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 JAVA_19_VERSION 63
146
147 #define JAVA_20_VERSION 64
148
149 #define CONSTANT_CLASS_DESCRIPTORS 64
150
151 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
152 assert((bad_constant == JVM_CONSTANT_Module ||
153 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
154 "Unexpected bad constant pool entry");
155 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
156 }
157
158 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
159 ConstantPool* cp,
160 const int length,
161 TRAPS) {
162 assert(stream != NULL, "invariant");
163 assert(cp != NULL, "invariant");
164
165 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
166 // this function (_current can be allocated in a register, with scalar
167 // replacement of aggregates). The _current pointer is copied back to
168 // stream() when this function returns. DON'T call another method within
169 // this method that uses stream().
170 const ClassFileStream cfs1 = *stream;
171 const ClassFileStream* const cfs = &cfs1;
172
173 assert(cfs->allocated_on_stack_or_embedded(), "should be local");
174 debug_only(const u1* const old_current = stream->current();)
175
176 // Used for batching symbol allocations.
177 const char* names[SymbolTable::symbol_alloc_batch_size];
178 int lengths[SymbolTable::symbol_alloc_batch_size];
179 int indices[SymbolTable::symbol_alloc_batch_size];
180 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
181 int names_count = 0;
182
183 // parsing Index 0 is unused
184 for (int index = 1; index < length; index++) {
185 // Each of the following case guarantees one more byte in the stream
186 // for the following tag or the access_flags following constant pool,
187 // so we don't need bounds-check for reading tag.
188 const u1 tag = cfs->get_u1_fast();
189 switch (tag) {
190 case JVM_CONSTANT_Class: {
191 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
192 const u2 name_index = cfs->get_u2_fast();
193 cp->klass_index_at_put(index, name_index);
194 break;
195 }
196 case JVM_CONSTANT_Fieldref: {
197 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
198 const u2 class_index = cfs->get_u2_fast();
199 const u2 name_and_type_index = cfs->get_u2_fast();
200 cp->field_at_put(index, class_index, name_and_type_index);
201 break;
202 }
203 case JVM_CONSTANT_Methodref: {
204 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
205 const u2 class_index = cfs->get_u2_fast();
206 const u2 name_and_type_index = cfs->get_u2_fast();
207 cp->method_at_put(index, class_index, name_and_type_index);
208 break;
209 }
210 case JVM_CONSTANT_InterfaceMethodref: {
211 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
212 const u2 class_index = cfs->get_u2_fast();
213 const u2 name_and_type_index = cfs->get_u2_fast();
214 cp->interface_method_at_put(index, class_index, name_and_type_index);
215 break;
216 }
217 case JVM_CONSTANT_String : {
218 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
219 const u2 string_index = cfs->get_u2_fast();
220 cp->string_index_at_put(index, string_index);
221 break;
222 }
223 case JVM_CONSTANT_MethodHandle :
224 case JVM_CONSTANT_MethodType: {
225 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
226 classfile_parse_error(
227 "Class file version does not support constant tag %u in class file %s",
228 tag, THREAD);
229 return;
230 }
231 if (tag == JVM_CONSTANT_MethodHandle) {
232 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
233 const u1 ref_kind = cfs->get_u1_fast();
234 const u2 method_index = cfs->get_u2_fast();
235 cp->method_handle_index_at_put(index, ref_kind, method_index);
236 }
237 else if (tag == JVM_CONSTANT_MethodType) {
238 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
239 const u2 signature_index = cfs->get_u2_fast();
240 cp->method_type_index_at_put(index, signature_index);
241 }
242 else {
243 ShouldNotReachHere();
244 }
245 break;
246 }
247 case JVM_CONSTANT_Dynamic : {
248 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
249 classfile_parse_error(
250 "Class file version does not support constant tag %u in class file %s",
251 tag, THREAD);
252 return;
253 }
254 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
255 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
256 const u2 name_and_type_index = cfs->get_u2_fast();
257 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
258 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
259 }
260 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
261 break;
262 }
263 case JVM_CONSTANT_InvokeDynamic : {
264 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
265 classfile_parse_error(
266 "Class file version does not support constant tag %u in class file %s",
267 tag, THREAD);
268 return;
269 }
270 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
271 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
272 const u2 name_and_type_index = cfs->get_u2_fast();
273 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
274 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
275 }
276 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
277 break;
278 }
279 case JVM_CONSTANT_Integer: {
280 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
281 const u4 bytes = cfs->get_u4_fast();
282 cp->int_at_put(index, (jint)bytes);
283 break;
284 }
285 case JVM_CONSTANT_Float: {
286 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
287 const u4 bytes = cfs->get_u4_fast();
288 cp->float_at_put(index, *(jfloat*)&bytes);
289 break;
290 }
291 case JVM_CONSTANT_Long: {
292 // A mangled type might cause you to overrun allocated memory
293 guarantee_property(index + 1 < length,
294 "Invalid constant pool entry %u in class file %s",
295 index,
296 CHECK);
297 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
298 const u8 bytes = cfs->get_u8_fast();
299 cp->long_at_put(index, bytes);
300 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
301 break;
302 }
303 case JVM_CONSTANT_Double: {
304 // A mangled type might cause you to overrun allocated memory
305 guarantee_property(index+1 < length,
306 "Invalid constant pool entry %u in class file %s",
307 index,
308 CHECK);
309 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
310 const u8 bytes = cfs->get_u8_fast();
311 cp->double_at_put(index, *(jdouble*)&bytes);
312 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
313 break;
314 }
315 case JVM_CONSTANT_NameAndType: {
316 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
317 const u2 name_index = cfs->get_u2_fast();
318 const u2 signature_index = cfs->get_u2_fast();
319 cp->name_and_type_at_put(index, name_index, signature_index);
320 break;
321 }
322 case JVM_CONSTANT_Utf8 : {
323 cfs->guarantee_more(2, CHECK); // utf8_length
324 u2 utf8_length = cfs->get_u2_fast();
325 const u1* utf8_buffer = cfs->current();
326 assert(utf8_buffer != NULL, "null utf8 buffer");
327 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
328 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
329 cfs->skip_u1_fast(utf8_length);
330
331 // Before storing the symbol, make sure it's legal
332 if (_need_verify) {
333 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
334 }
335
336 unsigned int hash;
337 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
338 utf8_length,
339 hash);
340 if (result == NULL) {
341 names[names_count] = (const char*)utf8_buffer;
342 lengths[names_count] = utf8_length;
343 indices[names_count] = index;
344 hashValues[names_count++] = hash;
345 if (names_count == SymbolTable::symbol_alloc_batch_size) {
346 SymbolTable::new_symbols(_loader_data,
347 constantPoolHandle(THREAD, cp),
348 names_count,
349 names,
350 lengths,
351 indices,
352 hashValues);
353 names_count = 0;
354 }
355 } else {
356 cp->symbol_at_put(index, result);
357 }
358 break;
359 }
360 case JVM_CONSTANT_Module:
361 case JVM_CONSTANT_Package: {
362 // Record that an error occurred in these two cases but keep parsing so
363 // that ACC_Module can be checked for in the access_flags. Need to
364 // throw NoClassDefFoundError in that case.
365 if (_major_version >= JAVA_9_VERSION) {
366 cfs->guarantee_more(3, CHECK);
367 cfs->get_u2_fast();
368 set_class_bad_constant_seen(tag);
369 break;
370 }
371 }
372 default: {
373 classfile_parse_error("Unknown constant tag %u in class file %s",
374 tag,
375 THREAD);
376 return;
377 }
378 } // end of switch(tag)
379 } // end of for
380
381 // Allocate the remaining symbols
382 if (names_count > 0) {
383 SymbolTable::new_symbols(_loader_data,
384 constantPoolHandle(THREAD, cp),
385 names_count,
386 names,
387 lengths,
388 indices,
389 hashValues);
390 }
391
392 // Copy _current pointer of local copy back to stream.
393 assert(stream->current() == old_current, "non-exclusive use of stream");
394 stream->set_current(cfs1.current());
395
396 }
397
398 static inline bool valid_cp_range(int index, int length) {
399 return (index > 0 && index < length);
400 }
401
402 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
403 assert(cp != NULL, "invariant");
404 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
405 return cp->symbol_at(index);
406 }
407 return NULL;
408 }
409
410 #ifdef ASSERT
411 PRAGMA_DIAG_PUSH
412 PRAGMA_FORMAT_NONLITERAL_IGNORED
413 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
414 ResourceMark rm(THREAD);
415 fatal(msg, _class_name->as_C_string());
416 }
417
418 void ClassFileParser::report_assert_property_failure(const char* msg,
419 int index,
420 TRAPS) const {
421 ResourceMark rm(THREAD);
422 fatal(msg, index, _class_name->as_C_string());
423 }
424 PRAGMA_DIAG_POP
425 #endif
426
427 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
428 ConstantPool* const cp,
429 const int length,
430 TRAPS) {
431 assert(cp != NULL, "invariant");
432 assert(stream != NULL, "invariant");
433
434 // parsing constant pool entries
435 parse_constant_pool_entries(stream, cp, length, CHECK);
436 if (class_bad_constant_seen() != 0) {
437 // a bad CP entry has been detected previously so stop parsing and just return.
438 return;
439 }
440
441 int index = 1; // declared outside of loops for portability
442 int num_klasses = 0;
443
444 // first verification pass - validate cross references
445 // and fixup class and string constants
446 for (index = 1; index < length; index++) { // Index 0 is unused
447 const jbyte tag = cp->tag_at(index).value();
448 switch (tag) {
449 case JVM_CONSTANT_Class: {
450 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
451 break;
452 }
453 case JVM_CONSTANT_Fieldref:
454 // fall through
455 case JVM_CONSTANT_Methodref:
456 // fall through
457 case JVM_CONSTANT_InterfaceMethodref: {
458 if (!_need_verify) break;
459 const int klass_ref_index = cp->klass_ref_index_at(index);
460 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
461 check_property(valid_klass_reference_at(klass_ref_index),
462 "Invalid constant pool index %u in class file %s",
463 klass_ref_index, CHECK);
464 check_property(valid_cp_range(name_and_type_ref_index, length) &&
465 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
466 "Invalid constant pool index %u in class file %s",
467 name_and_type_ref_index, CHECK);
468 break;
469 }
470 case JVM_CONSTANT_String: {
471 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
472 break;
473 }
474 case JVM_CONSTANT_Integer:
475 break;
476 case JVM_CONSTANT_Float:
477 break;
478 case JVM_CONSTANT_Long:
479 case JVM_CONSTANT_Double: {
480 index++;
481 check_property(
482 (index < length && cp->tag_at(index).is_invalid()),
483 "Improper constant pool long/double index %u in class file %s",
484 index, CHECK);
485 break;
486 }
487 case JVM_CONSTANT_NameAndType: {
488 if (!_need_verify) break;
489 const int name_ref_index = cp->name_ref_index_at(index);
490 const int signature_ref_index = cp->signature_ref_index_at(index);
491 check_property(valid_symbol_at(name_ref_index),
492 "Invalid constant pool index %u in class file %s",
493 name_ref_index, CHECK);
494 check_property(valid_symbol_at(signature_ref_index),
495 "Invalid constant pool index %u in class file %s",
496 signature_ref_index, CHECK);
497 break;
498 }
499 case JVM_CONSTANT_Utf8:
500 break;
501 case JVM_CONSTANT_UnresolvedClass: // fall-through
502 case JVM_CONSTANT_UnresolvedClassInError: {
503 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
504 break;
505 }
506 case JVM_CONSTANT_ClassIndex: {
507 const int class_index = cp->klass_index_at(index);
508 check_property(valid_symbol_at(class_index),
509 "Invalid constant pool index %u in class file %s",
510 class_index, CHECK);
511
512 Symbol* const name = cp->symbol_at(class_index);
513 const unsigned int name_len = name->utf8_length();
514 if (name->is_Q_signature()) {
515 cp->unresolved_qdescriptor_at_put(index, class_index, num_klasses++);
516 } else {
517 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
518 }
519 break;
520 }
521 case JVM_CONSTANT_StringIndex: {
522 const int string_index = cp->string_index_at(index);
523 check_property(valid_symbol_at(string_index),
524 "Invalid constant pool index %u in class file %s",
525 string_index, CHECK);
526 Symbol* const sym = cp->symbol_at(string_index);
527 cp->unresolved_string_at_put(index, sym);
528 break;
529 }
530 case JVM_CONSTANT_MethodHandle: {
531 const int ref_index = cp->method_handle_index_at(index);
532 check_property(valid_cp_range(ref_index, length),
533 "Invalid constant pool index %u in class file %s",
534 ref_index, CHECK);
535 const constantTag tag = cp->tag_at(ref_index);
536 const int ref_kind = cp->method_handle_ref_kind_at(index);
537
538 switch (ref_kind) {
539 case JVM_REF_getField:
540 case JVM_REF_getStatic:
541 case JVM_REF_putField:
542 case JVM_REF_putStatic: {
543 check_property(
544 tag.is_field(),
545 "Invalid constant pool index %u in class file %s (not a field)",
546 ref_index, CHECK);
547 break;
548 }
549 case JVM_REF_invokeVirtual:
550 case JVM_REF_newInvokeSpecial: {
551 check_property(
552 tag.is_method(),
553 "Invalid constant pool index %u in class file %s (not a method)",
554 ref_index, CHECK);
555 break;
556 }
557 case JVM_REF_invokeStatic:
558 case JVM_REF_invokeSpecial: {
559 check_property(
560 tag.is_method() ||
561 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
562 "Invalid constant pool index %u in class file %s (not a method)",
563 ref_index, CHECK);
564 break;
565 }
566 case JVM_REF_invokeInterface: {
567 check_property(
568 tag.is_interface_method(),
569 "Invalid constant pool index %u in class file %s (not an interface method)",
570 ref_index, CHECK);
571 break;
572 }
573 default: {
574 classfile_parse_error(
575 "Bad method handle kind at constant pool index %u in class file %s",
576 index, THREAD);
577 return;
578 }
579 } // switch(refkind)
580 // Keep the ref_index unchanged. It will be indirected at link-time.
581 break;
582 } // case MethodHandle
583 case JVM_CONSTANT_MethodType: {
584 const int ref_index = cp->method_type_index_at(index);
585 check_property(valid_symbol_at(ref_index),
586 "Invalid constant pool index %u in class file %s",
587 ref_index, CHECK);
588 break;
589 }
590 case JVM_CONSTANT_Dynamic: {
591 const int name_and_type_ref_index =
592 cp->bootstrap_name_and_type_ref_index_at(index);
593
594 check_property(valid_cp_range(name_and_type_ref_index, length) &&
595 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
596 "Invalid constant pool index %u in class file %s",
597 name_and_type_ref_index, CHECK);
598 // bootstrap specifier index must be checked later,
599 // when BootstrapMethods attr is available
600
601 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
602 cp->set_has_dynamic_constant();
603 break;
604 }
605 case JVM_CONSTANT_InvokeDynamic: {
606 const int name_and_type_ref_index =
607 cp->bootstrap_name_and_type_ref_index_at(index);
608
609 check_property(valid_cp_range(name_and_type_ref_index, length) &&
610 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
611 "Invalid constant pool index %u in class file %s",
612 name_and_type_ref_index, CHECK);
613 // bootstrap specifier index must be checked later,
614 // when BootstrapMethods attr is available
615 break;
616 }
617 default: {
618 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
619 ShouldNotReachHere();
620 break;
621 }
622 } // switch(tag)
623 } // end of for
624
625 cp->allocate_resolved_klasses(_loader_data, num_klasses, CHECK);
626
627 if (!_need_verify) {
628 return;
629 }
630
631 // second verification pass - checks the strings are of the right format.
632 // but not yet to the other entries
633 for (index = 1; index < length; index++) {
634 const jbyte tag = cp->tag_at(index).value();
635 switch (tag) {
636 case JVM_CONSTANT_UnresolvedClass: {
637 const Symbol* const class_name = cp->klass_name_at(index);
638 // check the name
639 verify_legal_class_name(class_name, CHECK);
640 break;
641 }
642 case JVM_CONSTANT_NameAndType: {
643 if (_need_verify) {
644 const int sig_index = cp->signature_ref_index_at(index);
645 const int name_index = cp->name_ref_index_at(index);
646 const Symbol* const name = cp->symbol_at(name_index);
647 const Symbol* const sig = cp->symbol_at(sig_index);
648 guarantee_property(sig->utf8_length() != 0,
649 "Illegal zero length constant pool entry at %d in class %s",
650 sig_index, CHECK);
651 guarantee_property(name->utf8_length() != 0,
652 "Illegal zero length constant pool entry at %d in class %s",
653 name_index, CHECK);
654
655 if (Signature::is_method(sig)) {
656 // Format check method name and signature
657 verify_legal_method_name(name, CHECK);
658 verify_legal_method_signature(name, sig, CHECK);
659 } else {
660 // Format check field name and signature
661 verify_legal_field_name(name, CHECK);
662 verify_legal_field_signature(name, sig, CHECK);
663 }
664 }
665 break;
666 }
667 case JVM_CONSTANT_Dynamic: {
668 const int name_and_type_ref_index =
669 cp->name_and_type_ref_index_at(index);
670 // already verified to be utf8
671 const int name_ref_index =
672 cp->name_ref_index_at(name_and_type_ref_index);
673 // already verified to be utf8
674 const int signature_ref_index =
675 cp->signature_ref_index_at(name_and_type_ref_index);
676 const Symbol* const name = cp->symbol_at(name_ref_index);
677 const Symbol* const signature = cp->symbol_at(signature_ref_index);
678 if (_need_verify) {
679 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
680 // Need only to be sure signature is the right type.
681 if (Signature::is_method(signature)) {
682 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
683 }
684 }
685 break;
686 }
687 case JVM_CONSTANT_InvokeDynamic:
688 case JVM_CONSTANT_Fieldref:
689 case JVM_CONSTANT_Methodref:
690 case JVM_CONSTANT_InterfaceMethodref: {
691 const int name_and_type_ref_index =
692 cp->name_and_type_ref_index_at(index);
693 // already verified to be utf8
694 const int name_ref_index =
695 cp->name_ref_index_at(name_and_type_ref_index);
696 // already verified to be utf8
697 const int signature_ref_index =
698 cp->signature_ref_index_at(name_and_type_ref_index);
699 const Symbol* const name = cp->symbol_at(name_ref_index);
700 const Symbol* const signature = cp->symbol_at(signature_ref_index);
701 if (tag == JVM_CONSTANT_Fieldref) {
702 if (_need_verify) {
703 // Field name and signature are verified above, when iterating NameAndType_info.
704 // Need only to be sure signature is non-zero length and the right type.
705 if (Signature::is_method(signature)) {
706 throwIllegalSignature("Field", name, signature, CHECK);
707 }
708 }
709 } else {
710 if (_need_verify) {
711 // Method name and signature are individually verified above, when iterating
712 // NameAndType_info. Need to check here that signature is non-zero length and
713 // the right type.
714 if (!Signature::is_method(signature)) {
715 throwIllegalSignature("Method", name, signature, CHECK);
716 }
717 }
718 // If a class method name begins with '<', it must be "<init>" and have void signature,
719 // or if it is an inline type, <vnew> with return.
720 const unsigned int name_len = name->utf8_length();
721 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
722 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
723 if (name != vmSymbols::object_initializer_name() &&
724 name != vmSymbols::inline_factory_name()) {
725 classfile_parse_error(
726 "Bad method name at constant pool index %u in class file %s",
727 name_ref_index, THREAD);
728 return;
729 } else if (!Signature::is_void_method(signature)) {
730 // if return type is non-void then it must be an inline type
731 if (name == vmSymbols::object_initializer_name() ||
732 !EnableValhalla || !supports_inline_types() ||
733 !signature->ends_with(JVM_SIGNATURE_ENDCLASS)) {
734 throwIllegalSignature("Method", name, signature, CHECK);
735 }
736 }
737 }
738 }
739 break;
740 }
741 case JVM_CONSTANT_MethodHandle: {
742 const int ref_index = cp->method_handle_index_at(index);
743 const int ref_kind = cp->method_handle_ref_kind_at(index);
744 switch (ref_kind) {
745 case JVM_REF_invokeVirtual:
746 case JVM_REF_invokeStatic:
747 case JVM_REF_invokeSpecial:
748 case JVM_REF_newInvokeSpecial: {
749 const int name_and_type_ref_index =
750 cp->name_and_type_ref_index_at(ref_index);
751 const int name_ref_index =
752 cp->name_ref_index_at(name_and_type_ref_index);
753 const Symbol* const name = cp->symbol_at(name_ref_index);
754
755 if (EnableValhalla && supports_inline_types() && name == vmSymbols::inline_factory_name()) { // <vnew>
756 // <vnew> factory methods must be non-void return and invokeStatic.
757 const int signature_ref_index =
758 cp->signature_ref_index_at(name_and_type_ref_index);
759 const Symbol* const signature = cp->symbol_at(signature_ref_index);
760 if (signature->is_void_method_signature() || ref_kind != JVM_REF_invokeStatic) {
761 classfile_parse_error(
762 "Bad factory method name at constant pool index %u in class file %s",
763 name_ref_index, CHECK);
764 }
765 } else if (name != vmSymbols::object_initializer_name()) { // !<init>
766 if (ref_kind == JVM_REF_newInvokeSpecial) {
767 classfile_parse_error(
768 "Bad constructor name at constant pool index %u in class file %s",
769 name_ref_index, THREAD);
770 return;
771 }
772 } else { // <init>
773 // The allowed invocation mode of <init> depends on its signature.
774 // This test corresponds to verify_invoke_instructions in the verifier.
775 const int signature_ref_index =
776 cp->signature_ref_index_at(name_and_type_ref_index);
777 const Symbol* const signature = cp->symbol_at(signature_ref_index);
778 if (signature->is_void_method_signature()
779 && ref_kind == JVM_REF_newInvokeSpecial) {
780 // OK, could be a constructor call
781 } else {
782 classfile_parse_error(
783 "Bad method name at constant pool index %u in class file %s",
784 name_ref_index, THREAD);
785 return;
786 }
787 }
788 break;
789 }
790 // Other ref_kinds are already fully checked in previous pass.
791 } // switch(ref_kind)
792 break;
793 }
794 case JVM_CONSTANT_MethodType: {
795 const Symbol* const no_name = vmSymbols::type_name(); // place holder
796 const Symbol* const signature = cp->method_type_signature_at(index);
797 verify_legal_method_signature(no_name, signature, CHECK);
798 break;
799 }
800 case JVM_CONSTANT_Utf8: {
801 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
802 }
803 } // switch(tag)
804 } // end of for
805 }
806
807 class NameSigHash: public ResourceObj {
808 public:
809 const Symbol* _name; // name
810 const Symbol* _sig; // signature
811 NameSigHash* _next; // Next entry in hash table
812 };
813
814 static const int HASH_ROW_SIZE = 256;
815
816 static unsigned int hash(const Symbol* name, const Symbol* sig) {
817 unsigned int raw_hash = 0;
818 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
819 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
820
821 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
822 }
823
824
825 static void initialize_hashtable(NameSigHash** table) {
826 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
827 }
828 // Return false if the name/sig combination is found in table.
829 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
830 // The old format checker uses heap sort to find duplicates.
831 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
832 // of table since we don't expect Symbol*'s to move.
833 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
834 assert(name != NULL, "name in constant pool is NULL");
835
836 // First lookup for duplicates
837 int index = hash(name, sig);
838 NameSigHash* entry = table[index];
839 while (entry != NULL) {
840 if (entry->_name == name && entry->_sig == sig) {
841 return false;
842 }
843 entry = entry->_next;
844 }
845
846 // No duplicate is found, allocate a new entry and fill it.
847 entry = new NameSigHash();
848 entry->_name = name;
849 entry->_sig = sig;
850
851 // Insert into hash table
852 entry->_next = table[index];
853 table[index] = entry;
854
855 return true;
856 }
857
858 static void check_identity_and_value_modifiers(ClassFileParser* current, const InstanceKlass* super_type, TRAPS) {
859 assert(super_type != NULL,"Method doesn't support null super type");
860 if (super_type->carries_identity_modifier()) {
861 if (current->carries_value_modifier()) {
862 ResourceMark rm(THREAD);
863 Exceptions::fthrow(
864 THREAD_AND_LOCATION,
865 vmSymbols::java_lang_IncompatibleClassChangeError(),
866 "Value type %s has an identity type as supertype",
867 current->class_name()->as_klass_external_name());
868 return;
869 }
870 current->set_carries_identity_modifier();
871 }
872 if (super_type->carries_value_modifier()) {
873 if (current->carries_identity_modifier()) {
874 ResourceMark rm(THREAD);
875 Exceptions::fthrow(
876 THREAD_AND_LOCATION,
877 vmSymbols::java_lang_IncompatibleClassChangeError(),
878 "Identity type %s has a value type as supertype",
879 current->class_name()->as_klass_external_name());
880 return;
881 }
882 current->set_carries_value_modifier();
883 }
884 }
885
886 void ClassFileParser::parse_interfaces(const ClassFileStream* stream,
887 int itfs_len,
888 ConstantPool* cp,
889 bool* const has_nonstatic_concrete_methods,
890 // FIXME: lots of these functions
891 // declare their parameters as const,
892 // which adds only noise to the code.
893 // Remove the spurious const modifiers.
894 // Many are of the form "const int x"
895 // or "T* const x".
896 bool* const is_declared_atomic,
897 TRAPS) {
898 assert(stream != NULL, "invariant");
899 assert(cp != NULL, "invariant");
900 assert(has_nonstatic_concrete_methods != NULL, "invariant");
901
902 if (itfs_len == 0) {
903 _local_interfaces = Universe::the_empty_instance_klass_array();
904
905 } else {
906 assert(itfs_len > 0, "only called for len>0");
907 _local_interface_indexes = new GrowableArray<u2>(itfs_len, mtNone);
908 int index = 0;
909 for (index = 0; index < itfs_len; index++) {
910 const u2 interface_index = stream->get_u2(CHECK);
911 check_property(
912 valid_klass_reference_at(interface_index),
913 "Interface name has bad constant pool index %u in class file %s",
914 interface_index, CHECK);
915 _local_interface_indexes->at_put_grow(index, interface_index);
916 }
917
918 if (!_need_verify || itfs_len <= 1) {
919 return;
920 }
921
922 // Check if there's any duplicates in interfaces
923 ResourceMark rm(THREAD);
924 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
925 NameSigHash*,
926 HASH_ROW_SIZE);
927 initialize_hashtable(interface_names);
928 bool dup = false;
929 const Symbol* name = NULL;
930 {
931 debug_only(NoSafepointVerifier nsv;)
932 for (index = 0; index < itfs_len; index++) {
933 name = cp->klass_name_at(_local_interface_indexes->at(index));
934 // If no duplicates, add (name, NULL) in hashtable interface_names.
935 if (!put_after_lookup(name, NULL, interface_names)) {
936 dup = true;
937 break;
938 }
939 }
940 }
941 if (dup) {
942 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
943 name->as_C_string(), THREAD);
944 }
945 }
946 }
947
948 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
949 int constantvalue_index,
950 int signature_index,
951 TRAPS) const {
952 // Make sure the constant pool entry is of a type appropriate to this field
953 guarantee_property(
954 (constantvalue_index > 0 &&
955 constantvalue_index < cp->length()),
956 "Bad initial value index %u in ConstantValue attribute in class file %s",
957 constantvalue_index, CHECK);
958
959 const constantTag value_type = cp->tag_at(constantvalue_index);
960 switch(cp->basic_type_for_signature_at(signature_index)) {
961 case T_LONG: {
962 guarantee_property(value_type.is_long(),
963 "Inconsistent constant value type in class file %s",
964 CHECK);
965 break;
966 }
967 case T_FLOAT: {
968 guarantee_property(value_type.is_float(),
969 "Inconsistent constant value type in class file %s",
970 CHECK);
971 break;
972 }
973 case T_DOUBLE: {
974 guarantee_property(value_type.is_double(),
975 "Inconsistent constant value type in class file %s",
976 CHECK);
977 break;
978 }
979 case T_BYTE:
980 case T_CHAR:
981 case T_SHORT:
982 case T_BOOLEAN:
983 case T_INT: {
984 guarantee_property(value_type.is_int(),
985 "Inconsistent constant value type in class file %s",
986 CHECK);
987 break;
988 }
989 case T_OBJECT: {
990 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
991 && value_type.is_string()),
992 "Bad string initial value in class file %s",
993 CHECK);
994 break;
995 }
996 default: {
997 classfile_parse_error("Unable to set initial value %u in class file %s",
998 constantvalue_index,
999 THREAD);
1000 }
1001 }
1002 }
1003
1004 class AnnotationCollector : public ResourceObj{
1005 public:
1006 enum Location { _in_field, _in_method, _in_class };
1007 enum ID {
1008 _unknown = 0,
1009 _method_CallerSensitive,
1010 _method_ForceInline,
1011 _method_DontInline,
1012 _method_ChangesCurrentThread,
1013 _method_JvmtiMountTransition,
1014 _method_InjectedProfile,
1015 _method_LambdaForm_Compiled,
1016 _method_Hidden,
1017 _method_Scoped,
1018 _method_IntrinsicCandidate,
1019 _jdk_internal_vm_annotation_Contended,
1020 _field_Stable,
1021 _jdk_internal_vm_annotation_ReservedStackAccess,
1022 _jdk_internal_ValueBased,
1023 _annotation_LIMIT
1024 };
1025 const Location _location;
1026 int _annotations_present;
1027 u2 _contended_group;
1028
1029 AnnotationCollector(Location location)
1030 : _location(location), _annotations_present(0), _contended_group(0)
1031 {
1032 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1033 }
1034 // If this annotation name has an ID, report it (or _none).
1035 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
1036 // Set the annotation name:
1037 void set_annotation(ID id) {
1038 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1039 _annotations_present |= nth_bit((int)id);
1040 }
1041
1042 void remove_annotation(ID id) {
1043 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1044 _annotations_present &= ~nth_bit((int)id);
1045 }
1046
1047 // Report if the annotation is present.
1048 bool has_any_annotations() const { return _annotations_present != 0; }
1049 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1050
1051 void set_contended_group(u2 group) { _contended_group = group; }
1052 u2 contended_group() const { return _contended_group; }
1053
1054 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1055
1056 void set_stable(bool stable) { set_annotation(_field_Stable); }
1057 bool is_stable() const { return has_annotation(_field_Stable); }
1058 };
1059
1060 // This class also doubles as a holder for metadata cleanup.
1061 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1062 private:
1063 ClassLoaderData* _loader_data;
1064 AnnotationArray* _field_annotations;
1065 AnnotationArray* _field_type_annotations;
1066 public:
1067 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1068 AnnotationCollector(_in_field),
1069 _loader_data(loader_data),
1070 _field_annotations(NULL),
1071 _field_type_annotations(NULL) {}
1072 ~FieldAnnotationCollector();
1073 void apply_to(FieldInfo* f);
1074 AnnotationArray* field_annotations() { return _field_annotations; }
1075 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1076
1077 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1078 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1079 };
1080
1081 class MethodAnnotationCollector : public AnnotationCollector{
1082 public:
1083 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1084 void apply_to(const methodHandle& m);
1085 };
1086
1087 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1088 public:
1089 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1090 void apply_to(InstanceKlass* ik);
1091 };
1092
1093
1094 static int skip_annotation_value(const u1*, int, int); // fwd decl
1095
1096 // Safely increment index by val if does not pass limit
1097 #define SAFE_ADD(index, limit, val) \
1098 if (index >= limit - val) return limit; \
1099 index += val;
1100
1101 // Skip an annotation. Return >=limit if there is any problem.
1102 static int skip_annotation(const u1* buffer, int limit, int index) {
1103 assert(buffer != NULL, "invariant");
1104 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1105 // value := switch (tag:u1) { ... }
1106 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1107 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1108 while (--nmem >= 0 && index < limit) {
1109 SAFE_ADD(index, limit, 2); // skip member
1110 index = skip_annotation_value(buffer, limit, index);
1111 }
1112 return index;
1113 }
1114
1115 // Skip an annotation value. Return >=limit if there is any problem.
1116 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1117 assert(buffer != NULL, "invariant");
1118
1119 // value := switch (tag:u1) {
1120 // case B, C, I, S, Z, D, F, J, c: con:u2;
1121 // case e: e_class:u2 e_name:u2;
1122 // case s: s_con:u2;
1123 // case [: do(nval:u2) {value};
1124 // case @: annotation;
1125 // case s: s_con:u2;
1126 // }
1127 SAFE_ADD(index, limit, 1); // read tag
1128 const u1 tag = buffer[index - 1];
1129 switch (tag) {
1130 case 'B':
1131 case 'C':
1132 case 'I':
1133 case 'S':
1134 case 'Z':
1135 case 'D':
1136 case 'F':
1137 case 'J':
1138 case 'c':
1139 case 's':
1140 SAFE_ADD(index, limit, 2); // skip con or s_con
1141 break;
1142 case 'e':
1143 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1144 break;
1145 case '[':
1146 {
1147 SAFE_ADD(index, limit, 2); // read nval
1148 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1149 while (--nval >= 0 && index < limit) {
1150 index = skip_annotation_value(buffer, limit, index);
1151 }
1152 }
1153 break;
1154 case '@':
1155 index = skip_annotation(buffer, limit, index);
1156 break;
1157 default:
1158 return limit; // bad tag byte
1159 }
1160 return index;
1161 }
1162
1163 // Sift through annotations, looking for those significant to the VM:
1164 static void parse_annotations(const ConstantPool* const cp,
1165 const u1* buffer, int limit,
1166 AnnotationCollector* coll,
1167 ClassLoaderData* loader_data,
1168 const bool can_access_vm_annotations) {
1169
1170 assert(cp != NULL, "invariant");
1171 assert(buffer != NULL, "invariant");
1172 assert(coll != NULL, "invariant");
1173 assert(loader_data != NULL, "invariant");
1174
1175 // annotations := do(nann:u2) {annotation}
1176 int index = 2; // read nann
1177 if (index >= limit) return;
1178 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1179 enum { // initial annotation layout
1180 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1181 count_off = 2, // u2 such as 1 (one value)
1182 member_off = 4, // utf8 such as 'value'
1183 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1184 e_tag_val = 'e',
1185 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1186 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1187 e_size = 11, // end of 'e' annotation
1188 c_tag_val = 'c', // payload is type
1189 c_con_off = 7, // utf8 payload, such as 'I'
1190 c_size = 9, // end of 'c' annotation
1191 s_tag_val = 's', // payload is String
1192 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1193 s_size = 9,
1194 min_size = 6 // smallest possible size (zero members)
1195 };
1196 // Cannot add min_size to index in case of overflow MAX_INT
1197 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1198 int index0 = index;
1199 index = skip_annotation(buffer, limit, index);
1200 const u1* const abase = buffer + index0;
1201 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1202 const int count = Bytes::get_Java_u2((address)abase + count_off);
1203 const Symbol* const aname = check_symbol_at(cp, atype);
1204 if (aname == NULL) break; // invalid annotation name
1205 const Symbol* member = NULL;
1206 if (count >= 1) {
1207 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1208 member = check_symbol_at(cp, member_index);
1209 if (member == NULL) break; // invalid member name
1210 }
1211
1212 // Here is where parsing particular annotations will take place.
1213 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1214 if (AnnotationCollector::_unknown == id) continue;
1215 coll->set_annotation(id);
1216
1217 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1218 // @Contended can optionally specify the contention group.
1219 //
1220 // Contended group defines the equivalence class over the fields:
1221 // the fields within the same contended group are not treated distinct.
1222 // The only exception is default group, which does not incur the
1223 // equivalence. Naturally, contention group for classes is meaningless.
1224 //
1225 // While the contention group is specified as String, annotation
1226 // values are already interned, and we might as well use the constant
1227 // pool index as the group tag.
1228 //
1229 u2 group_index = 0; // default contended group
1230 if (count == 1
1231 && s_size == (index - index0) // match size
1232 && s_tag_val == *(abase + tag_off)
1233 && member == vmSymbols::value_name()) {
1234 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1235 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1236 group_index = 0; // default contended group
1237 }
1238 }
1239 coll->set_contended_group(group_index);
1240 }
1241 }
1242 }
1243
1244
1245 // Parse attributes for a field.
1246 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1247 u2 attributes_count,
1248 bool is_static, u2 signature_index,
1249 u2* const constantvalue_index_addr,
1250 bool* const is_synthetic_addr,
1251 u2* const generic_signature_index_addr,
1252 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1253 TRAPS) {
1254 assert(cfs != NULL, "invariant");
1255 assert(constantvalue_index_addr != NULL, "invariant");
1256 assert(is_synthetic_addr != NULL, "invariant");
1257 assert(generic_signature_index_addr != NULL, "invariant");
1258 assert(parsed_annotations != NULL, "invariant");
1259 assert(attributes_count > 0, "attributes_count should be greater than 0");
1260
1261 u2 constantvalue_index = 0;
1262 u2 generic_signature_index = 0;
1263 bool is_synthetic = false;
1264 const u1* runtime_visible_annotations = NULL;
1265 int runtime_visible_annotations_length = 0;
1266 const u1* runtime_invisible_annotations = NULL;
1267 int runtime_invisible_annotations_length = 0;
1268 const u1* runtime_visible_type_annotations = NULL;
1269 int runtime_visible_type_annotations_length = 0;
1270 const u1* runtime_invisible_type_annotations = NULL;
1271 int runtime_invisible_type_annotations_length = 0;
1272 bool runtime_invisible_annotations_exists = false;
1273 bool runtime_invisible_type_annotations_exists = false;
1274 const ConstantPool* const cp = _cp;
1275
1276 while (attributes_count--) {
1277 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1278 const u2 attribute_name_index = cfs->get_u2_fast();
1279 const u4 attribute_length = cfs->get_u4_fast();
1280 check_property(valid_symbol_at(attribute_name_index),
1281 "Invalid field attribute index %u in class file %s",
1282 attribute_name_index,
1283 CHECK);
1284
1285 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1286 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1287 // ignore if non-static
1288 if (constantvalue_index != 0) {
1289 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1290 return;
1291 }
1292 check_property(
1293 attribute_length == 2,
1294 "Invalid ConstantValue field attribute length %u in class file %s",
1295 attribute_length, CHECK);
1296
1297 constantvalue_index = cfs->get_u2(CHECK);
1298 if (_need_verify) {
1299 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1300 }
1301 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1302 if (attribute_length != 0) {
1303 classfile_parse_error(
1304 "Invalid Synthetic field attribute length %u in class file %s",
1305 attribute_length, THREAD);
1306 return;
1307 }
1308 is_synthetic = true;
1309 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1310 if (attribute_length != 0) {
1311 classfile_parse_error(
1312 "Invalid Deprecated field attribute length %u in class file %s",
1313 attribute_length, THREAD);
1314 return;
1315 }
1316 } else if (_major_version >= JAVA_1_5_VERSION) {
1317 if (attribute_name == vmSymbols::tag_signature()) {
1318 if (generic_signature_index != 0) {
1319 classfile_parse_error(
1320 "Multiple Signature attributes for field in class file %s", THREAD);
1321 return;
1322 }
1323 if (attribute_length != 2) {
1324 classfile_parse_error(
1325 "Wrong size %u for field's Signature attribute in class file %s",
1326 attribute_length, THREAD);
1327 return;
1328 }
1329 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1330 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1331 if (runtime_visible_annotations != NULL) {
1332 classfile_parse_error(
1333 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1334 return;
1335 }
1336 runtime_visible_annotations_length = attribute_length;
1337 runtime_visible_annotations = cfs->current();
1338 assert(runtime_visible_annotations != NULL, "null visible annotations");
1339 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1340 parse_annotations(cp,
1341 runtime_visible_annotations,
1342 runtime_visible_annotations_length,
1343 parsed_annotations,
1344 _loader_data,
1345 _can_access_vm_annotations);
1346 cfs->skip_u1_fast(runtime_visible_annotations_length);
1347 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1348 if (runtime_invisible_annotations_exists) {
1349 classfile_parse_error(
1350 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1351 return;
1352 }
1353 runtime_invisible_annotations_exists = true;
1354 if (PreserveAllAnnotations) {
1355 runtime_invisible_annotations_length = attribute_length;
1356 runtime_invisible_annotations = cfs->current();
1357 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1358 }
1359 cfs->skip_u1(attribute_length, CHECK);
1360 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1361 if (runtime_visible_type_annotations != NULL) {
1362 classfile_parse_error(
1363 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1364 return;
1365 }
1366 runtime_visible_type_annotations_length = attribute_length;
1367 runtime_visible_type_annotations = cfs->current();
1368 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1369 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1370 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1371 if (runtime_invisible_type_annotations_exists) {
1372 classfile_parse_error(
1373 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1374 return;
1375 } else {
1376 runtime_invisible_type_annotations_exists = true;
1377 }
1378 if (PreserveAllAnnotations) {
1379 runtime_invisible_type_annotations_length = attribute_length;
1380 runtime_invisible_type_annotations = cfs->current();
1381 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1382 }
1383 cfs->skip_u1(attribute_length, CHECK);
1384 } else {
1385 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1386 }
1387 } else {
1388 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1389 }
1390 }
1391
1392 *constantvalue_index_addr = constantvalue_index;
1393 *is_synthetic_addr = is_synthetic;
1394 *generic_signature_index_addr = generic_signature_index;
1395 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1396 runtime_visible_annotations_length,
1397 runtime_invisible_annotations,
1398 runtime_invisible_annotations_length,
1399 CHECK);
1400 parsed_annotations->set_field_annotations(a);
1401 a = assemble_annotations(runtime_visible_type_annotations,
1402 runtime_visible_type_annotations_length,
1403 runtime_invisible_type_annotations,
1404 runtime_invisible_type_annotations_length,
1405 CHECK);
1406 parsed_annotations->set_field_type_annotations(a);
1407 return;
1408 }
1409
1410
1411 // Field allocation types. Used for computing field offsets.
1412
1413 enum FieldAllocationType {
1414 STATIC_OOP, // Oops
1415 STATIC_BYTE, // Boolean, Byte, char
1416 STATIC_SHORT, // shorts
1417 STATIC_WORD, // ints
1418 STATIC_DOUBLE, // aligned long or double
1419 STATIC_INLINE, // inline type field
1420 NONSTATIC_OOP,
1421 NONSTATIC_BYTE,
1422 NONSTATIC_SHORT,
1423 NONSTATIC_WORD,
1424 NONSTATIC_DOUBLE,
1425 NONSTATIC_INLINE,
1426 MAX_FIELD_ALLOCATION_TYPE,
1427 BAD_ALLOCATION_TYPE = -1
1428 };
1429
1430 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1431 BAD_ALLOCATION_TYPE, // 0
1432 BAD_ALLOCATION_TYPE, // 1
1433 BAD_ALLOCATION_TYPE, // 2
1434 BAD_ALLOCATION_TYPE, // 3
1435 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1436 NONSTATIC_SHORT, // T_CHAR = 5,
1437 NONSTATIC_WORD, // T_FLOAT = 6,
1438 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1439 NONSTATIC_BYTE, // T_BYTE = 8,
1440 NONSTATIC_SHORT, // T_SHORT = 9,
1441 NONSTATIC_WORD, // T_INT = 10,
1442 NONSTATIC_DOUBLE, // T_LONG = 11,
1443 NONSTATIC_OOP, // T_OBJECT = 12,
1444 NONSTATIC_OOP, // T_ARRAY = 13,
1445 NONSTATIC_OOP, // T_PRIMITIVE_OBJECT = 14,
1446 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1447 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1448 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1449 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1450 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1451 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20,
1452 BAD_ALLOCATION_TYPE, // 0
1453 BAD_ALLOCATION_TYPE, // 1
1454 BAD_ALLOCATION_TYPE, // 2
1455 BAD_ALLOCATION_TYPE, // 3
1456 STATIC_BYTE , // T_BOOLEAN = 4,
1457 STATIC_SHORT, // T_CHAR = 5,
1458 STATIC_WORD, // T_FLOAT = 6,
1459 STATIC_DOUBLE, // T_DOUBLE = 7,
1460 STATIC_BYTE, // T_BYTE = 8,
1461 STATIC_SHORT, // T_SHORT = 9,
1462 STATIC_WORD, // T_INT = 10,
1463 STATIC_DOUBLE, // T_LONG = 11,
1464 STATIC_OOP, // T_OBJECT = 12,
1465 STATIC_OOP, // T_ARRAY = 13,
1466 STATIC_OOP, // T_PRIMITIVE_OBJECT = 14,
1467 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1468 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1469 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1470 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1471 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1472 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20
1473 };
1474
1475 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type, bool is_inline_type) {
1476 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1477 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1478 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1479 if (is_inline_type) {
1480 result = is_static ? STATIC_INLINE : NONSTATIC_INLINE;
1481 }
1482 return result;
1483 }
1484
1485 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1486 public:
1487 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1488
1489 FieldAllocationCount() {
1490 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1491 count[i] = 0;
1492 }
1493 }
1494
1495 void update(bool is_static, BasicType type, bool is_inline_type) {
1496 FieldAllocationType atype = basic_type_to_atype(is_static, type, is_inline_type);
1497 if (atype != BAD_ALLOCATION_TYPE) {
1498 // Make sure there is no overflow with injected fields.
1499 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1500 count[atype]++;
1501 }
1502 }
1503 };
1504
1505 // Side-effects: populates the _fields, _fields_annotations,
1506 // _fields_type_annotations fields
1507 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1508 AccessFlags class_access_flags,
1509 FieldAllocationCount* const fac,
1510 ConstantPool* cp,
1511 const int cp_size,
1512 u2* const java_fields_count_ptr,
1513 TRAPS) {
1514
1515 assert(cfs != NULL, "invariant");
1516 assert(fac != NULL, "invariant");
1517 assert(cp != NULL, "invariant");
1518 assert(java_fields_count_ptr != NULL, "invariant");
1519
1520 assert(NULL == _fields, "invariant");
1521 assert(NULL == _fields_annotations, "invariant");
1522 assert(NULL == _fields_type_annotations, "invariant");
1523
1524 bool is_inline_type = class_access_flags.is_value_class() && !class_access_flags.is_abstract();
1525 cfs->guarantee_more(2, CHECK); // length
1526 const u2 length = cfs->get_u2_fast();
1527 *java_fields_count_ptr = length;
1528
1529 int num_injected = 0;
1530 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1531 &num_injected);
1532
1533 // two more slots are required for inline classes:
1534 // one for the static field with a reference to the pre-allocated default value
1535 // one for the field the JVM injects when detecting an empty inline class
1536 const int total_fields = length + num_injected + (is_inline_type ? 2 : 0);
1537
1538 // The field array starts with tuples of shorts
1539 // [access, name index, sig index, initial value index, byte offset].
1540 // A generic signature slot only exists for field with generic
1541 // signature attribute. And the access flag is set with
1542 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1543 // signature slots are at the end of the field array and after all
1544 // other fields data.
1545 //
1546 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1547 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1548 // ...
1549 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1550 // [generic signature index]
1551 // [generic signature index]
1552 // ...
1553 //
1554 // Allocate a temporary resource array for field data. For each field,
1555 // a slot is reserved in the temporary array for the generic signature
1556 // index. After parsing all fields, the data are copied to a permanent
1557 // array and any unused slots will be discarded.
1558 ResourceMark rm(THREAD);
1559 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1560 u2,
1561 total_fields * (FieldInfo::field_slots + 1));
1562
1563 // The generic signature slots start after all other fields' data.
1564 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1565 int num_generic_signature = 0;
1566 int instance_fields_count = 0;
1567 for (int n = 0; n < length; n++) {
1568 // access_flags, name_index, descriptor_index, attributes_count
1569 cfs->guarantee_more(8, CHECK);
1570
1571 jint recognized_modifiers = JVM_RECOGNIZED_FIELD_MODIFIERS;
1572
1573 const jint flags = cfs->get_u2_fast() & recognized_modifiers;
1574 verify_legal_field_modifiers(flags, class_access_flags, CHECK);
1575 AccessFlags access_flags;
1576 access_flags.set_flags(flags);
1577
1578 const u2 name_index = cfs->get_u2_fast();
1579 check_property(valid_symbol_at(name_index),
1580 "Invalid constant pool index %u for field name in class file %s",
1581 name_index, CHECK);
1582 const Symbol* const name = cp->symbol_at(name_index);
1583 verify_legal_field_name(name, CHECK);
1584
1585 const u2 signature_index = cfs->get_u2_fast();
1586 check_property(valid_symbol_at(signature_index),
1587 "Invalid constant pool index %u for field signature in class file %s",
1588 signature_index, CHECK);
1589 const Symbol* const sig = cp->symbol_at(signature_index);
1590 verify_legal_field_signature(name, sig, CHECK);
1591 if (!access_flags.is_static()) instance_fields_count++;
1592
1593 u2 constantvalue_index = 0;
1594 bool is_synthetic = false;
1595 u2 generic_signature_index = 0;
1596 const bool is_static = access_flags.is_static();
1597 FieldAnnotationCollector parsed_annotations(_loader_data);
1598
1599 const u2 attributes_count = cfs->get_u2_fast();
1600 if (attributes_count > 0) {
1601 parse_field_attributes(cfs,
1602 attributes_count,
1603 is_static,
1604 signature_index,
1605 &constantvalue_index,
1606 &is_synthetic,
1607 &generic_signature_index,
1608 &parsed_annotations,
1609 CHECK);
1610
1611 if (parsed_annotations.field_annotations() != NULL) {
1612 if (_fields_annotations == NULL) {
1613 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1614 _loader_data, length, NULL,
1615 CHECK);
1616 }
1617 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1618 parsed_annotations.set_field_annotations(NULL);
1619 }
1620 if (parsed_annotations.field_type_annotations() != NULL) {
1621 if (_fields_type_annotations == NULL) {
1622 _fields_type_annotations =
1623 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1624 length,
1625 NULL,
1626 CHECK);
1627 }
1628 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1629 parsed_annotations.set_field_type_annotations(NULL);
1630 }
1631
1632 if (is_synthetic) {
1633 access_flags.set_is_synthetic();
1634 }
1635 if (generic_signature_index != 0) {
1636 access_flags.set_field_has_generic_signature();
1637 fa[generic_signature_slot] = generic_signature_index;
1638 generic_signature_slot ++;
1639 num_generic_signature ++;
1640 }
1641 }
1642
1643 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1644 field->initialize(access_flags.as_short(),
1645 name_index,
1646 signature_index,
1647 constantvalue_index);
1648 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1649
1650 // Update FieldAllocationCount for this kind of field
1651 fac->update(is_static, type, type == T_PRIMITIVE_OBJECT);
1652
1653 // After field is initialized with type, we can augment it with aux info
1654 if (parsed_annotations.has_any_annotations()) {
1655 parsed_annotations.apply_to(field);
1656 if (field->is_contended()) {
1657 _has_contended_fields = true;
1658 }
1659 }
1660 }
1661
1662 int index = length;
1663 if (num_injected != 0) {
1664 for (int n = 0; n < num_injected; n++) {
1665 // Check for duplicates
1666 if (injected[n].may_be_java) {
1667 const Symbol* const name = injected[n].name();
1668 const Symbol* const signature = injected[n].signature();
1669 bool duplicate = false;
1670 for (int i = 0; i < length; i++) {
1671 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1672 if (name == cp->symbol_at(f->name_index()) &&
1673 signature == cp->symbol_at(f->signature_index())) {
1674 // Symbol is desclared in Java so skip this one
1675 duplicate = true;
1676 break;
1677 }
1678 }
1679 if (duplicate) {
1680 // These will be removed from the field array at the end
1681 continue;
1682 }
1683 }
1684
1685 // Injected field
1686 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1687 field->initialize((u2)JVM_ACC_FIELD_INTERNAL,
1688 (u2)(injected[n].name_index),
1689 (u2)(injected[n].signature_index),
1690 0);
1691
1692 const BasicType type = Signature::basic_type(injected[n].signature());
1693
1694 // Update FieldAllocationCount for this kind of field
1695 fac->update(false, type, false);
1696 index++;
1697 }
1698 }
1699
1700 if (is_inline_type) {
1701 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1702 field->initialize(JVM_ACC_FIELD_INTERNAL | JVM_ACC_STATIC,
1703 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(default_value_name)),
1704 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(object_signature)),
1705 0);
1706 const BasicType type = Signature::basic_type(vmSymbols::object_signature());
1707 fac->update(true, type, false);
1708 index++;
1709 }
1710
1711 if (is_inline_type && instance_fields_count == 0) {
1712 _is_empty_inline_type = true;
1713 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1714 field->initialize(JVM_ACC_FIELD_INTERNAL,
1715 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(empty_marker_name)),
1716 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(byte_signature)),
1717 0);
1718 const BasicType type = Signature::basic_type(vmSymbols::byte_signature());
1719 fac->update(false, type, false);
1720 index++;
1721 }
1722
1723 if (instance_fields_count > 0) {
1724 _has_nonstatic_fields = true;
1725 }
1726
1727 assert(NULL == _fields, "invariant");
1728
1729 _fields =
1730 MetadataFactory::new_array<u2>(_loader_data,
1731 index * FieldInfo::field_slots + num_generic_signature,
1732 CHECK);
1733 // Sometimes injected fields already exist in the Java source so
1734 // the fields array could be too long. In that case the
1735 // fields array is trimmed. Also unused slots that were reserved
1736 // for generic signature indexes are discarded.
1737 {
1738 int i = 0;
1739 for (; i < index * FieldInfo::field_slots; i++) {
1740 _fields->at_put(i, fa[i]);
1741 }
1742 for (int j = total_fields * FieldInfo::field_slots;
1743 j < generic_signature_slot; j++) {
1744 _fields->at_put(i++, fa[j]);
1745 }
1746 assert(_fields->length() == i, "");
1747 }
1748
1749 if (_need_verify && length > 1) {
1750 // Check duplicated fields
1751 ResourceMark rm(THREAD);
1752 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1753 THREAD, NameSigHash*, HASH_ROW_SIZE);
1754 initialize_hashtable(names_and_sigs);
1755 bool dup = false;
1756 const Symbol* name = NULL;
1757 const Symbol* sig = NULL;
1758 {
1759 debug_only(NoSafepointVerifier nsv;)
1760 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1761 name = fs.name();
1762 sig = fs.signature();
1763 // If no duplicates, add name/signature in hashtable names_and_sigs.
1764 if (!put_after_lookup(name, sig, names_and_sigs)) {
1765 dup = true;
1766 break;
1767 }
1768 }
1769 }
1770 if (dup) {
1771 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1772 name->as_C_string(), sig->as_klass_external_name(), THREAD);
1773 }
1774 }
1775 }
1776
1777
1778 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1779 u4 code_length,
1780 u4 exception_table_length,
1781 TRAPS) {
1782 assert(cfs != NULL, "invariant");
1783
1784 const unsafe_u2* const exception_table_start = cfs->current();
1785 assert(exception_table_start != NULL, "null exception table");
1786
1787 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1788 // end_pc,
1789 // handler_pc,
1790 // catch_type_index
1791
1792 // Will check legal target after parsing code array in verifier.
1793 if (_need_verify) {
1794 for (unsigned int i = 0; i < exception_table_length; i++) {
1795 const u2 start_pc = cfs->get_u2_fast();
1796 const u2 end_pc = cfs->get_u2_fast();
1797 const u2 handler_pc = cfs->get_u2_fast();
1798 const u2 catch_type_index = cfs->get_u2_fast();
1799 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1800 "Illegal exception table range in class file %s",
1801 CHECK_NULL);
1802 guarantee_property(handler_pc < code_length,
1803 "Illegal exception table handler in class file %s",
1804 CHECK_NULL);
1805 if (catch_type_index != 0) {
1806 guarantee_property(valid_klass_reference_at(catch_type_index),
1807 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1808 }
1809 }
1810 } else {
1811 cfs->skip_u2_fast(exception_table_length * 4);
1812 }
1813 return exception_table_start;
1814 }
1815
1816 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1817 u4 code_length,
1818 CompressedLineNumberWriteStream**const write_stream,
1819 TRAPS) {
1820
1821 const ClassFileStream* const cfs = _stream;
1822 unsigned int num_entries = cfs->get_u2(CHECK);
1823
1824 // Each entry is a u2 start_pc, and a u2 line_number
1825 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1826
1827 // Verify line number attribute and table length
1828 check_property(
1829 code_attribute_length == sizeof(u2) + length_in_bytes,
1830 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1831
1832 cfs->guarantee_more(length_in_bytes, CHECK);
1833
1834 if ((*write_stream) == NULL) {
1835 if (length_in_bytes > fixed_buffer_size) {
1836 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1837 } else {
1838 (*write_stream) = new CompressedLineNumberWriteStream(
1839 _linenumbertable_buffer, fixed_buffer_size);
1840 }
1841 }
1842
1843 while (num_entries-- > 0) {
1844 const u2 bci = cfs->get_u2_fast(); // start_pc
1845 const u2 line = cfs->get_u2_fast(); // line_number
1846 guarantee_property(bci < code_length,
1847 "Invalid pc in LineNumberTable in class file %s", CHECK);
1848 (*write_stream)->write_pair(bci, line);
1849 }
1850 }
1851
1852
1853 class LVT_Hash : public AllStatic {
1854 public:
1855
1856 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1857 /*
1858 * 3-tuple start_bci/length/slot has to be unique key,
1859 * so the following comparison seems to be redundant:
1860 * && elem->name_cp_index == entry->_elem->name_cp_index
1861 */
1862 return (e0.start_bci == e1.start_bci &&
1863 e0.length == e1.length &&
1864 e0.name_cp_index == e1.name_cp_index &&
1865 e0.slot == e1.slot);
1866 }
1867
1868 static unsigned int hash(LocalVariableTableElement const& e0) {
1869 unsigned int raw_hash = e0.start_bci;
1870
1871 raw_hash = e0.length + raw_hash * 37;
1872 raw_hash = e0.name_cp_index + raw_hash * 37;
1873 raw_hash = e0.slot + raw_hash * 37;
1874
1875 return raw_hash;
1876 }
1877 };
1878
1879
1880 // Class file LocalVariableTable elements.
1881 class Classfile_LVT_Element {
1882 public:
1883 u2 start_bci;
1884 u2 length;
1885 u2 name_cp_index;
1886 u2 descriptor_cp_index;
1887 u2 slot;
1888 };
1889
1890 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1891 LocalVariableTableElement* const lvt) {
1892 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1893 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1894 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1895 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1896 lvt->signature_cp_index = 0;
1897 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1898 }
1899
1900 // Function is used to parse both attributes:
1901 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1902 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1903 u4 code_length,
1904 u2 max_locals,
1905 u4 code_attribute_length,
1906 u2* const localvariable_table_length,
1907 bool isLVTT,
1908 TRAPS) {
1909 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1910 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1911 const unsigned int size =
1912 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1913
1914 const ConstantPool* const cp = _cp;
1915
1916 // Verify local variable table attribute has right length
1917 if (_need_verify) {
1918 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1919 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1920 }
1921
1922 const unsafe_u2* const localvariable_table_start = cfs->current();
1923 assert(localvariable_table_start != NULL, "null local variable table");
1924 if (!_need_verify) {
1925 cfs->skip_u2_fast(size);
1926 } else {
1927 cfs->guarantee_more(size * 2, CHECK_NULL);
1928 for(int i = 0; i < (*localvariable_table_length); i++) {
1929 const u2 start_pc = cfs->get_u2_fast();
1930 const u2 length = cfs->get_u2_fast();
1931 const u2 name_index = cfs->get_u2_fast();
1932 const u2 descriptor_index = cfs->get_u2_fast();
1933 const u2 index = cfs->get_u2_fast();
1934 // Assign to a u4 to avoid overflow
1935 const u4 end_pc = (u4)start_pc + (u4)length;
1936
1937 if (start_pc >= code_length) {
1938 classfile_parse_error(
1939 "Invalid start_pc %u in %s in class file %s",
1940 start_pc, tbl_name, THREAD);
1941 return NULL;
1942 }
1943 if (end_pc > code_length) {
1944 classfile_parse_error(
1945 "Invalid length %u in %s in class file %s",
1946 length, tbl_name, THREAD);
1947 return NULL;
1948 }
1949 const int cp_size = cp->length();
1950 guarantee_property(valid_symbol_at(name_index),
1951 "Name index %u in %s has bad constant type in class file %s",
1952 name_index, tbl_name, CHECK_NULL);
1953 guarantee_property(valid_symbol_at(descriptor_index),
1954 "Signature index %u in %s has bad constant type in class file %s",
1955 descriptor_index, tbl_name, CHECK_NULL);
1956
1957 const Symbol* const name = cp->symbol_at(name_index);
1958 const Symbol* const sig = cp->symbol_at(descriptor_index);
1959 verify_legal_field_name(name, CHECK_NULL);
1960 u2 extra_slot = 0;
1961 if (!isLVTT) {
1962 verify_legal_field_signature(name, sig, CHECK_NULL);
1963
1964 // 4894874: check special cases for double and long local variables
1965 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1966 sig == vmSymbols::type_signature(T_LONG)) {
1967 extra_slot = 1;
1968 }
1969 }
1970 guarantee_property((index + extra_slot) < max_locals,
1971 "Invalid index %u in %s in class file %s",
1972 index, tbl_name, CHECK_NULL);
1973 }
1974 }
1975 return localvariable_table_start;
1976 }
1977
1978 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1979 u4 code_attribute_length,
1980 bool need_verify,
1981 TRAPS) {
1982 assert(cfs != NULL, "invariant");
1983
1984 if (0 == code_attribute_length) {
1985 return NULL;
1986 }
1987
1988 const u1* const stackmap_table_start = cfs->current();
1989 assert(stackmap_table_start != NULL, "null stackmap table");
1990
1991 // check code_attribute_length first
1992 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1993
1994 if (!need_verify && !DumpSharedSpaces) {
1995 return NULL;
1996 }
1997 return stackmap_table_start;
1998 }
1999
2000 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2001 u2* const checked_exceptions_length,
2002 u4 method_attribute_length,
2003 TRAPS) {
2004 assert(cfs != NULL, "invariant");
2005 assert(checked_exceptions_length != NULL, "invariant");
2006
2007 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2008 *checked_exceptions_length = cfs->get_u2_fast();
2009 const unsigned int size =
2010 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2011 const unsafe_u2* const checked_exceptions_start = cfs->current();
2012 assert(checked_exceptions_start != NULL, "null checked exceptions");
2013 if (!_need_verify) {
2014 cfs->skip_u2_fast(size);
2015 } else {
2016 // Verify each value in the checked exception table
2017 u2 checked_exception;
2018 const u2 len = *checked_exceptions_length;
2019 cfs->guarantee_more(2 * len, CHECK_NULL);
2020 for (int i = 0; i < len; i++) {
2021 checked_exception = cfs->get_u2_fast();
2022 check_property(
2023 valid_klass_reference_at(checked_exception),
2024 "Exception name has bad type at constant pool %u in class file %s",
2025 checked_exception, CHECK_NULL);
2026 }
2027 }
2028 // check exceptions attribute length
2029 if (_need_verify) {
2030 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2031 sizeof(u2) * size),
2032 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2033 }
2034 return checked_exceptions_start;
2035 }
2036
2037 void ClassFileParser::throwIllegalSignature(const char* type,
2038 const Symbol* name,
2039 const Symbol* sig,
2040 TRAPS) const {
2041 assert(name != NULL, "invariant");
2042 assert(sig != NULL, "invariant");
2043
2044 const char* class_note = "";
2045 if (is_inline_type() && name == vmSymbols::object_initializer_name()) {
2046 class_note = " (an inline class)";
2047 }
2048
2049 ResourceMark rm(THREAD);
2050 Exceptions::fthrow(THREAD_AND_LOCATION,
2051 vmSymbols::java_lang_ClassFormatError(),
2052 "%s \"%s\" in class %s%s has illegal signature \"%s\"", type,
2053 name->as_C_string(), _class_name->as_C_string(), class_note, sig->as_C_string());
2054 }
2055
2056 AnnotationCollector::ID
2057 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2058 const Symbol* name,
2059 const bool can_access_vm_annotations) {
2060 const vmSymbolID sid = vmSymbols::find_sid(name);
2061 // Privileged code can use all annotations. Other code silently drops some.
2062 const bool privileged = loader_data->is_boot_class_loader_data() ||
2063 loader_data->is_platform_class_loader_data() ||
2064 can_access_vm_annotations;
2065 switch (sid) {
2066 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2067 if (_location != _in_method) break; // only allow for methods
2068 if (!privileged) break; // only allow in privileged code
2069 return _method_CallerSensitive;
2070 }
2071 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2072 if (_location != _in_method) break; // only allow for methods
2073 if (!privileged) break; // only allow in privileged code
2074 return _method_ForceInline;
2075 }
2076 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2077 if (_location != _in_method) break; // only allow for methods
2078 if (!privileged) break; // only allow in privileged code
2079 return _method_DontInline;
2080 }
2081 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ChangesCurrentThread_signature): {
2082 if (_location != _in_method) break; // only allow for methods
2083 if (!privileged) break; // only allow in privileged code
2084 return _method_ChangesCurrentThread;
2085 }
2086 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_JvmtiMountTransition_signature): {
2087 if (_location != _in_method) break; // only allow for methods
2088 if (!privileged) break; // only allow in privileged code
2089 return _method_JvmtiMountTransition;
2090 }
2091 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2092 if (_location != _in_method) break; // only allow for methods
2093 if (!privileged) break; // only allow in privileged code
2094 return _method_InjectedProfile;
2095 }
2096 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2097 if (_location != _in_method) break; // only allow for methods
2098 if (!privileged) break; // only allow in privileged code
2099 return _method_LambdaForm_Compiled;
2100 }
2101 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2102 if (_location != _in_method) break; // only allow for methods
2103 if (!privileged) break; // only allow in privileged code
2104 return _method_Hidden;
2105 }
2106 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
2107 if (_location != _in_method) break; // only allow for methods
2108 if (!privileged) break; // only allow in privileged code
2109 return _method_Scoped;
2110 }
2111 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
2112 if (_location != _in_method) break; // only allow for methods
2113 if (!privileged) break; // only allow in privileged code
2114 return _method_IntrinsicCandidate;
2115 }
2116 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2117 if (_location != _in_field) break; // only allow for fields
2118 if (!privileged) break; // only allow in privileged code
2119 return _field_Stable;
2120 }
2121 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2122 if (_location != _in_field && _location != _in_class) {
2123 break; // only allow for fields and classes
2124 }
2125 if (!EnableContended || (RestrictContended && !privileged)) {
2126 break; // honor privileges
2127 }
2128 return _jdk_internal_vm_annotation_Contended;
2129 }
2130 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2131 if (_location != _in_method) break; // only allow for methods
2132 if (RestrictReservedStack && !privileged) break; // honor privileges
2133 return _jdk_internal_vm_annotation_ReservedStackAccess;
2134 }
2135 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
2136 if (_location != _in_class) break; // only allow for classes
2137 if (!privileged) break; // only allow in privileged code
2138 return _jdk_internal_ValueBased;
2139 }
2140 default: {
2141 break;
2142 }
2143 }
2144 return AnnotationCollector::_unknown;
2145 }
2146
2147 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2148 if (is_contended())
2149 f->set_contended_group(contended_group());
2150 if (is_stable())
2151 f->set_stable(true);
2152 }
2153
2154 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2155 // If there's an error deallocate metadata for field annotations
2156 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2157 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2158 }
2159
2160 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2161 if (has_annotation(_method_CallerSensitive))
2162 m->set_caller_sensitive(true);
2163 if (has_annotation(_method_ForceInline))
2164 m->set_force_inline(true);
2165 if (has_annotation(_method_DontInline))
2166 m->set_dont_inline(true);
2167 if (has_annotation(_method_ChangesCurrentThread))
2168 m->set_changes_current_thread(true);
2169 if (has_annotation(_method_JvmtiMountTransition))
2170 m->set_jvmti_mount_transition(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_value_class,
2357 bool is_abstract_class,
2358 const ConstantPool* cp,
2359 AccessFlags* const promoted_flags,
2360 TRAPS) {
2361 assert(cfs != NULL, "invariant");
2362 assert(cp != NULL, "invariant");
2363 assert(promoted_flags != NULL, "invariant");
2364
2365 ResourceMark rm(THREAD);
2366 // Parse fixed parts:
2367 // access_flags, name_index, descriptor_index, attributes_count
2368 cfs->guarantee_more(8, CHECK_NULL);
2369
2370 int flags = cfs->get_u2_fast();
2371 const u2 name_index = cfs->get_u2_fast();
2372 const int cp_size = cp->length();
2373 check_property(
2374 valid_symbol_at(name_index),
2375 "Illegal constant pool index %u for method name in class file %s",
2376 name_index, CHECK_NULL);
2377 const Symbol* const name = cp->symbol_at(name_index);
2378 verify_legal_method_name(name, CHECK_NULL);
2379
2380 const u2 signature_index = cfs->get_u2_fast();
2381 guarantee_property(
2382 valid_symbol_at(signature_index),
2383 "Illegal constant pool index %u for method signature in class file %s",
2384 signature_index, CHECK_NULL);
2385 const Symbol* const signature = cp->symbol_at(signature_index);
2386
2387 if (name == vmSymbols::class_initializer_name()) {
2388 // We ignore the other access flags for a valid class initializer.
2389 // (JVM Spec 2nd ed., chapter 4.6)
2390 if (_major_version < 51) { // backward compatibility
2391 flags = JVM_ACC_STATIC;
2392 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2393 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2394 } else {
2395 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2396 return NULL;
2397 }
2398 } else {
2399 verify_legal_method_modifiers(flags, access_flags() , name, CHECK_NULL);
2400 }
2401
2402 if (EnableValhalla && supports_inline_types() && name == vmSymbols::inline_factory_name()) {
2403 if (is_interface) {
2404 classfile_parse_error("Interface cannot have a method named <vnew>, class file %s", CHECK_NULL);
2405 } else if (!is_value_class) {
2406 classfile_parse_error("Identity class cannot have a method <vnew>, class file %s", CHECK_NULL);
2407 } else if (signature->is_void_method_signature()) {
2408 classfile_parse_error("Factory method <vnew> must have a non-void return type, class file %s", CHECK_NULL);
2409 } else { // also OK, a static factory, as long as the return value is good
2410 bool ok = false;
2411 SignatureStream ss((Symbol*) signature, true);
2412 while (!ss.at_return_type()) ss.next();
2413 if (ss.is_reference()) {
2414 Symbol* ret = ss.as_symbol();
2415 const Symbol* required = class_name();
2416 if (is_hidden()) {
2417 // The original class name for hidden classes changed.
2418 /// So using the original name in the return type is no longer valid.
2419 required = vmSymbols::java_lang_Object();
2420 }
2421 ok = (ret == required);
2422 }
2423 if (!ok) {
2424 throwIllegalSignature("Method", name, signature, CHECK_0);
2425 }
2426 // factory method, with a non-void return. No other
2427 // definition of <vnew> is possible.
2428 //
2429 // The verifier (in verify_invoke_instructions) will inspect the
2430 // signature of any attempt to invoke <vnew>, and ensure that it
2431 // returns non-void.
2432 }
2433 }
2434
2435 if (name == vmSymbols::object_initializer_name()) {
2436 if (is_interface) {
2437 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2438 } else if ((!is_value_class || is_abstract_class) && signature->is_void_method_signature()) {
2439 // OK, a constructor
2440 } else {
2441 // not OK, so throw the same error as in verify_legal_method_signature.
2442 throwIllegalSignature("Method", name, signature, CHECK_0);
2443 }
2444 // A declared <init> method must always be a non-static
2445 // object constructor, with a void return.
2446 //
2447 // The verifier (in verify_invoke_instructions) will inspect the
2448 // signature of any attempt to invoke <init>, and ensure that it
2449 // returns void.
2450 }
2451
2452 if (EnableValhalla) {
2453 if (((flags & JVM_ACC_SYNCHRONIZED) == JVM_ACC_SYNCHRONIZED)
2454 && ((flags & JVM_ACC_STATIC) == 0 )
2455 && !carries_identity_modifier()) {
2456 classfile_parse_error("Invalid synchronized method in non-identity class %s", THREAD);
2457 return NULL;
2458 }
2459 }
2460
2461 int args_size = -1; // only used when _need_verify is true
2462 if (_need_verify) {
2463 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2464 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2465 verify_legal_method_signature(name, signature, CHECK_NULL);
2466 if (args_size > MAX_ARGS_SIZE) {
2467 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2468 return NULL;
2469 }
2470 }
2471
2472 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2473
2474 // Default values for code and exceptions attribute elements
2475 u2 max_stack = 0;
2476 u2 max_locals = 0;
2477 u4 code_length = 0;
2478 const u1* code_start = 0;
2479 u2 exception_table_length = 0;
2480 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2481 Array<int>* exception_handlers = Universe::the_empty_int_array();
2482 u2 checked_exceptions_length = 0;
2483 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2484 CompressedLineNumberWriteStream* linenumber_table = NULL;
2485 int linenumber_table_length = 0;
2486 int total_lvt_length = 0;
2487 u2 lvt_cnt = 0;
2488 u2 lvtt_cnt = 0;
2489 bool lvt_allocated = false;
2490 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2491 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2492 u2* localvariable_table_length = NULL;
2493 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2494 u2* localvariable_type_table_length = NULL;
2495 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2496 int method_parameters_length = -1;
2497 const u1* method_parameters_data = NULL;
2498 bool method_parameters_seen = false;
2499 bool parsed_code_attribute = false;
2500 bool parsed_checked_exceptions_attribute = false;
2501 bool parsed_stackmap_attribute = false;
2502 // stackmap attribute - JDK1.5
2503 const u1* stackmap_data = NULL;
2504 int stackmap_data_length = 0;
2505 u2 generic_signature_index = 0;
2506 MethodAnnotationCollector parsed_annotations;
2507 const u1* runtime_visible_annotations = NULL;
2508 int runtime_visible_annotations_length = 0;
2509 const u1* runtime_invisible_annotations = NULL;
2510 int runtime_invisible_annotations_length = 0;
2511 const u1* runtime_visible_parameter_annotations = NULL;
2512 int runtime_visible_parameter_annotations_length = 0;
2513 const u1* runtime_invisible_parameter_annotations = NULL;
2514 int runtime_invisible_parameter_annotations_length = 0;
2515 const u1* runtime_visible_type_annotations = NULL;
2516 int runtime_visible_type_annotations_length = 0;
2517 const u1* runtime_invisible_type_annotations = NULL;
2518 int runtime_invisible_type_annotations_length = 0;
2519 bool runtime_invisible_annotations_exists = false;
2520 bool runtime_invisible_type_annotations_exists = false;
2521 bool runtime_invisible_parameter_annotations_exists = false;
2522 const u1* annotation_default = NULL;
2523 int annotation_default_length = 0;
2524
2525 // Parse code and exceptions attribute
2526 u2 method_attributes_count = cfs->get_u2_fast();
2527 while (method_attributes_count--) {
2528 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2529 const u2 method_attribute_name_index = cfs->get_u2_fast();
2530 const u4 method_attribute_length = cfs->get_u4_fast();
2531 check_property(
2532 valid_symbol_at(method_attribute_name_index),
2533 "Invalid method attribute name index %u in class file %s",
2534 method_attribute_name_index, CHECK_NULL);
2535
2536 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2537 if (method_attribute_name == vmSymbols::tag_code()) {
2538 // Parse Code attribute
2539 if (_need_verify) {
2540 guarantee_property(
2541 !access_flags.is_native() && !access_flags.is_abstract(),
2542 "Code attribute in native or abstract methods in class file %s",
2543 CHECK_NULL);
2544 }
2545 if (parsed_code_attribute) {
2546 classfile_parse_error("Multiple Code attributes in class file %s",
2547 THREAD);
2548 return NULL;
2549 }
2550 parsed_code_attribute = true;
2551
2552 // Stack size, locals size, and code size
2553 cfs->guarantee_more(8, CHECK_NULL);
2554 max_stack = cfs->get_u2_fast();
2555 max_locals = cfs->get_u2_fast();
2556 code_length = cfs->get_u4_fast();
2557 if (_need_verify) {
2558 guarantee_property(args_size <= max_locals,
2559 "Arguments can't fit into locals in class file %s",
2560 CHECK_NULL);
2561 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2562 "Invalid method Code length %u in class file %s",
2563 code_length, CHECK_NULL);
2564 }
2565 // Code pointer
2566 code_start = cfs->current();
2567 assert(code_start != NULL, "null code start");
2568 cfs->guarantee_more(code_length, CHECK_NULL);
2569 cfs->skip_u1_fast(code_length);
2570
2571 // Exception handler table
2572 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2573 exception_table_length = cfs->get_u2_fast();
2574 if (exception_table_length > 0) {
2575 exception_table_start = parse_exception_table(cfs,
2576 code_length,
2577 exception_table_length,
2578 CHECK_NULL);
2579 }
2580
2581 // Parse additional attributes in code attribute
2582 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2583 u2 code_attributes_count = cfs->get_u2_fast();
2584
2585 unsigned int calculated_attribute_length = 0;
2586
2587 calculated_attribute_length =
2588 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2589 calculated_attribute_length +=
2590 code_length +
2591 sizeof(exception_table_length) +
2592 sizeof(code_attributes_count) +
2593 exception_table_length *
2594 ( sizeof(u2) + // start_pc
2595 sizeof(u2) + // end_pc
2596 sizeof(u2) + // handler_pc
2597 sizeof(u2) ); // catch_type_index
2598
2599 while (code_attributes_count--) {
2600 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2601 const u2 code_attribute_name_index = cfs->get_u2_fast();
2602 const u4 code_attribute_length = cfs->get_u4_fast();
2603 calculated_attribute_length += code_attribute_length +
2604 sizeof(code_attribute_name_index) +
2605 sizeof(code_attribute_length);
2606 check_property(valid_symbol_at(code_attribute_name_index),
2607 "Invalid code attribute name index %u in class file %s",
2608 code_attribute_name_index,
2609 CHECK_NULL);
2610 if (LoadLineNumberTables &&
2611 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2612 // Parse and compress line number table
2613 parse_linenumber_table(code_attribute_length,
2614 code_length,
2615 &linenumber_table,
2616 CHECK_NULL);
2617
2618 } else if (LoadLocalVariableTables &&
2619 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2620 // Parse local variable table
2621 if (!lvt_allocated) {
2622 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2623 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2624 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2625 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2626 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2627 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2628 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2629 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2630 lvt_allocated = true;
2631 }
2632 if (lvt_cnt == max_lvt_cnt) {
2633 max_lvt_cnt <<= 1;
2634 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2635 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2636 }
2637 localvariable_table_start[lvt_cnt] =
2638 parse_localvariable_table(cfs,
2639 code_length,
2640 max_locals,
2641 code_attribute_length,
2642 &localvariable_table_length[lvt_cnt],
2643 false, // is not LVTT
2644 CHECK_NULL);
2645 total_lvt_length += localvariable_table_length[lvt_cnt];
2646 lvt_cnt++;
2647 } else if (LoadLocalVariableTypeTables &&
2648 _major_version >= JAVA_1_5_VERSION &&
2649 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2650 if (!lvt_allocated) {
2651 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2652 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2653 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2654 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2655 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2656 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2657 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2658 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2659 lvt_allocated = true;
2660 }
2661 // Parse local variable type table
2662 if (lvtt_cnt == max_lvtt_cnt) {
2663 max_lvtt_cnt <<= 1;
2664 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2665 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2666 }
2667 localvariable_type_table_start[lvtt_cnt] =
2668 parse_localvariable_table(cfs,
2669 code_length,
2670 max_locals,
2671 code_attribute_length,
2672 &localvariable_type_table_length[lvtt_cnt],
2673 true, // is LVTT
2674 CHECK_NULL);
2675 lvtt_cnt++;
2676 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2677 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2678 // Stack map is only needed by the new verifier in JDK1.5.
2679 if (parsed_stackmap_attribute) {
2680 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2681 return NULL;
2682 }
2683 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2684 stackmap_data_length = code_attribute_length;
2685 parsed_stackmap_attribute = true;
2686 } else {
2687 // Skip unknown attributes
2688 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2689 }
2690 }
2691 // check method attribute length
2692 if (_need_verify) {
2693 guarantee_property(method_attribute_length == calculated_attribute_length,
2694 "Code segment has wrong length in class file %s",
2695 CHECK_NULL);
2696 }
2697 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2698 // Parse Exceptions attribute
2699 if (parsed_checked_exceptions_attribute) {
2700 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2701 THREAD);
2702 return NULL;
2703 }
2704 parsed_checked_exceptions_attribute = true;
2705 checked_exceptions_start =
2706 parse_checked_exceptions(cfs,
2707 &checked_exceptions_length,
2708 method_attribute_length,
2709 CHECK_NULL);
2710 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2711 // reject multiple method parameters
2712 if (method_parameters_seen) {
2713 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2714 THREAD);
2715 return NULL;
2716 }
2717 method_parameters_seen = true;
2718 method_parameters_length = cfs->get_u1_fast();
2719 const u2 real_length = (method_parameters_length * 4u) + 1u;
2720 if (method_attribute_length != real_length) {
2721 classfile_parse_error(
2722 "Invalid MethodParameters method attribute length %u in class file",
2723 method_attribute_length, THREAD);
2724 return NULL;
2725 }
2726 method_parameters_data = cfs->current();
2727 cfs->skip_u2_fast(method_parameters_length);
2728 cfs->skip_u2_fast(method_parameters_length);
2729 // ignore this attribute if it cannot be reflected
2730 if (!vmClasses::Parameter_klass_loaded())
2731 method_parameters_length = -1;
2732 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2733 if (method_attribute_length != 0) {
2734 classfile_parse_error(
2735 "Invalid Synthetic method attribute length %u in class file %s",
2736 method_attribute_length, THREAD);
2737 return NULL;
2738 }
2739 // Should we check that there hasn't already been a synthetic attribute?
2740 access_flags.set_is_synthetic();
2741 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2742 if (method_attribute_length != 0) {
2743 classfile_parse_error(
2744 "Invalid Deprecated method attribute length %u in class file %s",
2745 method_attribute_length, THREAD);
2746 return NULL;
2747 }
2748 } else if (_major_version >= JAVA_1_5_VERSION) {
2749 if (method_attribute_name == vmSymbols::tag_signature()) {
2750 if (generic_signature_index != 0) {
2751 classfile_parse_error(
2752 "Multiple Signature attributes for method in class file %s",
2753 THREAD);
2754 return NULL;
2755 }
2756 if (method_attribute_length != 2) {
2757 classfile_parse_error(
2758 "Invalid Signature attribute length %u in class file %s",
2759 method_attribute_length, THREAD);
2760 return NULL;
2761 }
2762 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2763 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2764 if (runtime_visible_annotations != NULL) {
2765 classfile_parse_error(
2766 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2767 THREAD);
2768 return NULL;
2769 }
2770 runtime_visible_annotations_length = method_attribute_length;
2771 runtime_visible_annotations = cfs->current();
2772 assert(runtime_visible_annotations != NULL, "null visible annotations");
2773 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2774 parse_annotations(cp,
2775 runtime_visible_annotations,
2776 runtime_visible_annotations_length,
2777 &parsed_annotations,
2778 _loader_data,
2779 _can_access_vm_annotations);
2780 cfs->skip_u1_fast(runtime_visible_annotations_length);
2781 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2782 if (runtime_invisible_annotations_exists) {
2783 classfile_parse_error(
2784 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2785 THREAD);
2786 return NULL;
2787 }
2788 runtime_invisible_annotations_exists = true;
2789 if (PreserveAllAnnotations) {
2790 runtime_invisible_annotations_length = method_attribute_length;
2791 runtime_invisible_annotations = cfs->current();
2792 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2793 }
2794 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2795 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2796 if (runtime_visible_parameter_annotations != NULL) {
2797 classfile_parse_error(
2798 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2799 THREAD);
2800 return NULL;
2801 }
2802 runtime_visible_parameter_annotations_length = method_attribute_length;
2803 runtime_visible_parameter_annotations = cfs->current();
2804 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2805 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2806 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2807 if (runtime_invisible_parameter_annotations_exists) {
2808 classfile_parse_error(
2809 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2810 THREAD);
2811 return NULL;
2812 }
2813 runtime_invisible_parameter_annotations_exists = true;
2814 if (PreserveAllAnnotations) {
2815 runtime_invisible_parameter_annotations_length = method_attribute_length;
2816 runtime_invisible_parameter_annotations = cfs->current();
2817 assert(runtime_invisible_parameter_annotations != NULL,
2818 "null invisible parameter annotations");
2819 }
2820 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2821 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2822 if (annotation_default != NULL) {
2823 classfile_parse_error(
2824 "Multiple AnnotationDefault attributes for method in class file %s",
2825 THREAD);
2826 return NULL;
2827 }
2828 annotation_default_length = method_attribute_length;
2829 annotation_default = cfs->current();
2830 assert(annotation_default != NULL, "null annotation default");
2831 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2832 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2833 if (runtime_visible_type_annotations != NULL) {
2834 classfile_parse_error(
2835 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2836 THREAD);
2837 return NULL;
2838 }
2839 runtime_visible_type_annotations_length = method_attribute_length;
2840 runtime_visible_type_annotations = cfs->current();
2841 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2842 // No need for the VM to parse Type annotations
2843 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2844 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2845 if (runtime_invisible_type_annotations_exists) {
2846 classfile_parse_error(
2847 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2848 THREAD);
2849 return NULL;
2850 } else {
2851 runtime_invisible_type_annotations_exists = true;
2852 }
2853 if (PreserveAllAnnotations) {
2854 runtime_invisible_type_annotations_length = method_attribute_length;
2855 runtime_invisible_type_annotations = cfs->current();
2856 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2857 }
2858 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2859 } else {
2860 // Skip unknown attributes
2861 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2862 }
2863 } else {
2864 // Skip unknown attributes
2865 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2866 }
2867 }
2868
2869 if (linenumber_table != NULL) {
2870 linenumber_table->write_terminator();
2871 linenumber_table_length = linenumber_table->position();
2872 }
2873
2874 // Make sure there's at least one Code attribute in non-native/non-abstract method
2875 if (_need_verify) {
2876 guarantee_property(access_flags.is_native() ||
2877 access_flags.is_abstract() ||
2878 parsed_code_attribute,
2879 "Absent Code attribute in method that is not native or abstract in class file %s",
2880 CHECK_NULL);
2881 }
2882
2883 // All sizing information for a Method* is finally available, now create it
2884 InlineTableSizes sizes(
2885 total_lvt_length,
2886 linenumber_table_length,
2887 exception_table_length,
2888 checked_exceptions_length,
2889 method_parameters_length,
2890 generic_signature_index,
2891 runtime_visible_annotations_length +
2892 runtime_invisible_annotations_length,
2893 runtime_visible_parameter_annotations_length +
2894 runtime_invisible_parameter_annotations_length,
2895 runtime_visible_type_annotations_length +
2896 runtime_invisible_type_annotations_length,
2897 annotation_default_length,
2898 0);
2899
2900 Method* const m = Method::allocate(_loader_data,
2901 code_length,
2902 access_flags,
2903 &sizes,
2904 ConstMethod::NORMAL,
2905 _cp->symbol_at(name_index),
2906 CHECK_NULL);
2907
2908 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2909
2910 // Fill in information from fixed part (access_flags already set)
2911 m->set_constants(_cp);
2912 m->set_name_index(name_index);
2913 m->set_signature_index(signature_index);
2914 m->compute_from_signature(cp->symbol_at(signature_index));
2915 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2916
2917 // Fill in code attribute information
2918 m->set_max_stack(max_stack);
2919 m->set_max_locals(max_locals);
2920 if (stackmap_data != NULL) {
2921 m->constMethod()->copy_stackmap_data(_loader_data,
2922 (u1*)stackmap_data,
2923 stackmap_data_length,
2924 CHECK_NULL);
2925 }
2926
2927 // Copy byte codes
2928 m->set_code((u1*)code_start);
2929
2930 // Copy line number table
2931 if (linenumber_table != NULL) {
2932 memcpy(m->compressed_linenumber_table(),
2933 linenumber_table->buffer(),
2934 linenumber_table_length);
2935 }
2936
2937 // Copy exception table
2938 if (exception_table_length > 0) {
2939 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2940 m->exception_table_start(),
2941 exception_table_length * sizeof(ExceptionTableElement),
2942 sizeof(u2));
2943 }
2944
2945 // Copy method parameters
2946 if (method_parameters_length > 0) {
2947 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2948 for (int i = 0; i < method_parameters_length; i++) {
2949 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2950 method_parameters_data += 2;
2951 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2952 method_parameters_data += 2;
2953 }
2954 }
2955
2956 // Copy checked exceptions
2957 if (checked_exceptions_length > 0) {
2958 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2959 m->checked_exceptions_start(),
2960 checked_exceptions_length * sizeof(CheckedExceptionElement),
2961 sizeof(u2));
2962 }
2963
2964 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2965 if (total_lvt_length > 0) {
2966 promoted_flags->set_has_localvariable_table();
2967 copy_localvariable_table(m->constMethod(),
2968 lvt_cnt,
2969 localvariable_table_length,
2970 localvariable_table_start,
2971 lvtt_cnt,
2972 localvariable_type_table_length,
2973 localvariable_type_table_start,
2974 CHECK_NULL);
2975 }
2976
2977 if (parsed_annotations.has_any_annotations())
2978 parsed_annotations.apply_to(methodHandle(THREAD, m));
2979
2980 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2981 m->set_hidden(true);
2982 }
2983
2984 // Copy annotations
2985 copy_method_annotations(m->constMethod(),
2986 runtime_visible_annotations,
2987 runtime_visible_annotations_length,
2988 runtime_invisible_annotations,
2989 runtime_invisible_annotations_length,
2990 runtime_visible_parameter_annotations,
2991 runtime_visible_parameter_annotations_length,
2992 runtime_invisible_parameter_annotations,
2993 runtime_invisible_parameter_annotations_length,
2994 runtime_visible_type_annotations,
2995 runtime_visible_type_annotations_length,
2996 runtime_invisible_type_annotations,
2997 runtime_invisible_type_annotations_length,
2998 annotation_default,
2999 annotation_default_length,
3000 CHECK_NULL);
3001
3002 if (InstanceKlass::is_finalization_enabled() &&
3003 name == vmSymbols::finalize_method_name() &&
3004 signature == vmSymbols::void_method_signature()) {
3005 if (m->is_empty_method()) {
3006 _has_empty_finalizer = true;
3007 } else {
3008 _has_finalizer = true;
3009 }
3010 }
3011 if (name == vmSymbols::object_initializer_name() &&
3012 signature == vmSymbols::void_method_signature() &&
3013 m->is_vanilla_constructor()) {
3014 _has_vanilla_constructor = true;
3015 }
3016
3017 NOT_PRODUCT(m->verify());
3018 return m;
3019 }
3020
3021
3022 // The promoted_flags parameter is used to pass relevant access_flags
3023 // from the methods back up to the containing klass. These flag values
3024 // are added to klass's access_flags.
3025 // Side-effects: populates the _methods field in the parser
3026 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
3027 bool is_interface,
3028 bool is_value_class,
3029 bool is_abstract_type,
3030 AccessFlags* promoted_flags,
3031 bool* has_final_method,
3032 bool* declares_nonstatic_concrete_methods,
3033 TRAPS) {
3034 assert(cfs != NULL, "invariant");
3035 assert(promoted_flags != NULL, "invariant");
3036 assert(has_final_method != NULL, "invariant");
3037 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
3038
3039 assert(NULL == _methods, "invariant");
3040
3041 cfs->guarantee_more(2, CHECK); // length
3042 const u2 length = cfs->get_u2_fast();
3043 if (length == 0) {
3044 _methods = Universe::the_empty_method_array();
3045 } else {
3046 _methods = MetadataFactory::new_array<Method*>(_loader_data,
3047 length,
3048 NULL,
3049 CHECK);
3050
3051 for (int index = 0; index < length; index++) {
3052 Method* method = parse_method(cfs,
3053 is_interface,
3054 is_value_class,
3055 is_abstract_type,
3056 _cp,
3057 promoted_flags,
3058 CHECK);
3059
3060 if (method->is_final()) {
3061 *has_final_method = true;
3062 }
3063 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3064 // used for interface initialization, and default method inheritance analysis
3065 if (is_interface && !(*declares_nonstatic_concrete_methods)
3066 && !method->is_abstract() && !method->is_static()) {
3067 *declares_nonstatic_concrete_methods = true;
3068 }
3069 _methods->at_put(index, method);
3070 }
3071
3072 if (_need_verify && length > 1) {
3073 // Check duplicated methods
3074 ResourceMark rm(THREAD);
3075 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3076 THREAD, NameSigHash*, HASH_ROW_SIZE);
3077 initialize_hashtable(names_and_sigs);
3078 bool dup = false;
3079 const Symbol* name = NULL;
3080 const Symbol* sig = NULL;
3081 {
3082 debug_only(NoSafepointVerifier nsv;)
3083 for (int i = 0; i < length; i++) {
3084 const Method* const m = _methods->at(i);
3085 name = m->name();
3086 sig = m->signature();
3087 // If no duplicates, add name/signature in hashtable names_and_sigs.
3088 if (!put_after_lookup(name, sig, names_and_sigs)) {
3089 dup = true;
3090 break;
3091 }
3092 }
3093 }
3094 if (dup) {
3095 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3096 name->as_C_string(), sig->as_klass_external_name(), THREAD);
3097 }
3098 }
3099 }
3100 }
3101
3102 static const intArray* sort_methods(Array<Method*>* methods) {
3103 const int length = methods->length();
3104 // If JVMTI original method ordering or sharing is enabled we have to
3105 // remember the original class file ordering.
3106 // We temporarily use the vtable_index field in the Method* to store the
3107 // class file index, so we can read in after calling qsort.
3108 // Put the method ordering in the shared archive.
3109 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3110 for (int index = 0; index < length; index++) {
3111 Method* const m = methods->at(index);
3112 assert(!m->valid_vtable_index(), "vtable index should not be set");
3113 m->set_vtable_index(index);
3114 }
3115 }
3116 // Sort method array by ascending method name (for faster lookups & vtable construction)
3117 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3118 Method::sort_methods(methods);
3119
3120 intArray* method_ordering = NULL;
3121 // If JVMTI original method ordering or sharing is enabled construct int
3122 // array remembering the original ordering
3123 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3124 method_ordering = new intArray(length, length, -1);
3125 for (int index = 0; index < length; index++) {
3126 Method* const m = methods->at(index);
3127 const int old_index = m->vtable_index();
3128 assert(old_index >= 0 && old_index < length, "invalid method index");
3129 method_ordering->at_put(index, old_index);
3130 m->set_vtable_index(Method::invalid_vtable_index);
3131 }
3132 }
3133 return method_ordering;
3134 }
3135
3136 // Parse generic_signature attribute for methods and fields
3137 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3138 TRAPS) {
3139 assert(cfs != NULL, "invariant");
3140
3141 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3142 const u2 generic_signature_index = cfs->get_u2_fast();
3143 check_property(
3144 valid_symbol_at(generic_signature_index),
3145 "Invalid Signature attribute at constant pool index %u in class file %s",
3146 generic_signature_index, CHECK_0);
3147 return generic_signature_index;
3148 }
3149
3150 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3151 TRAPS) {
3152
3153 assert(cfs != NULL, "invariant");
3154
3155 cfs->guarantee_more(2, CHECK); // sourcefile_index
3156 const u2 sourcefile_index = cfs->get_u2_fast();
3157 check_property(
3158 valid_symbol_at(sourcefile_index),
3159 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3160 sourcefile_index, CHECK);
3161 set_class_sourcefile_index(sourcefile_index);
3162 }
3163
3164 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3165 int length,
3166 TRAPS) {
3167 assert(cfs != NULL, "invariant");
3168
3169 const u1* const sde_buffer = cfs->current();
3170 assert(sde_buffer != NULL, "null sde buffer");
3171
3172 // Don't bother storing it if there is no way to retrieve it
3173 if (JvmtiExport::can_get_source_debug_extension()) {
3174 assert((length+1) > length, "Overflow checking");
3175 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3176 for (int i = 0; i < length; i++) {
3177 sde[i] = sde_buffer[i];
3178 }
3179 sde[length] = '\0';
3180 set_class_sde_buffer((const char*)sde, length);
3181 }
3182 // Got utf8 string, set stream position forward
3183 cfs->skip_u1(length, CHECK);
3184 }
3185
3186
3187 // Inner classes can be static, private or protected (classic VM does this)
3188 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3189 JVM_ACC_PRIVATE | \
3190 JVM_ACC_PROTECTED | \
3191 JVM_ACC_STATIC \
3192 )
3193
3194 // Find index of the InnerClasses entry for the specified inner_class_info_index.
3195 // Return -1 if none is found.
3196 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3197 Symbol* cp_klass_name = cp->klass_name_at(inner);
3198 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3199 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3200 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
3201 return idx;
3202 }
3203 }
3204 return -1;
3205 }
3206
3207 // Return the outer_class_info_index for the InnerClasses entry containing the
3208 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
3209 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3210 if (inner == 0) return -1;
3211 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
3212 if (idx == -1) return -1;
3213 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3214 return result;
3215 }
3216
3217 // Return true if circularity is found, false if no circularity is found.
3218 // Use Floyd's cycle finding algorithm.
3219 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
3220 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3221 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3222
3223 while (fast != -1 && fast != 0) {
3224 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
3225 return true; // found a circularity
3226 }
3227 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3228 if (fast == -1) return false;
3229 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3230 if (fast == -1) return false;
3231 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
3232 assert(slow != -1, "sanity check");
3233 }
3234 return false;
3235 }
3236
3237 // Loop through each InnerClasses entry checking for circularities and duplications
3238 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
3239 // return true if a circularity or entries with duplicate inner_class_info_indexes
3240 // are found.
3241 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
3242 // Loop through each InnerClasses entry.
3243 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3244 // Return true if there are circular entries.
3245 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
3246 return true;
3247 }
3248 // Check if there are duplicate entries or entries with the same inner_class_info_index.
3249 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
3250 y += InstanceKlass::inner_class_next_offset) {
3251
3252 // 4347400: make sure there's no duplicate entry in the classes array
3253 if (_major_version >= JAVA_1_5_VERSION) {
3254 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
3255 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
3256 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
3257 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
3258 "Duplicate entry in InnerClasses attribute in class file %s",
3259 CHECK_(true));
3260 }
3261 // Return true if there are two entries with the same inner_class_info_index.
3262 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
3263 return true;
3264 }
3265 }
3266 }
3267 return false;
3268 }
3269
3270 // Return number of classes in the inner classes attribute table
3271 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3272 const ConstantPool* cp,
3273 const u1* const inner_classes_attribute_start,
3274 bool parsed_enclosingmethod_attribute,
3275 u2 enclosing_method_class_index,
3276 u2 enclosing_method_method_index,
3277 TRAPS) {
3278 const u1* const current_mark = cfs->current();
3279 u2 length = 0;
3280 if (inner_classes_attribute_start != NULL) {
3281 cfs->set_current(inner_classes_attribute_start);
3282 cfs->guarantee_more(2, CHECK_0); // length
3283 length = cfs->get_u2_fast();
3284 }
3285
3286 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3287 // method data:
3288 // [inner_class_info_index,
3289 // outer_class_info_index,
3290 // inner_name_index,
3291 // inner_class_access_flags,
3292 // ...
3293 // enclosing_method_class_index,
3294 // enclosing_method_method_index]
3295 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3296 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3297 _inner_classes = inner_classes;
3298
3299 int index = 0;
3300 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3301 for (int n = 0; n < length; n++) {
3302 // Inner class index
3303 const u2 inner_class_info_index = cfs->get_u2_fast();
3304 check_property(
3305 valid_klass_reference_at(inner_class_info_index),
3306 "inner_class_info_index %u has bad constant type in class file %s",
3307 inner_class_info_index, CHECK_0);
3308 // Outer class index
3309 const u2 outer_class_info_index = cfs->get_u2_fast();
3310 check_property(
3311 outer_class_info_index == 0 ||
3312 valid_klass_reference_at(outer_class_info_index),
3313 "outer_class_info_index %u has bad constant type in class file %s",
3314 outer_class_info_index, CHECK_0);
3315
3316 if (outer_class_info_index != 0) {
3317 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
3318 char* bytes = (char*)outer_class_name->bytes();
3319 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
3320 "Outer class is an array class in class file %s", CHECK_0);
3321 }
3322 // Inner class name
3323 const u2 inner_name_index = cfs->get_u2_fast();
3324 check_property(
3325 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3326 "inner_name_index %u has bad constant type in class file %s",
3327 inner_name_index, CHECK_0);
3328 if (_need_verify) {
3329 guarantee_property(inner_class_info_index != outer_class_info_index,
3330 "Class is both outer and inner class in class file %s", CHECK_0);
3331 }
3332
3333 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3334 // JVM_ACC_MODULE is defined in JDK-9 and later.
3335 if (_major_version >= JAVA_9_VERSION) {
3336 recognized_modifiers |= JVM_ACC_MODULE;
3337 }
3338 if (supports_inline_types()) {
3339 recognized_modifiers |= JVM_ACC_PRIMITIVE | JVM_ACC_VALUE | JVM_ACC_IDENTITY;
3340 }
3341
3342 // Access flags
3343 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3344
3345 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3346 // Set abstract bit for old class files for backward compatibility
3347 flags |= JVM_ACC_ABSTRACT;
3348 }
3349
3350 if (EnableValhalla) {
3351 if (!supports_inline_types()) {
3352 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
3353 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
3354 if (!is_module && !is_interface) {
3355 flags |= JVM_ACC_IDENTITY;
3356 }
3357 }
3358 }
3359
3360 const char* name = inner_name_index == 0 ? "unnamed" : cp->symbol_at(inner_name_index)->as_utf8();
3361 verify_legal_class_modifiers(flags, name, false, CHECK_0);
3362 AccessFlags inner_access_flags(flags);
3363
3364 inner_classes->at_put(index++, inner_class_info_index);
3365 inner_classes->at_put(index++, outer_class_info_index);
3366 inner_classes->at_put(index++, inner_name_index);
3367 inner_classes->at_put(index++, inner_access_flags.as_short());
3368 }
3369
3370 // Check for circular and duplicate entries.
3371 bool has_circularity = false;
3372 if (_need_verify) {
3373 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3374 if (has_circularity) {
3375 // If circularity check failed then ignore InnerClasses attribute.
3376 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3377 index = 0;
3378 if (parsed_enclosingmethod_attribute) {
3379 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3380 _inner_classes = inner_classes;
3381 } else {
3382 _inner_classes = Universe::the_empty_short_array();
3383 }
3384 }
3385 }
3386 // Set EnclosingMethod class and method indexes.
3387 if (parsed_enclosingmethod_attribute) {
3388 inner_classes->at_put(index++, enclosing_method_class_index);
3389 inner_classes->at_put(index++, enclosing_method_method_index);
3390 }
3391 assert(index == size || has_circularity, "wrong size");
3392
3393 // Restore buffer's current position.
3394 cfs->set_current(current_mark);
3395
3396 return length;
3397 }
3398
3399 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3400 const u1* const nest_members_attribute_start,
3401 TRAPS) {
3402 const u1* const current_mark = cfs->current();
3403 u2 length = 0;
3404 if (nest_members_attribute_start != NULL) {
3405 cfs->set_current(nest_members_attribute_start);
3406 cfs->guarantee_more(2, CHECK_0); // length
3407 length = cfs->get_u2_fast();
3408 }
3409 const int size = length;
3410 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3411 _nest_members = nest_members;
3412
3413 int index = 0;
3414 cfs->guarantee_more(2 * length, CHECK_0);
3415 for (int n = 0; n < length; n++) {
3416 const u2 class_info_index = cfs->get_u2_fast();
3417 check_property(
3418 valid_klass_reference_at(class_info_index),
3419 "Nest member class_info_index %u has bad constant type in class file %s",
3420 class_info_index, CHECK_0);
3421 nest_members->at_put(index++, class_info_index);
3422 }
3423 assert(index == size, "wrong size");
3424
3425 // Restore buffer's current position.
3426 cfs->set_current(current_mark);
3427
3428 return length;
3429 }
3430
3431 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3432 const u1* const permitted_subclasses_attribute_start,
3433 TRAPS) {
3434 const u1* const current_mark = cfs->current();
3435 u2 length = 0;
3436 if (permitted_subclasses_attribute_start != NULL) {
3437 cfs->set_current(permitted_subclasses_attribute_start);
3438 cfs->guarantee_more(2, CHECK_0); // length
3439 length = cfs->get_u2_fast();
3440 }
3441 const int size = length;
3442 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3443 _permitted_subclasses = permitted_subclasses;
3444
3445 if (length > 0) {
3446 int index = 0;
3447 cfs->guarantee_more(2 * length, CHECK_0);
3448 for (int n = 0; n < length; n++) {
3449 const u2 class_info_index = cfs->get_u2_fast();
3450 check_property(
3451 valid_klass_reference_at(class_info_index),
3452 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3453 class_info_index, CHECK_0);
3454 permitted_subclasses->at_put(index++, class_info_index);
3455 }
3456 assert(index == size, "wrong size");
3457 }
3458
3459 // Restore buffer's current position.
3460 cfs->set_current(current_mark);
3461
3462 return length;
3463 }
3464
3465 u2 ClassFileParser::parse_classfile_preload_attribute(const ClassFileStream* const cfs,
3466 const u1* const preload_attribute_start,
3467 TRAPS) {
3468 const u1* const current_mark = cfs->current();
3469 u2 length = 0;
3470 if (preload_attribute_start != NULL) {
3471 cfs->set_current(preload_attribute_start);
3472 cfs->guarantee_more(2, CHECK_0); // length
3473 length = cfs->get_u2_fast();
3474 }
3475 const int size = length;
3476 Array<u2>* const preload_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3477 _preload_classes = preload_classes;
3478 if (length > 0) {
3479 int index = 0;
3480 cfs->guarantee_more(2 * length, CHECK_0);
3481 for (int n = 0; n < length; n++) {
3482 const u2 class_info_index = cfs->get_u2_fast();
3483 check_property(
3484 valid_klass_reference_at(class_info_index),
3485 "Preload class_info_index %u has bad constant type in class file %s",
3486 class_info_index, CHECK_0);
3487 preload_classes->at_put(index++, class_info_index);
3488 }
3489 assert(index == size, "wrong size");
3490 }
3491
3492 // Restore buffer's current position.
3493 cfs->set_current(current_mark);
3494
3495 return length;
3496 }
3497
3498 // Record {
3499 // u2 attribute_name_index;
3500 // u4 attribute_length;
3501 // u2 components_count;
3502 // component_info components[components_count];
3503 // }
3504 // component_info {
3505 // u2 name_index;
3506 // u2 descriptor_index
3507 // u2 attributes_count;
3508 // attribute_info_attributes[attributes_count];
3509 // }
3510 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3511 const ConstantPool* cp,
3512 const u1* const record_attribute_start,
3513 TRAPS) {
3514 const u1* const current_mark = cfs->current();
3515 int components_count = 0;
3516 unsigned int calculate_attr_size = 0;
3517 if (record_attribute_start != NULL) {
3518 cfs->set_current(record_attribute_start);
3519 cfs->guarantee_more(2, CHECK_0); // num of components
3520 components_count = (int)cfs->get_u2_fast();
3521 calculate_attr_size = 2;
3522 }
3523
3524 Array<RecordComponent*>* const record_components =
3525 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, NULL, CHECK_0);
3526 _record_components = record_components;
3527
3528 for (int x = 0; x < components_count; x++) {
3529 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3530
3531 const u2 name_index = cfs->get_u2_fast();
3532 check_property(valid_symbol_at(name_index),
3533 "Invalid constant pool index %u for name in Record attribute in class file %s",
3534 name_index, CHECK_0);
3535 const Symbol* const name = cp->symbol_at(name_index);
3536 verify_legal_field_name(name, CHECK_0);
3537
3538 const u2 descriptor_index = cfs->get_u2_fast();
3539 check_property(valid_symbol_at(descriptor_index),
3540 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3541 descriptor_index, CHECK_0);
3542 const Symbol* const descr = cp->symbol_at(descriptor_index);
3543 verify_legal_field_signature(name, descr, CHECK_0);
3544
3545 const u2 attributes_count = cfs->get_u2_fast();
3546 calculate_attr_size += 6;
3547 u2 generic_sig_index = 0;
3548 const u1* runtime_visible_annotations = NULL;
3549 int runtime_visible_annotations_length = 0;
3550 const u1* runtime_invisible_annotations = NULL;
3551 int runtime_invisible_annotations_length = 0;
3552 bool runtime_invisible_annotations_exists = false;
3553 const u1* runtime_visible_type_annotations = NULL;
3554 int runtime_visible_type_annotations_length = 0;
3555 const u1* runtime_invisible_type_annotations = NULL;
3556 int runtime_invisible_type_annotations_length = 0;
3557 bool runtime_invisible_type_annotations_exists = false;
3558
3559 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3560 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3561 for (int y = 0; y < attributes_count; y++) {
3562 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3563 const u2 attribute_name_index = cfs->get_u2_fast();
3564 const u4 attribute_length = cfs->get_u4_fast();
3565 calculate_attr_size += 6;
3566 check_property(
3567 valid_symbol_at(attribute_name_index),
3568 "Invalid Record attribute name index %u in class file %s",
3569 attribute_name_index, CHECK_0);
3570
3571 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3572 if (attribute_name == vmSymbols::tag_signature()) {
3573 if (generic_sig_index != 0) {
3574 classfile_parse_error(
3575 "Multiple Signature attributes for Record component in class file %s",
3576 THREAD);
3577 return 0;
3578 }
3579 if (attribute_length != 2) {
3580 classfile_parse_error(
3581 "Invalid Signature attribute length %u in Record component in class file %s",
3582 attribute_length, THREAD);
3583 return 0;
3584 }
3585 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3586
3587 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3588 if (runtime_visible_annotations != NULL) {
3589 classfile_parse_error(
3590 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3591 return 0;
3592 }
3593 runtime_visible_annotations_length = attribute_length;
3594 runtime_visible_annotations = cfs->current();
3595
3596 assert(runtime_visible_annotations != NULL, "null record component visible annotation");
3597 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3598 cfs->skip_u1_fast(runtime_visible_annotations_length);
3599
3600 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3601 if (runtime_invisible_annotations_exists) {
3602 classfile_parse_error(
3603 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3604 return 0;
3605 }
3606 runtime_invisible_annotations_exists = true;
3607 if (PreserveAllAnnotations) {
3608 runtime_invisible_annotations_length = attribute_length;
3609 runtime_invisible_annotations = cfs->current();
3610 assert(runtime_invisible_annotations != NULL, "null record component invisible annotation");
3611 }
3612 cfs->skip_u1(attribute_length, CHECK_0);
3613
3614 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3615 if (runtime_visible_type_annotations != NULL) {
3616 classfile_parse_error(
3617 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3618 return 0;
3619 }
3620 runtime_visible_type_annotations_length = attribute_length;
3621 runtime_visible_type_annotations = cfs->current();
3622
3623 assert(runtime_visible_type_annotations != NULL, "null record component visible type annotation");
3624 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3625 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3626
3627 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3628 if (runtime_invisible_type_annotations_exists) {
3629 classfile_parse_error(
3630 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3631 return 0;
3632 }
3633 runtime_invisible_type_annotations_exists = true;
3634 if (PreserveAllAnnotations) {
3635 runtime_invisible_type_annotations_length = attribute_length;
3636 runtime_invisible_type_annotations = cfs->current();
3637 assert(runtime_invisible_type_annotations != NULL, "null record component invisible type annotation");
3638 }
3639 cfs->skip_u1(attribute_length, CHECK_0);
3640
3641 } else {
3642 // Skip unknown attributes
3643 cfs->skip_u1(attribute_length, CHECK_0);
3644 }
3645 calculate_attr_size += attribute_length;
3646 } // End of attributes For loop
3647
3648 AnnotationArray* annotations = assemble_annotations(runtime_visible_annotations,
3649 runtime_visible_annotations_length,
3650 runtime_invisible_annotations,
3651 runtime_invisible_annotations_length,
3652 CHECK_0);
3653 AnnotationArray* type_annotations = assemble_annotations(runtime_visible_type_annotations,
3654 runtime_visible_type_annotations_length,
3655 runtime_invisible_type_annotations,
3656 runtime_invisible_type_annotations_length,
3657 CHECK_0);
3658
3659 RecordComponent* record_component =
3660 RecordComponent::allocate(_loader_data, name_index, descriptor_index,
3661 attributes_count, generic_sig_index,
3662 annotations, type_annotations, CHECK_0);
3663 record_components->at_put(x, record_component);
3664 } // End of component processing loop
3665
3666 // Restore buffer's current position.
3667 cfs->set_current(current_mark);
3668 return calculate_attr_size;
3669 }
3670
3671 void ClassFileParser::parse_classfile_synthetic_attribute() {
3672 set_class_synthetic_flag(true);
3673 }
3674
3675 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3676 assert(cfs != NULL, "invariant");
3677
3678 const u2 signature_index = cfs->get_u2(CHECK);
3679 check_property(
3680 valid_symbol_at(signature_index),
3681 "Invalid constant pool index %u in Signature attribute in class file %s",
3682 signature_index, CHECK);
3683 set_class_generic_signature_index(signature_index);
3684 }
3685
3686 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3687 ConstantPool* cp,
3688 u4 attribute_byte_length,
3689 TRAPS) {
3690 assert(cfs != NULL, "invariant");
3691 assert(cp != NULL, "invariant");
3692
3693 const u1* const current_start = cfs->current();
3694
3695 guarantee_property(attribute_byte_length >= sizeof(u2),
3696 "Invalid BootstrapMethods attribute length %u in class file %s",
3697 attribute_byte_length,
3698 CHECK);
3699
3700 cfs->guarantee_more(attribute_byte_length, CHECK);
3701
3702 const int attribute_array_length = cfs->get_u2_fast();
3703
3704 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3705 "Short length on BootstrapMethods in class file %s",
3706 CHECK);
3707
3708
3709 // The attribute contains a counted array of counted tuples of shorts,
3710 // represending bootstrap specifiers:
3711 // length*{bootstrap_method_index, argument_count*{argument_index}}
3712 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3713 // operand_count = number of shorts in attr, except for leading length
3714
3715 // The attribute is copied into a short[] array.
3716 // The array begins with a series of short[2] pairs, one for each tuple.
3717 const int index_size = (attribute_array_length * 2);
3718
3719 Array<u2>* const operands =
3720 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3721
3722 // Eagerly assign operands so they will be deallocated with the constant
3723 // pool if there is an error.
3724 cp->set_operands(operands);
3725
3726 int operand_fill_index = index_size;
3727 const int cp_size = cp->length();
3728
3729 for (int n = 0; n < attribute_array_length; n++) {
3730 // Store a 32-bit offset into the header of the operand array.
3731 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3732
3733 // Read a bootstrap specifier.
3734 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3735 const u2 bootstrap_method_index = cfs->get_u2_fast();
3736 const u2 argument_count = cfs->get_u2_fast();
3737 check_property(
3738 valid_cp_range(bootstrap_method_index, cp_size) &&
3739 cp->tag_at(bootstrap_method_index).is_method_handle(),
3740 "bootstrap_method_index %u has bad constant type in class file %s",
3741 bootstrap_method_index,
3742 CHECK);
3743
3744 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3745 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3746 CHECK);
3747
3748 operands->at_put(operand_fill_index++, bootstrap_method_index);
3749 operands->at_put(operand_fill_index++, argument_count);
3750
3751 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3752 for (int j = 0; j < argument_count; j++) {
3753 const u2 argument_index = cfs->get_u2_fast();
3754 check_property(
3755 valid_cp_range(argument_index, cp_size) &&
3756 cp->tag_at(argument_index).is_loadable_constant(),
3757 "argument_index %u has bad constant type in class file %s",
3758 argument_index,
3759 CHECK);
3760 operands->at_put(operand_fill_index++, argument_index);
3761 }
3762 }
3763 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3764 "Bad length on BootstrapMethods in class file %s",
3765 CHECK);
3766 }
3767
3768 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3769 ConstantPool* cp,
3770 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3771 TRAPS) {
3772 assert(cfs != NULL, "invariant");
3773 assert(cp != NULL, "invariant");
3774 assert(parsed_annotations != NULL, "invariant");
3775
3776 // Set inner classes attribute to default sentinel
3777 _inner_classes = Universe::the_empty_short_array();
3778 // Set nest members attribute to default sentinel
3779 _nest_members = Universe::the_empty_short_array();
3780 // Set _permitted_subclasses attribute to default sentinel
3781 _permitted_subclasses = Universe::the_empty_short_array();
3782 // Set _preload_classes attribute to default sentinel
3783 _preload_classes = Universe::the_empty_short_array();
3784 cfs->guarantee_more(2, CHECK); // attributes_count
3785 u2 attributes_count = cfs->get_u2_fast();
3786 bool parsed_sourcefile_attribute = false;
3787 bool parsed_innerclasses_attribute = false;
3788 bool parsed_nest_members_attribute = false;
3789 bool parsed_permitted_subclasses_attribute = false;
3790 bool parsed_preload_attribute = false;
3791 bool parsed_nest_host_attribute = false;
3792 bool parsed_record_attribute = false;
3793 bool parsed_enclosingmethod_attribute = false;
3794 bool parsed_bootstrap_methods_attribute = false;
3795 const u1* runtime_visible_annotations = NULL;
3796 int runtime_visible_annotations_length = 0;
3797 const u1* runtime_invisible_annotations = NULL;
3798 int runtime_invisible_annotations_length = 0;
3799 const u1* runtime_visible_type_annotations = NULL;
3800 int runtime_visible_type_annotations_length = 0;
3801 const u1* runtime_invisible_type_annotations = NULL;
3802 int runtime_invisible_type_annotations_length = 0;
3803 bool runtime_invisible_type_annotations_exists = false;
3804 bool runtime_invisible_annotations_exists = false;
3805 bool parsed_source_debug_ext_annotations_exist = false;
3806 const u1* inner_classes_attribute_start = NULL;
3807 u4 inner_classes_attribute_length = 0;
3808 u2 enclosing_method_class_index = 0;
3809 u2 enclosing_method_method_index = 0;
3810 const u1* nest_members_attribute_start = NULL;
3811 u4 nest_members_attribute_length = 0;
3812 const u1* record_attribute_start = NULL;
3813 u4 record_attribute_length = 0;
3814 const u1* permitted_subclasses_attribute_start = NULL;
3815 u4 permitted_subclasses_attribute_length = 0;
3816 const u1* preload_attribute_start = NULL;
3817 u4 preload_attribute_length = 0;
3818
3819 // Iterate over attributes
3820 while (attributes_count--) {
3821 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3822 const u2 attribute_name_index = cfs->get_u2_fast();
3823 const u4 attribute_length = cfs->get_u4_fast();
3824 check_property(
3825 valid_symbol_at(attribute_name_index),
3826 "Attribute name has bad constant pool index %u in class file %s",
3827 attribute_name_index, CHECK);
3828 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3829 if (tag == vmSymbols::tag_source_file()) {
3830 // Check for SourceFile tag
3831 if (_need_verify) {
3832 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3833 }
3834 if (parsed_sourcefile_attribute) {
3835 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3836 return;
3837 } else {
3838 parsed_sourcefile_attribute = true;
3839 }
3840 parse_classfile_sourcefile_attribute(cfs, CHECK);
3841 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3842 // Check for SourceDebugExtension tag
3843 if (parsed_source_debug_ext_annotations_exist) {
3844 classfile_parse_error(
3845 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3846 return;
3847 }
3848 parsed_source_debug_ext_annotations_exist = true;
3849 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3850 } else if (tag == vmSymbols::tag_inner_classes()) {
3851 // Check for InnerClasses tag
3852 if (parsed_innerclasses_attribute) {
3853 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3854 return;
3855 } else {
3856 parsed_innerclasses_attribute = true;
3857 }
3858 inner_classes_attribute_start = cfs->current();
3859 inner_classes_attribute_length = attribute_length;
3860 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3861 } else if (tag == vmSymbols::tag_synthetic()) {
3862 // Check for Synthetic tag
3863 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3864 if (attribute_length != 0) {
3865 classfile_parse_error(
3866 "Invalid Synthetic classfile attribute length %u in class file %s",
3867 attribute_length, THREAD);
3868 return;
3869 }
3870 parse_classfile_synthetic_attribute();
3871 } else if (tag == vmSymbols::tag_deprecated()) {
3872 // Check for Deprecated tag - 4276120
3873 if (attribute_length != 0) {
3874 classfile_parse_error(
3875 "Invalid Deprecated classfile attribute length %u in class file %s",
3876 attribute_length, THREAD);
3877 return;
3878 }
3879 } else if (_major_version >= JAVA_1_5_VERSION) {
3880 if (tag == vmSymbols::tag_signature()) {
3881 if (_generic_signature_index != 0) {
3882 classfile_parse_error(
3883 "Multiple Signature attributes in class file %s", THREAD);
3884 return;
3885 }
3886 if (attribute_length != 2) {
3887 classfile_parse_error(
3888 "Wrong Signature attribute length %u in class file %s",
3889 attribute_length, THREAD);
3890 return;
3891 }
3892 parse_classfile_signature_attribute(cfs, CHECK);
3893 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3894 if (runtime_visible_annotations != NULL) {
3895 classfile_parse_error(
3896 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3897 return;
3898 }
3899 runtime_visible_annotations_length = attribute_length;
3900 runtime_visible_annotations = cfs->current();
3901 assert(runtime_visible_annotations != NULL, "null visible annotations");
3902 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3903 parse_annotations(cp,
3904 runtime_visible_annotations,
3905 runtime_visible_annotations_length,
3906 parsed_annotations,
3907 _loader_data,
3908 _can_access_vm_annotations);
3909 cfs->skip_u1_fast(runtime_visible_annotations_length);
3910 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3911 if (runtime_invisible_annotations_exists) {
3912 classfile_parse_error(
3913 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3914 return;
3915 }
3916 runtime_invisible_annotations_exists = true;
3917 if (PreserveAllAnnotations) {
3918 runtime_invisible_annotations_length = attribute_length;
3919 runtime_invisible_annotations = cfs->current();
3920 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3921 }
3922 cfs->skip_u1(attribute_length, CHECK);
3923 } else if (tag == vmSymbols::tag_enclosing_method()) {
3924 if (parsed_enclosingmethod_attribute) {
3925 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3926 return;
3927 } else {
3928 parsed_enclosingmethod_attribute = true;
3929 }
3930 guarantee_property(attribute_length == 4,
3931 "Wrong EnclosingMethod attribute length %u in class file %s",
3932 attribute_length, CHECK);
3933 cfs->guarantee_more(4, CHECK); // class_index, method_index
3934 enclosing_method_class_index = cfs->get_u2_fast();
3935 enclosing_method_method_index = cfs->get_u2_fast();
3936 if (enclosing_method_class_index == 0) {
3937 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3938 return;
3939 }
3940 // Validate the constant pool indices and types
3941 check_property(valid_klass_reference_at(enclosing_method_class_index),
3942 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3943 if (enclosing_method_method_index != 0 &&
3944 (!cp->is_within_bounds(enclosing_method_method_index) ||
3945 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3946 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3947 return;
3948 }
3949 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3950 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3951 if (parsed_bootstrap_methods_attribute) {
3952 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3953 return;
3954 }
3955 parsed_bootstrap_methods_attribute = true;
3956 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3957 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3958 if (runtime_visible_type_annotations != NULL) {
3959 classfile_parse_error(
3960 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3961 return;
3962 }
3963 runtime_visible_type_annotations_length = attribute_length;
3964 runtime_visible_type_annotations = cfs->current();
3965 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3966 // No need for the VM to parse Type annotations
3967 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3968 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3969 if (runtime_invisible_type_annotations_exists) {
3970 classfile_parse_error(
3971 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3972 return;
3973 } else {
3974 runtime_invisible_type_annotations_exists = true;
3975 }
3976 if (PreserveAllAnnotations) {
3977 runtime_invisible_type_annotations_length = attribute_length;
3978 runtime_invisible_type_annotations = cfs->current();
3979 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3980 }
3981 cfs->skip_u1(attribute_length, CHECK);
3982 } else if (_major_version >= JAVA_11_VERSION) {
3983 if (tag == vmSymbols::tag_nest_members()) {
3984 // Check for NestMembers tag
3985 if (parsed_nest_members_attribute) {
3986 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3987 return;
3988 } else {
3989 parsed_nest_members_attribute = true;
3990 }
3991 if (parsed_nest_host_attribute) {
3992 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3993 return;
3994 }
3995 nest_members_attribute_start = cfs->current();
3996 nest_members_attribute_length = attribute_length;
3997 cfs->skip_u1(nest_members_attribute_length, CHECK);
3998 } else if (tag == vmSymbols::tag_nest_host()) {
3999 if (parsed_nest_host_attribute) {
4000 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
4001 return;
4002 } else {
4003 parsed_nest_host_attribute = true;
4004 }
4005 if (parsed_nest_members_attribute) {
4006 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
4007 return;
4008 }
4009 if (_need_verify) {
4010 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
4011 }
4012 cfs->guarantee_more(2, CHECK);
4013 u2 class_info_index = cfs->get_u2_fast();
4014 check_property(
4015 valid_klass_reference_at(class_info_index),
4016 "Nest-host class_info_index %u has bad constant type in class file %s",
4017 class_info_index, CHECK);
4018 _nest_host = class_info_index;
4019
4020 } else if (_major_version >= JAVA_16_VERSION) {
4021 if (tag == vmSymbols::tag_record()) {
4022 if (parsed_record_attribute) {
4023 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
4024 return;
4025 }
4026 parsed_record_attribute = true;
4027 record_attribute_start = cfs->current();
4028 record_attribute_length = attribute_length;
4029 } else if (_major_version >= JAVA_17_VERSION) {
4030 if (tag == vmSymbols::tag_permitted_subclasses()) {
4031 if (parsed_permitted_subclasses_attribute) {
4032 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
4033 return;
4034 }
4035 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
4036 if (_access_flags.is_final()) {
4037 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
4038 return;
4039 }
4040 parsed_permitted_subclasses_attribute = true;
4041 permitted_subclasses_attribute_start = cfs->current();
4042 permitted_subclasses_attribute_length = attribute_length;
4043 }
4044 if (EnableValhalla && tag == vmSymbols::tag_preload()) {
4045 if (parsed_preload_attribute) {
4046 classfile_parse_error("Multiple Preload attributes in class file %s", CHECK);
4047 return;
4048 }
4049 parsed_preload_attribute = true;
4050 preload_attribute_start = cfs->current();
4051 preload_attribute_length = attribute_length;
4052 }
4053 }
4054 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
4055 cfs->skip_u1(attribute_length, CHECK);
4056 } else {
4057 // Unknown attribute
4058 cfs->skip_u1(attribute_length, CHECK);
4059 }
4060 } else {
4061 // Unknown attribute
4062 cfs->skip_u1(attribute_length, CHECK);
4063 }
4064 } else {
4065 // Unknown attribute
4066 cfs->skip_u1(attribute_length, CHECK);
4067 }
4068 }
4069 _class_annotations = assemble_annotations(runtime_visible_annotations,
4070 runtime_visible_annotations_length,
4071 runtime_invisible_annotations,
4072 runtime_invisible_annotations_length,
4073 CHECK);
4074 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
4075 runtime_visible_type_annotations_length,
4076 runtime_invisible_type_annotations,
4077 runtime_invisible_type_annotations_length,
4078 CHECK);
4079
4080 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
4081 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
4082 cfs,
4083 cp,
4084 inner_classes_attribute_start,
4085 parsed_innerclasses_attribute,
4086 enclosing_method_class_index,
4087 enclosing_method_method_index,
4088 CHECK);
4089 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
4090 guarantee_property(
4091 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
4092 "Wrong InnerClasses attribute length in class file %s", CHECK);
4093 }
4094 }
4095
4096 if (parsed_nest_members_attribute) {
4097 const u2 num_of_classes = parse_classfile_nest_members_attribute(
4098 cfs,
4099 nest_members_attribute_start,
4100 CHECK);
4101 if (_need_verify) {
4102 guarantee_property(
4103 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
4104 "Wrong NestMembers attribute length in class file %s", CHECK);
4105 }
4106 }
4107
4108 if (parsed_record_attribute) {
4109 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
4110 cfs,
4111 cp,
4112 record_attribute_start,
4113 CHECK);
4114 if (_need_verify) {
4115 guarantee_property(record_attribute_length == calculated_attr_length,
4116 "Record attribute has wrong length in class file %s",
4117 CHECK);
4118 }
4119 }
4120
4121 if (parsed_permitted_subclasses_attribute) {
4122 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
4123 cfs,
4124 permitted_subclasses_attribute_start,
4125 CHECK);
4126 if (_need_verify) {
4127 guarantee_property(
4128 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
4129 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
4130 }
4131 }
4132
4133 if (parsed_preload_attribute) {
4134 const u2 num_classes = parse_classfile_preload_attribute(
4135 cfs,
4136 preload_attribute_start,
4137 CHECK);
4138 if (_need_verify) {
4139 guarantee_property(
4140 preload_attribute_length == sizeof(num_classes) + sizeof(u2) * num_classes,
4141 "Wrong Preload attribute length in class file %s", CHECK);
4142 }
4143 }
4144
4145 if (_max_bootstrap_specifier_index >= 0) {
4146 guarantee_property(parsed_bootstrap_methods_attribute,
4147 "Missing BootstrapMethods attribute in class file %s", CHECK);
4148 }
4149 }
4150
4151 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
4152 assert(k != NULL, "invariant");
4153
4154 if (_synthetic_flag)
4155 k->set_is_synthetic();
4156 if (_sourcefile_index != 0) {
4157 k->set_source_file_name_index(_sourcefile_index);
4158 }
4159 if (_generic_signature_index != 0) {
4160 k->set_generic_signature_index(_generic_signature_index);
4161 }
4162 if (_sde_buffer != NULL) {
4163 k->set_source_debug_extension(_sde_buffer, _sde_length);
4164 }
4165 }
4166
4167 // Create the Annotations object that will
4168 // hold the annotations array for the Klass.
4169 void ClassFileParser::create_combined_annotations(TRAPS) {
4170 if (_class_annotations == NULL &&
4171 _class_type_annotations == NULL &&
4172 _fields_annotations == NULL &&
4173 _fields_type_annotations == NULL) {
4174 // Don't create the Annotations object unnecessarily.
4175 return;
4176 }
4177
4178 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
4179 annotations->set_class_annotations(_class_annotations);
4180 annotations->set_class_type_annotations(_class_type_annotations);
4181 annotations->set_fields_annotations(_fields_annotations);
4182 annotations->set_fields_type_annotations(_fields_type_annotations);
4183
4184 // This is the Annotations object that will be
4185 // assigned to InstanceKlass being constructed.
4186 _combined_annotations = annotations;
4187
4188 // The annotations arrays below has been transferred the
4189 // _combined_annotations so these fields can now be cleared.
4190 _class_annotations = NULL;
4191 _class_type_annotations = NULL;
4192 _fields_annotations = NULL;
4193 _fields_type_annotations = NULL;
4194 }
4195
4196 // Transfer ownership of metadata allocated to the InstanceKlass.
4197 void ClassFileParser::apply_parsed_class_metadata(
4198 InstanceKlass* this_klass,
4199 int java_fields_count) {
4200 assert(this_klass != NULL, "invariant");
4201
4202 _cp->set_pool_holder(this_klass);
4203 this_klass->set_constants(_cp);
4204 this_klass->set_fields(_fields, java_fields_count);
4205 this_klass->set_methods(_methods);
4206 this_klass->set_inner_classes(_inner_classes);
4207 this_klass->set_nest_members(_nest_members);
4208 this_klass->set_nest_host_index(_nest_host);
4209 this_klass->set_preload_classes(_preload_classes);
4210 this_klass->set_annotations(_combined_annotations);
4211 this_klass->set_permitted_subclasses(_permitted_subclasses);
4212 this_klass->set_record_components(_record_components);
4213 // Delay the setting of _local_interfaces and _transitive_interfaces until after
4214 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
4215 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
4216 // its _super. If an OOM occurs while loading the current klass, its _super field
4217 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
4218 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
4219 // dereferences to the deallocated _transitive_interfaces will result in a crash.
4220
4221 // Clear out these fields so they don't get deallocated by the destructor
4222 clear_class_metadata();
4223 }
4224
4225 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
4226 int runtime_visible_annotations_length,
4227 const u1* const runtime_invisible_annotations,
4228 int runtime_invisible_annotations_length,
4229 TRAPS) {
4230 AnnotationArray* annotations = NULL;
4231 if (runtime_visible_annotations != NULL ||
4232 runtime_invisible_annotations != NULL) {
4233 annotations = MetadataFactory::new_array<u1>(_loader_data,
4234 runtime_visible_annotations_length +
4235 runtime_invisible_annotations_length,
4236 CHECK_(annotations));
4237 if (runtime_visible_annotations != NULL) {
4238 for (int i = 0; i < runtime_visible_annotations_length; i++) {
4239 annotations->at_put(i, runtime_visible_annotations[i]);
4240 }
4241 }
4242 if (runtime_invisible_annotations != NULL) {
4243 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
4244 int append = runtime_visible_annotations_length+i;
4245 annotations->at_put(append, runtime_invisible_annotations[i]);
4246 }
4247 }
4248 }
4249 return annotations;
4250 }
4251
4252 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
4253 const int super_class_index,
4254 const bool need_verify,
4255 TRAPS) {
4256 assert(cp != NULL, "invariant");
4257 const InstanceKlass* super_klass = NULL;
4258
4259 if (super_class_index == 0) {
4260 check_property(_class_name == vmSymbols::java_lang_Object(),
4261 "Invalid superclass index 0 in class file %s",
4262 CHECK_NULL);
4263 } else {
4264 check_property(valid_klass_reference_at(super_class_index),
4265 "Invalid superclass index %u in class file %s",
4266 super_class_index,
4267 CHECK_NULL);
4268 // The class name should be legal because it is checked when parsing constant pool.
4269 // However, make sure it is not an array type.
4270 if (cp->tag_at(super_class_index).is_klass()) {
4271 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
4272 }
4273 if (need_verify) {
4274 bool is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
4275 guarantee_property(!is_array,
4276 "Bad superclass name in class file %s", CHECK_NULL);
4277 }
4278 }
4279 return super_klass;
4280 }
4281
4282 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
4283 _max_nonstatic_oop_maps = max_blocks;
4284 _nonstatic_oop_map_count = 0;
4285 if (max_blocks == 0) {
4286 _nonstatic_oop_maps = NULL;
4287 } else {
4288 _nonstatic_oop_maps =
4289 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
4290 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
4291 }
4292 }
4293
4294 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
4295 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
4296 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
4297 }
4298
4299 // addition of super oop maps
4300 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
4301 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
4302 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
4303
4304 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
4305 _nonstatic_oop_map_count += nof_blocks;
4306 }
4307
4308 // collection of oops
4309 void OopMapBlocksBuilder::add(int offset, int count) {
4310 if (_nonstatic_oop_map_count == 0) {
4311 _nonstatic_oop_map_count++;
4312 }
4313 OopMapBlock* nonstatic_oop_map = last_oop_map();
4314 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
4315 nonstatic_oop_map->set_offset(offset);
4316 nonstatic_oop_map->set_count(count);
4317 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
4318 nonstatic_oop_map->increment_count(count);
4319 } else { // Need a new one...
4320 _nonstatic_oop_map_count++;
4321 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
4322 nonstatic_oop_map = last_oop_map();
4323 nonstatic_oop_map->set_offset(offset);
4324 nonstatic_oop_map->set_count(count);
4325 }
4326 }
4327
4328 // general purpose copy, e.g. into allocated instanceKlass
4329 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
4330 if (_nonstatic_oop_map_count != 0) {
4331 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
4332 }
4333 }
4334
4335 // Sort and compact adjacent blocks
4336 void OopMapBlocksBuilder::compact() {
4337 if (_nonstatic_oop_map_count <= 1) {
4338 return;
4339 }
4340 /*
4341 * Since field layout sneaks in oops before values, we will be able to condense
4342 * blocks. There is potential to compact between super, own refs and values
4343 * containing refs.
4344 *
4345 * Currently compaction is slightly limited due to values being 8 byte aligned.
4346 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
4347 * and maybe it doesn't need to be.
4348 */
4349 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
4350 (_sort_Fn)OopMapBlock::compare_offset);
4351 if (_nonstatic_oop_map_count < 2) {
4352 return;
4353 }
4354
4355 // Make a temp copy, and iterate through and copy back into the original
4356 ResourceMark rm;
4357 OopMapBlock* oop_maps_copy =
4358 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
4359 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
4360 copy(oop_maps_copy);
4361 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
4362 unsigned int new_count = 1;
4363 oop_maps_copy++;
4364 while(oop_maps_copy < oop_maps_copy_end) {
4365 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
4366 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
4367 nonstatic_oop_map->increment_count(oop_maps_copy->count());
4368 } else {
4369 nonstatic_oop_map++;
4370 new_count++;
4371 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
4372 nonstatic_oop_map->set_count(oop_maps_copy->count());
4373 }
4374 oop_maps_copy++;
4375 }
4376 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
4377 _nonstatic_oop_map_count = new_count;
4378 }
4379
4380 void OopMapBlocksBuilder::print_on(outputStream* st) const {
4381 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
4382 if (_nonstatic_oop_map_count > 0) {
4383 OopMapBlock* map = _nonstatic_oop_maps;
4384 OopMapBlock* last_map = last_oop_map();
4385 assert(map <= last_map, "Last less than first");
4386 while (map <= last_map) {
4387 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
4388 map->offset() + map->offset_span() - heapOopSize, map->count());
4389 map++;
4390 }
4391 }
4392 }
4393
4394 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
4395 print_on(st);
4396 }
4397
4398 void ClassFileParser::throwInlineTypeLimitation(THREAD_AND_LOCATION_DECL,
4399 const char* msg,
4400 const Symbol* name,
4401 const Symbol* sig) const {
4402
4403 ResourceMark rm(THREAD);
4404 if (name == NULL || sig == NULL) {
4405 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4406 vmSymbols::java_lang_ClassFormatError(),
4407 "class: %s - %s", _class_name->as_C_string(), msg);
4408 }
4409 else {
4410 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4411 vmSymbols::java_lang_ClassFormatError(),
4412 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
4413 _class_name->as_C_string(), msg);
4414 }
4415 }
4416
4417 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4418 assert(ik != NULL, "invariant");
4419
4420 const Klass* const super = ik->super();
4421
4422 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4423 // in which case we don't have to register objects as finalizable
4424 if (!_has_empty_finalizer) {
4425 if (_has_finalizer ||
4426 (super != NULL && super->has_finalizer())) {
4427 ik->set_has_finalizer();
4428 }
4429 }
4430
4431 #ifdef ASSERT
4432 bool f = false;
4433 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4434 vmSymbols::void_method_signature());
4435 if (InstanceKlass::is_finalization_enabled() &&
4436 (m != NULL) && !m->is_empty_method()) {
4437 f = true;
4438 }
4439
4440 // Spec doesn't prevent agent from redefinition of empty finalizer.
4441 // Despite the fact that it's generally bad idea and redefined finalizer
4442 // will not work as expected we shouldn't abort vm in this case
4443 if (!ik->has_redefined_this_or_super()) {
4444 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4445 }
4446 #endif
4447
4448 // Check if this klass supports the java.lang.Cloneable interface
4449 if (vmClasses::Cloneable_klass_loaded()) {
4450 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
4451 if (ik->is_inline_klass()) {
4452 JavaThread *THREAD = JavaThread::current();
4453 throwInlineTypeLimitation(THREAD_AND_LOCATION, "Inline Types do not support Cloneable");
4454 return;
4455 }
4456 ik->set_is_cloneable();
4457 }
4458 }
4459
4460 // Check if this klass has a vanilla default constructor
4461 if (super == NULL) {
4462 // java.lang.Object has empty default constructor
4463 ik->set_has_vanilla_constructor();
4464 } else {
4465 if (super->has_vanilla_constructor() &&
4466 _has_vanilla_constructor) {
4467 ik->set_has_vanilla_constructor();
4468 }
4469 #ifdef ASSERT
4470 bool v = false;
4471 if (super->has_vanilla_constructor()) {
4472 const Method* const constructor =
4473 ik->find_method(vmSymbols::object_initializer_name(),
4474 vmSymbols::void_method_signature());
4475 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4476 v = true;
4477 }
4478 }
4479 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4480 #endif
4481 }
4482
4483 // If it cannot be fast-path allocated, set a bit in the layout helper.
4484 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4485 assert(ik->size_helper() > 0, "layout_helper is initialized");
4486 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4487 || ik->is_abstract() || ik->is_interface()
4488 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4489 || ik->size_helper() >= FastAllocateSizeLimit) {
4490 // Forbid fast-path allocation.
4491 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4492 ik->set_layout_helper(lh);
4493 }
4494 }
4495
4496 bool ClassFileParser::supports_inline_types() const {
4497 // Inline types are only supported by class file version 61.65535 and later
4498 return _major_version > JAVA_20_VERSION ||
4499 (_major_version == JAVA_20_VERSION /*&& _minor_version == JAVA_PREVIEW_MINOR_VERSION*/); // JAVA_PREVIEW_MINOR_VERSION not yet implemented by javac, check JVMS draft
4500 }
4501
4502 // utility methods for appending an array with check for duplicates
4503
4504 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4505 const Array<InstanceKlass*>* const ifs) {
4506 // iterate over new interfaces
4507 for (int i = 0; i < ifs->length(); i++) {
4508 InstanceKlass* const e = ifs->at(i);
4509 assert(e->is_klass() && e->is_interface(), "just checking");
4510 // add new interface
4511 result->append_if_missing(e);
4512 }
4513 }
4514
4515 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4516 Array<InstanceKlass*>* local_ifs,
4517 ClassLoaderData* loader_data,
4518 TRAPS) {
4519 assert(local_ifs != NULL, "invariant");
4520 assert(loader_data != NULL, "invariant");
4521
4522 // Compute maximum size for transitive interfaces
4523 int max_transitive_size = 0;
4524 int super_size = 0;
4525 // Add superclass transitive interfaces size
4526 if (super != NULL) {
4527 super_size = super->transitive_interfaces()->length();
4528 max_transitive_size += super_size;
4529 }
4530 // Add local interfaces' super interfaces
4531 const int local_size = local_ifs->length();
4532 for (int i = 0; i < local_size; i++) {
4533 InstanceKlass* const l = local_ifs->at(i);
4534 max_transitive_size += l->transitive_interfaces()->length();
4535 }
4536 // Finally add local interfaces
4537 max_transitive_size += local_size;
4538 // Construct array
4539 if (max_transitive_size == 0) {
4540 // no interfaces, use canonicalized array
4541 return Universe::the_empty_instance_klass_array();
4542 } else if (max_transitive_size == super_size) {
4543 // no new local interfaces added, share superklass' transitive interface array
4544 return super->transitive_interfaces();
4545 // The three lines below are commented to work around bug JDK-8245487
4546 // } else if (max_transitive_size == local_size) {
4547 // // only local interfaces added, share local interface array
4548 // return local_ifs;
4549 } else {
4550 ResourceMark rm;
4551 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4552
4553 // Copy down from superclass
4554 if (super != NULL) {
4555 append_interfaces(result, super->transitive_interfaces());
4556 }
4557
4558 // Copy down from local interfaces' superinterfaces
4559 for (int i = 0; i < local_size; i++) {
4560 InstanceKlass* const l = local_ifs->at(i);
4561 append_interfaces(result, l->transitive_interfaces());
4562 }
4563 // Finally add local interfaces
4564 append_interfaces(result, local_ifs);
4565
4566 // length will be less than the max_transitive_size if duplicates were removed
4567 const int length = result->length();
4568 assert(length <= max_transitive_size, "just checking");
4569
4570 Array<InstanceKlass*>* const new_result =
4571 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4572 for (int i = 0; i < length; i++) {
4573 InstanceKlass* const e = result->at(i);
4574 assert(e != NULL, "just checking");
4575 new_result->at_put(i, e);
4576 }
4577 return new_result;
4578 }
4579 }
4580
4581 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4582 assert(this_klass != NULL, "invariant");
4583 const Klass* const super = this_klass->super();
4584
4585 if (super != NULL) {
4586 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4587
4588 if (super->is_final()) {
4589 classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4590 return;
4591 }
4592
4593 if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4594 classfile_icce_error("class %s cannot inherit from sealed class %s", super_ik, THREAD);
4595 return;
4596 }
4597
4598 // The JVMS says that super classes for value types must not have the ACC_IDENTITY
4599 // flag set. But, java.lang.Object must still be allowed to be a direct super class
4600 // for a value classes. So, it is treated as a special case for now.
4601 if (this_klass->access_flags().is_value_class() &&
4602 super_ik->name() != vmSymbols::java_lang_Object() &&
4603 super_ik->is_identity_class()) {
4604 classfile_icce_error("value class %s cannot inherit from class %s", super_ik, THREAD);
4605 return;
4606 }
4607
4608 // If the loader is not the boot loader then throw an exception if its
4609 // superclass is in package jdk.internal.reflect and its loader is not a
4610 // special reflection class loader
4611 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4612 PackageEntry* super_package = super->package();
4613 if (super_package != NULL &&
4614 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4615 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4616 ResourceMark rm(THREAD);
4617 Exceptions::fthrow(
4618 THREAD_AND_LOCATION,
4619 vmSymbols::java_lang_IllegalAccessError(),
4620 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4621 this_klass->external_name(),
4622 this_klass->class_loader_data()->loader_name_and_id(),
4623 super->external_name());
4624 return;
4625 }
4626 }
4627
4628 Reflection::VerifyClassAccessResults vca_result =
4629 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4630 if (vca_result != Reflection::ACCESS_OK) {
4631 ResourceMark rm(THREAD);
4632 char* msg = Reflection::verify_class_access_msg(this_klass,
4633 InstanceKlass::cast(super),
4634 vca_result);
4635 if (msg == NULL) {
4636 bool same_module = (this_klass->module() == super->module());
4637 Exceptions::fthrow(
4638 THREAD_AND_LOCATION,
4639 vmSymbols::java_lang_IllegalAccessError(),
4640 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4641 this_klass->external_name(),
4642 super->is_abstract() ? "abstract " : "",
4643 super->external_name(),
4644 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4645 (same_module) ? "" : "; ",
4646 (same_module) ? "" : super->class_in_module_of_loader());
4647 } else {
4648 // Add additional message content.
4649 Exceptions::fthrow(
4650 THREAD_AND_LOCATION,
4651 vmSymbols::java_lang_IllegalAccessError(),
4652 "superclass access check failed: %s",
4653 msg);
4654 }
4655 }
4656 }
4657 }
4658
4659
4660 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4661 assert(this_klass != NULL, "invariant");
4662 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4663 const int lng = local_interfaces->length();
4664 for (int i = lng - 1; i >= 0; i--) {
4665 InstanceKlass* const k = local_interfaces->at(i);
4666 assert (k != NULL && k->is_interface(), "invalid interface");
4667
4668 if (k->is_sealed() && !k->has_as_permitted_subclass(this_klass)) {
4669 classfile_icce_error(this_klass->is_interface() ?
4670 "class %s cannot extend sealed interface %s" :
4671 "class %s cannot implement sealed interface %s",
4672 k, THREAD);
4673 return;
4674 }
4675
4676 Reflection::VerifyClassAccessResults vca_result =
4677 Reflection::verify_class_access(this_klass, k, false);
4678 if (vca_result != Reflection::ACCESS_OK) {
4679 ResourceMark rm(THREAD);
4680 char* msg = Reflection::verify_class_access_msg(this_klass,
4681 k,
4682 vca_result);
4683 if (msg == NULL) {
4684 bool same_module = (this_klass->module() == k->module());
4685 Exceptions::fthrow(
4686 THREAD_AND_LOCATION,
4687 vmSymbols::java_lang_IllegalAccessError(),
4688 "class %s cannot access its superinterface %s (%s%s%s)",
4689 this_klass->external_name(),
4690 k->external_name(),
4691 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4692 (same_module) ? "" : "; ",
4693 (same_module) ? "" : k->class_in_module_of_loader());
4694 } else {
4695 // Add additional message content.
4696 Exceptions::fthrow(
4697 THREAD_AND_LOCATION,
4698 vmSymbols::java_lang_IllegalAccessError(),
4699 "superinterface check failed: %s",
4700 msg);
4701 }
4702 }
4703 }
4704 }
4705
4706
4707 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4708 assert(this_klass != NULL, "invariant");
4709 const Array<Method*>* const methods = this_klass->methods();
4710 const int num_methods = methods->length();
4711
4712 // go thru each method and check if it overrides a final method
4713 for (int index = 0; index < num_methods; index++) {
4714 const Method* const m = methods->at(index);
4715
4716 // skip private, static, and <init> methods
4717 if ((!m->is_private() && !m->is_static()) &&
4718 (m->name() != vmSymbols::object_initializer_name())) {
4719
4720 const Symbol* const name = m->name();
4721 const Symbol* const signature = m->signature();
4722 const Klass* k = this_klass->super();
4723 const Method* super_m = NULL;
4724 while (k != NULL) {
4725 // skip supers that don't have final methods.
4726 if (k->has_final_method()) {
4727 // lookup a matching method in the super class hierarchy
4728 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4729 if (super_m == NULL) {
4730 break; // didn't find any match; get out
4731 }
4732
4733 if (super_m->is_final() && !super_m->is_static() &&
4734 !super_m->access_flags().is_private()) {
4735 // matching method in super is final, and not static or private
4736 bool can_access = Reflection::verify_member_access(this_klass,
4737 super_m->method_holder(),
4738 super_m->method_holder(),
4739 super_m->access_flags(),
4740 false, false, CHECK);
4741 if (can_access) {
4742 // this class can access super final method and therefore override
4743 ResourceMark rm(THREAD);
4744 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4745 err_msg("class %s overrides final method %s.%s%s",
4746 this_klass->external_name(),
4747 super_m->method_holder()->external_name(),
4748 name->as_C_string(),
4749 signature->as_C_string()));
4750 }
4751 }
4752
4753 // continue to look from super_m's holder's super.
4754 k = super_m->method_holder()->super();
4755 continue;
4756 }
4757
4758 k = k->super();
4759 }
4760 }
4761 }
4762 }
4763
4764
4765 // assumes that this_klass is an interface
4766 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4767 assert(this_klass != NULL, "invariant");
4768 assert(this_klass->is_interface(), "not an interface");
4769 const Array<Method*>* methods = this_klass->methods();
4770 const int num_methods = methods->length();
4771
4772 for (int index = 0; index < num_methods; index++) {
4773 const Method* const m = methods->at(index);
4774 // if m is static and not the init method, throw a verify error
4775 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4776 ResourceMark rm(THREAD);
4777 Exceptions::fthrow(
4778 THREAD_AND_LOCATION,
4779 vmSymbols::java_lang_VerifyError(),
4780 "Illegal static method %s in interface %s",
4781 m->name()->as_C_string(),
4782 this_klass->external_name()
4783 );
4784 return;
4785 }
4786 }
4787 }
4788
4789 // utility methods for format checking
4790
4791 void ClassFileParser::verify_legal_class_modifiers(jint flags, const char* name, bool is_Object, TRAPS) const {
4792 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4793 const bool is_value_class = (flags & JVM_ACC_VALUE) != 0;
4794 const bool is_primitive_class = (flags & JVM_ACC_PRIMITIVE) != 0;
4795 const bool is_identity_class = (flags & JVM_ACC_IDENTITY) != 0;
4796 const bool is_inner_class = name != NULL;
4797 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4798 if (is_module) {
4799 ResourceMark rm(THREAD);
4800 Exceptions::fthrow(
4801 THREAD_AND_LOCATION,
4802 vmSymbols::java_lang_NoClassDefFoundError(),
4803 "%s is not a class because access_flag ACC_MODULE is set",
4804 _class_name->as_C_string());
4805 return;
4806 }
4807
4808 if (is_value_class && !EnableValhalla) {
4809 ResourceMark rm(THREAD);
4810 Exceptions::fthrow(
4811 THREAD_AND_LOCATION,
4812 vmSymbols::java_lang_ClassFormatError(),
4813 "Class modifier ACC_VALUE in class %s requires option -XX:+EnableValhalla",
4814 _class_name->as_C_string()
4815 );
4816 return;
4817 }
4818
4819 if (is_primitive_class && !EnablePrimitiveClasses) {
4820 ResourceMark rm(THREAD);
4821 Exceptions::fthrow(
4822 THREAD_AND_LOCATION,
4823 vmSymbols::java_lang_ClassFormatError(),
4824 "Class modifier ACC_PRIMITIVE in class %s requires option -XX:+EnablePrimitiveClasses",
4825 _class_name->as_C_string()
4826 );
4827 return;
4828 }
4829
4830 // if (!_need_verify) { return; }
4831
4832 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4833 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4834 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4835 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4836 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4837 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4838 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4839
4840 if ((is_abstract && is_final) ||
4841 (is_interface && !is_abstract) ||
4842 (is_interface && major_gte_1_5 && ((is_super && (!EnableValhalla || !supports_inline_types())) || is_enum)) || // ACC_SUPER (now ACC_IDENTITY) was illegal for interfaces
4843 (!is_interface && major_gte_1_5 && is_annotation) ||
4844 (is_value_class && is_enum) ||
4845 (is_identity_class && is_value_class) ||
4846 (EnableValhalla && supports_inline_types() && !is_module && !is_abstract && !is_Object && !(is_identity_class || is_value_class) && !is_inner_class) ||
4847 (EnablePrimitiveClasses && supports_inline_types() && is_primitive_class && (!is_value_class || !is_final || is_interface || is_abstract))) {
4848 ResourceMark rm(THREAD);
4849 const char* class_note = "";
4850 if (is_value_class) class_note = " (a value class)";
4851 if (is_primitive_class) class_note = " (a primitive class)";
4852 if (is_value_class && is_identity_class) class_note = " (a value and identity class)";
4853 if (name == NULL) { // Not an inner class
4854 Exceptions::fthrow(
4855 THREAD_AND_LOCATION,
4856 vmSymbols::java_lang_ClassFormatError(),
4857 "Illegal class modifiers in class %s%s: 0x%X",
4858 _class_name->as_C_string(), class_note, flags
4859 );
4860 return;
4861 } else {
4862 Exceptions::fthrow(
4863 THREAD_AND_LOCATION,
4864 vmSymbols::java_lang_ClassFormatError(),
4865 "Illegal class modifiers in declaration of inner class %s%s of class %s: 0x%X",
4866 name, class_note, _class_name->as_C_string(), flags
4867 );
4868 return;
4869 }
4870 }
4871 }
4872
4873 static bool has_illegal_visibility(jint flags) {
4874 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4875 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4876 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4877
4878 return ((is_public && is_protected) ||
4879 (is_public && is_private) ||
4880 (is_protected && is_private));
4881 }
4882
4883 // A legal major_version.minor_version must be one of the following:
4884 //
4885 // Major_version >= 45 and major_version < 56, any minor_version.
4886 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4887 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4888 //
4889 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4890 ResourceMark rm(THREAD);
4891 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4892 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4893 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4894 class_name, major, minor, THREAD);
4895 return;
4896 }
4897
4898 if (major > max_version) {
4899 Exceptions::fthrow(
4900 THREAD_AND_LOCATION,
4901 vmSymbols::java_lang_UnsupportedClassVersionError(),
4902 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4903 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4904 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4905 return;
4906 }
4907
4908 if (major < JAVA_12_VERSION || minor == 0) {
4909 return;
4910 }
4911
4912 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4913 if (major != max_version) {
4914 Exceptions::fthrow(
4915 THREAD_AND_LOCATION,
4916 vmSymbols::java_lang_UnsupportedClassVersionError(),
4917 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4918 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4919 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4920 return;
4921 }
4922
4923 if (!Arguments::enable_preview()) {
4924 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4925 class_name, major, minor, THREAD);
4926 return;
4927 }
4928
4929 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4930 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4931 class_name, major, minor, THREAD);
4932 }
4933 }
4934
4935 void ClassFileParser:: verify_legal_field_modifiers(jint flags,
4936 AccessFlags class_access_flags,
4937 TRAPS) const {
4938 if (!_need_verify) { return; }
4939
4940 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4941 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4942 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4943 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4944 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4945 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4946 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4947 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4948 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4949
4950 const bool is_interface = class_access_flags.is_interface();
4951 const bool is_abstract = class_access_flags.is_abstract();
4952 const bool is_value_class = class_access_flags.is_value_class();
4953 const bool is_identity_class = class_access_flags.is_identity_class();
4954
4955 bool is_illegal = false;
4956
4957 if (is_interface) {
4958 if (!is_public || !is_static || !is_final || is_private ||
4959 is_protected || is_volatile || is_transient ||
4960 (major_gte_1_5 && is_enum)) {
4961 is_illegal = true;
4962 }
4963 } else { // not interface
4964 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4965 is_illegal = true;
4966 } else {
4967 if (is_value_class && !is_abstract && !is_static && !is_final) {
4968 is_illegal = true;
4969 } else if (is_abstract && !is_identity_class && !is_static) {
4970 is_illegal = true;
4971 }
4972 }
4973 }
4974
4975 if (is_illegal) {
4976 ResourceMark rm(THREAD);
4977 Exceptions::fthrow(
4978 THREAD_AND_LOCATION,
4979 vmSymbols::java_lang_ClassFormatError(),
4980 "Illegal field modifiers in class %s: 0x%X",
4981 _class_name->as_C_string(), flags);
4982 return;
4983 }
4984 }
4985
4986 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4987 AccessFlags class_access_flags,
4988 const Symbol* name,
4989 TRAPS) const {
4990 if (!_need_verify) { return; }
4991
4992 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4993 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4994 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4995 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4996 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4997 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4998 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4999 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
5000 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
5001 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5002 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
5003 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
5004 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
5005 const bool is_initializer = (name == vmSymbols::object_initializer_name());
5006 const bool is_factory = (name == vmSymbols::inline_factory_name() && supports_inline_types());
5007 const bool is_interface = class_access_flags.is_interface();
5008 const bool is_value_class = class_access_flags.is_value_class();
5009 const bool is_identity_class = class_access_flags.is_identity_class();
5010 const bool is_abstract_class = class_access_flags.is_abstract();
5011
5012 bool is_illegal = false;
5013
5014 const char* class_note = "";
5015 if (is_interface) {
5016 if (major_gte_8) {
5017 // Class file version is JAVA_8_VERSION or later Methods of
5018 // interfaces may set any of the flags except ACC_PROTECTED,
5019 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
5020 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
5021 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
5022 (is_native || is_protected || is_final || is_synchronized) ||
5023 // If a specific method of a class or interface has its
5024 // ACC_ABSTRACT flag set, it must not have any of its
5025 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
5026 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
5027 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
5028 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
5029 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
5030 is_illegal = true;
5031 }
5032 } else if (major_gte_1_5) {
5033 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
5034 if (!is_public || is_private || is_protected || is_static || is_final ||
5035 is_synchronized || is_native || !is_abstract || is_strict) {
5036 is_illegal = true;
5037 }
5038 } else {
5039 // Class file version is pre-JAVA_1_5_VERSION
5040 if (!is_public || is_static || is_final || is_native || !is_abstract) {
5041 is_illegal = true;
5042 }
5043 }
5044 } else { // not interface
5045 if (has_illegal_visibility(flags)) {
5046 is_illegal = true;
5047 } else {
5048 if (is_factory) { // <vnew> factory method
5049 if (is_final || is_synchronized || is_native || !is_static ||
5050 is_abstract || is_bridge) {
5051 is_illegal = true;
5052 class_note = (is_value_class ? " (a value class)" : " (not a value class)");
5053 }
5054 } else if (is_initializer) {
5055 if (is_static || is_final || is_synchronized || is_native ||
5056 is_abstract || (major_gte_1_5 && is_bridge)) {
5057 is_illegal = true;
5058 }
5059 } else { // not initializer
5060 if (!is_identity_class && is_synchronized && !is_static) {
5061 is_illegal = true;
5062 class_note = " (not an identity class)";
5063 } else {
5064 if (is_abstract) {
5065 if ((is_final || is_native || is_private || is_static ||
5066 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
5067 is_illegal = true;
5068 }
5069 }
5070 }
5071 }
5072 }
5073 }
5074
5075 if (is_illegal) {
5076 ResourceMark rm(THREAD);
5077 if (is_value_class && is_initializer) {
5078 Exceptions::fthrow(
5079 THREAD_AND_LOCATION,
5080 vmSymbols::java_lang_ClassFormatError(),
5081 "Method <init> is not allowed in value class %s",
5082 _class_name->as_C_string());
5083 } else {
5084 Exceptions::fthrow(
5085 THREAD_AND_LOCATION,
5086 vmSymbols::java_lang_ClassFormatError(),
5087 "Method %s in class %s%s has illegal modifiers: 0x%X",
5088 name->as_C_string(), _class_name->as_C_string(),
5089 class_note, flags);
5090 }
5091 return;
5092 }
5093 }
5094
5095 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5096 int length,
5097 TRAPS) const {
5098 assert(_need_verify, "only called when _need_verify is true");
5099 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5100 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
5101 }
5102 }
5103
5104 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5105 // In class names, '/' separates unqualified names. This is verified in this function also.
5106 // Method names also may not contain the characters '<' or '>', unless <init>
5107 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5108 // method. Because these names have been checked as special cases before
5109 // calling this method in verify_legal_method_name.
5110 //
5111 // This method is also called from the modular system APIs in modules.cpp
5112 // to verify the validity of module and package names.
5113 bool ClassFileParser::verify_unqualified_name(const char* name,
5114 unsigned int length,
5115 int type) {
5116 if (length == 0) return false; // Must have at least one char.
5117 for (const char* p = name; p != name + length; p++) {
5118 switch(*p) {
5119 case JVM_SIGNATURE_DOT:
5120 case JVM_SIGNATURE_ENDCLASS:
5121 case JVM_SIGNATURE_ARRAY:
5122 // do not permit '.', ';', or '['
5123 return false;
5124 case JVM_SIGNATURE_SLASH:
5125 // check for '//' or leading or trailing '/' which are not legal
5126 // unqualified name must not be empty
5127 if (type == ClassFileParser::LegalClass) {
5128 if (p == name || p+1 >= name+length ||
5129 *(p+1) == JVM_SIGNATURE_SLASH) {
5130 return false;
5131 }
5132 } else {
5133 return false; // do not permit '/' unless it's class name
5134 }
5135 break;
5136 case JVM_SIGNATURE_SPECIAL:
5137 case JVM_SIGNATURE_ENDSPECIAL:
5138 // do not permit '<' or '>' in method names
5139 if (type == ClassFileParser::LegalMethod) {
5140 return false;
5141 }
5142 }
5143 }
5144 return true;
5145 }
5146
5147 // Take pointer to a UTF8 byte string (not NUL-terminated).
5148 // Skip over the longest part of the string that could
5149 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
5150 // Return a pointer to just past the fieldname.
5151 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5152 // being true, we saw consecutive slashes (meaning we were looking for a
5153 // qualified path but found something that was badly-formed).
5154 static const char* skip_over_field_name(const char* const name,
5155 bool slash_ok,
5156 unsigned int length) {
5157 const char* p;
5158 jboolean last_is_slash = false;
5159 jboolean not_first_ch = false;
5160
5161 for (p = name; p != name + length; not_first_ch = true) {
5162 const char* old_p = p;
5163 jchar ch = *p;
5164 if (ch < 128) {
5165 p++;
5166 // quick check for ascii
5167 if ((ch >= 'a' && ch <= 'z') ||
5168 (ch >= 'A' && ch <= 'Z') ||
5169 (ch == '_' || ch == '$') ||
5170 (not_first_ch && ch >= '0' && ch <= '9')) {
5171 last_is_slash = false;
5172 continue;
5173 }
5174 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
5175 if (last_is_slash) {
5176 return NULL; // Don't permit consecutive slashes
5177 }
5178 last_is_slash = true;
5179 continue;
5180 }
5181 }
5182 else {
5183 jint unicode_ch;
5184 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5185 p = tmp_p;
5186 last_is_slash = false;
5187 // Check if ch is Java identifier start or is Java identifier part
5188 // 4672820: call java.lang.Character methods directly without generating separate tables.
5189 EXCEPTION_MARK;
5190 // return value
5191 JavaValue result(T_BOOLEAN);
5192 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5193 JavaCallArguments args;
5194 args.push_int(unicode_ch);
5195
5196 if (not_first_ch) {
5197 // public static boolean isJavaIdentifierPart(char ch);
5198 JavaCalls::call_static(&result,
5199 vmClasses::Character_klass(),
5200 vmSymbols::isJavaIdentifierPart_name(),
5201 vmSymbols::int_bool_signature(),
5202 &args,
5203 THREAD);
5204 } else {
5205 // public static boolean isJavaIdentifierStart(char ch);
5206 JavaCalls::call_static(&result,
5207 vmClasses::Character_klass(),
5208 vmSymbols::isJavaIdentifierStart_name(),
5209 vmSymbols::int_bool_signature(),
5210 &args,
5211 THREAD);
5212 }
5213 if (HAS_PENDING_EXCEPTION) {
5214 CLEAR_PENDING_EXCEPTION;
5215 return NULL;
5216 }
5217 if(result.get_jboolean()) {
5218 continue;
5219 }
5220 }
5221 return (not_first_ch) ? old_p : NULL;
5222 }
5223 return (not_first_ch && !last_is_slash) ? p : NULL;
5224 }
5225
5226 // Take pointer to a UTF8 byte string (not NUL-terminated).
5227 // Skip over the longest part of the string that could
5228 // be taken as a field signature. Allow "void" if void_ok.
5229 // Return a pointer to just past the signature.
5230 // Return NULL if no legal signature is found.
5231 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5232 bool void_ok,
5233 unsigned int length,
5234 TRAPS) const {
5235 unsigned int array_dim = 0;
5236 while (length > 0) {
5237 switch (signature[0]) {
5238 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5239 case JVM_SIGNATURE_BOOLEAN:
5240 case JVM_SIGNATURE_BYTE:
5241 case JVM_SIGNATURE_CHAR:
5242 case JVM_SIGNATURE_SHORT:
5243 case JVM_SIGNATURE_INT:
5244 case JVM_SIGNATURE_FLOAT:
5245 case JVM_SIGNATURE_LONG:
5246 case JVM_SIGNATURE_DOUBLE:
5247 return signature + 1;
5248 case JVM_SIGNATURE_PRIMITIVE_OBJECT:
5249 // Can't enable this check fully until JDK upgrades the bytecode generators (TODO: JDK-8270852).
5250 // For now, compare to class file version 51 so old verifier doesn't see Q signatures.
5251 if ( (_major_version < 51 /* CONSTANT_CLASS_DESCRIPTORS */ ) || (!EnablePrimitiveClasses)) {
5252 classfile_parse_error("Class name contains illegal Q-signature "
5253 "in descriptor in class file %s, requires option -XX:+EnablePrimitiveClasses",
5254 CHECK_0);
5255 return NULL;
5256 }
5257 // fall through
5258 case JVM_SIGNATURE_CLASS:
5259 {
5260 if (_major_version < JAVA_1_5_VERSION) {
5261 // Skip over the class name if one is there
5262 const char* const p = skip_over_field_name(signature + 1, true, --length);
5263
5264 // The next character better be a semicolon
5265 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5266 return p + 1;
5267 }
5268 }
5269 else {
5270 // Skip leading 'L' or 'Q' and ignore first appearance of ';'
5271 signature++;
5272 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5273 // Format check signature
5274 if (c != NULL) {
5275 int newlen = c - (char*) signature;
5276 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5277 if (!legal) {
5278 classfile_parse_error("Class name is empty or contains illegal character "
5279 "in descriptor in class file %s",
5280 THREAD);
5281 return NULL;
5282 }
5283 return signature + newlen + 1;
5284 }
5285 }
5286 return NULL;
5287 }
5288 case JVM_SIGNATURE_ARRAY:
5289 array_dim++;
5290 if (array_dim > 255) {
5291 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5292 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
5293 return NULL;
5294 }
5295 // The rest of what's there better be a legal signature
5296 signature++;
5297 length--;
5298 void_ok = false;
5299 break;
5300 default:
5301 return NULL;
5302 }
5303 }
5304 return NULL;
5305 }
5306
5307 // Checks if name is a legal class name.
5308 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5309 if (!_need_verify || _relax_verify) { return; }
5310
5311 assert(name->refcount() > 0, "symbol must be kept alive");
5312 char* bytes = (char*)name->bytes();
5313 unsigned int length = name->utf8_length();
5314 bool legal = false;
5315
5316 if (length > 0) {
5317 const char* p;
5318 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5319 p = skip_over_field_signature(bytes, false, length, CHECK);
5320 legal = (p != NULL) && ((p - bytes) == (int)length);
5321 } else if (_major_version < JAVA_1_5_VERSION) {
5322 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5323 p = skip_over_field_name(bytes, true, length);
5324 legal = (p != NULL) && ((p - bytes) == (int)length);
5325 }
5326 } else if ((_major_version >= CONSTANT_CLASS_DESCRIPTORS || _class_name->starts_with("jdk/internal/reflect/"))
5327 && bytes[length - 1] == ';' ) {
5328 // Support for L...; and Q...; descriptors
5329 legal = verify_unqualified_name(bytes + 1, length - 2, LegalClass);
5330 } else {
5331 // 4900761: relax the constraints based on JSR202 spec
5332 // Class names may be drawn from the entire Unicode character set.
5333 // Identifiers between '/' must be unqualified names.
5334 // The utf8 string has been verified when parsing cpool entries.
5335 legal = verify_unqualified_name(bytes, length, LegalClass);
5336 }
5337 }
5338 if (!legal) {
5339 ResourceMark rm(THREAD);
5340 assert(_class_name != NULL, "invariant");
5341 Exceptions::fthrow(
5342 THREAD_AND_LOCATION,
5343 vmSymbols::java_lang_ClassFormatError(),
5344 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5345 _class_name->as_C_string()
5346 );
5347 return;
5348 }
5349 }
5350
5351 // Checks if name is a legal field name.
5352 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5353 if (!_need_verify || _relax_verify) { return; }
5354
5355 char* bytes = (char*)name->bytes();
5356 unsigned int length = name->utf8_length();
5357 bool legal = false;
5358
5359 if (length > 0) {
5360 if (_major_version < JAVA_1_5_VERSION) {
5361 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5362 const char* p = skip_over_field_name(bytes, false, length);
5363 legal = (p != NULL) && ((p - bytes) == (int)length);
5364 }
5365 } else {
5366 // 4881221: relax the constraints based on JSR202 spec
5367 legal = verify_unqualified_name(bytes, length, LegalField);
5368 }
5369 }
5370
5371 if (!legal) {
5372 ResourceMark rm(THREAD);
5373 assert(_class_name != NULL, "invariant");
5374 Exceptions::fthrow(
5375 THREAD_AND_LOCATION,
5376 vmSymbols::java_lang_ClassFormatError(),
5377 "Illegal field name \"%.*s\" in class %s", length, bytes,
5378 _class_name->as_C_string()
5379 );
5380 return;
5381 }
5382 }
5383
5384 // Checks if name is a legal method name.
5385 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5386 if (!_need_verify || _relax_verify) { return; }
5387
5388 assert(name != NULL, "method name is null");
5389 char* bytes = (char*)name->bytes();
5390 unsigned int length = name->utf8_length();
5391 bool legal = false;
5392
5393 if (length > 0) {
5394 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5395 if (name == vmSymbols::object_initializer_name() ||
5396 name == vmSymbols::class_initializer_name() ||
5397 (EnableValhalla && supports_inline_types() &&
5398 name == vmSymbols::inline_factory_name())) {
5399 legal = true;
5400 }
5401 } else if (_major_version < JAVA_1_5_VERSION) {
5402 const char* p;
5403 p = skip_over_field_name(bytes, false, length);
5404 legal = (p != NULL) && ((p - bytes) == (int)length);
5405 } else {
5406 // 4881221: relax the constraints based on JSR202 spec
5407 legal = verify_unqualified_name(bytes, length, LegalMethod);
5408 }
5409 }
5410
5411 if (!legal) {
5412 ResourceMark rm(THREAD);
5413 assert(_class_name != NULL, "invariant");
5414 Exceptions::fthrow(
5415 THREAD_AND_LOCATION,
5416 vmSymbols::java_lang_ClassFormatError(),
5417 "Illegal method name \"%.*s\" in class %s", length, bytes,
5418 _class_name->as_C_string()
5419 );
5420 return;
5421 }
5422 }
5423
5424
5425 // Checks if signature is a legal field signature.
5426 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5427 const Symbol* signature,
5428 TRAPS) const {
5429 if (!_need_verify) { return; }
5430 if ((!supports_inline_types() || !EnablePrimitiveClasses) && (signature->is_Q_signature() || signature->is_Q_array_signature())) {
5431 throwIllegalSignature("Field", name, signature, CHECK);
5432 }
5433
5434 const char* const bytes = (const char* const)signature->bytes();
5435 const unsigned int length = signature->utf8_length();
5436 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5437
5438 if (p == NULL || (p - bytes) != (int)length) {
5439 throwIllegalSignature("Field", name, signature, CHECK);
5440 }
5441 }
5442
5443 // Check that the signature is compatible with the method name. For example,
5444 // check that <init> has a void signature.
5445 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
5446 const Symbol* signature,
5447 TRAPS) const {
5448 if (!_need_verify) {
5449 return;
5450 }
5451
5452 // Class initializers cannot have args for class format version >= 51.
5453 if (name == vmSymbols::class_initializer_name() &&
5454 signature != vmSymbols::void_method_signature() &&
5455 _major_version >= JAVA_7_VERSION) {
5456 throwIllegalSignature("Method", name, signature, THREAD);
5457 return;
5458 }
5459
5460 if (!is_value_class()) {
5461 int sig_length = signature->utf8_length();
5462 if (name->utf8_length() > 0 &&
5463 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
5464 sig_length > 0 &&
5465 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
5466 throwIllegalSignature("Method", name, signature, THREAD);
5467 }
5468 }
5469 }
5470
5471 // Checks if signature is a legal method signature.
5472 // Returns number of parameters
5473 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5474 const Symbol* signature,
5475 TRAPS) const {
5476 if (!_need_verify) {
5477 // make sure caller's args_size will be less than 0 even for non-static
5478 // method so it will be recomputed in compute_size_of_parameters().
5479 return -2;
5480 }
5481
5482 unsigned int args_size = 0;
5483 const char* p = (const char*)signature->bytes();
5484 unsigned int length = signature->utf8_length();
5485 const char* nextp;
5486
5487 // The first character must be a '('
5488 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5489 length--;
5490 // Skip over legal field signatures
5491 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5492 while ((length > 0) && (nextp != NULL)) {
5493 args_size++;
5494 if (p[0] == 'J' || p[0] == 'D') {
5495 args_size++;
5496 }
5497 length -= nextp - p;
5498 p = nextp;
5499 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5500 }
5501 // The first non-signature thing better be a ')'
5502 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5503 length--;
5504 // Now we better just have a return value
5505 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5506 if (nextp && ((int)length == (nextp - p))) {
5507 return args_size;
5508 }
5509 }
5510 }
5511 // Report error
5512 throwIllegalSignature("Method", name, signature, THREAD);
5513 return 0;
5514 }
5515
5516 int ClassFileParser::static_field_size() const {
5517 assert(_field_info != NULL, "invariant");
5518 return _field_info->_static_field_size;
5519 }
5520
5521 int ClassFileParser::total_oop_map_count() const {
5522 assert(_field_info != NULL, "invariant");
5523 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
5524 }
5525
5526 jint ClassFileParser::layout_size() const {
5527 assert(_field_info != NULL, "invariant");
5528 return _field_info->_instance_size;
5529 }
5530
5531 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5532 const Array<Method*>* methods) {
5533 assert(ik != NULL, "invariant");
5534 assert(methods != NULL, "invariant");
5535
5536 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5537 // (We used to do this lazily, but now we query it in Rewriter,
5538 // which is eagerly done for every method, so we might as well do it now,
5539 // when everything is fresh in memory.)
5540 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
5541
5542 if (klass_id != vmSymbolID::NO_SID) {
5543 for (int j = 0; j < methods->length(); ++j) {
5544 Method* method = methods->at(j);
5545 method->init_intrinsic_id(klass_id);
5546
5547 if (CheckIntrinsics) {
5548 // Check if an intrinsic is defined for method 'method',
5549 // but the method is not annotated with @IntrinsicCandidate.
5550 if (method->intrinsic_id() != vmIntrinsics::_none &&
5551 !method->intrinsic_candidate()) {
5552 tty->print("Compiler intrinsic is defined for method [%s], "
5553 "but the method is not annotated with @IntrinsicCandidate.%s",
5554 method->name_and_sig_as_C_string(),
5555 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5556 );
5557 tty->cr();
5558 DEBUG_ONLY(vm_exit(1));
5559 }
5560 // Check is the method 'method' is annotated with @IntrinsicCandidate,
5561 // but there is no intrinsic available for it.
5562 if (method->intrinsic_candidate() &&
5563 method->intrinsic_id() == vmIntrinsics::_none) {
5564 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
5565 "but no compiler intrinsic is defined for the method.%s",
5566 method->name_and_sig_as_C_string(),
5567 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5568 );
5569 tty->cr();
5570 DEBUG_ONLY(vm_exit(1));
5571 }
5572 }
5573 } // end for
5574
5575 #ifdef ASSERT
5576 if (CheckIntrinsics) {
5577 // Check for orphan methods in the current class. A method m
5578 // of a class C is orphan if an intrinsic is defined for method m,
5579 // but class C does not declare m.
5580 // The check is potentially expensive, therefore it is available
5581 // only in debug builds.
5582
5583 for (auto id : EnumRange<vmIntrinsicID>{}) {
5584 if (vmIntrinsics::_compiledLambdaForm == id) {
5585 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5586 // generated for the JVM from a LambdaForm and therefore no method
5587 // is defined for it.
5588 continue;
5589 }
5590 if (vmIntrinsics::_blackhole == id) {
5591 // The _blackhole intrinsic is a special marker. No explicit method
5592 // is defined for it.
5593 continue;
5594 }
5595
5596 if (vmIntrinsics::class_for(id) == klass_id) {
5597 // Check if the current class contains a method with the same
5598 // name, flags, signature.
5599 bool match = false;
5600 for (int j = 0; j < methods->length(); ++j) {
5601 const Method* method = methods->at(j);
5602 if (method->intrinsic_id() == id) {
5603 match = true;
5604 break;
5605 }
5606 }
5607
5608 if (!match) {
5609 char buf[1000];
5610 tty->print("Compiler intrinsic is defined for method [%s], "
5611 "but the method is not available in class [%s].%s",
5612 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
5613 ik->name()->as_C_string(),
5614 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5615 );
5616 tty->cr();
5617 DEBUG_ONLY(vm_exit(1));
5618 }
5619 }
5620 } // end for
5621 } // CheckIntrinsics
5622 #endif // ASSERT
5623 }
5624 }
5625
5626 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5627 const ClassInstanceInfo& cl_inst_info,
5628 TRAPS) {
5629 if (_klass != NULL) {
5630 return _klass;
5631 }
5632
5633 InstanceKlass* const ik =
5634 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5635
5636 if (is_hidden()) {
5637 mangle_hidden_class_name(ik);
5638 }
5639
5640 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5641
5642 assert(_klass == ik, "invariant");
5643 return ik;
5644 }
5645
5646 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5647 bool changed_by_loadhook,
5648 const ClassInstanceInfo& cl_inst_info,
5649 TRAPS) {
5650 assert(ik != NULL, "invariant");
5651
5652 // Set name and CLD before adding to CLD
5653 ik->set_class_loader_data(_loader_data);
5654 ik->set_name(_class_name);
5655
5656 // Add all classes to our internal class loader list here,
5657 // including classes in the bootstrap (NULL) class loader.
5658 const bool publicize = !is_internal();
5659
5660 _loader_data->add_class(ik, publicize);
5661
5662 set_klass_to_deallocate(ik);
5663
5664 assert(_field_info != NULL, "invariant");
5665 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5666 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5667 "sanity");
5668
5669 assert(ik->is_instance_klass(), "sanity");
5670 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5671
5672 // Fill in information already parsed
5673 ik->set_should_verify_class(_need_verify);
5674
5675 // Not yet: supers are done below to support the new subtype-checking fields
5676 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5677 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5678 if (_field_info->_is_naturally_atomic && ik->is_inline_klass()) {
5679 ik->set_is_naturally_atomic();
5680 }
5681
5682 if (carries_identity_modifier()) {
5683 ik->set_carries_identity_modifier();
5684 } else if (carries_value_modifier()) {
5685 ik->set_carries_value_modifier();
5686 }
5687
5688 assert(_fac != NULL, "invariant");
5689 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_INLINE]);
5690
5691 // this transfers ownership of a lot of arrays from
5692 // the parser onto the InstanceKlass*
5693 apply_parsed_class_metadata(ik, _java_fields_count);
5694
5695 // can only set dynamic nest-host after static nest information is set
5696 if (cl_inst_info.dynamic_nest_host() != NULL) {
5697 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5698 }
5699
5700 // note that is not safe to use the fields in the parser from this point on
5701 assert(NULL == _cp, "invariant");
5702 assert(NULL == _fields, "invariant");
5703 assert(NULL == _methods, "invariant");
5704 assert(NULL == _inner_classes, "invariant");
5705 assert(NULL == _nest_members, "invariant");
5706 assert(NULL == _preload_classes, "invariant");
5707 assert(NULL == _combined_annotations, "invariant");
5708 assert(NULL == _record_components, "invariant");
5709 assert(NULL == _permitted_subclasses, "invariant");
5710
5711 if (_has_final_method) {
5712 ik->set_has_final_method();
5713 }
5714
5715 ik->copy_method_ordering(_method_ordering, CHECK);
5716 // The InstanceKlass::_methods_jmethod_ids cache
5717 // is managed on the assumption that the initial cache
5718 // size is equal to the number of methods in the class. If
5719 // that changes, then InstanceKlass::idnum_can_increment()
5720 // has to be changed accordingly.
5721 ik->set_initial_method_idnum(ik->methods()->length());
5722
5723 ik->set_this_class_index(_this_class_index);
5724
5725 if (_is_hidden) {
5726 // _this_class_index is a CONSTANT_Class entry that refers to this
5727 // hidden class itself. If this class needs to refer to its own methods
5728 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5729 // _this_class_index. However, because this class is hidden (it's
5730 // not stored in SystemDictionary), _this_class_index cannot be resolved
5731 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5732 // Therefore, we must eagerly resolve _this_class_index now.
5733 ik->constants()->klass_at_put(_this_class_index, ik);
5734 }
5735
5736 ik->set_minor_version(_minor_version);
5737 ik->set_major_version(_major_version);
5738 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5739 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5740 if (_is_declared_atomic) {
5741 ik->set_is_declared_atomic();
5742 }
5743
5744 if (_is_hidden) {
5745 ik->set_is_hidden();
5746 }
5747
5748 // Set PackageEntry for this_klass
5749 oop cl = ik->class_loader();
5750 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5751 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5752 ik->set_package(cld, NULL, CHECK);
5753
5754 const Array<Method*>* const methods = ik->methods();
5755 assert(methods != NULL, "invariant");
5756 const int methods_len = methods->length();
5757
5758 check_methods_for_intrinsics(ik, methods);
5759
5760 // Fill in field values obtained by parse_classfile_attributes
5761 if (_parsed_annotations->has_any_annotations()) {
5762 _parsed_annotations->apply_to(ik);
5763 }
5764
5765 apply_parsed_class_attributes(ik);
5766
5767 // Miranda methods
5768 if ((_num_miranda_methods > 0) ||
5769 // if this class introduced new miranda methods or
5770 (_super_klass != NULL && _super_klass->has_miranda_methods())
5771 // super class exists and this class inherited miranda methods
5772 ) {
5773 ik->set_has_miranda_methods(); // then set a flag
5774 }
5775
5776 // Fill in information needed to compute superclasses.
5777 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5778 ik->set_transitive_interfaces(_transitive_interfaces);
5779 ik->set_local_interfaces(_local_interfaces);
5780 _transitive_interfaces = NULL;
5781 _local_interfaces = NULL;
5782
5783 // Initialize itable offset tables
5784 klassItable::setup_itable_offset_table(ik);
5785
5786 // Compute transitive closure of interfaces this class implements
5787 // Do final class setup
5788 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5789 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5790 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5791 }
5792
5793 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5794 ( _super_klass != NULL && _super_klass->has_contended_annotations())) {
5795 ik->set_has_contended_annotations(true);
5796 }
5797
5798 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5799 set_precomputed_flags(ik);
5800
5801 // check if this class can access its super class
5802 check_super_class_access(ik, CHECK);
5803
5804 // check if this class can access its superinterfaces
5805 check_super_interface_access(ik, CHECK);
5806
5807 // check if this class overrides any final method
5808 check_final_method_override(ik, CHECK);
5809
5810 // reject static interface methods prior to Java 8
5811 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5812 check_illegal_static_method(ik, CHECK);
5813 }
5814
5815 // Obtain this_klass' module entry
5816 ModuleEntry* module_entry = ik->module();
5817 assert(module_entry != NULL, "module_entry should always be set");
5818
5819 // Obtain java.lang.Module
5820 Handle module_handle(THREAD, module_entry->module());
5821
5822 // Allocate mirror and initialize static fields
5823 // The create_mirror() call will also call compute_modifiers()
5824 java_lang_Class::create_mirror(ik,
5825 Handle(THREAD, _loader_data->class_loader()),
5826 module_handle,
5827 _protection_domain,
5828 cl_inst_info.class_data(),
5829 CHECK);
5830
5831 assert(_all_mirandas != NULL, "invariant");
5832
5833 // Generate any default methods - default methods are public interface methods
5834 // that have a default implementation. This is new with Java 8.
5835 if (_has_nonstatic_concrete_methods) {
5836 DefaultMethods::generate_default_methods(ik,
5837 _all_mirandas,
5838 CHECK);
5839 }
5840
5841 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5842 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5843 !module_entry->has_default_read_edges()) {
5844 if (!module_entry->set_has_default_read_edges()) {
5845 // We won a potential race
5846 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5847 }
5848 }
5849
5850 bool all_fields_empty = true;
5851 for (AllFieldStream fs(ik->fields(), ik->constants()); !fs.done(); fs.next()) {
5852 if (!fs.access_flags().is_static()) {
5853 if (fs.field_descriptor().is_inline_type()) {
5854 Klass* k = _inline_type_field_klasses->at(fs.index());
5855 ik->set_inline_type_field_klass(fs.index(), k);
5856 if (!InlineKlass::cast(k)->is_empty_inline_type()) { all_fields_empty = false; }
5857 } else {
5858 all_fields_empty = false;
5859 }
5860 } else if (is_inline_type() && (fs.name() == vmSymbols::default_value_name())) {
5861 InlineKlass::cast(ik)->set_default_value_offset(ik->field_offset(fs.index()));
5862 }
5863 }
5864
5865 if (_is_empty_inline_type || (is_inline_type() && all_fields_empty)) {
5866 ik->set_is_empty_inline_type();
5867 }
5868
5869 if (is_inline_type()) {
5870 InlineKlass* vk = InlineKlass::cast(ik);
5871 vk->set_alignment(_alignment);
5872 vk->set_first_field_offset(_first_field_offset);
5873 vk->set_exact_size_in_bytes(_exact_size_in_bytes);
5874 InlineKlass::cast(ik)->initialize_calling_convention(CHECK);
5875 }
5876
5877 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5878
5879 if (!is_internal()) {
5880 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5881
5882 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5883 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5884 log_is_enabled(Info, class, preview)) {
5885 ResourceMark rm;
5886 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5887 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5888 }
5889
5890 if (log_is_enabled(Debug, class, resolve)) {
5891 ResourceMark rm;
5892 // print out the superclass.
5893 const char * from = ik->external_name();
5894 if (ik->java_super() != NULL) {
5895 log_debug(class, resolve)("%s %s (super)",
5896 from,
5897 ik->java_super()->external_name());
5898 }
5899 // print out each of the interface classes referred to by this class.
5900 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5901 if (local_interfaces != NULL) {
5902 const int length = local_interfaces->length();
5903 for (int i = 0; i < length; i++) {
5904 const InstanceKlass* const k = local_interfaces->at(i);
5905 const char * to = k->external_name();
5906 log_debug(class, resolve)("%s %s (interface)", from, to);
5907 }
5908 }
5909 }
5910 }
5911
5912 JFR_ONLY(INIT_ID(ik);)
5913
5914 // If we reach here, all is well.
5915 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5916 // in order for it to not be destroyed in the ClassFileParser destructor.
5917 set_klass_to_deallocate(NULL);
5918
5919 // it's official
5920 set_klass(ik);
5921
5922 debug_only(ik->verify();)
5923 }
5924
5925 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5926 // Decrement the refcount in the old name, since we're clobbering it.
5927 _class_name->decrement_refcount();
5928
5929 _class_name = new_class_name;
5930 // Increment the refcount of the new name.
5931 // Now the ClassFileParser owns this name and will decrement in
5932 // the destructor.
5933 _class_name->increment_refcount();
5934 }
5935
5936 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5937 bool trusted = loader_data->is_boot_class_loader_data() ||
5938 loader_data->is_platform_class_loader_data();
5939 bool need_verify =
5940 // verifyAll
5941 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5942 // verifyRemote
5943 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5944 return !need_verify;
5945 }
5946
5947 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5948 Symbol* name,
5949 ClassLoaderData* loader_data,
5950 const ClassLoadInfo* cl_info,
5951 Publicity pub_level,
5952 TRAPS) :
5953 _stream(stream),
5954 _class_name(NULL),
5955 _loader_data(loader_data),
5956 _is_hidden(cl_info->is_hidden()),
5957 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5958 _orig_cp_size(0),
5959 _super_klass(),
5960 _cp(NULL),
5961 _fields(NULL),
5962 _methods(NULL),
5963 _inner_classes(NULL),
5964 _nest_members(NULL),
5965 _nest_host(0),
5966 _permitted_subclasses(NULL),
5967 _preload_classes(NULL),
5968 _record_components(NULL),
5969 _local_interfaces(NULL),
5970 _local_interface_indexes(NULL),
5971 _transitive_interfaces(NULL),
5972 _combined_annotations(NULL),
5973 _class_annotations(NULL),
5974 _class_type_annotations(NULL),
5975 _fields_annotations(NULL),
5976 _fields_type_annotations(NULL),
5977 _klass(NULL),
5978 _klass_to_deallocate(NULL),
5979 _parsed_annotations(NULL),
5980 _fac(NULL),
5981 _field_info(NULL),
5982 _inline_type_field_klasses(NULL),
5983 _method_ordering(NULL),
5984 _all_mirandas(NULL),
5985 _vtable_size(0),
5986 _itable_size(0),
5987 _num_miranda_methods(0),
5988 _protection_domain(cl_info->protection_domain()),
5989 _access_flags(),
5990 _pub_level(pub_level),
5991 _bad_constant_seen(0),
5992 _synthetic_flag(false),
5993 _sde_length(false),
5994 _sde_buffer(NULL),
5995 _sourcefile_index(0),
5996 _generic_signature_index(0),
5997 _major_version(0),
5998 _minor_version(0),
5999 _this_class_index(0),
6000 _super_class_index(0),
6001 _itfs_len(0),
6002 _java_fields_count(0),
6003 _need_verify(false),
6004 _relax_verify(false),
6005 _has_nonstatic_concrete_methods(false),
6006 _declares_nonstatic_concrete_methods(false),
6007 _has_final_method(false),
6008 _has_contended_fields(false),
6009 _has_inline_type_fields(false),
6010 _has_nonstatic_fields(false),
6011 _is_empty_inline_type(false),
6012 _is_naturally_atomic(false),
6013 _is_declared_atomic(false),
6014 _carries_value_modifier(false),
6015 _carries_identity_modifier(false),
6016 _has_finalizer(false),
6017 _has_empty_finalizer(false),
6018 _has_vanilla_constructor(false),
6019 _max_bootstrap_specifier_index(-1) {
6020
6021 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
6022 _class_name->increment_refcount();
6023
6024 assert(_loader_data != NULL, "invariant");
6025 assert(stream != NULL, "invariant");
6026 assert(_stream != NULL, "invariant");
6027 assert(_stream->buffer() == _stream->current(), "invariant");
6028 assert(_class_name != NULL, "invariant");
6029 assert(0 == _access_flags.as_int(), "invariant");
6030
6031 // Figure out whether we can skip format checking (matching classic VM behavior)
6032 if (DumpSharedSpaces) {
6033 // verify == true means it's a 'remote' class (i.e., non-boot class)
6034 // Verification decision is based on BytecodeVerificationRemote flag
6035 // for those classes.
6036 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
6037 BytecodeVerificationLocal;
6038 }
6039 else {
6040 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
6041 stream->need_verify());
6042 }
6043
6044 // synch back verification state to stream
6045 stream->set_verify(_need_verify);
6046
6047 // Check if verification needs to be relaxed for this class file
6048 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
6049 _relax_verify = relax_format_check_for(_loader_data);
6050
6051 parse_stream(stream, CHECK);
6052
6053 post_process_parsed_stream(stream, _cp, CHECK);
6054 }
6055
6056 void ClassFileParser::clear_class_metadata() {
6057 // metadata created before the instance klass is created. Must be
6058 // deallocated if classfile parsing returns an error.
6059 _cp = NULL;
6060 _fields = NULL;
6061 _methods = NULL;
6062 _inner_classes = NULL;
6063 _nest_members = NULL;
6064 _permitted_subclasses = NULL;
6065 _preload_classes = NULL;
6066 _combined_annotations = NULL;
6067 _class_annotations = _class_type_annotations = NULL;
6068 _fields_annotations = _fields_type_annotations = NULL;
6069 _record_components = NULL;
6070 }
6071
6072 // Destructor to clean up
6073 ClassFileParser::~ClassFileParser() {
6074 _class_name->decrement_refcount();
6075
6076 if (_cp != NULL) {
6077 MetadataFactory::free_metadata(_loader_data, _cp);
6078 }
6079 if (_fields != NULL) {
6080 MetadataFactory::free_array<u2>(_loader_data, _fields);
6081 }
6082
6083 if (_inline_type_field_klasses != NULL) {
6084 MetadataFactory::free_array<InlineKlass*>(_loader_data, _inline_type_field_klasses);
6085 }
6086
6087 if (_methods != NULL) {
6088 // Free methods
6089 InstanceKlass::deallocate_methods(_loader_data, _methods);
6090 }
6091
6092 // beware of the Universe::empty_blah_array!!
6093 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6094 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6095 }
6096
6097 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
6098 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
6099 }
6100
6101 if (_record_components != NULL) {
6102 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
6103 }
6104
6105 if (_permitted_subclasses != NULL && _permitted_subclasses != Universe::the_empty_short_array()) {
6106 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
6107 }
6108
6109 if (_preload_classes != NULL && _preload_classes != Universe::the_empty_short_array()) {
6110 MetadataFactory::free_array<u2>(_loader_data, _preload_classes);
6111 }
6112
6113 // Free interfaces
6114 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6115 _local_interfaces, _transitive_interfaces);
6116
6117 if (_combined_annotations != NULL) {
6118 // After all annotations arrays have been created, they are installed into the
6119 // Annotations object that will be assigned to the InstanceKlass being created.
6120
6121 // Deallocate the Annotations object and the installed annotations arrays.
6122 _combined_annotations->deallocate_contents(_loader_data);
6123
6124 // If the _combined_annotations pointer is non-NULL,
6125 // then the other annotations fields should have been cleared.
6126 assert(_class_annotations == NULL, "Should have been cleared");
6127 assert(_class_type_annotations == NULL, "Should have been cleared");
6128 assert(_fields_annotations == NULL, "Should have been cleared");
6129 assert(_fields_type_annotations == NULL, "Should have been cleared");
6130 } else {
6131 // If the annotations arrays were not installed into the Annotations object,
6132 // then they have to be deallocated explicitly.
6133 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
6134 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
6135 Annotations::free_contents(_loader_data, _fields_annotations);
6136 Annotations::free_contents(_loader_data, _fields_type_annotations);
6137 }
6138
6139 clear_class_metadata();
6140 _transitive_interfaces = NULL;
6141 _local_interfaces = NULL;
6142
6143 // deallocate the klass if already created. Don't directly deallocate, but add
6144 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6145 // at a safepoint.
6146 if (_klass_to_deallocate != NULL) {
6147 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6148 }
6149 }
6150
6151 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6152 TRAPS) {
6153
6154 assert(stream != NULL, "invariant");
6155 assert(_class_name != NULL, "invariant");
6156
6157 // BEGIN STREAM PARSING
6158 stream->guarantee_more(8, CHECK); // magic, major, minor
6159 // Magic value
6160 const u4 magic = stream->get_u4_fast();
6161 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6162 "Incompatible magic value %u in class file %s",
6163 magic, CHECK);
6164
6165 // Version numbers
6166 _minor_version = stream->get_u2_fast();
6167 _major_version = stream->get_u2_fast();
6168
6169 // Check version numbers - we check this even with verifier off
6170 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6171
6172 stream->guarantee_more(3, CHECK); // length, first cp tag
6173 u2 cp_size = stream->get_u2_fast();
6174
6175 guarantee_property(
6176 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6177 cp_size, CHECK);
6178
6179 _orig_cp_size = cp_size;
6180 if (is_hidden()) { // Add a slot for hidden class name.
6181 cp_size++;
6182 }
6183
6184 _cp = ConstantPool::allocate(_loader_data,
6185 cp_size,
6186 CHECK);
6187
6188 ConstantPool* const cp = _cp;
6189
6190 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6191
6192 assert(cp_size == (const u2)cp->length(), "invariant");
6193
6194 // ACCESS FLAGS
6195 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6196
6197 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6198 // JVM_ACC_MODULE is defined in JDK-9 and later.
6199 if (_major_version >= JAVA_9_VERSION) {
6200 recognized_modifiers |= JVM_ACC_MODULE;
6201 }
6202 // JVM_ACC_VALUE and JVM_ACC_PRIMITIVE supported version
6203 if (supports_inline_types()) {
6204 recognized_modifiers |= JVM_ACC_PRIMITIVE | JVM_ACC_VALUE;
6205 }
6206
6207 // Access flags
6208 jint flags = stream->get_u2_fast() & recognized_modifiers;
6209
6210 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6211 // Set abstract bit for old class files for backward compatibility
6212 flags |= JVM_ACC_ABSTRACT;
6213 }
6214
6215 // This class and superclass
6216 _this_class_index = stream->get_u2_fast();
6217 check_property(
6218 valid_cp_range(_this_class_index, cp_size) &&
6219 cp->tag_at(_this_class_index).is_unresolved_klass(),
6220 "Invalid this class index %u in constant pool in class file %s",
6221 _this_class_index, CHECK);
6222
6223 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6224 assert(class_name_in_cp != NULL, "class_name can't be null");
6225
6226 bool is_java_lang_Object = class_name_in_cp == vmSymbols::java_lang_Object();
6227
6228 verify_legal_class_modifiers(flags, NULL, is_java_lang_Object, CHECK);
6229
6230 if (EnableValhalla) {
6231 if(!supports_inline_types()) {
6232 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
6233 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
6234 if (!is_module && !is_interface && !is_java_lang_Object) {
6235 flags |= JVM_ACC_IDENTITY;
6236 }
6237 }
6238 }
6239
6240 _access_flags.set_flags(flags);
6241
6242 if (EnableValhalla) {
6243 if (_access_flags.is_identity_class()) set_carries_identity_modifier();
6244 if (_access_flags.is_value_class()) set_carries_value_modifier();
6245 if (carries_identity_modifier() && carries_value_modifier()) {
6246 classfile_parse_error("Class %s has both ACC_IDENTITY and ACC_VALUE modifiers", THREAD);
6247 }
6248 }
6249
6250 short bad_constant = class_bad_constant_seen();
6251 if (bad_constant != 0) {
6252 // Do not throw CFE until after the access_flags are checked because if
6253 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6254 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
6255 return;
6256 }
6257
6258 // Don't need to check whether this class name is legal or not.
6259 // It has been checked when constant pool is parsed.
6260 // However, make sure it is not an array type.
6261 if (_need_verify) {
6262 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
6263 "Bad class name in class file %s",
6264 CHECK);
6265 }
6266
6267 #ifdef ASSERT
6268 // Basic sanity checks
6269 if (_is_hidden) {
6270 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
6271 }
6272 #endif
6273
6274 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
6275
6276 if (_is_hidden) {
6277 assert(_class_name != NULL, "Unexpected null _class_name");
6278 #ifdef ASSERT
6279 if (_need_verify) {
6280 verify_legal_class_name(_class_name, CHECK);
6281 }
6282 #endif
6283
6284 } else {
6285 // Check if name in class file matches given name
6286 if (_class_name != class_name_in_cp) {
6287 if (_class_name != vmSymbols::unknown_class_name()) {
6288 ResourceMark rm(THREAD);
6289 Exceptions::fthrow(THREAD_AND_LOCATION,
6290 vmSymbols::java_lang_NoClassDefFoundError(),
6291 "%s (wrong name: %s)",
6292 _class_name->as_C_string(),
6293 class_name_in_cp->as_C_string()
6294 );
6295 return;
6296 } else {
6297 // The class name was not known by the caller so we set it from
6298 // the value in the CP.
6299 update_class_name(class_name_in_cp);
6300 }
6301 // else nothing to do: the expected class name matches what is in the CP
6302 }
6303 }
6304
6305 // Verification prevents us from creating names with dots in them, this
6306 // asserts that that's the case.
6307 assert(is_internal_format(_class_name), "external class name format used internally");
6308
6309 if (!is_internal()) {
6310 LogTarget(Debug, class, preorder) lt;
6311 if (lt.is_enabled()){
6312 ResourceMark rm(THREAD);
6313 LogStream ls(lt);
6314 ls.print("%s", _class_name->as_klass_external_name());
6315 if (stream->source() != NULL) {
6316 ls.print(" source: %s", stream->source());
6317 }
6318 ls.cr();
6319 }
6320 }
6321
6322 // SUPERKLASS
6323 _super_class_index = stream->get_u2_fast();
6324 _super_klass = parse_super_class(cp,
6325 _super_class_index,
6326 _need_verify,
6327 CHECK);
6328
6329 // Interfaces
6330 _itfs_len = stream->get_u2_fast();
6331 parse_interfaces(stream,
6332 _itfs_len,
6333 cp,
6334 &_has_nonstatic_concrete_methods,
6335 &_is_declared_atomic,
6336 CHECK);
6337
6338 // Fields (offsets are filled in later)
6339 _fac = new FieldAllocationCount();
6340 parse_fields(stream,
6341 _access_flags,
6342 _fac,
6343 cp,
6344 cp_size,
6345 &_java_fields_count,
6346 CHECK);
6347
6348 assert(_fields != NULL, "invariant");
6349
6350 // Methods
6351 AccessFlags promoted_flags;
6352 parse_methods(stream,
6353 is_interface(),
6354 is_value_class(),
6355 is_abstract_class(),
6356 &promoted_flags,
6357 &_has_final_method,
6358 &_declares_nonstatic_concrete_methods,
6359 CHECK);
6360
6361 assert(_methods != NULL, "invariant");
6362
6363 // promote flags from parse_methods() to the klass' flags
6364 _access_flags.add_promoted_flags(promoted_flags.as_int());
6365
6366 if (_declares_nonstatic_concrete_methods) {
6367 _has_nonstatic_concrete_methods = true;
6368 }
6369
6370 // Additional attributes/annotations
6371 _parsed_annotations = new ClassAnnotationCollector();
6372 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6373
6374 assert(_inner_classes != NULL, "invariant");
6375
6376 // Finalize the Annotations metadata object,
6377 // now that all annotation arrays have been created.
6378 create_combined_annotations(CHECK);
6379
6380 // Make sure this is the end of class file stream
6381 guarantee_property(stream->at_eos(),
6382 "Extra bytes at the end of class file %s",
6383 CHECK);
6384
6385 // all bytes in stream read and parsed
6386 }
6387
6388 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
6389 ResourceMark rm;
6390 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
6391 // use a '/' because that confuses finding the class's package. Also, can't
6392 // use an illegal char such as ';' because that causes serialization issues
6393 // and issues with hidden classes that create their own hidden classes.
6394 char addr_buf[20];
6395 if (DumpSharedSpaces) {
6396 // We want stable names for the archived hidden classes (only for static
6397 // archive for now). Spaces under default_SharedBaseAddress() will be
6398 // occupied by the archive at run time, so we know that no dynamically
6399 // loaded InstanceKlass will be placed under there.
6400 static volatile size_t counter = 0;
6401 Atomic::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
6402 size_t new_id = Atomic::add(&counter, (size_t)1);
6403 jio_snprintf(addr_buf, 20, SIZE_FORMAT_X, new_id);
6404 } else {
6405 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
6406 }
6407 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
6408 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
6409 jio_snprintf(new_name, new_name_len, "%s+%s",
6410 _class_name->as_C_string(), addr_buf);
6411 update_class_name(SymbolTable::new_symbol(new_name));
6412
6413 // Add a Utf8 entry containing the hidden name.
6414 assert(_class_name != NULL, "Unexpected null _class_name");
6415 int hidden_index = _orig_cp_size; // this is an extra slot we added
6416 _cp->symbol_at_put(hidden_index, _class_name);
6417
6418 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
6419 // We have to update the resolved_klass_index and the name_index together
6420 // so extract the existing resolved_klass_index first.
6421 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
6422 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
6423 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
6424 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
6425 "Bad name_index");
6426 }
6427
6428 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6429 ConstantPool* cp,
6430 TRAPS) {
6431 assert(stream != NULL, "invariant");
6432 assert(stream->at_eos(), "invariant");
6433 assert(cp != NULL, "invariant");
6434 assert(_loader_data != NULL, "invariant");
6435
6436 if (_class_name == vmSymbols::java_lang_Object()) {
6437 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6438 "java.lang.Object cannot implement an interface in class file %s",
6439 CHECK);
6440 }
6441 // We check super class after class file is parsed and format is checked
6442 if (_super_class_index > 0 && NULL == _super_klass) {
6443 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6444 if (is_interface()) {
6445 // Before attempting to resolve the superclass, check for class format
6446 // errors not checked yet.
6447 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6448 "Interfaces must have java.lang.Object as superclass in class file %s",
6449 CHECK);
6450 }
6451 Handle loader(THREAD, _loader_data->class_loader());
6452 _super_klass = (const InstanceKlass*)
6453 SystemDictionary::resolve_super_or_fail(_class_name,
6454 super_class_name,
6455 loader,
6456 _protection_domain,
6457 true,
6458 CHECK);
6459 }
6460
6461 if (_super_klass != NULL) {
6462 if (_super_klass->is_interface()) {
6463 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
6464 return;
6465 }
6466
6467 if (EnableValhalla) {
6468 check_identity_and_value_modifiers(this, _super_klass, CHECK);
6469 }
6470
6471 if (_super_klass->has_nonstatic_concrete_methods()) {
6472 _has_nonstatic_concrete_methods = true;
6473 }
6474 if (_super_klass->is_declared_atomic()) {
6475 _is_declared_atomic = true;
6476 }
6477 }
6478
6479 if (*ForceNonTearable != '\0') {
6480 // Allow a command line switch to force the same atomicity property:
6481 const char* class_name_str = _class_name->as_C_string();
6482 if (StringUtils::class_list_match(ForceNonTearable, class_name_str)) {
6483 _is_declared_atomic = true;
6484 }
6485 }
6486
6487 int itfs_len = _local_interface_indexes == NULL ? 0 : _local_interface_indexes->length();
6488 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
6489 if (_local_interface_indexes != NULL) {
6490 for (int i = 0; i < _local_interface_indexes->length(); i++) {
6491 u2 interface_index = _local_interface_indexes->at(i);
6492 Klass* interf;
6493 if (cp->tag_at(interface_index).is_klass()) {
6494 interf = cp->resolved_klass_at(interface_index);
6495 } else {
6496 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
6497
6498 // Don't need to check legal name because it's checked when parsing constant pool.
6499 // But need to make sure it's not an array type.
6500 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
6501 "Bad interface name in class file %s", CHECK);
6502
6503 // Call resolve_super so class circularity is checked
6504 interf = SystemDictionary::resolve_super_or_fail(
6505 _class_name,
6506 unresolved_klass,
6507 Handle(THREAD, _loader_data->class_loader()),
6508 _protection_domain,
6509 false,
6510 CHECK);
6511 }
6512
6513 if (!interf->is_interface()) {
6514 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
6515 err_msg("class %s can not implement %s, because it is not an interface (%s)",
6516 _class_name->as_klass_external_name(),
6517 interf->external_name(),
6518 interf->class_in_module_of_loader()));
6519 }
6520
6521 if (EnableValhalla) {
6522 // Check modifiers and set carries_identity_modifier/carries_value_modifier flags
6523 check_identity_and_value_modifiers(this, InstanceKlass::cast(interf), CHECK);
6524 }
6525
6526 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
6527 _has_nonstatic_concrete_methods = true;
6528 }
6529 if (InstanceKlass::cast(interf)->is_declared_atomic()) {
6530 _is_declared_atomic = true;
6531 }
6532 _local_interfaces->at_put(i, InstanceKlass::cast(interf));
6533 }
6534 }
6535 assert(_local_interfaces != NULL, "invariant");
6536
6537 // Compute the transitive list of all unique interfaces implemented by this class
6538 _transitive_interfaces =
6539 compute_transitive_interfaces(_super_klass,
6540 _local_interfaces,
6541 _loader_data,
6542 CHECK);
6543
6544 assert(_transitive_interfaces != NULL, "invariant");
6545
6546 // sort methods
6547 _method_ordering = sort_methods(_methods);
6548
6549 _all_mirandas = new GrowableArray<Method*>(20);
6550
6551 Handle loader(THREAD, _loader_data->class_loader());
6552 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6553 &_num_miranda_methods,
6554 _all_mirandas,
6555 _super_klass,
6556 _methods,
6557 _access_flags,
6558 _major_version,
6559 loader,
6560 _class_name,
6561 _local_interfaces);
6562
6563 // Size of Java itable (in words)
6564 _itable_size = is_interface() ? 0 :
6565 klassItable::compute_itable_size(_transitive_interfaces);
6566
6567 assert(_fac != NULL, "invariant");
6568 assert(_parsed_annotations != NULL, "invariant");
6569
6570
6571 if (EnablePrimitiveClasses) {
6572 _inline_type_field_klasses = MetadataFactory::new_array<InlineKlass*>(_loader_data,
6573 java_fields_count(),
6574 NULL,
6575 CHECK);
6576 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
6577 if (Signature::basic_type(fs.signature()) == T_PRIMITIVE_OBJECT && !fs.access_flags().is_static()) {
6578 // Pre-load inline class
6579 Klass* klass = SystemDictionary::resolve_inline_type_field_or_fail(&fs,
6580 Handle(THREAD, _loader_data->class_loader()),
6581 _protection_domain, true, CHECK);
6582 assert(klass != NULL, "Sanity check");
6583 if (!klass->access_flags().is_value_class()) {
6584 assert(klass->is_instance_klass(), "Sanity check");
6585 ResourceMark rm(THREAD);
6586 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
6587 err_msg("Class %s expects class %s to be an inline type, but it is not",
6588 _class_name->as_C_string(),
6589 InstanceKlass::cast(klass)->external_name()));
6590 }
6591 _inline_type_field_klasses->at_put(fs.index(), InlineKlass::cast(klass));
6592 }
6593 }
6594 }
6595
6596 _field_info = new FieldLayoutInfo();
6597 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, _fields,
6598 _parsed_annotations->is_contended(), is_inline_type(),
6599 _field_info, _inline_type_field_klasses);
6600 lb.build_layout(CHECK);
6601 if (is_inline_type()) {
6602 _alignment = lb.get_alignment();
6603 _first_field_offset = lb.get_first_field_offset();
6604 _exact_size_in_bytes = lb.get_exact_size_in_byte();
6605 }
6606 _has_inline_type_fields = _field_info->_has_inline_fields;
6607 }
6608
6609 void ClassFileParser::set_klass(InstanceKlass* klass) {
6610
6611 #ifdef ASSERT
6612 if (klass != NULL) {
6613 assert(NULL == _klass, "leaking?");
6614 }
6615 #endif
6616
6617 _klass = klass;
6618 }
6619
6620 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6621
6622 #ifdef ASSERT
6623 if (klass != NULL) {
6624 assert(NULL == _klass_to_deallocate, "leaking?");
6625 }
6626 #endif
6627
6628 _klass_to_deallocate = klass;
6629 }
6630
6631 // Caller responsible for ResourceMark
6632 // clone stream with rewound position
6633 const ClassFileStream* ClassFileParser::clone_stream() const {
6634 assert(_stream != NULL, "invariant");
6635
6636 return _stream->clone();
6637 }
6638
6639 ReferenceType ClassFileParser::super_reference_type() const {
6640 return _super_klass == NULL ? REF_NONE : _super_klass->reference_type();
6641 }
6642
6643 bool ClassFileParser::is_instance_ref_klass() const {
6644 // Only the subclasses of j.l.r.Reference are InstanceRefKlass.
6645 // j.l.r.Reference itself is InstanceKlass because InstanceRefKlass denotes a
6646 // klass requiring special treatment in ref-processing. The abstract
6647 // j.l.r.Reference cannot be instantiated so doesn't partake in
6648 // ref-processing.
6649 return is_java_lang_ref_Reference_subclass();
6650 }
6651
6652 bool ClassFileParser::is_java_lang_ref_Reference_subclass() const {
6653 if (_super_klass == NULL) {
6654 return false;
6655 }
6656
6657 if (_super_klass->name() == vmSymbols::java_lang_ref_Reference()) {
6658 // Direct subclass of j.l.r.Reference: Soft|Weak|Final|Phantom
6659 return true;
6660 }
6661
6662 return _super_klass->reference_type() != REF_NONE;
6663 }
6664
6665 // ----------------------------------------------------------------------------
6666 // debugging
6667
6668 #ifdef ASSERT
6669
6670 // return true if class_name contains no '.' (internal format is '/')
6671 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6672 if (class_name != NULL) {
6673 ResourceMark rm;
6674 char* name = class_name->as_C_string();
6675 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6676 } else {
6677 return true;
6678 }
6679 }
6680
6681 #endif