original source of this condition.
6381 // It propagates by inheritance, as if testing "instanceof NonTearable".
6382 _is_declared_atomic = true;
6383 } else if (*ForceNonTearable != '\0') {
6384 // Allow a command line switch to force the same atomicity property:
6385 const char* class_name_str = _class_name->as_C_string();
6386 if (StringUtils::class_list_match(ForceNonTearable, class_name_str)) {
6387 _is_declared_atomic = true;
6388 }
6389 }
6390
6391 // Set ik->invalid_inline_super field to TRUE if already marked as invalid,
6392 // if super is marked invalid, or if is_invalid_super_for_inline_type()
6393 // returns true
6394 if (invalid_inline_super() ||
6395 (_super_klass != NULL && _super_klass->invalid_inline_super()) ||
6396 is_invalid_super_for_inline_type()) {
6397 set_invalid_inline_super();
6398 }
6399
6400 if (EnableValhalla && !is_inline_type() && invalid_inline_super() && (_super_klass == NULL || !_super_klass->invalid_inline_super())
6401 && !_implements_identityObject && class_name() != vmSymbols::java_lang_IdentityObject()) {
6402 _temp_local_interfaces->append(vmClasses::IdentityObject_klass());
6403 _has_injected_identityObject = true;
6404 }
6405 // Check if declared as PrimitiveObject...else add if needed
6406 if (_implements_valueObject) {
6407 if (!is_inline_type() && invalid_inline_super()) {
6408 classfile_icce_error("class %s can not implement %s, neither valid inline classes or valid supertype",
6409 vmClasses::ValueObject_klass(), THREAD);
6410 return;
6411 }
6412 } else if (is_inline_type()) {
6413 _temp_local_interfaces->append(vmClasses::ValueObject_klass());
6414 _has_injected_valueObject = true;
6415 }
6416
6417 int itfs_len = _temp_local_interfaces->length();
6418 if (itfs_len == 0) {
6419 _local_interfaces = Universe::the_empty_instance_klass_array();
6420 } else if (itfs_len == 1 && _temp_local_interfaces->at(0) == vmClasses::IdentityObject_klass()) {
6421 _local_interfaces = Universe::the_single_IdentityObject_klass_array();
6422 } else if (itfs_len == 1 && _temp_local_interfaces->at(0) == vmClasses::ValueObject_klass()) {
6423 _local_interfaces = Universe::the_single_ValueObject_klass_array();
6424 } else {
6425 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
6426 for (int i = 0; i < itfs_len; i++) {
6427 _local_interfaces->at_put(i, _temp_local_interfaces->at(i));
6428 }
6429 }
6430 _temp_local_interfaces = NULL;
6431 assert(_local_interfaces != NULL, "invariant");
6432
6433 // Compute the transitive list of all unique interfaces implemented by this class
6434 _transitive_interfaces =
6435 compute_transitive_interfaces(_super_klass,
6436 _local_interfaces,
6437 _loader_data,
6438 CHECK);
6439
6440 assert(_transitive_interfaces != NULL, "invariant");
6441
6442 // sort methods
6443 _method_ordering = sort_methods(_methods);
6444
6445 _all_mirandas = new GrowableArray<Method*>(20);
6446
6447 Handle loader(THREAD, _loader_data->class_loader());
6448 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6449 &_num_miranda_methods,
6450 _all_mirandas,
6451 _super_klass,
6452 _methods,
6453 _access_flags,
6454 _major_version,
6455 loader,
6456 _class_name,
6457 _local_interfaces);
6458
6459 // Size of Java itable (in words)
6460 _itable_size = is_interface() ? 0 :
6461 klassItable::compute_itable_size(_transitive_interfaces);
6462
6463 assert(_fac != NULL, "invariant");
6464 assert(_parsed_annotations != NULL, "invariant");
6465
6466
6467 if (EnableValhalla) {
6468 _inline_type_field_klasses = MetadataFactory::new_array<InlineKlass*>(_loader_data,
6469 java_fields_count(),
6470 NULL,
6471 CHECK);
6472 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
6473 if (Signature::basic_type(fs.signature()) == T_INLINE_TYPE && !fs.access_flags().is_static()) {
6474 // Pre-load inline class
6475 Klass* klass = SystemDictionary::resolve_inline_type_field_or_fail(&fs,
6476 Handle(THREAD, _loader_data->class_loader()),
6477 _protection_domain, true, CHECK);
6478 assert(klass != NULL, "Sanity check");
6479 if (!klass->access_flags().is_inline_type()) {
6480 assert(klass->is_instance_klass(), "Sanity check");
6481 ResourceMark rm(THREAD);
6482 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
6483 err_msg("Class %s expects class %s to be an inline type, but it is not",
6484 _class_name->as_C_string(),
6485 InstanceKlass::cast(klass)->external_name()));
6486 }
6487 _inline_type_field_klasses->at_put(fs.index(), InlineKlass::cast(klass));
6488 }
6489 }
6490 }
6491
6492 _field_info = new FieldLayoutInfo();
6493 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, _fields,
6494 _parsed_annotations->is_contended(), is_inline_type(),
6495 _field_info, _inline_type_field_klasses);
6496 lb.build_layout(CHECK);
6497 if (is_inline_type()) {
6498 _alignment = lb.get_alignment();
6499 _first_field_offset = lb.get_first_field_offset();
6500 _exact_size_in_bytes = lb.get_exact_size_in_byte();
6501 }
6502 _has_inline_type_fields = _field_info->_has_inline_fields;
6503
6504 // Compute reference type
6505 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6506 }
6507
6508 void ClassFileParser::set_klass(InstanceKlass* klass) {
6509
6510 #ifdef ASSERT
6511 if (klass != NULL) {
6512 assert(NULL == _klass, "leaking?");
6513 }
6514 #endif
6515
6516 _klass = klass;
6517 }
6518
6519 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6520
6521 #ifdef ASSERT
6522 if (klass != NULL) {
6523 assert(NULL == _klass_to_deallocate, "leaking?");
6524 }
6525 #endif
6526
6527 _klass_to_deallocate = klass;
6528 }
6529
6530 // Caller responsible for ResourceMark
6531 // clone stream with rewound position
6532 const ClassFileStream* ClassFileParser::clone_stream() const {
6533 assert(_stream != NULL, "invariant");
6534
6535 return _stream->clone();
6536 }
6537
6538 // ----------------------------------------------------------------------------
6539 // debugging
6540
6541 #ifdef ASSERT
6542
6543 // return true if class_name contains no '.' (internal format is '/')
6544 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6545 if (class_name != NULL) {
6546 ResourceMark rm;
6547 char* name = class_name->as_C_string();
6548 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6549 } else {
6550 return true;
6551 }
6552 }
6553
6554 #endif